FS Specialty Lending Fund (FSEN) 10-Q15 May 232023 Q1 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2023	May 01, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	814-00841
Entity Registrant Name	FS Energy and Power Fund
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-6822130
Entity Address, Address Line One	201 Rouse Boulevard
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19112
City Area Code	215
Local Phone Number	495-1150
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		454,129,547
Entity Central Index Key	0001501729
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)		Mar. 31, 2023		Dec. 31, 2022
Assets
Investments, at fair value		$ 1,742,661,000	[1],[2],[3]	$ 2,047,115,000	[4],[5]
Cash		438,494,000		481,655,000
Receivable for investments sold and repaid		0		7,022,000
Interest receivable		17,890,000		21,932,000
Dividends receivable		878,000		878,000
Unrealized appreciation on swap contracts		379,000		0
Swap income receivable		65,000		83,000
Prepaid expenses and other assets		50,000		96,000
Total assets		2,200,417,000		2,558,781,000
Liabilities
Credit facilities payable (net of deferred financing costs of $0 and $238, respectively)	[6]	0		305,438,000
Secured note payable (net of deferred financing costs of $845 and $1,253, respectively)	[6]	455,535,000		454,671,000
Unrealized depreciation on swap contracts		0		698,000
Swap income payable		0		26,000
Shareholder distributions payable		13,584,000		13,543,000
Management fees payable		10,219,000		11,185,000
Administrative services expense payable		869,000		1,086,000
Interest payable		4,380,000		13,371,000
Trustees' fees payable		164,000		164,000
Other accrued expenses and liabilities		2,838,000		4,851,000
Total liabilities		487,589,000		805,033,000
Commitments and contingencies	[7]
Shareholders' equity
Preferred shares, $0.001 par value, 50,000,000 shares authorized, none issued and outstanding		0		0
Common shares, $0.001 par value, 700,000,000 shares authorized, 452,787,008 and 451,465,673 shares issued and outstanding, respectively		453,000		451,000
Capital in excess of par value		3,196,509,000		3,191,293,000
Accumulated earnings (deficit)		(1,484,134,000)		(1,437,996,000)
Total shareholders' equity		1,712,828,000		1,753,748,000
Total liabilities and shareholders' equity		$ 2,200,417,000		$ 2,558,781,000
Net asset value per common share at period end (in USD per share)		$ 3.78		$ 3.88
Non-controlled/unaffiliated investments
Assets
Investments, at fair value		$ 1,536,176,000		$ 1,786,887,000
Non-controlled/affiliated investments
Assets
Investments, at fair value		16,250,000		65,777,000
Controlled/affiliated investments
Assets
Investments, at fair value		$ 190,235,000		$ 194,451,000

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[4]Security may be an obligation of one or more entities affiliated with the named company.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[6]See Note 9 for a discussion of the Company's financing arrangements.[7]See Note 10 for a discussion of the Company's commitments and contingencies.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023		Dec. 31, 2022
Amortized cost	$ 1,648,959	[1],[2]	$ 1,922,940	[3]
Credit facilities payable of deferred financing cost	0		238
Secured note payable of deferred financing costs	$ 845		$ 1,253
Preferred stock, par value (in USD per share)	$ 0.001		$ 0.001
Preferred stock, shares authorized	50,000,000		50,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Common stock, par value (in USD per share)	$ 0.001		$ 0.001
Common stock, shares authorized	700,000,000		700,000,000
Common stock, shares issued	452,787,008		451,465,673
Common stock, shares outstanding	452,787,008		451,465,673
Non-controlled/unaffiliated investments
Amortized cost	$ 1,429,977		$ 1,656,169
Non-controlled/affiliated
Amortized cost	47,102		94,068
Controlled/affiliated
Amortized cost	$ 171,880		$ 172,703

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]Security may be an obligation of one or more entities affiliated with the named company.

Unaudited Consolidated Statemen

Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023		Mar. 31, 2022
Investment income
Paid-in-kind interest income		$ 4,502		$ 5,128
Total investment income		43,095		35,909
Operating expenses
Management fees		10,474		10,735
Administrative services expenses		1,320		1,420
Share transfer agent fees		751		720
Accounting and administrative fees		183		177
Interest expense	[1]	12,598		13,694
Trustees' fees		164		227
Other general and administrative expenses		703		1,444
Total operating expenses		26,193		28,417
Less: Management fee offset	[2]	(255)		(698)
Net expenses		25,938		27,719
Net investment income		17,157		8,190
Realized and unrealized gain/loss
Net realized gain (loss) on investments:		(20,207)		(29,044)
Net realized gain (loss) on foreign currency		(120)		0
Net realized gain (loss) on swap contracts		12		(416)
Net realized gain (loss) on debt extinguishment		0		(746)
Net change in unrealized appreciation (depreciation) on investments:		(30,473)		215,281
Net change in unrealized appreciation (depreciation) on swap contracts		1,077		(3,482)
Total net realized and unrealized gain (loss)		(49,711)		181,593
Net increase (decrease) in net assets resulting from operations		$ (32,554)		$ 189,783
Per share information—basic and diluted
Net increase (decrease) in net assets resulting from operations (Earnings per Share), basic (in dollars per share)		$ (0.07)		$ 0.42
Net increase (decrease) in net assets resulting from operations (Earnings per Share), diluted (in dollars per share)		$ (0.07)		$ 0.42
Weighted average shares outstanding, basic (in shares)		452,684,238		447,404,395
Weighted average shares outstanding, diluted (in shares)		452,684,238		447,404,395
Non-controlled/unaffiliated investments
Investment income
Interest income		$ 30,190		$ 23,140
Paid-in-kind interest income		4,306		4,423
Fee income		97		1,233
Dividend income		5,690		0
Realized and unrealized gain/loss
Net realized gain (loss) on investments:		(8,848)		(16,664)
Net change in unrealized appreciation (depreciation) on investments:		(24,519)		135,503
Non-controlled/affiliated
Investment income
Interest income		157		1,910
Paid-in-kind interest income		24	[3]	35
Dividend income		0		1,726
Realized and unrealized gain/loss
Net realized gain (loss) on investments:		(11,359)		(12,380)
Net change in unrealized appreciation (depreciation) on investments:		(2,561)		56,051
Controlled/affiliated
Investment income
Interest income		2,459		2,037
Paid-in-kind interest income		172	[4]	670
Dividend income		0		735
Realized and unrealized gain/loss
Net realized gain (loss) on investments:		0
Net change in unrealized appreciation (depreciation) on investments:		$ (3,393)		$ 23,727

[1]See Note 9 for a discussion of the Company's financing arrangements.[2]See Note 4 for a discussion of the offset by FS/EIG Advisor, LLC, the Company's investment adviser, of certain management fees to which it was otherwise entitled during the applicable period.[3] (3) Interest and PIK income presented for the three months ended March 31, 2023. (3) Interest and PIK income presented for the three months ended March 31, 2023.

Unaudited Consolidated Statem_2

Unaudited Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Operations
Net investment income		$ 17,157	$ 8,190
Net realized gain (loss) on investments, foreign currency, swap contracts and debt extinguishment		(20,315)	(30,206)
Net change in unrealized appreciation (depreciation) on investments		(30,473)	215,281
Net change in unrealized appreciation (depreciation) on swap contracts		1,077	(3,482)
Net increase (decrease) in net assets resulting from operations		(32,554)	189,783
Shareholder distributions
Distributions to shareholders	[1]	(13,584)	(13,426)
Net decrease in net assets resulting from shareholder distributions	[1]	(13,584)	(13,426)
Capital share transactions
Reinvestment of shareholder distributions	[2]	5,218	5,235
Net increase in net assets resulting from capital share transactions	[2]	5,218	5,235
Total increase (decrease) in net assets		(40,920)	181,592
Net assets at beginning of period		1,753,748	1,602,323
Net assets at end of period		$ 1,712,828	$ 1,783,915

[1]See Note 5 for a discussion of the sources of distributions paid by the Company.[2]See Note 3 for a discussion of the Company's common share transactions.

Unaudited Consolidated Statem_3

Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Cash flows from operating activities
Net Income (Loss) Attributable to Parent		$ (32,554)	$ 189,783
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of investments		(25,032)	(122,503)
Paid-in-kind interest income		(4,502)	(5,128)
Proceeds from sales and repayments of investments		284,570	238,748
Net realized (gain) loss on investments		20,207	29,044
Net change in unrealized (appreciation) depreciation on investments		30,473	(215,281)
Net change in unrealized (appreciation) depreciation on swap contracts		(1,077)	3,482
Accretion of discount		(1,262)	(2,029)
Amortization of deferred financing costs and discount		1,238	2,185
(Increase) decrease in receivable for investments sold and repaid		7,022	4,975
(Increase) decrease in interest receivable		4,042	7,129
(Increase) decrease in swap income receivable		18	0
(Increase) decrease in prepaid expenses and other assets		46	68
Increase (decrease) in payable for investments purchased		0	(49,500)
Increase (decrease) in swap income payable		(26)	416
Increase (decrease) in management fees payable		(966)	(429)
Increase (decrease) in administrative services expense payable		(217)	81
Increase (decrease) in interest payable	[1]	(8,991)	(9,468)
Trustees' fees		0	27
Increase (decrease) in other accrued expenses and liabilities		(2,013)	(368)
Net cash provided by (used in) operating activities		270,976	71,232
Cash flows from financing activities
Shareholder distributions paid		(8,325)	(8,153)
Borrowings under credit facilities	[1]	0	29,009
Repayments of credit facilities	[1]	(305,676)	(10,000)
Repayments under senior secured notes	[1]	0	(22,383)
Deferred financing costs paid		(136)	(132)
Net cash provided by (used in) financing activities		(314,137)	(11,659)
Total increase (decrease) in cash		(43,161)	59,573
Cash at beginning of period		481,655	33,879	$ 33,879
Cash at end of period		438,494	93,452	$ 481,655
Supplemental disclosure
Reinvestment of Distributions		5,218	5,235
Non-cash purchases of investments		(3,284)	(1,587)
Non-cash sales of investments		3,284	1,587
Excise and state taxes paid		$ 711	$ 846

[1]See Note 9 for a discussion of the Company's financing arrangements. During the three months ended March 31, 2023 and 2022, the Company paid $20,351 and $20,977, respectively, in interest expense on the financing arrangements and Senior Secured Notes.

Unaudited Consolidated Statem_4

Unaudited Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Cash Flows [Abstract]
Interest expense paid	$ 20,351	$ 20,977

Consolidated Schedule of Invest

Consolidated Schedule of Investments $ in Thousands		3 Months Ended		12 Months Ended
Consolidated Schedule of Investments $ in Thousands		Mar. 31, 2023 USD ($) MMBTU $ / shares $ / MMBTU $ / MBbls shares MBbls		Dec. 31, 2022 USD ($) MMBTU $ / shares $ / MBbls $ / MMBTU shares MBbls		Dec. 31, 2021 USD ($)
Percent of net assets		101.70%	[1],[2]	116.70%	[3]
Amortized Cost		$ 1,648,959	[1],[2]	$ 1,922,940	[3]
Investments, at fair value		1,742,661	[1],[2],[4]	2,047,115	[3],[5]
LIABILITIES IN EXCESS OF OTHER ASSETS		(29,833)	[1],[2],[4],[6]	(293,367)	[3],[5],[7]
NET ASSETS		$ 1,712,828	[1],[2],[4]	$ 1,753,748	[3],[5]
Liabilities in excess of other assets percentage		(1.70%)	[1],[2]	(16.70%)	[3]
Unrealized appreciation		$ 379	[8],[9]	$ 0	[10]
Unrealized depreciation		0	[8],[9]	698	[10]
Swap Contracts—Crude Oil
Unrealized appreciation		161	[8],[9]	0	[10]
Unrealized depreciation		$ 0	[8],[9]	$ 572	[10]
Fixed Price Swap Contracts Crude Oil
Notional amount, volume \| MBbls		123,680	[9]	168,511	[10]
Weighted Average Price \| $ / MBbls		80	[9]	80	[10]
Unrealized appreciation		$ 161	[8],[9]	$ 0	[10],[11]
Unrealized depreciation		0	[8],[9]	572	[10],[11]
Swap Contracts—Natural Gas
Unrealized appreciation		218	[8],[9]	0	[10]
Unrealized depreciation		$ 0	[8],[9]	$ 126	[10]
Fixed Price Swap Contracts Natural Gas
Notional amount, energy \| MMBTU		227,542	[9]	314,818	[10]
Weighted Average Price \| $ / MMBTU		3.80	[9]	3.80	[10]
Unrealized appreciation		$ 218	[8],[9]	$ 0	[10],[11]
Unrealized depreciation		$ 0	[8],[9]	$ 126	[10],[11]
Net Senior Secured Loans—First Lien
Percent of net assets		35%	[1],[2]	40.30%	[3]
Amortized Cost		$ 603,363	[1],[2]	$ 702,842	[3]
Investments, at fair value		599,454	[1],[2],[4]	706,646	[3],[5]
Total Senior Secured Loans—First Lien
Amortized Cost		627,300	[1],[2]	727,228	[3]
Investments, at fair value		623,391	[1],[2],[4]	731,032	[3],[5]
Unfunded Loan Commitments
Amortized Cost		23,937	[1],[2]	24,386	[3]
Investments, at fair value		$ 23,937	[1],[2],[4]	$ 24,386	[3],[5]
Net Senior Secured Loans—Second Lien
Percent of net assets		7.50%	[1],[2]	8.20%	[3]
Amortized Cost		$ 127,698	[1],[2]	$ 143,153	[3]
Investments, at fair value		$ 128,043	[1],[2],[4]	143,270	[3],[5]
Unfunded Loan Commitments
Amortized Cost	[3]			1,505
Investments, at fair value	[3],[5]			1,505
Total Senior Secured Loans—Second Lien
Amortized Cost	[3]			144,658
Investments, at fair value	[3],[5]			$ 144,775
Senior Secured Bonds
Percent of net assets		0.60%	[1],[2]	0.60%	[3]
Amortized Cost		$ 10,076	[1],[2]	$ 10,064	[3]
Investments, at fair value		$ 10,164	[1],[2],[4]	$ 10,074	[3],[5]
Unsecured Debt
Percent of net assets		8.10%	[1],[2]	13.70%	[3]
Amortized Cost		$ 143,504	[1],[2]	$ 253,675	[3]
Investments, at fair value		$ 139,919	[1],[2],[4]	$ 241,418	[3],[5]
Preferred Equity
Percent of net assets		24.20%	[1],[2]	22.80%	[3]
Amortized Cost		$ 425,761	[1],[2]	$ 425,182	[3]
Investments, at fair value		$ 414,699	[1],[2],[4]	$ 400,414	[3],[5]
Sustainable Infrastructure Investments, LLC
Percent of net assets		3.10%	[1],[2]	2.90%	[3]
Amortized Cost		$ 54,514	[1],[2]	$ 54,514	[3]
Investments, at fair value		$ 52,937	[1],[2],[4]	$ 51,098	[3],[5]
Equity/Other
Percent of net assets		23.20%	[1],[2]	28.20%	[3]
Amortized Cost		$ 284,043	[1],[2]	$ 333,510	[3]
Investments, at fair value		$ 397,445	[1],[2],[4]	$ 494,195	[3],[5]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 1
Variable Rate		4%	[1],[2],[12],[13],[14],[15]	4%	[3],[16],[17],[18]
PIK Rate		3%	[1],[2],[12],[13],[14],[15]	3%	[3],[16],[17],[18]
Max PIK Rate		3%	[1],[2],[12],[13],[14],[15]	3%	[3],[16],[17],[18]
Floor Rate		1.50%	[1],[2],[12],[13],[14],[15]	1.50%	[3],[16],[17],[18],[19]
Principal Amount		$ 22,902	[1],[2],[13],[14],[15],[20]	$ 22,734	[3],[16],[17],[18],[21]
Amortized Cost		20,250	[1],[2],[13],[14],[15]	20,082	[3],[16],[17],[18]
Investments, at fair value		$ 23,682	[1],[2],[4],[13],[14],[15]	$ 23,519	[3],[5],[16],[17],[18]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 2
Variable Rate		4%	[1],[2],[12],[13],[14],[15],[22]	4%	[3],[16],[17],[18],[23]
PIK Rate		3%	[1],[2],[12],[13],[14],[15],[22]	3%	[3],[16],[17],[18],[23]
Max PIK Rate		3%	[1],[2],[12],[13],[14],[15],[22]	3%	[3],[16],[17],[18],[23]
Floor Rate		1.50%	[1],[2],[12],[13],[14],[15],[22]	1.50%	[3],[16],[17],[18],[19],[23]
Principal Amount		$ 5,359	[1],[2],[13],[14],[15],[20],[22]	$ 5,359	[3],[16],[17],[18],[21],[23]
Amortized Cost		5,359	[1],[2],[13],[14],[15],[22]	5,359	[3],[16],[17],[18],[23]
Investments, at fair value		$ 5,542	[1],[2],[4],[13],[14],[15],[22]	$ 5,545	[3],[5],[16],[17],[18],[23]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Warrants, Strike: $1.00, Power
Investment, Strike Price \| $ / shares		$ 1	[1],[2],[13],[14],[15],[24]	$ 1	[3],[16],[18],[25],[26],[27]
Number of Shares \| shares		35	[1],[2],[13],[14],[15],[24]	35	[3],[16],[17],[18],[26],[27]
Amortized Cost		$ 2,652	[1],[2],[13],[14],[15],[24]	$ 2,652	[3],[16],[17],[18],[26],[27]
Investments, at fair value		$ 1,381	[1],[2],[4],[13],[14],[15],[24]	$ 1,630	[3],[5],[16],[17],[18],[26],[27]
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Equity, Service & Equipment
Number of Shares \| shares		6,944,444	[1],[2],[13],[24]	6,944,444	[3],[16],[26],[27]
Amortized Cost		$ 6,944	[1],[2],[13],[24]	$ 6,944	[3],[16],[26],[27]
Investments, at fair value		$ 1,313	[1],[2],[4],[13],[24]	$ 1,219	[3],[5],[16],[26],[27]
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Equity, Service & Equipment
Number of Shares \| shares		28,942,003	[1],[2],[13],[24]	28,942,003	[3],[16],[26],[27]
Amortized Cost		$ 1,447	[1],[2],[13],[24]	$ 1,447	[3],[16],[26],[27]
Investments, at fair value		$ 9,175	[1],[2],[4],[13],[24]	$ 8,321	[3],[5],[16],[26],[27]
Investment, Identifier [Axis]: Aethon III BR LLC, Upstream
Variable Rate		7.50%	[1],[2],[12],[13]	7.50%	[3],[16],[27]
Floor Rate		1.50%	[1],[2],[12],[13]	1.50%	[3],[16],[19],[27]
Principal Amount		$ 20,000	[1],[2],[13],[20]	$ 20,000	[3],[16],[21],[27]
Amortized Cost		19,862	[1],[2],[13]	19,848	[3],[16],[27]
Investments, at fair value		$ 20,111	[1],[2],[4],[13]	$ 20,138	[3],[5],[16],[27]
Investment, Identifier [Axis]: Aethon United BR LP, Upstream
Rate		8.30%	[1],[2],[12]	8.30%	[3],[27]
Principal Amount		$ 40,500	[1],[2],[20]	$ 40,500	[3],[21],[27]
Amortized Cost		40,500	[1],[2]	40,500	[3],[27]
Investments, at fair value		$ 39,780	[1],[2],[4]	40,221	[3],[5],[27]
Investment, Identifier [Axis]: AirSwift Holdings, Ltd., Common Equity, Service & Equipment
Number of Shares \| shares	[1],[2],[13],[15],[24]	3,750,000
Amortized Cost	[1],[2],[13],[15],[24]	$ 6,029
Investments, at fair value	[1],[2],[4],[13],[15],[24]	3,413
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC
Investments, at fair value		$ 7,553	[28]	$ 8,436	[28],[29]	$ 7,782	[29]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 1
PIK Rate		8%	[1],[2],[12],[13],[30]	8%	[3],[16],[25],[27]
Max PIK Rate		8%	[1],[2],[12],[13],[30]	8%	[3],[16],[25],[27]
Principal Amount		$ 7,553	[1],[2],[13],[20],[30]	$ 8,436	[3],[16],[21],[25],[27]
Amortized Cost		7,553	[1],[2],[13],[30]	8,436	[3],[16],[25],[27]
Investments, at fair value		$ 7,553	[1],[2],[4],[13],[30]	$ 8,436	[3],[5],[16],[25],[27]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 2
PIK Rate		8%	[1],[2],[12],[13],[22],[30]	8%	[3],[16],[23],[25]
Max PIK Rate		8%	[1],[2],[12],[13],[22],[30]	8%	[3],[16],[23],[25]
Principal Amount		$ 2,500	[1],[2],[13],[20],[22],[30]	$ 2,500	[3],[16],[21],[23],[25]
Amortized Cost		2,500	[1],[2],[13],[22],[30]	2,500	[3],[16],[23],[25]
Investments, at fair value		2,500	[1],[2],[4],[13],[22],[30]	2,500	[3],[5],[16],[23],[25]
Investment, Identifier [Axis]: Allied Wireline Services, LLC
Investments, at fair value		63,888		63,888		46,339
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity
Investments, at fair value		$ 12,385		$ 10,463		0
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity, Service & Equipment
Number of Shares \| shares		48,400	[1],[2],[13],[24],[30],[31]	48,400	[3],[16],[25],[26],[27],[32]
Amortized Cost		$ 1,527	[1],[2],[13],[24],[30],[31]	$ 1,527	[3],[16],[25],[26],[27],[32]
Investments, at fair value		$ 12,385	[1],[2],[4],[13],[24],[30],[31]	$ 10,463	[3],[5],[16],[25],[26],[27],[32]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Service & Equipment
PIK Rate		10%	[1],[2],[12],[13],[30]	10%	[3],[16],[25],[27]
Max PIK Rate		10%	[1],[2],[12],[13],[30]	10%	[3],[16],[25],[27]
Principal Amount		$ 63,888	[1],[2],[13],[20],[30]	$ 63,888	[3],[16],[21],[25],[27]
Amortized Cost		63,888	[1],[2],[13],[30]	63,888	[3],[16],[25],[27]
Investments, at fair value		63,888	[1],[2],[4],[13],[30]	63,888	[3],[5],[16],[25],[27]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants
Investments, at fair value		$ 0		$ 0		0
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants, Service & Equipment
Number of Shares \| shares		22,000	[1],[2],[13],[24],[30],[31]	22,000	[3],[16],[25],[26],[27],[32]
Amortized Cost		$ 0	[1],[2],[13],[24],[30],[31]	$ 0	[3],[16],[25],[26],[27],[32]
Investments, at fair value		$ 0	[1],[2],[4],[13],[24],[30],[31]	$ 0	[3],[5],[16],[25],[26],[27],[32]
Investment, Identifier [Axis]: Archrock Partners, L.P., Midstream
Rate	[3],[18],[27]			6.30%
Principal Amount	[3],[18],[21],[27]			$ 3,098
Amortized Cost	[3],[18],[27]			3,168
Investments, at fair value	[3],[5],[18],[27]			$ 2,840
Investment, Identifier [Axis]: Arena Energy, LP, Contingent Value Rights, Upstream
Number of Shares \| shares		126,632,117	[1],[2],[13]	126,632,117	[3],[16],[26],[27]
Amortized Cost		$ 351	[1],[2],[13]	$ 351	[3],[16],[26],[27]
Investments, at fair value		$ 514	[1],[2],[4],[13]	$ 858	[3],[5],[16],[26],[27]
Investment, Identifier [Axis]: Ascent Resources Utica Holdings, LLC, Common Equity, Upstream
Number of Shares \| shares		148,692,948	[1],[2],[13],[24],[31]	148,692,948	[3],[16],[26],[27],[32]
Amortized Cost		$ 44,700	[1],[2],[13],[24],[31]	$ 44,700	[3],[16],[26],[27],[32]
Investments, at fair value		$ 40,221	[1],[2],[4],[13],[24],[31]	$ 52,340	[3],[5],[16],[26],[27],[32]
Investment, Identifier [Axis]: Brazos Delaware II LLC, Midstream
Variable Rate	[3]			4%
Principal Amount	[3],[21]			$ 39,259
Amortized Cost	[3]			38,085
Investments, at fair value	[3],[5]			$ 39,137
Investment, Identifier [Axis]: CPV Maryland, LLC, Power
Variable Rate	[3]			4%
Floor Rate	[3],[19]			1%
Principal Amount	[3],[21]			$ 14,286
Amortized Cost	[3]			14,146
Investments, at fair value	[3],[5]			$ 14,155
Investment, Identifier [Axis]: CPV Shore Holdings LLC, Power
Variable Rate		3.75%	[1],[2],[12]	3.75%	[3]
Principal Amount		$ 23,601	[1],[2],[20]	$ 23,601	[3],[21]
Amortized Cost		22,819	[1],[2]	22,760	[3]
Investments, at fair value		$ 21,874	[1],[2],[4]	$ 21,935	[3],[5]
Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Common Equity, Service & Equipment
Number of Shares \| shares	[3],[16],[26],[27]			4,302,293
Amortized Cost	[3],[16],[26],[27]			$ 3,950
Investments, at fair value	[3],[5],[16],[26],[27]			$ 0
Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Participation Option, Service & Equipment
Number of Shares \| shares	[3],[16],[26],[27]			25,000,000
Amortized Cost	[3],[16],[26],[27]			$ 1,289
Investments, at fair value	[3],[5],[16],[26],[27]			$ 0
Investment, Identifier [Axis]: Cimarron Energy Inc., Service & Equipment
Variable Rate	[3],[16],[26],[27],[33]			9%
Floor Rate	[3],[16],[19],[26],[27],[33]			1%
Principal Amount	[3],[16],[21],[26],[27],[33]			$ 7,500
Amortized Cost	[3],[16],[26],[27],[33]			6,563
Investments, at fair value	[3],[5],[16],[26],[27],[33]			$ 3,713
Investment, Identifier [Axis]: Citizen Energy Operating, LLC, Upstream
Variable Rate		7.65%	[1],[2],[12],[13]	7.65%	[3],[16],[27]
Floor Rate		1%	[1],[2],[12],[13]	1%	[3],[16],[19],[27]
Principal Amount		$ 38,000	[1],[2],[13],[20]	$ 39,000	[3],[16],[21],[27]
Amortized Cost		37,466	[1],[2],[13]	38,440	[3],[16],[27]
Investments, at fair value		$ 37,380	[1],[2],[4],[13]	$ 38,240	[3],[5],[16],[27]
Investment, Identifier [Axis]: Compass Power Generation LLC, Power
Variable Rate		4.25%	[1],[2],[12]	4.25%	[3]
Floor Rate		1%	[1],[2],[12]	1%	[3],[19]
Principal Amount		$ 9,798	[1],[2],[20]	$ 31,575	[3],[21]
Amortized Cost		9,530	[1],[2]	30,712	[3]
Investments, at fair value		$ 9,777	[1],[2],[4]	$ 31,384	[3],[5]
Investment, Identifier [Axis]: Cox Oil Offshore, LLC, Volumetric Production Payments, Upstream
Rate		12.80%	[1],[2],[9],[12],[13],[34]	12.90%	[3],[10],[16],[35]
Principal Amount		$ 100,000	[1],[2],[9],[13],[20],[34]	$ 100,000	[3],[10],[16],[21],[35]
Amortized Cost		8,638	[1],[2],[9],[13],[34]	11,081	[3],[10],[16],[35]
Investments, at fair value		$ 12,822	[1],[2],[4],[9],[13],[34]	$ 20,683	[3],[5],[10],[16],[35]
Investment, Identifier [Axis]: EIF Van Hook Holdings, LLC, Midstream
Variable Rate		5.25%	[1],[2],[12]	5.25%	[3]
Principal Amount		$ 26,882	[1],[2],[20]	$ 26,882	[3],[21]
Amortized Cost		26,644	[1],[2]	26,609	[3]
Investments, at fair value		$ 26,781	[1],[2],[4]	$ 26,075	[3],[5]
Investment, Identifier [Axis]: ERA II Minerals, LLC, Upstream
Variable Rate		6.25%	[1],[2],[12],[13]	6.25%	[3],[16],[27]
Floor Rate		0.80%	[1],[2],[12],[13]	0.80%	[3],[16],[19],[27]
Principal Amount		$ 36,000	[1],[2],[13],[20]	$ 37,000	[3],[16],[21],[27]
Amortized Cost		35,628	[1],[2],[13]	36,601	[3],[16],[27]
Investments, at fair value		$ 35,564	[1],[2],[4],[13]	$ 36,656	[3],[5],[16],[27]
Investment, Identifier [Axis]: Earthstone Energy Holdings, LLC, Upstream
Rate		8%	[1],[2],[12],[15]	8%	[3],[18]
Principal Amount		$ 11,400	[1],[2],[15],[20]	$ 11,400	[3],[18],[21]
Amortized Cost		11,400	[1],[2],[15]	11,400	[3],[18]
Investments, at fair value		$ 11,073	[1],[2],[4],[15]	$ 10,920	[3],[5],[18]
Investment, Identifier [Axis]: Endeavor Energy Resources, L.P., Upstream
Rate	[3],[27]			5.80%
Principal Amount	[3],[21],[27]			$ 24,299
Amortized Cost	[3],[27]			25,388
Investments, at fair value	[3],[5],[27]			$ 23,306
Investment, Identifier [Axis]: FR BR Holdings LLC, Midstream
Variable Rate		6.50%	[1],[2],[12],[13]	6.50%	[3],[16],[27]
Principal Amount		$ 81,316	[1],[2],[13],[20]	$ 81,582	[3],[16],[21],[27]
Amortized Cost		80,393	[1],[2],[13]	80,371	[3],[16],[27]
Investments, at fair value		$ 81,242	[1],[2],[4],[13]	$ 81,361	[3],[5],[16],[27]
Investment, Identifier [Axis]: FR XIII PAA Holdings HoldCo, LLC, Midstream
Variable Rate		7.50%	[1],[2],[12],[13]	7.50%	[3],[16]
Floor Rate		0.50%	[1],[2],[12],[13]	0.50%	[3],[16],[19]
Principal Amount		$ 17,272	[1],[2],[13],[20]	$ 17,347	[3],[16],[21]
Amortized Cost		17,040	[1],[2],[13]	17,103	[3],[16]
Investments, at fair value		$ 17,351	[1],[2],[4],[13]	$ 17,406	[3],[5],[16]
Investment, Identifier [Axis]: GIP II Blue Holding LP, Midstream
Variable Rate		4.50%	[1],[2],[12]	4.50%	[3]
Floor Rate		1%	[1],[2],[12]	1%	[3],[19]
Principal Amount		$ 5,812	[1],[2],[20]	$ 5,918	[3],[21]
Amortized Cost		5,740	[1],[2]	5,842	[3]
Investments, at fair value		5,792	[1],[2],[4]	5,877	[3],[5]
Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity
Investments, at fair value		$ 3,607		$ 5,044		0
Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity, Midstream
Number of Shares \| shares		105,785	[1],[2],[13],[24],[31],[36]	105,785	[3],[16],[26],[27],[32],[37]
Amortized Cost		$ 6,681	[1],[2],[13],[24],[31],[36]	$ 6,681	[3],[16],[26],[27],[32],[37]
Investments, at fair value		$ 3,607	[1],[2],[4],[13],[24],[31],[36]	$ 5,044	[3],[5],[16],[26],[27],[32],[37]
Investment, Identifier [Axis]: GasLog Ltd., Midstream
Variable Rate	[3],[16],[18]			7.75%
Rate	[1],[2],[12],[13],[15]	7.80%
Principal Amount		$ 14,648	[1],[2],[13],[15],[20]	$ 14,648	[3],[16],[18],[21]
Amortized Cost		14,559	[1],[2],[13],[15]	14,556	[3],[16],[18]
Investments, at fair value		$ 14,125	[1],[2],[4],[13],[15]	$ 14,010	[3],[5],[16],[18]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 1
Variable Rate		5%	[1],[2],[12]	5%	[3]
Floor Rate		0.80%	[1],[2],[12]	0.80%	[3],[19]
Principal Amount		$ 7,092	[1],[2],[20]	$ 7,432	[3],[21]
Amortized Cost		6,976	[1],[2]	7,305	[3]
Investments, at fair value		$ 7,091	[1],[2],[4]	$ 7,385	[3],[5]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 2
Variable Rate		5%	[1],[2],[12]	5%	[3]
Floor Rate		0.80%	[1],[2],[12]	0.80%	[3],[19]
Principal Amount		$ 163	[1],[2],[20]	$ 163	[3],[21]
Amortized Cost		160	[1],[2]	160	[3]
Investments, at fair value		$ 163	[1],[2],[4]	$ 162	[3],[5]
Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 1
Number of Shares \| shares		2,785,562	[1],[2],[13],[24]	2,785,562	[3],[16],[26],[27]
Amortized Cost		$ 2,786	[1],[2],[13],[24]	$ 2,786	[3],[16],[26],[27]
Investments, at fair value		$ 0	[1],[2],[4],[13],[24]	$ 0	[3],[5],[16],[26],[27]
Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 2
PIK Rate		9%	[1],[2],[12],[13],[24],[38]	9%	[3],[16],[26],[27],[33]
Max PIK Rate		9%	[1],[2],[12],[13],[24],[38]	9%	[3],[16],[26],[27],[33]
Number of Shares \| shares		18,676	[1],[2],[13],[24],[38]	18,296	[3],[16],[26],[27],[33]
Amortized Cost		$ 12,493	[1],[2],[13],[24],[38]	$ 12,493	[3],[16],[26],[27],[33]
Investments, at fair value		$ 9,641	[1],[2],[4],[13],[24],[38]	$ 9,377	[3],[5],[16],[26],[27],[33]
Investment, Identifier [Axis]: Goodnight Water Solutions, LLC, Midstream
Variable Rate		7%	[1],[2],[12],[13]	7.25%	[3],[16]
Floor Rate		0.50%	[1],[2],[12],[13]	0.50%	[3],[16],[19]
Principal Amount		$ 14,925	[1],[2],[13],[20]	$ 14,963	[3],[16],[21]
Amortized Cost		14,720	[1],[2],[13]	14,752	[3],[16]
Investments, at fair value		$ 14,788	[1],[2],[4],[13]	14,819	[3],[5],[16]
Investment, Identifier [Axis]: Great Western Petroleum, LLC
Investments, at fair value				0		58,055
Investment, Identifier [Axis]: Great Western Petroleum, LLC, Common Equity
Investments, at fair value				$ 0		40,731
Investment, Identifier [Axis]: Hamilton Intermediate Holdings, LLC, Power
PIK Rate		16.50%	[1],[2],[12],[13]	16.50%	[3],[16]
Max PIK Rate		16.50%	[1],[2],[12],[13]	16.50%	[3],[16]
Principal Amount		$ 31,655	[1],[2],[13],[20]	$ 30,391	[3],[16],[21]
Amortized Cost		32,281	[1],[2],[13]	31,075	[3],[16]
Investments, at fair value		$ 31,996	[1],[2],[4],[13]	$ 31,007	[3],[5],[16]
Investment, Identifier [Axis]: Hammerhead Resources Inc., Upstream
Variable Rate	[3],[16],[18],[27]			12%
PIK Rate	[1],[2],[12],[13],[15]	12%
Max PIK Rate		12%	[1],[2],[12],[13],[15]	12%	[3],[16],[18],[27]
Principal Amount		$ 37,225	[1],[2],[13],[15],[20]	$ 35,118	[3],[16],[18],[21],[27]
Amortized Cost		37,085	[1],[2],[13],[15]	34,961	[3],[16],[18],[27]
Investments, at fair value		37,225	[1],[2],[4],[13],[15]	35,118	[3],[5],[16],[18],[27]
Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity
Investments, at fair value		$ 810		$ 810		2,836
Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity, Upstream
Number of Shares \| shares		135,062	[1],[2],[13],[24],[36]	135,062	[3],[26],[27],[37]
Amortized Cost		$ 14,553	[1],[2],[13],[24],[36]	$ 15,059	[3],[26],[27],[37]
Investments, at fair value		810	[1],[2],[4],[13],[24],[36]	810	[3],[5],[26],[27],[37]
Investment, Identifier [Axis]: Limetree Bay Energy, LLC
Investments, at fair value				0		3,166
Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units
Investments, at fair value		$ 939		$ 1,885		6,046
Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units, Midstream
Number of Shares \| shares		76,938,973	[1],[2],[13],[24],[36]	76,938,973	[3],[16],[26],[27],[37]
Amortized Cost		$ 21,541	[1],[2],[13],[24],[36]	$ 21,458	[3],[16],[26],[27],[37]
Investments, at fair value		$ 939	[1],[2],[4],[13],[24],[36]	$ 1,885	[3],[5],[16],[26],[27],[37]
Investment, Identifier [Axis]: MB Precision Investment Holdings LLC, Class A-2 Units, Industrials
Number of Shares \| shares	[3],[16],[26],[27],[32]			1,426,110
Amortized Cost	[3],[16],[26],[27],[32]			$ 490
Investments, at fair value	[3],[5],[16],[26],[27],[32]			0
Investment, Identifier [Axis]: MECO IV Holdco, LLC
Investments, at fair value				0		22,745
Investment, Identifier [Axis]: MECO IV Holdco, LLC, Class A-1 Units
Investments, at fair value				$ 0		4,181
Investment, Identifier [Axis]: Maverick Natural Resources, LLC, Common Equity, Upstream
Number of Shares \| shares		503,176	[1],[2],[13],[31]	503,176	[3],[16],[27],[32]
Amortized Cost		$ 138,208	[1],[2],[13],[31]	$ 138,208	[3],[16],[27],[32]
Investments, at fair value		$ 278,760	[1],[2],[4],[13],[31]	$ 312,372	[3],[5],[16],[27],[32]
Investment, Identifier [Axis]: Medallion Midland Acquisition LP, Midstream
Variable Rate	[3]			3.75%
Floor Rate	[3],[19]			0.80%
Principal Amount	[3],[21]			$ 7,920
Amortized Cost	[3]			7,886
Investments, at fair value	[3],[5]			$ 7,862
Investment, Identifier [Axis]: Meritage Midstream Services II, LLC, Midstream
Variable Rate	[1],[2],[12]	6.75%
Floor Rate	[1],[2],[12]	1%
Principal Amount	[1],[2],[13],[20]	$ 25,000
Amortized Cost	[1],[2],[13]	24,511
Investments, at fair value	[1],[2],[4],[13]	$ 24,500
Investment, Identifier [Axis]: Moss Creek Resources, LLC, Upstream
Rate		7.50%	[1],[2],[12]	7.50%	[3],[27]
Principal Amount		$ 11,693	[1],[2],[20]	$ 11,693	[3],[21],[27]
Amortized Cost		10,446	[1],[2]	10,358	[3],[27]
Investments, at fair value		$ 10,856	[1],[2],[4]	$ 10,561	[3],[5],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Preferred Equity, Midstream
Rate		14.20%	[1],[2],[12],[13],[15],[24],[38]	14.20%	[3],[16],[18],[26],[27],[33]
Number of Shares \| shares		156,250	[1],[2],[13],[15],[24],[38]	156,250	[3],[16],[18],[26],[27],[33]
Amortized Cost		$ 157,633	[1],[2],[13],[15],[24],[38]	$ 157,633	[3],[16],[18],[26],[27],[33]
Investments, at fair value		$ 134,138	[1],[2],[4],[13],[15],[24],[38]	$ 125,000	[3],[5],[16],[18],[26],[27],[33]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $13.56, Midstream
Investment, Strike Price \| $ / shares		$ 13.56	[1],[2],[13],[15],[24]	$ 13.56	[3],[16],[18],[26],[27]
Number of Shares \| shares		546,880	[1],[2],[13],[15],[24]	546,880	[3],[16],[18],[26],[27]
Amortized Cost		$ 630	[1],[2],[13],[15],[24]	$ 630	[3],[16],[18],[26],[27]
Investments, at fair value		$ 105	[1],[2],[4],[13],[15],[24]	$ 3	[3],[5],[16],[18],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $14.54, Midstream
Investment, Strike Price \| $ / shares		$ 14.54	[1],[2],[13],[15],[24]	$ 14.54	[3],[16],[18],[26],[27]
Number of Shares \| shares		2,187,500	[1],[2],[13],[15],[24]	2,187,500	[3],[16],[18],[26],[27]
Amortized Cost		$ 3,083	[1],[2],[13],[15],[24]	$ 3,083	[3],[16],[18],[26],[27]
Investments, at fair value		$ 441	[1],[2],[4],[13],[15],[24]	$ 10	[3],[5],[16],[18],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $16.27, Midstream
Investment, Strike Price \| $ / shares		$ 16.27	[1],[2],[13],[15],[24]	$ 16.27	[3],[16],[18],[26],[27]
Number of Shares \| shares		781,250	[1],[2],[13],[15],[24]	781,250	[3],[16],[18],[26],[27]
Amortized Cost		$ 576	[1],[2],[13],[15],[24]	$ 576	[3],[16],[18],[26],[27]
Investments, at fair value		$ 113	[1],[2],[4],[13],[15],[24]	$ 2	[3],[5],[16],[18],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $17.45, Midstream
Investment, Strike Price \| $ / shares		$ 17.45	[1],[2],[13],[15],[24]	$ 17.45	[3],[16],[18],[26],[27]
Number of Shares \| shares		3,125,000	[1],[2],[13],[15],[24]	3,125,000	[3],[16],[18],[26],[27]
Amortized Cost		$ 2,623	[1],[2],[13],[15],[24]	$ 2,623	[3],[16],[18],[26],[27]
Investments, at fair value		$ 449	[1],[2],[4],[13],[15],[24]	$ 8	[3],[5],[16],[18],[26],[27]
Investment, Identifier [Axis]: NRG Energy, Inc., Power
Rate		3.90%	[1],[2],[12],[15]	3.90%	[3],[18]
Principal Amount		$ 16,125	[1],[2],[15],[20]	$ 19,125	[3],[18],[21]
Amortized Cost		15,658	[1],[2],[15]	18,668	[3],[18]
Investments, at fair value		$ 12,917	[1],[2],[4],[15]	$ 14,401	[3],[5],[18]
Investment, Identifier [Axis]: NuStar, Preferred Equity, Midstream
Rate		12.80%	[1],[2],[12],[13],[15]	12.80%	[3],[16],[18],[27]
Number of Shares \| shares		67,011	[1],[2],[13],[15]	2,640,311	[3],[16],[18],[27]
Amortized Cost		$ 73,650	[1],[2],[13],[15]	$ 73,114	[3],[16],[18],[27]
Investments, at fair value		$ 83,272	[1],[2],[4],[13],[15]	$ 83,590	[3],[5],[16],[18],[27]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 1
Variable Rate		5.25%	[1],[2],[12],[13]	5.25%	[3],[16]
Floor Rate		1%	[1],[2],[12],[13]	1%	[3],[16],[19]
Principal Amount		$ 19,108	[1],[2],[13],[20]	$ 18,659	[3],[16],[21]
Amortized Cost		19,034	[1],[2],[13]	18,579	[3],[16]
Investments, at fair value		$ 19,243	[1],[2],[4],[13]	$ 18,847	[3],[5],[16]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 2
Variable Rate		5.25%	[1],[2],[12],[13],[22]	5.25%	[3],[16],[23]
Floor Rate		1%	[1],[2],[12],[13],[22]	1%	[3],[16],[19],[23]
Principal Amount		$ 10,892	[1],[2],[13],[20],[22]	$ 11,341	[3],[16],[21],[23]
Amortized Cost		10,892	[1],[2],[13],[22]	11,341	[3],[16],[23]
Investments, at fair value		$ 10,968	[1],[2],[4],[13],[22]	$ 11,455	[3],[5],[16],[23]
Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, Midstream
Variable Rate		3.25%	[1],[2],[12]	3.25%	[3],[27]
Floor Rate		0.50%	[1],[2],[12]	0.50%	[3],[19],[27]
Principal Amount		$ 26,289	[1],[2],[20]	$ 32,357	[3],[21],[27]
Amortized Cost		26,181	[1],[2]	32,220	[3],[27]
Investments, at fair value		$ 25,885	[1],[2],[4]	$ 32,026	[3],[5],[27]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 1
Variable Rate		4.75%	[1],[2],[12]	4.75%	[3]
Floor Rate		0.80%	[1],[2],[12]	0.80%	[3],[19]
Principal Amount		$ 5,760	[1],[2],[20]	$ 5,760	[3],[21]
Amortized Cost		5,709	[1],[2]	5,708	[3]
Investments, at fair value		$ 5,577	[1],[2],[4]	$ 5,700	[3],[5]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 2
Variable Rate		4.75%	[1],[2],[12]	4.75%	[3]
Floor Rate		0.80%	[1],[2],[12]	0.80%	[3],[19]
Principal Amount		$ 43,800	[1],[2],[20]	$ 43,910	[3],[21]
Amortized Cost		43,415	[1],[2]	43,513	[3]
Investments, at fair value		42,431	[1],[2],[4]	$ 43,285	[3],[5]
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 1
Variable Rate	[3],[16],[27]			6.75%
Floor Rate	[3],[16],[19],[27]			1.50%
Principal Amount	[3],[16],[21],[27]			$ 13,545
Amortized Cost	[3],[16],[27]			13,528
Investments, at fair value	[3],[5],[16],[27]			$ 13,394
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 2
Variable Rate	[3],[16],[23]			6.75%
Floor Rate	[3],[16],[19],[23]			1.50%
Principal Amount	[3],[16],[21],[23]			$ 1,505
Amortized Cost	[3],[16],[23]			1,505
Investments, at fair value	[3],[5],[16],[23]			1,488
Investment, Identifier [Axis]: Permian Production Holdings, LLC
Investments, at fair value		4,791		4,767		7,889
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity
Investments, at fair value		$ 6,103		$ 11,420		8,829
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity, Upstream
Number of Shares \| shares		1,968,861	[1],[2],[13],[24],[31],[36]	1,968,861	[3],[16],[27],[32],[37]
Amortized Cost		$ 5	[1],[2],[13],[24],[31],[36]	$ 5	[3],[16],[27],[32],[37]
Investments, at fair value		$ 6,103	[1],[2],[4],[13],[24],[31],[36]	$ 11,420	[3],[5],[16],[27],[32],[37]
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Upstream
PIK Rate		2%	[1],[2],[12],[13],[36]	2%	[3],[16],[27],[37]
Max PIK Rate		2%	[1],[2],[12],[13],[36]	2%	[3],[16],[27],[37]
Rate		7%	[1],[2],[12],[13],[36]	7%	[3],[16],[27],[37]
Principal Amount		$ 4,791	[1],[2],[13],[20],[36]	$ 4,767	[3],[16],[21],[27],[37]
Amortized Cost		4,322	[1],[2],[13],[36]	4,266	[3],[16],[27],[37]
Investments, at fair value		$ 4,791	[1],[2],[4],[13],[36]	$ 4,767	[3],[5],[16],[27],[37]
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 1
Rate	[3]			7.80%
Principal Amount	[3],[21]			$ 26,365
Amortized Cost	[3]			27,511
Investments, at fair value	[3],[5]			$ 25,703
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 2
Rate	[3],[27]			5.90%
Principal Amount	[3],[21],[27]			$ 5,200
Amortized Cost	[3],[27]			5,257
Investments, at fair value	[3],[5],[27]			$ 4,473
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 1
Variable Rate		6.75%	[1],[2],[12],[13]	6.75%	[3],[16]
Floor Rate		1%	[1],[2],[12],[13]	1%	[3],[16],[19]
Principal Amount		$ 9,370	[1],[2],[13],[20]	$ 9,370	[3],[16],[21]
Amortized Cost		9,308	[1],[2],[13]	9,304	[3],[16]
Investments, at fair value		$ 9,314	[1],[2],[4],[13]	$ 9,310	[3],[5],[16]
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 2
Variable Rate		6.75%	[1],[2],[12],[13],[22]	6.75%	[3],[16],[23]
Floor Rate		1%	[1],[2],[12],[13],[22]	1%	[3],[16],[19],[23]
Principal Amount		$ 2,477	[1],[2],[13],[20],[22]	$ 2,477	[3],[16],[21],[23]
Amortized Cost		2,477	[1],[2],[13],[22]	2,477	[3],[16],[23]
Investments, at fair value		$ 2,462	[1],[2],[4],[13],[22]	$ 2,461	[3],[5],[16],[23]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Letter of Credit, Power
Rate		10%	[1],[2],[12],[13],[22]	10%	[3],[16],[23]
Principal Amount		$ 2,709	[1],[2],[13],[20],[22]	$ 2,709	[3],[16],[21],[23]
Amortized Cost		2,709	[1],[2],[13],[22]	2,709	[3],[16],[23]
Investments, at fair value		$ 0	[1],[2],[4],[13],[22]	$ 0	[3],[5],[16],[23]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 1
PIK Rate		9.50%	[1],[2],[12],[13]	9.50%	[3],[16],[27]
Max PIK Rate		9.50%	[1],[2],[12],[13]	9.50%	[3],[16],[27]
Rate		6%	[1],[2],[12],[13]	6%	[3],[16],[27]
Principal Amount		$ 12,704	[1],[2],[13],[20]	$ 12,121	[3],[16],[21],[27]
Amortized Cost		12,704	[1],[2],[13]	12,121	[3],[16],[27]
Investments, at fair value		$ 9,468	[1],[2],[4],[13]	$ 9,997	[3],[5],[16],[27]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 2
PIK Rate		10%	[1],[2],[12],[13]	10%	[3],[16],[27]
Max PIK Rate		10%	[1],[2],[12],[13]	10%	[3],[16],[27]
Principal Amount		$ 3,827	[1],[2],[13],[20],[38]	$ 3,643	[3],[16],[21],[27]
Amortized Cost		3,827	[1],[2],[13],[38]	3,643	[3],[16],[27]
Investments, at fair value		$ 0	[1],[2],[4],[13],[38]	$ 0	[3],[5],[16],[27]
Investment, Identifier [Axis]: Potomac Energy Center, LLC, Power
Variable Rate		6%	[1],[2],[12],[13]	6%	[3],[16]
Floor Rate		0.50%	[1],[2],[12],[13]	0.50%	[3],[16],[19]
Principal Amount		$ 58,164	[1],[2],[13],[20]	$ 58,459	[3],[16],[21]
Amortized Cost		57,265	[1],[2],[13]	57,508	[3],[16]
Investments, at fair value		56,878	[1],[2],[4],[13]	$ 58,443	[3],[5],[16]
Investment, Identifier [Axis]: Ranger Oil Corp., Upstream
Rate	[3],[18]			9.30%
Principal Amount	[3],[18],[21]			$ 29,772
Amortized Cost	[3],[18]			29,633
Investments, at fair value	[3],[5],[18]			29,678
Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity
Investments, at fair value		$ 0		$ 41,851		48,356
Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity, Upstream
Number of Shares \| shares	[3],[16],[18],[27],[37],[39]			9,599,928
Amortized Cost	[3],[16],[18],[27],[37],[39]			$ 46,599
Investments, at fair value	[3],[5],[16],[18],[27],[37],[39]			$ 41,851
Investment, Identifier [Axis]: ST EIP Holdings Inc., Midstream
Rate		6.30%	[1],[2],[12],[13]	6.30%	[3],[16]
Principal Amount		$ 10,526	[1],[2],[13],[20]	$ 10,526	[3],[16],[21]
Amortized Cost		10,076	[1],[2],[13]	10,064	[3],[16]
Investments, at fair value		$ 10,164	[1],[2],[4],[13]	$ 10,074	[3],[5],[16]
Investment, Identifier [Axis]: Saturn Oil & Gas Inc., Common Equity, Upstream
Number of Shares \| shares	[1],[2],[15],[24],[40]	1,735,283
Amortized Cost	[1],[2],[15],[24],[40]	$ 3,284
Investments, at fair value	[1],[2],[4],[15],[24],[40]	$ 3,220
Investment, Identifier [Axis]: Segreto Power Holdings, LLC, Preferred Equity, Power
Rate		13.10%	[1],[2],[12],[13],[24],[31],[38]	13.10%	[3],[16],[26],[27],[32],[33]
Number of Shares \| shares		70,297	[1],[2],[13],[24],[31],[38]	70,297	[3],[16],[26],[27],[32],[33]
Amortized Cost		$ 99,761	[1],[2],[13],[24],[31],[38]	$ 99,766	[3],[16],[26],[27],[32],[33]
Investments, at fair value		$ 86,037	[1],[2],[4],[13],[24],[31],[38]	$ 83,647	[3],[5],[16],[26],[27],[32],[33]
Investment, Identifier [Axis]: SilverBow Resources, Inc., Upstream
Variable Rate		7.50%	[1],[2],[12],[13],[15]	7.50%	[3],[16],[18],[27]
Floor Rate		1%	[1],[2],[12],[13],[15]	1%	[3],[16],[18],[19],[27]
Principal Amount		$ 14,250	[1],[2],[13],[15],[20]	$ 14,250	[3],[16],[18],[21],[27]
Amortized Cost		14,205	[1],[2],[13],[15]	14,199	[3],[16],[18],[27]
Investments, at fair value		$ 14,297	[1],[2],[4],[13],[15]	$ 14,322	[3],[5],[16],[18],[27]
Investment, Identifier [Axis]: Sitio Royalties Operating Partnership, LP, Upstream
Variable Rate		5.75%	[1],[2],[12],[13],[15]	6.50%	[3],[16],[18],[27]
Floor Rate		1.50%	[1],[2],[12],[13],[15]	1.50%	[3],[16],[18],[19],[27]
Principal Amount		$ 19,000	[1],[2],[13],[15],[20]	$ 19,500	[3],[16],[18],[21],[27]
Amortized Cost		18,835	[1],[2],[13],[15]	19,318	[3],[16],[18],[27]
Investments, at fair value		18,818	[1],[2],[4],[13],[15]	$ 19,256	[3],[5],[16],[18],[27]
Investment, Identifier [Axis]: Suburban Propane Partners LP, Midstream
Rate	[3],[18],[27]			5%
Principal Amount	[3],[18],[21],[27]			$ 7,590
Amortized Cost	[3],[18],[27]			7,837
Investments, at fair value	[3],[5],[18],[27]			6,461
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC 2
Investments, at fair value		52,937		51,098		50,770
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC, Power
Principal Amount		60,603	[1],[2],[13],[15],[20],[24],[30]	60,603	[3],[7],[16],[25]
Amortized Cost		54,514	[1],[2],[13],[15],[24],[30]	54,514	[3],[7],[16],[25]
Investments, at fair value		$ 52,937	[1],[2],[4],[13],[15],[24],[30]	$ 51,098	[3],[5],[7],[16],[25]
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Limited, Common Equity, Service & Equipment
Number of Shares \| shares	[3],[16],[18],[26],[27],[41]			3,750,000
Amortized Cost	[3],[16],[18],[26],[27],[41]			$ 6,029
Investments, at fair value	[3],[5],[16],[18],[26],[27],[41]			$ 3,131
Investment, Identifier [Axis]: Tallgrass Energy Partners, LP, Midstream
Rate		6%	[1],[2],[12]	6%	[3],[27]
Principal Amount		$ 9,761	[1],[2],[20]	$ 19,761	[3],[21],[27]
Amortized Cost		9,580	[1],[2]	19,676	[3],[27]
Investments, at fair value		9,250	[1],[2],[4]	18,480	[3],[5],[27]
Investment, Identifier [Axis]: Telpico, LLC, Common Equity
Investments, at fair value		$ 0		$ 0		0
Investment, Identifier [Axis]: Telpico, LLC, Common Equity, Upstream
Number of Shares \| shares		50	[1],[2],[13],[24],[31],[36]	50	[3],[16],[26],[27],[32],[37]
Amortized Cost		$ 0	[1],[2],[13],[24],[31],[36]	$ 0	[3],[16],[26],[27],[32],[37]
Investments, at fair value		$ 0	[1],[2],[4],[13],[24],[31],[36]	$ 0	[3],[5],[16],[26],[27],[32],[37]
Investment, Identifier [Axis]: Tenrgys, LLC, Common Equity, Upstream
Number of Shares \| shares		50	[1],[2],[13],[24],[31]	50	[3],[16],[26],[27],[32]
Amortized Cost		$ 7,571	[1],[2],[13],[24],[31]	$ 7,571	[3],[16],[26],[27],[32]
Investments, at fair value		$ 5,672	[1],[2],[4],[13],[24],[31]	$ 6,801	[3],[5],[16],[26],[27],[32]
Investment, Identifier [Axis]: Tenrgys, LLC, Upstream
Variable Rate		7.50%	[1],[2],[12],[13]	7.50%	[3],[16],[27]
Max PIK Rate		9.50%	[1],[2],[12],[13]	9.50%	[3],[16],[27]
Floor Rate		1%	[1],[2],[12],[13]	1%	[3],[16],[19],[27]
Principal Amount		$ 20,537	[1],[2],[13],[20]	$ 20,537	[3],[16],[21],[27]
Amortized Cost		20,537	[1],[2],[13]	20,537	[3],[16],[27]
Investments, at fair value		$ 20,691	[1],[2],[4],[13]	$ 20,537	[3],[5],[16],[27]
Investment, Identifier [Axis]: Traverse Midstream Partners LLC, Midstream
Variable Rate	[3]			4.25%
Floor Rate	[3],[19]			1%
Principal Amount	[3],[21]			$ 28,436
Amortized Cost	[3]			28,484
Investments, at fair value	[3],[5]			$ 28,418
Investment, Identifier [Axis]: USA Compression Partners, LP, Common Equity, Midstream
Number of Shares \| shares		84,779	[1],[2],[15]	84,779	[3],[18],[26],[27]
Amortized Cost		$ 1,617	[1],[2],[15]	$ 1,617	[3],[18],[26],[27]
Investments, at fair value		$ 1,791	[1],[2],[4],[15]	$ 1,655	[3],[5],[18],[26],[27]
Investment, Identifier [Axis]: USA Compression Partners, LP, Preferred Equity, Midstream
Rate		9.80%	[1],[2],[12],[13],[15]	9.80%	[3],[16]
Number of Shares \| shares		79,336	[1],[2],[13],[15]	79,336	[3],[16]
Amortized Cost		$ 77,991	[1],[2],[13],[15]	$ 77,943	[3],[16]
Investments, at fair value		$ 92,436	[1],[2],[4],[13],[15]	$ 90,479	[3],[5],[16]
Investment, Identifier [Axis]: USA Compression Partners, LP, Warrants (Premium), Strike: $19.59, Midstream
Investment, Strike Price \| $ / shares		$ 19.59	[1],[2],[13],[15],[24]	$ 19.59	[3],[16],[18],[26],[27]
Number of Shares \| shares		1,586,719	[1],[2],[13],[15],[24]	1,586,719	[3],[16],[18],[26],[27]
Amortized Cost		$ 714	[1],[2],[13],[15],[24]	$ 714	[3],[16],[18],[26],[27]
Investments, at fair value		6,380	[1],[2],[4],[13],[15],[24]	5,711	[3],[5],[16],[18],[26],[27]
Investment, Identifier [Axis]: Warren Resources, Inc.
Investments, at fair value		23,644		23,584		23,688
Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity
Investments, at fair value		$ 29,828		$ 36,982		$ 25,854
Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity, Upstream
Number of Shares \| shares		4,415,749	[1],[2],[13],[24],[30]	4,415,749	[3],[16],[25],[26],[27]
Amortized Cost		$ 20,754	[1],[2],[13],[24],[30]	$ 20,754	[3],[16],[25],[26],[27]
Investments, at fair value		$ 29,828	[1],[2],[4],[13],[24],[30]	$ 36,982	[3],[5],[16],[25],[26],[27]
Investment, Identifier [Axis]: Warren Resources, Inc., Upstream
Variable Rate		9%	[1],[2],[12],[13],[30]	9%	[3],[16],[25]
PIK Rate		1%	[1],[2],[12],[13],[30]	1%	[3],[16],[25]
Max PIK Rate		1%	[1],[2],[12],[13],[30]	1%	[3],[16],[25]
Floor Rate		1%	[1],[2],[12],[13],[30]	1%	[3],[16],[19],[25]
Principal Amount		$ 23,644	[1],[2],[13],[20],[30]	$ 23,584	[3],[16],[21],[25]
Amortized Cost		23,644	[1],[2],[13],[30]	23,584	[3],[16],[25]
Investments, at fair value		$ 23,644	[1],[2],[4],[13],[30]	$ 23,584	[3],[5],[16],[25]
Investment, Identifier [Axis]: Wattbridge Inc., Power
Variable Rate		7.85%	[1],[2],[12],[13]	7.85%	[3],[16]
Floor Rate		1.80%	[1],[2],[12],[13]	1.80%	[3],[16],[19]
Principal Amount		$ 42,252	[1],[2],[13],[20]	$ 42,500	[3],[16],[21]
Amortized Cost		42,252	[1],[2],[13]	42,500	[3],[16]
Investments, at fair value		$ 41,263	[1],[2],[4],[13]	$ 41,880	[3],[5],[16]

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]Security may be an obligation of one or more entities affiliated with the named company.[4]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[6]Includes the effect of swap contracts.[7]Includes the effect of swap contracts.[8]Represents the amounts the Company would pay or receive under each swap contract if it were to settle on March 31, 2023 (see Note 6). March 31, 2023 , the three-month London Interbank Offered Rate, or LIBOR, or L, was 5.19% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.91%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. March 31, 2023 , 76.7% of the Company’s total assets represented qualifying assets. L, was 4.77% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.59%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. Under the 1940 Act, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” of and deemed to “control.” The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Dividend Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 7,782 $ 654 $ — $ — $ — $ 8,436 $ — $ 654 $ — Allied Wireline Services, LLC 46,339 5,808 — — 11,741 63,888 316 5,808 — MECO IV Holdco, LLC 22,745 455 (23,200) — — — — 455 — Warren Resources, Inc. 23,688 237 (341) — — 23,584 2,620 237 — Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 50,770 — — — 328 51,098 — — 735 Equity/Other Allied Wireline Services, LLC, Common Equity — — — — 10,463 10,463 — — — Allied Wireline Services, LLC, Warrants — — — — — — — — — MECO IV Holdco, LLC, Class A-1 Units 4,181 — (18,060) 15,899 (2,020) — — — — Warren Resources, Inc., Common Equity 25,854 — — — 11,128 36,982 — — — $ 181,359 $ 7,154 $ (41,601) $ 15,899 $ 31,640 $ 194,451 $ 2,936 $ 7,154 $ 735 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK and dividend income presented for the year ended December 31, 2022. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 8,436 $ 113 $ (996) $ — $ — $ 7,553 $ 52 $ 113 Allied Wireline Services, LLC 63,888 — — — — 63,888 1,597 — Warren Resources, Inc. 23,584 60 — — — 23,644 810 59 Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 51,098 — — — 1,839 52,937 — — Equity/Other Allied Wireline Services, LLC, Common Equity 10,463 — — — 1,922 12,385 — — Allied Wireline Services, LLC, Warrants — — — — — — — — Warren Resources, Inc., Common Equity 36,982 — — — (7,154) 29,828 — — $ 194,451 $ 173 $ (996) $ — $ (3,393) $ 190,235 $ 2,459 $ 172 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. December 31, 2022 . Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of March 31, 2023, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of March 31, 2023: Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Permian Production Holdings, LLC $ 4,767 $ 56 $ — $ — $ (32) $ 4,791 $ 157 $ 24 Equity/Other GWP Midstream Holdco, LLC, Common Equity 5,044 — — — (1,437) 3,607 — — Harvest Oil & Gas Corp., Common Equity 810 — (506) — 506 810 — — Limetree Bay Energy, LLC, Class A Units 1,885 83 — — (1,029) 939 — — Permian Production Holdings, LLC, Common Equity 11,420 — — — (5,317) 6,103 — — Ridgeback Resources Inc., Common Equity 41,851 — (35,240) (11,359) 4,748 — — — Telpico, LLC, Common Equity — — — — — — — — $ 65,777 $ 139 $ (35,746) $ (11,359) $ (2,561) $ 16,250 $ 157 $ 24 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Fee Income (3) Dividend Income (3) Senior Secured Loans—First Lien Limetree Bay Energy, LLC $ 3,166 $ — $ (1,587) $ (12,756) $ 11,177 $ — $ — $ — $ — $ — Permian Production Holdings, LLC 7,889 697 (3,674) 551 (696) 4,767 570 105 — — Senior Secured Bonds Great Western Petroleum, LLC 58,055 96 (55,096) 1,087 (4,142) — 2,649 — 7,268 — Equity/Other Great Western Petroleum, LLC, Common Equity 40,731 — (84,871) 54,081 (9,941) — — — — — GWP Midstream Holdco, LLC, Common Equity — 6,681 — — (1,637) 5,044 — — — — Harvest Oil & Gas Corp., Common Equity 2,836 — (743) — (1,283) 810 — — — — Limetree Bay Energy, LLC, Class A Units 6,046 1,795 — — (5,956) 1,885 — — — — Permian Production Holdings, LLC, Common Equity 8,829 4 — — 2,587 11,420 — — — 1,726 Ridgeback Resources Inc., Common Equity 48,356 — (12,559) 173 5,881 41,851 — — — 3,691 Telpico, LLC, Common Equity — — — — — — — — — — $ 175,908 $ 9,273 $ (158,530) $ 43,136 $ (4,010) $ 65,777 $ 3,219 $ 105 $ 7,268 $ 5,417 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK, fee and dividend income presented for the year ended December 31, 2022. Investment denominated in Canadian dollars. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 Investment denominated in British pounds. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 .

Consolidated Schedule of Inve_2

Consolidated Schedule of Investments (Parenthetical) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
		Mar. 31, 2023		Mar. 31, 2022	Dec. 31, 2022
Derivative [Line Items]
Qualifying assets, percent of total assets		76.70%			77.50%
Unfunded commitment with amortized cost		$ 2,500			$ 2,500
Investment company, financial commitment fair value		2,500			2,500
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	2,047,115
Net realized gain (loss) on investments:		(20,207)		$ (29,044)
Net change in unrealized appreciation (depreciation) on investments:		(30,473)		215,281
Fair Value, ending balance		1,742,661	[3],[4],[5]		2,047,115	[1],[2]
Paid-in-kind interest income		4,502		5,128
Non-controlled/affiliated
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		65,777		175,908	175,908
Gross Additions		139	[6]		9,273	[7]
Gross Reductions		(35,746)	[8]		(158,530)	[9]
Net realized gain (loss) on investments:		(11,359)		(12,380)	43,136
Net change in unrealized appreciation (depreciation) on investments:		(2,561)		56,051	(4,010)
Fair Value, ending balance		16,250			65,777
Interest Income		157	[10]		3,219	[11]
Paid-in-kind interest income		24	[10]	35	105	[11]
Fee income	[11]				7,268
Dividend income		0		1,726	5,417
Controlled/affiliated
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		194,451		181,359	181,359
Gross Additions		173	[12]		7,154	[13]
Gross Reductions		(996)	[14]		(41,601)	[15]
Net realized gain (loss) on investments:		0			15,899
Net change in unrealized appreciation (depreciation) on investments:		(3,393)		23,727	31,640
Fair Value, ending balance		190,235			194,451
Interest Income		2,459	[16]		2,936	[17]
Paid-in-kind interest income		172	[16]	670	7,154	[17]
Dividend income		$ 0		735	$ 735	[17]
London Interbank Offered Rate (LIBOR)
Derivative [Line Items]
Investment, variable rate		5.19%			4.77%
Secured Overnight Financing Rate
Derivative [Line Items]
Investment, variable rate		4.91%			4.59%
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[19],[20]	$ 23,519
Fair Value, ending balance		23,682	[3],[4],[5],[21],[22],[23]		$ 23,519	[1],[2],[18],[19],[20]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[19],[20],[24]	5,545
Fair Value, ending balance		5,542	[3],[4],[5],[21],[22],[23],[25]		5,545	[1],[2],[18],[19],[20],[24]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Warrants, Strike: $1.00, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[19],[20],[26],[27]	1,630
Fair Value, ending balance		1,381	[3],[4],[5],[21],[22],[23],[28]		1,630	[1],[2],[18],[19],[20],[26],[27]
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	1,219
Fair Value, ending balance		1,313	[3],[4],[5],[21],[28]		1,219	[1],[2],[18],[26],[27]
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	8,321
Fair Value, ending balance		9,175	[3],[4],[5],[21],[28]		8,321	[1],[2],[18],[26],[27]
Investment, Identifier [Axis]: Aethon III BR LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	20,138
Fair Value, ending balance		20,111	[3],[4],[5],[21]		20,138	[1],[2],[18],[27]
Investment, Identifier [Axis]: Aethon United BR LP, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	40,221
Fair Value, ending balance		39,780	[3],[4],[5]		40,221	[1],[2],[27]
Investment, Identifier [Axis]: AirSwift Holdings, Ltd., Common Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[3],[4],[5],[21],[23],[28]	3,413
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[30]	8,436	[29]	7,782	7,782
Gross Additions		113	[12],[29]		654	[13],[30]
Gross Reductions		(996)	[14],[29]		0	[15],[30]
Net realized gain (loss) on investments:		0	[29]		0	[30]
Net change in unrealized appreciation (depreciation) on investments:		0	[29]		0	[30]
Fair Value, ending balance	[29]	7,553			8,436	[30]
Interest Income		52	[16],[29]		0	[17],[30]
Paid-in-kind interest income		113	[16],[29]		654	[17],[30]
Dividend income	[17],[30]				0
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27],[31]	8,436
Fair Value, ending balance		7,553	[3],[4],[5],[21],[32]		8,436	[1],[2],[18],[27],[31]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[24],[31]	2,500
Fair Value, ending balance		2,500	[3],[4],[5],[21],[25],[32]		2,500	[1],[2],[18],[24],[31]
Investment, Identifier [Axis]: Allied Wireline Services, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		63,888		46,339	46,339
Gross Additions		0	[12]		5,808	[13]
Gross Reductions		0	[14]		0	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		0			11,741
Fair Value, ending balance		63,888			63,888
Interest Income		1,597	[16]		316	[17]
Paid-in-kind interest income		0	[16]		5,808	[17]
Dividend income	[17]				0
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		10,463		0	0
Gross Additions		0	[12]		0	[13]
Gross Reductions		0	[14]		0	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		1,922			10,463
Fair Value, ending balance		12,385			10,463
Interest Income		0	[16]		0	[17]
Paid-in-kind interest income		0	[16]		0	[17]
Dividend income	[17]				0
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[31],[33]	10,463
Fair Value, ending balance		12,385	[3],[4],[5],[21],[28],[32],[34]		10,463	[1],[2],[18],[26],[27],[31],[33]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27],[31]	63,888
Fair Value, ending balance		63,888	[3],[4],[5],[21],[32]		63,888	[1],[2],[18],[27],[31]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		0	0
Gross Additions		0	[12]		0	[13]
Gross Reductions		0	[14]		0	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		0			0
Fair Value, ending balance		0			0
Interest Income		0	[16]		0	[17]
Paid-in-kind interest income		0	[16]		0	[17]
Dividend income	[17]				0
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[31],[33]	0
Fair Value, ending balance		0	[3],[4],[5],[21],[28],[32],[34]		0	[1],[2],[18],[26],[27],[31],[33]
Investment, Identifier [Axis]: Archrock Partners, L.P., Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20],[27]	2,840
Fair Value, ending balance	[1],[2],[20],[27]				2,840
Investment, Identifier [Axis]: Arena Energy, LP, Contingent Value Rights, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	858
Fair Value, ending balance		514	[3],[4],[5],[21]		858	[1],[2],[18],[26],[27]
Investment, Identifier [Axis]: Ascent Resources Utica Holdings, LLC, Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33]	52,340
Fair Value, ending balance		40,221	[3],[4],[5],[21],[28],[34]		52,340	[1],[2],[18],[26],[27],[33]
Investment, Identifier [Axis]: Brazos Delaware II LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	39,137
Fair Value, ending balance	[1],[2]				39,137
Investment, Identifier [Axis]: CPV Maryland, LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	14,155
Fair Value, ending balance	[1],[2]				14,155
Investment, Identifier [Axis]: CPV Shore Holdings LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	21,935
Fair Value, ending balance		21,874	[3],[4],[5]		21,935	[1],[2]
Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Common Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	0
Fair Value, ending balance	[1],[2],[18],[26],[27]				0
Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Participation Option, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	0
Fair Value, ending balance	[1],[2],[18],[26],[27]				0
Investment, Identifier [Axis]: Cimarron Energy Inc., Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[35]	3,713
Fair Value, ending balance	[1],[2],[18],[26],[27],[35]				3,713
Investment, Identifier [Axis]: Citizen Energy Operating, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	38,240
Fair Value, ending balance		37,380	[3],[4],[5],[21]		38,240	[1],[2],[18],[27]
Investment, Identifier [Axis]: Compass Power Generation LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	31,384
Fair Value, ending balance		9,777	[3],[4],[5]		31,384	[1],[2]
Investment, Identifier [Axis]: Cox Oil Offshore, LLC, Volumetric Production Payments, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[36],[37]	20,683
Fair Value, ending balance		12,822	[3],[4],[5],[21],[38],[39]		20,683	[1],[2],[18],[36],[37]
Investment, Identifier [Axis]: EIF Van Hook Holdings, LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	26,075
Fair Value, ending balance		26,781	[3],[4],[5]		26,075	[1],[2]
Investment, Identifier [Axis]: ERA II Minerals, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	36,656
Fair Value, ending balance		35,564	[3],[4],[5],[21]		36,656	[1],[2],[18],[27]
Investment, Identifier [Axis]: Earthstone Energy Holdings, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20]	10,920
Fair Value, ending balance		11,073	[3],[4],[5],[23]		10,920	[1],[2],[20]
Investment, Identifier [Axis]: Endeavor Energy Resources, L.P., Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	23,306
Fair Value, ending balance	[1],[2],[27]				23,306
Investment, Identifier [Axis]: FR BR Holdings LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	81,361
Fair Value, ending balance		81,242	[3],[4],[5],[21]		81,361	[1],[2],[18],[27]
Investment, Identifier [Axis]: FR XIII PAA Holdings HoldCo, LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	17,406
Fair Value, ending balance		17,351	[3],[4],[5],[21]		17,406	[1],[2],[18]
Investment, Identifier [Axis]: GIP II Blue Holding LP, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	5,877
Fair Value, ending balance		5,792	[3],[4],[5]		5,877	[1],[2]
Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		5,044		0	0
Gross Additions		0	[6]		6,681	[7]
Gross Reductions		0	[8]		0	[9]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		(1,437)			(1,637)
Fair Value, ending balance		3,607			5,044
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33],[40]	5,044
Fair Value, ending balance		3,607	[3],[4],[5],[21],[28],[34],[41]		5,044	[1],[2],[18],[26],[27],[33],[40]
Investment, Identifier [Axis]: GasLog Ltd., Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20]	14,010
Fair Value, ending balance		14,125	[3],[4],[5],[21],[23]		14,010	[1],[2],[18],[20]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	7,385
Fair Value, ending balance		7,091	[3],[4],[5]		7,385	[1],[2]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	162
Fair Value, ending balance		163	[3],[4],[5]		162	[1],[2]
Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27]	0
Fair Value, ending balance		0	[3],[4],[5],[21],[28]		0	[1],[2],[18],[26],[27]
Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[35]	9,377
Fair Value, ending balance		9,641	[3],[4],[5],[21],[28],[42]		9,377	[1],[2],[18],[26],[27],[35]
Investment, Identifier [Axis]: Goodnight Water Solutions, LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	14,819
Fair Value, ending balance		14,788	[3],[4],[5],[21]		14,819	[1],[2],[18]
Investment, Identifier [Axis]: Great Western Petroleum, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		58,055	58,055
Gross Additions	[7]				96
Gross Reductions	[9]				(55,096)
Net realized gain (loss) on investments:					1,087
Net change in unrealized appreciation (depreciation) on investments:					(4,142)
Fair Value, ending balance					0
Interest Income	[11]				2,649
Paid-in-kind interest income	[11]				0
Fee income	[11]				7,268
Dividend income					0
Investment, Identifier [Axis]: Great Western Petroleum, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		40,731	40,731
Gross Additions	[7]				0
Gross Reductions	[9]				(84,871)
Net realized gain (loss) on investments:					54,081
Net change in unrealized appreciation (depreciation) on investments:					(9,941)
Fair Value, ending balance					0
Interest Income	[11]				0
Paid-in-kind interest income	[11]				0
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Hamilton Intermediate Holdings, LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	31,007
Fair Value, ending balance		31,996	[3],[4],[5],[21]		31,007	[1],[2],[18]
Investment, Identifier [Axis]: Hammerhead Resources Inc., Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[27]	35,118
Fair Value, ending balance		37,225	[3],[4],[5],[21],[23]		35,118	[1],[2],[18],[20],[27]
Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		810		2,836	2,836
Gross Additions		0	[6]		0	[7]
Gross Reductions		(506)	[8]		(743)	[9]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		506			(1,283)
Fair Value, ending balance		810			810
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[26],[27],[40]	810
Fair Value, ending balance		810	[3],[4],[5],[21],[28],[41]		810	[1],[2],[26],[27],[40]
Investment, Identifier [Axis]: Limetree Bay Energy, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		3,166	3,166
Gross Additions	[7]				0
Gross Reductions	[9]				(1,587)
Net realized gain (loss) on investments:					(12,756)
Net change in unrealized appreciation (depreciation) on investments:					11,177
Fair Value, ending balance					0
Interest Income	[11]				0
Paid-in-kind interest income	[11]				0
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,885		6,046	6,046
Gross Additions		83	[6]		1,795	[7]
Gross Reductions		0	[8]		0	[9]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		(1,029)			(5,956)
Fair Value, ending balance		939			1,885
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[40]	1,885
Fair Value, ending balance		939	[3],[4],[5],[21],[28],[41]		1,885	[1],[2],[18],[26],[27],[40]
Investment, Identifier [Axis]: MB Precision Investment Holdings LLC, Class A-2 Units, Industrials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33]	0
Fair Value, ending balance	[1],[2],[18],[26],[27],[33]				0
Investment, Identifier [Axis]: MECO IV Holdco, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		22,745	22,745
Gross Additions	[13]				455
Gross Reductions	[15]				(23,200)
Net realized gain (loss) on investments:					0
Net change in unrealized appreciation (depreciation) on investments:					0
Fair Value, ending balance					0
Interest Income	[17]				0
Paid-in-kind interest income	[17]				455
Dividend income	[17]				0
Investment, Identifier [Axis]: MECO IV Holdco, LLC, Class A-1 Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		4,181	4,181
Gross Additions	[13]				0
Gross Reductions	[15]				(18,060)
Net realized gain (loss) on investments:					15,899
Net change in unrealized appreciation (depreciation) on investments:					(2,020)
Fair Value, ending balance					0
Interest Income	[17]				0
Paid-in-kind interest income	[17]				0
Dividend income	[17]				0
Investment, Identifier [Axis]: Maverick Natural Resources, LLC, Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27],[33]	312,372
Fair Value, ending balance		278,760	[3],[4],[5],[21],[34]		312,372	[1],[2],[18],[27],[33]
Investment, Identifier [Axis]: Medallion Midland Acquisition LP, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	7,862
Fair Value, ending balance	[1],[2]				7,862
Investment, Identifier [Axis]: Meritage Midstream Services II, LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[3],[4],[5],[21]	24,500
Investment, Identifier [Axis]: Moss Creek Resources, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	10,561
Fair Value, ending balance		10,856	[3],[4],[5]		10,561	[1],[2],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Preferred Equity, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27],[35]	125,000
Fair Value, ending balance		134,138	[3],[4],[5],[21],[23],[28],[42]		125,000	[1],[2],[18],[20],[26],[27],[35]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $13.56, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27]	3
Fair Value, ending balance		105	[3],[4],[5],[21],[23],[28]		3	[1],[2],[18],[20],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $14.54, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27]	10
Fair Value, ending balance		441	[3],[4],[5],[21],[23],[28]		10	[1],[2],[18],[20],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $16.27, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27]	2
Fair Value, ending balance		113	[3],[4],[5],[21],[23],[28]		2	[1],[2],[18],[20],[26],[27]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $17.45, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27]	8
Fair Value, ending balance		449	[3],[4],[5],[21],[23],[28]		8	[1],[2],[18],[20],[26],[27]
Investment, Identifier [Axis]: NRG Energy, Inc., Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20]	14,401
Fair Value, ending balance		12,917	[3],[4],[5],[23]		14,401	[1],[2],[20]
Investment, Identifier [Axis]: NuStar, Preferred Equity, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[27]	83,590
Fair Value, ending balance		83,272	[3],[4],[5],[21],[23]		83,590	[1],[2],[18],[20],[27]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	18,847
Fair Value, ending balance		19,243	[3],[4],[5],[21]		18,847	[1],[2],[18]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[24]	11,455
Fair Value, ending balance		10,968	[3],[4],[5],[21],[25]		11,455	[1],[2],[18],[24]
Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	32,026
Fair Value, ending balance		25,885	[3],[4],[5]		32,026	[1],[2],[27]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	5,700
Fair Value, ending balance		5,577	[3],[4],[5]		5,700	[1],[2]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	43,285
Fair Value, ending balance		42,431	[3],[4],[5]		43,285	[1],[2]
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	13,394
Fair Value, ending balance	[1],[2],[18],[27]				13,394
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[24]	1,488
Fair Value, ending balance	[1],[2],[18],[24]				1,488
Investment, Identifier [Axis]: Permian Production Holdings, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		4,767		7,889	7,889
Gross Additions		56	[6]		697	[7]
Gross Reductions		0	[8]		(3,674)	[9]
Net realized gain (loss) on investments:		0			551
Net change in unrealized appreciation (depreciation) on investments:		(32)			(696)
Fair Value, ending balance		4,791			4,767
Interest Income		157	[10]		570	[11]
Paid-in-kind interest income		24	[10]		105	[11]
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		11,420		8,829	8,829
Gross Additions		0	[6]		4	[7]
Gross Reductions		0	[8]		0	[9]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		(5,317)			2,587
Fair Value, ending balance		6,103			11,420
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					1,726
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27],[33],[40]	11,420
Fair Value, ending balance		6,103	[3],[4],[5],[21],[28],[34],[41]		11,420	[1],[2],[18],[27],[33],[40]
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27],[40]	4,767
Fair Value, ending balance		4,791	[3],[4],[5],[21],[41]		4,767	[1],[2],[18],[27],[40]
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	25,703
Fair Value, ending balance	[1],[2]				25,703
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	4,473
Fair Value, ending balance	[1],[2],[27]				4,473
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	9,310
Fair Value, ending balance		9,314	[3],[4],[5],[21]		9,310	[1],[2],[18]
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[24]	2,461
Fair Value, ending balance		2,462	[3],[4],[5],[21],[25]		2,461	[1],[2],[18],[24]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Letter of Credit, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[24]	0
Fair Value, ending balance		0	[3],[4],[5],[21],[25]		0	[1],[2],[18],[24]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	9,997
Fair Value, ending balance		9,468	[3],[4],[5],[21]		9,997	[1],[2],[18],[27]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	0
Fair Value, ending balance		0	[3],[4],[5],[21],[42]		0	[1],[2],[18],[27]
Investment, Identifier [Axis]: Potomac Energy Center, LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	58,443
Fair Value, ending balance		56,878	[3],[4],[5],[21]		58,443	[1],[2],[18]
Investment, Identifier [Axis]: Ranger Oil Corp., Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20]	29,678
Fair Value, ending balance	[1],[2],[20]				29,678
Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		41,851		48,356	48,356
Gross Additions		0	[6]		0	[7]
Gross Reductions		(35,240)	[8]		(12,559)	[9]
Net realized gain (loss) on investments:		(11,359)			173
Net change in unrealized appreciation (depreciation) on investments:		4,748			5,881
Fair Value, ending balance		0			41,851
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					3,691
Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[27],[40],[43]	41,851
Fair Value, ending balance	[1],[2],[18],[20],[27],[40],[43]				41,851
Investment, Identifier [Axis]: ST EIP Holdings Inc., Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	10,074
Fair Value, ending balance		10,164	[3],[4],[5],[21]		10,074	[1],[2],[18]
Investment, Identifier [Axis]: Saturn Oil & Gas Inc., Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[3],[4],[5],[23],[28],[44]	3,220
Investment, Identifier [Axis]: Segreto Power Holdings, LLC, Preferred Equity, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33],[35]	83,647
Fair Value, ending balance		86,037	[3],[4],[5],[21],[28],[34],[42]		83,647	[1],[2],[18],[26],[27],[33],[35]
Investment, Identifier [Axis]: SilverBow Resources, Inc., Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[27]	14,322
Fair Value, ending balance		14,297	[3],[4],[5],[21],[23]		14,322	[1],[2],[18],[20],[27]
Investment, Identifier [Axis]: Sitio Royalties Operating Partnership, LP, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[27]	19,256
Fair Value, ending balance		18,818	[3],[4],[5],[21],[23]		19,256	[1],[2],[18],[20],[27]
Investment, Identifier [Axis]: Suburban Propane Partners LP, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20],[27]	6,461
Fair Value, ending balance	[1],[2],[20],[27]				6,461
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		51,098		50,770	50,770
Gross Additions		0	[12]		0	[13]
Gross Reductions		0	[14]		0	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		1,839			328
Fair Value, ending balance		52,937			51,098
Interest Income		0	[16]		0	[17]
Paid-in-kind interest income		0	[16]		0	[17]
Dividend income	[17]				735
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC, Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[31],[45]	51,098
Fair Value, ending balance		52,937	[3],[4],[5],[21],[23],[28],[32]		51,098	[1],[2],[18],[31],[45]
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Limited, Common Equity, Service & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27],[46]	3,131
Fair Value, ending balance	[1],[2],[18],[20],[26],[27],[46]				3,131
Investment, Identifier [Axis]: Tallgrass Energy Partners, LP, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[27]	18,480
Fair Value, ending balance		9,250	[3],[4],[5]		18,480	[1],[2],[27]
Investment, Identifier [Axis]: Telpico, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0		0	0
Gross Additions		0	[6]		0	[7]
Gross Reductions		0	[8]		0	[9]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		0			0
Fair Value, ending balance		0			0
Interest Income		0	[10]		0	[11]
Paid-in-kind interest income		0	[10]		0	[11]
Fee income	[11]				0
Dividend income					0
Investment, Identifier [Axis]: Telpico, LLC, Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33],[40]	0
Fair Value, ending balance		0	[3],[4],[5],[21],[28],[34],[41]		0	[1],[2],[18],[26],[27],[33],[40]
Investment, Identifier [Axis]: Tenrgys, LLC, Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[33]	6,801
Fair Value, ending balance		5,672	[3],[4],[5],[21],[28],[34]		6,801	[1],[2],[18],[26],[27],[33]
Investment, Identifier [Axis]: Tenrgys, LLC, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[27]	20,537
Fair Value, ending balance		20,691	[3],[4],[5],[21]		20,537	[1],[2],[18],[27]
Investment, Identifier [Axis]: Traverse Midstream Partners LLC, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2]	28,418
Fair Value, ending balance	[1],[2]				28,418
Investment, Identifier [Axis]: USA Compression Partners, LP, Common Equity, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[20],[26],[27]	1,655
Fair Value, ending balance		1,791	[3],[4],[5],[23]		1,655	[1],[2],[20],[26],[27]
Investment, Identifier [Axis]: USA Compression Partners, LP, Preferred Equity, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	90,479
Fair Value, ending balance		92,436	[3],[4],[5],[21],[23]		90,479	[1],[2],[18]
Investment, Identifier [Axis]: USA Compression Partners, LP, Warrants (Premium), Strike: $19.59, Midstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[20],[26],[27]	5,711
Fair Value, ending balance		6,380	[3],[4],[5],[21],[23],[28]		5,711	[1],[2],[18],[20],[26],[27]
Investment, Identifier [Axis]: Warren Resources, Inc.
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		23,584		23,688	23,688
Gross Additions		60	[12]		237	[13]
Gross Reductions		0	[14]		(341)	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		0			0
Fair Value, ending balance		23,644			23,584
Interest Income		810	[16]		2,620	[17]
Paid-in-kind interest income		59	[16]		237	[17]
Dividend income	[17]				0
Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		36,982		$ 25,854	25,854
Gross Additions		0	[12]		0	[13]
Gross Reductions		0	[14]		0	[15]
Net realized gain (loss) on investments:		0			0
Net change in unrealized appreciation (depreciation) on investments:		(7,154)			11,128
Fair Value, ending balance		29,828			36,982
Interest Income		0	[16]		0	[17]
Paid-in-kind interest income		0	[16]		0	[17]
Dividend income	[17]				0
Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity, Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[26],[27],[31]	36,982
Fair Value, ending balance		29,828	[3],[4],[5],[21],[28],[32]		36,982	[1],[2],[18],[26],[27],[31]
Investment, Identifier [Axis]: Warren Resources, Inc., Upstream
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18],[31]	23,584
Fair Value, ending balance		23,644	[3],[4],[5],[21],[32]		23,584	[1],[2],[18],[31]
Investment, Identifier [Axis]: Wattbridge Inc., Power
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[1],[2],[18]	41,880
Fair Value, ending balance		$ 41,263	[3],[4],[5],[21]		$ 41,880	[1],[2],[18]

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[3]Security may be an obligation of one or more entities affiliated with the named company.[4]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[6] (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. March 31, 2023 , 76.7% of the Company’s total assets represented qualifying assets. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Under the 1940 Act, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” of and deemed to “control.” The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Dividend Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 7,782 $ 654 $ — $ — $ — $ 8,436 $ — $ 654 $ — Allied Wireline Services, LLC 46,339 5,808 — — 11,741 63,888 316 5,808 — MECO IV Holdco, LLC 22,745 455 (23,200) — — — — 455 — Warren Resources, Inc. 23,688 237 (341) — — 23,584 2,620 237 — Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 50,770 — — — 328 51,098 — — 735 Equity/Other Allied Wireline Services, LLC, Common Equity — — — — 10,463 10,463 — — — Allied Wireline Services, LLC, Warrants — — — — — — — — — MECO IV Holdco, LLC, Class A-1 Units 4,181 — (18,060) 15,899 (2,020) — — — — Warren Resources, Inc., Common Equity 25,854 — — — 11,128 36,982 — — — $ 181,359 $ 7,154 $ (41,601) $ 15,899 $ 31,640 $ 194,451 $ 2,936 $ 7,154 $ 735 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK and dividend income presented for the year ended December 31, 2022. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 8,436 $ 113 $ (996) $ — $ — $ 7,553 $ 52 $ 113 Allied Wireline Services, LLC 63,888 — — — — 63,888 1,597 — Warren Resources, Inc. 23,584 60 — — — 23,644 810 59 Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 51,098 — — — 1,839 52,937 — — Equity/Other Allied Wireline Services, LLC, Common Equity 10,463 — — — 1,922 12,385 — — Allied Wireline Services, LLC, Warrants — — — — — — — — Warren Resources, Inc., Common Equity 36,982 — — — (7,154) 29,828 — — $ 194,451 $ 173 $ (996) $ — $ (3,393) $ 190,235 $ 2,459 $ 172 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. December 31, 2022 . Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Fee Income (3) Dividend Income (3) Senior Secured Loans—First Lien Limetree Bay Energy, LLC $ 3,166 $ — $ (1,587) $ (12,756) $ 11,177 $ — $ — $ — $ — $ — Permian Production Holdings, LLC 7,889 697 (3,674) 551 (696) 4,767 570 105 — — Senior Secured Bonds Great Western Petroleum, LLC 58,055 96 (55,096) 1,087 (4,142) — 2,649 — 7,268 — Equity/Other Great Western Petroleum, LLC, Common Equity 40,731 — (84,871) 54,081 (9,941) — — — — — GWP Midstream Holdco, LLC, Common Equity — 6,681 — — (1,637) 5,044 — — — — Harvest Oil & Gas Corp., Common Equity 2,836 — (743) — (1,283) 810 — — — — Limetree Bay Energy, LLC, Class A Units 6,046 1,795 — — (5,956) 1,885 — — — — Permian Production Holdings, LLC, Common Equity 8,829 4 — — 2,587 11,420 — — — 1,726 Ridgeback Resources Inc., Common Equity 48,356 — (12,559) 173 5,881 41,851 — — — 3,691 Telpico, LLC, Common Equity — — — — — — — — — — $ 175,908 $ 9,273 $ (158,530) $ 43,136 $ (4,010) $ 65,777 $ 3,219 $ 105 $ 7,268 $ 5,417 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK, fee and dividend income presented for the year ended December 31, 2022. Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of March 31, 2023, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of March 31, 2023: Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Permian Production Holdings, LLC $ 4,767 $ 56 $ — $ — $ (32) $ 4,791 $ 157 $ 24 Equity/Other GWP Midstream Holdco, LLC, Common Equity 5,044 — — — (1,437) 3,607 — — Harvest Oil & Gas Corp., Common Equity 810 — (506) — 506 810 — — Limetree Bay Energy, LLC, Class A Units 1,885 83 — — (1,029) 939 — — Permian Production Holdings, LLC, Common Equity 11,420 — — — (5,317) 6,103 — — Ridgeback Resources Inc., Common Equity 41,851 — (35,240) (11,359) 4,748 — — — Telpico, LLC, Common Equity — — — — — — — — $ 65,777 $ 139 $ (35,746) $ (11,359) $ (2,561) $ 16,250 $ 157 $ 24 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. Investment denominated in Canadian dollars. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 Investment denominated in British pounds. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 .

Principal Business and Organiza

Principal Business and Organization	3 Months Ended
Principal Business and Organization	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principal Business and Organization	Principal Business and Organization FS Energy and Power Fund, or the Company, was formed as a Delaware statutory trust under the Delaware Statutory Trust Act on September 16, 2010 and formally commenced investment operations on July 18, 2011. The Company is an externally managed, non-diversified, closed-end management investment company that has elected to be regulated as a business development company, or BDC, under the Investment Company Act of 1940, as amended, or the 1940 Act. In addition, the Company has elected to be treated for U.S. federal income tax purposes, and intends to qualify annually, as a regulated investment company, or RIC, as defined under Subchapter M of the Internal Revenue Code of 1986, as amended, or the Code. The Company has various wholly-owned financing subsidiaries, including special-purpose financing subsidiaries and subsidiaries through which it holds or expects to hold interests in certain portfolio companies. The unaudited consolidated financial statements include both the Company’s accounts and the accounts of its wholly-owned subsidiaries as of March 31, 2023 . All significant intercompany transactions have been eliminated in consolidation. Certain of the Company’s consolidated subsidiaries are subject to U.S. federal and state income taxes. The Company’s investment objective is to generate current income and long-term capital appreciation by investing primarily in privately-held U.S. companies in the energy and power industry. The Company’s investment policy is to invest, under normal circumstances, at least 80% of its total assets in securities of energy and power related, or Energy, companies. The Company considers Energy companies to be those companies that engage in the exploration, development, production, gathering, transportation, processing, storage, refining, distribution, mining, generation or marketing of natural gas, natural gas liquids, crude oil, refined products, coal or power, including those companies that provide equipment or services to companies engaged in any of the foregoing. The Company’s board of trustees has approved changing the Company’s name to FS Specialty Lending Fund and changing its non-fundamental investment policy to be to invest primarily in a portfolio of secured and unsecured floating and fixed rate loans, bonds and other types of credit instruments, which, under normal circumstances, will represent at least 80% of the Fund’s total assets, rather than to invest at least 80% of its total assets in securities of Energy companies. The Company is managed by FS/EIG Advisor, LLC, or FS/EIG Advisor, pursuant to an investment advisory and administrative services agreement, dated as of April 9, 2018, or the FS/EIG investment advisory agreement. FS/EIG Advisor oversees the management of the Company’s operations and is responsible for making investment decisions with respect to the Company’s portfolio. FS/EIG Advisor is jointly operated by an affiliate of Franklin Square Holdings, L.P. (which does business as FS Investments) and EIG Asset Management, LLC, or EIG.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation: The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. For a more complete discussion of significant accounting policies and certain other information, the Company’s interim unaudited consolidated financial statements should be read in conjunction with its audited consolidated financial statements as of and for the year ended December 31, 2022 included in the Company’s annual report on Form 10-K. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The December 31, 2022 consolidated balance sheet and consolidated schedule of investments are derived from the Company's audited consolidated financial statements as of and for the year ended December 31, 2022. The Company is considered an investment company under GAAP and follows the accounting and reporting guidance applicable to investment companies under Accounting Standards Codification Topic 946, Financial Services—Investment Companies. The Company has evaluated the impact of subsequent events through the date the unaudited consolidated financial statements were issued and filed with the Securities and Exchange Commission, or the SEC. Use of Estimates: The preparation of the unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Many of the amounts have been rounded, and all amounts are in thousands, except share and per share amounts. Capital Gains Incentive Fee: Pursuant to the terms of the FS/EIG investment advisory agreement, the incentive fee on capital gains is determined and payable in arrears as of the end of each calendar year (or upon termination of such agreement). Such fee equals 20.0% of the Company’s “incentive fee capital gains,” which are the Company’s realized capital gains on a cumulative basis from inception, calculated as of the end of the applicable period, computed net of all realized capital losses and unrealized capital depreciation on a cumulative basis, less the aggregate amount of any previously paid incentive fees on capital gains. The Company will accrue for the incentive fee on capital gains, which, if earned, will be paid annually. The Company will accrue the incentive fee on capital gains based on net realized and unrealized gains; however, the fee payable to FS/EIG Advisor will be based on realized gains and no such fee will be payable with respect to unrealized gains unless and until such gains are actually realized. For the three months ended March 31, 2023 and 2022, the Company did not accrue any amount of capital gains incentive fee. Subordinated Income Incentive Fee: Pursuant to the terms of the FS/EIG investment advisory agreement, FS/EIG Advisor may also be entitled to receive a subordinated incentive fee on income. The subordinated incentive fee on income under the FS/EIG investment advisory agreement is calculated and payable quarterly in arrears and equals 20.0% of the Company’s “pre-incentive fee net investment income” for the immediately preceding quarter subject to a hurdle rate, expressed as a rate of return on adjusted capital, equal to 1.625% per quarter, or an annualized hurdle rate of 6.5%. As a result, FS/EIG Advisor will not earn this incentive fee for any quarter until the Company’s pre-incentive fee net investment income for such quarter exceeds the hurdle rate of 1.625%. For purposes of this fee, “adjusted capital” means cumulative gross proceeds generated from sales of the Company’s common shares (including proceeds from its distribution reinvestment plan) reduced for distributions from non-liquidating dispositions of the Company’s investments paid to shareholders and amounts paid for share repurchases pursuant to the Company’s share repurchase program. Once the Company’s pre-incentive fee net investment income in any quarter exceeds the hurdle rate, FS/EIG Advisor will be entitled to a “catch-up” fee equal to the amount of the Company’s pre-incentive fee net investment income in excess of the hurdle rate, until the Company’s pre-incentive fee net investment income for such quarter equals 2.031%, or 8.125% annually, of adjusted capital. This “catch-up” feature will allow FS/EIG Advisor to recoup the fees foregone as a result of the existence of the hurdle rate. Thereafter, FS/EIG Advisor will be entitled to receive 20.0% of the Company’s pre-incentive fee net investment income. For the three months ended March 31, 2023 and 2022, the Company did not accrue any amount of subordinated incentive fee on income. Reclassifications: Certain amounts in the unaudited consolidated financial statements for the three months ended March 31, 2022 may have been reclassified to conform to the classifications used to prepare the unaudited consolidated financial statements for the three months ended March 31, 2023. Revenue Recognition: Security transactions are accounted for on the trade date. The Company records interest income on an accrual basis to the extent that it expects to collect such amounts. The Company records dividend income on the ex-dividend date. Distributions received from limited liability company, or LLC, and limited partnership, or LP, investments are evaluated to determine if the distribution should be recorded as dividend income or a return of capital. The Company does not accrue as a receivable interest or dividends on loans and securities if it has reason to doubt its ability to collect such income. The Company’s policy is to place investments on non-accrual status when there is reasonable doubt that interest income will be collected. The Company considers many factors relevant to an investment when placing it on or removing it from non-accrual status including, but not limited to, the delinquency status of the investment, economic and business conditions, the overall financial condition of the underlying investment, the value of the underlying collateral, bankruptcy status, if any, and any other facts or circumstances relevant to the investment. If there is reasonable doubt that the Company will receive any previously accrued interest, then the accrued interest will be written-off. Payments received on non-accrual investments may be recognized as income or applied to principal depending upon the collectability of the remaining principal and interest. Non-accrual investments may be restored to accrual status when principal and interest become current and are likely to remain current based on the Company’s judgment. Loan origination fees, original issue discount and market discount are capitalized and the Company amortizes such amounts as interest income over the respective term of the loan or security. Upon the prepayment of a loan or security, any unamortized loan origination fees and original issue discount are recorded as interest income. Structuring and other non-recurring upfront fees are recorded as fee income when earned. The Company records prepayment premiums on loans and securities as fee income when it earns such amounts. For the three months ended March 31, 2023 and 2022, the Company did not recognize any structuring or other upfront fee revenue. Net Realized Gains or Realized Losses on Extinguishment of Debt: Upon the repayment of debt obligations which are deemed to be extinguishments, the difference between the principal amount due at maturity and the amount repaid on the extinguishment of debt is recognized as a gain or loss. Recent Accounting Pronouncements: In March 2020, the FASB issued Accounting Standards Update No. 2020-04, Reference Rate Reform (Topic 848) , or ASU 2020-04, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The a mendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. In January 2021, the FASB issued Accounting Standards Update No. 2021-01, Reference Rate Reform (Topic 848) , or ASU 2021-01, which expanded the scope of Topic 848 to include derivative instruments impacted by discounting transition. ASU 2020-04 and ASU 2021-01 are effective for all entities through December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications and hedging relationships entered into or evaluated after December 31, 2022, except for hedging transactions as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. In December 2022, the FASB issued Accounting Standards Update No. 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 , or ASU 2022-06, which deferred the sunset date of this guidance to December 31, 2024. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Share Transactions

Share Transactions	3 Months Ended
Share Transactions	Mar. 31, 2023
Equity [Abstract]
Share Transactions	Share Transactions Below is a summary of transactions with respect to the Company’s common shares during the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Shares Amount Shares Amount Reinvestment of Distributions 1,321,335 $ 5,218 1,434,432 $ 5,235 Proceeds from Share Transactions 1,321,335 $ 5,218 1,434,432 $ 5,235 During the period fro m April 1, 2023 to May 1, 2023, the Company issued 1,342,539 common shares pursuant to its distribution reinvestment plan for gross proceeds of $5,170 at an average price per share of $3.85. On February 25, 2020, the Company received exemptive relief from the SEC permitting it to offer multiple classes of common shares. While the Company has no present intention to recommence a public offering of its common shares, the Company could do so in the future. Share Repurchase Program In March 2020, in light of difficult market conditions and in an effort to preserve liquidity in the Company, the Company’s board of trustees determined to suspend for an indefinite period of time the Company’s share repurchase program and will reassess the Company’s ability to recommence such program in future periods. Prior to its suspension, the Company intended to conduct quarterly tender offers pursuant to its share repurchase program. The Company's board of trustees will consider the following factors, among others, in making its determination regarding whether to cause the Company to offer to repurchase common shares and under what terms: • the effect of such repurchases on the Company’s qualification as a RIC (including the consequences of any necessary asset sales); • the liquidity of the Company's assets (including fees and costs associated with disposing of assets); • the Company’s investment plans and working capital requirements; • the relative economies of scale with respect to the Company’s size; • the Company’s history in repurchasing common shares or portions thereof; and • the condition of the securities markets. Historically, the Company limited the number of common shares to be repurchased during any calendar year to the lesser of (i) the number of common shares the Company can repurchase with the proceeds it receives from the issuance of common shares under the Company’s distribution reinvestment plan and (ii) 10% of the weighted average number of common shares outstanding in the prior calendar year, or 2.5% in each calendar quarter. On May 5, 2017, the board of trustees of the Company further amended the share repurchase program. As amended, the Company will limit the maximum number of common shares to be repurchased for any repurchase offer to the greater of (A) the number of common shares that the Company can repurchase with the proceeds it has received from the sale of common shares under its distribution reinvestment plan during the twelve-month period ending on the date the applicable repurchase offer expires (less the amount of proceeds used to repurchase common shares on each previous repurchase date for repurchase offers conducted during such twelve-month period) (this limitation is referred to as the twelve-month repurchase limitation) and (B) the number of common shares that the Company can repurchase with the proceeds the Company receives from the sale of common shares under its distribution reinvestment plan during the three-month period ending on the date the applicable repurchase offer expires (this limitation is referred to as the three-month repurchase limitation). In addition to this limitation, the maximum number of common shares to be repurchased for any repurchase offer will also be limited to 10% of the weighted average number of common shares outstanding in the prior calendar year, or 2.5% in each calendar quarter. As a result, the maximum number of common shares to be repurchased for any repurchase offer will not exceed the lesser of (i) 10% of the weighted average number of common shares outstanding in the prior calendar year, or 2.5% in each calendar quarter, and (ii) whichever is greater of the twelve-month repurchase limitation described in clause (A) above and the three-month repurchase limitation described in clause (B) above. If the Company recommences its share repurchase program, the Company intends to offer to repurchase common shares at a price equal to the price at which common shares are issued pursuant to the Company’s distribution reinvestment plan on the distribution date coinciding with the applicable share repurchase date. The price at which common shares are issued under the Company’s distribution reinvestment plan is determined by the Company’s board of trustees or a committee thereof, in its sole discretion, and will be (i) not less than the net asset value per common share as determined in good faith by the Company’s board of trustees or a committee thereof, in its sole discretion, immediately prior to the payment date of the distribution and (ii) not more than 2.5% greater than the net asset value per common share as of such date. The Company’s board of trustees may amend, suspend or terminate the share repurchase program at any time, upon 30 days’ notice. The Company did not repurchase any shares pursuant to its share repurchase program during the three months ended March 31, 2023 and 2022. In order to minimize the expense of supporting small accounts and provide additional liquidity to shareholders of the Company holding small accounts after completion of a regular quarterly share repurchase offer, the Company reserves the right to repurchase the shares of and liquidate any investor’s account if the balance of such account is less than the Company’s $5 minimum initial investment, unless the account balance has fallen below the minimum solely as a result of a decline in the Company’s net asset value per share. The Company will provide or will cause to be provided 30 days’ prior written notice to potentially affected investors, which notice may be included in regular quarterly repurchase offer materials, of any such repurchase. Any such repurchases will be made at the Company’s most recent price at which the Company’s shares were issued pursuant to its distribution reinvestment plan. There were no de minimis account liquidations during the three months ended March 31, 2023 and 2022.

Related Party Transactions

Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2023
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Compensation of the Investment Adviser Pursuant to the FS/EIG investment advisory agreement, FS/EIG Advisor is entitled to an annual base management fee based on the average weekly value of the Company’s gross assets (gross assets equals total assets as set forth on the Company’s consolidated balance sheets) during the most recently completed calendar quarter and an incentive fee based on the Company’s performance. The base management fee is payable quarterly in arrears, and is calculated at an annual rate of 1.75% of the average weekly value of the Company’s gross assets. See Note 2 for a discussion of the capital gains and subordinated income incentive fees that FS/EIG Advisor may be entitled to under the FS/EIG investment advisory agreement. FS/EIG Advisor may receive structuring or other upfront fees from portfolio companies in which FS/EIG Advisor has caused the Company to invest. FS/EIG Advisor has agreed to offset the amount of any structuring, upfront or certain other fees received by FS/EIG Advisor or its members against the management fees payable by the Company under the FS/EIG investment advisory agreement. During the three months ended March 31, 2023 and 2022, $255 and $698, respectively, of structuring, upfront or certain other fees received by FS/EIG Advisor or its members were offset against management fees. Pursuant to the FS/EIG investment advisory agreement, FS/EIG Advisor oversees the Company’s day-to-day operations, including the provision of general ledger accounting, fund accounting, legal services, investor relations, certain government and regulatory affairs activities and other administrative services. FS/EIG Advisor also performs, or oversees the performance of, the Company’s corporate operations and required administrative services, which includes being responsible for the financial records that the Company is required to maintain and preparing reports for the Company’s shareholders and reports filed with the SEC. The Company reimburses FS/EIG Advisor for expenses necessary to perform services related to the Company’s administration and operations, including FS/EIG Advisor’s allocable portion of the compensation and/or related expenses of certain personnel of FS Investments and EIG providing administrative services to the Company on behalf of FS/EIG Advisor, and for transactional expenses for prospective investments, such as fees and expenses associated with performing due diligence reviews of investments that do not close, often referred to as “broken deal” costs. The Company reimburses FS/EIG Advisor no less than quarterly for expenses necessary to perform services related to the Company’s administration and operations. The amount of this reimbursement is set at the lesser of (1) FS/EIG Advisor’s actual costs incurred in providing such services and (2) the amount that the Company estimates it would be required to pay alternative service providers for comparable services in the same geographic location. FS/EIG Advisor allocates the cost of such services to the Company based on factors such as time allocations and other reasonable metrics. The Company’s board of trustees reviews the methodology employed in determining how the expenses are allocated to the Company and assesses the reasonableness of such reimbursements for expenses allocated to the Company based on the breadth, depth and quality of such services as compared to the estimated cost to the Company of obtaining similar services from third-party providers known to be available. In addition, the Company’s board of trustees considers whether any single third-party service provider would be capable of providing all such services at comparable cost and quality. Finally, the Company’s board of trustees, among other things, compares the total amount paid to FS/EIG Advisor for such services as a percentage of the Company’s net assets to the same ratio as reported by other comparable BDC s. The Company does not reimburse FS/EIG Advisor for any services for which it receives a separate fee, or for rent, depreciation, utilities, capital equipment or other administrative items allocated to a controlling person of FS/EIG Advisor. The following table describes the fees and expenses accrued under the FS/EIG investment advisory agreement during the three months ended March 31, 2023 and 2022: Three Months Ended Related Party Source Agreement Description 2023 2022 FS/EIG Advisor FS/EIG investment advisory agreement Base Management Fee (1) $ 10,219 $ 10,037 FS/EIG Advisor FS/EIG investment advisory agreement Administrative Services Expenses (2) $ 1,320 $ 1,420 _________________________ (1) During the three months ended March 31, 2023 and 2022, $11,185 and $10,466, respectively, in base management fees were paid to FS/EIG Advisor. The base management fee amount shown in the table above is shown net of $255 and $698 in structuring, upfront or certain other fees received by FS/EIG Advisor or its members and offset against base management fees for the three months ended March 31, 2023 and 2022, respectively. As of March 31, 2023 , $10,219 in base management fees were payable to FS/EIG Advisor. (2) During the three months ended March 31, 2023 and 2022, $645 and $638, respectively, of the accrued administrative services expenses related to the allocation of costs of administrative personnel for services rendered to the Company by FS/EIG Advisor and the remainder related to other reimbursable expenses. The Company paid $1,458 and $1,121 in administrative services expenses to FS/EIG Advisor, or its affiliates, during the three months ended March 31, 2023 and 2022, respectively. Potential Conflicts of Interest The members of the senior management and investment teams of FS/EIG Advisor serve or may serve as officers, directors or principals of entities that operate in the same or a related line of business as the Company does, or of investment vehicles managed by the same personnel. The officers, managers and other personnel of FS/EIG Advisor may serve in similar or other capacities for the investment advisers to future investment vehicles affiliated with FS Investments or EIG. In serving in these multiple and other capacities, they may have obligations to other clients or investors in those entities, the fulfillment of which may not be in the Company’s best interests or in the best interest of the Company’s shareholders. The Company’s investment objectives may overlap with the investment objectives of such investment funds, accounts or other investment vehicles. For additional information regarding potential conflicts of interest, see the Company’s annual report on Form 10-K for the year ended December 31, 2022. Exemptive Relief As a BDC, the Company is subject to certain regulatory restrictions in making its investments. For example, BDCs generally are not permitted to co-invest with certain affiliated entities in transactions originated by the BDC or its affiliates in the absence of an exemptive order from the SEC. However, BDCs are permitted to, and may, simultaneously co-invest in transactions where price is the only negotiated term. In an order dated June 4, 2013, or the Order, the SEC granted exemptive relief permitting the Company, subject to the satisfaction of certain conditions, to co-invest in certain privately negotiated investment transactions with certain affiliates of its former investment adviser, including FS KKR Capital Corp., or collectively the Company’s co-investment affiliates. Effective April 9, 2018, or the JV Effective Date, and in connection with the transition of advisory services to a joint advisory relationship with EIG, the Company’s board of trustees authorized and directed that the Company (i) withdraw from the Order, except with respect to any transaction in which the Company participated in reliance on the Order prior to the JV Effective Date, and (ii) rely on an exemptive relief order dated April 10, 2018, granted to EIG and its affiliates which permits the Company to participate in co-investment transactions with certain other EIG advised funds, or the EIG Order.

Distributions

Distributions	3 Months Ended
Distributions	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Distributions	Distributions The following table reflects the cash distributions per share that the Company declared on its common shares during the three months ended March 31, 2023 and 2022: Distribution For the Three Months Ended Per Share Amount Fiscal 2022 March 31, 2022 $ 0.03 $ 13,426 Fiscal 2023 March 31, 2023 $ 0.03 $ 13,584 Although the Company's board of trustees has not declared or resumed regular cash distributions to shareholders for any period after March 31, 2020, the Company's board of trustees has since declared three cash distributions in 2020, four cash distributions in 2021, four cash distributions in 2022 and one cash distribution in 2023, each in the amount of $0.03 per share. FS/EIG Advisor and the Company’s board of trustees expect that future regular cash distributions to shareholders will remain suspended until such time that the Company’s board of trustees and FS/EIG Advisor believe that market conditions and the financial condition of the Company support the resumption of such distributions. The Company's board of trustees has and will continue to evaluate the Company's ability to pay any distributions in the future. There can be no assurance that the Company will be able to pay distributions in the future. The timing and amount of any future distributions to shareholders are subject to applicable legal restrictions and the sole discretion of the Company’s board of trustees. Furthermore, prior to its termination, the JPMorgan Facility restricted the ability of the Company to make certain discretionary cash dividends and distributions and other restricted payments. See Note 9 for a discussion of the JPMorgan Facility. The Company has adopted an “opt in” distribution reinvestment plan for its shareholders. As a result, if the Company makes a cash distribution, its shareholders will receive distributions in cash unless they specifically “opt in” to the distribution reinvestment plan so as to have their cash distributions reinvested in additional common shares. However, certain state authorities or regulators may impose restrictions from time to time that may prevent or limit a shareholder's ability to participate in the distribution reinvestment plan. Under the distribution reinvestment plan, cash distributions to participating shareholders will be reinvested in additional common shares at a purchase price determined by the Company’s board of trustees, or a committee thereof, in its sole discretion, that is (i) not less than the net asset value per common share as determined in good faith by the Company’s board of trustees or a committee thereof, in its sole discretion, immediately prior to the payment of the distribution and (ii) not more than 2.5% greater than the net asset value per common share as of such date. Any distributions reinvested under the plan will remain taxable to a U.S. shareholder. The Company may fund its cash distributions to shareholders from any sources of funds legally available to it, including proceeds from the sale of the Company’s common shares, borrowings, net investment income from operations, capital gains proceeds from the sale of assets and non-capital gains proceeds from the sale of assets, dividends or other distributions paid to the Company on account of preferred and common equity investments in portfolio companies. The Company has not established limits on the amount of funds it may use from available sources to make distributions. The Company's distribution proceeds have exceeded and in the future may exceed its earnings. Therefore, portions of the distributions that the Company has made represented, and may make in the future may represent, a return of capital to shareholders, which lowers their tax basis in their common shares. A return of capital generally is a return of a shareholder’s investment rather than a return of earnings or gains derived from the Company’s investment activities. Each year a statement on Form 1099-DIV identifying the sources of the distributions (i.e., paid from ordinary income, paid from net capital gains on the sale of securities, and/or a return of capital, which is a nontaxable distribution) will be mailed to the Company’s shareholders. There can be no assurance that the Company will be able to pay distributions at a specific rate or at all. The following table reflects the sources of the cash distributions on a tax basis that the Company declared on its common shares during the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Source of Distribution Distribution Amount Percentage Distribution Amount Percentage Net investment income (1) $ 13,584 100 % $ 13,426 100 % Short-term capital gains proceeds from the sale of assets — — — — Long-term capital gains proceeds from the sale of assets — — — — Total $ 13,584 100 % $ 13,426 100 % _________________________ (1) During the three months ended March 31, 2023 and 2022, 86.6% and 80.1%, respectively, of the Company's gross investment income was attributable to cash income earned, 10.5% and 14.3%, respectively, was attributable to paid-in-kind, or PIK, interest and 2.9% and 5.6%, respectively, was attributable to non-cash accretion of discount. In the past, the Company has experienced restructurings and defaults and may experience such events again in the future. Any restructuring or default may have an impact on the level of income received by the Company. The determination of the tax attributes of the Company’s distributions is made annually as of the end of the Company’s fiscal year based upon the Company’s taxable income for the full year and distributions paid for the full year. Therefore, a determination made on a quarterly basis may not be representative of the actual tax attributes of the Company's distributions for a full year. The actual tax characteristics of distributions to shareholders are reported to shareholders annually on Form 1099-DIV. Net capital losses may be carried forward indefinitely, and their character is retained as short-term or long-term. As of March 31, 2023, the Company had short-term and long-term capital loss carryforwards available to offset future realized capital gains of $69,270 and $1,248,683, respectively. As of March 31, 2023 and December 31, 2022, for federal income tax purposes, the gross unrealized appreciation on the Company’s investments, swap contracts and unrealized gain on foreign currency was $276,302 and $334,635, respectively, and the gross unrealized depreciation on the Company’s investments, swap contracts and unrealized loss on foreign currency was $471,400 and $512,206, respectively. The aggregate cost of the Company’s investments for federal income tax purposes totaled $1,938,093 and $2,223,943 as of March 31, 2023 and December 31, 2022, respectively. The aggregate net unrealized appreciation (depreciation) on a tax basis was $(195,432) and $(176,828) as of March 31, 2023 and December 31, 2022, respectively. As of March 31, 2023 and December 31, 2022, the Company had deferred tax assets of $145,397 and $145,383, respectively, resulting from interest expense disallowance, net operating losses and capital losses of the Company's wholly-owned taxable subsidiaries. As of March 31, 2023 and December 31, 2022, the Company had deferred tax liabilities of $19,413 and $28,753, respectively, resulting from unrealized appreciation on investments held by the Company's wholly-owned taxable subsidiaries. As of March 31, 2023 and December 31, 2022, certain wholly-owned taxable subsidiaries anticipated that they would be unable to fully utilize their deferred tax assets, therefore the deferred tax assets were offset by valuation allowances of $125,984 and $116,630, respectively. For the three months ended March 31, 2023, the Company did not record a provision for taxes related to its wholly-owned taxable subsidiaries. For the year ended December 31, 2022, the Company recorded a provision for taxes related to its wholly-owned taxable subsidiaries of $1,207 related to current taxes.

Financial Instruments

Financial Instruments	3 Months Ended
Financial Instruments	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	Financial Instruments The Company may trade in financial instruments with off-balance sheet risk in the normal course of its investing activities. During the three months ended March 31, 2023, the Company utilized swap contracts to economically hedge certain risks against natural gas and crude oil price exposure related to certain investments in the Company's portfolio. While the use of these derivative instruments limits the downside risk of adverse price movements, their use also limits future revenues from upward price movements. The Company's fixed price swaps are settled monthly based on differences between the fixed price specified in the contract and the referenced settlement price. When the referenced settlement price is less than the price specified in the contract, the Company receives an amount from the counterparty based on the price difference multiplied by the volume. Similarly, when the referenced settlement price exceeds the price specified in the contract, the Company pays the counterparty an amount based on the price difference multiplied by the volume. The prices contained in these fixed price swaps are based on the NYMEX Henry Hub for natural gas and the ICE Brent for oil. Gas volumes are measured in one million British thermal units, or MMBtus, and oil volumes are measured in barrels, or Bbls. Below is a summary of the Company's open fixed price swap positions as of March 31, 2023. The hedged volumes reflected below represent an aggregation of multiple derivative contracts that have varying durations and may not be realized on a ratable basis over a calendar year. Swap Contracts—Crude Oil Year Settlement Index Bbls Weighted Average Price 2023 ICE Brent 123,680 $80.00 Swap Contracts—Natural Gas Year Settlement Index MMBtu Weighted Average Price 2023 NYMEX Henry Hub 227,542 $3.80 During the three months ended March 31, 2023, the average monthly notional volume of fixed price swap contracts—crude oil and fixed price swap contracts—natural gas outstanding were 153,486 Bbls and 285,889 MMBtus, respectively. The following table presents the fair value of open swap contracts (which are not considered to be hedging instruments for accounting disclosure purposes) as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Instrument Asset (1) Liability (2) Asset (1) Liability (2) Swap Contracts—Crude Oil $ 161 $ — $ — $ (572) Swap Contracts—Natural Gas 218 — — (126) Total $ 379 $ — $ — $ (698) ______________ (1) Reflected on the Company's consolidated balance sheets as: Unrealized appreciation on swap contracts. (2) Reflected on the Company's consolidated balance sheets as: Unrealized depreciation on swap contracts. The effect of swap contracts (which are not considered to be hedging instruments for accounting disclosure purposes) on the Company's statements of operations for the three months ended March 31, 2023 and 2022 was as follows: Net Realized Gains (Losses) (1) Net Change in Unrealized (2) Three Months Ended Three Months Ended Instrument 2023 2022 2023 2022 Swap Contracts—Crude Oil $ (100) $ (392) $ 733 $ (2,976) Swap Contracts—Natural Gas 112 (24) 344 (506) Total $ 12 $ (416) $ 1,077 $ (3,482) ______________ (1) Reflected on the Company's consolidated statements of operations as: Net realized gain (loss) on swap contracts. (2) Reflected on the Company's consolidated statements of operations as: Net change in unrealized appreciation (depreciation) on swap contracts. Offsetting of Derivative Instruments The Company has derivative instruments that are subject to master netting agreements. These agreements include provisions to offset positions with the same counterparty in the event of default by one of the parties. The Company’s unrealized appreciation and depreciation on derivative instruments are reported as gross assets and liabilities, respectively, in the consolidated balance sheets. The following tables present the Company’s derivative assets and liabilities by counterparty, net of amounts available for offset under a master netting agreement as of March 31, 2023 and December 31, 2022: As of March 31, 2023 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. $ 379 — $ 379 — — $ 379 As of December 31, 2022 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. — $ (698) $ (698) — — $ (698) ______________ (1) In some instances, the actual amount of the collateral received and/or pledged may be more than the amount shown due to overcollateralization. (2) Net amount of derivative assets and liabilities represents the net amount due from the counterparty to the Company and the net amount due from the Company to the counterparty, respectively, in the event of default.

Investment Portfolio

Investment Portfolio	3 Months Ended
Investment Portfolio	Mar. 31, 2023
Schedule of Investments [Abstract]
Investment Portfolio	Investment Portfolio The following table summarizes the composition of the Company’s investment portfolio at cost and fair value as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Amortized Cost (1) Fair Value Percentage Amortized Cost (1) Fair Value Percentage Senior Secured Loans—First Lien $ 603,363 $ 599,454 34 % $ 702,842 $ 706,646 35 % Senior Secured Loans—Second Lien 127,698 128,043 7 % 143,153 143,270 7 % Senior Secured Bonds 10,076 10,164 1 % 10,064 10,074 0 % Unsecured Debt 143,504 139,919 8 % 253,675 241,418 12 % Preferred Equity 425,761 414,699 24 % 425,182 400,414 20 % Sustainable Infrastructure Investments, LLC 54,514 52,937 3 % 54,514 51,098 2 % Equity/Other 284,043 397,445 23 % 333,510 494,195 24 % Total $ 1,648,959 $ 1,742,661 100 % $ 1,922,940 $ 2,047,115 100 % ______________ (1) Amortized cost represents the original cost adjusted for the amortization of premiums and/or accretion of discounts, as applicable, on investments. In general, under the 1940 Act, the Company would be presumed to “control” a portfolio company if it owned more than 25% of its voting securities or it had the power to exercise control over the management or policies of a portfolio company, and would be an “affiliated person” of a portfolio company if it owned 5% or more of its voting securities. As of March 31, 2023, the Company held investments in five portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control.” As of March 31, 2023, the Company held investments in three portfolio companies of which it is deemed to “control.” For additional information with respect to such portfolio companies, see footnotes (s) and (t) to the unaudited consolidated schedule of investments as of March 31, 2023 in this quarterly report on Form 10-Q. As of December 31, 2022, the Company held investments in six portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control.” As of December 31, 2022, the Company held investments in three portfolio companies of which it is deemed to “control.” For additional information with respect to such portfolio companies, see footnotes (t) and (u) to the consolidated schedule of investments as of December 31, 2022 in this quarterly report on Form 10-Q. The Company’s investment portfolio may contain loans or bonds that are in the form of lines of credit or revolving credit facilities, or other investments, pursuant to which the Company may be required to provide funding when requested by portfolio companies in accordance with the terms of the underlying agreements. As of March 31, 2023, the Company had five senior secured loan investments with aggregate unfunded commitments of $23,937 and unfunded commitments of $7,625 in U.S. dollars and $858 in Canadian dollars to contribute capital to Sustainable Infrastructure Investments, LLC. As of December 31, 2022, the Company had six senior secured loan investments with aggregate unfunded commitments of $25,891 and unfunded commitments of $7,625 in U.S dollars and $858 in Canadian dollars to contribute capital to Sustainable Infrastructure Investments, LLC. The Company maintains sufficient cash on hand, available borrowings and/or liquid securities to fund such unfunded commitments should the need arise. The table below describes investments by industry classification and enumerates the percentage, by fair value, of the total portfolio assets in such industries as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Industry Classification Fair Value Percentage Fair Value Percentage Upstream $ 652,180 37 % $ 854,974 42 % Midstream 582,167 33 % 646,488 32 % Power 348,009 20 % 386,007 19 % Service & Equipment 97,727 6 % 99,171 5 % Industrials 9,641 1 % 9,377 0 % Sustainable Infrastructure Investments, LLC (1) 52,937 3 % 51,098 2 % Total $ 1,742,661 100 % $ 2,047,115 100 % _____________________ (1) Sustainable Infrastructure Investments, LLC is generally comprised of midstream and renewables assets. Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC, or SIIJV, is a joint venture between the Company and Imperial Sustainable Infrastructure Investments, LLC, or Imperial, a subsidiary of Imperial Capital Asset Management, LLC, or ICAM. The joint venture is governed pursuant to the terms of an amended and restated limited liability company agreement of SIIJV, dated as of January 2, 2020, between the Company and Imperial, or the SIIJV Agreement. The SIIJV Agreement requires the Company and Imperial to provide capital to SIIJV of up to $67,629 in U.S. dollars and $5,430 in Canadian dollars in the aggregate where the Company and Imperial would provide 87.5% and 12.5%, respectively, of the committed capital. Pursuant to the terms of the SIIJV Agreement, the Company and Imperial each have 50% voting control of SIIJV and are required to agree on all investment decisions as well as all other significant actions for SIIJV. SIIJV invests in senior secured loans (both first lien and second lien) to middle market companies, broadly syndicated loans and other midstream, renewables and power assets. As administrative agent of SIIJV, the Company performs certain day-to-day management responsibilities on behalf of SIIJV and is entitled to a fee in the annual amount of 0.25% of SIIJV’s net assets under administration, calculated and payable quarterly in arrears. As of March 31, 2023, the Company and Imperial funded approximately $62,300 to SIIJV, of which $54,514 was from the Company. The Company does not consolidate SIIJV in its consolidated financial statements. On January 2, 2020, Seine Funding, LLC, or Seine Funding, a wholly-owned subsidiary of SIIJV, entered into a credit facility, as amended, or the Seine Funding Facility, with certain financial institutions as lender, agent, collateral agent, collateral administrator, and collateral custodian, and SIIJV, as collateral manager. The Seine Funding Facility provides for borrowings in U.S. dollars and certain agreed upon foreign currencies in an aggregate principal amount of up to $634,103 on a committed basis, which may be increased under certain circumstances at the request of Seine Funding and with the consent of the lender and agent. The end of the reinvestment period for the Seine Funding Facility was on December 31, 2020. The maturity date for the Seine Funding Facility is the earlier of (i) the latest maturity date among the assets securing the facility and (ii) the first date, after the end of the reinvestment period, on which all assets securing the facility are paid in full. Under the Seine Funding Facility, borrowings bear interest at the rate of three-month LIBOR (or the relevant reference rate for any foreign currency borrowings) (subject to a 0% floor) plus 1.20% per annum. Borrowings under the Seine Funding Facility are secured by a first priority security interest in substantially all of the assets of Seine Funding. As of March 31, 2023, total outstanding borrowings under the Seine Funding Facility were $208,021. Below is a summary of SIIJV's portfolio, followed by a listing of the individual loans in SIIJV's portfolio as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Total investments (1) $ 272,680 $ 274,088 Weighted average current interest rate on debt investments (2) 7.26 % 6.96 % Number of portfolio assets in SIIJV 9 9 Largest investment in a single portfolio company (1) $ 73,707 $ 73,707 _____________________ (1) At cost. (2) Computed as the (a) annual stated interest rate on accruing debt, divided by (b) total debt at par amount. Sustainable Infrastructure Investments, LLC Portfolio As of March 31, 2023 (Unaudited) Portfolio Company (a)(f) Footnotes Industry Rate (b) Maturity Principal (c) Amortized Fair (d) Senior Secured Loans—First Lien—100.0% Alianca Transportadora de Gas Participacoes S.A. Midstream L+260 5/23/27 $ 73,707 $ 73,707 $ 75,719 Blue Heron Intermediate Holdco I, LLC Midstream L+188 4/22/24 31,538 31,538 31,619 Cedar Creek II LLC Renewables L+188 11/18/23 8,711 8,711 8,852 Copper Mountain Solar 3, LLC Renewables L+175 5/31/25 17,804 17,804 18,241 FLNG Liquefaction 2, LLC Midstream L+150 12/31/26 27,780 27,780 27,624 Meikle Wind Energy, LP (e) Renewables C+150 5/12/24 C$ 15,637 12,029 11,585 NES Hercules Class B Member, LLC Renewables S+165 1/31/28 $ 24,317 24,317 24,764 ST EIP Holdco LLC Midstream L+250 11/5/24 58,421 58,421 58,156 Top of the World Wind Energy LLC Renewables S+188 12/1/28 18,373 18,373 19,050 Total Senior Secured Loans—First Lien 272,680 275,610 TOTAL INVESTMENTS—100.0% $ 272,680 $ 275,610 Sustainable Infrastructure Investments, LLC Portfolio As of December 31, 2022 Portfolio Company (a)(f) Footnotes Industry Rate (b) Maturity Principal (c) Amortized Fair (d) Senior Secured Loans—First Lien—100.0% Alianca Transportadora de Gas Participacoes S.A. Midstream L+260 5/23/27 $ 73,707 $ 73,707 $ 74,601 Blue Heron Intermediate Holdco I, LLC Midstream L+188 4/22/24 31,832 31,832 31,885 Cedar Creek II LLC Renewables L+188 11/18/23 8,710 8,710 8,722 Copper Mountain Solar 3, LLC Renewables L+175 5/31/25 17,804 17,804 17,879 FLNG Liquefaction 2, LLC Midstream L+150 12/31/26 28,170 28,170 27,990 Meikle Wind Energy, LP (e) Renewables C+150 5/12/24 C$ 16,030 12,332 11,873 NES Hercules Class B Member, LLC Renewables L+150 1/31/28 $ 24,487 24,487 24,954 ST EIP Holdco LLC Midstream L+250 11/5/24 58,673 58,673 58,288 Top of the World Wind Energy LLC Renewables L+188 12/1/28 18,373 18,373 18,866 Total Senior Secured Loans—First Lien 274,088 275,058 TOTAL INVESTMENTS—100.0% $ 274,088 $ 275,058 _____________________ Percentages are shown as a percentage of total investments. (a) Security may be an obligation of one or more entities affiliated with the named company. (b) Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of March 31, 2023 and December 31, 2022, the three-month LIBOR, or L , was 5.19% and 4.77%, respectively, the Canadian Dollar Offered Rate, or C , was 5.03% and 4.94%, respectively, and the SOFR, or S, was 4.91% and 4.59%, respectively. (c) Denominated in U.S. dollars unless otherwise noted. (d) Security is classified as Level 3 and fair value is determined in accordance with the Company’s valuation process. (e) Investment denominated in Canadian dollars. Amortized cost and fair value are converted into U.S. dollars as of March 31, 2023 and December 31, 2022. (f) Security or portion thereof is held within Seine Funding and is pledged as collateral supporting the amounts outstanding under the Seine Funding Facility. Below is selected balance sheet information for SIIJV as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Selected Balance Sheet Information Total investments, at fair value $ 275,610 $ 275,058 Cash and other assets 7,152 10,380 Total assets $ 282,762 $ 285,438 Debt $ 208,021 $ 213,583 Other liabilities 2,789 3,358 Total liabilities 210,810 216,941 Member's equity $ 71,952 $ 68,497 Below is selected statement of operations information for SIIJV for the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Selected Statement of Operations Information Total investment income $ 4,798 $ 11,463 Expenses Interest expense 3,141 6,994 Administrative services 43 166 Custodian and accounting fees 45 184 Professional services 50 125 Other 10 54 Total expenses 3,289 7,523 Net investment income 1,509 3,940 Net realized and unrealized gain (loss) 1,946 (821) Net increase (decrease) in net assets resulting from operations $ 3,455 $ 3,119

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
Fair Value of Financial Instruments	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Under existing accounting guidance, fair value is defined as the price that the Company would receive upon selling an investment or pay to transfer a liability in an orderly transaction to a market participant in the principal or most advantageous market for the investment. This accounting guidance emphasizes valuation techniques that maximize the use of observable market inputs and minimize the use of unobservable inputs. Inputs refer broadly to the assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. Inputs may be observable or unobservable. Observable inputs are inputs that reflect the assumptions market participants would use in pricing an asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the assumptions market participants would use in pricing an asset or liability developed based on the best information available in the circumstances. The Company classifies the inputs used to measure these fair values into the following hierarchy as defined by current accounting guidance: Level 1: Inputs that are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2: Inputs that are quoted prices for similar assets or liabilities in active markets. Level 3: Inputs that are unobservable for an asset or liability. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. As of March 31, 2023 and December 31, 2022, the Company’s investments were categorized as follows in the fair value hierarchy: Valuation Inputs March 31, 2023 December 31, 2022 Level 1—Price quotations in active markets $ 5,011 $ 2,465 Level 2—Significant other observable inputs 229,247 450,445 Level 3—Significant unobservable inputs 1,508,403 1,594,205 Total $ 1,742,661 $ 2,047,115 As of March 31, 2023 and December 31, 2022, the Company’s swap contracts were categorized as follows in the fair value hierarchy: March 31, 2023 December 31, 2022 Valuation Inputs Assets Liabilities Assets Liabilities Level 1—Price quotations in active markets $ — $ — $ — $ — Level 2—Significant other observable inputs 379 — — 698 Level 3—Significant unobservable inputs — — — — Total $ 379 $ — $ — $ 698 The Company’s board of trustees is responsible for overseeing the valuation of the Company’s portfolio investments at fair value as determined in good faith pursuant to FS/EIG Advisor’s valuation policy. The Company’s board of trustees has designated FS/EIG Advisor with day-to-day responsibility for implementing the portfolio valuation process set forth in FS/EIG Advisor’s valuation policy. The Company’s investments consist primarily of investments that were acquired directly from the issuer. Debt investments, for which broker quotes or pricing information from third-party pricing services are not generally available, are valued by FS/EIG Advisor with the assistance of independent valuation firms, which determine a valuation range of fair value for such investments by considering, among other factors, the borrower’s ability to adequately service its debt, prevailing interest rates for like investments, call features, anticipated prepayments and other relevant terms of the investments. Except as described below, the Company’s investment in SIIJV and all of the Company’s preferred equity and equity/other investments are also valued by independent valuation firms, which determine the fair value of such investments by considering, among other factors, contractual rights ascribed to such investments, as well as various income scenarios and multiples of earnings before interest, taxes, depreciation and amortization, or EBITDA, cash flows, net income, revenues or, in limited instances, book value, PV-10 multiples or liquidation value. An investment that is newly issued and purchased near the date of the financial statements is valued at cost if FS/EIG Advisor determines that the cost of such investment is the best indication of its fair value. Such investments described above are typically classified as Level 3 within the fair value hierarchy. Investments that are traded on an active public market are valued at their closing price as of the date of the financial statements and are classified as Level 1 within the fair value hierarchy. Except as described above, FS/EIG Advisor typically values the Company’s other investments by using the midpoint of the prevailing bid and ask prices from dealers on the date of the relevant period end, which are provided by an independent third-party pricing service and screened for validity by such service and are typically classified as Level 2 within the fair value hierarchy. In determining the fair values of swap contracts, FS/EIG Advisor utilized an industry-standard pricing model that considers various inputs including quoted forward prices for commodities, time value and current market and contractual prices for the underlying instruments. These assumptions are observable in the marketplace or can be corroborated by active markets or broker quotes and are typically classified as Level 2 within the fair value hierarchy . FS/EIG Advisor periodically benchmarks the bid and ask prices it receives from the third-party pricing service and/or dealers and independent valuation firms, as applicable, against the actual prices at which the Company purchases and sells its investments. Based on the results of the benchmark analysis and the experience of the Company’s management in purchasing and selling these investments, FS/EIG Advisor believes that these prices are reliable indicators of fair value. FS/EIG Advisor reviewed the valuation determinations made with respect to these investments in a manner consistent with FS/EIG Advisor’s valuation policy. The following is a reconciliation for the three months ended March 31, 2023 and 2022 of investments for which significant unobservable inputs (Level 3) were used in determining fair value: For the Three Months Ended March 31, 2023 Senior Secured Loans—First Lien Senior Secured Loans—Second Lien Senior Secured Bonds Unsecured Debt Preferred Equity Sustainable Infrastructure Investments, LLC Equity/Other Total Fair value at beginning of period $ 443,245 $ 143,270 $ 10,074 $ 54,374 $ 400,414 $ 51,098 $ 491,730 $ 1,594,205 Accretion of discount (amortization of premium) 349 81 12 29 579 — — 1,050 Net realized gain (loss) (2,806) 9 — 5 — — (15,008) (17,800) Net change in unrealized appreciation (depreciation) (5,939) 228 78 28 13,706 1,839 (47,355) (37,415) Purchases 24,949 — — — — — 83 25,032 Paid-in-kind interest 2,395 — — 2,107 — — — 4,502 Sales and repayments (8,110) (15,545) — (500) — — (37,826) (61,981) Transfers into Level 3 (1) — — — — — — 810 810 Transfers out of Level 3 — — — — — — — — Fair value at end of period $ 454,083 $ 128,043 $ 10,164 $ 56,043 $ 414,699 $ 52,937 $ 392,434 $ 1,508,403 The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date $ (8,789) $ 228 $ 78 $ 28 $ 13,706 $ 1,839 $ (57,832) $ (50,742) For the Three Months Ended March 31, 2022 Senior Secured Loans—First Lien Senior Secured Loans—Second Lien Senior Secured Bonds Unsecured Debt Preferred Equity Sustainable Infrastructure Equity/Other Total Fair value at beginning of period $ 414,075 $ 84,083 $ 10,371 $ 104,659 $ 497,288 $ 50,770 $ 460,236 $ 1,621,482 Accretion of discount (amortization of premium) 549 74 13 22 1,406 — — 2,064 Net realized gain (loss) (12,397) 434 — (27,729) 167 — — (39,525) Net change in unrealized appreciation (depreciation) 24,374 136 106 34,665 (940) 1,330 172,334 232,005 Purchases 17,642 63,250 — — — — 9,157 90,049 Paid-in-kind interest 1,097 — — 3,843 188 — — 5,128 Sales and repayments (74,622) (17,576) — (47,571) (14,462) — — (154,231) Transfers into Level 3 (1) 58,705 — — — — — — 58,705 Transfers out of Level 3 — — — — — — — — Fair value at end of period $ 429,423 $ 130,401 $ 10,490 $ 67,889 $ 483,647 $ 52,100 $ 641,727 $ 1,815,677 The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date $ 14,611 $ 359 $ 106 $ (22) $ (940) $ 1,330 $ 172,334 $ 187,778 ______________ (1) Changes in inputs or methodologies used for valuing investments may result in transfers into or out of levels within the fair value hierarchy. Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the reporting period. For the three months ended March 31, 2023 and 2022, transfers into Level 3 were due to decreased price transparency. The valuation techniques and significant unobservable inputs used in recurring Level 3 fair value measurements as of March 31, 2023 and December 31, 2022 were as follows: Type of Investment Fair Value at March 31, 2023 (Unaudited) Valuation Technique (1) Unobservable Input Range Weighted Senior Secured Loans—First Lien $ 441,261 Market Comparables Market Yield (%) 8.3%-20.8% 12.3% EBITDA Multiples (x) 5.9x-6.2x 6.0x 12,822 Discounted Cash Flow Discount Rate (%) 7.5%-12.5% 10.0% Senior Secured Loans—Second Lien 128,043 Market Comparables Market Yield (%) 10.0%-13.3% 11.6% Senior Secured Bonds 10,164 Market Comparables Market Yield (%) 6.9%-7.9% 7.4% Unsecured Debt 18,818 Market Comparables Market Yield (%) 10.0%-11.0% 10.5% 37,225 Other (2) Preferred Equity 328,662 Market Comparables Market Yield (%) 10.3%-28.3% 18.8% EBITDA Multiples (x) 10.3x-11.3x 10.8x Net Aircraft Book Value Multiple (x) 1.0x-1.0x 1.0x 86,037 Discounted Cash Flow Discount Rate (%) 11.5%-12.0% 11.8% Sustainable Infrastructure Investments, LLC 52,937 Discounted Cash Flow Discount Rate (%) 13.5%-14.5% 14.0% Equity/Other 349,629 Market Comparables EBITDA Multiples (x) 3.8x-11.3x 4.9x Production Multiples (Mboe/d) $27,578.0-$31,344.0 $29,447.0 Proved Reserves Multiples (Mmboe) $5.8-$6.6 $6.2 Production Multiples (MMcfe/d) $2,850.0-$3,150.0 $3,000.0 Proved Reserves Multiples (Bcfe) 0.7x-0.7x 0.7x PV-10 Multiples (x) 0.3x-0.9x 0.8x 13,683 Discounted Cash Flow Discount Rate (%) 8.0%-33.0% 13.4% 7,488 Option Valuation Model Volatility (%) 28.1%-65.0% 37.1% 21,634 Other (2) Total $ 1,508,403 Type of Investment Fair Value at Valuation Technique (1) Unobservable Input Range Weighted Senior Secured Loans—First Lien $ 413,268 Market Comparables Market Yield (%) 8.5%-21.8% 12.3% EBITDA Multiples (x) 5.0x-7.5x 6.3x 29,977 Discounted Cash Flow Discount Rate (%) 11.5%-19.5% 15.4% Senior Secured Loans—Second Lien 143,270 Market Comparables Market Yield (%) 10.3%-14.3% 11.8% Senior Secured Bonds 10,074 Market Comparables Market Yield (%) 6.9%-7.9% 7.4% Unsecured Debt 19,256 Market Comparables Market Yield (%) 10.3%-11.3% 10.8% 35,118 Other (2) Preferred Equity 316,767 Market Comparables Market Yield (%) 8.8%-30.3% 19.0% EBITDA Multiples (x) 9.5x-10.5x 10.0x Net Aircraft Book Value Multiple (x) 1.0x-1.0x 1.0x 83,647 Discounted Cash Flow Discount Rate (%) 11.3%-12.3% 11.8% Sustainable Infrastructure Investments, LLC 51,098 Discounted Cash Flow Discount Rate (%) 13.5%-14.5% 14.0% Equity/Other 481,623 Market Comparables EBITDA Multiples (x) 1.8x-10.5x 5.4x Production Multiples (Mboe/d) $27,946.0-$37,500.0 $30,265.3 Proved Reserves Multiples (Mmboe) $6.9-$10.3 $7.6 Production Multiples (MMcfe/d) $3,400.0-$3,700.0 $3,550.0 Proved Reserves Multiples (Bcfe) 0.8x-0.9x 0.8x PV-10 Multiples (x) 0.5x-0.9x 0.8x 2,488 Discounted Cash Flow Discount Rate (%) 8.0%-33.0% 23.8% 5,734 Option Valuation Model Volatility (%) 31.5%-55.1% 36.6% 1,885 Other (2) Total $ 1,594,205 ______________ (1) Investments using a market quotes valuation technique were valued by using the midpoint of the prevailing bid and ask prices from dealers on the date of the relevant period end, which were provided by an independent third-party pricing service and screened for validity by such service. For investments utilizing a market comparables valuation technique, a significant increase (decrease) in the market yield, in isolation, would result in a significantly lower (higher) fair value measurement, and a significant increase (decrease) in any of the valuation multiples, in isolation, would result in a significantly higher (lower) fair value measurement. For investments utilizing a discounted cash flow valuation technique, a significant increase (decrease) in the discount rate, in isolation, would result in a significantly lower (higher) fair value measurement. For investments utilizing an option valuation model valuation technique, a significant increase (decrease) in the volatility, in isolation, would result in a significantly higher (lower) fair value measurement. (2) Fair valued based on expected outcome of proposed corporate transactions, the expected value of the liquidation preference of the investment or other factors.

Financing Arrangements

Financing Arrangements	3 Months Ended
Financing Arrangements	Mar. 31, 2023
Debt Disclosure [Abstract]
Financing Arrangements	Financing Arrangements The following tables present a summary of information with respect to the Company’s outstanding financing arrangements as of March 31, 2023 and December 31, 2022. For additional information regarding these financing arrangements, see the notes to the Company’s audited consolidated financial statements contained in its annual report on Form 10-K for the year ended December 31, 2022. Any significant changes to the Company’s financing arrangements during the three months ended March 31, 2023 are discussed below. As of March 31, 2023 Arrangement (1) Type of Arrangement Rate (2) Amount Amount Maturity Date Senior Secured Notes (3)(5) Bond 7.50% $ 457,075 $ — August 15, 2023 Total $ 457,075 $ — As of December 31, 2022 Arrangement (1) Type of Arrangement Rate (2) Amount Amount Maturity Date JPMorgan Facility Term Loan L+3.00% $ 305,676 $ — February 16, 2023 (4) Senior Secured Notes (3) Bond 7.50% 457,075 — August 15, 2023 Total $ 762,751 $ — ______________________ (1) The carrying amount outstanding under the facility approximates its fair value, unless otherwise noted. (2) LIBOR is subject to a 0.00% floor. (3) As of March 31, 2023 and December 31, 2022 , the fair value of the Senior Secured Notes was approximately $457,569 and $458,908, respectively. These valuations are considered Level 2 valuations within the fair value hierarchy. (4) On February 14, 2023, the Company repaid and terminated the JPMorgan Facility. (5) On April 14, 2023, the Company delivered notice of its intention to redeem 100% of the issued and outstanding Senior Secured Notes on May 15, 2023 at a price equal to 100% of the principal amount of the notes being redeemed, plus any accrued but unpaid interest, if any, to, but excluding, May 15, 2023. For the three months ended March 31, 2023 and 2022, the components of total interest expense for the Company's financing arrangements were as follows: Three Months Ended 2023 2022 Arrangement (1) Direct Interest Expense (2) Amortization of Deferred Financing Costs and Discount Total Interest Expense Direct Interest Expense (2) Amortization of Deferred Financing Costs and Discount Total Interest Expense JPMorgan Facility (3) $ 2,790 $ 238 $ 3,028 $ 2,405 $ 905 $ 3,310 Senior Secured Notes (4) 8,570 1,000 9,570 9,104 1,280 10,384 Total $ 11,360 $ 1,238 $ 12,598 $ 11,509 $ 2,185 $ 13,694 ___________________ (1) Borrowings of each of the Company's wholly-owned special-purpose financing subsidiaries are considered borrowings of the Company for purposes of complying with the asset coverage requirements applicable to BDCs under the 1940 Act. (2) Direct interest expense includes the effect of non-usage fees, administration fees and make-whole fees, if any. (3) On February 14, 2023, the Company repaid and terminated the JPMorgan Facility. (4) On April 14, 2023, the Company delivered notice of its intention to redeem 100% of the issued and outstanding Senior Secured Notes on May 15, 2023 at a price equal to 100% of the principal amount of the notes being redeemed, plus any accrued but unpaid interest, if any, to, but excluding, May 15, 2023. The Company’s average borrowings and weighted average interest rate, including the effect of non-usage fees, for the three months ended March 31, 2023 were $606,516 and 8.31%, respectively. As of March 31, 2023, the Company’s effective interest rate on borrowings was 7.50%. The Company’s average borrowings and weighted average interest rate, including the effect of non-usage fees, for the three months ended March 31, 2022 were $779,774 and 7.02%, respectively. As of March 31, 2022, the Company’s effective interest rate on borrowings was 5.91%. Under its financing arrangements, the Company has made certain representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar financing arrangements. The Company was in compliance with all covenants required by its financing arrangements as of March 31, 2023 and December 31, 2022. JPMorgan Facility On August 16, 2018, the Company entered into that certain Senior Secured Credit Agreement, by and among the Company, the lenders party thereto, JPMorgan Chase Bank, N.A., or JPMorgan, as administrative agent and collateral agent, and the other parties signatory thereto, or as amended, the JPMorgan Facility. On February 14, 2023, the Company repaid and terminated the JPMorgan Facility. Prior to the termination of the JPMorgan Facility, $305,676 aggregate principal amount of loans were outstanding to the Company and such loans accrued interest at a rate equal to LIBOR (subject to a 0.00% floor) plus 3.00% per annum. The Company incurred certain customary costs and expenses in connection with the termination of the JPMorgan Facility.

Commitment and Contingencies

Commitment and Contingencies	3 Months Ended
Commitment and Contingencies	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and ContingenciesThe Company enters into contracts that contain a variety of indemnification provisions. The Company’s maximum exposure under these arrangements is unknown; however, the Company has not had prior claims or losses pursuant to these contracts. FS/EIG Advisor has reviewed the Company’s existing contracts and expects the risk of loss to the Company to be remote. The Company is not currently subject to any material legal proceedings and, to the Company’s knowledge, no material legal proceedings are threatened against the Company. From time to time, the Company may be a party to certain legal proceedings in the ordinary course of business, including proceedings relating to the enforcement of the Company’s rights under contracts with its portfolio companies. While the outcome of any legal proceedings cannot be predicted with certainty, the Company does not expect that any such proceedings will have a material effect upon its financial condition or results of operations. See Note 4 for a discussion of the Company’s commitments to FS/EIG Advisor and its affiliates (including FS Investments) and Note 7 for a discussion of the Company’s unfunded commitments.

Financial Highlights

Financial Highlights	3 Months Ended
Financial Highlights	Mar. 31, 2023
Investment Company [Abstract]
Financial Highlights	Financial Highlights The following is a schedule of financial highlights of the Company for the three months ended March 31, 2023 and the year ended December 31, 2022: Three Months Ended (Unaudited) Year Ended December 31, 2022 Per Share Data: (1) Net asset value, beginning of period $ 3.88 $ 3.59 Results of operations (2) Net investment income 0.04 0.16 Net realized gain (loss) and unrealized appreciation (depreciation) (0.11) 0.25 Net increase (decrease) in net assets resulting from operations (0.07) 0.41 Shareholder distributions (3) Distributions from net investment income (0.03) (0.12) Net decrease in net assets resulting from shareholder distributions (0.03) (0.12) Capital share transactions Issuance of common shares (4) — — Net increase (decrease) in net assets resulting from capital share transactions — — Net asset value, end of period $ 3.78 $ 3.88 Shares outstanding, end of period 452,787,008 451,465,673 Total return (5) (1.82) % 11.39 % Total return (without assuming reinvestment of distributions) (5) (1.80) % 11.29 % Ratio/Supplemental Data: Net assets, end of period $ 1,712,828 $ 1,753,748 Ratio of net investment income to average net assets (6)(7) 3.84 % 4.02 % Ratio of total operating expenses to average net assets (6) 5.93 % 6.78 % Ratio of management fee offset to average net assets (6) (0.01) % (0.15) % Ratio of net operating expenses to average net assets (6) 5.92 % 6.63 % Ratio of interest expense to average net assets (6) 2.85 % 3.21 % Portfolio turnover (8) 1.30 % 16.15 % Total amount of senior securities outstanding, exclusive of treasury securities $ 457,075 $ 762,751 Asset coverage per unit (9) 4.75 3.30 _________________________ (1) Per share data may be rounded in order to recompute the ending net asset value per share. (2) The per share data was derived by using the weighted average shares outstanding during the applicable period. (3) The per share data for distributions reflects the actual amount of distributions paid per share during the applicable period. (4) The issuance of common shares on a per share basis reflects the incremental net asset value changes as a result of the issuance of common shares pursuant to the Company’s distribution reinvestment plan. The issuance of common shares at a price that is greater than the net asset value per share results in an increase in net asset value per share. (5) The total return for each period presented was calculated based on the change in net asset value during the applicable period, including the impact of distributions reinvested in accordance with the Company’s distribution reinvestment plan. The total return (without assuming reinvestment of distributions) for each period presented was calculated by taking the net asset value per share as of the end of the applicable period, adding the cash distributions per share which were declared during the applicable period and dividing the total by the net asset value per share at the beginning of the applicable period. The total returns do not consider the effect of any sales commissions or charges that may be incurred in connection with the sale of the Company’s common shares. The total returns include the effect of the issuance of common shares at a net offering price that is greater than net asset value per share, which causes an increase in net asset value per share. The historical calculations of total returns in the table should not be considered representations of the Company’s future total returns, which may be greater or less than the returns shown in the table due to a number of factors, including the Company’s ability or inability to make investments in companies that meet its investment criteria, the interest rates payable on the debt securities the Company acquires, the level of the Company’s expenses, variations in and the timing of the recognition of realized and unrealized gains or losses, the degree to which the Company encounters competition in its markets and general economic conditions. As a result of these factors, results for any previous period should not be relied upon as being indicative of performance in future periods. The total return calculations set forth above represent the total returns on the Company’s investment portfolio during the applicable period and do not represent actual returns to shareholders. (6) Weighted average net assets during the applicable period are used for this calculation. Ratios for the three months ended March 31, 2023 are annualized. Annualized ratios for the three months ended March 31, 2023 are not necessarily indicative of the ratios that may be expected for the year ending December 31, 2023. (7) If FS/EIG Advisor had not agreed to offset the amount of any structuring, upfront or certain other fees it or its members received against the management fee payable by the Company, the ratio of net investment income to average net assets would have been 3.83% and 3.87% for the three months ended March 31, 2023 and the year ended December 31, 2022, respectively. See Note 4 for a discussion of the management fee offset with FS/EIG Advisor. (8) Portfolio turnover for the three months ended March 31, 2023 is not annualized. (9) Asset coverage per unit is the ratio of the carrying value of the Company’s total consolidated assets, less liabilities and indebtedness not represented by senior securities, to the aggregate amount of senior securities representing indebtedness.

N-2

N-2	3 Months Ended
N-2	Mar. 31, 2023
Cover [Abstract]
Entity Central Index Key	0001501729
Amendment Flag	false
Securities Act File Number	814-00841
Document Type	10-Q
Entity Registrant Name	FS Energy and Power Fund
Entity Address, Address Line One	201 Rouse Boulevard
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19112
City Area Code	215
Local Phone Number	495-1150
Entity Emerging Growth Company	false
General Description of Registrant [Abstract]
Investment Objectives and Practices [Text Block]	Our investment objective is to generate current income and long-term capital appreciation. We pursue our investment objective by focusing on the following seven investment themes: (i) basin-on-basin competition in U.S. shale, (ii) globalization of natural gas, (iii) coal retirements and the evolving energy generation mix, (iv) renewables focused on power grid parity, (v) export infrastructure for emerging U.S. producers, (vi) market liberalization opening new markets and (vii) midstream infrastructure connecting new supplies. However, we may pursue other investment opportunities if we believe it is in our best interests and consistent with our investment objectives. Within the above investment themes, we intend to focus on the following investment categories in an effort to generate returns for our investors with an acceptable level of risk. Direct Originations : Through FS/EIG Advisor, we intend to directly source investment opportunities across the Energy industry. Such investments are typically originated and structured through a negotiated process in which we directly participate and are not generally available to the broader market. These investments may include both debt and equity components. We believe directly originated investments may offer higher returns and more favorable protections than broadly syndicated transactions. Broadly Syndicated Loan and Bond Transactions : Although our primary focus is to invest in directly originated transactions, in certain circumstances we will also invest in the broadly syndicated loan and high yield bond markets. Broadly syndicated loans and bonds are generally more liquid than our directly originated investments and provide a complement to our less liquid strategies. In the case of broadly syndicated investments, we generally intend to capitalize on market inefficiencies by investing in loans, bonds, and other asset classes where the market price of such investment reflects a lower value than we believe is warranted based on our fundamental analysis, providing us with an opportunity to earn an attractive return on our investment. The majority of our portfolio is comprised of income-oriented securities, which principally refers to debt securities and income-oriented preferred and common equity interests, of privately-held Energy companies within the United States. Generally, w e expect to invest primarily in directly originated investments and primary market transactions, as this will provide us with the ability to tailor investments to best match a project’s or company’s needs with our investment objectives. We intend to weight our portfolio towards senior secured debt and directly originated preferred equity investments, which we believe offer opportunities for superior risk-adjusted returns and income generation. Our debt investments may take the form of corporate or project loans or bonds, may be secured or unsecured and may, in some cases, be accompanied by yield enhancements. These yield enhancements are typically expected to include royalty interests in mineral, oil and gas properties, warrants, options, net profits interests, cash flow participations or other forms of equity participation that can provide additional consideration or “upside” in a transaction. Our preferred equity investments are mostly directly originated and may take the form of perpetual or redeemable securities, typically with a current income component and minimum base returns. In addition, certain income-oriented preferred or common equity interests may include interests in master limited partnerships and a portion of our portfolio may be comprised of derivatives, including the use of total return swaps, credit default swaps and other commodity swap contracts. In connection with certain of our debt investments or any restructuring of these debt investments, we may on occasion receive equity interests, including warrants or options, as additional consideration or otherwise in connection with a restructuring. FS/EIG Advisor will seek to tailor our investment focus as market conditions evolve.
Risk Factors [Table Text Block]	Item 1A. Risk Factors. In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the risk factors that appeared under Item 1A. “Risk Factors” in our most recent Annual Report on Form 10-K. There are no material changes from the risk factors included within our most recent Annual Report on Form 10-K, other than the risks described below. Our business is dependent on bank relationships and recent strain on the banking system may adversely impact us. The financial markets recently have encountered volatility associated with concerns about the balance sheets of banks, especially small and regional banks who may have significant losses associated with investments that make it difficult to fund demands to withdraw deposits and other liquidity needs. Although the federal government has announced measures to assist these banks and protect depositors, some banks have already been impacted and others may be materially and adversely impacted. Our business is dependent on bank relationships and we are proactively monitoring the financial health of such bank relationships. Continued strain on the banking system may adversely impact our business, financial condition and results of operations. Our transition to a new investment policy will increase portfolio turnover, which will increase commission and transaction costs. We expect that the transition to the Company's new investment policy will require more frequent trading and a high portfolio turnover (i.e., the purchase and sale of instruments and securities). The more frequently the Company trades, the higher the commission and transaction costs and certain other expenses involved in its operations. The Company will bear these costs regardless of the profitability of its investment and trading activities. In addition, a high portfolio turnover may increase the recognition of short-term, rather than long-term, capital gains. The Company’s debt investments are subject to certain risks. Debt investments are subject to the risk of non-payment of scheduled interest or principal by the borrowers with respect to such investments. Such non-payment would likely result in a reduction of income to the Company and a reduction in the value of the debt investments experiencing non-payment. Although the Company may invest in investments that management believes are secured by specific collateral, the value of which may exceed the principal amount of the investments at the time of initial investment, there can be no assurance that the liquidation of any such collateral would satisfy the borrower’s obligation in the event of non-payment of scheduled interest or principal payments with respect to such investment, or that such collateral could be readily liquidated. In addition, in the event of bankruptcy of a borrower, the Company could experience delays or limitations with respect to its ability to realize the benefits of the collateral securing an investment. Under certain circumstances, collateral securing an investment may be released without the consent of the Company. Moreover, the Company’s investments in secured debt may be unperfected for a variety of reasons, including the failure to make required filings by lenders, trustees or other responsible parties and, as a result, the Company may not have priority over other creditors as anticipated. The Company’s right to payment and its security interest, if any, may be subordinated to the payment rights and security interests of more senior creditors. Certain of these investments may have an interest-only payment schedule, with the principal amount remaining outstanding and at risk until the maturity of the investment. In this case, a portfolio company’s ability to repay the principal of an investment may be dependent upon a liquidity event or the long-term success of the company, the occurrence of which is uncertain. Companies in which the Company invests could deteriorate as a result of, among other factors, an adverse development in their business, a change in the competitive environment or an economic downturn. As a result, companies that the Company expected to be stable may operate, or expect to operate, at a loss or have significant variations in operating results, may require substantial additional capital to support their operations or maintain their competitive position, or may otherwise have a weak financial condition or be experiencing financial distress. Below investment grade debt instruments may be subject to greater risks than securities or instruments that have higher credit ratings, including a higher risk of default. The credit rating of a corporate bond and senior loan that is rated below investment grade does not necessarily address its market value risk, and ratings may from time to time change, positively or negatively, to reflect developments regarding the
Dependency On Bank Relationships [Member]
General Description of Registrant [Abstract]
Risk [Text Block]	Our business is dependent on bank relationships and recent strain on the banking system may adversely impact us. The financial markets recently have encountered volatility associated with concerns about the balance sheets of banks, especially small and regional banks who may have significant losses associated with investments that make it difficult to fund demands to withdraw deposits and other liquidity needs. Although the federal government has announced measures to assist these banks and protect depositors, some banks have already been impacted and others may be materially and adversely impacted. Our business is dependent on bank relationships and we are proactively monitoring the financial health of such bank relationships. Continued strain on the banking system may adversely impact our business, financial condition and results of operations.
Transition To New Investment Policy With Increased Portfolio Turnover [Member]
General Description of Registrant [Abstract]
Risk [Text Block]	Our transition to a new investment policy will increase portfolio turnover, which will increase commission and transaction costs. We expect that the transition to the Company's new investment policy will require more frequent trading and a high portfolio turnover (i.e., the purchase and sale of instruments and securities). The more frequently the Company trades, the higher the commission and transaction costs and certain other expenses involved in its operations. The Company will bear these costs regardless of the profitability of its investment and trading activities. In addition, a high portfolio turnover may increase the recognition of short-term, rather than long-term, capital gains.
Debt Investment Risk [Member]
General Description of Registrant [Abstract]
Risk [Text Block]	The Company’s debt investments are subject to certain risks. Debt investments are subject to the risk of non-payment of scheduled interest or principal by the borrowers with respect to such investments. Such non-payment would likely result in a reduction of income to the Company and a reduction in the value of the debt investments experiencing non-payment. Although the Company may invest in investments that management believes are secured by specific collateral, the value of which may exceed the principal amount of the investments at the time of initial investment, there can be no assurance that the liquidation of any such collateral would satisfy the borrower’s obligation in the event of non-payment of scheduled interest or principal payments with respect to such investment, or that such collateral could be readily liquidated. In addition, in the event of bankruptcy of a borrower, the Company could experience delays or limitations with respect to its ability to realize the benefits of the collateral securing an investment. Under certain circumstances, collateral securing an investment may be released without the consent of the Company. Moreover, the Company’s investments in secured debt may be unperfected for a variety of reasons, including the failure to make required filings by lenders, trustees or other responsible parties and, as a result, the Company may not have priority over other creditors as anticipated. The Company’s right to payment and its security interest, if any, may be subordinated to the payment rights and security interests of more senior creditors. Certain of these investments may have an interest-only payment schedule, with the principal amount remaining outstanding and at risk until the maturity of the investment. In this case, a portfolio company’s ability to repay the principal of an investment may be dependent upon a liquidity event or the long-term success of the company, the occurrence of which is uncertain. Companies in which the Company invests could deteriorate as a result of, among other factors, an adverse development in their business, a change in the competitive environment or an economic downturn. As a result, companies that the Company expected to be stable may operate, or expect to operate, at a loss or have significant variations in operating results, may require substantial additional capital to support their operations or maintain their competitive position, or may otherwise have a weak financial condition or be experiencing financial distress.
Below Investment Grade Debt Insruments [Member]
General Description of Registrant [Abstract]
Risk [Text Block]	Below investment grade debt instruments may be subject to greater risks than securities or instruments that have higher credit ratings, including a higher risk of default. The credit rating of a corporate bond and senior loan that is rated below investment grade does not necessarily address its market value risk, and ratings may from time to time change, positively or negatively, to reflect developments regarding the

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. For a more complete discussion of significant accounting policies and certain other information, the Company’s interim unaudited consolidated financial statements should be read in conjunction with its audited consolidated financial statements as of and for the year ended December 31, 2022 included in the Company’s annual report on Form 10-K. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The December 31, 2022 consolidated balance sheet and consolidated schedule of investments are derived from the Company's audited consolidated financial statements as of and for the year ended December 31, 2022. The Company is considered an investment company under GAAP and follows the accounting and reporting guidance applicable to investment companies under Accounting Standards Codification Topic 946, Financial Services—Investment Companies. The Company has evaluated the impact of subsequent events through the date the unaudited consolidated financial statements were issued and filed with the Securities and Exchange Commission, or the SEC.
Use of Estimates	Use of Estimates: The preparation of the unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Many of the amounts have been rounded, and all amounts are in thousands, except share and per share amounts.
Capital Gains Incentive Fee and Subordinated Income Incentive Fee	Capital Gains Incentive Fee: Pursuant to the terms of the FS/EIG investment advisory agreement, the incentive fee on capital gains is determined and payable in arrears as of the end of each calendar year (or upon termination of such agreement). Such fee equals 20.0% of the Company’s “incentive fee capital gains,” which are the Company’s realized capital gains on a cumulative basis from inception, calculated as of the end of the applicable period, computed net of all realized capital losses and unrealized capital depreciation on a cumulative basis, less the aggregate amount of any previously paid incentive fees on capital gains. The Company will accrue for the incentive fee on capital gains, which, if earned, will be paid annually. The Company will accrue the incentive fee on capital gains based on net realized and unrealized gains; however, the fee payable to FS/EIG Advisor will be based on realized Subordinated Income Incentive Fee:
Reclassifications	Reclassifications: Certain amounts in the unaudited consolidated financial statements for the three months ended March 31, 2022 may have been reclassified to conform to the classifications used to prepare the unaudited consolidated financial statements for the three months ended March 31, 2023
Revenue Recognition	Revenue Recognition: Security transactions are accounted for on the trade date. The Company records interest income on an accrual basis to the extent that it expects to collect such amounts. The Company records dividend income on the ex-dividend date. Distributions received from limited liability company, or LLC, and limited partnership, or LP, investments are evaluated to determine if the distribution should be recorded as dividend income or a return of capital. The Company does not accrue as a receivable interest or dividends on loans and securities if it has reason to doubt its ability to collect such income. The Company’s policy is to place investments on non-accrual status when there is reasonable doubt that interest income will be collected. The Company considers many factors relevant to an investment when placing it on or removing it from non-accrual status including, but not limited to, the delinquency status of the investment, economic and business conditions, the overall financial condition of the underlying investment, the value of the underlying collateral, bankruptcy status, if any, and any other facts or circumstances relevant to the investment. If there is reasonable doubt that the Company will receive any previously accrued interest, then the accrued interest will be written-off. Payments received on non-accrual investments may be recognized as income or applied to principal depending upon the collectability of the remaining principal and interest. Non-accrual investments may be restored to accrual status when principal and interest become current and are likely to remain current based on the Company’s judgment.
Recent Accounting Pronouncements	Recent Accounting Pronouncements: In March 2020, the FASB issued Accounting Standards Update No. 2020-04, Reference Rate Reform (Topic 848) , or ASU 2020-04, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The a mendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. In January 2021, the FASB issued Accounting Standards Update No. 2021-01, Reference Rate Reform (Topic 848) , or ASU 2021-01, which expanded the scope of Topic 848 to include derivative instruments impacted by discounting transition. ASU 2020-04 and ASU 2021-01 are effective for all entities through December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications and hedging relationships entered into or evaluated after December 31, 2022, except for hedging transactions as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. In December 2022, the FASB issued Accounting Standards Update No. 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 , or ASU 2022-06, which deferred the sunset date of this guidance to December 31, 2024. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Share Transactions (Tables)

Share Transactions (Tables)	3 Months Ended
Share Transactions (Tables)	Mar. 31, 2023
Equity [Abstract]
Schedule of Common Stock Transactions	Below is a summary of transactions with respect to the Company’s common shares during the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Shares Amount Shares Amount Reinvestment of Distributions 1,321,335 $ 5,218 1,434,432 $ 5,235 Proceeds from Share Transactions 1,321,335 $ 5,218 1,434,432 $ 5,235

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
Related Party Transactions (Tables)	Mar. 31, 2023
Related Party Transactions [Abstract]
Schedule of the Fees and Expenses Accrued Under Investment Advisory Agreement	The following table describes the fees and expenses accrued under the FS/EIG investment advisory agreement during the three months ended March 31, 2023 and 2022: Three Months Ended Related Party Source Agreement Description 2023 2022 FS/EIG Advisor FS/EIG investment advisory agreement Base Management Fee (1) $ 10,219 $ 10,037 FS/EIG Advisor FS/EIG investment advisory agreement Administrative Services Expenses (2) $ 1,320 $ 1,420 _________________________ (1) During the three months ended March 31, 2023 and 2022, $11,185 and $10,466, respectively, in base management fees were paid to FS/EIG Advisor. The base management fee amount shown in the table above is shown net of $255 and $698 in structuring, upfront or certain other fees received by FS/EIG Advisor or its members and offset against base management fees for the three months ended March 31, 2023 and 2022, respectively. As of March 31, 2023 , $10,219 in base management fees were payable to FS/EIG Advisor. (2) During the three months ended March 31, 2023 and 2022, $645 and $638, respectively, of the accrued administrative services expenses related to the allocation of costs of administrative personnel for services rendered to the Company by FS/EIG Advisor and the remainder related to other reimbursable expenses. The Company paid $1,458 and $1,121 in administrative services expenses to FS/EIG Advisor, or its affiliates, during the three months ended March 31, 2023 and 2022, respectively.

Distributions (Tables)

Distributions (Tables)	3 Months Ended
Distributions (Tables)	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Cash Distributions Paid on Common Stock Including Tax Basis	The following table reflects the cash distributions per share that the Company declared on its common shares during the three months ended March 31, 2023 and 2022: Distribution For the Three Months Ended Per Share Amount Fiscal 2022 March 31, 2022 $ 0.03 $ 13,426 Fiscal 2023 March 31, 2023 $ 0.03 $ 13,584 The following table reflects the sources of the cash distributions on a tax basis that the Company declared on its common shares during the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Source of Distribution Distribution Amount Percentage Distribution Amount Percentage Net investment income (1) $ 13,584 100 % $ 13,426 100 % Short-term capital gains proceeds from the sale of assets — — — — Long-term capital gains proceeds from the sale of assets — — — — Total $ 13,584 100 % $ 13,426 100 % _________________________ (1) During the three months ended March 31, 2023 and 2022, 86.6% and 80.1%, respectively, of the Company's gross investment income was attributable to cash income earned, 10.5% and 14.3%, respectively, was attributable to paid-in-kind, or PIK, interest and 2.9% and 5.6%, respectively, was attributable to non-cash accretion of discount.

Financial Instruments (Tables)

Financial Instruments (Tables)	3 Months Ended
Financial Instruments (Tables)	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fixed Price Swap Positions	The following table presents the fair value of open swap contracts (which are not considered to be hedging instruments for accounting disclosure purposes) as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Instrument Asset (1) Liability (2) Asset (1) Liability (2) Swap Contracts—Crude Oil $ 161 $ — $ — $ (572) Swap Contracts—Natural Gas 218 — — (126) Total $ 379 $ — $ — $ (698) ______________ (1) Reflected on the Company's consolidated balance sheets as: Unrealized appreciation on swap contracts. (2) Reflected on the Company's consolidated balance sheets as: Unrealized depreciation on swap contracts.
Schedule of Realized and Unrealized Gain (Loss) on Derivative Instruments	The effect of swap contracts (which are not considered to be hedging instruments for accounting disclosure purposes) on the Company's statements of operations for the three months ended March 31, 2023 and 2022 was as follows: Net Realized Gains (Losses) (1) Net Change in Unrealized (2) Three Months Ended Three Months Ended Instrument 2023 2022 2023 2022 Swap Contracts—Crude Oil $ (100) $ (392) $ 733 $ (2,976) Swap Contracts—Natural Gas 112 (24) 344 (506) Total $ 12 $ (416) $ 1,077 $ (3,482) ______________ (1) Reflected on the Company's consolidated statements of operations as: Net realized gain (loss) on swap contracts. (2) Reflected on the Company's consolidated statements of operations as: Net change in unrealized appreciation (depreciation) on swap contracts.
Schedule of Offsetting Liabilities	The following tables present the Company’s derivative assets and liabilities by counterparty, net of amounts available for offset under a master netting agreement as of March 31, 2023 and December 31, 2022: As of March 31, 2023 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. $ 379 — $ 379 — — $ 379 As of December 31, 2022 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. — $ (698) $ (698) — — $ (698) ______________ (1) In some instances, the actual amount of the collateral received and/or pledged may be more than the amount shown due to overcollateralization. (2) Net amount of derivative assets and liabilities represents the net amount due from the counterparty to the Company and the net amount due from the Company to the counterparty, respectively, in the event of default.
Schedule of Offsetting Assets	The following tables present the Company’s derivative assets and liabilities by counterparty, net of amounts available for offset under a master netting agreement as of March 31, 2023 and December 31, 2022: As of March 31, 2023 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. $ 379 — $ 379 — — $ 379 As of December 31, 2022 Counterparty Derivative Assets Derivative Liabilities Net Value of Derivatives Non-Cash Collateral (Received) Pledged (1) Cash Collateral (Received) Pledged (1) Net Amount of Derivative Assets (Liabilities) (2) BP Energy Co. — $ (698) $ (698) — — $ (698) ______________ (1) In some instances, the actual amount of the collateral received and/or pledged may be more than the amount shown due to overcollateralization. (2) Net amount of derivative assets and liabilities represents the net amount due from the counterparty to the Company and the net amount due from the Company to the counterparty, respectively, in the event of default.
Schedule of Derivative Instruments	Below is a summary of the Company's open fixed price swap positions as of March 31, 2023. The hedged volumes reflected below represent an aggregation of multiple derivative contracts that have varying durations and may not be realized on a ratable basis over a calendar year. Swap Contracts—Crude Oil Year Settlement Index Bbls Weighted Average Price 2023 ICE Brent 123,680 $80.00 Swap Contracts—Natural Gas Year Settlement Index MMBtu Weighted Average Price 2023 NYMEX Henry Hub 227,542 $3.80

Investment Portfolio (Tables)

Investment Portfolio (Tables)	3 Months Ended
Investment Portfolio (Tables)	Mar. 31, 2023
Schedule of Investments [Abstract]
Schedule of Investments	The following table summarizes the composition of the Company’s investment portfolio at cost and fair value as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Amortized Cost (1) Fair Value Percentage Amortized Cost (1) Fair Value Percentage Senior Secured Loans—First Lien $ 603,363 $ 599,454 34 % $ 702,842 $ 706,646 35 % Senior Secured Loans—Second Lien 127,698 128,043 7 % 143,153 143,270 7 % Senior Secured Bonds 10,076 10,164 1 % 10,064 10,074 0 % Unsecured Debt 143,504 139,919 8 % 253,675 241,418 12 % Preferred Equity 425,761 414,699 24 % 425,182 400,414 20 % Sustainable Infrastructure Investments, LLC 54,514 52,937 3 % 54,514 51,098 2 % Equity/Other 284,043 397,445 23 % 333,510 494,195 24 % Total $ 1,648,959 $ 1,742,661 100 % $ 1,922,940 $ 2,047,115 100 % ______________ (1) Amortized cost represents the original cost adjusted for the amortization of premiums and/or accretion of discounts, as applicable, on investments. The table below describes investments by industry classification and enumerates the percentage, by fair value, of the total portfolio assets in such industries as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Industry Classification Fair Value Percentage Fair Value Percentage Upstream $ 652,180 37 % $ 854,974 42 % Midstream 582,167 33 % 646,488 32 % Power 348,009 20 % 386,007 19 % Service & Equipment 97,727 6 % 99,171 5 % Industrials 9,641 1 % 9,377 0 % Sustainable Infrastructure Investments, LLC (1) 52,937 3 % 51,098 2 % Total $ 1,742,661 100 % $ 2,047,115 100 % _____________________ (1) Sustainable Infrastructure Investments, LLC is generally comprised of midstream and renewables assets.
Schedule of Nonconsolidated Subsidiary Portfolio	Below is a summary of SIIJV's portfolio, followed by a listing of the individual loans in SIIJV's portfolio as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Total investments (1) $ 272,680 $ 274,088 Weighted average current interest rate on debt investments (2) 7.26 % 6.96 % Number of portfolio assets in SIIJV 9 9 Largest investment in a single portfolio company (1) $ 73,707 $ 73,707 _____________________ (1) At cost. (2) Computed as the (a) annual stated interest rate on accruing debt, divided by (b) total debt at par amount. Sustainable Infrastructure Investments, LLC Portfolio As of March 31, 2023 (Unaudited) Portfolio Company (a)(f) Footnotes Industry Rate (b) Maturity Principal (c) Amortized Fair (d) Senior Secured Loans—First Lien—100.0% Alianca Transportadora de Gas Participacoes S.A. Midstream L+260 5/23/27 $ 73,707 $ 73,707 $ 75,719 Blue Heron Intermediate Holdco I, LLC Midstream L+188 4/22/24 31,538 31,538 31,619 Cedar Creek II LLC Renewables L+188 11/18/23 8,711 8,711 8,852 Copper Mountain Solar 3, LLC Renewables L+175 5/31/25 17,804 17,804 18,241 FLNG Liquefaction 2, LLC Midstream L+150 12/31/26 27,780 27,780 27,624 Meikle Wind Energy, LP (e) Renewables C+150 5/12/24 C$ 15,637 12,029 11,585 NES Hercules Class B Member, LLC Renewables S+165 1/31/28 $ 24,317 24,317 24,764 ST EIP Holdco LLC Midstream L+250 11/5/24 58,421 58,421 58,156 Top of the World Wind Energy LLC Renewables S+188 12/1/28 18,373 18,373 19,050 Total Senior Secured Loans—First Lien 272,680 275,610 TOTAL INVESTMENTS—100.0% $ 272,680 $ 275,610 Sustainable Infrastructure Investments, LLC Portfolio As of December 31, 2022 Portfolio Company (a)(f) Footnotes Industry Rate (b) Maturity Principal (c) Amortized Fair (d) Senior Secured Loans—First Lien—100.0% Alianca Transportadora de Gas Participacoes S.A. Midstream L+260 5/23/27 $ 73,707 $ 73,707 $ 74,601 Blue Heron Intermediate Holdco I, LLC Midstream L+188 4/22/24 31,832 31,832 31,885 Cedar Creek II LLC Renewables L+188 11/18/23 8,710 8,710 8,722 Copper Mountain Solar 3, LLC Renewables L+175 5/31/25 17,804 17,804 17,879 FLNG Liquefaction 2, LLC Midstream L+150 12/31/26 28,170 28,170 27,990 Meikle Wind Energy, LP (e) Renewables C+150 5/12/24 C$ 16,030 12,332 11,873 NES Hercules Class B Member, LLC Renewables L+150 1/31/28 $ 24,487 24,487 24,954 ST EIP Holdco LLC Midstream L+250 11/5/24 58,673 58,673 58,288 Top of the World Wind Energy LLC Renewables L+188 12/1/28 18,373 18,373 18,866 Total Senior Secured Loans—First Lien 274,088 275,058 TOTAL INVESTMENTS—100.0% $ 274,088 $ 275,058 _____________________ Percentages are shown as a percentage of total investments. (a) Security may be an obligation of one or more entities affiliated with the named company. (b) Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of March 31, 2023 and December 31, 2022, the three-month LIBOR, or L , was 5.19% and 4.77%, respectively, the Canadian Dollar Offered Rate, or C , was 5.03% and 4.94%, respectively, and the SOFR, or S, was 4.91% and 4.59%, respectively. (c) Denominated in U.S. dollars unless otherwise noted. (d) Security is classified as Level 3 and fair value is determined in accordance with the Company’s valuation process. (e) Investment denominated in Canadian dollars. Amortized cost and fair value are converted into U.S. dollars as of March 31, 2023 and December 31, 2022. (f) Security or portion thereof is held within Seine Funding and is pledged as collateral supporting the amounts outstanding under the Seine Funding Facility. Below is selected balance sheet information for SIIJV as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Selected Balance Sheet Information Total investments, at fair value $ 275,610 $ 275,058 Cash and other assets 7,152 10,380 Total assets $ 282,762 $ 285,438 Debt $ 208,021 $ 213,583 Other liabilities 2,789 3,358 Total liabilities 210,810 216,941 Member's equity $ 71,952 $ 68,497 Below is selected statement of operations information for SIIJV for the three months ended March 31, 2023 and 2022: Three Months Ended 2023 2022 Selected Statement of Operations Information Total investment income $ 4,798 $ 11,463 Expenses Interest expense 3,141 6,994 Administrative services 43 166 Custodian and accounting fees 45 184 Professional services 50 125 Other 10 54 Total expenses 3,289 7,523 Net investment income 1,509 3,940 Net realized and unrealized gain (loss) 1,946 (821) Net increase (decrease) in net assets resulting from operations $ 3,455 $ 3,119

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
Fair Value of Financial Instruments (Tables)	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value Hierarchy of Investments	As of March 31, 2023 and December 31, 2022, the Company’s investments were categorized as follows in the fair value hierarchy: Valuation Inputs March 31, 2023 December 31, 2022 Level 1—Price quotations in active markets $ 5,011 $ 2,465 Level 2—Significant other observable inputs 229,247 450,445 Level 3—Significant unobservable inputs 1,508,403 1,594,205 Total $ 1,742,661 $ 2,047,115
Schedule of Fair Value Hierarchy of Assets and Liabilities	As of March 31, 2023 and December 31, 2022, the Company’s swap contracts were categorized as follows in the fair value hierarchy: March 31, 2023 December 31, 2022 Valuation Inputs Assets Liabilities Assets Liabilities Level 1—Price quotations in active markets $ — $ — $ — $ — Level 2—Significant other observable inputs 379 — — 698 Level 3—Significant unobservable inputs — — — — Total $ 379 $ — $ — $ 698
Fair Value of Assets Rollforward	The following is a reconciliation for the three months ended March 31, 2023 and 2022 of investments for which significant unobservable inputs (Level 3) were used in determining fair value: For the Three Months Ended March 31, 2023 Senior Secured Loans—First Lien Senior Secured Loans—Second Lien Senior Secured Bonds Unsecured Debt Preferred Equity Sustainable Infrastructure Investments, LLC Equity/Other Total Fair value at beginning of period $ 443,245 $ 143,270 $ 10,074 $ 54,374 $ 400,414 $ 51,098 $ 491,730 $ 1,594,205 Accretion of discount (amortization of premium) 349 81 12 29 579 — — 1,050 Net realized gain (loss) (2,806) 9 — 5 — — (15,008) (17,800) Net change in unrealized appreciation (depreciation) (5,939) 228 78 28 13,706 1,839 (47,355) (37,415) Purchases 24,949 — — — — — 83 25,032 Paid-in-kind interest 2,395 — — 2,107 — — — 4,502 Sales and repayments (8,110) (15,545) — (500) — — (37,826) (61,981) Transfers into Level 3 (1) — — — — — — 810 810 Transfers out of Level 3 — — — — — — — — Fair value at end of period $ 454,083 $ 128,043 $ 10,164 $ 56,043 $ 414,699 $ 52,937 $ 392,434 $ 1,508,403 The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date $ (8,789) $ 228 $ 78 $ 28 $ 13,706 $ 1,839 $ (57,832) $ (50,742) For the Three Months Ended March 31, 2022 Senior Secured Loans—First Lien Senior Secured Loans—Second Lien Senior Secured Bonds Unsecured Debt Preferred Equity Sustainable Infrastructure Equity/Other Total Fair value at beginning of period $ 414,075 $ 84,083 $ 10,371 $ 104,659 $ 497,288 $ 50,770 $ 460,236 $ 1,621,482 Accretion of discount (amortization of premium) 549 74 13 22 1,406 — — 2,064 Net realized gain (loss) (12,397) 434 — (27,729) 167 — — (39,525) Net change in unrealized appreciation (depreciation) 24,374 136 106 34,665 (940) 1,330 172,334 232,005 Purchases 17,642 63,250 — — — — 9,157 90,049 Paid-in-kind interest 1,097 — — 3,843 188 — — 5,128 Sales and repayments (74,622) (17,576) — (47,571) (14,462) — — (154,231) Transfers into Level 3 (1) 58,705 — — — — — — 58,705 Transfers out of Level 3 — — — — — — — — Fair value at end of period $ 429,423 $ 130,401 $ 10,490 $ 67,889 $ 483,647 $ 52,100 $ 641,727 $ 1,815,677 The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date $ 14,611 $ 359 $ 106 $ (22) $ (940) $ 1,330 $ 172,334 $ 187,778 ______________ (1) Changes in inputs or methodologies used for valuing investments may result in transfers into or out of levels within the fair value hierarchy. Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the reporting period. For the three months ended March 31, 2023 and 2022, transfers into Level 3 were due to decreased price transparency.
Schedule of Valuation Techniques and Significant Unobservable Inputs Used in Recurring Level 3 Fair Value	The valuation techniques and significant unobservable inputs used in recurring Level 3 fair value measurements as of March 31, 2023 and December 31, 2022 were as follows: Type of Investment Fair Value at March 31, 2023 (Unaudited) Valuation Technique (1) Unobservable Input Range Weighted Senior Secured Loans—First Lien $ 441,261 Market Comparables Market Yield (%) 8.3%-20.8% 12.3% EBITDA Multiples (x) 5.9x-6.2x 6.0x 12,822 Discounted Cash Flow Discount Rate (%) 7.5%-12.5% 10.0% Senior Secured Loans—Second Lien 128,043 Market Comparables Market Yield (%) 10.0%-13.3% 11.6% Senior Secured Bonds 10,164 Market Comparables Market Yield (%) 6.9%-7.9% 7.4% Unsecured Debt 18,818 Market Comparables Market Yield (%) 10.0%-11.0% 10.5% 37,225 Other (2) Preferred Equity 328,662 Market Comparables Market Yield (%) 10.3%-28.3% 18.8% EBITDA Multiples (x) 10.3x-11.3x 10.8x Net Aircraft Book Value Multiple (x) 1.0x-1.0x 1.0x 86,037 Discounted Cash Flow Discount Rate (%) 11.5%-12.0% 11.8% Sustainable Infrastructure Investments, LLC 52,937 Discounted Cash Flow Discount Rate (%) 13.5%-14.5% 14.0% Equity/Other 349,629 Market Comparables EBITDA Multiples (x) 3.8x-11.3x 4.9x Production Multiples (Mboe/d) $27,578.0-$31,344.0 $29,447.0 Proved Reserves Multiples (Mmboe) $5.8-$6.6 $6.2 Production Multiples (MMcfe/d) $2,850.0-$3,150.0 $3,000.0 Proved Reserves Multiples (Bcfe) 0.7x-0.7x 0.7x PV-10 Multiples (x) 0.3x-0.9x 0.8x 13,683 Discounted Cash Flow Discount Rate (%) 8.0%-33.0% 13.4% 7,488 Option Valuation Model Volatility (%) 28.1%-65.0% 37.1% 21,634 Other (2) Total $ 1,508,403 Type of Investment Fair Value at Valuation Technique (1) Unobservable Input Range Weighted Senior Secured Loans—First Lien $ 413,268 Market Comparables Market Yield (%) 8.5%-21.8% 12.3% EBITDA Multiples (x) 5.0x-7.5x 6.3x 29,977 Discounted Cash Flow Discount Rate (%) 11.5%-19.5% 15.4% Senior Secured Loans—Second Lien 143,270 Market Comparables Market Yield (%) 10.3%-14.3% 11.8% Senior Secured Bonds 10,074 Market Comparables Market Yield (%) 6.9%-7.9% 7.4% Unsecured Debt 19,256 Market Comparables Market Yield (%) 10.3%-11.3% 10.8% 35,118 Other (2) Preferred Equity 316,767 Market Comparables Market Yield (%) 8.8%-30.3% 19.0% EBITDA Multiples (x) 9.5x-10.5x 10.0x Net Aircraft Book Value Multiple (x) 1.0x-1.0x 1.0x 83,647 Discounted Cash Flow Discount Rate (%) 11.3%-12.3% 11.8% Sustainable Infrastructure Investments, LLC 51,098 Discounted Cash Flow Discount Rate (%) 13.5%-14.5% 14.0% Equity/Other 481,623 Market Comparables EBITDA Multiples (x) 1.8x-10.5x 5.4x Production Multiples (Mboe/d) $27,946.0-$37,500.0 $30,265.3 Proved Reserves Multiples (Mmboe) $6.9-$10.3 $7.6 Production Multiples (MMcfe/d) $3,400.0-$3,700.0 $3,550.0 Proved Reserves Multiples (Bcfe) 0.8x-0.9x 0.8x PV-10 Multiples (x) 0.5x-0.9x 0.8x 2,488 Discounted Cash Flow Discount Rate (%) 8.0%-33.0% 23.8% 5,734 Option Valuation Model Volatility (%) 31.5%-55.1% 36.6% 1,885 Other (2) Total $ 1,594,205 ______________ (1) Investments using a market quotes valuation technique were valued by using the midpoint of the prevailing bid and ask prices from dealers on the date of the relevant period end, which were provided by an independent third-party pricing service and screened for validity by such service. For investments utilizing a market comparables valuation technique, a significant increase (decrease) in the market yield, in isolation, would result in a significantly lower (higher) fair value measurement, and a significant increase (decrease) in any of the valuation multiples, in isolation, would result in a significantly higher (lower) fair value measurement. For investments utilizing a discounted cash flow valuation technique, a significant increase (decrease) in the discount rate, in isolation, would result in a significantly lower (higher) fair value measurement. For investments utilizing an option valuation model valuation technique, a significant increase (decrease) in the volatility, in isolation, would result in a significantly higher (lower) fair value measurement. (2) Fair valued based on expected outcome of proposed corporate transactions, the expected value of the liquidation preference of the investment or other factors.

Financing Arrangements (Tables)

Financing Arrangements (Tables)	3 Months Ended
Financing Arrangements (Tables)	Mar. 31, 2023
Debt Disclosure [Abstract]
Schedule of Outstanding Financing Arrangements	The following tables present a summary of information with respect to the Company’s outstanding financing arrangements as of March 31, 2023 and December 31, 2022. For additional information regarding these financing arrangements, see the notes to the Company’s audited consolidated financial statements contained in its annual report on Form 10-K for the year ended December 31, 2022. Any significant changes to the Company’s financing arrangements during the three months ended March 31, 2023 are discussed below. As of March 31, 2023 Arrangement (1) Type of Arrangement Rate (2) Amount Amount Maturity Date Senior Secured Notes (3)(5) Bond 7.50% $ 457,075 $ — August 15, 2023 Total $ 457,075 $ — As of December 31, 2022 Arrangement (1) Type of Arrangement Rate (2) Amount Amount Maturity Date JPMorgan Facility Term Loan L+3.00% $ 305,676 $ — February 16, 2023 (4) Senior Secured Notes (3) Bond 7.50% 457,075 — August 15, 2023 Total $ 762,751 $ — ______________________ (1) The carrying amount outstanding under the facility approximates its fair value, unless otherwise noted. (2) LIBOR is subject to a 0.00% floor. (3) As of March 31, 2023 and December 31, 2022 , the fair value of the Senior Secured Notes was approximately $457,569 and $458,908, respectively. These valuations are considered Level 2 valuations within the fair value hierarchy. (4) On February 14, 2023, the Company repaid and terminated the JPMorgan Facility. (5) On April 14, 2023, the Company delivered notice of its intention to redeem 100% of the issued and outstanding Senior Secured Notes on May 15, 2023 at a price equal to 100% of the principal amount of the notes being redeemed, plus any accrued but unpaid interest, if any, to, but excluding, May 15, 2023.
Schedule of Interest Expense	For the three months ended March 31, 2023 and 2022, the components of total interest expense for the Company's financing arrangements were as follows: Three Months Ended 2023 2022 Arrangement (1) Direct Interest Expense (2) Amortization of Deferred Financing Costs and Discount Total Interest Expense Direct Interest Expense (2) Amortization of Deferred Financing Costs and Discount Total Interest Expense JPMorgan Facility (3) $ 2,790 $ 238 $ 3,028 $ 2,405 $ 905 $ 3,310 Senior Secured Notes (4) 8,570 1,000 9,570 9,104 1,280 10,384 Total $ 11,360 $ 1,238 $ 12,598 $ 11,509 $ 2,185 $ 13,694 ___________________ (1) Borrowings of each of the Company's wholly-owned special-purpose financing subsidiaries are considered borrowings of the Company for purposes of complying with the asset coverage requirements applicable to BDCs under the 1940 Act. (2) Direct interest expense includes the effect of non-usage fees, administration fees and make-whole fees, if any. (3) On February 14, 2023, the Company repaid and terminated the JPMorgan Facility. (4) On April 14, 2023, the Company delivered notice of its intention to redeem 100% of the issued and outstanding Senior Secured Notes on May 15, 2023 at a price equal to 100% of the principal amount of the notes being redeemed, plus any accrued but unpaid interest, if any, to, but excluding, May 15, 2023.

Financial Highlights (Tables)

Financial Highlights (Tables)	3 Months Ended
Financial Highlights (Tables)	Mar. 31, 2023
Investment Company [Abstract]
Schedule of Financial Highlights	The following is a schedule of financial highlights of the Company for the three months ended March 31, 2023 and the year ended December 31, 2022: Three Months Ended (Unaudited) Year Ended December 31, 2022 Per Share Data: (1) Net asset value, beginning of period $ 3.88 $ 3.59 Results of operations (2) Net investment income 0.04 0.16 Net realized gain (loss) and unrealized appreciation (depreciation) (0.11) 0.25 Net increase (decrease) in net assets resulting from operations (0.07) 0.41 Shareholder distributions (3) Distributions from net investment income (0.03) (0.12) Net decrease in net assets resulting from shareholder distributions (0.03) (0.12) Capital share transactions Issuance of common shares (4) — — Net increase (decrease) in net assets resulting from capital share transactions — — Net asset value, end of period $ 3.78 $ 3.88 Shares outstanding, end of period 452,787,008 451,465,673 Total return (5) (1.82) % 11.39 % Total return (without assuming reinvestment of distributions) (5) (1.80) % 11.29 % Ratio/Supplemental Data: Net assets, end of period $ 1,712,828 $ 1,753,748 Ratio of net investment income to average net assets (6)(7) 3.84 % 4.02 % Ratio of total operating expenses to average net assets (6) 5.93 % 6.78 % Ratio of management fee offset to average net assets (6) (0.01) % (0.15) % Ratio of net operating expenses to average net assets (6) 5.92 % 6.63 % Ratio of interest expense to average net assets (6) 2.85 % 3.21 % Portfolio turnover (8) 1.30 % 16.15 % Total amount of senior securities outstanding, exclusive of treasury securities $ 457,075 $ 762,751 Asset coverage per unit (9) 4.75 3.30 _________________________ (1) Per share data may be rounded in order to recompute the ending net asset value per share. (2) The per share data was derived by using the weighted average shares outstanding during the applicable period. (3) The per share data for distributions reflects the actual amount of distributions paid per share during the applicable period. (4) The issuance of common shares on a per share basis reflects the incremental net asset value changes as a result of the issuance of common shares pursuant to the Company’s distribution reinvestment plan. The issuance of common shares at a price that is greater than the net asset value per share results in an increase in net asset value per share. (5) The total return for each period presented was calculated based on the change in net asset value during the applicable period, including the impact of distributions reinvested in accordance with the Company’s distribution reinvestment plan. The total return (without assuming reinvestment of distributions) for each period presented was calculated by taking the net asset value per share as of the end of the applicable period, adding the cash distributions per share which were declared during the applicable period and dividing the total by the net asset value per share at the beginning of the applicable period. The total returns do not consider the effect of any sales commissions or charges that may be incurred in connection with the sale of the Company’s common shares. The total returns include the effect of the issuance of common shares at a net offering price that is greater than net asset value per share, which causes an increase in net asset value per share. The historical calculations of total returns in the table should not be considered representations of the Company’s future total returns, which may be greater or less than the returns shown in the table due to a number of factors, including the Company’s ability or inability to make investments in companies that meet its investment criteria, the interest rates payable on the debt securities the Company acquires, the level of the Company’s expenses, variations in and the timing of the recognition of realized and unrealized gains or losses, the degree to which the Company encounters competition in its markets and general economic conditions. As a result of these factors, results for any previous period should not be relied upon as being indicative of performance in future periods. The total return calculations set forth above represent the total returns on the Company’s investment portfolio during the applicable period and do not represent actual returns to shareholders. (6) Weighted average net assets during the applicable period are used for this calculation. Ratios for the three months ended March 31, 2023 are annualized. Annualized ratios for the three months ended March 31, 2023 are not necessarily indicative of the ratios that may be expected for the year ending December 31, 2023. (7) If FS/EIG Advisor had not agreed to offset the amount of any structuring, upfront or certain other fees it or its members received against the management fee payable by the Company, the ratio of net investment income to average net assets would have been 3.83% and 3.87% for the three months ended March 31, 2023 and the year ended December 31, 2022, respectively. See Note 4 for a discussion of the management fee offset with FS/EIG Advisor. (8) Portfolio turnover for the three months ended March 31, 2023 is not annualized. (9) Asset coverage per unit is the ratio of the carrying value of the Company’s total consolidated assets, less liabilities and indebtedness not represented by senior securities, to the aggregate amount of senior securities representing indebtedness.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - Affiliated Entity	3 Months Ended
	Mar. 31, 2023
Investment Advisory Agreement - Incentive Rate, Realized Capital Gains
Incentive fee (in percent)	20%
Investment Advisory Agreement - Incentive Rate, Quarterly In Arrears Catch-up Threshold
Incentive fee (in percent)	20%
Investment Advisory Agreement - Incentive Rate, Quarterly Catch-up Threshold
Incentive fee (in percent)	1.625%
Investment Advisory Agreement - Incentive Rate, Annualized Hurdle Rate
Incentive fee (in percent)	6.50%
Investment Advisory Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold
Incentive fee (in percent)	2.031%
Investment Advisory Agreement - Incentive Rate, Annualized Catch-Up Threshold
Incentive fee (in percent)	8.125%

Share Transactions - Schedule o

Share Transactions - Schedule of Common Stock Transactions (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Equity [Abstract]
Reinvestment of Distributions (in shares)		1,321,335	1,434,432
Reinvestment of Distributions	[1]	$ 5,218	$ 5,235
Proceeds from Share Transactions (in shares)		1,321,335	1,434,432
Proceeds from Share Transactions		$ 5,218	$ 5,235

[1]See Note 3 for a discussion of the Company's common share transactions.

Share Transactions - Narrative

Share Transactions - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended
		May 05, 2017	May 04, 2017	May 10, 2023	Mar. 31, 2023	Mar. 31, 2022
Class of Stock [Line Items]
Stock repurchased and distributed (in shares)					1,321,335	1,434,432
Stock reinvestment of distributions	[1]				$ 5,218	$ 5,235
Distribution Reinvestment Plan
Class of Stock [Line Items]
Weighted average number of common shares outstanding in prior year		10%	10%
Weighted average number of common shares outstanding		2.50%	2.50%
Distribution reinvestment plan term		12 months
Distribution reinvestment plan term expiree		3 months
Share distribution not more than net asset value per common share					2.50%
Termination period					30 days
Minimum investment threshold					$ 5
Written notice period					30 days
Distribution Reinvestment Plan \| Subsequent Event
Class of Stock [Line Items]
Stock repurchased and distributed (in shares)				1,342,539
Stock reinvestment of distributions				$ 5,170
Average cost per share of stock repurchased and distributed (in USD per share)				$ 3.85

[1]See Note 3 for a discussion of the Company's common share transactions.

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Related Party Transaction [Line Items]
Investment company, contractual fee waived	[1]	$ 255	$ 698
Investment Advisory Agreement \| Affiliated Entity
Related Party Transaction [Line Items]
Management and service fees, base rate		1.75%
Investment company, contractual fee waived		$ 255	$ 698

[1]See Note 4 for a discussion of the offset by FS/EIG Advisor, LLC, the Company's investment adviser, of certain management fees to which it was otherwise entitled during the applicable period.

Related Party Transactions - Sc

Related Party Transactions - Schedule of the Fees and Expenses Accrued (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Administrative Services Expenses		$ 1,320	$ 1,420
Management fees		10,474	10,735
Investment company, contractual fee waived	[1]	255	698
Management fees payable		10,219		$ 11,185
Affiliated Entity \| Investment Advisory Agreement
Related Party Transaction [Line Items]
Base Management Fee		10,219	10,037
Management fees		11,185	10,466
Investment company, contractual fee waived		255	698
Management fees payable		10,219
Accounting and administrative fees		645	638
Payment for administrative services expenses		1,458	1,121
Affiliated Entity \| Administrative Services Expense
Related Party Transaction [Line Items]
Administrative Services Expenses		$ 1,320	$ 1,420

[1]See Note 4 for a discussion of the offset by FS/EIG Advisor, LLC, the Company's investment adviser, of certain management fees to which it was otherwise entitled during the applicable period.

Distributions - Cash Distributi

Distributions - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Distributions (in USD per share)		$ 0.03	$ 0.03	$ 0.12
Total	[1]	$ 13,584	$ 13,426

[1]See Note 5 for a discussion of the sources of distributions paid by the Company.

Distributions - Narrative (Deta

Distributions - Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) distribution $ / shares	Mar. 31, 2022 $ / shares	Dec. 31, 2022 USD ($) distribution $ / shares	Dec. 31, 2021 distribution	Dec. 31, 2020 distribution
Investment Company, Changes in Net Assets [Line Items]
Cash distributions declared amount \| distribution	1		4	4	3
Distributions (in USD per share) \| $ / shares	$ 0.03	$ 0.03	$ 0.12
Short-term and long-term capital loss carryforwards	$ (69,270)		$ (1,248,683)
Unrealized appreciation	276,302		334,635
Unrealized depreciation	471,400		512,206
Income tax purposes	1,938,093		2,223,943
Net unrealized appreciation (depreciation)	(195,432)		(176,828)
Subsidiaries
Investment Company, Changes in Net Assets [Line Items]
Deferred tax asset	145,397		145,383
Deferred tax liability	19,413		28,753
Deferred tax asset offset by valuation allowance	125,984		116,630
Current income tax	$ 0		$ 1,207

Distributions - Cash Distribu_2

Distributions - Cash Distributions on Common Stock (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Distribution Amount
Net investment income		$ 13,584	$ 13,426
Short-term capital gains proceeds from the sale of assets		0	0
Long-term capital gains proceeds from the sale of assets		0	0
Total	[1]	$ 13,584	$ 13,426
Percentage
Net investment income		100%	100%
Short-term capital gains proceeds from the sale of assets		0%	0%
Long-term capital gains proceeds from the sale of assets		0%	0%
Total		100%	100%
Gross investment income attributable to cash income earned		86.60%	80.10%
Gross investment income attributable to paid-in-kind interest		10.50%	14.30%
Gross investment income attributable to non-cash accretion of discount		2.90%	5.60%

[1]See Note 5 for a discussion of the sources of distributions paid by the Company.

Financial Instruments - Schedul

Financial Instruments - Schedule of Fixed Price Swap Positions (Details)	3 Months Ended
	Mar. 31, 2023 MMBTU $ / bbl $ / MMBTU bbl
Swap Contracts—Crude Oil
Derivatives, Fair Value [Line Items]
Notional volume of fixed price swap contracts-crude oil \| bbl	153,486
Swap Contracts—Crude Oil \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, volume \| bbl	123,680
Weighted Average Price \| $ / bbl	80
Swap Contracts—Natural Gas
Derivatives, Fair Value [Line Items]
Notional volume of fixed price swap contracts-natural gas \| MMBTU	285,889
Swap Contracts—Natural Gas \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Weighted Average Price \| $ / MMBTU	3.80
Notional amount, energy \| MMBTU	227,542

Financial Instruments - Fair Va

Financial Instruments - Fair Value of Open Swap Contracts (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative Assets	$ 379	$ 0
Derivative Liabilities	0	(698)
Swap Contracts—Crude Oil
Derivative [Line Items]
Derivative Assets	161	0
Derivative Liabilities	0	(572)
Swap Contracts—Natural Gas
Derivative [Line Items]
Derivative Assets	218	0
Derivative Liabilities	$ 0	$ (126)

Financial Instruments - Stateme

Financial Instruments - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain (loss) on swap contracts	$ 12	$ (416)
Net Change in Unrealized Appreciation (Depreciation)	1,077	(3,482)
Swap Contracts—Crude Oil
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain (loss) on swap contracts	(100)	(392)
Net Change in Unrealized Appreciation (Depreciation)	733	(2,976)
Swap Contracts—Natural Gas
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized gain (loss) on swap contracts	112	(24)
Net Change in Unrealized Appreciation (Depreciation)	$ 344	$ (506)

Financial Instruments - Derivat

Financial Instruments - Derivative Assets and Liabilities by Counterparty (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 379	$ 0
Derivative Liabilities	0	(698)
BP Energy Co
Derivatives, Fair Value [Line Items]
Derivative Assets	379	0
Derivative Liabilities	0	(698)
Net Value of Derivatives	379	(698)
Non-Cash Collateral (Received) Pledged	0	0
Cash Collateral (Received) Pledged	0	0
Net Amount of Derivative Assets (Liabilities)	$ 379	$ (698)

Investment Portfolio - Schedule

Investment Portfolio - Schedule Of Investment Portfolio At Cost And Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023		Dec. 31, 2022
Schedule of Investments [Line Items]
Amortized Cost	$ 1,648,959	[1],[2]	$ 1,922,940	[3]
Fair Value	1,742,661	[1],[2],[4]	2,047,115	[3],[5]
Net Senior Secured Loans—First Lien
Schedule of Investments [Line Items]
Amortized Cost	603,363	[1],[2]	702,842	[3]
Fair Value	599,454	[1],[2],[4]	706,646	[3],[5]
Net Senior Secured Loans—Second Lien
Schedule of Investments [Line Items]
Amortized Cost	127,698	[1],[2]	143,153	[3]
Fair Value	128,043	[1],[2],[4]	143,270	[3],[5]
Senior Secured Bonds
Schedule of Investments [Line Items]
Amortized Cost	10,076	[1],[2]	10,064	[3]
Fair Value	10,164	[1],[2],[4]	10,074	[3],[5]
Unsecured Debt
Schedule of Investments [Line Items]
Amortized Cost	143,504		253,675
Fair Value	139,919		241,418
Preferred Equity
Schedule of Investments [Line Items]
Amortized Cost	425,761	[1],[2]	425,182	[3]
Fair Value	414,699	[1],[2],[4]	400,414	[3],[5]
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Amortized Cost	54,514	[1],[2]	54,514	[3]
Fair Value	52,937	[1],[2],[4]	51,098	[3],[5]
Equity/Other
Schedule of Investments [Line Items]
Amortized Cost	284,043		333,510
Fair Value	$ 397,445		$ 494,195
Percentage of Portfolio \| Customer Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	100%		100%
Percentage of Portfolio \| Customer Concentration Risk \| Net Senior Secured Loans—First Lien
Schedule of Investments [Line Items]
Percentage of Portfolio	34%		35%
Percentage of Portfolio \| Customer Concentration Risk \| Net Senior Secured Loans—Second Lien
Schedule of Investments [Line Items]
Percentage of Portfolio	7%		7%
Percentage of Portfolio \| Customer Concentration Risk \| Senior Secured Bonds
Schedule of Investments [Line Items]
Percentage of Portfolio	1%		0%
Percentage of Portfolio \| Customer Concentration Risk \| Unsecured Debt
Schedule of Investments [Line Items]
Percentage of Portfolio	8%		12%
Percentage of Portfolio \| Customer Concentration Risk \| Preferred Equity
Schedule of Investments [Line Items]
Percentage of Portfolio	24%		20%
Percentage of Portfolio \| Customer Concentration Risk \| Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Percentage of Portfolio	3%		2%
Percentage of Portfolio \| Customer Concentration Risk \| Equity/Other
Schedule of Investments [Line Items]
Percentage of Portfolio	23%		24%

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]Security may be an obligation of one or more entities affiliated with the named company.[4]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.

Investment Portfolio - Narrativ

Investment Portfolio - Narrative (Details) $ in Thousands, $ in Thousands				3 Months Ended
		Jan. 02, 2020 USD ($)	Jan. 02, 2020 CAD ($)	Mar. 31, 2023 USD ($) investment company		Mar. 31, 2023 CAD ($) investment company		Dec. 31, 2022 USD ($) company investment		Dec. 31, 2022 CAD ($) company investment
Schedule of Investments [Line Items]
Unfunded commitment with amortized cost				$ 2,500				$ 2,500
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 1
Schedule of Investments [Line Items]
Principal amount				$ 22,902	[1],[2],[3],[4],[5],[6]			$ 22,734	[7],[8],[9],[10],[11]
Floor rate				1.50%	[2],[3],[4],[5],[6],[12]	1.50%	[2],[3],[4],[5],[6],[12]	1.50%	[8],[9],[10],[11],[13]	1.50%	[8],[9],[10],[11],[13]
Variable rate				4%	[2],[3],[4],[5],[6],[12]	4%	[2],[3],[4],[5],[6],[12]	4%	[8],[9],[10],[11]	4%	[8],[9],[10],[11]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 2
Schedule of Investments [Line Items]
Principal amount				$ 5,359	[1],[2],[3],[4],[5],[6],[14]			$ 5,359	[7],[8],[9],[10],[11],[15]
Floor rate				1.50%	[2],[3],[4],[5],[6],[12],[14]	1.50%	[2],[3],[4],[5],[6],[12],[14]	1.50%	[8],[9],[10],[11],[13],[15]	1.50%	[8],[9],[10],[11],[13],[15]
Variable rate				4%	[2],[3],[4],[5],[6],[12],[14]	4%	[2],[3],[4],[5],[6],[12],[14]	4%	[8],[9],[10],[11],[15]	4%	[8],[9],[10],[11],[15]
Investment, Identifier [Axis]: Aethon III BR LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 20,000	[1],[2],[3],[5]			$ 20,000	[7],[8],[9],[16]
Floor rate				1.50%	[2],[3],[5],[12]	1.50%	[2],[3],[5],[12]	1.50%	[8],[9],[13],[16]	1.50%	[8],[9],[13],[16]
Variable rate				7.50%	[2],[3],[5],[12]	7.50%	[2],[3],[5],[12]	7.50%	[8],[9],[16]	7.50%	[8],[9],[16]
Investment, Identifier [Axis]: Aethon United BR LP, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 40,500	[1],[3],[5]			$ 40,500	[7],[9],[16]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 1
Schedule of Investments [Line Items]
Principal amount				7,553	[1],[2],[3],[5],[17]			8,436	[7],[8],[9],[16],[18]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 2
Schedule of Investments [Line Items]
Principal amount				2,500	[1],[2],[3],[5],[14],[17]			2,500	[7],[8],[9],[15],[18]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Service & Equipment
Schedule of Investments [Line Items]
Principal amount				63,888	[1],[2],[3],[5],[17]			63,888	[7],[8],[9],[16],[18]
Investment, Identifier [Axis]: Archrock Partners, L.P., Midstream
Schedule of Investments [Line Items]
Principal amount	[7],[9],[11],[16]							3,098
Investment, Identifier [Axis]: Brazos Delaware II LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	[7],[9]							$ 39,259
Variable rate	[9]							4%		4%
Investment, Identifier [Axis]: CPV Maryland, LLC, Power
Schedule of Investments [Line Items]
Principal amount	[7],[9]							$ 14,286
Floor rate	[9],[13]							1%		1%
Variable rate	[9]							4%		4%
Investment, Identifier [Axis]: CPV Shore Holdings LLC, Power
Schedule of Investments [Line Items]
Principal amount				$ 23,601	[1],[3],[5]			$ 23,601	[7],[9]
Variable rate				3.75%	[3],[5],[12]	3.75%	[3],[5],[12]	3.75%	[9]	3.75%	[9]
Investment, Identifier [Axis]: Cimarron Energy Inc., Service & Equipment
Schedule of Investments [Line Items]
Principal amount	[7],[8],[9],[16],[19],[20]							$ 7,500
Floor rate	[8],[9],[13],[16],[19],[20]							1%		1%
Variable rate	[8],[9],[16],[19],[20]							9%		9%
Investment, Identifier [Axis]: Citizen Energy Operating, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 38,000	[1],[2],[3],[5]			$ 39,000	[7],[8],[9],[16]
Floor rate				1%	[2],[3],[5],[12]	1%	[2],[3],[5],[12]	1%	[8],[9],[13],[16]	1%	[8],[9],[13],[16]
Variable rate				7.65%	[2],[3],[5],[12]	7.65%	[2],[3],[5],[12]	7.65%	[8],[9],[16]	7.65%	[8],[9],[16]
Investment, Identifier [Axis]: Compass Power Generation LLC, Power
Schedule of Investments [Line Items]
Principal amount				$ 9,798	[1],[3],[5]			$ 31,575	[7],[9]
Floor rate				1%	[3],[5],[12]	1%	[3],[5],[12]	1%	[9],[13]	1%	[9],[13]
Variable rate				4.25%	[3],[5],[12]	4.25%	[3],[5],[12]	4.25%	[9]	4.25%	[9]
Investment, Identifier [Axis]: Cox Oil Offshore, LLC, Volumetric Production Payments, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 100,000	[1],[2],[3],[5],[21],[22]			$ 100,000	[7],[8],[9],[23],[24]
Investment, Identifier [Axis]: EIF Van Hook Holdings, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 26,882	[1],[3],[5]			$ 26,882	[7],[9]
Variable rate				5.25%	[3],[5],[12]	5.25%	[3],[5],[12]	5.25%	[9]	5.25%	[9]
Investment, Identifier [Axis]: ERA II Minerals, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 36,000	[1],[2],[3],[5]			$ 37,000	[7],[8],[9],[16]
Floor rate				0.80%	[2],[3],[5],[12]	0.80%	[2],[3],[5],[12]	0.80%	[8],[9],[13],[16]	0.80%	[8],[9],[13],[16]
Variable rate				6.25%	[2],[3],[5],[12]	6.25%	[2],[3],[5],[12]	6.25%	[8],[9],[16]	6.25%	[8],[9],[16]
Investment, Identifier [Axis]: Earthstone Energy Holdings, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 11,400	[1],[3],[5],[6]			$ 11,400	[7],[9],[11]
Investment, Identifier [Axis]: Endeavor Energy Resources, L.P., Upstream
Schedule of Investments [Line Items]
Principal amount	[7],[9],[16]							24,299
Investment, Identifier [Axis]: FR BR Holdings LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 81,316	[1],[2],[3],[5]			$ 81,582	[7],[8],[9],[16]
Variable rate				6.50%	[2],[3],[5],[12]	6.50%	[2],[3],[5],[12]	6.50%	[8],[9],[16]	6.50%	[8],[9],[16]
Investment, Identifier [Axis]: FR XIII PAA Holdings HoldCo, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 17,272	[1],[2],[3],[5]			$ 17,347	[7],[8],[9]
Floor rate				0.50%	[2],[3],[5],[12]	0.50%	[2],[3],[5],[12]	0.50%	[8],[9],[13]	0.50%	[8],[9],[13]
Variable rate				7.50%	[2],[3],[5],[12]	7.50%	[2],[3],[5],[12]	7.50%	[8],[9]	7.50%	[8],[9]
Investment, Identifier [Axis]: GIP II Blue Holding LP, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 5,812	[1],[3],[5]			$ 5,918	[7],[9]
Floor rate				1%	[3],[5],[12]	1%	[3],[5],[12]	1%	[9],[13]	1%	[9],[13]
Variable rate				4.50%	[3],[5],[12]	4.50%	[3],[5],[12]	4.50%	[9]	4.50%	[9]
Investment, Identifier [Axis]: GasLog Ltd., Midstream
Schedule of Investments [Line Items]
Principal amount				$ 14,648	[1],[2],[3],[5],[6]			$ 14,648	[7],[8],[9],[11]
Variable rate	[8],[9],[11]							7.75%		7.75%
Investment, Identifier [Axis]: Generation Bridge LLC, Power 1
Schedule of Investments [Line Items]
Principal amount				$ 7,092	[1],[3],[5]			$ 7,432	[7],[9]
Floor rate				0.80%	[3],[5],[12]	0.80%	[3],[5],[12]	0.80%	[9],[13]	0.80%	[9],[13]
Variable rate				5%	[3],[5],[12]	5%	[3],[5],[12]	5%	[9]	5%	[9]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 2
Schedule of Investments [Line Items]
Principal amount				$ 163	[1],[3],[5]			$ 163	[7],[9]
Floor rate				0.80%	[3],[5],[12]	0.80%	[3],[5],[12]	0.80%	[9],[13]	0.80%	[9],[13]
Variable rate				5%	[3],[5],[12]	5%	[3],[5],[12]	5%	[9]	5%	[9]
Investment, Identifier [Axis]: Goodnight Water Solutions, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 14,925	[1],[2],[3],[5]			$ 14,963	[7],[8],[9]
Floor rate				0.50%	[2],[3],[5],[12]	0.50%	[2],[3],[5],[12]	0.50%	[8],[9],[13]	0.50%	[8],[9],[13]
Variable rate				7%	[2],[3],[5],[12]	7%	[2],[3],[5],[12]	7.25%	[8],[9]	7.25%	[8],[9]
Investment, Identifier [Axis]: Hamilton Intermediate Holdings, LLC, Power
Schedule of Investments [Line Items]
Principal amount				$ 31,655	[1],[2],[3],[5]			$ 30,391	[7],[8],[9]
Investment, Identifier [Axis]: Hammerhead Resources Inc., Upstream
Schedule of Investments [Line Items]
Principal amount				37,225	[1],[2],[3],[5],[6]			$ 35,118	[7],[8],[9],[11],[16]
Variable rate	[8],[9],[11],[16]							12%		12%
Investment, Identifier [Axis]: Medallion Midland Acquisition LP, Midstream
Schedule of Investments [Line Items]
Principal amount	[7],[9]							$ 7,920
Floor rate	[9],[13]							0.80%		0.80%
Variable rate	[9]							3.75%		3.75%
Investment, Identifier [Axis]: Meritage Midstream Services II, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	[1],[2],[3],[5]			$ 25,000
Floor rate	[3],[5],[12]			1%		1%
Variable rate	[3],[5],[12]			6.75%		6.75%
Investment, Identifier [Axis]: Moss Creek Resources, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 11,693	[1],[3],[5]			$ 11,693	[7],[9],[16]
Investment, Identifier [Axis]: NRG Energy, Inc., Power
Schedule of Investments [Line Items]
Principal amount				16,125	[1],[3],[5],[6]			19,125	[7],[9],[11]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 1
Schedule of Investments [Line Items]
Principal amount				$ 19,108	[1],[2],[3],[5]			$ 18,659	[7],[8],[9]
Floor rate				1%	[2],[3],[5],[12]	1%	[2],[3],[5],[12]	1%	[8],[9],[13]	1%	[8],[9],[13]
Variable rate				5.25%	[2],[3],[5],[12]	5.25%	[2],[3],[5],[12]	5.25%	[8],[9]	5.25%	[8],[9]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 2
Schedule of Investments [Line Items]
Principal amount				$ 10,892	[1],[2],[3],[5],[14]			$ 11,341	[7],[8],[9],[15]
Floor rate				1%	[2],[3],[5],[12],[14]	1%	[2],[3],[5],[12],[14]	1%	[8],[9],[13],[15]	1%	[8],[9],[13],[15]
Variable rate				5.25%	[2],[3],[5],[12],[14]	5.25%	[2],[3],[5],[12],[14]	5.25%	[8],[9],[15]	5.25%	[8],[9],[15]
Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 26,289	[1],[3],[5]			$ 32,357	[7],[9],[16]
Floor rate				0.50%	[3],[5],[12]	0.50%	[3],[5],[12]	0.50%	[9],[13],[16]	0.50%	[9],[13],[16]
Variable rate				3.25%	[3],[5],[12]	3.25%	[3],[5],[12]	3.25%	[9],[16]	3.25%	[9],[16]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 1
Schedule of Investments [Line Items]
Principal amount				$ 5,760	[1],[3],[5]			$ 5,760	[7],[9]
Floor rate				0.80%	[3],[5],[12]	0.80%	[3],[5],[12]	0.80%	[9],[13]	0.80%	[9],[13]
Variable rate				4.75%	[3],[5],[12]	4.75%	[3],[5],[12]	4.75%	[9]	4.75%	[9]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 2
Schedule of Investments [Line Items]
Principal amount				$ 43,800	[1],[3],[5]			$ 43,910	[7],[9]
Floor rate				0.80%	[3],[5],[12]	0.80%	[3],[5],[12]	0.80%	[9],[13]	0.80%	[9],[13]
Variable rate				4.75%	[3],[5],[12]	4.75%	[3],[5],[12]	4.75%	[9]	4.75%	[9]
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 1
Schedule of Investments [Line Items]
Principal amount	[7],[8],[9],[16]							$ 13,545
Floor rate	[8],[9],[13],[16]							1.50%		1.50%
Variable rate	[8],[9],[16]							6.75%		6.75%
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 2
Schedule of Investments [Line Items]
Principal amount	[7],[8],[9],[15]							$ 1,505
Floor rate	[8],[9],[13],[15]							1.50%		1.50%
Variable rate	[8],[9],[15]							6.75%		6.75%
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 4,791	[1],[2],[3],[5],[25]			$ 4,767	[7],[8],[9],[16],[26]
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 1
Schedule of Investments [Line Items]
Principal amount	[7],[9]							26,365
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 2
Schedule of Investments [Line Items]
Principal amount	[7],[9],[16]							5,200
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 1
Schedule of Investments [Line Items]
Principal amount				$ 9,370	[1],[2],[3],[5]			$ 9,370	[7],[8],[9]
Floor rate				1%	[2],[3],[5],[12]	1%	[2],[3],[5],[12]	1%	[8],[9],[13]	1%	[8],[9],[13]
Variable rate				6.75%	[2],[3],[5],[12]	6.75%	[2],[3],[5],[12]	6.75%	[8],[9]	6.75%	[8],[9]
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 2
Schedule of Investments [Line Items]
Principal amount				$ 2,477	[1],[2],[3],[5],[14]			$ 2,477	[7],[8],[9],[15]
Floor rate				1%	[2],[3],[5],[12],[14]	1%	[2],[3],[5],[12],[14]	1%	[8],[9],[13],[15]	1%	[8],[9],[13],[15]
Variable rate				6.75%	[2],[3],[5],[12],[14]	6.75%	[2],[3],[5],[12],[14]	6.75%	[8],[9],[15]	6.75%	[8],[9],[15]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Letter of Credit, Power
Schedule of Investments [Line Items]
Principal amount				$ 2,709	[1],[2],[3],[5],[14]			$ 2,709	[7],[8],[9],[15]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 1
Schedule of Investments [Line Items]
Principal amount				12,704	[1],[2],[3],[5]			12,121	[7],[8],[9],[16]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 2
Schedule of Investments [Line Items]
Principal amount				3,827	[1],[2],[3],[5],[27]			3,643	[7],[8],[9],[16]
Investment, Identifier [Axis]: Potomac Energy Center, LLC, Power
Schedule of Investments [Line Items]
Principal amount				$ 58,164	[1],[2],[3],[5]			$ 58,459	[7],[8],[9]
Floor rate				0.50%	[2],[3],[5],[12]	0.50%	[2],[3],[5],[12]	0.50%	[8],[9],[13]	0.50%	[8],[9],[13]
Variable rate				6%	[2],[3],[5],[12]	6%	[2],[3],[5],[12]	6%	[8],[9]	6%	[8],[9]
Investment, Identifier [Axis]: Ranger Oil Corp., Upstream
Schedule of Investments [Line Items]
Principal amount	[7],[9],[11]							$ 29,772
Investment, Identifier [Axis]: ST EIP Holdings Inc., Midstream
Schedule of Investments [Line Items]
Principal amount				$ 10,526	[1],[2],[3],[5]			10,526	[7],[8],[9]
Investment, Identifier [Axis]: SilverBow Resources, Inc., Upstream
Schedule of Investments [Line Items]
Principal amount				$ 14,250	[1],[2],[3],[5],[6]			$ 14,250	[7],[8],[9],[11],[16]
Floor rate				1%	[2],[3],[5],[6],[12]	1%	[2],[3],[5],[6],[12]	1%	[8],[9],[11],[13],[16]	1%	[8],[9],[11],[13],[16]
Variable rate				7.50%	[2],[3],[5],[6],[12]	7.50%	[2],[3],[5],[6],[12]	7.50%	[8],[9],[11],[16]	7.50%	[8],[9],[11],[16]
Investment, Identifier [Axis]: Sitio Royalties Operating Partnership, LP, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 19,000	[1],[2],[3],[5],[6]			$ 19,500	[7],[8],[9],[11],[16]
Floor rate				1.50%	[2],[3],[5],[6],[12]	1.50%	[2],[3],[5],[6],[12]	1.50%	[8],[9],[11],[13],[16]	1.50%	[8],[9],[11],[13],[16]
Variable rate				5.75%	[2],[3],[5],[6],[12]	5.75%	[2],[3],[5],[6],[12]	6.50%	[8],[9],[11],[16]	6.50%	[8],[9],[11],[16]
Investment, Identifier [Axis]: Suburban Propane Partners LP, Midstream
Schedule of Investments [Line Items]
Principal amount	[7],[9],[11],[16]							$ 7,590
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC, Power
Schedule of Investments [Line Items]
Principal amount				$ 60,603	[1],[2],[3],[5],[6],[17],[28]			60,603	[8],[9],[18],[29]
Investment, Identifier [Axis]: Tallgrass Energy Partners, LP, Midstream
Schedule of Investments [Line Items]
Principal amount				9,761	[1],[3],[5]			19,761	[7],[9],[16]
Investment, Identifier [Axis]: Tenrgys, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount				$ 20,537	[1],[2],[3],[5]			$ 20,537	[7],[8],[9],[16]
Floor rate				1%	[2],[3],[5],[12]	1%	[2],[3],[5],[12]	1%	[8],[9],[13],[16]	1%	[8],[9],[13],[16]
Variable rate				7.50%	[2],[3],[5],[12]	7.50%	[2],[3],[5],[12]	7.50%	[8],[9],[16]	7.50%	[8],[9],[16]
Investment, Identifier [Axis]: Traverse Midstream Partners LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	[7],[9]							$ 28,436
Floor rate	[9],[13]							1%		1%
Variable rate	[9]							4.25%		4.25%
Investment, Identifier [Axis]: Warren Resources, Inc., Upstream
Schedule of Investments [Line Items]
Principal amount				$ 23,644	[1],[2],[3],[5],[17]			$ 23,584	[7],[8],[9],[18]
Floor rate				1%	[2],[3],[5],[12],[17]	1%	[2],[3],[5],[12],[17]	1%	[8],[9],[13],[18]	1%	[8],[9],[13],[18]
Variable rate				9%	[2],[3],[5],[12],[17]	9%	[2],[3],[5],[12],[17]	9%	[8],[9],[18]	9%	[8],[9],[18]
Investment, Identifier [Axis]: Wattbridge Inc., Power
Schedule of Investments [Line Items]
Principal amount				$ 42,252	[1],[2],[3],[5]			$ 42,500	[7],[8],[9]
Floor rate				1.80%	[2],[3],[5],[12]	1.80%	[2],[3],[5],[12]	1.80%	[8],[9],[13]	1.80%	[8],[9],[13]
Variable rate				7.85%	[2],[3],[5],[12]	7.85%	[2],[3],[5],[12]	7.85%	[8],[9]	7.85%	[8],[9]
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Aggregate sustainable infrastructure investments		$ 67,629	$ 5,430
Contributed capital to committed capital ratio		87.50%	87.50%
Percentage of voting control		50%	50%
Amount funded to joint venture				$ 62,300
Principal amount				272,680				$ 274,088
Debt				208,021				213,583
Sustainable Infrastructure Investments, LLC \| Imperial
Schedule of Investments [Line Items]
Contributed capital to committed capital ratio		12.50%	12.50%
Percentage of voting control		50%	50%
Sustainable Infrastructure Investments, LLC \| FS Energy And Power Fund
Schedule of Investments [Line Items]
Sustainable infrastructure investments, LLC entitled to a fee percentage		0.25%	0.25%
Amount funded to joint venture				54,514
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Alianca Transportadora de Gas Participacoes S.A., Midstream
Schedule of Investments [Line Items]
Principal amount				$ 73,707				$ 73,707
Variable rate				2.60%		2.60%		2.60%		2.60%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Blue Heron Intermediate Holdco I, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 31,538				$ 31,832
Variable rate				1.88%		1.88%		1.88%		1.88%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Cedar Creek II LLC, Renewables
Schedule of Investments [Line Items]
Principal amount				$ 8,711				$ 8,710
Variable rate				1.88%		1.88%		1.88%		1.88%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Copper Mountain Solar 3, LLC, Renewables
Schedule of Investments [Line Items]
Principal amount				$ 17,804				$ 17,804
Variable rate				1.75%		1.75%		1.75%		1.75%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: FLNG Liquefaction 2, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 27,780				$ 28,170
Variable rate				1.50%		1.50%		1.50%		1.50%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Largest Portfolio Company Investment
Schedule of Investments [Line Items]
Principal amount				$ 73,707				$ 73,707
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Meikle Wind Energy, LP, Renewables
Schedule of Investments [Line Items]
Principal amount						$ 15,637				$ 16,030
Variable rate				1.50%		1.50%		1.50%		1.50%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: NES Hercules Class B Member, LLC, Renewables
Schedule of Investments [Line Items]
Principal amount				$ 24,317				$ 24,487
Variable rate				1.65%		1.65%		1.50%		1.50%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: ST EIP Holdco LLC, Midstream
Schedule of Investments [Line Items]
Principal amount				$ 58,421				$ 58,673
Variable rate				2.50%		2.50%		2.50%		2.50%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Seine Funding, LLC
Schedule of Investments [Line Items]
Principal amount		$ 634,103
Floor rate		0%
Variable rate		1.20%
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Top of the World Wind Energy LLC, Renewables
Schedule of Investments [Line Items]
Principal amount				$ 18,373				$ 18,373
Variable rate				1.88%		1.88%		1.88%		1.88%
Senior Secured Loan
Schedule of Investments [Line Items]
Number of senior secured loan investments \| investment				5		5		6		6
Unfunded commitment with amortized cost				$ 23,937				$ 25,891
Partnership Interest \| Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Unfunded commitment with amortized cost				$ 7,625		$ 858		$ 7,625		$ 858
Non-controlled/affiliated
Schedule of Investments [Line Items]
Number of investments in portfolio companies \| company				5		5		6		6
Controlled/affiliated
Schedule of Investments [Line Items]
Number of investments in portfolio companies \| company				3		3		3		3

[1]Denominated in U.S. dollars, unless otherwise noted.[2]Security is classified as Level 3 in the Company’s fair value hierarchy (see Note 8).[3]Security may be an obligation of one or more entities affiliated with the named company.[4]Security or portion thereof held within FS Power Investments II, LLC, a wholly-owned subsidiary of the Company.[5]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[6]The investment is not a qualifying asset under the Investment Company Act of 1940, as amended, or the 1940 Act. A business development company may not acquire any asset other than a qualifying asset, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the business development company’s total assets. As of March 31, 2023 , 76.7% of the Company’s total assets represented qualifying assets. March 31, 2023 , the three-month London Interbank Offered Rate, or LIBOR, or L, was 5.19% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.91%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. L, was 4.77% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.59%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 8,436 $ 113 $ (996) $ — $ — $ 7,553 $ 52 $ 113 Allied Wireline Services, LLC 63,888 — — — — 63,888 1,597 — Warren Resources, Inc. 23,584 60 — — — 23,644 810 59 Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 51,098 — — — 1,839 52,937 — — Equity/Other Allied Wireline Services, LLC, Common Equity 10,463 — — — 1,922 12,385 — — Allied Wireline Services, LLC, Warrants — — — — — — — — Warren Resources, Inc., Common Equity 36,982 — — — (7,154) 29,828 — — $ 194,451 $ 173 $ (996) $ — $ (3,393) $ 190,235 $ 2,459 $ 172 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Under the 1940 Act, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” of and deemed to “control.” The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Dividend Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 7,782 $ 654 $ — $ — $ — $ 8,436 $ — $ 654 $ — Allied Wireline Services, LLC 46,339 5,808 — — 11,741 63,888 316 5,808 — MECO IV Holdco, LLC 22,745 455 (23,200) — — — — 455 — Warren Resources, Inc. 23,688 237 (341) — — 23,584 2,620 237 — Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 50,770 — — — 328 51,098 — — 735 Equity/Other Allied Wireline Services, LLC, Common Equity — — — — 10,463 10,463 — — — Allied Wireline Services, LLC, Warrants — — — — — — — — — MECO IV Holdco, LLC, Class A-1 Units 4,181 — (18,060) 15,899 (2,020) — — — — Warren Resources, Inc., Common Equity 25,854 — — — 11,128 36,982 — — — $ 181,359 $ 7,154 $ (41,601) $ 15,899 $ 31,640 $ 194,451 $ 2,936 $ 7,154 $ 735 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK and dividend income presented for the year ended December 31, 2022. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. December 31, 2022 . Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of March 31, 2023, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of March 31, 2023: Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Permian Production Holdings, LLC $ 4,767 $ 56 $ — $ — $ (32) $ 4,791 $ 157 $ 24 Equity/Other GWP Midstream Holdco, LLC, Common Equity 5,044 — — — (1,437) 3,607 — — Harvest Oil & Gas Corp., Common Equity 810 — (506) — 506 810 — — Limetree Bay Energy, LLC, Class A Units 1,885 83 — — (1,029) 939 — — Permian Production Holdings, LLC, Common Equity 11,420 — — — (5,317) 6,103 — — Ridgeback Resources Inc., Common Equity 41,851 — (35,240) (11,359) 4,748 — — — Telpico, LLC, Common Equity — — — — — — — — $ 65,777 $ 139 $ (35,746) $ (11,359) $ (2,561) $ 16,250 $ 157 $ 24 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Fee Income (3) Dividend Income (3) Senior Secured Loans—First Lien Limetree Bay Energy, LLC $ 3,166 $ — $ (1,587) $ (12,756) $ 11,177 $ — $ — $ — $ — $ — Permian Production Holdings, LLC 7,889 697 (3,674) 551 (696) 4,767 570 105 — — Senior Secured Bonds Great Western Petroleum, LLC 58,055 96 (55,096) 1,087 (4,142) — 2,649 — 7,268 — Equity/Other Great Western Petroleum, LLC, Common Equity 40,731 — (84,871) 54,081 (9,941) — — — — — GWP Midstream Holdco, LLC, Common Equity — 6,681 — — (1,637) 5,044 — — — — Harvest Oil & Gas Corp., Common Equity 2,836 — (743) — (1,283) 810 — — — — Limetree Bay Energy, LLC, Class A Units 6,046 1,795 — — (5,956) 1,885 — — — — Permian Production Holdings, LLC, Common Equity 8,829 4 — — 2,587 11,420 — — — 1,726 Ridgeback Resources Inc., Common Equity 48,356 — (12,559) 173 5,881 41,851 — — — 3,691 Telpico, LLC, Common Equity — — — — — — — — — — $ 175,908 $ 9,273 $ (158,530) $ 43,136 $ (4,010) $ 65,777 $ 3,219 $ 105 $ 7,268 $ 5,417 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK, fee and dividend income presented for the year ended December 31, 2022.

Investment Portfolio - Investme

Investment Portfolio - Investment Portfolio, at Fair Value and Percentage (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023		Dec. 31, 2022
Schedule of Investments [Line Items]
Investments, at fair value	$ 1,742,661	[1],[2],[3]	$ 2,047,115	[4],[5]
Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	100%		100%
Upstream
Schedule of Investments [Line Items]
Investments, at fair value	$ 652,180		$ 854,974
Upstream \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	37%		42%
Midstream
Schedule of Investments [Line Items]
Investments, at fair value	$ 582,167		$ 646,488
Midstream \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	33%		32%
Power
Schedule of Investments [Line Items]
Investments, at fair value	$ 348,009		$ 386,007
Power \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	20%		19%
Service & Equipment
Schedule of Investments [Line Items]
Investments, at fair value	$ 97,727		$ 99,171
Service & Equipment \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	6%		5%
Industrials
Schedule of Investments [Line Items]
Investments, at fair value	$ 9,641		$ 9,377
Industrials \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	1%		0%
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Investments, at fair value	$ 52,937		$ 51,098
Sustainable Infrastructure Investments, LLC \| Percentage of Portfolio \| Industry Concentration Risk
Schedule of Investments [Line Items]
Percentage of Portfolio	3%		2%

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[4]Security may be an obligation of one or more entities affiliated with the named company.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.

Investment Portfolio - Individu

Investment Portfolio - Individual Loans in SIIJV’s portfolio (Details) $ in Thousands, $ in Thousands	Mar. 31, 2023 USD ($) portfolio_asset		Mar. 31, 2023 CAD ($) portfolio_asset		Dec. 31, 2022 USD ($) portfolio_asset		Dec. 31, 2022 CAD ($) portfolio_asset		Jan. 02, 2020 USD ($)
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 1
Schedule of Investments [Line Items]
Principal amount	$ 22,902	[1],[2],[3],[4],[5],[6]			$ 22,734	[7],[8],[9],[10],[11]
Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 2
Schedule of Investments [Line Items]
Principal amount	5,359	[1],[2],[3],[4],[5],[6],[12]			5,359	[7],[8],[9],[10],[11],[13]
Investment, Identifier [Axis]: Aethon III BR LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	20,000	[1],[2],[3],[5]			20,000	[7],[8],[9],[14]
Investment, Identifier [Axis]: Aethon United BR LP, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 40,500	[1],[3],[5]			$ 40,500	[7],[9],[14]
Weighted average current interest rate on debt investments	8.30%	[3],[5],[15]	8.30%	[3],[5],[15]	8.30%	[9],[14]	8.30%	[9],[14]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 1
Schedule of Investments [Line Items]
Principal amount	$ 7,553	[1],[2],[3],[5],[16]			$ 8,436	[7],[8],[9],[14],[17]
Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 2
Schedule of Investments [Line Items]
Principal amount	2,500	[1],[2],[3],[5],[12],[16]			2,500	[7],[8],[9],[13],[17]
Investment, Identifier [Axis]: Allied Wireline Services, LLC, Service & Equipment
Schedule of Investments [Line Items]
Principal amount	63,888	[1],[2],[3],[5],[16]			63,888	[7],[8],[9],[14],[17]
Investment, Identifier [Axis]: Archrock Partners, L.P., Midstream
Schedule of Investments [Line Items]
Principal amount					$ 3,098	[7],[9],[11],[14]
Weighted average current interest rate on debt investments					6.30%	[9],[11],[14]	6.30%	[9],[11],[14]
Investment, Identifier [Axis]: Brazos Delaware II LLC, Midstream
Schedule of Investments [Line Items]
Principal amount					$ 39,259	[7],[9]
Investment, Identifier [Axis]: CPV Maryland, LLC, Power
Schedule of Investments [Line Items]
Principal amount					14,286	[7],[9]
Investment, Identifier [Axis]: CPV Shore Holdings LLC, Power
Schedule of Investments [Line Items]
Principal amount	23,601	[1],[3],[5]			23,601	[7],[9]
Investment, Identifier [Axis]: Cimarron Energy Inc., Service & Equipment
Schedule of Investments [Line Items]
Principal amount					7,500	[7],[8],[9],[14],[18],[19]
Investment, Identifier [Axis]: Citizen Energy Operating, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	38,000	[1],[2],[3],[5]			39,000	[7],[8],[9],[14]
Investment, Identifier [Axis]: Compass Power Generation LLC, Power
Schedule of Investments [Line Items]
Principal amount	9,798	[1],[3],[5]			31,575	[7],[9]
Investment, Identifier [Axis]: Cox Oil Offshore, LLC, Volumetric Production Payments, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 100,000	[1],[2],[3],[5],[20],[21]			$ 100,000	[7],[8],[9],[22],[23]
Weighted average current interest rate on debt investments	12.80%	[2],[3],[5],[15],[20],[21]	12.80%	[2],[3],[5],[15],[20],[21]	12.90%	[8],[9],[22],[23]	12.90%	[8],[9],[22],[23]
Investment, Identifier [Axis]: EIF Van Hook Holdings, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	$ 26,882	[1],[3],[5]			$ 26,882	[7],[9]
Investment, Identifier [Axis]: ERA II Minerals, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	36,000	[1],[2],[3],[5]			37,000	[7],[8],[9],[14]
Investment, Identifier [Axis]: Earthstone Energy Holdings, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 11,400	[1],[3],[5],[6]			$ 11,400	[7],[9],[11]
Weighted average current interest rate on debt investments	8%	[3],[5],[6],[15]	8%	[3],[5],[6],[15]	8%	[9],[11]	8%	[9],[11]
Investment, Identifier [Axis]: Endeavor Energy Resources, L.P., Upstream
Schedule of Investments [Line Items]
Principal amount					$ 24,299	[7],[9],[14]
Weighted average current interest rate on debt investments					5.80%	[9],[14]	5.80%	[9],[14]
Investment, Identifier [Axis]: FR BR Holdings LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	$ 81,316	[1],[2],[3],[5]			$ 81,582	[7],[8],[9],[14]
Investment, Identifier [Axis]: FR XIII PAA Holdings HoldCo, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	17,272	[1],[2],[3],[5]			17,347	[7],[8],[9]
Investment, Identifier [Axis]: GIP II Blue Holding LP, Midstream
Schedule of Investments [Line Items]
Principal amount	5,812	[1],[3],[5]			5,918	[7],[9]
Investment, Identifier [Axis]: GasLog Ltd., Midstream
Schedule of Investments [Line Items]
Principal amount	$ 14,648	[1],[2],[3],[5],[6]			14,648	[7],[8],[9],[11]
Weighted average current interest rate on debt investments	7.80%	[2],[3],[5],[6],[15]	7.80%	[2],[3],[5],[6],[15]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 1
Schedule of Investments [Line Items]
Principal amount	$ 7,092	[1],[3],[5]			7,432	[7],[9]
Investment, Identifier [Axis]: Generation Bridge LLC, Power 2
Schedule of Investments [Line Items]
Principal amount	163	[1],[3],[5]			163	[7],[9]
Investment, Identifier [Axis]: Goodnight Water Solutions, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	14,925	[1],[2],[3],[5]			14,963	[7],[8],[9]
Investment, Identifier [Axis]: Hamilton Intermediate Holdings, LLC, Power
Schedule of Investments [Line Items]
Principal amount	31,655	[1],[2],[3],[5]			30,391	[7],[8],[9]
Investment, Identifier [Axis]: Hammerhead Resources Inc., Upstream
Schedule of Investments [Line Items]
Principal amount	37,225	[1],[2],[3],[5],[6]			35,118	[7],[8],[9],[11],[14]
Investment, Identifier [Axis]: Medallion Midland Acquisition LP, Midstream
Schedule of Investments [Line Items]
Principal amount					7,920	[7],[9]
Investment, Identifier [Axis]: Meritage Midstream Services II, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	25,000	[1],[2],[3],[5]
Investment, Identifier [Axis]: Moss Creek Resources, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 11,693	[1],[3],[5]			$ 11,693	[7],[9],[14]
Weighted average current interest rate on debt investments	7.50%	[3],[5],[15]	7.50%	[3],[5],[15]	7.50%	[9],[14]	7.50%	[9],[14]
Investment, Identifier [Axis]: NGL Energy Partners, LP, Preferred Equity, Midstream
Schedule of Investments [Line Items]
Weighted average current interest rate on debt investments	14.20%	[2],[3],[5],[6],[15],[24],[25]	14.20%	[2],[3],[5],[6],[15],[24],[25]	14.20%	[8],[9],[11],[14],[18],[19]	14.20%	[8],[9],[11],[14],[18],[19]
Investment, Identifier [Axis]: NRG Energy, Inc., Power
Schedule of Investments [Line Items]
Principal amount	$ 16,125	[1],[3],[5],[6]			$ 19,125	[7],[9],[11]
Weighted average current interest rate on debt investments	3.90%	[3],[5],[6],[15]	3.90%	[3],[5],[6],[15]	3.90%	[9],[11]	3.90%	[9],[11]
Investment, Identifier [Axis]: NuStar, Preferred Equity, Midstream
Schedule of Investments [Line Items]
Weighted average current interest rate on debt investments	12.80%	[2],[3],[5],[6],[15]	12.80%	[2],[3],[5],[6],[15]	12.80%	[8],[9],[11],[14]	12.80%	[8],[9],[11],[14]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 1
Schedule of Investments [Line Items]
Principal amount	$ 19,108	[1],[2],[3],[5]			$ 18,659	[7],[8],[9]
Investment, Identifier [Axis]: OE2 North, LLC, Midstream 2
Schedule of Investments [Line Items]
Principal amount	10,892	[1],[2],[3],[5],[12]			11,341	[7],[8],[9],[13]
Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	26,289	[1],[3],[5]			32,357	[7],[9],[14]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 1
Schedule of Investments [Line Items]
Principal amount	5,760	[1],[3],[5]			5,760	[7],[9]
Investment, Identifier [Axis]: Parkway Generation LLC, Power 2
Schedule of Investments [Line Items]
Principal amount	43,800	[1],[3],[5]			43,910	[7],[9]
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 1
Schedule of Investments [Line Items]
Principal amount					13,545	[7],[8],[9],[14]
Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 2
Schedule of Investments [Line Items]
Principal amount					1,505	[7],[8],[9],[13]
Investment, Identifier [Axis]: Permian Production Holdings, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 4,791	[1],[2],[3],[5],[26]			$ 4,767	[7],[8],[9],[14],[27]
Weighted average current interest rate on debt investments	7%	[2],[3],[5],[15],[26]	7%	[2],[3],[5],[15],[26]	7%	[8],[9],[14],[27]	7%	[8],[9],[14],[27]
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 1
Schedule of Investments [Line Items]
Principal amount					$ 26,365	[7],[9]
Weighted average current interest rate on debt investments					7.80%	[9]	7.80%	[9]
Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 2
Schedule of Investments [Line Items]
Principal amount					$ 5,200	[7],[9],[14]
Weighted average current interest rate on debt investments					5.90%	[9],[14]	5.90%	[9],[14]
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 1
Schedule of Investments [Line Items]
Principal amount	$ 9,370	[1],[2],[3],[5]			$ 9,370	[7],[8],[9]
Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 2
Schedule of Investments [Line Items]
Principal amount	2,477	[1],[2],[3],[5],[12]			2,477	[7],[8],[9],[13]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Letter of Credit, Power
Schedule of Investments [Line Items]
Principal amount	$ 2,709	[1],[2],[3],[5],[12]			$ 2,709	[7],[8],[9],[13]
Weighted average current interest rate on debt investments	10%	[2],[3],[5],[12],[15]	10%	[2],[3],[5],[12],[15]	10%	[8],[9],[13]	10%	[8],[9],[13]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 1
Schedule of Investments [Line Items]
Principal amount	$ 12,704	[1],[2],[3],[5]			$ 12,121	[7],[8],[9],[14]
Weighted average current interest rate on debt investments	6%	[2],[3],[5],[15]	6%	[2],[3],[5],[15]	6%	[8],[9],[14]	6%	[8],[9],[14]
Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 2
Schedule of Investments [Line Items]
Principal amount	$ 3,827	[1],[2],[3],[5],[25]			$ 3,643	[7],[8],[9],[14]
Investment, Identifier [Axis]: Potomac Energy Center, LLC, Power
Schedule of Investments [Line Items]
Principal amount	58,164	[1],[2],[3],[5]			58,459	[7],[8],[9]
Investment, Identifier [Axis]: Ranger Oil Corp., Upstream
Schedule of Investments [Line Items]
Principal amount					$ 29,772	[7],[9],[11]
Weighted average current interest rate on debt investments					9.30%	[9],[11]	9.30%	[9],[11]
Investment, Identifier [Axis]: ST EIP Holdings Inc., Midstream
Schedule of Investments [Line Items]
Principal amount	$ 10,526	[1],[2],[3],[5]			$ 10,526	[7],[8],[9]
Weighted average current interest rate on debt investments	6.30%	[2],[3],[5],[15]	6.30%	[2],[3],[5],[15]	6.30%	[8],[9]	6.30%	[8],[9]
Investment, Identifier [Axis]: Segreto Power Holdings, LLC, Preferred Equity, Power
Schedule of Investments [Line Items]
Weighted average current interest rate on debt investments	13.10%	[2],[3],[5],[15],[24],[25],[28]	13.10%	[2],[3],[5],[15],[24],[25],[28]	13.10%	[8],[9],[14],[18],[19],[29]	13.10%	[8],[9],[14],[18],[19],[29]
Investment, Identifier [Axis]: SilverBow Resources, Inc., Upstream
Schedule of Investments [Line Items]
Principal amount	$ 14,250	[1],[2],[3],[5],[6]			$ 14,250	[7],[8],[9],[11],[14]
Investment, Identifier [Axis]: Sitio Royalties Operating Partnership, LP, Upstream
Schedule of Investments [Line Items]
Principal amount	19,000	[1],[2],[3],[5],[6]			19,500	[7],[8],[9],[11],[14]
Investment, Identifier [Axis]: Suburban Propane Partners LP, Midstream
Schedule of Investments [Line Items]
Principal amount					$ 7,590	[7],[9],[11],[14]
Weighted average current interest rate on debt investments					5%	[9],[11],[14]	5%	[9],[11],[14]
Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC, Power
Schedule of Investments [Line Items]
Principal amount	60,603	[1],[2],[3],[5],[6],[16],[24]			$ 60,603	[8],[9],[17],[30]
Investment, Identifier [Axis]: Tallgrass Energy Partners, LP, Midstream
Schedule of Investments [Line Items]
Principal amount	$ 9,761	[1],[3],[5]			$ 19,761	[7],[9],[14]
Weighted average current interest rate on debt investments	6%	[3],[5],[15]	6%	[3],[5],[15]	6%	[9],[14]	6%	[9],[14]
Investment, Identifier [Axis]: Tenrgys, LLC, Upstream
Schedule of Investments [Line Items]
Principal amount	$ 20,537	[1],[2],[3],[5]			$ 20,537	[7],[8],[9],[14]
Investment, Identifier [Axis]: Traverse Midstream Partners LLC, Midstream
Schedule of Investments [Line Items]
Principal amount					$ 28,436	[7],[9]
Investment, Identifier [Axis]: USA Compression Partners, LP, Preferred Equity, Midstream
Schedule of Investments [Line Items]
Weighted average current interest rate on debt investments	9.80%	[2],[3],[5],[6],[15]	9.80%	[2],[3],[5],[6],[15]	9.80%	[8],[9]	9.80%	[8],[9]
Investment, Identifier [Axis]: Warren Resources, Inc., Upstream
Schedule of Investments [Line Items]
Principal amount	$ 23,644	[1],[2],[3],[5],[16]			$ 23,584	[7],[8],[9],[17]
Investment, Identifier [Axis]: Wattbridge Inc., Power
Schedule of Investments [Line Items]
Principal amount	42,252	[1],[2],[3],[5]			42,500	[7],[8],[9]
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Principal amount	$ 272,680				$ 274,088
Number of portfolio assets in SIIJV \| portfolio_asset	9		9		9		9
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Alianca Transportadora de Gas Participacoes S.A., Midstream
Schedule of Investments [Line Items]
Principal amount	$ 73,707				$ 73,707
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Blue Heron Intermediate Holdco I, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	31,538				31,832
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Cedar Creek II LLC, Renewables
Schedule of Investments [Line Items]
Principal amount	8,711				8,710
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Copper Mountain Solar 3, LLC, Renewables
Schedule of Investments [Line Items]
Principal amount	17,804				17,804
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: FLNG Liquefaction 2, LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	27,780				28,170
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Largest Portfolio Company Investment
Schedule of Investments [Line Items]
Principal amount	73,707				73,707
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Meikle Wind Energy, LP, Renewables
Schedule of Investments [Line Items]
Principal amount			$ 15,637				$ 16,030
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: NES Hercules Class B Member, LLC, Renewables
Schedule of Investments [Line Items]
Principal amount	24,317				24,487
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: ST EIP Holdco LLC, Midstream
Schedule of Investments [Line Items]
Principal amount	58,421				58,673
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Seine Funding, LLC
Schedule of Investments [Line Items]
Principal amount									$ 634,103
Sustainable Infrastructure Investments, LLC \| Investment, Identifier [Axis]: Top of the World Wind Energy LLC, Renewables
Schedule of Investments [Line Items]
Principal amount	$ 18,373				$ 18,373
Sustainable Infrastructure Investments, LLC \| Weighted Average
Schedule of Investments [Line Items]
Weighted average current interest rate on debt investments	7.26%		7.26%		6.96%		6.96%

[1]Denominated in U.S. dollars, unless otherwise noted.[2]Security is classified as Level 3 in the Company’s fair value hierarchy (see Note 8).[3]Security may be an obligation of one or more entities affiliated with the named company.[4]Security or portion thereof held within FS Power Investments II, LLC, a wholly-owned subsidiary of the Company.[5]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[6]The investment is not a qualifying asset under the Investment Company Act of 1940, as amended, or the 1940 Act. A business development company may not acquire any asset other than a qualifying asset, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the business development company’s total assets. As of March 31, 2023 , 76.7% of the Company’s total assets represented qualifying assets. March 31, 2023 , the three-month London Interbank Offered Rate, or LIBOR, or L, was 5.19% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.91%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 8,436 $ 113 $ (996) $ — $ — $ 7,553 $ 52 $ 113 Allied Wireline Services, LLC 63,888 — — — — 63,888 1,597 — Warren Resources, Inc. 23,584 60 — — — 23,644 810 59 Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 51,098 — — — 1,839 52,937 — — Equity/Other Allied Wireline Services, LLC, Common Equity 10,463 — — — 1,922 12,385 — — Allied Wireline Services, LLC, Warrants — — — — — — — — Warren Resources, Inc., Common Equity 36,982 — — — (7,154) 29,828 — — $ 194,451 $ 173 $ (996) $ — $ (3,393) $ 190,235 $ 2,459 $ 172 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Under the 1940 Act, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” of and deemed to “control.” The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Dividend Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 7,782 $ 654 $ — $ — $ — $ 8,436 $ — $ 654 $ — Allied Wireline Services, LLC 46,339 5,808 — — 11,741 63,888 316 5,808 — MECO IV Holdco, LLC 22,745 455 (23,200) — — — — 455 — Warren Resources, Inc. 23,688 237 (341) — — 23,584 2,620 237 — Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 50,770 — — — 328 51,098 — — 735 Equity/Other Allied Wireline Services, LLC, Common Equity — — — — 10,463 10,463 — — — Allied Wireline Services, LLC, Warrants — — — — — — — — — MECO IV Holdco, LLC, Class A-1 Units 4,181 — (18,060) 15,899 (2,020) — — — — Warren Resources, Inc., Common Equity 25,854 — — — 11,128 36,982 — — — $ 181,359 $ 7,154 $ (41,601) $ 15,899 $ 31,640 $ 194,451 $ 2,936 $ 7,154 $ 735 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK and dividend income presented for the year ended December 31, 2022. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. December 31, 2022 . Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of March 31, 2023, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of March 31, 2023: Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Permian Production Holdings, LLC $ 4,767 $ 56 $ — $ — $ (32) $ 4,791 $ 157 $ 24 Equity/Other GWP Midstream Holdco, LLC, Common Equity 5,044 — — — (1,437) 3,607 — — Harvest Oil & Gas Corp., Common Equity 810 — (506) — 506 810 — — Limetree Bay Energy, LLC, Class A Units 1,885 83 — — (1,029) 939 — — Permian Production Holdings, LLC, Common Equity 11,420 — — — (5,317) 6,103 — — Ridgeback Resources Inc., Common Equity 41,851 — (35,240) (11,359) 4,748 — — — Telpico, LLC, Common Equity — — — — — — — — $ 65,777 $ 139 $ (35,746) $ (11,359) $ (2,561) $ 16,250 $ 157 $ 24 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Fee Income (3) Dividend Income (3) Senior Secured Loans—First Lien Limetree Bay Energy, LLC $ 3,166 $ — $ (1,587) $ (12,756) $ 11,177 $ — $ — $ — $ — $ — Permian Production Holdings, LLC 7,889 697 (3,674) 551 (696) 4,767 570 105 — — Senior Secured Bonds Great Western Petroleum, LLC 58,055 96 (55,096) 1,087 (4,142) — 2,649 — 7,268 — Equity/Other Great Western Petroleum, LLC, Common Equity 40,731 — (84,871) 54,081 (9,941) — — — — — GWP Midstream Holdco, LLC, Common Equity — 6,681 — — (1,637) 5,044 — — — — Harvest Oil & Gas Corp., Common Equity 2,836 — (743) — (1,283) 810 — — — — Limetree Bay Energy, LLC, Class A Units 6,046 1,795 — — (5,956) 1,885 — — — — Permian Production Holdings, LLC, Common Equity 8,829 4 — — 2,587 11,420 — — — 1,726 Ridgeback Resources Inc., Common Equity 48,356 — (12,559) 173 5,881 41,851 — — — 3,691 Telpico, LLC, Common Equity — — — — — — — — — — $ 175,908 $ 9,273 $ (158,530) $ 43,136 $ (4,010) $ 65,777 $ 3,219 $ 105 $ 7,268 $ 5,417 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK, fee and dividend income presented for the year ended December 31, 2022.

Investment Portfolio - Sustaina

Investment Portfolio - Sustainable Infrastructure Investments, LLC Portfolio (Details) $ in Thousands, $ in Thousands

Mar. 31, 2023 USD ($)

Mar. 31, 2023 CAD ($)

Dec. 31, 2022 USD ($)

Dec. 31, 2022 CAD ($)

Dec. 31, 2021 USD ($)

Jan. 02, 2020 USD ($)

Schedule of Investments [Line Items]

Amortized Cost

$ 1,648,959

[1],[2]

$ 1,922,940

[3]

Investments, at fair value

$ 1,742,661

[1],[2],[4]

$ 2,047,115

[3],[5]

Percent of net assets

101.70%

[1],[2]

101.70%

[1],[2]

116.70%

[3]

116.70%

[3]

London Interbank Offered Rate (LIBOR)

Schedule of Investments [Line Items]

Investment, variable rate

5.19%

4.77%

Secured Overnight Financing Rate

Schedule of Investments [Line Items]

Investment, variable rate

4.91%

4.59%

Net Senior Secured Loans—First Lien

Schedule of Investments [Line Items]

Amortized Cost

$ 603,363

[1],[2]

$ 702,842

[3]

Investments, at fair value

$ 599,454

[1],[2],[4]

$ 706,646

[3],[5]

Percent of net assets

35%

[1],[2]

35%

[1],[2]

40.30%

[3]

40.30%

[3]

Unsecured Debt

Schedule of Investments [Line Items]

Amortized Cost

$ 143,504

$ 253,675

Investments, at fair value

$ 139,919

$ 241,418

Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 1

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6],[7],[8],[9]

[3],[10],[11],[12]

Principal Amount

$ 22,902

[1],[2],[7],[8],[9],[13]

$ 22,734

[3],[10],[11],[12],[14]

Amortized Cost

20,250

[1],[2],[7],[8],[9]

20,082

[3],[10],[11],[12]

Investments, at fair value

$ 23,682

[1],[2],[4],[7],[8],[9]

$ 23,519

[3],[5],[10],[11],[12]

Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Power 2

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6],[7],[8],[9],[15]

[3],[10],[11],[12],[16]

Principal Amount

$ 5,359

[1],[2],[7],[8],[9],[13],[15]

$ 5,359

[3],[10],[11],[12],[14],[16]

Amortized Cost

5,359

[1],[2],[7],[8],[9],[15]

5,359

[3],[10],[11],[12],[16]

Investments, at fair value

5,542

[1],[2],[4],[7],[8],[9],[15]

5,545

[3],[5],[10],[11],[12],[16]

Investment, Identifier [Axis]: AIRRO (Mauritius) Holdings II, Warrants, Strike: $1.00, Power

Schedule of Investments [Line Items]

Amortized Cost

2,652

[1],[2],[7],[8],[9],[17]

2,652

[3],[10],[11],[12],[18],[19]

Investments, at fair value

1,381

[1],[2],[4],[7],[8],[9],[17]

1,630

[3],[5],[10],[11],[12],[18],[19]

Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

6,944

[1],[2],[7],[17]

6,944

[3],[10],[18],[19]

Investments, at fair value

1,313

[1],[2],[4],[7],[17]

1,219

[3],[5],[10],[18],[19]

Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

1,447

[1],[2],[7],[17]

1,447

[3],[10],[18],[19]

Investments, at fair value

$ 9,175

[1],[2],[4],[7],[17]

$ 8,321

[3],[5],[10],[18],[19]

Investment, Identifier [Axis]: Aethon III BR LLC, Upstream

Schedule of Investments [Line Items]

Variable rate

7.50%

[1],[2],[6],[7]

7.50%

[1],[2],[6],[7]

7.50%

[3],[10],[19]

7.50%

[3],[10],[19]

Principal Amount

$ 20,000

[1],[2],[7],[13]

$ 20,000

[3],[10],[14],[19]

Amortized Cost

19,862

[1],[2],[7]

19,848

[3],[10],[19]

Investments, at fair value

20,111

[1],[2],[4],[7]

20,138

[3],[5],[10],[19]

Investment, Identifier [Axis]: Aethon United BR LP, Upstream

Schedule of Investments [Line Items]

Principal Amount

40,500

[1],[2],[13]

40,500

[3],[14],[19]

Amortized Cost

40,500

[1],[2]

40,500

[3],[19]

Investments, at fair value

39,780

[1],[2],[4]

40,221

[3],[5],[19]

Investment, Identifier [Axis]: AirSwift Holdings, Ltd., Common Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

[1],[2],[7],[9],[17]

6,029

Investments, at fair value

[1],[2],[4],[7],[9],[17]

3,413

Investment, Identifier [Axis]: Allied Downhole Technologies, LLC

Schedule of Investments [Line Items]

Investments, at fair value

7,553

[20]

8,436

[20],[21]

$ 7,782

[21]

Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 1

Schedule of Investments [Line Items]

Principal Amount

7,553

[1],[2],[7],[13],[22]

8,436

[3],[10],[14],[19],[23]

Amortized Cost

7,553

[1],[2],[7],[22]

8,436

[3],[10],[19],[23]

Investments, at fair value

7,553

[1],[2],[4],[7],[22]

8,436

[3],[5],[10],[19],[23]

Investment, Identifier [Axis]: Allied Downhole Technologies, LLC, Service & Equipment 2

Schedule of Investments [Line Items]

Principal Amount

2,500

[1],[2],[7],[13],[15],[22]

2,500

[3],[10],[14],[16],[23]

Amortized Cost

2,500

[1],[2],[7],[15],[22]

2,500

[3],[10],[16],[23]

Investments, at fair value

2,500

[1],[2],[4],[7],[15],[22]

2,500

[3],[5],[10],[16],[23]

Investment, Identifier [Axis]: Allied Wireline Services, LLC

Schedule of Investments [Line Items]

Investments, at fair value

63,888

46,339

Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

12,385

10,463

Investment, Identifier [Axis]: Allied Wireline Services, LLC, Common Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

1,527

[1],[2],[7],[17],[22],[24]

1,527

[3],[10],[18],[19],[23],[25]

Investments, at fair value

12,385

[1],[2],[4],[7],[17],[22],[24]

10,463

[3],[5],[10],[18],[19],[23],[25]

Investment, Identifier [Axis]: Allied Wireline Services, LLC, Service & Equipment

Schedule of Investments [Line Items]

Principal Amount

63,888

[1],[2],[7],[13],[22]

63,888

[3],[10],[14],[19],[23]

Amortized Cost

63,888

[1],[2],[7],[22]

63,888

[3],[10],[19],[23]

Investments, at fair value

63,888

[1],[2],[4],[7],[22]

63,888

[3],[5],[10],[19],[23]

Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants

Schedule of Investments [Line Items]

Investments, at fair value

Investment, Identifier [Axis]: Allied Wireline Services, LLC, Warrants, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

[1],[2],[7],[17],[22],[24]

[3],[10],[18],[19],[23],[25]

Investments, at fair value

[1],[2],[4],[7],[17],[22],[24]

[3],[5],[10],[18],[19],[23],[25]

Investment, Identifier [Axis]: Archrock Partners, L.P., Midstream

Schedule of Investments [Line Items]

Principal Amount

[3],[12],[14],[19]

3,098

Amortized Cost

[3],[12],[19]

3,168

Investments, at fair value

[3],[5],[12],[19]

2,840

Investment, Identifier [Axis]: Arena Energy, LP, Contingent Value Rights, Upstream

Schedule of Investments [Line Items]

Amortized Cost

351

[1],[2],[7]

351

[3],[10],[18],[19]

Investments, at fair value

514

[1],[2],[4],[7]

858

[3],[5],[10],[18],[19]

Investment, Identifier [Axis]: Ascent Resources Utica Holdings, LLC, Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

44,700

[1],[2],[7],[17],[24]

44,700

[3],[10],[18],[19],[25]

Investments, at fair value

$ 40,221

[1],[2],[4],[7],[17],[24]

$ 52,340

[3],[5],[10],[18],[19],[25]

Investment, Identifier [Axis]: Brazos Delaware II LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

[3]

Principal Amount

[3],[14]

$ 39,259

Amortized Cost

[3]

38,085

Investments, at fair value

[3],[5]

$ 39,137

Investment, Identifier [Axis]: CPV Maryland, LLC, Power

Schedule of Investments [Line Items]

Variable rate

[3]

Principal Amount

[3],[14]

$ 14,286

Amortized Cost

[3]

14,146

Investments, at fair value

[3],[5]

$ 14,155

Investment, Identifier [Axis]: CPV Shore Holdings LLC, Power

Schedule of Investments [Line Items]

Variable rate

3.75%

[1],[2],[6]

3.75%

[1],[2],[6]

3.75%

[3]

3.75%

[3]

Principal Amount

$ 23,601

[1],[2],[13]

$ 23,601

[3],[14]

Amortized Cost

22,819

[1],[2]

22,760

[3]

Investments, at fair value

$ 21,874

[1],[2],[4]

21,935

[3],[5]

Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Common Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

[3],[10],[18],[19]

3,950

Investments, at fair value

[3],[5],[10],[18],[19]

Investment, Identifier [Axis]: Cimarron Energy Holdco Inc., Participation Option, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

[3],[10],[18],[19]

1,289

Investments, at fair value

[3],[5],[10],[18],[19]

$ 0

Investment, Identifier [Axis]: Cimarron Energy Inc., Service & Equipment

Schedule of Investments [Line Items]

Variable rate

[3],[10],[18],[19],[26]

Principal Amount

[3],[10],[14],[18],[19],[26]

$ 7,500

Amortized Cost

[3],[10],[18],[19],[26]

6,563

Investments, at fair value

[3],[5],[10],[18],[19],[26]

$ 3,713

Investment, Identifier [Axis]: Citizen Energy Operating, LLC, Upstream

Schedule of Investments [Line Items]

Variable rate

7.65%

[1],[2],[6],[7]

7.65%

[1],[2],[6],[7]

7.65%

[3],[10],[19]

7.65%

[3],[10],[19]

Principal Amount

$ 38,000

[1],[2],[7],[13]

$ 39,000

[3],[10],[14],[19]

Amortized Cost

37,466

[1],[2],[7]

38,440

[3],[10],[19]

Investments, at fair value

$ 37,380

[1],[2],[4],[7]

$ 38,240

[3],[5],[10],[19]

Investment, Identifier [Axis]: Compass Power Generation LLC, Power

Schedule of Investments [Line Items]

Variable rate

4.25%

[1],[2],[6]

4.25%

[1],[2],[6]

4.25%

[3]

4.25%

[3]

Principal Amount

$ 9,798

[1],[2],[13]

$ 31,575

[3],[14]

Amortized Cost

9,530

[1],[2]

30,712

[3]

Investments, at fair value

9,777

[1],[2],[4]

31,384

[3],[5]

Investment, Identifier [Axis]: Cox Oil Offshore, LLC, Volumetric Production Payments, Upstream

Schedule of Investments [Line Items]

Principal Amount

100,000

[1],[2],[7],[13],[27],[28]

100,000

[3],[10],[14],[29],[30]

Amortized Cost

8,638

[1],[2],[7],[27],[28]

11,081

[3],[10],[29],[30]

Investments, at fair value

$ 12,822

[1],[2],[4],[7],[27],[28]

$ 20,683

[3],[5],[10],[29],[30]

Investment, Identifier [Axis]: EIF Van Hook Holdings, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

5.25%

[1],[2],[6]

5.25%

[1],[2],[6]

5.25%

[3]

5.25%

[3]

Principal Amount

$ 26,882

[1],[2],[13]

$ 26,882

[3],[14]

Amortized Cost

26,644

[1],[2]

26,609

[3]

Investments, at fair value

$ 26,781

[1],[2],[4]

$ 26,075

[3],[5]

Investment, Identifier [Axis]: ERA II Minerals, LLC, Upstream

Schedule of Investments [Line Items]

Variable rate

6.25%

[1],[2],[6],[7]

6.25%

[1],[2],[6],[7]

6.25%

[3],[10],[19]

6.25%

[3],[10],[19]

Principal Amount

$ 36,000

[1],[2],[7],[13]

$ 37,000

[3],[10],[14],[19]

Amortized Cost

35,628

[1],[2],[7]

36,601

[3],[10],[19]

Investments, at fair value

35,564

[1],[2],[4],[7]

36,656

[3],[5],[10],[19]

Investment, Identifier [Axis]: Earthstone Energy Holdings, LLC, Upstream

Schedule of Investments [Line Items]

Principal Amount

11,400

[1],[2],[9],[13]

11,400

[3],[12],[14]

Amortized Cost

11,400

[1],[2],[9]

11,400

[3],[12]

Investments, at fair value

$ 11,073

[1],[2],[4],[9]

10,920

[3],[5],[12]

Investment, Identifier [Axis]: Endeavor Energy Resources, L.P., Upstream

Schedule of Investments [Line Items]

Principal Amount

[3],[14],[19]

24,299

Amortized Cost

[3],[19]

25,388

Investments, at fair value

[3],[5],[19]

$ 23,306

Investment, Identifier [Axis]: FR BR Holdings LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

6.50%

[1],[2],[6],[7]

6.50%

[1],[2],[6],[7]

6.50%

[3],[10],[19]

6.50%

[3],[10],[19]

Principal Amount

$ 81,316

[1],[2],[7],[13]

$ 81,582

[3],[10],[14],[19]

Amortized Cost

80,393

[1],[2],[7]

80,371

[3],[10],[19]

Investments, at fair value

$ 81,242

[1],[2],[4],[7]

$ 81,361

[3],[5],[10],[19]

Investment, Identifier [Axis]: FR XIII PAA Holdings HoldCo, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

7.50%

[1],[2],[6],[7]

7.50%

[1],[2],[6],[7]

7.50%

[3],[10]

7.50%

[3],[10]

Principal Amount

$ 17,272

[1],[2],[7],[13]

$ 17,347

[3],[10],[14]

Amortized Cost

17,040

[1],[2],[7]

17,103

[3],[10]

Investments, at fair value

$ 17,351

[1],[2],[4],[7]

$ 17,406

[3],[5],[10]

Investment, Identifier [Axis]: GIP II Blue Holding LP, Midstream

Schedule of Investments [Line Items]

Variable rate

4.50%

[1],[2],[6]

4.50%

[1],[2],[6]

4.50%

[3]

4.50%

[3]

Principal Amount

$ 5,812

[1],[2],[13]

$ 5,918

[3],[14]

Amortized Cost

5,740

[1],[2]

5,842

[3]

Investments, at fair value

5,792

[1],[2],[4]

5,877

[3],[5]

Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

3,607

5,044

Investment, Identifier [Axis]: GWP Midstream Holdco, LLC, Common Equity, Midstream

Schedule of Investments [Line Items]

Amortized Cost

6,681

[1],[2],[7],[17],[24],[31]

6,681

[3],[10],[18],[19],[25],[32]

Investments, at fair value

3,607

[1],[2],[4],[7],[17],[24],[31]

$ 5,044

[3],[5],[10],[18],[19],[25],[32]

Investment, Identifier [Axis]: GasLog Ltd., Midstream

Schedule of Investments [Line Items]

Variable rate

[3],[10],[12]

7.75%

Principal Amount

14,648

[1],[2],[7],[9],[13]

$ 14,648

[3],[10],[12],[14]

Amortized Cost

14,559

[1],[2],[7],[9]

14,556

[3],[10],[12]

Investments, at fair value

$ 14,125

[1],[2],[4],[7],[9]

$ 14,010

[3],[5],[10],[12]

Investment, Identifier [Axis]: Generation Bridge LLC, Power 1

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6]

[3]

Principal Amount

$ 7,092

[1],[2],[13]

$ 7,432

[3],[14]

Amortized Cost

6,976

[1],[2]

7,305

[3]

Investments, at fair value

$ 7,091

[1],[2],[4]

$ 7,385

[3],[5]

Investment, Identifier [Axis]: Generation Bridge LLC, Power 2

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6]

[3]

Principal Amount

$ 163

[1],[2],[13]

$ 163

[3],[14]

Amortized Cost

160

[1],[2]

160

[3]

Investments, at fair value

163

[1],[2],[4]

162

[3],[5]

Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 1

Schedule of Investments [Line Items]

Amortized Cost

2,786

[1],[2],[7],[17]

2,786

[3],[10],[18],[19]

Investments, at fair value

[1],[2],[4],[7],[17]

[3],[5],[10],[18],[19]

Investment, Identifier [Axis]: Global Jet Capital Holdings, LP, Preferred Equity, Industrials 2

Schedule of Investments [Line Items]

Amortized Cost

12,493

[1],[2],[7],[17],[33]

12,493

[3],[10],[18],[19],[26]

Investments, at fair value

$ 9,641

[1],[2],[4],[7],[17],[33]

$ 9,377

[3],[5],[10],[18],[19],[26]

Investment, Identifier [Axis]: Goodnight Water Solutions, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6],[7]

7.25%

[3],[10]

7.25%

[3],[10]

Principal Amount

$ 14,925

[1],[2],[7],[13]

$ 14,963

[3],[10],[14]

Amortized Cost

14,720

[1],[2],[7]

14,752

[3],[10]

Investments, at fair value

14,788

[1],[2],[4],[7]

14,819

[3],[5],[10]

Investment, Identifier [Axis]: Great Western Petroleum, LLC

Schedule of Investments [Line Items]

Investments, at fair value

58,055

Investment, Identifier [Axis]: Great Western Petroleum, LLC, Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

40,731

Investment, Identifier [Axis]: Hamilton Intermediate Holdings, LLC, Power

Schedule of Investments [Line Items]

Principal Amount

31,655

[1],[2],[7],[13]

30,391

[3],[10],[14]

Amortized Cost

32,281

[1],[2],[7]

31,075

[3],[10]

Investments, at fair value

31,996

[1],[2],[4],[7]

$ 31,007

[3],[5],[10]

Investment, Identifier [Axis]: Hammerhead Resources Inc., Upstream

Schedule of Investments [Line Items]

Variable rate

[3],[10],[12],[19]

12%

Principal Amount

37,225

[1],[2],[7],[9],[13]

$ 35,118

[3],[10],[12],[14],[19]

Amortized Cost

37,085

[1],[2],[7],[9]

34,961

[3],[10],[12],[19]

Investments, at fair value

37,225

[1],[2],[4],[7],[9]

35,118

[3],[5],[10],[12],[19]

Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

810

2,836

Investment, Identifier [Axis]: Harvest Oil & Gas Corp., Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

14,553

[1],[2],[7],[17],[31]

15,059

[3],[18],[19],[32]

Investments, at fair value

810

[1],[2],[4],[7],[17],[31]

810

[3],[5],[18],[19],[32]

Investment, Identifier [Axis]: Limetree Bay Energy, LLC

Schedule of Investments [Line Items]

Investments, at fair value

3,166

Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units

Schedule of Investments [Line Items]

Investments, at fair value

939

1,885

6,046

Investment, Identifier [Axis]: Limetree Bay Energy, LLC, Class A Units, Midstream

Schedule of Investments [Line Items]

Amortized Cost

21,541

[1],[2],[7],[17],[31]

21,458

[3],[10],[18],[19],[32]

Investments, at fair value

939

[1],[2],[4],[7],[17],[31]

1,885

[3],[5],[10],[18],[19],[32]

Investment, Identifier [Axis]: MB Precision Investment Holdings LLC, Class A-2 Units, Industrials

Schedule of Investments [Line Items]

Amortized Cost

[3],[10],[18],[19],[25]

490

Investments, at fair value

[3],[5],[10],[18],[19],[25]

Investment, Identifier [Axis]: MECO IV Holdco, LLC

Schedule of Investments [Line Items]

Investments, at fair value

22,745

Investment, Identifier [Axis]: MECO IV Holdco, LLC, Class A-1 Units

Schedule of Investments [Line Items]

Investments, at fair value

4,181

Investment, Identifier [Axis]: Maverick Natural Resources, LLC, Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

138,208

[1],[2],[7],[24]

138,208

[3],[10],[19],[25]

Investments, at fair value

$ 278,760

[1],[2],[4],[7],[24]

$ 312,372

[3],[5],[10],[19],[25]

Investment, Identifier [Axis]: Medallion Midland Acquisition LP, Midstream

Schedule of Investments [Line Items]

Variable rate

[3]

3.75%

Principal Amount

[3],[14]

$ 7,920

Amortized Cost

[3]

7,886

Investments, at fair value

[3],[5]

7,862

Investment, Identifier [Axis]: Meritage Midstream Services II, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6]

6.75%

Principal Amount

[1],[2],[7],[13]

$ 25,000

Amortized Cost

[1],[2],[7]

24,511

Investments, at fair value

[1],[2],[4],[7]

24,500

Investment, Identifier [Axis]: Moss Creek Resources, LLC, Upstream

Schedule of Investments [Line Items]

Principal Amount

11,693

[1],[2],[13]

11,693

[3],[14],[19]

Amortized Cost

10,446

[1],[2]

10,358

[3],[19]

Investments, at fair value

10,856

[1],[2],[4]

10,561

[3],[5],[19]

Investment, Identifier [Axis]: NGL Energy Partners, LP, Preferred Equity, Midstream

Schedule of Investments [Line Items]

Amortized Cost

157,633

[1],[2],[7],[9],[17],[33]

157,633

[3],[10],[12],[18],[19],[26]

Investments, at fair value

134,138

[1],[2],[4],[7],[9],[17],[33]

125,000

[3],[5],[10],[12],[18],[19],[26]

Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $13.56, Midstream

Schedule of Investments [Line Items]

Amortized Cost

630

[1],[2],[7],[9],[17]

630

[3],[10],[12],[18],[19]

Investments, at fair value

105

[1],[2],[4],[7],[9],[17]

[3],[5],[10],[12],[18],[19]

Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Par), Strike: $14.54, Midstream

Schedule of Investments [Line Items]

Amortized Cost

3,083

[1],[2],[7],[9],[17]

3,083

[3],[10],[12],[18],[19]

Investments, at fair value

441

[1],[2],[4],[7],[9],[17]

[3],[5],[10],[12],[18],[19]

Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $16.27, Midstream

Schedule of Investments [Line Items]

Amortized Cost

576

[1],[2],[7],[9],[17]

576

[3],[10],[12],[18],[19]

Investments, at fair value

113

[1],[2],[4],[7],[9],[17]

[3],[5],[10],[12],[18],[19]

Investment, Identifier [Axis]: NGL Energy Partners, LP, Warrants (Premium), Strike: $17.45, Midstream

Schedule of Investments [Line Items]

Amortized Cost

2,623

[1],[2],[7],[9],[17]

2,623

[3],[10],[12],[18],[19]

Investments, at fair value

449

[1],[2],[4],[7],[9],[17]

[3],[5],[10],[12],[18],[19]

Investment, Identifier [Axis]: NRG Energy, Inc., Power

Schedule of Investments [Line Items]

Principal Amount

16,125

[1],[2],[9],[13]

19,125

[3],[12],[14]

Amortized Cost

15,658

[1],[2],[9]

18,668

[3],[12]

Investments, at fair value

12,917

[1],[2],[4],[9]

14,401

[3],[5],[12]

Investment, Identifier [Axis]: NuStar, Preferred Equity, Midstream

Schedule of Investments [Line Items]

Amortized Cost

73,650

[1],[2],[7],[9]

73,114

[3],[10],[12],[19]

Investments, at fair value

$ 83,272

[1],[2],[4],[7],[9]

$ 83,590

[3],[5],[10],[12],[19]

Investment, Identifier [Axis]: OE2 North, LLC, Midstream 1

Schedule of Investments [Line Items]

Variable rate

5.25%

[1],[2],[6],[7]

5.25%

[1],[2],[6],[7]

5.25%

[3],[10]

5.25%

[3],[10]

Principal Amount

$ 19,108

[1],[2],[7],[13]

$ 18,659

[3],[10],[14]

Amortized Cost

19,034

[1],[2],[7]

18,579

[3],[10]

Investments, at fair value

$ 19,243

[1],[2],[4],[7]

$ 18,847

[3],[5],[10]

Investment, Identifier [Axis]: OE2 North, LLC, Midstream 2

Schedule of Investments [Line Items]

Variable rate

5.25%

[1],[2],[6],[7],[15]

5.25%

[1],[2],[6],[7],[15]

5.25%

[3],[10],[16]

5.25%

[3],[10],[16]

Principal Amount

$ 10,892

[1],[2],[7],[13],[15]

$ 11,341

[3],[10],[14],[16]

Amortized Cost

10,892

[1],[2],[7],[15]

11,341

[3],[10],[16]

Investments, at fair value

$ 10,968

[1],[2],[4],[7],[15]

$ 11,455

[3],[5],[10],[16]

Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

3.25%

[1],[2],[6]

3.25%

[1],[2],[6]

3.25%

[3],[19]

3.25%

[3],[19]

Principal Amount

$ 26,289

[1],[2],[13]

$ 32,357

[3],[14],[19]

Amortized Cost

26,181

[1],[2]

32,220

[3],[19]

Investments, at fair value

$ 25,885

[1],[2],[4]

$ 32,026

[3],[5],[19]

Investment, Identifier [Axis]: Parkway Generation LLC, Power 1

Schedule of Investments [Line Items]

Variable rate

4.75%

[1],[2],[6]

4.75%

[1],[2],[6]

4.75%

[3]

4.75%

[3]

Principal Amount

$ 5,760

[1],[2],[13]

$ 5,760

[3],[14]

Amortized Cost

5,709

[1],[2]

5,708

[3]

Investments, at fair value

$ 5,577

[1],[2],[4]

$ 5,700

[3],[5]

Investment, Identifier [Axis]: Parkway Generation LLC, Power 2

Schedule of Investments [Line Items]

Variable rate

4.75%

[1],[2],[6]

4.75%

[1],[2],[6]

4.75%

[3]

4.75%

[3]

Principal Amount

$ 43,800

[1],[2],[13]

$ 43,910

[3],[14]

Amortized Cost

43,415

[1],[2]

43,513

[3]

Investments, at fair value

42,431

[1],[2],[4]

$ 43,285

[3],[5]

Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 1

Schedule of Investments [Line Items]

Variable rate

[3],[10],[19]

6.75%

Principal Amount

[3],[10],[14],[19]

$ 13,545

Amortized Cost

[3],[10],[19]

13,528

Investments, at fair value

[3],[5],[10],[19]

$ 13,394

Investment, Identifier [Axis]: Peak Exploration & Production, LLC, Upstream 2

Schedule of Investments [Line Items]

Variable rate

[3],[10],[16]

6.75%

Principal Amount

[3],[10],[14],[16]

$ 1,505

Amortized Cost

[3],[10],[16]

1,505

Investments, at fair value

[3],[5],[10],[16]

1,488

Investment, Identifier [Axis]: Permian Production Holdings, LLC

Schedule of Investments [Line Items]

Investments, at fair value

4,791

4,767

7,889

Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

6,103

11,420

8,829

Investment, Identifier [Axis]: Permian Production Holdings, LLC, Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

[1],[2],[7],[17],[24],[31]

[3],[10],[19],[25],[32]

Investments, at fair value

6,103

[1],[2],[4],[7],[17],[24],[31]

11,420

[3],[5],[10],[19],[25],[32]

Investment, Identifier [Axis]: Permian Production Holdings, LLC, Upstream

Schedule of Investments [Line Items]

Principal Amount

4,791

[1],[2],[7],[13],[31]

4,767

[3],[10],[14],[19],[32]

Amortized Cost

4,322

[1],[2],[7],[31]

4,266

[3],[10],[19],[32]

Investments, at fair value

$ 4,791

[1],[2],[4],[7],[31]

4,767

[3],[5],[10],[19],[32]

Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 1

Schedule of Investments [Line Items]

Principal Amount

[3],[14]

26,365

Amortized Cost

[3]

27,511

Investments, at fair value

[3],[5]

25,703

Investment, Identifier [Axis]: Permian Resources Operating LLC, Upstream 2

Schedule of Investments [Line Items]

Principal Amount

[3],[14],[19]

5,200

Amortized Cost

[3],[19]

5,257

Investments, at fair value

[3],[5],[19]

$ 4,473

Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 1

Schedule of Investments [Line Items]

Variable rate

6.75%

[1],[2],[6],[7]

6.75%

[1],[2],[6],[7]

6.75%

[3],[10]

6.75%

[3],[10]

Principal Amount

$ 9,370

[1],[2],[7],[13]

$ 9,370

[3],[10],[14]

Amortized Cost

9,308

[1],[2],[7]

9,304

[3],[10]

Investments, at fair value

$ 9,314

[1],[2],[4],[7]

$ 9,310

[3],[5],[10]

Investment, Identifier [Axis]: Pinnacle Midland Gas Holdco LLC, Midstream 2

Schedule of Investments [Line Items]

Variable rate

6.75%

[1],[2],[6],[7],[15]

6.75%

[1],[2],[6],[7],[15]

6.75%

[3],[10],[16]

6.75%

[3],[10],[16]

Principal Amount

$ 2,477

[1],[2],[7],[13],[15]

$ 2,477

[3],[10],[14],[16]

Amortized Cost

2,477

[1],[2],[7],[15]

2,477

[3],[10],[16]

Investments, at fair value

2,462

[1],[2],[4],[7],[15]

2,461

[3],[5],[10],[16]

Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Letter of Credit, Power

Schedule of Investments [Line Items]

Principal Amount

2,709

[1],[2],[7],[13],[15]

2,709

[3],[10],[14],[16]

Amortized Cost

2,709

[1],[2],[7],[15]

2,709

[3],[10],[16]

Investments, at fair value

[1],[2],[4],[7],[15]

[3],[5],[10],[16]

Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 1

Schedule of Investments [Line Items]

Principal Amount

12,704

[1],[2],[7],[13]

12,121

[3],[10],[14],[19]

Amortized Cost

12,704

[1],[2],[7]

12,121

[3],[10],[19]

Investments, at fair value

9,468

[1],[2],[4],[7]

9,997

[3],[5],[10],[19]

Investment, Identifier [Axis]: Plainfield Renewable Energy Holdings LLC, Power 2

Schedule of Investments [Line Items]

Principal Amount

3,827

[1],[2],[7],[13],[33]

3,643

[3],[10],[14],[19]

Amortized Cost

3,827

[1],[2],[7],[33]

3,643

[3],[10],[19]

Investments, at fair value

$ 0

[1],[2],[4],[7],[33]

$ 0

[3],[5],[10],[19]

Investment, Identifier [Axis]: Potomac Energy Center, LLC, Power

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6],[7]

[3],[10]

Principal Amount

$ 58,164

[1],[2],[7],[13]

$ 58,459

[3],[10],[14]

Amortized Cost

57,265

[1],[2],[7]

57,508

[3],[10]

Investments, at fair value

56,878

[1],[2],[4],[7]

58,443

[3],[5],[10]

Investment, Identifier [Axis]: Ranger Oil Corp., Upstream

Schedule of Investments [Line Items]

Principal Amount

[3],[12],[14]

29,772

Amortized Cost

[3],[12]

29,633

Investments, at fair value

[3],[5],[12]

29,678

Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

41,851

48,356

Investment, Identifier [Axis]: Ridgeback Resources Inc., Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

[3],[10],[12],[19],[32],[34]

46,599

Investments, at fair value

[3],[5],[10],[12],[19],[32],[34]

41,851

Investment, Identifier [Axis]: ST EIP Holdings Inc., Midstream

Schedule of Investments [Line Items]

Principal Amount

10,526

[1],[2],[7],[13]

10,526

[3],[10],[14]

Amortized Cost

10,076

[1],[2],[7]

10,064

[3],[10]

Investments, at fair value

10,164

[1],[2],[4],[7]

10,074

[3],[5],[10]

Investment, Identifier [Axis]: Saturn Oil & Gas Inc., Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

[1],[2],[9],[17],[35]

3,284

Investments, at fair value

[1],[2],[4],[9],[17],[35]

3,220

Investment, Identifier [Axis]: Segreto Power Holdings, LLC, Preferred Equity, Power

Schedule of Investments [Line Items]

Amortized Cost

99,761

[1],[2],[7],[17],[24],[33]

99,766

[3],[10],[18],[19],[25],[26]

Investments, at fair value

$ 86,037

[1],[2],[4],[7],[17],[24],[33]

$ 83,647

[3],[5],[10],[18],[19],[25],[26]

Investment, Identifier [Axis]: SilverBow Resources, Inc., Upstream

Schedule of Investments [Line Items]

Variable rate

7.50%

[1],[2],[6],[7],[9]

7.50%

[1],[2],[6],[7],[9]

7.50%

[3],[10],[12],[19]

7.50%

[3],[10],[12],[19]

Principal Amount

$ 14,250

[1],[2],[7],[9],[13]

$ 14,250

[3],[10],[12],[14],[19]

Amortized Cost

14,205

[1],[2],[7],[9]

14,199

[3],[10],[12],[19]

Investments, at fair value

$ 14,297

[1],[2],[4],[7],[9]

$ 14,322

[3],[5],[10],[12],[19]

Investment, Identifier [Axis]: Sitio Royalties Operating Partnership, LP, Upstream

Schedule of Investments [Line Items]

Variable rate

5.75%

[1],[2],[6],[7],[9]

5.75%

[1],[2],[6],[7],[9]

6.50%

[3],[10],[12],[19]

6.50%

[3],[10],[12],[19]

Principal Amount

$ 19,000

[1],[2],[7],[9],[13]

$ 19,500

[3],[10],[12],[14],[19]

Amortized Cost

18,835

[1],[2],[7],[9]

19,318

[3],[10],[12],[19]

Investments, at fair value

18,818

[1],[2],[4],[7],[9]

19,256

[3],[5],[10],[12],[19]

Investment, Identifier [Axis]: Suburban Propane Partners LP, Midstream

Schedule of Investments [Line Items]

Principal Amount

[3],[12],[14],[19]

7,590

Amortized Cost

[3],[12],[19]

7,837

Investments, at fair value

[3],[5],[12],[19]

6,461

Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC 2

Schedule of Investments [Line Items]

Investments, at fair value

52,937

51,098

50,770

Investment, Identifier [Axis]: Sustainable Infrastructure Investments, LLC, Power

Schedule of Investments [Line Items]

Principal Amount

60,603

[1],[2],[7],[9],[13],[17],[22]

60,603

[3],[10],[23],[36]

Amortized Cost

54,514

[1],[2],[7],[9],[17],[22]

54,514

[3],[10],[23],[36]

Investments, at fair value

52,937

[1],[2],[4],[7],[9],[17],[22]

51,098

[3],[5],[10],[23],[36]

Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Limited, Common Equity, Service & Equipment

Schedule of Investments [Line Items]

Amortized Cost

[3],[10],[12],[18],[19],[37]

6,029

Investments, at fair value

[3],[5],[10],[12],[18],[19],[37]

3,131

Investment, Identifier [Axis]: Tallgrass Energy Partners, LP, Midstream

Schedule of Investments [Line Items]

Principal Amount

9,761

[1],[2],[13]

19,761

[3],[14],[19]

Amortized Cost

9,580

[1],[2]

19,676

[3],[19]

Investments, at fair value

9,250

[1],[2],[4]

18,480

[3],[5],[19]

Investment, Identifier [Axis]: Telpico, LLC, Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

Investment, Identifier [Axis]: Telpico, LLC, Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

[1],[2],[7],[17],[24],[31]

[3],[10],[18],[19],[25],[32]

Investments, at fair value

[1],[2],[4],[7],[17],[24],[31]

[3],[5],[10],[18],[19],[25],[32]

Investment, Identifier [Axis]: Tenrgys, LLC, Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

7,571

[1],[2],[7],[17],[24]

7,571

[3],[10],[18],[19],[25]

Investments, at fair value

$ 5,672

[1],[2],[4],[7],[17],[24]

$ 6,801

[3],[5],[10],[18],[19],[25]

Investment, Identifier [Axis]: Tenrgys, LLC, Upstream

Schedule of Investments [Line Items]

Variable rate

7.50%

[1],[2],[6],[7]

7.50%

[1],[2],[6],[7]

7.50%

[3],[10],[19]

7.50%

[3],[10],[19]

Principal Amount

$ 20,537

[1],[2],[7],[13]

$ 20,537

[3],[10],[14],[19]

Amortized Cost

20,537

[1],[2],[7]

20,537

[3],[10],[19]

Investments, at fair value

20,691

[1],[2],[4],[7]

$ 20,537

[3],[5],[10],[19]

Investment, Identifier [Axis]: Traverse Midstream Partners LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

[3]

4.25%

Principal Amount

[3],[14]

$ 28,436

Amortized Cost

[3]

28,484

Investments, at fair value

[3],[5]

28,418

Investment, Identifier [Axis]: USA Compression Partners, LP, Common Equity, Midstream

Schedule of Investments [Line Items]

Amortized Cost

1,617

[1],[2],[9]

1,617

[3],[12],[18],[19]

Investments, at fair value

1,791

[1],[2],[4],[9]

1,655

[3],[5],[12],[18],[19]

Investment, Identifier [Axis]: USA Compression Partners, LP, Preferred Equity, Midstream

Schedule of Investments [Line Items]

Amortized Cost

77,991

[1],[2],[7],[9]

77,943

[3],[10]

Investments, at fair value

92,436

[1],[2],[4],[7],[9]

90,479

[3],[5],[10]

Investment, Identifier [Axis]: USA Compression Partners, LP, Warrants (Premium), Strike: $19.59, Midstream

Schedule of Investments [Line Items]

Amortized Cost

714

[1],[2],[7],[9],[17]

714

[3],[10],[12],[18],[19]

Investments, at fair value

6,380

[1],[2],[4],[7],[9],[17]

5,711

[3],[5],[10],[12],[18],[19]

Investment, Identifier [Axis]: Warren Resources, Inc.

Schedule of Investments [Line Items]

Investments, at fair value

23,644

23,584

23,688

Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity

Schedule of Investments [Line Items]

Investments, at fair value

29,828

36,982

$ 25,854

Investment, Identifier [Axis]: Warren Resources, Inc., Common Equity, Upstream

Schedule of Investments [Line Items]

Amortized Cost

20,754

[1],[2],[7],[17],[22]

20,754

[3],[10],[18],[19],[23]

Investments, at fair value

$ 29,828

[1],[2],[4],[7],[17],[22]

$ 36,982

[3],[5],[10],[18],[19],[23]

Investment, Identifier [Axis]: Warren Resources, Inc., Upstream

Schedule of Investments [Line Items]

Variable rate

[1],[2],[6],[7],[22]

[3],[10],[23]

Principal Amount

$ 23,644

[1],[2],[7],[13],[22]

$ 23,584

[3],[10],[14],[23]

Amortized Cost

23,644

[1],[2],[7],[22]

23,584

[3],[10],[23]

Investments, at fair value

$ 23,644

[1],[2],[4],[7],[22]

$ 23,584

[3],[5],[10],[23]

Investment, Identifier [Axis]: Wattbridge Inc., Power

Schedule of Investments [Line Items]

Variable rate

7.85%

[1],[2],[6],[7]

7.85%

[1],[2],[6],[7]

7.85%

[3],[10]

7.85%

[3],[10]

Principal Amount

$ 42,252

[1],[2],[7],[13]

$ 42,500

[3],[10],[14]

Amortized Cost

42,252

[1],[2],[7]

42,500

[3],[10]

Investments, at fair value

41,263

[1],[2],[4],[7]

41,880

[3],[5],[10]

Sustainable Infrastructure Investments, LLC

Schedule of Investments [Line Items]

Principal Amount

272,680

274,088

Amortized Cost

272,680

274,088

Investments, at fair value

$ 275,610

$ 275,058

Percent of net assets

100%

Sustainable Infrastructure Investments, LLC | London Interbank Offered Rate (LIBOR)

Schedule of Investments [Line Items]

Variable rate

5.19%

4.77%

Sustainable Infrastructure Investments, LLC | Canadian Dollar Offer Rate

Schedule of Investments [Line Items]

Variable rate

5.03%

4.94%

Sustainable Infrastructure Investments, LLC | Net Senior Secured Loans—First Lien

Schedule of Investments [Line Items]

Amortized Cost

$ 272,680

$ 274,088

Investments, at fair value

$ 275,610

$ 275,058

Percent of net assets

100%

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Alianca Transportadora de Gas Participacoes S.A., Midstream

Schedule of Investments [Line Items]

Variable rate

2.60%

Principal Amount

$ 73,707

Amortized Cost

73,707

Investments, at fair value

$ 75,719

$ 74,601

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Blue Heron Intermediate Holdco I, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

1.88%

Principal Amount

$ 31,538

$ 31,832

Amortized Cost

31,538

31,832

Investments, at fair value

$ 31,619

$ 31,885

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Cedar Creek II LLC, Renewables

Schedule of Investments [Line Items]

Variable rate

1.88%

Principal Amount

$ 8,711

$ 8,710

Amortized Cost

8,711

8,710

Investments, at fair value

$ 8,852

$ 8,722

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Copper Mountain Solar 3, LLC, Renewables

Schedule of Investments [Line Items]

Variable rate

1.75%

Principal Amount

$ 17,804

Amortized Cost

17,804

Investments, at fair value

$ 18,241

$ 17,879

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: FLNG Liquefaction 2, LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

1.50%

Principal Amount

$ 27,780

$ 28,170

Amortized Cost

27,780

28,170

Investments, at fair value

27,624

27,990

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Largest Portfolio Company Investment

Schedule of Investments [Line Items]

Principal Amount

$ 73,707

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Meikle Wind Energy, LP, Renewables

Schedule of Investments [Line Items]

Variable rate

1.50%

Principal Amount

$ 15,637

$ 16,030

Amortized Cost

$ 12,029

$ 12,332

Investments, at fair value

$ 11,585

$ 11,873

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: NES Hercules Class B Member, LLC, Renewables

Schedule of Investments [Line Items]

Variable rate

1.65%

1.50%

Principal Amount

$ 24,317

$ 24,487

Amortized Cost

24,317

24,487

Investments, at fair value

$ 24,764

$ 24,954

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: ST EIP Holdco LLC, Midstream

Schedule of Investments [Line Items]

Variable rate

2.50%

Principal Amount

$ 58,421

$ 58,673

Amortized Cost

58,421

58,673

Investments, at fair value

$ 58,156

$ 58,288

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Seine Funding, LLC

Schedule of Investments [Line Items]

Variable rate

1.20%

Principal Amount

$ 634,103

Sustainable Infrastructure Investments, LLC | Investment, Identifier [Axis]: Top of the World Wind Energy LLC, Renewables

Schedule of Investments [Line Items]

Variable rate

1.88%

Principal Amount

$ 18,373

Amortized Cost

18,373

Investments, at fair value

$ 19,050

$ 18,866

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]Security may be an obligation of one or more entities affiliated with the named company.[4]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[6]Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of March 31, 2023 , the three-month London Interbank Offered Rate, or LIBOR, or L, was 5.19% and the Secured Overnight Financing Rate, or SOFR, or S, was 4.91%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases. March 31, 2023 , 76.7% of the Company’s total assets represented qualifying assets. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 8,436 $ 113 $ (996) $ — $ — $ 7,553 $ 52 $ 113 Allied Wireline Services, LLC 63,888 — — — — 63,888 1,597 — Warren Resources, Inc. 23,584 60 — — — 23,644 810 59 Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 51,098 — — — 1,839 52,937 — — Equity/Other Allied Wireline Services, LLC, Common Equity 10,463 — — — 1,922 12,385 — — Allied Wireline Services, LLC, Warrants — — — — — — — — Warren Resources, Inc., Common Equity 36,982 — — — (7,154) 29,828 — — $ 194,451 $ 173 $ (996) $ — $ (3,393) $ 190,235 $ 2,459 $ 172 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. Under the 1940 Act, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” of and deemed to “control.” The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Dividend Income (3) Senior Secured Loans—First Lien Allied Downhole Technologies, LLC (4) $ 7,782 $ 654 $ — $ — $ — $ 8,436 $ — $ 654 $ — Allied Wireline Services, LLC 46,339 5,808 — — 11,741 63,888 316 5,808 — MECO IV Holdco, LLC 22,745 455 (23,200) — — — — 455 — Warren Resources, Inc. 23,688 237 (341) — — 23,584 2,620 237 — Sustainable Infrastructure Investments, LLC Sustainable Infrastructure Investments, LLC 50,770 — — — 328 51,098 — — 735 Equity/Other Allied Wireline Services, LLC, Common Equity — — — — 10,463 10,463 — — — Allied Wireline Services, LLC, Warrants — — — — — — — — — MECO IV Holdco, LLC, Class A-1 Units 4,181 — (18,060) 15,899 (2,020) — — — — Warren Resources, Inc., Common Equity 25,854 — — — 11,128 36,982 — — — $ 181,359 $ 7,154 $ (41,601) $ 15,899 $ 31,640 $ 194,451 $ 2,936 $ 7,154 $ 735 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK and dividend income presented for the year ended December 31, 2022. ( 4) Security includes a partially unfunded commitment with amortized cost of $2,500 and fair value of $2,500. December 31, 2022 . Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of March 31, 2023, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of March 31, 2023: Portfolio Company Fair Value at December 31, 2022 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at March 31, 2023 Interest Income (3) PIK Income (3) Senior Secured Loans—First Lien Permian Production Holdings, LLC $ 4,767 $ 56 $ — $ — $ (32) $ 4,791 $ 157 $ 24 Equity/Other GWP Midstream Holdco, LLC, Common Equity 5,044 — — — (1,437) 3,607 — — Harvest Oil & Gas Corp., Common Equity 810 — (506) — 506 810 — — Limetree Bay Energy, LLC, Class A Units 1,885 83 — — (1,029) 939 — — Permian Production Holdings, LLC, Common Equity 11,420 — — — (5,317) 6,103 — — Ridgeback Resources Inc., Common Equity 41,851 — (35,240) (11,359) 4,748 — — — Telpico, LLC, Common Equity — — — — — — — — $ 65,777 $ 139 $ (35,746) $ (11,359) $ (2,561) $ 16,250 $ 157 $ 24 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest and PIK income presented for the three months ended March 31, 2023. Under the 1940 Act, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022 , the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2022 : Portfolio Company Fair Value at December 31, 2021 Gross Additions (1) Gross Reductions (2) Net Realized Gain (Loss) Net Change in Unrealized Appreciation (Depreciation) Fair Value at December 31, 2022 Interest Income (3) PIK Income (3) Fee Income (3) Dividend Income (3) Senior Secured Loans—First Lien Limetree Bay Energy, LLC $ 3,166 $ — $ (1,587) $ (12,756) $ 11,177 $ — $ — $ — $ — $ — Permian Production Holdings, LLC 7,889 697 (3,674) 551 (696) 4,767 570 105 — — Senior Secured Bonds Great Western Petroleum, LLC 58,055 96 (55,096) 1,087 (4,142) — 2,649 — 7,268 — Equity/Other Great Western Petroleum, LLC, Common Equity 40,731 — (84,871) 54,081 (9,941) — — — — — GWP Midstream Holdco, LLC, Common Equity — 6,681 — — (1,637) 5,044 — — — — Harvest Oil & Gas Corp., Common Equity 2,836 — (743) — (1,283) 810 — — — — Limetree Bay Energy, LLC, Class A Units 6,046 1,795 — — (5,956) 1,885 — — — — Permian Production Holdings, LLC, Common Equity 8,829 4 — — 2,587 11,420 — — — 1,726 Ridgeback Resources Inc., Common Equity 48,356 — (12,559) 173 5,881 41,851 — — — 3,691 Telpico, LLC, Common Equity — — — — — — — — — — $ 175,908 $ 9,273 $ (158,530) $ 43,136 $ (4,010) $ 65,777 $ 3,219 $ 105 $ 7,268 $ 5,417 _____________ (1) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company into this category from a different category. (2) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and/or the movement of an existing portfolio company out of this category into a different category. (3) Interest, PIK, fee and dividend income presented for the year ended December 31, 2022. Investment denominated in Canadian dollars. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 Investment denominated in British pounds. Amortized cost and fair value are converted into U.S. dollars as of December 31, 2022 .

Investment Portfolio - Balance

Investment Portfolio - Balance Sheet Information for SIIJV (Details) - USD ($) $ in Thousands	Mar. 31, 2023		Dec. 31, 2022		Mar. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Investments, at fair value	$ 1,742,661	[1],[2],[3]	$ 2,047,115	[4],[5]
Total assets	2,200,417		2,558,781
Total liabilities	487,589		805,033
Total shareholders' equity	1,712,828		1,753,748		$ 1,783,915	$ 1,602,323
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Investments, at fair value	275,610		275,058
Cash and other assets	7,152		10,380
Total assets	282,762		285,438
Debt	208,021		213,583
Other liabilities	2,789		3,358
Total liabilities	210,810		216,941
Total shareholders' equity	$ 71,952		$ 68,497

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[4]Security may be an obligation of one or more entities affiliated with the named company.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.

Investment Portfolio - Operatio

Investment Portfolio - Operations Information for SIIJV (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Schedule of Investments [Line Items]
Total investment income		$ 43,095	$ 35,909
Interest expense	[1]	12,598	13,694
Administrative services		1,320	1,420
Custodian and accounting fees		751	720
Professional services		183	177
Total operating expenses		26,193	28,417
Net realized and unrealized gain (loss)		(49,711)	181,593
Sustainable Infrastructure Investments, LLC
Schedule of Investments [Line Items]
Total investment income		4,798	11,463
Interest expense		3,141	6,994
Administrative services		43	166
Custodian and accounting fees		45	184
Professional services		50	125
Other		10	54
Total operating expenses		3,289	7,523
Net investment income		1,509	3,940
Net realized and unrealized gain (loss)		1,946	(821)
Net increase (decrease) in net assets resulting from operations		$ 3,455	$ 3,119

[1]See Note 9 for a discussion of the Company's financing arrangements.

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Schedule of Fair Value Hierarchy Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023		Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, at fair value	$ 1,742,661	[1],[2],[3]	$ 2,047,115	[4],[5]
Level 1—Price quotations in active markets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, at fair value	5,011		2,465
Level 2—Significant other observable inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, at fair value	229,247		450,445
Level 3—Significant unobservable inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, at fair value	$ 1,508,403		$ 1,594,205

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[4]Security may be an obligation of one or more entities affiliated with the named company.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Assets and Liabilities Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 379	$ 0
Liabilities	0	698
Level 1—Price quotations in active markets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Liabilities	0	0
Level 2—Significant other observable inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	379	0
Liabilities	0	698
Level 3—Significant unobservable inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Liabilities	$ 0	$ 0

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Reconciliation Fair Value, Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Accretion of discount (amortization of premium)	$ 1,262	$ 2,029
Total
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	1,594,205	1,621,482
Accretion of discount (amortization of premium)	1,050	2,064
Purchases	25,032	90,049
Paid-in-kind interest	4,502	5,128
Sales and repayments	(61,981)	(154,231)
Transfers into Level 3	810	58,705
Transfers out of Level 3	0	0
Fair value at end of period	1,508,403	1,815,677
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	(50,742)	187,778
Total \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	(17,800)	(39,525)
Total \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	(37,415)	232,005
Senior Secured Loans—First Lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	443,245	414,075
Accretion of discount (amortization of premium)	349	549
Purchases	24,949	17,642
Paid-in-kind interest	2,395	1,097
Sales and repayments	(8,110)	(74,622)
Transfers into Level 3	0	58,705
Transfers out of Level 3	0	0
Fair value at end of period	454,083	429,423
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	(8,789)	14,611
Senior Secured Loans—First Lien \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	(2,806)	(12,397)
Senior Secured Loans—First Lien \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	(5,939)	24,374
Senior Secured Loans—Second Lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	143,270	84,083
Accretion of discount (amortization of premium)	81	74
Purchases	0	63,250
Paid-in-kind interest	0	0
Sales and repayments	(15,545)	(17,576)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value at end of period	128,043	130,401
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	228	359
Senior Secured Loans—Second Lien \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	9	434
Senior Secured Loans—Second Lien \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	228	136
Senior Secured Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	10,074	10,371
Accretion of discount (amortization of premium)	12	13
Purchases	0	0
Paid-in-kind interest	0	0
Sales and repayments	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value at end of period	10,164	10,490
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	78	106
Senior Secured Bonds \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	0	0
Senior Secured Bonds \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	78	106
Unsecured Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	54,374	104,659
Accretion of discount (amortization of premium)	29	22
Purchases	0	0
Paid-in-kind interest	2,107	3,843
Sales and repayments	(500)	(47,571)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value at end of period	56,043	67,889
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	28	(22)
Unsecured Debt \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	5	(27,729)
Unsecured Debt \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	28	34,665
Preferred Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	400,414	497,288
Accretion of discount (amortization of premium)	579	1,406
Purchases	0	0
Paid-in-kind interest	0	188
Sales and repayments	0	(14,462)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value at end of period	414,699	483,647
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	13,706	(940)
Preferred Equity \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	0	167
Preferred Equity \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	13,706	(940)
Sustainable Infrastructure Investments, LLC
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	51,098	50,770
Accretion of discount (amortization of premium)	0	0
Purchases	0	0
Paid-in-kind interest	0	0
Sales and repayments	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value at end of period	52,937	52,100
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	1,839	1,330
Sustainable Infrastructure Investments, LLC \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	0	0
Sustainable Infrastructure Investments, LLC \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	1,839	1,330
Equity/Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	491,730	460,236
Accretion of discount (amortization of premium)	0	0
Purchases	83	9,157
Paid-in-kind interest	0	0
Sales and repayments	(37,826)	0
Transfers into Level 3	810	0
Transfers out of Level 3	0	0
Fair value at end of period	392,434	641,727
The amount of total gains or losses for the period included in changes in net assets attributable to the change in unrealized gains or losses relating to investments still held at the reporting date	(57,832)	172,334
Equity/Other \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	(15,008)	0
Equity/Other \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized gain (loss)	$ (47,355)	$ 172,334

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Schedule of Valuation Techniques and Significant Unobservable Inputs Used in Recurring Level 3 Fair Value (Details)	Mar. 31, 2023 USD ($)		Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 1,742,661,000	[1],[2],[3]	$ 2,047,115,000	[4],[5]
Level 3—Significant unobservable inputs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	1,508,403,000		1,594,205,000
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 441,261,000		$ 413,268,000
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Minimum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.083		0.085
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Minimum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	5.9		5
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Maximum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.208		0.218
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Maximum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	6.2		7.5
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Weighted Average \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.123		0.123
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Market Comparables \| Weighted Average \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	6		6.3
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 12,822,000		$ 29,977,000
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Discounted Cash Flow \| Minimum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.075		0.115
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Discounted Cash Flow \| Maximum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.125		0.195
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—First Lien \| Discounted Cash Flow \| Weighted Average \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.100		0.154
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—Second Lien \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 128,043,000		$ 143,270,000
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—Second Lien \| Market Comparables \| Minimum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.100		0.103
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—Second Lien \| Market Comparables \| Maximum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.133		0.143
Level 3—Significant unobservable inputs \| Net Senior Secured Loans—Second Lien \| Market Comparables \| Weighted Average \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.116		0.118
Level 3—Significant unobservable inputs \| Senior Secured Bonds \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 10,164,000		$ 10,074,000
Level 3—Significant unobservable inputs \| Senior Secured Bonds \| Market Comparables \| Minimum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.069		0.069
Level 3—Significant unobservable inputs \| Senior Secured Bonds \| Market Comparables \| Maximum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.079		0.079
Level 3—Significant unobservable inputs \| Senior Secured Bonds \| Market Comparables \| Weighted Average \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.074		0.074
Level 3—Significant unobservable inputs \| Unsecured Debt \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 18,818,000		$ 19,256,000
Level 3—Significant unobservable inputs \| Unsecured Debt \| Market Comparables \| Minimum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.100		0.103
Level 3—Significant unobservable inputs \| Unsecured Debt \| Market Comparables \| Maximum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.110		0.113
Level 3—Significant unobservable inputs \| Unsecured Debt \| Market Comparables \| Weighted Average \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.105		0.108
Level 3—Significant unobservable inputs \| Unsecured Debt \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 37,225,000		$ 35,118,000
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 328,662,000		$ 316,767,000
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Minimum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.103		0.088
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Minimum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	10.3		9.5
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Minimum \| Net Aircraft Book Value Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	1		1
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Maximum \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.283		0.303
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Maximum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	11.3		10.5
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Maximum \| Net Aircraft Book Value Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	1		1
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Weighted Average \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.188		0.190
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Weighted Average \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	10.8		10
Level 3—Significant unobservable inputs \| Preferred Equity \| Market Comparables \| Weighted Average \| Net Aircraft Book Value Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	1		1
Level 3—Significant unobservable inputs \| Preferred Equity \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 86,037,000		$ 83,647,000
Level 3—Significant unobservable inputs \| Preferred Equity \| Discounted Cash Flow \| Minimum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.115		0.113
Level 3—Significant unobservable inputs \| Preferred Equity \| Discounted Cash Flow \| Maximum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.120		0.123
Level 3—Significant unobservable inputs \| Preferred Equity \| Discounted Cash Flow \| Weighted Average \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.118		0.118
Level 3—Significant unobservable inputs \| Sustainable Infrastructure Investments, LLC \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 52,937,000		$ 51,098,000
Level 3—Significant unobservable inputs \| Sustainable Infrastructure Investments, LLC \| Discounted Cash Flow \| Minimum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.135		0.135
Level 3—Significant unobservable inputs \| Sustainable Infrastructure Investments, LLC \| Discounted Cash Flow \| Maximum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.145		0.145
Level 3—Significant unobservable inputs \| Sustainable Infrastructure Investments, LLC \| Discounted Cash Flow \| Weighted Average \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.140		0.140
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 349,629,000		$ 481,623,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	3.8		1.8
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| Production Multiples (Mboe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	27,578,000		27,946,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| Proved Reserves Multiples (Mmboe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	5,800		6,900
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| Production Multiples (MMcfe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	2,850,000		3,400,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| Proved Reserves Multiples (Bcfe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.7		0.8
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Minimum \| PV-10 Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.3		0.5
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	11.3		10.5
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| Production Multiples (Mboe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	31,344,000		37,500,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| Proved Reserves Multiples (Mmboe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	6,600		10,300
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| Production Multiples (MMcfe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	3,150,000		3,700,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| Proved Reserves Multiples (Bcfe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.7		0.9
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Maximum \| PV-10 Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.9		0.9
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	4.9		5.4
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| Production Multiples (Mboe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	29,447,000		30,265,300
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| Proved Reserves Multiples (Mmboe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	6,200		7,600
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| Production Multiples (MMcfe/d)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	3,000,000		3,550,000
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| Proved Reserves Multiples (Bcfe)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.7		0.8
Level 3—Significant unobservable inputs \| Equity/Other \| Market Comparables \| Weighted Average \| PV-10 Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.8		0.8
Level 3—Significant unobservable inputs \| Equity/Other \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 13,683,000		$ 2,488,000
Level 3—Significant unobservable inputs \| Equity/Other \| Discounted Cash Flow \| Minimum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.080		0.080
Level 3—Significant unobservable inputs \| Equity/Other \| Discounted Cash Flow \| Maximum \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.330		0.330
Level 3—Significant unobservable inputs \| Equity/Other \| Discounted Cash Flow \| Weighted Average \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.134		0.238
Level 3—Significant unobservable inputs \| Equity/Other \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 21,634,000		$ 1,885,000
Level 3—Significant unobservable inputs \| Equity/Other \| Option Valuation Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	$ 7,488,000		$ 5,734,000
Level 3—Significant unobservable inputs \| Equity/Other \| Option Valuation Model \| Minimum \| Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.281		0.315
Level 3—Significant unobservable inputs \| Equity/Other \| Option Valuation Model \| Maximum \| Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.650		0.551
Level 3—Significant unobservable inputs \| Equity/Other \| Option Valuation Model \| Weighted Average \| Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.371		0.366

[1]Security may be an obligation of one or more entities affiliated with the named company.[2]Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Notes with JPMorgan Chase Bank, N.A. (see Note 9).[3]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.[4]Security may be an obligation of one or more entities affiliated with the named company.[5]See Note 8 for additional information regarding the fair value of the Company’s financial instruments.

Financing Arrangements - Outsta

Financing Arrangements - Outstanding Financing Arrangements (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Feb. 14, 2023	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Amount Outstanding		$ 457,075	$ 762,751
Amount Available		$ 0	0
JPMorgan Facility \| Line of Credit
Debt Instrument [Line Items]
Amount Outstanding			305,676
Amount Available			$ 0
Debt instrument, variable rate floor	0%
JPMorgan Facility \| Line of Credit \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	3%		3%
Debt instrument, variable rate floor		0%
Senior Secured Notes \| Secured Debt
Debt Instrument [Line Items]
Stated interest rate		7.50%	7.50%
Amount Outstanding		$ 457,075	$ 457,075
Amount Available		0	0
Fair value		$ 457,569	$ 458,908

Financing Arrangements - Intere

Financing Arrangements - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Short-Term Debt [Line Items]
Direct Interest Expense	$ 11,360	$ 11,509
Amortization of Deferred Financing Costs and Discount	1,238	2,185
Total Interest Expense	12,598	13,694
JPMorgan Facility \| Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	2,790	2,405
Amortization of Deferred Financing Costs and Discount	238	905
Total Interest Expense	3,028	3,310
Senior Secured Notes \| Secured Debt
Short-Term Debt [Line Items]
Direct Interest Expense	8,570	9,104
Amortization of Deferred Financing Costs and Discount	1,000	1,280
Total Interest Expense	$ 9,570	$ 10,384

Financing Arrangements - Narrat

Financing Arrangements - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 14, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Amount outstanding		$ 606,516	$ 779,774
Average outstanding		8.31%	7.02%
Debt instrument, interest rate, effective percentage		7.50%	5.91%
JPMorgan Facility \| Line of Credit
Debt Instrument [Line Items]
Principal amount outstanding	$ 305,676
Debt instrument, variable rate floor	0%
JPMorgan Facility \| Line of Credit \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, variable rate floor		0%
Basis spread on variable rate	3%			3%

Financial Highlights (Details)

Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in USD per Share)	$ 3.88	$ 3.59	$ 3.59
Results of operations
Net investment income (in USD per share)	0.04		0.16
Net realized gain (loss) and unrealized appreciation (depreciation) (in USD per share)	(0.11)		0.25
Net increase (decrease) in net assets resulting from operations (in USD per share)	(0.07)		0.41
Distribution Amount
Distributions from net investment income (in USD per share)	(0.03)		(0.12)
Net decrease in net assets resulting from shareholder distributions (in USD per share)	(0.03)	$ (0.03)	(0.12)
Capital share transactions
Issuance of common shares (in USD per share)	0		0
Net increase (decrease) in net assets resulting from capital share transactions (in USD per share)	0		0
Net asset value, end of period (in USD per share)	$ 3.78		$ 3.88
Shares outstanding, end of period (in shares)	452,787,008		451,465,673
Total return	(1.82%)		11.39%
Total return (without assuming reinvestment of distributions)	(1.80%)		11.29%
Net assets, end of period	$ 1,712,828	$ 1,783,915	$ 1,753,748	$ 1,602,323
Ratio/Supplemental Data:
Ratio of net investment income to average net assets	3.84%		4.02%
Ratio of total operating expenses to average net assets	5.93%		6.78%
Ratio of management fee offset to average net assets	(0.01%)		(0.15%)
Ratio of net operating expenses to average net assets	5.92%		6.63%
Ratio of interest expense to average net assets	2.85%		3.21%
Portfolio turnover	1.30%		16.15%
Total amount of senior securities outstanding, exclusive of treasury securities	$ 457,075		$ 762,751
Asset coverage per unit	475%		330%
Ratio of net investment income to average net assets if advisor had not agreement to offset management fee payable	3.83%	3.87%