MML Series Investment Fund II NPORTP MML iShares 80/20 Allocation Fund (Mar 2024 report)

MML Blend Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EXCHANGE-TRADED FUNDS — 100.0%
iShares 5-10 Year Investment Grade Corporate Bond ETF (a)		508,521	$	26,239,684
iShares Core S&P 500 ETF		366,455		192,656,387
iShares Core S&P Mid-Cap ETF		257,631		15,648,507
iShares Core S&P Small-Cap ETF		58,321		6,445,637
iShares Core S&P Total US Stock Market ETF		1,837,112		211,819,013
iShares Core Total USD Bond Market ETF (a)		2,403,295		109,566,219
iShares Core U.S. Aggregate Bond ETF		1,118,540		109,549,808
iShares iBoxx High Yield Corporate Bond ETF (a)		337,308		26,218,951

TOTAL EXCHANGE-TRADED FUNDS (Cost $610,596,435)				698,144,206

TOTAL LONG-TERM INVESTMENTS (Cost $610,596,435)				698,144,206


SHORT-TERM INVESTMENTS — 5.4%
Investment of Cash Collateral from Securities Loaned — 5.4%
State Street Navigator Securities Lending Government Money Market Portfolio (b)		37,579,372		37,579,372

	Principal Amount
Repurchase Agreement — 0.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (c)	$	211,174		211,174

TOTAL SHORT-TERM INVESTMENTS (Cost $37,790,546)				37,790,546

TOTAL INVESTMENTS — 105.4% (Cost $648,386,981) (d)				735,934,752

Other Assets/(Liabilities) — (5.4)%				(37,387,528)

NET ASSETS — 100.0%			$	698,547,224

Abbreviation Legend

ETF	Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $38,963,152 or 5.58% of net assets. The Fund received $2,273,015 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(b)	Represents investment of security lending cash collateral. (Note 2).

(c)	Maturity value of $211,211. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $215,458.

(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Dynamic Bond Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 98.8%

BANK LOANS — 2.9%
Beverages — 0.1%
Triton Water Holdings, Inc., Term Loan, 3 mo. USD Term SOFR + 3.250%,
8.562% VRN 3/31/28	$	215,673	$	213,220
Commercial Services — 0.1%
Allied Universal Holdco LLC, 2021 USD Incremental Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.180% VRN 5/12/28		226,925		226,555
Computers — 0.0%
Peraton Corp., Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.180% VRN 2/01/28		64,713		64,592
Diversified Financial Services — 0.2%
Castlelake Aviation Ltd., Term Loan B, 3 mo. USD Term SOFR + 2.500%
7.829% VRN 10/22/26		101,881		101,862
Citadel Securities LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.577% VRN 7/29/30		164,979		164,763
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.059% VRN 4/09/27		76,113		75,700
Focus Financial Partners LLC, 2024 Term Loan B7, 1 mo. USD Term SOFR + 2.750%
8.080% VRN 6/30/28		108,353		107,947
				450,272
Engineering & Construction — 0.1%
Brown Group Holding LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.180% VRN 6/07/28		273,974		273,640
Entertainment — 0.5%
Caesars Entertainment, Inc.
2024 Term Loan B1, 3 mo. USD Term SOFR + 2.750%
8.040% VRN 2/06/31		260,000		260,000
Term Loan B, 3 mo. USD Term SOFR + 3.250%
8.663% VRN 2/06/30		19,800		19,833
Flutter Financing BV, Term Loan B, 3 mo. USD Term SOFR + 2.250%
7.559% VRN 11/25/30		239,400		239,271
Light and Wonder International, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.075% VRN 4/14/29		265,950		266,208
PCI Gaming Authority, Term Loan, 1 mo. USD Term SOFR + 2.500%
7.945% VRN 5/29/26		255,325		255,616
UFC Holdings LLC, 2021 Term Loan B, 3 mo. USD Term SOFR + 2.750%
8.336% VRN 4/29/26		142,703		142,881
				1,183,809

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Health Care – Products — 0.1%
Sotera Health Holdings LLC, 2021 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.195% VRN 12/11/26	$	270,000	$	268,537
Health Care – Services — 0.1%
ICON Luxembourg SARL, 2024 LUX Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.302% VRN 7/03/28		41,042		41,113
Phoenix Guarantor, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 3.250%
8.577% VRN 2/21/31		228,211		225,105
PRA Health Sciences, Inc., 2024 US Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.302% VRN 7/03/28		10,226		10,244
				276,462
Insurance — 0.2%
Acrisure LLC
2020 Term Loan B, 1 mo. USD LIBOR + 3.500%
8.945% VRN 2/15/27		119,389		119,134
2021 First Lien Term Loan B, 1 mo. USD LIBOR + 4.250%
9.695% VRN 2/15/27		122,188		122,340
AmWINS Group, Inc.
2021 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.695% VRN 2/19/28		37,492		37,486
2023 Incremental Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.195% VRN 2/19/28		29,625		29,654
Asurion LLC
2020 Term Loan B8, 1 mo. USD Term SOFR + 3.250%
8.692% VRN 12/23/26		150,350		147,074
2021 Term Loan B9, 1 mo. USD Term SOFR + 3.250%
8.692% VRN 7/31/27		73,120		70,130
				525,818
Leisure Time — 0.1%
Alterra Mountain Co., 2021 Series B-2 Consenting Term Loan, 1 mo. USD Term SOFR + 3.500%
8.945% VRN 8/17/28		155,965		156,421
Lodging — 0.0%
Four Seasons Hotels Ltd., 2024 Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.430% VRN 11/30/29		89,773		89,807
Machinery - Diversified — 0.1%
TK Elevator US Newco, Inc., USD Term Loan B, 1 Week USD Term SOFR + 3.500%
8.791% VRN 4/30/30		193,597		194,162
Machinery – Diversified — 0.0%
Ali Group North America Corp., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.445% VRN 7/30/29		96,165		96,129
Media — 0.1%
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 1 mo. USD Term SOFR + 2.500%
7.945% VRN 9/18/26		200,753		200,697

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pharmaceuticals — 0.2%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD Term SOFR + 4.000%
9.409% VRN 10/01/27	$	163,372	$	155,938
Jazz Financing Lux SARL, USD Term Loan, 1 mo. USD TERM SOFR + 3.000%
8.445% 5/05/28		197,038		198,024
				353,962
Pipelines — 0.1%
CQP Holdco LP, 2023 4th Amendment Term Loan, 3 mo. USD Term SOFR + 3.000%
8.302% VRN 12/31/30		193,834		194,388
Private Equity — 0.2%
GTCR W Merger Sub LLC, USD Term Loan B, 1 mo. USD Term SOFR + 3.000%
8.309% VRN 1/31/31		320,000		320,867
Retail — 0.2%
Harbor Freight Tools USA, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.195% VRN 10/19/27		338,270		337,922
Software — 0.3%
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.580% VRN 2/15/29		140,929		139,410
Cotiviti Corp., 2024 Term Loan,
0.000% 2/21/31 (a)		350,000		349,125
UKG, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.500%
8.814% VRN 2/10/31		92,633		93,073
				581,608
Transportation — 0.2%
Genesee & Wyoming, Inc., Term Loan, 3 mo. USD Term SOFR + 2.000%
7.402% VRN 12/30/26		402,915		402,947

TOTAL BANK LOANS (Cost $6,387,149)				6,411,815

CORPORATE DEBT — 36.4%
Advertising — 0.0%
Clear Channel Outdoor Holdings, Inc.
7.500% 6/01/29 (b)		95,000		78,569
Aerospace & Defense — 1.1%
Boeing Co.
2.196% 2/04/26		80,000		74,896
2.800% 3/01/27		290,000		267,794
2.950% 2/01/30		270,000		233,187
3.750% 2/01/50		40,000		27,826
5.705% 5/01/40		60,000		57,428
General Dynamics Corp.
4.250% 4/01/40		20,000		18,133
4.250% 4/01/50		50,000		43,548
L3Harris Technologies, Inc.
5.054% 4/27/45		80,000		75,537

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Lockheed Martin Corp.
3.900% 6/15/32	$	50,000	$	46,922
4.150% 6/15/53		320,000		269,925
5.200% 2/15/64		40,000		39,552
Northrop Grumman Corp.
2.930% 1/15/25		160,000		157,016
3.250% 1/15/28		150,000		141,738
5.150% 5/01/40		280,000		274,309
RTX Corp.
2.250% 7/01/30		110,000		93,911
3.030% 3/15/52		180,000		119,186
4.125% 11/16/28		160,000		154,765
4.500% 6/01/42		80,000		71,379
6.000% 3/15/31		110,000		115,633
TransDigm, Inc.
6.375% 3/01/29 (b)		40,000		40,124
6.625% 3/01/32 (b)		50,000		50,515
7.125% 12/01/31 (b)		80,000		82,445
				2,455,769
Agriculture — 0.7%
Altria Group, Inc.
2.450% 2/04/32		140,000		113,606
5.800% 2/14/39		240,000		243,196
5.950% 2/14/49		130,000		132,305
6.875% 11/01/33		290,000		315,480
BAT Capital Corp.
3.462% 9/06/29		405,000		369,647
4.540% 8/15/47		130,000		100,372
Philip Morris International, Inc.
4.500% 3/20/42		80,000		69,895
4.875% 2/13/29		60,000		59,618
5.125% 2/13/31		20,000		19,869
5.250% 2/13/34		50,000		49,557
				1,473,545
Airlines — 0.3%
American Airlines, Inc.
8.500% 5/15/29 (b)		90,000		95,081
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.750% 10/20/28 (b)		400,000		391,223
Mileage Plus Holdings LLC/Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (b)		103,843		104,416
United Airlines, Inc.
4.625% 4/15/29 (b)		65,000		60,450
				651,170
Apparel — 0.0%
NIKE, Inc.
2.850% 3/27/30		60,000		54,214
Auto Manufacturers — 1.2%
Ford Motor Co.
3.250% 2/12/32		1,530,000		1,272,662
6.100% 8/19/32 (c)		90,000		91,199

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Ford Motor Credit Co. LLC
4.950% 5/28/27	$	200,000	$	195,142
General Motors Co.
5.600% 10/15/32 (c)		125,000		126,502
General Motors Financial Co., Inc.
2.400% 10/15/28		275,000		243,378
Hyundai Capital America
1.800% 10/15/25 (b)		55,000		51,983
Nissan Motor Co. Ltd.
3.522% 9/17/25 (b)		410,000		395,226
4.345% 9/17/27 (b)		300,000		285,199
				2,661,291
Banks — 11.2%
ABN AMRO Bank NV
4.750% 7/28/25 (b)		260,000		255,993
Banco Santander SA
3.496% 3/24/25		600,000		589,019
Bank of America Corp.
5 yr. CMT + 1.200% 2.482% VRN 9/21/36		520,000		415,913
Secured Overnight Financing Rate + 1.210% 2.572% VRN 10/20/32		190,000		157,628
Secured Overnight Financing Rate + 1.330% 2.972% VRN 2/04/33		670,000		569,795
3 mo. USD Term SOFR + 1.632% 3.593% VRN 7/21/28		1,430,000		1,359,185
3 mo. USD Term SOFR + 1.332% 3.970% VRN 3/05/29		570,000		544,857
4.000% 1/22/25		700,000		690,698
3 mo. USD Term SOFR + 3.412% 4.083% VRN 3/20/51		220,000		180,406
4.200% 8/26/24		380,000		377,714
3 mo. USD Term SOFR + 3.967% 6.250% VRN (d)		170,000		170,193
Bank of Montreal 5 yr. USD Swap + 1.432%
3.803% VRN 12/15/32		70,000		65,300
Bank of Nova Scotia 5 yr. CMT + 2.050%
4.588% VRN 5/04/37		180,000		163,168
BNP Paribas SA
Secured Overnight Financing Rate + 2.074% 2.219% VRN 6/09/26 (b)		200,000		192,301
Secured Overnight Financing Rate + 1.507% 3.052% VRN 1/13/31 (b)		390,000		343,111
4.625% 3/13/27 (b)		260,000		253,675
1 yr. CMT + 1.450% 5.125% VRN 1/13/29 (b)		350,000		349,360
Secured Overnight Financing Rate + 1.866% 5.894% VRN 12/05/34 (b)		200,000		209,118
5 yr. CMT + 4.354% 8.500% VRN (b) (c) (d)		200,000		209,050
BPCE SA
1.000% 1/20/26 (b)		250,000		231,713
Citigroup, Inc.
Secured Overnight Financing Rate + 0.694% 2.014% VRN 1/25/26		95,000		92,111
Secured Overnight Financing Rate + 1.280% 3.070% VRN 2/24/28		845,000		794,825
Secured Overnight Financing Rate + 1.939% 3.785% VRN 3/17/33		580,000		518,082
3 mo. USD Term SOFR + 1.600% 3.980% VRN 3/20/30		760,000		716,084
4.650% 7/30/45		380,000		343,143
3 mo. USD Term SOFR + 4.167% 5.950% VRN (d)		160,000		159,760
Cooperatieve Rabobank UA
1 yr. CMT + 1.220% 3.649% VRN 4/06/28 (b)		250,000		237,986
4.375% 8/04/25		470,000		461,827
Credit Agricole SA Secured Overnight Financing Rate + 1.676%
1.907% VRN 6/16/26 (b)		270,000		258,121
Credit Suisse AG
7.500% 2/15/28		350,000		377,401
7.950% 1/09/25		290,000		294,808
Goldman Sachs Group, Inc.
Secured Overnight Financing Rate + 1.472% 2.908% VRN 7/21/42		240,000		172,567

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.500% 11/16/26	$	270,000	$	259,042
3 mo. USD Term SOFR + 1.563% 4.223% VRN 5/01/29		500,000		481,267
4.250% 10/21/25		200,000		196,241
4.750% 10/21/45		70,000		64,490
5.150% 5/22/45		290,000		280,386
Secured Overnight Financing Rate + 0.820% 6.181% FRN 9/10/27		165,000		165,079
3 mo. USD Term SOFR + 1.432% 6.739% FRN 5/15/26		555,000		559,873
HSBC Holdings PLC
Secured Overnight Financing Rate + 1.929% 2.099% VRN 6/04/26		510,000		489,115
3 mo. USD Term SOFR + 1.642% 6.963% FRN 9/12/26		310,000		313,260
JP Morgan Chase & Co.
Secured Overnight Financing Rate + 1.015% 2.069% VRN 6/01/29		215,000		190,717
Secured Overnight Financing Rate + 2.040% 2.522% VRN 4/22/31		320,000		276,570
3 mo. USD Term SOFR + 1.250% 2.580% VRN 4/22/32		270,000		228,268
Secured Overnight Financing Rate + 0.915% 2.595% VRN 2/24/26		160,000		155,866
Secured Overnight Financing Rate + 1.260% 2.963% VRN 1/25/33		25,000		21,346
Secured Overnight Financing Rate + 2.440% 3.109% VRN 4/22/51		100,000		69,479
3.875% 9/10/24		430,000		426,529
3 mo. USD Term SOFR + 1.592% 4.452% VRN 12/05/29		640,000		623,910
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205%
3.574% VRN 11/07/28		200,000		187,496
Mitsubishi UFJ Financial Group, Inc.
1.412% 7/17/25		235,000		223,487
Morgan Stanley
Secured Overnight Financing Rate + 1.360% 2.484% VRN 9/16/36		520,000		411,260
Secured Overnight Financing Rate + 1.290% 2.943% VRN 1/21/33		115,000		97,741
Secured Overnight Financing Rate + 1.160% 3.620% VRN 4/17/25		150,000		149,832
Secured Overnight Financing Rate + 1.610% 4.210% VRN 4/20/28		205,000		199,205
National Securities Clearing Corp.
1.500% 4/23/25 (b)		250,000		240,830
NatWest Markets PLC
0.800% 8/12/24 (b)		200,000		196,472
PNC Financial Services Group, Inc.
Secured Overnight Financing Rate + 1.841% 5.582% VRN 6/12/29		180,000		182,192
Secured Overnight Financing Rate + 1.322% 5.812% VRN 6/12/26		60,000		60,200
Royal Bank of Canada
1.150% 6/10/25		310,000		295,704
5.150% 2/01/34		100,000		100,096
Santander Holdings USA, Inc. Secured Overnight Financing Rate + 1.249%
2.490% VRN 1/06/28		135,000		122,690
Toronto-Dominion Bank
1.150% 6/12/25		190,000		180,978
Truist Financial Corp. Secured Overnight Financing Rate + 2.050%
6.047% VRN 6/08/27		120,000		121,620
UBS Group AG
Secured Overnight Financing Rate + 2.044% 2.193% VRN 6/05/26 (b)		480,000		460,195
Secured Overnight Financing Rate + 1.730% 3.091% VRN 5/14/32 (b)		640,000		544,364
4.253% 3/23/28 (b)		340,000		327,830
Secured Overnight Financing Rate + 3.920% 6.537% VRN 8/12/33 (b)		300,000		316,287
5 yr. CMT + 4.745% 9.250% VRN (b) (d)		200,000		216,695
US Bancorp
1.450% 5/12/25		210,000		201,327
Secured Overnight Financing Rate + 0.730% 2.215% VRN 1/27/28		20,000		18,448
Secured Overnight Financing Rate + 2.020% 5.775% VRN 6/12/29		140,000		142,443
Secured Overnight Financing Rate + 2.260% 5.836% VRN 6/12/34		40,000		40,770
Wells Fargo & Co.
Secured Overnight Financing Rate + 2.000% 2.188% VRN 4/30/26		200,000		192,606
3 mo. USD Term SOFR + 1.432% 2.879% VRN 10/30/30		235,000		207,739

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 10/23/26	$	430,000	$	407,054
3 mo. USD Term SOFR + 1.432% 3.196% VRN 6/17/27		245,000		233,946
Secured Overnight Financing Rate + 1.500% 3.350% VRN 3/02/33		360,000		312,346
Secured Overnight Financing Rate + 2.130% 4.611% VRN 4/25/53		1,680,000		1,484,450
				24,432,653
Beverages — 0.2%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
3.650% 2/01/26		78,000		76,221
Anheuser-Busch InBev Worldwide, Inc.
3.500% 6/01/30		130,000		121,092
4.600% 4/15/48		65,000		59,399
Constellation Brands, Inc.
4.350% 5/09/27		80,000		78,329
Molson Coors Beverage Co.
3.000% 7/15/26		30,000		28,633
				363,674
Biotechnology — 0.1%
Gilead Sciences, Inc.
3.700% 4/01/24		130,000		130,000
Chemicals — 0.5%
MEGlobal BV
4.250% 11/03/26 (b)		240,000		230,569
OCP SA
3.750% 6/23/31 (b)		260,000		221,260
5.125% 6/23/51 (b)		220,000		165,385
Orbia Advance Corp. SAB de CV
2.875% 5/11/31 (b)		490,000		407,464
				1,024,678
Commercial Services — 0.4%
Cintas Corp. No. 2
3.700% 4/01/27		70,000		68,001
DP World Ltd.
5.625% 9/25/48 (b)		330,000		313,580
Triton Container International Ltd.
1.150% 6/07/24 (b)		90,000		89,194
Triton Container International Ltd./TAL International Container Corp.
3.250% 3/15/32		160,000		129,842
United Rentals North America, Inc.
6.125% 3/15/34 (b)		400,000		400,497
				1,001,114
Cosmetics & Personal Care — 0.2%
Haleon US Capital LLC
3.375% 3/24/29		260,000		241,806
Kenvue, Inc.
4.900% 3/22/33		140,000		139,882
				381,688
Diversified Financial Services — 0.8%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.450% 10/29/26		170,000		157,872

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.000% 10/29/28	$	160,000	$	144,771
3.400% 10/29/33		420,000		353,791
Air Lease Corp.
1.875% 8/15/26		170,000		156,733
5.300% 2/01/28		80,000		80,043
American Express Co.
3.375% 5/03/24		30,000		29,936
4.050% 5/03/29		140,000		135,788
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (b)		140,000		130,015
Charles Schwab Corp.
5.875% 8/24/26		260,000		264,333
Secured Overnight Financing Rate + 2.010% 6.136% VRN 8/24/34		50,000		52,160
CI Financial Corp.
4.100% 6/15/51		115,000		71,835
Mastercard, Inc.
3.850% 3/26/50		50,000		41,373
Nasdaq, Inc.
3.950% 3/07/52		45,000		34,885
Visa, Inc.
4.300% 12/14/45		160,000		144,298
				1,797,833
Electric — 0.3%
Consolidated Edison Co. of New York, Inc.
3.350% 4/01/30		70,000		64,478
3.950% 4/01/50		50,000		40,595
Duke Energy Carolinas LLC
2.850% 3/15/32		35,000		30,019
Duke Energy Corp.
3.950% 8/15/47		65,000		50,246
Duke Energy Ohio, Inc.
3.650% 2/01/29		70,000		66,487
Exelon Corp.
4.100% 3/15/52		65,000		51,708
Monongahela Power Co.
5.400% 12/15/43 (b)		145,000		138,439
Pacific Gas & Electric Co.
2.500% 2/01/31		185,000		153,842
				595,814
Electronics — 0.1%
Honeywell International, Inc.
5.000% 3/01/35		180,000		180,676
Entertainment — 0.2%
Caesars Entertainment, Inc.
7.000% 2/15/30 (b)		30,000		30,794
Warnermedia Holdings, Inc.
3.755% 3/15/27		180,000		171,779
4.279% 3/15/32		170,000		151,851
5.050% 3/15/42		20,000		17,190
6.412% 3/15/26		10,000		10,000
				381,614

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Environmental Controls — 0.1%
Waste Connections, Inc.
5.000% 3/01/34	$	110,000	$	108,939
Food — 0.1%
Mars, Inc.
3.200% 4/01/30 (b)		80,000		72,784
Mondelez International, Inc.
1.500% 5/04/25		220,000		210,938
				283,722
Forest Products & Paper — 0.2%
Suzano Austria GmbH
3.125% 1/15/32		10,000		8,307
3.750% 1/15/31		430,000		380,114
				388,421
Gas — 0.2%
Brooklyn Union Gas Co.
4.487% 3/04/49 (b)		435,000		339,808
East Ohio Gas Co.
3.000% 6/15/50 (b)		45,000		28,466
				368,274
Health Care – Products — 0.3%
Abbott Laboratories
4.750% 11/30/36		10,000		9,918
Medline Borrower LP/Medline Co.-Issuer, Inc.
6.250% 4/01/29 (b)		70,000		70,313
Solventum Corp.
5.400% 3/01/29 (b)		140,000		140,282
5.450% 3/13/31 (b)		140,000		139,638
5.600% 3/23/34 (b)		180,000		180,589
5.900% 4/30/54 (b)		150,000		149,631
				690,371
Health Care – Services — 0.7%
Centene Corp.
2.500% 3/01/31		285,000		234,419
Elevance Health, Inc.
2.375% 1/15/25		100,000		97,546
3.650% 12/01/27		140,000		133,934
HCA, Inc.
4.125% 6/15/29		220,000		208,348
Health Care Service Corp. A Mutual Legal Reserve Co.
3.200% 6/01/50 (b)		145,000		98,236
Humana, Inc.
4.625% 12/01/42		140,000		122,536
UnitedHealth Group, Inc.
1.250% 1/15/26		110,000		103,068
2.300% 5/15/31		220,000		186,373
3.875% 8/15/59		240,000		185,795
4.000% 5/15/29		100,000		96,703

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.200% 5/15/32	$	80,000	$	76,028
				1,542,986
Home Builders — 0.1%
Lennar Corp.
4.500% 4/30/24		100,000		99,885
4.750% 11/29/27		40,000		39,494
				139,379
Insurance — 0.5%
Aon North America, Inc.
5.450% 3/01/34		230,000		232,655
Athene Global Funding Secured Overnight Financing Rate Index + 0.560%
5.916% FRN 8/19/24 (b)		465,000		465,284
Berkshire Hathaway Finance Corp.
2.850% 10/15/50		150,000		101,227
3.850% 3/15/52		90,000		72,753
Principal Life Global Funding II
1.250% 6/23/25 (b)		110,000		104,686
Teachers Insurance & Annuity Association of America
4.900% 9/15/44 (b)		80,000		73,355
				1,049,960
Internet — 0.5%
Amazon.com, Inc.
3.150% 8/22/27		110,000		104,840
3.600% 4/13/32		300,000		279,394
3.875% 8/22/37		50,000		45,137
3.950% 4/13/52		130,000		109,120
Prosus NV
3.061% 7/13/31 (b)		370,000		301,152
3.832% 2/08/51 (b)		210,000		129,254
4.027% 8/03/50 (b)		310,000		197,432
				1,166,329
Iron & Steel — 0.1%
Vale Overseas Ltd.
6.875% 11/21/36		170,000		181,699
Leisure Time — 0.1%
NCL Corp. Ltd.
8.125% 1/15/29 (b)		80,000		84,655
Royal Caribbean Cruises Ltd.
6.250% 3/15/32 (b)		60,000		60,477
				145,132
Lodging — 0.5%
Hilton Domestic Operating Co., Inc.
6.125% 4/01/32 (b)		60,000		60,255
Las Vegas Sands Corp.
3.200% 8/08/24		620,000		613,190
3.900% 8/08/29		40,000		36,405

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Sands China Ltd.
5.125% STEP 8/08/25	$	390,000	$	384,732
				1,094,582
Media — 1.9%
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 1/15/34 (b)		65,000		49,066
4.500% 6/01/33 (b)		810,000		632,708
4.750% 3/01/30 (b)		105,000		90,157
Charter Communications Operating LLC/Charter Communications Operating Capital
3.500% 3/01/42		240,000		160,136
4.200% 3/15/28		450,000		424,138
4.400% 4/01/33 (c)		290,000		257,003
4.908% 7/23/25		240,000		237,079
5.125% 7/01/49		140,000		108,479
5.500% 4/01/63		150,000		117,635
Comcast Corp.
2.887% 11/01/51		550,000		357,018
3.400% 4/01/30		525,000		485,509
3.750% 4/01/40		120,000		99,749
4.150% 10/15/28		270,000		263,521
CSC Holdings LLC
6.500% 2/01/29 (b)		700,000		593,118
DISH DBS Corp.
5.125% 6/01/29		60,000		25,025
5.750% 12/01/28 (b)		70,000		48,108
Fox Corp.
5.476% 1/25/39		90,000		85,651
6.500% 10/13/33		100,000		105,918
				4,140,018
Mining — 0.7%
Anglo American Capital PLC
4.750% 4/10/27 (b)		230,000		225,375
Barrick North America Finance LLC
5.700% 5/30/41		80,000		81,944
5.750% 5/01/43		80,000		82,633
BHP Billiton Finance USA Ltd.
5.000% 9/30/43		100,000		96,277
First Quantum Minerals Ltd.
8.625% 6/01/31 (b)		200,000		194,416
Freeport-McMoRan, Inc.
4.625% 8/01/30		120,000		115,256
5.450% 3/15/43		230,000		220,195
Glencore Funding LLC
1.625% 4/27/26 (b)		120,000		111,269
3.375% 9/23/51 (b)		45,000		30,800
4.000% 3/27/27 (b)		140,000		135,336
Southern Copper Corp.
5.250% 11/08/42		250,000		236,945
				1,530,446
Miscellaneous - Manufacturing — 0.2%
3M Co.
3.050% 4/15/30 (c)		290,000		260,459

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.700% 4/15/50	$	170,000	$	125,572
				386,031
Multi-National — 0.6%
Inter-American Development Bank
7.350% 10/06/30 INR (e)		104,000,000		1,267,141
Oil & Gas — 2.6%
BP Capital Markets America, Inc.
2.939% 6/04/51		50,000		33,381
3.001% 3/17/52		230,000		155,742
3.633% 4/06/30		120,000		113,030
Chesapeake Energy Corp.
5.875% 2/01/29 (b)		100,000		99,178
Continental Resources, Inc.
2.268% 11/15/26 (b)		195,000		179,506
5.750% 1/15/31 (b)		250,000		248,511
Coterra Energy, Inc.
3.900% 5/15/27		230,000		221,371
4.375% 3/15/29		220,000		211,792
Devon Energy Corp.
5.000% 6/15/45		390,000		346,041
5.600% 7/15/41		140,000		134,940
5.850% 12/15/25		120,000		120,651
Diamondback Energy, Inc.
3.500% 12/01/29		160,000		148,006
Ecopetrol SA
5.875% 5/28/45		770,000		575,022
EOG Resources, Inc.
3.900% 4/01/35		200,000		182,107
4.375% 4/15/30		60,000		58,696
4.950% 4/15/50		30,000		28,538
Exxon Mobil Corp.
3.482% 3/19/30		190,000		179,085
4.227% 3/19/40		85,000		77,434
4.327% 3/19/50		20,000		17,698
KazMunayGas National Co. JSC
5.375% 4/24/30 (b) (c)		200,000		196,009
Marathon Petroleum Corp.
5.125% 12/15/26		185,000		185,109
Occidental Petroleum Corp.
6.125% 1/01/31		85,000		88,027
6.450% 9/15/36		50,000		53,313
6.600% 3/15/46 (c)		310,000		334,096
6.625% 9/01/30		60,000		63,582
Petrobras Global Finance BV
5.999% 1/27/28		760,000		765,735
Pioneer Natural Resources Co.
1.900% 8/15/30		170,000		142,808
Reliance Industries Ltd.
3.625% 1/12/52 (b)		330,000		237,856
Shell International Finance BV
2.750% 4/06/30		240,000		215,842
3.250% 4/06/50		280,000		203,264
Southwestern Energy Co.
4.750% 2/01/32		70,000		64,439

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.375% 2/01/29	$	75,000	$	72,843
				5,753,652
Oil & Gas Services — 0.1%
Halliburton Co.
2.920% 3/01/30		105,000		94,157
5.000% 11/15/45		100,000		93,886
				188,043
Pharmaceuticals — 3.1%
AbbVie, Inc.
2.600% 11/21/24		880,000		864,153
2.950% 11/21/26		260,000		247,624
3.200% 11/21/29		600,000		552,898
4.700% 5/14/45		25,000		23,377
4.800% 3/15/29		130,000		130,191
4.950% 3/15/31		60,000		60,428
5.050% 3/15/34		80,000		80,992
Bausch Health Cos., Inc.
6.125% 2/01/27 (b)		50,000		31,155
Becton Dickinson & Co.
3.363% 6/06/24		80,000		79,648
Bristol-Myers Squibb Co.
4.350% 11/15/47		120,000		103,618
5.100% 2/22/31		70,000		70,677
5.200% 2/22/34		210,000		213,218
5.550% 2/22/54		30,000		30,852
5.650% 2/22/64		20,000		20,576
Cigna Group
4.375% 10/15/28		590,000		575,542
4.900% 12/15/48		230,000		209,513
CVS Health Corp.
2.125% 9/15/31		330,000		269,373
4.250% 4/01/50		70,000		56,721
4.300% 3/25/28		580,000		566,008
5.050% 3/25/48		220,000		199,799
Eli Lilly & Co.
4.700% 2/09/34		180,000		178,997
5.000% 2/09/54		20,000		19,887
5.100% 2/09/64		140,000		139,329
Johnson & Johnson
3.625% 3/03/37		160,000		141,988
Merck & Co., Inc.
1.450% 6/24/30		120,000		98,831
Pfizer, Inc.
1.700% 5/28/30 (c)		280,000		235,220
Teva Pharmaceutical Finance Netherlands III BV
3.150% 10/01/26		1,700,000		1,589,315
				6,789,930
Pipelines — 3.6%
Cameron LNG LLC
3.302% 1/15/35 (b)		150,000		124,816
Columbia Pipelines Operating Co. LLC
6.036% 11/15/33 (b)		260,000		269,372
6.544% 11/15/53 (b)		30,000		32,503

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Energy Transfer LP
3.750% 5/15/30	$	230,000	$	211,992
3.900% 7/15/26		710,000		688,483
4.750% 1/15/26		240,000		237,473
5.550% 5/15/34		100,000		100,305
6.250% 4/15/49		320,000		328,427
Enterprise Products Operating LLC
3.700% 1/31/51		140,000		108,164
4.150% 10/16/28		1,030,000		1,001,924
4.850% 1/31/34		220,000		216,704
EQM Midstream Partners LP
4.750% 1/15/31 (b)		140,000		130,194
Kinder Morgan Energy Partners LP
6.950% 1/15/38		125,000		136,784
Kinder Morgan, Inc.
4.300% 3/01/28		110,000		107,351
MPLX LP
4.700% 4/15/48		400,000		341,228
ONEOK, Inc.
5.550% 11/01/26		40,000		40,366
5.800% 11/01/30		70,000		72,113
6.050% 9/01/33		130,000		135,584
6.625% 9/01/53		200,000		220,421
Targa Resources Corp.
4.950% 4/15/52		40,000		35,045
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31		140,000		134,020
Western Midstream Operating LP
3.100% STEP 2/01/25		240,000		234,826
4.050% STEP 2/01/30		900,000		839,724
5.250% STEP 2/01/50		1,610,000		1,440,185
The Williams Cos., Inc.
3.500% 11/15/30		70,000		63,618
3.500% 10/15/51		125,000		88,832
3.750% 6/15/27		250,000		240,579
5.150% 3/15/34		170,000		168,468
				7,749,501
Real Estate Investment Trusts (REITS) — 0.1%
Crown Castle, Inc.
3.300% 7/01/30		35,000		31,104
WEA Finance LLC/Westfield UK & Europe Finance PLC
3.750% 9/17/24 (b)		220,000		217,125
				248,229
Retail — 0.4%
Costco Wholesale Corp.
1.375% 6/20/27		20,000		18,096
1.600% 4/20/30		20,000		16,838
Home Depot, Inc.
2.700% 4/15/30		70,000		62,352
3.300% 4/15/40		120,000		95,395
3.350% 4/15/50		260,000		190,853
Lowe's Cos., Inc.
4.500% 4/15/30		50,000		48,890
McDonald's Corp.
3.500% 7/01/27		300,000		287,587

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.600% 7/01/30	$	90,000	$	83,937
Walmart, Inc.
1.500% 9/22/28		60,000		53,001
1.800% 9/22/31		20,000		16,605
				873,554
Semiconductors — 0.3%
Broadcom, Inc.
3.419% 4/15/33 (b)		296,000		256,602
Intel Corp.
1.600% 8/12/28		120,000		105,301
Micron Technology, Inc.
5.300% 1/15/31		90,000		90,520
5.875% 2/09/33		60,000		62,088
NVIDIA Corp.
3.700% 4/01/60		170,000		135,488
NXP BV/NXP Funding LLC/NXP USA, Inc.
3.875% 6/18/26		85,000		82,512
				732,511
Software — 0.2%
Microsoft Corp.
2.921% 3/17/52		30,000		21,209
Oracle Corp.
1.650% 3/25/26		230,000		214,665
3.850% 4/01/60		250,000		177,930
4.650% 5/06/30		20,000		19,612
				433,416
Telecommunications — 1.7%
AT&T, Inc.
2.750% 6/01/31		160,000		137,818
3.500% 9/15/53		309,000		218,006
3.550% 9/15/55		215,000		150,333
Rogers Communications, Inc.
5.300% 2/15/34		110,000		109,019
T-Mobile USA, Inc.
2.250% 2/15/26		205,000		193,983
2.550% 2/15/31		60,000		51,109
3.375% 4/15/29		50,000		46,242
3.400% 10/15/52		230,000		163,138
3.500% 4/15/25		130,000		127,456
3.500% 4/15/31		700,000		632,154
3.875% 4/15/30		430,000		402,816
5.150% 4/15/34		80,000		79,732
Telefonica Emisiones SA
5.213% 3/08/47		150,000		138,023
Verizon Communications, Inc.
2.650% 11/20/40		15,000		10,570
3.850% 11/01/42		430,000		353,598
3.875% 2/08/29		550,000		526,552
3.875% 3/01/52		435,000		341,923
				3,682,472
Transportation — 0.2%
Union Pacific Corp.

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2.150% 2/05/27	$	50,000	$	46,491
2.891% 4/06/36		270,000		220,209
3.750% 2/05/70		150,000		110,276
3.839% 3/20/60		120,000		92,137
				469,113

TOTAL CORPORATE DEBT (Cost $83,069,524)				79,068,153

NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 13.7%
Automobile Asset-Backed Securities — 0.5%
Avis Budget Rental Car Funding AESOP LLC
Series 2024-3A, Class A, 5.230% 12/20/30 (b)		520,000		518,837
Series 2024-1A, Class A, 5.360% 6/20/30 (b)		430,000		432,162
				950,999
Commercial Mortgage-Backed Securities — 5.3%
Bank
Series 2020-BN28, Class AS, 2.140% 3/15/63		380,000		312,220
Series 2022-BNK39, Class AS, 3.181% 2/15/55		302,000		259,606
Series 2017-BNK8, Class A3, 3.229% 11/15/50		266,465		249,986
Benchmark Mortgage Trust
Series 2020-B19, Class AS, 2.148% 9/15/53		380,000		300,009
Series 2020-B18, Class AGNF, 4.139% 7/15/53 (b)		378,000		345,341
BPR Trust
Series 2021-TY, Class A, 1 mo. USD Term SOFR + 1.164% 6.491% FRN 9/15/38 (b)		550,000		546,564
Series 2022-OANA, Class A, 1 mo. USD Term SOFR + 1.898% 7.223% FRN 4/15/37 (b)		460,000		462,300
BX Commercial Mortgage Trust
Series 2024-XL5, Class A, 1 mo. USD Term SOFR + 1.392% 6.692% FRN 3/15/41 (b)		170,000		170,000
Series 2023-XL3, Class A, 1 mo. USD Term SOFR + 1.761% 7.087% FRN 12/09/40 (b)		220,000		221,237
Series 2021-VOLT, Class F, 1 mo. USD Term SOFR + 2.514% 7.840% FRN 9/15/36 (b)		405,000		407,784
Series 2021-21M, Class H, 1 mo. USD Term SOFR + 4.124% 9.450% FRN 10/15/36 (b)		277,200		261,515
BX Trust
Series 2019-OC11, Class E, 3.944% VRN 12/09/41 (b) (f)		374,000		320,999
Series 2023-DELC, Class A, 1 mo. USD Term SOFR + 2.690% 8.015% FRN 5/15/38 (b)		440,000		445,499
CD Mortgage Trust, Series 2017-CD3, Class A4
3.631% 2/10/50		120,000		110,932
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA,
0.980% VRN 1/10/48 (f)		5,132,198		67,379
Citigroup Commercial Mortgage Trust
Series 2019-GC41, Class B, 3.199% 8/10/56		163,000		137,128
Series 2020-420K, Class D, 3.312% VRN 11/10/42 (b) (f)		200,000		165,080
Series 2020-420K, Class E, 3.312% VRN 11/10/42 (b) (f)		200,000		159,561
Series 2017-C4, Class B, 4.096% VRN 10/12/50 (f)		340,000		308,331
CSAIL Commercial Mortgage Trust
Series 2015-C1, Class XA, 0.803% VRN 4/15/50 (f)		7,523,228		21,589
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		282,456
CSMC Trust, Series 2021-B33, Class B,
3.645% VRN 10/10/43 (b) (f)		300,000		255,108

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
DTP Commercial Mortgage Trust, Series 2023-STE2, Class A,
5.649% VRN 1/15/41 (b) (f)	$	220,000	$	220,077
GS Mortgage Securities Corp. II, Series 2024-70P, Class E,
8.666% VRN 3/10/41 (b) (f)		250,000		252,896
GS Mortgage Securities Corp. Trust, Series 2018-RIVR, Class C, 1 mo. USD Term SOFR + 1.547%
6.872% FRN 7/15/35 (b)		167,000		97,177
GS Mortgage Securities Trust
Series 2015-GS1, Class XA, 0.755% VRN 11/10/48 (f)		7,439,194		70,489
Series 2014-GC26, Class D, 4.509% VRN 11/10/47 (b) (f)		763,000		530,737
HPLY Trust, Series 2019-HIT, Class F, 1 mo. USD Term SOFR + 3.264%
8.586% FRN 11/15/36 (b)		377,250		368,910
JP Morgan Chase Commercial Mortgage Securities Trust
Series 2015-JP1, Class XA, 0.882% VRN 1/15/49 (f)		3,228,230		47,723
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		149,994
JPMBB Commercial Mortgage Securities Trust
Series 2015-C30, Class XA, 0.419% VRN 7/15/48 (f)		7,606,059		31,622
Series 2015-C29, Class XA, 0.541% VRN 5/15/48 (f)		5,247,293		22,388
Series 2014-C25, Class XA, 0.794% VRN 11/15/47 (f)		3,478,559		6,572
Series 2015-C28, Class XA, 0.913% VRN 10/15/48 (f)		5,649,870		31,911
Series 2014-C23, Class D, 3.980% VRN 9/15/47 (b) (f)		391,000		346,445
Med Trust, Series 2021-MDLN, Class D, 1 mo. USD Term SOFR + 2.114%
7.440% FRN 11/15/38 (b)		394,109		392,631
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2016-C30, Class A4
2.600% 9/15/49		108,055		102,056
Morgan Stanley Capital I Trust, Series 2015-UBS8, Class XA,
0.831% VRN 12/15/48 (f)		5,402,691		53,517
MSWF Commercial Mortgage Trust
Series 2023-1, Class A4, 5.472% 5/15/56		250,000		255,805
Series 2023-2, Class A5, 6.014% VRN 12/15/56 (f)		250,000		267,697
MTN Commercial Mortgage Trust, Series 2022-LPFL, Class A, 1 mo. USD Term SOFR + 1.397%
6.727% FRN 3/15/39 (b)		540,000		532,069
NJ Trust, Series 2023-GSP, Class A,
6.481% VRN 1/06/29 (b) (f)		200,000		208,617
NRTH Mortgage Trust, Series 2024-PARK, Class A, 1 mo. USD Term SOFR + 1.641%
6.941% FRN 3/15/41 (b)		250,000		250,313
SG Commercial Mortgage Securities Trust, Series 2016-C5, Class XA,
1.851% VRN 10/10/48 (f)		3,046,959		84,843
SLG Office Trust, Series 2021-OVA, Class E
2.851% 7/15/41 (b)		260,000		197,055
TTAN, Series 2021-MHC, Class F, 1 mo. USD Term SOFR + 3.014%
8.341% FRN 3/15/38 (b)		323,232		311,404
Wells Fargo Commercial Mortgage Trust
Series 2015-NXS2, Class XA, 0.580% VRN 7/15/58 (f)		8,829,548		44,992
Series 2015-P2, Class XA, 0.923% VRN 12/15/48 (f)		3,408,472		38,185
Series 2019-C53, Class XA, 0.986% VRN 10/15/52 (f)		4,212,151		166,205
Series 2017-C38, Class A4, 3.190% 7/15/50		293,994		274,193
Series 2016-C35, Class B, 3.438% 7/15/48		328,000		306,406
				11,473,553
Home Equity Asset-Backed Securities — 0.0%
Washington Mutual Asset-Backed Certificates Trust, Series 2006-HE5, Class 2A2, 1 mo. USD Term SOFR + 0.474%
4.485% FRN 10/25/36		53,073		17,662

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Other Asset-Backed Securities — 3.4%
AB BSL CLO 4 Ltd., Series 2023-4A, Class A, 3 mo. USD Term SOFR + 2.000%
7.318% FRN 4/20/36 (b)	$	200,000	$	201,564
AMMC CLO 23 Ltd., Series 2020-23A, Class A1R, 3 mo. USD Term SOFR + 1.302%
6.618% FRN 10/17/31 (b)		150,000		150,072
ARES Loan Funding IV Ltd., Series 2023-ALF4A, Class A1, 3 mo. USD Term SOFR + 1.750%
7.097% FRN 10/15/36 (b)		450,000		453,101
Birch Grove CLO 7 Ltd., Series 2023-7A, Class A1, 3 mo. USD Term SOFR + 1.800%
7.178% FRN 10/20/36 (b)		200,000		201,450
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B,
5.682% STEP 12/16/41 (b)		530,935		516,334
Cayuga Park CLO Ltd., Series 2020-1A, Class AR, 3 mo. USD Term SOFR + 1.382%
6.698% FRN 7/17/34 (b)		200,000		200,095
CLI Funding VI LLC, Series 2020-3A, Class A
2.070% 10/18/45 (b)		153,750		138,901
Dividend Solar Loans LLC, Series 2018-1, Class B
4.290% 7/20/38 (b)		471,336		418,961
Dryden 55 CLO Ltd., Series 2018-55A, Class A1, 3 mo. USD Term SOFR + 1.282%
6.596% FRN 4/15/31 (b)		252,824		252,976
Elmwood CLO I Ltd., Series 2019-1A, Class A1RR, 3 mo. USD Term SOFR + 1.520%
6.831% FRN 4/20/37 (b)		100,000		100,241
Empower CLO Ltd., Series 2023-2A, Class A1, 3 mo. USD Term SOFR + 2.200%
7.514% FRN 7/15/36 (b)		270,000		273,642
Hero Funding Trust, Series 2016-4A, Class A2
4.290% 9/20/47 (b)		85,339		77,866
HPS Loan Management Ltd., Series 15A-19, Class A1R, 3 mo. USD Term SOFR + 1.320%
6.638% FRN 1/22/35 (b)		250,000		249,893
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (b)		272,815		246,631
Mosaic Solar Loan Trust, Series 2020-2A, Class B
2.210% 8/20/46 (b)		240,812		200,632
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (b)		169,576		162,809
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class ARR, 3 mo. USD Term SOFR + 1.422%
6.736% FRN 7/15/34 (b)		250,000		250,153
Neuberger Berman Loan Advisers CLO 29 Ltd., Series 2018-29A, Class A1, 3 mo. USD Term SOFR + 1.392%
6.701% FRN 10/19/31 (b)		256,834		256,643
Octagon 66 Ltd., Series 2022-1A, Class A1R, 3 mo. USD Term SOFR + 1.750%
7.076% FRN 11/16/36 (b)		250,000		251,512
Rad CLO 22 Ltd., Series 2023-22A, Class A1, 3 mo. USD Term SOFR + 1.830%
7.202% FRN 1/20/37 (b)		400,000		402,995
Storm King Park CLO Ltd., Series 2022-1A, Class A1, 3 mo. USD Term SOFR + 2.050%
7.364% FRN 10/15/35 (b)		250,000		251,377

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Sunnova Helios IV Issuer LLC, Series 2020-AA, Class A
2.980% 6/20/47 (b)	$	345,130	$	319,239
Sunnova Helios VII Issuer LLC, Series 2021-C, Class C
2.630% 10/20/48 (b)		424,240		326,918
Symphony CLO 40 Ltd., Series 2023-40A, Class A1, 3 mo. USD Term SOFR + 1.640%
6.984% FRN 1/14/34 (b)		380,000		380,202
Textainer Marine Containers VII Ltd., Series 2020-2A, Class A
2.100% 9/20/45 (b)		330,328		298,966
Vault DI Issuer LLC, Series 2021-1A, Class A2
2.804% 7/15/46 (b)		500,000		435,262
Venture 41 CLO Ltd., Series 2021-41A, Class A1N, 3 mo. USD Term SOFR + 1.592%
6.909% FRN 1/20/34 (b)		250,000		249,991
Whitebox CLO II Ltd., Series 2020-2A, Class A1R, 3 mo. USD Term SOFR + 1.482%
6.800% FRN 10/24/34 (b)		150,000		149,948
				7,418,374
Student Loans Asset-Backed Securities — 0.7%
College Avenue Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD Term SOFR + 1.314%
6.644% FRN 12/26/47 (b)		174,252		172,719
ELFI Graduate Loan Program LLC, Series 2020-A, Class A
1.730% 8/25/45 (b)		265,351		231,305
SMB Private Education Loan Trust, Series 2024-A, Class A1A
5.240% 3/15/56 (b)		290,000		290,130
SoFi Professional Loan Program LLC
Series 2017-D, Class BFX, 3.610% 9/25/40 (b)		350,000		315,287
Series 2018-B, Class BFX, 3.830% 8/25/47 (b)		500,000		453,971
				1,463,412
Whole Loan Collateral Collateralized Mortgage Obligations — 3.5%
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A,
4.907% VRN 4/25/37 (f)		469,379		423,687
Countrywide Home Loans Mortgage Pass-Through Trust
Series 2007-HYB2, Class 3A1, 4.325% VRN 2/25/47 (f)		660,845		587,163
Series 2007-3, Class A21, 6.000% 4/25/37		1,283,698		620,334
Series 2007-14, Class A6, 6.000% 9/25/37		1,122,119		584,970
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD Term SOFR + 0.454%
5.781% FRN 12/19/36		360,391		315,796
Imperial Fund Mortgage Trust, Series 2021-NQM2, Class M1,
2.489% VRN 9/25/56 (b) (f)		1,028,000		654,700
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1,
3.464% VRN 7/25/35 (f)		218,286		190,717
New Residential Mortgage Loan Trust, Series 2022-NQM4, Class A1,
5.000% STEP 6/25/62 (b)		438,991		440,018
PRKCM Trust, Series 2023-AFC1, Class A1,
6.598% STEP 2/25/58 (b)		372,834		375,359
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3,
6.500% VRN 10/26/37 (b) (f)		623,676		260,546
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD Term SOFR + 0.714%
6.000% FRN 4/25/37		141,787		113,982
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2,
4.664% VRN 10/25/37 (f)		502,082		397,306
Verus Securitization Trust

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-4, Class M1, 2.195% VRN 7/25/66 (b) (f)	$	1,000,000	$	607,290
Series 2021-R1, Class M1, 2.338% 10/25/63 (b)		1,500,000		1,296,954
Series 2022-6, Class A1, 4.910% STEP 6/25/67 (b)		249,014		248,423
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5,
6.850% STEP 5/25/36		596,681		499,109
				7,616,354
Whole Loan Collateral Planned Amortization Classes — 0.3%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15
6.000% 8/25/36		1,245,727		698,359

TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $37,406,042)				29,638,713

SOVEREIGN DEBT OBLIGATIONS — 6.3%
Brazil Notas do Tesouro Nacional Serie F
10.000% 1/01/27 BRL (e)		2,920,000		579,723
10.000% 1/01/33 BRL (e)		3,249,000		615,848
Brazilian Government International Bond
3.750% 9/12/31		950,000		829,319
5.625% 2/21/47 (c)		300,000		257,239
Colombia Government International Bond
3.250% 4/22/32		230,000		178,923
4.125% 2/22/42		440,000		296,897
Indonesia Government International Bond
3.500% 1/11/28		320,000		303,498
Israel Government International Bond
2.750% 7/03/30		310,000		266,767
Jamaica Government International Bond
9.625% 11/03/30		22,000,000		151,343
Mexican Bonos
7.750% 11/23/34 MXN (e)		8,220,000		442,098
7.750% 11/13/42 MXN (e)		152,850,000		7,805,100
Mexico Government International Bond
2.659% 5/24/31		200,000		166,842
3.750% 1/11/28		205,000		194,635
4.280% 8/14/41		450,000		360,847
Nigeria Government International Bond
7.143% 2/23/30 (b)		210,000		190,470
Peruvian Government International Bond
6.550% 3/14/37		260,000		282,100
Provincia de Buenos Aires/Government Bond,
6.375% STEP 9/01/37 (b)		530,118		215,998
Republic of Kenya Government International Bond
6.300% 1/23/34 (b)		370,000		301,637
Uruguay Government International Bond
3.875% 7/02/40		4,921,984		141,045
				13,580,329

TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $12,462,247)				13,580,329

U.S. Government Agency Obligations and Instrumentalities (g) — 34.3%
Collateralized Mortgage Obligations — 4.1%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series K-157, Class X1, 0.254% VRN 5/25/33 (f)	$	10,399,523	$	233,543
Series K-154, Class X1, 0.353% VRN 1/25/33 (f)		6,798,273		190,998
Series K124, Class X1, 0.718% VRN 12/25/30 (f)		5,869,407		223,008
Federal Home Loan Mortgage Corp. REMICS
Series 5092, Class AP, 2.000% 4/25/41		76,719		66,073
Series 4991, Class QV, 2.000% 9/25/45		92,218		75,019
Series 5085, Class NI, 2.000% 3/25/51		1,327,136		165,345
Series 5274, Class IO, 2.500% 1/25/51		643,451		105,511
Series 5071, Class IH, 2.500% 2/25/51		242,636		31,363
Series 4481, Class B, 3.000% 12/15/42		855,500		811,521
Series 4483, Class CA, 3.000% 6/15/44		1,451,959		1,345,790
Series 4391, Class MZ, 3.000% 9/15/44		132,929		113,117
Federal National Mortgage Association REMICS
Series 2018-21, Class PO, 0.000% 4/25/48		609,319		441,789
Series 2021-48, Class NS, 30 day USD SOFR Average + 3.650% 0.000% FRN 8/25/51		998,460		27,864
Series 2021-65, Class JA, 2.000% 1/25/46		71,568		61,682
Series 2020-57, Class TA, 2.000% 4/25/50		240,767		203,190
Series 2020-56, Class AQ, 2.000% 8/25/50		300,000		227,342
Series 2014-6, Class Z, 2.500% 2/25/44		128,905		108,419
Series 2012-118, Class VZ, 3.000% 11/25/42		126,519		111,987
Series 2021-18, Class ZG, 3.000% 6/25/50		2,633,382		1,724,236
Series 2020-96, Class IN, 3.000% 1/25/51		384,108		65,838
Series 2015-65, Class CZ, 3.500% 9/25/45		134,983		113,439
Government National Mortgage Association
Series 2022-210, Class IO, 0.697% VRN 7/16/64 (f)		1,478,496		94,961
Series 2022-216, Class IO, 0.750% VRN 7/16/65 (f)		1,485,914		91,278
Series 2020-103, Class AD, 1.450% 1/16/63		289,168		210,262
Series 2022-3, Class B, 1.850% 2/16/61		500,000		257,802
Series 2020-175, Class GI, 2.000% 11/20/50		141,543		15,469
Series 2022-113, Class Z, 2.000% 9/16/61		1,242,707		630,628
Series 2023-92, Class AH, 2.000% 6/16/64		99,984		75,234
Series 2022-220, Class E, 3.000% VRN 10/16/64 (f)		100,000		74,607
Government National Mortgage Association REMICS
Series 2021-103, Class SA, 30 day USD SOFR Average + 3.250% 0.000%FRN 4/20/51		1,131,058		17,033
Series 2021-115, Class MI, 2.500% 5/20/51		450,702		48,654
Series 2021-96, Class VI, 2.500% 6/20/51		416,113		57,140
Series 2022-189, Class PT, 2.500% 10/20/51		92,038		76,158
Series 2021-176, Class IN, 2.500% 10/20/51		497,380		69,018
Series 2022-99, Class JW, 2.500% 1/20/52		100,000		78,447
Series 2021-57, Class BI, 3.000% 3/20/51		617,408		96,467
Series 2021-98, Class IG, 3.000% 6/20/51		906,064		146,719
Series 2021-137, Class IQ, 3.000% 8/20/51		1,226,342		193,787
Series 2021-117, Class ID, 3.500% 6/20/51		681,972		116,060
Series 2020-H20, Class FA, 1 mo. USD Term SOFR + 0.464% 5.794% FRN 4/20/70		170,361		165,857
				8,962,655
Pass-Through Securities — 29.0%
Federal Home Loan Mortgage Corp.
Pool #RB5084 1.500% 11/01/40		430,370		353,843
Pool #RB5110 1.500% 5/01/41		478,198		389,131
Pool #RB5117 1.500% 7/01/41		406,825		331,052
Pool #RA4537 1.500% 2/01/51		80,888		61,348
Pool #RB5131 2.000% 10/01/41		572,916		479,313
Pool #RB5138 2.000% 12/01/41		416,492		348,446
Pool #RB0714 2.000% 12/01/41		84,129		70,647

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SC0313 2.000% 1/01/42	$	449,233	$	375,277
Pool #RB5145 2.000% 2/01/42		684,892		572,140
Pool #QK1354 2.000% 2/01/42		85,249		71,214
Pool #SC0384 2.000% 4/01/42		280,892		235,615
Pool #RB5153 2.000% 4/01/42		784,735		654,319
Pool #SC0319 2.000% 4/01/42		89,397		74,791
Pool #QB3535 2.000% 9/01/50		502,336		400,015
Pool #QB4985 2.000% 11/01/50		71,798		57,578
Pool #SD0715 2.000% 9/01/51		1,725,761		1,392,036
Pool #QD3960 2.000% 1/01/52		350,891		280,295
Pool #RB5149 2.500% 3/01/42		85,572		74,067
Pool #QK1449 2.500% 4/01/42		171,965		148,844
Pool #G08520 2.500% 1/01/43		457,354		401,517
Pool #SD7521 2.500% 7/01/50		191,672		161,919
Pool #SD7525 2.500% 10/01/50		601,059		507,568
Pool #RA3913 2.500% 11/01/50		221,712		187,226
Pool #RA4142 2.500% 12/01/50		278,064		234,813
Pool #SD7534 2.500% 2/01/51		141,427		119,915
Pool #QC7086 2.500% 9/01/51		246,277		204,969
Pool #SD2991 2.500% 9/01/51		92,890		78,209
Pool #SD0777 2.500% 11/01/51		84,090		70,247
Pool #SD0857 2.500% 1/01/52		438,394		366,095
Pool #SD7554 2.500% 4/01/52		1,041,294		874,121
Pool #SD1749 2.500% 4/01/52		90,168		75,466
Pool #841703 1 yr. USD RFUCCT + 1.634% 2.635% FRN 12/01/50 (h)		296,936		272,467
Pool #QK1512 3.000% 5/01/42		159,751		142,149
Pool #RA2797 3.000% 6/01/50		53,802		46,579
Pool #QC3242 3.000% 6/01/51		433,327		378,268
Pool #SD8174 3.000% 10/01/51		1,308,368		1,131,086
Pool #SD0781 3.000% 11/01/51		77,877		67,398
Pool #QD6216 3.000% 2/01/52		82,671		71,779
Pool #QD7333 3.000% 2/01/52		90,387		78,478
Pool #G08632 3.500% 3/01/45		591,384		542,787
Pool #SD1549 3.500% 4/01/52		89,407		80,301
Pool #SD1936 3.500% 6/01/52		18,354		16,478
Pool #SD1218 4.000% 7/01/49		310,082		291,875
Pool #SD2866 4.000% 7/01/49		93,095		87,483
Pool #RA7185 4.000% 4/01/52		344,933		322,281
Pool #RA7186 4.000% 4/01/52		170,407		159,376
Pool #SD7560 4.000% 2/01/53		184,114		172,714
Pool #SD2792 4.500% 3/01/47		87,743		85,814
Pool #SD1143 4.500% 9/01/50		1,119,502		1,080,953
Pool #SD0615 4.500% 1/01/51		82,340		79,736
Pool #SD1807 4.500% 7/01/52		91,820		88,170
Pool #SD1775 4.500% 11/01/52		184,201		176,822
Pool #SD2394 4.500% 11/01/52		91,951		87,664
Pool #SD2355 4.500% 12/01/52		92,349		88,044
Pool #SD1305 5.000% 7/01/52		613,806		602,270
Pool #QF5465 5.000% 12/01/52		91,657		89,783
Pool #SD2374 5.000% 1/01/53		92,709		90,813
Pool #SD2591 5.000% 3/01/53		92,809		91,354
Pool #RA8790 5.000% 4/01/53		194,105		189,790
Pool #RA8694 5.000% 4/01/53		188,949		186,343
Pool #SD3722 5.000% 5/01/53		93,742		92,303
Pool #SD2245 5.500% 12/01/52		93,020		92,941
Pool #SD2138 5.500% 1/01/53		95,309		95,317
Pool #SD2723 5.500% 3/01/53		93,221		93,259
Pool #SD2688 5.500% 4/01/53		93,975		94,072

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SD2511 5.500% 4/01/53	$	93,686	$	93,476
Pool #QF9985 5.500% 4/01/53		94,907		94,610
Pool #QG1295 5.500% 4/01/53		95,619		95,442
Pool #SD2762 5.500% 5/01/53		95,670		95,768
Pool #SD2756 5.500% 5/01/53		92,252		92,189
Pool #SD2892 5.500% 5/01/53		93,114		93,210
Pool #RA9437 5.500% 7/01/53		96,617		96,536
Pool #QG7311 5.500% 7/01/53		96,418		96,472
Pool #SD3475 5.500% 8/01/53		95,120		94,980
Pool #SD2284 6.000% 12/01/52		89,033		90,537
Pool #SD2578 6.000% 3/01/53		183,239		185,876
Pool #SD3432 6.000% 7/01/53		93,611		95,145
Pool #SD3642 6.000% 9/01/53		96,214		98,471
Pool #SD3737 6.000% 9/01/53		98,615		100,034
Pool #SD2452 6.500% 2/01/53		90,066		92,793
Pool #RA8904 6.500% 4/01/53		171,611		176,807
Pool #RA9081 6.500% 5/01/53		91,853		94,778
Federal National Mortgage Association
Pool #MA4519 1.500% 1/01/42		86,014		69,671
Pool #MA4236 1.500% 1/01/51		80,751		61,017
Pool #MA4280 1.500% 3/01/51		16,459		12,421
Pool #FP0028 2.000% 8/01/40		93,388		78,889
Pool #MA4422 2.000% 9/01/41		802,321		672,994
Pool #MA4446 2.000% 10/01/41		242,492		202,874
Pool #MA4474 2.000% 11/01/41		164,618		137,723
Pool #MA4501 2.000% 12/01/41		83,749		70,066
Pool #MA4540 2.000% 2/01/42		84,948		70,963
Pool #MA4606 2.000% 5/01/42		265,752		221,586
Pool #BQ3331 2.000% 8/01/50		75,000		59,723
Pool #CA7023 2.000% 9/01/50		71,707		57,414
Pool #CA7224 2.000% 10/01/50		142,991		114,491
Pool #BQ4926 2.000% 10/01/50		71,555		56,980
Pool #MA4237 2.000% 1/01/51		224,752		178,691
Pool #FS4654 2.000% 7/01/51		188,435		150,053
Pool #FS4270 2.000% 3/01/52		93,650		75,013
Pool #BS4941 2.460% 4/01/32		978,200		831,211
Pool #MA4177 2.500% 11/01/40		57,153		50,076
Pool #FS0697 2.500% 2/01/42		81,734		71,766
Pool #MA4571 2.500% 3/01/42		84,422		73,071
Pool #BV7697 2.500% 4/01/42		355,874		308,027
Pool #MA4587 2.500% 4/01/42		173,736		150,377
Pool #MA4607 2.500% 5/01/42		87,154		75,436
Pool #FM4052 2.500% 9/01/50		2,355,919		1,989,471
Pool #FM7673 2.500% 6/01/51		309,242		258,822
Pool #FS0028 2.500% 9/01/51		84,051		70,584
Pool #FM8786 2.500% 10/01/51		81,573		68,502
Pool #BU3295 2.500% 10/01/51		168,358		139,803
Pool #FS0549 2.500% 2/01/52		263,255		220,086
Pool #FS3368 2.500% 3/01/52		91,023		76,012
Pool #FS2595 2.500% 3/01/52		180,647		150,968
Pool #FS1626 2.500% 4/01/52		175,737		146,645
Pool #BF0546 2.500% 7/01/61		586,332		469,572
Pool #BF0560 2.500% 9/01/61		86,778		69,497
Pool #FS1542 3.000% 4/01/42		166,435		148,669
Pool #CB3542 3.000% 5/01/42		87,167		77,781
Pool #MA4643 3.000% 5/01/42		87,660		78,001
Pool #MA4632 3.000% 6/01/42		354,843		315,744
Pool #MA2248 3.000% 4/01/45		269,920		235,708

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #AS7661 3.000% 8/01/46	$	265,043	$	231,449
Pool #FM9934 3.000% 12/01/48		824,948		728,378
Pool #FM9564 3.000% 2/01/50		959,571		846,342
Pool #CA7531 3.000% 10/01/50		70,882		62,075
Pool #FM8480 3.000% 11/01/50		60,320		52,655
Pool #FM9464 3.000% 11/01/51		159,880		139,666
Pool #BU1421 3.000% 1/01/52		87,130		75,951
Pool #FS2463 3.000% 2/01/52		536,007		465,389
Pool #FS1289 3.000% 3/01/52		415,585		364,858
Pool #CB3833 3.000% 6/01/52		90,133		78,195
Pool #CB3386 3.500% 4/01/42		86,876		80,071
Pool #MA3210 3.500% 12/01/47		175,557		159,775
Pool #FM7100 3.500% 6/01/50		108,262		98,529
Pool #FS1240 3.500% 12/01/51		82,780		74,609
Pool #FS1237 3.500% 12/01/51		240,806		218,386
Pool #FS1241 3.500% 1/01/52		88,639		79,888
Pool #FS1462 3.500% 1/01/52		167,825		152,147
Pool #FS2296 3.500% 1/01/52		417,119		375,677
Pool #FS1092 3.500% 4/01/52		512,902		461,940
Pool #FS1454 3.500% 4/01/52		172,700		155,642
Pool #FS1555 3.500% 4/01/52		174,284		157,349
Pool #CB3282 3.500% 4/01/52		172,080		154,554
Pool #BV8546 3.500% 5/01/52		168,263		152,229
Pool #FS1556 3.500% 5/01/52		701,147		634,554
Pool #FS1866 3.500% 5/01/52		92,225		83,063
Pool #FS3339 3.500% 6/01/52		271,416		243,687
Pool #FM3049 4.000% 4/01/44		195,994		186,925
Pool #AX2501 4.000% 10/01/44		549,176		520,192
Pool #CA2472 4.000% 10/01/48		55,979		52,395
Pool #CB3272 4.000% 4/01/52		172,570		161,399
Pool #CB3320 4.000% 4/01/52		354,582		331,297
Pool #CB3614 4.000% 5/01/52		86,844		81,223
Pool #FS2023 4.000% 5/01/52		182,040		170,200
Pool #FS2442 4.000% 7/01/52		18,175		16,970
Pool #FM1263 4.500% 7/01/49		38,701		37,477
Pool #FS4480 4.500% 3/01/50		88,564		86,373
Pool #MA4031 4.500% 5/01/50		21,879		21,079
Pool #FS0067 4.500% 9/01/51		66,847		64,566
Pool #FS2914 4.500% 9/01/52		90,762		87,268
Pool #BX2186 4.500% 11/01/52		76,077		72,506
Pool #FS3977 4.500% 11/01/52		46,432		44,268
Pool #FS3836 4.500% 1/01/53		92,622		88,304
Pool #CB5892 4.500% 3/01/53		94,500		90,065
Pool #CB3880 5.000% 6/01/52		83,963		82,858
Pool #BW0048 5.000% 7/01/52		83,124		81,610
Pool #CB4103 5.000% 7/01/52		172,131		171,263
Pool #BW9916 5.000% 10/01/52		92,362		90,211
Pool #FS3249 5.000% 11/01/52		87,070		85,080
Pool #FS3941 5.000% 2/01/53		93,657		91,768
Pool #FS5708 5.000% 6/01/53		95,744		94,393
Pool #FS5155 5.000% 7/01/53		186,848		185,555
Pool #CB5108 5.500% 11/01/52		184,725		184,742
Pool #FS3672 5.500% 2/01/53		95,342		95,828
Pool #FS4166 5.500% 4/01/53		93,648		93,452
Pool #CB6322 5.500% 5/01/53		94,383		94,421
Pool #FS4805 5.500% 5/01/53		96,455		96,578
Pool #FS4979 5.500% 5/01/53		92,744		92,419
Pool #FS5647 5.500% 7/01/53		95,456		95,450

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #CB7109 5.500% 9/01/53	$	380,891	$	380,332
Pool #CB7114 5.500% 9/01/53		387,522		386,105
Pool #CB5316 6.000% 12/01/52		174,558		177,288
Pool #FS4454 6.000% 4/01/53		91,152		92,281
Pool #FS4573 6.000% 5/01/53		185,986		188,721
Pool #FS5306 6.000% 7/01/53		94,276		96,782
Pool #CB6753 6.000% 7/01/53		282,889		287,137
Pool #FS6242 6.000% 11/01/53		97,662		99,159
Pool #CB5497 6.500% 1/01/53		265,648		274,107
Pool #BX7702 6.500% 2/01/53		83,625		86,157
Pool #FS7624 6.500% 3/01/54 (h)		100,000		102,903
Government National Mortgage Association II
Pool #MA6930 2.000% 10/20/50 (h)		517,436		424,262
Pool #MA7135 2.000% 1/20/51		137,403		112,618
Pool #BS8546 2.500% 12/20/50		69,535		58,269
Pool #MA7312 2.500% 4/20/51 (h)		342,148		291,525
Pool #785565 2.500% 6/20/51		79,949		67,245
Pool #785568 2.500% 8/20/51		79,332		66,727
Pool #785662 2.500% 10/20/51		2,183,392		1,818,726
Pool #785657 2.500% 10/20/51		164,287		138,183
Pool #785663 2.500% 10/20/51		80,989		68,120
Pool #785667 2.500% 10/20/51		82,601		69,477
Pool #785764 2.500% 11/20/51		617,461		519,350
Pool #785762 2.500% 11/20/51		84,954		71,455
Pool #785789 2.500% 12/20/51		82,662		69,528
Pool #785821 2.500% 12/20/51		85,727		72,105
Pool #MA7368 3.000% 5/20/51		190,054		167,949
Pool #MA7590 3.000% 9/20/51		1,415,700		1,249,719
Pool #MA7650 3.000% 10/20/51		232,301		205,138
Pool #786150 3.000% 3/20/52		88,176		77,067
Pool #786583 3.000% 3/20/52		187,366		163,993
Pool #786843 3.000% 3/20/52		189,566		165,860
Pool #MA5594 3.500% 11/20/48		155,263		142,592
Pool #MA6711 3.500% 6/20/50		266,178		243,956
Pool #MA6997 3.500% 11/20/50		324,319		297,040
Pool #MA7883 3.500% 2/20/52		602,507		548,770
Pool #786216 3.500% 6/20/52		178,956		160,772
Pool #MA5078 4.000% 3/20/48		167,274		158,228
Pool #MA5763 4.000% 2/20/49		145,641		137,673
Pool #MA5817 4.000% 3/20/49		60,673		57,353
Pool #MA5876 4.000% 4/20/49		48,419		45,770
Pool #MA8045 4.000% 5/20/52		179,785		168,404
Pool #CK9592 4.000% 6/20/52		88,460		82,653
Pool #786429 4.000% 6/20/52		91,583		85,972
Pool #MA5193 4.500% 5/20/48		26,823		26,117
Pool #MA5265 4.500% 6/20/48		180,449		175,587
Pool #MA5399 4.500% 8/20/48		67,643		65,778
Pool #MA5652 4.500% 12/20/48		32,434		31,499
Pool #MA5711 4.500% 1/20/49		535,920		520,308
Pool #MA5764 4.500% 2/20/49		87,659		85,105
Pool #MA5818 4.500% 3/20/49		144,474		140,265
Pool #786366 4.500% 8/20/52		182,872		176,402
Pool #786335 4.500% 9/20/52		181,670		174,845
Pool #MA5194 5.000% 5/20/48		18,005		17,975
Pool #MA5597 5.000% 11/20/48		36,146		35,906
Pool #MA5653 5.000% 12/20/48		44,110		43,818
Pool #MA5712 5.000% 1/20/49		35,009		34,766
Pool #MA5878 5.000% 4/20/49		17,813		17,695

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #MA6287 5.000% 11/20/49	$	15,545	$	15,491
Pool #MA6413 5.000% 1/20/50		35,054		34,932
Pool #786340 5.000% 9/20/52		93,047		92,285
Pool #MA8348 5.000% 10/20/52		91,653		90,215
Pool #MA8428 5.000% 11/20/52		185,517		182,476
Pool #MA8490 5.000% 12/20/52		558,334		549,008
Pool #786474 5.000% 1/20/53		92,514		91,525
Pool #MA8569 5.000% 1/20/53		375,957		369,795
Pool #MA8725 5.000% 3/20/53		95,415		93,940
Pool #MA8429 5.500% 11/20/52		272,549		272,613
Pool #786535 5.500% 2/20/53		190,148		192,213
Pool #MA8726 5.500% 3/20/53		186,745		186,730
Pool #MA8801 5.500% 4/20/53		471,389		471,353
Pool #786835 5.500% 8/20/53		98,065		98,885
Pool #787228 6.000% 1/20/54		789,837		810,928
Pool #787236 6.500% 1/20/54		199,776		205,868
Government National Mortgage Association II, TBA
2.000% 4/20/54 (h)		3,100,000		2,539,893
3.500% 4/20/54 (h)		300,000		272,965
4.000% 4/20/54 (h)		700,000		655,104
4.500% 4/20/54 (h)		500,000		480,404
5.000% 4/20/54 (h)		1,300,000		1,277,849
5.500% 4/20/54 (h)		1,100,000		1,099,352
6.500% 4/20/54 (h)		100,000		101,662
Uniform Mortgage-Backed Security, TBA
2.000% 4/01/54 (h)		700,000		553,803
3.000% 4/01/54 (h)		800,000		688,438
3.500% 4/01/54 (h)		100,000		89,473
4.500% 4/01/54 (h)		900,000		857,004
5.000% 4/01/54 (h)		600,000		585,609
5.500% 4/01/54 (h)		100,000		99,520
6.000% 4/01/54 (h)		500,000		504,746
6.500% 4/01/54 (h)		400,000		408,594
				62,843,908
Whole Loans — 1.2%
Federal Home Loan Mortgage Corp. STACR REMICS Trust, Series 2022-DNA2, Class M2, 30 day USD SOFR Average + 3.750%
9.070% FRN 2/25/42 (b)		420,000		441,788
Federal National Mortgage Association Connecticut Avenue Securities, Series 2022-R04, Class 1M2, 30 day USD SOFR Average + 3.100%
8.420% FRN 3/25/42 (b)		2,000,000		2,077,358
				2,519,146

TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $79,207,066)				74,325,709

U.S. TREASURY OBLIGATIONS — 5.2%
U.S. Treasury Bonds & Notes — 5.2%
U.S. Treasury Bonds
4.125% 8/15/53		250,000		240,372
4.500% 2/15/44 (c)		30,000		30,206
4.750% 11/15/53		270,000		288,225
U.S. Treasury Inflation-Indexed Notes
1.125% 1/15/33		1,604,576		1,504,790
U.S. Treasury Notes
3.750% 12/31/28		30,000		29,370

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.000% 1/31/31	$	1,390,000	$	1,372,231
4.000% 2/15/34		270,000		265,528
4.125% 3/31/31		5,700,000		5,672,391
4.250% 2/28/29 (c)		280,000		280,447
4.250% 2/28/31		1,380,000		1,382,884
4.625% 2/28/26 (c)		190,000		189,844
				11,256,288

TOTAL U.S. TREASURY OBLIGATIONS (Cost $11,346,093)				11,256,288

TOTAL BONDS & NOTES (Cost $229,878,121)				214,281,007

TOTAL PURCHASED OPTIONS(#) — 0.1% (Cost $199,482)				109,996

TOTAL LONG-TERM INVESTMENTS (Cost $230,077,603)				214,391,003

SHORT-TERM INVESTMENTS — 7.6%
Discount Notes — 0.3%
Federal Home Loan Banks, 5.380%, due 4/16/24		570,000		568,566

	Number of Shares
Investment of Cash Collateral from Securities Loaned — 0.9%
State Street Navigator Securities Lending Government Money Market Portfolio (i)		1,961,290		1,961,290

	Principal Amount
Repurchase Agreement — 4.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (j)	$	10,704,759		10,704,759
U.S. Treasury Bill — 1.5%
U.S. Treasury Bills
5.349% 5/28/24 (k)		1,120,000		1,110,193
5.370% 7/30/24 (k)		960,000		943,487
5.377% 5/02/24 (k)		810,000		806,317
5.379% 5/09/24 (k)		410,000		407,720
				3,267,717

TOTAL SHORT-TERM INVESTMENTS (Cost $16,503,188)				16,502,332

TOTAL INVESTMENTS — 106.5% (Cost $246,580,791) (l)				230,893,335

Other Assets/(Liabilities) — (6.5)%				(14,009,327)

NET ASSETS — 100.0%			$	216,884,008

Abbreviation Legend

CLO	Collateralized Loan Obligation

CMT	Constant Maturity Treasury Index

FRN	Floating Rate Note

LIBOR

London InterBank Offered Rate

REMICS

Real Estate Mortgage Investment Conduits

RFUCCT

Refinitiv USD IBOR Consumer Cash Fallbacks Term.

SOFR	Secured Overnight Financing Rate

STEP	Step Coupon Bond

TBA	To Be Announced

VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	All or a portion of the security represents unsettled bank loan commitments at March 31, 2024 where the rate will be determined at time of settlement.

(b)

Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2024, the aggregate market value of these securities amounted to $39,847,651 or 18.37% of net assets.

(c)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $2,081,440 or 0.96% of net assets. The Fund received $165,199 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(d)	Security is perpetual and has no stated maturity date.

(e)	The principal amount of the security is in foreign currency. The market value is in U.S. dollars.

(f)

Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at March 31, 2024.

(g)	May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(h)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.

(i)	Represents investment of security lending cash collateral. (Note 2).

(j)	Maturity value of $10,706,662. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $10,918,880.

(k)	The rate shown represents yield-to-maturity.

(l)	See Note 3 for aggregate cost for federal tax purposes.

(#) OTC Options Purchased
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/ (Received)		Unrealized Appreciation (Depreciation)
Put
USD Put AUD Call	BNP Paribas S.A.		4/17/24		0.67		1,678,112	USD	1,678,112	$	1,007	$	18,728	$	(17,721)
USD Put JPY Call	BNP Paribas S.A.		4/18/24		143.42		1,820,000	USD	1,820,000		546		21,203		(20,657)
										$	1,553	$	39,931	$	(38,378)

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/ (Received)		Unrealized Appreciation (Depreciation)
Call
U.S. Treasury Note 5 Year Future	4/05/24		107.50		62	USD	6,634,969	$	6,782	$	7,475	$	(693)
U.S. Treasury Note 5 Year Future	4/05/24		107.75		31	USD	3,317,484		1,938		2,039		(101)
U.S. Treasury Note 6-7 Year Future	4/05/24		111.50		135	USD	14,957,578		18,985		19,218		(233)
U.S. Treasury Note 5 Year Future	4/26/24		108.00		59	USD	6,313,922		9,219		19,907		(10,688)
3 Month SOFR Future	6/14/24		96.00		148	USD	35,100,050		3,700		31,761		(28,061)
								$	40,624	$	80,400	$	(39,776)
Put
U.S. Treasury Note 5 Year Future	4/05/24		106.25		31	USD	3,317,484	$	1,695	$	1,459	$	236
U.S. Treasury Note 5 Year Future	4/05/24		106.50		62	USD	6,634,969		5,812		5,435		377
U.S. Treasury Note 6-7 Year Future	4/05/24		110.00		135	USD	14,957,578		16,875		17,108		(233)
3 Month SOFR Future	4/12/24		94.75		43	USD	10,197,988		537		6,290		(5,753)
3 Month SOFR Future	12/13/24		95.50		52	USD	12,405,900		42,900		48,859		(5,959)
								$	67,819	$	79,151	$	(11,332)
								$	108,443	$	159,551	$	(51,108)

OTC Options Written

Description

Counterparty

Expiration Date

Exercise Price

No. of Contracts

Notional
Amount

Value

Premiums
Paid/
(Received)

Unrealized Appreciation (Depreciation)

Put

USD Put MXN Call

Citigroup Global Markets, Inc.

6/03/24

16.80

805,468

USD

805,468

(11,035)

(4,567)

(6,468)

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/ (Received)		Unrealized Appreciation (Depreciation)
Call
U.S. Treasury Note 5 Year Future	4/05/24		107.00		31	USD	3,317,484	$	(8,961)	$	(8,884)	$	(77)
U.S. Treasury Note 6-7 Year Future	4/05/24		110.75		45	USD	4,985,859		(18,985)		(18,798)		(187)
U.S. Treasury Note 5 Year Future	4/26/24		108.00		79	USD	8,454,234		(26,539)		(41,199)		14,660
3 Month SOFR Future	9/13/24		96.88		31	USD	7,372,963		(1,938)		(13,510)		11,572
3 Month SOFR Future	9/13/24		97.00		147	USD	34,962,113		(8,269)		(31,567)		23,298
3 Month SOFR Future	12/13/24		97.12		52	USD	12,405,900		(6,500)		(28,241)		21,741
								$	(71,192)	$	(142,199)	$	71,007
Put
U.S. Treasury Note 5 Year Future	4/05/24		107.00		31	USD	3,317,484	$	(8,477)	$	(8,134)	$	(343)
U.S. Treasury Note 6-7 Year Future	4/05/24		110.75		45	USD	4,985,859		(16,875)		(16,907)		32
3 Month SOFR Future	12/13/24		95.00		52	USD	12,405,900		(13,975)		(21,341)		7,366
								$	(39,327)	$	(46,382)	$	7,055
								$	(110,519)	$	(188,581)	$	78,062

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
BNP Paribas SA	4/19/24	NOK	12,348,502	EUR	1,089,114	$	(37,839)
BNP Paribas SA	4/19/24	EUR	644,000	USD	701,999		(6,778)
BNP Paribas SA	4/19/24	USD	125,816	NOK	1,310,000		5,101
Citibank N.A.	4/19/24	EUR	677,220	USD	746,284		(15,200)
Citibank N.A.	4/19/24	AUD	6,232,927	USD	4,179,078		(115,546)
Citibank N.A.	4/19/24	IDR	5,822,697,290	USD	375,513		(8,451)
Citibank N.A.	4/19/24	USD	48,502	JPY	7,130,000		1,280
Citibank N.A.	4/19/24	USD	1,953,401	GBP	1,532,007		19,610
Citibank N.A.	4/19/24	USD	2,008,295	EUR	1,850,000		11,155
Citibank N.A.	4/19/24	USD	259,559	IDR	4,069,368,399		3,027
Goldman Sachs & Co.	4/19/24	EUR	24,600	USD	26,850		(293)
Goldman Sachs & Co.	4/19/24	BRL	5,160,362	USD	1,031,633		(4,518)
Goldman Sachs & Co.	4/19/24	USD	1,343,792	MXN	22,848,710		(26,990)
Goldman Sachs & Co.	4/19/24	CHF	1,480,000	USD	1,666,287		(22,311)
Goldman Sachs & Co.	4/19/24	USD	3,021,778	CHF	2,655,600		71,951
Goldman Sachs & Co.	4/19/24	USD	696,045	EUR	640,000		5,143
JP Morgan Chase Bank N.A.	4/19/24	USD	113,264	IDR	1,753,328,891		2,735
JP Morgan Chase Bank N.A.	4/19/24	USD	1,568,636	CNH	11,159,745		31,328
JP Morgan Chase Bank N.A.	4/19/24	USD	1,160,337	MXN	19,968,506		(37,650)
Morgan Stanley & Co. LLC	4/19/24	JPY	748,109,864	USD	5,244,202		(289,443)
Morgan Stanley & Co. LLC	4/19/24	CAD	2,166,165	USD	1,617,890		(18,293)
Morgan Stanley & Co. LLC	4/19/24	USD	2,216,051	JPY	323,290,000		74,890
Morgan Stanley & Co. LLC	4/19/24	USD	1,019,649	CAD	1,380,000		593
						$	(356,499)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
Euro-OAT	6/06/24		17	$	2,330,909	$	19,786
U.S. Treasury Note 10 Year	6/18/24		193		21,344,350		39,447
U.S. Treasury Ultra Bond	6/18/24		214		27,153,765		452,235
UK Long Gilt	6/26/24		16		1,967,770		50,458
U.S. Treasury Note 2 Year	6/28/24		31		6,343,417		(4,401)
U.S. Treasury Note 5 Year	6/28/24		117		12,521,323		(495)
3 Month SOFR	3/18/25		90		21,521,316		(49,566)
3 Month SOFR	3/17/26		163		39,167,262		52,576
						$	560,040
Short
Euro-Bund	6/06/24		21	$	(2,994,849)	$	(26,988)
Euro-Buxl 30 Year Bond	6/06/24		2		(284,944)		(8,072)
Japanese 10 Year Bond	6/13/24		4		(3,844,806)		(4,315)
3 Month SOFR	6/18/24		17		(4,019,372)		(4,209)
U.S. Treasury Long Bond	6/18/24		15		(1,780,068)		(26,495)
U.S. Treasury Ultra 10 Year	6/18/24		65		(7,392,350)		(57,259)
						$	(127,338)

Centrally Cleared Credit Default Swaps - Buy Protection

Reference
Obligation/Index

Rate Paid by Fund

Payment Frequency

Termination Date

Notional
Amount

Value

Upfront
Premium
Paid/
(Received)

Unrealized Appreciation (Depreciation)

CDX.NA.HY Series 42†

5.000%

Quarterly

6/20/29

USD

239,800

(17,248)

(16,786)

(462)

Centrally Cleared Credit Default Swaps - Sell Protection††

Reference
Obligation/ Index

Rate Received by Fund

Payment Frequency

Termination Date

Credit Rating

Notional
Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.IG Series 42†

1.000%

Quarterly

6/20/29

BBB*

USD

34,823,000

788,636

770,433

18,203

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
12-Month USD SOFR	Annually		Fixed 4.100%		Annually		3/10/26	USD	18,692,000	$	(155,880)	$	225,325	$	(381,205)
Fixed 3.870%	Annually		12-Month USD SOFR		Annually		2/28/31	USD	11,806,000		(29,174)		(33,269)		4,095
Fixed 3.400%	Annually		12-Month USD SOFR		Annually		3/10/34	USD	4,169,000		145,327		(70,098)		215,425
Fixed 3.050%	Annually		12-Month USD SOFR		Annually		2/15/48	USD	10,646,000		1,104,965		208,368		896,597
										$	1,065,238	$	330,326	$	734,912

OTC Interest Rate Swaps

Paid by the Fund

Received by the Fund

Rate/ Reference

Frequency

Rate/
Reference

Frequency

Counterparty

Termination Date

Notional
Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

BRL-CDI

Maturity

Fixed 10.230%

Maturity

JP Morgan Chase Bank N.A.

1/02/29

BRL

17,860,000

(65,597)

—

(65,597)

Rating is determined by Western Asset Management Company and represents a weighted average of the ratings of all securities included in the underlying index for the credit default swap. Ratings used in the weighted average are from Moody's Investors Service Inc., S&P Global Ratings, or Fitch Ratings, whichever is the highest for each constituent. All ratings are as of the report date and do not reflect subsequent changes.

†	Payment is based on a percentage of the index. Reference entities are a number of individual issuers comprising the index.

††

For each credit derivative with sold protection, the credit ratings of the entities referenced, as rated by any rating organization, are included in the equivalent S&P Global Ratings or Western Asset Management Company's rating category, as applicable. The reference entity rating represents the likelihood of a potential payment by the Fund if the referenced entity experiences a credit event as of period end. Notional amounts represent the maximum potential amount of future payments (undiscounted) the Fund could be required to make under the credit derivatives with sold protection.

Currency Legend

AUD	Australian Dollar

BRL	Brazilian Real

CAD	Canadian Dollar

CHF	Swiss Franc

CNH	Offshore Chinese Yuan

EUR

Euro

GBP	British Pound

IDR	Indonesian Rupiah

INR	Indian Rupee

JPY	Japanese Yen

MXN	Mexican Peso

NOK	Norwegian Krone

USD	U.S. Dollar

MML Equity Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.0%

COMMON STOCK — 99.0%
Communication Services — 3.6%
AT&T, Inc.		309,800	$	5,452,481
Charter Communications, Inc. Class A (a)		4,600		1,336,898
Comcast Corp. Class A		253,300		10,980,555
Fox Corp. Class A		21,500		672,305
Omnicom Group, Inc.		13,800		1,335,288
T-Mobile US, Inc.		18,451		3,011,572
Verizon Communications, Inc.		205,500		8,622,780
				31,411,879
Consumer Discretionary — 6.8%
AutoNation, Inc. (a)		5,000		827,900
AutoZone, Inc. (a)		570		1,796,440
Bath & Body Works, Inc.		9,800		490,196
Best Buy Co., Inc.		11,500		943,345
Booking Holdings, Inc.		899		3,261,464
Boyd Gaming Corp.		5,298		356,661
Brunswick Corp.		4,700		453,644
CarMax, Inc. (a)		6,800		592,348
Cie Financiere Richemont SA Registered Class A		8,987		1,374,779
Crocs, Inc. (a)		2,600		373,880
Darden Restaurants, Inc.		3,300		551,595
Dick's Sporting Goods, Inc.		1,900		427,234
Dillard's, Inc. Class A (b)		500		235,820
DR Horton, Inc.		23,300		3,834,015
eBay, Inc.		26,000		1,372,280
Expedia Group, Inc. (a)		5,700		785,175
Ford Motor Co.		250,400		3,325,312
General Motors Co.		74,200		3,364,970
H&R Block, Inc.		4,200		206,262
Hilton Worldwide Holdings, Inc.		4,800		1,023,888
Home Depot, Inc.		7,671		2,942,596
Lear Corp.		2,900		420,152
Lennar Corp. Class A		17,500		3,009,650
Levi Strauss & Co. Class A		4,700		93,953
Lithia Motors, Inc.		1,400		421,204
Lowe's Cos., Inc.		46,900		11,946,837
Mattel, Inc. (a)		15,300		303,093
McDonald's Corp.		5,100		1,437,945
MGM Resorts International (a)		13,800		651,498
Murphy USA, Inc.		1,100		461,120
Norwegian Cruise Line Holdings Ltd. (a) (b)		43,200		904,176
NVR, Inc. (a)		100		809,996
Penske Automotive Group, Inc.		3,700		599,363
PulteGroup, Inc.		17,100		2,062,602
PVH Corp.		1,700		239,037
Ralph Lauren Corp.		2,350		441,236

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Service Corp. International		24,436	$	1,813,396
Skechers USA, Inc. Class A (a)		6,700		410,442
Toll Brothers, Inc.		2,900		375,173
Tractor Supply Co.		4,900		1,282,428
Ulta Beauty, Inc. (a)		3,000		1,568,640
Williams-Sonoma, Inc.		3,400		1,079,602
				58,871,347
Consumer Staples — 5.5%
Altria Group, Inc.		91,900		4,008,678
BJ's Wholesale Club Holdings, Inc. (a)		3,700		279,905
Bunge Global SA		5,000		512,600
Coca-Cola Co.		59,200		3,621,856
Coca-Cola Consolidated, Inc.		400		338,564
Colgate-Palmolive Co.		37,600		3,385,880
Dollar Tree, Inc. (a)		1,424		189,606
Ingredion, Inc.		3,400		397,290
Kenvue, Inc.		323,305		6,938,125
Keurig Dr Pepper, Inc.		19,600		601,132
Kraft Heinz Co.		63,800		2,354,220
Kroger Co.		36,600		2,090,958
Molson Coors Beverage Co. Class B		10,546		709,219
Mondelez International, Inc. Class A		46,770		3,273,900
Philip Morris International, Inc.		77,400		7,091,388
Procter & Gamble Co.		26,169		4,245,920
Sysco Corp.		15,800		1,282,644
Target Corp.		12,800		2,268,288
Walmart, Inc.		64,794		3,898,655
				47,488,828
Energy — 12.6%
APA Corp.		17,100		587,898
Baker Hughes Co.		43,300		1,450,550
Cheniere Energy, Inc.		11,800		1,903,104
Chevron Corp.		98,577		15,549,536
Chord Energy Corp.		1,200		213,888
ConocoPhillips		109,649		13,956,125
Coterra Energy, Inc.		36,900		1,028,772
Devon Energy Corp.		17,500		878,150
Diamondback Energy, Inc.		7,900		1,565,543
EOG Resources, Inc.		36,800		4,704,512
EQT Corp.		90,381		3,350,424
Exxon Mobil Corp.		229,053		26,625,121
Halliburton Co.		179,138		7,061,620
Kinder Morgan, Inc.		170,100		3,119,634
Marathon Oil Corp.		36,015		1,020,665
Marathon Petroleum Corp.		19,500		3,929,250
Murphy Oil Corp.		4,300		196,510
New Fortress Energy, Inc. (b)		6,400		195,776
Nov, Inc.		12,400		242,048
Occidental Petroleum Corp.		47,400		3,080,526
Phillips 66		27,500		4,491,850
Pioneer Natural Resources Co.		2,500		656,250
Range Resources Corp.		118,259		4,071,657
Schlumberger NV		68,094		3,732,232
Valero Energy Corp.		20,300		3,465,007

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Williams Cos., Inc.		77,583	$	3,023,409
				110,100,057
Financials — 25.8%
Aflac, Inc.		34,800		2,987,928
Allstate Corp.		16,947		2,932,000
Ally Financial, Inc.		14,700		596,673
American Express Co.		57,055		12,990,853
American Financial Group, Inc.		3,700		504,976
American International Group, Inc.		34,800		2,720,316
Ameriprise Financial, Inc.		5,500		2,411,420
Arch Capital Group Ltd. (a)		20,000		1,848,800
Assurant, Inc.		2,400		451,776
Bank of America Corp.		481,872		18,272,586
Bank of New York Mellon Corp.		44,000		2,535,280
Berkshire Hathaway, Inc. Class B (a)		25,044		10,531,503
Capital One Financial Corp.		18,700		2,784,243
Carlyle Group, Inc.		17,600		825,616
Charles Schwab Corp.		40,000		2,893,600
Chubb Ltd.		27,241		7,058,960
Cincinnati Financial Corp.		8,200		1,018,194
Citigroup, Inc.		141,000		8,916,840
Citizens Financial Group, Inc.		19,900		722,171
CME Group, Inc.		8,200		1,765,378
Commerce Bancshares, Inc.		3,800		202,160
Corebridge Financial, Inc.		37,635		1,081,254
Corpay, Inc. (a)		4,193		1,293,708
Cullen/Frost Bankers, Inc.		2,800		315,196
Discover Financial Services		14,800		1,940,132
East West Bancorp, Inc.		14,115		1,116,638
Equitable Holdings, Inc.		22,100		840,021
Fidelity National Financial, Inc.		14,200		754,020
Fifth Third Bancorp		29,500		1,097,695
First American Financial Corp.		5,000		305,250
Fiserv, Inc. (a)		73,762		11,788,643
Global Payments, Inc.		12,700		1,697,482
Globe Life, Inc.		4,600		535,302
Goldman Sachs Group, Inc.		23,363		9,758,491
Hartford Financial Services Group, Inc.		22,876		2,357,372
Huntington Bancshares, Inc.		45,400		633,330
JP Morgan Chase & Co.		200,839		40,228,052
KeyCorp.		29,300		463,233
Loews Corp.		13,300		1,041,257
LPL Financial Holdings, Inc.		3,700		977,540
M&T Bank Corp.		7,200		1,047,168
Markel Group, Inc. (a)		610		928,103
MetLife, Inc.		94,635		7,013,400
Morgan Stanley		88,400		8,323,744
Northern Trust Corp.		8,900		791,388
Old Republic International Corp.		15,300		470,016
PayPal Holdings, Inc. (a)		29,600		1,982,904
PNC Financial Services Group, Inc.		23,487		3,795,499
Primerica, Inc.		1,600		404,736
Principal Financial Group, Inc.		13,800		1,191,078
Progressive Corp.		7,300		1,509,786
Prudential Financial, Inc.		19,500		2,289,300
Raymond James Financial, Inc.		10,200		1,309,884
Regions Financial Corp.		39,800		837,392

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Reinsurance Group of America, Inc.		3,197	$	616,637
Robinhood Markets, Inc. Class A (a)		21,400		430,782
SEI Investments Co.		3,100		222,890
State Street Corp.		18,000		1,391,760
Stifel Financial Corp.		5,200		406,484
Synchrony Financial		23,000		991,760
T. Rowe Price Group, Inc.		11,300		1,377,696
Travelers Cos., Inc.		35,318		8,128,085
Unum Group		10,300		552,698
Visa, Inc. Class A		6,488		1,810,671
W. R. Berkley Corp.		13,800		1,220,472
Webster Financial Corp.		7,500		380,775
Wells Fargo & Co.		197,389		11,440,666
Willis Towers Watson PLC		3,200		880,000
				224,941,663
Health Care — 16.3%
AbbVie, Inc.		87,700		15,970,170
Agilent Technologies, Inc.		2,000		291,020
Amgen, Inc.		27,800		7,904,096
AstraZeneca PLC Sponsored ADR		54,519		3,693,662
Bristol-Myers Squibb Co.		6,400		347,072
Cardinal Health, Inc.		13,808		1,545,115
Cencora, Inc.		32,689		7,943,100
Centene Corp. (a)		23,200		1,820,736
Cigna Group		23,941		8,695,132
CVS Health Corp.		54,500		4,346,920
Danaher Corp.		9,218		2,301,919
DaVita, Inc. (a)		4,400		607,420
Elevance Health, Inc.		31,577		16,373,938
GE HealthCare Technologies, Inc. (a)		24,991		2,271,932
Gilead Sciences, Inc.		65,400		4,790,550
HCA Healthcare, Inc.		28,260		9,425,558
Henry Schein, Inc. (a)		6,900		521,088
Hologic, Inc. (a)		11,676		910,261
Jazz Pharmaceuticals PLC (a)		2,700		325,134
Johnson & Johnson		139,671		22,094,555
Laboratory Corp. of America Holdings		6,100		1,332,606
McKesson Corp.		10,300		5,529,555
Medtronic PLC		76,062		6,628,803
Merck & Co., Inc.		30,969		4,086,360
Molina Healthcare, Inc. (a)		1,900		780,577
Quest Diagnostics, Inc.		8,700		1,158,057
Tenet Healthcare Corp. (a)		24,634		2,589,280
Thermo Fisher Scientific, Inc.		5,109		2,969,402
UnitedHealth Group, Inc.		7,413		3,667,211
Universal Health Services, Inc. Class B		4,700		857,562
Viatris, Inc.		58,600		699,684
				142,478,475
Industrials — 12.0%
AGCO Corp.		3,650		449,023
Allegion PLC		4,200		565,782
AMETEK, Inc.		15,352		2,807,881
Builders FirstSource, Inc. (a)		7,700		1,605,835
CACI International, Inc. Class A (a)		800		303,064
Caterpillar, Inc.		25,200		9,234,036

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
CSX Corp.		223,538	$	8,286,554
Cummins, Inc.		18,506		5,452,793
Deere & Co.		16,800		6,900,432
Delta Air Lines, Inc.		20,100		962,187
Dover Corp.		12,800		2,268,032
FedEx Corp.		13,300		3,853,542
Ferguson PLC		5,300		1,157,679
Fortune Brands Innovations, Inc.		6,900		584,223
General Dynamics Corp.		9,605		2,713,316
General Electric Co.		25,687		4,508,839
Honeywell International, Inc.		8,300		1,703,575
Huntington Ingalls Industries, Inc.		2,100		612,087
IDEX Corp.		7,443		1,816,241
Johnson Controls International PLC		33,300		2,175,156
L3Harris Technologies, Inc.		20,070		4,276,917
Leidos Holdings, Inc.		7,049		924,053
Lockheed Martin Corp.		12,300		5,594,901
Masco Corp.		16,600		1,309,408
Middleby Corp. (a)		2,700		434,133
Norfolk Southern Corp.		7,745		1,973,968
Oshkosh Corp.		3,100		386,601
Owens Corning		6,900		1,150,920
PACCAR, Inc.		27,213		3,371,418
Parker-Hannifin Corp.		6,600		3,668,214
Pentair PLC		8,400		717,696
Regal Rexnord Corp.		2,100		378,210
Robert Half, Inc.		5,200		412,256
Rockwell Automation, Inc.		9,000		2,621,970
RTX Corp.		36,700		3,579,351
Science Applications International Corp.		2,300		299,897
Siemens AG Registered		11,444		2,184,718
Snap-on, Inc.		2,900		859,038
Textron, Inc.		14,500		1,390,985
Timken Co.		2,900		253,547
U-Haul Holding Co. (UHAL US) (a) (b)		1,100		74,294
U-Haul Holding Co. (UHAL/B US)		9,800		653,464
UFP Industries, Inc.		2,700		332,127
Union Pacific Corp.		13,585		3,340,959
United Rentals, Inc.		3,400		2,451,774
Veralto Corp.		2,897		256,848
WESCO International, Inc.		1,400		239,792
Westinghouse Air Brake Technologies Corp.		25,316		3,688,035
				104,785,771
Information Technology — 8.9%
Adobe, Inc. (a)		4,312		2,175,835
Amkor Technology, Inc.		6,800		219,232
Amphenol Corp. Class A		14,912		1,720,099
Analog Devices, Inc.		10,600		2,096,574
Applied Materials, Inc.		9,309		1,919,795
Arrow Electronics, Inc. (a)		4,700		608,462
Cisco Systems, Inc.		215,300		10,745,623
Cognizant Technology Solutions Corp. Class A		24,700		1,810,263
Corning, Inc.		44,000		1,450,240
Dell Technologies, Inc. Class C		12,400		1,414,964
Gen Digital, Inc.		27,600		618,240
Hewlett Packard Enterprise Co.		82,900		1,469,817
HP, Inc.		82,200		2,484,084

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Intel Corp.		59,200	$	2,614,864
International Business Machines Corp.		41,800		7,982,128
Jabil, Inc.		9,500		1,272,525
Keysight Technologies, Inc. (a)		11,500		1,798,370
Lam Research Corp.		2,146		2,084,989
Microchip Technology, Inc.		23,400		2,099,214
Micron Technology, Inc.		30,732		3,622,996
Microsoft Corp.		3,455		1,453,588
NetApp, Inc.		10,300		1,081,191
NXP Semiconductors NV		6,860		1,699,702
QUALCOMM, Inc.		76,975		13,031,868
Salesforce, Inc.		4,300		1,295,074
Skyworks Solutions, Inc.		8,400		909,888
TD SYNNEX Corp.		4,700		531,570
TE Connectivity Ltd.		17,156		2,491,737
Texas Instruments, Inc.		24,661		4,296,193
Twilio, Inc. Class A (a)		5,700		348,555
				77,347,680
Materials — 3.4%
Berry Global Group, Inc.		6,100		368,928
CF Industries Holdings, Inc.		8,200		682,322
Cleveland-Cliffs, Inc. (a)		24,800		563,952
Commercial Metals Co.		2,500		146,925
Crown Holdings, Inc.		8,700		689,562
Dow, Inc.		35,300		2,044,929
Eagle Materials, Inc.		1,700		461,975
Eastman Chemical Co.		6,100		611,342
Franco-Nevada Corp.		9,300		1,108,188
Freeport-McMoRan, Inc.		56,900		2,675,438
Graphic Packaging Holding Co.		16,000		466,880
International Paper Co.		16,900		659,438
Linde PLC		6,857		3,183,842
LyondellBasell Industries NV Class A		17,008		1,739,578
Martin Marietta Materials, Inc.		1,620		994,583
Mosaic Co.		25,900		840,714
Nucor Corp.		19,300		3,819,470
Nutrien Ltd.		11,428		620,655
Olin Corp.		6,902		405,838
Packaging Corp. of America		5,800		1,100,724
PPG Industries, Inc.		6,500		941,850
Reliance, Inc.		3,700		1,236,466
Southern Copper Corp.		7,723		822,654
Steel Dynamics, Inc.		13,500		2,001,105
US Steel Corp.		11,900		485,282
Wheaton Precious Metals Corp.		27,400		1,291,362
				29,964,002
Real Estate — 0.8%
Equity LifeStyle Properties, Inc.		22,100		1,423,240
Jones Lang LaSalle, Inc. (a)		1,400		273,126
Prologis, Inc.		7,095		923,911
Public Storage		8,361		2,425,192
Weyerhaeuser Co.		63,594		2,283,660
				7,329,129

MML Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Utilities — 3.3%
Ameren Corp.		32,994	$	2,440,236
CenterPoint Energy, Inc.		21,500		612,535
Consolidated Edison, Inc.		16,900		1,534,689
Constellation Energy Corp.		24,549		4,537,883
Duke Energy Corp.		38,900		3,762,019
Edison International		17,500		1,237,775
NextEra Energy, Inc.		46,745		2,987,473
OGE Energy Corp.		10,261		351,952
Pinnacle West Capital Corp.		6,098		455,703
PPL Corp.		38,600		1,062,658
Public Service Enterprise Group, Inc.		33,000		2,203,740
Sempra		32,600		2,341,658
Southern Co.		34,324		2,462,404
Vistra Corp.		22,100		1,539,265
Xcel Energy, Inc.		24,900		1,338,375
				28,868,365

TOTAL COMMON STOCK (Cost $629,126,960)				863,587,196

TOTAL EQUITIES (Cost $629,126,960)				863,587,196

EXCHANGE-TRADED FUNDS — 0.5%
iShares Russell 1000 Value ETF (b)		23,300		4,173,263

TOTAL EXCHANGE-TRADED FUNDS (Cost $3,852,618)				4,173,263

TOTAL LONG-TERM INVESTMENTS (Cost $632,979,578)				867,760,459

SHORT-TERM INVESTMENTS — 0.4%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		436,219		436,219
Mutual Fund — 0.2%
T. Rowe Price Government Reserve Investment Fund		1,339,997		1,339,997

	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (d)	$	2,114,455		2,114,455

TOTAL SHORT-TERM INVESTMENTS (Cost $3,890,671)				3,890,671

TOTAL INVESTMENTS — 99.9% (Cost $636,870,249) (e)				871,651,130

Other Assets/(Liabilities) — 0.1%				823,768

NET ASSETS — 100.0%			$	872,474,898

Abbreviation Legend

ADR	American Depositary Receipt

ETF	Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.

(b)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $2,718,314 or 0.31% of net assets. The Fund received $2,355,079 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(c)	Represents investment of security lending cash collateral. (Note 2).

(d)	Maturity value of $2,114,831. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $2,156,844.

(e)	See Note 3 for aggregate cost for federal tax purposes.

MML Equity Rotation Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.8%

COMMON STOCK — 99.8%
Communication Services — 2.1%
Cable One, Inc.		137	$	57,969
ESC GCI Liberty Inc (a) (b) (c)		2,102		—
Fox Corp. Class A		2,754		86,118
Fox Corp. Class B		1,381		39,524
Frontier Communications Parent, Inc. (c)		5,953		145,849
Liberty Media Corp-Liberty Live Class C (c)		937		41,059
Liberty Media Corp-Liberty SiriusXM Class C (c)		3,748		111,353
Liberty Media Corp.-Liberty Live Class A (c)		453		19,185
Liberty Media Corp.-Liberty SiriusXM Class A (c)		1,812		53,816
News Corp. Class A		6,503		170,249
News Corp. Class B		2,089		56,528
Nexstar Media Group, Inc.		831		143,173
Paramount Global Class B		14,034		165,180
Sirius XM Holdings, Inc. (d)		8,464		32,840
TripAdvisor, Inc. (c)		2,710		75,311
				1,198,154
Consumer Discretionary — 16.0%
ADT, Inc.		5,129		34,467
Advance Auto Parts, Inc.		1,449		123,295
Aramark		3,706		120,519
AutoNation, Inc. (c)		740		122,529
Bath & Body Works, Inc.		5,615		280,862
Best Buy Co., Inc.		4,341		356,092
BorgWarner, Inc.		5,674		197,115
Boyd Gaming Corp.		1,793		120,705
Brunswick Corp.		1,729		166,883
Burlington Stores, Inc. (c)		572		132,813
Capri Holdings Ltd. (c)		2,976		134,813
CarMax, Inc. (c)		3,843		334,764
Carter's, Inc.		898		76,043
Choice Hotels International, Inc.		243		30,703
Columbia Sportswear Co.		453		36,775
Crocs, Inc. (c)		962		138,336
Dick's Sporting Goods, Inc.		1,458		327,846
Expedia Group, Inc. (c)		2,186		301,121
Gap, Inc.		4,743		130,670
Gentex Corp.		2,003		72,348
Grand Canyon Education, Inc. (c)		408		55,574
H&R Block, Inc.		3,693		181,363
Harley-Davidson, Inc.		3,197		139,837
Hyatt Hotels Corp. Class A		405		64,646
Kohl's Corp.		2,697		78,618
Lear Corp.		1,428		206,889
Leggett & Platt, Inc.		3,233		61,912
Lithia Motors, Inc.		659		198,267

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
LKQ Corp.		2,974	$	158,841
Macy's, Inc.		6,603		131,994
Marriott Vacations Worldwide Corp.		891		95,987
Mattel, Inc. (c)		6,933		137,343
MGM Resorts International (c)		3,995		188,604
Mister Car Wash, Inc. (c) (d)		1,205		9,339
Mohawk Industries, Inc. (c)		1,289		168,717
Murphy USA, Inc.		480		201,216
Newell Brands, Inc.		9,284		74,551
Nordstrom, Inc.		2,785		56,452
Ollie's Bargain Outlet Holdings, Inc. (c)		608		48,379
Penn Entertainment, Inc. (c)		3,741		68,124
Penske Automotive Group, Inc.		487		78,889
Petco Health & Wellness Co., Inc. (c) (d)		2,001		4,562
Phinia, Inc.		1,139		43,772
Polaris, Inc.		1,318		131,958
PulteGroup, Inc.		3,673		443,037
PVH Corp.		1,458		205,009
Ralph Lauren Corp.		988		185,507
Restoration Hardware, Inc. (c)		384		133,732
Service Corp. International		1,335		99,070
Skechers USA, Inc. Class A (c)		1,536		94,095
Tapestry, Inc.		3,846		182,608
Tempur Sealy International, Inc.		3,144		178,642
Texas Roadhouse, Inc.		663		102,414
Thor Industries, Inc.		1,246		146,206
Toll Brothers, Inc.		2,704		349,816
TopBuild Corp. (c)		688		303,222
Travel & Leisure Co.		1,819		89,058
Under Armour, Inc. Class A (c)		4,600		33,948
Under Armour, Inc. Class C (c)		4,522		32,287
Victoria's Secret & Co. (c)		1,909		36,996
Wendy's Co.		1,780		33,535
Whirlpool Corp.		1,271		152,050
Williams-Sonoma, Inc.		1,593		505,825
Wyndham Hotels & Resorts, Inc.		830		63,702
YETI Holdings, Inc. (c)		811		31,264
				9,226,556
Consumer Staples — 4.7%
Albertsons Cos., Inc. Class A		10,132		217,230
BJ's Wholesale Club Holdings, Inc. (c)		3,241		245,182
Boston Beer Co., Inc. Class A (c)		86		26,180
Bunge Global SA		1,831		187,714
Casey's General Stores, Inc.		900		286,605
Darling Ingredients, Inc. (c)		1,891		87,950
Flowers Foods, Inc.		3,445		81,819
Grocery Outlet Holding Corp. (c)		2,316		66,654
Ingredion, Inc.		1,194		139,519
Olaplex Holdings, Inc. (c)		3,180		6,106
Performance Food Group Co. (c)		3,727		278,183
Pilgrim's Pride Corp. (c)		1,002		34,389
Post Holdings, Inc. (c)		1,304		138,589
Reynolds Consumer Products, Inc.		597		17,050
Seaboard Corp.		6		19,344
Spectrum Brands Holdings, Inc.		484		43,081
Tyson Foods, Inc. Class A		6,799		399,305
US Foods Holding Corp (c)		5,551		299,587

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Walgreens Boots Alliance, Inc.		7,378	$	160,029
				2,734,516
Energy — 7.2%
Antero Midstream Corp.		6,513		91,573
Antero Resources Corp. (c)		6,878		199,462
APA Corp.		7,546		259,432
Chesapeake Energy Corp. (d)		3,086		274,129
Coterra Energy, Inc.		14,496		404,149
Diamondback Energy, Inc.		2,032		402,681
DT Midstream, Inc. (c)		2,368		144,685
EQT Corp.		8,770		325,104
HF Sinclair Corp.		3,433		207,250
Marathon Oil Corp.		15,204		430,881
New Fortress Energy, Inc. (d)		666		20,373
Nov, Inc.		4,462		87,098
Ovintiv, Inc.		5,943		308,442
Range Resources Corp.		5,693		196,010
Southwestern Energy Co. (c)		26,683		202,257
Targa Resources Corp.		3,460		387,485
TechnipFMC PLC		8,177		205,325
				4,146,336
Financials — 21.9%
Affiliated Managers Group, Inc.		866		145,029
Ally Financial, Inc.		6,581		267,123
American Financial Group, Inc.		991		135,252
Annaly Capital Management, Inc.		12,009		236,457
Assurant, Inc.		1,163		218,923
Assured Guaranty Ltd.		1,387		121,016
Axis Capital Holdings Ltd.		1,897		123,343
Bank OZK		2,689		122,242
Blue Owl Capital, Inc.		4,070		76,760
BOK Financial Corp.		691		63,572
Brighthouse Financial, Inc. (c)		452		23,296
Citizens Financial Group, Inc.		10,157		368,597
CNA Financial Corp.		612		27,797
Columbia Banking System, Inc.		5,074		98,182
Comerica, Inc.		3,201		176,023
Commerce Bancshares, Inc.		1,230		65,436
Corebridge Financial, Inc.		3,610		103,715
Credit Acceptance Corp. (c)		152		83,836
Cullen/Frost Bankers, Inc.		724		81,501
Discover Financial Services		1,553		203,583
East West Bancorp, Inc.		3,422		270,714
Equitable Holdings, Inc.		6,204		235,814
Euronet Worldwide, Inc. (c)		949		104,324
Evercore, Inc. Class A		867		166,976
Everest Group Ltd.		478		190,005
Fidelity National Financial, Inc.		6,353		337,344
Fifth Third Bancorp		9,927		369,384
First American Financial Corp.		2,441		149,023
First Hawaiian, Inc.		3,104		68,164
First Horizon Corp.		12,998		200,169
FNB Corp.		8,725		123,022
Franklin Resources, Inc.		3,674		103,276
Globe Life, Inc.		976		113,577

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Hanover Insurance Group, Inc.		862	$	117,379
Hartford Financial Services Group, Inc.		2,076		213,932
Huntington Bancshares, Inc.		20,693		288,667
Interactive Brokers Group, Inc. Class A		2,431		271,567
Invesco Ltd.		7,711		127,925
Janus Henderson Group PLC		2,307		75,877
Jefferies Financial Group, Inc.		1,358		59,888
KeyCorp.		22,812		360,658
Lazard, Inc.		2,671		111,835
Lincoln National Corp.		4,124		131,679
Loews Corp.		3,151		246,692
LPL Financial Holdings, Inc.		421		111,228
M&T Bank Corp.		1,151		167,401
MGIC Investment Corp.		7,005		156,632
NCR Atleos Corp. (c)		1,557		30,751
New York Community Bancorp, Inc. (d)		8,748		28,169
Northern Trust Corp.		1,625		144,495
Old Republic International Corp.		6,611		203,090
OneMain Holdings, Inc.		2,735		139,731
Pinnacle Financial Partners, Inc.		1,836		157,676
Popular, Inc.		1,710		150,634
Primerica, Inc.		370		93,595
Principal Financial Group, Inc.		3,850		332,293
Prosperity Bancshares, Inc.		1,186		78,015
Regions Financial Corp.		9,318		196,051
Reinsurance Group of America, Inc.		1,479		285,269
Rithm Capital Corp.		11,716		130,751
RLI Corp.		397		58,943
Rocket Cos., Inc. Class A (c) (d)		3,054		44,436
Ryan Specialty Holdings, Inc.		630		34,965
SEI Investments Co.		655		47,094
SLM Corp.		3,690		80,405
Starwood Property Trust, Inc. (d)		5,382		109,416
State Street Corp.		2,872		222,063
Stifel Financial Corp.		2,497		195,190
Synchrony Financial		10,432		449,828
Synovus Financial Corp.		3,516		140,851
TPG, Inc.		1,566		70,000
Unum Group		4,779		256,441
UWM Holdings Corp.		2,265		16,444
Virtu Financial, Inc. Class A		2,180		44,734
Voya Financial, Inc.		2,384		176,225
W. R. Berkley Corp.		1,986		175,642
Webster Financial Corp.		4,223		214,402
Western Alliance Bancorp		2,630		168,820
Western Union Co.		9,132		127,665
WEX, Inc. (c)		366		86,936
Wintrust Financial Corp.		1,479		154,393
Zions Bancorp NA		3,538		153,549
				12,613,797
Health Care — 5.8%
Acadia Healthcare Co., Inc. (c)		764		60,524
Amedisys, Inc. (c)		743		68,475
Azenta, Inc. (c)		1,543		93,012
Cardinal Health, Inc.		2,962		331,448
Catalent, Inc. (c)		3,045		171,890
DaVita, Inc. (c)		1,318		181,950

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Elanco Animal Health, Inc. (c)		9,576	$	155,897
Encompass Health Corp.		1,826		150,791
Enovis Corp. (c)		1,280		79,936
Envista Holdings Corp. (c)		1,547		33,075
Henry Schein, Inc. (c)		2,206		166,597
Integra LifeSciences Holdings Corp. (c)		1,419		50,303
Jazz Pharmaceuticals PLC (c)		497		59,849
Maravai LifeSciences Holdings, Inc. Class A (c)		2,681		23,244
Molina Healthcare, Inc. (c)		760		312,231
Organon & Co.		6,235		117,218
Perrigo Co. PLC		1,523		49,025
Premier, Inc. Class A		2,894		63,957
Quest Diagnostics, Inc.		981		130,581
Quidelortho Corp. (c)		1,304		62,514
Tenet Healthcare Corp. (c)		2,458		258,360
United Therapeutics Corp. (c)		358		82,240
Universal Health Services, Inc. Class B		1,473		268,764
Viatris, Inc.		29,286		349,675
				3,321,556
Industrials — 18.9%
Acuity Brands, Inc.		769		206,653
Advanced Drainage Systems, Inc.		724		124,702
AECOM		1,529		149,964
AGCO Corp.		1,521		187,113
Air Lease Corp.		2,525		129,886
Alaska Air Group, Inc. (c)		3,067		131,850
Allison Transmission Holdings, Inc.		2,217		179,932
American Airlines Group, Inc. (c)		15,800		242,530
Ardagh Group SA (a) (b) (c) (d)		463		2,180
Armstrong World Industries, Inc.		840		104,345
Avis Budget Group, Inc.		500		61,230
Builders FirstSource, Inc. (c)		3,109		648,382
BWX Technologies, Inc.		780		80,044
C.H. Robinson Worldwide, Inc.		2,796		212,887
CACI International, Inc. Class A (c)		549		207,978
Carlisle Cos., Inc.		649		254,311
Clean Harbors, Inc. (c)		684		137,696
CNH Industrial NV		14,921		193,376
Concentrix Corp.		1,071		70,922
Core & Main, Inc. Class A (c)		2,069		118,450
Curtiss-Wright Corp.		347		88,811
Delta Air Lines, Inc.		7,734		370,227
Dun & Bradstreet Holdings, Inc.		6,648		66,746
EMCOR Group, Inc.		1,032		361,406
Esab Corp.		1,194		132,021
Expeditors International of Washington, Inc.		1,637		199,010
Flowserve Corp.		1,421		64,911
Fortune Brands Innovations, Inc.		3,080		260,784
Gates Industrial Corp. PLC (c)		2,890		51,182
Generac Holdings, Inc. (c)		514		64,836
Genpact Ltd.		2,308		76,049
GXO Logistics, Inc. (c)		2,626		141,174
Hayward Holdings, Inc. (c)		2,386		36,530
Hertz Global Holdings, Inc. (c)		3,282		25,698
Huntington Ingalls Industries, Inc.		954		278,062
ITT, Inc.		832		113,177
KBR, Inc.		2,351		149,665

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Kirby Corp. (c)		809	$	77,114
Knight-Swift Transportation Holdings, Inc.		3,799		209,021
Landstar System, Inc.		871		167,894
Leidos Holdings, Inc.		3,338		437,578
ManpowerGroup, Inc.		1,229		95,420
Masco Corp.		2,877		226,938
MasTec, Inc. (c)		694		64,715
MDU Resources Group, Inc.		4,931		124,261
Middleby Corp. (c)		580		93,258
MSC Industrial Direct Co., Inc. Class A		858		83,260
nVent Electric PLC		1,472		110,989
Oshkosh Corp.		1,584		197,541
Owens Corning		2,197		366,460
Regal Rexnord Corp.		626		112,743
Robert Half, Inc.		2,559		202,877
Ryder System, Inc.		1,118		134,372
Saia, Inc. (c)		214		125,190
Schneider National, Inc. Class B		1,337		30,270
Science Applications International Corp.		1,310		170,811
Sensata Technologies Holding PLC		2,102		77,227
SiteOne Landscape Supply, Inc. (c)		423		73,835
Southwest Airlines Co.		7,680		224,179
Stericycle, Inc. (c)		1,030		54,332
Textron, Inc.		3,073		294,793
Timken Co.		1,385		121,090
U-Haul Holding Co.		945		63,013
U-Haul Holding Co. (c) (d)		219		14,791
United Airlines Holdings, Inc. (c)		7,999		382,992
Valmont Industries, Inc.		317		72,365
Vestis Corp.		1,853		35,707
WESCO International, Inc.		1,076		184,297
XPO, Inc. (c)		2,787		340,098
				10,894,151
Information Technology — 6.7%
Arrow Electronics, Inc. (c)		1,394		180,467
Avnet, Inc.		2,224		110,266
Cirrus Logic, Inc. (c)		1,347		124,678
Coherent Corp. (c)		2,899		175,737
Crane NXT Co.		1,174		72,671
Dropbox, Inc. Class A (c)		6,367		154,718
DXC Technology Co. (c)		5,524		117,164
Gen Digital, Inc.		11,333		253,859
Hewlett Packard Enterprise Co.		31,598		560,233
HP, Inc.		13,098		395,822
Jabil, Inc.		3,165		423,952
Kyndryl Holdings, Inc. (c)		5,005		108,909
Littelfuse, Inc.		263		63,738
Lumentum Holdings, Inc. (c)		1,604		75,949
MKS Instruments, Inc.		879		116,907
NCR Voyix Corp. (c)		3,113		39,317
TD SYNNEX Corp.		1,014		114,684
Teradata Corp. (c)		1,666		64,424
Viasat, Inc. (c) (d)		1,756		31,766
Vontier Corp.		3,642		165,201
Western Digital Corp. (c)		7,809		532,886
				3,883,348

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Materials — 10.9%
Alcoa Corp.		4,339	$	146,615
Amcor PLC		13,058		124,182
Ardagh Metal Packaging SA		3,500		12,005
Ashland, Inc.		1,055		102,725
Avery Dennison Corp.		525		117,206
Axalta Coating Systems Ltd. (c)		2,298		79,028
Berry Global Group, Inc.		2,954		178,658
Celanese Corp.		2,289		393,388
CF Industries Holdings, Inc.		4,782		397,910
Chemours Co.		3,628		95,271
Cleveland-Cliffs, Inc. (c)		12,360		281,066
Crown Holdings, Inc.		2,581		204,570
Eagle Materials, Inc.		579		157,343
Eastman Chemical Co.		2,346		235,116
Element Solutions, Inc.		2,749		68,670
Graphic Packaging Holding Co.		7,405		216,078
Huntsman Corp.		4,262		110,940
International Paper Co.		8,485		331,085
Louisiana-Pacific Corp.		1,561		130,983
LyondellBasell Industries NV Class A		1,879		192,184
Mosaic Co.		8,052		261,368
MP Materials Corp. (c) (d)		1,458		20,849
NewMarket Corp.		96		60,924
Olin Corp.		3,147		185,044
Packaging Corp. of America		1,568		297,575
Reliance, Inc.		1,064		355,568
Sealed Air Corp.		3,496		130,051
Silgan Holdings, Inc.		2,039		99,014
Sonoco Products Co.		2,386		138,006
SSR Mining, Inc.		2,332		10,401
Steel Dynamics, Inc.		3,291		487,825
US Steel Corp.		5,470		223,067
Westlake Corp.		763		116,586
Westrock Co.		6,223		307,727
				6,269,028
Real Estate — 3.0%
Apartment Income REIT Corp.		3,618		117,476
Boston Properties, Inc.		3,816		249,223
Brixmor Property Group, Inc.		3,461		81,160
Cousins Properties, Inc.		2,941		70,702
EPR Properties		1,472		62,486
Highwoods Properties, Inc.		2,539		66,471
Host Hotels & Resorts, Inc.		6,195		128,113
Howard Hughes Holdings, Inc. (c)		545		39,578
Jones Lang LaSalle, Inc. (c)		1,155		225,329
Kilroy Realty Corp.		2,847		103,716
Medical Properties Trust, Inc. (d)		14,487		68,089
National Storage Affiliates Trust		1,306		51,143
Omega Healthcare Investors, Inc.		2,171		68,756
Park Hotels & Resorts, Inc.		5,361		93,764
Vornado Realty Trust		3,122		89,820
Zillow Group, Inc. Class A (c)		1,319		63,127
Zillow Group, Inc. Class C (c)		3,673		179,169
				1,758,122

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Utilities — 2.6%
AES Corp.		6,631	$	118,894
Brookfield Renewable Corp. Class A		3,102		76,216
Clearway Energy, Inc. Class A		846		18,197
Clearway Energy, Inc. Class C		1,999		46,077
Evergy, Inc.		1,993		106,386
Hawaiian Electric Industries, Inc.		2,674		30,136
IDACORP, Inc.		512		47,560
National Fuel Gas Co.		2,168		116,465
NiSource, Inc.		5,083		140,596
NRG Energy, Inc.		5,646		382,178
OGE Energy Corp.		4,197		143,957
Pinnacle West Capital Corp.		1,651		123,379
UGI Corp.		5,099		125,130
				1,475,171

TOTAL COMMON STOCK (Cost $51,318,332)				57,520,735

TOTAL EQUITIES (Cost $51,318,332)				57,520,735

TOTAL LONG-TERM INVESTMENTS (Cost $51,318,332)				57,520,735

SHORT-TERM INVESTMENTS — 0.2%
Investment of Cash Collateral from Securities Loaned — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		104,941		104,941

TOTAL SHORT-TERM INVESTMENTS (Cost $104,941)				104,941

TOTAL INVESTMENTS — 100.0% (Cost $51,423,273) (f)				57,625,676

Other Assets/(Liabilities) — (0.0)%				(5,887)

NET ASSETS — 100.0%			$	57,619,789

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Investment is valued using significant unobservable inputs.

(b)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2024, these securities amounted to a value of $2,180 or 0.00% of net assets.

(c)	Non-income producing security.

(d)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $357,918 or 0.62% of net assets. The Fund received $264,918 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(e)	Represents investment of security lending cash collateral. (Note 2).

(f)	See Note 3 for aggregate cost for federal tax purposes.

MML High Yield Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 96.2%

BANK LOANS — 9.1%
Aerospace & Defense — 0.3%
Barnes Group, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 2.500%
7.827% VRN 9/03/30	$	142,561	$	142,632
Building Materials — 0.1%
MI Windows and Doors, LLC, 2024 Term Loan B2,
0.000% 3/21/31 (a)		70,461		70,725
Chemicals — 1.5%
CPC Acquisition Corp., Term Loan, 3 mo. USD Term SOFR + 3.750%
9.321% VRN 12/29/27		223,834		188,132
LSF11 A5 Holdco LLC
Term Loan, 1 mo. USD Term SOFR + 3.500%
8.942% VRN 10/15/28		126,854		126,791
2023 Incremental Term Loan B, 1 mo. USD Term SOFR + 4.250%
9.677% VRN 10/15/28		272,336		272,472
PMHC II, Inc., 2022 Term Loan B, 3 mo. USD Term SOFR + 4.250%
9.723% VRN 4/23/29 (a)		157,128		155,391
				742,786
Commercial Services — 0.3%
APi Group DE, Inc., 2023 Incremental Term Loan, 1 mo. USD Term SOFR + 2.500%
7.942% VRN 1/03/29		153,640		153,864
Computers — 0.8%
McAfee LLC, 2022 USD Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.176% VRN 3/01/29		259,340		258,513
Vision Solutions, Inc., 2021 Incremental Term Loan, 3 mo. USD Term SOFR + 4.000%
9.586% VRN 4/24/28		167,337		167,198
				425,711
Diversified Financial Services — 0.5%
Aretec Group, Inc., 2023 Incremental Term Loan, 1 mo. USD Term SOFR + 4.500%
9.927% VRN 8/09/30		255,310		256,586
Engineering & Construction — 0.2%
Artera Services LLC, 2024 Term Loan, 3 mo. USD Term SOFR + 4.500%
9.809% VRN 2/15/31		127,547		127,930
Food — 0.7%
8th Avenue Food & Provisions, Inc., 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.750%
9.192% VRN 10/01/25		238,023		233,427

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Fiesta Purchaser, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 4.000%
9.327% VRN 2/12/31	$	109,461	$	109,583
				343,010
Gas — 0.3%
NGL Energy Partners LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 4.500%
9.830% VRN 2/02/31		179,279		179,638
Health Care – Services — 0.8%
Catalent Pharma Solutions, Inc., 2021 Term Loan B3, 1 mo. USD Term SOFR + 2.000%
7.443% VRN 2/22/28		226,728		226,444
LifePoint Health, Inc., 2023 Term Loan B, 3 mo. USD Term SOFR + 5.500%
11.087% VRN 11/16/28		113,952		114,216
Radiology Partners, Inc., 2024 Extended Term Loan B,
0.000% 1/31/29 (a)		52,889		50,981
				391,641
Lodging — 0.3%
Four Seasons Hotels Ltd., 2024 Term Loan B, 3 mo. USD Term SOFR + 2.000%
7.430% VRN 11/30/29		178,972		179,040
Media — 0.8%
A-L Parent LLC, 2023 Take Back Term Loan, 1 mo. USD Term SOFR + 5.500%
10.827% VRN 6/30/28		307,480		305,654
Sinclair Television Group, Inc., Term Loan B2B,
0.000% 9/30/26 (a)		83,094		78,752
				384,406
Packaging & Containers — 0.2%
Clydesdale Acquisition Holdings, Inc., Term Loan B, 1 mo. USD Term SOFR + 3.675%
9.105% VRN 4/13/29		94,287		94,384
Pipelines — 0.3%
ITT Holdings LLC, 2023 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.677% VRN 10/05/30		148,941		149,016
Software — 2.0%
Banff Merger Sub, Inc., 2023 USD Term Loan, 1 mo. USD Term SOFR + 4.250%
9.580% VRN 12/29/28 (a)		501,083		503,904
Cloud Software Group, Inc., 2022 USD Term Loan B,
0.000% 3/30/29 (a)		255,000		253,651
UKG, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.500%
8.814% VRN 2/10/31		199,793		200,742
Veritas US, Inc., 2021 USD Term Loan B, 1 mo. USD Term SOFR + 5.000%
10.445% VRN 9/01/25		56,195		51,855
				1,010,152

TOTAL BANK LOANS (Cost $4,596,160)				4,651,521

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
CORPORATE DEBT — 87.1%
Advertising — 0.8%
Clear Channel Outdoor Holdings, Inc.
9.000% 9/15/28 (b)	$	92,000	$	95,829
7.500% 6/01/29 (b)		61,000		50,449
7.875% 4/01/30 (b)		47,000		46,725
Stagwell Global LLC
5.625% 8/15/29 (b)		220,000		199,784
				392,787
Aerospace & Defense — 0.9%
Spirit AeroSystems, Inc.
9.750% 11/15/30 (b)		278,000		310,962
Triumph Group, Inc.
9.000% 3/15/28 (b)		148,000		156,026
				466,988
Agriculture — 0.3%
Darling Ingredients, Inc.
6.000% 6/15/30 (b)		130,000		128,830
Airlines — 2.6%
Allegiant Travel Co.
7.250% 8/15/27 (b)		334,000		332,222
American Airlines, Inc.
8.500% 5/15/29 (b)		195,000		206,009
American Airlines, Inc./AAdvantage Loyalty IP Ltd.
5.500% 4/20/26 (b)		401,250		398,518
Hawaiian Brand Intellectual Property Ltd./HawaiianMiles Loyalty Ltd.
5.750% 1/20/26 (b)		271,022		254,342
United Airlines, Inc.
4.375% 4/15/26 (b)		122,000		117,942
				1,309,033
Auto Manufacturers — 0.4%
JB Poindexter & Co., Inc.
8.750% 12/15/31 (b)		172,000		177,785
Auto Parts & Equipment — 0.5%
Adient Global Holdings Ltd.
4.875% 8/15/26 (b)		277,000		270,042
Building Materials — 2.6%
EMRLD Borrower LP/Emerald Co.-Issuer, Inc.
6.625% 12/15/30 (b)		326,000		329,127
Knife River Corp.
7.750% 5/01/31 (b)		152,000		159,121
New Enterprise Stone & Lime Co., Inc.
9.750% 7/15/28 (b)		602,000		615,891
Smyrna Ready Mix Concrete LLC
8.875% 11/15/31 (b)		211,000		225,536
				1,329,675

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Chemicals — 3.6%
Consolidated Energy Finance SA
5.625% 10/15/28 (b)	$	595,000	$	499,348
LSF11 A5 HoldCo LLC
6.625% 10/15/29 (b)		294,000		264,729
Methanex Corp.
5.125% 10/15/27		144,000		139,281
Olympus Water US Holding Corp.
4.250% 10/01/28 (b)		326,000		295,761
6.250% 10/01/29 (b) (c)		459,000		420,121
Polar US Borrower LLC/Schenectady International Group, Inc.
6.750% 5/15/26 (b)		171,000		40,185
Vibrantz Technologies, Inc.
9.000% 2/15/30 (b) (c)		178,000		164,382
				1,823,807
Coal — 0.6%
Coronado Finance Pty. Ltd.
10.750% 5/15/26 (b)		290,000		302,144
Commercial Services — 2.8%
Alta Equipment Group, Inc.
5.625% 4/15/26 (b)		378,000		369,499
PECF USS Intermediate Holding III Corp.
8.000% 11/15/29 (b)		77,000		40,441
Prime Security Services Borrower LLC/Prime Finance, Inc.
6.250% 1/15/28 (b)		367,000		359,505
PROG Holdings, Inc.
6.000% 11/15/29 (b)		339,000		316,841
Sabre GLBL, Inc.
8.625% 6/01/27 (b)		358,000		314,153
Sabre Global, Inc., Convertible,
7.320% 8/01/26		10,000		8,620
				1,409,059
Computers — 0.5%
Presidio Holdings, Inc.
8.250% 2/01/28 (b)		137,000		136,630
Western Digital Corp.
4.750% 2/15/26		133,000		129,926
				266,556
Distribution & Wholesale — 0.4%
Resideo Funding, Inc.
4.000% 9/01/29 (b)		243,000		217,274
Diversified Financial Services — 6.4%
Aretec Group, Inc.
10.000% 8/15/30 (b)		144,000		157,287
Coinbase Global, Inc.
3.375% 10/01/28 (b)		38,000		32,559
3.625% 10/01/31 (b)		50,000		40,378
GGAM Finance Ltd.
8.000% 2/15/27 (b)		248,000		256,065
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (b)		696,839		662,784

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Jefferson Capital Holdings LLC
6.000% 8/15/26 (b)	$	380,000	$	372,866
9.500% 2/15/29 (b)		244,000		249,767
Macquarie Airfinance Holdings Ltd.
8.125% 3/30/29 (b)		119,000		125,857
8.375% 5/01/28 (b)		106,000		112,356
Midcap Financial Issuer Trust
5.625% 1/15/30 (b)		339,000		291,722
OneMain Finance Corp.
4.000% 9/15/30		107,000		91,576
5.375% 11/15/29		177,000		166,418
PRA Group, Inc.
5.000% 10/01/29 (b)		583,000		491,284
7.375% 9/01/25 (b)		231,000		230,589
				3,281,508
Electric — 2.9%
PG&E Corp.
5.000% 7/01/28		497,000		478,642
Pike Corp.
5.500% 9/01/28 (b)		593,000		567,587
8.625% 1/31/31 (b)		140,000		148,773
Talen Energy Supply LLC
8.625% 6/01/30 (b)		261,000		279,101
				1,474,103
Electrical Components & Equipment — 0.3%
Energizer Holdings, Inc.
4.375% 3/31/29 (b)		142,000		127,241
Electronics — 0.6%
Atkore, Inc.
4.250% 6/01/31 (b)		360,000		319,253
Engineering & Construction — 2.3%
Arcosa, Inc.
4.375% 4/15/29 (b)		230,000		211,953
Artera Services LLC
8.500% 2/15/31 (b)		123,000		126,105
Global Infrastructure Solutions, Inc.
5.625% 6/01/29 (b)		377,000		345,680
7.500% 4/15/32 (b)		140,000		136,957
MasTec, Inc.
4.500% 8/15/28 (b) (c)		235,000		223,455
Railworks Holdings LP/Railworks Rally, Inc.
8.250% 11/15/28 (b)		117,000		116,083
				1,160,233
Entertainment — 0.9%
Live Nation Entertainment, Inc.
4.750% 10/15/27 (b)		260,000		248,255
Midwest Gaming Borrower LLC/Midwest Gaming Finance Corp.
4.875% 5/01/29 (b)		136,000		125,930

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Ontario Gaming GTA LP/OTG Co.-Issuer, Inc.
8.000% 8/01/30 (b)	$	88,000	$	90,638
				464,823
Environmental Controls — 0.2%
Enviri Corp.
5.750% 7/31/27 (b)		116,000		109,223
Food — 1.5%
Fiesta Purchaser, Inc.
7.875% 3/01/31 (b)		78,000		80,550
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
3.625% 1/15/32		527,000		450,920
Pilgrim's Pride Corp.
4.250% 4/15/31 (b)		283,000		255,108
				786,578
Gas — 0.2%
AmeriGas Partners LP/AmeriGas Finance Corp.
9.375% 6/01/28 (b)		111,000		114,942
Hand & Machine Tools — 1.3%
Regal Rexnord Corp.
6.400% 4/15/33 (b)		650,000		674,132
Health Care – Products — 0.5%
Neogen Food Safety Corp.
8.625% 7/20/30 (b)		248,000		267,159
Health Care – Services — 4.8%
CHS/Community Health Systems, Inc.
4.750% 2/15/31 (b)		108,000		83,349
5.250% 5/15/30 (b)		422,000		344,104
6.000% 1/15/29 (b)		141,000		123,177
LifePoint Health, Inc.
9.875% 8/15/30 (b)		274,000		286,616
11.000% 10/15/30 (b)		129,000		137,874
Molina Healthcare, Inc.
4.375% 6/15/28 (b)		167,000		156,985
Radiology Partners, Inc.
8.500% 1/31/29 (b)		147,907		137,228
9.781% 2/15/30 (b)		515,306		414,821
RegionalCare Hospital Partners Holdings, Inc./LifePoint Health, Inc.
9.750% 12/01/26 (b)		299,000		299,402
Tenet Healthcare Corp.
4.375% 1/15/30		165,000		152,505
5.125% 11/01/27		179,000		175,085
6.125% 10/01/28 (c)		152,000		151,455
				2,462,601
Home Builders — 1.6%
Ashton Woods USA LLC/Ashton Woods Finance Co.
4.625% 8/01/29 (b)		183,000		168,802
Mattamy Group Corp.
4.625% 3/01/30 (b)		687,000		623,275
				792,077

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Housewares — 0.1%
Newell Brands, Inc.
6.375% 9/15/27	$	36,000	$	35,402
Insurance — 1.2%
Alliant Holdings Intermediate LLC/Alliant Holdings Co-Issuer
6.750% 4/15/28 (b)		128,000		128,904
7.000% 1/15/31 (b)		48,000		48,481
Highlands Holdings Bond Issuer Ltd./Highlands Holdings Bond Co.-Issuer, Inc.
7.625% 10/15/25 (b)		430,269		425,150
				602,535
Internet — 0.7%
Getty Images, Inc.
9.750% 3/01/27 (b)		367,000		366,804
Investment Companies — 1.3%
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
4.750% 9/15/24		178,000		177,180
6.250% 5/15/26		505,000		487,489
				664,669
Leisure Time — 2.9%
Carnival Corp.
5.750% 3/01/27 (b)		205,000		202,896
6.000% 5/01/29 (b)		288,000		284,172
7.000% 8/15/29 (b)		24,000		25,032
Life Time, Inc.
5.750% 1/15/26 (b)		24,000		23,805
NCL Corp. Ltd.
5.875% 3/15/26 (b)		118,000		116,484
5.875% 2/15/27 (b)		49,000		48,412
8.375% 2/01/28 (b)		100,000		105,632
NCL Finance Ltd.
6.125% 3/15/28 (b) (c)		94,000		92,827
Royal Caribbean Cruises Ltd.
5.500% 8/31/26 (b)		266,000		263,610
5.500% 4/01/28 (b)		121,000		119,597
Viking Cruises Ltd.
7.000% 2/15/29 (b)		175,000		175,757
				1,458,224
Lodging — 1.5%
Hilton Grand Vacations Borrower Escrow LLC/Hilton Grand Vacations Borrower Escrow, Inc.
4.875% 7/01/31 (b)		199,000		178,172
6.625% 1/15/32 (b)		117,000		117,472
Sugarhouse HSP Gaming Prop Mezz LP/Sugarhouse HSP Gaming Finance Corp.
5.875% 5/15/25 (b)		155,000		154,606
Travel & Leisure Co.
6.625% 7/31/26 (b)		213,000		214,490
Wyndham Hotels & Resorts, Inc.
4.375% 8/15/28 (b)		133,000		123,640
				788,380

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Media — 6.2%
Altice Financing SA
5.000% 1/15/28 (b)	$	152,000	$	125,103
5.750% 8/15/29 (b)		17,000		13,621
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 2/01/31 (b)		196,000		160,063
4.250% 1/15/34 (b)		486,000		366,859
4.500% 5/01/32		95,000		76,341
CSC Holdings LLC
5.750% 1/15/30 (b)		146,000		77,289
7.500% 4/01/28 (b)		75,000		50,554
11.750% 1/31/29 (b)		232,000		232,362
Cumulus Media New Holdings, Inc.
6.750% 7/01/26 (b)		126,000		67,393
Directv Financing LLC/Directv Financing Co.-Obligor, Inc.
5.875% 8/15/27 (b)		434,000		410,580
DISH DBS Corp.
5.125% 6/01/29		105,000		43,794
7.375% 7/01/28		78,000		37,551
DISH Network Corp.
11.750% 11/15/27 (b)		112,000		114,344
Gray Television, Inc.
5.375% 11/15/31 (b)		246,000		161,307
7.000% 5/15/27 (b) (c)		30,000		27,901
LCPR Senior Secured Financing DAC
6.750% 10/15/27 (b)		177,000		166,118
McGraw-Hill Education, Inc.
5.750% 8/01/28 (b)		112,000		105,499
Sirius XM Radio, Inc.
3.875% 9/01/31 (b)		76,000		63,370
Time Warner Cable Enterprises LLC
8.375% 7/15/33		343,000		382,818
Virgin Media Secured Finance PLC
4.500% 8/15/30 (b)		265,000		228,523
Virgin Media Vendor Financing Notes IV DAC
5.000% 7/15/28 (b)		277,000		254,142
				3,165,532
Mining — 1.2%
Constellium SE
3.750% 4/15/29 (b)		300,000		269,909
Novelis Corp.
3.250% 11/15/26 (b)		48,000		44,726
3.875% 8/15/31 (b)		341,000		292,921
				607,556
Miscellaneous - Manufacturing — 0.5%
Amsted Industries, Inc.
4.625% 5/15/30 (b)		64,000		58,448
5.625% 7/01/27 (b)		175,000		172,372
				230,820
Oil & Gas — 4.8%
Apache Corp.
4.750% 4/15/43 (c)		65,000		51,243
5.100% 9/01/40		130,000		111,562

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.350% 7/01/49	$	197,000	$	166,524
CVR Energy, Inc.
5.750% 2/15/28 (b)		134,000		125,657
Nabors Industries, Inc.
7.375% 5/15/27 (b)		87,000		86,840
Neptune Energy Bondco PLC
6.625% 5/15/25 (b)		594,000		593,993
Occidental Petroleum Corp.
6.200% 3/15/40		397,000		407,371
6.950% 7/01/24		42,000		42,062
Parkland Corp.
4.625% 5/01/30 (b)		105,000		96,799
5.875% 7/15/27 (b)		269,000		266,669
Sunoco LP/Sunoco Finance Corp.
6.000% 4/15/27		114,000		113,545
7.000% 9/15/28 (b)		67,000		68,457
Transocean Poseidon Ltd.
6.875% 2/01/27 (b)		19,575		19,598
Transocean, Inc.
7.250% 11/01/25 (b)		172,000		171,272
7.500% 1/15/26 (b)		140,000		139,124
				2,460,716
Oil & Gas Services — 0.5%
Weatherford International Ltd.
8.625% 4/30/30 (b)		243,000		253,684
Packaging & Containers — 2.8%
Ardagh Metal Packaging Finance USA LLC/Ardagh Metal Packaging Finance PLC
4.000% 9/01/29 (b)		157,000		126,550
Clydesdale Acquisition Holdings, Inc.
8.750% 4/15/30 (b)		272,000		267,251
Graham Packaging Co., Inc.
7.125% 8/15/28 (b)		209,000		189,499
Mauser Packaging Solutions Holding Co.
7.875% 8/15/26 (b)		312,000		317,850
9.250% 4/15/27 (b)		446,000		442,447
Trident TPI Holdings, Inc.
12.750% 12/31/28 (b)		72,000		76,820
				1,420,417
Pharmaceuticals — 3.8%
1375209 BC Ltd.
9.000% 1/30/28 (b)		535,000		524,302
AdaptHealth LLC
5.125% 3/01/30 (b)		365,000		318,330
Bausch Health Cos., Inc.
4.875% 6/01/28 (b)		215,000		117,326
5.500% 11/01/25 (b)		109,000		102,886
6.125% 2/01/27 (b)		59,000		36,762
14.000% 10/15/30 (b)		47,000		27,039
Grifols SA
4.750% 10/15/28 (b) (c)		293,000		242,417
Herbalife Ltd., Convertible,
4.250% 6/15/28 (b)		50,000		43,155

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Herbalife Nutrition Ltd./HLF Financing, Inc.
7.875% 9/01/25 (b)	$	268,000	$	267,963
HLF Financing SARL LLC/Herbalife International, Inc.
4.875% 6/01/29 (b)		31,000		21,545
Perrigo Finance Unlimited Co.
4.650% STEP 6/15/30		280,000		257,392
				1,959,117
Pipelines — 6.8%
CQP Holdco LP/BIP-V Chinook Holdco LLC
5.500% 6/15/31 (b)		565,000		533,991
Energy Transfer LP
5 yr. CMT + 5.694% 6.500% VRN (d)		100,000		98,014
5 yr. CMT + 5.306% 7.125% VRN (d)		89,000		86,890
EnLink Midstream Partners LP
5.450% 6/01/47		52,000		45,255
5.600% 4/01/44 (c)		257,000		228,820
EQM Midstream Partners LP
6.000% 7/01/25 (b)		67,000		67,085
6.375% 4/01/29 (b)		137,000		138,006
6.500% 7/01/27 (b)		151,000		152,335
Genesis Energy LP/Genesis Energy Finance Corp.
8.000% 1/15/27		300,000		303,488
8.250% 1/15/29		25,000		25,665
8.875% 4/15/30		105,000		109,909
Harvest Midstream I LP
7.500% 9/01/28 (b)		389,000		394,419
ITT Holdings LLC
6.500% 8/01/29 (b)		524,000		478,202
NGL Energy Operating LLC/NGL Energy Finance Corp.
8.125% 2/15/29 (b)		77,000		78,862
8.375% 2/15/32 (b)		137,000		140,440
Tallgrass Energy Partners LP/Tallgrass Energy Finance Corp.
7.375% 2/15/29 (b)		129,000		129,771
7.500% 10/01/25 (b)		171,000		171,685
Venture Global Calcasieu Pass LLC
3.875% 8/15/29 (b)		133,000		119,720
4.125% 8/15/31 (b)		152,000		135,158
				3,437,715
Private Equity — 0.2%
HAT Holdings I LLC/HAT Holdings II LLC
3.375% 6/15/26 (b)		105,000		98,900
Real Estate Investment Trusts (REITS) — 1.9%
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (b)		32,000		27,382
HAT Holdings I LLC/HAT Holdings II LLC
8.000% 6/15/27 (b)		56,000		58,391
RHP Hotel Properties LP/RHP Finance Corp.
6.500% 4/01/32 (b)		165,000		165,557
RLJ Lodging Trust LP
3.750% 7/01/26 (b)		107,000		101,897
4.000% 9/15/29 (b)		284,000		250,351
Service Properties Trust
4.375% 2/15/30		115,000		87,783

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
7.500% 9/15/25	$	267,000	$	270,599
				961,960
Retail — 3.8%
Bath & Body Works, Inc.
6.750% 7/01/36		97,000		97,971
6.875% 11/01/35		222,000		227,008
BlueLinx Holdings, Inc.
6.000% 11/15/29 (b)		221,000		214,646
Brinker International, Inc.
8.250% 7/15/30 (b)		127,000		133,829
CEC Entertainment LLC
6.750% 5/01/26 (b)		107,000		105,989
Nordstrom, Inc.
5.000% 1/15/44		93,000		72,070
PetSmart, Inc./PetSmart Finance Corp.
4.750% 2/15/28 (b)		78,000		73,027
7.750% 2/15/29 (b)		141,000		137,269
Raising Cane's Restaurants LLC
9.375% 5/01/29 (b)		39,000		42,149
Sonic Automotive, Inc.
4.875% 11/15/31 (b) (c)		174,000		152,322
Specialty Building Products Holdings LLC/SBP Finance Corp.
6.375% 9/30/26 (b)		155,000		153,961
Staples, Inc.
7.500% 4/15/26 (b)		152,000		148,348
10.750% 4/15/27 (b)		89,000		84,598
Suburban Propane Partners LP/Suburban Energy Finance Corp.
5.000% 6/01/31 (b)		192,000		175,043
Superior Plus LP/Superior General Partner, Inc.
4.500% 3/15/29 (b)		145,000		134,059
				1,952,289
Software — 1.0%
Consensus Cloud Solutions, Inc.
6.000% 10/15/26 (b) (c)		165,000		156,825
UKG, Inc.
6.875% 2/01/31 (b)		152,000		154,846
Veritas US, Inc./Veritas Bermuda Ltd.
7.500% 9/01/25 (b)		198,000		181,539
				493,210
Telecommunications — 5.1%
Altice France Holding SA
10.500% 5/15/27 (b)		74,000		27,689
Altice France SA
5.125% 7/15/29 (b)		10,000		6,760
C&W Senior Finance Ltd.
6.875% 9/15/27 (b)		267,000		252,152
Connect Finco SARL/Connect US Finco LLC
6.750% 10/01/26 (b)		570,000		558,757
Consolidated Communications, Inc.
5.000% 10/01/28 (b)		90,000		75,014
6.500% 10/01/28 (b)		91,000		79,491
Frontier Communications Holdings LLC
6.000% 1/15/30 (b)		964,000		816,534

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Intelsat Jackson Holdings SA
6.500% 3/15/30 (b)	$	158,000	$	146,793
Level 3 Financing, Inc.
4.250% 7/01/28 (b)		68,000		31,960
11.000% 11/15/29 (b)		463,000		481,520
Viasat, Inc.
6.500% 7/15/28 (b) (c)		175,000		135,138
				2,611,808
Transportation — 1.3%
Carriage Purchaser, Inc.
7.875% 10/15/29 (b)		191,000		169,700
Seaspan Corp.
5.500% 8/01/29 (b)		571,000		497,921
				667,621

TOTAL CORPORATE DEBT (Cost $45,674,019)				44,365,212

TOTAL BONDS & NOTES (Cost $50,270,179)				49,016,733

TOTAL LONG-TERM INVESTMENTS (Cost $50,270,179)				49,016,733

SHORT-TERM INVESTMENTS — 5.9%
Commercial Paper — 2.0%
Eversource Energy
5.681% 4/01/24 (b)		1,000,000		999,397
				999,397

	Number of Shares
Investment of Cash Collateral from Securities Loaned — 3.3%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		1,652,695		1,652,695

	Principal Amount
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (f)	$	292,504		292,504

TOTAL SHORT-TERM INVESTMENTS (Cost $2,945,199)				2,944,596

TOTAL INVESTMENTS — 102.1% (Cost $53,215,378) (g)				51,961,329

Other Assets/(Liabilities) — (2.1)%				(1,048,392)

NET ASSETS — 100.0%			$	50,912,937

Abbreviation Legend

CMT	Constant Maturity Treasury Index

SOFR	Secured Overnight Financing Rate

STEP	Step Coupon Bond

VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	All or a portion of the security represents unsettled bank loan commitments at March 31, 2024 where the rate will be determined at time of settlement.

(b)

(c)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $1,778,387 or 3.49% of net assets. The Fund received $164,007 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(d)	Security is perpetual and has no stated maturity date.

(e)	Represents investment of security lending cash collateral. (Note 2).

(f)	Maturity value of $292,556. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $298,414.

(g)	See Note 3 for aggregate cost for federal tax purposes.

MML Inflation-Protected and Income Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 83.1%

CORPORATE DEBT — 0.5%
Real Estate Investment Trusts (REITS) — 0.5%
SBA Tower Trust
2.836% 1/15/50 (a)	$	1,000,000	$	976,026

TOTAL CORPORATE DEBT (Cost $975,233)				976,026

NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 53.0%
Automobile Asset-Backed Securities — 11.9%
American Credit Acceptance Receivables Trust, Series 2021-2, Class E
2.540% 7/13/27 (a)		3,800,000		3,667,579
BOF URSA VI Funding Trust I, Series 2023-CAR1, Class A2
5.542% 10/27/31 (a)		900,855		896,294
Carvana Auto Receivables Trust, Series 2021-N3, Class B
0.660% 6/12/28		815,667		763,318
Drive Auto Receivables Trust
Series 2021-1, Class C, 1.020% 6/15/27		31,906		31,844
Series 2021-1, Class D, 1.450% 1/16/29		4,500,000		4,361,202
Series 2021-3, Class C, 1.470% 1/15/27		1,618,951		1,594,293
Exeter Automobile Receivables Trust
Series 2020-2A, Class D, 4.730% 4/15/26 (a)		331,523		330,471
Series 2023-5A, Class A2, 6.200% 4/15/26		588,787		589,703
Flagship Credit Auto Trust, Series 2021-2, Class C
1.270% 6/15/27 (a)		4,000,000		3,827,670
Ford Credit Auto Owner Trust, Series 2018-1, Class C
3.490% 7/15/31 (a)		2,000,000		1,959,320
OneMain Direct Auto Receivables Trust, Series 2022-1A, Class C
5.310% 6/14/29 (a)		800,000		764,140
Westlake Automobile Receivables Trust
Series 2020-3A, Class D, 1.650% 2/17/26 (a)		1,555,943		1,540,052

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2023-4A, Class A2, 6.230% 1/15/27 (a)	$	1,200,000	$	1,204,409
				21,530,295
Commercial Mortgage-Backed Securities — 7.4%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD Term SOFR + 1.797%
7.122% FRN 7/15/35 (a)		1,000,000		995,122
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD Term SOFR + 2.047%
7.373% FRN 12/15/37 (a)		308,865		308,672
COMM Mortgage Trust, Series 2015-LC19, Class D
2.867% 2/10/48 (a)		1,700,000		1,498,060
Credit Suisse Mortgage Capital Certificates
Series 2019-ICE4, Class D, 1 mo. USD Term SOFR + 1.647% 6.973% FRN 5/15/36 (a)		3,990,073		3,986,334
Series 2019-ICE4, Class E, 1 mo. USD Term SOFR + 2.197% 7.523% FRN 5/15/36 (a)		2,493,796		2,490,679
Extended Stay America Trust
Series 2021-ESH, Class D, 1 mo. USD Term SOFR + 2.364% 7.690% FRN 7/15/38 (a)		822,830		821,801
Series 2021-ESH, Class F, 1 mo. USD Term SOFR + 3.814% 9.140% FRN 7/15/38 (a)		1,097,107		1,095,735
KREF Ltd., Series 2021-FL2, Class D, 1 mo. USD Term SOFR + 2.314%
7.640% FRN 2/15/39 (a)		700,000		624,591
Ready Capital Mortgage Financing LLC, Series 2023-FL12, Class A, 1 mo. USD Term SOFR + 2.335%
7.664% FRN 5/25/38 (a)		1,604,690		1,606,694
				13,427,688
Home Equity Asset-Backed Securities — 0.9%
Home Equity Asset Trust, Series 2005-9, Class M1, 1 mo. USD Term SOFR + 0.729%
6.059% FRN 4/25/36		1,002,556		976,125
JP Morgan Mortgage Acquisition Trust, Series 2007-CH3, Class A5, 1 mo. USD Term SOFR + 0.374%
5.704% FRN 3/25/37		133,374		129,766
Residential Asset Securities Corporation Trust, Series 2005-EMX1, Class M1, 1 mo. USD Term SOFR + 0.759%
6.089% FRN 3/25/35		63,361		63,273
Structured Asset Securities Corp. Mortgage Loan Trust

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2006-BC6, Class A4, 1 mo. USD Term SOFR + 0.284% 5.614% FRN 1/25/37	$	115,139	$	113,304
Series 2006-WF1, Class M4, 1 mo. USD Term SOFR + 0.759% 6.089% FRN 2/25/36		51,080		51,002
Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314% 6.644% FRN 11/25/35 (a)		302,158		297,671
				1,631,141
Other Asset-Backed Securities — 17.3%
321 Henderson Receivables I LLC, Series 2006-3A, Class A1, 1 mo. USD Term SOFR + 0.314%
5.640% FRN 9/15/41 (a)		43,544		42,985
ACHV ABS Trust
Series 2024-1PL, Class A, 5.900% 4/25/31 (a)		1,800,000		1,799,963
Series 2023-4CP, Class A, 6.810% 11/25/30 (a)		481,996		482,675
Series 2023-4CP, Class B, 7.240% 11/25/30 (a)		500,000		504,098
Affirm Asset Securitization Trust
Series 2021-Z1, Class A, 1.070% 8/15/25 (a)		140,803		139,761
Series 2021-Z2, Class A, 1.170% 11/16/26 (a)		237,559		236,855
Series 2022-X1, Class A, 1.750% 2/15/27 (a)		207,660		204,796
Series 2022-Z1, Class A, 4.550% 6/15/27 (a)		198,105		196,477
Series 2023-X1, Class A, 7.110% 11/15/28 (a)		3,542,411		3,559,259
BHG Securitization Trust
Series 2021-B, Class A, 0.900% 10/17/34 (a)		371,332		362,190
Series 2021-A, Class A, 1.420% 11/17/33 (a)		1,432,624		1,366,756
Series 2022-C, Class A, 5.320% 10/17/35 (a)		1,105,234		1,099,937
Series 2023-A, Class A, 5.550% 4/17/36 (a)		1,120,073		1,113,254
Conn's Receivables Funding LLC, Series 2024-A, Class A
7.050% 1/16/29 (a)		1,704,075		1,706,816
Elara HGV Timeshare Issuer LLC, Series 2017-A, Class C
3.310% 3/25/30 (a)		103,544		103,292
FCI Funding LLC
Series 2021-1A, Class A, 1.130% 4/15/33 (a)		312,818		309,807
Series 2021-1A, Class B, 1.530% 4/15/33 (a)		208,570		206,393
FNA VI LLC, Series 2021-1A, Class A
1.350% 1/10/32 (a)		1,963,480		1,811,285
Hilton Grand Vacations Trust, Series 2022-2A, Class C
5.570% 1/25/37 (a)		441,675		433,508
Marlette Funding Trust, Series 2023-2A, Class A
6.040% 6/15/33 (a)		481,472		481,810
MVW Owner Trust, Series 2018-1A, Class A
3.450% 1/21/36 (a)		221,817		220,106

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
NP SPE II LLC, Series 2019-1A, Class A1
2.574% 9/20/49 (a)	$	127,508	$	122,362
Pagaya AI Debt Trust, Series 2022-1, Class A
2.030% 10/15/29 (a)		1,537,992		1,522,713
PFS Financing Corp.
Series 2021-B, Class B, 1.090% 8/15/26 (a)		1,300,000		1,274,545
Series 2022-A, Class B, 2.770% 2/15/27 (a)		800,000		777,455
PVONE 2023-1, LLC, Series 2023-2A, Class A
7.670% 9/17/35 (a)		1,084,710		1,093,107
RAM, Series 2024-1, Class A, Series 2024-1, Class A
6.669% 2/15/39 (a) (b) (c)		3,133,055		3,133,055
Reach Financial LLC, Series 2023-1A, Class A
7.050% 2/18/31 (a)		2,121,023		2,126,767
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		2,390,000		2,362,754
Sierra Timeshare Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		418,388		408,162
Series 2019-2A, Class C, 3.120% 5/20/36 (a)		713,779		703,567
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		248,558		242,108
Trafigura Securitisation Finance PLC, Series 2021-1A, Class B
1.780% 1/15/25 (a)		1,200,000		1,158,762
				31,307,380
Student Loans Asset-Backed Securities — 5.3%
Commonbond Student Loan Trust
Series 2021-AGS, Class B, 1.400% 3/25/52 (a)		114,374		85,022
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		13,372		11,698
Edsouth Indenture No. 9 LLC, Series 2015-1, Class A, 30 day USD SOFR Average + 0.914%
6.235% FRN 10/25/56 (a)		165,922		163,346
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD Term SOFR + 0.864%
6.194% FRN 8/25/42 (a)		73,559		73,111
Goal Capital Funding Trust, Series 2010-1, Class A, 90 day USD SOFR Average + 0.962%
6.320% FRN 8/25/48 (a)		54,991		54,989
JP Morgan Student Loan Trust, Series 2007-A, Class B, 90 day USD SOFR Average + 0.612%
5.973% FRN 6/28/39 (a)		263,727		236,494
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		60,094		57,943
Navient Private Education Refi Loan Trust

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-A, Class A, 0.840% 5/15/69 (a)	$	1,564,780	$	1,368,568
Series 2020-HA, Class A, 1.310% 1/15/69 (a)		254,672		232,704
Navient Student Loan Trust, Series 2017-1A, Class A3, 30 day USD SOFR Average + 1.264%
6.585% FRN 7/26/66 (a)		281,397		283,468
Nelnet Student Loan Trust
Series 2005-2, Class B, 90 day USD SOFR Average + 0.432% 5.785% FRN 3/23/37		854,830		812,138
Series 2006-2, Class B, 90 day USD SOFR Average + 0.462% 5.823% FRN 1/25/38		436,227		370,073
Series 2006-3, Class B, 90 day USD SOFR Average + 0.512% 5.865% FRN 6/25/41		146,968		129,299
Series 2004-3, Class B, 90 day USD SOFR Average + 0.612% 5.973% FRN 10/25/40		870,503		788,857
Series 2014-2A, Class B, 30 day USD SOFR Average + 1.614% 6.935% FRN 6/25/41 (a)		375,000		361,164
SLC Student Loan Trust
Series 2006-2, Class B, 90 day USD SOFR Average + 0.492% 5.845% FRN 12/15/39		629,113		554,896
Series 2005-2, Class B, 90 day USD SOFR Average + 0.542% 5.895% FRN 3/15/40		940,913		859,415
SLM Student Loan Trust
Series 2006-4, Class B, 90 day USD SOFR Average + 0.462% 5.823% FRN 1/25/70		199,472		186,079
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.833% FRN 10/25/40		281,809		263,764
Series 2006-2, Class B, 90 day USD SOFR Average + 0.482% 5.843% FRN 1/25/41		283,922		264,893
Series 2005-8, Class B, 90 day USD SOFR Average + 0.572% 5.933% FRN 1/25/55		252,933		239,756
Series 2004-8, Class B, 90 day USD SOFR Average + 0.722% 6.083% FRN 1/25/40		263,016		235,914
Series 2004-3, Class B, 90 day USD SOFR Average + 0.732% 6.093% FRN 10/25/64		157,930		149,058
Series 2003-11, Class B, 90 day USD SOFR Average + 0.912% 6.265% FRN 12/15/38		222,371		212,988
SMB Private Education Loan Trust
Series 2018-B, Class A2B, 1 mo. USD Term SOFR + 0.834% 6.160% FRN 1/15/37 (a)		429,100		426,595
Series 2019-A, Class A2B, 1 mo. USD Term SOFR + 0.984% 6.310% FRN 7/15/36 (a)		590,204		585,696
Series 2014-A, Class A3, 1 mo. USD Term SOFR + 1.614% 6.940% FRN 4/15/32 (a)		47,237		47,249

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
SoFi Alternative Trust, Series 2019-C, Class PT,
5.370% VRN 1/25/45 (a) (d)	$	466,749	$	449,281
				9,504,458
Whole Loan Collateral Collateralized Mortgage Obligations — 10.2%
Angel Oak Mortgage Trust
Series 2020-6, Class A1, 1.261% VRN 5/25/65 (a) (d)		834,999		725,928
Series 2022-2, Class A1, 3.353% VRN 1/25/67 (a) (d)		1,824,492		1,678,885
Cascade Funding Mortgage Trust, Series 2021-EBO1, Class A,
0.985% VRN 11/25/50 (a) (d)		477,722		451,942
CIM Trust, Series 2019-INV3, Class A11, 30 day USD SOFR Average + 1.064%
5.500% FRN 8/25/49 (a)		748,639		714,406
COLT Mortgage Loan Trust, Series 2022-1, Class A1,
2.284% VRN 12/27/66 (a) (d)		5,971,457		5,236,234
First Franklin Mortgage Loan Trust, Series 2006-FF15, Class A5, 1 mo. USD Term SOFR + 0.274%
5.604% FRN 11/25/36		208,471		203,623
NewRez Warehouse Securitization Trust, Series 2021-1, Class A, 1 mo. USD Term SOFR + 0.864%
6.194% FRN 5/25/55 (a)		4,044,733		4,045,552
OBX Trust
Series 2021-NQM2, Class A2, 1.357% VRN 5/25/61 (a) (d)		1,217,608		971,655
Series 2020-EXP1, Class 2A2, 1 mo. USD Term SOFR + 1.064% 6.394% FRN 2/25/60 (a)		304,668		291,090
PSMC Trust, Series 2020-2, Class A2,
3.000% VRN 5/25/50 (a) (d)		632,180		554,693
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (d)		2,475,519		2,164,585
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (d)		807,233		775,431
Verus Securitization Trust
Series 2021-3, Class A3, 1.437% VRN 6/25/66 (a) (d)		672,251		562,164
Series 2019-INV2, Class A3, 4.219% VRN 7/25/59 (a) (d)		167,348		163,467
				18,539,655

TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $98,195,467)				95,940,617

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Government Agency Obligations and Instrumentalities (e) — 10.6%
Pass-Through Securities — 0.0%
Federal Home Loan Mortgage Corp. Pool #1Q0239 1 yr. CMT + 2.159% 6.377% FRN 3/01/37	$	68,367	$	68,937
Whole Loans — 10.6%
Federal Home Loan Mortgage Corp. STACR REMICS Trust
Series 2021-DNA6, Class M1, 30 day USD SOFR Average + 0.800% 6.120% FRN 10/25/41 (a)		2,768,912		2,768,736
Series 2021-HQA3, Class M1, 30 day USD SOFR Average + 0.850% 6.170% FRN 9/25/41 (a)		5,220,172		5,195,446
Series 2021-DNA7, Class M1, 30 day USD SOFR Average + 0.850% 6.170% FRN 11/25/41 (a)		1,629,537		1,628,230
Series 2022-DNA2, Class M1A, 30 day USD SOFR Average + 1.300% 6.620% FRN 2/25/42 (a)		1,725,561		1,729,563
Series 2020-DNA1, Class M2, 30 day USD SOFR Average + 1.814% 7.135% FRN 1/25/50 (a)		548,335		552,168
Series 2022-DNA3, Class M1A, 30 day USD SOFR Average + 2.000% 7.320% FRN 4/25/42 (a)		1,478,302		1,498,067
Series 2018-DNA3, Class M2A, 30 day USD SOFR Average + 2.214% 7.535% FRN 9/25/48 (a)		293,224		295,105
Series 2022-DNA5, Class M1A, 30 day USD SOFR Average + 2.950% 8.270% FRN 6/25/42 (a)		462,010		475,361
Federal National Mortgage Association Connecticut Avenue Securities
Series 2022-R05, Class 2M1, 30 day USD SOFR Average + 1.900% 7.220% FRN 4/25/42 (a)		963,939		970,198
Series 2023-R05, Class 1M1, 30 day USD SOFR Average + 1.900% 7.221% FRN 6/25/43 (a)		927,830		937,532
Series 2023-R03, Class 2M1, 30 day USD SOFR Average + 2.500% 7.820% FRN 4/25/43 (a)		886,605		903,587
Series 2022-R07, Class 1M1, 30 day USD SOFR Average + 2.950% 8.271% FRN 6/25/42 (a)		2,078,737		2,137,994
				19,091,987

TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $19,100,656)				19,160,924

U.S. TREASURY OBLIGATIONS — 19.0%
U.S. Treasury Bonds & Notes — 19.0%
U.S. Treasury Inflation-Indexed Bonds

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
0.125% 2/15/51	$	473,764	$	283,083
0.125% 2/15/52		609,252		358,280
0.250% 2/15/50		719,646		454,120
0.625% 2/15/43		268,246		205,867
0.750% 2/15/42		805,161		642,282
0.750% 2/15/45		988,673		758,340
0.875% 2/15/47		574,844		443,052
1.000% 2/15/46		455,494		364,497
1.000% 2/15/48		437,668		344,515
1.000% 2/15/49		306,360		239,949
1.375% 2/15/44		860,022		753,976
1.500% 2/15/53		570,554		497,972
2.125% 2/15/40		428,007		433,069
2.125% 2/15/41		281,622		285,186
2.125% 2/15/54		351,666		355,340
2.500% 1/15/29		359,063		368,852
3.375% 4/15/32		434,315		481,032
3.875% 4/15/29		1,519,366		1,661,077
U.S. Treasury Inflation-Indexed Notes
0.125% 4/15/25		1,790,715		1,746,346
0.125% 1/15/30		1,618,016		1,464,578
0.125% 7/15/30		1,383,117		1,245,971
0.125% 1/15/31		1,368,178		1,217,146
0.125% 7/15/31		1,553,202		1,374,089
0.125% 1/15/32		1,446,133		1,263,234
0.250% 7/15/29		1,832,375		1,689,502
0.375% 7/15/27		1,197,561		1,139,477
0.500% 1/15/28		1,775,185		1,679,648
0.625% 7/15/32		2,016,489		1,828,456
0.750% 7/15/28 (f)		1,504,864		1,437,581
0.875% 1/15/29		366,369		349,223
1.125% 1/15/33		1,863,378		1,747,498
1.250% 4/15/28		1,727,124		1,677,730
1.375% 7/15/33		1,979,894		1,900,062
1.625% 10/15/27		1,686,355		1,670,095
1.750% 1/15/34		351,106		346,609

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2.375% 10/15/28	$	1,610,816	$	1,648,133
				34,355,867

TOTAL U.S. TREASURY OBLIGATIONS (Cost $36,963,761)				34,355,867

TOTAL BONDS & NOTES (Cost $155,235,117)				150,433,434

TOTAL LONG-TERM INVESTMENTS (Cost $155,235,117)				150,433,434

SHORT-TERM INVESTMENTS — 16.3%
Commercial Paper — 14.9%
American Honda Finance Corp.
5.620% 4/03/24		3,000,000		2,997,296
Avangrid, Inc.
5.573% 4/08/24 (a)		3,000,000		2,994,870
CRH America Finance, Inc.
5.671% 4/29/24 (a)		3,000,000		2,985,168
CVS Health Corp.
5.659% 4/03/24 (a)		3,000,000		2,997,301
Dominion Energy, Inc.
5.638% 4/10/24 (a)		3,000,000		2,994,102
Entergy Corp.
5.769% 4/22/24 (a)		3,000,000		2,988,464
Fortive Corp.
5.604% 4/08/24 (a)		3,000,000		2,995,002
L3Harris Technologies, Inc.
5.917% 4/17/24 (a)		3,000,000		2,990,865
Spire, Inc.
5.628% 4/22/24 (a)		3,000,000		2,988,476
				26,931,544
Repurchase Agreement — 1.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (g)		2,647,925		2,647,925

TOTAL SHORT-TERM INVESTMENTS (Cost $29,595,535)				29,579,469

MML Inflation-Protected and Income Fund — Portfolio of Investments (Continued)

	Principal Amount	Value
TOTAL INVESTMENTS — 99.4% (Cost $184,830,652) (h)		$	180,012,903

Other Assets/(Liabilities) — 0.6%			1,045,106

NET ASSETS — 100.0%		$	181,058,009

Abbreviation Legend

CMT	Constant Maturity Treasury Index

FRN	Floating Rate Note

ICE	Inter-Continental Exchange

REMICS

Real Estate Mortgage Investment Conduits

SOFR	Secured Overnight Financing Rate

STEP	Step Coupon Bond

VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)

(b)	Investment is valued using significant unobservable inputs.

(c)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2024, these securities amounted to a value of $3,133,055 or 1.73% of net assets.

(d)

(e)	May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(f)	All or a portion of this security is pledged/held as collateral for open derivatives.

(g)	Maturity value of $2,648,396. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $2,700,937.

(h)	See Note 3 for aggregate cost for federal tax purposes.

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Ultra 10 Year	6/18/24		1	$	114,643	$	(34)
U.S. Treasury Ultra Bond	6/18/24		1		128,003		997
						$	963
Short
U.S. Treasury Long Bond	6/18/24		3	$	(357,249)	$	(4,064)
U.S. Treasury Note 2 Year	6/28/24		210		(42,976,037)		34,318
U.S. Treasury Note 5 Year	6/28/24		40		(4,285,485)		4,860
						$	35,114

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
12-Month USD SOFR	Annually		Fixed 4.706%		Annually		11/07/25	USD	10,000,000	$	(2,672)	$	—	$	(2,672)
Fixed 2.114%	Maturity		U.S. Consumer Price Index		Maturity		1/04/26	USD	3,500,000		22,076		—		22,076
12-Month USD SOFR	Annually		Fixed 4.077%		Annually		2/02/26	USD	10,000,000		(91,697)		—		(91,697)
12-Month USD SOFR	Annually		Fixed 4.213%		Annually		2/06/26	USD	10,000,000		(67,315)		—		(67,315)
Fixed 2.490%	Maturity		U.S. Consumer Price Index		Maturity		7/31/26	USD	4,000,000		10,598		—		10,598
Fixed 2.482%	Maturity		U.S. Consumer Price Index		Maturity		9/07/26	USD	2,000,000		3,607		—		3,607
										$	(125,403)	$	—	$	(125,403)

OTC Total Return Swaps

Paid by the Fund

Received by the Fund

Rate/
Reference

Frequency

Rate/ Reference

Frequency

Counterparty

Termination Date

No. of Contracts/
Notional

Value

Upfront Premium Paid/ (Received)

Unrealized
Appreciation
(Depreciation)

Fed Funds
+ 23.0 BP

Maturity

Bloomberg US Treasury Inflation Notes TR Index

Maturity

BNP Paribas SA

5/31/24

USD

29,863,762

778,362

—

778,362

Fed Funds
+ 18.0 BP

Maturity

Bloomberg US Treasury Inflation Notes TR Index

Maturity

BNP Paribas SA

7/31/24

USD

36,351,911

299,149

—

299,149

Fed Funds
+ 22.0 BP

Maturity

Bloomberg US Treasury Inflation Notes TR Index

Maturity

Goldman Sachs International

4/30/24

USD

36,682,467

1,975,784

—

1,975,784

Fed Funds
+ 20.0 BP

Maturity

Bloomberg US Treasury Inflation Notes TR Index

Maturity

Goldman Sachs International

8/30/24

USD

30,584,877

251,691

—

251,691

3,304,986

—

3,304,986

Currency Legend

USD	U.S. Dollar

MML iShares 60/40 Allocation Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EXCHANGE-TRADED FUNDS — 102.2%
iShares 1-5 Year Investment Grade Corporate Bond ETF		41,649	$	2,135,761
iShares 20+ Year Treasury Bond ETF		9,030		854,419
iShares Broad USD High Yield Corporate Bond ETF		11,663		426,749
iShares Core Dividend Growth ETF		22,161		1,286,668
iShares Core International Aggregate Bond ETF		4,278		213,686
iShares Core MSCI Emerging Markets ETF		16,637		858,469
iShares Core MSCI International Developed Markets ETF		82,627		5,546,750
iShares Core S&P 500 ETF		7,320		3,848,343
iShares Core S&P Mid-Cap ETF		14,116		857,406
iShares Core S&P Total US Stock Market ETF		114,987		13,258,001
iShares Core U.S. Aggregate Bond ETF		137,366		13,453,626

TOTAL EXCHANGE-TRADED FUNDS (Cost $40,700,194)				42,739,878

TOTAL LONG-TERM INVESTMENTS (Cost $40,700,194)				42,739,878

SHORT-TERM INVESTMENTS — 3.1%

	Principal Amount
Repurchase Agreement — 3.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (a)	$	1,309,702		1,309,702

TOTAL SHORT-TERM INVESTMENTS (Cost $1,309,702)				1,309,702

TOTAL INVESTMENTS — 105.3% (Cost $42,009,896) (b)				44,049,580

Other Assets/(Liabilities) — (5.3)%				(2,232,928)

NET ASSETS — 100.0%			$	41,816,652

Abbreviation Legend

ETF	Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Maturity value of $1,309,935. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $1,335,923.

(b)	See Note 3 for aggregate cost for federal tax purposes.

MML iShares 80/20 Allocation Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EXCHANGE-TRADED FUNDS — 99.9%
iShares 1-5 Year Investment Grade Corporate Bond ETF		67,852	$	3,479,451
iShares 20+ Year Treasury Bond ETF		7,413		701,418
iShares Broad USD High Yield Corporate Bond ETF		19,064		697,552
iShares Core Dividend Growth ETF		36,532		2,121,048
iShares Core International Aggregate Bond ETF		13,960		697,302
iShares Core MSCI Emerging Markets ETF		67,787		3,497,809
iShares Core MSCI International Developed Markets ETF (a)		156,034		10,474,562
iShares Core S&P 500 ETF		10,669		5,609,013
iShares Core S&P Mid-Cap ETF		46,673		2,834,918
iShares Core S&P Total US Stock Market ETF		274,013		31,593,699
iShares Core U.S. Aggregate Bond ETF		85,505		8,374,360

TOTAL EXCHANGE-TRADED FUNDS (Cost $62,511,707)				70,081,132

TOTAL LONG-TERM INVESTMENTS (Cost $62,511,707)				70,081,132

SHORT-TERM INVESTMENTS — 0.3%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (b)		47,950		47,950

	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (c)	$	141,907		141,907

TOTAL SHORT-TERM INVESTMENTS (Cost $189,857)				189,857

TOTAL INVESTMENTS — 100.2% (Cost $62,701,564) (d)				70,270,989

Other Assets/(Liabilities) — (0.2)%				(112,326)

NET ASSETS — 100.0%			$	70,158,663

Abbreviation Legend

ETF	Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $46,991 or 0.07% of net assets. (Note 2).

(b)	Represents investment of security lending cash collateral. (Note 2).

(c)	Maturity value of $141,932. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $144,838.

(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Managed Bond Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.1%

CORPORATE DEBT — 38.3%
Aerospace & Defense — 0.1%
Boeing Co.
5.930% 5/01/60	$	605,000	$	567,209
Agriculture — 0.3%
Reynolds American, Inc.
5.850% 8/15/45		985,000		913,633
Viterra Finance BV
3.200% 4/21/31 (a)		1,315,000		1,138,389
				2,052,022
Airlines — 0.2%
Spirit Airlines Pass-Through Trust, Series 2015-1A, Class A,
4.100% 10/01/29		1,101,122		1,009,977
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		276,698		266,968
				1,276,945
Auto Manufacturers — 0.7%
Ford Motor Credit Co. LLC
5.800% 3/05/27		1,276,000		1,280,719
General Motors Co.
5.150% 4/01/38		800,000		750,897
General Motors Financial Co., Inc.
3.100% 1/12/32		750,000		635,250
5.400% 5/08/27		337,000		337,881
Hyundai Capital America
1.650% 9/17/26 (a)		1,425,000		1,303,385
				4,308,132
Banks — 7.8%
AIB Group PLC Secured Overnight Financing Rate + 2.330%
6.608% VRN 9/13/29 (a)		1,576,000		1,642,924
Bank of America Corp.
5 yr. CMT + 1.200% 2.482% VRN 9/21/36		2,635,000		2,107,560
3 mo. USD Term SOFR + 1.302% 3.419% VRN 12/20/28		1,475,000		1,383,757
5 yr. CMT + 2.000% 3.846% VRN 3/08/37		2,145,000		1,896,324
3 mo. USD Term SOFR + 2.076% 4.244% VRN 4/24/38		1,150,000		1,034,478
Bank of Ireland Group PLC Secured Overnight Financing Rate + 1.620%
5.601% VRN 3/20/30 (a)		654,000		651,398
Bank of Montreal 5 yr. CMT + 2.979%
4.800% VRN (b)		1,475,000		1,441,402
Barclays PLC
5 yr. CMT + 5.867% 6.125% VRN (b)		1,300,000		1,254,670
5 yr. CMT + 5.431% 8.000% VRN (b)		1,382,000		1,379,152

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
BNP Paribas SA Secured Overnight Financing Rate + 1.590%
5.497% VRN 5/20/30 (a)	$	970,000	$	972,120
BPCE SA Secured Overnight Financing Rate + 1.730%
3.116% VRN 10/19/32 (a)		1,860,000		1,524,254
Citigroup, Inc. Secured Overnight Financing Rate + 3.813%
5.000% VRN (b)		1,155,000		1,147,864
Danske Bank AS 1 yr. CMT + 1.400%
5.705% VRN 3/01/30 (a)		582,000		585,718
Discover Bank 5 yr. USD Secured Overnight Financing Rate ICE Swap Rate + 1.730%
5.974% VRN 8/09/28		3,105,000		3,088,766
Goldman Sachs Group, Inc. Secured Overnight Financing Rate + 1.410%
3.102% VRN 2/24/33		1,500,000		1,282,869
HSBC Holdings PLC Secured Overnight Financing Rate + 1.285%
2.206% VRN 8/17/29		1,203,000		1,054,342
ING Groep NV
5 yr. USD Swap + 4.446% 6.500% VRN (b)		1,950,000		1,925,779
5 yr. USD ICE Swap + 4.204% 6.750% VRN (a) (b)		1,200,000		1,200,000
JP Morgan Chase & Co. 3 mo. USD Term SOFR + 2.515%
2.956% VRN 5/13/31		1,000,000		874,158
Lloyds Banking Group PLC
5 yr. USD Swap + 4.760% 7.500% VRN (b)		2,100,000		2,087,374
1 yr. CMT + 3.750% 7.953% VRN 11/15/33		1,030,000		1,159,661
5 yr. CMT + 3.913% 8.000% VRN (b)		975,000		981,694
Macquarie Bank Ltd. 5 yr. CMT + 1.700%
3.052% VRN 3/03/36 (a)		3,440,000		2,843,988
Morgan Stanley
Secured Overnight Financing Rate + 1.360% 2.484% VRN 9/16/36		1,270,000		1,004,423
Secured Overnight Financing Rate + 2.620% 5.297% VRN 4/20/37		2,320,000		2,225,806
National Australia Bank Ltd. 5 yr. CMT + 1.700%
3.347% VRN 1/12/37 (a)		2,960,000		2,503,489
NatWest Group PLC
5 yr. CMT + 2.100% 3.754% VRN 11/01/29		700,000		688,113
5 yr. CMT + 5.625% 6.000% VRN (b)		825,000		805,605
Societe Generale SA
1 yr. CMT + 1.300% 2.797% VRN 1/19/28 (a)		1,400,000		1,292,728
5 yr. USD ICE Swap + 5.873% 8.000% VRN (a) (b)		1,900,000		1,908,803
SVB Financial Group
4.250% (b) (c)		298,000		4,479
Swedbank AB 5 yr. CMT + 4.134%
5.625% VRN (a) (b)		1,200,000		1,192,500
Synovus Bank
5.625% 2/15/28		1,563,000		1,517,827
Toronto-Dominion Bank 5 yr. CMT + 4.075%
8.125% VRN 10/31/82		2,781,000		2,916,860
UBS Group AG 1 yr. CMT + 1.800%
6.246% VRN 9/22/29 (a)		788,000		812,988
				50,393,873
Beverages — 0.4%
Bacardi Ltd.
5.150% 5/15/38 (a)		450,000		427,936
Bacardi Ltd./Bacardi-Martini BV
5.900% 6/15/43 (a)		396,000		398,125
Molson Coors Beverage Co.
4.200% 7/15/46		1,859,000		1,553,337

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
5.000% 5/01/42	$	360,000	$	340,846
				2,720,244
Biotechnology — 0.3%
Amgen, Inc.
5.600% 3/02/43		982,000		999,111
5.750% 3/02/63		700,000		713,964
				1,713,075
Chemicals — 0.3%
Dow Chemical Co.
5.600% 2/15/54		700,000		697,237
LYB International Finance III LLC
4.200% 5/01/50		1,475,000		1,153,812
				1,851,049
Computers — 0.1%
Kyndryl Holdings, Inc.
6.350% 2/20/34		568,000		583,030
Diversified Financial Services — 3.4%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.300% 1/30/32		1,965,000		1,685,295
Antares Holdings LP
2.750% 1/15/27 (a)		1,275,000		1,142,250
3.950% 7/15/26 (a)		3,005,000		2,824,041
8.500% 5/18/25 (a)		720,000		732,388
ARES Finance Co. III LLC 5 yr. CMT + 3.237%
4.125% VRN 6/30/51 (a)		1,585,000		1,470,472
ARES Finance Co. LLC
4.000% 10/08/24 (a)		2,080,000		2,046,254
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (a)		2,755,000		2,450,271
3.250% 2/15/27 (a)		1,610,000		1,495,175
4.250% 4/15/26 (a)		1,976,000		1,907,081
Blue Owl Finance LLC
3.125% 6/10/31 (a)		1,195,000		1,000,568
4.125% 10/07/51 (a)		1,089,000		744,623
Charles Schwab Corp.
5 yr. CMT + 3.168% 4.000% VRN (b)		2,000,000		1,871,147
Secured Overnight Financing Rate + 2.500% 5.853% VRN 5/19/34		921,000		943,148
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (a)		1,556,651		1,480,575
				21,793,288
Electric — 1.7%
CMS Energy Corp.
4.875% 3/01/44		780,000		724,568
Dominion Energy South Carolina, Inc.
6.250% 10/15/53		239,000		267,544
Dominion Energy, Inc.
5.950% 6/15/35		650,000		669,154
Duke Energy Florida LLC
6.200% 11/15/53		660,000		727,642
Emera, Inc. 3 mo. USD LIBOR + 5.440%
6.750% VRN 6/15/76		1,625,000		1,604,889

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Entergy Texas, Inc.
5.800% 9/01/53	$	1,185,000	$	1,223,342
Indianapolis Power & Light Co.
5.700% 4/01/54 (a)		358,000		358,949
IPALCO Enterprises, Inc.
5.750% 4/01/34 (a)		547,000		545,265
MidAmerican Energy Co.
5.300% 2/01/55		492,000		486,686
NextEra Energy Capital Holdings, Inc. 5 yr. CMT + 2.547%
3.800% VRN 3/15/82		1,250,000		1,134,039
Pacific Gas & Electric Co.
2.500% 2/01/31		775,000		644,473
Sempra
5 yr. CMT + 2.868% 4.125% VRN 4/01/52		1,025,000		945,610
6.000% 10/15/39		166,000		169,058
Tampa Electric Co.
4.450% 6/15/49		450,000		385,396
Virginia Electric & Power Co.
5.350% 1/15/54		931,000		912,581
				10,799,196
Entertainment — 0.2%
Warnermedia Holdings, Inc.
4.279% 3/15/32		1,275,000		1,138,879
Food — 0.7%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
3.625% 1/15/32		2,300,000		1,967,961
Smithfield Foods, Inc.
2.625% 9/13/31 (a)		1,730,000		1,354,796
3.000% 10/15/30 (a)		943,000		780,670
4.250% 2/01/27 (a)		800,000		768,234
				4,871,661
Gas — 0.3%
CenterPoint Energy Resources Corp.
6.625% 11/01/37		1,250,000		1,361,026
NiSource, Inc.
5.800% 2/01/42		950,000		925,506
				2,286,532
Hand & Machine Tools — 0.3%
Regal Rexnord Corp.
6.050% 4/15/28 (a)		1,860,000		1,885,600
Health Care – Services — 0.5%
City of Hope
4.378% 8/15/48		1,050,000		863,807
HCA, Inc.
5.900% 6/01/53		1,470,000		1,478,117
Humana, Inc.
5.750% 4/15/54		808,000		813,265
				3,155,189

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Insurance — 7.0%
Allianz SE 5 yr. CMT + 2.973%
3.500% VRN (a) (b)	$	4,200,000	$	3,895,512
Allstate Corp., (Acquired 11/30/18, Cost $2,909,256) 3 mo. USD Term SOFR + 3.200%
8.507% VRN 8/15/53 (d)		2,885,000		2,885,854
Arthur J Gallagher & Co.
5.750% 7/15/54		565,000		565,774
Ascot Group Ltd.
4.250% 12/15/30 (a)		1,990,000		1,636,352
Athene Global Funding
2.673% 6/07/31 (a)		2,505,000		2,075,222
5.684% 2/23/26 (a)		1,815,000		1,821,753
AXIS Specialty Finance LLC 5 yr. CMT + 3.186%
4.900% VRN 1/15/40		1,315,000		1,172,926
Brighthouse Financial, Inc.
4.700% 6/22/47		1,350,000		1,070,521
CNO Global Funding
2.650% 1/06/29 (a)		1,376,000		1,198,193
Corebridge Financial, Inc. 5 yr. CMT + 3.846%
6.875% VRN 12/15/52		3,281,000		3,284,932
Enstar Finance LLC
HYB, 5 yr. CMT + 4.006% 5.500% VRN 1/15/42		1,110,000		1,034,063
5 yr. CMT + 5.468% 5.750% VRN 9/01/40		2,200,000		2,133,790
Equitable Holdings, Inc. 5 yr. CMT + 4.736%
4.950% VRN (b)		885,000		864,901
Global Atlantic Fin Co.
3.125% 6/15/31 (a)		3,312,000		2,742,801
5 yr. CMT + 3.796% 4.700% VRN 10/15/51 (a)		3,060,000		2,757,745
6.750% 3/15/54 (a)		408,000		418,532
Hanwha Life Insurance Co. Ltd. 5 yr. CMT + 1.850%
3.379% VRN 2/04/32 (a)		2,485,000		2,303,077
Hill City Funding Trust
4.046% 8/15/41 (a)		3,800,000		2,772,180
Liberty Mutual Group, Inc. 5 yr. CMT + 3.315%
4.125% VRN 12/15/51 (a)		1,381,000		1,246,700
MetLife Capital Trust IV
7.875% 12/15/67 (a)		725,000		777,292
Sammons Financial Group, Inc.
3.350% 4/16/31 (a)		3,805,000		3,106,986
4.450% 5/12/27 (a)		270,000		257,395
4.750% 4/08/32 (a)		805,000		707,813
6.875% 4/15/34 (a)		626,000		630,273
USF&G Capital I
8.500% 12/15/45 (a)		885,000		1,001,928
Vitality Re XV Ltd. 3 mo. U.S. Treasury Bill Rate + 2.500%
7.862% FRN 1/08/29 (a)		3,016,000		3,011,778
				45,374,293
Investment Companies — 2.0%
ARES Capital Corp.
2.150% 7/15/26		1,850,000		1,703,535
5.875% 3/01/29		990,000		987,039
BlackRock TCP Capital Corp.
3.900% 8/23/24		1,316,000		1,303,693
Blackstone Private Credit Fund
2.625% 12/15/26		3,425,000		3,125,047

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Blue Owl Credit Income Corp.
4.700% 2/08/27	$	1,945,000	$	1,845,157
Blue Owl Technology Finance Corp. II
6.750% 4/04/29 (a) (e)		1,295,000		1,278,936
Golub Capital BDC, Inc.
2.500% 8/24/26		880,000		808,527
6.000% 7/15/29		1,322,000		1,298,362
HPS Corporate Lending Fund
6.750% 1/30/29 (a)		623,000		621,859
				12,972,155
Media — 1.1%
CCO Holdings LLC/CCO Holdings Capital Corp.
5.125% 5/01/27 (a)		975,000		928,952
Charter Communications Operating LLC/Charter Communications Operating Capital
2.300% 2/01/32		1,250,000		964,385
6.484% 10/23/45		1,485,000		1,376,332
Discovery Communications LLC
4.000% 9/15/55		1,210,000		828,089
Paramount Global
5 yr. CMT + 3.999% 6.375% VRN 3/30/62		1,100,000		1,016,372
6.875% 4/30/36		1,100,000		1,038,914
Time Warner Cable LLC
6.750% 6/15/39		985,000		938,183
				7,091,227
Oil & Gas — 2.0%
BP Capital Markets PLC
5 yr. CMT + 4.398% 4.875% VRN (b)		1,475,000		1,407,180
5 yr. CMT + 2.153% 6.450% VRN (b)		663,000		686,596
EQT Corp.
3.900% 10/01/27		835,000		793,696
7.000% STEP 2/01/30 (f)		1,795,000		1,907,091
Ovintiv, Inc.
6.500% 8/15/34		1,050,000		1,113,829
6.500% 2/01/38		545,000		567,768
7.100% 7/15/53		1,403,000		1,569,725
Patterson-UTI Energy, Inc.
3.950% 2/01/28		2,435,000		2,301,373
5.150% 11/15/29 (f)		1,225,000		1,198,558
Petroleos Mexicanos
5.350% 2/12/28		665,000		589,113
6.375% 1/23/45		595,000		383,652
6.500% 3/13/27		585,000		551,010
6.625% 6/15/35		140,000		106,208
				13,175,799
Oil & Gas Services — 0.2%
Nov, Inc.
3.950% 12/01/42		1,506,000		1,148,481
Pharmaceuticals — 1.1%
AbbVie, Inc.
4.700% 5/14/45		860,000		804,181
Cigna Group
4.800% 7/15/46		880,000		799,939

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
CVS Health Corp.
5.050% 3/25/48	$	455,000	$	413,221
5.875% 6/01/53		1,050,000		1,068,174
6.125% 9/15/39		560,000		579,556
CVS Pass-Through Trust
5.926% 1/10/34 (a)		847,690		832,303
7.507% 1/10/32 (a)		688,995		713,307
Utah Acquisition Sub, Inc.
5.250% 6/15/46		2,325,000		1,928,856
				7,139,537
Pipelines — 1.4%
Cheniere Energy, Inc.
5.650% 4/15/34 (a)		432,000		435,085
Energy Transfer LP
5.950% 5/15/54		660,000		658,644
3 mo. USD Term SOFR + 4.290% 9.597% VRN (b)		2,370,000		2,359,919
EnLink Midstream Partners LP
5.450% 6/01/47		1,125,000		979,065
Enterprise Products Operating LLC 3 mo. USD Term SOFR + 3.295%
5.250% VRN 8/16/77		1,250,000		1,186,132
Plains All American Pipeline LP 3 mo. USD Term SOFR + 4.372%
9.679% VRN (b)		2,345,000		2,330,172
Plains All American Pipeline LP/PAA Finance Corp.
4.700% 6/15/44		1,195,000		1,014,268
				8,963,285
Private Equity — 0.6%
Apollo Management Holdings LP 5 yr. CMT + 3.266%
4.950% VRN 1/14/50 (a)		1,505,000		1,424,022
Brookfield Finance, Inc.
5.968% 3/04/54		1,371,000		1,418,168
KKR Group Finance Co. VIII LLC
3.500% 8/25/50 (a)		710,000		498,721
KKR Group Finance Co. X LLC
3.250% 12/15/51 (a)		1,271,000		855,087
				4,195,998
Real Estate — 0.1%
CBRE Services, Inc.
5.500% 4/01/29		604,000		607,647
Real Estate Investment Trusts (REITS) — 2.9%
Broadstone Net Lease LLC
2.600% 9/15/31		2,120,000		1,675,148
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		2,625,000		2,246,179
GLP Capital LP/GLP Financing II, Inc.
5.750% 6/01/28		1,050,000		1,050,776
Kimco Realty OP LLC
4.125% 12/01/46		460,000		352,093
4.450% 9/01/47		800,000		651,063
Omega Healthcare Investors, Inc.
3.375% 2/01/31		1,625,000		1,387,039
3.625% 10/01/29		650,000		580,199
4.500% 4/01/27		608,000		588,377

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Piedmont Operating Partnership LP
2.750% 4/01/32	$	1,035,000	$	743,759
9.250% 7/20/28		772,000		822,108
Rexford Industrial Realty LP
2.125% 12/01/30		1,137,000		929,328
Service Properties Trust
4.950% 10/01/29		1,155,000		945,567
Store Capital LLC
4.500% 3/15/28		2,075,000		1,966,701
4.625% 3/15/29		1,700,000		1,601,618
VICI Properties LP/VICI Note Co., Inc.
3.750% 2/15/27 (a)		900,000		852,976
WEA Finance LLC
2.875% 1/15/27 (a)		2,420,000		2,213,143
				18,606,074
Retail — 0.0%
Alimentation Couche-Tard, Inc.
5.617% 2/12/54 (a)		196,000		197,839
Software — 0.5%
Electronic Arts, Inc.
2.950% 2/15/51		1,100,000		735,298
Microsoft Corp.
2.921% 3/17/52		2,064,000		1,459,196
Oracle Corp.
6.900% 11/09/52		712,000		819,265
				3,013,759
Telecommunications — 1.4%
AT&T, Inc.
3.550% 9/15/55		3,953,000		2,764,038
British Telecommunications PLC
9.625% STEP 12/15/30		1,280,000		1,570,087
Cisco Systems, Inc.
5.300% 2/26/54		248,000		254,568
Motorola Solutions, Inc.
5.400% 4/15/34		722,000		720,574
Sprint Capital Corp.
8.750% 3/15/32		1,250,000		1,515,690
T-Mobile USA, Inc.
6.000% 6/15/54		974,000		1,041,056
Vodafone Group PLC
4.250% 9/17/50		1,150,000		928,280
				8,794,293
Venture Capital — 0.7%
Hercules Capital, Inc.
2.625% 9/16/26		3,284,000		2,982,125
3.375% 1/20/27		1,745,000		1,602,505
				4,584,630

TOTAL CORPORATE DEBT (Cost $263,374,324)				247,260,941

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 22.8%
Commercial Mortgage-Backed Securities — 8.5%
Bank, Series 2020-BN30, Class MCDF,
2.918% VRN 12/15/53 (g)	$	2,100,000	$	1,163,582
Benchmark Mortgage Trust
Series 2021-B23, Class 360B, 2.760% VRN 2/15/54 (a) (g)		3,587,000		2,494,122
Series 2021-B23, Class 360A, 2.760% VRN 2/15/54 (a) (g)		2,200,000		1,657,249
Series 2021-B25, Class 300C, 2.994% VRN 4/15/54 (a) (g)		2,500,000		1,821,051
BGME Trust
Series 2021-VR, Class D, 2.995% VRN 1/10/43 (a) (g)		2,800,000		2,097,641
Series 2021-VR, Class C, 2.995% VRN 1/10/43 (a) (g)		12,518,000		9,836,984
BX Commercial Mortgage Trust, Series 2021-SOAR, Class E, 1 mo. USD Term SOFR + 1.914%
7.241% FRN 6/15/38 (a)		1,677,213		1,658,348
BX Trust, Series 2023-LIFE, Class C
5.884% 2/15/28 (a)		1,100,000		1,057,718
CARS-DB4 LP
Series 2020-1A, Class A3, 3.250% 2/15/50 (a)		452,479		396,709
Series 2020-1A, Class A6, 3.810% 2/15/50 (a)		392,445		334,363
COLEM Mortgage Trust, Series 2022-HLNE, Class D,
2.461% VRN 4/12/42 (a) (g)		1,600,000		1,280,374
COMM Mortgage Trust
Series 2012-CR4, Class B, 3.703% 10/15/45 (a)		1,060,000		643,560
Series 2015-CR23, Class C, 4.283% VRN 5/10/48 (g)		1,000,000		913,733
Series 2014-LC17, Class C, 4.537% VRN 10/10/47 (g)		2,908,000		2,764,351
DROP Mortgage Trust
Series 2021-FILE, Class C, 1 mo. USD Term SOFR + 2.364% 7.690% FRN 10/15/43 (a)		2,629,000		2,315,844
Series 2021-FILE, Class D, 1 mo. USD Term SOFR + 2.864% 8.190% FRN 10/15/43 (a)		908,000		718,183
Extended Stay America Trust, Series 2021-ESH, Class D, 1 mo. USD Term SOFR + 2.364%
7.690% FRN 7/15/38 (a)		1,828,511		1,826,225
KIND Trust, Series 2021-KIND, Class C, 1 mo. USD Term SOFR + 1.864%
7.195% FRN 8/15/38 (a)		1,586,968		1,524,935
KREF Ltd.
Series 2021-FL2, Class B, 1 mo. USD Term SOFR + 1.764% 7.090% FRN 2/15/39 (a)		2,900,000		2,749,661
Series 2021-FL2, Class C, 1 mo. USD Term SOFR + 2.114% 7.440% FRN 2/15/39 (a)		5,000,000		4,656,679
Series 2021-FL2, Class D, 1 mo. USD Term SOFR + 2.314% 7.640% FRN 2/15/39 (a)		4,100,000		3,658,319
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD Term SOFR + 1.864%
7.190% FRN 3/15/38 (a)		1,902,047		1,859,254
MFT Mortgage Trust
Series 2020-ABC, Class A, 3.358% 2/10/42 (a)		919,000		626,261
Series 2020-ABC, Class B, 3.477% VRN 2/10/42 (a) (g)		2,253,000		1,445,484
MHC Commercial Mortgage Trust, Series 2021-MHC, Class D, 1 mo. USD Term SOFR + 1.715%
7.040% FRN 4/15/38 (a)		1,342,203		1,332,136
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A5
3.390% 11/20/50 (a)		1,198,000		1,092,145
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD Term SOFR + 2.214%
7.541% FRN 7/15/39 (a)		3,761,000		2,544,081

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Wells Fargo Commercial Mortgage Trust, Series 2018-C45, Class B
4.556% 6/16/51	$	400,000	$	365,319
				54,834,311
Home Equity Asset-Backed Securities — 0.1%
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314%
6.644% FRN 11/25/35 (a)		854,379		841,690
Other Asset-Backed Securities — 9.3%
AASET Trust, Series 2021-2A, Class B
3.538% 1/15/47 (a)		857,087		721,195
Anchorage Capital CLO 19 Ltd., Series 2021-19A, Class A, 3 mo. USD Term SOFR + 1.472%
6.786% FRN 10/15/34 (a)		2,000,000		2,000,092
Apidos CLO XLIV Ltd., Series 2023-44A, Class B, 3 mo. USD Term SOFR + 2.550%
7.874% FRN 4/26/35 (a)		1,750,000		1,757,548
Atrium XV, Series 15A, Class B, 3 mo. USD Term SOFR + 2.012%
7.327% FRN 1/23/31 (a)		1,190,000		1,190,630
Bain Capital Credit CLO Ltd., Series 2022-1A, Class A1, 3 mo. USD Term SOFR + 1.320%
6.618% FRN 4/18/35 (a)		750,000		750,130
Business Jet Securities LLC
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		140,087		136,138
Series 2021-1A, Class C, 5.067% 4/15/36 (a)		412,125		396,285
Carlyle US CLO Ltd., Series 2021-6A, Class B, 3 mo. USD Term SOFR + 1.962%
7.276% FRN 7/15/34 (a)		1,400,000		1,400,189
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD Term SOFR + 1.242%
6.559% FRN 4/20/31 (a)		654,371		654,762
Diameter Capital CLO 2 Ltd., Series 2021-2A, Class A1, 3 mo. USD Term SOFR + 1.482%
6.796% FRN 10/15/36 (a)		2,000,000		2,000,384
Eaton Vance CLO Ltd.
Series 2020-2A, Class BR, 3 mo. USD Term SOFR + 1.962% 7.276% FRN 1/15/35 (a)		1,400,000		1,399,969
Series 2018-1A, Class B, 3 mo. USD Term SOFR + 2.012% 7.326% FRN 10/15/30 (a)		1,700,000		1,700,185
Series 2020-1A, Class CR, 3 mo. USD Term SOFR + 2.312% 7.626% FRN 10/15/34 (a)		350,000		349,985
Elmwood CLO III Ltd., Series 2019-3A, Class BR, 3 mo. USD Term SOFR + 1.912%
7.229% FRN 10/20/34 (a)		350,000		350,322
Flatiron CLO 20 Ltd., Series 2020-1A, Class BR, 3 mo. USD Term SOFR + 1.920%
7.220% FRN 5/20/36 (a) (e)		500,000		500,090
GoldenTree Loan Management US CLO 1 Ltd., Series 2021-11A, Class A, 3 mo. USD Term SOFR + 1.392%
6.709% FRN 10/20/34 (a)		1,000,000		1,000,518
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		1,482,702		1,251,684
Series 2017-1A, Class A, 3.740% 10/15/52 (a)		392,215		354,728
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		645,047		579,088
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD Term SOFR + 1.962%
7.279% FRN 1/20/31 (a)		1,290,000		1,290,141

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (a)	$	332,141	$	293,791
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		375,714		323,131
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		109,401		95,246
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		426,694		381,740
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		87,950		78,614
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		664,561		618,471
Invesco CLO Ltd., Series 2021-3A, Class B, 3 mo. USD Term SOFR + 1.912%
7.229% FRN 10/22/34 (a)		2,000,000		1,999,968
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (a)		1,604,719		1,429,162
Madison Park Funding XXIX Ltd., Series 2018-29A, Class C, 3 mo. USD Term SOFR + 2.462%
7.760% FRN 10/18/30 (a)		620,000		620,108
Madison Park Funding XXVIII Ltd., Series 2018-28A, Class B, 3 mo. USD Term SOFR + 1.862%
7.176% FRN 7/15/30 (a)		1,665,000		1,665,058
Madison Park Funding XXXII Ltd., Series 2018-32A, Class CR, 3 mo. USD Term SOFR + 2.262%
7.579% FRN 1/22/31 (a)		1,000,000		1,000,012
Mariner Finance Issuance Trust
Series 2021-AA, Class B, 2.330% 3/20/36 (a)		1,336,000		1,184,701
Series 2021-AA, Class C, 2.960% 3/20/36 (a)		637,000		550,453
MidOcean Credit CLO XII Ltd., Series 2023-12A, Class CR, 3 mo. USD Term SOFR + 2.450%
1.000% FRN 4/18/36 (a) (e)		700,000		700,123
MidOcean Credit CLO XIV Ltd., Series 2024-14A, Class A1, 3 mo. USD Term SOFR + 1.580%
6.878% FRN 4/15/37 (a)		1,000,000		1,000,675
Mosaic Solar Loan Trust, Series 2018-1A, Class A
4.010% 6/22/43 (a)		142,734		133,569
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (a)		128,878		123,735
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class BRR, 3 mo. USD Term SOFR + 1.912%
7.226% FRN 7/15/34 (a)		1,800,000		1,801,282
Neuberger Berman Loan Advisers CLO 45 Ltd., Series 2021-45A, Class B, 3 mo. USD Term SOFR + 1.912%
7.226% FRN 10/14/35 (a)		1,350,000		1,350,921
NP SPE II LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (a)		2,260,000		2,102,477
OCP CLO Ltd., Series 2018-15A, Class A1, 3 mo. USD Term SOFR + 1.362%
6.679% FRN 7/20/31 (a)		244,596		244,720
Oxford Finance Funding LLC, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		289,005		282,669
Parallel Ltd., Series 2021-2A, Class A2, 3 mo. USD Term SOFR + 2.112%
7.429% FRN 10/20/34 (a)		450,000		450,032
Rad CLO 12 Ltd., Series 2021-12A, Class A, 3 mo. USD Term SOFR + 1.432%
6.749% FRN 10/30/34 (a)		1,000,000		1,000,829
Rockford Tower CLO Ltd., Series 2019-1A, Class B1R, 3 mo. USD Term SOFR + 1.812%
7.129% FRN 4/20/34 (a)		1,500,000		1,483,912
RR 19 Ltd., Series 2021-19A, Class A1, 3 mo. USD Term SOFR + 1.402%
6.716% FRN 10/15/35 (a)		1,000,000		1,000,522

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD Term SOFR + 1.352%
6.666% FRN 1/15/30 (a)	$	1,787,868	$	1,788,143
RR 7 Ltd., Series 2019-7A, Class A2B, 3 mo. USD Term SOFR + 1.850%
7.167% FRN 1/15/37 (a)		750,000		749,977
RRX 6 Ltd., Series 2021-6A, Class A2, 3 mo. USD Term SOFR + 2.012%
7.326% FRN 1/15/37 (a)		500,000		500,027
Sierra Timeshare Receivables Funding LLC, Series 2021-1A, Class D
3.170% 11/20/37 (a)		430,483		400,340
Silver Point CLO 2 Ltd., Series 2023-2A, Class A1, 3 mo. USD Term SOFR + 2.250%
7.568% FRN 4/20/35 (a)		1,500,000		1,516,090
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (a)		38,572		37,887
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (a)		381,394		360,569
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (a)		1,628,422		1,484,384
Symphony CLO 42 Ltd., Series 2024-42A, Class A1, 3 mo. USD Term SOFR + 1.530%
6.837% FRN 4/17/37 (a)		2,000,000		1,999,244
THL Credit Wind River CLO Ltd., Series 2018-2A, Class B, 3 mo. USD Term SOFR + 2.012%
7.326% FRN 7/15/30 (a)		1,150,000		1,150,021
Thrust Engine Leasing DAC
Series 2021-1A, Class A, 4.163% 7/15/40 (a)		2,385,919		2,198,767
Series 2021-1A, Class B, 6.121% 7/15/40 (a)		1,139,871		1,038,822
Series 2021-1A, Class C, 7.386% 7/15/40 (a)		520,573		458,120
TICP CLO XIV Ltd., Series 2019-14A, Class A2R, 3 mo. USD Term SOFR + 1.912%
7.229% FRN 10/20/32 (a)		1,000,000		1,000,460
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370% 4/30/48 (a)		1,577,724		1,471,247
Voya CLO Ltd., Series 2021-3A, Class B, 3 mo. USD Term SOFR + 1.862%
7.179% FRN 1/20/35 (a)		500,000		496,395
WAVE Trust, Series 2017-1A, Class C
6.656% 11/15/42 (a)		2,312,635		464,864
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		492,386		469,992
Wind River CLO Ltd., Series 2016-2A, Class BR, 3 mo. USD Term SOFR + 2.062%
7.368% FRN 11/01/31 (a)		900,000		899,374
				60,184,707
Student Loans Asset-Backed Securities — 2.4%
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48 (a)		1,103,575		1,003,821
Series 2019-A, Class C, 4.460% 12/28/48 (a)		735,903		668,971
Edsouth Indenture No. 8 LLC, Series 2014-4, Class B, 30 day USD SOFR Average + 1.614%
6.935% FRN 6/25/48 (a)		1,200,000		1,185,214
Edsouth Indenture No. 9 LLC, Series 2015-1, Class B, 30 day USD SOFR Average + 1.614%
6.935% FRN 10/25/56 (a)		1,100,000		1,063,462
Educational Funding of the South, Inc., Series 2011-1, Class B, 90 day USD SOFR Average + 3.962%
9.323% FRN 4/25/46		625,000		625,143
EDvestinU Private Education Loan Issue No. 1 LLC, Series 2019-A, Class A
3.580% 11/25/38 (a)		452,646		429,104

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Higher Education Funding I
Series 2004-1, Class B1, 5.784% FRN 1/01/44 (a) (g)	$	450,000	$	387,302
Series 2004-1, Class B2, 5.793% FRN 1/01/44 (a) (g)		450,000		387,279
Nelnet Student Loan Trust
Series 2005-4, Class A4R1, 1.658% FRN 3/22/32 (g)		110,000		109,156
Series 2019-5, Class B, 3.450% 10/25/67 (a)		2,150,000		1,622,446
Series 2019-1A, Class B, 30 day USD SOFR Average + 1.514% 6.835% FRN 4/25/67 (a)		3,250,000		3,092,515
SLM Student Loan Trust
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.833% FRN 10/25/40		1,454,838		1,361,679
Series 2005-6, Class B, 90 day USD SOFR Average + 0.552% 5.913% FRN 1/25/44		1,069,190		1,012,298
SoFi Alternative Trust, Series 2019-C, Class PT,
5.370% VRN 1/25/45 (a) (g)		1,462,479		1,407,748
SoFi Professional Loan Program LLC, Series 2017-C, Class C,
4.210% VRN 7/25/40 (a) (g)		990,000		914,569
				15,270,707
Whole Loan Collateral Collateralized Mortgage Obligations — 2.3%
Banc of America Mortgage Trust, Series 2004-G, Class 2A7,
5.258% VRN 8/25/34 (g)		4,893		4,773
Credit Suisse Mortgage Trust, Series 2021-NQM3, Class M1,
2.317% VRN 4/25/66 (a) (g)		1,330,000		842,319
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (g)		3,531,037		2,801,105
GS Mortgage-Backed Securities Trust, Series 2021-GR2, Class A2,
2.500% VRN 2/25/52 (a) (g)		1,955,152		1,576,646
New Residential Mortgage Loan Trust, Series 2021-INV1, Class A4,
2.500% VRN 6/25/51 (a) (g)		2,291,760		1,816,578
NMLT Trust, Series 2021-INV1, Class M1,
2.711% VRN 5/25/56 (a) (g)		5,400,000		3,739,145
Starwood Mortgage Residential Trust, Series 2021-3, Class M1,
2.491% VRN 6/25/56 (a) (g)		2,448,000		1,660,617
Verus Securitization Trust, Series 2021-3, Class M1,
2.397% VRN 6/25/66 (a) (g)		3,640,000		2,442,079
Wells Fargo Mortgage-Backed Securities Trust, Series 2019-1, Class A1,
3.933% VRN 11/25/48 (a) (g)		32,762		30,664
				14,913,926
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.2%
GS Mortgage-Backed Securities Trust, Series 2021-GR2, Class A4,
2.500% VRN 2/25/52 (a) (g)		1,298,547		1,030,113

TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $168,401,690)				147,075,454

SOVEREIGN DEBT OBLIGATION — 0.2%
Mexico Government International Bond
4.750% 3/08/44		1,652,000		1,374,990

TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,645,806)				1,374,990

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (H) — 29.9%
Collateralized Mortgage Obligations — 0.0%
Federal Home Loan Mortgage Corp. REMICS Series 2178, Class PB 7.000% 8/15/29	$	10,562	$	10,880
Pass-Through Securities — 29.9%
Federal Home Loan Mortgage Corp.
Pool #RA4245 2.000% 12/01/50		2,020,070		1,620,594
Pool #RA4255 2.000% 1/01/51		4,113,213		3,308,808
Pool #RA5576 2.500% 7/01/51		7,331,910		6,147,948
Pool #SD0905 3.000% 3/01/52		3,189,317		2,762,201
Pool #J13972 3.500% 1/01/26		3,445		3,387
Pool #C91344 3.500% 11/01/30		31,186		30,008
Pool #C91424 3.500% 1/01/32		19,878		19,108
Pool #RA2483 3.500% 6/01/50		3,494,373		3,163,032
Pool #SD1523 4.000% 8/01/52		4,934,362		4,611,872
Pool #SD1603 4.000% 9/01/52		3,108,276		2,878,906
Pool #C91239 4.500% 3/01/29		1,390		1,372
Pool #C91251 4.500% 6/01/29		9,804		9,678
Pool #C90939 5.500% 12/01/25		2,783		2,774
Pool #C91026 5.500% 4/01/27		6,979		6,974
Pool #D97258 5.500% 4/01/27		1,211		1,210
Pool #C91074 5.500% 8/01/27		738		737
Pool #D97417 5.500% 10/01/27		5,190		5,196
Pool #C91128 5.500% 12/01/27		533		534
Pool #C91148 5.500% 1/01/28		16,502		16,512
Pool #C91176 5.500% 5/01/28		6,664		6,679
Pool #C91217 5.500% 11/01/28		2,728		2,733
Pool #SD4364 5.500% 10/01/53		5,400,309		5,402,502
Federal National Mortgage Association
Pool #CB0414 2.500% 5/01/51		6,030,175		5,028,151
Pool #FM8596 2.500% 9/01/51		1,930,613		1,618,253
Pool #FM9227 2.500% 10/01/51		4,111,940		3,440,231
Pool #FM9104 2.500% 10/01/51		5,612,890		4,701,254
Pool #FS3035 2.500% 4/01/52		8,574,350		7,192,436
Pool #MA3029 3.000% 6/01/32		923,324		875,593
Pool #MA3090 3.000% 8/01/32		378,931		358,634
Pool #AO8180 3.000% 9/01/42		9,138		8,231
Pool #AP8668 3.000% 12/01/42		70,407		63,354
Pool #AR1975 3.000% 12/01/42		13,132		11,832
Pool #AB7401 3.000% 12/01/42		47,316		42,637
Pool #AB7397 3.000% 12/01/42		58,358		52,544
Pool #AR0306 3.000% 1/01/43		3,693		3,326
Pool #AR5391 3.000% 1/01/43		15,273		13,730
Pool #AR4109 3.000% 2/01/43		51,644		46,434
Pool #AL3215 3.000% 2/01/43		45,495		40,943
Pool #AR4432 3.000% 3/01/43		21,612		19,437
Pool #AT0169 3.000% 3/01/43		107,079		96,264
Pool #MA1368 3.000% 3/01/43		89,652		80,662
Pool #AB8809 3.000% 3/01/43		23,938		21,553
Pool #AR2174 3.000% 4/01/43		88,944		79,968
Pool #FS1075 3.000% 3/01/52		3,273,780		2,853,717
Pool #CB3304 3.000% 4/01/52		5,014,306		4,370,913
Pool #CB3305 3.000% 4/01/52		6,011,758		5,232,866
Pool #AS1304 3.500% 12/01/28		302,048		293,038
Pool #MA1356 3.500% 2/01/43		3,288,750		3,016,588
Pool #CA6096 3.500% 6/01/50		3,894,640		3,508,307

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FM4017 3.500% 8/01/50	$	266,336	$	241,081
Pool #CB3842 3.500% 6/01/52		9,768,649		8,810,321
Pool #AA3980 4.500% 4/01/28		10,016		9,899
Pool #CA1909 4.500% 6/01/48		1,790,583		1,730,605
Pool #CB3866 4.500% 6/01/52		5,623,916		5,400,388
Pool #CB4129 4.500% 7/01/52		4,916,389		4,687,182
Pool #AD6437 5.000% 6/01/40		157,890		159,049
Pool #AD6996 5.000% 7/01/40		1,051,820		1,060,038
Pool #AL8173 5.000% 2/01/44		380,286		383,004
Pool #AD0836 5.500% 11/01/28		13,967		13,957
Government National Mortgage Association
Pool #491089 7.000% 12/15/28		1,340		1,339
Pool #480539 7.000% 4/15/29		51		52
Pool #500928 7.000% 5/15/29		2,031		2,070
Pool #488634 7.000% 5/15/29		1,134		1,151
Pool #510083 7.000% 7/15/29		104		106
Pool #493723 7.000% 8/15/29		1,534		1,566
Pool #581417 7.000% 7/15/32		2,670		2,709
Government National Mortgage Association II
Pool #MA6038 3.000% 7/20/49		1,894,347		1,685,272
Pool #MA6283 3.000% 11/20/49		3,433,021		3,051,980
Pool #MA6409 3.000% 1/20/50		3,543,023		3,149,773
Pool #MA4321 3.500% 3/20/47		2,109,337		1,943,124
Pool #8746 1 yr. CMT + 1.500% 3.750% FRN 11/20/25		503		495
Pool #80136 1 yr. CMT + 1.500% 3.750% FRN 11/20/27		214		209
Government National Mortgage Association II, TBA
2.500% 4/20/54 (e)		13,050,000		11,114,303
3.000% 4/20/54 (e)		9,125,000		8,048,419
3.500% 4/20/54 (e)		5,770,000		5,250,028
4.500% 4/20/54 (e)		2,000,000		1,921,617
Uniform Mortgage-Backed Security, TBA
2.000% 4/01/54 (e)		6,925,000		5,478,689
2.500% 4/01/54 (e)		14,750,000		12,192,374
3.000% 4/01/54 (e)		7,525,000		6,475,615
3.500% 4/01/54 (e)		2,000,000		1,789,453
4.000% 4/01/54 (e)		4,650,000		4,305,973
4.500% 4/01/54 (e)		1,975,000		1,880,648
5.000% 4/01/39 (e)		6,300,000		6,288,434
5.000% 4/01/54 (e)		10,300,000		10,052,961
5.500% 4/01/54 (e)		13,400,000		13,335,617
				193,543,162

TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $204,818,253)				193,554,042

U.S. TREASURY OBLIGATIONS — 7.9%
U.S. Treasury Bonds & Notes — 7.9%
U.S. Treasury Bonds
2.250% 8/15/49 (i)		14,200,000		9,468,830
U.S. Treasury Notes
0.250% 10/31/25		38,500,000		35,862,434

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
1.375% 10/31/28	$	6,300,000	$	5,550,652
				50,881,916

TOTAL U.S. TREASURY OBLIGATIONS (Cost $50,885,977)				50,881,916

TOTAL BONDS & NOTES (Cost $689,126,050)				640,147,343

TOTAL LONG-TERM INVESTMENTS (Cost $689,126,050)				640,147,343

SHORT-TERM INVESTMENTS — 14.6%
Commercial Paper — 14.2%
Amcor Flexibles North America, Inc.
5.588% 4/05/24 (a)		10,000,000		9,987,847
American Electric Power Co., Inc.
5.582% 4/08/24 (a)		7,000,000		6,988,338
American Honda Finance Corp.
5.620% 4/03/24		8,000,000		7,992,789
Avangrid, Inc.
5.600% 4/16/24 (a)		11,000,000		10,967,209
CRH America Finance, Inc.
5.630% 4/09/24 (a)		6,000,000		5,989,084
Dominion Energy, Inc.
5.638% 4/10/24 (a)		2,000,000		1,996,068
Fortive Corp.
5.604% 4/08/24 (a)		2,000,000		1,996,668
L3Harris Technologies, Inc.
5.917% 4/17/24 (a)		10,000,000		9,969,550
Mosaic Co.
5.633% 4/18/24 (a)		8,000,000		7,974,310
NextEra Energy Capital Holdings, Inc.
5.654% 4/08/24 (a)		3,000,000		2,994,997
NiSource, Inc.
5.620% 4/03/24 (a)		6,000,000		5,994,571
Nutrien Ltd.
5.618% 4/24/24 (a)		12,000,000		11,950,065
OGE Energy Corp.
5.657% 4/10/24 (a)		7,000,000		6,986,189
				91,787,685

	Number of Shares
Investment of Cash Collateral from Securities Loaned — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (j)		1,233,210		1,233,210

	Principal Amount
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (k)	$	1,143,258		1,143,258

TOTAL SHORT-TERM INVESTMENTS (Cost $94,219,562)				94,164,153

MML Managed Bond Fund — Portfolio of Investments (Continued)

	Principal Amount	Value
TOTAL INVESTMENTS — 113.7% (Cost $783,345,612) (l)		$	734,311,496

Other Assets/(Liabilities) — (13.7)%			(88,273,022)

NET ASSETS — 100.0%		$	646,038,474

Abbreviation Legend

CLO	Collateralized Loan Obligation

CMT	Constant Maturity Treasury Index

FRN	Floating Rate Note

ICE	Inter-Continental Exchange

LIBOR

London InterBank Offered Rate

REMICS

Real Estate Mortgage Investment Conduits

SOFR	Secured Overnight Financing Rate

STEP	Step Coupon Bond

TBA	To Be Announced

VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)

(b)	Security is perpetual and has no stated maturity date.

(c)	Security is currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At March 31, 2024, these securities amounted to a value of $4,479 or 0.00% of net assets.

(d)	Restricted security. Certain securities are restricted to resale. At March 31, 2024, these securities amounted to a value of $2,885,854 or 0.45% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(e)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.

(f)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $1,339,923 or 0.21% of net assets. The Fund received $133,908 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(g)

(h)	May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(i)	All or a portion of this security is pledged/held as collateral for open derivatives.

(j)	Represents investment of security lending cash collateral. (Note 2).

(k)	Maturity value of $1,143,462. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $1,166,209.

(l)	See Note 3 for aggregate cost for federal tax purposes.

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Long Bond	6/18/24		310	$	37,054,357	$	281,268
U.S. Treasury Ultra Bond	6/18/24		139		17,752,288		178,712
U.S. Treasury Note 2 Year	6/28/24		168		34,379,255		(25,880)
U.S. Treasury Note 5 Year	6/28/24		348		37,196,293		45,144
						$	479,244
Short
U.S. Treasury Ultra 10 Year	6/18/24		106	$	(12,148,473)	$	(119)

MML Short-Duration Bond Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 80.1%

CORPORATE DEBT — 44.8%
Agriculture — 0.3%
BAT Capital Corp.
4.700% 4/02/27	$	315,000	$	309,759
Apparel — 0.3%
Tapestry, Inc.
7.000% 11/27/26		297,000		306,006
Auto Manufacturers — 1.0%
General Motors Financial Co., Inc.
5.800% 1/07/29		305,000		310,373
Hyundai Capital America
6.100% 9/21/28 (a)		305,000		314,212
Nissan Motor Acceptance Co. LLC
1.850% 9/16/26 (a)		685,000		619,827
				1,244,412
Banks — 10.1%
ABN AMRO Bank NV
4.750% 7/28/25 (a)		625,000		615,368
1 yr. CMT + 1.550% 6.575% VRN 10/13/26 (a)		300,000		302,941
ANB Sukuk Ltd. 5 yr. CMT + 2.974%
3.326% VRN 10/28/30 (a)		650,000		621,087
Bank Negara Indonesia Persero Tbk. PT
5.280% 4/05/29 (a) (b)		350,000		349,562
Bank of America Corp.
Secured Overnight Financing Rate + 0.960% 1.734% VRN 7/22/27		265,000		244,317
3.950% 4/21/25		178,000		175,150
Bank of Ireland Group PLC Secured Overnight Financing Rate + 1.620%
5.601% VRN 3/20/30 (a)		238,000		237,053
Barclays PLC
5.200% 5/12/26		305,000		301,859
Secured Overnight Financing Rate + 1.740% 5.690% VRN 3/12/30		295,000		296,536
BPCE SA Secured Overnight Financing Rate + 1.980%
6.612% VRN 10/19/27 (a)		500,000		510,544
Cooperatieve Rabobank UA 1 yr. CMT + 1.120%
5.447% VRN 3/05/30 (a)		300,000		301,357
Credit Agricole SA Secured Overnight Financing Rate + 1.860%
6.316% VRN 10/03/29 (a)		375,000		388,770
Danske Bank AS
1 yr. CMT + 0.730% 1.549% VRN 9/10/27 (a) (c)		485,000		442,197
1 yr. CMT + 2.100% 6.466% VRN 1/09/26 (a)		275,000		275,999
Deutsche Bank AG Secured Overnight Financing Rate + 1.219%
2.311% VRN 11/16/27		430,000		393,133
HDFC Bank Ltd.
5.196% 2/15/27 (a)		250,000		247,903
HSBC Holdings PLC

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Secured Overnight Financing Rate + 1.430% 2.999% VRN 3/10/26	$	430,000	$	418,885
Secured Overnight Financing Rate + 3.350% 7.390% VRN 11/03/28		310,000		329,813
Huntington Bancshares, Inc. Secured Overnight Financing Rate + 2.020%
6.208% VRN 8/21/29		310,000		317,289
ING Groep NV Secured Overnight Financing Rate + 1.440%
5.335% VRN 3/19/30		295,000		294,279
JP Morgan Chase & Co. Secured Overnight Financing Rate + 0.765%
1.470% VRN 9/22/27		445,000		406,041
Lloyds Banking Group PLC 1 yr. CMT + 1.700%
5.871% VRN 3/06/29		325,000		330,256
Macquarie Group Ltd. Secured Overnight Financing Rate + 1.069%
1.340% VRN 1/12/27 (a)		845,000		783,741
Morgan Stanley
Secured Overnight Financing Rate + 1.610% 4.210% VRN 4/20/28		245,000		238,074
4.350% 9/08/26		400,000		391,366
Natwest Group PLC 1 yr. CMT + 0.900%
1.642% VRN 6/14/27		345,000		317,183
Santander UK Group Holdings PLC Secured Overnight Financing Rate + 1.220%
2.469% VRN 1/11/28		370,000		340,019
Societe Generale SA
1 yr. CMT + 1.100% 1.488% VRN 12/14/26 (a)		525,000		487,719
1 yr. CMT + 1.300% 2.797% VRN 1/19/28 (a)		200,000		184,675
Swedbank AB
5.407% 3/14/29 (a)		295,000		294,995
Synovus Bank
5.625% 2/15/28		273,000		265,110
Truist Financial Corp. Secured Overnight Financing Rate + 2.446%
7.161% VRN 10/30/29		305,000		325,252
UBS Group AG 1 yr. CMT + 1.080%
1.364% VRN 1/30/27 (a)		400,000		370,160
Wells Fargo & Co. Secured Overnight Financing Rate + 1.740%
5.574% VRN 7/25/29		310,000		313,674
				12,112,307
Beverages — 0.6%
Bacardi Ltd.
4.450% 5/15/25 (a)		378,000		372,716
JDE Peet's NV
1.375% 1/15/27 (a)		407,000		366,028
				738,744
Chemicals — 2.7%
Celanese US Holdings LLC
1.400% 8/05/26		250,000		227,914
6.165% 7/15/27		200,000		203,702
6.350% 11/15/28		305,000		315,967
International Flavors & Fragrances, Inc.
1.832% 10/15/27 (a)		400,000		354,686
MEGlobal Canada ULC
5.000% 5/18/25 (a)		450,000		443,961
Orbia Advance Corp. SAB de CV
1.875% 5/11/26 (a)		657,000		603,393
Syngenta Finance NV
4.892% 4/24/25 (a)		335,000		330,296
Yara International ASA
3.800% 6/06/26 (a)		325,000		312,491

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.750% 6/01/28 (a)	$	450,000	$	437,634
				3,230,044
Commercial Services — 1.0%
Element Fleet Management Corp.
5.643% 3/13/27 (a)		356,000		357,104
Triton Container International Ltd.
2.050% 4/15/26 (a)		950,000		875,393
				1,232,497
Diversified Financial Services — 3.9%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.450% 10/29/26		405,000		376,107
6.500% 7/15/25		300,000		302,892
Aircastle Ltd.
4.125% 5/01/24		740,000		738,807
Antares Holdings LP
2.750% 1/15/27 (a)		310,000		277,723
3.950% 7/15/26 (a)		605,000		568,567
Avolon Holdings Funding Ltd.
4.250% 4/15/26 (a)		925,000		892,738
BGC Group, Inc.
4.375% 12/15/25		505,000		491,101
Charles Schwab Corp. Secured Overnight Financing Rate + 1.878%
6.196% VRN 11/17/29		285,000		296,229
LeasePlan Corp. NV
2.875% 10/24/24 (a)		280,000		275,437
Macquarie Airfinance Holdings Ltd.
6.400% 3/26/29 (a)		74,000		75,171
REC Ltd.
2.250% 9/01/26 (a)		400,000		369,052
				4,663,824
Electric — 1.1%
Adani Transmission Step-One Ltd.
4.000% 8/03/26 (a)		350,000		328,998
Alliant Energy Finance LLC
1.400% 3/15/26 (a)		260,000		236,456
DTE Energy Co.
5.100% 3/01/29		300,000		298,790
FirstEnergy Pennsylvania Electric Co.
5.150% 3/30/26 (a)		226,000		224,122
Pacific Gas & Electric Co.
5.550% 5/15/29		275,000		277,401
				1,365,767
Electronics — 0.2%
Jabil, Inc.
4.250% 5/15/27		285,000		276,196
Entertainment — 0.4%
Warnermedia Holdings, Inc.
4.054% 3/15/29		500,000		468,063

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Food — 1.7%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
2.500% 1/15/27	$	860,000	$	792,732
Sigma Alimentos SA de CV
4.125% 5/02/26 (a)		450,000		435,484
Smithfield Foods, Inc.
4.250% 2/01/27 (a)		775,000		744,227
Tyson Foods, Inc.
5.400% 3/15/29		111,000		111,992
				2,084,435
Forest Products & Paper — 0.6%
Suzano International Finance BV
4.000% 1/14/25		700,000		689,329
Hand & Machine Tools — 0.5%
Regal Rexnord Corp.
6.050% 2/15/26 (a)		325,000		326,679
6.050% 4/15/28 (a)		300,000		304,129
				630,808
Home Builders — 0.3%
Toll Brothers Finance Corp.
4.875% 3/15/27		375,000		370,663
Housewares — 0.2%
Newell Brands, Inc.
6.375% 9/15/27 (c)		200,000		196,680
Insurance — 3.5%
Athene Global Funding
1.730% 10/02/26 (a)		445,000		403,837
2.500% 1/14/25 (a)		420,000		409,510
3.205% 3/08/27 (a)		212,000		198,011
CNO Global Funding
1.750% 10/07/26 (a)		714,000		650,740
2.650% 1/06/29 (a)		350,000		304,773
Corebridge Financial, Inc.
3.650% 4/05/27		235,000		224,276
GA Global Funding Trust
2.250% 1/06/27 (a)		685,000		626,809
Lincoln National Corp., (Acquired 4/19/23, Cost $310,303),
3.800% 3/01/28 (d)		350,000		334,879
Sammons Financial Group, Inc.
4.450% 5/12/27 (a)		1,140,000		1,086,780
				4,239,615
Internet — 0.3%
Expedia Group, Inc.
4.625% 8/01/27		309,000		303,117
Investment Companies — 3.3%
Ares Capital Corp.
3.875% 1/15/26		535,000		517,472
BlackRock TCP Capital Corp.
3.900% 8/23/24		163,000		161,476
Blackstone Private Credit Fund

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2.625% 12/15/26	$	490,000	$	447,087
2.700% 1/15/25		325,000		317,246
Blue Owl Credit Income Corp.
4.700% 2/08/27		500,000		474,333
Blue Owl Technology Finance Corp. II
6.750% 4/04/29 (a) (b)		477,000		471,083
Golub Capital BDC, Inc.
2.500% 8/24/26		270,000		248,071
3.375% 4/15/24 (c)		330,000		329,846
6.000% 7/15/29		296,000		290,707
HPS Corporate Lending Fund
6.750% 1/30/29 (a)		368,000		367,326
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24		410,000		404,845
				4,029,492
Lodging — 0.7%
Las Vegas Sands Corp.
3.200% 8/08/24		875,000		865,389
Machinery – Construction & Mining — 0.5%
Weir Group PLC
2.200% 5/13/26 (a)		680,000		631,202
Machinery – Diversified — 0.1%
AGCO Corp.
5.450% 3/21/27		57,000		57,255
Media — 0.5%
CCO Holdings LLC/CCO Holdings Capital Corp.
5.125% 5/01/27 (a)		350,000		333,470
Paramount Global
3.700% 6/01/28		350,000		310,115
				643,585
Mining — 0.5%
Indonesia Asahan Aluminium PT/Mineral Industri Indonesia Persero PT
4.750% 5/15/25 (a)		550,000		542,929
Oil & Gas — 1.9%
EQT Corp.
6.125% STEP 2/01/25		360,000		360,429
Ovintiv, Inc.
5.375% 1/01/26		275,000		273,880
5.650% 5/15/28		320,000		325,291
Parkland Corp.
5.875% 7/15/27 (a)		193,000		191,327
Patterson-UTI Energy, Inc.
3.950% 2/01/28		685,000		647,409
Ras Laffan Liquefied Natural Gas Co. Ltd. 3
5.838% 9/30/27 (a)		518,550		523,930
				2,322,266
Packaging & Containers — 0.2%
Smurfit Kappa Treasury ULC
5.200% 1/15/30 (a) (b)		290,000		289,637

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pharmaceuticals — 1.3%
Bayer US Finance II LLC
4.375% 12/15/28 (a)	$	325,000	$	305,901
Hikma Finance USA LLC
3.250% 7/09/25 (a)		675,000		650,119
Viatris, Inc.
2.300% 6/22/27		650,000		590,219
				1,546,239
Pipelines — 1.5%
Columbia Pipelines Holding Co. LLC
6.055% 8/15/26 (a)		280,000		283,060
Energy Transfer LP
4.950% 6/15/28		975,000		967,167
EQM Midstream Partners LP
5.500% 7/15/28		300,000		295,884
Harvest Midstream I LP
7.500% 9/01/28 (a)		234,000		237,260
				1,783,371
Real Estate Investment Trusts (REITS) — 3.1%
CubeSmart LP
2.250% 12/15/28		390,000		342,054
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		335,000		286,655
GLP Capital LP/GLP Financing II, Inc.
5.375% 4/15/26		348,000		344,969
Omega Healthcare Investors, Inc.
4.750% 1/15/28		779,000		752,076
Piedmont Operating Partnership LP
9.250% 7/20/28		275,000		292,850
SBA Tower Trust
1.884% 7/15/50 (a)		287,000		267,909
Store Capital LLC
4.500% 3/15/28		325,000		308,037
Sun Communities Operating LP
5.500% 1/15/29		295,000		294,228
VICI Properties LP/VICI Note Co., Inc.
3.750% 2/15/27 (a)		325,000		308,019
Vornado Realty LP
2.150% 6/01/26		310,000		281,811
WEA Finance LLC
3.500% 6/15/29 (a)		350,000		309,221
				3,787,829
Retail — 0.3%
Advance Auto Parts, Inc.
5.900% 3/09/26		144,000		143,772
Nordstrom, Inc.
2.300% 4/08/24		268,000		267,279
				411,051
Semiconductors — 0.2%
SK Hynix, Inc.
5.500% 1/16/27 (a)		200,000		199,979

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Telecommunications — 1.1%
Rogers Communications, Inc.
5.000% 2/15/29	$	305,000	$	302,882
Sprint Capital Corp.
6.875% 11/15/28		310,000		330,348
Tower Bersama Infrastructure Tbk. PT
4.250% 1/21/25 (a)		645,000		635,364
				1,268,594
Trucking & Leasing — 0.3%
GATX Corp.
5.400% 3/15/27		310,000		312,120
Venture Capital — 0.6%
Hercules Capital, Inc.
2.625% 9/16/26		560,000		508,523
3.375% 1/20/27		270,000		247,952
				756,475

TOTAL CORPORATE DEBT (Cost $55,500,662)				53,909,679

NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 34.7%
Automobile Asset-Backed Securities — 3.5%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-3A, Class C
3.150% 3/20/26 (a)		1,083,000		1,053,304
Carmax Auto Owner Trust, Series 2021-4, Class D
1.480% 3/15/28		250,000		230,879
Carvana Auto Receivables Trust
Series 2021-N1, Class D, 1.500% 1/10/28		226,911		215,310
Series 2021-P3, Class D, 2.250% 9/11/28		855,000		743,645
Ford Credit Floorplan Master Owner Trust A, Series 2023-1, Class B
5.310% 5/15/28 (a)		400,000		397,437
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450% 1/26/32 (a)		215,000		209,627
Westlake Automobile Receivables Trust, Series 2022-2A, Class D
5.480% 9/15/27 (a)		1,400,000		1,390,397
				4,240,599
Commercial Mortgage-Backed Securities — 6.5%
BAMLL Commercial Mortgage Securities Trust, Series 2019-BPR, Class CMP,
3.895% VRN 11/05/32 (a) (e)		370,000		332,861
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD Term SOFR + 1.797%
7.122% FRN 7/15/35 (a)		500,000		497,561
BX Commercial Mortgage Trust, Series 2021-SOAR, Class E, 1 mo. USD Term SOFR + 1.914%
7.241% FRN 6/15/38 (a)		288,657		285,410
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD Term SOFR + 2.447%
7.773% FRN 12/15/37 (a)		545,194		543,831
CARS-DB4 LP, Series 2020-1A, Class B1
4.170% 2/15/50 (a)		484,000		463,705
CF Hippolyta Issuer LLC, Series 2020-1, Class B1
2.280% 7/15/60 (a)		90,845		83,633

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD Term SOFR + 1.647%
6.973% FRN 5/15/36 (a)	$	199,504	$	199,317
DataBank Issuer LLC, Series 2021-1A, Class A2
2.060% 2/27/51 (a)		991,000		899,258
KIND Trust, Series 2021-KIND, Class B, 1 mo. USD Term SOFR + 1.464%
6.795% FRN 8/15/38 (a)		545,520		526,865
KREF Ltd., Series 2021-FL2, Class AS, 1 mo. USD Term SOFR + 1.414%
6.740% FRN 2/15/39 (a)		900,000		867,664
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD Term SOFR + 1.864%
7.190% FRN 3/15/38 (a)		365,665		357,438
MHC Commercial Mortgage Trust, Series 2021-MHC, Class E, 1 mo. USD Term SOFR + 2.215%
7.540% FRN 4/15/38 (a)		520,104		516,204
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A3
2.260% 11/20/50 (a)		399,333		370,905
One New York Plaza Trust
Series 2020-1NYP, Class C, 1 mo. USD Term SOFR + 2.314% 7.641% FRN 1/15/36 (a)		616,000		567,064
Series 2020-1NYP, Class D, 1 mo. USD Term SOFR + 2.864% 8.191% FRN 1/15/36 (a)		414,000		341,432
Store Master Funding I-VII, Series 2018-1A, Class A3
4.400% 10/20/48 (a)		497,033		489,018
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD Term SOFR + 2.214%
7.541% FRN 7/15/39 (a)		711,000		480,947
				7,823,113
Home Equity Asset-Backed Securities — 0.1%
Residential Asset Mortgage Products Trust, Series 2005-EFC1, Class M5, 1 mo. USD Term SOFR + 0.764%
6.419% FRN 5/25/35		119,235		116,964
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314%
6.644% FRN 11/25/35 (a)		62,516		61,587
				178,551
Other Asset-Backed Securities — 13.9%
AIMCO CLO 10 Ltd., Series 2019-10A, Class AR, 3 mo. USD Term SOFR + 1.322%
6.639% FRN 7/22/32 (a)		1,000,000		1,000,064
Apidos CLO XXVI Ltd., Series 2017-26A, Class A2R, 3 mo. USD Term SOFR + 1.762%
7.060% FRN 7/18/29 (a)		500,000		498,874
Aqua Finance Trust, Series 2021-A, Class A
1.540% 7/17/46 (a)		720,196		643,429
Bain Capital Credit CLO Ltd., Series 2022-1A, Class A1, 3 mo. USD Term SOFR + 1.320%
6.618% FRN 4/18/35 (a)		500,000		500,087
BHG Securitization Trust
Series 2021-B, Class C, 2.240% 10/17/34 (a)		448,000		396,761
Series 2022-C, Class A, 5.320% 10/17/35 (a)		267,935		266,651
BlueMountain Fuji US CLO I Ltd., Series 2017-1A, Class A1R, 3 mo. USD Term SOFR + 1.242%
6.559% FRN 7/20/29 (a)		453,434		453,591
BRE Grand Islander Timeshare Issuer LLC, Series 2019-A, Class B
3.780% 9/26/33 (a)		101,777		96,978

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36 (a)	$	309,614	$	289,673
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		45,798		44,507
Canyon Capital CLO Ltd., Series 2020-1A, Class AR, 3 mo. USD Term SOFR + 1.442%
6.756% FRN 7/15/34 (a)		600,000		600,203
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD Term SOFR + 1.242%
6.559% FRN 4/20/31 (a)		218,124		218,254
Cedar Funding VIII CLO Ltd., Series 2017-8A, Class A1R, 3 mo. USD Term SOFR + 1.412%
6.728% FRN 10/17/34 (a)		500,000		500,374
CIFC Funding Ltd.
Series 2021-1A, Class A1, 3 mo. USD Term SOFR + 1.372% 6.696% FRN 4/25/33 (a)		500,000		500,264
Series 2017-4A, Class A2R, 3 mo. USD Term SOFR + 1.812% 7.130% FRN 10/24/30 (a)		500,000		500,353
Elara HGV Timeshare Issuer LLC
Series 2017-A, Class B, 2.960% 3/25/30 (a)		75,305		75,136
Series 2019-A, Class C, 3.450% 1/25/34 (a)		210,400		200,061
Flatiron CLO 20 Ltd., Series 2020-1A, Class AR, 3 mo. USD Term SOFR + 1.380%
1.000% FRN 5/20/36 (a) (b)		500,000		500,090
FNA VI LLC, Series 2021-1A, Class A
1.350% 1/10/32 (a)		886,536		817,818
Goldman Home Improvement Trust Issuer Trust, Series 2021-GRN2, Class A
1.150% 6/25/51 (a)		279,097		261,611
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		306,016		258,336
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		150,182		135,117
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		139,096		124,873
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (e)		129,959		118,379
Hero Funding Trust
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		73,716		63,399
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		70,831		63,369
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		148,698		135,666
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		132,403		123,220
HIN Timeshare Trust, Series 2020-A, Class B
2.230% 10/09/39 (a)		320,717		296,339
Horizon Aircraft Finance III Ltd., Series 2019-2, Class B
4.458% 11/15/39 (a)		683,333		341,665
JG Wentworth XXII LLC, Series 2010-3A, Class A
3.820% 12/15/48 (a)		58,732		56,884
Madison Park Funding XXXII Ltd., Series 2018-32A, Class BR, 3 mo. USD Term SOFR + 1.662%
6.979% FRN 1/22/31 (a)		500,000		498,435
Mosaic Solar Loan Trust, Series 2018-2GS, Class A
4.200% 2/22/44 (a)		117,770		109,400
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (a)		25,436		24,421
Neuberger Berman Loan Advisers CLO 25 Ltd., Series 2017-25A, Class BR, 3 mo. USD Term SOFR + 1.612%
6.910% FRN 10/18/29 (a)		1,000,000		998,150
Newark BSL CLO 2 Ltd., Series 2017-1A, Class A2R, 3 mo. USD Term SOFR + 1.662%
6.986% FRN 7/25/30 (a)		250,000		250,029
NP SPE II LLC, Series 2017-1A, Class A1
3.372% 10/21/47 (a)		72,181		69,136

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Oxford Finance Funding LLC, Series 2020-1A, Class A2
3.101% 2/15/28 (a)	$	52,871	$	51,712
PFS Financing Corp., Series 2022-A, Class B
2.770% 2/15/27 (a)		500,000		485,909
PVONE 2023-1, LLC, Series 2023-2A, Class A
7.670% 9/17/35 (a)		500,635		504,511
Rad CLO 1 Ltd., Series 2018-1A, Class BR, 3 mo. USD Term SOFR + 1.662%
6.976% FRN 7/15/31 (a)		350,000		348,435
RR 19 Ltd., Series 2021-19A, Class A1, 3 mo. USD Term SOFR + 1.402%
6.716% FRN 10/15/35 (a)		500,000		500,261
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		430,000		425,098
Sierra Timeshare Receivables Funding LLC, Series 2020-2A, Class C
3.510% 7/20/37 (a)		21,867		21,224
Symphony CLO XXVIII Ltd., Series 2021-28A, Class A, 3 mo. USD Term SOFR + 1.402%
6.717% FRN 10/23/34 (a)		500,000		500,416
TICP CLO XI Ltd., Series 2018-11A, Class A, 3 mo. USD Term SOFR + 1.442%
6.759% FRN 10/20/31 (a)		354,835		354,938
TICP CLO XV Ltd., Series 2020-15A, Class A, 3 mo. USD Term SOFR + 1.542%
6.859% FRN 4/20/33 (a)		1,000,000		1,000,999
Verde CLO Ltd., Series 2019-1A, Class AR, 3 mo. USD Term SOFR + 1.362%
6.676% FRN 4/15/32 (a)		500,000		500,170
				16,725,270
Student Loans Asset-Backed Securities — 4.2%
College Avenue Student Loans LLC
Series 2021-A, Class B, 2.320% 7/25/51 (a)		648,143		571,314
Series 2017-A, Class B, 4.500% 11/26/46 (a)		217,727		207,733
Series 2018-A, Class A1, 1 mo. USD Term SOFR + 1.314% 6.644% FRN 12/26/47 (a)		209,103		207,263
Series 2017-A, Class A1, 1 mo. USD Term SOFR + 1.764% 7.094% FRN 11/26/46 (a)		143,772		144,918
Commonbond Student Loan Trust
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		15,872		13,120
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		17,651		13,765
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		8,415		7,361
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		38,224		34,054
ELFI Graduate Loan Program LLC, Series 2018-A, Class B
4.000% 8/25/42 (a)		49,231		44,536
Laurel Road Prime Student Loan Trust
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		256,646		238,623
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		172,101		164,870
Navient Private Education Refi Loan Trust, Series 2020-BA, Class B
2.770% 1/15/69 (a)		2,200,000		1,758,816
SLM Student Loan Trust
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.833% FRN 10/25/40		281,809		263,764
Series 2005-6, Class B, 90 day USD SOFR Average + 0.552% 5.913% FRN 1/25/44		270,111		255,738
Series 2005-9, Class B, 90 day USD SOFR Average + 0.562% 5.923% FRN 1/25/41		266,601		250,662
Series 2005-8, Class B, 90 day USD SOFR Average + 0.572% 5.933% FRN 1/25/55		101,755		96,454

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
SMB Private Education Loan Trust
Series 2018-C, Class A2B, 1 mo. USD Term SOFR + 0.864% 6.190% FRN 11/15/35 (a)	$	155,039	$	153,407
Series 2016-C, Class A2B, 1 mo. USD Term SOFR + 1.214% 6.540% FRN 9/15/34 (a)		22,896		22,867
Series 2023-D, Class A1B, 30 day USD SOFR Average + 1.650% 6.969% FRN 9/15/53 (a)		569,639		577,606
				5,026,871
Whole Loan Collateral Collateralized Mortgage Obligations — 6.4%
A&D Mortgage Trust, Series 2023-NQM3, Class A1,
6.733% STEP 7/25/68 (a)		1,109,626		1,115,767
Angel Oak Mortgage Trust, Series 2020-5, Class A3,
2.041% VRN 5/25/65 (a) (e)		63,598		58,109
Banc of America Mortgage Trust, Series 2004-G, Class 2A7,
5.258% VRN 8/25/34 (e)		932		909
BRAVO Residential Funding Trust, Series 2020-NQM1, Class A3,
2.406% VRN 5/25/60 (a) (e)		45,667		43,814
CIM Trust, Series 2019-INV3, Class A11, 30 day USD SOFR Average + 1.064%
5.500% FRN 8/25/49 (a)		280,740		267,902
Credit Suisse Mortgage Trust
Series 2021-NQM2, Class A3, 1.538% VRN 2/25/66 (a) (e)		441,061		373,702
Series 2021-NQM4, Class M1, 2.472% VRN 5/25/66 (a) (e)		500,000		325,056
Deephaven Residential Mortgage Trust, Series 2021-1, Class A3,
1.128% VRN 5/25/65 (a) (e)		111,716		102,815
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (e)		537,213		426,161
MFA Trust, Series 2021-NQM2, Class A3,
1.472% VRN 11/25/64 (a) (e)		333,054		283,245
New Residential Mortgage Loan Trust, Series 2016-4A, Class A1,
3.750% VRN 11/25/56 (a) (e)		99,465		91,935
NewRez Warehouse Securitization Trust, Series 2021-1, Class C, 1 mo. USD Term SOFR + 1.164%
6.494% FRN 5/25/55 (a)		803,400		803,786
NLT Trust
Series 2021-INV2, Class A3, 1.520% VRN 8/25/56 (a) (e)		617,071		504,937
Series 2021-INV2, Class M1, 2.569% VRN 8/25/56 (a) (e)		700,000		470,965
OBX Trust
Series 2021-NQM3, Class A3, 1.362% VRN 7/25/61 (a) (e)		729,492		575,943
Series 2021-NQM1, Class M1, 2.219% VRN 2/25/66 (a) (e)		333,000		223,277
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (e)		476,483		416,635
Starwood Mortgage Residential Trust
Series 2021-3, Class A3, 1.518% VRN 6/25/56 (a) (e)		194,034		158,677
Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (e)		467,803		449,374
Verus Securitization Trust
Series 2021-5, Class A3, 1.373% VRN 9/25/66 (a) (e)		178,426		148,498
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (e)		265,000		238,463
Series 2020-4, Class M1, 3.291% VRN 5/25/65 (a) (e)		548,000		499,672
Series 2019-INV2, Class A3, 4.219% VRN 7/25/59 (a) (e)		152,135		148,606
				7,728,248
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.1%
OBX Trust, Series 2020-INV1, Class A21,
3.500% VRN 12/25/49 (a) (e)		125,028		108,959

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $45,207,264)			$	41,831,611

U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (f) — 0.0%
Pass-Through Securities — 0.0%
Government National Mortgage Association
Pool #491089 7.000% 12/15/28	$	258		258
Pool #500928 7.000% 5/15/29		376		384
Pool #510083 7.000% 7/15/29		20		20
Pool #493723 7.000% 8/15/29		288		294
Pool #581417 7.000% 7/15/32		509		516
Government National Mortgage Association II
Pool #8746 1 yr. CMT + 1.500% 3.750% FRN 11/20/25		96		95
Pool #80136 1 yr. CMT + 1.500% 3.750% FRN 11/20/27		39		38
				1,605

TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $1,751)				1,605

U.S. TREASURY OBLIGATIONS — 0.6%
U.S. Treasury Bonds & Notes — 0.6%
U.S. Treasury Notes
1.750% 12/31/24		700,000		682,561

TOTAL U.S. TREASURY OBLIGATIONS (Cost $703,034)				682,561

TOTAL BONDS & NOTES (Cost $101,412,711)				96,425,456

TOTAL LONG-TERM INVESTMENTS (Cost $101,412,711)				96,425,456

SHORT-TERM INVESTMENTS — 18.4%
Commercial Paper — 16.6%
Amcor Flexibles North America, Inc.
5.621% 4/16/24 (a)		3,000,000		2,991,106
American Honda Finance Corp.
5.620% 4/03/24		3,000,000		2,997,296
Avangrid, Inc.
5.573% 4/08/24 (a)		3,000,000		2,994,870
5.600% 4/16/24 (a)		2,000,000		1,994,038
L3Harris Technologies, Inc.
5.917% 4/17/24 (a)		3,000,000		2,990,865
NextEra Energy Capital Holdings, Inc.
5.690% 5/07/24 (a)		2,000,000		1,987,622
NiSource, Inc.
5.620% 4/03/24 (a)		2,000,000		1,998,190
VW Credit, Inc.
5.656% 4/23/24 (a)		2,000,000		1,992,002
				19,945,989

MML Short-Duration Bond Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Investment of Cash Collateral from Securities Loaned — 0.4%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		554,000	$	554,000

	Principal Amount
Repurchase Agreement — 1.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (h)	$	1,687,726		1,687,726

TOTAL SHORT-TERM INVESTMENTS (Cost $22,199,942)				22,187,715

TOTAL INVESTMENTS — 98.5% (Cost $123,612,653) (i)				118,613,171

Other Assets/(Liabilities) — 1.5%				1,798,690

NET ASSETS — 100.0%			$	120,411,861

Abbreviation Legend

CLO	Collateralized Loan Obligation

CMT	Constant Maturity Treasury Index

FRN	Floating Rate Note

SOFR	Secured Overnight Financing Rate

STEP	Step Coupon Bond

VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)

(b)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.

(c)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $542,441 or 0.45% of net assets. (Note 2).

(d)	Restricted security. Certain securities are restricted to resale. At March 31, 2024, these securities amounted to a value of $334,879 or 0.28% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(e)

(f)	May contain securities that are issued by a U.S. Government Agency, but are unsecured and are not guaranteed by a U.S. Government Agency.

(g)	Represents investment of security lending cash collateral. (Note 2).

(h)	Maturity value of $1,688,026. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $1,721,507.

(i)	See Note 3 for aggregate cost for federal tax purposes.

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Note 2 Year	6/28/24		339	$	69,398,926	$	(78,723)
Short
U.S. Treasury Long Bond	6/18/24		2	$	(238,166)	$	(2,709)
U.S. Treasury Ultra 10 Year	6/18/24		21		(2,395,572)		(11,225)
U.S. Treasury Note 5 Year	6/28/24		180		(19,254,001)		(8,812)
						$	(22,746)

MML Small Cap Equity Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.9%

COMMON STOCK — 98.9%
Communication Services — 0.9%
Ziff Davis, Inc. (a)		19,581	$	1,234,386
Consumer Discretionary — 9.7%
AutoNation, Inc. (a)		15,890		2,631,066
Dorman Products, Inc. (a)		15,951		1,537,517
KB Home		25,416		1,801,486
Papa John's International, Inc.		9,711		646,753
Steven Madden Ltd. (b)		30,389		1,284,847
Texas Roadhouse, Inc.		10,652		1,645,414
TopBuild Corp. (a)		3,509		1,546,522
Visteon Corp. (a)		13,115		1,542,455
				12,636,060
Consumer Staples — 3.0%
BellRing Brands, Inc. (a)		42,631		2,516,508
BJ's Wholesale Club Holdings, Inc. (a)		17,607		1,331,969
				3,848,477
Energy — 5.2%
Chesapeake Energy Corp. (b)		15,232		1,353,059
CNX Resources Corp. (a)		80,798		1,916,528
Helmerich & Payne, Inc.		43,072		1,811,608
Northern Oil & Gas, Inc.		22,073		875,857
Nov, Inc.		43,134		841,976
				6,799,028
Financials — 12.9%
Bank of NT Butterfield & Son Ltd.		20,865		667,471
Berkshire Hills Bancorp, Inc.		33,515		768,164
Cathay General Bancorp		30,910		1,169,325
Columbia Banking System, Inc.		48,550		939,442
Definity Financial Corp.		36,836		1,173,161
Federated Hermes, Inc.		43,343		1,565,549
Marqeta, Inc. Class A (a)		130,041		775,044
OceanFirst Financial Corp.		43,326		710,980
Pacific Premier Bancorp, Inc.		45,959		1,103,016
PennyMac Financial Services, Inc.		17,117		1,559,188
Stifel Financial Corp.		23,875		1,866,309
United Community Banks, Inc.		27,516		724,221
Webster Financial Corp.		24,568		1,247,317
Wintrust Financial Corp.		16,294		1,700,931
WSFS Financial Corp.		17,190		775,957
				16,746,075

MML Small Cap Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care — 17.0%
Acadia Healthcare Co., Inc. (a)		27,041	$	2,142,188
Addus HomeCare Corp. (a)		10,766		1,112,558
ADMA Biologics, Inc. (a)		201,977		1,333,048
Ascendis Pharma AS ADR (a)		9,576		1,447,604
BioLife Solutions, Inc. (a) (b)		34,252		635,375
Bridgebio Pharma, Inc. (a)		25,860		799,591
BrightSpring Health Services, Inc. (a)		53,419		580,665
Cabaletta Bio, Inc. (a)		23,553		401,814
Collegium Pharmaceutical, Inc. (a)		33,346		1,294,492
CryoPort, Inc. (a) (b)		43,253		765,578
Encompass Health Corp.		17,804		1,470,254
Evolent Health, Inc. Class A (a) (b)		35,753		1,172,341
Guardant Health, Inc. (a)		41,182		849,585
Immunovant, Inc. (a)		12,176		393,407
Integer Holdings Corp. (a)		10,942		1,276,713
Intra-Cellular Therapies, Inc. (a)		19,437		1,345,040
SI-BONE, Inc. (a)		23,604		386,397
Structure Therapeutics, Inc. ADR (a)		6,778		290,505
Tenet Healthcare Corp. (a)		23,697		2,490,792
TransMedics Group, Inc. (a) (b)		10,878		804,319
Twist Bioscience Corp. (a)		31,904		1,094,626
				22,086,892
Industrials — 22.4%
ABM Industries, Inc.		18,528		826,719
Air Lease Corp.		21,558		1,108,944
Allison Transmission Holdings, Inc.		29,969		2,432,284
ASGN, Inc. (a)		19,285		2,020,297
Atkore, Inc.		16,457		3,132,755
BWX Technologies, Inc.		14,969		1,536,119
CACI International, Inc. Class A (a)		4,647		1,760,423
Casella Waste Systems, Inc. Class A (a)		17,237		1,704,222
Curtiss-Wright Corp.		7,229		1,850,190
Enpro, Inc.		13,268		2,239,240
Esab Corp.		15,170		1,677,347
Hub Group, Inc. Class A		38,574		1,667,168
KBR, Inc.		18,273		1,163,259
Korn Ferry		26,285		1,728,502
Paycor HCM, Inc. (a) (b)		67,382		1,309,906
Regal Rexnord Corp.		5,485		987,848
Zurn Elkay Water Solutions Corp. Class C		60,433		2,022,693
				29,167,916
Information Technology — 13.4%
Allegro MicroSystems, Inc. (a)		42,271		1,139,626
Astera Labs, Inc. (a)		4,482		332,520
Belden, Inc.		14,605		1,352,569
Endava PLC Sponsored ADR (a)		20,409		776,358
Envestnet, Inc. (a)		19,073		1,104,517
Gitlab, Inc. Class A (a)		27,860		1,624,795
HashiCorp, Inc. Class A (a)		26,670		718,756
Itron, Inc. (a)		18,556		1,716,801
MACOM Technology Solutions Holdings, Inc. (a)		18,004		1,721,903
MKS Instruments, Inc.		11,434		1,520,722
Progress Software Corp.		19,476		1,038,266

MML Small Cap Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Silicon Laboratories, Inc. (a)		9,054	$	1,301,241
Sprout Social, Inc. Class A (a) (b)		31,414		1,875,730
Vishay Intertechnology, Inc.		53,160		1,205,669
				17,429,473
Materials — 6.6%
ATI, Inc. (a)		28,299		1,448,060
Century Aluminum Co. (a)		55,779		858,439
Commercial Metals Co.		19,757		1,161,119
Kaiser Aluminum Corp.		8,538		762,955
Silgan Holdings, Inc.		28,714		1,394,352
Summit Materials, Inc. Class A (a)		65,750		2,930,477
				8,555,402
Real Estate — 6.1%
DiamondRock Hospitality Co.		188,246		1,809,044
DigitalBridge Group, Inc.		71,533		1,378,441
Four Corners Property Trust, Inc.		62,112		1,519,881
Outfront Media, Inc.		99,466		1,670,034
Terreno Realty Corp.		24,116		1,601,302
				7,978,702
Utilities — 1.7%
Chesapeake Utilities Corp.		10,212		1,095,748
Portland General Electric Co. (b)		27,836		1,169,112
				2,264,860

TOTAL COMMON STOCK (Cost $84,418,455)				128,747,271

TOTAL EQUITIES (Cost $84,418,455)				128,747,271

TOTAL LONG-TERM INVESTMENTS (Cost $84,418,455)				128,747,271

SHORT-TERM INVESTMENTS — 0.4%

	Principal Amount
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (c)	$	494,683		494,683

TOTAL SHORT-TERM INVESTMENTS (Cost $494,683)				494,683

TOTAL INVESTMENTS — 99.3% (Cost $84,913,138) (d)				129,241,954

Other Assets/(Liabilities) — 0.7%				872,764

NET ASSETS — 100.0%			$	130,114,718

Abbreviation Legend

ADR	American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.

(b)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $9,023,786 or 6.94% of net assets. The Fund received $9,227,738 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(c)	Maturity value of $494,771. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $504,620.

(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Strategic Emerging Markets Fund — Portfolio of Investments

March 31, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.0%

COMMON STOCK — 97.9%
Brazil — 5.9%
Ambev SA		321,712	$	801,169
Arezzo Industria e Comercio SA		7,336		94,007
B3 SA - Brasil Bolsa Balcao		161,300		385,610
Localiza Rent a Car SA		24,159		263,392
NU Holdings Ltd. Class A (a)		49,449		589,927
Raia Drogasil SA		3,800		20,737
Vale SA Sponsored ADR		22,844		278,468
WEG SA		47,984		365,472
				2,798,782
Chile — 1.5%
Antofagasta PLC		13,474		347,830
Banco de Chile		1,484,704		165,174
Banco Santander Chile		4,345,517		216,440
				729,444
China — 17.2%
Budweiser Brewing Co. APAC Ltd. (b)		90,000		132,703
H World Group Ltd.		4,500		17,442
H World Group Ltd. ADR		57,319		2,218,245
MicroTech Medical Hangzhou Co. Ltd. Class H (a) (b)		8,100		4,331
NetEase, Inc. ADR		4,140		428,366
New Horizon Health Ltd. (a) (b) (d)		63,000		113,393
PDD Holdings, Inc. ADR (a)		4,924		572,415
Tencent Holdings Ltd.		52,009		2,029,635
WuXi Biologicals Cayman, Inc. (a) (b)		28,501		51,226
WuXi XDC Cayman, Inc. (a)		68,000		159,011
Yum China Holdings, Inc.		30,562		1,216,062
ZTO Express Cayman, Inc.		3,073		65,257
ZTO Express Cayman, Inc. ADR		52,553		1,100,460
				8,108,546
France — 5.6%
L'Oreal SA		597		283,134
Pernod Ricard SA		10,276		1,661,519
TotalEnergies SE		10,348		711,529
				2,656,182
Hong Kong — 0.1%
AIA Group Ltd.		3,400		22,817
India — 15.9%
Havells India Ltd.		15,527		284,275
HCL Technologies Ltd.		12,509		232,131

MML Strategic Emerging Markets Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
HDFC Bank Ltd.		116,518	$	2,025,863
Kotak Mahindra Bank Ltd.		121,906		2,617,115
Macrotech Developers Ltd. (b)		14,112		191,196
Oberoi Realty Ltd.		36,448		642,679
Tata Consultancy Services Ltd.		32,972		1,537,577
				7,530,836
Indonesia — 1.4%
Bank Central Asia Tbk. PT		843,200		535,855
Bank Rakyat Indonesia Persero Tbk. PT		309,800		118,411
				654,266
Italy — 2.1%
Ermenegildo Zegna NV		7,504		109,933
PRADA SpA		112,500		891,377
				1,001,310
Japan — 2.2%
Chugai Pharmaceutical Co. Ltd.		6,400		244,616
Daiichi Sankyo Co. Ltd.		25,300		804,126
				1,048,742
Mexico — 14.2%
America Movil SAB de CV ADR		55,640		1,038,242
Fomento Economico Mexicano SAB de CV		104,624		1,367,806
Grupo Financiero Banorte SAB de CV Class O		9,732		104,724
Grupo Mexico SAB de CV Series B		482,423		2,862,629
Wal-Mart de Mexico SAB de CV		329,222		1,341,170
				6,714,571
Netherlands — 0.6%
Argenx SE ADR (a)		773		304,346
Peru — 1.3%
Credicorp Ltd.		3,531		598,257
Philippines — 1.6%
SM Investments Corp.		38,155		662,731
SM Prime Holdings, Inc.		147,100		85,702
				748,433
Poland — 0.2%
Allegro.eu SA (a) (b)		8,439		69,936
Portugal — 1.6%
Galp Energia SGPS SA		45,920		760,112
Republic of Korea — 11.2%
Kakao Corp.		4,534		183,302
LG Chem Ltd.		1,331		435,197
LG H&H Co. Ltd.		388		111,418
NAVER Corp.		1,639		227,875
Samsung Biologics Co. Ltd. (a) (b)		1,431		885,611
Samsung Electronics Co. Ltd.		51,030		3,055,412

MML Strategic Emerging Markets Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
SK Hynix, Inc.		3,054	$	405,868
				5,304,683
Russia — 0.0%
Novatek PJSC GDR (a) (b) (c) (d)		1,820		—
Sberbank of Russia PJSC (c) (d)		7,525		—
				—
South Africa — 0.8%
FirstRand Ltd. (e)		121,811		397,013
Switzerland — 2.2%
Cie Financiere Richemont SA Registered Class A		6,252		956,395
Galderma Group AG (a)		1,398		98,202
				1,054,597
Taiwan — 9.9%
MediaTek, Inc.		2,000		72,655
Taiwan Semiconductor Manufacturing Co. Ltd.		188,000		4,529,659
Voltronic Power Technology Corp.		1,000		51,613
				4,653,927
Turkey — 1.0%
Akbank TAS		96,254		139,357
BIM Birlesik Magazalar AS		7,427		80,720
KOC Holding AS		24,692		155,313
Migros Ticaret AS		5,038		63,665
Yapi ve Kredi Bankasi AS		63,869		54,326
				493,381
United Arab Emirates — 0.3%
Americana Restaurants International PLC		160,569		145,160
United Kingdom — 1.1%
AstraZeneca PLC		3,667		493,729

TOTAL COMMON STOCK (Cost $42,207,909)				46,289,070

PREFERRED STOCK — 1.1%
Brazil — 1.1%
Itau Unibanco Holding SA 3.699%
		72,419		500,178

TOTAL PREFERRED STOCK (Cost $393,733)				500,178

TOTAL EQUITIES (Cost $42,601,642)				46,789,248

TOTAL LONG-TERM INVESTMENTS (Cost $42,601,642)				46,789,248

MML Strategic Emerging Markets Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 0.7%
Repurchase Agreement — 0.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/28/24, 1.600%, due 4/01/24 (f)	$	328,039	$	328,039

TOTAL SHORT-TERM INVESTMENTS (Cost $328,039)				328,039

TOTAL INVESTMENTS — 99.7% (Cost $42,929,681) (g)				47,117,287

Other Assets/(Liabilities) — 0.3%				144,622

NET ASSETS — 100.0%			$	47,261,909

Abbreviation Legend

ADR	American Depositary Receipt

GDR	Global Depositary Receipt

PJSC	Public Joint Stock Company

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.

(b)

(c)	Investment is valued using significant unobservable inputs.

(d)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2024, these securities amounted to a value of $113,393 or 0.24% of net assets.

(e)

Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2024, was $318,320 or 0.67% of net assets. The Fund received $332,007 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

(f)	Maturity value of $328,098. Collateralized by U.S. Government Agency obligations with a rate of 5.000%, maturity date of 9/30/25, and an aggregate market value, including accrued interest, of $334,700.

(g)	See Note 3 for aggregate cost for federal tax purposes.

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MML Series Investment Fund II (the "Trust") is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. The Trust is organized under the laws of the Commonwealth of Massachusetts as a Massachusetts business trust pursuant to an Agreement and Declaration of Trust dated February 8, 2005, which was amended and restated as of February 28, 2005 and December 15, 2011, as it may be further amended from time to time. The Trust consists of 13 series, including the following 12 series listed below (each individually referred to as a "Fund" or collectively as the "Funds"):

MML Blend Fund ("Blend Fund")

MML Dynamic Bond Fund ("Dynamic Bond Fund")

MML Equity Fund ("Equity Fund")

MML Equity Rotation Fund ("Equity Rotation Fund")

MML High Yield Fund ("High Yield Fund")

MML Inflation-Protected and Income Fund ("Inflation-Protected and Income Fund")

MML iShares^® 60/40 Allocation Fund ("iShares 60/40 Allocation Fund")

MML iShares^® 80/20 Allocation Fund ("iShares 80/20 Allocation Fund")

MML Managed Bond Fund ("Managed Bond Fund")

MML Short-Duration Bond Fund ("Short-Duration Bond Fund")

MML Small Cap Equity Fund ("Small Cap Equity Fund")

MML Strategic Emerging Markets Fund ("Strategic Emerging Markets Fund")

The Trust makes shares of the Funds available for the investment of assets of various separate investment accounts established by Massachusetts Mutual Life Insurance Company ("MassMutual") and by life insurance companies which are subsidiaries of MassMutual. Shares of the Trust are not offered to the general public. MassMutual, MML Bay State Life Insurance Company, C.M. Life Insurance Company, and the MML Conservative Allocation Fund, MML Balanced Allocation Fund, MML Moderate Allocation Fund, MML Growth Allocation Fund, and MML Aggressive Allocation Fund, which are "funds of funds" series of MML Series Investment Fund, another open-end management investment company sponsored by MassMutual, are the record owners of all of the outstanding shares of the Funds.

The Blend Fund, iShares 60/40 Allocation Fund, and iShares 80/20 Allocation Fund invest substantially all of their investable assets in shares of ETFs advised by an affiliate of the Funds' subadviser, BlackRock Investment Management, LLC ("Underlying ETFs").

2. Significant Accounting Policies

Each Fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic 946, Financial Services – Investment Companies.

Investment Valuation

The net asset value of each Fund's shares is determined once daily as of the close of regular trading on the New York Stock Exchange ("NYSE"), on each day the NYSE is open for trading (a "business day"). The NYSE normally closes at 4:00 p.m. Eastern Time, but may close earlier on some days. If the NYSE is scheduled to close early, the business day will be considered to end as of the time of the NYSE's scheduled close. A Fund will not treat an intraday disruption in NYSE trading or other event that causes an unscheduled closing of the NYSE as a close of business of the NYSE for these purposes; instead, MML Investment Advisers, LLC ("MML Advisers") will determine the fair value of a Fund's securities in accordance with MML Advisers' fair valuation policy and procedures. On holidays and other days when the NYSE is closed, each Fund's net asset value generally is not calculated and the Funds do not anticipate accepting buy or sell orders. However, the value of each Fund's assets may still be affected on such days to the extent that a Fund holds foreign securities that trade on days that foreign securities markets are open.

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity securities and derivative contracts that are actively traded on a national securities exchange or contract market are valued on the basis of information furnished by a pricing service, which provides the last reported sale price, or, in the case of futures contracts, the settlement price, for securities or derivatives listed on the exchange or contract market or the official closing price on the NASDAQ National Market System ("NASDAQ System"), or in the case of over-the-counter ("OTC") securities for which an official closing price is unavailable or not reported on the NASDAQ System, the last reported bid price. Portfolio securities traded on more than one national securities exchange are valued at the last price at the close of the exchange representing the principal market for such securities. Debt securities are valued on the basis of valuations furnished by a pricing service, which generally determines valuations taking into account factors such as institutional-size trading in similar securities, yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. Shares of other open-end mutual funds are valued at their closing net asset values as reported on each business day.

Investments for which market quotations are readily available are marked to market daily based on those quotations. Market quotations may be provided by third-party vendors or market makers, and may be determined on the basis of a variety of factors, such as broker quotations, financial modeling, and other market data, such as market indexes and yield curves, counterparty information, and foreign exchange rates. U.S. Government and agency securities may be valued on the basis of market quotations or using a model that may incorporate market observable data such as reported sales of similar securities, broker quotes, yields, bids, offers, quoted market prices, and reference data. The fair values of OTC derivative contracts, including forward, swap, and option contracts related to interest rates, foreign currencies, credit standing of reference entities, equity prices, or commodity prices, may be based on market quotations or may be modeled using a series of techniques, including simulation models, depending on the contract and the terms of the transaction. The fair values of asset-backed securities and mortgage-backed securities are estimated based on models that consider the estimated cash flows of each debt tranche of the issuer, established benchmark yield, and estimated tranche-specific spread to the benchmark yield based on the unique attributes of the tranche, including, but not limited to, prepayment speed assumptions and attributes of the collateral.

The Board of Trustees ("Trustees") have designated MML Advisers as the Funds' "valuation designee," responsible for determining the fair value, in good faith, of securities and other instruments held by the Funds for which market quotations are not readily available or for which such market quotations or values are considered by MML Advisers or a subadviser to be unreliable (including, for example, certain foreign securities, thinly-traded securities, certain restricted securities, certain initial public offerings, or securities whose values may have been affected by a significant event). It is possible that a significant amount of a Fund's assets will be subject to fair valuation in accordance with MML Advisers' fair valuation policy and procedures. The fair value determined for an investment by MML Advisers may differ from recent market prices for the investment and may be significantly different from the value realized upon the sale of such investment.

The Funds may invest in securities that are traded principally in foreign markets and that trade on weekends and other days when the Funds do not price their shares. As a result, the values of the Funds' portfolio securities may change on days when the prices of the Funds' shares are not calculated. The prices of the Funds' shares will reflect any such changes when the prices of the Funds' shares are next calculated, which is the next business day. The Funds may use fair value pricing more frequently for securities primarily traded in foreign markets because, among other things, most foreign markets close well before the Funds value their securities. The earlier close of these foreign markets gives rise to the possibility that significant events, including broad market moves, may have occurred in the interim. The Funds' investments may be priced based on fair values provided by a third-party vendor, based on certain factors and methodologies applied by such vendor, in the event that there is movement in the U.S. market, between the close of the foreign market and the time the Funds calculate their net asset values. All assets and liabilities expressed in foreign currencies are converted into U.S. dollars at the mean between the buying and selling rates of such currencies against the U.S. dollar at the end of each business day.

Notes to Portfolio of Investments (Unaudited) (Continued)

Investments in equity or debt issued by privately held companies or funds ("Private Company" or collectively, the "Private Companies") and any other investments fair valued using significant unobservable inputs may be fair valued using alternate valuation approaches including the following:

Market approach: considers factors including the price of recent investments in the same or similar security or financial metrics of comparable securities.

Income approach: considers factors including expected future cash flows, security specific risks, and corresponding discount rates.

Cost approach: considers factors including the value of the security's underlying assets and liabilities.

Investments in series of preferred stock issued by Private Companies are typically valued utilizing the Market approach in determining the enterprise value of the company. Such investments often contain rights and preferences that differ from other series of preferred and common stock of the same issuer. Valuation techniques such as the current value method ("CVM"), an option pricing model ("OPM"), a probability weighted expected return model ("PWERM"), or a hybrid of those techniques are used in allocating enterprise value of the company, as deemed appropriate under the circumstances. The CVM allocates value among the various parts of a company's capital structure assuming that the value of convertible preferred stock is represented by the most favorable claim the preferred stockholders have on the enterprise value as of the valuation date. The use of OPM and PWERM techniques involve a determination of the exit scenarios of the investment in order to appropriately allocate the enterprise value of the company among the various parts of its capital structure.

The Private Companies are not subject to the public company disclosure, timing, and reporting standards as other investments held by a Fund. Typically, the most recently available information for a Private Company is as of a date that is earlier than the date a Fund is calculating its net asset value. This factor may result in a difference between the value of the investment and the price a Fund could receive upon the sale of the investment.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-tier hierarchy is utilized to maximize the use of observable market data inputs and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Inputs refer broadly to the assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, for example, the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and/or the risk inherent in the inputs to the valuation technique. Inputs may be observable or unobservable. Observable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs are inputs that reflect the reporting entity's own assumptions about the assumptions market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. The three-tier hierarchy of inputs is summarized in the three broad Levels listed below. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those investments and the determination of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to each security.

Notes to Portfolio of Investments (Unaudited) (Continued)

Level 1 – quoted prices (unadjusted) in active markets for identical investments that the Funds can access at the measurement date

Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

Level 3 – significant unobservable inputs, to the extent observable inputs are not available (including the Funds' own assumptions in determining the fair value of investments)

The availability of observable inputs can vary from security to security and is affected by a wide variety of factors, including, for example, the type of security, whether the security is new and not yet established in the marketplace, the liquidity of markets, and other characteristics particular to the security. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3.

Changes in valuation techniques may result in transfers in or out of an investment's assigned Level within the hierarchy. In addition, in periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This condition, as well as changes related to liquidity of investments, could cause a security to be reclassified between Levels.

In certain cases, the inputs used to measure fair value may fall into different Levels of the fair value hierarchy. In such cases, for disclosure purposes, the Level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest Level input that is significant to the overall fair value measurement.

The iShares 60/40 Allocation Fund and Small Cap Equity Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of March 31, 2024. For each Fund noted in the preceding sentence, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

Notes to Portfolio of Investments (Unaudited) (Continued)

The following is the aggregate value by input level, as of March 31, 2024, for the remaining Funds' investments:

Blend Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Exchange-Traded Funds	$	698,144,206	$	—	$	—	$	698,144,206
Short-Term Investments		37,579,372		211,174		—		37,790,546
Total Investments	$	735,723,578	$	211,174	$	—	$	735,934,752

Notes to Portfolio of Investments (Unaudited) (Continued)

Dynamic Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	6,411,815		$	—	$	6,411,815
Corporate Debt		—			79,068,153			—		79,068,153
Non-U.S. Government Agency Obligations		—			29,638,713			—		29,638,713
Sovereign Debt Obligations		—			13,580,329			—		13,580,329
U.S. Government Agency Obligations and Instrumentalities		—			74,325,709			—		74,325,709
U.S. Treasury Obligations		—			11,256,288			—		11,256,288
Purchased Options		108,443			1,553			—		109,996
Short-Term Investments		1,961,290			14,541,042			—		16,502,332
Total Investments	$	2,069,733		$	228,823,602		$	—	$	230,893,335

Asset Derivatives
Forward Contracts	$	—		$	226,813		$	—	$	226,813
Futures Contracts		614,502			—			—		614,502
Swap Agreements		—			2,038,928			—		2,038,928
Total	$	614,502		$	2,265,741		$	—	$	2,880,243

Liability Derivatives
Forward Contracts	$	—		$	(583,312	)	$	—	$	(583,312	)
Futures Contracts		(181,800	)		—			—		(181,800	)
Swap Agreements		—			(267,899	)		—		(267,899	)
Written Options		(110,519	)		(11,035	)		—		(121,554	)
Total	$	(292,319	)	$	(862,246	)	$	—	$	(1,154,565	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	860,027,699	$	3,559,497	*	$	—	$	863,587,196
Exchange-Traded Funds		4,173,263		—			—		4,173,263
Short-Term Investments		1,776,216		2,114,455			—		3,890,671
Total Investments	$	865,977,178	$	5,673,952		$	—	$	871,651,130

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Rotation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	57,518,555	$	—	$	2,180	$	57,520,735
Short-Term Investments		104,941		—		—		104,941
Total Investments	$	57,623,496	$	—	$	2,180	$	57,625,676

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Bank Loans	$	—	$	4,651,521	$	—	$	4,651,521
Corporate Debt		—		44,365,212		—		44,365,212
Short-Term Investments		1,652,695		1,291,901		—		2,944,596
Total Investments	$	1,652,695	$	50,308,634	$	—	$	51,961,329

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	976,026		$	—	$	976,026
Non-U.S. Government Agency Obligations		—			92,807,562			3,133,055		95,940,617
U.S. Government Agency Obligations and Instrumentalities		—			19,160,924			—		19,160,924
U.S. Treasury Obligations		—			34,355,867			—		34,355,867
Short-Term Investments		—			29,579,469			—		29,579,469
Total Investments	$	—		$	176,879,848		$	3,133,055	$	180,012,903

Asset Derivatives
Futures Contracts	$	40,175		$	—		$	—	$	40,175
Swap Agreements		—			3,341,267			—		3,341,267
Total	$	40,175		$	3,341,267		$	—	$	3,381,442

Liability Derivatives
Futures Contracts	$	(4,098	)	$	—		$	—	$	(4,098	)
Swap Agreements		—			(161,684	)		—		(161,684	)
Total	$	(4,098	)	$	(161,684	)	$	—	$	(165,782	)

Notes to Portfolio of Investments (Unaudited) (Continued)

iShares 80/20 Allocation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Exchange-Traded Funds	$	70,081,132	$	—	$	—	$	70,081,132
Short-Term Investments		47,950		141,907		—		189,857
Total Investments	$	70,129,082	$	141,907	$	—	$	70,270,989

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	247,260,941	$	—	$	247,260,941
Non-U.S. Government Agency Obligations		—			147,075,454		—		147,075,454
Sovereign Debt Obligations		—			1,374,990		—		1,374,990
U.S. Government Agency Obligations and Instrumentalities		—			193,554,042		—		193,554,042
U.S. Treasury Obligations		—			50,881,916		—		50,881,916
Short-Term Investments		1,233,210			92,930,943		—		94,164,153
Total Investments	$	1,233,210		$	733,078,286	$	—	$	734,311,496

Asset Derivatives
Futures Contracts	$	505,124		$	—	$	—	$	505,124

Liability Derivatives
Futures Contracts	$	(25,999	)	$	—	$	—	$	(25,999	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	53,909,679	$	—	$	53,909,679
Non-U.S. Government Agency Obligations		—			41,831,611		—		41,831,611
U.S. Government Agency Obligations and Instrumentalities		—			1,605		—		1,605
U.S. Treasury Obligations		—			682,561		—		682,561
Short-Term Investments		554,000			21,633,715		—		22,187,715
Total Investments	$	554,000		$	118,059,171	$	—	$	118,613,171

Liability Derivatives
Futures Contracts	$	(101,469	)	$	—	$	—	$	(101,469	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock*
Brazil	$	1,903,606	$	895,176	$	—		$	2,798,782
Chile		381,614		347,830		—			729,444
China		5,535,548		2,572,998		—			8,108,546
France		—		2,656,182		—			2,656,182
Hong Kong		—		22,817		—			22,817
India		—		7,530,836		—			7,530,836
Indonesia		—		654,266		—			654,266
Italy		109,933		891,377		—			1,001,310
Japan		—		1,048,742		—			1,048,742
Mexico		1,038,242		5,676,329		—			6,714,571
Netherlands		304,346		—		—			304,346
Peru		598,257		—		—			598,257
Philippines		—		748,433		—			748,433
Poland		—		69,936		—			69,936
Portugal		—		760,112		—			760,112
Republic of Korea		—		5,304,683		—			5,304,683
Russia		—		—		—	+		—
South Africa		—		397,013		—			397,013
Switzerland		—		1,054,597		—			1,054,597
Taiwan		—		4,653,927		—			4,653,927
Turkey		—		493,381		—			493,381
United Arab Emirates		—		145,160		—			145,160
United Kingdom		—		493,729		—			493,729
Preferred Stock*
Brazil		—		500,178		—			500,178
Short-Term Investments		—		328,039		—			328,039
Total Investments	$	9,871,546	$	37,245,741	$	—		$	47,117,287

Includes foreign equity securities whose values were adjusted to reflect market trading of comparable securities or other correlated instruments after the close of trading in their respective foreign markets, as applicable.

Represents a security at $0 value as of March 31, 2024.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

Derivatives are financial instruments whose values are based on the values of one or more underlying indicators, such as a security, asset, currency, interest rate, or index. Derivative transactions can create investment leverage and may be highly volatile. Losses from derivatives can be substantially greater than the derivatives' original cost and can sometimes be unlimited. A Fund may not be able to close out a derivative transaction at a favorable time or price.

Please refer to the Funds’ most recent Annual/Semiannual reports and Prospectus(es) and Statement(s) of Additional Information which can be found on the Securities and Exchange Commission's EDGAR database on its website at http://www.sec.gov for more information regarding the derivatives and other investments held by the Fund(s).

Securities Lending

Each Fund may lend its securities; however, lending cannot exceed 33% of the total assets of the Fund taken at current value. The Funds' securities lending activities are governed by a Securities Lending Agency Agreement ("Lending Agreement") between each Fund and the lending agent ("Agent"). The Lending Agreement authorizes the Agent to lend portfolio securities held by a Fund to approved borrowers (each, a "Borrower").

Each Fund expects that in connection with any securities on loan, the loan will be secured continuously by collateral consisting of cash (U.S. currency) and/or securities (U.S. Treasury and Agency obligations) adjusted daily to have value at least equal to the current market value of the securities loaned. The market value of the loaned securities is determined at the close of business of a Fund and any additional collateral is delivered to the Fund the next business day. The Funds bear the risk of loss with respect to the investment of cash collateral. As with other extensions of credit, the Funds may bear the risk of delay in recovery of the loaned securities or even loss of rights in the collateral should the Borrower of the securities fail financially. Pursuant to the Lending Agreement, the Agent has provided indemnification to the Funds in the event of default by a Borrower with respect to a loan. The Funds receive compensation for lending their securities in the form of a securities loan fee paid by the Borrower, as well as a share of the income earned on investment of the cash collateral received for the loaned securities. At March 31, 2024, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan and all of the Funds' cash collateral was invested in the State Street Navigator Securities Lending Government Money Market Portfolio.

Subject to the terms of the Lending Agreement and the agreement between the Agent and the applicable Borrower ("Borrowing Agreement"), security loans can be terminated by the Agent, the Fund, or the Borrower and the related securities must be returned within the earlier of the customary settlement period for such securities or the period of time specified in the Borrowing Agreement.

Accounting for Investment Transactions

Investment transactions are accounted for on the trade date. Realized gains and losses on sales of investments and unrealized appreciation and depreciation of investments are computed by the specific identification cost method. Proceeds received from litigation, if any, are included in realized gains on investment transactions for any investments that are no longer held in the portfolio and as a reduction in cost for investments that continue to be held in the portfolio. Interest income, adjusted for amortization of discounts and premiums on debt securities, is earned from the settlement date and is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date. Withholding taxes on foreign interest, dividends, and capital gains have been provided for in accordance with the applicable country's tax rules and rates. Foreign dividend income is recorded on the ex-dividend date or as soon as practicable after the Fund determines the existence of a dividend declaration after exercising reasonable due diligence. Distributions received on securities that represent a return of capital or capital gains are recorded as a reduction of cost of investments and/or as a realized gain.

Foreign Currency Translation

The books and records of the Funds are maintained in U.S. dollars. The market values of foreign currencies, foreign securities, and other assets and liabilities denominated in foreign currencies are translated into U.S. dollars at the mean of the buying and selling rates of such currencies against the U.S. dollar at the end of each business day. Purchases and sales of foreign securities and income and expense items are translated at the rates of exchange prevailing on the respective dates of such transactions. The Funds do not isolate that portion of the results of operations arising from changes in the exchange rates from that portion arising from changes in the market prices of securities. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of dividends or interest recorded on the books of the Funds and the amount actually received.

Foreign Securities

The Strategic Emerging Markets Fund invests substantially all of its assets in foreign securities. The other Funds except for the Blend Fund, iShares 60/40 Allocation Fund, and iShares 80/20 Allocation Fund, may also invest in foreign securities. In addition, certain Underlying ETFs may invest in foreign securities. Foreign securities, including American Depositary Receipts, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, public health, and diplomatic risks. In addition, fluctuations in currency exchange rates may favorably or unfavorably affect the values of foreign securities and the price of a Fund's shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, less stringent investor protection and disclosure standards, less reliable settlement practices, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater volatility in currency exchange rates, and are more susceptible to environmental problems.

Notes to Portfolio of Investments (Unaudited) (Continued)

Federal Income Tax

It is each Fund's intent to continue to comply with the provisions of Subchapter M of the Internal Revenue Code of 1986, as amended, applicable to a regulated investment company. Under such provisions, the Funds would not be subject to U.S. federal income taxes on their ordinary income and net realized capital gains to the extent they are distributed or deemed to have been distributed to their shareholders. Therefore, the Funds have not made any provision for U.S. federal income tax.

Dividends and Distributions to Shareholders

Dividends from net investment income and distributions of any net realized capital gains of each Fund are declared and paid annually and at other times as may be required to satisfy tax or regulatory requirements.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. As a result, net investment income and net realized capital gains on investment transactions for a reporting period may differ significantly from distributions during such period.

3. Federal Income Tax Information

At March 31, 2024, the aggregate cost of investments and the unrealized appreciation (depreciation) in the value of all investments owned by the Fund(s), as computed on a U.S. federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Blend Fund	$	648,386,981	$	126,633,393	$	(39,085,622	)	$	87,547,771
Dynamic Bond Fund		246,580,791		2,473,135		(18,160,591	)		(15,687,456	)
Equity Fund		636,870,249		237,766,230		(2,985,349	)		234,780,881
Equity Rotation Fund		51,423,273		7,237,847		(1,035,444	)		6,202,403
High Yield Fund		53,215,378		838,387		(2,092,436	)		(1,254,049	)
Inflation-Protected and Income Fund		184,830,652		722,445		(5,540,194	)		(4,817,749	)
iShares 60/40 Allocation Fund		42,009,896		3,151,213		(1,111,529	)		2,039,684
iShares 80/20 Allocation Fund		62,701,564		8,103,774		(534,349	)		7,569,425
Managed Bond Fund		783,345,612		4,147,204		(53,181,320	)		(49,034,116	)
Short-Duration Bond Fund		123,612,653		368,162		(5,367,644	)		(4,999,482	)
Small Cap Equity Fund		84,913,138		48,479,513		(4,150,697	)		44,328,816
Strategic Emerging Markets Fund		42,929,681		6,643,272		(2,455,666	)		4,187,606

4. New Accounting Pronouncements

In December 2022, FASB issued Accounting Standards Update 2022-06, “Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848” (“ASU 2022-06”). ASU 2022-06 is an update of ASU 2020-04, which responded to concerns about structural risks of interbank offered rates, and particularly the risk of cessation of LIBOR. ASU 2020-04 provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. ASU 2020-04 is elective and applies to all entities, subject to meeting certain criteria, that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2022-06 defers the sunset date provision included in Topic 848. The amendments in this update are effective immediately through December 31, 2024, for all entities. Management does not expect ASU 2022-06 to have a material impact on the financial statements.

Notes to Portfolio of Investments (Unaudited) (Continued)

5. Russia-Ukraine War

In February 2022, Russia commenced a large-scale military attack on Ukraine. The outbreak of hostilities between the two countries could result in more widespread conflict and could have a severe adverse effect on the regional and the global financial markets and economies. One or more of the Funds hold positions in securities or other instruments that are economically tied to Russia. Investments in Russia are subject to political, economic, legal, market, and currency risks, as well as the risks related to the economic sanctions on Russia, Russian individuals, and Russian corporate and banking entities imposed by the United States, other countries, and certain international organizations. Such sanctions — which affect companies in many sectors, including energy, financial services, and defense, among others — could adversely affect the global energy and financial markets and, thus, could affect the value of a Fund's investments, even beyond any direct exposure the Fund may have to Russian issuers or the adjoining geographic regions. These sanctions and any other intergovernmental actions (including retaliatory actions by the Russian government) may also result in a decline in the value and liquidity of Russian securities and a weakening of the ruble, and will impair a Fund's ability to buy, sell, receive, or deliver Russian securities. In addition, certain transactions have been or may be prohibited and/or existing investments have or may become illiquid (e.g., because transacting in certain existing investments is prohibited), which could cause a Fund to sell other portfolio holdings at a disadvantageous time or price in order to meet shareholder redemptions.

MML Series Investment Fund II NPORT-PMML iShares 80/20 Allocation Fund (Mar 2024 report)