MML Series Investment Fund NPORTP MML Mid Cap Value Fund (Sep 2024 report)

MML Conservative Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 41.2%
MML Blue Chip Growth Fund, Initial Class (a)		585,345	$	11,156,681
MML Equity Income Fund, Initial Class (a)		845,023		8,796,688
MML Focused Equity Fund, Class II (a)		1,984,846		15,481,797
MML Foreign Fund, Initial Class (a)		439,865		4,552,604
MML Fundamental Equity Fund, Class II (a)		647,123		7,338,373
MML Fundamental Value Fund, Class II (a)		714,747		9,191,652
MML Global Fund, Class I (a)		1,230,987		5,477,893
MML Income & Growth Fund, Initial Class (a)		373,656		3,773,923
MML International Equity Fund, Class II (a)		1,265,835		14,114,056
MML Large Cap Growth Fund, Initial Class (a)		547,775		8,621,982
MML Mid Cap Growth Fund, Initial Class (a)		577,140		6,481,286
MML Mid Cap Value Fund, Initial Class (a)		590,045		4,932,775
MML Small Cap Growth Equity Fund, Initial Class (a)		129,527		1,423,417
MML Small Company Value Fund, Class II (a)		292,271		2,636,289
MML Small/Mid Cap Value Fund, Initial Class (a)		170,372		1,569,128
MML Strategic Emerging Markets Fund, Class II (a)		362,543		2,066,495
				107,615,039
Fixed Income Funds — 58.9%
Invesco V.I. Global Strategic Income Fund, Series I (b)		1,174,927		5,334,171
MML Dynamic Bond Fund, Class II (a)		3,683,049		31,048,102
MML High Yield Fund, Class II (a)		86,443		763,291
MML Inflation-Protected and Income Fund, Initial Class (a)		688,349		6,057,469
MML Managed Bond Fund, Initial Class (a)		4,508,731		49,754,411
MML Short-Duration Bond Fund, Class II (a)		1,531,991		13,895,159
MML Total Return Bond Fund, Class II (a)		4,775,289		43,407,375
PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio, Institutional Shares		443,066		3,553,391
				153,813,369

TOTAL MUTUAL FUNDS (Cost $271,492,349)				261,428,408

TOTAL LONG-TERM INVESTMENTS (Cost $271,492,349)				261,428,408

TOTAL INVESTMENTS — 100.1% (Cost $271,492,349) (c)				261,428,408

Other Assets/(Liabilities) — (0.1)%				(233,882)

NET ASSETS — 100.0%			$	261,194,526

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Affiliated issuer.

(b)	Non-income producing security.

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

MML Balanced Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 51.3%
MML Blue Chip Growth Fund, Initial Class (a)		878,219	$	16,738,848
MML Equity Income Fund, Initial Class (a)		1,284,305		13,369,612
MML Focused Equity Fund, Class II (a)		3,015,610		23,521,755
MML Foreign Fund, Initial Class (a)		661,055		6,841,923
MML Fundamental Equity Fund, Class II (a)		971,432		11,016,034
MML Fundamental Value Fund, Class II (a)		1,067,629		13,729,706
MML Global Fund, Class I (a)		1,853,193		8,246,711
MML Income & Growth Fund, Initial Class (a)		573,532		5,792,674
MML International Equity Fund, Class II (a)		1,875,672		20,913,741
MML Large Cap Growth Fund, Initial Class (a)		825,247		12,989,382
MML Mid Cap Growth Fund, Initial Class (a)		858,428		9,640,144
MML Mid Cap Value Fund, Initial Class (a)		887,767		7,421,736
MML Small Cap Growth Equity Fund, Initial Class (a)		193,726		2,128,915
MML Small Company Value Fund, Class II (a)		438,260		3,953,108
MML Small/Mid Cap Value Fund, Initial Class (a)		253,195		2,331,921
MML Strategic Emerging Markets Fund, Class II (a)		544,754		3,105,099
				161,741,309
Fixed Income Funds — 48.8%
Invesco V.I. Global Strategic Income Fund, Series I (b)		1,175,899		5,338,580
MML Dynamic Bond Fund, Class II (a)		3,689,157		31,099,594
MML High Yield Fund, Class II (a)		86,514		763,915
MML Inflation-Protected and Income Fund, Initial Class (a)		688,919		6,062,489
MML Managed Bond Fund, Initial Class (a)		4,502,983		49,690,986
MML Short-Duration Bond Fund, Class II (a)		1,533,229		13,906,391
MML Total Return Bond Fund, Class II (a)		4,775,178		43,406,365
PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio, Institutional Shares		477,989		3,833,468
				154,101,788

TOTAL MUTUAL FUNDS (Cost $323,886,604)				315,843,097

TOTAL LONG-TERM INVESTMENTS (Cost $323,886,604)				315,843,097

TOTAL INVESTMENTS — 100.1% (Cost $323,886,604) (c)				315,843,097

Other Assets/(Liabilities) — (0.1)%				(275,617)

NET ASSETS — 100.0%			$	315,567,480

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Affiliated issuer.

(b)	Non-income producing security.

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

MML Moderate Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 60.9%
MML Blue Chip Growth Fund, Initial Class (a)		3,617,583	$	68,951,140
MML Equity Income Fund, Initial Class (a)		5,282,058		54,986,220
MML Focused Equity Fund, Class II (a)		12,456,476		97,160,517
MML Foreign Fund, Initial Class (a)		2,721,175		28,164,165
MML Fundamental Equity Fund, Class II (a)		3,919,570		44,447,927
MML Fundamental Value Fund, Class II (a)		4,384,038		56,378,728
MML Global Fund, Class I (a)		7,597,882		33,810,574
MML Income & Growth Fund, Initial Class (a)		2,481,682		25,064,985
MML International Equity Fund, Class II (a)		7,628,592		85,058,804
MML Large Cap Growth Fund, Initial Class (a)		3,316,642		52,203,944
MML Mid Cap Growth Fund, Initial Class (a)		3,558,281		39,959,495
MML Mid Cap Value Fund, Initial Class (a)		3,621,469		30,275,478
MML Small Cap Growth Equity Fund, Initial Class (a)		795,511		8,742,123
MML Small Company Value Fund, Class II (a)		1,803,542		16,267,947
MML Small/Mid Cap Value Fund, Initial Class (a)		1,048,683		9,658,374
MML Strategic Emerging Markets Fund, Class II (a)		2,243,867		12,790,042
				663,920,463
Fixed Income Funds — 39.2%
Invesco V.I. Global Strategic Income Fund, Series I (b)		3,225,566		14,644,068
MML Dynamic Bond Fund, Class II (a)		10,096,555		85,113,955
MML High Yield Fund, Class II (a)		237,311		2,095,452
MML Inflation-Protected and Income Fund, Initial Class (a)		1,889,614		16,628,600
MML Managed Bond Fund, Initial Class (a)		12,433,040		137,200,160
MML Short-Duration Bond Fund, Class II (a)		4,213,651		38,217,811
MML Total Return Bond Fund, Class II (a)		13,334,832		121,213,624
PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio, Institutional Shares		1,460,354		11,712,039
				426,825,709

TOTAL MUTUAL FUNDS (Cost $1,096,928,941)				1,090,746,172

TOTAL LONG-TERM INVESTMENTS (Cost $1,096,928,941)				1,090,746,172

TOTAL INVESTMENTS — 100.1% (Cost $1,096,928,941) (c)				1,090,746,172

Other Assets/(Liabilities) — (0.1)%				(898,637)

NET ASSETS — 100.0%			$	1,089,847,535

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Affiliated issuer.

(b)	Non-income producing security.

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

MML Growth Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 75.7%
MML Blue Chip Growth Fund, Initial Class (a)		3,961,178	$	75,500,051
MML Equity Income Fund, Initial Class (a)		5,842,146		60,816,744
MML Focused Equity Fund, Class II (a)		13,738,197		107,157,937
MML Foreign Fund, Initial Class (a)		2,987,655		30,922,234
MML Fundamental Equity Fund, Class II (a)		4,318,065		48,966,857
MML Fundamental Value Fund, Class II (a)		4,779,310		61,461,921
MML Global Fund, Class I (a)		8,363,029		37,215,481
MML Income & Growth Fund, Initial Class (a)		2,798,738		28,267,255
MML International Equity Fund, Class II (a)		8,424,361		93,931,630
MML Large Cap Growth Fund, Initial Class (a)		3,681,388		57,945,052
MML Mid Cap Growth Fund, Initial Class (a)		3,908,491		43,892,352
MML Mid Cap Value Fund, Initial Class (a)		3,992,637		33,378,448
MML Small Cap Growth Equity Fund, Initial Class (a)		875,777		9,624,193
MML Small Company Value Fund, Class II (a)		2,086,984		18,824,595
MML Small/Mid Cap Value Fund, Initial Class (a)		1,155,014		10,637,682
MML Strategic Emerging Markets Fund, Class II (a)		2,635,688		15,023,419
				733,565,851
Fixed Income Funds — 24.4%
Invesco V.I. Global Strategic Income Fund, Series I (b)		1,775,184		8,059,334
MML Dynamic Bond Fund, Class II (a)		5,557,773		46,852,023
MML High Yield Fund, Class II (a)		130,606		1,153,247
MML Inflation-Protected and Income Fund, Initial Class (a)		1,039,996		9,151,961
MML Managed Bond Fund, Initial Class (a)		6,819,302		75,251,859
MML Short-Duration Bond Fund, Class II (a)		2,363,814		21,439,797
MML Total Return Bond Fund, Class II (a)		7,263,142		66,021,958
PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio, Institutional Shares		1,016,468		8,152,073
				236,082,252

TOTAL MUTUAL FUNDS (Cost $958,512,922)				969,648,103

TOTAL LONG-TERM INVESTMENTS (Cost $958,512,922)				969,648,103

TOTAL INVESTMENTS — 100.1% (Cost $958,512,922) (c)				969,648,103

Other Assets/(Liabilities) — (0.1)%				(656,493)

NET ASSETS — 100.0%			$	968,991,610

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Affiliated issuer.

(b)	Non-income producing security.

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

MML Aggressive Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 90.5%
MML Blue Chip Growth Fund, Initial Class (a)		640,012	$	12,198,633
MML Equity Income Fund, Initial Class (a)		936,541		9,749,395
MML Focused Equity Fund, Class II (a)		2,201,798		17,174,023
MML Foreign Fund, Initial Class (a)		503,597		5,212,230
MML Fundamental Equity Fund, Class II (a)		712,801		8,083,167
MML Fundamental Value Fund, Class II (a)		782,721		10,065,795
MML Global Fund, Class I (a)		1,348,881		6,002,522
MML Income & Growth Fund, Initial Class (a)		422,085		4,263,056
MML International Equity Fund, Class II (a)		1,405,326		15,669,383
MML Large Cap Growth Fund, Initial Class (a)		604,773		9,519,132
MML Mid Cap Growth Fund, Initial Class (a)		635,390		7,135,426
MML Mid Cap Value Fund, Initial Class (a)		644,178		5,385,328
MML Small Cap Growth Equity Fund, Initial Class (a)		141,525		1,555,261
MML Small Company Value Fund, Class II (a)		321,145		2,896,724
MML Small/Mid Cap Value Fund, Initial Class (a)		187,409		1,726,037
MML Strategic Emerging Markets Fund, Class II (a)		436,613		2,488,693
				119,124,805
Fixed Income Funds — 9.6%
Invesco V.I. Global Strategic Income Fund, Series I (b)		95,575		433,911
MML Dynamic Bond Fund, Class II (a)		290,053		2,445,147
MML High Yield Fund, Class II (a)		7,032		62,089
MML Inflation-Protected and Income Fund, Initial Class (a)		55,992		492,733
MML Managed Bond Fund, Initial Class (a)		350,550		3,868,367
MML Short-Duration Bond Fund, Class II (a)		121,918		1,105,793
MML Total Return Bond Fund, Class II (a)		376,980		3,426,751
PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio, Institutional Shares		101,161		811,310
				12,646,101

TOTAL MUTUAL FUNDS (Cost $128,588,049)				131,770,906

TOTAL LONG-TERM INVESTMENTS (Cost $128,588,049)				131,770,906

TOTAL INVESTMENTS — 100.1% (Cost $128,588,049) (c)				131,770,906

Other Assets/(Liabilities) — (0.1)%				(108,952)

NET ASSETS — 100.0%			$	131,661,954

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Affiliated issuer.

(b)	Non-income producing security.

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

MML American Funds Growth Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 100.1%
American Funds Insurance Series Growth Fund, Class 1		2,348,817	$	280,613,192
				280,613,192

TOTAL MUTUAL FUNDS (Cost $212,281,151)				280,613,192

TOTAL INVESTMENTS — 100.1% (Cost $212,281,151) (a)				280,613,192

Other Assets/(Liabilities) — (0.1)%				(306,923)

NET ASSETS — 100.0%			$	280,306,269

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

MML American Funds Core Allocation Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%

Equity Funds — 66.0%
American Funds Insurance Series® Growth-Income Fund, Class 1		2,547,670	$	174,770,195
American Funds Insurance Series® International Fund, Class 1		3,223,518		63,471,065
American Funds Insurance Series® Washington Mutual Investors Fund, Class 1		10,190,438		173,950,779
				412,192,039
Fixed Income Funds — 34.1%
American Funds Insurance Series® The Bond Fund Of America, Class 1		21,499,919		213,279,193

TOTAL MUTUAL FUNDS (Cost $549,328,221)				625,471,232

TOTAL LONG-TERM INVESTMENTS (Cost $549,328,221)				625,471,232

TOTAL INVESTMENTS — 100.1% (Cost $549,328,221) (a)				625,471,232

Other Assets/(Liabilities) — (0.1)%				(756,323)

NET ASSETS — 100.0%			$	624,714,909

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

MML Blue Chip Growth Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.8%

COMMON STOCK — 97.6%
Communication Services — 15.1%
Alphabet, Inc. Class A		37,302	$	6,186,537
Alphabet, Inc. Class C		174,324		29,145,230
Meta Platforms, Inc. Class A		42,778		24,487,838
Netflix, Inc. (a)		12,311		8,731,823
Sea Ltd. ADR (a)		16,948		1,597,857
T-Mobile US, Inc.		24,327		5,020,120
				75,169,405
Consumer Discretionary — 14.5%
Amazon.com, Inc. (a)		211,187		39,350,474
Booking Holdings, Inc.		1,015		4,275,302
Carvana Co. (a)		40,544		7,059,116
Chipotle Mexican Grill, Inc. (a)		79,176		4,562,121
DoorDash, Inc., Class A (a)		11,801		1,684,357
Lululemon Athletica, Inc. (a)		2,593		703,610
NIKE, Inc. Class B		2,896		256,006
Ross Stores, Inc.		16,311		2,454,969
Tesla, Inc. (a)		37,270		9,750,950
TJX Cos., Inc.		18,490		2,173,315
				72,270,220
Consumer Staples — 1.2%
Colgate-Palmolive Co.		20,106		2,087,204
Dollar General Corp.		17,464		1,476,930
Mondelez International, Inc. Class A		14,234		1,048,619
Procter & Gamble Co.		9,026		1,563,303
				6,176,056
Energy — 0.2%
Schlumberger NV		26,957		1,130,846
Financials — 8.6%
Adyen NV ADR (a) (b)		64,851		1,013,621
Charles Schwab Corp.		22,192		1,438,264
Chubb Ltd.		18,075		5,212,649
Fiserv, Inc. (a)		6,163		1,107,183
Goldman Sachs Group, Inc.		4,116		2,037,873
Marsh & McLennan Cos., Inc.		10,147		2,263,694
Mastercard, Inc. Class A		23,645		11,675,901
Morgan Stanley		19,759		2,059,678
MSCI, Inc.		798		465,178
S&P Global, Inc.		4,308		2,225,599

MML Blue Chip Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Visa, Inc. Class A		47,994	$	13,195,950
				42,695,590
Health Care — 10.2%
AstraZeneca PLC Sponsored ADR		13,454		1,048,201
Danaher Corp.		15,088		4,194,766
Elevance Health, Inc.		3,406		1,771,120
Eli Lilly & Co.		19,803		17,544,270
Humana, Inc.		5,011		1,587,184
Intuitive Surgical, Inc. (a)		16,352		8,033,247
Stryker Corp.		7,585		2,740,157
Thermo Fisher Scientific, Inc.		6,390		3,952,662
UnitedHealth Group, Inc.		14,214		8,310,642
Zoetis, Inc.		9,341		1,825,045
				51,007,294
Industrials — 1.9%
Cintas Corp.		5,628		1,158,693
GE Vernova, Inc. (a)		4,304		1,097,434
General Electric Co.		19,911		3,754,816
Old Dominion Freight Line, Inc.		7,858		1,560,913
TransDigm Group, Inc.		1,071		1,528,456
Veralto Corp.		3,266		365,335
				9,465,647
Information Technology — 44.1%
Advanced Micro Devices, Inc. (a)		17,745		2,911,600
Apple, Inc.		201,019		46,837,427
ASML Holding NV		5,854		4,877,845
Atlassian Corp. Class A (a)		6,106		969,694
Bill Holdings, Inc. (a)		9,719		512,774
Broadcom, Inc.		12,869		2,219,903
Canva, Inc. (Acquired 8/16/21-12/17/21, Cost $582,930) (a) (c) (d) (e)		342		379,928
Confluent, Inc. Class A (a)		14,806		301,746
Crowdstrike Holdings, Inc. Class A (a)		3,982		1,116,832
Datadog, Inc. Class A (a)		6,111		703,132
Fortinet, Inc. (a)		3,959		307,020
Gusto, Inc. (Acquired 10/04/21, Cost $193,055) (a) (c) (d) (e)		6,706		124,665
Intuit, Inc.		6,606		4,102,326
Lam Research Corp.		1,097		895,240
Microsoft Corp.		147,360		63,409,008
MongoDB, Inc. (a)		5,389		1,456,916
Monolithic Power Systems, Inc.		3,512		3,246,844
NVIDIA Corp.		482,916		58,645,319
Roper Technologies, Inc.		5,200		2,893,488
ServiceNow, Inc. (a)		11,785		10,540,386
Shopify, Inc. Class A (a)		37,376		2,995,313
Snowflake, Inc. Class A (a)		4,515		518,593
Synopsys, Inc. (a)		8,885		4,499,275
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR		12,561		2,181,469
TE Connectivity PLC (a)		13,759		2,077,471
Texas Instruments, Inc.		3,774		779,595
				219,503,809
Materials — 0.9%
Linde PLC (LIN US)		4,472		2,132,518

MML Blue Chip Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Sherwin-Williams Co.		5,727	$	2,185,824
				4,318,342
Utilities — 0.9%
Constellation Energy Corp.		16,469		4,282,269

TOTAL COMMON STOCK (Cost $276,310,675)				486,019,478

PREFERRED STOCK — 0.2%
Information Technology — 0.2%
Canva, Inc., Series A (Acquired 11/04/21-12/17/21, Cost $37,502) (a) (c) (d) (e)		22		24,440
Canva, Inc., Series A-3 (Acquired 12/17/21, Cost $3,408) (a) (c) (d) (e)		2		2,222
Databricks, Inc., Series G (Acquired 2/01/21, Cost $172,224) (a) (c) (d) (e)		2,913		254,509
Databricks, Inc., Series H (Acquired 8/31/21, Cost $542,974) (a) (c) (d) (e)		7,389		645,577
Gusto, Inc., Series E (Acquired 7/13/21, Cost $254,865) (a) (c) (d) (e)		8,385		155,877
				1,082,625

TOTAL PREFERRED STOCK (Cost $1,010,973)				1,082,625

TOTAL EQUITIES (Cost $277,321,648)				487,102,103


	Principal Amount
BONDS & NOTES — 0.2%
CORPORATE DEBT — 0.2%
Retail — 0.2%
Carvana Co.
12.000% 12/01/28 (f)	$	242,593		254,772
13.000% 6/01/30 (f)		367,750		399,883
14.000% 6/01/31 (f)		438,222		516,189
				1,170,844

TOTAL CORPORATE DEBT (Cost $1,159,190)				1,170,844

TOTAL BONDS & NOTES (Cost $1,159,190)				1,170,844


	Number of Shares
EXCHANGE-TRADED FUNDS — 1.5%
iShares Russell 1000 Growth ETF		5,091		1,911,059
SPDR S&P 500 ETF Trust		9,673		5,549,980

TOTAL EXCHANGE-TRADED FUNDS (Cost $7,432,795)				7,461,039

TOTAL LONG-TERM INVESTMENTS (Cost $285,913,633)				495,733,986

MML Blue Chip Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 0.8%

Investment of Cash Collateral from Securities Loaned — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		832,224	$	832,224
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		112		112

	Principal Amount
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (h)	$	2,797,848		2,797,848

TOTAL SHORT-TERM INVESTMENTS (Cost $3,630,184)				3,630,184

TOTAL INVESTMENTS — 100.3% (Cost $289,543,817) (i)				499,364,170

Other Assets/(Liabilities) — (0.3)%				(1,312,333)

NET ASSETS — 100.0%			$	498,051,837

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 September 30, 2024, was $812,979 or 0.16% of net assets. (Note 2).

(c)	Restricted security. Certain securities are restricted to resale. At September 30, 2024, these securities amounted to a value of $1,587,218 or 0.32% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(d)	Investment is valued using significant unobservable inputs.

(e)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2024, these securities amounted to a value of $1,587,218 or 0.32% of net assets.

(f)

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 September 30, 2024, the aggregate market value of these securities amounted to $1,170,844 or 0.24% of net assets.

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

(h)	Maturity value of $2,797,966. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $2,853,812.

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

MML Equity Income Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.3%

COMMON STOCK — 98.6%
Communication Services — 3.7%
AT&T, Inc.		15,231	$	335,082
Comcast Corp. Class A		53,539		2,236,324
News Corp. Class A		200,018		5,326,479
News Corp. Class B		7,490		209,346
Verizon Communications, Inc.		25,335		1,137,795
Walt Disney Co.		37,956		3,650,988
				12,896,014
Consumer Discretionary — 2.8%
Home Depot, Inc.		600		243,120
Kohl's Corp. (a)		52,933		1,116,886
Las Vegas Sands Corp.		78,454		3,949,374
Mattel, Inc. (b)		87,467		1,666,246
TJX Cos., Inc.		9,760		1,147,191
Volkswagen AG ADR		150,526		1,589,555
				9,712,372
Consumer Staples — 9.0%
Colgate-Palmolive Co.		24,050		2,496,630
Conagra Brands, Inc.		90,960		2,958,019
Dollar General Corp.		11,600		981,012
Kenvue, Inc.		254,468		5,885,845
Kimberly-Clark Corp.		40,167		5,714,961
Mondelez International, Inc. Class A		5,061		372,844
Philip Morris International, Inc.		49,520		6,011,728
Tyson Foods, Inc. Class A		50,353		2,999,025
Walmart, Inc.		51,789		4,181,962
				31,602,026
Energy — 8.6%
Baker Hughes Co.		27,501		994,161
Chesapeake Energy Corp.		6,327		520,396
Chevron Corp.		4,586		675,380
ConocoPhillips		11,375		1,197,560
Enbridge, Inc.		34,966		1,419,969
EOG Resources, Inc.		16,301		2,003,882
EQT Corp.		55,026		2,016,153
Exxon Mobil Corp.		48,034		5,630,546
Hess Corp.		5,706		774,875
Marathon Oil Corp.		55,489		1,477,672
Schlumberger NV		11,100		465,645
Suncor Energy, Inc. (SU US)		66,200		2,444,104
TC Energy Corp.		34,749		1,652,315
TotalEnergies SE (a)		88,574		5,740,947

MML Equity Income Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
TotalEnergies SE Sponsored ADR (a)		15,083	$	974,663
Williams Cos., Inc.		42,023		1,918,350
				29,906,618
Financials — 21.5%
American International Group, Inc.		87,795		6,429,228
Apollo Global Management, Inc.		7,800		974,298
Bank of America Corp.		48,824		1,937,336
Bank of New York Mellon Corp.		6,300		452,718
Charles Schwab Corp.		79,198		5,132,822
Chubb Ltd.		24,882		7,175,720
Citigroup, Inc.		74,842		4,685,109
Equitable Holdings, Inc.		114,740		4,822,522
Fifth Third Bancorp		72,934		3,124,493
Fiserv, Inc. (b)		21,514		3,864,990
Hartford Financial Services Group, Inc.		42,092		4,950,440
Huntington Bancshares, Inc.		290,481		4,270,071
JP Morgan Chase & Co.		22,904		4,829,537
Loews Corp.		45,540		3,599,937
MetLife, Inc.		88,420		7,292,882
Morgan Stanley		9,982		1,040,524
US Bancorp		73,755		3,372,816
Wells Fargo & Co.		123,559		6,979,848
				74,935,291
Health Care — 16.8%
AbbVie, Inc.		4,274		844,030
AstraZeneca PLC Sponsored ADR		38,119		2,969,851
Becton Dickinson & Co.		24,933		6,011,346
Biogen, Inc. (b)		4,900		949,816
Bristol-Myers Squibb Co.		39,022		2,018,998
Cardinal Health, Inc.		4,918		543,537
Centene Corp. (b)		6,138		462,069
Cigna Group		11,288		3,910,615
CVS Health Corp.		60,594		3,810,151
Elevance Health, Inc.		15,083		7,843,160
GE HealthCare Technologies, Inc. (b)		9,764		916,351
Humana, Inc.		1,800		570,132
Johnson & Johnson		25,146		4,075,161
Medtronic PLC		37,812		3,404,214
Merck & Co., Inc.		10,719		1,217,250
Pfizer, Inc.		55,255		1,599,080
Sanofi SA		21,738		2,504,526
Sanofi SA ADR		13,237		762,848
Thermo Fisher Scientific, Inc.		1,800		1,113,426
UnitedHealth Group, Inc.		9,016		5,271,475
Viatris, Inc.		224,707		2,608,848
Zimmer Biomet Holdings, Inc.		47,655		5,144,357
				58,551,241
Industrials — 13.0%
3M Co.		8,987		1,228,523
Boeing Co. (b)		20,342		3,092,798
CSX Corp.		44,311		1,530,059
Cummins, Inc.		6,858		2,220,552
GE Vernova, Inc. (b)		7,497		1,911,585

MML Equity Income Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
General Electric Co.		37,609	$	7,092,305
Honeywell International, Inc.		4,669		965,129
L3Harris Technologies, Inc.		26,470		6,296,419
Norfolk Southern Corp.		7,597		1,887,854
Rockwell Automation, Inc.		2,378		638,398
Siemens AG Sponsored ADR		45,843		4,632,435
Southwest Airlines Co. (a)		100,203		2,969,015
Stanley Black & Decker, Inc.		51,414		5,662,224
Stericycle, Inc. (b)		17,463		1,065,243
Union Pacific Corp.		1,944		479,157
United Parcel Service, Inc. Class B		26,984		3,678,998
				45,350,694
Information Technology — 9.1%
Accenture PLC Class A		8,059		2,848,696
Advanced Micro Devices, Inc. (b)		3,389		556,067
Applied Materials, Inc.		18,544		3,746,815
Cisco Systems, Inc.		20,046		1,066,848
Intel Corp.		52,880		1,240,565
Microsoft Corp.		11,834		5,092,170
QUALCOMM, Inc.		39,986		6,799,619
Salesforce, Inc.		2,500		684,275
Samsung Electronics Co. Ltd.		58,204		2,758,599
TE Connectivity PLC (b)		24,315		3,671,322
Texas Instruments, Inc.		16,212		3,348,913
				31,813,889
Materials — 3.3%
CF Industries Holdings, Inc.		70,396		6,039,977
International Paper Co.		107,240		5,238,674
West Fraser Timber Co. Ltd. (WFG US)		1,500		146,040
				11,424,691
Real Estate — 4.4%
Equity Residential		68,460		5,097,532
Rayonier, Inc.		80,597		2,593,611
Rexford Industrial Realty, Inc.		38,445		1,934,168
Vornado Realty Trust		5,843		230,214
Weyerhaeuser Co.		161,987		5,484,880
				15,340,405
Utilities — 6.4%
Ameren Corp.		41,598		3,638,161
Atmos Energy Corp.		2,417		335,262
Dominion Energy, Inc.		67,511		3,901,461
NextEra Energy, Inc.		28,064		2,372,250
NiSource, Inc.		26,601		921,724
PG&E Corp.		26,000		514,020
Sempra		32,587		2,725,251
Southern Co.		86,434		7,794,618
				22,202,747

TOTAL COMMON STOCK (Cost $255,845,721)				343,735,988

MML Equity Income Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
PREFERRED STOCK — 0.7%
Consumer Discretionary — 0.5%
Dr. Ing hc F Porsche AG 3.234% (c)		20,517	$	1,632,881

Utilities — 0.2%
NextEra Energy, Inc. Convertible 6.926% (a)		15,955		739,674

TOTAL PREFERRED STOCK (Cost $2,733,318)				2,372,555

TOTAL EQUITIES (Cost $258,579,039)				346,108,543

TOTAL LONG-TERM INVESTMENTS (Cost $258,579,039)				346,108,543


SHORT-TERM INVESTMENTS — 1.1%
Investment of Cash Collateral from Securities Loaned — 0.4%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		1,324,754		1,324,754
Mutual Fund — 0.0%
T. Rowe Price Government Reserve Investment Fund		110		110

	Principal Amount
Repurchase Agreement — 0.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (e)	$	2,408,642		2,408,642

TOTAL SHORT-TERM INVESTMENTS (Cost $3,733,506)				3,733,506

TOTAL INVESTMENTS — 100.4% (Cost $262,312,545) (f)				349,842,049

Other Assets/(Liabilities) — (0.4)%				(1,338,331)

NET ASSETS — 100.0%			$	348,503,718

Abbreviation Legend

ADR	American Depositary Receipt

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 September 30, 2024, was $11,290,210 or 3.24% of net assets. The Fund received $10,527,498 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)	Non-income producing security.

(c)

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

(e)	Maturity value of $2,408,744. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $2,457,007.

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

MML Equity Index Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.4%

COMMON STOCK — 99.4%
Communication Services — 8.8%
Alphabet, Inc. Class A		76,723	$	12,724,510
Alphabet, Inc. Class C		62,896		10,515,582
AT&T, Inc.		93,893		2,065,646
Charter Communications, Inc. Class A (a)		1,271		411,906
Comcast Corp. Class A		50,586		2,112,977
Electronic Arts, Inc.		3,148		451,549
Fox Corp. Class A		2,942		124,535
Fox Corp. Class B		1,738		67,434
Interpublic Group of Cos., Inc.		4,918		155,556
Live Nation Entertainment, Inc. (a)		2,051		224,564
Match Group, Inc. (a)		3,377		127,786
Meta Platforms, Inc. Class A		28,609		16,376,936
Netflix, Inc. (a)		5,620		3,986,097
News Corp. Class A		4,996		133,043
News Corp. Class B		1,507		42,121
Omnicom Group, Inc.		2,562		264,885
Paramount Global Class B		7,788		82,709
T-Mobile US, Inc.		6,417		1,324,212
Take-Two Interactive Software, Inc. (a)		2,135		328,171
Verizon Communications, Inc.		55,123		2,475,574
Walt Disney Co.		23,749		2,284,416
Warner Bros Discovery, Inc. (a)		29,218		241,049
				56,521,258
Consumer Discretionary — 10.0%
Airbnb, Inc. Class A (a)		5,762		730,679
Amazon.com, Inc. (a)		122,320		22,791,886
Aptiv PLC (a)		3,480		250,595
AutoZone, Inc. (a)		224		705,609
Best Buy Co., Inc.		2,537		262,072
Booking Holdings, Inc.		439		1,849,121
BorgWarner, Inc.		3,001		108,906
Caesars Entertainment, Inc. (a)		2,851		119,001
CarMax, Inc. (a)		2,044		158,165
Carnival Corp. (a)		13,229		244,472
Chipotle Mexican Grill, Inc. (a)		17,933		1,033,299
Darden Restaurants, Inc.		1,551		254,566
Deckers Outdoor Corp. (a)		1,996		318,262
Domino's Pizza, Inc.		459		197,434
DR Horton, Inc.		3,843		733,129
eBay, Inc.		6,403		416,899
Expedia Group, Inc. (a)		1,632		241,569
Ford Motor Co.		51,128		539,912
Garmin Ltd.		2,014		354,524
General Motors Co.		14,718		659,955
Genuine Parts Co.		1,824		254,776

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Hasbro, Inc.		1,724	$	124,680
Hilton Worldwide Holdings, Inc.		3,227		743,824
Home Depot, Inc.		12,985		5,261,522
Las Vegas Sands Corp.		4,629		233,024
Lennar Corp. Class A		3,165		593,374
LKQ Corp.		3,447		137,604
Lowe's Cos., Inc.		7,462		2,021,083
Lululemon Athletica, Inc. (a)		1,509		409,467
Marriott International, Inc. Class A		3,060		760,716
McDonald's Corp.		9,394		2,860,567
MGM Resorts International (a)		3,023		118,169
Mohawk Industries, Inc. (a)		686		110,226
NIKE, Inc. Class B		15,733		1,390,797
Norwegian Cruise Line Holdings Ltd. (a) (b)		5,652		115,923
NVR, Inc. (a)		40		392,472
O'Reilly Automotive, Inc. (a)		760		875,216
Pool Corp.		501		188,777
PulteGroup, Inc.		2,718		390,115
Ralph Lauren Corp.		514		99,649
Ross Stores, Inc.		4,368		657,428
Royal Caribbean Cruises Ltd.		3,101		549,993
Starbucks Corp.		14,839		1,446,654
Tapestry, Inc.		3,027		142,208
Tesla, Inc. (a)		36,333		9,505,803
TJX Cos., Inc.		14,799		1,739,474
Tractor Supply Co.		1,413		411,084
Ulta Beauty, Inc. (a)		625		243,200
Wynn Resorts Ltd.		1,225		117,453
Yum! Brands, Inc.		3,682		514,412
				64,379,745
Consumer Staples — 5.9%
Altria Group, Inc.		22,343		1,140,387
Archer-Daniels-Midland Co.		6,261		374,032
Brown-Forman Corp. Class B		2,358		116,014
Bunge Global SA		1,865		180,234
Campbell Soup Co.		2,592		126,801
Church & Dwight Co., Inc.		3,206		335,732
Clorox Co.		1,622		264,240
Coca-Cola Co.		50,793		3,649,985
Colgate-Palmolive Co.		10,700		1,110,767
Conagra Brands, Inc.		6,298		204,811
Constellation Brands, Inc. Class A		2,052		528,780
Costco Wholesale Corp.		5,805		5,146,249
Dollar General Corp.		2,879		243,477
Dollar Tree, Inc. (a)		2,646		186,067
Estee Lauder Cos., Inc. Class A		3,051		304,154
General Mills, Inc.		7,289		538,293
Hershey Co.		1,934		370,902
Hormel Foods Corp.		3,824		121,221
J.M. Smucker Co.		1,399		169,419
Kellanova		3,513		283,534
Kenvue, Inc.		25,079		580,077
Keurig Dr. Pepper, Inc.		13,851		519,135
Kimberly-Clark Corp.		4,410		627,455
Kraft Heinz Co.		11,558		405,801
Kroger Co.		8,696		498,281
Lamb Weston Holdings, Inc.		1,881		121,776

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
McCormick & Co., Inc.		3,300	$	271,590
Molson Coors Beverage Co. Class B		2,301		132,353
Mondelez International, Inc. Class A		17,492		1,288,636
Monster Beverage Corp. (a)		9,235		481,790
PepsiCo, Inc.		17,987		3,058,689
Philip Morris International, Inc.		20,360		2,471,704
Procter & Gamble Co.		30,826		5,339,063
Sysco Corp.		6,440		502,706
Target Corp.		6,058		944,200
Tyson Foods, Inc. Class A		3,743		222,933
Walgreens Boots Alliance, Inc.		9,433		84,520
Walmart, Inc.		56,878		4,592,898
				37,538,706
Energy — 3.3%
APA Corp.		4,743		116,014
Baker Hughes Co.		13,009		470,275
Chevron Corp.		22,273		3,280,145
ConocoPhillips		15,206		1,600,888
Coterra Energy, Inc.		9,681		231,860
Devon Energy Corp.		8,200		320,784
Diamondback Energy, Inc.		2,453		422,897
EOG Resources, Inc.		7,446		915,337
EQT Corp.		7,779		285,023
Exxon Mobil Corp.		58,178		6,819,625
Halliburton Co.		11,561		335,847
Hess Corp.		3,619		491,460
Kinder Morgan, Inc.		25,285		558,546
Marathon Oil Corp.		7,325		195,065
Marathon Petroleum Corp.		4,383		714,034
Occidental Petroleum Corp.		8,817		454,428
ONEOK, Inc.		7,648		696,962
Phillips 66		5,481		720,477
Schlumberger NV		18,595		780,060
Targa Resources Corp.		2,869		424,641
Valero Energy Corp.		4,195		566,451
Williams Cos., Inc.		15,962		728,665
				21,129,484
Financials — 12.9%
Aflac, Inc.		6,600		737,880
Allstate Corp.		3,458		655,810
American Express Co.		7,354		1,994,405
American International Group, Inc.		8,432		617,475
Ameriprise Financial, Inc.		1,286		604,176
Aon PLC Class A		2,845		984,342
Arch Capital Group Ltd. (a)		4,904		548,660
Arthur J Gallagher & Co.		2,869		807,251
Assurant, Inc.		678		134,827
Bank of America Corp.		88,401		3,507,752
Bank of New York Mellon Corp.		9,663		694,383
Berkshire Hathaway, Inc. Class B (a)		23,987		11,040,257
BlackRock, Inc.		1,823		1,730,957
Blackstone, Inc.		9,415		1,441,719
Brown & Brown, Inc.		3,100		321,160
Capital One Financial Corp.		5,000		748,650
Cboe Global Markets, Inc.		1,370		280,672

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Charles Schwab Corp.		19,562	$	1,267,813
Chubb Ltd.		4,919		1,418,590
Cincinnati Financial Corp.		2,046		278,502
Citigroup, Inc.		24,982		1,563,873
Citizens Financial Group, Inc.		5,870		241,081
CME Group, Inc.		4,715		1,040,365
Corpay, Inc. (a)		909		284,299
Discover Financial Services		3,288		461,274
Erie Indemnity Co. Class A		327		176,521
Everest Group Ltd.		567		222,168
FactSet Research Systems, Inc.		498		229,005
Fidelity National Information Services, Inc.		7,144		598,310
Fifth Third Bancorp		8,863		379,691
Fiserv, Inc. (a)		7,539		1,354,381
Franklin Resources, Inc.		3,950		79,592
Global Payments, Inc.		3,332		341,263
Globe Life, Inc.		1,176		124,550
Goldman Sachs Group, Inc.		4,135		2,047,280
Hartford Financial Services Group, Inc.		3,837		451,270
Huntington Bancshares, Inc.		19,092		280,652
Intercontinental Exchange, Inc.		7,518		1,207,692
Invesco Ltd.		5,926		104,061
Jack Henry & Associates, Inc.		960		169,478
JP Morgan Chase & Co.		37,257		7,856,011
KeyCorp.		12,154		203,579
KKR & Co., Inc.		8,832		1,153,283
Loews Corp.		2,392		189,088
M&T Bank Corp.		2,187		389,548
MarketAxess Holdings, Inc.		494		126,563
Marsh & McLennan Cos., Inc.		6,439		1,436,476
Mastercard, Inc. Class A		10,804		5,335,015
MetLife, Inc.		7,703		635,343
Moody's Corp.		2,051		973,384
Morgan Stanley		16,313		1,700,467
MSCI, Inc.		1,030		600,418
Nasdaq, Inc.		5,419		395,641
Northern Trust Corp.		2,640		237,679
PayPal Holdings, Inc. (a)		13,387		1,044,588
PNC Financial Services Group, Inc.		5,205		962,144
Principal Financial Group, Inc.		2,790		239,661
Progressive Corp.		7,669		1,946,085
Prudential Financial, Inc.		4,675		566,142
Raymond James Financial, Inc.		2,427		297,210
Regions Financial Corp.		11,983		279,563
S&P Global, Inc.		4,193		2,166,188
State Street Corp.		3,910		345,918
Synchrony Financial		5,175		258,129
T. Rowe Price Group, Inc.		2,915		317,531
Travelers Cos., Inc.		2,985		698,848
Truist Financial Corp.		17,536		750,015
US Bancorp		20,434		934,447
Visa, Inc. Class A		21,874		6,014,256
W. R. Berkley Corp.		3,937		223,346
Wells Fargo & Co.		44,572		2,517,872
Willis Towers Watson PLC		1,330		391,725
				82,358,250

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care — 11.5%
Abbott Laboratories		22,784	$	2,597,604
AbbVie, Inc.		23,130		4,567,712
Agilent Technologies, Inc.		3,821		567,342
Align Technology, Inc. (a)		922		234,483
Amgen, Inc.		7,036		2,267,070
Baxter International, Inc.		6,713		254,893
Becton Dickinson & Co.		3,785		912,563
Bio-Techne Corp.		2,076		165,935
Biogen, Inc. (a)		1,907		369,653
Boston Scientific Corp. (a)		19,284		1,615,999
Bristol-Myers Squibb Co.		26,548		1,373,593
Cardinal Health, Inc.		3,193		352,890
Catalent, Inc. (a)		2,384		144,399
Cencora, Inc.		2,284		514,083
Centene Corp. (a)		6,888		518,529
Charles River Laboratories International, Inc. (a)		679		133,743
Cigna Group		3,661		1,268,317
The Cooper Cos., Inc. (a)		2,618		288,870
CVS Health Corp.		16,473		1,035,822
Danaher Corp.		8,417		2,340,094
DaVita, Inc. (a)		604		99,014
Dexcom, Inc. (a)		5,239		351,223
Edwards Lifesciences Corp. (a)		7,888		520,529
Elevance Health, Inc.		3,037		1,579,240
Eli Lilly & Co.		10,330		9,151,760
GE HealthCare Technologies, Inc. (a)		5,980		561,223
Gilead Sciences, Inc.		16,303		1,366,843
HCA Healthcare, Inc.		2,433		988,844
Henry Schein, Inc. (a)		1,659		120,941
Hologic, Inc. (a)		3,042		247,801
Humana, Inc.		1,577		499,499
IDEXX Laboratories, Inc. (a)		1,078		544,627
Incyte Corp. (a)		2,094		138,413
Insulet Corp. (a)		923		214,828
Intuitive Surgical, Inc. (a)		4,645		2,281,949
IQVIA Holdings, Inc. (a)		2,268		537,448
Johnson & Johnson		31,523		5,108,617
Labcorp Holdings, Inc.		1,099		245,605
McKesson Corp.		1,698		839,525
Medtronic PLC		16,795		1,512,054
Merck & Co., Inc.		33,193		3,769,397
Mettler-Toledo International, Inc. (a)		278		416,917
Moderna, Inc. (a)		4,392		293,517
Molina Healthcare, Inc. (a)		767		264,278
Pfizer, Inc.		74,205		2,147,493
Quest Diagnostics, Inc.		1,463		227,131
Regeneron Pharmaceuticals, Inc. (a)		1,390		1,461,224
ResMed, Inc.		1,924		469,687
Revvity, Inc.		1,615		206,316
Solventum Corp. (a)		1,820		126,890
STERIS PLC		1,291		313,119
Stryker Corp.		4,490		1,622,057
Teleflex, Inc.		621		153,586
Thermo Fisher Scientific, Inc.		5,002		3,094,087
UnitedHealth Group, Inc.		12,092		7,069,951
Universal Health Services, Inc. Class B		779		178,399
Vertex Pharmaceuticals, Inc. (a)		3,380		1,571,970

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Viatris, Inc.		15,686	$	182,114
Waters Corp. (a)		777		279,635
West Pharmaceutical Services, Inc.		950		285,152
Zimmer Biomet Holdings, Inc.		2,667		287,903
Zoetis, Inc.		5,933		1,159,190
				74,013,590
Industrials — 8.5%
3M Co.		7,194		983,420
A.O. Smith Corp.		1,571		141,123
Allegion PLC		1,141		166,289
Amentum Holdings, Inc. (a)		1,640		52,890
AMETEK, Inc.		3,032		520,625
Automatic Data Processing, Inc.		5,340		1,477,738
Axon Enterprise, Inc. (a)		935		373,626
Boeing Co. (a)		7,665		1,165,387
Broadridge Financial Solutions, Inc.		1,528		328,566
Builders FirstSource, Inc. (a)		1,525		295,637
C.H. Robinson Worldwide, Inc.		1,543		170,301
Carrier Global Corp.		10,994		884,907
Caterpillar, Inc.		6,350		2,483,612
Cintas Corp.		4,486		923,578
Copart, Inc. (a)		11,467		600,871
CSX Corp.		25,388		876,648
Cummins, Inc.		1,795		581,203
Dayforce, Inc. (a) (b)		2,080		127,400
Deere & Co.		3,356		1,400,559
Delta Air Lines, Inc.		8,397		426,484
Dover Corp.		1,800		345,132
Eaton Corp. PLC		5,213		1,727,797
Emerson Electric Co.		7,499		820,166
Equifax, Inc.		1,620		476,053
Expeditors International of Washington, Inc.		1,848		242,827
Fastenal Co.		7,499		535,579
FedEx Corp.		2,951		807,630
Fortive Corp.		4,588		362,131
GE Vernova, Inc. (a)		3,598		917,418
Generac Holdings, Inc. (a)		788		125,197
General Dynamics Corp.		3,377		1,020,529
General Electric Co.		14,199		2,677,647
Honeywell International, Inc.		8,527		1,762,616
Howmet Aerospace, Inc.		5,345		535,836
Hubbell, Inc.		703		301,130
Huntington Ingalls Industries, Inc.		514		135,891
IDEX Corp.		997		213,857
Illinois Tool Works, Inc.		3,538		927,204
Ingersoll Rand, Inc.		5,284		518,677
Jacobs Solutions, Inc.		1,640		214,676
JB Hunt Transport Services, Inc.		1,055		181,808
Johnson Controls International PLC		8,748		678,932
L3Harris Technologies, Inc.		2,484		590,869
Leidos Holdings, Inc.		1,764		287,532
Lockheed Martin Corp.		2,778		1,623,908
Masco Corp.		2,858		239,901
Nordson Corp.		716		188,043
Norfolk Southern Corp.		2,961		735,809
Northrop Grumman Corp.		1,800		950,526
Old Dominion Freight Line, Inc.		2,469		490,442

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Otis Worldwide Corp.		5,245	$	545,165
PACCAR, Inc.		6,865		677,438
Parker-Hannifin Corp.		1,683		1,063,353
Paychex, Inc.		4,197		563,195
Paycom Software, Inc.		633		105,439
Pentair PLC		2,167		211,911
Quanta Services, Inc.		1,928		574,833
Republic Services, Inc.		2,673		536,845
Rockwell Automation, Inc.		1,486		398,932
Rollins, Inc.		3,700		187,146
RTX Corp.		17,419		2,110,486
Snap-on, Inc.		690		199,900
Southwest Airlines Co. (b)		7,884		233,603
Stanley Black & Decker, Inc.		2,027		223,234
Textron, Inc.		2,453		217,287
Trane Technologies PLC		2,955		1,148,697
TransDigm Group, Inc.		735		1,048,941
Uber Technologies, Inc. (a)		27,527		2,068,929
Union Pacific Corp.		7,977		1,966,171
United Airlines Holdings, Inc. (a)		4,306		245,700
United Parcel Service, Inc. Class B		9,592		1,307,773
United Rentals, Inc.		872		706,085
Veralto Corp.		3,236		361,979
Verisk Analytics, Inc.		1,865		499,745
W.W. Grainger, Inc.		582		604,587
Waste Management, Inc.		4,782		992,743
Westinghouse Air Brake Technologies Corp.		2,294		416,980
Xylem, Inc.		3,181		429,530
				54,263,254
Information Technology — 31.5%
Accenture PLC Class A		8,202		2,899,243
Adobe, Inc. (a)		5,806		3,006,231
Advanced Micro Devices, Inc. (a)		21,194		3,477,511
Akamai Technologies, Inc. (a)		1,984		200,285
Amphenol Corp. Class A		15,770		1,027,573
Analog Devices, Inc.		6,498		1,495,645
ANSYS, Inc. (a)		1,144		364,513
Apple, Inc.		199,096		46,389,368
Applied Materials, Inc.		10,842		2,190,626
Arista Networks, Inc. (a)		3,373		1,294,625
Autodesk, Inc. (a)		2,818		776,303
Broadcom, Inc.		60,955		10,514,737
Cadence Design Systems, Inc. (a)		3,585		971,643
CDW Corp.		1,749		395,799
Cisco Systems, Inc.		52,757		2,807,728
Cognizant Technology Solutions Corp. Class A		6,491		500,975
Corning, Inc.		10,085		455,338
Crowdstrike Holdings, Inc. Class A (a)		3,023		847,861
Dell Technologies, Inc. Class C		3,767		446,540
Enphase Energy, Inc. (a)		1,773		200,384
EPAM Systems, Inc. (a)		746		148,476
F5, Inc. (a)		763		168,013
Fair Isaac Corp. (a)		321		623,870
First Solar, Inc. (a)		1,402		349,715
Fortinet, Inc. (a)		8,314		644,751
Gartner, Inc. (a)		1,009		511,321
Gen Digital, Inc.		7,093		194,561

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
GoDaddy, Inc. Class A (a)		1,846	$	289,416
Hewlett Packard Enterprise Co.		17,019		348,209
HP, Inc.		12,814		459,638
Intel Corp.		55,876		1,310,851
International Business Machines Corp.		12,062		2,666,667
Intuit, Inc.		3,661		2,273,481
Jabil, Inc.		1,486		178,067
Juniper Networks, Inc.		4,281		166,873
Keysight Technologies, Inc. (a)		2,286		363,314
KLA Corp.		1,760		1,362,962
Lam Research Corp.		1,707		1,393,049
Microchip Technology, Inc.		7,025		564,037
Micron Technology, Inc.		14,520		1,505,869
Microsoft Corp.		97,335		41,883,250
Monolithic Power Systems, Inc.		638		589,831
Motorola Solutions, Inc.		2,185		982,442
NetApp, Inc.		2,692		332,489
NVIDIA Corp.		322,134		39,119,953
NXP Semiconductors NV		3,336		800,673
ON Semiconductor Corp. (a)		5,609		407,269
Oracle Corp.		20,931		3,566,642
Palantir Technologies, Inc. Class A (a)		26,370		980,964
Palo Alto Networks, Inc. (a)		4,240		1,449,232
PTC, Inc. (a)		1,577		284,901
Qorvo, Inc. (a)		1,242		128,299
QUALCOMM, Inc.		14,588		2,480,689
Roper Technologies, Inc.		1,404		781,242
Salesforce, Inc.		12,689		3,473,106
Seagate Technology Holdings PLC		2,750		301,207
ServiceNow, Inc. (a)		2,698		2,413,064
Skyworks Solutions, Inc.		2,091		206,528
Super Micro Computer, Inc. (a) (b)		659		274,408
Synopsys, Inc. (a)		2,006		1,015,818
TE Connectivity PLC (a)		3,980		600,940
Teledyne Technologies, Inc. (a)		613		268,286
Teradyne, Inc.		2,137		286,208
Texas Instruments, Inc.		11,956		2,469,751
Trimble, Inc. (a)		3,217		199,744
Tyler Technologies, Inc. (a)		559		326,299
VeriSign, Inc. (a)		1,099		208,766
Western Digital Corp. (a)		4,276		292,008
Zebra Technologies Corp. Class A (a)		677		250,707
				202,160,784
Materials — 2.2%
Air Products & Chemicals, Inc.		2,911		866,721
Albemarle Corp. (b)		1,548		146,611
Amcor PLC		19,041		215,735
Avery Dennison Corp.		1,054		232,681
Ball Corp.		3,975		269,942
Celanese Corp.		1,431		194,559
CF Industries Holdings, Inc.		2,362		202,660
Corteva, Inc.		9,065		532,931
Dow, Inc.		9,178		501,394
DuPont de Nemours, Inc.		5,467		487,164
Eastman Chemical Co.		1,531		171,395
Ecolab, Inc.		3,316		846,674
FMC Corp.		1,644		108,405

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Freeport-McMoRan, Inc.		18,815	$	939,245
International Flavors & Fragrances, Inc.		3,348		351,306
International Paper Co.		4,549		222,219
Linde PLC (LIN US)		6,295		3,001,834
LyondellBasell Industries NV Class A		3,389		325,005
Martin Marietta Materials, Inc.		800		430,600
Mosaic Co.		4,173		111,753
Newmont Corp. (NEM US)		15,025		803,086
Nucor Corp.		3,108		467,257
Packaging Corp. of America		1,174		252,880
PPG Industries, Inc.		3,055		404,665
Sherwin-Williams Co.		3,039		1,159,895
Smurfit WestRock PLC		6,461		319,303
Steel Dynamics, Inc.		1,879		236,904
Vulcan Materials Co.		1,729		432,994
				14,235,818
Real Estate — 2.3%
Alexandria Real Estate Equities, Inc.		2,039		242,131
American Tower Corp.		6,116		1,422,337
AvalonBay Communities, Inc.		1,860		418,965
BXP, Inc.		1,904		153,196
Camden Property Trust		1,403		173,313
CBRE Group, Inc. Class A (a)		3,944		490,949
CoStar Group, Inc. (a)		5,379		405,792
Crown Castle, Inc.		5,691		675,123
Digital Realty Trust, Inc.		4,030		652,175
Equinix, Inc.		1,243		1,103,324
Equity Residential		4,468		332,687
Essex Property Trust, Inc.		841		248,448
Extra Space Storage, Inc.		2,775		500,027
Federal Realty Investment Trust		984		113,131
Healthpeak Properties, Inc.		9,271		212,028
Host Hotels & Resorts, Inc.		9,198		161,885
Invitation Homes, Inc.		7,460		263,040
Iron Mountain, Inc.		3,841		456,426
Kimco Realty Corp.		8,792		204,150
Mid-America Apartment Communities, Inc.		1,530		243,117
Prologis, Inc.		12,125		1,531,145
Public Storage		2,063		750,664
Realty Income Corp.		11,404		723,242
Regency Centers Corp.		2,139		154,500
SBA Communications Corp.		1,407		338,665
Simon Property Group, Inc.		4,013		678,277
UDR, Inc.		3,930		178,186
Ventas, Inc.		5,410		346,943
VICI Properties, Inc.		13,743		457,779
Welltower, Inc.		7,578		970,211
Weyerhaeuser Co.		9,524		322,483
				14,924,339
Utilities — 2.5%
AES Corp.		9,362		187,802
Alliant Energy Corp.		3,377		204,950
Ameren Corp.		3,494		305,585
American Electric Power Co., Inc.		6,944		712,454
American Water Works Co., Inc.		2,552		373,205

MML Equity Index Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Atmos Energy Corp.		2,033	$	281,997
CenterPoint Energy, Inc.		8,428		247,952
CMS Energy Corp.		3,912		276,305
Consolidated Edison, Inc.		4,529		471,605
Constellation Energy Corp.		4,095		1,064,782
Dominion Energy, Inc.		10,986		634,881
DTE Energy Co.		2,711		348,120
Duke Energy Corp.		10,109		1,165,568
Edison International		5,069		441,459
Entergy Corp.		2,800		368,508
Evergy, Inc.		3,029		187,828
Eversource Energy		4,641		315,820
Exelon Corp.		13,095		531,002
FirstEnergy Corp.		6,712		297,677
NextEra Energy, Inc.		26,904		2,274,195
NiSource, Inc.		5,906		204,643
NRG Energy, Inc.		2,703		246,243
PG&E Corp.		27,990		553,362
Pinnacle West Capital Corp.		1,496		132,531
PPL Corp.		9,661		319,586
Public Service Enterprise Group, Inc.		6,523		581,917
Sempra		8,291		693,376
Southern Co.		14,318		1,291,197
Vistra Corp.		4,499		533,312
WEC Energy Group, Inc.		4,139		398,089
Xcel Energy, Inc.		7,300		476,690
				16,122,641

TOTAL COMMON STOCK (Cost $282,146,896)				637,647,869

TOTAL EQUITIES (Cost $282,146,896)				637,647,869

TOTAL LONG-TERM INVESTMENTS (Cost $282,146,896)				637,647,869

	Principal Amount
SHORT-TERM INVESTMENTS — 0.6%

Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (c)	$	3,416,924		3,416,924
U.S. Treasury Bills — 0.0%
U.S. Treasury Bills
5.261% 10/03/24 (d) (e)		180,000		179,954
5.279% 10/03/24 (d) (e)		5,000		4,999
5.316% 10/03/24 (d) (e)		5,000		4,999
5.353% 10/03/24 (d) (e)		10,000		9,997
5.359% 10/03/24 (d) (e)		10,000		9,997
				209,946

TOTAL SHORT-TERM INVESTMENTS (Cost $3,626,864)				3,626,870

MML Equity Index Fund — Portfolio of Investments (Continued)

	Principal Amount	Value
TOTAL INVESTMENTS — 100.0% (Cost $285,773,760) (f)		$	641,274,739

Other Assets/(Liabilities) — 0.0%			105,294

NET ASSETS — 100.0%		$	641,380,033

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 September 30, 2024, was $813,423 or 0.13% of net assets. The Fund received $835,830 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 $3,417,069. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $3,485,465.

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

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

(f)	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

S&P 500 E Mini Index

12/20/24

3,701,616

77,647

MML Focused Equity Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.7%

COMMON STOCK — 98.7%
Consumer Discretionary — 14.4%
McDonald's Corp.		49,120	$	14,957,531
NIKE, Inc. Class B		144,306		12,756,651
TJX Cos., Inc.		111,232		13,074,209
				40,788,391
Consumer Staples — 11.1%
Coca-Cola Co.		122,466		8,800,407
PepsiCo, Inc.		66,880		11,372,944
Procter & Gamble Co.		65,835		11,402,622
				31,575,973
Financials — 21.1%
American Express Co.		33,155		8,991,636
Chubb Ltd.		34,644		9,990,983
Marsh & McLennan Cos., Inc.		53,472		11,929,069
Mastercard, Inc. Class A		11,311		5,585,372
S&P Global, Inc.		22,154		11,445,199
Visa, Inc. Class A		44,037		12,107,973
				60,050,232
Health Care — 13.1%
Danaher Corp.		43,369		12,057,449
Stryker Corp.		29,810		10,769,161
UnitedHealth Group, Inc.		24,573		14,367,342
				37,193,952
Industrials — 13.0%
General Dynamics Corp.		23,248		7,025,546
Honeywell International, Inc.		50,174		10,371,467
Lockheed Martin Corp.		12,332		7,208,794
Northrop Grumman Corp.		13,539		7,149,540
Union Pacific Corp.		20,936		5,160,305
				36,915,652
Information Technology — 19.5%
Accenture PLC Class A		38,459		13,594,487
Apple, Inc.		56,263		13,109,279
Intuit, Inc.		6,904		4,287,384
Microsoft Corp.		28,425		12,231,278
Texas Instruments, Inc.		58,913		12,169,658
				55,392,086

MML Focused Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Materials — 4.5%
Linde PLC (LIN US)		26,872	$	12,814,182
Real Estate — 2.0%
American Tower Corp.		24,674		5,738,185

TOTAL COMMON STOCK (Cost $219,211,209)				280,468,653

TOTAL EQUITIES (Cost $219,211,209)				280,468,653

TOTAL LONG-TERM INVESTMENTS (Cost $219,211,209)				280,468,653

	Principal Amount
SHORT-TERM INVESTMENTS — 0.9%

Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (a)	$	2,487,499		2,487,499

TOTAL SHORT-TERM INVESTMENTS (Cost $2,487,499)				2,487,499

TOTAL INVESTMENTS — 99.6% (Cost $221,698,708) (b)				282,956,152

Other Assets/(Liabilities) — 0.4%				1,211,778

NET ASSETS — 100.0%			$	284,167,930

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Maturity value of $2,487,604. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $2,537,436.

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

MML Foreign Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 94.4%

COMMON STOCK — 93.9%
Australia — 4.5%
BHP Group Ltd. (a)		10,500	$	326,476
Glencore PLC		316,800		1,814,163
Macquarie Group Ltd.		11,000		1,773,955
Santos Ltd.		366,800		1,787,745
Sonic Healthcare Ltd.		68,600		1,290,878
Whitehaven Coal Ltd.		181,800		910,709
				7,903,926
Belgium — 3.3%
Anheuser-Busch InBev SA		42,100		2,789,394
Groupe Bruxelles Lambert NV		8,000		623,152
KBC Group NV		20,600		1,639,025
Liberty Global Ltd. Class C (a) (b)		32,100		693,681
				5,745,252
Brazil — 0.2%
Pluxee NV (b)		20,200		426,071
Canada — 0.6%
CCL Industries, Inc. Class B (a)		16,100		981,511
China — 0.9%
Prosus NV (PRX NA)		35,200		1,522,368
Denmark — 0.4%
Novo Nordisk AS Class B		5,200		619,181
France — 8.8%
Accor SA		48,800		2,121,124
Amundi SA (c)		13,100		979,442
Capgemini SE		9,700		2,101,188
Cie de Saint-Gobain SA		15,700		1,431,053
Rexel SA		14,300		414,258
Societe Generale SA		67,300		1,677,750
Sodexo SA		14,400		1,180,636
Teleperformance SE		5,500		570,478
TotalEnergies SE (a)		35,700		2,313,905
Veolia Environnement SA		82,712		2,721,309
				15,511,143
Germany — 10.2%
Allianz SE Registered		5,400		1,771,892
BASF SE		19,200		1,016,100
Deutsche Boerse AG		7,400		1,735,316
Deutsche Post AG		39,000		1,736,705

MML Foreign Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Heidelberg Materials AG		19,400	$	2,108,746
Infineon Technologies AG		52,000		1,819,956
K&S AG Registered		28,400		364,303
SAP SE		15,100		3,430,134
Siemens AG Registered		12,700		2,564,772
Zalando SE (b) (c)		42,100		1,389,102
				17,937,026
Hong Kong — 1.3%
AIA Group Ltd.		124,000		1,096,507
CK Asset Holdings Ltd.		262,700		1,141,551
				2,238,058
Ireland — 2.0%
AerCap Holdings NV		22,500		2,131,200
AIB Group PLC		247,800		1,420,490
				3,551,690
Israel — 0.9%
Check Point Software Technologies Ltd. (b)		8,600		1,658,166
Italy — 0.3%
Prysmian SpA		7,000		508,920
Japan — 19.5%
Astellas Pharma, Inc. (a)		118,200		1,356,748
Canon, Inc. (a)		38,300		1,257,889
FANUC Corp. (a)		54,200		1,584,085
Fujitsu Ltd.		144,400		2,962,349
Hitachi Ltd.		134,800		3,561,241
Kyocera Corp.		123,600		1,434,098
Nintendo Co. Ltd.		21,400		1,140,968
Olympus Corp.		110,500		2,097,244
ORIX Corp.		118,200		2,744,213
Rakuten Group, Inc. (a) (b)		209,700		1,357,790
Renesas Electronics Corp.		96,000		1,400,848
SBI Holdings, Inc. (a)		84,400		1,944,919
Seven & i Holdings Co. Ltd.		175,100		2,622,154
Sony Group Corp.		188,000		3,651,230
Square Enix Holdings Co. Ltd.		14,900		591,430
Sumitomo Mitsui Financial Group, Inc.		124,500		2,650,594
Toyota Industries Corp.		25,700		1,983,916
				34,341,716
Luxembourg — 1.5%
ArcelorMittal SA		52,800		1,385,686
Eurofins Scientific SE		20,000		1,267,596
				2,653,282
Netherlands — 3.2%
ASML Holding NV		2,200		1,834,028
EXOR NV		4,400		471,578
Heineken Holding NV		19,000		1,434,959
ING Groep NV Series N		75,100		1,365,942

MML Foreign Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Koninklijke Philips NV (b)		16,820	$	551,165
				5,657,672
Norway — 0.9%
Aker BP ASA		59,973		1,289,937
DNB Bank ASA		15,000		307,697
				1,597,634
Republic of Korea — 1.3%
Samsung Electronics Co. Ltd.		49,900		2,365,028
Singapore — 1.4%
DBS Group Holdings Ltd.		83,060		2,466,844
Sweden — 2.9%
Boliden AB		24,000		814,218
Essity AB Class B		65,600		2,047,288
Husqvarna AB Class B		39,200		274,915
Skandinaviska Enskilda Banken AB Class A		99,200		1,517,706
Volvo AB Class B		18,798		496,956
				5,151,083
Switzerland — 2.6%
Cie Financiere Richemont SA Registered Class A		11,600		1,839,091
Julius Baer Group Ltd.		19,581		1,179,804
Novartis AG Registered		13,400		1,542,551
				4,561,446
United Kingdom — 15.1%
Ashtead Group PLC		22,400		1,738,715
Aviva PLC		159,176		1,031,624
Barratt Developments PLC		115,400		740,055
Bunzl PLC		14,600		690,729
Burberry Group PLC		28,200		264,898
CK Hutchison Holdings Ltd.		428,000		2,429,849
DCC PLC		26,000		1,772,167
Dowlais Group PLC		325,896		254,711
Entain PLC		73,600		751,568
Inchcape PLC		115,500		1,232,341
Informa PLC		70,100		770,054
Kingfisher PLC		136,400		588,559
Legal & General Group PLC		549,800		1,662,971
Lloyds Banking Group PLC		3,049,500		2,394,546
Pearson PLC		70,500		955,998
Persimmon PLC		42,200		926,634
Reckitt Benckiser Group PLC		34,000		2,082,085
Smith & Nephew PLC		141,000		2,192,096
Tesco PLC		353,405		1,694,330
Unilever PLC (ULVR LN)		36,900		2,389,717
				26,563,647
United States — 12.1%
BP PLC		411,800		2,172,152
CNH Industrial NV		128,500		1,426,350
GSK PLC		95,500		1,942,460

MML Foreign Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Linde PLC (LIN US)		2,800	$	1,335,208
Nestle SA Registered		30,500		3,073,882
Roche Holding AG		11,700		3,745,342
Sanofi SA		20,600		2,373,412
Shell PLC		61,000		1,988,167
Smurfit WestRock PLC		41,100		2,031,162
Stellantis NV		27,900		386,119
Tenaris SA		51,700		820,628
				21,294,882

TOTAL COMMON STOCK (Cost $143,670,542)				165,256,546

PREFERRED STOCK — 0.5%
Germany — 0.5%
Henkel AG & Co. KGaA 2.197%
		10,000		939,625

TOTAL PREFERRED STOCK (Cost $788,059)				939,625

TOTAL EQUITIES (Cost $144,458,601)				166,196,171

TOTAL LONG-TERM INVESTMENTS (Cost $144,458,601)				166,196,171


SHORT-TERM INVESTMENTS — 8.7%
Investment of Cash Collateral from Securities Loaned — 3.1%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		5,415,947		5,415,947

	Principal Amount
Repurchase Agreement — 5.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (e)	$	9,884,221		9,884,221

TOTAL SHORT-TERM INVESTMENTS (Cost $15,300,168)				15,300,168

TOTAL INVESTMENTS — 103.1% (Cost $159,758,769) (f)				181,496,339

Other Assets/(Liabilities) — (3.1)%				(5,478,573)

NET ASSETS — 100.0%			$	176,017,766

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 September 30, 2024, was $9,754,838 or 5.54% of net assets. The Fund received $4,860,778 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)	Non-income producing security.

(c)

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

(e)	Maturity value of $9,884,638. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $10,082,067.

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

MML Fundamental Equity Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.7%

COMMON STOCK — 99.7%
Communication Services — 8.6%
Alphabet, Inc. Class A		27,040	$	4,484,584
Comcast Corp. Class A		32,637		1,363,248
Meta Platforms, Inc. Class A		8,182		4,683,704
T-Mobile US, Inc.		5,270		1,087,517
Verizon Communications, Inc.		24,799		1,113,723
				12,732,776
Consumer Discretionary — 7.6%
Amazon.com, Inc. (a)		36,552		6,810,734
Aptiv PLC (a)		15,846		1,141,071
Royal Caribbean Cruises Ltd.		6,679		1,184,587
Tesla, Inc. (a)		2,880		753,494
Valvoline, Inc. (a)		32,127		1,344,515
				11,234,401
Consumer Staples — 6.6%
Constellation Brands, Inc. Class A		11,115		2,864,224
Coty, Inc. Class A (a)		56,608		531,549
Philip Morris International, Inc.		30,707		3,727,830
Walmart, Inc.		33,184		2,679,608
				9,803,211
Energy — 4.1%
Exxon Mobil Corp.		38,602		4,524,927
Suncor Energy, Inc. (SU US)		39,824		1,470,302
				5,995,229
Financials — 13.6%
American Express Co.		11,189		3,034,457
American International Group, Inc.		21,004		1,538,123
ARES Management Corp. Class A		4,951		771,564
Arthur J Gallagher & Co.		3,724		1,047,822
Charles Schwab Corp.		26,789		1,736,195
Equitable Holdings, Inc.		46,526		1,955,488
Fiserv, Inc. (a)		15,237		2,737,327
JP Morgan Chase & Co.		18,170		3,831,326
Mastercard, Inc. Class A		4,335		2,140,623
Wells Fargo & Co.		23,873		1,348,585
				20,141,510
Health Care — 15.5%
AbbVie, Inc.		5,642		1,114,182
Becton Dickinson & Co.		6,696		1,614,406

MML Fundamental Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Boston Scientific Corp. (a)		19,222	$	1,610,804
The Cooper Cos., Inc. (a)		13,353		1,473,370
Danaher Corp.		4,045		1,124,591
Eli Lilly & Co.		3,072		2,721,608
Gilead Sciences, Inc.		10,552		884,680
HCA Healthcare, Inc.		4,394		1,785,853
Lonza Group AG Registered		2,733		1,728,947
Merck & Co., Inc.		17,029		1,933,813
Tenet Healthcare Corp. (a)		8,574		1,424,999
UnitedHealth Group, Inc.		6,233		3,644,310
Zimmer Biomet Holdings, Inc.		18,042		1,947,634
				23,009,197
Industrials — 9.1%
AerCap Holdings NV		7,759		734,932
Emerson Electric Co.		14,691		1,606,755
Equifax, Inc.		6,833		2,007,945
Hubbell, Inc.		4,436		1,900,160
Huntington Ingalls Industries, Inc.		3,602		952,297
Otis Worldwide Corp.		9,316		968,305
Paylocity Holding Corp. (a)		2,245		370,358
Rockwell Automation, Inc.		3,856		1,035,182
Uber Technologies, Inc. (a)		30,998		2,329,810
United Parcel Service, Inc. Class B		11,404		1,554,821
				13,460,565
Information Technology — 28.2%
Amdocs Ltd.		10,214		893,521
Apple, Inc.		36,318		8,462,094
Applied Materials, Inc.		10,148		2,050,403
Broadcom, Inc.		13,211		2,278,897
Microsoft Corp.		24,732		10,642,180
MongoDB, Inc. (a)		2,581		697,773
NVIDIA Corp.		81,295		9,872,465
Salesforce, Inc.		3,641		996,578
ServiceNow, Inc. (a)		2,751		2,460,467
Texas Instruments, Inc.		8,143		1,682,100
Tyler Technologies, Inc. (a)		2,804		1,636,751
				41,673,229
Materials — 2.3%
CRH PLC		19,320		1,791,737
DuPont de Nemours, Inc.		18,857		1,680,347
				3,472,084
Real Estate — 1.7%
Prologis, Inc.		20,351		2,569,924
Utilities — 2.4%
Ameren Corp.		6,489		567,528
Atmos Energy Corp.		9,962		1,381,829
Constellation Energy Corp.		3,229		839,605

MML Fundamental Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
FirstEnergy Corp.		17,897	$	793,732
				3,582,694

TOTAL COMMON STOCK (Cost $109,456,122)				147,674,820

TOTAL EQUITIES (Cost $109,456,122)				147,674,820

TOTAL LONG-TERM INVESTMENTS (Cost $109,456,122)				147,674,820

	Principal Amount
SHORT-TERM INVESTMENTS — 0.8%

Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (b)	$	1,164,323		1,164,323

TOTAL SHORT-TERM INVESTMENTS (Cost $1,164,323)				1,164,323

TOTAL INVESTMENTS — 100.5% (Cost $110,620,445) (c)				148,839,143

Other Assets/(Liabilities) — (0.5)%				(799,185)

NET ASSETS — 100.0%			$	148,039,958

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.

(b)	Maturity value of $1,164,372. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $1,187,792.

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

MML Fundamental Value Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.9%

COMMON STOCK — 98.9%
Communication Services — 4.8%
Alphabet, Inc. Class A		26,718	$	4,431,180
Omnicom Group, Inc.		19,728		2,039,678
T-Mobile US, Inc.		9,696		2,000,867
				8,471,725
Consumer Discretionary — 7.0%
AutoNation, Inc. (a)		8,564		1,532,271
AutoZone, Inc. (a)		887		2,794,085
Booking Holdings, Inc.		247		1,040,394
Home Depot, Inc.		5,621		2,277,629
Lennar Corp. Class A		11,639		2,182,080
MGM Resorts International (a)		31,136		1,217,106
Starbucks Corp.		15,188		1,480,678
				12,524,243
Consumer Staples — 9.2%
Coca-Cola Europacific Partners PLC		14,134		1,113,053
J.M. Smucker Co.		11,611		1,406,092
Kenvue, Inc.		73,424		1,698,297
Philip Morris International, Inc.		30,635		3,719,089
Sysco Corp.		27,295		2,130,648
Target Corp.		7,401		1,153,520
US Foods Holding Corp (a)		41,295		2,539,642
Walmart, Inc.		31,004		2,503,573
				16,263,914
Energy — 7.8%
Canadian Natural Resources Ltd.		47,149		1,565,818
Cenovus Energy, Inc.		112,060		1,874,764
ConocoPhillips		19,021		2,002,531
Diamondback Energy, Inc.		15,948		2,749,435
Marathon Petroleum Corp.		13,493		2,198,145
Phillips 66		8,740		1,148,873
Schlumberger NV		56,205		2,357,800
				13,897,366
Financials — 21.6%
American Express Co.		11,341		3,075,679
Aon PLC Class A		6,116		2,116,075
Arthur J Gallagher & Co.		4,682		1,317,374
Blue Owl Capital, Inc.		91,847		1,778,158
Chubb Ltd.		6,346		1,830,123
Corpay, Inc. (a)		6,599		2,063,903
Discover Financial Services		17,366		2,436,276

MML Fundamental Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Fidelity National Information Services, Inc.		37,571	$	3,146,571
Goldman Sachs Group, Inc.		3,267		1,617,524
Huntington Bancshares, Inc.		170,008		2,499,118
Intercontinental Exchange, Inc.		7,979		1,281,747
JP Morgan Chase & Co.		37,326		7,870,560
LPL Financial Holdings, Inc.		6,833		1,589,561
Morgan Stanley		33,078		3,448,051
Wells Fargo & Co.		40,703		2,299,313
				38,370,033
Health Care — 13.6%
Abbott Laboratories		20,126		2,294,565
AbbVie, Inc.		13,118		2,590,543
Amgen, Inc.		7,767		2,502,605
Avantor, Inc. (a)		37,720		975,817
Cencora, Inc.		13,344		3,003,468
Centene Corp. (a)		26,619		2,003,878
Cigna Group		6,571		2,276,457
Hologic, Inc. (a)		10,642		866,897
ICON PLC (a)		6,071		1,744,259
McKesson Corp.		4,058		2,006,356
UnitedHealth Group, Inc.		6,637		3,880,521
				24,145,366
Industrials — 15.6%
Allegion PLC		6,729		980,685
Amentum Holdings, Inc. (a)		14,239		459,208
Builders FirstSource, Inc. (a)		10,860		2,105,320
Deere & Co.		3,210		1,339,629
Emerson Electric Co.		7,409		810,322
Fortive Corp.		24,251		1,914,131
General Dynamics Corp.		8,224		2,485,293
Honeywell International, Inc.		13,231		2,734,980
Jacobs Solutions, Inc.		14,239		1,863,885
Leidos Holdings, Inc.		13,565		2,211,095
Masco Corp.		16,049		1,347,153
Norfolk Southern Corp.		8,540		2,122,190
Robert Half, Inc.		13,733		925,742
United Rentals, Inc.		3,048		2,468,057
WESCO International, Inc.		4,430		744,151
Westinghouse Air Brake Technologies Corp.		10,642		1,934,396
WillScot Holdings Corp. (a)		33,807		1,271,143
				27,717,380
Information Technology — 13.8%
Advanced Micro Devices, Inc. (a)		13,510		2,216,721
Applied Materials, Inc.		11,265		2,276,093
Dell Technologies, Inc. Class C		14,272		1,691,803
Flex Ltd. (a)		63,020		2,106,759
Hewlett Packard Enterprise Co.		48,802		998,489
Keysight Technologies, Inc. (a)		9,541		1,516,351
Microchip Technology, Inc.		28,583		2,294,929
Micron Technology, Inc.		25,641		2,659,228
Nice Ltd. Sponsored ADR (a) (b)		6,137		1,065,813
NXP Semiconductors NV		4,430		1,063,244
Oracle Corp.		31,127		5,304,041

MML Fundamental Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
QUALCOMM, Inc.		5,830	$	991,391
Trimble, Inc. (a)		5,687		353,106
				24,537,968
Materials — 3.8%
CRH PLC		33,698		3,125,153
Kinross Gold Corp.		151,276		1,415,943
Teck Resources Ltd. Class B		41,831		2,185,251
				6,726,347
Utilities — 1.7%
CenterPoint Energy, Inc.		53,723		1,580,531
FirstEnergy Corp.		31,029		1,376,136
				2,956,667

TOTAL COMMON STOCK (Cost $135,623,000)				175,611,009

TOTAL EQUITIES (Cost $135,623,000)				175,611,009

TOTAL LONG-TERM INVESTMENTS (Cost $135,623,000)				175,611,009


SHORT-TERM INVESTMENTS — 2.0%
Investment of Cash Collateral from Securities Loaned — 0.6%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		1,076,794		1,076,794

	Principal Amount
Repurchase Agreement — 1.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (d)	$	2,366,972		2,366,972

TOTAL SHORT-TERM INVESTMENTS (Cost $3,443,766)				3,443,766

TOTAL INVESTMENTS — 100.9% (Cost $139,066,766) (e)				179,054,775

Other Assets/(Liabilities) — (0.9)%				(1,522,563)

NET ASSETS — 100.0%			$	177,532,212

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 September 30, 2024, was $1,055,045 or 0.59% of net assets. (Note 2).

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

(d)	Maturity value of $2,367,072. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $2,414,398.

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

MML Global Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.8%

COMMON STOCK — 98.8%
Austria — 0.6%
Erste Group Bank AG		15,270	$	837,804
Canada — 3.2%
Canadian National Railway Co.		15,477		1,813,131
Canadian Pacific Kansas City Ltd. (a)		27,902		2,386,737
				4,199,868
Denmark — 0.8%
Carlsberg AS Class B		8,713		1,038,088
France — 8.7%
Air Liquide SA		6,900		1,332,633
Capgemini SE		11,086		2,401,419
EssilorLuxottica SA		2,563		607,329
Hermes International SCA		250		615,129
Legrand SA		15,222		1,755,348
LVMH Moet Hennessy Louis Vuitton SE		3,410		2,618,929
Pernod Ricard SA		14,583		2,204,218
				11,535,005
Germany — 3.2%
Brenntag SE		6,835		509,578
Deutsche Boerse AG		3,619		848,663
Merck KGaA		12,036		2,119,208
MTU Aero Engines AG		2,581		804,453
				4,281,902
Ireland — 1.3%
Accenture PLC Class A		4,791		1,693,523
Israel — 1.4%
Check Point Software Technologies Ltd. (b)		9,702		1,870,643
Japan — 2.6%
Hoya Corp.		4,600		636,967
Kubota Corp.		76,500		1,085,948
Olympus Corp.		89,000		1,689,183
				3,412,098
Mexico — 0.2%
Grupo Financiero Banorte SAB de CV Class O		41,312		294,031
Netherlands — 2.1%
Akzo Nobel NV		12,261		864,812

MML Global Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Heineken NV (a)		21,907	$	1,942,426
				2,807,238
Republic of Korea — 0.9%
Samsung Electronics Co. Ltd.		23,743		1,125,308
Spain — 3.4%
Aena SME SA (c)		5,523		1,215,350
Amadeus IT Group SA		24,436		1,763,743
Cellnex Telecom SA (c)		39,074		1,583,158
				4,562,251
Sweden — 0.4%
Essity AB Class B		18,009		562,036
Switzerland — 3.9%
Cie Financiere Richemont SA Registered Class A		15,359		2,435,051
Julius Baer Group Ltd.		7,864		473,825
UBS Group AG Registered		75,721		2,337,880
				5,246,756
United Kingdom — 7.7%
Burberry Group PLC		44,612		419,065
Compass Group PLC		25,678		822,731
Diageo PLC		66,952		2,336,091
Intertek Group PLC		13,366		923,942
London Stock Exchange Group PLC		8,606		1,176,707
Melrose Industries PLC		158,210		967,692
Reckitt Benckiser Group PLC		19,780		1,211,284
Rolls-Royce Holdings PLC (b)		173,519		1,225,444
Whitbread PLC		12,855		539,574
WPP PLC		68,191		696,889
				10,319,419
United States — 58.4%
Abbott Laboratories		11,288		1,286,945
Air Products & Chemicals, Inc.		7,328		2,181,839
Alphabet, Inc. Class A		16,508		2,737,852
American Express Co.		7,669		2,079,833
Amphenol Corp. Class A		12,768		831,963
Aon PLC Class A		5,254		1,817,831
Aptiv PLC (b)		10,868		782,605
Becton Dickinson & Co.		9,600		2,314,560
Boston Scientific Corp. (b)		15,661		1,312,392
Carrier Global Corp.		6,699		539,203
Charles Schwab Corp.		45,969		2,979,251
Cognizant Technology Solutions Corp. Class A		9,187		709,053
Comcast Corp. Class A		63,211		2,640,323
The Cooper Cos., Inc. (b)		11,417		1,259,752
eBay, Inc.		14,021		912,907
Equifax, Inc.		2,606		765,799
Experian PLC		28,948		1,525,039
Fidelity National Information Services, Inc.		15,525		1,300,219
Fiserv, Inc. (b)		8,520		1,530,618
Goldman Sachs Group, Inc.		4,049		2,004,700
Honeywell International, Inc.		12,477		2,579,121

MML Global Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
International Flavors & Fragrances, Inc.		18,004	$	1,889,160
Linde PLC (LIN US)		5,433		2,590,780
Marriott International, Inc. Class A		3,828		951,641
Medtronic PLC		35,244		3,173,017
Microchip Technology, Inc.		8,003		642,561
Microsoft Corp.		6,039		2,598,582
Nestle SA Registered		21,368		2,153,532
Omnicom Group, Inc. (a)		3,776		390,401
Oracle Corp.		15,281		2,603,882
Otis Worldwide Corp.		7,754		805,951
PPG Industries, Inc.		8,174		1,082,728
Roche Holding AG		8,493		2,718,734
Salesforce, Inc.		4,021		1,100,588
Schneider Electric SE		13,072		3,458,355
STERIS PLC		4,512		1,094,340
Thermo Fisher Scientific, Inc.		5,078		3,141,098
TransUnion		14,850		1,554,795
Union Pacific Corp.		6,316		1,556,768
United Parcel Service, Inc. Class B		6,224		848,580
Visa, Inc. Class A		13,260		3,645,837
Walt Disney Co.		13,442		1,292,986
Waters Corp. (b)		4,451		1,601,870
Willis Towers Watson PLC		9,733		2,866,660
				77,854,651

TOTAL COMMON STOCK (Cost $101,123,277)				131,640,621

TOTAL EQUITIES (Cost $101,123,277)				131,640,621

TOTAL LONG-TERM INVESTMENTS (Cost $101,123,277)				131,640,621


SHORT-TERM INVESTMENTS — 2.4%
Investment of Cash Collateral from Securities Loaned — 1.8%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		2,373,175		2,373,175

	Principal Amount
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (e)	$	818,751		818,751

TOTAL SHORT-TERM INVESTMENTS (Cost $3,191,926)				3,191,926

TOTAL INVESTMENTS — 101.2% (Cost $104,315,203) (f)				134,832,547

Other Assets/(Liabilities) — (1.2)%				(1,541,396)

NET ASSETS — 100.0%			$	133,291,151

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 September 30, 2024, was $4,151,013 or 3.11% of net assets. The Fund received $1,939,336 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)	Non-income producing security.

(c)

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

(e)	Maturity value of $818,785. Collateralized by U.S. Government Agency obligations with a rate of 0.750%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $835,129.

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

MML Income & Growth Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.6%

COMMON STOCK — 98.6%
Communication Services — 4.8%
Alphabet, Inc. Class C		6,371	$	1,065,168
Comcast Corp. Class A		68,991		2,881,754
Electronic Arts, Inc.		7,067		1,013,690
T-Mobile US, Inc.		3,884		801,502
Warner Music Group Corp. Class A		44,832		1,403,242
				7,165,356
Consumer Discretionary — 4.4%
Aptiv PLC (a)		12,837		924,392
Aramark		20,755		803,841
Carnival Corp. (a)		65,800		1,215,984
Las Vegas Sands Corp.		20,535		1,033,732
Lithia Motors, Inc.		2,152		683,561
Six Flags Entertainment Corp.		14,929		601,788
United Parks & Resorts, Inc. (a)		16,304		824,983
Wynn Resorts Ltd.		4,078		390,999
				6,479,280
Consumer Staples — 8.7%
Coca-Cola Europacific Partners PLC		27,433		2,160,349
Keurig Dr. Pepper, Inc.		33,787		1,266,337
Kraft Heinz Co.		43,315		1,520,790
Molson Coors Beverage Co. Class B		22,121		1,272,400
Philip Morris International, Inc.		33,301		4,042,741
Procter & Gamble Co.		8,413		1,457,131
Tyson Foods, Inc. Class A		18,018		1,073,152
				12,792,900
Energy — 8.7%
Enbridge, Inc.		85,528		3,473,292
Exxon Mobil Corp.		8,468		992,619
Halliburton Co.		24,439		709,953
Hess Corp.		21,028		2,855,602
Phillips 66		18,182		2,390,024
Plains GP Holdings LP Class A		131,009		2,423,667
				12,845,157
Financials — 16.8%
Allstate Corp.		11,906		2,257,973
American Express Co.		3,243		879,502
American International Group, Inc.		12,747		933,463
Axis Capital Holdings Ltd.		10,421		829,616
Bank of America Corp.		25,654		1,017,951
The Bank of Nova Scotia (b)		24,869		1,355,112

MML Income & Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Berkshire Hathaway, Inc. Class B (a)		2,256	$	1,038,346
Chubb Ltd.		11,004		3,173,443
Comerica, Inc.		12,564		752,709
Fidelity National Information Services, Inc.		41,061		3,438,859
JP Morgan Chase & Co.		11,160		2,353,198
M&T Bank Corp.		4,695		836,273
Northern Trust Corp.		16,036		1,443,721
Wells Fargo & Co.		46,981		2,653,957
Western Alliance Bancorp		8,807		761,717
Willis Towers Watson PLC		3,971		1,169,579
				24,895,419
Health Care — 14.8%
Avantor, Inc. (a)		41,969		1,085,738
CVS Health Corp.		35,422		2,227,335
Elevance Health, Inc.		1,694		880,880
Humana, Inc.		6,207		1,966,005
Medtronic PLC		34,988		3,149,970
Merck & Co., Inc.		31,243		3,547,955
Sanofi SA ADR		62,159		3,582,223
Smith & Nephew PLC Sponsored ADR (b)		92,230		2,872,042
UnitedHealth Group, Inc.		4,410		2,578,439
				21,890,587
Industrials — 11.2%
AECOM		9,755		1,007,399
AerCap Holdings NV		9,340		884,685
Amentum Holdings, Inc. (a)		7,130		229,943
BWX Technologies, Inc.		12,439		1,352,119
CACI International, Inc. Class A (a)		2,341		1,181,175
General Dynamics Corp.		7,971		2,408,836
Jacobs Solutions, Inc.		7,130		933,317
JB Hunt Transport Services, Inc.		3,935		678,119
Johnson Controls International PLC		33,651		2,611,654
L3Harris Technologies, Inc.		4,946		1,176,505
MDU Resources Group, Inc.		43,940		1,204,395
Stanley Black & Decker, Inc.		5,938		653,952
U-Haul Holding Co. (UHAL/B US)		11,575		833,400
Vertiv Holdings Co. Class A		14,814		1,473,845
				16,629,344
Information Technology — 5.7%
Broadcom, Inc.		6,614		1,140,915
Ciena Corp. (a)		14,274		879,136
Cognizant Technology Solutions Corp. Class A		13,008		1,003,957
Littelfuse, Inc.		2,884		764,981
Microchip Technology, Inc.		10,513		844,089
Oracle Corp.		12,046		2,052,638
QUALCOMM, Inc.		6,081		1,034,074
Skyworks Solutions, Inc.		6,905		682,007
				8,401,797
Materials — 8.7%
Air Products & Chemicals, Inc.		13,394		3,987,930
Axalta Coating Systems Ltd. (a)		33,769		1,222,100
CRH PLC		18,222		1,689,908

MML Income & Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
DuPont de Nemours, Inc.		27,345	$	2,436,713
Element Solutions, Inc.		38,810		1,054,080
International Flavors & Fragrances, Inc.		10,895		1,143,212
Knife River Corp. (a)		14,442		1,290,970
				12,824,913
Real Estate — 7.9%
COPT Defense Properties		26,110		791,916
CubeSmart		14,964		805,512
Mid-America Apartment Communities, Inc.		16,663		2,647,751
Prologis, Inc.		16,678		2,106,098
Public Storage		9,751		3,548,096
SBA Communications Corp.		2,548		613,304
VICI Properties, Inc.		33,470		1,114,886
				11,627,563
Utilities — 6.9%
CenterPoint Energy, Inc.		33,223		977,421
Entergy Corp.		26,737		3,518,856
Pinnacle West Capital Corp.		33,250		2,945,617
Xcel Energy, Inc.		41,332		2,698,980
				10,140,874

TOTAL COMMON STOCK (Cost $112,083,381)				145,693,190

TOTAL EQUITIES (Cost $112,083,381)				145,693,190

TOTAL LONG-TERM INVESTMENTS (Cost $112,083,381)				145,693,190


SHORT-TERM INVESTMENTS — 3.6%
Investment of Cash Collateral from Securities Loaned — 2.0%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		2,921,792		2,921,792

	Principal Amount
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (d)	$	2,385,737		2,385,737

TOTAL SHORT-TERM INVESTMENTS (Cost $5,307,529)				5,307,529

TOTAL INVESTMENTS — 102.2% (Cost $117,390,910) (e)				151,000,719

Other Assets/(Liabilities) — (2.2)%				(3,179,206)

NET ASSETS — 100.0%			$	147,821,513

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 September 30, 2024, was $4,184,813 or 2.83% of net assets. The Fund received $1,369,653 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 $2,385,838. Collateralized by U.S. Government Agency obligations with rates ranging from 0.750% - 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $2,433,727.

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

MML International Equity Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.9%

COMMON STOCK — 97.4%
Australia — 1.4%
Brambles Ltd.		40,700	$	536,471
Glencore PLC		245,144		1,403,824
Rio Tinto PLC		18,649		1,321,670
				3,261,965
Belgium — 1.0%
Anheuser-Busch InBev SA		12,235		810,647
KBC Group NV		13,287		1,057,171
Liberty Global Ltd. Class A (a)		29,100		614,301
				2,482,119
Canada — 3.1%
Canadian National Railway Co.		16,133		1,889,981
Intact Financial Corp.		6,630		1,273,105
Open Text Corp. (b)		40,700		1,354,811
Suncor Energy, Inc. (SU CN)		36,887		1,361,528
Toronto-Dominion Bank		24,530		1,551,115
				7,430,540
China — 2.7%
Alibaba Group Holding Ltd.		115,040		1,529,073
NetEase, Inc.		73,000		1,364,386
Prosus NV (PRX NA)		36,116		1,561,985
Tencent Holdings Ltd.		36,800		2,060,538
				6,515,982
Denmark — 2.9%
Carlsberg AS Class B		17,127		2,040,552
DSV AS		6,080		1,261,708
Novo Nordisk AS Class B		30,150		3,590,059
				6,892,319
France — 15.5%
Accor SA		26,400		1,147,493
Air Liquide SA		24,180		4,670,010
Airbus SE		10,195		1,492,821
BNP Paribas SA		37,076		2,544,315
Capgemini SE		19,531		4,230,752
Cie de Saint-Gobain SA		25,260		2,302,446
Cie Generale des Etablissements Michelin SCA Class A		37,835		1,536,138
Danone SA		8,620		627,679
Dassault Systemes SE		26,978		1,070,612
Edenred SE		79,601		3,019,641

MML International Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Engie SA		127,602	$	2,204,296
EssilorLuxottica SA		10,401		2,464,622
Kering SA		7,745		2,218,318
Legrand SA		13,548		1,562,308
LVMH Moet Hennessy Louis Vuitton SE		4,129		3,171,131
Pernod Ricard SA		15,683		2,370,483
Publicis Groupe SA		3,126		342,084
Worldline SA (a) (b) (c)		66,900		487,612
				37,462,761
Germany — 14.0%
adidas AG		2,870		759,694
Allianz SE Registered		4,290		1,407,670
Bayer AG Registered		83,494		2,819,857
Bayerische Motoren Werke AG		22,455		1,980,428
Beiersdorf AG		19,916		2,997,198
Brenntag SE		14,610		1,089,236
Continental AG		36,335		2,350,651
Daimler Truck Holding AG		37,290		1,394,396
Deutsche Boerse AG		13,939		3,268,725
Fresenius Medical Care AG		47,841		2,034,554
Fresenius SE & Co. KGaA (a)		42,800		1,629,857
Henkel AG & Co. KGaA		6,665		566,888
Mercedes Benz Group AG		28,818		1,862,695
Merck KGaA		14,614		2,573,123
MTU Aero Engines AG		3,312		1,032,293
SAP SE		19,902		4,520,962
Siemens AG Registered		5,435		1,097,601
thyssenkrupp AG		83,574		323,286
				33,709,114
Hong Kong — 2.2%
AIA Group Ltd.		297,800		2,633,386
Prudential PLC		287,992		2,686,548
				5,319,934
India — 1.0%
Axis Bank Ltd.		35,282		519,747
HDFC Bank Ltd. ADR		31,593		1,976,458
				2,496,205
Indonesia — 0.2%
Bank Mandiri Persero Tbk. PT		869,400		397,541
Ireland — 0.6%
AIB Group PLC		268,821		1,540,991
Israel — 0.7%
Check Point Software Technologies Ltd. (a)		8,645		1,666,842
Italy — 3.7%
Eni SpA (b)		109,263		1,671,805
Intesa Sanpaolo SpA		918,898		3,933,188
Ryanair Holdings PLC Sponsored ADR		73,863		3,337,108
				8,942,101

MML International Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Japan — 12.0%
Daikin Industries Ltd.		16,600	$	2,330,958
Denso Corp.		134,900		2,007,984
Fujitsu Ltd.		39,400		808,286
Hitachi Ltd.		190,200		5,024,837
Hoya Corp.		9,100		1,260,088
Komatsu Ltd.		31,500		873,779
Kose Corp.		14,800		958,930
Kyocera Corp.		113,200		1,313,429
Mitsubishi Electric Corp.		115,500		1,861,376
Olympus Corp.		100,300		1,903,652
Seven & i Holdings Co. Ltd.		118,200		1,770,066
Shin-Etsu Chemical Co. Ltd.		49,500		2,070,438
SMC Corp.		3,200		1,423,928
Sony Group Corp.		119,000		2,311,151
Terumo Corp.		81,200		1,531,655
ZOZO, Inc. (b)		39,500		1,435,585
				28,886,142
Luxembourg — 0.5%
Eurofins Scientific SE		18,800		1,191,540
Netherlands — 2.5%
Akzo Nobel NV		18,635		1,314,394
EXOR NV		9,505		1,018,715
ING Groep NV Series N		156,392		2,844,506
Koninklijke Ahold Delhaize NV		23,600		815,426
				5,993,041
Portugal — 0.5%
Galp Energia SGPS SA		65,395		1,227,879
Republic of Korea — 1.0%
NAVER Corp.		9,280		1,208,288
Samsung Electronics Co. Ltd. GDR (c)		1,045		1,225,190
				2,433,478
Singapore — 0.9%
DBS Group Holdings Ltd.		74,460		2,211,428
Spain — 1.1%
Amadeus IT Group SA		36,551		2,638,181
Sweden — 1.0%
Sandvik AB		29,000		648,010
SKF AB Class B		48,100		956,868
Volvo AB Class B		30,470		805,525
				2,410,403
Switzerland — 7.8%
Cie Financiere Richemont SA Registered Class A		24,379		3,865,102
Julius Baer Group Ltd.		16,025		965,546
Novartis AG Registered		34,575		3,980,128
Schindler Holding AG		1,495		438,317
Sika AG Registered		4,013		1,331,389
Sonova Holding AG Registered		3,855		1,384,690

MML International Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Swatch Group AG (b)		5,399	$	1,158,561
UBS Group AG Registered		95,445		2,946,857
Zurich Insurance Group AG		4,508		2,719,356
				18,789,946
Taiwan — 1.3%
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR		17,965		3,119,982
United Kingdom — 10.0%
Ashtead Group PLC		11,170		867,029
Bunzl PLC		3,500		165,586
Compass Group PLC		128,435		4,115,095
Diageo PLC		62,767		2,190,068
Lloyds Banking Group PLC		2,379,984		1,868,825
London Stock Exchange Group PLC		16,248		2,221,605
Reckitt Benckiser Group PLC		23,180		1,419,492
RELX PLC		64,112		3,029,018
Rolls-Royce Holdings PLC (a)		342,497		2,418,819
Schroders PLC		297,507		1,391,715
Smith & Nephew PLC		53,700		834,862
Smiths Group PLC		24,200		543,536
Tesco PLC		334,640		1,604,365
WPP PLC		137,192		1,402,056
				24,072,071
United States — 9.8%
CNH Industrial NV		246,453		2,735,628
Experian PLC		63,659		3,353,684
Holcim AG		4,024		393,435
Linde PLC (LIN US)		3,667		1,748,646
Nestle SA Registered		37,504		3,779,767
Qiagen NV		30,044		1,351,099
Roche Holding AG		14,681		4,699,604
Schneider Electric SE		19,293		5,104,196
Smurfit WestRock PLC		10,400		513,968
				23,680,027

TOTAL COMMON STOCK (Cost $209,327,646)				234,772,532

PREFERRED STOCK — 0.5%
Republic of Korea — 0.5%
Samsung Electronics Co. Ltd. 2.130%
		30,300		1,184,173

TOTAL PREFERRED STOCK (Cost $1,457,489)				1,184,173

TOTAL EQUITIES (Cost $210,785,135)				235,956,705

TOTAL LONG-TERM INVESTMENTS (Cost $210,785,135)				235,956,705

MML International Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 1.8%

Investment of Cash Collateral from Securities Loaned — 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		529,301	$	529,301

	Principal Amount
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (e)	$	3,733,059		3,733,059

TOTAL SHORT-TERM INVESTMENTS (Cost $4,262,360)				4,262,360

TOTAL INVESTMENTS — 99.7% (Cost $215,047,495) (f)				240,219,065

Other Assets/(Liabilities) — 0.3%				702,845

NET ASSETS — 100.0%			$	240,921,910

Abbreviation Legend

ADR	American Depositary Receipt

GDR	Global 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 September 30, 2024, was $4,636,890 or 1.92% of net assets. The Fund received $4,373,775 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)

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

(e)	Maturity value of $3,733,217. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $3,807,942.

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

MML Large Cap Growth Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.3%

COMMON STOCK — 99.3%
Communication Services — 21.5%
Alphabet, Inc. Class A		58,822	$	9,755,629
Alphabet, Inc. Class C		19,800		3,310,362
Meta Platforms, Inc. Class A		30,016		17,182,359
Netflix, Inc. (a)		15,918		11,290,160
Walt Disney Co.		56,965		5,479,463
				47,017,973
Consumer Discretionary — 18.5%
Alibaba Group Holding Ltd. Sponsored ADR		18,565		1,970,118
Amazon.com, Inc. (a)		70,133		13,067,882
NIKE, Inc. Class B		27,397		2,421,895
Starbucks Corp.		37,802		3,685,317
Tesla, Inc. (a)		61,691		16,140,216
Yum China Holdings, Inc.		18,149		817,068
Yum! Brands, Inc.		15,512		2,167,181
				40,269,677
Consumer Staples — 2.4%
Monster Beverage Corp. (a)		101,738		5,307,671
Financials — 8.9%
Block, Inc. (a)		28,495		1,912,870
FactSet Research Systems, Inc.		5,906		2,715,874
PayPal Holdings, Inc. (a)		25,842		2,016,451
SEI Investments Co.		33,643		2,327,759
Visa, Inc. Class A		37,567		10,329,047
				19,302,001
Health Care — 12.6%
Illumina, Inc. (a)		16,759		2,185,541
Intuitive Surgical, Inc. (a)		6,843		3,361,761
Novartis AG Sponsored ADR (b)		22,416		2,578,288
Novo Nordisk AS Sponsored ADR		33,697		4,012,302
Regeneron Pharmaceuticals, Inc. (a)		4,423		4,649,635
Roche Holding AG Sponsored ADR (b)		50,990		2,037,050
Thermo Fisher Scientific, Inc.		5,229		3,234,503
Vertex Pharmaceuticals, Inc. (a)		11,891		5,530,266
				27,589,346
Industrials — 5.8%
Boeing Co. (a)		56,163		8,539,022
Deere & Co.		2,763		1,153,083

MML Large Cap Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Expeditors International of Washington, Inc.		22,415	$	2,945,331
				12,637,436
Information Technology — 29.6%
Autodesk, Inc. (a)		22,605		6,227,225
Microsoft Corp.		24,127		10,381,848
NVIDIA Corp.		166,568		20,228,018
Oracle Corp.		67,961		11,580,554
QUALCOMM, Inc.		21,695		3,689,235
Salesforce, Inc.		22,694		6,211,575
Shopify, Inc. Class A (a)		55,091		4,414,993
Workday, Inc. Class A (a)		7,877		1,925,218
				64,658,666

TOTAL COMMON STOCK (Cost $143,985,775)				216,782,770

TOTAL EQUITIES (Cost $143,985,775)				216,782,770

TOTAL LONG-TERM INVESTMENTS (Cost $143,985,775)				216,782,770


SHORT-TERM INVESTMENTS — 1.7%
Investment of Cash Collateral from Securities Loaned — 0.9%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		2,057,060		2,057,060

	Principal Amount
Repurchase Agreement — 0.8%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (d)	$	1,736,758		1,736,758

TOTAL SHORT-TERM INVESTMENTS (Cost $3,793,818)				3,793,818

TOTAL INVESTMENTS — 101.0% (Cost $147,779,593) (e)				220,576,588

Other Assets/(Liabilities) — (1.0)%				(2,252,159)

NET ASSETS — 100.0%			$	218,324,429

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 September 30, 2024, was $2,917,398 or 1.34% of net assets. The Fund received $928,556 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 $1,736,831. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $1,771,681.

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

MML Managed Volatility Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.8%

COMMON STOCK — 98.8%
Communication Services — 8.8%
Alphabet, Inc. Class A (a)		11,790	$	1,955,372
Alphabet, Inc. Class C (a)		10,336		1,728,076
AT&T, Inc. (a)		14,781		325,182
Charter Communications, Inc. Class A (a) (b)		210		68,057
Comcast Corp. Class A (a)		7,974		333,074
Electronic Arts, Inc. (a)		521		74,732
Fox Corp. Class A (a)		381		16,128
Fox Corp. Class B (a)		321		12,455
Interpublic Group of Cos., Inc. (a)		850		26,886
Live Nation Entertainment, Inc. (a) (b)		319		34,927
Match Group, Inc. (a) (b)		612		23,158
Meta Platforms, Inc. Class A (a)		4,535		2,596,015
Netflix, Inc. (a) (b)		889		630,541
News Corp. Class A (a)		418		11,131
News Corp. Class B (a)		511		14,282
Omnicom Group, Inc. (a)		412		42,597
Paramount Global Class B (a)		1,014		10,769
T-Mobile US, Inc. (a)		1,012		208,836
Take-Two Interactive Software, Inc. (a) (b)		329		50,571
Verizon Communications, Inc. (a)		8,775		394,085
Walt Disney Co. (a)		3,818		367,253
Warner Bros Discovery, Inc. (a) (b)		4,696		38,742
				8,962,869
Consumer Discretionary — 10.0%
Airbnb, Inc. Class A (a) (b)		919		116,538
Amazon.com, Inc. (a) (b)		19,390		3,612,939
Aptiv PLC (a) (b)		590		42,486
AutoZone, Inc. (a) (b)		36		113,401
Bath & Body Works, Inc. (a)		510		16,279
Best Buy Co., Inc. (a)		410		42,353
Booking Holdings, Inc. (a)		69		290,636
BorgWarner, Inc. (a)		509		18,472
Caesars Entertainment, Inc. (a) (b)		454		18,950
CarMax, Inc. (a) (b)		349		27,006
Carnival Corp. (a) (b)		2,127		39,307
Chipotle Mexican Grill, Inc. (a) (b)		2,807		161,739
Darden Restaurants, Inc. (a)		239		39,227
Deckers Outdoor Corp. (a) (b)		336		53,575
Domino's Pizza, Inc. (a)		73		31,400
DR Horton, Inc. (a)		616		117,514
eBay, Inc. (a)		1,045		68,040
Expedia Group, Inc. (a) (b)		275		40,706
Ford Motor Co. (a)		8,391		88,609
Garmin Ltd. (a)		335		58,970
General Motors Co. (a)		2,287		102,549

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Genuine Parts Co. (a)		278	$	38,831
Hasbro, Inc. (a)		276		19,960
Hilton Worldwide Holdings, Inc. (a)		524		120,782
Home Depot, Inc. (a)		2,053		831,876
Las Vegas Sands Corp. (a)		796		40,071
Lennar Corp. Class A (a)		517		96,927
LKQ Corp. (a)		535		21,357
Lowe's Cos., Inc. (a)		1,172		317,436
Lululemon Athletica, Inc. (a) (b)		236		64,039
Marriott International, Inc. Class A (a)		494		122,808
McDonald's Corp. (a)		1,481		450,979
MGM Resorts International (a) (b)		515		20,131
Mohawk Industries, Inc. (a) (b)		120		19,282
NIKE, Inc. Class B (a)		2,464		217,818
Norwegian Cruise Line Holdings Ltd. (a) (b)		976		20,018
NVR, Inc. (a) (b)		6		58,871
O'Reilly Automotive, Inc. (a) (b)		125		143,950
Pool Corp. (a)		81		30,521
PulteGroup, Inc. (a)		419		60,139
Ralph Lauren Corp. (a)		85		16,479
Ross Stores, Inc. (a)		689		103,701
Royal Caribbean Cruises Ltd. (a)		502		89,035
Starbucks Corp. (a)		2,329		227,054
Tapestry, Inc. (a)		507		23,819
Tesla, Inc. (a) (b)		5,757		1,506,204
TJX Cos., Inc. (a)		2,324		273,163
Tractor Supply Co. (a)		228		66,332
Ulta Beauty, Inc. (a) (b)		100		38,912
Wynn Resorts Ltd. (a)		211		20,231
Yum! Brands, Inc. (a)		590		82,429
				10,243,851
Consumer Staples — 5.8%
Altria Group, Inc. (a)		3,614		184,459
Archer-Daniels-Midland Co. (a)		954		56,992
Brown-Forman Corp. Class B (a)		358		17,614
Bunge Global SA (a)		321		31,021
Campbell Soup Co. (a)		325		15,899
Church & Dwight Co., Inc. (a)		528		55,292
Clorox Co. (a)		276		44,963
Coca-Cola Co. (a)		8,125		583,862
Colgate-Palmolive Co. (a)		1,702		176,685
Conagra Brands, Inc. (a)		945		30,731
Constellation Brands, Inc. Class A (a)		329		84,780
Costco Wholesale Corp. (a)		919		814,712
Dollar General Corp. (a)		461		38,987
Dollar Tree, Inc. (a) (b)		429		30,167
Estee Lauder Cos., Inc. Class A (a)		484		48,250
General Mills, Inc. (a)		1,210		89,358
Hershey Co. (a)		316		60,602
Hormel Foods Corp. (a)		709		22,475
J.M. Smucker Co. (a)		215		26,037
Kellanova (a)		544		43,906
Kenvue, Inc. (a)		3,909		90,415
Keurig Dr. Pepper, Inc. (a)		2,192		82,156
Kimberly-Clark Corp. (a)		692		98,458
Kraft Heinz Co. (a)		1,700		59,687
Kroger Co. (a)		1,441		82,569

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Lamb Weston Holdings, Inc. (a)		286	$	18,516
McCormick & Co., Inc. (a)		556		45,759
Molson Coors Beverage Co. Class B (a)		382		21,973
Mondelez International, Inc. Class A (a)		2,847		209,738
Monster Beverage Corp. (a) (b)		1,457		76,012
PepsiCo, Inc. (a)		2,822		479,881
Philip Morris International, Inc. (a)		3,197		388,116
Procter & Gamble Co. (a)		4,874		844,177
Sysco Corp. (a)		1,044		81,495
Target Corp. (a)		968		150,872
Tyson Foods, Inc. Class A (a)		619		36,868
Walgreens Boots Alliance, Inc. (a)		1,705		15,277
Walmart, Inc. (a)		8,976		724,812
				5,963,573
Energy — 3.3%
APA Corp. (a)		701		17,146
Baker Hughes Co. (a)		2,120		76,638
Chevron Corp. (a)		3,511		517,065
ConocoPhillips (a)		2,369		249,408
Coterra Energy, Inc. (a)		1,668		39,949
Devon Energy Corp. (a)		1,391		54,416
Diamondback Energy, Inc. (a)		365		62,926
EOG Resources, Inc. (a)		1,148		141,124
EQT Corp. (a)		1,163		42,612
Exxon Mobil Corp. (a)		9,208		1,079,362
Halliburton Co. (a)		1,837		53,365
Hess Corp. (a)		607		82,430
Kinder Morgan, Inc. (a)		4,207		92,933
Marathon Oil Corp. (a)		1,086		28,920
Marathon Petroleum Corp. (a)		681		110,942
Occidental Petroleum Corp. (a)		1,411		72,723
ONEOK, Inc. (a)		1,211		110,358
Phillips 66 (a)		905		118,962
Schlumberger NV (a)		2,987		125,305
Targa Resources Corp. (a)		461		68,233
Valero Energy Corp. (a)		688		92,901
Williams Cos., Inc. (a)		2,524		115,220
				3,352,938
Financials — 12.7%
Aflac, Inc. (a)		999		111,688
Allstate Corp. (a)		566		107,342
American Express Co. (a)		1,158		314,050
American International Group, Inc. (a)		1,384		101,350
Ameriprise Financial, Inc. (a)		207		97,251
Aon PLC Class A (a)		446		154,312
Arch Capital Group Ltd. (a) (b)		786		87,938
Arthur J Gallagher & Co. (a)		449		126,335
Assurant, Inc. (a)		89		17,699
Bank of America Corp. (a)		14,222		564,329
Bank of New York Mellon Corp. (a)		1,568		112,676
Berkshire Hathaway, Inc. Class B (a) (b)		3,803		1,750,369
BlackRock, Inc. (a)		295		280,105
Blackstone, Inc. (a)		1,525		233,523
Brown & Brown, Inc. (a)		473		49,003
Capital One Financial Corp. (a)		819		122,629

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Cboe Global Markets, Inc. (a)		238	$	48,759
Charles Schwab Corp. (a)		3,170		205,448
Chubb Ltd. (a)		771		222,349
Cincinnati Financial Corp. (a)		347		47,234
Citigroup, Inc. (a)		4,054		253,780
Citizens Financial Group, Inc. (a)		903		37,086
CME Group, Inc. (a)		762		168,135
Corpay, Inc. (a) (b)		142		44,412
Discover Financial Services (a)		508		71,267
Erie Indemnity Co. Class A (a)		49		26,451
Everest Group Ltd. (a)		98		38,399
FactSet Research Systems, Inc. (a)		78		35,868
Fidelity National Information Services, Inc. (a)		1,191		99,746
Fifth Third Bancorp (a)		1,519		65,074
Fiserv, Inc. (a) (b)		1,158		208,035
Franklin Resources, Inc. (a)		675		13,601
Global Payments, Inc. (a)		541		55,409
Globe Life, Inc. (a)		145		15,357
Goldman Sachs Group, Inc. (a)		646		319,841
Hartford Financial Services Group, Inc. (a)		579		68,096
Huntington Bancshares, Inc. (a)		2,788		40,984
Intercontinental Exchange, Inc. (a)		1,235		198,390
Invesco Ltd. (a)		598		10,501
Jack Henry & Associates, Inc. (a)		162		28,599
JP Morgan Chase & Co. (a)		5,905		1,245,128
KeyCorp. (a)		1,841		30,837
KKR & Co., Inc. (a)		1,388		181,245
Loews Corp. (a)		382		30,197
M&T Bank Corp. (a)		324		57,711
MarketAxess Holdings, Inc. (a)		77		19,727
Marsh & McLennan Cos., Inc. (a)		1,029		229,560
Mastercard, Inc. Class A (a)		1,719		848,842
MetLife, Inc. (a)		1,183		97,574
Moody's Corp. (a)		313		148,547
Morgan Stanley (a)		2,613		272,379
MSCI, Inc. (a)		164		95,601
Nasdaq, Inc. (a)		794		57,970
Northern Trust Corp. (a)		350		31,511
PayPal Holdings, Inc. (a) (b)		2,090		163,083
PNC Financial Services Group, Inc. (a)		798		147,510
Principal Financial Group, Inc. (a)		467		40,115
Progressive Corp. (a)		1,230		312,125
Prudential Financial, Inc. (a)		740		89,614
Raymond James Financial, Inc. (a)		361		44,208
Regions Financial Corp. (a)		1,556		36,301
S&P Global, Inc. (a)		679		350,785
State Street Corp. (a)		595		52,640
Synchrony Financial (a)		743		37,061
T. Rowe Price Group, Inc. (a)		444		48,365
Travelers Cos., Inc. (a)		481		112,612
Truist Financial Corp. (a)		2,797		119,628
US Bancorp (a)		3,354		153,378
Visa, Inc. Class A (a)		3,454		949,677
W. R. Berkley Corp. (a)		706		40,051
Wells Fargo & Co. (a)		7,032		397,238
Willis Towers Watson PLC (a)		211		62,146
				13,056,786

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Health Care — 11.5%
Abbott Laboratories (a)		3,643	$	415,338
AbbVie, Inc. (a)		3,664		723,567
Agilent Technologies, Inc. (a)		626		92,948
Align Technology, Inc. (a) (b)		146		37,131
Amgen, Inc. (a)		1,124		362,164
Baxter International, Inc. (a)		1,042		39,565
Becton Dickinson & Co. (a)		610		147,071
Bio-Techne Corp. (a)		363		29,015
Biogen, Inc. (a) (b)		313		60,672
Boston Scientific Corp. (a) (b)		3,018		252,908
Bristol-Myers Squibb Co. (a)		4,238		219,274
Cardinal Health, Inc. (a)		516		57,028
Catalent, Inc. (a) (b)		377		22,835
Cencora, Inc. (a)		355		79,903
Centene Corp. (a) (b)		1,128		84,916
Charles River Laboratories International, Inc. (a) (b)		116		22,849
Cigna Group (a)		576		199,549
The Cooper Cos., Inc. (a) (b)		448		49,432
CVS Health Corp. (a)		2,617		164,557
Danaher Corp. (a)		1,320		366,986
DaVita, Inc. (a) (b)		106		17,377
Dexcom, Inc. (a) (b)		846		56,716
Edwards Lifesciences Corp. (a) (b)		1,248		82,356
Elevance Health, Inc. (a)		478		248,560
Eli Lilly & Co. (a)		1,638		1,451,170
GE HealthCare Technologies, Inc. (a) (b)		896		84,090
Gilead Sciences, Inc. (a)		2,602		218,152
HCA Healthcare, Inc. (a)		381		154,850
Henry Schein, Inc. (a) (b)		261		19,027
Hologic, Inc. (a) (b)		442		36,005
Humana, Inc. (a)		255		80,769
IDEXX Laboratories, Inc. (a) (b)		165		83,361
Incyte Corp. (a) (b)		320		21,152
Insulet Corp. (a) (b)		148		34,447
Intuitive Surgical, Inc. (a) (b)		742		364,522
IQVIA Holdings, Inc. (a) (b)		342		81,044
Johnson & Johnson (a)		4,988		808,355
Labcorp Holdings, Inc. (a)		182		40,673
McKesson Corp. (a)		269		132,999
Medtronic PLC (a)		2,620		235,879
Merck & Co., Inc. (a)		5,256		596,871
Mettler-Toledo International, Inc. (a) (b)		43		64,487
Moderna, Inc. (a) (b)		709		47,382
Molina Healthcare, Inc. (a) (b)		126		43,415
Pfizer, Inc. (a)		11,886		343,981
Quest Diagnostics, Inc. (a)		214		33,224
Regeneron Pharmaceuticals, Inc. (a) (b)		219		230,222
ResMed, Inc. (a)		310		75,677
Revvity, Inc. (a)		273		34,876
Solventum Corp. (a) (b)		285		19,870
STERIS PLC (a)		206		49,963
Stryker Corp. (a)		719		259,746
Teleflex, Inc. (a)		106		26,216
Thermo Fisher Scientific, Inc. (a)		796		492,382
UnitedHealth Group, Inc. (a)		1,916		1,120,247
Universal Health Services, Inc. Class B (a)		121		27,710
Vertex Pharmaceuticals, Inc. (a) (b)		533		247,888

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Viatris, Inc. (a)		2,292	$	26,610
Waters Corp. (a) (b)		123		44,266
West Pharmaceutical Services, Inc. (a)		144		43,223
Zimmer Biomet Holdings, Inc. (a)		399		43,072
Zoetis, Inc. (a)		930		181,703
				11,732,243
Industrials — 8.4%
3M Co. (a)		1,165		159,255
A.O. Smith Corp. (a)		241		21,649
Allegion PLC (a)		194		28,274
Amentum Holdings, Inc. (b)		280		9,030
AMETEK, Inc. (a)		480		82,421
Automatic Data Processing, Inc. (a)		831		229,963
Axon Enterprise, Inc. (a) (b)		147		58,741
Boeing Co. (a) (b)		1,207		183,512
Broadridge Financial Solutions, Inc. (a)		262		56,338
Builders FirstSource, Inc. (a) (b)		250		48,465
C.H. Robinson Worldwide, Inc. (a)		274		30,241
Carrier Global Corp. (a)		1,770		142,467
Caterpillar, Inc. (a)		999		390,729
Cintas Corp. (a)		717		147,616
Copart, Inc. (a) (b)		1,814		95,054
CSX Corp. (a)		4,064		140,330
Cummins, Inc. (a)		297		96,166
Dayforce, Inc. (a) (b) (c)		314		19,233
Deere & Co. (a)		539		224,941
Delta Air Lines, Inc. (a)		1,369		69,532
Dover Corp. (a)		272		52,153
Eaton Corp. PLC (a)		833		276,090
Emerson Electric Co. (a)		1,230		134,525
Equifax, Inc. (a)		254		74,640
Expeditors International of Washington, Inc. (a)		318		41,785
Fastenal Co. (a)		1,241		88,632
FedEx Corp. (a)		465		127,261
Fortive Corp. (a)		750		59,198
GE Vernova, Inc. (a) (b)		575		146,613
Generac Holdings, Inc. (a) (b)		124		19,701
General Dynamics Corp. (a)		526		158,957
General Electric Co. (a)		2,240		422,419
Honeywell International, Inc. (a)		1,328		274,511
Howmet Aerospace, Inc. (a)		796		79,799
Hubbell, Inc. (a)		115		49,260
Huntington Ingalls Industries, Inc. (a)		90		23,794
IDEX Corp. (a)		161		34,535
Illinois Tool Works, Inc. (a)		537		140,732
Ingersoll Rand, Inc. (a)		831		81,571
Jacobs Solutions, Inc. (a)		280		36,652
JB Hunt Transport Services, Inc. (a)		169		29,124
Johnson Controls International PLC (a)		1,399		108,576
L3Harris Technologies, Inc. (a)		410		97,527
Leidos Holdings, Inc. (a)		297		48,411
Lockheed Martin Corp. (a)		443		258,960
Masco Corp. (a)		439		36,850
Nordson Corp. (a)		120		31,516
Norfolk Southern Corp. (a)		480		119,280
Northrop Grumman Corp. (a)		290		153,140
Old Dominion Freight Line, Inc. (a)		372		73,894

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Otis Worldwide Corp. (a)		810	$	84,191
PACCAR, Inc. (a)		1,053		103,910
Parker-Hannifin Corp. (a)		259		163,641
Paychex, Inc. (a)		661		88,700
Paycom Software, Inc. (a)		100		16,657
Pentair PLC (a)		337		32,955
Quanta Services, Inc. (a)		306		91,234
Republic Services, Inc. (a)		415		83,349
Rockwell Automation, Inc. (a)		239		64,162
Rollins, Inc. (a)		651		32,928
RTX Corp. (a)		2,814		340,944
Snap-on, Inc. (a)		105		30,420
Southwest Airlines Co. (a)		1,243		36,830
Stanley Black & Decker, Inc. (a)		310		34,140
Textron, Inc. (a)		371		32,863
Trane Technologies PLC (a)		458		178,038
TransDigm Group, Inc. (a)		114		162,693
Uber Technologies, Inc. (a) (b)		4,384		329,501
Union Pacific Corp. (a)		1,273		313,769
United Airlines Holdings, Inc. (a) (b)		736		41,996
United Parcel Service, Inc. Class B (a)		1,459		198,920
United Rentals, Inc. (a)		132		106,884
Veralto Corp. (a)		467		52,239
Verisk Analytics, Inc. (a)		297		79,584
W.W. Grainger, Inc. (a)		92		95,571
Waste Management, Inc. (a)		759		157,568
Westinghouse Air Brake Technologies Corp. (a)		355		64,528
Xylem, Inc. (a)		525		70,891
				8,603,169
Information Technology — 31.3%
Accenture PLC Class A (a)		1,315		464,826
Adobe, Inc. (a) (b)		918		475,322
Advanced Micro Devices, Inc. (a) (b)		3,353		550,160
Akamai Technologies, Inc. (a) (b)		276		27,862
Amphenol Corp. Class A (a)		2,558		166,679
Analog Devices, Inc. (a)		1,033		237,766
ANSYS, Inc. (a) (b)		184		58,628
Apple, Inc. (a)		31,583		7,358,839
Applied Materials, Inc. (a)		1,701		343,687
Arista Networks, Inc. (a) (b)		540		207,263
Autodesk, Inc. (a) (b)		442		121,762
Broadcom, Inc. (a)		9,662		1,666,695
Cadence Design Systems, Inc. (a) (b)		575		155,842
CDW Corp. (a)		276		62,459
Cisco Systems, Inc. (a)		8,463		450,401
Cognizant Technology Solutions Corp. Class A (a)		1,057		81,579
Corning, Inc. (a)		1,587		71,653
Crowdstrike Holdings, Inc. Class A (a) (b)		489		137,150
Dell Technologies, Inc. Class C (a)		588		69,702
Enphase Energy, Inc. (a) (b)		287		32,437
EPAM Systems, Inc. (a) (b)		107		21,296
F5, Inc. (a) (b)		102		22,460
Fair Isaac Corp. (a) (b)		51		99,120
First Solar, Inc. (a) (b)		227		56,623
Fortinet, Inc. (a) (b)		1,357		105,235
Gartner, Inc. (a) (b)		163		82,602
Gen Digital, Inc. (a)		1,143		31,352

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
GoDaddy, Inc. Class A (a) (b)		299	$	46,877
Hewlett Packard Enterprise Co. (a)		2,733		55,917
HP, Inc. (a)		1,872		67,149
Intel Corp. (a)		8,817		206,847
International Business Machines Corp. (a)		1,903		420,715
Intuit, Inc. (a)		586		363,906
Jabil, Inc. (a)		254		30,437
Juniper Networks, Inc. (a)		628		24,479
Keysight Technologies, Inc. (a) (b)		351		55,784
KLA Corp. (a)		285		220,707
Lam Research Corp. (a)		271		221,158
Microchip Technology, Inc. (a)		1,057		84,867
Micron Technology, Inc. (a)		2,319		240,503
Microsoft Corp. (a)		15,435		6,641,681
Monolithic Power Systems, Inc. (a)		101		93,375
Motorola Solutions, Inc. (a)		352		158,270
NetApp, Inc. (a)		420		51,874
NVIDIA Corp. (a)		51,093		6,204,734
NXP Semiconductors NV (a)		544		130,565
ON Semiconductor Corp. (a) (b)		928		67,382
Oracle Corp. (a)		3,314		564,706
Palantir Technologies, Inc. Class A (a) (b)		4,160		154,752
Palo Alto Networks, Inc. (a) (b)		668		228,322
PTC, Inc. (a) (b)		265		47,875
Qorvo, Inc. (a) (b)		194		20,040
QUALCOMM, Inc. (a)		2,341		398,087
Roper Technologies, Inc. (a)		219		121,860
Salesforce, Inc. (a)		2,002		547,967
Seagate Technology Holdings PLC (a)		401		43,922
ServiceNow, Inc. (a) (b)		424		379,221
Skyworks Solutions, Inc. (a)		329		32,495
Super Micro Computer, Inc. (a) (b)		107		44,555
Synopsys, Inc. (a) (b)		323		163,564
TE Connectivity PLC (a) (b)		621		93,765
Teledyne Technologies, Inc. (a) (b)		86		37,639
Teradyne, Inc. (a)		310		41,518
Texas Instruments, Inc. (a)		1,887		389,798
Trimble, Inc. (a) (b)		563		34,957
Tyler Technologies, Inc. (a) (b)		91		53,119
VeriSign, Inc. (a) (b)		165		31,343
Western Digital Corp. (a) (b)		708		48,349
Zebra Technologies Corp. Class A (a) (b)		105		38,884
				32,063,365
Materials — 2.2%
Air Products & Chemicals, Inc. (a)		450		133,983
Albemarle Corp. (a) (c)		238		22,541
Amcor PLC (a)		3,035		34,387
Avery Dennison Corp. (a)		187		41,282
Ball Corp. (a)		645		43,802
Celanese Corp. (a)		201		27,328
CF Industries Holdings, Inc. (a)		372		31,918
Corteva, Inc. (a)		1,443		84,834
Dow, Inc. (a)		1,368		74,734
DuPont de Nemours, Inc. (a)		885		78,862
Eastman Chemical Co. (a)		242		27,092
Ecolab, Inc. (a)		531		135,580
FMC Corp. (a)		254		16,749

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Freeport-McMoRan, Inc. (a)		3,024	$	150,958
International Flavors & Fragrances, Inc. (a)		560		58,761
International Paper Co. (a)		732		35,758
Linde PLC (LIN US) (a)		992		473,045
LyondellBasell Industries NV Class A (a)		587		56,293
Martin Marietta Materials, Inc. (a)		129		69,434
Mosaic Co. (a)		720		19,282
Newmont Corp. (NEM US) (a)		2,441		130,471
Nucor Corp. (a)		469		70,510
Packaging Corp. of America (a)		159		34,249
PPG Industries, Inc. (a)		503		66,627
Sherwin-Williams Co. (a)		486		185,492
Smurfit WestRock PLC (a)		974		48,135
Steel Dynamics, Inc. (a)		293		36,941
Vulcan Materials Co. (a)		280		70,120
				2,259,168
Real Estate — 2.3%
Alexandria Real Estate Equities, Inc. (a)		349		41,444
American Tower Corp. (a)		974		226,514
AvalonBay Communities, Inc. (a)		300		67,575
BXP, Inc. (a)		328		26,391
Camden Property Trust (a)		260		32,118
CBRE Group, Inc. Class A (a) (b)		630		78,422
CoStar Group, Inc. (a) (b)		859		64,803
Crown Castle, Inc. (a)		903		107,123
Digital Realty Trust, Inc. (a)		630		101,953
Equinix, Inc. (a)		195		173,088
Equity Residential (a)		722		53,760
Essex Property Trust, Inc. (a)		122		36,041
Extra Space Storage, Inc. (a)		460		82,887
Federal Realty Investment Trust (a)		55		6,323
Healthpeak Properties, Inc. (a)		1,582		36,180
Host Hotels & Resorts, Inc. (a)		1,224		21,542
Invitation Homes, Inc. (a)		1,109		39,103
Iron Mountain, Inc. (a)		620		73,675
Kimco Realty Corp. (a)		1,452		33,716
Mid-America Apartment Communities, Inc. (a)		241		38,295
Prologis, Inc. (a)		1,892		238,922
Public Storage (a)		345		125,535
Realty Income Corp. (a)		1,779		112,824
Regency Centers Corp. (a)		293		21,163
SBA Communications Corp. (a)		219		52,713
Simon Property Group, Inc. (a)		653		110,370
UDR, Inc. (a)		640		29,018
Ventas, Inc. (a)		810		51,945
VICI Properties, Inc. (a)		2,099		69,918
Welltower, Inc. (a)		1,196		153,124
Weyerhaeuser Co. (a)		1,492		50,519
				2,357,004
Utilities — 2.5%
AES Corp. (a)		1,400		28,084
Alliant Energy Corp. (a)		481		29,192
Ameren Corp. (a)		613		53,613
American Electric Power Co., Inc. (a)		1,078		110,603
American Water Works Co., Inc. (a)		428		62,591

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Atmos Energy Corp. (a)		302	$	41,890
CenterPoint Energy, Inc. (a)		1,254		36,893
CMS Energy Corp. (a)		454		32,066
Consolidated Edison, Inc. (a)		664		69,142
Constellation Energy Corp. (a)		646		167,973
Dominion Energy, Inc. (a)		1,813		104,773
DTE Energy Co. (a)		450		57,785
Duke Energy Corp. (a)		1,605		185,057
Edison International (a)		816		71,065
Entergy Corp. (a)		502		66,068
Evergy, Inc. (a)		381		23,626
Eversource Energy (a)		811		55,189
Exelon Corp. (a)		1,879		76,193
FirstEnergy Corp. (a)		1,189		52,732
NextEra Energy, Inc. (a)		4,250		359,252
NiSource, Inc. (a)		1,069		37,041
NRG Energy, Inc. (a)		420		38,262
PG&E Corp. (a)		4,783		94,560
Pinnacle West Capital Corp. (a)		241		21,350
PPL Corp. (a)		1,387		45,882
Public Service Enterprise Group, Inc. (a)		1,052		93,849
Sempra (a)		1,384		115,744
Southern Co. (a)		2,276		205,250
Vistra Corp. (a)		704		83,452
WEC Energy Group, Inc. (a)		646		62,132
Xcel Energy, Inc. (a)		1,133		73,985
				2,555,294

TOTAL COMMON STOCK (Cost $54,137,476)				101,150,260

TOTAL EQUITIES (Cost $54,137,476)				101,150,260


	Principal Amount
BONDS & NOTES — 0.0%
CORPORATE DEBT — 0.0%
Forest Products & Paper — 0.0%
Sino Forest Corp.
5.000% 8/01/49 (a) (d) (e)	$	359,000		—

TOTAL CORPORATE DEBT (Cost $0)				—

TOTAL BONDS & NOTES (Cost $0)				—

TOTAL PURCHASED OPTIONS(#) — 0.6% (Cost $1,028,838)				621,475

	Number of Shares
RIGHTS — 0.0%
Health Care — 0.0%
Abiomed, Inc., CVR (a) (b) (d) (e)		136		—

MML Managed Volatility Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
TOTAL RIGHTS (Cost $139)			$	—

TOTAL LONG-TERM INVESTMENTS (Cost $55,166,453)				101,771,735

	Principal Amount
SHORT-TERM INVESTMENTS — 1.6%
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (f)	$	1,663,797		1,663,797

TOTAL SHORT-TERM INVESTMENTS (Cost $1,663,797)				1,663,797

TOTAL INVESTMENTS — 101.0% (Cost $56,830,250) (g)				103,435,532

Other Assets/(Liabilities) — (1.0)%				(1,036,078)

NET ASSETS — 100.0%			$	102,399,454

Abbreviation Legend

CVR	Contingent Value Rights

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

(b)	Non-income producing security.

(c)

Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2024, was $32,136 or 0.03% of net assets. The Fund received $32,804 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)	Investment is valued using significant unobservable inputs.

(e)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2024, these securities amounted to a value of $0 or 0.00% of net assets.

(f)	Maturity value of $1,663,867. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $1,697,122.

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

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Put
S&P 500 Index	11/15/24		5,150.00		25	USD	12,875,000	$	50,250	$	121,613	$	(71,363)
S&P 500 Index	11/15/24		5,200.00		25	USD	13,000,000		56,300		113,637		(57,337)
S&P 500 Index	12/20/24		4,950.00		25	USD	12,375,000		69,550		199,438		(129,888)
S&P 500 Index	12/20/24		5,050.00		25	USD	12,625,000		75,000		139,588		(64,588)
S&P 500 Index	12/20/24		5,300.00		25	USD	13,250,000		126,125		138,462		(12,337)
S&P 500 Index	1/17/25		5,050.00		25	USD	12,625,000		111,750		166,663		(54,913)
S&P 500 Index	1/17/25		5,200.00		25	USD	13,000,000		132,500		149,437		(16,937)
								$	621,475	$	1,028,838	$	(407,363)

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid/(Received)		Unrealized Appreciation (Depreciation)
Call
S&P 500 Index	10/18/24		5,650.00		19	USD	10,735,000	$	(275,690)	$	(159,003)	$	(116,687)
S&P 500 Index	10/18/24		5,850.00		20	USD	11,700,000		(52,980)		(86,470)		33,490
S&P 500 Index	10/18/24		5,875.00		19	USD	11,162,500		(35,720)		(86,910)		51,190
S&P 500 Index	10/18/24		5,900.00		19	USD	11,210,000		(24,833)		(87,999)		63,166
S&P 500 Index	11/15/24		5,650.00		20	USD	11,300,000		(392,280)		(259,310)		(132,970)
S&P 500 Index	11/15/24		5,700.00		19	USD	10,830,000		(327,674)		(194,360)		(133,314)
S&P 500 Index	11/15/24		5,900.00		20	USD	11,800,000		(125,080)		(98,618)		(26,462)
S&P 500 Index	12/20/24		5,900.00		20	USD	11,800,000		(209,480)		(200,530)		(8,950)
S&P 500 Index	12/20/24		6,000.00		19	USD	11,400,000		(119,244)		(99,825)		(19,419)
								$	(1,562,981)	$	(1,273,025)	$	(289,956)

Currency Legend

USD	U.S. Dollar

MML Mid Cap Growth Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 96.5%

COMMON STOCK — 96.3%
Communication Services — 6.5%
Liberty Media Corp-Liberty Formula One Class C (a)		60,317	$	4,670,345
Match Group, Inc. (a) (b)		39,495		1,494,491
New York Times Co. Class A		26,500		1,475,255
Pinterest, Inc. Class A (a)		79,541		2,574,742
Reddit, Inc. Class A (a) (b)		11,970		789,063
Roku, Inc. (a)		8,000		597,280
Spotify Technology SA (a)		4,800		1,768,944
Take-Two Interactive Software, Inc. (a) (b)		15,455		2,375,588
Trade Desk, Inc. Class A (a)		55,600		6,096,540
				21,842,248
Consumer Discretionary — 11.4%
Bath & Body Works, Inc.		38,377		1,224,994
Birkenstock Holding PLC (a)		15,157		747,089
Bright Horizons Family Solutions, Inc. (a)		9,000		1,261,170
Burlington Stores, Inc. (a)		8,843		2,329,954
Domino's Pizza, Inc.		9,702		4,173,218
DraftKings, Inc. Class A (a)		132,687		5,201,330
Five Below, Inc. (a)		13,400		1,183,890
Hilton Worldwide Holdings, Inc.		14,600		3,365,300
Lululemon Athletica, Inc. (a)		2,400		651,240
O'Reilly Automotive, Inc. (a)		2,084		2,399,934
On Holding AG, Class A (a)		38,783		1,944,967
Planet Fitness, Inc. Class A (a) (b)		15,700		1,275,154
Ross Stores, Inc.		37,447		5,636,148
Tractor Supply Co.		2,185		635,682
Ulta Beauty, Inc. (a)		4,899		1,906,299
Viking Holdings Ltd. (a)		32,130		1,121,016
Yum! Brands, Inc.		23,607		3,298,134
				38,355,519
Consumer Staples — 4.0%
Boston Beer Co., Inc. Class A (a)		1,594		460,889
Casey's General Stores, Inc.		6,300		2,366,973
Constellation Brands, Inc. Class A		4,400		1,133,836
Dollar General Corp.		5,374		454,479
Dollar Tree, Inc. (a)		35,829		2,519,496
elf Beauty, Inc. (a) (b)		10,674		1,163,786
Freshpet, Inc. (a)		14,313		1,957,589
Maplebear, Inc. (a)		15,900		647,766
McCormick & Co., Inc.		11,700		962,910
Reynolds Consumer Products, Inc.		31,800		988,980
TreeHouse Foods, Inc. (a) (b)		18,607		781,122
				13,437,826

MML Mid Cap Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Energy — 4.4%
Cheniere Energy, Inc.		39,440	$	7,092,889
Chesapeake Energy Corp. (b)		13,500		1,110,375
EQT Corp.		59,200		2,169,088
Range Resources Corp.		27,100		833,596
TechnipFMC PLC		98,008		2,570,750
Weatherford International PLC		10,400		883,168
				14,659,866
Financials — 8.8%
ARES Management Corp. Class A		26,994		4,206,745
Assurant, Inc.		15,600		3,102,216
Axis Capital Holdings Ltd.		11,600		923,476
Cboe Global Markets, Inc.		10,200		2,089,674
Corpay, Inc. (a)		7,200		2,251,872
Intercontinental Exchange, Inc.		14,000		2,248,960
KKR & Co., Inc.		3,500		457,030
Markel Group, Inc. (a)		550		862,719
MarketAxess Holdings, Inc.		8,000		2,049,600
Nasdaq, Inc.		36,888		2,693,193
Raymond James Financial, Inc.		15,700		1,922,622
Toast, Inc., Class A (a) (b)		47,200		1,336,232
TPG, Inc.		6,000		345,360
Tradeweb Markets, Inc. Class A		41,111		5,084,197
				29,573,896
Health Care — 20.5%
Acadia Healthcare Co., Inc. (a) (b)		23,800		1,509,158
Agilent Technologies, Inc.		31,400		4,662,272
Alcon, Inc.		25,000		2,501,750
Align Technology, Inc. (a)		17,560		4,465,859
Alnylam Pharmaceuticals, Inc. (a)		19,772		5,437,893
Apellis Pharmaceuticals, Inc. (a)		9,550		275,422
Argenx SE ADR (a)		1,823		988,212
Ascendis Pharma AS ADR (a)		5,782		863,310
Avantor, Inc. (a) (b)		157,900		4,084,873
Biogen, Inc. (a)		10,100		1,957,784
Bruker Corp.		36,058		2,490,165
The Cooper Cos., Inc. (a)		26,900		2,968,146
CRISPR Therapeutics AG (a) (b)		8,175		384,061
Cytokinetics, Inc. (a) (b)		16,100		850,080
Enovis Corp. (a)		25,978		1,118,353
Exact Sciences Corp. (a) (b)		33,958		2,313,219
Hologic, Inc. (a)		83,100		6,769,326
ICON PLC (a)		6,480		1,861,769
Insmed, Inc. (a)		2,074		151,402
Ionis Pharmaceuticals, Inc. (a) (b)		42,216		1,691,173
Mettler-Toledo International, Inc. (a)		990		1,484,703
Molina Healthcare, Inc. (a)		6,100		2,101,816
Natera, Inc. (a)		16,012		2,032,723
Penumbra, Inc. (a)		225		43,720
Quidelortho Corp. (a) (b)		25,733		1,173,425
Sarepta Therapeutics, Inc. (a)		7,220		901,706
Teleflex, Inc.		22,740		5,624,057
Vaxcyte, Inc. (a)		6,530		746,183
Veeva Systems, Inc. Class A (a)		32,365		6,792,443

MML Mid Cap Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
West Pharmaceutical Services, Inc.		2,835	$	850,954
				69,095,957
Industrials — 15.2%
Axon Enterprise, Inc. (a)		6,854		2,738,858
Broadridge Financial Solutions, Inc.		10,400		2,236,312
Builders FirstSource, Inc. (a)		8,439		1,635,985
BWX Technologies, Inc.		43,097		4,684,644
Clean Harbors, Inc. (a)		14,554		3,517,847
Equifax, Inc.		10,700		3,144,302
Esab Corp.		24,683		2,624,050
Ferguson Enterprises, Inc.		6,400		1,270,848
Fortive Corp.		37,071		2,926,014
GE Vernova, Inc. (a)		6,199		1,580,621
Howmet Aerospace, Inc.		5,000		501,250
IDEX Corp.		6,600		1,415,700
Ingersoll Rand, Inc.		39,600		3,887,136
ITT, Inc.		2,000		299,020
JB Hunt Transport Services, Inc.		20,400		3,515,532
Paylocity Holding Corp. (a)		14,283		2,356,266
Quanta Services, Inc.		3,000		894,450
Southwest Airlines Co. (b)		4,000		118,520
Textron, Inc.		49,593		4,392,948
TransUnion		14,203		1,487,054
UL Solutions, Inc. Class A		7,092		349,636
United Rentals, Inc.		2,270		1,838,087
Veralto Corp.		12,800		1,431,808
Verisk Analytics, Inc.		5,500		1,473,780
Waste Connections, Inc.		5,300		947,746
				51,268,414
Information Technology — 20.3%
Amphenol Corp. Class A		22,100		1,440,036
Aspen Technology, Inc. (a) (b)		7,932		1,894,320
Atlassian Corp. Class A (a)		7,100		1,127,551
CCC Intelligent Solutions Holdings, Inc. (a)		200,201		2,212,221
CDW Corp.		19,593		4,433,896
Cognex Corp. (b)		21,200		858,600
Coherent Corp. (a)		23,914		2,126,194
Crowdstrike Holdings, Inc. Class A (a)		1,310		367,416
Fair Isaac Corp. (a)		1,400		2,720,928
Fortinet, Inc. (a)		26,400		2,047,320
Gartner, Inc. (a)		6,247		3,165,730
HubSpot, Inc. (a)		5,381		2,860,539
Keysight Technologies, Inc. (a)		16,000		2,542,880
Lattice Semiconductor Corp. (a) (b)		60,500		3,210,735
Littelfuse, Inc. (b)		1,600		424,400
Marvell Technology, Inc.		126,474		9,121,305
Microchip Technology, Inc.		71,300		5,724,677
MongoDB, Inc. (a)		8,660		2,341,231
Monolithic Power Systems, Inc.		3,611		3,338,369
NXP Semiconductors NV		5,400		1,296,054
Onestream, Inc. (a)		8,870		300,693
PTC, Inc. (a)		34,521		6,236,564
Pure Storage, Inc. Class A (a)		24,600		1,235,904
Roper Technologies, Inc.		1,250		695,550
Silicon Laboratories, Inc. (a) (b)		16,323		1,886,449

MML Mid Cap Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Tyler Technologies, Inc. (a)		5,800	$	3,385,576
Zoom Video Communications, Inc. Class A (a)		20,200		1,408,748
				68,403,886
Materials — 4.1%
Avery Dennison Corp.		15,700		3,465,932
Ball Corp.		64,947		4,410,551
Martin Marietta Materials, Inc.		6,260		3,369,445
RPM International, Inc.		9,700		1,173,700
Sealed Air Corp.		37,500		1,361,250
				13,780,878
Real Estate — 1.1%
CoStar Group, Inc. (a)		19,954		1,505,330
SBA Communications Corp.		9,484		2,282,799
				3,788,129

TOTAL COMMON STOCK (Cost $248,611,947)				324,206,619

PREFERRED STOCK — 0.2%
Consumer Discretionary — 0.0%
Nuro, Inc., Series D, (Acquired 10/29/21, Cost $159,220)
(a) (c) (d) (e)		7,638		31,239
Health Care — 0.0%
Caris Life Sciences, Inc., Series D, (Acquired 5/11/21, Cost $271,366)
(a) (c) (d) (e)		33,502		121,947
Industrials — 0.0%
Sila Nanotechnologies, Inc., Series F, (Acquired 1/07/21, Cost $407,982)
(a) (c) (d) (e)		9,885		193,289
Information Technology — 0.1%
Databricks, Inc., Series H, (Acquired 8/31/21, Cost $185,327)
(a) (c) (d) (e)		2,522		220,347
Materials — 0.1%
Redwood Materials, Inc., Series C, (Acquired 5/28/21, Cost $200,090)
(a) (c) (d) (e)		4,221		217,466

TOTAL PREFERRED STOCK (Cost $1,223,984)				784,288

TOTAL EQUITIES (Cost $249,835,931)				324,990,907

TOTAL LONG-TERM INVESTMENTS (Cost $249,835,931)				324,990,907


SHORT-TERM INVESTMENTS — 3.8%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (f)		245,146		245,146
Mutual Fund — 0.0%
T. Rowe Price Treasury Reserve Fund		112		112

MML Mid Cap Growth Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Repurchase Agreement — 3.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (g)	$	12,434,095	$	12,434,095

TOTAL SHORT-TERM INVESTMENTS (Cost $12,679,353)				12,679,353

TOTAL INVESTMENTS — 100.3% (Cost $262,515,284) (h)				337,670,260

Other Assets/(Liabilities) — (0.3)%				(944,673)

NET ASSETS — 100.0%			$	336,725,587

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 September 30, 2024, was $28,717,812 or 8.53% of net assets. The Fund received $29,026,879 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)	Restricted security. Certain securities are restricted to resale. At September 30, 2024, these securities amounted to a value of $784,288 or 0.23% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

(d)	Investment is valued using significant unobservable inputs.

(e)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2024, these securities amounted to a value of $784,288 or 0.23% of net assets.

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

(g)	Maturity value of $12,434,620. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity dates ranging from 4/30/26 - 5/31/26, and an aggregate market value, including accrued interest, of $12,683,149.

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

MML Mid Cap Value Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.2%

COMMON STOCK — 98.5%
Communication Services — 2.6%
BCE, Inc. (a)		57,301	$	1,992,157
Fox Corp. Class B		19,468		755,358
Interpublic Group of Cos., Inc.		110,731		3,502,422
Omnicom Group, Inc.		5,991		619,410
				6,869,347
Consumer Discretionary — 2.2%
Aptiv PLC (b)		17,196		1,238,284
BorgWarner, Inc.		43,282		1,570,704
Darden Restaurants, Inc.		9,200		1,509,996
Mohawk Industries, Inc. (b)		9,206		1,479,220
				5,798,204
Consumer Staples — 10.6%
Conagra Brands, Inc.		176,802		5,749,601
Dollar Tree, Inc. (b)		29,712		2,089,348
General Mills, Inc.		43,259		3,194,677
Heineken NV (a)		23,969		2,125,257
Kenvue, Inc.		128,237		2,966,122
Kimberly-Clark Corp.		25,346		3,606,229
Koninklijke Ahold Delhaize NV		128,626		4,444,278
Pernod Ricard SA		17,685		2,673,085
Reckitt Benckiser Group PLC		25,694		1,573,444
				28,422,041
Energy — 5.6%
Baker Hughes Co.		89,287		3,227,725
Coterra Energy, Inc.		78,309		1,875,500
Enterprise Products Partners LP (c)		181,628		5,287,191
EQT Corp.		62,898		2,304,583
Occidental Petroleum Corp.		48,091		2,478,610
				15,173,609
Financials — 16.0%
Aflac, Inc.		7,770		868,686
AllianceBernstein Holding LP (c)		29,270		1,021,230
Allstate Corp.		25,739		4,881,401
Bank of New York Mellon Corp.		68,106		4,894,097
Commerce Bancshares, Inc.		33,354		1,981,228
Edenred SE		35,986		1,365,118
First Hawaiian, Inc.		58,158		1,346,358
Hanover Insurance Group, Inc.		17,145		2,539,346
Northern Trust Corp.		61,795		5,563,404
PNC Financial Services Group, Inc.		6,758		1,249,216

MML Mid Cap Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Reinsurance Group of America, Inc.		6,163	$	1,342,733
T. Rowe Price Group, Inc.		27,560		3,002,111
Truist Financial Corp.		80,947		3,462,103
US Bancorp		79,805		3,649,483
Westamerica BanCorp		28,060		1,386,725
Willis Towers Watson PLC		14,714		4,333,714
				42,886,953
Health Care — 16.2%
Becton Dickinson & Co.		14,526		3,502,219
Cardinal Health, Inc.		30,804		3,404,458
Cencora, Inc.		2,948		663,536
Centene Corp. (b)		31,950		2,405,196
DENTSPLY SIRONA, Inc.		60,327		1,632,449
Envista Holdings Corp. (b)		89,250		1,763,580
GE HealthCare Technologies, Inc. (b)		29,172		2,737,792
Henry Schein, Inc. (b)		76,350		5,565,915
Hologic, Inc. (b)		23,552		1,918,546
Labcorp Holdings, Inc.		14,832		3,314,655
Medtronic PLC		24,609		2,215,548
Quest Diagnostics, Inc.		28,010		4,348,552
Universal Health Services, Inc. Class B		8,883		2,034,296
Zimmer Biomet Holdings, Inc.		74,349		8,025,975
				43,532,717
Industrials — 15.0%
Atkore, Inc.		5,793		490,899
Beacon Roofing Supply, Inc. (b)		35,315		3,052,275
Bunzl PLC		45,062		2,131,892
CSX Corp.		53,207		1,837,238
Cummins, Inc.		4,199		1,359,594
Dover Corp.		3,570		684,512
Emerson Electric Co.		44,778		4,897,370
Huntington Ingalls Industries, Inc.		7,434		1,965,401
Johnson Controls International PLC		17,079		1,325,501
L3Harris Technologies, Inc.		8,012		1,905,814
MSC Industrial Direct Co., Inc. Class A		41,362		3,559,614
Norfolk Southern Corp.		15,642		3,887,037
Oshkosh Corp.		29,840		2,990,266
Republic Services, Inc.		5,131		1,030,510
Southwest Airlines Co. (a)		108,173		3,205,166
Timken Co.		16,470		1,388,256
Vinci SA		27,133		3,174,562
Weir Group PLC		49,210		1,426,102
				40,312,009
Information Technology — 5.9%
Amdocs Ltd.		39,730		3,475,580
Cognizant Technology Solutions Corp. Class A		21,508		1,659,987
F5, Inc. (b)		12,811		2,820,982
HP, Inc.		90,660		3,251,974
Juniper Networks, Inc.		26,571		1,035,738
ON Semiconductor Corp. (b)		17,501		1,270,748
TE Connectivity PLC (b)		14,546		2,196,301
				15,711,310

MML Mid Cap Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Materials — 3.0%
Akzo Nobel NV		35,047	$	2,471,991
Graphic Packaging Holding Co.		97,106		2,873,367
Packaging Corp. of America		12,858		2,769,613
				8,114,971
Real Estate — 9.1%
Agree Realty Corp.		32,996		2,485,589
Equity Residential		47,418		3,530,744
Essex Property Trust, Inc.		5,513		1,628,650
Healthpeak Properties, Inc.		88,873		2,032,525
Public Storage		7,817		2,844,372
Realty Income Corp.		70,218		4,453,226
Regency Centers Corp.		34,787		2,512,665
Ventas, Inc.		39,412		2,527,492
VICI Properties, Inc.		69,198		2,304,985
				24,320,248
Utilities — 12.3%
CMS Energy Corp.		4,519		319,177
Duke Energy Corp.		21,934		2,528,990
Edison International		52,597		4,580,673
Evergy, Inc.		57,762		3,581,822
Eversource Energy		57,807		3,933,766
Northwestern Energy Group, Inc.		84,255		4,821,071
ONE Gas, Inc.		36,859		2,743,047
Spire, Inc.		40,250		2,708,422
WEC Energy Group, Inc.		38,149		3,669,171
Xcel Energy, Inc.		60,779		3,968,869
				32,855,008

TOTAL COMMON STOCK (Cost $249,749,093)				263,996,417

PREFERRED STOCK — 0.7%
Consumer Staples — 0.7%
Henkel AG & Co. KGaA 2.197%
		20,708		1,945,775

TOTAL PREFERRED STOCK (Cost $1,420,336)				1,945,775

TOTAL EQUITIES (Cost $251,169,429)				265,942,192

TOTAL LONG-TERM INVESTMENTS (Cost $251,169,429)				265,942,192


SHORT-TERM INVESTMENTS — 1.7%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (d)		48,575		48,575

MML Mid Cap Value Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Repurchase Agreement — 1.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (e)	$	4,428,275	$	4,428,275

TOTAL SHORT-TERM INVESTMENTS (Cost $4,476,850)				4,476,850

TOTAL INVESTMENTS — 100.9% (Cost $255,646,279) (f)				270,419,042

Other Assets/(Liabilities) — (0.9)%				(2,531,079)

NET ASSETS — 100.0%			$	267,887,963

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 September 30, 2024, was $6,954,837 or 2.60% of net assets. The Fund received $7,236,523 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)	Non-income producing security.

(c)	Security is a Master Limited Partnership.

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

(e)	Maturity value of $4,428,461. Collateralized by U.S. Government Agency obligations with a rate of 0.750%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $4,516,840.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	12/20/24	GBP	87,880	USD	117,659		(189)
Bank of America N.A.	12/20/24	USD	2,282,758	GBP	1,713,139		(7,216)
Bank of America N.A.	12/20/24	USD	1,750,430	CAD	2,358,039		3,343
Citibank N.A.	12/20/24	USD	3,873,822	EUR	3,469,054		(137)
Goldman Sachs & Co.	12/20/24	USD	2,283,443	GBP	1,713,139		(6,530)
Goldman Sachs & Co.	12/20/24	USD	3,871,048	EUR	3,469,054		(2,910)
JP Morgan Chase Bank N.A.	12/20/24	USD	3,873,528	EUR	3,469,054		(430)
UBS AG	12/20/24	USD	4,261,849	EUR	3,819,432		(3,383)
						$	(17,452)

Currency Legend

CAD	Canadian Dollar

EUR

Euro

GBP	British Pound

USD	U.S. Dollar

MML Small Cap Growth Equity Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.4%

COMMON STOCK — 99.4%
Communication Services — 3.3%
Cargurus, Inc. (a)		54,546	$	1,638,016
Cinemark Holdings, Inc. (a)		35,814		997,062
Criteo SA Sponsored ADR (a)		21,232		854,375
New York Times Co. Class A		19,322		1,075,656
Ziff Davis, Inc. (a) (b)		10,400		506,064
				5,071,173
Consumer Discretionary — 11.3%
Abercrombie & Fitch Co. Class A (a)		4,632		648,017
Acushnet Holdings Corp. (b)		8,549		544,999
American Eagle Outfitters, Inc.		38,576		863,717
Boot Barn Holdings, Inc. (a)		9,860		1,649,381
Carter's, Inc.		8,614		559,738
Century Communities, Inc.		6,449		664,118
Champion Homes, Inc. (a)		25,845		2,451,398
Crocs, Inc. (a)		4,863		704,211
Dutch Bros, Inc. Class A (a)		12,463		399,190
European Wax Center, Inc. Class A (a) (b)		7,532		51,217
Genius Sports Ltd. (a) (b)		107,849		845,536
Global-e Online Ltd. (a) (b)		16,642		639,718
Goodyear Tire & Rubber Co. (a)		61,332		542,788
H&R Block, Inc.		18,176		1,155,085
Modine Manufacturing Co. (a)		6,220		825,954
Patrick Industries, Inc. (b)		5,396		768,228
Shake Shack, Inc. Class A (a)		7,793		804,315
Steven Madden Ltd. (b)		16,102		788,837
Stride, Inc. (a)		6,477		552,553
Visteon Corp. (a)		4,961		472,486
Wingstop, Inc.		2,383		991,519
YETI Holdings, Inc. (a)		14,559		597,356
				17,520,361
Consumer Staples — 2.2%
BellRing Brands, Inc. (a)		19,521		1,185,315
elf Beauty, Inc. (a) (b)		4,727		515,385
Freshpet, Inc. (a)		6,657		910,478
Simply Good Foods Co. (a)		21,338		741,922
				3,353,100
Energy — 4.8%
Cactus, Inc. Class A		20,827		1,242,747
Gulfport Energy Corp. (a)		6,414		970,759
Magnolia Oil & Gas Corp. Class A		29,522		720,927
Seadrill Ltd. (a)		29,585		1,175,708

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

	Number of Shares		Value
Sitio Royalties Corp. Class A (b)		32,197	$	670,986
Viper Energy, Inc.		59,666		2,691,533
				7,472,660
Financials — 11.1%
Ameris Bancorp		18,224		1,136,995
Assured Guaranty Ltd.		11,127		884,819
Banner Corp.		16,235		966,957
Cadence Bank		58,363		1,858,862
HA Sustainable Infrastructure Capital, Inc. (b)		57,883		1,995,227
Hamilton Lane, Inc. Class A (b)		3,912		658,742
Hancock Whitney Corp.		19,649		1,005,439
Kemper Corp.		10,078		617,277
MGIC Investment Corp.		29,153		746,317
National Bank Holdings Corp. Class A (b)		25,131		1,058,015
PJT Partners, Inc. Class A (b)		14,603		1,947,164
PRA Group, Inc. (a)		35,566		795,256
Seacoast Banking Corp. of Florida		35,138		936,428
SiriusPoint Ltd. (a)		63,583		911,780
StepStone Group, Inc. Class A		12,773		725,890
UMB Financial Corp.		9,213		968,378
				17,213,546
Health Care — 20.8%
Acadia Healthcare Co., Inc. (a) (b)		21,478		1,361,920
Akero Therapeutics, Inc. (a)		24,947		715,729
Alignment Healthcare, Inc. (a)		39,681		469,029
Apellis Pharmaceuticals, Inc. (a)		12,748		367,652
Apogee Therapeutics, Inc. (a)		12,253		719,741
Avidity Biosciences, Inc. (a)		19,833		910,930
Axsome Therapeutics, Inc. (a)		4,395		394,979
Blueprint Medicines Corp. (a)		6,756		624,930
Celldex Therapeutics, Inc. (a)		15,536		528,069
Crinetics Pharmaceuticals, Inc. (a)		22,213		1,135,084
Cytokinetics, Inc. (a)		15,046		794,429
Disc Medicine, Inc. (a) (b)		13,714		673,906
Evolent Health, Inc. Class A (a) (b)		27,040		764,691
Geron Corp. (a)		83,521		379,185
Glaukos Corp. (a)		9,153		1,192,453
Globus Medical, Inc. Class A (a)		11,010		787,655
Haemonetics Corp. (a) (b)		22,601		1,816,668
HealthEquity, Inc. (a)		9,436		772,337
Hims & Hers Health, Inc. (a)		40,949		754,280
Immatics NV (a)		48,279		550,863
Immunocore Holdings PLC ADR (a)		4,891		152,257
Insmed, Inc. (a)		8,854		646,342
Inspire Medical Systems, Inc. (a) (b)		4,080		861,084
Intellia Therapeutics, Inc. (a)		6,978		143,398
Intra-Cellular Therapies, Inc. (a)		8,404		614,921
Kymera Therapeutics, Inc. (a)		13,811		653,675
Longboard Pharmaceuticals, Inc. (a)		9,971		332,333
Merus NV (a)		15,610		779,876
Myriad Genetics, Inc. (a)		27,473		752,485
Nurix Therapeutics, Inc. (a)		32,113		721,579
Nuvalent, Inc., Class A (a)		2,250		230,175
PROCEPT BioRobotics Corp. (a)		31,515		2,524,982
Prothena Corp. PLC (a) (b)		4,575		76,540

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

	Number of Shares		Value
PTC Therapeutics, Inc. (a)		8,468	$	314,163
REVOLUTION Medicines, Inc. (a)		22,977		1,042,007
Rocket Pharmaceuticals, Inc. (a) (b)		29,776		549,963
Savara, Inc. (a)		58,295		247,171
Spyre Therapeutics, Inc. (a) (b)		11,042		324,745
Structure Therapeutics, Inc. ADR (a) (b)		11,811		518,385
Surgery Partners, Inc. (a)		23,324		751,966
Syndax Pharmaceuticals, Inc. (a)		18,604		358,127
TransMedics Group, Inc. (a)		4,747		745,279
Twist Bioscience Corp. (a)		9,211		416,153
Ultragenyx Pharmaceutical, Inc. (a)		6,757		375,351
Vaxcyte, Inc. (a)		10,147		1,159,498
Veracyte, Inc. (a)		11,640		396,226
Verona Pharma PLC ADR (a) (b)		13,511		388,711
Xenon Pharmaceuticals, Inc. (a)		8,621		339,409
				32,131,331
Industrials — 24.1%
Acuity Brands, Inc.		2,854		785,963
Air Lease Corp.		19,177		868,526
Ameresco, Inc. Class A (a) (b)		28,859		1,094,910
Applied Industrial Technologies, Inc.		10,331		2,305,156
Aris Water Solutions, Inc. Class A		19,388		327,076
Atmus Filtration Technologies, Inc.		22,517		845,063
AZEK Co., Inc. (a)		57,307		2,681,968
Boise Cascade Co.		6,964		981,785
Casella Waste Systems, Inc. Class A (a)		12,562		1,249,793
Comfort Systems USA, Inc.		2,457		959,090
Curtiss-Wright Corp.		5,285		1,737,127
Enpro, Inc.		5,800		940,644
ESCO Technologies, Inc.		2,600		335,348
Exlservice Holdings, Inc. (a)		40,635		1,550,225
Flowserve Corp.		20,590		1,064,297
Fluor Corp. (a)		69,530		3,317,276
GATX Corp.		5,838		773,243
Hayward Holdings, Inc. (a)		3,600		55,224
Helios Technologies, Inc.		8,939		426,390
Kennametal, Inc. (b)		20,928		542,663
Kirby Corp. (a)		10,269		1,257,234
Leonardo DRS, Inc. (a)		26,963		760,896
ManpowerGroup, Inc.		8,319		611,613
McGrath RentCorp		6,634		698,428
Middleby Corp. (a)		4,441		617,876
NEXTracker, Inc. Class A (a)		12,315		461,566
Rush Enterprises, Inc. Class A		40,582		2,143,947
RXO, Inc. (a) (b)		27,255		763,140
Ryder System, Inc.		6,888		1,004,270
Shoals Technologies Group, Inc. Class A (a)		102,978		577,707
TriNet Group, Inc.		6,712		650,863
Verra Mobility Corp. (a)		103,499		2,878,307
Zurn Elkay Water Solutions Corp. (b)		54,830		1,970,590
				37,238,204
Information Technology — 11.8%
AvePoint, Inc. (a)		80,397		946,273
Belden, Inc.		8,782		1,028,636
Calix, Inc. (a)		8,419		326,573

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

	Number of Shares		Value
Cirrus Logic, Inc. (a)		5,977	$	742,403
Clearwater Analytics Holdings, Inc. Class A (a)		38,007		959,677
Crane NXT Co. (b)		14,177		795,330
Credo Technology Group Holding Ltd. (a)		17,186		529,329
CyberArk Software Ltd. (a)		4,603		1,342,281
DoubleVerify Holdings, Inc. (a)		15,287		257,433
ePlus, Inc. (a)		5,924		582,566
Fabrinet (a)		2,037		481,628
FormFactor, Inc. (a)		13,355		614,330
Intapp, Inc. (a)		10,607		507,333
Jamf Holding Corp. (a) (b)		81,779		1,418,866
Manhattan Associates, Inc. (a)		3,206		902,104
MKS Instruments, Inc.		5,346		581,164
Novanta, Inc. (a)		5,713		1,022,170
Power Integrations, Inc.		9,887		633,954
Rambus, Inc. (a)		449		18,957
SentinelOne, Inc. Class A (a)		8,200		196,144
SiTime Corp. (a) (b)		4,126		707,650
Sprout Social, Inc. Class A (a) (b)		31,423		913,467
Squarespace, Inc. Class A (a)		21,163		982,598
Synaptics, Inc. (a)		6,743		523,122
Universal Display Corp.		2,095		439,740
Viavi Solutions, Inc. (a)		84,078		758,383
				18,212,111
Materials — 3.2%
Cabot Corp.		28,659		3,203,216
Graphic Packaging Holding Co. (b)		33,216		982,862
Methanex Corp.		19,176		792,736
				4,978,814
Real Estate — 5.6%
Acadia Realty Trust		18,400		432,032
American Healthcare REIT, Inc.		58,601		1,529,486
Douglas Emmett, Inc. (b)		43,602		766,087
Essential Properties Realty Trust, Inc.		26,375		900,706
Independence Realty Trust, Inc. (b)		38,188		782,854
Phillips Edison & Co., Inc.		46,275		1,745,030
Ryman Hospitality Properties, Inc.		11,239		1,205,271
Terreno Realty Corp.		12,502		835,509
Xenia Hotels & Resorts, Inc.		31,974		472,256
				8,669,231
Utilities — 1.2%
IDACORP, Inc.		9,081		936,160
ONE Gas, Inc. (b)		12,198		907,775
				1,843,935

TOTAL COMMON STOCK (Cost $119,380,482)				153,704,466

TOTAL EQUITIES (Cost $119,380,482)				153,704,466

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

	Number of Shares		Value
EXCHANGE-TRADED FUNDS — 0.2%

iShares Russell 2000 ETF
(b)		656	$	144,904
iShares Russell 2000 Growth ETF
(b)		614		174,376

TOTAL EXCHANGE-TRADED FUNDS (Cost $301,737)				319,280

TOTAL LONG-TERM INVESTMENTS (Cost $119,682,219)				154,023,746


SHORT-TERM INVESTMENTS — 1.6%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		175,878		175,878

	Principal Amount
Repurchase Agreement — 1.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (d)	$	2,371,004		2,371,004

TOTAL SHORT-TERM INVESTMENTS (Cost $2,546,882)				2,546,882

TOTAL INVESTMENTS — 101.2% (Cost $122,229,101) (e)				156,570,628

Other Assets/(Liabilities) — (1.2)%				(1,870,909)

NET ASSETS — 100.0%			$	154,699,719

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 September 30, 2024, was $25,058,959 or 16.20% of net assets. The Fund received $25,397,688 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 $2,371,104. Collateralized by U.S. Government Agency obligations with rates ranging from 0.750% - 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $2,418,607.

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

MML Small Company Value Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.3%

COMMON STOCK — 99.3%
Communication Services — 1.4%
Cable One, Inc. (a)		1,914	$	669,498
Entravision Communications Corp. Class A		106,937		221,360
Townsquare Media, Inc. Class A		5,927		60,218
				951,076
Consumer Discretionary — 12.9%
A-Mark Precious Metals, Inc. (a)		11,195		494,371
Accel Entertainment, Inc. (b)		29,130		338,491
Boyd Gaming Corp.		10,727		693,500
BRP, Inc.		8,274		492,634
Brunswick Corp.		10,608		889,162
Capri Holdings Ltd. (b)		8,435		357,981
Cavco Industries, Inc. (b)		415		177,720
Champion Homes, Inc. (b)		7,075		671,064
Dave & Buster's Entertainment, Inc. (a) (b)		14,578		496,381
M/I Homes, Inc. (b)		883		151,311
MarineMax, Inc. (b)		18,655		657,962
Meritage Home Corp.		2,194		449,924
OneWater Marine, Inc. Class A (a) (b)		15,719		375,841
Penske Automotive Group, Inc.		1,961		318,506
Solo Brands, Inc. Class A (a) (b)		52,978		74,699
Tapestry, Inc.		22,813		1,071,755
Taylor Morrison Home Corp. (b)		4,996		351,019
Topgolf Callaway Brands Corp. (b)		29,358		322,351
Visteon Corp. (b)		4,681		445,818
				8,830,490
Consumer Staples — 3.6%
Edgewell Personal Care Co.		29,411		1,068,796
Spectrum Brands Holdings, Inc.		11,434		1,087,831
Turning Point Brands, Inc.		6,495		280,259
				2,436,886
Energy — 11.6%
Cactus, Inc. Class A (a)		14,758		880,610
ChampionX Corp.		49,776		1,500,746
Chord Energy Corp.		6,562		854,569
Crescent Energy Co. Class A		74,294		813,519
Mach Natural Resources LP		20,757		332,112
Magnolia Oil & Gas Corp. Class A (a)		56,413		1,377,606
Northern Oil & Gas, Inc.		35,130		1,243,953
Permian Resources Corp. (a)		50,187		683,045

MML Small Company Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
TXO Partners LP		10,011	$	198,018
				7,884,178
Financials — 32.7%
Ameris Bancorp		10,417		649,917
Axis Capital Holdings Ltd.		20,094		1,599,683
Axos Financial, Inc. (b)		4,898		307,986
Banc of California, Inc.		25,380		373,847
BankUnited, Inc.		5,218		190,144
Bowhead Specialty Holdings, Inc. (a) (b)		4,546		127,334
Columbia Banking System, Inc. (a)		45,621		1,191,164
Compass Diversified Holdings (a)		51,237		1,133,875
CVB Financial Corp.		49,739		886,349
Euronet Worldwide, Inc. (b)		10,179		1,010,062
EVERTEC, Inc.		41,868		1,418,907
Fidelis Insurance Holdings Ltd.		19,577		353,561
First BanCorp		31,132		659,064
First Interstate BancSystem, Inc. Class A		21,430		657,472
First Merchants Corp.		8,501		316,237
FNB Corp.		108,588		1,532,177
Hamilton Insurance Group Ltd. Class B (b)		20,643		399,236
Home BancShares, Inc.		45,275		1,226,500
Old National Bancorp		98,430		1,836,704
Pacific Premier Bancorp, Inc.		31,584		794,653
Popular, Inc.		8,195		821,713
Provident Financial Services, Inc.		9,388		174,241
Repay Holdings Corp. (b)		37,004		301,953
SouthState Corp.		16,013		1,556,143
StoneX Group, Inc. (b)		2,460		201,425
UMB Financial Corp.		10,785		1,133,611
Valley National Bancorp		15,298		138,600
Webster Financial Corp.		28,546		1,330,529
				22,323,087
Health Care — 3.5%
AMN Healthcare Services, Inc. (a) (b)		3,109		131,791
Embecta Corp.		28,279		398,734
Enovis Corp. (b)		22,101		951,448
Envista Holdings Corp. (a) (b)		36,525		721,734
Patterson Cos., Inc. (a)		7,729		168,801
				2,372,508
Industrials — 17.1%
Atmus Filtration Technologies, Inc.		13,610		510,783
Barrett Business Services, Inc.		1,718		64,442
Beacon Roofing Supply, Inc. (b)		11,998		1,036,987
Brink's Co.		13,568		1,569,004
Deluxe Corp.		15,858		309,072
DIRTT Environmental Solutions (a) (b)		80,290		41,871
DXP Enterprises, Inc. (b)		6,257		333,874
First Advantage Corp. (b)		7,053		140,002
Gates Industrial Corp. PLC (b)		55,145		967,795
GMS, Inc. (b)		14,334		1,298,230
Hillman Solutions Corp. (b)		43,246		456,678
IBEX Holdings Ltd. (b)		10,138		202,557
Korn Ferry		6,795		511,256

MML Small Company Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Loomis AB		12,810	$	421,093
Luxfer Holdings PLC		6,354		82,284
NV5 Global, Inc. (b)		4,866		454,874
Proficient Auto Logistics, Inc. (b)		11,976		169,820
Science Applications International Corp.		4,459		621,005
Sensata Technologies Holding PLC		9,499		340,634
Tecnoglass, Inc. (a)		6,279		431,116
Timken Co. (a)		18,421		1,552,706
Titan Machinery, Inc. (a) (b)		11,050		153,926
				11,670,009
Information Technology — 6.5%
Amkor Technology, Inc.		12,614		385,988
Avnet, Inc.		18,101		983,065
Axcelis Technologies, Inc. (b)		7,223		757,332
Coherent Corp. (b)		9,332		829,708
Kulicke & Soffa Industries, Inc. (a)		18,302		825,969
Teradata Corp. (b)		21,237		644,331
				4,426,393
Materials — 4.0%
Graphic Packaging Holding Co. (a)		53,441		1,581,319
Ingevity Corp. (b)		9,418		367,302
Minerals Technologies, Inc.		5,477		422,989
Pactiv Evergreen, Inc. (a)		29,415		338,567
				2,710,177
Real Estate — 5.4%
American Healthcare REIT, Inc.		8,948		233,543
Americold Realty Trust, Inc.		17,701		500,407
CareTrust REIT, Inc.		4,223		130,322
EPR Properties		6,980		342,299
Ryman Hospitality Properties, Inc.		9,325		1,000,013
Terreno Realty Corp.		15,915		1,063,599
UMH Properties, Inc.		21,488		422,669
				3,692,852
Utilities — 0.6%
Southwest Gas Holdings, Inc.		5,518		407,008

TOTAL COMMON STOCK (Cost $63,291,692)				67,704,664

TOTAL EQUITIES (Cost $63,291,692)				67,704,664

TOTAL LONG-TERM INVESTMENTS (Cost $63,291,692)				67,704,664


SHORT-TERM INVESTMENTS — 1.4%
Investment of Cash Collateral from Securities Loaned — 0.5%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		359,706		359,706

MML Small Company Value Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (d)	$	567,272	$	567,272

TOTAL SHORT-TERM INVESTMENTS (Cost $926,978)				926,978

TOTAL INVESTMENTS — 100.7% (Cost $64,218,670) (e)				68,631,642

Other Assets/(Liabilities) — (0.7)%				(452,544)

NET ASSETS — 100.0%			$	68,179,098

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 September 30, 2024, was $10,109,776 or 14.83% of net assets. The Fund received $9,921,029 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)	Non-income producing security.

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

(d)	Maturity value of $567,296. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $578,752.

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

Forward contracts

Counterparty

Settlement Date

Currency Purchased

Currency Sold

Unrealized Appreciation (Depreciation)

Citibank N.A.

12/20/24

USD

362,071

SEK

3,686,846

(2,375)

Currency Legend

SEK	Swedish Krona

USD	U.S. Dollar

MML Small/Mid Cap Value Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.4%

COMMON STOCK — 100.4%
Communication Services — 1.8%
Criteo SA Sponsored ADR (a)		25,081	$	1,009,260
Nexstar Media Group, Inc.		8,324		1,376,373
				2,385,633
Consumer Discretionary — 16.2%
Adient PLC (a)		65,060		1,468,404
ADT, Inc.		231,451		1,673,391
AutoNation, Inc. (a)		8,290		1,483,247
Bath & Body Works, Inc.		47,228		1,507,518
BorgWarner, Inc.		54,296		1,970,402
Brunswick Corp.		19,621		1,644,632
Crocs, Inc. (a)		10,288		1,489,805
Dick's Sporting Goods, Inc.		4,464		931,637
Dine Brands Global, Inc.		20,281		633,376
Group 1 Automotive, Inc.		4,361		1,670,437
PulteGroup, Inc.		8,407		1,206,657
PVH Corp.		13,128		1,323,696
Tapestry, Inc.		34,874		1,638,380
Taylor Morrison Home Corp. (a)		24,074		1,691,439
Viking Holdings Ltd. (a)		43,330		1,511,784
				21,844,805
Consumer Staples — 2.0%
Lamb Weston Holdings, Inc.		13,219		855,798
Nomad Foods Ltd.		94,488		1,800,941
				2,656,739
Energy — 5.1%
Cameco Corp.		42,494		2,029,514
HF Sinclair Corp.		16,906		753,500
Magnolia Oil & Gas Corp. Class A		65,310		1,594,870
Matador Resources Co.		22,470		1,110,467
Northern Oil & Gas, Inc.		40,710		1,441,541
				6,929,892
Financials — 20.1%
American Financial Group, Inc.		14,354		1,932,048
BankUnited, Inc.		41,407		1,508,871
Cboe Global Markets, Inc.		7,014		1,436,958
Comerica, Inc.		30,364		1,819,107
Federated Hermes, Inc.		46,710		1,717,527
First BanCorp		74,902		1,585,675
First Citizens BancShares, Inc. Class A		1,033		1,901,701
First Hawaiian, Inc.		70,650		1,635,548

MML Small/Mid Cap Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Hanover Insurance Group, Inc.		10,559	$	1,563,893
Kemper Corp.		13,404		820,995
NCR Atleos Corp. (a)		55,224		1,575,541
Stifel Financial Corp.		17,677		1,659,870
Texas Capital Bancshares, Inc. (a)		20,824		1,488,083
Walker & Dunlop, Inc.		15,042		1,708,621
Webster Financial Corp.		30,555		1,424,169
Wintrust Financial Corp.		15,558		1,688,510
Zions Bancorp NA		33,039		1,560,102
				27,027,219
Health Care — 7.1%
AMN Healthcare Services, Inc. (a)		18,153		769,506
Avantor, Inc. (a)		56,380		1,458,551
Encompass Health Corp.		20,554		1,986,338
Integra LifeSciences Holdings Corp. (a)		37,199		675,906
Pediatrix Medical Group, Inc. (a)		78,262		907,056
Revvity, Inc.		14,308		1,827,847
Teleflex, Inc.		7,780		1,924,150
				9,549,354
Industrials — 22.4%
ABM Industries, Inc.		30,816		1,625,852
ArcBest Corp.		16,918		1,834,757
Builders FirstSource, Inc. (a)		9,610		1,862,995
C.H. Robinson Worldwide, Inc.		19,567		2,159,610
Core & Main, Inc. Class A (a)		32,240		1,431,456
Fluor Corp. (a)		33,750		1,610,212
Gates Industrial Corp. PLC (a)		95,780		1,680,939
Herc Holdings, Inc.		9,710		1,548,065
John Bean Technologies Corp.		15,056		1,483,166
MasTec, Inc. (a)		14,953		1,840,714
Middleby Corp. (a)		12,751		1,774,047
MillerKnoll, Inc.		63,983		1,584,219
Oshkosh Corp.		14,515		1,454,548
Pentair PLC		21,040		2,057,502
Regal Rexnord Corp.		10,676		1,770,935
Robert Half, Inc.		24,129		1,626,536
WillScot Holdings Corp. (a)		45,636		1,715,914
WNS Holdings Ltd. (a)		21,659		1,141,646
				30,203,113
Information Technology — 12.4%
ACI Worldwide, Inc. (a)		30,901		1,572,861
Amkor Technology, Inc.		43,320		1,325,592
Avnet, Inc.		26,112		1,418,143
Belden, Inc.		11,264		1,319,352
Calix, Inc. (a)		29,537		1,145,740
CommVault Systems, Inc. (a)		7,396		1,137,875
F5, Inc. (a)		8,640		1,902,528
FormFactor, Inc. (a)		21,564		991,944
Gen Digital, Inc.		55,652		1,526,534
Lumentum Holdings, Inc. (a)		21,313		1,350,818
Synaptics, Inc. (a)		14,935		1,158,657

MML Small/Mid Cap Value Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
TD SYNNEX Corp.		15,017	$	1,803,242
				16,653,286
Materials — 3.4%
Avient Corp.		35,031		1,762,760
Berry Global Group, Inc.		19,024		1,293,252
Element Solutions, Inc.		56,427		1,532,557
				4,588,569
Real Estate — 7.7%
Broadstone Net Lease, Inc.		46,338		878,105
CubeSmart		22,605		1,216,827
First Industrial Realty Trust, Inc.		21,024		1,176,924
Independence Realty Trust, Inc.		90,750		1,860,375
Jones Lang LaSalle, Inc. (a)		8,533		2,302,289
Ryman Hospitality Properties, Inc.		12,563		1,347,256
STAG Industrial, Inc.		40,348		1,577,203
				10,358,979
Utilities — 2.2%
IDACORP, Inc.		15,457		1,593,462
Portland General Electric Co.		30,210		1,447,059
				3,040,521

TOTAL COMMON STOCK (Cost $122,174,424)				135,238,110

TOTAL EQUITIES (Cost $122,174,424)				135,238,110

TOTAL LONG-TERM INVESTMENTS (Cost $122,174,424)				135,238,110

	Principal Amount
SHORT-TERM INVESTMENTS — 0.4%

Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (b)	$	510,882		510,882

TOTAL SHORT-TERM INVESTMENTS (Cost $510,882)				510,882

TOTAL INVESTMENTS — 100.8% (Cost $122,685,306) (c)				135,748,992

Other Assets/(Liabilities) — (0.8)%				(1,060,111)

NET ASSETS — 100.0%			$	134,688,881

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)	Maturity value of $510,903. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $521,177.

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

MML Sustainable Equity Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.8%

COMMON STOCK — 99.8%
Communication Services — 7.9%
Alphabet, Inc. Class A		35,152	$	5,829,959
Liberty Media Corp-Liberty Formula One Class C (a)		2,906		225,012
Meta Platforms, Inc. Class A		6,476		3,707,121
Verizon Communications, Inc.		30,645		1,376,267
Walt Disney Co.		5,747		552,804
				11,691,163
Consumer Discretionary — 9.9%
Airbnb, Inc. Class A (a)		2,119		268,710
Amazon.com, Inc. (a)		26,333		4,906,628
Aptiv PLC (a)		9,685		697,417
CarMax, Inc. (a)		5,321		411,739
Chipotle Mexican Grill, Inc. (a)		10,517		605,989
Deckers Outdoor Corp. (a)		2,802		446,779
Home Depot, Inc.		6,137		2,486,712
LKQ Corp.		15,805		630,936
Tesla, Inc. (a)		5,400		1,412,802
TJX Cos., Inc.		12,824		1,507,333
Tractor Supply Co.		2,948		857,662
YETI Holdings, Inc. (a)		9,831		403,366
				14,636,073
Consumer Staples — 5.4%
Colgate-Palmolive Co.		4,352		451,781
Costco Wholesale Corp.		1,359		1,204,781
Mondelez International, Inc. Class A		14,907		1,098,199
PepsiCo, Inc.		9,677		1,645,574
Procter & Gamble Co.		7,030		1,217,596
Sysco Corp.		15,072		1,176,520
Target Corp.		7,597		1,184,068
				7,978,519
Energy — 3.0%
ConocoPhillips		15,182		1,598,361
EOG Resources, Inc.		12,081		1,485,117
Schlumberger NV		32,640		1,369,248
				4,452,726
Financials — 13.3%
American Express Co.		3,738		1,013,746
Ameriprise Financial, Inc.		1,996		937,741
Bank of America Corp.		32,806		1,301,742
BlackRock, Inc.		1,204		1,143,210
Block, Inc. (a)		6,585		442,051

MML Sustainable Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Intercontinental Exchange, Inc.		4,438	$	712,920
JP Morgan Chase & Co.		11,190		2,359,524
Marsh & McLennan Cos., Inc.		4,126		920,469
Mastercard, Inc. Class A		2,537		1,252,771
MetLife, Inc.		9,863		813,500
Morgan Stanley		17,911		1,867,043
Progressive Corp.		4,311		1,093,959
Prudential Financial, Inc.		6,119		741,011
Regions Financial Corp.		52,784		1,231,451
S&P Global, Inc.		3,299		1,704,329
Visa, Inc. Class A		8,034		2,208,948
				19,744,415
Health Care — 12.8%
AbbVie, Inc.		9,716		1,918,716
Agilent Technologies, Inc.		9,551		1,418,133
Amgen, Inc.		1,996		643,131
Bristol-Myers Squibb Co.		6,387		330,463
Cigna Group		3,773		1,307,118
Danaher Corp.		6,738		1,873,299
Dexcom, Inc. (a)		5,173		346,798
Eli Lilly & Co.		1,772		1,569,886
IDEXX Laboratories, Inc. (a)		803		405,692
Intuitive Surgical, Inc. (a)		1,993		979,101
Merck & Co., Inc.		10,861		1,233,375
Novo Nordisk AS Class B		7,499		892,930
Thermo Fisher Scientific, Inc.		2,084		1,289,100
UnitedHealth Group, Inc.		4,987		2,915,799
Vertex Pharmaceuticals, Inc. (a)		1,331		619,021
Zoetis, Inc.		6,516		1,273,096
				19,015,658
Industrials — 8.8%
Cummins, Inc.		3,601		1,165,968
Deere & Co.		1,465		611,388
Eaton Corp. PLC		4,204		1,393,374
FedEx Corp.		2,197		601,275
Ferguson Enterprises, Inc.		3,161		627,680
Honeywell International, Inc.		4,795		991,175
Johnson Controls International PLC		19,589		1,520,302
Lockheed Martin Corp.		952		556,501
Parker-Hannifin Corp.		1,778		1,123,376
Saia, Inc. (a)		544		237,869
Uber Technologies, Inc. (a)		12,131		911,766
Union Pacific Corp.		4,968		1,224,513
United Parcel Service, Inc. Class B		5,194		708,150
United Rentals, Inc.		551		446,161
Xylem, Inc.		6,363		859,196
				12,978,694
Information Technology — 32.5%
Accenture PLC Class A		3,225		1,139,973
Adobe, Inc. (a)		721		373,319
Advanced Micro Devices, Inc. (a)		11,422		1,874,122
Analog Devices, Inc.		6,435		1,481,144
Apple, Inc.		44,555		10,381,315

MML Sustainable Equity Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Applied Materials, Inc.		5,947	$	1,201,591
ASML Holding NV		974		811,974
Broadcom, Inc.		9,276		1,600,110
Cadence Design Systems, Inc. (a)		4,419		1,197,682
CDW Corp.		3,547		802,686
Cisco Systems, Inc.		12,845		683,611
Crowdstrike Holdings, Inc. Class A (a)		1,800		504,846
Dynatrace, Inc. (a)		4,741		253,501
International Business Machines Corp.		5,266		1,164,207
Microsoft Corp.		27,462		11,816,899
Motorola Solutions, Inc.		2,480		1,115,083
NVIDIA Corp.		80,536		9,780,292
Salesforce, Inc.		2,720		744,491
ServiceNow, Inc. (a)		507		453,456
Workday, Inc. Class A (a)		3,359		820,973
				48,201,275
Materials — 2.3%
Ball Corp.		10,703		726,841
Ecolab, Inc.		4,058		1,036,129
Linde PLC (LIN US)		3,396		1,619,416
				3,382,386
Real Estate — 2.2%
Equinix, Inc.		1,200		1,065,156
Prologis, Inc.		17,009		2,147,897
				3,213,053
Utilities — 1.7%
NextEra Energy, Inc.		30,546		2,582,053

TOTAL COMMON STOCK (Cost $97,489,880)				147,876,015

TOTAL EQUITIES (Cost $97,489,880)				147,876,015


EXCHANGE-TRADED FUNDS — 0.1%
iShares Core S&P 500 ETF		344		198,426
TOTAL EXCHANGE-TRADED FUNDS (Cost $196,800)				198,426

TOTAL LONG-TERM INVESTMENTS (Cost $97,686,680)				148,074,441

	Principal Amount
SHORT-TERM INVESTMENTS — 0.2%

Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (b)	$	327,630		327,630

TOTAL SHORT-TERM INVESTMENTS (Cost $327,630)				327,630

MML Sustainable Equity Fund — Portfolio of Investments (Continued)

	Principal Amount	Value
TOTAL INVESTMENTS — 100.1% (Cost $98,014,310) (c)		$	148,402,071

Other Assets/(Liabilities) — (0.1)%			(132,178)

NET ASSETS — 100.0%		$	148,269,893

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.

(b)	Maturity value of $327,644. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 5/31/26, and an aggregate market value, including accrued interest, of $334,255.

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Citibank N.A.	12/20/24	USD	119,899	EUR	107,371	$	(4)
Goldman Sachs & Co.	12/20/24	USD	268,299	EUR	239,982		306
JP Morgan Chase Bank N.A.	12/20/24	USD	194,904	EUR	174,315		243
Morgan Stanley & Co. LLC	12/20/24	DKK	888,448	USD	$133,356		(143)
Morgan Stanley & Co. LLC	12/20/24	USD	896,072	DKK	5,965,458		1,619
UBS AG	12/20/24	USD	119,790	EUR	107,371		(113)
						$	1,908

Currency Legend

DKK	Danish Krone

EUR

Euro

USD	U.S. Dollar

MML Total Return Bond Fund — Portfolio of Investments

September 30, 2024 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 113.5%

BANK LOANS — 1.4%
Aerospace & Defense — 0.0%
TransDigm, Inc., 2024 Term Loan I, 3 mo. USD Term SOFR + 2.750%
7.354% VRN 8/24/28	$	65,552	$	65,509
Beverages — 0.1%
City Brewing Co. LLC
2024 First Lien First Out Roll Up Term Loan, 3 mo. USD Term SOFR + 3.500%
9.063% VRN 4/05/28		32,684		26,474
2024 First Lien Second Out PIK TL, 3 mo. USD Term SOFR + 3.500%
10.563% VRN 4/05/28		64,409		32,849
Naked Juice LLC
Term Loan, 3 mo. USD Term SOFR + 3.250%
7.954% VRN 1/24/29		138,891		113,326
2nd Lien Term Loan, 3 mo. USD Term SOFR + 6.000%
10.704% VRN 1/24/30		28,134		17,066
Triton Water Holdings, Inc., Term Loan, 3 mo. USD Term SOFR + 3.250%
8.115% VRN 3/31/28		26,401		26,345
				216,060
Chemicals — 0.0%
Chemours Co., 2023 USD Term Loan B, 1 mo. USD Term SOFR + 3.500%
8.345% VRN 8/18/28		65,778		65,716
Mativ Holdings, Inc., Delayed Draw Term Loan A, 1 mo. USD Term SOFR + 2.500%
7.445% VRN 5/06/27 (a)		17,744		17,522
				83,238
Commercial Services — 0.0%
Boost Newco Borrower LLC, 2024 USD Term Loan B, 3 mo. USD Term SOFR + 2.500%
7.104% VRN 1/31/31		16,731		16,724
Pre-Paid Legal Services, Inc., 2021 Term Loan, 1 mo. USD Term SOFR + 3.750%
8.710% VRN 12/15/28		27,933		27,891
Spin Holdco, Inc., 2021 Term Loan, 3 mo. USD Term SOFR + 4.000%
9.256% VRN 3/04/28		41,190		35,904
Trans Union LLC
2024 Term Loan B8, 1 mo. USD Term SOFR + 1.750%
6.595% VRN 6/24/31		13,879		13,847
2024 Term Loan B7, 1 mo. USD Term SOFR + 2.000%
6.845% VRN 12/01/28		31,926		31,891
TruGreen Ltd. Partnership, 2020 Term Loan, 1 mo. USD Term SOFR + 4.000%
8.955% VRN 11/02/27		23,789		22,957
				149,214

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Computers — 0.0%
Indy US Bidco LLC, 2024 USD Term Loan B, 1 mo. USD Term SOFR + 4.750%
9.595% VRN 3/06/28	$	16,555	$	16,472
Diversified Financial Services — 0.1%
Avolon TLB Borrower 1 (US) LLC, 2023 Term Loan B6, 1 mo. USD Term SOFR + 2.000%
6.961% VRN 6/22/28		58,001		58,093
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 3 mo. USD Term SOFR + 3.750%
8.354% VRN 4/09/27		57,806		56,566
Jane Street Group LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.460% VRN 1/26/28		51,429		51,370
				166,029
Electric — 0.0%
Alpha Generation LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%,
7.595% VRN 9/19/31		50,636		50,627
South Field LLC
Term Loan C, 3 mo. USD Term SOFR + 3.750%
8.354% VRN 8/29/31		822		824
Term Loan B, 3 mo. USD Term SOFR + 3.750%
8.354% VRN 8/29/31		13,394		13,439
Vistra Operations Co. LLC, 1st Lien Term Loan B3, 1 mo. USD Term SOFR + 2.000%
6.845% VRN 12/20/30		9,919		9,918
				74,808
Electronics — 0.0%
II-VI, Inc., 2024 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.345% VRN 7/02/29		12,669		12,657
Engineering & Construction — 0.0%
Artera Services LLC, 2024 Term Loan, 3 mo. USD Term SOFR + 4.500%
9.104% VRN 2/15/31		36,421		35,413
Entertainment — 0.1%
Churchill Downs, Inc., 2021 Incremental Term Loan B1, 1 mo. USD Term SOFR + 2.000%
6.945% VRN 3/17/28		49,235		49,111
PENN Entertainment, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 2.750%
7.705% VRN 5/03/29		22,067		22,100
Showtime Acquisition LLC, 2024 1st Lien Term Loan, 3 mo. USD Term SOFR + 4.750%, 3 mo. U.S. (Fed) Prime Rate + 3.750%,
9.871% VRN 8/13/31		53,314		52,914
William Morris Endeavor Entertainment LLC, 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 2.750%
7.710% VRN 5/18/25		118,416		118,379
				242,504
Environmental Controls — 0.0%
Clean Harbors, Inc., 2023 Term Loan, 1 mo. USD Term SOFR + 1.750%
6.710% VRN 10/09/28		60,613		60,704

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Food — 0.0%
8th Avenue Food & Provisions, Inc., 2018 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.750%
8.710% VRN 10/01/25	$	7,205	$	6,963
United Natural Foods, Inc., 2024 Term Loan, 1 mo. USD Term SOFR + 4.750%
9.595% VRN 5/01/31		55,276		55,276
				62,239
Hand & Machine Tools — 0.0%
Alliance Laundry Systems LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 3.500%
8.345% VRN 8/19/31		35,561		35,586
Health Care - Products — 0.0%
Bausch & Lomb Corp.
Term Loan, 1 mo. USD Term SOFR + 3.250%
8.270% VRN 5/10/27		31,190		31,046
2023 Incremental Term Loan, 1 mo. USD Term SOFR + 4.000%
8.845% VRN 9/29/28		27,913		27,861
Medline Borrower LP, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.750%
7.595% VRN 10/23/28		73,938		73,930
				132,837
Health Care - Services — 0.1%
Catalent Pharma Solutions, Inc., 2021 Term Loan B3, 1 mo. USD Term SOFR + 2.000%
7.034% VRN 2/22/28		132,109		131,944
Modivcare, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 4.750%,
9.343% VRN 7/01/31		140,610		132,525
Star Parent, Inc., Term Loan B, 3 mo. USD Term SOFR + 3.750%
8.354% VRN 9/27/30		33,399		32,447
				296,916
Home Furnishing — 0.0%
AI Aqua Merger Sub, Inc., 2021 1st Lien Term Loan B, 1 mo. USD Term SOFR + 3.500%
8.357% VRN 7/31/28		20,432		20,402
Insurance — 0.1%
Acrisure LLC, 2024 Term Loan B1, 1 mo. USD Term SOFR + 3.000%
7.961% VRN 2/16/27		95,285		94,862
AmWINS Group, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.210% VRN 2/19/28		171,526		171,185
Asurion LLC, 2020 Term Loan B8, 1 mo. USD Term SOFR + 3.250%
8.210% VRN 12/23/26		79,794		79,703
				345,750
Internet — 0.1%
Arches Buyer, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.195% VRN 12/06/27		24,660		23,612
Buzz Finco LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%
7.695% VRN 1/29/27		24,178		24,078
Gen Digital, Inc., 2021 Term Loan A, 1 mo. USD Term SOFR + 1.500%
6.445% VRN 9/10/27		71,920		71,732

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Match Group, Inc., 2020 Term Loan B, 3 mo. USD Term SOFR + 1.750%
6.714% VRN 2/13/27	$	10,674	$	10,634
MH Sub I LLC, 2023 Term Loan, 1 mo. USD Term SOFR + 4.250%
9.095% VRN 5/03/28		17,474		17,351
PUG LLC, 2024 Extended Term Loan B, 1 mo. USD Term SOFR + 4.750%
9.595% VRN 3/15/30		17,991		17,939
Research Now Group, Inc., 2024 First Lien Second Out Term Loan, 3 mo. USD Term SOFR + 5.500%
0.000% VRN 10/15/28		19,516		17,979
				183,325
Leisure Time — 0.0%
Sabre GLBL, Inc., 2022 1st Lien Term Loan B, 1 mo. USD Term SOFR + 5.000%
9.945% VRN 6/30/28		15,527		14,712
Lodging — 0.0%
Hilton Domestic Operating Co., Inc., 2023 Term Loan B4, 1 mo. USD Term SOFR + 1.750%
6.605% VRN 11/08/30		11,519		11,513
Machinery - Diversified — 0.0%
ASP Blade Holdings, Inc., Initial Term Loan, 3 mo. USD Term SOFR + 4.000%
8.865% VRN 10/13/28		39,335		28,960
Media — 0.1%
CSC Holdings LLC, 2019 Term Loan B5, 1 mo. USD Term SOFR + 2.500%
7.460% VRN 4/15/27		46,810		42,731
Telenet Financing USD LLC, 2020 USD Term Loan AR, 1 mo. USD Term SOFR + 2.000%
7.211% VRN 4/30/28		25,828		24,860
Virgin Media Bristol LLC, 2023 USD Term Loan Y, 6 mo. USD Term SOFR + 3.250%
8.656% VRN 3/31/31		150,000		143,083
				210,674
Office & Business Equipment — 0.0%
Xerox Holdings Corp., 2023 Term Loan B, 1 mo. USD Term SOFR + 4.000%, 3 mo. USD Term SOFR + 4.000%
8.604% - 8.845% VRN 11/17/29		21,877		21,762
Packaging & Containers — 0.1%
Berry Global, Inc., 2023 Term Loan AA, 3 mo. USD Term SOFR + 1.750%
7.316% VRN 7/01/29		224,464		225,007
Pharmaceuticals — 0.1%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD Term SOFR + 4.000%
8.704% VRN 10/01/27		97,222		92,320
Jazz Financing Lux SARL, 2024 1st Lien Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.095% VRN 5/05/28		162,885		162,667
				254,987
Real Estate Investment Trusts (REITS) — 0.1%
Healthpeak Properties, Inc.

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2024 Term Loan A3, 3 mo. USD Term SOFR + 0.850%
0.000% VRN 3/01/29	$	204,135	$	198,521
Term Loan A2, 1 mo. USD Term SOFR + 1.600%
6.455% VRN 2/22/27		101,146		98,871
Term Loan A1, 1 mo. USD Term SOFR + 1.600%
6.455% VRN 8/20/27		101,146		98,870
				396,262
Retail — 0.1%
1011778 B.C. Unlimited Liability Co., 2024 Term Loan B6, 1 mo. USD Term SOFR + 1.750%
6.595% VRN 9/20/30		54,162		53,563
KFC Holding Co., 2021 Term Loan B, 1 mo. USD Term SOFR + 1.750%
6.879% VRN 3/15/28		38,715		38,812
Michaels Cos., Inc., 2021 Term Loan B, 3 mo. USD Term SOFR + 4.250%
9.115% VRN 4/17/28		232,200		182,625
Peer Holding III BV, 2024 USD Term Loan B5, 3 mo. USD Term SOFR + 3.000%
7.604% VRN 7/01/31		48,762		48,843
				323,843
Software — 0.2%
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.095% VRN 2/15/29		233,861		232,156
Banff Merger Sub, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.005% VRN 7/30/31		41,519		41,408
Central Parent, Inc., 2024 Term Loan B, 3 mo. USD Term SOFR + 3.250%
7.854% VRN 7/06/29		40,000		39,547
EagleView Technology Corp., 2018 Add On Term Loan B, 3 mo. USD Term SOFR + 3.500%
8.366% VRN 8/14/25		131,802		125,194
Iron Mountain, Inc., 2023 Term Loan B, 1 mo. USD Term SOFR + 2.000%
6.845% VRN 1/31/31		27,184		26,980
RealPage, Inc., 1st Lien Term Loan, 1 mo. USD Term SOFR + 3.000%
7.960% VRN 4/24/28		20,122		19,518
Renaissance Holding Corp., 2024 Term Loan, 1 mo. USD Term SOFR + 4.250%
9.095% VRN 4/05/30		32,080		32,048
				516,851
Telecommunications — 0.1%
Altice France SA, 2023 USD Term Loan B14, 3 mo. USD Term SOFR + 5.500%
10.801% VRN 8/15/28		33,248		24,839
CCI Buyer, Inc., Term Loan, 3 mo. USD Term SOFR + 4.000%
8.604% VRN 12/17/27		29,196		29,136
SBA Senior Finance II LLC, 2024 Term Loan B, 1 mo. USD Term SOFR + 2.000%
6.850% VRN 1/25/31		34,437		34,445

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Zayo Group Holdings, Inc., 2022 USD Incremental Term Loan B, 1 mo. USD Term SOFR + 4.250%
9.095% VRN 3/09/27	$	111,123	$	102,205
				190,625

TOTAL BANK LOANS (Cost $4,519,689)				4,394,859

CORPORATE DEBT — 16.1%
Aerospace & Defense — 0.1%
Boeing Co.
5.805% 5/01/50		335,000		323,650
6.528% 5/01/34 (b)		160,000		171,722
				495,372
Agriculture — 0.2%
BAT Capital Corp.
4.758% 9/06/49		34,000		29,341
5.650% 3/16/52		185,000		180,579
Imperial Brands Finance PLC
3.500% 7/26/26 (b)		225,000		220,524
Reynolds American, Inc.
5.850% 8/15/45		235,000		235,109
				665,553
Airlines — 0.2%
United Airlines Pass-Through Trust, Series 2023-1, Class A,
5.800% 7/15/37		650,142		682,329
Banks — 4.4%
Bank of America Corp.
1 day USD SOFR + 0.910% 1.658% VRN 3/11/27		290,000		278,753
1 day USD SOFR + 1.370% 1.922% VRN 10/24/31		70,000		60,315
1 day USD SOFR + 1.060% 2.087% VRN 6/14/29		895,000		826,492
1 day USD SOFR + 1.050% 2.551% VRN 2/04/28		635,000		610,097
1 day USD SOFR + 1.210% 2.572% VRN 10/20/32		75,000		65,763
1 day USD SOFR + 2.150% 2.592% VRN 4/29/31		55,000		49,876
3 mo. USD Term SOFR + 1.302% 3.419% VRN 12/20/28		470,000		457,217
3 mo. USD Term SOFR + 1.837% 3.824% VRN 1/20/28		415,000		410,510
3 mo. USD Term SOFR + 1.332% 3.970% VRN 3/05/29		485,000		479,285
Citigroup, Inc.
1 day USD SOFR + 1.167% 2.561% VRN 5/01/32		105,000		92,287
1 day USD SOFR + 1.422% 2.976% VRN 11/05/30		150,000		139,592
3 mo. USD Term SOFR + 1.454% 4.075% VRN 4/23/29		525,000		519,850
Goldman Sachs Group, Inc.
1 day USD SOFR + 0.798% 1.431% VRN 3/09/27		340,000		325,215
1 day USD SOFR + 0.818% 1.542% VRN 9/10/27		1,300,000		1,232,029
HSBC Holdings PLC 1 day USD SOFR + 1.732%
2.013% VRN 9/22/28		625,000		583,134
JP Morgan Chase & Co.
1 day USD SOFR + 0.885% 1.578% VRN 4/22/27		640,000		613,100
1 day USD SOFR + 1.015% 2.069% VRN 6/01/29		1,500,000		1,387,776
3 mo. USD Term SOFR + 1.510% 2.739% VRN 10/15/30		230,000		213,074
1 day USD SOFR + 1.310% 5.012% VRN 1/23/30		125,000		128,200
JPMorgan Chase & Co. 1 day USD SOFR + 0.800%
1.045% VRN 11/19/26		95,000		91,288

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Morgan Stanley
1 day USD SOFR + 0.560% 1.164% VRN 10/21/25	$	1,300,000	$	1,297,360
1 day USD SOFR + 0.879% 1.593% VRN 5/04/27		170,000		162,671
1 day USD SOFR + 1.020% 1.928% VRN 4/28/32		90,000		76,360
1 day USD SOFR + 1.178% 2.239% VRN 7/21/32		70,000		60,266
1 day USD SOFR + 1.290% 2.943% VRN 1/21/33		100,000		89,325
PNC Financial Services Group, Inc.
1 day USD SOFR + 1.933% 5.068% VRN 1/24/34		215,000		217,979
1 day USD SOFR + 1.902% 5.676% VRN 1/22/35		45,000		47,705
1 day USD SOFR + 2.284% 6.875% VRN 10/20/34		85,000		97,323
Santander UK Group Holdings PLC
1 yr. CMT + 1.250% 1.532% VRN 8/21/26		710,000		689,002
1 day USD SOFR + 0.989% 1.673% VRN 6/14/27		120,000		114,145
1 day USD SOFR + 1.220% 2.469% VRN 1/11/28		200,000		190,521
US Bancorp
1 day USD SOFR + 1.600% 4.839% VRN 2/01/34		330,000		329,768
1 day USD SOFR + 1.860% 5.678% VRN 1/23/35		45,000		47,700
1 day USD SOFR + 2.090% 5.850% VRN 10/21/33		55,000		58,667
Wells Fargo & Co.
1 day USD SOFR + 2.100% 2.393% VRN 6/02/28		940,000		893,768
3 mo. USD Term SOFR + 1.432% 2.879% VRN 10/30/30		310,000		287,528
1 day USD SOFR + 1.500% 3.350% VRN 3/02/33		285,000		260,540
1 day USD SOFR + 2.100% 4.897% VRN 7/25/33		400,000		404,585
1 day USD SOFR + 1.740% 5.574% VRN 7/25/29		240,000		249,697
				14,138,763
Beverages — 0.2%
Bacardi Ltd.
4.450% 5/15/25 (b)		485,000		482,839
Diageo Capital BV
1.875% 6/08/34 EUR (b) (d)		100,000		99,852
Pernod Ricard SA
3.625% 5/07/34 EUR (b) (d)		100,000		113,120
				695,811
Chemicals — 0.3%
International Flavors & Fragrances, Inc.
1.832% 10/15/27 (b)		70,000		64,827
2.300% 11/01/30 (b)		570,000		499,903
3.268% 11/15/40 (b)		30,000		22,985
3.468% 12/01/50 (b)		65,000		46,136
4.375% 6/01/47		65,000		54,632
5.000% 9/26/48		170,000		156,503
				844,986
Commercial Services — 0.1%
Worldline SA, Convertible,
0.000% 7/30/26 EUR (b) (d)		160,000		161,629
Diversified Financial Services — 0.6%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.500% 1/15/25		1,000,000		995,179
Air Lease Corp.
5.850% 12/15/27		355,000		370,156
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (b)		389,000		363,250

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
2.875% 2/15/25 (b)	$	335,000	$	331,500
				2,060,085
Electric — 1.6%
Alpha Generation LLC
6.750% 10/15/32 (b)		55,000		55,775
Amprion GmbH
0.625% 9/23/33 EUR (b) (d)		100,000		88,035
Appalachian Power Co.
5.650% 4/01/34		870,000		914,830
Arizona Public Service Co.
6.350% 12/15/32		445,000		489,212
Duke Energy Carolinas LLC
4.000% 9/30/42		820,000		716,456
Duke Energy Florida LLC
5.875% 11/15/33		70,000		76,595
E.ON SE
3.500% 10/26/37 EUR (d)		100,000		109,806
Elia Group SA
3.875% 6/11/31 EUR (b) (d)		100,000		112,771
Elia Transmission Belgium SA
3.750% 1/16/36 EUR (b) (d)		100,000		113,454
Eurogrid GmbH
0.741% 4/21/33 EUR (b) (d)		100,000		89,759
Florida Power & Light Co.
3.990% 3/01/49		495,000		422,400
Jersey Central Power & Light Co.
6.400% 5/15/36		120,000		134,369
MidAmerican Energy Co.
4.800% 9/15/43		1,400,000		1,354,604
MVM Energetika Zrt
6.500% 3/13/31 (b)		200,000		207,682
Southwestern Electric Power Co.
3.250% 11/01/51		170,000		117,667
TenneT Holding BV
4.500% 10/28/34 EUR (b) (d)		145,000		177,303
				5,180,718
Electronics — 0.1%
Honeywell International, Inc.
3.750% 3/01/36 EUR (d)		145,000		163,720
4.125% 11/02/34 EUR (d)		140,000		164,671
				328,391
Entertainment — 0.6%
Warnermedia Holdings, Inc.
4.279% 3/15/32 (e)		415,000		368,658
5.050% 3/15/42		905,000		738,763
5.141% 3/15/52		990,000		763,562
				1,870,983
Food — 0.6%
ELO SACA
6.000% 3/22/29 EUR (b) (d)		200,000		206,400
JBS USA Holding Lux SARL/JBS USA Food Co./JBS Lux Co. SARL
4.375% 2/02/52		135,000		107,222

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
6.500% 12/01/52	$	210,000	$	224,006
6.750% 3/15/34 (b)		245,000		271,435
Mondelez International, Inc.
0.750% 3/17/33 EUR (d)		160,000		145,737
Pilgrim's Pride Corp.
3.500% 3/01/32 (b)		403,000		357,823
Smithfield Foods, Inc.
2.625% 9/13/31 (b)		635,000		538,081
				1,850,704
Gas — 0.3%
KeySpan Gas East Corp.
5.994% 3/06/33 (b)		630,000		660,526
National Gas Transmission PLC
4.250% 4/05/30 EUR (b) (d)		100,000		116,371
Piedmont Natural Gas Co., Inc.
5.100% 2/15/35		150,000		152,081
5.400% 6/15/33		155,000		162,156
				1,091,134
Health Care - Products — 0.1%
Medtronic Global Holdings SCA
3.375% 10/15/34 EUR (d)		100,000		113,160
Stryker Corp.
3.375% 9/11/32 EUR (d)		100,000		112,452
				225,612
Health Care - Services — 0.7%
Centene Corp.
3.000% 10/15/30		453,000		405,538
Cigna Group
3.400% 3/15/51		250,000		182,713
CommonSpirit Health
2.782% 10/01/30		290,000		263,828
Fortrea Holdings, Inc.
7.500% 7/01/30 (b)		50,000		50,328
Fresenius Medical Care US Finance III, Inc.
1.875% 12/01/26 (b)		340,000		319,988
HCA, Inc.
3.500% 7/15/51		182,000		131,141
Kedrion SpA
6.500% 9/01/29 (b)		220,000		209,000
Lonza Finance International NV
3.875% 4/24/36 EUR (b) (d)		145,000		166,382
ModivCare Escrow Issuer, Inc.
5.000% 10/01/29 (b) (e)		382,000		237,875
Universal Health Services, Inc.
1.650% 9/01/26		385,000		364,697
				2,331,490
Household Products & Wares — 0.1%
Central Garden & Pet Co.
5.125% 2/01/28		123,000		121,871

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Spectrum Brands, Inc.
3.875% 3/15/31 (b)	$	383,000	$	335,314
				457,185
Insurance — 0.5%
Athene Global Funding
1.985% 8/19/28 (b)		205,000		186,018
3.205% 3/08/27 (b)		135,000		129,523
Farmers Exchange Capital III 3 mo. USD LIBOR + 3.454%
5.454% VRN 10/15/54 (b)		970,000		867,296
Teachers Insurance & Annuity Association of America
3.300% 5/15/50 (b)		225,000		164,597
4.270% 5/15/47 (b)		130,000		112,982
Willis North America, Inc.
2.950% 9/15/29		290,000		269,062
				1,729,478
Internet — 0.1%
Uber Technologies, Inc.
4.800% 9/15/34		325,000		324,550
Investment Companies — 0.1%
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
9.000% 6/15/30 (b)		240,000		241,984
Machinery - Diversified — 0.0%
OT Merger Corp.
7.875% 10/15/29 (b)		90,000		36,900
Media — 0.9%
Cable One, Inc.
4.000% 11/15/30 (b) (e)		70,000		55,799
CCO Holdings LLC/CCO Holdings Capital Corp.
4.500% 8/15/30 (b)		10,000		9,065
4.750% 3/01/30 (b)		30,000		27,595
Charter Communications Operating LLC/Charter Communications Operating Capital
3.700% 4/01/51		560,000		357,497
3.750% 2/15/28		92,000		88,305
3.900% 6/01/52		314,000		205,872
4.800% 3/01/50		330,000		252,639
4.908% 7/23/25		48,000		47,921
5.375% 5/01/47		95,000		79,765
5.750% 4/01/48		280,000		244,518
CSC Holdings LLC
5.750% 1/15/30 (b)		53,000		27,435
6.500% 2/01/29 (b)		502,000		415,743
7.500% 4/01/28 (b)		32,000		21,390
11.750% 1/31/29 (b)		100,000		96,659
Time Warner Cable LLC
5.500% 9/01/41		535,000		463,881
5.875% 11/15/40		170,000		154,162
VZ Secured Financing BV
5.000% 1/15/32 (b)		420,000		386,502
				2,934,748

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Oil & Gas — 0.1%
Pertamina Persero PT
3.100% 8/27/30 (b)	$	200,000	$	183,560
Petroleos Mexicanos
5.950% 1/28/31 (e)		50,000		43,274
6.625% 6/15/35		300,000		244,952
Shell International Finance BV
3.750% 9/12/46		25,000		20,507
				492,293
Packaging & Containers — 0.5%
Amcor Finance USA, Inc.
3.625% 4/28/26		650,000		641,030
Ardagh Packaging Finance PLC/Ardagh Holdings USA, Inc.
4.125% 8/15/26 (b) (e)		50,000		45,072
5.250% 8/15/27 (b)		295,000		219,891
5.250% 8/15/27 (b) (e)		70,000		52,178
Berry Global, Inc.
1.570% 1/15/26		394,000		379,134
1.650% 1/15/27		12,000		11,265
4.875% 7/15/26 (b)		154,000		153,754
				1,502,324
Pharmaceuticals — 0.8%
1375209 BC Ltd.
9.000% 1/30/28 (b) (e)		225,000		223,001
Bayer US Finance II LLC
4.375% 12/15/28 (b)		893,000		881,319
4.625% 6/25/38 (b)		795,000		722,727
4.875% 6/25/48 (b)		210,000		182,046
Grifols SA
3.875% 10/15/28 EUR (b) (d)		200,000		206,917
4.750% 10/15/28 (b) (e)		80,000		74,934
Johnson & Johnson
3.550% 6/01/44 EUR (d)		100,000		113,639
MSD Netherlands Capital BV
3.700% 5/30/44 EUR (d)		165,000		185,756
				2,590,339
Pipelines — 0.4%
Energy Transfer LP
4.950% 6/15/28		125,000		127,130
5.000% 5/15/50		35,000		31,620
5.150% 3/15/45		335,000		312,179
Galaxy Pipeline Assets Bidco Ltd.
2.160% 3/31/34 (b)		154,852		137,240
TransMontaigne Partners LP/TLP Finance Corp.
6.125% 2/15/26		181,000		177,882
Venture Global Calcasieu Pass LLC
3.875% 8/15/29 (b)		270,000		255,159
Venture Global LNG, Inc.
9.500% 2/01/29 (b)		108,000		121,663
				1,162,873

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Private Equity — 0.1%
CBRE Global Investors Open-Ended Funds SCA SICAV-SIF-Pan European Core Fund
4.750% 3/27/34 EUR (b) (d)	$	140,000	$	164,125
Real Estate — 0.3%
Annington Funding PLC
3.184% 7/12/29 GBP (b) (d)		200,000		241,425
3.685% 7/12/34 GBP (b) (d)		100,000		112,219
Blackstone Property Partners Europe Holdings SARL
1.625% 4/20/30 EUR (b) (d)		100,000		98,646
1.750% 3/12/29 EUR (b) (d)		200,000		204,547
Vonovia SE
0.750% 9/01/32 EUR (b) (d)		100,000		89,409
2.250% 4/07/30 EUR (b) (d)		100,000		105,304
				851,550
Real Estate Investment Trusts (REITS) — 1.4%
American Assets Trust LP
6.150% 10/01/34		295,000		298,406
American Homes 4 Rent LP
3.375% 7/15/51		205,000		144,281
American Tower Corp.
2.300% 9/15/31		356,000		306,323
2.700% 4/15/31		80,000		71,414
Digital Intrepid Holding BV
0.625% 7/15/31 EUR (b) (d)		425,000		387,319
Extra Space Storage LP
2.350% 3/15/32		30,000		25,320
2.400% 10/15/31		76,000		65,382
2.550% 6/01/31		130,000		113,183
GLP Capital LP/GLP Financing II, Inc.
4.000% 1/15/30		512,000		488,885
4.000% 1/15/31		75,000		70,307
Healthcare Realty Holdings LP
2.050% 3/15/31		67,000		55,104
2.400% 3/15/30		195,000		170,216
3.100% 2/15/30		95,000		87,289
3.625% 1/15/28		45,000		43,037
Hudson Pacific Properties LP
3.250% 1/15/30 (e)		416,000		315,405
3.950% 11/01/27		68,000		61,465
4.650% 4/01/29 (e)		135,000		112,109
5.950% 2/15/28		10,000		9,171
Invitation Homes Operating Partnership LP
2.000% 8/15/31		405,000		339,916
5.500% 8/15/33		65,000		66,921
LXP Industrial Trust
2.375% 10/01/31		430,000		360,124
Prologis Euro Finance LLC
4.625% 5/23/33 EUR (d)		310,000		371,647
Realty Income Corp.
5.125% 7/06/34 EUR (d)		270,000		331,757
Rexford Industrial Realty LP
2.150% 9/01/31		5,000		4,213
VICI Properties LP
4.950% 2/15/30		60,000		60,355

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
VICI Properties LP/VICI Note Co., Inc.
3.875% 2/15/29 (b)	$	60,000	$	57,464
4.125% 8/15/30 (b)		19,000		18,043
4.500% 1/15/28 (b)		48,000		47,350
4.625% 6/15/25 (b)		15,000		14,908
				4,497,314
Retail — 0.2%
Ferrellgas LP/Ferrellgas Finance Corp.
5.875% 4/01/29 (b)		225,000		210,553
Michaels Cos., Inc.
5.250% 5/01/28 (b) (e)		170,000		125,478
Papa John's International, Inc.
3.875% 9/15/29 (b) (e)		200,000		185,097
				521,128
Savings & Loans — 0.1%
Nationwide Building Society 1 day USD SOFR + 1.290%
2.972% VRN 2/16/28 (b) (e)		215,000		207,328
Software — 0.0%
Helios Software Holdings, Inc./ION Corporate Solutions Finance SARL
8.750% 5/01/29 (b)		30,000		30,665
Open Text Corp.
6.900% 12/01/27 (b)		50,000		52,739
				83,404
Telecommunications — 0.3%
Altice France SA
8.125% 2/01/27 (b) (e)		65,000		53,153
Frontier Communications Holdings LLC
8.625% 3/15/31 (b)		109,000		117,512
Sprint Spectrum Co. LLC/Sprint Spectrum Co. II LLC/Sprint Spectrum Co. III LLC
4.738% 9/20/29 (b)		86,875		86,647
T-Mobile USA, Inc.
3.750% 4/15/27		375,000		370,493
4.700% 1/15/35		465,000		463,370
				1,091,175
Water — 0.1%
Suez SACA
2.875% 5/24/34 EUR (b) (d)		200,000		209,510

TOTAL CORPORATE DEBT (Cost $53,337,089)				51,721,768

MUNICIPAL OBLIGATIONS — 0.8%
California — 0.1%
California State University, Revenue Bonds, Series B,
2.374% 11/01/35		5,000		4,062
University of California, Revenue Bonds, Series BI,
2.247% 5/15/34		290,000		240,325
				244,387

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
New Jersey — 0.1%
Jersey City Municipal Utilities Authority, NJ, Revenue Bonds, Series B,
5.470% 5/15/27	$	400,000	$	408,938
New York — 0.6%
City of New York, NY, General Obligation, Series G1,
5.968% 3/01/36		500,000		542,836
New York City Transitional Finance Authority, NY, Future Tax Secured Revenue, Revenue Bonds, Series G3,
2.450% 11/01/34		560,000		465,295
New York State Dormitory Authority, Revenue Bonds, Series H,
5.289% 3/15/33		750,000		762,883
				1,771,014

TOTAL MUNICIPAL OBLIGATIONS (Cost $2,659,289)				2,424,339

NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 16.3%
Commercial Mortgage-Backed Securities — 3.1%
BAMLL Commercial Mortgage Securities Trust, Series 2018-PARK, Class A,
4.227% VRN 8/10/38 (b) (f)		620,000		594,316
BX Commercial Mortgage Trust
Series 2020-VIV4, Class A, 2.843% 3/09/44 (b)		1,160,000		1,050,922
Series 2020-VIVA, Class D, 3.667% VRN 3/11/44 (b) (f)		780,000		700,145
Series 2022-CSMO, Class A, 1 mo. USD Term SOFR + 2.115% 7.211% FRN 6/15/27 (b)		692,000		693,944
BX Trust
Series 2019-OC11, Class A, 3.202% 12/09/41 (b)		180,000		167,135
Series 2019-OC11, Class E, 4.076% VRN 12/09/41 (b) (f)		300,000		268,660
Series 2022-VAMF, Class C, 1 mo. USD Term SOFR + 1.580% 6.677% FRN 1/15/39 (b)		443,000		438,575
BXSC Commercial Mortgage Trust, Series 2022-WSS, Class D, 1 mo. USD Term SOFR + 3.188%
8.285% FRN 3/15/35 (b)		894,000		890,651
Century Plaza Towers, Series 2019-CPT, Class A
2.865% 11/13/39 (b)		355,000		317,118
DC Office Trust, Series 2019-MTC, Class A
2.965% 9/15/45 (b)		375,000		330,323
Grace Trust, Series 2020-GRCE, Class A
2.347% 12/10/40 (b)		900,000		775,684
GWT Trust, Series 2024-WLF2, Class B, 1 mo. USD Term SOFR + 2.141%
7.237% FRN 5/15/41 (b)		601,000		601,562
Hudson Yards Mortgage Trust
Series 2019-55HY, Class A, 3.041% VRN 12/10/41 (b) (f)		375,000		341,286
Series 2019-30HY, Class A, 3.228% 7/10/39 (b)		385,000		356,197
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2019-OSB, Class A
3.397% 6/05/39 (b)		385,000		354,294
MKT Mortgage Trust, Series 2020-525M, Class A
2.694% 2/12/40 (b)		255,000		218,635
One Bryant Park Trust, Series 2019-OBP, Class A
2.516% 9/15/54 (b)		490,000		435,740
SFAVE Commercial Mortgage Securities Trust, Series 2015-5AVE, Class A1,
3.872% VRN 1/05/43 (b) (f)		655,000		585,349
SMRT Commercial Mortgage Trust, Series 2022-MINI, Class F, 1 mo. USD Term SOFR + 3.350%
8.447% FRN 1/15/39 (b)		630,000		600,383

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Wells Fargo Commercial Mortgage Trust, Series 2019-JWDR, Class E,
3.989% VRN 9/15/31 (b) (f)	$	281,000	$	270,611
				9,991,530
Home Equity Asset-Backed Securities — 2.2%
Aegis Asset-Backed Securities Trust Mortgage Pass-Through Certificates, Series 2005-4, Class M2, 1 mo. USD Term SOFR + 0.819%
5.674% FRN 10/25/35		618,423		571,994
Countrywide Asset-Backed Certificates Trust, Series 2004-7, Class MF2,
4.128% VRN 10/25/34 (f)		1,434,255		1,374,181
GSAMP Trust, Series 2005-HE5, Class M3, 1 mo. USD Term SOFR + 0.804%
5.659% FRN 11/25/35		48,801		48,578
JP Morgan Mortgage Acquisition Trust, Series 2007-HE1, Class AF4,
4.341% STEP 3/25/47		2,503,010		1,660,106
Long Beach Mortgage Loan Trust, Series 2006-9, Class 2A2, 1 mo. USD Term SOFR + 0.334%
5.189% FRN 10/25/36		5,771,698		1,858,487
Morgan Stanley Capital I, Inc. Trust, Series 2006-HE1, Class A4, 1 mo. USD Term SOFR + 0.694%
5.549% FRN 1/25/36		702,573		671,604
Saxon Asset Securities Trust, Series 2007-2, Class A2C, 1 mo. USD Term SOFR + 0.354%
5.209% FRN 5/25/47		1,420,457		1,006,072
				7,191,022
Other Asset-Backed Securities — 3.9%
Barings CLO Ltd., Series 2018-4A, Class A1R, 3 mo. USD Term SOFR + 1.150%
6.451% FRN 10/15/30 (b)		794,375		794,945
BlueMountain CLO Ltd., Series 2018-3A, Class BR, 3 mo. USD Term SOFR + 1.850%
7.135% FRN 10/25/30 (b)		800,000		800,078
Dryden 45 Senior Loan Fund, Series 2016-45A, Class BRR, 3 mo. USD Term SOFR + 1.650%
6.242% FRN 10/15/30 (b)		700,000		700,124
Dryden XXVI Senior Loan Fund, Series 2013-26A, Class AR, 3 mo. USD Term SOFR + 1.162%
6.463% FRN 4/15/29 (b)		565,872		566,327
FirstKey Homes Trust, Series 2020-SFR2, Class E
2.668% 10/19/37 (b)		390,000		379,448
HPS Loan Management Ltd., Series 2021-16A, Class A1, 3 mo. USD Term SOFR + 1.402%
6.685% FRN 1/23/35 (b)		1,000,000		1,000,709
Madison Park Funding XXIX Ltd., Series 2018-29A, Class AR, 3 mo. USD Term SOFR + 1.180%
6.459% FRN 10/18/30 (b)		768,862		769,460
Magnetite XII Ltd., Series 2015-12A, Class AR4, 3 mo. USD Term SOFR + 1.150%
6.451% FRN 10/15/31 (b)		557,745		557,857
Magnetite XXV Ltd., Series 2020-25A, Class A, 3 mo. USD Term SOFR + 1.462%
6.746% FRN 1/25/32 (b)		724,223		724,611
OCP CLO Ltd., Series 2014-6A, Class A1R2, 3 mo. USD Term SOFR + 1.150%
6.436% FRN 10/17/30 (b)		523,204		523,458
Progress Residential Trust

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-SFR2, Class F, 3.395% 4/19/38 (b)	$	1,150,000	$	1,115,217
Series 2021-SFR10, Class F, 4.608% 12/17/40 (b)		1,187,982		1,110,821
Rockford Tower CLO Ltd.
Series 2019-2A, Class AR2, 3 mo. USD Term SOFR + 1.130% 6.091% FRN 8/20/32 (b) (c)		1,600,000		1,600,283
Series 2021-1A, Class A1, 3 mo. USD Term SOFR + 1.432% 6.714% FRN 7/20/34 (b)		850,000		851,267
TIAA CLO IV Ltd., Series 2018-1A, Class A1AR, 3 mo. USD Term SOFR + 1.140%
6.422% FRN 1/20/32 (b)		700,000		700,942
Vantage Data Centers Issuer LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (b)		444,000		429,535
				12,625,082
Student Loans Asset-Backed Securities — 1.2%
Access Group, Inc., Series 2015-1, Class A, 30 day USD SOFR Average + 0.814%
6.095% FRN 7/25/56 (b)		204,631		203,407
Collegiate Funding Services Education Loan Trust, Series 2005-A, Class A4, 90 day USD SOFR Average + 0.462%
5.794% FRN 3/28/35		746,012		718,412
SLM Student Loan Trust
Series 2007-7, Class A4, 90 day USD SOFR Average + 0.592% 5.951% FRN 1/25/22		288,392		282,677
Series 2012-7, Class A3, 30 day USD SOFR Average + 0.764% 6.045% FRN 5/26/26		420,408		410,899
Series 2012-2, Class A, 30 day USD SOFR Average + 0.814% 6.095% FRN 1/25/29		489,698		477,800
Series 2012-1, Class A3, 30 day USD SOFR Average + 1.064% 6.345% FRN 9/25/28		394,437		389,624
Series 2008-6, Class A4, 90 day USD SOFR Average + 1.362% 6.721% FRN 7/25/23		511,284		506,887
Series 2008-5, Class B, 90 day USD SOFR Average + 2.112% 7.471% FRN 7/25/73		700,000		701,911
				3,691,617
Whole Loan Collateral Collateralized Mortgage Obligations — 5.9%
American Home Mortgage Investment Trust, Series 2005-1, Class 6A, 6 mo. USD Term SOFR + 2.428%
7.183% FRN 6/25/45		141,328		139,941
Angel Oak Mortgage Trust
Series 2021-7, Class A1, 1.978% VRN 10/25/66 (b) (f)		189,238		164,326
Series 2022-6, Class A1, 4.300% STEP 7/25/67 (b)		746,448		744,989
Chase Mortgage Finance Trust, Series 2007-A1, Class 11A4,
4.684% VRN 3/25/37 (f)		182,485		175,441
Citigroup Mortgage Loan Trust, Series 2005-11, Class A2A, 1 yr. CMT + 2.400%
7.230% FRN 10/25/35		130,891		132,633
COLT Mortgage Loan Trust, Series 2021-6, Class A1,
1.907% VRN 12/25/66 (b) (f)		587,118		530,420
Countrywide Alternative Loan Trust
Series 2006-OA6, Class 1A2, 1 mo. USD Term SOFR + 0.534% 5.389% FRN 7/25/46		721,407		635,829
Series 2005-31, Class 2A1, 1 mo. USD Term SOFR + 0.714% 5.569% FRN 8/25/35		678,169		611,374
Credit Suisse Mortgage Trust, Series 2018-RPL9, Class A,
3.850% VRN 9/25/57 (b) (f)		656,668		635,580

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Deephaven Residential Mortgage Trust, Series 2021-4, Class A1,
1.931% VRN 11/25/66 (b) (f)	$	1,257,508	$	1,103,129
Deutsche Alt-A Securities, Inc. Mortgage Loan Trust, Series 2005-1, Class 1A3, 1 mo. USD Term SOFR + 0.614%
5.469% FRN 2/25/35		1,027,643		996,197
First Franklin Mortgage Loan Trust, Series 2006-FFH1, Class M1, 1 mo. USD Term SOFR + 0.669%
5.524% FRN 1/25/36		541,873		528,282
First Horizon Mortgage Pass-Through Trust, Series 2005-AR5, Class 2A1,
5.741% VRN 11/25/35 (f)		170,141		138,110
GS Mortgage-Backed Securities Corp. Trust, Series 2021-RPL1, Class A1,
1.750% VRN 12/25/60 (b) (f)		1,299,425		1,212,031
GS Mortgage-Backed Securities Trust, Series 2018-RPL1, Class A1A
3.750% 10/25/57 (b)		479,726		470,223
HarborView Mortgage Loan Trust, Series 2006-10, Class 1A1A, 1 mo. USD Term SOFR + 0.514%
5.856% FRN 11/19/36		1,456,674		1,170,613
Impac CMB Trust, Series 2005-1, Class 1A1, 1 mo. USD Term SOFR + 0.634%
5.489% FRN 4/25/35		780,384		737,147
IndyMac Index Mortgage Loan Trust
Series 2005-AR19, Class A1, 3.846% VRN 10/25/35 (f)		604,488		464,854
Series 2006-AR27, Class 1A3, 1 mo. USD Term SOFR + 0.654% 5.509% FRN 10/25/36		1,148,212		504,134
JP Morgan Mortgage Trust, Series 2021-13, Class A3,
2.500% VRN 4/25/52 (b) (f)		1,521,939		1,281,936
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2005-AR1, Class M1, 1 mo. USD Term SOFR + 1.184%
6.039% FRN 2/25/35		380,201		373,612
OBX Trust, Series 2021-J3, Class A1,
2.500% VRN 10/25/51 (b) (f)		1,613,779		1,356,268
Opteum Mortgage Acceptance Corp. Asset-Backed Pass-Through Certificates, Series 2005-4, Class M2, 1 mo. USD Term SOFR + 0.864%
5.719% FRN 11/25/35		1,450,000		1,416,181
Structured Asset Mortgage Investments II Trust, Series 2006-AR8, Class A2, 1 mo. USD Term SOFR + 0.534%
5.389% FRN 10/25/36		1,477,499		1,332,852
Washington Mutual Mortgage Pass-Through Certificates Trust
Series 2005-AR15, Class A1A1, 1 mo. USD Term SOFR + 0.634% 5.489% FRN 11/25/45		1,372,115		1,280,055
Series 2005-AR13, Class A1A1, 1 mo. USD Term SOFR + 0.694% 5.549% FRN 10/25/45		241,160		232,533
Series 2005-AR2, Class 2A21, 1 mo. USD Term SOFR + 0.774% 5.629% FRN 1/25/45		197,177		197,335
Series 2006-1, Class 3A2, 5.750% 2/25/36		414,281		380,241
				18,946,266

TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $52,960,169)				52,445,517

SOVEREIGN DEBT OBLIGATIONS — 0.6%
Brazilian Government International Bond
6.125% 3/15/34		200,000		203,808
Colombia Government International Bond
3.125% 4/15/31		200,000		165,000
Dominican Republic International Bond
4.500% 1/30/30 (b)		200,000		190,957

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Mexico Government International Bond
4.875% 5/19/33 (e)	$	300,000	$	287,399
Panama Government International Bond
6.400% 2/14/35		200,000		204,688
Paraguay Government International Bond
4.950% 4/28/31 (b)		200,000		199,437
Perusahaan Penerbit SBSN Indonesia III
2.550% 6/09/31 (b)		200,000		177,716
Republic of South Africa Government International Bond
5.875% 4/20/32		250,000		249,094
Romanian Government International Bond
3.000% 2/14/31 (b)		110,000		95,946
				1,774,045

TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,783,695)				1,774,045

U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (g) — 38.2%
Collateralized Mortgage Obligations — 0.9%
Federal Home Loan Mortgage Corp. REMICS
Series 4818, Class CA, 3.000% 4/15/48		124,727		112,675
Series 4639, Class HZ, 3.250% STEP 4/15/53		1,707,872		1,439,267
Series 4846, Class PA, 4.000% 6/15/47		26,785		26,619
Federal National Mortgage Association REMICS
Series 2018-43, Class CT, 3.000% 6/25/48		222,056		200,891
Series 2018-57, Class QA, 3.500% 5/25/46		27,589		27,350
Government National Mortgage Association REMICS
Series 2018-124, Class NW, 3.500% 9/20/48		213,257		198,107
Series 2019-15, Class GT, 3.500% 2/20/49		133,999		124,340
Series 2024-97, Class FW, 30 day USD SOFR Average + 1.150% 6.495% FRN 6/20/54		298,898		298,553
Series 2024-30, Class AF, 30 day USD SOFR Average + 1.250% 6.500% FRN 2/20/54		491,192		491,064
				2,918,866
Pass-Through Securities — 37.0%
Federal Home Loan Mortgage Corp.
Pool #QD7213 2.000% 2/01/52		1,960,856		1,623,945
Pool #SD8199 2.000% 3/01/52		1,184,240		980,765
Pool #QE0312 2.000% 4/01/52		1,098,280		908,545
Pool #RA4179 2.500% 12/01/50		1,502,136		1,297,781
Pool #SD8194 2.500% 2/01/52		1,454,669		1,257,681
Pool #RA6815 2.500% 2/01/52		1,977,972		1,718,155
Pool #SD8205 2.500% 4/01/52		1,581,404		1,366,266
Pool #SD8212 2.500% 5/01/52		1,544,826		1,334,663
Pool #G08710 3.000% 6/01/46		84,885		77,818
Pool #ZM1779 3.000% 9/01/46		431,187		394,844
Pool #G08726 3.000% 10/01/46		639,757		586,497
Pool #G08732 3.000% 11/01/46		233,292		213,725
Pool #G08741 3.000% 1/01/47		646,223		592,021
Pool #QD8259 3.000% 3/01/52		1,768,494		1,592,495
Pool #SD8220 3.000% 6/01/52		2,286,684		2,053,219
Pool #G07848 3.500% 4/01/44		996,502		956,908
Pool #G60023 3.500% 4/01/45		918,934		879,068
Pool #G08711 3.500% 6/01/46		277,223		262,597
Pool #G08716 3.500% 8/01/46		389,641		369,084

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #G67700 3.500% 8/01/46	$	461,096	$	439,507
Pool #G08722 3.500% 9/01/46		68,059		64,468
Pool #G08742 3.500% 1/01/47		318,202		301,116
Pool #G08757 3.500% 4/01/47		81,378		77,008
Pool #ZA5103 3.500% 12/01/47		3,053		2,880
Pool #G67707 3.500% 1/01/48		1,675,266		1,598,399
Pool #G08800 3.500% 2/01/48		28,250		26,680
Pool #G08816 3.500% 6/01/48		224,825		212,121
Pool #G61556 3.500% 8/01/48		385,534		365,556
Pool #G60344 4.000% 12/01/45		492,896		484,029
Pool #G67711 4.000% 3/01/48		541,732		530,462
Pool #G67713 4.000% 6/01/48		2,246		2,193
Pool #SD3246 4.000% 8/01/52		1,675,534		1,609,590
Pool #RA7921 4.000% 9/01/52		1,570,386		1,513,954
Pool #SD5321 4.000% 10/01/52		1,682,093		1,616,915
Pool #SD5323 4.000% 1/01/54		872,650		838,291
Pool #G08843 4.500% 10/01/48		103,371		103,216
Pool #SD2322 4.500% 9/01/52		481,651		473,631
Pool #SD8275 4.500% 12/01/52		2,144,553		2,108,846
Pool #SD2730 4.500% 4/01/53		1,408,660		1,385,205
Pool #G08833 5.000% 7/01/48		69,753		70,976
Pool #G08844 5.000% 10/01/48		63,506		64,620
Federal National Mortgage Association
Pool #MA4176 2.000% 11/01/40		1,116,344		977,910
Pool #MA4333 2.000% 5/01/41		166,644		145,667
Pool #MA4158 2.000% 10/01/50		931,043		774,855
Pool #BQ6913 2.000% 12/01/51		2,081,282		1,723,679
Pool #MA4492 2.000% 12/01/51		1,595,352		1,321,240
Pool #BQ7006 2.000% 1/01/52		3,299,915		2,732,928
Pool #CB2802 2.000% 2/01/52		1,041,679		867,256
Pool #MA4562 2.000% 3/01/52		3,931,479		3,255,978
Pool #FS1598 2.000% 4/01/52		1,495,232		1,238,323
Pool #FS8510 2.000% 10/01/52		1,088,396		901,389
Pool #MA4512 2.500% 1/01/52		1,538,522		1,329,506
Pool #MA4548 2.500% 2/01/52		1,477,028		1,277,012
Pool #MA4563 2.500% 3/01/52		1,510,347		1,304,876
Pool #MA1607 3.000% 10/01/33		221,012		213,020
Pool #MA3811 3.000% 10/01/49		189,256		170,170
Pool #CB2430 3.000% 12/01/51		2,657,215		2,391,110
Pool #CB2545 3.000% 1/01/52		1,526,543		1,373,668
Pool #BV8477 3.000% 5/01/52		511,741		460,773
Pool #AB4262 3.500% 1/01/32		178,605		175,692
Pool #MA1512 3.500% 7/01/33		94,009		92,065
Pool #MA1148 3.500% 8/01/42		569,634		542,855
Pool #CA0996 3.500% 1/01/48		110,381		104,545
Pool #MA3305 3.500% 3/01/48		21,696		20,461
Pool #BL1132 3.730% 1/01/29		920,000		906,383
Pool #MA1146 4.000% 8/01/42		234,193		229,399
Pool #AS9830 4.000% 6/01/47		108,093		105,256
Pool #MA3027 4.000% 6/01/47		164,011		159,706
Pool #AS9972 4.000% 7/01/47		99,580		96,966
Pool #FS4947 4.000% 1/01/53		846,186		813,398
Pool #931504 4.500% 7/01/39		33,624		33,907
Pool #CA1710 4.500% 5/01/48		366,977		366,142
Pool #CA1711 4.500% 5/01/48		115,655		115,392
Pool #CA2208 4.500% 8/01/48		206,968		206,432
Pool #MA4701 4.500% 8/01/52		612,333		602,138
Pool #MA4733 4.500% 9/01/52		388,143		381,680

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #CB4800 4.500% 10/01/52	$	1,975,638	$	1,942,743
Pool #BW9897 4.500% 10/01/52		669,572		658,392
Pool #FS4701 4.500% 4/01/53		1,645,213		1,617,820
Pool #AD6374 5.000% 5/01/40		6,956		7,144
Pool #AI2733 5.000% 5/01/41		78,246		80,438
Pool #MA4978 5.000% 4/01/53		157,836		157,861
Pool #FS7252 5.000% 11/01/53		987,175		986,409
Pool #977014 5.500% 5/01/38		7,297		7,596
Pool #985524 5.500% 6/01/38		11,925		12,429
Pool #988578 5.500% 8/01/38		72,839		76,007
Pool #995482 5.500% 1/01/39		46,435		48,364
Government National Mortgage Association II
Pool #MA4126 3.000% 12/20/46		498,633		458,541
Pool #MA4718 3.000% 9/20/47		54,088		49,671
Pool #MA4836 3.000% 11/20/47		189,321		173,862
Pool #MA6209 3.000% 10/20/49		166,435		148,632
Pool #MA3521 3.500% 3/20/46		192,869		183,422
Pool #MA3597 3.500% 4/20/46		60,054		57,113
Pool #MA3663 3.500% 5/20/46		87,501		83,215
Pool #MA3937 3.500% 9/20/46		72,095		68,519
Pool #MA4127 3.500% 12/20/46		264,221		250,866
Pool #MA4262 3.500% 2/20/47		267,832		254,211
Pool #MA4382 3.500% 4/20/47		68,498		64,993
Pool #MA4719 3.500% 9/20/47		84,181		79,848
Pool #MA4837 3.500% 11/20/47		174,500		165,517
Pool #MA4900 3.500% 12/20/47		627,452		594,955
Pool #MA4653 4.000% 8/20/47		33,229		32,463
Pool #MA4838 4.000% 11/20/47		137,626		134,283
Pool #MA4901 4.000% 12/20/47		60,496		59,027
Pool #MA5078 4.000% 3/20/48		204,541		199,572
Pool #MA5466 4.000% 9/20/48		228,292		222,604
Pool #MA5399 4.500% 8/20/48		413,767		412,323
Pool #MA8347 4.500% 10/20/52		1,707,712		1,687,346
Pool #MA3666 5.000% 5/20/46		70,008		71,707
Pool #MA4199 5.000% 1/20/47		71,519		73,161
Pool #MA4454 5.000% 5/20/47		110,686		113,588
Pool #MA4722 5.000% 9/20/47		122,537		125,520
Government National Mortgage Association II, TBA
2.500% 10/20/54 (c)		4,850,000		4,272,053
4.000% 10/20/54 (c)		3,500,000		3,384,014
4.500% 10/20/54 (c)		3,150,000		3,109,882
5.000% 10/20/54 (c)		4,075,000		4,082,515
5.500% 10/20/54 (c)		2,450,000		2,473,730
Uniform Mortgage-Backed Security, TBA
2.000% 10/01/54 (c)		2,875,000		2,377,266
2.500% 10/01/54 (c)		3,500,000		3,020,254
3.000% 10/01/54 (c)		1,825,000		1,637,937
3.500% 10/01/54 (c)		6,900,000		6,427,511
4.000% 10/01/54 (c)		3,175,000		3,049,116
4.500% 10/01/54 (c)		3,875,000		3,809,458
5.000% 10/01/54 (c)		5,200,000		5,195,938
5.500% 10/01/54 (c)		4,525,000		4,577,851
				118,545,204
Whole Loans — 0.3%
Federal National Mortgage Association Connecticut Avenue Securities, Series 2022-R03, Class 1M2, 30 day USD SOFR Average + 3.500%
8.780% FRN 3/25/42 (b)		1,000,000		1,051,163

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $124,593,888)			$	122,515,233

U.S. TREASURY OBLIGATIONS — 40.1%
U.S. Treasury Bonds & Notes — 40.1%
U.S. Treasury Bonds
4.125% 8/15/44 (e)		18,555,000		18,409,980
4.250% 8/15/54		14,893,000		15,209,378
4.625% 5/15/44		1,100,000		1,166,020
U.S. Treasury Notes
3.375% 9/15/27		11,200,000		11,143,119
3.500% 9/30/26		14,200,000		14,160,074
3.500% 9/30/29		46,660,000		46,521,406
3.750% 8/31/26 (e)		1,824,000		1,826,810
3.875% 8/15/34		20,207,000		20,349,152
				128,785,939

TOTAL U.S. TREASURY OBLIGATIONS (Cost $128,504,639)				128,785,939

TOTAL BONDS & NOTES (Cost $368,358,458)				364,061,700


	Number of Shares
EQUITIES — 0.1%
COMMON STOCK — 0.1%
Communication Services — 0.1%
Intelsat SA (h)		7,225		222,624

TOTAL COMMON STOCK (Cost $676,994)				222,624

TOTAL EQUITIES (Cost $676,994)				222,624

TOTAL LONG-TERM INVESTMENTS (Cost $369,035,452)				364,284,324


SHORT-TERM INVESTMENTS — 4.9%
Investment of Cash Collateral from Securities Loaned — 2.2%
State Street Navigator Securities Lending Government Money Market Portfolio (i)		7,219,818		7,219,818

	Principal Amount
Repurchase Agreement — 2.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/30/24, 1.520%, due 10/01/24 (j)	$	8,785,957		8,785,957
U.S. Treasury Bill — 0.0%
U.S. Treasury Bills
5.301% 11/12/24 (e) (k)		25,000		24,863

MML Total Return Bond Fund — Portfolio of Investments (Continued)

	Principal Amount	Value
TOTAL SHORT-TERM INVESTMENTS (Cost $16,030,625)		$	16,030,638

TOTAL INVESTMENTS — 118.5% (Cost $385,066,077) (l)			380,314,962

Other Assets/(Liabilities) — (18.5)%			(59,309,055)

NET ASSETS — 100.0%		$	321,005,907

Abbreviation Legend

CLO	Collateralized Loan Obligation

CMT	Constant Maturity Treasury Index

FRN	Floating Rate Note

LIBOR

London InterBank Offered Rate

PIK	Payment in kind

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)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2024, these securities amounted to a value of $17,522 or 0.01% of net assets.

(b)

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

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

(e)

Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2024, was $18,735,464 or 5.84% of net assets. The Fund received $11,953,995 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)

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 September 30, 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)	Non-income producing security.

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

(j)	Maturity value of $8,786,328. Collateralized by U.S. Government Agency obligations with a rate of 4.875%, maturity date of 4/30/26, and an aggregate market value, including accrued interest, of $8,961,867.

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

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

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	10/02/24	EUR	101,085	USD	112,635	$	(112)
Bank of America N.A.	10/11/24	EUR	83,000	USD	90,089		2,335
Bank of America N.A.	10/11/24	USD	501,866	EUR	453,000		(2,570)
Bank of New York	10/11/24	USD	16,710	EUR	15,000		7
Citibank N.A.	10/11/24	EUR	714,000	USD	781,971		13,100
Citibank N.A.	10/11/24	USD	342,197	GBP	267,000		(14,768)
Citibank N.A.	10/11/24	USD	4,177,807	EUR	3,840,000		(98,213)
Goldman Sachs International	10/11/24	EUR	111,000	USD	120,522		3,082
Goldman Sachs International	10/11/24	USD	933,132	EUR	840,000		(2,247)
						$	(99,386)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Ultra 10 Year	12/19/24		6	$	707,775	$	2,006
U.S. Treasury Ultra Bond	12/19/24		2		266,784		(596)
U.S. Treasury Note 2 Year	12/31/24		430		89,304,988		239,153
						$	240,563
Short
Euro-BOBL	12/06/24		6	$	(794,848)	$	(6,954)
Euro-Bund	12/06/24		20		(2,985,764)		(17,958)
Euro-Buxl 30 Year Bond	12/06/24		3		(454,428)		(672)
UK Long Gilt	12/27/24		2		(265,685)		2,493
						$	(23,091)

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)

Fixed 3.520%

Annually

12-Month USD SOFR

Annually

12/20/53

USD

2,201,000

(81,647)

—

(81,647)

Currency Legend

EUR

Euro

GBP	British Pound

USD	U.S. Dollar

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MML Series Investment Fund (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 December 19, 1984, as restated May 14, 1993, and further amended and restated as of December 15, 2011, as it may be further amended from time to time. The Trust consists of the following series (each individually referred to as a ''Fund'' or collectively as the ''Funds''):

MML Conservative Allocation Fund ("Conservative Allocation Fund")

MML Balanced Allocation Fund ("Balanced Allocation Fund")

MML Moderate Allocation Fund ("Moderate Allocation Fund")

MML Growth Allocation Fund ("Growth Allocation Fund")

MML Aggressive Allocation Fund ("Aggressive Allocation Fund")

MML American Funds Growth Fund

MML American Funds Core Allocation Fund

MML Blue Chip Growth Fund ("Blue Chip Growth Fund")

MML Equity Income Fund ("Equity Income Fund")

MML Equity Index Fund ("Equity Index Fund")

MML Focused Equity Fund ("Focused Equity Fund")

MML Foreign Fund ("Foreign Fund")

MML Fundamental Equity Fund ("Fundamental Equity Fund")

MML Fundamental Value Fund ("Fundamental Value Fund")

MML Global Fund ("Global Fund")

MML Income & Growth Fund ("Income & Growth Fund")

MML International Equity Fund ("International Equity Fund")

MML Large Cap Growth Fund ("Large Cap Growth Fund")

MML Managed Volatility Fund ("Managed Volatility Fund")

MML Mid Cap Growth Fund ("Mid Cap Growth Fund")

MML Mid Cap Value Fund ("Mid Cap Value Fund")

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

MML Small Company Value Fund ("Small Company Value Fund")

MML Small/Mid Cap Value Fund ("Small/Mid Cap Value Fund")

MML Sustainable Equity Fund ("Sustainable Equity Fund")

MML Total Return Bond Fund ("Total Return Bond 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 Allocation Funds (as defined below), which are "funds of funds" series of the Trust, are the record owners of all of the outstanding shares of the Funds.

The Conservative Allocation Fund, Balanced Allocation Fund, Moderate Allocation Fund, Growth Allocation Fund, and Aggressive Allocation Fund (the "Allocation Funds") invest their investable assets in shares of series of the Trust and MML Series Investment Fund II advised by MML Investment Advisers, LLC ("MML Advisers") and non-affiliated mutual funds (together, the "MML Underlying Funds").

MML American Funds Growth Fund (the "Feeder Fund") invests all of its assets in Class 1 shares of the Growth Fund, a series of the American Funds Insurance Series (the "Master Fund"). The Master Fund is an open-end investment company and organized as a Massachusetts business trust. The Feeder Fund has an investment objective that is consistent with the Master Fund. The Master Fund intends to comply with the requirements under Subchapter M of the Internal Revenue Code of 1986, as amended (the "Code"), applicable to mutual funds and intends to distribute substantially all of its taxable income and capital gains to shareholders, which includes the Feeder Fund, to qualify as a regulated investment company. The performance of the Feeder Fund is directly affected by the performance of the Master Fund. The MML American Funds Core Allocation Fund invests all of its investable assets in shares of various series of American Funds Insurance Series, which are managed by Capital Research and Management Company (together, the "American Underlying Funds" and collectively with the MML Underlying Funds, the "Underlying Funds").

Notes to Portfolio of Investments (Unaudited) (Continued)

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 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 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 or an Underlying Fund or the Master Fund holds foreign securities that trade on days that foreign securities markets are open.

The net asset value of each of the Allocation Funds, Feeder Fund, and MML American Funds Core Allocation Fund is based upon the net asset value(s) of the Master Fund or Underlying Funds, as applicable. Shares of the Master Fund and Underlying Funds are valued at their closing net asset values as reported on each business day.

The Prospectuses and Statements of Additional Information ("SAIs") for the Underlying Funds and the Master Fund, as applicable, explain the valuation methods for the Underlying Funds and the Master Fund, including the circumstances under which the Underlying Funds or the Master Fund, may use fair value pricing and the effects of doing so. Such Prospectuses and SAIs are available on the Securities and Exchange Commission's ("SEC") EDGAR database on its website at http://www.sec.gov.

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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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 and certain Underlying Funds or the Master Fund 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.

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, but not limited to, 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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.

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 fair value factors, 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

The Focused Equity Fund and Small/Mid Cap Value Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of September 30, 2024. The Allocation Funds, Feeder Fund, and MML American Funds Core Allocation Fund characterized all investments at Level 1, as of September 30, 2024. For each Fund noted in the preceding sentences, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

The following is the aggregate value by input level, as of September 30, 2024, for the remaining Funds' investments:

Blue Chip Growth Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	484,501,264	$	1,013,621	$	504,593	$	486,019,478
Preferred Stock		—		—		1,082,625		1,082,625
Corporate Debt		—		1,170,844		—		1,170,844
Exchange-Traded Funds		7,461,039		—		—		7,461,039
Short-Term Investments		832,336		2,797,848		—		3,630,184
Total Investments	$	492,794,639	$	4,982,313	$	1,587,218	$	499,364,170

Equity Income Fund

Asset Investments
Common Stock	$	332,731,916	$	11,004,072	*	$	—	$	343,735,988
Preferred Stock		739,674		1,632,881	*		—		2,372,555
Short-Term Investments		1,324,864		2,408,642			—		3,733,506
Total Investments	$	334,796,454	$	15,045,595		$	—	$	349,842,049

Equity Index Fund

Asset Investments
Common Stock	$	637,647,869	$	—	$	—	$	637,647,869
Short-Term Investments		—		3,626,870		—		3,626,870
Total Investments	$	637,647,869	$	3,626,870	$	—	$	641,274,739

Asset Derivatives
Futures Contracts	$	77,647	$	—	$	—	$	77,647

Notes to Portfolio of Investments (Unaudited) (Continued)

Foreign Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Australia	$	—	$	7,903,926	$	—	$	7,903,926
Belgium		693,681		5,051,571		—		5,745,252
Brazil		—		426,071		—		426,071
Canada		981,511		—		—		981,511
China		—		1,522,368		—		1,522,368
Denmark		—		619,181		—		619,181
France		—		15,511,143		—		15,511,143
Germany		—		17,937,026		—		17,937,026
Hong Kong		—		2,238,058		—		2,238,058
Ireland		2,131,200		1,420,490		—		3,551,690
Israel		1,658,166		—		—		1,658,166
Italy		—		508,920		—		508,920
Japan		—		34,341,716		—		34,341,716
Luxembourg		—		2,653,282		—		2,653,282
Netherlands		—		5,657,672		—		5,657,672
Norway		—		1,597,634		—		1,597,634
Republic of Korea		—		2,365,028		—		2,365,028
Singapore		—		2,466,844		—		2,466,844
Sweden		—		5,151,083		—		5,151,083
Switzerland		—		4,561,446		—		4,561,446
United Kingdom		—		26,563,647		—		26,563,647
United States		4,792,720		16,502,162		—		21,294,882
Preferred Stock*
Germany		—		939,625		—		939,625
Short-Term Investments		5,415,947		9,884,221		—		15,300,168
Total Investments	$	15,673,225	$	165,823,114	$	—	$	181,496,339

Fundamental Equity Fund

Asset Investments
Common Stock	$	145,945,873	$	1,728,947	*	$	—	$	147,674,820
Short-Term Investments		—		1,164,323			—		1,164,323
Total Investments	$	145,945,873	$	2,893,270		$	—	$	148,839,143

Fundamental Value Fund

Asset Investments
Common Stock	$	175,611,009	$	—	$	—	$	175,611,009
Short-Term Investments		1,076,794		2,366,972		—		3,443,766
Total Investments	$	176,687,803	$	2,366,972	$	—	$	179,054,775

Notes to Portfolio of Investments (Unaudited) (Continued)

Global Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Austria	$	—	$	837,804	$	—	$	837,804
Canada		4,199,868		—		—		4,199,868
Denmark		—		1,038,088		—		1,038,088
France		—		11,535,005		—		11,535,005
Germany		—		4,281,902		—		4,281,902
Ireland		1,693,523		—		—		1,693,523
Israel		1,870,643		—		—		1,870,643
Japan		—		3,412,098		—		3,412,098
Mexico		294,031		—		—		294,031
Netherlands		—		2,807,238		—		2,807,238
Republic of Korea		—		1,125,308		—		1,125,308
Spain		—		4,562,251		—		4,562,251
Sweden		—		562,036		—		562,036
Switzerland		—		5,246,756		—		5,246,756
United Kingdom		—		10,319,419		—		10,319,419
United States		67,998,991		9,855,660		—		77,854,651
Short-Term Investments		2,373,175		818,751		—		3,191,926
Total Investments	$	78,430,231	$	56,402,316	$	—	$	134,832,547

Income & Growth Fund

Asset Investments
Common Stock	$	145,693,190	$	—	$	—	$	145,693,190
Short-Term Investments		2,921,792		2,385,737		—		5,307,529
Total Investments	$	148,614,982	$	2,385,737	$	—	$	151,000,719

Notes to Portfolio of Investments (Unaudited) (Continued)

International Equity Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Australia	$	—	$	3,261,965	$	—	$	3,261,965
Belgium		614,301		1,867,818		—		2,482,119
Canada		7,430,540		—		—		7,430,540
China		—		6,515,982		—		6,515,982
Denmark		—		6,892,319		—		6,892,319
France		—		37,462,761		—		37,462,761
Germany		—		33,709,114		—		33,709,114
Hong Kong		—		5,319,934		—		5,319,934
India		1,976,458		519,747		—		2,496,205
Indonesia		—		397,541		—		397,541
Ireland		—		1,540,991		—		1,540,991
Israel		1,666,842		—		—		1,666,842
Italy		3,337,108		5,604,993		—		8,942,101
Japan		—		28,886,142		—		28,886,142
Luxembourg		—		1,191,540		—		1,191,540
Netherlands		—		5,993,041		—		5,993,041
Portugal		—		1,227,879		—		1,227,879
Republic of Korea		—		2,433,478		—		2,433,478
Singapore		—		2,211,428		—		2,211,428
Spain		—		2,638,181		—		2,638,181
Sweden		—		2,410,403		—		2,410,403
Switzerland		—		18,789,946		—		18,789,946
Taiwan		3,119,982		—		—		3,119,982
United Kingdom		—		24,072,071		—		24,072,071
United States		4,998,242		18,681,785		—		23,680,027
Preferred Stock*
Republic of Korea		—		1,184,173		—		1,184,173
Short-Term Investments		529,301		3,733,059		—		4,262,360
Total Investments	$	23,672,774	$	216,546,291	$	—	$	240,219,065

Large Cap Growth Fund

Asset Investments
Common Stock	$	216,782,770	$	—	$	—	$	216,782,770
Short-Term Investments		2,057,060		1,736,758		—		3,793,818
Total Investments	$	218,839,830	$	1,736,758	$	—	$	220,576,588

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Volatility Fund

Asset Investments	Level 1			Level 2		Level 3			Total
Common Stock	$	101,150,260		$	—	$	—		$	101,150,260
Corporate Debt		—			—		—	+		—
Purchased Options		621,475			—		—			621,475
Rights		—			—		—	+		—
Short-Term Investments		—			1,663,797		—			1,663,797
Total Investments	$	101,771,735		$	1,663,797	$	—		$	103,435,532

Liability Derivatives
Written Options	$	(1,562,981	)	$	—	$	—		$	(1,562,981	)

Mid Cap Growth Fund

Asset Investments
Common Stock	$	324,206,619	$	—	$	—	$	324,206,619
Preferred Stock		—		—		784,288		784,288
Short-Term Investments		245,258		12,434,095		—		12,679,353
Total Investments	$	324,451,877	$	12,434,095	$	784,288	$	337,670,260

Mid Cap Value Fund

Asset Investments
Common Stock	$	242,610,688	$	21,385,729	*	$	—	$	263,996,417
Preferred Stock		—		1,945,775	*		—		1,945,775
Short-Term Investments		48,575		4,428,275			—		4,476,850
Total Investments	$	242,659,263	$	27,759,779		$	—	$	270,419,042

Asset Derivatives
Forward Contracts	$	—	$	3,343		$	—	$	3,343

Liability Derivatives
Forward Contracts	$	—	$	(20,795	)	$	—	$	(20,795	)

Small Cap Growth Equity Fund

Asset Investments
Common Stock	$	153,704,466	$	—	$	—	$	153,704,466
Exchange-Traded Funds		319,280		—		—		319,280
Short-Term Investments		175,878		2,371,004		—		2,546,882
Total Investments	$	154,199,624	$	2,371,004	$	—	$	156,570,628

Notes to Portfolio of Investments (Unaudited) (Continued)

Small Company Value Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	67,241,700	$	462,964	*	$	—	$	67,704,664
Short-Term Investments		359,706		567,272			—		926,978
Total Investments	$	67,601,406	$	1,030,236		$	—	$	68,631,642

Liability Derivatives
Forward Contracts	$	—	$	(2,375	)	$	—	$	(2,375	)

Sustainable Equity Fund

Asset Investments
Common Stock	$	146,171,111	$	1,704,904	*	$	—	$	147,876,015
Exchange-Traded Funds		198,426		—			—		198,426
Short-Term Investments		—		327,630			—		327,630
Total Investments	$	146,369,537	$	2,032,534		$	—	$	148,402,071

Asset Derivatives
Forward Contracts	$	—	$	2,168		$	—	$	2,168

Liability Derivatives
Forward Contracts	$	—	$	(260	)	$	—	$	(260	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Total Return Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	4,394,859		$	—	$	4,394,859
Corporate Debt		—			51,721,768			—		51,721,768
Municipal Obligations		—			2,424,339			—		2,424,339
Non-U.S. Government Agency Obligations		—			52,445,517			—		52,445,517
Sovereign Debt Obligations		—			1,774,045			—		1,774,045
U.S. Government Agency Obligations and Instrumentalities		—			122,515,233			—		122,515,233
U.S. Treasury Obligations		—			128,785,939			—		128,785,939
Common Stock		222,624			—			—		222,624
Short-Term Investments		7,219,818			8,810,820			—		16,030,638
Total Investments	$	7,442,442		$	372,872,520		$	—	$	380,314,962

Asset Derivatives
Forward Contracts	$	—		$	18,524		$	—	$	18,524
Futures Contracts		243,652			—			—		243,652
Total	$	243,652		$	18,524		$	—	$	262,176

Liability Derivatives
Forward Contracts	$	—		$	(117,910	)	$	—	$	(117,910	)
Futures Contracts		(26,180	)		—			—		(26,180	)
Swap Agreements		—			(81,647	)		—		(81,647	)
Total	$	(26,180	)	$	(199,557	)	$	—	$	(225,737	)

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 September 30, 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 SEC'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, other than the Allocation Funds, Feeder Fund, and MML American Funds Core Allocation 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 September 30, 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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 Global Fund invests a significant amount of its assets in foreign securities and each of the Foreign Fund and International Equity Fund invests substantially all of its assets in foreign securities. The other Funds, except for the Allocation Funds, Feeder Fund, and MML American Funds Core Allocation Fund, may also invest in foreign securities. In addition, certain Underlying Funds or the Master Fund 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.

Market Risk

The value of a Fund's portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock and bond markets can decline significantly in response to issuer, market, economic, industry, political, regulatory, geopolitical, public health, and other conditions, as well as investor perceptions of these conditions. A Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Federal Income Tax

It is each Fund's intent to continue to comply with the provisions of Subchapter M of the Code, 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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 September 30, 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)
Conservative Allocation Fund	$	271,492,349	$	6,790,540	$	(16,854,481	)	$	(10,063,941	)
Balanced Allocation Fund		323,886,604		10,956,800		(19,000,307	)		(8,043,507	)
Moderate Allocation Fund		1,096,928,941		43,323,036		(49,505,805	)		(6,182,769	)
Growth Allocation Fund		958,512,922		48,186,839		(37,051,658	)		11,135,181
Aggressive Allocation Fund		128,588,049		5,955,543		(2,772,686	)		3,182,857
MML American Funds Growth Fund		212,281,151		68,332,041		–			68,332,041
MML American Funds Core Allocation Fund		549,328,221		95,142,192		(18,999,181	)		76,143,011
Blue Chip Growth Fund		289,543,817		219,858,235		(10,037,882	)		209,820,353
Equity Income Fund		262,312,545		94,568,231		(7,038,727	)		87,529,504
Equity Index Fund		285,773,760		368,318,192		(12,817,213	)		355,500,979
Focused Equity Fund		221,698,708		61,874,789		(617,345	)		61,257,444
Foreign Fund		159,758,769		33,985,994		(12,248,424	)		21,737,570
Fundamental Equity Fund		110,620,445		39,974,258		(1,755,560	)		38,218,698
Fundamental Value Fund		139,066,766		41,032,138		(1,044,129	)		39,988,009
Global Fund		104,315,203		33,237,699		(2,720,355	)		30,517,344
Income & Growth Fund		117,390,910		35,998,784		(2,388,975	)		33,609,809
International Equity Fund		215,047,495		41,785,248		(16,613,678	)		25,171,570
Large Cap Growth Fund		147,779,593		81,315,342		(8,518,347	)		72,796,995
Managed Volatility Fund		56,830,250		48,964,274		(2,358,992	)		46,605,282
Mid Cap Growth Fund		262,515,284		85,377,712		(10,222,736	)		75,154,976
Mid Cap Value Fund		255,646,279		26,507,255		(11,734,492	)		14,772,763
Small Cap Growth Equity Fund		122,229,101		42,319,432		(7,977,905	)		34,341,527
Small Company Value Fund		64,218,670		9,501,207		(5,088,235	)		4,412,972
Small/Mid Cap Value Fund		122,685,306		21,571,757		(8,508,071	)		13,063,686
Sustainable Equity Fund		98,014,310		52,873,568		(2,485,807	)		50,387,761
Total Return Bond Fund		385,066,077		3,803,333		(8,554,448	)		(4,751,115	)

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 has evaluated ASU 2022-06 and there is no material impact on the financial statements.

MML Series Investment Fund NPORT-PMML Mid Cap Value Fund (Sep 2024 report)