MML Series Investment Fund II NPORT-P MML High Yield Fund (Sep 2023 report)

MML Blend Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Diversified Financial Services — 100.0%
iShares 5-10 Year Investment Grade Corporate Bond ETF (a)		493,930	$	24,029,694
iShares Core S&P 500 ETF		407,895		175,162,350
iShares Core S&P Mid-Cap ETF		53,906		13,441,461
iShares Core S&P Small-Cap ETF		61,060		5,759,790
iShares Core S&P Total US Stock Market ETF		2,042,515		192,384,488
iShares Core Total USD Bond Market ETF (a)		2,290,923		100,147,699
iShares Core U.S. Aggregate Bond ETF		1,061,338		99,808,226
iShares iBoxx High Yield Corporate Bond ETF (a)		335,938		24,765,349
TOTAL MUTUAL FUNDS (Cost $634,485,165)				635,499,057
TOTAL LONG-TERM INVESTMENTS (Cost $634,485,165)				635,499,057
SHORT-TERM INVESTMENTS — 3.9%
Investment of Cash Collateral from Securities Loaned — 3.9%
State Street Navigator Securities Lending Government Money Market Portfolio (b)		25,026,495		25,026,495
TOTAL SHORT-TERM INVESTMENTS (Cost $25,026,495)				25,026,495
TOTAL INVESTMENTS — 103.9% (Cost $659,511,660) (c)				660,525,552
Other Assets/(Liabilities) — (3.9)%				(24,907,528)
NET ASSETS — 100.0%			$	635,618,024

Abbreviation Legend

ETF Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $25,015,434 or 3.94% of net assets. The Fund received $510,195 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

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

MML Dynamic Bond Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 100.4%
BANK LOANS — 3.2%
Airlines — 0.1%
Air Canada, 2021 Term Loan B, 3 mo. USD Term SOFR + 3.500%
9.128% VRN 8/11/28	$	74,063	$	74,047
United Airlines, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.182% VRN 4/21/28		65,962		65,977
				140,024
Beverages — 0.1%
Triton Water Holdings, Inc., Term Loan, 3 mo. USD Term SOFR + 3.250%
8.902% VRN 3/31/28		216,778		210,997
Commercial Services — 0.1%
Allied Universal Holdco LLC, 2021 USD Incremental Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.166% VRN 5/12/28		228,088		219,975
Prime Security Services Borrower LLC, 2021 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.192% VRN 9/23/26		91,389		91,224
				311,199
Computers — 0.0%
Magenta Buyer LLC, 2021 USD 1st Lien Term Loan, 3 mo. USD Term SOFR + 5.000%
10.631% VRN 7/27/28		49,735		36,859
Peraton Corp., Term Loan B, 1 mo. USD Term SOFR + 3.750%
9.166% VRN 2/01/28		65,054		64,851
				101,710
Diversified Financial Services — 0.3%
Blackhawk Network Holdings, Inc., 2018 1st Lien Term Loan, 3 mo. USD Term SOFR + 2.750%
8.172% VRN 6/15/25		112,184		111,716
Castlelake Aviation Ltd., Term Loan B, 3 mo. USD Term SOFR + 2.750%
8.421% VRN 10/22/26		102,404		102,171
Citadel Securities LP, 2023 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.818% VRN 7/29/30		166,607		166,087
Deerfield Dakota Holding LLC, 2020 USD Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.140% VRN 4/09/27		76,508		74,516
Focus Financial Partners LLC, 2022 Term Loan B5, 1 mo. USD Term SOFR + 3.250%
8.566% VRN 6/30/28		108,900		108,522
				563,012

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Engineering & Construction — 0.1%
Brown Group Holding LLC, Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.068% VRN 6/07/28	$	275,481	$	272,668
Entertainment — 0.3%
Caesars Entertainment Corp., Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.666% VRN 2/06/30		19,900		19,887
PCI Gaming Authority, Term Loan, 1 mo. USD Term SOFR + 2.500%
7.931% VRN 5/29/26		260,000		259,644
Scientific Games International, Inc., 2022 USD Term Loan, 1 mo. USD Term SOFR + 3.000%
8.434% VRN 4/14/29		266,625		266,292
UFC Holdings LLC, 2021 Term Loan B, 3 mo. USD Term SOFR + 2.750%
8.369% VRN 4/29/26		143,516		143,288
				689,111
Health Care – Products — 0.3%
Medline Borrower LP, USD Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.681% VRN 10/23/28		291,623		290,661
Sotera Health Holdings LLC, 2021 Term Loan, 1 mo. USD Term SOFR + 2.750%
8.181% VRN 12/11/26		270,000		267,232
				557,893
Health Care – Services — 0.2%
Global Medical Response, Inc., 2020 Term Loan B, 3 mo. USD Term SOFR + 4.250%
9.780% VRN 10/02/25		265,899		184,268
ICON Luxembourg Sarl, LUX Term Loan, 3 mo. USD Term SOFR + 2.250%
7.902% VRN 7/03/28		48,282		48,243
Phoenix Guarantor, Inc., 2020 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.681% VRN 3/05/26		166,656		165,476
				397,987
Housewares — 0.1%
Solis IV BV, USD Term Loan B1, 3 mo. USD Term SOFR + 3.500%
8.891% VRN 2/26/29		126,550		123,039
Insurance — 0.2%
Acrisure LLC
2020 Term Loan B, 1 mo. USD LIBOR + 3.500%
8.931% VRN 2/15/27		120,011		118,168
2021 First Lien Term Loan B, 1 mo. USD LIBOR + 4.250%
9.681% VRN 2/15/27		122,813		122,276
AmWINS Group, Inc.
2021 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.681% VRN 2/19/28		37,686		37,425
2023 Incremental Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.181% VRN 2/19/28		29,775		29,719
Asurion LLC
2020 Term Loan B8, 3 mo. USD Term SOFR + 3.250%
8.681% VRN 12/23/26		150,738		147,346

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
2021 Term Loan B9, 3 mo. USD Term SOFR + 3.250%
8.681% VRN 7/31/27	$	73,308	$	70,742
				525,676
Leisure Time — 0.1%
Alterra Mountain Co., 2021 Series B-2 Consenting Term Loan, 1 mo. USD Term SOFR + 3.500%
8.931% VRN 8/17/28		156,765		156,243
Lodging — 0.1%
Station Casinos LLC, 2020 Term Loan B, 1 mo. USD Term SOFR + 2.250%
7.666% VRN 2/08/27		146,678		146,245
Machinery – Diversified — 0.1%
Ali Group North America Corp., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.431% VRN 7/30/29		99,144		99,006
Vertical US Newco, Inc., Term Loan B, 6 mo. USD Term SOFR + 3.500%
9.381% VRN 7/30/27		194,568		193,985
				292,991
Media — 0.1%
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 1 mo. USD Term SOFR + 2.500%
7.931% VRN 9/18/26		200,753		200,408
Pharmaceuticals — 0.2%
Gainwell Acquisition Corp., Term Loan B, 3 mo. USD Term SOFR + 4.000%
9.490% VRN 10/01/27		164,216		159,956
Jazz Financing Lux Sarl, USD Term Loan, 1 mo. USD Term SOFR + 3.500%
8.931% VRN 5/05/28		198,163		197,971
PRA Health Sciences, Inc., US Term Loan, 3 mo. USD Term SOFR + 2.250%
7.902% VRN 7/03/28		12,029		12,020
				369,947
Pipelines — 0.1%
CQP Holdco LP, 2021 Term Loan B, 1 mo. USD Term SOFR + 3.500%, 3 mo. USD Term SOFR + 3.500%
8.990% VRN 6/05/28		214,808		214,759
Private Equity — 0.2%
GTCR W Merger Sub LLC, USD Term Loan B,
0.000% 9/20/30 (a)		380,000		379,723
Retail — 0.2%
Great Outdoors Group LLC, 2021 Term Loan B1, 1 mo. USD Term SOFR + 3.750%
9.402% VRN 3/06/28		150,366		149,856
Harbor Freight Tools USA, Inc., 2021 Term Loan B, 1 mo. USD Term SOFR + 2.750%
8.181% VRN 10/19/27		345,976		342,986
Pilot Travel Centers LLC, 2021 Term Loan B, 1 mo. USD Term SOFR + 2.000%
7.416% VRN 8/04/28		18,207		18,175
				511,017

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Software — 0.1%
Athenahealth Group, Inc., 2022 Term Loan B, 1 mo. USD Term SOFR + 3.250%
8.568% VRN 2/15/29	$	151,672	$	148,592
The Ultimate Software Group, Inc., Term Loan B, 3 mo. USD Term SOFR + 3.750%
9.219% VRN 5/04/26		120,600		120,374
				268,966
Transportation — 0.2%
Genesee & Wyoming, Inc., Term Loan, 3 mo. USD Term SOFR + 2.000%
7.490% VRN 12/30/26		403,962		403,077
TOTAL BANK LOANS (Cost $6,921,573)				6,836,692
CORPORATE DEBT — 38.7%
Advertising — 0.0%
Clear Channel Outdoor Holdings, Inc.
7.500% 6/01/29 (b) (c)		95,000		72,640
Aerospace & Defense — 1.6%
Boeing Co.
2.196% 2/04/26		300,000		275,455
2.800% 3/01/27 (c)		290,000		262,484
2.950% 2/01/30		270,000		227,154
3.200% 3/01/29		300,000		263,461
3.250% 2/01/35		330,000		253,704
3.750% 2/01/50		140,000		95,112
5.705% 5/01/40		130,000		119,938
5.805% 5/01/50		300,000		271,655
5.930% 5/01/60		10,000		8,979
General Dynamics Corp.
4.250% 4/01/40		20,000		16,984
4.250% 4/01/50		50,000		41,081
L3Harris Technologies, Inc.
5.054% 4/27/45		80,000		69,648
Lockheed Martin Corp.
3.900% 6/15/32		50,000		44,842
4.150% 6/15/53		320,000		252,377
Northrop Grumman Corp.
2.930% 1/15/25		160,000		154,288
3.250% 1/15/28		290,000		265,954
5.150% 5/01/40		280,000		255,622
RTX Corp.
2.250% 7/01/30		110,000		88,503
3.030% 3/15/52		240,000		144,367
4.125% 11/16/28		160,000		149,193
4.500% 6/01/42		80,000		65,445
				3,326,246
Agriculture — 0.6%
Altria Group, Inc.
2.450% 2/04/32		140,000		105,613
4.400% 2/14/26		190,000		184,443
5.800% 2/14/39		240,000		222,502
5.950% 2/14/49		130,000		116,747

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
BAT Capital Corp.
3.462% 9/06/29	$	525,000	$	449,605
4.540% 8/15/47		130,000		89,484
Philip Morris International, Inc.
4.500% 3/20/42		80,000		63,846
				1,232,240
Airlines — 0.4%
Delta Air Lines, Inc./SkyMiles IP Ltd.
4.750% 10/20/28 (b)		550,000		522,689
Mileage Plus Holdings LLC/Mileage Plus Intellectual Property Assets Ltd.
6.500% 6/20/27 (b)		247,500		245,223
United Airlines, Inc.
4.625% 4/15/29 (b)		65,000		55,869
				823,781
Apparel — 0.2%
NIKE, Inc.
2.850% 3/27/30		280,000		242,541
3.250% 3/27/40		130,000		98,455
3.375% 3/27/50 (c)		40,000		28,541
				369,537
Auto Manufacturers — 1.1%
Ford Motor Co.
3.250% 2/12/32		1,660,000		1,279,301
6.100% 8/19/32 (c)		90,000		84,772
General Motors Co.
5.600% 10/15/32 (c)		125,000		116,707
General Motors Financial Co., Inc.
2.400% 10/15/28		275,000		227,986
Hyundai Capital America
1.800% 10/15/25 (b)		55,000		50,573
Nissan Motor Co. Ltd.
3.522% 9/17/25 (b)		410,000		387,228
4.345% 9/17/27 (b)		300,000		273,840
				2,420,407
Banks — 11.1%
ABN AMRO Bank NV
4.750% 7/28/25 (b)		260,000		251,852
Banco Santander SA
3.496% 3/24/25		600,000		576,717
Bank of America Corp.
5 yr. CMT + 1.200% 2.482% VRN 9/21/36		520,000		378,392
Secured Overnight Financing Rate + 1.210% 2.572% VRN 10/20/32		190,000		145,995
Secured Overnight Financing Rate + 1.330% 2.972% VRN 2/04/33		670,000		528,332
3 mo. USD Term SOFR + 1.632% 3.593% VRN 7/21/28		1,540,000		1,406,348
4.000% 1/22/25		700,000		681,188
3 mo. USD Term SOFR + 3.412% 4.083% VRN 3/20/51		220,000		162,699
4.200% 8/26/24		380,000		373,347
3 mo. USD Term SOFR + 3.967% 6.250% VRN (c) (d)		170,000		167,252
Bank of Montreal 5 yr. USD Swap + 1.432%
3.803% VRN 12/15/32		70,000		61,144
Bank of Nova Scotia 5 yr. CMT + 2.050%
4.588% VRN 5/04/37		180,000		150,021

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
BNP Paribas SA
Secured Overnight Financing Rate + 2.074% 2.219% VRN 6/09/26 (b)	$	200,000	$	186,642
Secured Overnight Financing Rate + 1.507% 3.052% VRN 1/13/31 (b)		390,000		321,033
4.625% 3/13/27 (b)		260,000		246,506
1 yr. CMT + 1.450% 5.125% VRN 1/13/29 (b)		350,000		337,918
5 yr. CMT + 4.354% 8.500% VRN (b) (d)		200,000		195,665
BPCE SA
1.000% 1/20/26 (b)		250,000		223,570
Citigroup, Inc.
Secured Overnight Financing Rate + 0.694% 2.014% VRN 1/25/26		95,000		89,709
Secured Overnight Financing Rate + 1.280% 3.070% VRN 2/24/28		845,000		766,500
Secured Overnight Financing Rate + 1.939% 3.785% VRN 3/17/33		580,000		483,856
3 mo. USD Term SOFR + 1.600% 3.980% VRN 3/20/30		760,000		682,544
4.650% 7/30/45		380,000		305,288
3 mo. USD Term SOFR + 4.167% 5.950% VRN (d)		160,000		152,663
Cooperatieve Rabobank UA
4.375% 8/04/25		470,000		453,546
Credit Agricole SA Secured Overnight Financing Rate + 1.676%
1.907% VRN 6/16/26 (b)		270,000		250,998
Credit Suisse AG
7.500% 2/15/28		350,000		366,109
7.950% 1/09/25		290,000		295,128
Danske Bank AS
5.375% 1/12/24 (b)		240,000		239,039
Goldman Sachs Group, Inc.
Secured Overnight Financing Rate + 1.472% 2.908% VRN 7/21/42		240,000		155,000
3.000% 3/15/24		400,000		394,498
3.500% 11/16/26		270,000		251,104
3 mo. USD Term SOFR + 1.563% 4.223% VRN 5/01/29		500,000		462,514
4.250% 10/21/25		200,000		192,733
4.750% 10/21/45		70,000		58,907
5.150% 5/22/45		290,000		248,506
Secured Overnight Financing Rate + 0.820% 6.164% FRN 9/10/27		165,000		161,969
3 mo. USD Term SOFR + 1.432% 6.796% FRN 5/15/26		555,000		558,413
HSBC Holdings PLC
Secured Overnight Financing Rate + 1.929% 2.099% VRN 6/04/26		510,000		475,354
3 mo. USD Term SOFR + 1.642% 7.052% FRN 9/12/26		310,000		312,803
JP Morgan Chase & Co.
Secured Overnight Financing Rate + 1.015% 2.069% VRN 6/01/29		215,000		181,161
Secured Overnight Financing Rate + 2.040% 2.522% VRN 4/22/31		320,000		259,385
3 mo. USD Term SOFR + 1.250% 2.580% VRN 4/22/32		270,000		212,983
Secured Overnight Financing Rate + 0.915% 2.595% VRN 2/24/26		160,000		152,325
Secured Overnight Financing Rate + 1.260% 2.963% VRN 1/25/33		25,000		19,903
Secured Overnight Financing Rate + 2.440% 3.109% VRN 4/22/51		110,000		68,297
3.875% 9/10/24		540,000		528,902
3 mo. USD Term SOFR + 1.592% 4.452% VRN 12/05/29		640,000		597,413
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205%
3.574% VRN 11/07/28		200,000		178,646
Mitsubishi UFJ Financial Group, Inc.
1.412% 7/17/25		235,000		216,793
Morgan Stanley
Secured Overnight Financing Rate + 1.360% 2.484% VRN 9/16/36		520,000		377,721
Secured Overnight Financing Rate + 1.290% 2.943% VRN 1/21/33		115,000		90,563
Secured Overnight Financing Rate + 1.160% 3.620% VRN 4/17/25		150,000		147,638
Secured Overnight Financing Rate + 1.610% 4.210% VRN 4/20/28		205,000		192,758
National Securities Clearing Corp.
1.500% 4/23/25 (b)		250,000		234,598

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
NatWest Markets PLC
0.800% 8/12/24 (b)	$	200,000	$	191,182
PNC Financial Services Group, Inc.
Secured Overnight Financing Rate + 1.841% 5.582% VRN 6/12/29		210,000		203,724
Secured Overnight Financing Rate + 1.322% 5.812% VRN 6/12/26		60,000		59,521
Royal Bank of Canada
1.150% 6/10/25		310,000		286,668
Santander Holdings USA, Inc. Secured Overnight Financing Rate + 1.249%
2.490% VRN 1/06/28		135,000		117,217
Toronto-Dominion Bank
1.150% 6/12/25		300,000		277,733
Truist Financial Corp. Secured Overnight Financing Rate + 2.050%
6.047% VRN 6/08/27		120,000		118,695
UBS Group AG
Secured Overnight Financing Rate + 2.044% 2.193% VRN 6/05/26 (b)		480,000		446,428
Secured Overnight Financing Rate + 1.730% 3.091% VRN 5/14/32 (b)		390,000		308,041
4.253% 3/23/28 (b)		340,000		312,560
Secured Overnight Financing Rate + 3.920% 6.537% VRN 8/12/33 (b)		300,000		296,494
5 yr. USD Swap + 4.344% 7.000% VRN (b) (d)		500,000		492,689
US Bancorp
1.450% 5/12/25		210,000		195,890
Secured Overnight Financing Rate + 0.730% 2.215% VRN 1/27/28		20,000		17,644
Secured Overnight Financing Rate + 2.020% 5.775% VRN 6/12/29		140,000		136,273
Secured Overnight Financing Rate + 2.260% 5.836% VRN 6/12/34		40,000		37,726
Wells Fargo & Co.
Secured Overnight Financing Rate + 2.000% 2.188% VRN 4/30/26		200,000		187,787
3 mo. USD Term SOFR + 1.432% 2.879% VRN 10/30/30		235,000		195,627
3.000% 10/23/26		430,000		394,909
3 mo. USD Term SOFR + 1.432% 3.196% VRN 6/17/27		245,000		227,512
Secured Overnight Financing Rate + 1.500% 3.350% VRN 3/02/33		360,000		291,004
Secured Overnight Financing Rate + 2.130% 4.611% VRN 4/25/53		1,970,000		1,542,384
				23,548,596
Beverages — 0.4%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
3.650% 2/01/26		260,000		249,693
Anheuser-Busch InBev Worldwide, Inc.
3.500% 6/01/30		130,000		115,662
4.600% 4/15/48		334,000		282,299
Coca-Cola Co.
2.600% 6/01/50		80,000		48,914
Molson Coors Beverage Co.
3.000% 7/15/26		50,000		46,468
4.200% 7/15/46		50,000		37,603
PepsiCo, Inc.
1.625% 5/01/30		170,000		136,569
				917,208
Biotechnology — 0.1%
Gilead Sciences, Inc.
3.700% 4/01/24		130,000		128,577
Chemicals — 0.4%
MEGlobal BV
4.250% 11/03/26 (b)		240,000		227,808
OCP SA
3.750% 6/23/31 (b)		260,000		204,858

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.125% 6/23/51 (b)	$	220,000	$	145,200
Orbia Advance Corp. SAB de CV
2.875% 5/11/31 (b)		490,000		381,354
				959,220
Commercial Services — 0.4%
Cintas Corp. No. 2
3.700% 4/01/27		160,000		151,670
DP World Ltd.
5.625% 9/25/48 (b)		330,000		292,050
PayPal Holdings, Inc.
1.650% 6/01/25 (c)		270,000		252,653
Triton Container International Ltd.
1.150% 6/07/24 (b)		90,000		86,609
Triton Container International Ltd./TAL International Container Corp.
3.250% 3/15/32		160,000		119,651
				902,633
Cosmetics & Personal Care — 0.2%
Haleon US Capital LLC
3.375% 3/24/29		260,000		233,156
Kenvue, Inc.
4.900% 3/22/33 (b)		140,000		133,798
Procter & Gamble Co.
3.000% 3/25/30		100,000		88,834
				455,788
Distribution & Wholesale — 0.0%
H&E Equipment Services, Inc.
3.875% 12/15/28 (b)		30,000		25,617
Diversified Financial Services — 1.2%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.450% 10/29/26		170,000		152,268
3.000% 10/29/28		160,000		137,196
3.150% 2/15/24		190,000		187,832
3.400% 10/29/33		420,000		324,879
Air Lease Corp.
1.875% 8/15/26		170,000		151,036
5.300% 2/01/28		120,000		115,937
American Express Co.
3.375% 5/03/24		30,000		29,537
4.050% 5/03/29		140,000		130,299
Aviation Capital Group LLC
1.950% 9/20/26 (b)		395,000		344,854
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (b) (c)		370,000		329,553
Charles Schwab Corp.
5.875% 8/24/26		260,000		259,144
Secured Overnight Financing Rate + 2.010% 6.136% VRN 8/24/34 (c)		50,000		48,638
CI Financial Corp.
4.100% 6/15/51		115,000		66,563
Mastercard, Inc.
3.850% 3/26/50		50,000		38,507
Nasdaq, Inc.
3.950% 3/07/52		45,000		31,407

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Visa, Inc.
4.300% 12/14/45	$	160,000	$	135,394
				2,483,044
Electric — 0.6%
Consolidated Edison Co. of New York, Inc.
3.350% 4/01/30		70,000		61,452
3.950% 4/01/50		50,000		36,934
Duke Energy Carolinas LLC
2.850% 3/15/32		35,000		28,567
Duke Energy Corp.
3.950% 8/15/47		65,000		45,762
Duke Energy Ohio, Inc.
3.650% 2/01/29		140,000		128,408
Exelon Corp.
4.100% 3/15/52		65,000		47,007
Monongahela Power Co.
5.400% 12/15/43 (b)		145,000		128,179
Pacific Gas & Electric Co.
2.500% 2/01/31		185,000		140,744
Sierra Pacific Power Co.
2.600% 5/01/26		760,000		706,780
				1,323,833
Entertainment — 0.2%
Warnermedia Holdings, Inc.
3.755% 3/15/27		250,000		230,804
4.279% 3/15/32		240,000		203,717
5.050% 3/15/42		20,000		15,468
6.412% 3/15/26		10,000		9,998
				459,987
Food — 0.4%
Danone SA
2.589% 11/02/23 (b)		320,000		319,118
Mars, Inc.
2.700% 4/01/25 (b)		140,000		134,108
3.200% 4/01/30 (b)		80,000		70,180
Mondelez International, Inc.
1.500% 5/04/25		390,000		364,859
				888,265
Forest Products & Paper — 0.2%
Suzano Austria GmbH
3.125% 1/15/32		80,000		61,440
3.750% 1/15/31		430,000		353,450
				414,890
Gas — 0.2%
Brooklyn Union Gas Co.
4.487% 3/04/49 (b)		435,000		306,012
East Ohio Gas Co.
3.000% 6/15/50 (b)		45,000		25,864
				331,876

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Health Care – Products — 0.1%
Abbott Laboratories
4.750% 11/30/36	$	80,000	$	76,004
4.900% 11/30/46		100,000		91,039
				167,043
Health Care – Services — 0.7%
Centene Corp.
2.500% 3/01/31		285,000		218,942
Elevance Health, Inc.
2.375% 1/15/25		210,000		200,527
3.650% 12/01/27		140,000		129,766
HCA, Inc.
4.125% 6/15/29		220,000		199,162
Health Care Service Corp. A Mutual Legal Reserve Co.
3.200% 6/01/50 (b)		145,000		92,442
Humana, Inc.
4.625% 12/01/42		140,000		114,087
UnitedHealth Group, Inc.
1.250% 1/15/26		110,000		100,225
2.300% 5/15/31		220,000		177,747
3.875% 8/15/59		240,000		170,731
4.000% 5/15/29		100,000		93,587
4.200% 5/15/32		80,000		73,018
				1,570,234
Home Builders — 0.1%
Lennar Corp.
4.500% 4/30/24		100,000		99,050
4.750% 11/29/27		40,000		38,533
				137,583
Insurance — 0.4%
Athene Global Funding Secured Overnight Financing Rate Index + 0.560%
5.902% FRN 8/19/24 (b)		465,000		460,443
Berkshire Hathaway Finance Corp.
2.850% 10/15/50		150,000		93,325
3.850% 3/15/52		90,000		67,132
New York Life Global Funding
0.950% 6/24/25 (b)		100,000		92,031
Principal Life Global Funding II
1.250% 6/23/25 (b)		110,000		101,459
Teachers Insurance & Annuity Association of America
4.900% 9/15/44 (b)		80,000		67,327
				881,717
Internet — 0.8%
Alphabet, Inc.
1.900% 8/15/40		100,000		62,536
2.050% 8/15/50		60,000		32,758
Amazon.com, Inc.
3.150% 8/22/27		430,000		399,969
3.600% 4/13/32		470,000		416,771
3.875% 8/22/37		190,000		162,191
3.950% 4/13/52		200,000		154,589

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Prosus NV
3.061% 7/13/31 (b)	$	370,000	$	274,709
3.832% 2/08/51 (b)		210,000		115,983
4.027% 8/03/50 (b)		310,000		177,494
				1,797,000
Iron & Steel — 0.1%
Vale Overseas Ltd.
6.875% 11/21/36		170,000		171,050
Lodging — 0.6%
Las Vegas Sands Corp.
3.200% 8/08/24		860,000		832,016
Sands China Ltd.
5.375% STEP 8/08/25		390,000		377,792
				1,209,808
Machinery – Diversified — 0.2%
Deere & Co.
3.750% 4/15/50 (c)		260,000		205,372
Otis Worldwide Corp.
2.056% 4/05/25		140,000		132,173
				337,545
Media — 2.0%
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 1/15/34 (b)		65,000		47,858
4.500% 6/01/33 (b)		810,000		619,763
4.750% 3/01/30 (b)		105,000		88,142
Charter Communications Operating LLC/Charter Communications Operating Capital
3.500% 3/01/42		240,000		148,312
4.200% 3/15/28		560,000		513,990
4.400% 4/01/33 (c)		290,000		246,656
4.908% 7/23/25		240,000		234,517
5.250% 4/01/53 (c)		400,000		299,001
5.500% 4/01/63		150,000		110,962
Comcast Corp.
2.887% 11/01/51		550,000		324,137
3.400% 4/01/30		525,000		463,085
3.750% 4/01/40		120,000		92,957
3.950% 10/15/25		155,000		150,388
4.150% 10/15/28		270,000		255,759
CSC Holdings LLC
6.500% 2/01/29 (b)		700,000		579,905
DISH DBS Corp.
5.125% 6/01/29		60,000		33,263
5.750% 12/01/28 (b)		70,000		53,813
Fox Corp.
5.476% 1/25/39		90,000		77,781
				4,340,289
Mining — 0.8%
Anglo American Capital PLC
4.750% 4/10/27 (b)		230,000		220,430
Barrick North America Finance LLC
5.700% 5/30/41		80,000		76,611

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.750% 5/01/43	$	80,000	$	76,975
BHP Billiton Finance USA Ltd.
5.000% 9/30/43		100,000		90,181
First Quantum Minerals Ltd.
8.625% 6/01/31 (b)		200,000		199,036
Freeport-McMoRan, Inc.
4.625% 8/01/30		120,000		108,117
5.450% 3/15/43		230,000		196,097
Glencore Funding LLC
1.625% 4/27/26 (b)		240,000		216,107
3.375% 9/23/51 (b)		45,000		27,010
4.000% 3/27/27 (b)		140,000		131,412
4.125% 3/12/24 (b)		230,000		228,019
Southern Copper Corp.
5.250% 11/08/42		250,000		216,137
				1,786,132
Miscellaneous - Manufacturing — 0.2%
3M Co.
3.050% 4/15/30 (c)		290,000		250,677
3.700% 4/15/50		180,000		128,324
				379,001
Multi-National — 0.6%
Inter-American Development Bank
7.349% 10/06/30 INR (e) (f)		104,000,000		1,241,819
Oil & Gas — 3.1%
BP Capital Markets America, Inc.
2.939% 6/04/51		175,000		106,848
3.001% 3/17/52		230,000		141,046
3.119% 5/04/26		410,000		387,450
3.633% 4/06/30		120,000		108,051
Chesapeake Energy Corp.
5.875% 2/01/29 (b)		100,000		94,095
Chevron Corp.
1.995% 5/11/27		440,000		394,307
Continental Resources, Inc.
2.268% 11/15/26 (b)		195,000		172,760
5.750% 1/15/31 (b)		250,000		234,864
Coterra Energy, Inc.
3.900% 5/15/27		230,000		215,988
4.375% 3/15/29		220,000		203,462
Devon Energy Corp.
5.000% 6/15/45		390,000		314,105
5.600% 7/15/41		140,000		123,853
5.850% 12/15/25		120,000		119,390
Diamondback Energy, Inc.
3.250% 12/01/26		140,000		130,894
3.500% 12/01/29		160,000		141,978
Ecopetrol SA
5.875% 5/28/45		770,000		507,399
EOG Resources, Inc.
3.900% 4/01/35		200,000		169,583
4.375% 4/15/30		60,000		56,560
4.950% 4/15/50		40,000		35,390

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Exxon Mobil Corp.
3.043% 3/01/26	$	130,000	$	123,278
3.482% 3/19/30		190,000		171,565
4.227% 3/19/40		205,000		174,654
4.327% 3/19/50		20,000		16,420
KazMunayGas National Co. JSC
5.375% 4/24/30 (b)		200,000		181,566
Marathon Petroleum Corp.
5.125% 12/15/26		185,000		182,044
Occidental Petroleum Corp.
6.125% 1/01/31		85,000		83,780
6.450% 9/15/36		50,000		49,097
6.600% 3/15/46 (c)		160,000		157,213
6.625% 9/01/30 (c)		60,000		60,795
Petrobras Global Finance BV
5.999% 1/27/28 (c)		760,000		754,159
Pioneer Natural Resources Co.
1.900% 8/15/30		170,000		133,374
Reliance Industries Ltd.
3.625% 1/12/52 (b)		330,000		210,369
Shell International Finance BV
2.750% 4/06/30		240,000		206,415
2.875% 5/10/26		130,000		122,631
3.250% 4/06/50		330,000		219,118
Southwestern Energy Co.
4.750% 2/01/32		70,000		60,080
5.375% 2/01/29		75,000		69,074
				6,633,655
Oil & Gas Services — 0.1%
Halliburton Co.
2.920% 3/01/30		105,000		89,426
5.000% 11/15/45		100,000		84,768
				174,194
Pharmaceuticals — 2.9%
AbbVie, Inc.
2.600% 11/21/24		880,000		848,373
2.950% 11/21/26		260,000		241,283
3.200% 11/21/29		600,000		529,469
4.700% 5/14/45		25,000		21,297
Bausch Health Cos., Inc.
6.125% 2/01/27 (b) (c)		50,000		31,098
Becton Dickinson & Co.
3.363% 6/06/24		80,000		78,587
Bristol-Myers Squibb Co.
4.350% 11/15/47		220,000		178,171
Cigna Group
4.125% 11/15/25		100,000		96,820
4.375% 10/15/28		760,000		719,119
4.900% 12/15/48		230,000		193,826
CVS Health Corp.
2.125% 9/15/31		330,000		252,369
4.250% 4/01/50		70,000		51,790
4.300% 3/25/28		580,000		548,918
5.050% 3/25/48		220,000		182,786
Johnson & Johnson
3.625% 3/03/37		320,000		269,673

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Merck & Co., Inc.
1.450% 6/24/30	$	120,000	$	94,017
Pfizer, Inc.
1.700% 5/28/30		280,000		224,477
Teva Pharmaceutical Finance Netherlands III BV
3.150% 10/01/26		1,700,000		1,515,160
				6,077,233
Pipelines — 3.2%
Cameron LNG LLC
3.302% 1/15/35 (b)		150,000		119,403
Columbia Pipelines Operating Co. LLC
6.036% 11/15/33 (b)		260,000		253,787
6.544% 11/15/53 (b)		60,000		58,658
Energy Transfer LP
3.900% 7/15/26		710,000		671,968
4.750% 1/15/26		240,000		233,528
6.250% 4/15/49		320,000		293,607
Enterprise Products Operating LLC
4.150% 10/16/28		1,030,000		965,658
EQM Midstream Partners LP
4.750% 1/15/31 (b)		140,000		120,503
Kinder Morgan Energy Partners LP
6.950% 1/15/38		355,000		365,388
Kinder Morgan, Inc.
4.300% 3/01/28		110,000		103,526
MPLX LP
4.700% 4/15/48		400,000		303,199
ONEOK, Inc.
5.550% 11/01/26		40,000		39,739
5.800% 11/01/30		70,000		68,533
6.050% 9/01/33		160,000		157,189
6.625% 9/01/53		200,000		195,841
Targa Resources Corp.
4.950% 4/15/52		40,000		30,765
5.200% 7/01/27		170,000		166,587
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31		140,000		125,391
Tennessee Gas Pipeline Co. LLC
2.900% 3/01/30 (b)		30,000		25,061
Western Midstream Operating LP
3.100% STEP 2/01/25		240,000		229,618
4.050% STEP 2/01/30		900,000		786,683
5.250% STEP 2/01/50		1,660,000		1,293,197
Williams Cos., Inc.
3.500% 10/15/51		125,000		79,722
3.750% 6/15/27		250,000		232,445
				6,919,996
Real Estate Investment Trusts (REITS) — 0.1%
Crown Castle, Inc.
3.300% 7/01/30		35,000		29,540
WEA Finance LLC/Westfield UK & Europe Finance PLC
3.750% 9/17/24 (b)		220,000		211,603
				241,143

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Retail — 0.6%
Costco Wholesale Corp.
1.375% 6/20/27	$	190,000	$	166,087
1.600% 4/20/30		110,000		88,327
Home Depot, Inc.
2.700% 4/15/30		70,000		59,778
3.300% 4/15/40		120,000		89,425
3.350% 4/15/50		260,000		177,208
Lowe's Cos., Inc.
4.500% 4/15/30		50,000		46,655
McDonald's Corp.
3.500% 7/01/27		300,000		280,968
3.600% 7/01/30		190,000		169,623
4.450% 3/01/47		150,000		122,181
Walmart, Inc.
1.500% 9/22/28		80,000		67,846
1.800% 9/22/31		40,000		31,481
				1,299,579
Semiconductors — 0.7%
Broadcom, Inc.
3.419% 4/15/33 (b)		396,000		316,743
Intel Corp.
1.600% 8/12/28		190,000		160,645
3.050% 8/12/51		100,000		60,789
5.125% 2/10/30		90,000		88,315
Micron Technology, Inc.
5.875% 2/09/33		60,000		57,316
NVIDIA Corp.
2.850% 4/01/30		90,000		78,520
3.500% 4/01/40		240,000		188,957
3.500% 4/01/50		40,000		29,154
3.700% 4/01/60		170,000		124,338
NXP BV/NXP Funding LLC/NXP USA, Inc.
3.875% 6/18/26		245,000		232,940
Texas Instruments, Inc.
1.750% 5/04/30		110,000		89,020
				1,426,737
Software — 0.2%
Microsoft Corp.
2.921% 3/17/52		260,000		170,536
3.041% 3/17/62		70,000		44,318
Oracle Corp.
3.850% 4/01/60		340,000		216,212
4.650% 5/06/30		20,000		18,704
				449,770
Telecommunications — 1.7%
AT&T, Inc.
2.750% 6/01/31		160,000		128,000
3.500% 9/15/53		309,000		190,915
3.550% 9/15/55		215,000		131,614
T-Mobile USA, Inc.
2.250% 2/15/26		205,000		188,716
2.550% 2/15/31		60,000		47,743

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
3.375% 4/15/29	$	50,000	$	43,977
3.400% 10/15/52		230,000		143,668
3.500% 4/15/25		350,000		337,718
3.500% 4/15/31		700,000		591,898
3.875% 4/15/30		430,000		380,968
Telefonica Emisiones SA
5.213% 3/08/47		150,000		119,470
Verizon Communications, Inc.
2.650% 11/20/40		15,000		9,495
3.850% 11/01/42		610,000		450,811
3.875% 2/08/29		550,000		503,661
3.875% 3/01/52		435,000		306,240
				3,574,894
Transportation — 0.2%
Union Pacific Corp.
2.150% 2/05/27		50,000		45,134
2.891% 4/06/36		270,000		204,460
3.750% 7/15/25		70,000		67,796
3.750% 2/05/70		150,000		100,249
3.839% 3/20/60		120,000		84,101
				501,740
TOTAL CORPORATE DEBT (Cost $91,441,694)				82,402,547
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 11.5%
Commercial Mortgage-Backed Securities — 5.4%
Bank
Series 2020-BN28, Class AS, 2.140% 3/15/63		380,000		287,661
Series 2022-BNK39, Class AS, 3.181% 2/15/55		302,000		228,150
Series 2017-BNK8, Class A3, 3.229% 11/15/50		266,500		242,071
Benchmark Mortgage Trust
Series 2020-B19, Class AS, 2.148% 9/15/53		380,000		274,559
Series 2020-B18, Class AGNF, 4.139% 7/15/53 (b)		378,000		328,962
BPR Trust
Series 2021-TY, Class A, 1 mo. USD Term SOFR + 1.164% 6.498% FRN 9/15/38 (b)		550,000		528,314
Series 2022-OANA, Class A, 1 mo. USD Term SOFR + 1.898% 7.230% FRN 4/15/37 (b)		460,000		451,661
BX Commercial Mortgage Trust
Series 2021-ACNT, Class A, 1 mo. USD Term SOFR + 0.964% 6.297% FRN 11/15/38 (b)		120,000		117,712
Series 2021-VOLT, Class F, 1 mo. USD Term SOFR + 2.514% 7.847% FRN 9/15/36 (b)		405,000		380,444
Series 2021-21M, Class H, 1 mo. USD Term SOFR + 4.124% 9.457% FRN 10/15/36 (b)		295,025		276,244
BX Trust
Series 2019-OC11, Class E, 4.076% VRN 12/09/41 (b) (g)		374,000		298,067
Series 2023-DELC, Class A, 1 mo. USD Term SOFR + 2.690% 8.022% FRN 5/15/38 (b)		440,000		440,551
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA,
1.139% VRN 1/10/48 (g)		5,183,112		91,448
Citigroup Commercial Mortgage Trust
Series 2019-GC41, Class B, 3.199% 8/10/56		163,000		126,496
Series 2020-420K, Class D, 3.422% VRN 11/10/42 (b) (g)		200,000		141,562
Series 2020-420K, Class E, 3.422% VRN 11/10/42 (b) (g)		200,000		133,934

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2017-C4, Class B, 4.096% VRN 10/12/50 (g)	$	340,000	$	292,584
CSAIL Commercial Mortgage Trust
Series 2015-C1, Class XA, 0.948% VRN 4/15/50 (g)		7,611,183		47,470
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		264,931
CSMC Trust, Series 2021-B33, Class B,
3.766% VRN 10/10/43 (b) (g)		300,000		213,982
Extended Stay America Trust, Series 2021-ESH, Class A, 1 mo. USD Term SOFR + 1.194%
6.527% FRN 7/15/38 (b)		342,176		340,999
GS Mortgage Securities Corp. Trust, Series 2018-RIVR, Class C, 1 mo. USD Term SOFR + 1.547%
6.880% FRN 7/15/35 (b)		167,000		108,310
GS Mortgage Securities Trust
Series 2015-GS1, Class XA, 0.903% VRN 11/10/48 (g)		7,546,221		98,477
Series 2014-GC26, Class D, 4.662% VRN 11/10/47 (b) (g)		763,000		480,803
HPLY Trust, Series 2019-HIT, Class F, 1 mo. USD Term SOFR + 3.264%
8.593% FRN 11/15/36 (b)		385,138		370,889
JP Morgan Chase Commercial Mortgage Securities Trust
Series 2015-JP1, Class XA, 1.043% VRN 1/15/49 (g)		3,316,371		51,375
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		146,267
JPMBB Commercial Mortgage Securities Trust
Series 2015-C30, Class XA, 0.564% VRN 7/15/48 (g)		7,714,689		48,697
Series 2015-C29, Class XA, 0.691% VRN 5/15/48 (g)		5,354,383		37,684
Series 2014-C25, Class XA, 0.945% VRN 11/15/47 (g)		3,525,719		20,335
Series 2015-C28, Class XA, 1.058% VRN 10/15/48 (g)		5,780,393		62,433
Series 2015-C27, Class D, 3.940% VRN 2/15/48 (b) (g)		704,000		425,538
Series 2015-C28, Class B, 3.986% 10/15/48		340,000		312,396
Series 2014-C23, Class D, 4.129% VRN 9/15/47 (b) (g)		391,000		323,435
Series 2013-C17, Class C, 5.032% VRN 1/15/47 (g)		400,000		353,124
Med Trust, Series 2021-MDLN, Class D, 1 mo. USD Term SOFR + 2.114%
7.447% FRN 11/15/38 (b)		394,109		377,357
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2016-C30, Class A4
2.600% 9/15/49		126,591		115,911
Morgan Stanley Capital I Trust, Series 2015-UBS8, Class XA,
0.993% VRN 12/15/48 (g)		5,604,178		77,287
MSWF Commercial Mortgage Trust, Series 2023-1, Class A4
5.472% 5/15/56		250,000		241,305
MTN Commercial Mortgage Trust, Series 2022-LPFL, Class A, 1 mo. USD Term SOFR + 1.397%
6.737% FRN 3/15/39 (b)		540,000		531,256
SG Commercial Mortgage Securities Trust, Series 2016-C5, Class XA,
2.021% VRN 10/10/48 (g)		3,118,598		106,209
SLG Office Trust, Series 2021-OVA, Class E
2.851% 7/15/41 (b)		260,000		179,069
TTAN, Series 2021-MHC, Class F, 1 mo. USD Term SOFR + 3.014%
8.348% FRN 3/15/38 (b)		330,763		313,781
UBS-Barclays Commercial Mortgage Trust, Series 2013-C5, Class C,
3.865% VRN 3/10/46 (b) (g)		393,000		333,363
Wells Fargo Commercial Mortgage Trust
Series 2015-NXS2, Class XA, 0.735% VRN 7/15/58 (g)		8,934,521		73,061
Series 2015-P2, Class XA, 1.079% VRN 12/15/48 (g)		3,473,235		53,657
Series 2019-C53, Class XA, 1.123% VRN 10/15/52 (g)		4,238,781		178,043
Series 2017-C38, Class A4, 3.190% 7/15/50		293,994		266,064
Series 2016-C35, Class B, 3.438% 7/15/48		328,000		272,499
				11,466,427

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Other Asset-Backed Securities — 1.7%
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B,
5.682% STEP 12/16/41 (b)	$	693,830	$	499,607
CLI Funding VI LLC, Series 2020-3A, Class A
2.070% 10/18/45 (b)		166,250		143,472
Dividend Solar Loans LLC, Series 2018-1, Class B
4.290% 7/20/38 (b)		501,499		432,349
Hero Funding Trust, Series 2016-4A, Class A2
4.290% 9/20/47 (b)		88,904		79,020
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (b)		315,195		265,464
Mosaic Solar Loan Trust, Series 2020-2A, Class B
2.210% 8/20/46 (b)		258,725		208,732
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (b)		185,909		174,035
Sunnova Helios IV Issuer LLC, Series 2020-AA, Class A
2.980% 6/20/47 (b)		356,347		313,710
Sunnova Helios VII Issuer LLC, Series 2021-C, Class C
2.630% 10/20/48 (b)		434,624		337,347
Textainer Marine Containers VII Ltd., Series 2020-2A, Class A
2.100% 9/20/45 (b)		355,244		310,486
Upstart Securitization Trust, Series 2021-3, Class C
3.280% 7/20/31 (b)		500,000		449,325
Vault DI Issuer LLC, Series 2021-1A, Class A2
2.804% 7/15/46 (b)		500,000		425,936
Washington Mutural Asset-Backed Certificates Trust, Series 2006-HE5, Class 2A2, 1 mo. USD Term SOFR + 0.474%
4.014% FRN 10/25/36		54,143		18,117
				3,657,600
Student Loans Asset-Backed Securities — 0.6%
College Avenue Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD Term SOFR + 1.314%
6.634% FRN 12/26/47 (b)		193,394		191,021
ELFI Graduate Loan Program LLC, Series 2020-A, Class A
1.730% 8/25/45 (b)		290,720		245,428
SoFi Professional Loan Program LLC
Series 2017-D, Class BFX, 3.610% 9/25/40 (b)		350,000		311,255
Series 2018-B, Class BFX, 3.830% 8/25/47 (b)		500,000		446,696
				1,194,400
Whole Loan Collateral Collateralized Mortgage Obligations — 3.5%
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A,
4.246% VRN 4/25/37 (g)		516,438		450,526
Countrywide Home Loans Mortgage Pass-Through Trust
Series 2007-HYB2, Class 3A1, 3.745% VRN 2/25/47 (g)		739,452		632,357
Series 2007-3, Class A21, 6.000% 4/25/37		1,283,698		604,025
Series 2007-14, Class A6, 6.000% 9/25/37		1,127,691		602,340
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD Term SOFR + 0.454%
5.782% FRN 12/19/36		368,302		305,265
Imperial Fund Mortgage Trust, Series 2021-NQM2, Class M1,
2.489% VRN 9/25/56 (b) (g)		1,028,000		556,624
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1,
3.269% VRN 7/25/35 (g)		221,419		187,304

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
New Residential Mortgage Loan Trust, Series 2022-NQM4, Class A1,
5.000% STEP 6/25/62 (b)	$	453,158	$	431,181
PRKCM Trust, Series 2023-AFC1, Class A1,
6.598% STEP 2/25/58 (b)		415,336		416,419
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3,
6.500% VRN 10/26/37 (b) (g)		634,128		263,621
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD Term SOFR + 0.714%
6.000% FRN 4/25/37		144,941		111,862
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2,
4.213% VRN 10/25/37 (g)		509,712		389,993
Verus Securitization Trust
Series 2021-4, Class M1, 2.195% VRN 7/25/66 (b) (g)		1,000,000		505,948
Series 2021-R1, Class M1, 2.338% 10/25/63 (b)		1,500,000		1,199,630
Series 2022 - 6, Class A1, 4.910% STEP 6/25/67 (b)		260,537		250,837
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5,
6.350% STEP 5/25/36		630,157		510,148
				7,418,080
Whole Loan Collateral Planned Amortization Classes — 0.3%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15
6.000% 8/25/36		1,270,022		723,051
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $33,667,696)				24,459,558
SOVEREIGN DEBT OBLIGATIONS — 6.9%
Brazil Notas do Tesouro Nacional Serie F
10.000% 1/01/27 BRL (e)		2,920,000		567,580
10.000% 1/01/33 BRL (e)		3,249,000		589,737
Brazilian Government International Bond
3.750% 9/12/31		950,000		798,500
5.625% 2/21/47		300,000		237,456
Colombia Government International Bond
3.250% 4/22/32		230,000		165,058
4.125% 2/22/42		440,000		265,396
Indonesia Government International Bond
3.500% 1/11/28		320,000		296,356
Indonesia Treasury Bond
6.500% 2/15/31 (e)		39,307,000,000		2,493,597
Israel Government International Bond
2.750% 7/03/30		310,000		263,152
Kenya Government International Bond
6.300% 1/23/34 (b)		370,000		245,375
Mexican Bonos
7.750% 11/23/34 MXN (e)		8,220,000		401,876
7.750% 11/13/42 MXN (e)		144,850,000		6,692,565
Mexico Government International Bond
2.659% 5/24/31		200,000		157,807
3.750% 1/11/28		205,000		189,672
4.280% 8/14/41		450,000		331,749
Nigeria Government International Bond
7.143% 2/23/30 (b)		210,000		165,404
Panama Government International Bond
2.252% 9/29/32		200,000		144,552
4.300% 4/29/53		200,000		130,067

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Peruvian Government International Bond
6.550% 3/14/37	$	260,000	$	268,246
Provincia de Buenos Aires/Government Bond,
6.375% STEP 9/01/37 (b)		540,000		175,713
				14,579,858
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $14,814,562)				14,579,858
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (h) — 38.9%
Collateralized Mortgage Obligations — 4.2%
Federal Home Loan Mortgage Corp. Multifamily Structured Pass-Through Certificates
Series K-157, Class X1, 0.419% 5/25/33		9,999,850		231,284
Series K-154, Class X1, 0.527% VRN 1/25/33 (g)		6,599,198		193,913
Series K124, Class X1, 0.810% VRN 12/25/30 (g)		4,980,167		200,785
Series K109, Class A2, 1.558% 4/25/30		100,000		79,991
Series K751, Class A2, 4.412% 3/25/30		100,000		95,365
Federal Home Loan Mortgage Corp. Multifamily WI Certificates
4.500% 12/25/33		100,000		93,183
Federal Home Loan Mortgage Corp. REMICS
Series 5092, Class AP, 2.000% 4/25/41		79,358		66,469
Series 4991, Class QV, 2.000% 9/25/45		93,290		69,843
Series 5085, Class NI, 2.000% 3/25/51		1,358,645		155,050
Series 5071, Class IH, 2.500% 2/25/51		247,422		32,089
Series 4481, Class B, 3.000% 12/15/42		944,173		890,047
Series 4483, Class CA, 3.000% 6/15/44		1,590,278		1,458,596
Series 4391, Class MZ, 3.000% 9/15/44		130,952		108,251
Federal National Mortgage Association REMICS
Series 2018-21, Class PO, 0.000% 4/25/48		635,852		442,852
Series 2021-48, Class NS, 30 day USD SOFR Average + 3.650% 0.000%FRN 8/25/51		1,020,413		24,744
Series 2021-65, Class JA, 2.000% 1/25/46		74,430		60,363
Series 2020-57, Class 57, 2.000% 4/25/50		251,772		207,507
Series 2020-56, Class AQ, 2.000% 8/25/50		300,000		215,366
Series 2014-6, Class Z, 2.500% 2/25/44		127,305		103,160
Series 2012-118, Class VZ, 3.000% 11/25/42		131,802		113,433
Series 2018-18, Class ZG, 3.000% 6/25/50		2,594,224		1,540,468
Series 2020-96, Class IN, 3.000% 1/25/51		395,527		62,407
Series 2015-65, Class CZ, 3.500% 9/25/45		132,645		102,322
Government National Mortgage Association
Series 2022-210, Class IO, 0.695% VRN 7/16/64 (g)		1,487,424		97,162
Series 2022-216, Class IO, 0.750% VRN 7/16/65 (g)		1,491,784		92,045
Series 2020-103, Class AD, 1.450% 1/16/63		292,235		213,287
Series 2022-3, Class B, 1.850% 2/16/61		500,000		235,048
Series 2020-175, Class GI, 2.000% 11/20/50		148,008		16,243
Series 2022-113, Class Z, 2.000% 9/16/61		1,230,353		659,221
Series 2023-92, Class AH, 2.000% 6/16/64		99,995		74,493
Series 2022-220, Class E, 3.000% VRN 10/16/64 (g)		100,000		73,469
Government National Mortgage Association REMICS
Series 2021-103, Class SA, 30 day USD SOFR Average + 3.250% 0.000%FRN 4/20/51		1,192,876		20,680
Series 2022-115, Class MI, 2.500% 5/20/51		473,737		49,197
Series 2021-96, Class VI, 2.500% 6/20/51		431,744		57,044
Series 2021-176, Class IN, 2.500% 10/20/51		516,422		69,114
Series 2022-189, Class PT, 2.500% 10/20/51		95,037		75,515
Series 2022-99, Class JW, 2.500% 1/20/52		100,000		75,892

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2021-58, Class BI, 3.000% 3/20/51	$	643,130	$	96,208
Series 2021-98, Class IG, 3.000% 6/20/51		944,918		152,066
Series 2021-137, Class IQ, 3.000% 8/20/51		1,285,231		193,061
Series 2021-117, Class ID, 3.500% 6/20/51		707,309		113,370
				8,910,603
Pass-Through Securities — 32.9%
Federal Home Loan Mortgage Corp.
Pool #RB5084 1.500% 11/01/40		445,434		347,619
Pool #RB5110 1.500% 5/01/41		495,383		384,897
Pool #RB5117 1.500% 7/01/41		421,819		327,740
Pool #RA4537 1.500% 2/01/51		83,664		60,560
Pool #RB5131 2.000% 10/01/41		594,833		476,250
Pool #RB5138 2.000% 12/01/41		434,270		347,696
Pool #SC0313 2.000% 1/01/42		466,989		372,433
Pool #RB5145 2.000% 2/01/42		710,631		566,742
Pool #QK1354 2.000% 2/01/42		88,682		70,725
Pool #SC0384 2.000% 4/01/42		291,162		233,754
Pool #RB5153 2.000% 4/01/42		728,752		581,194
Pool #SC0319 2.000% 4/01/42		92,936		74,409
Pool #QB3535 2.000% 9/01/50		515,853		395,605
Pool #QB4985 2.000% 11/01/50		74,853		57,545
Pool #SD8146 2.000% 5/01/51		578,027		441,299
Pool #RA5731 2.000% 8/01/51		170,906		130,960
Pool #SD0715 2.000% 9/01/51		1,788,250		1,382,017
Pool #QD2129 2.000% 11/01/51		906,310		691,079
Pool #QD3960 2.000% 1/01/52		360,969		276,374
Pool #RB5149 2.500% 3/01/42		88,949		73,549
Pool #QK1449 2.500% 4/01/42		179,324		148,277
Pool #G08520 2.500% 1/01/43		478,450		401,428
Pool #SD7521 2.500% 7/01/50		199,243		160,825
Pool #SD7525 2.500% 10/01/50		626,750		505,900
Pool #RA3913 2.500% 11/01/50		230,464		185,954
Pool #RA4142 2.500% 12/01/50		290,003		233,994
Pool #SD7534 2.500% 2/01/51		147,710		119,321
Pool #SD8129 2.500% 2/01/51		64,760		51,666
Pool #QC7086 2.500% 9/01/51		600,956		478,037
Pool #QC9443 2.500% 10/01/51		177,093		141,701
Pool #SD0777 2.500% 11/01/51		87,243		69,850
Pool #SD0857 2.500% 1/01/52		453,275		362,971
Pool #SD1749 2.500% 4/01/52		93,680		75,046
Pool #SD7554 2.500% 4/01/52		1,081,629		867,493
Pool #QK1512 3.000% 5/01/42		174,684		149,526
Pool #RA2797 3.000% 6/01/50		54,705		45,314
Pool #QC3242 3.000% 6/01/51		465,621		389,977
Pool #SD8174 3.000% 10/01/51		2,124,110		1,763,598
Pool #SD0781 3.000% 11/01/51		82,218		68,193
Pool #QD6216 3.000% 2/01/52		86,891		72,191
Pool #QD7333 3.000% 2/01/52		92,268		76,759
Pool #G08632 3.500% 3/01/45		615,513		542,606
Pool #RA6531 3.500% 1/01/52		85,044		73,306
Pool #SD1549 3.500% 4/01/52		92,970		80,326
Pool #SD8214 3.500% 5/01/52		276,571		238,181
Pool #SD1936 3.500% 6/01/52		282,460		243,870
Pool #SD1218 4.000% 7/01/49		834,658		755,428
Pool #SD2866 4.000% 7/01/49		97,170		88,340
Pool #RA7185 4.000% 4/01/52		358,265		321,094
Pool #RA7186 4.000% 4/01/52		178,557		160,366

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #SD2549 4.000% 7/01/52	$	94,330	$	85,130
Pool #SD7560 4.000% 2/01/53		191,269		172,067
Pool #SD2792 4.500% 3/01/47		93,866		89,827
Pool #SD1143 4.500% 9/01/50		1,184,836		1,105,839
Pool #SD0615 4.500% 1/01/51		86,114		80,265
Pool #SD1807 4.500% 7/01/52		95,418		88,184
Pool #SD2443 4.500% 10/01/52		97,171		89,318
Pool #SD2394 4.500% 11/01/52		94,736		87,080
Pool #SD1775 4.500% 11/01/52		188,831		174,397
Pool #SD2355 4.500% 12/01/52		95,122		87,435
Pool #WN2371 4.600% 2/01/30		100,000		95,064
Pool #SD1305 5.000% 7/01/52		634,766		601,548
Pool #QF5465 5.000% 12/01/52		95,193		90,077
Pool #SD2374 5.000% 1/01/53		95,558		90,423
Pool #SD2395 5.000% 1/01/53		93,023		88,009
Pool #SD2591 5.000% 3/01/53		95,649		90,613
Pool #RA8790 5.000% 4/01/53		196,558		185,657
Pool #SD3382 5.000% 6/01/53		98,941		93,485
Pool #SD2245 5.500% 12/01/52		97,441		94,360
Pool #SD2138 5.500% 1/01/53		97,583		94,550
Pool #SD2723 5.500% 3/01/53		96,266		93,342
Pool #SD2688 5.500% 4/01/53		96,571		93,668
Pool #SD2511 5.500% 4/01/53		98,377		95,223
Pool #QF9985 5.500% 4/01/53		96,968		93,804
Pool #QG1295 5.500% 4/01/53		98,319		95,185
Pool #SD2762 5.500% 5/01/53		98,036		95,088
Pool #SD2756 5.500% 5/01/53		97,616		94,541
Pool #SD2892 5.500% 5/01/53		96,090		93,201
Pool #QG7311 5.500% 7/01/53		99,787		96,756
Pool #SD2284 6.000% 12/01/52		92,987		92,132
Pool #SD2578 6.000% 3/01/53		191,226		189,079
Pool #SD2452 6.500% 2/01/53		93,152		93,915
Pool #RA8904 6.500% 4/01/53		187,253		188,788
Pool #RA9081 6.500% 5/01/53		98,336		99,481
Federal National Mortgage Association
Pool #MA4519 1.500% 1/01/42		89,099		68,893
Pool #MA4236 1.500% 1/01/51		82,852		59,972
Pool #MA4280 1.500% 3/01/51		303,698		219,829
Pool #FP0028 2.000% 8/01/40		97,037		78,571
Pool #MA4422 2.000% 9/01/41		835,770		669,155
Pool #MA4446 2.000% 10/01/41		251,966		201,736
Pool #MA4474 2.000% 11/01/41		171,236		137,099
Pool #MA4501 2.000% 12/01/41		87,049		69,696
Pool #MA4540 2.000% 2/01/42		88,298		70,420
Pool #MA4606 2.000% 5/01/42		274,033		218,547
Pool #BQ3331 2.000% 8/01/50		76,263		58,486
Pool #CA7023 2.000% 9/01/50		73,409		56,435
Pool #CA7224 2.000% 10/01/50		146,726		112,798
Pool #BQ4926 2.000% 10/01/50		73,434		56,247
Pool #CA9220 2.000% 2/01/51		327,002		249,652
Pool #BR4052 2.000% 2/01/51		76,218		58,451
Pool #CA8779 2.000% 2/01/51		162,091		124,155
Pool #MA4305 2.000% 4/01/51		491,084		374,922
Pool #FM9441 2.000% 4/01/51		85,065		64,944
Pool #MA4325 2.000% 5/01/51		250,564		191,295
Pool #FS4654 2.000% 7/01/51		194,395		149,080
Pool #FM9489 2.000% 11/01/51		88,474		67,712
Pool #BU2591 2.000% 12/01/51		92,308		70,214

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FS2040 2.000% 2/01/52	$	92,642	$	70,555
Pool #FS4270 2.000% 3/01/52		96,333		73,998
Pool #BS4941 2.460% 4/01/32		978,200		792,029
Pool #MA4177 2.500% 11/01/40		59,279		49,349
Pool #FS0697 2.500% 2/01/42		85,973		71,814
Pool #MA4571 2.500% 3/01/42		88,244		72,966
Pool #MA4587 2.500% 4/01/42		180,607		149,339
Pool #BV7697 2.500% 4/01/42		365,852		302,511
Pool #MA4607 2.500% 5/01/42		90,082		74,486
Pool #FM4052 2.500% 9/01/50		2,435,343		1,965,762
Pool #MA4256 2.500% 2/01/51		1,604,907		1,280,403
Pool #FS1924 2.500% 3/01/51		87,511		69,817
Pool #MA4306 2.500% 4/01/51		128,497		102,475
Pool #FS1111 2.500% 5/01/51		87,616		69,901
Pool #FM7673 2.500% 6/01/51		320,918		257,835
Pool #BT5574 2.500% 8/01/51		81,182		64,559
Pool #FS0028 2.500% 9/01/51		86,553		69,390
Pool #FM8786 2.500% 10/01/51		84,869		68,040
Pool #BU3295 2.500% 10/01/51		170,278		135,397
Pool #FM9195 2.500% 10/01/51		171,633		137,332
Pool #FS0549 2.500% 2/01/52		269,834		215,992
Pool #BU1322 2.500% 2/01/52		91,276		73,120
Pool #FS3368 2.500% 3/01/52		94,526		75,694
Pool #FS2595 2.500% 3/01/52		184,759		148,066
Pool #FS1626 2.500% 4/01/52		182,824		146,172
Pool #BF0546 2.500% 7/01/61		607,001		467,196
Pool #BF0560 2.500% 9/01/61		89,276		68,714
Pool #FS1542 3.000% 4/01/42		172,630		147,767
Pool #CB3542 3.000% 5/01/42		89,188		76,343
Pool #MA4643 3.000% 5/01/42		90,893		77,803
Pool #MA4632 3.000% 6/01/42		365,856		313,165
Pool #MA2248 3.000% 4/01/45		274,844		229,077
Pool #AS7661 3.000% 8/01/46		275,977		229,245
Pool #FM9934 3.000% 12/01/48		855,326		722,251
Pool #FM9564 3.000% 2/01/50		1,004,957		848,603
Pool #CA7531 3.000% 10/01/50		73,376		61,719
Pool #FM8480 3.000% 11/01/50		62,765		52,343
Pool #FM9464 3.000% 11/01/51		164,524		137,950
Pool #BU1421 3.000% 1/01/52		88,902		74,265
Pool #FS1171 3.000% 1/01/52		432,810		358,980
Pool #FS2463 3.000% 2/01/52		551,392		458,712
Pool #FS1289 3.000% 3/01/52		437,693		368,227
Pool #FS1374 3.000% 3/01/52		90,410		74,846
Pool #CB3833 3.000% 6/01/52		92,266		76,628
Pool #CB3386 3.500% 4/01/42		89,063		78,794
Pool #MA3210 3.500% 12/01/47		183,560		160,389
Pool #FM7100 3.500% 6/01/50		113,234		99,056
Pool #FS1240 3.500% 12/01/51		86,942		75,279
Pool #FS1237 3.500% 12/01/51		252,603		220,184
Pool #FS1241 3.500% 1/01/52		89,596		77,565
Pool #FS1462 3.500% 1/01/52		173,394		151,032
Pool #FS2296 3.500% 1/01/52		440,993		381,089
Pool #FS1118 3.500% 3/01/52		85,888		73,993
Pool #FS1092 3.500% 4/01/52		532,042		460,264
Pool #FS1454 3.500% 4/01/52		180,487		156,125
Pool #FS1555 3.500% 4/01/52		181,604		157,304
Pool #CB3282 3.500% 4/01/52		179,883		155,419
Pool #BV8546 3.500% 5/01/52		177,075		153,768

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FS1556 3.500% 5/01/52	$	723,635	$	628,842
Pool #FS1866 3.500% 5/01/52		94,971		82,085
Pool #CB3899 3.500% 6/01/52		465,808		400,859
Pool #FS3339 3.500% 6/01/52		281,617		243,142
Pool #BS6215 3.840% 7/01/32		100,000		90,252
Pool #BS6949 3.980% 10/01/32		100,000		89,216
Pool #FM3049 4.000% 4/01/44		205,316		189,043
Pool #AX2501 4.000% 10/01/44		580,227		528,050
Pool #CA2472 4.000% 10/01/48		57,923		52,189
Pool #CA5371 4.000% 3/01/50		56,243		50,486
Pool #FS4645 4.000% 11/01/51		93,542		83,662
Pool #FM9413 4.000% 11/01/51		67,335		60,223
Pool #FS4108 4.000% 12/01/51		97,885		87,607
Pool #CB3272 4.000% 4/01/52		181,648		163,142
Pool #CB3320 4.000% 4/01/52		366,397		328,383
Pool #CB3384 4.000% 4/01/52		84,766		75,680
Pool #CB3614 4.000% 5/01/52		90,634		81,400
Pool #FS2023 4.000% 5/01/52		188,800		169,506
Pool #FS2442 4.000% 7/01/52		187,594		168,057
Pool #FM1263 4.500% 7/01/49		40,505		37,741
Pool #FS4480 4.500% 3/01/50		92,418		86,921
Pool #MA4031 4.500% 5/01/50		22,548		21,019
Pool #FS0067 4.500% 9/01/51		70,715		65,784
Pool #FS2914 4.500% 9/01/52		94,130		87,111
Pool #BX2186 4.500% 11/01/52		77,811		71,498
Pool #FS3977 4.500% 11/01/52		94,511		86,873
Pool #FS3836 4.500% 1/01/53		94,240		86,624
Pool #CB5892 4.500% 3/01/53		96,174		88,401
Pool #BS8410 4.740% 6/01/30		100,000		97,031
Pool #CB3880 5.000% 6/01/52		89,307		84,772
Pool #BW0048 5.000% 7/01/52		87,782		83,051
Pool #FS3978 5.000% 1/01/53		95,653		90,498
Pool #FS3941 5.000% 2/01/53		97,913		92,651
Pool #FS4308 5.000% 4/01/53		95,477		90,212
Pool #FS4524 5.000% 5/01/53		96,972		91,624
Pool #FS3672 5.500% 2/01/53		97,063		94,297
Pool #FS4166 5.500% 4/01/53		96,452		93,336
Pool #FS4805 5.500% 5/01/53		99,183		96,128
Pool #CB6322 5.500% 5/01/53		96,856		93,883
Pool #CB7109 5.500% 9/01/53		399,662		386,897
Pool #CB7114 5.500% 9/01/53		599,448		579,741
Pool #FS4454 6.000% 4/01/53		95,211		94,169
Pool #FS4573 6.000% 5/01/53		193,080		191,365
Pool #CB6753 6.000% 7/01/53		293,716		291,015
Pool #CB5497 6.500% 1/01/53		276,691		279,825
Pool #BX7702 6.500% 2/01/53		91,334		92,083
Government National Mortgage Association II
Pool #MA7192 2.000% 2/20/51		464,173		368,446
Pool #BS8546 2.500% 12/20/50		71,285		57,605
Pool #785565 2.500% 6/20/51		83,871		67,670
Pool #785568 2.500% 8/20/51		82,307		66,409
Pool #785657 2.500% 10/20/51		169,997		137,106
Pool #785663 2.500% 10/20/51		83,426		67,285
Pool #785667 2.500% 10/20/51		86,036		69,390
Pool #785662 2.500% 10/20/51		2,261,836		1,822,807
Pool #785762 2.500% 11/20/51		87,646		70,689
Pool #785764 2.500% 11/20/51		645,031		520,837
Pool #785789 2.500% 12/20/51		86,828		70,028

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #785821 2.500% 12/20/51	$	88,597	$	71,455
Pool #MA7368 3.000% 5/20/51		198,268		168,681
Pool #MA7590 3.000% 9/20/51		1,477,436		1,255,928
Pool #MA7650 3.000% 10/20/51		405,345		344,573
Pool #MA7706 3.000% 11/20/51		167,610		142,481
Pool #MA7768 3.000% 12/20/51		170,947		145,211
Pool #MA7828 3.000% 1/20/52		86,576		73,521
Pool #MA7937 3.000% 3/20/52		178,235		151,136
Pool #786150 3.000% 3/20/52		92,255		77,386
Pool #786583 3.000% 3/20/52		192,738		161,914
Pool #786843 3.000% 3/20/52		198,016		166,224
Pool #MA8424 3.000% 11/20/52		94,578		80,272
Pool #MA8486 3.000% 12/20/52		561,217		476,330
Pool #MA8565 3.000% 1/20/53		95,917		81,387
Pool #MA5594 3.500% 11/20/48		162,739		144,366
Pool #MA6711 3.500% 6/20/50		281,775		249,941
Pool #MA6997 3.500% 11/20/50		342,063		303,258
Pool #MA7883 3.500% 2/20/52		624,006		548,049
Pool #MA7989 3.500% 4/20/52		460,250		403,794
Pool #786216 3.500% 6/20/52		185,342		161,000
Pool #MA8487 3.500% 12/20/52		193,669		169,641
Pool #MA5078 4.000% 3/20/48		175,794		160,664
Pool #MA5763 4.000% 2/20/49		154,611		141,160
Pool #MA5817 4.000% 3/20/49		63,848		58,293
Pool #MA5876 4.000% 4/20/49		50,847		46,423
Pool #MA8045 4.000% 5/20/52		186,229		167,844
Pool #CK9592 4.000% 6/20/52		93,287		83,918
Pool #786429 4.000% 6/20/52		95,022		86,428
Pool #MA5193 4.500% 5/20/48		28,201		26,458
Pool #MA5265 4.500% 6/20/48		191,297		179,472
Pool #MA5399 4.500% 8/20/48		70,982		66,550
Pool #MA5652 4.500% 12/20/48		34,261		32,090
Pool #MA5711 4.500% 1/20/49		562,277		526,292
Pool #MA5764 4.500% 2/20/49		92,466		86,548
Pool #MA5818 4.500% 3/20/49		152,960		143,170
Pool #MA8046 4.500% 5/20/52		184,895		170,852
Pool #786366 4.500% 8/20/52		188,640		174,445
Pool #MA8268 4.500% 9/20/52		190,926		176,723
Pool #786335 4.500% 9/20/52		189,093		175,396
Pool #MA5194 5.000% 5/20/48		19,032		18,401
Pool #MA5597 5.000% 11/20/48		38,687		37,296
Pool #MA5653 5.000% 12/20/48		46,928		45,242
Pool #MA5712 5.000% 1/20/49		36,919		35,535
Pool #MA5878 5.000% 4/20/49		19,089		18,403
Pool #MA6287 5.000% 11/20/49		16,818		16,183
Pool #MA6413 5.000% 1/20/50		37,559		36,106
Pool #786340 5.000% 9/20/52		95,289		90,971
Pool #MA8348 5.000% 10/20/52		95,243		90,384
Pool #MA8428 5.000% 11/20/52		192,092		182,292
Pool #786474 5.000% 1/20/53		96,210		91,851
Pool #MA8569 5.000% 1/20/53		389,847		369,958
Pool #MA8725 5.000% 3/20/53		98,170		93,130
Pool #MA8429 5.500% 11/20/52		284,984		276,949
Pool #786535 5.500% 2/20/53		194,848		190,450
Pool #MA9018 6.000% 7/20/53 (f)		696,895		691,156
Government National Mortgage Association II, TBA
3.000% 10/20/53 (f)		700,000		593,212
3.500% 10/20/53 (f)		200,000		175,211

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.000% 10/20/53 (f)	$	800,000	$	720,778
5.000% 10/20/53 (f)		1,200,000		1,137,465
5.500% 10/20/53 (f)		800,000		776,403
6.000% 10/20/53 (f)		900,000		891,840
6.500% 10/20/53 (f)		200,000		201,212
Uniform Mortgage-Backed Security, TBA
2.000% 10/01/53 (f)		2,800,000		2,128,421
4.000% 10/01/53 (f)		300,000		267,187
4.500% 10/01/52 (f)		200,000		183,664
5.000% 10/01/53 (f)		500,000		471,817
5.500% 10/01/53 (f)		700,000		676,594
6.000% 10/01/53 (f)		1,700,000		1,678,019
6.500% 10/01/53 (f)		1,100,000		1,105,258
				70,086,230
Whole Loans — 1.8%
Federal Home Loan Mortgage Corp. STACR REMICS Trust, Series 2022-DNA2, Class M1B, 30 day USD SOFR Average + 2.400%
7.715% FRN 2/25/42 (b)		1,864,000		1,873,429
Federal National Mortgage Association Connecticut Avenue Securities, Series 2022-R04, Class 1M2, 30 day USD SOFR Average + 3.100%
8.415% FRN 3/25/42 (b)		2,000,000		2,032,011
				3,905,440
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $91,634,006)				82,902,273
U.S. TREASURY OBLIGATIONS — 1.2%
U.S. Treasury Bonds & Notes — 1.2%
U.S. Treasury Bonds
3.625% 5/15/53		40,000		33,103
U.S. Treasury Inflation-Indexed Notes
1.125% 1/15/33		2,390,976		2,159,070
U.S. Treasury Notes
3.875% 8/15/33		70,000		66,128
4.375% 8/31/28		20,000		19,801
5.000% 8/31/25		170,000		169,659
				2,447,761
TOTAL U.S. TREASURY OBLIGATIONS (Cost $2,666,016)				2,447,761
TOTAL BONDS & NOTES (Cost $241,145,547)				213,628,689
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $288,275)				466,660
TOTAL LONG-TERM INVESTMENTS (Cost $241,433,822)				214,095,349

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
SHORT-TERM INVESTMENTS — 5.3%
Investment of Cash Collateral from Securities Loaned — 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio (i)		2,738,555	$	2,738,555
	Principal Amount
Repurchase Agreement — 3.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (j)	$	6,445,370		6,445,370
U.S. Treasury Bill — 1.0%
U.S. Treasury Bills
5.517% 1/30/24 (f) (k)		2,250,000		2,210,247
TOTAL SHORT-TERM INVESTMENTS (Cost $11,394,172)				11,394,172
TOTAL INVESTMENTS — 105.9% (Cost $252,827,994) (l)				225,489,521
Other Assets/(Liabilities) — (5.9)%				(12,554,259)
NET ASSETS — 100.0%			$	212,935,262

Abbreviation Legend

FRN Floating Rate Note

LIBOR London Inter-Bank Offered Rate

REMICS Real Estate Mortgage Investment Conduits

SOFR Secured Overnight Financing Rate

STEP Step Up Bond

TBA To Be Announced

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) All or a portion of the security represents unsettled bank loan commitments at September 30, 2023 where the rate will be determined at time of settlement.

(b) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2023, the aggregate market value of these securities amounted to $35,168,640 or 16.52% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $2,846,741 or 1.34% of net assets. The Fund received $169,737 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

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

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

(g) 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, 2023.

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

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

(j) Maturity value of $6,446,229. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 2/28/26, and an aggregate market value, including accrued interest, of $6,574,346.

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

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

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

(#) OTC Options Purchased
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation (Depreciation)
Put
USD Put MXN Call	Citigroup Global Markets, Inc.		10/04/23		17.13		2,178,755	USD	2,178,755	$	872	$	29,152	$	(28,280)
USD Put AUD Call	JP Morgan Chase Bank N.A.		11/02/23		0.67		1,130,000	USD	1,130,000		1,243		13,470		(12,227)
										$	2,115	$	42,622	$	(40,507)

(#) Exchange-Traded Options Purchased
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation (Depreciation)
Call
U.S. Treasury Note 5 Year Future	10/27/23		105.75		112	USD	11,800,250	$	43,750	$	32,569	$	11,181
U.S. Treasury Note 5 Year Future	10/27/23		106.00		55	USD	5,794,766		16,758		39,580		(22,822)
								$	60,508	$	72,149	$	(11,641)
Put
SOFR 1 Year Mid Curve Future	10/13/23		97.00		46	USD	10,972,150	$	182,850	$	50,072	$	132,778
SOFR 1 Year Mid Curve Future	12/15/23		95.88		40	USD	9,541,000		58,500		35,996		22,504
SOFR 1 Year Mid Curve Future	12/15/23		96.00		95	USD	22,659,875		162,687		87,436		75,251
								$	404,037	$	173,504	$	230,533
								$	464,545	$	245,653	$	218,892

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

OTC Options Written
Description	Counterparty	Expiration Date		Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation (Depreciation)
Put
USD Put MXN Call	Bank of America N.A.		10/10/23		17.07		900,000	USD	900,000	$	(720)	$	(6,642)	$	5,922
USD Put MXN Call	Bank of America N.A.		11/17/23		16.76		1,070,000	USD	1,070,000		(2,140)		(5,934)		3,794
USD Put MXN Call	Citigroup Global Markets, Inc.		11/17/23		16.78		1,040,000	USD	1,040,000		(2,288)		(5,668)		3,380
										$	(5,148)	$	(18,244)	$	13,096

Exchange-Traded Options Written
Description	Expiration Date	Exercise Price		No. of Contracts		Notional Amount		Value		Premiums Paid (Received)		Unrealized Appreciation (Depreciation)
Call
3 Month SOFR Future	9/13/24		96.88		31	USD	7,411,325	$	(10,269)	$	(13,510)	$	3,241
3 Month SOFR Future	9/13/24		97.00		72	USD	17,213,400		(21,600)		(56,549)		34,949
								$	(31,869)	$	(70,059)	$	38,190
Put
SOFR 1 Year Mid Curve Future	10/13/23		96.25		46	USD	10,972,150	$	(96,888)	$	(16,616)	$	(80,272)
SOFR 1 Year Mid Curve Future	10/13/23		96.50		46	USD	10,972,150		(125,350)		(24,678)		(100,672)
U.S. Treasury Note 5 Year Future	10/27/23		105.50		53	USD	5,584,047		(33,539)		(22,166)		(11,373)
U.S. Treasury Bond Future	11/24/23		112.00		24	USD	2,730,750		(46,125)		(11,708)		(34,417)
SOFR 1 Year Mid Curve Future	12/15/23		95.25		80	USD	19,082,000		(38,500)		(31,832)		(6,668)
SOFR 1 Year Mid Curve Future	12/15/23		95.38		190	USD	45,319,750		(119,938)		(79,301)		(40,637)
3 Month SOFR Future	6/14/24		94.50		305	USD	72,620,500		(146,781)		(106,209)		(40,572)
								$	(607,121)	$	(292,510)	$	(314,611)
								$	(638,990)	$	(362,569)	$	(276,421)

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	10/12/23	MXN	4,201,000	USD	237,613	$	3,087
Bank of America N.A.	11/22/23	MXN	5,334,945	USD	310,000		(6,435)
BNP Paribas SA	10/20/23	USD	2,520,601	CAD	3,390,244		23,970
BNP Paribas SA	10/20/23	USD	1,170,195	AUD	1,826,687		(4,920)
BNP Paribas SA	10/20/23	NOK	12,348,502	EUR	1,064,716		28,517
BNP Paribas SA	10/20/23	CAD	5,556,409	USD	4,192,568		(100,738)
BNP Paribas SA	10/20/23	AUD	8,059,614	USD	5,378,550		(193,772)
Citibank N.A.	10/06/23	USD	1,290,912	MXN	22,112,032		22,728
Citibank N.A.	11/22/23	MXN	5,374,125	USD	312,000		(6,206)
Goldman Sachs & Co.	10/06/23	MXN	13,272,000	USD	756,399		4,785
Goldman Sachs & Co.	10/20/23	USD	1,434,699	MXN	24,383,246		39,551
Goldman Sachs & Co.	10/20/23	MXN	8,650,084	USD	497,697		(2,761)
Goldman Sachs & Co.	11/22/23	USD	310,000	MXN	5,336,162		6,366
JP Morgan Chase Bank N.A.	10/20/23	ZAR	6,598,022	USD	347,749		221
JP Morgan Chase Bank N.A.	10/20/23	USD	1,434,596	IDR	21,656,660,000		33,362
JP Morgan Chase Bank N.A.	11/06/23	USD	400,294	AUD	610,000		7,652
Morgan Stanley & Co. LLC	10/06/23	MXN	8,840,032	USD	513,955		(6,956)
Morgan Stanley & Co. LLC	10/12/23	USD	513,433	MXN	8,840,032		6,936
Morgan Stanley & Co. LLC	10/12/23	MXN	4,639,032	USD	270,088		(4,291)
Morgan Stanley & Co. LLC	10/20/23	USD	835,367	MXN	14,241,252		20,518
Morgan Stanley & Co. LLC	10/20/23	JPY	905,501,301	USD	6,498,194		(422,463)
Morgan Stanley & Co. LLC	10/20/23	EUR	904,220	USD	998,385		(41,733)
Morgan Stanley & Co. LLC	10/20/23	MXN	5,190,000	USD	302,197		(5,238)
Morgan Stanley & Co. LLC	10/20/23	USD	1,149,553	JPY	157,391,437		93,488
Morgan Stanley & Co. LLC	10/20/23	USD	1,552,971	CNH	11,159,745		23,297
Morgan Stanley & Co. LLC	10/20/23	USD	1,972,986	GBP	1,532,007		103,592
Morgan Stanley & Co. LLC	11/06/23	AUD	610,000	USD	400,462		(7,820)
						$	(385,263)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation (Depreciation)
Long
Euro-OAT	12/07/23		16	$	2,133,139	$	(49,088)
U.S. Treasury Note 10 Year	12/19/23		2		216,551		(426)
U.S. Treasury Ultra Bond	12/19/23		255		32,302,021		(2,036,708)
UK Long Gilt	12/27/23		14		1,603,114		5,271
3 Month SOFR	3/18/25		16		3,836,469		(20,069)
3 Month SOFR	3/17/26		177		42,540,751		(40,838)
						$	(2,141,858)
Short
Euro-Buxl 30 Year Bond	12/07/23		2	$	(278,942)	$	20,212
Japanese 10 Year Bond	12/13/23		4		(3,911,114)		31,028
U.S. Treasury Long Bond	12/19/23		6		(720,975)		38,287
U.S. Treasury Ultra 10 Year	12/19/23		72		(8,235,204)		202,704
U.S. Treasury Note 2 Year	12/29/23		109		(22,149,304)		53,812
U.S. Treasury Note 5 Year	12/29/23		196		(20,721,296)		70,858
3 Month SOFR	3/19/24		186		(44,398,948)		433,198
						$	850,099

Centrally Cleared Credit Default Swaps - Buy Protection

Reference Obligation/Index

Rate Paid by Fund

Payment Frequency

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.HY Series 41†

5.000%

Quarterly

12/20/28

USD

272,200

$

(2,129)

$

(1,948)

$

(181)

Centrally Cleared Credit Default Swaps - Sell Protection††

Reference Obligation/ Index

Rate Received by Fund

Payment Frequency

Termination Date

Credit Rating

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.IG Series 41†

1.000%

Quarterly

12/20/28

BBB*

USD

20,636,900

$

245,104

$

274,928

$

(29,824)

MML Dynamic Bond Fund —  Portfolio of Investments (Continued)

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 5.410%	Maturity		Fed Funds		Maturity		1/31/24	USD	53,306,000	$	2,071	$	—	$	2,071
12-Month USD SOFR	Annually		Fixed 4.100%		Annually		3/10/26	USD	18,692,000		(183,466)		225,325		(408,791)
12-Month USD SOFR	Annually		Fixed 4.180%		Annually		2/29/28	USD	17,570,000		(128,535)		13,505		(142,040)
12-Month USD SOFR	Annually		Fixed 4.000%		Annually		2/29/28	USD	11,900,000		(168,374)		(2,191)		(166,183)
Fixed 2.850%	Annually		12-Month USD SOFR		Annually		2/15/29	USD	948,000		67,967		(12,109)		80,076
Fixed 3.270%	Annually		12-Month USD SOFR		Annually		4/30/29	USD	3,151,000		167,364		22,078		145,286
Fixed 3.250%	Annually		12-Month USD SOFR		Annually		9/30/29	USD	2,107,000		119,178		980		118,198
Fixed 3.400%	Annually		12-Month USD SOFR		Annually		3/10/34	USD	4,169,000		265,446		(70,098)		335,544
Fixed 3.050%	Annually		12-Month USD SOFR		Annually		2/15/48	USD	10,646,000		1,756,127		208,368		1,547,759
										$	1,897,778	$	385,858	$	1,511,920

OTC Interest Rate Swaps

Paid by the Fund

Received by the Fund

Rate/ Reference

Frequency

Rate/ Reference

Frequency

Counterparty

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

BRL-CDI

Maturity

Fixed 10.230%

Maturity

JP Morgan Chase Bank N.A.

1/02/29

BRL

17,860,000

$

(114,158)

$

—

$

(114,158)

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

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

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

Currency Legend

AUD Australian Dollar

BRL Brazilian Real

CAD Canadian Dollar

CNH Offshore Chinese Yuan

EUR Euro

GBP British Pound

IDR Indonesian Rupiah

INR Indian Rupee

JPY Japanese Yen

MXN Mexican Peso

NOK Norwegian Krone

USD U.S. Dollar

ZAR South African Rand

MML Equity Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.2%
COMMON STOCK — 98.2%
Basic Materials — 2.8%
Chemicals — 1.2%
CF Industries Holdings, Inc.		2,600	$	222,924
Dow, Inc.		36,700		1,892,252
Eastman Chemical Co.		6,300		483,336
Linde PLC (LIN US)		7,200		2,680,920
LyondellBasell Industries NV Class A		17,708		1,676,948
Nutrien Ltd. (a)		24,375		1,505,400
Olin Corp.		7,102		354,958
				8,816,738
Forest Products & Paper — 0.1%
International Paper Co.		17,600		624,272
Iron & Steel — 0.9%
Cleveland-Cliffs, Inc. (b)		25,900		404,817
Commercial Metals Co.		2,600		128,466
Nucor Corp.		20,000		3,127,000
Reliance Steel & Aluminum Co.		3,900		1,022,697
Steel Dynamics, Inc.		14,000		1,501,080
U.S. Steel Corp.		12,300		399,504
				6,583,564
Mining — 0.6%
Franco-Nevada Corp.		5,900		787,591
Freeport-McMoRan, Inc.		45,500		1,696,695
Newmont Corp.		19,200		709,440
Southern Copper Corp.		8,583		646,214
Wheaton Precious Metals Corp. (a)		27,400		1,111,070
				4,951,010
				20,975,584
Communications — 5.9%
Advertising — 0.2%
Interpublic Group of Cos., Inc.		21,100		604,726
Omnicom Group, Inc.		14,300		1,065,064
				1,669,790
Internet — 1.0%
Alphabet, Inc. Class C (b)		19,642		2,589,798
Amazon.com, Inc. (b)		5,000		635,600
Booking Holdings, Inc. (b)		927		2,858,821

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
eBay, Inc.		27,100	$	1,194,839
				7,279,058
Media — 1.6%
Charter Communications, Inc. Class A (b)		2,100		923,622
Comcast Corp. Class A		238,400		10,570,656
Fox Corp. Class A		22,400		698,880
				12,193,158
Telecommunications — 3.1%
Cisco Systems, Inc.		223,900		12,036,864
Corning, Inc.		45,800		1,395,526
Juniper Networks, Inc.		16,400		455,756
T-Mobile US, Inc. (b)		18,800		2,632,940
Verizon Communications, Inc.		213,600		6,922,776
				23,443,862
				44,585,868
Consumer, Cyclical — 6.5%
Apparel — 0.1%
Levi Strauss & Co. Class A (a)		4,900		66,542
Ralph Lauren Corp.		2,350		272,812
Skechers USA, Inc. Class A (b)		6,900		337,755
				677,109
Auto Manufacturers — 1.6%
Cummins, Inc.		16,500		3,769,590
Ford Motor Co.		260,300		3,232,926
General Motors Co.		93,100		3,069,507
PACCAR, Inc.		28,313		2,407,171
				12,479,194
Auto Parts & Equipment — 0.1%
BorgWarner, Inc.		12,800		516,736
Lear Corp.		3,100		416,020
				932,756
Distribution & Wholesale — 0.4%
Ferguson PLC		10,400		1,710,488
LKQ Corp.		20,000		990,200
				2,700,688
Home Builders — 0.9%
DR Horton, Inc.		24,200		2,600,774
Lennar Corp. Class A		18,200		2,042,586
NVR, Inc. (b)		100		596,330
PulteGroup, Inc.		17,800		1,318,090
Toll Brothers, Inc.		3,100		229,276
				6,787,056

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Leisure Time — 0.2%
Brunswick Corp.		4,900	$	387,100
Norwegian Cruise Line Holdings Ltd. (a) (b)		23,600		388,928
Polaris, Inc.		3,100		322,834
				1,098,862
Lodging — 0.1%
Boyd Gaming Corp.		5,498		334,443
Hilton Worldwide Holdings, Inc.		4,800		720,864
				1,055,307
Retail — 3.1%
AutoNation, Inc. (b)		5,200		787,280
AutoZone, Inc. (b)		760		1,930,392
Bath & Body Works, Inc.		10,500		354,900
Best Buy Co., Inc.		12,000		833,640
Home Depot, Inc.		4,000		1,208,640
Lithia Motors, Inc.		1,400		413,462
Lowe's Cos., Inc.		48,800		10,142,592
McDonald's Corp.		7,900		2,081,176
Murphy USA, Inc.		1,100		375,903
Penske Automotive Group, Inc.		3,900		651,534
Target Corp.		2,199		243,144
Ulta Beauty, Inc. (b)		3,700		1,477,965
Walmart, Inc.		14,747		2,358,488
Williams-Sonoma, Inc. (a)		3,600		559,440
				23,418,556
				49,149,528
Consumer, Non-cyclical — 23.0%
Agriculture — 2.7%
Altria Group, Inc.		95,600		4,019,980
Archer-Daniels-Midland Co.		36,700		2,767,914
Bunge Ltd.		5,200		562,900
Darling Ingredients, Inc. (b)		8,600		448,920
Philip Morris International, Inc.		134,784		12,478,303
				20,278,017
Beverages — 0.6%
Coca-Cola Co.		28,400		1,589,832
Molson Coors Beverage Co. Class B		10,946		696,056
PepsiCo, Inc.		12,400		2,101,056
				4,386,944
Biotechnology — 2.5%
Amgen, Inc.		39,200		10,535,392
Bio-Rad Laboratories, Inc. Class A (b)		1,300		465,985
Biogen, Inc. (b)		7,400		1,901,874
Gilead Sciences, Inc.		68,000		5,095,920
Regeneron Pharmaceuticals, Inc. (b)		1,290		1,061,618
				19,060,789

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Commercial Services — 0.9%
Avis Budget Group, Inc. (b)		2,000	$	359,380
FleetCor Technologies, Inc. (b)		4,493		1,147,243
Global Payments, Inc.		13,200		1,523,148
H&R Block, Inc.		2,000		86,120
Robert Half, Inc.		5,400		395,712
Service Corp. International		27,900		1,594,206
U-Haul Holding Co. (UHAL US) (a) (b)		1,100		60,027
U-Haul Holding Co. (UHAL/B US)		10,400		544,856
United Rentals, Inc.		3,600		1,600,452
				7,311,144
Cosmetics & Personal Care — 1.1%
Colgate-Palmolive Co.		22,000		1,564,420
Kenvue, Inc.		129,705		2,604,477
Procter & Gamble Co.		27,848		4,061,909
				8,230,806
Food — 1.6%
General Mills, Inc.		12,011		768,584
Ingredion, Inc.		3,600		354,240
J. M. Smucker Co.		5,200		639,132
Kellogg Co.		16,400		975,964
Kraft Heinz Co.		87,337		2,938,017
Kroger Co.		38,100		1,704,975
Mondelez International, Inc. Class A		65,530		4,547,782
				11,928,694
Health Care – Products — 1.1%
Danaher Corp.		10,665		2,645,986
GE HealthCare Technologies, Inc. (b)		33,091		2,251,512
Medtronic PLC		19,100		1,496,676
Thermo Fisher Scientific, Inc.		4,109		2,079,853
				8,474,027
Health Care – Services — 4.1%
Centene Corp. (b)		7,400		509,712
DaVita, Inc. (b)		4,600		434,838
Elevance Health, Inc.		33,840		14,734,613
HCA Healthcare, Inc.		30,860		7,590,943
Humana, Inc.		3,750		1,824,450
Laboratory Corp. of America Holdings		6,300		1,266,615
Molina Healthcare, Inc. (b)		1,600		524,624
Quest Diagnostics, Inc.		9,100		1,108,926
Tenet Healthcare Corp. (b)		20,487		1,349,888
UnitedHealth Group, Inc.		2,113		1,065,353
Universal Health Services, Inc. Class B		4,900		616,077
				31,026,039
Pharmaceuticals — 8.4%
AbbVie, Inc.		91,200		13,594,272
AstraZeneca PLC Sponsored ADR		40,219		2,723,631
Becton Dickinson & Co.		9,180		2,373,305
Cardinal Health, Inc.		14,308		1,242,221

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Cencora, Inc.		40,537	$	7,295,444
Cigna Group		18,000		5,149,260
Henry Schein, Inc. (b)		7,100		527,175
Johnson & Johnson		52,871		8,234,658
McKesson Corp.		10,700		4,652,895
Merck & Co., Inc.		149,800		15,421,910
Pfizer, Inc.		70,150		2,326,875
Viatris, Inc.		61,000		601,460
				64,143,106
				174,839,566
Energy — 14.3%
Oil & Gas — 11.9%
APA Corp.		17,800		731,580
Chevron Corp.		127,261		21,458,750
ConocoPhillips		92,900		11,129,420
Coterra Energy, Inc.		38,400		1,038,720
Devon Energy Corp.		8,522		406,500
EOG Resources, Inc.		38,300		4,854,908
EQT Corp.		84,909		3,445,607
Exxon Mobil Corp.		241,409		28,384,870
Marathon Oil Corp.		37,515		1,003,526
Marathon Petroleum Corp.		20,300		3,072,202
Occidental Petroleum Corp.		49,300		3,198,584
Phillips 66		22,700		2,727,405
Pioneer Natural Resources Co.		11,900		2,731,645
Range Resources Corp.		95,800		3,104,878
Southwestern Energy Co. (b)		56,000		361,200
Valero Energy Corp.		21,100		2,990,081
				90,639,876
Oil & Gas Services — 1.2%
Halliburton Co.		131,600		5,329,800
Nov, Inc.		35,900		750,310
Schlumberger NV		51,000		2,973,300
				9,053,410
Pipelines — 1.2%
Cheniere Energy, Inc.		12,300		2,041,308
Kinder Morgan, Inc.		237,600		3,939,408
ONEOK, Inc.		21,400		1,357,402
Williams Cos., Inc.		51,283		1,727,724
				9,065,842
				108,759,128
Financial — 21.1%
Banks — 9.4%
Bank of America Corp.		365,625		10,010,813
Bank of New York Mellon Corp.		45,800		1,953,370
Citigroup, Inc.		97,900		4,026,627
East West Bancorp, Inc.		8,015		422,471
Goldman Sachs Group, Inc.		25,400		8,218,678
JP Morgan Chase & Co.		212,111		30,760,337

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Morgan Stanley		91,900	$	7,505,473
PNC Financial Services Group, Inc.		18,647		2,289,292
Regions Financial Corp.		50,500		868,600
State Street Corp.		18,700		1,252,152
US Bancorp		8,700		287,622
Wells Fargo & Co.		92,929		3,797,079
				71,392,514
Diversified Financial Services — 2.8%
Ally Financial, Inc.		15,300		408,204
American Express Co.		58,497		8,727,167
Ameriprise Financial, Inc.		5,700		1,879,176
Capital One Financial Corp.		19,400		1,882,770
Charles Schwab Corp.		22,600		1,240,740
CME Group, Inc.		6,700		1,341,474
Discover Financial Services		15,400		1,334,102
LPL Financial Holdings, Inc.		3,900		926,835
Raymond James Financial, Inc.		10,600		1,064,558
Stifel Financial Corp.		5,400		331,776
Synchrony Financial		23,900		730,623
T. Rowe Price Group, Inc.		11,700		1,226,979
Visa, Inc. Class A		2,300		529,023
				21,623,427
Insurance — 7.8%
Aflac, Inc.		36,200		2,778,350
Allstate Corp.		18,587		2,070,778
American Financial Group, Inc.		3,900		435,513
American International Group, Inc.		36,200		2,193,720
Arch Capital Group Ltd. (b)		20,800		1,657,968
Assurant, Inc.		2,600		373,308
Berkshire Hathaway, Inc. Class B (b)		26,000		9,107,800
Chubb Ltd.		36,687		7,637,500
Cincinnati Financial Corp.		8,600		879,694
Corebridge Financial, Inc.		52,235		1,031,641
Equitable Holdings, Inc.		23,000		652,970
Fidelity National Financial, Inc.		14,800		611,240
First American Financial Corp.		5,200		293,748
Globe Life, Inc.		4,800		521,904
Hartford Financial Services Group, Inc.		37,376		2,650,332
Loews Corp.		13,800		873,678
Markel Group, Inc. (b)		640		942,394
MetLife, Inc.		124,819		7,852,363
Old Republic International Corp.		15,900		428,346
Primerica, Inc.		1,600		310,416
Principal Financial Group, Inc.		14,300		1,030,601
Progressive Corp.		29,500		4,109,350
Prudential Financial, Inc.		20,300		1,926,267
Reinsurance Group of America, Inc.		3,397		493,210
Travelers Cos., Inc.		40,518		6,616,995
Unum Group		10,700		526,333
W. R. Berkley Corp.		14,300		907,907
				58,914,326
Private Equity — 0.1%
Carlyle Group, Inc.		18,300		551,928

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Real Estate — 0.0%
Jones Lang LaSalle, Inc. (b)		2,500	$	352,950
Real Estate Investment Trusts (REITS) — 1.0%
Equity LifeStyle Properties, Inc.		22,100		1,407,991
Extra Space Storage, Inc.		6,217		755,863
Prologis, Inc.		13,350		1,498,003
Public Storage		8,700		2,292,624
Weyerhaeuser Co.		51,094		1,566,542
				7,521,023
				160,356,168
Industrial — 11.7%
Aerospace & Defense — 1.7%
General Dynamics Corp.		19,200		4,242,624
L3 Harris Technologies, Inc.		12,174		2,119,737
Lockheed Martin Corp.		12,800		5,234,688
Northrop Grumman Corp.		2,400		1,056,456
				12,653,505
Building Materials — 1.0%
Builders FirstSource, Inc. (b)		8,000		995,920
Carrier Global Corp.		29,945		1,652,964
Eagle Materials, Inc.		1,800		299,736
Fortune Brands Innovations, Inc.		7,100		441,336
Johnson Controls International PLC		34,600		1,841,066
Martin Marietta Materials, Inc.		1,620		664,978
Masco Corp.		17,200		919,340
Owens Corning		7,100		968,511
				7,783,851
Electrical Components & Equipment — 0.3%
AMETEK, Inc.		16,045		2,370,809
Electronics — 0.7%
Allegion PLC		4,400		458,480
Arrow Electronics, Inc. (b)		4,900		613,676
Hubbell, Inc.		1,673		524,335
Jabil, Inc.		9,900		1,256,211
Sensata Technologies Holding PLC		8,000		302,560
TD SYNNEX Corp.		4,900		489,314
TE Connectivity Ltd.		13,000		1,605,890
				5,250,466
Engineering & Construction — 0.0%
TopBuild Corp. (b)		1,100		276,760
Environmental Controls — 0.1%
Pentair PLC		8,800		569,800
Veralto Corp. (b)		503		42,534
				612,334

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Hand & Machine Tools — 0.2%
Regal Rexnord Corp.		3,300	$	471,504
Snap-on, Inc.		3,100		790,686
				1,262,190
Machinery – Construction & Mining — 1.1%
Caterpillar, Inc.		30,000		8,190,000
Oshkosh Corp.		3,300		314,919
				8,504,919
Machinery – Diversified — 1.7%
AGCO Corp.		3,850		455,378
Deere & Co.		16,700		6,302,246
Dover Corp.		10,900		1,520,659
IDEX Corp.		7,700		1,601,754
Middleby Corp. (b)		2,700		345,600
Westinghouse Air Brake Technologies Corp.		25,713		2,732,520
				12,958,157
Metal Fabricate & Hardware — 0.0%
Timken Co.		3,100		227,819
Miscellaneous - Manufacturing — 1.4%
Carlisle Cos., Inc.		2,600		674,076
General Electric Co.		43,487		4,807,488
Parker-Hannifin Corp.		6,800		2,648,736
Siemens AG Registered		11,444		1,640,649
Textron, Inc.		15,100		1,179,914
				10,950,863
Packaging & Containers — 0.4%
Berry Global Group, Inc.		6,300		390,033
Crown Holdings, Inc.		9,100		805,168
Graphic Packaging Holding Co.		16,700		372,076
Packaging Corp. of America		6,000		921,300
Sonoco Products Co.		4,700		255,445
				2,744,022
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		2,100		429,618
Transportation — 3.0%
CSX Corp.		231,157		7,108,078
Expeditors International of Washington, Inc.		8,600		985,818
FedEx Corp.		13,800		3,655,896
Knight-Swift Transportation Holdings, Inc.		8,600		431,290
Norfolk Southern Corp.		7,184		1,414,745
Union Pacific Corp.		15,700		3,196,991
United Parcel Service, Inc. Class B		39,600		6,172,452
				22,965,270
				88,990,583

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Technology — 9.4%
Computers — 1.9%
CACI International, Inc. Class A (b)		800	$	251,144
Cognizant Technology Solutions Corp. Class A		25,700		1,740,918
Dell Technologies, Inc. Class C		12,900		888,810
Hewlett Packard Enterprise Co.		86,200		1,497,294
HP, Inc.		85,500		2,197,350
International Business Machines Corp.		43,500		6,103,050
Leidos Holdings, Inc.		7,349		677,284
NetApp, Inc.		10,700		811,916
				14,167,766
Semiconductors — 6.1%
Analog Devices, Inc.		7,600		1,330,684
Applied Materials, Inc.		62,500		8,653,125
KLA Corp.		6,800		3,118,888
Lam Research Corp.		12,006		7,525,001
Microchip Technology, Inc.		7,400		577,570
Micron Technology, Inc.		103,400		7,034,302
NXP Semiconductors NV		17,100		3,418,632
ON Semiconductor Corp. (b)		19,000		1,766,050
QUALCOMM, Inc.		74,000		8,218,440
Skyworks Solutions, Inc.		8,800		867,592
Texas Instruments, Inc.		25,490		4,053,165
				46,563,449
Software — 1.4%
Adobe, Inc. (b)		1,512		770,969
Fiserv, Inc. (b)		71,567		8,084,208
Microsoft Corp.		4,555		1,438,241
Salesforce, Inc. (b)		3,900		790,842
				11,084,260
				71,815,475
Utilities — 3.5%
Electric — 3.5%
Alliant Energy Corp.		12,800		620,160
Ameren Corp.		4,794		358,735
CenterPoint Energy, Inc.		22,400		601,440
Consolidated Edison, Inc.		17,600		1,505,328
Constellation Energy Corp.		29,233		3,188,736
Duke Energy Corp.		40,400		3,565,704
Edison International		18,200		1,151,878
Evergy, Inc.		26,700		1,353,690
Exelon Corp.		64,700		2,445,013
FirstEnergy Corp.		16,964		579,829
NextEra Energy, Inc.		42,100		2,411,909
NRG Energy, Inc.		17,400		670,248
OGE Energy Corp.		10,661		355,331
Pinnacle West Capital Corp.		6,298		464,037
PPL Corp.		40,100		944,756
Public Service Enterprise Group, Inc.		34,300		1,952,013
Sempra		33,900		2,306,217
Southern Co.		24,524		1,587,193

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Vistra Corp.		23,000	$	763,140
				26,825,357
				26,825,357
TOTAL COMMON STOCK (Cost $627,761,667)				746,297,257
TOTAL EQUITIES (Cost $627,761,667)				746,297,257
MUTUAL FUNDS — 1.3%
Diversified Financial Services — 1.3%
iShares Russell 1000 Value ETF		64,600		9,807,572
				9,807,572
TOTAL MUTUAL FUNDS (Cost $9,825,702)				9,807,572
TOTAL LONG-TERM INVESTMENTS (Cost $637,587,369)				756,104,829
SHORT-TERM INVESTMENTS — 0.7%
Investment of Cash Collateral from Securities Loaned — 0.1%
State Street Navigator Securities Lending Government Money Market Portfolio (c)		865,607		865,607
Mutual Fund — 0.1%
T. Rowe Price Government Reserve Investment Fund		903,816		903,816
	Principal Amount
Repurchase Agreement — 0.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (d)	$	4,111,603		4,111,603
TOTAL SHORT-TERM INVESTMENTS (Cost $5,881,026)				5,881,026
TOTAL INVESTMENTS — 100.2% (Cost $643,468,395) (e)				761,985,855
Other Assets/(Liabilities) — (0.2)%				(1,681,514)
NET ASSETS — 100.0%			$	760,304,341

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) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $3,161,503 or 0.42% of net assets. The Fund received $2,371,405 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 $4,112,152. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 2/28/26, and an aggregate market value, including accrued interest, of $4,193,852.

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

MML Equity Rotation Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.9%
COMMON STOCK — 99.9%
Basic Materials — 4.5%
Chemicals — 1.9%
Air Products & Chemicals, Inc.		194	$	54,980
Albemarle Corp.		469		79,749
Ashland, Inc.		132		10,782
Axalta Coating Systems Ltd. (a)		2,028		54,553
Chemours Co.		616		17,279
Dow, Inc.		812		41,867
DuPont de Nemours, Inc.		1,023		76,305
Eastman Chemical Co.		332		25,471
Ecolab, Inc.		286		48,448
Element Solutions, Inc.		651		12,766
FMC Corp.		260		17,412
Linde PLC (LIN US)		78		29,043
LyondellBasell Industries NV Class A		820		77,654
NewMarket Corp.		113		51,419
Olin Corp.		1,163		58,127
PPG Industries, Inc.		582		75,544
RPM International, Inc.		481		45,604
Sherwin-Williams Co.		155		39,533
Valvoline, Inc.		1,835		59,160
Westlake Corp.		310		38,648
				914,344
Iron & Steel — 2.5%
Cleveland-Cliffs, Inc. (a)		714		11,160
Nucor Corp.		1,772		277,052
Reliance Steel & Aluminum Co.		1,297		340,113
Steel Dynamics, Inc.		3,709		397,679
U.S. Steel Corp.		4,763		154,702
				1,180,706
Mining — 0.1%
Freeport-McMoRan, Inc.		571		21,292
Royal Gold, Inc.		202		21,479
Southern Copper Corp.		173		13,025
				55,796
				2,150,846
Communications — 4.9%
Advertising — 0.7%
Interpublic Group of Cos., Inc.		4,912		140,778

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Omnicom Group, Inc.		2,541	$	189,254
				330,032
Internet — 2.8%
Airbnb, Inc. Class A (a)		360		49,396
Alphabet, Inc. Class A (a)		150		19,629
Alphabet, Inc. Class C (a)		138		18,195
Booking Holdings, Inc. (a)		35		107,938
CDW Corp.		1,755		354,089
Coupang, Inc. (a)		1,793		30,481
DoorDash, Inc., Class A (a)		257		20,424
eBay, Inc.		447		19,708
Etsy, Inc. (a)		373		24,088
Expedia Group, Inc. (a)		316		32,570
F5, Inc. (a)		137		22,076
GoDaddy, Inc. Class A (a)		978		72,841
Meta Platforms, Inc. Class A (a)		123		36,926
Netflix, Inc. (a)		101		38,138
Okta, Inc. (a)		152		12,390
Pinterest, Inc. Class A (a)		2,957		79,928
Spotify Technology SA (a)		422		65,258
Uber Technologies, Inc. (a)		290		13,337
VeriSign, Inc. (a)		735		148,860
Zillow Group, Inc. Class A (a)		1,058		47,388
Zillow Group, Inc. Class C (a)		3,146		145,219
				1,358,879
Media — 0.7%
Charter Communications, Inc. Class A (a)		38		16,713
Comcast Corp. Class A		740		32,811
FactSet Research Systems, Inc.		112		48,973
Fox Corp. Class A		724		22,589
Liberty Media Corp-Liberty Formula One Class C (a)		544		33,891
New York Times Co. Class A		418		17,222
News Corp. Class A		3,283		65,857
News Corp. Class B		1,187		24,773
Nexstar Media Group, Inc. Class A		125		17,921
Walt Disney Co. (a)		126		10,212
Warner Bros Discovery, Inc. (a)		1,159		12,587
				303,549
Telecommunications — 0.7%
Arista Networks, Inc. (a)		457		84,056
Cisco Systems, Inc.		275		14,784
Corning, Inc.		2,093		63,774
ESC GCI Liberty Inc (a) (b) (c)		2,102		—
Iridium Communications, Inc.		761		34,618
Juniper Networks, Inc.		734		20,398
Motorola Solutions, Inc.		367		99,912
Viasat, Inc. (a)		1,792		33,080
				350,622
				2,343,082

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Consumer, Cyclical — 19.6%
Airlines — 1.2%
Alaska Air Group, Inc. (a)		1,217	$	45,126
American Airlines Group, Inc. (a)		7,243		92,783
Delta Air Lines, Inc.		4,333		160,321
Southwest Airlines Co.		403		10,909
United Airlines Holdings, Inc. (a)		6,420		271,566
				580,705
Apparel — 1.6%
Capri Holdings Ltd. (a)		1,754		92,278
Columbia Sportswear Co.		135		10,004
Crocs, Inc. (a)		1,438		126,875
Deckers Outdoor Corp. (a)		283		145,487
NIKE, Inc. Class B		148		14,152
PVH Corp.		1,189		90,970
Ralph Lauren Corp.		625		72,556
Skechers USA, Inc. Class A (a)		2,534		124,039
Tapestry, Inc.		3,005		86,394
				762,755
Auto Manufacturers — 1.3%
Cummins, Inc.		331		75,620
Ford Motor Co.		21,614		268,446
General Motors Co.		2,814		92,778
PACCAR, Inc.		1,992		169,360
				606,204
Auto Parts & Equipment — 1.0%
Allison Transmission Holdings, Inc.		1,321		78,018
Aptiv PLC (a)		647		63,788
BorgWarner, Inc.		5,593		225,789
Gentex Corp.		736		23,949
Lear Corp.		438		58,780
Phinia, Inc.		1,119		29,978
				480,302
Distribution & Wholesale — 1.8%
Copart, Inc. (a)		2,210		95,229
Core & Main, Inc. Class A (a)		877		25,301
Fastenal Co.		926		50,597
Ferguson PLC		363		59,703
LKQ Corp.		2,077		102,832
Pool Corp.		140		49,854
SiteOne Landscape Supply, Inc. (a)		489		79,927
W.W. Grainger, Inc.		167		115,537
Watsco, Inc.		306		115,582
WESCO International, Inc.		1,102		158,490
				853,052
Entertainment — 0.5%
Caesars Entertainment, Inc. (a)		853		39,537
Churchill Downs, Inc.		743		86,218
DraftKings, Inc. Class A (a)		485		14,278

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Live Nation Entertainment, Inc. (a)		308	$	25,576
Madison Square Garden Sports Corp.		77		13,575
Marriott Vacations Worldwide Corp.		206		20,730
Vail Resorts, Inc.		98		21,745
				221,659
Food Services — 0.3%
Aramark		3,761		130,507
Home Builders — 3.4%
DR Horton, Inc.		2,848		306,075
Lennar Corp. Class A		3,299		370,247
Lennar Corp. Class B		198		20,241
NVR, Inc. (a)		44		262,385
PulteGroup, Inc.		5,341		395,501
Thor Industries, Inc.		1,032		98,174
Toll Brothers, Inc.		2,751		203,464
				1,656,087
Home Furnishing — 0.5%
Dolby Laboratories, Inc. Class A		533		42,246
Leggett & Platt, Inc.		550		13,975
Tempur Sealy International, Inc.		4,156		180,121
				236,342
Leisure Time — 0.5%
Brunswick Corp.		1,107		87,453
Harley-Davidson, Inc.		673		22,250
Norwegian Cruise Line Holdings Ltd. (a) (d)		917		15,112
Planet Fitness, Inc. Class A (a)		174		8,557
Polaris, Inc.		454		47,280
Royal Caribbean Cruises Ltd. (a)		573		52,796
YETI Holdings, Inc. (a)		445		21,458
				254,906
Lodging — 1.2%
Boyd Gaming Corp.		1,121		68,190
Choice Hotels International, Inc.		98		12,006
Hilton Worldwide Holdings, Inc.		463		69,533
Hyatt Hotels Corp. Class A		702		74,468
Las Vegas Sands Corp.		776		35,572
Marriott International, Inc. Class A		267		52,482
MGM Resorts International		5,762		211,811
Travel & Leisure Co.		424		15,574
Wyndham Hotels & Resorts, Inc.		143		9,944
Wynn Resorts Ltd.		515		47,591
				597,171
Retail — 6.3%
AutoNation, Inc. (a)		607		91,900
AutoZone, Inc. (a)		52		132,079
Bath & Body Works, Inc.		303		10,241
Best Buy Co., Inc.		442		30,706
BJ's Wholesale Club Holdings, Inc. (a)		1,633		116,547
Burlington Stores, Inc. (a)		90		12,177

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
CarMax, Inc. (a)		685	$	48,450
Casey's General Stores, Inc.		427		115,939
Chipotle Mexican Grill, Inc. (a)		40		73,273
Costco Wholesale Corp.		31		17,514
Darden Restaurants, Inc.		1,067		152,816
Dick's Sporting Goods, Inc.		1,497		162,544
Dollar General Corp.		89		9,416
Dollar Tree, Inc. (a)		1,205		128,272
Five Below, Inc. (a)		387		62,268
Floor & Decor Holdings, Inc. Class A (a)		555		50,228
Genuine Parts Co.		1,144		165,171
Lithia Motors, Inc.		47		13,881
Lowe's Cos., Inc.		394		81,889
Lululemon Athletica, Inc. (a)		244		94,089
McDonald's Corp.		73		19,231
MSC Industrial Direct Co., Inc. Class A		657		64,485
Murphy USA, Inc.		363		124,048
O'Reilly Automotive, Inc. (a)		152		138,147
Ollie's Bargain Outlet Holdings, Inc. (a)		420		32,416
Penske Automotive Group, Inc.		481		80,356
RH (a)		208		54,987
Ross Stores, Inc.		1,324		149,546
Starbucks Corp.		805		73,472
Target Corp.		806		89,119
Texas Roadhouse, Inc.		1,177		113,110
TJX Cos., Inc.		1,334		118,566
Tractor Supply Co.		377		76,550
Ulta Beauty, Inc. (a)		271		108,251
Walgreens Boots Alliance, Inc.		342		7,606
Walmart, Inc.		75		11,995
Wendy's Co.		1,990		40,616
Williams-Sonoma, Inc. (d)		141		21,911
Wingstop, Inc.		260		46,758
Yum! Brands, Inc.		577		72,090
				3,012,660
				9,392,350
Consumer, Non-cyclical — 15.7%
Agriculture — 0.3%
Altria Group, Inc.		951		39,989
Archer-Daniels-Midland Co.		691		52,115
Darling Ingredients, Inc. (a)		629		32,834
Philip Morris International, Inc.		122		11,295
				136,233
Beverages — 0.5%
Boston Beer Co., Inc. Class A (a)		41		15,971
Celsius Holdings, Inc. (a)		271		46,504
Constellation Brands, Inc. Class A		83		20,860
Molson Coors Beverage Co. Class B		1,375		87,436
Monster Beverage Corp. (a)		703		37,224
PepsiCo, Inc.		95		16,097
				224,092

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Biotechnology — 0.9%
Apellis Pharmaceuticals, Inc. (a)		185	$	7,037
Biogen, Inc. (a)		214		55,000
BioMarin Pharmaceutical, Inc. (a)		436		38,577
Corteva, Inc.		547		27,985
Exelixis, Inc. (a)		1,187		25,936
Gilead Sciences, Inc.		867		64,973
Horizon Therapeutics PLC (a)		441		51,019
Karuna Therapeutics, Inc. (a)		94		15,895
Moderna, Inc. (a)		275		28,405
Regeneron Pharmaceuticals, Inc. (a)		46		37,856
Sarepta Therapeutics, Inc. (a)		234		28,366
United Therapeutics Corp. (a)		46		10,390
Vertex Pharmaceuticals, Inc. (a)		184		63,984
				455,423
Commercial Services — 3.2%
Automatic Data Processing, Inc.		85		20,449
Booz Allen Hamilton Holding Corp.		422		46,112
Bright Horizons Family Solutions, Inc. (a)		353		28,755
Cintas Corp.		117		56,278
CoStar Group, Inc. (a)		458		35,216
Equifax, Inc.		216		39,567
Euronet Worldwide, Inc. (a)		368		29,212
FleetCor Technologies, Inc. (a)		114		29,109
FTI Consulting, Inc. (a)		324		57,805
Gartner, Inc. (a)		513		176,272
Global Payments, Inc.		274		31,617
Grand Canyon Education, Inc. (a)		314		36,700
ManpowerGroup, Inc.		171		12,538
MarketAxess Holdings, Inc.		124		26,491
Moody's Corp.		118		37,308
Quanta Services, Inc.		645		120,660
R1 RCM, Inc. (a)		995		14,995
RB Global, Inc.		836		52,250
Robert Half, Inc.		182		13,337
Rollins, Inc.		537		20,046
S&P Global, Inc.		48		17,540
Service Corp. International		316		18,056
Shift4 Payments, Inc. Class A (a)		710		39,313
Toast, Inc., Class A (a) (d)		3,554		66,566
U-Haul Holding Co. (UHAL US) (a) (d)		198		10,805
U-Haul Holding Co. (UHAL/B US)		410		21,480
United Rentals, Inc.		720		320,090
Verisk Analytics, Inc.		275		64,966
WEX, Inc. (a)		117		22,006
WillScot Mobile Mini Holdings Corp. (a)		2,030		84,428
				1,549,967
Cosmetics & Personal Care — 0.2%
Colgate-Palmolive Co.		387		27,519
Coty, Inc. Class A (a)		4,739		51,987
Estee Lauder Cos., Inc. Class A		114		16,479
Procter & Gamble Co.		80		11,669
				107,654

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Food — 2.7%
Albertsons Cos., Inc. Class A		1,165	$	26,504
Campbell Soup Co.		784		32,207
Conagra Brands, Inc.		2,436		66,795
Flowers Foods, Inc.		1,409		31,252
General Mills, Inc.		1,141		73,013
Hershey Co.		314		62,825
Ingredion, Inc.		1,075		105,780
J. M. Smucker Co.		648		79,646
Kellogg Co.		433		25,768
Kraft Heinz Co.		1,089		36,634
Kroger Co.		1,989		89,008
Lamb Weston Holdings, Inc.		964		89,131
McCormick & Co., Inc.		318		24,053
Mondelez International, Inc. Class A		817		56,700
Performance Food Group Co. (a)		3,356		197,534
Post Holdings, Inc. (a)		661		56,674
Sysco Corp.		275		18,164
US Foods Holding Corp. (a)		5,645		224,106
				1,295,794
Health Care – Products — 2.3%
10X Genomics, Inc. Class A (a)		509		20,996
Align Technology, Inc. (a)		264		80,605
Boston Scientific Corp. (a)		1,351		71,333
Bruker Corp.		625		38,938
Cooper Cos., Inc.		178		56,606
Edwards Lifesciences Corp. (a)		644		44,616
Envista Holdings Corp. (a)		321		8,949
Exact Sciences Corp. (a)		346		23,604
GE HealthCare Technologies, Inc. (a)		562		38,239
Globus Medical, Inc. Class A (a)		371		18,420
Hologic, Inc. (a)		740		51,356
IDEXX Laboratories, Inc. (a)		161		70,400
Inspire Medical Systems, Inc. (a)		157		31,155
Insulet Corp. (a)		137		21,850
Intuitive Surgical, Inc. (a)		159		46,474
Masimo Corp. (a)		237		20,780
Medtronic PLC		246		19,277
Novocure Ltd. (a)		327		5,281
Penumbra, Inc. (a)		197		47,656
QIAGEN NV (a)		317		12,839
Repligen Corp. (a)		180		28,622
ResMed, Inc.		133		19,667
Shockwave Medical, Inc. (a)		261		51,965
Steris PLC		126		27,647
Stryker Corp.		220		60,119
Teleflex, Inc.		101		19,837
Thermo Fisher Scientific, Inc.		20		10,123
West Pharmaceutical Services, Inc.		224		84,047
Zimmer Biomet Holdings, Inc.		607		68,118
				1,099,519
Health Care – Services — 2.5%
Acadia Healthcare Co., Inc. (a)		573		40,288
agilon health, Inc. (a) (d)		924		16,410

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Charles River Laboratories International, Inc. (a)		274	$	53,699
Chemed Corp.		88		45,734
DaVita, Inc. (a)		1,345		127,143
Elevance Health, Inc.		97		42,236
Encompass Health Corp.		1,631		109,538
Fortrea Holdings, Inc. (a)		105		3,002
HCA Healthcare, Inc.		635		156,197
Humana, Inc.		161		78,330
ICON PLC (a)		86		21,177
IQVIA Holdings, Inc. (a)		82		16,134
Laboratory Corp. of America Holdings		105		21,110
Medpace Holdings, Inc. (a)		117		28,329
Molina Healthcare, Inc. (a)		324		106,236
Quest Diagnostics, Inc.		198		24,128
Tenet Healthcare Corp. (a)		2,514		165,647
Universal Health Services, Inc. Class B		1,105		138,932
				1,194,270
Household Products & Wares — 0.6%
Avery Dennison Corp.		495		90,422
Church & Dwight Co., Inc.		619		56,719
Clorox Co.		504		66,054
Kimberly-Clark Corp.		558		67,434
Reynolds Consumer Products, Inc.		433		11,098
				291,727
Pharmaceuticals — 2.5%
AbbVie, Inc.		165		24,595
Becton Dickinson & Co.		81		20,941
Cardinal Health, Inc.		5,087		441,653
Cencora, Inc.		1,001		180,150
Cigna Group		212		60,647
Dexcom, Inc. (a)		473		44,131
Henry Schein, Inc. (a)		553		41,060
McKesson Corp.		642		279,174
Merck & Co., Inc.		241		24,811
Neurocrine Biosciences, Inc. (a)		130		14,625
Perrigo Co. PLC		298		9,521
Premier, Inc. Class A		462		9,933
Zoetis, Inc.		175		30,446
				1,181,687
				7,536,366
Energy — 4.7%
Energy – Alternate Sources — 0.2%
Enphase Energy, Inc. (a)		104		12,496
First Solar, Inc. (a)		499		80,633
				93,129
Oil & Gas — 2.7%
Chesapeake Energy Corp. (d)		1,017		87,696
Chevron Corp.		354		59,691
ConocoPhillips		522		62,536
Coterra Energy, Inc.		1,601		43,307

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Devon Energy Corp.		618	$	29,479
Diamondback Energy, Inc.		577		89,366
EOG Resources, Inc.		339		42,972
EQT Corp.		386		15,664
Exxon Mobil Corp.		208		24,457
Hess Corp.		508		77,724
HF Sinclair Corp.		388		22,089
Marathon Oil Corp.		642		17,173
Marathon Petroleum Corp.		2,263		342,482
Occidental Petroleum Corp.		546		35,424
Phillips 66		1,304		156,676
Pioneer Natural Resources Co.		257		58,994
Range Resources Corp.		2,177		70,556
Texas Pacific Land Corp.		7		12,765
Valero Energy Corp.		241		34,152
				1,283,203
Oil & Gas Services — 0.6%
Baker Hughes Co.		709		25,042
Halliburton Co.		345		13,972
Schlumberger NV		909		52,995
TechnipFMC PLC		10,932		222,357
				314,366
Pipelines — 1.2%
Antero Midstream Corp.		4,663		55,863
Cheniere Energy, Inc.		556		92,274
DT Midstream, Inc. (a)		292		15,453
Kinder Morgan, Inc.		3,062		50,768
ONEOK, Inc.		2,789		176,906
Targa Resources Corp.		1,859		159,353
Williams Cos., Inc.		971		32,713
				583,330
				2,274,028
Financial — 13.9%
Banks — 1.4%
Bank of New York Mellon Corp.		1,100		46,915
Bank OZK		428		15,866
BOK Financial Corp.		259		20,715
Citigroup, Inc.		362		14,889
Columbia Banking System, Inc.		930		18,879
First Citizens BancShares, Inc. Class A		87		120,069
First Horizon Corp.		1,964		21,643
FNB Corp.		2,687		28,993
Goldman Sachs Group, Inc.		224		72,480
Huntington Bancshares, Inc.		2,358		24,523
JP Morgan Chase & Co.		131		18,998
Morgan Stanley		137		11,189
NU Holdings Ltd. Class A (a)		4,972		36,047
Regions Financial Corp.		843		14,500
State Street Corp.		1,765		118,184
Wells Fargo & Co.		596		24,352

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Western Alliance Bancorp		1,218	$	55,991
				664,233
Diversified Financial Services — 3.4%
Affiliated Managers Group, Inc.		511		66,604
Air Lease Corp.		1,558		61,401
American Express Co.		73		10,891
Ameriprise Financial, Inc.		581		191,544
Apollo Global Management, Inc.		950		85,272
BlackRock, Inc.		49		31,678
Blue Owl Capital, Inc.		1,804		23,380
Capital One Financial Corp.		155		15,043
Cboe Global Markets, Inc.		555		86,696
Charles Schwab Corp.		215		11,803
Discover Financial Services		1,307		113,225
Evercore, Inc. Class A		653		90,036
Franklin Resources, Inc.		1,467		36,059
Houlihan Lokey, Inc.		250		26,780
Interactive Brokers Group, Inc. Class A		1,843		159,530
Intercontinental Exchange, Inc.		445		48,959
Invesco Ltd.		963		13,983
Janus Henderson Group PLC		1,193		30,803
Jefferies Financial Group, Inc.		1,153		42,234
LPL Financial Holdings, Inc.		406		96,486
Nasdaq, Inc.		607		29,494
OneMain Holdings, Inc.		1,035		41,493
Raymond James Financial, Inc.		247		24,806
Rocket Cos., Inc. Class A (a)		3,117		25,497
SEI Investments Co.		351		21,141
SLM Corp.		2,249		30,631
Stifel Financial Corp.		440		27,034
Synchrony Financial		1,493		45,641
T. Rowe Price Group, Inc.		259		27,161
TPG, Inc.		590		17,771
Tradeweb Markets, Inc. Class A		199		15,960
UWM Holdings Corp. (d)		2,312		11,213
Voya Financial, Inc.		1,168		77,614
XP, Inc. Class A		497		11,456
				1,649,319
Insurance — 6.9%
Aflac, Inc.		2,678		205,537
Allstate Corp.		808		90,019
American Financial Group, Inc.		101		11,279
American International Group, Inc.		1,234		74,780
Aon PLC Class A		244		79,110
Arch Capital Group Ltd. (a)		3,616		288,231
Arthur J Gallagher & Co.		568		129,464
Assured Guaranty Ltd.		736		44,543
Axis Capital Holdings Ltd.		348		19,617
Brighthouse Financial, Inc. (a)		219		10,718
Brown & Brown, Inc.		1,450		101,268
Chubb Ltd.		247		51,420
Cincinnati Financial Corp.		106		10,843
Corebridge Financial, Inc.		1,383		27,314
Equitable Holdings, Inc.		834		23,677
Everest Group Ltd.		657		244,187

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Fidelity National Financial, Inc.		2,071	$	85,532
First American Financial Corp.		958		54,117
Globe Life, Inc.		705		76,655
Hartford Financial Services Group, Inc.		1,388		98,423
Kinsale Capital Group, Inc.		239		98,977
Loews Corp.		611		38,682
Markel Group, Inc. (a)		22		32,395
Marsh & McLennan Cos., Inc.		307		58,422
MetLife, Inc.		214		13,463
MGIC Investment Corp.		7,175		119,751
Old Republic International Corp.		4,574		123,224
Primerica, Inc.		723		140,269
Principal Financial Group, Inc.		1,500		108,105
Progressive Corp.		614		85,530
Prudential Financial, Inc.		204		19,358
Reinsurance Group of America, Inc.		1,202		174,518
RenaissanceRe Holdings Ltd.		295		58,386
RLI Corp.		268		36,419
Ryan Specialty Holdings, Inc. (a)		1,484		71,826
Travelers Cos., Inc.		494		80,675
Unum Group		4,059		199,662
W. R. Berkley Corp.		255		16,190
White Mountains Insurance Group Ltd.		8		11,966
Willis Towers Watson PLC		377		78,778
				3,293,330
Private Equity — 0.2%
Ares Management Corp. Class A		624		64,191
Blackstone, Inc.		144		15,428
Carlyle Group, Inc.		442		13,331
				92,950
Real Estate — 0.1%
CBRE Group, Inc. Class A (a)		639		47,196
Howard Hughes Holdings, Inc. (a)		251		18,607
				65,803
Real Estate Investment Trusts (REITS) — 1.9%
American Homes 4 Rent Class A		459		15,464
Annaly Capital Management, Inc.		2,429		45,689
AvalonBay Communities, Inc.		65		11,163
Brixmor Property Group, Inc.		1,404		29,175
CubeSmart		745		28,407
EastGroup Properties, Inc.		119		19,817
EPR Properties		238		9,887
Equinix, Inc.		29		21,062
Extra Space Storage, Inc.		369		44,863
Federal Realty Investment Trust		117		10,604
First Industrial Realty Trust, Inc.		567		26,984
Gaming & Leisure Properties, Inc.		937		42,680
Host Hotels & Resorts, Inc.		3,475		55,843
Invitation Homes, Inc.		621		19,679
Iron Mountain, Inc.		1,447		86,024
Kimco Realty Corp.		739		12,999
Lamar Advertising Co. Class A		316		26,376
Mid-America Apartment Communities, Inc.		64		8,234

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
NNN REIT, Inc.		496	$	17,529
Omega Healthcare Investors, Inc.		1,212		40,190
Park Hotels & Resorts, Inc.		1,024		12,616
Prologis, Inc.		185		20,759
Public Storage		64		16,865
Regency Centers Corp.		267		15,870
Rithm Capital Corp.		4,378		40,672
Simon Property Group, Inc.		733		79,186
Spirit Realty Capital, Inc.		628		21,057
STAG Industrial, Inc.		875		30,196
VICI Properties, Inc.		1,547		45,018
Welltower, Inc.		131		10,731
Weyerhaeuser Co.		749		22,964
				888,603
Savings & Loans — 0.0%
New York Community Bancorp, Inc.		1,004		11,385
				6,665,623
Industrial — 19.3%
Aerospace & Defense — 0.9%
Boeing Co. (a)		175		33,544
Curtiss-Wright Corp.		299		58,494
General Dynamics Corp.		99		21,876
HEICO Corp.		136		22,023
HEICO Corp. Class A		238		30,754
Hexcel Corp.		774		50,418
Howmet Aerospace, Inc.		1,880		86,950
Lockheed Martin Corp.		44		17,994
Northrop Grumman Corp.		37		16,287
RTX Corp.		175		12,595
TransDigm Group, Inc. (a)		102		85,999
				436,934
Building Materials — 3.8%
AZEK Co., Inc. (a)		1,212		36,045
Builders FirstSource, Inc. (a)		3,073		382,558
Carrier Global Corp.		3,463		191,158
Eagle Materials, Inc.		626		104,242
Fortune Brands Innovations, Inc.		1,442		89,635
Johnson Controls International PLC		1,795		95,512
Lennox International, Inc.		328		122,816
Louisiana-Pacific Corp.		1,115		61,626
Martin Marietta Materials, Inc.		165		67,729
Masco Corp.		1,037		55,428
MDU Resources Group, Inc.		1,945		38,083
Owens Corning		2,108		287,552
Trane Technologies PLC		749		151,980
Trex Co., Inc. (a)		523		32,232
Vulcan Materials Co.		418		84,444
				1,801,040
Electrical Components & Equipment — 0.5%
Acuity Brands, Inc.		156		26,568
AMETEK, Inc.		533		78,756

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Emerson Electric Co.		531	$	51,279
Littelfuse, Inc.		70		17,312
Universal Display Corp.		347		54,476
				228,391
Electronics — 3.2%
Agilent Technologies, Inc.		187		20,910
Allegion PLC		225		23,445
Amphenol Corp. Class A		1,687		141,691
Arrow Electronics, Inc. (a)		1,427		178,717
Avnet, Inc.		1,414		68,141
Fortive Corp.		839		62,220
Garmin Ltd.		411		43,237
Honeywell International, Inc.		80		14,779
Hubbell, Inc.		371		116,275
Jabil, Inc.		3,222		408,840
Keysight Technologies, Inc. (a)		432		57,158
Mettler-Toledo International, Inc. (a)		36		39,891
National Instruments Corp.		2,131		127,050
nVent Electric PLC		1,741		92,256
Sensata Technologies Holding PLC		222		8,396
TD SYNNEX Corp.		388		38,746
Vontier Corp.		1,752		54,172
Woodward, Inc.		294		36,532
				1,532,456
Engineering & Construction — 1.0%
AECOM		1,167		96,908
EMCOR Group, Inc.		977		205,551
Jacobs Solutions, Inc.		175		23,887
MasTec, Inc. (a)		547		39,368
TopBuild Corp. (a)		449		112,968
				478,682
Environmental Controls — 0.8%
Clean Harbors, Inc. (a)		1,062		177,736
Pentair PLC		1,048		67,858
Republic Services, Inc.		308		43,893
Stericycle, Inc. (a)		375		16,766
Tetra Tech, Inc.		246		37,400
Waste Management, Inc.		307		46,799
				390,452
Hand & Machine Tools — 0.6%
Lincoln Electric Holdings, Inc.		489		88,895
MSA Safety, Inc.		163		25,697
Regal Rexnord Corp.		662		94,587
Snap-on, Inc.		328		83,660
				292,839
Machinery – Construction & Mining — 0.6%
BWX Technologies, Inc.		831		62,308
Caterpillar, Inc.		190		51,870
Oshkosh Corp.		211		20,136

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Vertiv Holdings Co.		4,508	$	167,698
				302,012
Machinery – Diversified — 2.2%
AGCO Corp.		689		81,495
CNH Industrial NV		6,672		80,731
Cognex Corp.		765		32,467
Deere & Co.		54		20,378
Dover Corp.		414		57,757
Esab Corp.		777		54,561
Flowserve Corp.		1,384		55,042
Gates Industrial Corp. PLC (a)		815		9,462
Graco, Inc.		804		58,595
IDEX Corp.		206		42,852
Ingersoll Rand, Inc.		1,583		100,869
Middleby Corp. (a)		255		32,640
Nordson Corp.		173		38,608
Otis Worldwide Corp.		1,054		84,647
Rockwell Automation, Inc.		324		92,622
Toro Co.		840		69,804
Westinghouse Air Brake Technologies Corp.		514		54,623
Xylem, Inc.		831		75,646
				1,042,799
Metal Fabricate & Hardware — 0.6%
Advanced Drainage Systems, Inc.		870		99,032
RBC Bearings, Inc. (a)		167		39,100
Timken Co.		1,442		105,972
Valmont Industries, Inc.		247		59,332
				303,436
Miscellaneous - Manufacturing — 1.6%
A.O. Smith Corp.		652		43,117
Axon Enterprise, Inc. (a)		343		68,253
Carlisle Cos., Inc.		163		42,259
Donaldson Co., Inc.		1,265		75,445
Eaton Corp. PLC		422		90,004
General Electric Co.		803		88,772
Illinois Tool Works, Inc.		269		61,953
ITT, Inc.		682		66,775
Parker-Hannifin Corp.		335		130,489
Teledyne Technologies, Inc. (a)		131		53,524
Textron, Inc.		612		47,822
				768,413
Packaging & Containers — 0.9%
Amcor PLC		1,081		9,902
AptarGroup, Inc.		358		44,764
Ardagh Group SA (a) (b) (c) (d)		463		2,180
Ball Corp.		245		12,196
Berry Global Group, Inc.		1,452		89,893
Crown Holdings, Inc.		243		21,501
Graphic Packaging Holding Co.		5,777		128,712
Packaging Corp. of America		132		20,269
Silgan Holdings, Inc.		1,521		65,570

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Sonoco Products Co.		930	$	50,545
				445,532
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		106		21,685
Transportation — 2.6%
C.H. Robinson Worldwide, Inc.		389		33,505
CSX Corp.		1,157		35,578
Expeditors International of Washington, Inc.		804		92,162
FedEx Corp.		554		146,766
GXO Logistics, Inc. (a)		2,156		126,449
JB Hunt Transport Services, Inc.		196		36,950
Kirby Corp. (a)		446		36,929
Knight-Swift Transportation Holdings, Inc.		1,766		88,565
Landstar System, Inc.		551		97,494
Norfolk Southern Corp.		128		25,207
Old Dominion Freight Line, Inc.		245		100,239
Ryder System, Inc.		207		22,139
Saia, Inc. (a)		347		138,332
Schneider National, Inc. Class B		797		22,069
United Parcel Service, Inc. Class B		127		19,795
XPO, Inc. (a)		2,837		211,810
				1,233,989
				9,278,660
Technology — 14.6%
Computers — 3.1%
Amdocs Ltd.		1,495		126,313
Apple, Inc.		446		76,360
CACI International, Inc. Class A (a)		349		109,562
Cognizant Technology Solutions Corp. Class A		991		67,130
Crane NXT Co.		1,198		66,573
Crowdstrike Holdings, Inc. Class A (a)		202		33,811
DXC Technology Co. (a)		1,503		31,307
Fortinet, Inc. (a)		2,349		137,839
Hewlett Packard Enterprise Co.		11,389		197,827
HP, Inc.		2,543		65,355
International Business Machines Corp.		215		30,164
KBR, Inc.		2,691		158,608
Kyndryl Holdings, Inc. (a)		5,108		77,131
Leidos Holdings, Inc.		349		32,164
NetApp, Inc.		1,316		99,858
Pure Storage, Inc. Class A (a)		2,168		77,224
Science Applications International Corp.		1,104		116,516
				1,503,742
Office & Business Equipment — 0.1%
Zebra Technologies Corp. Class A (a)		201		47,542
Semiconductors — 5.0%
Advanced Micro Devices, Inc. (a)		277		28,481
Allegro MicroSystems, Inc. (a)		1,455		46,473
Analog Devices, Inc.		588		102,953
Applied Materials, Inc.		1,399		193,692

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Broadcom, Inc.		42	$	34,884
Cirrus Logic, Inc. (a)		725		53,621
Entegris, Inc.		539		50,618
IPG Photonics Corp. (a)		288		29,244
KLA Corp.		587		269,233
Lam Research Corp.		343		214,982
Lattice Semiconductor Corp. (a)		2,116		181,828
Marvell Technology, Inc.		254		13,749
Microchip Technology, Inc.		3,908		305,019
Micron Technology, Inc.		2,747		186,878
Monolithic Power Systems, Inc.		134		61,908
NVIDIA Corp.		67		29,144
ON Semiconductor Corp. (a)		4,248		394,852
Qorvo, Inc. (a)		166		15,848
Skyworks Solutions, Inc.		794		78,280
Teradyne, Inc.		690		69,317
Texas Instruments, Inc.		279		44,364
				2,405,368
Software — 6.4%
Activision Blizzard, Inc.		316		29,587
Adobe, Inc. (a)		117		59,658
Akamai Technologies, Inc. (a)		270		28,766
ANSYS, Inc. (a)		285		84,802
Atlassian Corp. Class A (a)		627		126,347
Autodesk, Inc. (a)		827		171,115
Bentley Systems, Inc. Class B Class B		1,581		79,303
Broadridge Financial Solutions, Inc.		181		32,408
Cadence Design Systems, Inc. (a)		627		146,906
Ceridian HCM Holding, Inc. (a)		1,028		69,750
Cloudflare, Inc. Class A (a)		1,361		85,797
Confluent, Inc. Class A (a)		290		8,587
DoubleVerify Holdings, Inc. (a)		1,222		34,155
Dropbox, Inc. Class A (a)		3,982		108,430
Dynatrace, Inc. (a)		1,501		70,142
Electronic Arts, Inc.		108		13,003
Fair Isaac Corp. (a)		105		91,196
Fiserv, Inc. (a)		535		60,434
HashiCorp, Inc. Class A (a)		491		11,209
HubSpot, Inc. (a)		286		140,855
Intuit, Inc.		151		77,152
Manhattan Associates, Inc. (a)		720		142,315
Microsoft Corp.		185		58,414
MongoDB, Inc. (a)		107		37,007
MSCI, Inc.		133		68,240
New Relic, Inc. (a)		407		34,847
Nutanix, Inc. Class A (a)		673		23,474
Oracle Corp.		262		27,751
Palantir Technologies, Inc. Class A (a)		3,998		63,968
Paycom Software, Inc.		179		46,409
Procore Technologies, Inc. (a)		352		22,993
PTC, Inc. (a)		790		111,927
ROBLOX Corp. Class A (a)		1,114		32,261
Roper Technologies, Inc.		236		114,290
Salesforce, Inc. (a)		182		36,906
ServiceNow, Inc. (a)		69		38,568
Smartsheet, Inc. Class A (a)		837		33,865
Snowflake, Inc. Class A (a)		700		106,939

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Splunk, Inc. (a)		297	$	43,436
SS&C Technologies Holdings, Inc.		698		36,673
Synopsys, Inc. (a)		223		102,350
Take-Two Interactive Software, Inc. (a)		82		11,512
Teradata Corp. (a)		1,212		54,564
Tyler Technologies, Inc. (a)		248		95,763
Veeva Systems, Inc. Class A (a)		97		19,735
VMware, Inc. Class A (a)		158		26,304
Workday, Inc. Class A (a)		440		94,534
ZoomInfo Technologies, Inc. (a)		1,829		29,996
				3,044,643
				7,001,295
Utilities — 2.7%
Electric — 2.4%
AES Corp.		2,059		31,297
Alliant Energy Corp.		232		11,240
Ameren Corp.		378		28,286
American Electric Power Co., Inc.		297		22,340
Brookfield Renewable Corp. Class A		426		10,198
CenterPoint Energy, Inc.		1,394		37,429
CMS Energy Corp.		260		13,809
Consolidated Edison, Inc.		714		61,068
Constellation Energy Corp.		686		74,829
DTE Energy Co.		148		14,693
Duke Energy Corp.		137		12,092
Edison International		1,303		82,467
Entergy Corp.		296		27,380
Evergy, Inc.		429		21,750
Eversource Energy		232		13,491
Exelon Corp.		602		22,750
FirstEnergy Corp.		1,271		43,443
IDACORP, Inc.		230		21,540
NextEra Energy, Inc.		227		13,005
NRG Energy, Inc.		1,331		51,270
OGE Energy Corp.		1,029		34,297
PG&E Corp. (a)		16,965		273,646
Pinnacle West Capital Corp.		1,097		80,827
PPL Corp.		1,459		34,374
Public Service Enterprise Group, Inc.		432		24,585
Sempra		345		23,470
Southern Co.		574		37,149
WEC Energy Group, Inc.		257		20,701
Xcel Energy, Inc.		500		28,610
				1,172,036
Gas — 0.2%
Atmos Energy Corp.		414		43,855
NiSource, Inc.		1,543		38,081
				81,936
Water — 0.1%
American Water Works Co., Inc.		171		21,175

MML Equity Rotation Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Essential Utilities, Inc.		238	$	8,170
				29,345
				1,283,317
TOTAL COMMON STOCK (Cost $49,846,386)				47,925,567
TOTAL EQUITIES (Cost $49,846,386)				47,925,567
TOTAL LONG-TERM INVESTMENTS (Cost $49,846,386)				47,925,567
SHORT-TERM INVESTMENTS — 0.0%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		5,277		5,277
TOTAL SHORT-TERM INVESTMENTS (Cost $5,277)				5,277
TOTAL INVESTMENTS — 99.9% (Cost $49,851,663) (f)				47,930,844
Other Assets/(Liabilities) — 0.1%				48,052
NET ASSETS — 100.0%			$	47,978,896

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Investment is valued using significant unobservable inputs.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2023, these securities amounted to a value of $2,180 or 0.00% of net assets.

(d) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $239,625 or 0.50% of net assets. The Fund received $240,395 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

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

MML High Yield Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 97.4%
BANK LOANS — 3.6%
Aerospace & Defense — 0.3%
Barnes Group, Inc., Term Loan B, 3 mo. USD Term SOFR + 3.000%
8.416% VRN 9/03/30	$	142,918	$	142,989
Chemicals — 0.8%
LSF11 A5 Holdco LLC
Term Loan, 1 mo. USD Term SOFR + 3.500%
8.810% VRN 10/15/28		127,500		124,345
2023 Incremental Term Loan B, 1 mo. USD Term SOFR + 4.250%
9.666% VRN 10/15/28		273,021		268,925
				393,270
Cosmetics & Personal Care — 0.4%
Journey Personal Care Corp., 2021 Term Loan B, 6 mo. USD LIBOR + 4.250%
9.981% VRN 3/01/28		198,477		186,568
Health Care – Products — 0.4%
Bausch & Lomb Corp., 2023 Incremental Term Loan,
0.000% 9/14/23 (a)		204,940		202,122
Internet — 0.3%
MH Sub I LLC, 2023 Term Loan, 1 mo. USD Term SOFR + 4.250%
9.566% VRN 5/03/28		173,455		167,573
Investment Companies — 0.3%
GIP Pilot Acquisition Partners LP, Term Loan,
0.000% 9/18/30 (a)		151,707		151,138
Lodging — 0.4%
Four Seasons Hotels Ltd., 2023 Term Loan B, 1 mo. USD Term SOFR + 2.500%
7.916% VRN 11/30/29		179,424		179,573
Packaging & Containers — 0.2%
Clydesdale Acquisition Holdings, Inc., Term Loan B, 1 mo. USD Term SOFR + 4.175%
9.591% VRN 4/13/29		94,767		93,373
Software — 0.3%
Quest Software US Holdings, Inc., 2022 2nd Lien Term Loan, 3 mo. USD Term SOFR + 7.500%
13.019% VRN 2/01/30		207,426		141,049
Telecommunications — 0.2%
Intelsat Jackson Holdings SA, 2021 Exit Term Loan B, 3 mo. USD Term SOFR + 4.250%
9.772% VRN 2/01/29		124,466		124,070
TOTAL BANK LOANS (Cost $1,821,208)			$	1,781,725

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CORPORATE DEBT — 93.8%
Advertising — 0.7%
Clear Channel Outdoor Holdings, Inc.
9.000% 9/15/28 (b)	$	92,000	$	91,111
CMG Media Corp.
8.875% 12/15/27 (b)		120,000		93,927
Stagwell Global LLC
5.625% 8/15/29 (b)		220,000		177,650
				362,688
Aerospace & Defense — 0.5%
TransDigm, Inc.
6.750% 8/15/28 (b)		34,000		33,473
Triumph Group, Inc.
7.750% 8/15/25 (c)		64,000		60,800
9.000% 3/15/28 (b)		164,000		162,164
				256,437
Agriculture — 0.2%
Darling Ingredients, Inc.
6.000% 6/15/30 (b)		130,000		123,075
Airlines — 2.6%
Allegiant Travel Co.
7.250% 8/15/27 (b)		262,000		246,608
American Airlines, Inc./AAdvantage Loyalty IP Ltd.
5.500% 4/20/26 (b)		490,417		478,972
5.750% 4/20/29 (b)		229,000		212,982
Hawaiian Brand Intellectual Property Ltd./HawaiianMiles Loyalty Ltd.
5.750% 1/20/26 (b)		135,022		121,500
United Airlines, Inc.
4.375% 4/15/26 (b)		122,000		112,824
4.625% 4/15/29 (b)		121,000		104,003
				1,276,889
Auto Manufacturers — 1.7%
Ford Motor Co.
3.250% 2/12/32		434,000		334,468
7.450% 7/16/31		153,000		158,733
Ford Motor Credit Co. LLC
4.000% 11/13/30		402,000		335,748
				828,949
Auto Parts & Equipment — 0.5%
Adient Global Holdings Ltd.
4.875% 8/15/26 (b)		277,000		261,250
Biotechnology — 0.2%
Emergent BioSolutions, Inc.
3.875% 8/15/28 (b)		230,000		96,040

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Building Materials — 2.1%
Emerald Debt Merger Sub LLC
6.625% 12/15/30 (b)	$	326,000	$	313,832
Knife River Corp.
7.750% 5/01/31 (b)		152,000		152,310
New Enterprise Stone & Lime Co., Inc.
9.750% 7/15/28 (b)		602,000		594,475
				1,060,617
Chemicals — 4.6%
Avient Corp.
7.125% 8/01/30 (b)		187,000		183,707
Celanese US Holdings LLC
6.379% 7/15/32 (c)		374,000		360,357
Consolidated Energy Finance SA
5.625% 10/15/28 (b)		595,000		491,619
LSF11 A5 HoldCo LLC
6.625% 10/15/29 (b)		294,000		244,432
Methanex Corp.
5.125% 10/15/27		144,000		132,836
Olympus Water US Holding Corp.
4.250% 10/01/28 (b)		326,000		265,760
6.250% 10/01/29 (b) (c)		459,000		354,677
Polar US Borrower LLC/Schenectady International Group, Inc.
6.750% 5/15/26 (b)		171,000		85,500
Tronox, Inc.
4.625% 3/15/29 (b)		97,000		78,280
Vibrantz Technologies, Inc.
9.000% 2/15/30 (b) (c)		63,000		50,138
				2,247,306
Coal — 0.6%
Coronado Finance Pty. Ltd.
10.750% 5/15/26 (b)		290,000		300,157
Commercial Services — 3.0%
Alta Equipment Group, Inc.
5.625% 4/15/26 (b)		378,000		348,233
APi Group DE, Inc.
4.750% 10/15/29 (b)		372,000		325,490
Carriage Services, Inc.
4.250% 5/15/29 (b)		92,000		78,695
PECF USS Intermediate Holding III Corp.
8.000% 11/15/29 (b)		77,000		41,773
Prime Security Services Borrower LLC/Prime Finance, Inc.
6.250% 1/15/28 (b)		418,000		387,138
PROG Holdings, Inc.
6.000% 11/15/29 (b)		294,000		256,515
Sabre Global, Inc.
8.625% 6/01/27 (b)		21,000		17,804
				1,455,648
Computers — 0.5%
Presidio Holdings, Inc.
8.250% 2/01/28 (b)		137,000		130,931

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Seagate HDD Cayman
9.625% 12/01/32 (b)	$	100,620	$	108,422
				239,353
Cosmetics & Personal Care — 0.6%
Coty, Inc./HFC Prestige Products, Inc./HFC Prestige International US LLC
4.750% 1/15/29 (b)		289,000		260,611
6.625% 7/15/30 (b)		43,000		41,983
				302,594
Distribution & Wholesale — 0.7%
American Builders & Contractors Supply Co., Inc.
3.875% 11/15/29 (b)		185,000		154,165
Resideo Funding, Inc.
4.000% 9/01/29 (b) (c)		243,000		199,644
				353,809
Diversified Financial Services — 5.2%
Coinbase Global, Inc.
3.375% 10/01/28 (b)		38,000		27,373
3.625% 10/01/31 (b)		50,000		33,175
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (b)		762,582		726,359
Jefferson Capital Holdings LLC
6.000% 8/15/26 (b)		380,000		336,148
Macquarie Airfinance Holdings Ltd.
8.125% 3/30/29 (b)		119,000		119,161
8.375% 5/01/28 (b)		106,000		107,458
Midcap Financial Issuer Trust
5.625% 1/15/30 (b)		339,000		262,908
OneMain Finance Corp.
4.000% 9/15/30 (c)		169,000		126,810
5.375% 11/15/29		177,000		148,238
PRA Group, Inc.
5.000% 10/01/29 (b) (c)		583,000		442,782
7.375% 9/01/25 (b)		231,000		224,938
				2,555,350
Electric — 3.5%
PG&E Corp.
5.000% 7/01/28		497,000		450,172
Pike Corp.
5.500% 9/01/28 (b)		593,000		518,804
Talen Energy Supply LLC
8.625% 6/01/30 (b)		261,000		267,552
Vistra Operations Co. LLC
3.550% 7/15/24 (b)		518,000		505,189
				1,741,717
Electronics — 0.6%
Atkore, Inc.
4.250% 6/01/31 (b)		360,000		302,654

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Engineering & Construction — 1.3%
Arcosa, Inc.
4.375% 4/15/29 (b)	$	230,000	$	200,722
Global Infrastructure Solutions, Inc.
5.625% 6/01/29 (b)		126,000		103,854
7.500% 4/15/32 (b)		140,000		119,788
MasTec, Inc.
4.500% 8/15/28 (b)		130,000		116,908
Railworks Holdings LP/Railworks Rally, Inc.
8.250% 11/15/28 (b)		117,000		110,887
				652,159
Entertainment — 1.2%
Caesars Entertainment, Inc.
6.250% 7/01/25 (b)		135,000		133,152
Live Nation Entertainment, Inc.
4.750% 10/15/27 (b)		260,000		238,063
Midwest Gaming Borrower LLC/Midwest Gaming Finance Corp.
4.875% 5/01/29 (b)		136,000		115,786
Ontario Gaming GTA LP
8.000% 8/01/30 (b)		88,000		88,000
				575,001
Environmental Controls — 0.2%
Enviri Corp.
5.750% 7/31/27 (b)		116,000		102,025
Food — 1.1%
Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertsons LLC
6.500% 2/15/28 (b)		219,000		216,455
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
3.625% 1/15/32		420,000		334,408
				550,863
Gas — 0.3%
AmeriGas Partners LP/AmeriGas Finance Corp.
9.375% 6/01/28 (b)		166,000		168,282
Hand & Machine Tools — 0.7%
Regal Rexnord Corp.
6.400% 4/15/33 (b)		340,000		327,491
Health Care – Products — 0.7%
Bausch & Lomb Escrow Corp.
8.375% 10/01/28 (b)		95,000		95,282
Garden Spinco Corp.
8.625% 7/20/30 (b)		248,000		258,876
				354,158
Health Care – Services — 6.7%
Centene Corp.
4.625% 12/15/29		557,000		501,651
Charles River Laboratories International, Inc.
3.750% 3/15/29 (b)		7,000		6,002
4.250% 5/01/28 (b)		329,000		295,040

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CHS/Community Health Systems, Inc.
4.750% 2/15/31 (b)	$	108,000	$	76,434
5.250% 5/15/30 (b)		422,000		320,794
6.000% 1/15/29 (b)		184,000		148,595
6.125% 4/01/30 (b)		213,000		108,364
HCA, Inc.
3.500% 9/01/30		776,000		656,516
LifePoint Health, Inc.
9.875% 8/15/30 (b)		274,000		265,268
Molina Healthcare, Inc.
4.375% 6/15/28 (b)		187,000		167,561
Radiology Partners, Inc.
9.250% 2/01/28 (b)		490,000		193,550
RP Escrow Issuer LLC
5.250% 12/15/25 (b) (c)		165,000		119,688
Tenet Healthcare Corp.
4.375% 1/15/30		165,000		141,920
5.125% 11/01/27		179,000		166,584
6.125% 10/01/28 (c)		152,000		142,690
				3,310,657
Home Builders — 1.4%
Ashton Woods USA LLC/Ashton Woods Finance Co.
4.625% 8/01/29 (b)		183,000		154,427
Mattamy Group Corp.
4.625% 3/01/30 (b) (c)		617,000		525,116
				679,543
Insurance — 1.2%
Alliant Holdings Intermediate LLC/Alliant Holdings Co-Issuer
6.750% 4/15/28 (b)		171,000		165,024
Highlands Holdings Bond Issuer Ltd./Highlands Holdings Bond Co.-Issuer, Inc.
7.625% 10/15/25 (b)		430,269		420,567
				585,591
Internet — 0.9%
Getty Images, Inc.
9.750% 3/01/27 (b)		367,000		366,592
Uber Technologies, Inc.
4.500% 8/15/29 (b)		78,000		69,721
				436,313
Investment Companies — 1.3%
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
4.750% 9/15/24		178,000		171,444
6.250% 5/15/26		505,000		469,166
				640,610
Leisure Time — 3.2%
Carnival Corp.
5.750% 3/01/27 (b)		205,000		185,571
6.000% 5/01/29 (b)		168,000		143,301
7.000% 8/15/29 (b)		24,000		23,665
Life Time, Inc.
5.750% 1/15/26 (b)		24,000		23,256

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
8.000% 4/15/26 (b)	$	155,000	$	152,287
NCL Corp. Ltd.
5.875% 3/15/26 (b)		118,000		108,943
5.875% 2/15/27 (b)		49,000		46,597
8.375% 2/01/28 (b)		100,000		101,437
NCL Finance Ltd.
6.125% 3/15/28 (b)		94,000		82,955
Royal Caribbean Cruises Ltd.
5.500% 8/31/26 (b)		266,000		251,077
5.500% 4/01/28 (b)		121,000		110,956
Viking Cruises Ltd.
7.000% 2/15/29 (b)		357,000		328,440
				1,558,485
Lodging — 1.1%
Hilton Grand Vacations Borrower Escrow LLC/Hilton Grand Vacations Borrower Escrow, Inc.
4.875% 7/01/31 (b)		199,000		162,229
Sugarhouse HSP Gaming Prop Mezz LP/Sugarhouse HSP Gaming Finance Corp.
5.875% 5/15/25 (b)		155,000		149,575
Travel & Leisure Co.
6.625% 7/31/26 (b)		213,000		207,249
				519,053
Media — 6.3%
Altice Financing SA
5.000% 1/15/28 (b)		152,000		129,790
CCO Holdings LLC/CCO Holdings Capital Corp.
4.250% 2/01/31 (b)		196,000		156,024
4.250% 1/15/34 (b)		486,000		357,831
4.500% 5/01/32		95,000		74,561
5.000% 2/01/28 (b)		130,000		118,058
5.375% 6/01/29 (b)		162,000		145,348
CSC Holdings LLC
4.625% 12/01/30 (b)		311,000		165,344
7.500% 4/01/28 (b) (c)		75,000		48,697
Cumulus Media New Holdings, Inc.
6.750% 7/01/26 (b)		157,000		118,927
Directv Financing LLC/Directv Financing Co.-Obligor, Inc.
5.875% 8/15/27 (b)		366,000		323,610
DISH DBS Corp.
5.125% 6/01/29		105,000		58,210
5.250% 12/01/26 (b)		53,000		45,042
5.750% 12/01/28 (b)		68,000		52,275
7.375% 7/01/28		32,000		20,163
DISH Network Corp.
11.750% 11/15/27 (b)		112,000		112,836
Gray Escrow II, Inc.
5.375% 11/15/31 (b)		246,000		160,991
iHeartCommunications, Inc.
8.375% 5/01/27 (c)		172,710		123,896
LCPR Senior Secured Financing DAC
6.750% 10/15/27 (b)		283,000		259,935
Sirius XM Radio, Inc.
3.875% 9/01/31 (b)		240,000		181,791

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Virgin Media Secured Finance PLC
4.500% 8/15/30 (b)	$	280,000	$	231,308
Virgin Media Vendor Financing Notes IV DAC
5.000% 7/15/28 (b)		277,000		239,029
				3,123,666
Mining — 2.0%
Arsenal AIC Parent LLC
8.000% 10/01/30 (b)		90,000		89,552
First Quantum Minerals Ltd.
6.875% 10/15/27 (b)		400,000		383,751
8.625% 6/01/31 (b)		200,000		199,036
Novelis Corp.
3.250% 11/15/26 (b)		48,000		42,869
3.875% 8/15/31 (b)		341,000		272,317
				987,525
Miscellaneous - Manufacturing — 0.3%
Amsted Industries, Inc.
5.625% 7/01/27 (b)		175,000		164,940
Oil & Gas — 9.1%
Apache Corp.
4.750% 4/15/43 (c)		65,000		47,344
5.100% 9/01/40		130,000		103,269
5.350% 7/01/49		197,000		150,926
Chesapeake Energy Corp.
5.875% 2/01/29 (b)		205,000		192,894
Comstock Resources, Inc.
5.875% 1/15/30 (b)		114,000		98,682
CVR Energy, Inc.
5.750% 2/15/28 (b)		350,000		316,749
Hilcorp Energy I LP/Hilcorp Finance Co.
6.250% 11/01/28 (b)		459,000		430,412
Nabors Industries Ltd.
7.250% 1/15/26 (b)		339,000		327,559
7.500% 1/15/28 (b)		169,000		156,239
Nabors Industries, Inc.
5.750% 2/01/25		55,000		53,831
7.375% 5/15/27 (b)		227,000		219,595
Neptune Energy Bondco PLC
6.625% 5/15/25 (b)		594,000		588,357
Occidental Petroleum Corp.
6.200% 3/15/40		397,000		378,422
6.450% 9/15/36		215,000		211,116
6.950% 7/01/24		42,000		42,265
Parkland Corp.
4.625% 5/01/30 (b)		105,000		89,510
5.875% 7/15/27 (b)		269,000		255,979
Permian Resources Operating LLC
7.000% 1/15/32 (b)		178,000		175,546
Southwestern Energy Co.
4.750% 2/01/32		109,000		93,553
Sunoco LP/Sunoco Finance Corp.
6.000% 4/15/27		114,000		110,493
7.000% 9/15/28 (b)		96,000		94,728

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Transocean Poseidon Ltd.
6.875% 2/01/27 (b)	$	21,750	$	21,414
Transocean, Inc.
7.250% 11/01/25 (b)		172,000		168,991
7.500% 1/15/26 (b)		140,000		136,825
				4,464,699
Oil & Gas Services — 0.5%
Weatherford International Ltd.
8.625% 4/30/30 (b)		243,000		244,860
Packaging & Containers — 2.4%
Ardagh Metal Packaging Finance USA LLC/Ardagh Metal Packaging Finance PLC
4.000% 9/01/29 (b) (c)		54,000		42,259
Clydesdale Acquisition Holdings, Inc.
8.750% 4/15/30 (b)		256,000		219,561
Graham Packaging Co., Inc.
7.125% 8/15/28 (b)		209,000		175,090
Mauser Packaging Solutions Holding Co.
7.875% 8/15/26 (b)		312,000		300,997
9.250% 4/15/27 (b)		446,000		389,842
Trident TPI Holdings, Inc.
12.750% 12/31/28 (b)		72,000		75,240
				1,202,989
Pharmaceuticals — 3.2%
1375209 BC Ltd.
9.000% 1/30/28 (b)		510,000		504,121
AdaptHealth LLC
5.125% 3/01/30 (b)		365,000		282,648
Bausch Health Cos., Inc.
4.875% 6/01/28 (b)		215,000		122,267
5.500% 11/01/25 (b) (c)		60,000		53,137
11.000% 9/30/28 (b)		102,000		69,202
14.000% 10/15/30 (b)		47,000		27,744
Herbalife Nutrition Ltd./HLF Financing, Inc.
7.875% 9/01/25 (b)		268,000		255,458
Jazz Securities DAC
4.375% 1/15/29 (b)		187,000		163,042
Organon & Co./Organon Foreign Debt Co.-Issuer BV
4.125% 4/30/28 (b)		92,000		79,940
				1,557,559
Pipelines — 8.1%
Antero Midstream Partners LP/Antero Midstream Finance Corp.
5.375% 6/15/29 (b)		141,000		129,098
CQP Holdco LP/BIP-V Chinook Holdco LLC
5.500% 6/15/31 (b)		565,000		500,787
Enbridge, Inc., Series NC5, 5 yr. CMT + 3.785%
8.250% VRN 1/15/84		211,000		206,969
Energy Transfer LP
5 yr. CMT + 5.694% 6.500% VRN (d)		100,000		91,885
5 yr. CMT + 5.306% 7.125% VRN (d)		89,000		76,733
EnLink Midstream LLC
5.375% 6/01/29		173,000		160,025

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
EnLink Midstream Partners LP
5.450% 6/01/47	$	97,000	$	75,789
5.600% 4/01/44		257,000		213,310
EQM Midstream Partners LP
4.500% 1/15/29 (b)		157,000		139,723
6.000% 7/01/25 (b)		67,000		65,960
6.500% 7/01/27 (b)		151,000		147,448
Genesis Energy LP/Genesis Energy Finance Corp.
8.000% 1/15/27		300,000		289,182
8.875% 4/15/30		105,000		102,521
Harvest Midstream I LP
7.500% 9/01/28 (b)		389,000		376,020
ITT Holdings LLC
6.500% 8/01/29 (b)		565,000		478,908
NGL Energy Operating LLC/NGL Energy Finance Corp.
7.500% 2/01/26 (b)		350,000		346,163
Tallgrass Energy Partners LP/Tallgrass Energy Finance Corp.
7.500% 10/01/25 (b)		171,000		170,532
Venture Global Calcasieu Pass LLC
3.875% 8/15/29 (b)		133,000		111,917
4.125% 8/15/31 (b)		152,000		124,734
Western Midstream Operating LP
5.450% 4/01/44		202,000		162,833
				3,970,537
Real Estate — 0.5%
Realogy Group LLC/Realogy Co.-Issuer Corp.
5.750% 1/15/29 (b)		311,000		224,838
Real Estate Investment Trusts (REITS) — 1.6%
RLJ Lodging Trust LP
3.750% 7/01/26 (b)		107,000		96,770
4.000% 9/15/29 (b) (c)		126,000		103,186
Service Properties Trust
3.950% 1/15/28		73,000		56,864
4.375% 2/15/30		115,000		82,527
4.950% 2/15/27		58,000		48,974
7.500% 9/15/25		267,000		262,310
Uniti Group LP/Uniti Group Finance, Inc./CSL Capital LLC
4.750% 4/15/28 (b)		180,000		146,985
				797,616
Retail — 3.8%
Asbury Automotive Group, Inc.
4.625% 11/15/29 (b)		148,000		127,114
Bath & Body Works, Inc.
6.750% 7/01/36		97,000		84,986
6.875% 11/01/35		222,000		198,265
Brinker International, Inc.
8.250% 7/15/30 (b)		127,000		122,238
Macy's Retail Holdings LLC
5.875% 4/01/29 (b) (c)		40,000		35,024
5.875% 3/15/30 (b)		122,000		103,424
6.125% 3/15/32 (b)		78,000		64,373
Nordstrom, Inc.
5.000% 1/15/44		313,000		184,701
PetSmart, Inc./PetSmart Finance Corp.

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
4.750% 2/15/28 (b)	$	78,000	$	68,284
7.750% 2/15/29 (b)		141,000		131,396
Sonic Automotive, Inc.
4.625% 11/15/29 (b) (c)		149,000		123,514
4.875% 11/15/31 (b) (c)		174,000		138,536
Staples, Inc.
7.500% 4/15/26 (b)		160,000		131,575
10.750% 4/15/27 (b)		89,000		52,247
Suburban Propane Partners LP/Suburban Energy Finance Corp.
5.000% 6/01/31 (b)		192,000		160,268
Superior Plus LP/Superior General Partner, Inc.
4.500% 3/15/29 (b)		145,000		126,007
				1,851,952
Software — 1.3%
AthenaHealth Group, Inc.
6.500% 2/15/30 (b)		255,000		213,309
Consensus Cloud Solutions, Inc.
6.000% 10/15/26 (b) (c)		165,000		151,874
Veritas US, Inc./Veritas Bermuda Ltd.
7.500% 9/01/25 (b)		304,000		253,997
				619,180
Telecommunications — 4.4%
Altice France Holding SA
10.500% 5/15/27 (b)		74,000		46,152
Altice France SA
5.125% 7/15/29 (b)		210,000		149,290
C&W Senior Financing DAC
6.875% 9/15/27 (b)		142,000		124,865
Connect Finco Sarl/Connect US Finco LLC
6.750% 10/01/26 (b)		256,000		238,771
Frontier Communications Holdings LLC
6.000% 1/15/30 (b)		964,000		705,057
GoTo Group, Inc.
5.500% 9/01/27 (b)		103,000		57,237
Intelsat Jackson Holdings SA
6.500% 3/15/30 (b)		158,000		140,121
Sprint Capital Corp.
8.750% 3/15/32		570,000		659,402
Viasat, Inc.
6.500% 7/15/28 (b)		69,000		47,783
				2,168,678
Transportation — 1.2%
Carriage Purchaser, Inc.
7.875% 10/15/29 (b)		191,000		144,876

MML High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Seaspan Corp.
5.500% 8/01/29 (b)	$	571,000	$	458,173
				603,049
TOTAL CORPORATE DEBT (Cost $51,343,879)				46,206,852
TOTAL BONDS & NOTES (Cost $53,165,087)				47,988,577
TOTAL LONG-TERM INVESTMENTS (Cost $53,165,087)				47,988,577
	Number of Shares
SHORT-TERM INVESTMENTS — 7.3%
Investment of Cash Collateral from Securities Loaned — 5.6%
State Street Navigator Securities Lending Government Money Market Portfolio (e)		2,784,180		2,784,180
	Principal Amount
Repurchase Agreement — 1.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (f)	$	846,091		846,091
TOTAL SHORT-TERM INVESTMENTS (Cost $3,630,271)				3,630,271
TOTAL INVESTMENTS — 104.7% (Cost $56,795,358) (g)				51,618,848
Other Assets/(Liabilities) — (4.7)%				(2,336,371)
NET ASSETS — 100.0%			$	49,282,477

Abbreviation Legend

SOFR	Secured Overnight Financing Rate
VRN	Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) All or a portion of the security represents unsettled bank loan commitments at September 30, 2023 where the rate will be determined at time of settlement.

(b) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At September 30, 2023, the aggregate market value of these securities amounted to $37,088,986 or 75.26% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $2,726,949 or 5.53% of net assets. (Note 2).

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

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

(f) Maturity value of $846,204. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 1/31/26, and an aggregate market value, including accrued interest, of $863,094.

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

MML Inflation-Protected and Income Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 82.6%
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 48.7%
Automobile Asset-Backed Securities — 6.1%
BOF URSA VI Funding Trust I, Series 2023-CAR1, Class A2
5.542% 10/27/31 (a)	$	1,169,205	$	1,152,839
Carvana Auto Receivables Trust, Series 2020-N3, Class B
0.660% 6/12/28		1,011,256		928,940
Drive Auto Receivables Trust
Series 2021-1, Class C, 1.020% 6/15/27		418,287		413,764
Series 2021-3, Class C, 1.470% 1/15/27		2,150,000		2,088,429
Exeter Automobile Receivables Trust, Series 2020-2A, Class D
4.730% 4/15/26 (a)		825,863		820,963
Hertz Vehicle Financing LLC, Series 2021-1A, Class D
3.980% 12/26/25 (a)		3,400,000		3,220,439
OneMain Direct Auto Receivables Trust, Series 2022-1A, Class C
5.310% 6/14/29 (a)		800,000		752,135
Westlake Automobile Receivables Trust, Series 2020-3A, Class D
1.650% 2/17/26 (a)		2,306,000		2,241,413
				11,618,922
Commercial Mortgage-Backed Securities — 7.5%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD Term SOFR + 1.797%
7.129% FRN 7/15/35 (a)		1,000,000		974,999
BX Commercial Mortgage Trust, Series 2019-XL, Class F, 1 mo. USD Term SOFR + 2.114%
7.447% FRN 10/15/36 (a)		1,487,500		1,471,695
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD Term SOFR + 1.864%
7.130% FRN 12/15/37 (a)		308,865		305,197
COMM Mortgage Trust, Series 2015-LC19, Class D
2.867% 2/10/48 (a)		1,700,000		1,454,205
Credit Suisse Mortgage Capital Certificates
Series 2019-ICE4, Class D, 1 mo. USD Term SOFR + 1.647% 6.980% FRN 5/15/36 (a)		3,990,073		3,953,914
Series 2019-ICE4, Class E, 1 mo. USD Term SOFR + 2.197% 7.530% FRN 5/15/36 (a)		2,493,796		2,465,740
KNDL Mortgage Trust
Series 2019-KNSQ, Class D, FRN, 144A, 1 mo. USD Term SOFR + 1.546% 6.878% FRN 5/15/36 (a)		1,000,000		988,750
Series 2019-KNSQ, Class E, 1 mo. USD Term SOFR + 1.996% 7.328% FRN 5/15/36 (a)		476,000		468,884
Ready Capital Mortgage Financing LLC, Series 2023-FL12, Class A, 1 mo. USD Term SOFR + 2.335%
7.655% FRN 5/25/38 (a)		1,999,897		1,999,890
				14,083,274

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

	Principal Amount		Value
Home Equity Asset-Backed Securities — 0.7%
Citigroup Mortgage Loan Trust, Series 2006-HE2, Class M1, 1 mo. USD Term SOFR + 0.549%
5.869% FRN 8/25/36	$	133,100	$	132,404
Home Equity Asset Trust, Series 2005-9, Class M1, 1 mo. USD Term SOFR + 0.729%
6.049% FRN 4/25/36		1,112,384		1,074,020
Residential Asset Securities Corporation Trust, Series 2005-EMX1, Class M1, 1 mo. USD Term SOFR + 0.759%
6.079% FRN 3/25/35		148,069		147,511
				1,353,935
Other Asset-Backed Securities — 18.0%
321 Henderson Receivables I LLC, Series 2006-3A, Class A1, 1 mo. USD Term SOFR + 0.314%
5.647% FRN 9/15/41 (a)		44,265		43,555
ACHV ABS Trust, Series 2023-1PL, Class A
6.420% 3/18/30 (a)		43,471		43,483
Affirm Asset Securitization Trust
Series 2021-Z1, Class A, 1.070% 8/15/25 (a)		596,432		591,030
Series 2021-Z2, Class A, 1.170% 11/16/26 (a)		372,974		361,710
Series 2022-X1, Class A, 1.750% 2/15/27 (a)		653,482		639,169
Series 2018-A, Class A, 1.900% 1/15/25 (a)		122,664		121,828
Series 2022-Z1, Class A, 4.550% 6/15/27 (a)		358,031		353,496
BHG Securitization Trust
Series 2021-B, Class A, 0.900% 10/17/34 (a)		593,562		571,988
Series 2022-C, Class A, 5.320% 10/17/35 (a)		1,814,115		1,803,936
Series 2023-A, Class A, 5.550% 4/17/36 (a)		1,359,815		1,339,615
Cascade Funding Mortgage Trust, Series 2021-EBO1, Class A,
0.985% VRN 11/25/50 (a) (b)		935,278		861,319
Elara HGV Timeshare Issuer LLC, Series 2017-A, Class C
3.310% 3/25/30 (a)		133,982		128,647
FCI Funding LLC
Series 2021-1A, Class A, 1.130% 4/15/33 (a)		640,324		621,396
Series 2021-1A, Class B, 1.530% 4/15/33 (a)		426,933		412,451
First Franklin Mortgage Loan Trust, Series 2006-FF15, Class A5, 1 mo. USD Term SOFR + 0.274%
5.594% FRN 11/25/36		268,738		258,848
FNA VI LLC, Series 21-1A, Class A
1.350% 1/10/32 (a)		2,209,348		2,014,303
Gracie Point International Funding
Series 2022-1A, Class C, 30 day USD SOFR Average + 3.500% 8.812% FRN 4/01/24 (a)		1,700,000		1,699,994
Series 2022-3A, Class B, 30 day USD SOFR Average + 4.000% 9.312% FRN 11/01/24 (a)		1,000,000		1,000,238
Series 2022-1A, Class E, 30 day USD SOFR Average + 5.750% 11.062% FRN 4/01/24 (a)		800,000		799,996
Hilton Grand Vacations Trust
Series 2017-AA, Class B, 2.960% 12/26/28 (a)		76,035		74,402
Series 2022-2A, Class C, 5.570% 1/25/37 (a)		536,273		514,345
JP Morgan Mortgage Acquisition Trust, Series 2007-CH3, Class A5, 1 mo. USD Term SOFR + 0.374%
5.694% FRN 3/25/37		149,685		145,167
KREF Ltd., Series 2021-FL2, Class D, 1 mo. USD Term SOFR + 2.314%
7.647% FRN 2/15/39 (a)		700,000		618,387
Lakeview Trust
Series 2022-1, Class M3, 4.585% 4/25/52 (a)		700,000		688,973

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

	Principal Amount		Value
Series 2022-3, Class M3, 5.437% 5/29/52 (a)	$	1,300,000	$	1,273,786
Marlette Funding Trust, Series 2023-2A, Class A
6.040% 6/15/33 (a)		918,095		915,026
MVW Owner Trust, Series 2018-1A, Class A
3.450% 1/21/36 (a)		273,079		266,643
NP SPE II LLC, Series 2019-1A, Class A1
2.574% 9/20/49 (a)		146,688		137,361
Oceanview Trust
Series 2021-1, Class A, 1.219% 12/29/51 (a)		271,026		268,589
Series 2021-1, Class M3, 3.090% 12/29/51 (a)		2,000,000		1,980,180
Oportun Funding LLC, Series 2022-1, Class A
3.250% 6/15/29 (a)		402,290		398,515
Orange Lake Timeshare Trust, Series 2016-A, Class A
2.610% 3/08/29 (a)		37,090		35,766
Pagaya AI Debt Selection Trust, Series 2021-3, Class A
1.150% 5/15/29 (a)		198,044		197,356
Pagaya AI Debt Trust, Series 2022-1, Class A
2.030% 10/15/29 (a)		3,577,372		3,507,438
PVONE 2023-1, LLC, Series 2023-1, Class A
7.670% 9/17/35 (a) (c)		1,300,000		1,299,998
Reach Financial LLC, Series 2023-1A, Class A
7.050% 2/18/31 (a)		3,645,371		3,653,830
Sierra Timeshare Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		523,902		501,218
Series 2019-2A, Class C, 3.120% 5/20/36 (a)		917,244		874,716
Series 2019-1A, Class C, 3.770% 1/20/36 (a)		120,084		116,878
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		178,422		168,395
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		223,013		216,805
Structured Asset Investment Loan Trust, Series 2005-2, Class M2, 1 mo. USD Term SOFR + 0.849%
6.169% FRN 3/25/35		136,316		135,662
Structured Asset Securities Corp. Mortgage Loan Trust
Series 2006-BC6, Class A4, 1 mo. USD Term SOFR + 0.284% 5.604% FRN 1/25/37		134,137		131,180
Series 2006-WF1, Class M4, 1 mo. USD Term SOFR + 0.759% 6.079% FRN 2/25/36		140,240		139,619
Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314% 6.634% FRN 11/25/35 (a)		347,905		339,382
Trafigura Securitisation Finance PLC, Series 2021-1A, Class B
1.780% 1/15/25 (a)		1,200,000		1,123,133
Upstart Securitization Trust, Series 2021-4, Class A
0.840% 9/20/31 (a)		572,382		567,894
				33,957,646
Student Loans Asset-Backed Securities — 6.6%
Chase Education Loan Trust, Series 2007-A, Class A4, 90 day USD SOFR Average + 0.362%
5.620% FRN 3/28/68		1,634,982		1,581,019
College Loan Corp. Trust, Series 2005-2, Class B, 90 day USD SOFR Average + 0.752%
5.783% FRN 1/15/37		224,830		196,521
Commonbond Student Loan Trust
Series 2021-AGS, Class B, 1.400% 3/25/52 (a)		124,764		91,668
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		13,372		11,507
Edsouth Indenture No. 9 LLC, No.9 LLC, Series 2015-1, Class A, 30 day USD SOFR Average + 0.914%
6.229% FRN 10/25/56 (a)		191,416		189,144

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

	Principal Amount		Value
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 0.750%
6.184% FRN 8/25/42 (a)	$	111,740	$	109,656
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + 0.700%
6.353% FRN 8/25/48 (a)		79,671		77,877
JP Morgan Student Loan Trust, Series 2007-A, Class B, 90 day USD SOFR Average + 0.612%
5.677% FRN 6/28/39 (a)		284,447		256,553
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		81,947		79,769
Navient Private Education Refi Loan Trust
Series 2021-A, Class A, 0.840% 5/15/69 (a)		1,740,819		1,502,140
Series 2020-HA, Class A, 1.310% 1/15/69 (a)		296,192		269,042
Navient Student Loan Trust, Series 2017-1A, Class A3, 30 day USD SOFR Average + 1.264%
6.579% FRN 7/26/66 (a)		307,806		307,087
Nelnet Student Loan Trust
Series 2006-2, Class B, 90 day USD SOFR Average + 0.462% 5.516% FRN 1/25/38		436,227		372,936
Series 2004-3, Class B, 90 day USD SOFR Average + 0.612% 5.666% FRN 10/25/40		870,503		811,779
Series 2005-2, Class B, 90 day USD SOFR Average + 0.432% 5.673% FRN 3/23/37		854,830		809,592
Series 2006-3, Class B, 90 day USD SOFR Average + 0.512% 5.755% FRN 6/25/41		171,779		150,784
Series 2014-2A, Class B, 30 day USD SOFR Average + 1.614% 6.929% FRN 6/25/41 (a)		375,000		353,643
SLC Student Loan Trust
Series 2006-2, Class B, 90 day USD SOFR Average + 0.492% 5.712% FRN 12/15/39		687,324		611,759
Series 2005-2, Class B, 90 day USD SOFR Average + 0.542% 5.762% FRN 3/15/40		1,036,788		953,368
SLM Student Loan Trust
Series 2006-4, Class B, 90 day USD SOFR Average + 0.462% 5.516% FRN 1/25/70		213,973		201,057
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.526% FRN 10/25/40		290,930		273,357
Series 2006-2, Class B, 90 day USD SOFR Average + 0.482% 5.536% FRN 1/25/41		304,550		282,016
Series 2005-8, Class B, 90 day USD SOFR Average + 0.572% 5.626% FRN 1/25/55		274,391		253,302
Series 2004-8, Class B, 90 day USD SOFR Average + 0.722% 5.776% FRN 1/25/40		281,990		256,899
Series 2004-3, Class B, 90 day USD SOFR Average + 0.732% 5.786% FRN 10/25/64		170,798		159,906
Series 2003-11, Class B, 90 day USD SOFR Average + 0.912% 6.132% FRN 12/15/38		243,851		234,035
SMB Private Education Loan Trust
Series 2018-B, Class A2B, 1 mo. USD Term SOFR + 0.834% 6.167% FRN 1/15/37 (a)		532,523		526,480
Series 2019-A, Class A2B, 1 mo. USD Term SOFR + 0.984% 6.317% FRN 7/15/36 (a)		716,678		709,527
Series 2014-A, Class A3, 1 mo. USD Term SOFR + 1.614% 6.947% FRN 4/15/32 (a)		259,831		260,253

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

	Principal Amount		Value
SoFi Alternative Trust, Series 2019-C, Class PT,
5.496% VRN 1/25/45 (a) (b)	$	517,432	$	492,839
				12,385,515
Whole Loan Collateral Collateralized Mortgage Obligations — 9.8%
Angel Oak Mortgage Trust
Series 2020-6, Class A1, 1.261% VRN 5/25/65 (a) (b)		881,676		755,190
Series 2022-2, Class A1, 3.353% VRN 1/25/67 (a) (b)		1,899,113		1,660,596
CIM Trust, Series 2019-INV3, Class A11, 30 day USD SOFR Average + 1.114%
5.500% FRN 8/25/49 (a)		780,991		734,472
COLT Mortgage Loan Trust, Series 2022-1, Class A1,
2.284% VRN 12/27/66 (a) (b)		6,188,491		5,185,079
NewRez Warehouse Securitization Trust, Series 2021-1, Class A, 1 mo. USD Term SOFR + 0.864%
6.184% FRN 5/25/55 (a)		4,044,733		4,026,064
OBX Trust
Series 2021-NQM2, Class A2, 1.357% VRN 5/25/61 (a) (b)		1,254,481		933,356
Series 2020-EXP1, Class 2A2, 1 mo. USD Term SOFR + 1.064% 6.384% FRN 2/25/60 (a)		335,412		313,455
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 3.850%
9.284% FRN 2/25/25 (a)		440,000		439,846
PSMC Trust, Series 2020-2, Class A2,
3.000% VRN 5/25/50 (a) (b)		675,149		575,002
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (b)		2,687,369		2,260,522
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49 (a) (b)		919,707		869,494
Verus Securitization Trust
Series 2021-3, Class A3, 1.437% VRN 6/25/66 (a) (b)		715,892		581,787
Series 2019-INV2, Class A3, 4.219% VRN 7/25/59 (a) (b)		217,739		209,186
				18,544,049
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $95,655,662)				91,943,341
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (d) — 12.1%
Pass-Through Securities — 0.0%
Federal Home Loan Mortgage Corp. Pool #1Q0239, 1 yr. CMT + 2.159% 4.376% 3/01/37		70,258		70,773
Whole Loans — 12.1%
Federal Home Loan Mortgage Corp. STACR REMICS Trust
Series 2021-DNA6, Class M1, 30 day USD SOFR Average + 0.800% 6.115% FRN 10/25/41 (a)		4,141,123		4,133,469
Series 2021-HQA3, Class M1, 30 day USD SOFR Average + 0.850% 6.165% FRN 9/25/41 (a)		5,753,551		5,660,529
Series 2021-DNA7, Class M1, 30 day USD SOFR Average + 0.850% 6.165% FRN 11/25/41 (a)		1,942,889		1,924,705
Series 2022-DNA2, Class M1A, 30 day USD SOFR Average + 1.300% 6.615% FRN 2/25/42 (a)		2,031,687		2,026,166
Series 2020-DNA1, Class M2, 30 day USD SOFR Average + 1.814% 7.129% FRN 1/25/50 (a)		741,720		742,821
Series 2022-DNA3, Class M1A, 30 day USD SOFR Average + 2.000% 7.315% FRN 4/25/42 (a)		1,678,562		1,690,760

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

	Principal Amount		Value
Series 2018-DNA3, Class M2A, 30 day USD SOFR Average + 2.214% 7.529% FRN 9/25/48 (a)	$	436,971	$	439,587
Series 2020-DNA5, Class M2, 30 day USD SOFR Average + 2.800% 8.115% FRN 10/25/50 (a)		145,808		147,825
Series 2022-DNA5, Class M1A, 30 day USD SOFR Average + 2.950% 8.265% FRN 6/25/42 (a)		519,902		533,106
Federal National Mortgage Association Connecticut Avenue Securities
Series 2022-R05, Class 2M1, 30 day USD SOFR Average + 1.900% 7.215% FRN 4/25/42 (a)		1,136,851		1,139,605
30 day USD SOFR Average + 1.900% 7.215% FRN 6/25/43 (a)		1,036,725		1,042,567
Series 2019-R03, Class 1M2, 30 day USD SOFR Average + 2.264% 7.579% FRN 9/25/31 (a)		31,873		31,896
Series 2023-R03, Class 2M1, 30 day USD SOFR Average + 2.500% 7.815% FRN 4/25/43 (a)		1,001,877		1,013,877
Series 2022-R07, Class 1M1, 30 day USD SOFR Average + 2.950% 8.265% FRN 6/25/42 (a)		2,278,614		2,340,160
				22,867,073
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $23,002,274)				22,937,846
U.S. TREASURY OBLIGATIONS — 21.8%
U.S. Treasury Bonds & Notes — 21.8%
U.S. Treasury Inflation-Indexed Bonds
0.125% 2/15/51		763,146		424,567
0.125% 2/15/52		603,933		331,396
0.250% 2/15/50		713,364		419,680
0.625% 2/15/43		930,664		676,113
0.750% 2/15/42		798,128		604,232
0.750% 2/15/45		980,043		711,948
0.875% 2/15/47		569,826		415,227
1.000% 2/15/46		645,030		489,385
1.000% 2/15/48		433,846		322,546
1.000% 2/15/49		546,633		403,195
1.375% 2/15/44		852,514		712,457
1.500% 2/15/53		976,904		807,291
1.750% 1/15/28		802,494		779,391
2.125% 2/15/40		424,269		411,060
2.125% 2/15/41		628,119		607,325
2.375% 1/15/27		1,364,073		1,353,669
2.500% 1/15/29		355,829		358,191
3.375% 4/15/32		430,523		463,909
3.625% 4/15/28		850,451		893,505
3.875% 4/15/29		929,695		1,000,820
U.S. Treasury Inflation-Indexed Notes
0.125% 10/15/26		1,677,930		1,560,278
0.125% 4/15/27		1,948,698		1,788,768
0.125% 1/15/30		1,603,895		1,398,020
0.125% 7/15/30		1,788,315		1,549,547
0.125% 1/15/31		1,825,928		1,561,275
0.125% 7/15/31		2,166,912		1,839,653
0.125% 1/15/32		1,929,725		1,616,559
0.250% 7/15/29		1,493,738		1,330,666
0.375% 1/15/27		1,961,386		1,824,338
0.375% 7/15/27		312,398		289,672
0.500% 1/15/28		1,796,855		1,656,001
0.625% 7/15/32		1,998,895		1,741,518

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

	Principal Amount		Value
0.750% 7/15/28 (e)	$	1,491,719	$	1,387,998
1.125% 1/15/33		2,873,276		2,594,591
1.375% 7/15/33		1,006,470		930,533
U.S. Treasury Notes
4.125% 7/31/28		6,000,000		5,869,873
				41,125,197
TOTAL U.S. TREASURY OBLIGATIONS (Cost $46,265,511)				41,125,197
TOTAL BONDS & NOTES (Cost $164,923,447)				156,006,384
TOTAL LONG-TERM INVESTMENTS (Cost $164,923,447)				156,006,384
SHORT-TERM INVESTMENTS — 15.7%
Commercial Paper — 14.8%
American Honda Finance Corp.
5.707% 11/21/23		4,000,000		3,967,134
CRH America Finance, Inc.
5.728% 11/20/23 (a)		3,000,000		2,975,855
Diageo Capital PLC
5.663% 11/07/23 (a)		3,000,000		2,981,933
Hyundai Capital America
5.692% 11/28/23 (a)		2,000,000		1,981,400
Nutrien Financial US LLC
5.716% 10/17/23 (a)		2,000,000		1,994,493
5.720% 10/26/23 (a)		1,000,000		995,849
5.727% 10/23/23 (a)		2,000,000		1,992,615
Nutrien Ltd.
5.722% 10/06/23 (a)		2,000,000		1,997,873
Oracle Corp.
5.595% 10/05/23 (a)		2,000,000		1,998,207
Spire, Inc.
5.612% 10/02/23 (a)		3,000,000		2,998,644
Suncor Energy, Inc.
5.751% 10/10/23 (a)		3,000,000		2,995,003
Tampa Electric Co.
5.759% 11/01/23 (a)		1,000,000		994,847
				27,873,853
Repurchase Agreement — 0.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (f)		1,740,175		1,740,175
TOTAL SHORT-TERM INVESTMENTS (Cost $29,617,838)				29,614,028
TOTAL INVESTMENTS — 98.3% (Cost $194,541,285) (g)				185,620,412
Other Assets/(Liabilities) — 1.7%				3,197,906
NET ASSETS — 100.0%			$	188,818,318

Abbreviation Legend

FRN Floating Rate Note

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) 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, 2023, the aggregate market value of these securities amounted to $125,973,259 or 66.72% of net assets.

(b) 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, 2023.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2023, these securities amounted to a value of $1,299,998 or 0.69% of net assets.

(d) 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.

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

(f) Maturity value of $1,740,407. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 2/28/26, and an aggregate market value, including accrued interest, of $1,775,021.

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

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Ultra Bond	12/19/23		4	$	517,764	$	(43,014)
Short
U.S. Treasury Long Bond	12/19/23		5		(602,054)		33,148
U.S. Treasury Ultra 10 Year	12/19/23		5		(580,219)		22,406
U.S. Treasury Note 2 Year	12/29/23		186		(37,873,673)		169,439
U.S. Treasury Note 5 Year	12/29/23		55		(5,839,276)		44,510
						$	269,503

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
12-Month USD SOFR	Annually		Fixed 4.661%		Annually		5/08/25	USD	14,400,000	$	(115,222)	$	—	$	(115,222)
12-Month USD SOFR	Annually		Fixed 3.725%		Annually		7/14/25	USD	13,900,000		(319,664)		—		(319,664)
12-Month USD SOFR	Annually		Fixed 3.512%		Annually		8/09/25	USD	28,200,000		(759,894)		—		(759,894)
12-Month USD SOFR	Annually		Fixed 4.860%		Annually		8/18/25	USD	10,000,000		(31,415)		—		(31,415)
Fixed 2.482%	Maturity		U.S. Consumer Price Index		Maturity		9/07/25	USD	8,000,000		5,613		—		5,613
12-Month USD SOFR	Annually		Fixed 5.040%		Annually		9/25/25	USD	10,000,000		10,799		—		10,799
12-Month USD SOFR	Annually		Fixed 4.525%		Annually		10/30/25	USD	28,600,000		(209,521)		—		(209,521)
Fixed 2.490%	Maturity		U.S. Consumer Price Index		Maturity		7/31/26	USD	4,000,000		7,368		—		7,368
Fixed 2.482%	Maturity		U.S. Consumer Price Index		Maturity		9/07/26	USD	2,000,000		1,265		—		1,265
Fixed 3.905%	Annually		12-Month USD SOFR		Annually		5/08/33	USD	3,300,000		95,650		—		95,650
Fixed 3.067%	Annually		12-Month USD SOFR		Annually		7/14/33	USD	3,100,000		296,510		—		296,510
Fixed 3.121%	Annually		12-Month USD SOFR		Annually		8/09/33	USD	6,300,000		579,031		—		579,031
Fixed 3.541%	Annually		12-Month USD SOFR		Annually		10/30/33	USD	6,480,000		374,633		—		374,633
										$	(64,847)	$	—	$	(64,847)

OTC Total Return Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference	Frequency	Counterparty	Termination Date	No. of Contracts/ Notional		Value		Upfront Premium Received (Paid)/ Received		Unrealized Appreciation (Depreciation)
Fed Funds + 12.5 BP	Maturity	Bloomberg US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	11/30/23		30,107,578	$	(819,222)	$	—	$	(819,222)
Fed Funds + 15.0 BP	Maturity	Bloomberg US Treasury Inflation Notes TR Index	Maturity	BNP Paribas SA	2/28/24		39,640,469		(731,138)		—		(731,138)
Fed Funds + 9.0 BP	Maturity	Bloomberg US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	10/31/23		37,983,866		(1,033,534)		—		(1,033,534)
Fed Funds + 12.0 BP	Maturity	Bloomberg US Treasury Inflation Notes TR Index	Maturity	Goldman Sachs International	2/28/24		30,028,054		(553,844)		—		(553,844)
								$	(3,137,738)	$	—	$	(3,137,738)

Currency Legend

USD U.S. Dollar

MML iShares 60/40 Allocation Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.0%
Diversified Financial Services — 100.0%
iShares 1-5 Year Investment Grade Corporate Bond ETF		33,678	$	1,678,175
iShares 20+ Year Treasury Bond ETF		7,570		671,383
iShares Broad USD High Yield Corporate Bond ETF (a)		9,653		335,056
iShares Core Dividend Growth ETF		20,243		1,002,636
iShares Core International Aggregate Bond ETF		3,449		168,242
iShares Core MSCI Emerging Markets ETF		14,108		671,400
iShares Core MSCI International Developed Markets ETF		74,636		4,349,786
iShares Core S&P 500 ETF		7,019		3,014,169
iShares Core S&P Mid-Cap ETF		2,683		669,006
iShares Core S&P Total US Stock Market ETF		110,113		10,371,543
iShares Core U.S. Aggregate Bond ETF		112,317		10,562,291
TOTAL MUTUAL FUNDS (Cost $36,127,837)				33,493,687
TOTAL LONG-TERM INVESTMENTS (Cost $36,127,837)				33,493,687
SHORT-TERM INVESTMENTS — 1.0%
Investment of Cash Collateral from Securities Loaned — 1.0%
State Street Navigator Securities Lending Government Money Market Portfolio (b)		350,385		350,385
TOTAL SHORT-TERM INVESTMENTS (Cost $350,385)				350,385
TOTAL INVESTMENTS — 101.0% (Cost $36,478,222) (c)				33,844,072
Other Assets/(Liabilities) — (1.0)%				(335,394)
NET ASSETS — 100.0%			$	33,508,678

Abbreviation Legend

ETF Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $342,588 or 1.02% of net assets. (Note 2).

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

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

MML iShares 80/20 Allocation Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 99.9%
Diversified Financial Services — 99.9%
iShares 1-5 Year Investment Grade Corporate Bond ETF (a)		56,363	$	2,808,568
iShares 20+ Year Treasury Bond ETF		6,334		561,762
iShares Broad USD High Yield Corporate Bond ETF (a)		16,154		560,705
iShares Core Dividend Growth ETF (a)		33,877		1,677,928
iShares Core International Aggregate Bond ETF		11,543		563,068
iShares Core MSCI Emerging Markets ETF		59,024		2,808,952
iShares Core MSCI International Developed Markets ETF (a)		144,118		8,399,197
iShares Core S&P 500 ETF		10,441		4,483,679
iShares Core S&P Mid-Cap ETF		8,980		2,239,163
iShares Core S&P Total US Stock Market ETF		267,493		25,195,166
iShares Core U.S. Aggregate Bond ETF		71,604		6,733,640
TOTAL MUTUAL FUNDS (Cost $58,010,361)				56,031,828
TOTAL LONG-TERM INVESTMENTS (Cost $58,010,361)				56,031,828
SHORT-TERM INVESTMENTS — 4.8%
Investment of Cash Collateral from Securities Loaned — 4.5%
State Street Navigator Securities Lending Government Money Market Portfolio (b)		2,515,515		2,515,515
	Principal Amount
Repurchase Agreement — 0.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (c)	$	162,731		162,731
TOTAL SHORT-TERM INVESTMENTS (Cost $2,678,246)				2,678,246
TOTAL INVESTMENTS — 104.7% (Cost $60,688,607) (d)				58,710,074
Other Assets/(Liabilities) — (4.7)%				(2,629,318)
NET ASSETS — 100.0%			$	56,080,756

Abbreviation Legend

ETF Exchange-Traded Fund

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $2,461,893 or 4.39% of net assets. (Note 2).

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

(c) Maturity value of $162,752. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 1/31/26, and an aggregate market value, including accrued interest, of $165,994.

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

MML Managed Bond Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.0%
CORPORATE DEBT — 37.8%
Aerospace & Defense — 0.1%
Boeing Co.
5.930% 5/01/60	$	605,000	$	543,240
Agriculture — 0.8%
BAT Capital Corp.
2.259% 3/25/28		725,000		613,153
3.462% 9/06/29		1,075,000		920,620
4.758% 9/06/49		540,000		379,767
Imperial Brands Finance PLC
3.875% 7/26/29 (a)		1,739,000		1,531,014
Reynolds American, Inc.
5.850% 8/15/45		985,000		815,905
Viterra Finance BV
3.200% 4/21/31 (a)		1,315,000		1,058,738
				5,319,197
Airlines — 0.2%
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 10/01/29		1,148,321		1,041,540
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		303,636		286,202
				1,327,742
Auto Manufacturers — 0.3%
General Motors Co.
5.150% 4/01/38		800,000		668,149
General Motors Financial Co., Inc.
3.100% 1/12/32		1,750,000		1,353,944
				2,022,093
Auto Parts & Equipment — 0.1%
Lear Corp.
3.550% 1/15/52		1,101,000		671,176
Banks — 9.4%
ABN AMRO Bank NV 1 yr. CMT + 1.650%
6.339% VRN 9/18/27 (a)		900,000		897,744
AIB Group PLC Secured Overnight Financing Rate + 2.330%
6.608% VRN 9/13/29 (a)		876,000		872,357
Bank Hapoalim BM 5 yr. CMT + 2.155%
3.255% VRN 1/21/32 (a)		2,600,000		2,216,469
Bank of America Corp.
Secured Overnight Financing Rate + 1.220% 2.299% VRN 7/21/32		1,355,000		1,026,724
5 yr. CMT + 1.200% 2.482% VRN 9/21/36		2,635,000		1,917,431
3 mo. USD Term SOFR + 1.302% 3.419% VRN 12/20/28		1,475,000		1,323,147

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5 yr. CMT + 2.000% 3.846% VRN 3/08/37	$	2,145,000	$	1,744,645
3 mo. USD Term SOFR + 2.076% 4.244% VRN 4/24/38		1,150,000		945,720
6.110% 1/29/37		1,550,000		1,528,513
7.750% 5/14/38		400,000		447,689
Bank of Montreal 5 yr. CMT + 2.979%
4.800% VRN (b)		1,475,000		1,320,283
Bank of Nova Scotia 3 mo. USD Term SOFR + 2.910%
8.209% VRN (b)		3,575,000		3,138,320
Barclays PLC
5 yr. CMT + 5.867% 6.125% VRN (b)		750,000		679,086
5 yr. CMT + 5.431% 8.000% VRN (b)		1,382,000		1,240,264
BNP Paribas SA 5 yr. USD Secured Overnight Financing Rate ICE Swap Rate + 4.149%
6.625% VRN (a) (b)		1,755,000		1,730,578
BPCE SA Secured Overnight Financing Rate + 1.730%
3.116% VRN 10/19/32 (a)		1,860,000		1,385,423
Citigroup, Inc. 3 mo. USD Term SOFR + 4.330%
9.699% VRN (b)		890,000		888,301
Credit Agricole SA Secured Overnight Financing Rate + 1.860%
6.316% VRN 10/03/29 (a) (c)		1,059,000		1,059,122
Discover Bank 5 yr. USD Secured Overnight Financing Rate ICE Swap Rate + 1.730%
5.974% VRN 8/09/28		3,105,000		2,841,171
Goldman Sachs Group, Inc.
Secured Overnight Financing Rate + 1.410% 3.102% VRN 2/24/33		1,500,000		1,199,560
6.750% 10/01/37		1,795,000		1,817,702
HSBC Holdings PLC
Secured Overnight Financing Rate + 1.285% 2.206% VRN 8/17/29		1,203,000		991,551
Secured Overnight Financing Rate + 1.970% 6.161% VRN 3/09/29		1,840,000		1,821,494
Huntington Bancshares, Inc. 5 yr. CMT + 1.170%
2.487% VRN 8/15/36		252,000		177,462
ING Groep NV 5 yr. USD ICE Swap + 4.204%
6.750% VRN (a) (b)		1,200,000		1,176,000
JP Morgan Chase & Co.
3 mo. USD Term SOFR + 2.515% 2.956% VRN 5/13/31		1,000,000		821,625
5.600% 7/15/41		1,125,000		1,070,455
Lloyds Banking Group PLC
5 yr. USD Swap + 4.760% 7.500% VRN (b)		2,100,000		2,048,814
1 yr. CMT + 3.750% 7.953% VRN 11/15/33		1,030,000		1,065,358
Macquarie Bank Ltd. 5 yr. CMT + 1.700%
3.052% VRN 3/03/36 (a)		2,665,000		1,987,363
Macquarie Group Ltd. Secured Overnight Financing Rate + 1.069%
1.340% VRN 1/12/27 (a)		950,000		849,889
Mizrahi Tefahot Bank Ltd. 5 yr. CMT + 2.250%
3.077% VRN 4/07/31 (a)		2,780,000		2,430,054
Morgan Stanley
Secured Overnight Financing Rate + 1.360% 2.484% VRN 9/16/36		1,270,000		922,511
Secured Overnight Financing Rate + 2.620% 5.297% VRN 4/20/37		2,320,000		2,067,157
National Australia Bank Ltd. 5 yr. CMT + 1.700%
3.347% VRN 1/12/37 (a)		2,960,000		2,254,037
NatWest Group PLC 5 yr. CMT + 2.100%
3.754% VRN 11/01/29		700,000		666,500
Societe Generale SA 5 yr. USD ICE Swap + 5.873%
8.000% VRN (a) (b)		1,400,000		1,367,020
SVB Financial Group
4.250% (b)		298,000		10,676
Swedbank AB 5 yr. CMT + 4.134%
5.625% VRN (a) (b)		1,200,000		1,148,832

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Synovus Bank
5.625% 2/15/28	$	1,563,000	$	1,416,190
Toronto-Dominion Bank 5 yr. CMT + 4.075%
8.125% VRN 10/31/82		1,706,000		1,697,221
UBS Group AG
Secured Overnight Financing Rate Index + 0.980% 1.305% VRN 2/02/27 (a)		2,500,000		2,217,020
1 yr. CMT + 1.800% 6.246% VRN 9/22/29 (a)		788,000		779,733
Secured Overnight Financing Rate + 3.340% 6.373% VRN 7/15/26 (a)		892,000		888,638
US Bancorp Secured Overnight Financing Rate + 2.260%
5.836% VRN 6/12/34		995,000		938,434
				61,034,283
Beverages — 0.4%
Bacardi Ltd.
5.150% 5/15/38 (a)		450,000		394,225
Bacardi Ltd./Bacardi-Martini BV
5.900% 6/15/43 (a)		396,000		365,960
Molson Coors Beverage Co.
4.200% 7/15/46		1,859,000		1,398,065
5.000% 5/01/42		360,000		310,516
				2,468,766
Biotechnology — 0.1%
Amgen, Inc.
5.600% 3/02/43		982,000		912,948
Chemicals — 0.6%
Celanese US Holdings LLC
6.165% 7/15/27		975,000		961,418
6.700% 11/15/33		643,000		625,906
International Flavors & Fragrances, Inc.
1.832% 10/15/27 (a)		1,200,000		996,689
LYB International Finance III LLC
4.200% 5/01/50		1,475,000		1,038,272
				3,622,285
Coal — 0.1%
Teck Resources Ltd.
6.000% 8/15/40		808,000		722,457
Computers — 0.1%
Dell International LLC/EMC Corp.
8.100% 7/15/36		325,000		363,575
Diversified Financial Services — 3.2%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
3.300% 1/30/32		3,315,000		2,635,133
Antares Holdings LP
2.750% 1/15/27 (a)		1,275,000		1,079,666
3.950% 7/15/26 (a)		2,555,000		2,299,760
8.500% 5/18/25 (a)		720,000		725,152
Ares Finance Co. III LLC 5 yr. CMT + 3.237%
4.125% VRN 6/30/51 (a)		1,585,000		1,204,516
Ares Finance Co. LLC
4.000% 10/08/24 (a)		2,080,000		2,011,102

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Avolon Holdings Funding Ltd.
2.528% 11/18/27 (a)	$	2,755,000	$	2,325,638
3.250% 2/15/27 (a)		1,610,000		1,434,000
4.250% 4/15/26 (a)		2,976,000		2,797,130
Blue Owl Finance LLC
3.125% 6/10/31 (a)		1,195,000		893,838
4.125% 10/07/51 (a)		1,675,000		976,740
Charles Schwab Corp. Secured Overnight Financing Rate + 2.500%
5.853% VRN 5/19/34		921,000		875,773
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (a)		1,502,197		1,430,843
				20,689,291
Electric — 1.1%
CMS Energy Corp.
4.875% 3/01/44		780,000		664,131
Entergy Texas, Inc.
5.800% 9/01/53		1,185,000		1,133,315
NextEra Energy Capital Holdings, Inc. 5 yr. CMT + 2.547%
3.800% VRN 3/15/82		1,250,000		1,058,129
Pacific Gas & Electric Co.
2.500% 2/01/31		775,000		589,605
3.750% 7/01/28		1,475,000		1,309,046
PG&E Wildfire Recovery Funding LLC
4.674% 12/01/53		1,200,000		1,004,684
Sempra
6.000% 10/15/39		166,000		157,681
Vistra Operations Co. LLC
5.125% 5/13/25 (a)		1,550,000		1,510,355
				7,426,946
Entertainment — 0.1%
Warnermedia Holdings, Inc.
4.279% 3/15/32		1,060,000		899,748
Food — 0.7%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
3.625% 1/15/32		3,300,000		2,627,494
Smithfield Foods, Inc.
2.625% 9/13/31 (a)		1,730,000		1,240,425
3.000% 10/15/30 (a)		943,000		720,838
				4,588,757
Gas — 0.5%
CenterPoint Energy Resources Corp.
6.625% 11/01/37		1,250,000		1,235,265
NiSource, Inc.
4.800% 2/15/44		1,035,000		852,363
5.800% 2/01/42		950,000		859,642
				2,947,270
Hand & Machine Tools — 0.3%
Regal Rexnord Corp.
6.050% 4/15/28 (a)		1,860,000		1,809,160

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Health Care – Services — 0.3%
City of Hope
4.378% 8/15/48	$	1,050,000	$	801,916
HCA, Inc.
5.900% 6/01/53		1,470,000		1,323,775
				2,125,691
Insurance — 5.7%
Allianz SE 5 yr. CMT + 2.973%
3.500% VRN (a) (b)		4,200,000		3,457,802
Allstate Corp. 3 mo. USD Term SOFR + 3.200%
8.564% VRN 8/15/53		2,885,000		2,846,885
Ascot Group Ltd.
4.250% 12/15/30 (a)		1,990,000		1,468,601
Athene Global Funding
2.673% 6/07/31 (a)		2,505,000		1,890,789
AXIS Specialty Finance LLC 5 yr. CMT + 3.186%
4.900% VRN 1/15/40		1,315,000		1,056,335
Brighthouse Financial, Inc.
4.700% 6/22/47		1,350,000		937,612
Corebridge Financial, Inc. 5 yr. CMT + 3.846%
6.875% VRN 12/15/52		3,281,000		3,143,165
Enstar Finance LLC
HYB, 5 yr. CMT + 4.006% 5.500% VRN 1/15/42		1,110,000		883,614
5 yr. CMT + 5.468% 5.750% VRN 9/01/40		2,200,000		1,908,897
Enstar Group Ltd.
3.100% 9/01/31		1,638,000		1,232,700
Fairfax Financial Holdings Ltd.
5.625% 8/16/32		840,000		784,569
Global Atlantic Fin Co.
3.125% 6/15/31 (a)		4,487,000		3,198,135
5 yr. CMT + 3.796% 4.700% VRN 10/15/51 (a)		3,060,000		2,213,360
Hanwha Life Insurance Co. Ltd. 5 yr. CMT + 1.850%
3.379% VRN 2/04/32 (a)		2,485,000		2,206,097
Hill City Funding Trust
4.046% 8/15/41 (a)		5,150,000		3,349,072
Liberty Mutual Group, Inc. 5 yr. CMT + 3.315%
4.125% VRN 12/15/51 (a)		1,220,000		1,003,005
MetLife Capital Trust IV
7.875% 12/15/67 (a)		725,000		749,960
Sammons Financial Group, Inc.
3.350% 4/16/31 (a)		3,805,000		2,873,645
4.450% 5/12/27 (a)		270,000		247,153
4.750% 4/08/32 (a)		805,000		648,892
USF&G Capital I
8.500% 12/15/45 (a)		885,000		930,703
				37,030,991
Investment Companies — 1.4%
Ares Capital Corp.
2.150% 7/15/26		1,850,000		1,623,113
7.000% 1/15/27		554,000		553,993
BlackRock TCP Capital Corp.
3.900% 8/23/24		1,316,000		1,278,098
Blackstone Private Credit Fund
1.750% 9/15/24		335,000		319,678

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
2.625% 12/15/26	$	3,425,000	$	2,948,048
Blue Owl Credit Income Corp.
4.700% 2/08/27		1,945,000		1,769,892
Golub Capital BDC, Inc.
2.500% 8/24/26		880,000		771,236
				9,264,058
Media — 1.0%
CCO Holdings LLC/CCO Holdings Capital Corp.
5.125% 5/01/27 (a)		2,000,000		1,863,432
Charter Communications Operating LLC/Charter Communications Operating Capital
3.900% 6/01/52		765,000		457,377
6.484% 10/23/45		1,485,000		1,296,618
Discovery Communications LLC
4.000% 9/15/55		1,210,000		725,966
4.650% 5/15/50		490,000		346,152
Paramount Global
5.850% 9/01/43		850,000		661,049
Time Warner Cable LLC
6.750% 6/15/39		985,000		901,636
				6,252,230
Oil & Gas — 1.9%
BP Capital Markets PLC 5 yr. CMT + 4.398%
4.875% VRN (b)		1,475,000		1,317,799
EQT Corp.
3.900% 10/01/27		835,000		772,353
7.000% STEP 2/01/30		1,795,000		1,846,590
Helmerich & Payne, Inc.
2.900% 9/29/31		1,625,000		1,285,190
Ovintiv, Inc.
6.500% 8/15/34		1,050,000		1,034,114
6.500% 2/01/38		545,000		520,505
7.100% 7/15/53		1,023,000		1,014,092
Patterson-UTI Energy, Inc.
3.950% 2/01/28		2,435,000		2,186,824
5.150% 11/15/29		1,225,000		1,116,683
Petroleos Mexicanos
5.350% 2/12/28		665,000		541,033
6.375% 1/23/45		595,000		347,361
6.500% 3/13/27		585,000		515,812
6.625% 6/15/35		140,000		93,772
				12,592,128
Oil & Gas Services — 0.2%
Nov, Inc.
3.950% 12/01/42		1,506,000		1,054,357
Pharmaceuticals — 1.1%
AbbVie, Inc.
4.700% 5/14/45		860,000		732,610
Cigna Group
4.800% 7/15/46		880,000		730,749
CVS Health Corp.
5.050% 3/25/48		455,000		378,035
6.125% 9/15/39		560,000		543,014

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CVS Pass-Through Trust
5.926% 1/10/34 (a)	$	879,054	$	839,360
7.507% 1/10/32 (a)		721,958		739,811
Utah Acquisition Sub, Inc.
3.950% 6/15/26		1,450,000		1,358,280
5.250% 6/15/46		2,325,000		1,716,904
				7,038,763
Pipelines — 1.8%
Energy Transfer LP
6.125% 12/15/45		1,000,000		889,502
3 mo. USD LIBOR + 4.028% 9.654% VRN (b)		2,370,000		2,215,427
EnLink Midstream Partners LP
4.850% 7/15/26		951,000		895,327
5.450% 6/01/47		1,125,000		878,995
Enterprise Products Operating LLC 3 mo. USD Term SOFR + 3.295%
5.250% VRN 8/16/77		2,475,000		2,177,959
Plains All American Pipeline LP 3 mo. USD Term SOFR + 4.372%
9.736% VRN (b)		2,345,000		2,212,872
Plains All American Pipeline LP/PAA Finance Corp.
4.700% 6/15/44		1,195,000		882,518
6.650% 1/15/37		375,000		367,239
Targa Resources Partners LP/Targa Resources Partners Finance Corp.
4.875% 2/01/31		930,000		832,954
Western Midstream Operating LP
6.350% 1/15/29		258,000		258,532
				11,611,325
Private Equity — 0.4%
Apollo Management Holdings LP 5 yr. CMT + 3.266%
4.950% VRN 1/14/50 (a)		1,505,000		1,356,180
KKR Group Finance Co. VIII LLC
3.500% 8/25/50 (a)		710,000		442,898
KKR Group Finance Co. X LLC
3.250% 12/15/51 (a)		1,035,000		606,037
				2,405,115
Real Estate Investment Trusts (REITS) — 3.0%
Broadstone Net Lease LLC
2.600% 9/15/31		1,899,000		1,328,704
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		2,625,000		2,032,393
GLP Capital LP/GLP Financing II, Inc.
5.750% 6/01/28		1,050,000		1,006,741
Kimco Realty OP LLC
4.125% 12/01/46		710,000		491,454
4.450% 9/01/47		800,000		591,175
Omega Healthcare Investors, Inc.
3.375% 2/01/31		1,625,000		1,270,413
Piedmont Operating Partnership LP
2.750% 4/01/32		1,035,000		674,421
Rexford Industrial Realty LP
2.125% 12/01/30		1,137,000		861,637
Service Properties Trust
4.950% 10/01/29		1,155,000		873,304

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Spirit Realty LP
2.700% 2/15/32	$	550,000	$	417,268
3.200% 1/15/27		2,280,000		2,065,504
3.400% 1/15/30		515,000		431,147
4.000% 7/15/29		1,290,000		1,141,169
STORE Capital Corp.
4.500% 3/15/28		2,075,000		1,825,305
4.625% 3/15/29		1,700,000		1,454,101
VICI Properties LP/VICI Note Co., Inc.
3.750% 2/15/27 (a)		900,000		816,672
WEA Finance LLC
2.875% 1/15/27 (a)		2,420,000		2,078,769
				19,360,177
Retail — 0.1%
Advance Auto Parts, Inc.
5.950% 3/09/28		999,000		944,178
Software — 0.4%
Electronic Arts, Inc.
2.950% 2/15/51		1,100,000		664,731
Microsoft Corp.
2.921% 3/17/52		2,064,000		1,353,795
Oracle Corp.
6.900% 11/09/52		712,000		733,452
				2,751,978
Telecommunications — 1.5%
AT&T, Inc.
3.550% 9/15/55		5,153,000		3,154,450
British Telecommunications PLC
9.625% STEP 12/15/30		2,155,000		2,538,236
Sprint Capital Corp.
8.750% 3/15/32		2,250,000		2,602,904
T-Mobile USA, Inc.
6.000% 6/15/54		974,000		928,439
Vodafone Group PLC
4.250% 9/17/50		1,150,000		833,760
				10,057,789
Toys, Games & Hobbies — 0.2%
Mattel, Inc.
5.875% 12/15/27 (a)		1,145,000		1,113,029
Venture Capital — 0.7%
Hercules Capital, Inc.
2.625% 9/16/26		3,284,000		2,852,253
3.375% 1/20/27		1,745,000		1,525,734
				4,377,987
TOTAL CORPORATE DEBT (Cost $285,065,710)				245,348,730
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 29.2%
Commercial Mortgage-Backed Securities — 9.0%
Bank, Series 2020-BN30, Class MCDF,
3.016% VRN 12/15/53 (d)		2,100,000		1,094,124

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
BBCMS Mortgage Trust
Series 2018-CHRS, Class B, 4.409% VRN 8/05/38 (a) (d)	$	2,250,000	$	1,798,956
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38 (a) (d)		1,610,000		1,210,488
Series 2018-CHRS, Class D, 4.409% VRN 8/05/38 (a) (d)		1,370,000		922,015
Benchmark Mortgage Trust
Series 2021-B23, Class 360A, 2.852% VRN 2/15/54 (a) (d)		2,200,000		1,487,439
Series 2021-B23, Class 360B, 2.852% VRN 2/15/54 (a) (d)		3,587,000		2,187,453
Series 2021-B25, Class 300C, 3.094% VRN 4/15/54 (a) (d)		2,500,000		1,608,618
BGME Trust
Series 2021-VR, Class C, 3.094% VRN 1/10/43 (a) (d)		12,518,000		9,448,675
Series 2021-VR, Class D, 3.094% VRN 1/10/43 (a) (d)		2,800,000		2,008,726
BX Commercial Mortgage Trust
Series 2019-XL, Class E, 1 mo. USD Term SOFR + 1.914% 7.247% FRN 10/15/36 (a)		1,469,650		1,455,413
Series 2021-SOAR, Class E, 1 mo. USD Term SOFR + 1.914% 7.248% FRN 6/15/38 (a)		1,763,969		1,713,247
Series 2021-VOLT, Class E, 1 mo. USD Term SOFR + 2.114% 7.447% FRN 9/15/36 (a)		4,999,000		4,767,770
BX Trust, Series 2023-LIFE, Class C
5.884% 2/15/28 (a)		1,100,000		1,021,883
COLEM Mortgage Trust, Series 2022-HLNE, Class D,
2.543% VRN 4/12/42 (a) (d)		1,600,000		1,217,796
COMM Mortgage Trust
Series 2012-CR4, Class B, 3.703% 10/15/45 (a)		1,060,000		647,993
Series 2014-UBS2, Class AM, 4.199% 3/10/47		1,375,000		1,348,223
Series 2015-CR23, Class C, 4.443% VRN 5/10/48 (d)		1,000,000		862,528
Series 2014-LC17, Class C, 4.694% VRN 10/10/47 (d)		2,908,000		2,616,085
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class E, 1 mo. USD Term SOFR + 2.197%
7.530% FRN 5/15/36 (a)		568,585		562,189
DROP Mortgage Trust
Series 2021-FILE, Class C, 1 mo. USD Term SOFR + 2.364% 7.697% FRN 10/15/43 (a)		2,629,000		2,129,259
Series 2021-FILE, Class D, 1 mo. USD Term SOFR + 2.864% 8.197% FRN 10/15/43 (a)		908,000		682,107
Extended Stay America Trust, Series 2021-ESH, Class D, 1 mo. USD Term SOFR + 2.364%
7.697% FRN 7/15/38 (a)		1,900,975		1,870,079
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2022-OPO, Class C,
3.565% VRN 1/05/39 (a) (d)		2,500,000		1,773,119
KIND Trust, Series 2021-KIND, Class C, 1 mo. USD Term SOFR + 1.864%
7.197% FRN 8/15/38 (a)		2,581,344		2,385,675
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD Term SOFR + 1.996%
7.328% FRN 5/15/36 (a)		1,505,000		1,482,501
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD Term SOFR + 1.864%
7.197% FRN 3/15/38 (a)		1,902,047		1,830,713
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/10/42 (a)		919,000		623,905
Series 2020-ABC, Class B, 3.593% VRN 2/10/42 (a) (d)		2,253,000		1,391,822
MHC Commercial Mortgage Trust, Series 2021-MHC, Class D, 1 mo. USD Term SOFR + 1.715%
7.047% FRN 4/15/38 (a)		1,475,986		1,448,307
Ready Capital Mortgage Financing LLC, 1 mo. USD Term SOFR + 3.198%
8.518% FRN 5/25/38 (a)		1,900,000		1,897,884

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD Term SOFR + 2.214%
7.548% FRN 7/15/39 (a)	$	3,761,000	$	2,407,857
Wells Fargo Commercial Mortgage Trust, Series 2018-C45, Class B
4.556% 6/16/51		400,000		345,118
				58,247,967
Other Asset-Backed Securities — 14.5%
522 Funding CLO Ltd., Series 2018-3A, Class CR, 3 mo. USD Term SOFR + 2.312%
7.638% FRN 10/20/31 (a)		950,000		935,740
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40 (a)		719,684		626,125
Series 2021-2A, Class B, 3.538% 1/15/47 (a)		888,326		710,723
Anchorage Capital CLO 19 Ltd., Series 2021-19A, Class A, 3 mo. USD Term SOFR + 1.472%
6.780% FRN 10/15/34 (a)		2,000,000		1,983,826
Apidos CLO XLIV Ltd., Series 2023-44A, Class B, 3 mo. USD Term SOFR + 2.550%
7.607% FRN 4/26/35 (a)		1,750,000		1,757,920
Atrium XV, Series 15A, Class B, 3 mo. USD Term SOFR + 2.012%
7.357% FRN 1/23/31 (a)		1,190,000		1,188,278
Bain Capital Credit CLO Ltd., Series 2022-1A, Class A1, 3 mo. USD Term SOFR + 1.320%
6.630% FRN 4/18/35 (a)		750,000		739,483
Ballyrock CLO Ltd., Series 2019-2A, Class CR, 3 mo. USD Term SOFR + 3.412%
8.791% FRN 11/20/30 (a)		400,000		395,000
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (a)		166,786		161,321
Business Jet Securities LLC
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		181,042		169,732
Series 2021-1A, Class C, 5.067% 4/15/36 (a)		511,986		476,559
Canyon Capital CLO Ltd., Series 2019-2A, Class CR, 3 mo. USD Term SOFR + 2.412%
7.720% FRN 10/15/34 (a)		700,000		678,504
Carlyle US CLO Ltd., Series 2021-6A, Class B, 3 mo. USD Term SOFR + 1.962%
7.270% FRN 7/15/34 (a)		1,400,000		1,379,631
CARS-DB4 LP
Series 2020-1A, Class A3, 3.250% 2/15/50 (a)		453,689		401,162
Series 2020-1A, Class A6, 3.810% 2/15/50 (a)		393,440		321,594
Castlelake Aircraft Structured Trust, Series 2019-1A, Class A
3.967% 4/15/39 (a)		376,536		334,859
CBAM Ltd., Series 2018-6A, Class B1R, 3 mo. USD Term SOFR + 2.362%
7.670% FRN 1/15/31 (a)		900,000		898,779
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD Term SOFR + 1.242%
6.568% FRN 4/20/31 (a)		750,000		748,139
Diameter Capital CLO 2 Ltd., Series 2021-2A, Class A1, 3 mo. USD Term SOFR + 1.482%
6.790% FRN 10/15/36 (a)		2,000,000		1,987,718
Eaton Vance CLO Ltd.
Series 2020-2A, Class BR, 3 mo. USD Term SOFR + 1.962% 7.270% FRN 1/15/35 (a)		1,400,000		1,371,888
Series 2018-1A, Class B, 3 mo. USD Term SOFR + 2.012% 7.320% FRN 10/15/30 (a)		1,700,000		1,675,086
Series 2020-1A, Class CR, 3 mo. USD Term SOFR + 2.312% 7.620% FRN 10/15/34 (a)		350,000		339,965

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Elmwood CLO III Ltd., Series 2019-3A, Class BR, 3 mo. USD Term SOFR + 1.912%
7.238% FRN 10/20/34 (a)	$	350,000	$	345,790
Flexential Issuer
Series 2021-1A, Class B, 3.720% 11/27/51 (a)		4,000,000		3,418,512
Series 2021-1A, Class C, 6.930% 11/27/51 (a)		4,000,000		3,427,546
GoldenTree Loan Management US CLO 1 Ltd., Series 2021-11A, Class A, 3 mo. USD Term SOFR + 1.392%
6.718% FRN 10/20/34 (a)		1,000,000		995,388
GoldenTree Loan Management US CLO 5 Ltd., Series 2019-5A, Class CR, 3 mo. USD Term SOFR + 2.312%
7.638% FRN 10/20/32 (a)		1,000,000		988,449
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		1,589,422		1,339,563
Series 2017-1A, Class A, 3.740% 10/15/52 (a)		420,592		376,465
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		710,944		636,976
Gulf Stream Meridian 6 Ltd., Series 2021-6A, Class A2, 3 mo. USD Term SOFR + 2.012%
7.320% FRN 1/15/37 (a)		500,000		493,206
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD Term SOFR + 1.962%
7.288% FRN 1/20/31 (a)		1,290,000		1,274,072
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (a)		345,046		296,909
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		388,508		325,148
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		113,300		95,428
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		444,521		386,850
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		91,085		78,909
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		682,319		618,274
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A
4.458% 12/15/38 (a)		801,840		686,606
Horizon Aircraft Finance II Ltd., Series 2019-1, Class A
3.721% 7/15/39 (a)		1,036,456		891,375
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A
3.425% 11/15/39 (a)		2,618,059		2,058,570
HPS Loan Management Ltd., Series 2023-18A, Class B, 3 mo. USD Term SOFR + 2.950%
8.212% FRN 7/20/36 (a)		1,000,000		1,003,815
Invesco CLO Ltd., Series 2021-3A, Class B, 3 mo. USD Term SOFR + 1.912%
7.257% FRN 10/22/34 (a)		2,000,000		1,962,626
KKR CLO 28 LTD, Series 28A, Class A, 3 mo. USD Term SOFR + 1.402%
6.811% FRN 3/15/31 (a)		857,938		855,845
KKR CLO 36 Ltd., Series 36A, Class C, 3 mo. USD Term SOFR + 2.412%
7.720% FRN 10/15/34 (a)		500,000		484,032
KREF Ltd.
Series 2021-FL2, Class B, 1 mo. USD Term SOFR + 1.764% 7.097% FRN 2/15/39 (a)		2,900,000		2,736,341
Series 2021-FL2, Class C, 1 mo. USD Term SOFR + 2.114% 7.447% FRN 2/15/39 (a)		5,000,000		4,575,208
Series 2021-FL2, Class D, 1 mo. USD Term SOFR + 2.314% 7.647% FRN 2/15/39 (a)		4,100,000		3,621,982
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (a)		1,659,900		1,398,555
Madison Park Funding XXIX Ltd., Series 2018-29A, Class C, 3 mo. USD Term SOFR + 2.462%
7.772% FRN 10/18/30 (a)		620,000		614,480

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Madison Park Funding XXVIII Ltd., Series 2018-28A, Class B, 3 mo. USD Term SOFR + 1.862%
7.170% FRN 7/15/30 (a)	$	1,665,000	$	1,657,386
Madison Park Funding XXXII Ltd, Series 2018-32A, Class CR, 3 mo. USD Term SOFR + 2.262%
7.607% FRN 1/22/31 (a)		1,000,000		976,788
Mariner Finance Issuance Trust
Series 2021-AA, Class B, 2.330% 3/20/36 (a)		1,336,000		1,162,154
Series 2021-AA, Class C, 2.960% 3/20/36 (a)		637,000		527,776
Mosaic Solar Loan Trust, Series 2018-1A, Class A
4.010% 6/22/43 (a)		153,301		136,112
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (a)		141,291		132,267
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class BRR, 3 mo. USD Term SOFR + 1.912%
7.220% FRN 7/15/34 (a)		1,800,000		1,777,165
Neuberger Berman Loan Advisers CLO 45 Ltd., Series 2015-45A, Class B, 3 mo. USD Term SOFR + 1.912%
7.223% FRN 10/14/35 (a)		1,350,000		1,329,175
NP SPE II LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (a)		2,260,000		2,040,061
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A5
3.390% 11/20/50 (a)		1,200,000		1,055,637
OCP CLO Ltd., Series 2018-15A, Class A1, 3 mo. USD Term SOFR + 1.362%
6.688% FRN 7/20/31 (a)		250,000		249,396
Oxford Finance Funding LLC, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		406,246		395,517
Parallel Ltd., Series 2021-2A, Class A2, 3 mo. USD Term SOFR + 2.112%
7.438% FRN 10/20/34 (a)		450,000		444,823
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (a)		1,182,171		1,028,122
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (a)		2,234,925		1,897,505
Rad CLO 12 Ltd., Series 2021-12A, Class A, 3 mo. USD Term SOFR + 1.432%
6.801% FRN 10/30/34 (a)		1,000,000		991,856
Rockford Tower CLO Ltd., Series 2019-1A, Class B1R, 3 mo. USD Term SOFR + 1.812%
7.138% FRN 4/20/34 (a)		1,500,000		1,454,445
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD Term SOFR + 1.352%
6.660% FRN 1/15/30 (a)		2,204,468		2,200,896
RR 7 Ltd., Series 2019-7A, Class A2B, 3 mo. USD Term SOFR + 1.850%
7.158% FRN 1/15/37 (a)		750,000		734,575
RR 19 Ltd., Series 2021-19A, Class A1, 3 mo. USD Term SOFR + 1.402%
6.710% FRN 10/15/35 (a)		1,000,000		993,289
Sierra Timeshare Receivables Funding LLC
Series 2021-1A, Class D, 3.170% 11/20/37 (a)		431,541		393,465
Series 2018-3A, Class D, 5.200% 9/20/35 (a)		183,271		180,632
Silver Point CLO 2 Ltd., Series 2023-2A, Class A1, 3 mo. USD Term SOFR + 2.250%
7.332% FRN 4/20/35 (a)		1,500,000		1,513,209
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD Term SOFR + 2.562%
7.941% FRN 8/18/31 (a)		1,170,000		1,159,736
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314%
6.634% FRN 11/25/35 (a)		983,731		959,633

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (a)	$	50,623	$	48,872
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (a)		389,298		353,777
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (a)		1,661,822		1,381,139
Symphony CLO Ltd., Series 2023-30A, Class B, 3 mo. USD Term SOFR + 2.650%
7.718% FRN 4/20/35 (a)		1,875,000		1,881,412
THL Credit Wind River CLO Ltd., Series 2018-2A, Class B, 3 mo. USD Term SOFR + 2.012%
7.320% FRN 7/15/30 (a)		1,150,000		1,134,170
Thrust Engine Leasing DAC
Series 2021-1A, Class A, 4.163% 7/15/40 (a)		2,424,471		2,080,100
Series 2021-1A, Class B, 6.121% 7/15/40 (a)		1,158,289		884,389
Series 2021-1A, Class C, 7.386% 7/15/40 (a)		728,392		541,283
TICP CLO XIV Ltd., Series 2019-14A, Class A2R, 3 mo. USD Term SOFR + 1.912%
7.238% FRN 10/20/32 (a)		1,000,000		990,947
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370% 4/30/48 (a)		1,799,818		1,629,802
Voya CLO Ltd., Series 2021-3A, Class B, 3 mo. USD Term SOFR + 1.862%
7.188% FRN 1/20/35 (a)		500,000		490,065
WAVE Trust
Series 2017-1A, Class A, 3.844% 11/15/42 (a)		269,260		216,450
Series 2017-1A, Class C, 6.656% 11/15/42 (a)		2,249,551		252,130
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		923,113		777,759
Wind River CLO Ltd., Series 2016-2A, Class BR, 3 mo. USD Term SOFR + 2.062%
7.434% FRN 11/01/31 (a)		900,000		886,507
				94,209,374
Student Loans Asset-Backed Securities — 3.0%
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48 (a)		1,212,110		1,090,686
Series 2019-A, Class C, 4.460% 12/28/48 (a)		808,279		727,878
Edsouth Indenture No. 8 LLC, Series 2014-4, Class B, 30 day USD SOFR Average + 1.614%
6.929% FRN 6/25/48 (a)		1,200,000		1,189,983
Edsouth Indenture No. 9 LLC, Series 2015-1, Class B, 30 day USD SOFR Average + 1.614%
6.929% FRN 10/25/56 (a)		1,100,000		1,068,034
Educational Funding of the South, Inc., Series 2011-1, Class B, 90 day USD SOFR Average + 3.962%
9.016% FRN 4/25/46		625,000		632,119
EDvestinU Private Education Loan Issue No. 1 LLC, Series 2019-A, Class A
3.580% 11/25/38 (a)		522,048		485,382
Higher Education Funding I
Series 2004-1, Class B2, 0.000%FRN 1/01/44 (a) (d)		450,000		387,199
Series 2004-1, Class B1, 4.161% FRN 1/01/44 (a) (d)		450,000		387,174
Laurel Road Prime Student Loan Trust, Series 2017-B, Class BFX
3.020% 8/25/42 (a)		547,785		498,641
Navient Student Loan Trust
Series 2021-2A, Class B, 30 day USD SOFR Average + 1.464% 6.779% FRN 2/25/70 (a)		2,330,000		2,181,143
Series 2015-3, Class B, 30 day USD SOFR Average + 1.614% 6.929% FRN 10/25/58		940,000		884,251

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Nelnet Student Loan Trust
Series 2005-4, Class A4R1, 1.658% FRN 3/22/32 (d)	$	110,000	$	109,040
Series 2019-5, Class B, 3.450% 10/25/67 (a)		2,150,000		1,585,084
Series 2019-1A, Class B, 30 day USD SOFR Average + 1.514% 6.829% FRN 4/25/67 (a)		3,250,000		3,091,287
SLM Student Loan Trust
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.526% FRN 10/25/40		1,501,928		1,411,203
Series 2005-6, Class B, 90 day USD SOFR Average + 0.552% 5.606% FRN 1/25/44		1,157,452		1,076,522
SoFi Alternative Trust, Series 2019-C, Class PT,
5.496% VRN 1/25/45 (a) (d)		1,621,287		1,544,229
SoFi Professional Loan Program LLC, Series 2017-C, Class C,
4.210% VRN 7/25/40 (a) (d)		990,000		857,713
				19,207,568
Whole Loan Collateral Collateralized Mortgage Obligations — 2.6%
Banc of America Mortgage Trust, Series 2004-G, Class 2A7,
5.348% VRN 8/25/34 (d)		5,630		5,356
Credit Suisse Mortgage Trust, Series 2021-NQM3, Class M1,
2.317% VRN 4/25/66 (a) (d)		1,330,000		736,089
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (d)		3,622,278		2,656,573
GS Mortgage-Backed Securities Trust, Series 2021-GR2, Class A2,
2.500% VRN 2/25/52 (a) (d)		2,004,743		1,529,165
New Residential Mortgage Loan Trust, Series 2021-INV1, Class A4,
2.500% VRN 6/25/51 (a) (d)		2,363,265		1,733,215
NewRez Warehouse Securitization Trust, Series 2021-1, Class D, 1 mo. USD Term SOFR + 1.514%
6.834% FRN 5/25/55 (a)		2,258,533		2,244,225
NMLT Trust, Series 2021-INV1, Class M1,
2.711% VRN 5/25/56 (a) (d)		5,400,000		3,374,614
Starwood Mortgage Residential Trust, Series 2021-3, Class M1,
2.491% VRN 6/25/56 (a) (d)		2,448,000		1,537,207
Verus Securitization Trust
Series 2021-3, Class M1, 2.397% VRN 6/25/66 (a) (d)		3,640,000		2,225,623
Series 2021-R3, Class M1, 2.411% VRN 4/25/64 (a) (d)		1,147,000		863,483
Wells Fargo Mortgage-Backed Securities Trust, Series 2019-1, Class A1,
3.935% VRN 11/25/48 (a) (d)		41,730		38,072
				16,943,622
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.1%
GS Mortgage-Backed Securities Trust, Series 2021-GR2, Class A4,
2.500% VRN 2/25/52 (a) (d)		1,331,483		978,172
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $221,735,202)				189,586,703
SOVEREIGN DEBT OBLIGATION — 0.2%
Mexico Government International Bond
4.750% 3/08/44		1,652,000		1,265,185
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,645,713)				1,265,185

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (e) — 29.3%
Collateralized Mortgage Obligations — 0.0%
Federal Home Loan Mortgage Corp. REMICS Series 2178, Class PB 7.000% 8/15/29	$	12,867	$	12,998
Pass-Through Securities — 29.3%
Federal Home Loan Mortgage Corp.
Pool #RA4245 2.000% 12/01/50		2,066,070		1,588,333
Pool #RA4255 2.000% 1/01/51		4,265,973		3,287,550
Pool #RA5576 2.500% 7/01/51		7,580,091		6,082,970
Pool #SD0905 3.000% 3/01/52		3,332,056		2,768,401
Pool #J13972 3.500% 1/01/26		4,891		4,781
Pool #C91344 3.500% 11/01/30		34,967		32,860
Pool #C91424 3.500% 1/01/32		21,585		20,284
Pool #RA2483 3.500% 6/01/50		3,617,114		3,146,111
Pool #SD1523 4.000% 8/01/52		5,097,499		4,573,001
Pool #SD1603 4.000% 9/01/52		3,164,273		2,822,869
Pool #C91239 4.500% 3/01/29		1,627		1,592
Pool #C91251 4.500% 6/01/29		11,372		11,127
Pool #C90939 5.500% 12/01/25		3,843		3,816
Pool #D97258 5.500% 4/01/27		1,424		1,414
Pool #C91026 5.500% 4/01/27		8,668		8,607
Pool #C91074 5.500% 8/01/27		912		905
Pool #D97417 5.500% 10/01/27		5,856		5,821
Pool #C91128 5.500% 12/01/27		613		609
Pool #C91148 5.500% 1/01/28		20,170		20,044
Pool #C91176 5.500% 5/01/28		7,795		7,753
Pool #C91217 5.500% 11/01/28		3,127		3,082
Federal National Mortgage Association
Pool #CB0414 2.500% 5/01/51		6,224,862		4,962,338
Pool #FM8596 2.500% 9/01/51		1,981,753		1,590,343
Pool #FM9104 2.500% 10/01/51		5,794,398		4,645,437
Pool #FM9227 2.500% 10/01/51		4,296,926		3,438,182
Pool #MA4548 2.500% 2/01/52		6,499,669		5,166,176
Pool #FS3035 2.500% 4/01/52		8,883,280		7,121,831
Pool #MA3029 3.000% 6/01/32		1,015,488		937,762
Pool #MA3090 3.000% 8/01/32		415,012		383,247
Pool #AO8180 3.000% 9/01/42		9,367		8,179
Pool #AB7397 3.000% 12/01/42		60,490		52,795
Pool #AB7401 3.000% 12/01/42		49,059		42,859
Pool #AP8668 3.000% 12/01/42		72,449		63,166
Pool #AR1975 3.000% 12/01/42		13,932		12,169
Pool #AR0306 3.000% 1/01/43		3,825		3,341
Pool #AR5391 3.000% 1/01/43		15,579		13,572
Pool #AL3215 3.000% 2/01/43		48,606		42,383
Pool #AR4109 3.000% 2/01/43		53,097		46,282
Pool #AR4432 3.000% 3/01/43		22,880		19,943
Pool #AT0169 3.000% 3/01/43		109,416		95,319
Pool #AB8809 3.000% 3/01/43		24,832		21,672
Pool #MA1368 3.000% 3/01/43		94,505		82,410
Pool #AR2174 3.000% 4/01/43		91,252		79,479
Pool #FS1075 3.000% 3/01/52		3,357,859		2,802,379
Pool #CB3304 3.000% 4/01/52		5,167,547		4,312,696
Pool #CB3305 3.000% 4/01/52		6,180,173		5,148,149
Pool #AS1304 3.500% 12/01/28		364,247		350,535
Pool #MA1356 3.500% 2/01/43		3,441,573		3,070,614
Pool #CA6096 3.500% 6/01/50		4,000,251		3,461,856

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #FM4017 3.500% 8/01/50	$	286,458	$	249,157
Pool #CB3842 3.500% 6/01/52		10,046,528		8,695,934
Pool #AA3980 4.500% 4/01/28		13,500		13,274
Pool #CA1909 4.500% 6/01/48		1,831,961		1,710,963
Pool #CB3866 4.500% 6/01/52		5,885,403		5,439,208
Pool #CB4129 4.500% 7/01/52		5,042,824		4,636,870
Pool #AD6437 5.000% 6/01/40		172,342		169,774
Pool #AD6996 5.000% 7/01/40		1,107,237		1,090,524
Pool #AL8173 5.000% 2/01/44		387,822		381,070
Pool #775539 RFUCC1 yr. Treasury + 1.641% 5.391% FRN 5/01/34		10,991		11,073
Pool #AD0836 5.500% 11/01/28		17,514		17,377
Government National Mortgage Association
Pool #352022 7.000% 11/15/23		10		10
Pool #491089 7.000% 12/15/28		2,146		2,145
Pool #480539 7.000% 4/15/29		56		57
Pool #488634 7.000% 5/15/29		1,278		1,292
Pool #500928 7.000% 5/15/29		2,198		2,229
Pool #510083 7.000% 7/15/29		126		128
Pool #493723 7.000% 8/15/29		1,647		1,673
Pool #581417 7.000% 7/15/32		2,985		3,019
Government National Mortgage Association II
Pool #008746 1 yr. CMT + 1.500% 2.750% FRN 11/20/25		672		654
Pool #080136 1 yr. CMT + 1.500% 2.750% FRN 11/20/27		258		249
Pool #MA6038 3.000% 7/20/49		1,978,722		1,690,715
Pool #MA6283 3.000% 11/20/49		3,586,015		3,060,422
Pool #MA6409 3.000% 1/20/50		3,698,264		3,155,063
Pool #MA4321 3.500% 3/20/47		2,210,270		1,962,807
Government National Mortgage Association II, TBA
2.500% 10/20/53 (c)		13,050,000		10,663,702
3.000% 10/20/53 (c)		9,125,000		7,732,943
3.500% 10/20/53 (c)		5,770,000		5,054,830
4.500% 10/20/53 (c)		2,000,000		1,847,328
Uniform Mortgage-Backed Security, TBA
2.000% 10/01/53 (c)		6,925,000		5,264,042
2.500% 10/01/52 (c)		6,350,000		5,036,588
3.000% 10/01/53 (c)		7,525,000		6,221,355
3.500% 10/01/53 (c)		2,000,000		1,719,687
4.000% 10/01/53 (c)		18,350,000		16,342,961
4.500% 10/01/38 (c)		7,500,000		7,186,233
4.500% 10/01/52 (c)		1,975,000		1,813,682
5.000% 10/01/38 (c)		7,400,000		7,204,017
5.000% 10/01/53 (c)		10,300,000		9,719,424
				190,469,523
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $208,849,600)				190,482,521
U.S. TREASURY OBLIGATIONS — 2.5%
U.S. Treasury Bonds & Notes — 2.5%
U.S. Treasury Bonds
2.250% 8/15/49 (f)		18,200,000		11,310,121

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Treasury Notes
4.500% 7/15/26	$	4,600,000	$	4,556,972
				15,867,093
TOTAL U.S. TREASURY OBLIGATIONS (Cost $17,683,341)				15,867,093
TOTAL BONDS & NOTES (Cost $734,979,566)				642,550,232
TOTAL LONG-TERM INVESTMENTS (Cost $734,979,566)				642,550,232
SHORT-TERM INVESTMENTS — 14.2%
Commercial Paper — 12.9%
Alimentation Couche-Tard, Inc.
5.784% 10/02/23 (a)		3,000,000		2,998,624
American Electric Power Co., Inc.
5.691% 10/30/23 (a)		6,000,000		5,971,320
5.696% 11/02/23 (a)		5,000,000		4,973,773
American Honda Finance Corp.
5.707% 11/21/23		7,000,000		6,942,485
Aon Corp.
5.718% 11/28/23 (a)		6,000,000		5,944,800
5.724% 11/03/23 (a)		3,000,000		2,983,973
CRH America Finance, Inc.
5.728% 11/20/23 (a)		2,000,000		1,983,903
Intercontinental Exchange, Inc.
5.721% 10/16/23 (a)		7,000,000		6,981,149
Nutrien Financial US LLC
5.720% 10/26/23 (a)		11,000,000		10,954,344
5.727% 10/23/23 (a)		9,000,000		8,966,766
Spire, Inc.
5.612% 10/02/23 (a)		3,000,000		2,998,644
Suncor Energy, Inc.
5.751% 10/10/23 (a)		10,000,000		9,983,344
Tampa Electric Co.
5.759% 11/01/23 (a)		8,000,000		7,958,772
TELUS Corp.
5.755% 10/04/23 (a)		4,000,000		3,996,985
				83,638,882
Discount Notes — 0.9%
Federal Home Loan Bank Discount Notes, 5.275%, due 10/02/23 (g)		6,000,000		5,997,385
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (h)		2,574,119		2,574,119
TOTAL SHORT-TERM INVESTMENTS (Cost $92,224,447)				92,210,386

MML Managed Bond Fund —  Portfolio of Investments (Continued)

		Value
TOTAL INVESTMENTS — 113.2% (Cost $827,204,013) (i)		$	734,760,618
Other Assets/(Liabilities) — (13.2)%			(85,419,622)
NET ASSETS — 100.0%		$	649,340,996

Abbreviation Legend

CLO Collateralized Loan Obligation

FRN Floating Rate Note

REMICS Real Estate Mortgage Investment Conduits

SOFR Secured Overnight Financing Rate

STEP Step Up Bond

TBA To Be Announced

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) 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, 2023, the aggregate market value of these securities amounted to $342,090,394 or 52.68% of net assets.

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

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

(d) 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, 2023.

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

(f)	All or a portion of this security is pledged/held as collateral for open derivatives.
(g)	The rate shown represents yield-to-maturity.

(h) Maturity value of $2,574,463. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 1/31/26, and an aggregate market value, including accrued interest, of $2,625,650.

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Long Bond	12/19/23		85	$	10,241,468	$	(570,062)
U.S. Treasury Ultra Bond	12/19/23		250		31,963,750		(2,291,875)
U.S. Treasury Note 2 Year	12/29/23		250		50,792,160		(114,425)
U.S. Treasury Note 5 Year	12/29/23		269		28,631,566		(289,894)
						$	(3,266,256)
Short
U.S. Treasury Ultra 10 Year	12/19/23		40	$	(4,591,621)	$	129,121

Centrally Cleared Credit Default Swaps - Buy Protection

Reference Obligation/Index

Rate Paid by Fund

Payment Frequency

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.IG Series 41†

1.000%

Quarterly

12/20/28

USD

110,000,000

$

(1,306,470)

$

(1,577,287)

$

270,817

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
12-Month USD SOFR	Annually		Fixed 3.965%		Annually		6/23/25	USD	50,000,000	$	(943,210)	$	—	$	(943,210)
12-Month USD SOFR	Annually		Fixed 3.815%		Annually		6/30/25	USD	49,000,000		(1,046,934)		—		(1,046,934)
12-Month USD SOFR	Annually		Fixed 3.749%		Annually		7/14/25	USD	49,141,000		(1,110,228)		—		(1,110,228)
12-Month USD SOFR	Annually		Fixed 3.618%		Annually		8/07/25	USD	49,472,000		(1,240,382)		—		(1,240,382)
Fixed 3.293%	Annually		12-Month USD SOFR		Annually		6/23/33	USD	11,000,000		851,676		—		851,676
Fixed 3.223%	Annually		12-Month USD SOFR		Annually		6/30/33	USD	11,210,000		930,962		—		930,962
Fixed 3.086%	Annually		12-Month USD SOFR		Annually		7/14/33	USD	11,165,000		1,051,132		—		1,051,132
Fixed 3.107%	Annually		12-Month USD SOFR		Annually		8/07/33	USD	11,000,000		1,022,870		—		1,022,870
										$	(484,114)	$	—	$	(484,114)

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

Currency Legend

USD U.S. Dollar

MML Short-Duration Bond Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 84.1%
CORPORATE DEBT — 44.1%
Agriculture — 0.8%
BAT Capital Corp.
4.700% 4/02/27	$	625,000	$	598,406
Imperial Brands Finance PLC
3.125% 7/26/24 (a)		400,000		389,803
				988,209
Auto Manufacturers — 1.6%
Ford Motor Credit Co. LLC
2.300% 2/10/25		645,000		604,989
Hyundai Capital America
6.100% 9/21/28 (a)		305,000		302,824
Nissan Motor Acceptance Co. LLC
1.850% 9/16/26 (a)		1,235,000		1,074,464
				1,982,277
Auto Parts & Equipment — 0.2%
LG Energy Solution Ltd.
5.625% 9/25/26 (a)		250,000		249,191
Banks — 9.7%
ABN AMRO Bank NV
4.750% 7/28/25 (a)		625,000		605,414
Banco Santander SA
1.849% 3/25/26		600,000		539,596
Bank Mandiri Persero Tbk PT
5.500% 4/04/26 (a)		384,000		379,656
Bank of America Corp.
Secured Overnight Financing Rate + 0.960% 1.734% VRN 7/22/27		265,000		234,832
3.950% 4/21/25		178,000		171,879
Barclays PLC
5.200% 5/12/26		1,055,000		1,016,376
BPCE SA
4.625% 7/11/24 (a)		200,000		196,176
5.700% 10/22/23 (a)		805,000		804,234
Citigroup, Inc.
4.450% 9/29/27		465,000		436,564
Danske Bank AS
1 yr. CMT + 0.730% 1.549% VRN 9/10/27 (a) (b)		485,000		423,262
1 yr. CMT + 2.100% 6.466% VRN 1/09/26 (a)		275,000		274,497
Deutsche Bank AG Secured Overnight Financing Rate + 1.219%
2.311% VRN 11/16/27		430,000		374,437
HSBC Holdings PLC
Secured Overnight Financing Rate + 1.430% 2.999% VRN 3/10/26		430,000		409,773
Secured Overnight Financing Rate + 3.350% 7.390% VRN 11/03/28		310,000		320,708

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

	Principal Amount		Value
Huntington Bancshares, Inc. Secured Overnight Financing Rate + 2.020%
6.208% VRN 8/21/29	$	310,000	$	303,258
ING Groep NV Secured Overnight Financing Rate + 1.560%
6.083% VRN 9/11/27		305,000		303,645
JP Morgan Chase & Co. Secured Overnight Financing Rate + 0.765%
1.470% VRN 9/22/27		445,000		389,858
Lloyds Banking Group PLC 1 yr. CMT + 1.700%
5.871% VRN 3/06/29		325,000		317,783
Macquarie Group Ltd. Secured Overnight Financing Rate + 1.069%
1.340% VRN 1/12/27 (a)		845,000		755,954
Morgan Stanley
Secured Overnight Financing Rate + 1.610% 4.210% VRN 4/20/28		245,000		230,369
4.350% 9/08/26		1,150,000		1,096,501
Natwest Group PLC 1 yr. CMT + 0.900%
1.642% VRN 6/14/27		345,000		304,680
Santander UK Group Holdings PLC Secured Overnight Financing Rate + 1.220%
2.469% VRN 1/11/28		370,000		322,014
Societe Generale SA
1 yr. CMT + 1.100% 1.488% VRN 12/14/26 (a)		525,000		468,702
1 yr. CMT + 1.300% 2.797% VRN 1/19/28 (a)		200,000		177,743
Synovus Bank
5.625% 2/15/28		273,000		247,357
UBS Group AG
Secured Overnight Financing Rate Index + 0.980% 1.305% VRN 2/02/27 (a)		450,000		399,064
1 yr. CMT + 1.080% 1.364% VRN 1/30/27 (a)		400,000		355,399
Wells Fargo & Co. Secured Overnight Financing Rate + 1.740%
5.574% VRN 7/25/29		310,000		302,433
				12,162,164
Beverages — 0.6%
Bacardi Ltd.
4.450% 5/15/25 (a)		378,000		366,799
JDE Peet's NV
1.375% 1/15/27 (a)		407,000		351,409
				718,208
Chemicals — 2.5%
Celanese US Holdings LLC
1.400% 8/05/26		250,000		217,690
6.165% 7/15/27		200,000		197,214
6.350% 11/15/28		305,000		301,167
International Flavors & Fragrances, Inc.
1.832% 10/15/27 (a)		400,000		332,230
MEGlobal Canada ULC
5.000% 5/18/25 (a)		450,000		438,750
Orbia Advance Corp. SAB de CV
1.875% 5/11/26 (a)		657,000		585,038
Syngenta Finance NV
4.892% 4/24/25 (a)		335,000		326,658
Yara International ASA
3.800% 6/06/26 (a)		325,000		306,851
4.750% 6/01/28 (a)		450,000		423,479
				3,129,077

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

	Principal Amount		Value
Commercial Services — 0.7%
Triton Container International Ltd.
2.050% 4/15/26 (a)	$	950,000	$	846,349
Distribution & Wholesale — 0.8%
Ferguson Finance PLC
4.250% 4/20/27 (a)		355,000		336,667
Li & Fung Ltd.
5.000% STEP 8/18/25 (a)		675,000		622,183
				958,850
Diversified Financial Services — 4.2%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust
2.450% 10/29/26		405,000		362,757
6.500% 7/15/25		300,000		300,346
Aircastle Ltd.
4.125% 5/01/24		740,000		729,407
ANB Sukuk Ltd. 5 yr. CMT + 2.974%
3.326% VRN 10/28/30 (a)		650,000		609,375
Antares Holdings LP
2.750% 1/15/27 (a)		310,000		262,507
3.950% 7/15/26 (a)		605,000		544,562
Avolon Holdings Funding Ltd.
2.875% 2/15/25 (a)		800,000		755,278
4.250% 4/15/26 (a)		250,000		234,974
BGC Partners, Inc.
4.375% 12/15/25		505,000		468,489
Charles Schwab Corp.
5.875% 8/24/26		685,000		682,744
LeasePlan Corp. NV
2.875% 10/24/24 (a)		280,000		269,367
				5,219,806
Electric — 1.6%
Alliant Energy Finance LLC
1.400% 3/15/26 (a)		260,000		230,670
Enel Finance International NV
1.375% 7/12/26 (a)		620,000		547,520
4.625% 6/15/27 (a)		377,000		359,389
Pacific Gas & Electric Co.
4.950% 6/08/25		380,000		371,058
Pennsylvania Electric Co.
5.150% 3/30/26 (a)		226,000		221,761
Sempra
5.400% 8/01/26		310,000		306,712
				2,037,110
Electronics — 0.2%
Jabil, Inc.
4.250% 5/15/27		285,000		269,521
Engineering & Construction — 0.3%
Mexico City Airport Trust
4.250% 10/31/26 (a)		400,000		375,968

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

	Principal Amount		Value
Entertainment — 0.2%
Warnermedia Holdings, Inc.
3.638% 3/15/25	$	325,000	$	313,459
Food — 1.6%
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
2.500% 1/15/27		860,000		759,655
Pilgrim's Pride Corp.
5.875% 9/30/27 (a)		112,000		113,630
Sigma Alimentos SA de CV
4.125% 5/02/26 (a)		450,000		427,401
Smithfield Foods, Inc.
4.250% 2/01/27 (a)		775,000		716,436
				2,017,122
Forest Products & Paper — 0.5%
Suzano International Finance BV
4.000% 1/14/25		700,000		678,790
Hand & Machine Tools — 0.3%
Regal Rexnord Corp.
6.050% 2/15/26 (a)		325,000		321,377
Health Care – Services — 0.2%
HCA, Inc.
5.200% 6/01/28		315,000		304,438
Home Builders — 0.3%
Toll Brothers Finance Corp.
4.875% 3/15/27		375,000		359,176
Housewares — 0.1%
Newell Brands, Inc.
6.375% 9/15/27 (b)		200,000		190,797
Insurance — 3.0%
Athene Global Funding
1.730% 10/02/26 (a)		445,000		387,836
2.500% 1/14/25 (a)		420,000		396,938
3.205% 3/08/27 (a)		212,000		189,912
CNO Global Funding
1.750% 10/07/26 (a)		714,000		626,948
Corebridge Financial, Inc.
3.650% 4/05/27		235,000		217,546
GA Global Funding Trust
2.250% 1/06/27 (a)		685,000		600,243
Lincoln National Corp.
3.800% 3/01/28 (b)		350,000		317,275
Sammons Financial Group, Inc.
4.450% 5/12/27 (a)		1,140,000		1,043,534
				3,780,232
Internet — 0.2%
Expedia Group, Inc.
4.625% 8/01/27		309,000		294,658

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

	Principal Amount		Value
Investment Companies — 2.9%
Ares Capital Corp.
3.875% 1/15/26	$	535,000	$	500,607
BlackRock TCP Capital Corp.
3.900% 8/23/24		163,000		158,306
Blackstone Private Credit Fund
2.625% 12/15/26		890,000		766,062
2.700% 1/15/25		325,000		307,823
Blue Owl Credit Income Corp.
4.700% 2/08/27		500,000		454,985
Golub Capital BDC, Inc.
2.500% 8/24/26		270,000		236,629
3.375% 4/15/24		330,000		324,103
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
4.750% 9/15/24		445,000		428,609
Sixth Street Specialty Lending, Inc.
3.875% 11/01/24		410,000		398,046
				3,575,170
Leisure Time — 0.2%
Harley-Davidson Financial Services, Inc.
3.350% 6/08/25 (a)		330,000		313,181
Lodging — 0.7%
Las Vegas Sands Corp.
3.200% 8/08/24		875,000		846,528
Machinery – Construction & Mining — 0.5%
Weir Group PLC
2.200% 5/13/26 (a)		680,000		611,053
Mining — 0.7%
Alcoa Nederland Holding BV
6.125% 5/15/28 (a)		395,000		380,338
Indonesia Asahan Aluminium PT/Mineral Industri Indonesia Persero PT
4.750% 5/15/25 (a)		550,000		537,350
				917,688
Oil & Gas — 1.8%
EQT Corp.
6.125% STEP 2/01/25		360,000		358,758
Ovintiv, Inc.
5.375% 1/01/26		275,000		271,141
5.650% 5/15/28		320,000		313,005
Parkland Corp.
5.875% 7/15/27 (a)		193,000		183,658
Patterson-UTI Energy, Inc.
3.950% 2/01/28		685,000		615,185
Ras Laffan Liquefied Natural Gas Co. Ltd. 3
5.838% 9/30/27 (a)		566,550		566,272
				2,308,019
Pharmaceuticals — 1.5%
CVS Health Corp.
5.000% 1/30/29		325,000		314,406

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

	Principal Amount		Value
Hikma Finance USA LLC
3.250% 7/09/25 (a)	$	675,000	$	638,636
Viatris, Inc.
2.300% 6/22/27		1,025,000		881,951
				1,834,993
Pipelines — 1.7%
Columbia Pipelines Holding Co. LLC
6.055% 8/15/26 (a)		280,000		280,878
Energy Transfer LP
4.950% 6/15/28		975,000		933,093
ONEOK, Inc.
5.550% 11/01/26		148,000		147,035
Plains All American Pipeline LP/PAA Finance Corp.
4.500% 12/15/26		90,000		86,036
4.650% 10/15/25		560,000		543,725
Western Midstream Operating LP
6.350% 1/15/29 (b)		97,000		97,200
				2,087,967
Real Estate — 0.0%
Shimao Group Holdings Ltd.
6.125% 2/21/24 (a)		400,000		13,820
Real Estate Investment Trusts (REITS) — 2.7%
CubeSmart LP
2.250% 12/15/28		390,000		326,234
Global Net Lease, Inc./Global Net Lease Operating Partnership LP
3.750% 12/15/27 (a)		335,000		259,372
GLP Capital LP/GLP Financing II, Inc.
5.375% 4/15/26		348,000		337,415
Omega Healthcare Investors, Inc.
4.750% 1/15/28		779,000		720,928
SBA Tower Trust
1.884% 7/15/50 (a)		287,000		259,494
Service Properties Trust
4.350% 10/01/24		935,000		896,949
VICI Properties LP/VICI Note Co., Inc.
3.750% 2/15/27 (a)		325,000		294,909
Vornado Realty LP
2.150% 6/01/26		310,000		263,546
				3,358,847
Retail — 0.4%
Advance Auto Parts, Inc.
5.900% 3/09/26		144,000		139,073
Nordstrom, Inc.
2.300% 4/08/24		268,000		262,385
4.000% 3/15/27 (b)		86,000		75,155
				476,613
Telecommunications — 0.8%
Sprint Capital Corp.
6.875% 11/15/28		310,000		320,074

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

	Principal Amount		Value
Tower Bersama Infrastructure Tbk PT
4.250% 1/21/25 (a)	$	645,000	$	624,048
				944,122
Venture Capital — 0.6%
Hercules Capital, Inc.
2.625% 9/16/26		560,000		486,377
3.375% 1/20/27		270,000		236,073
				722,450
TOTAL CORPORATE DEBT (Cost $59,687,275)				55,207,230
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 37.9%
Auto Floor Plan Asset-Backed Securities — 0.3%
Ford Credit Floorplan Master Owner Trust A, Series 2023-1, Class B
5.310% 5/15/28 (a)		400,000		393,047
Automobile Asset-Backed Securities — 2.0%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-3A, Class C
3.150% 3/20/26 (a)		1,083,000		1,032,405
Carmax Auto Owner Trust, Series 2021-4, Class D
1.480% 3/15/28		250,000		220,886
Carvana Auto Receivables Trust
Series 2021-N1, Class D, 1.500% 1/10/28		286,684		268,065
Series 2021-P3, Class D, 2.250% 9/11/28		855,000		728,022
Santander Revolving Auto Loan Trust, Series 2019-A, Class D
3.450% 1/26/32 (a)		215,000		199,061
				2,448,439
Commercial Mortgage-Backed Securities — 6.0%
BAMLL Commercial Mortgage Securities Trust
Series 2019-BPR, Class CMP, 4.024% VRN 11/05/32 (a) (c)		370,000		314,242
Series 2019-BPR, Class DMP, 4.024% VRN 11/05/32 (a) (c)		450,000		371,514
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD Term SOFR + 1.797%
7.129% FRN 7/15/35 (a)		500,000		487,499
BX Commercial Mortgage Trust
Series 2019-XL, Class E, 1 mo. USD Term SOFR + 1.914% 7.247% FRN 10/15/36 (a)		268,600		265,998
Series 2021-SOAR, Class E, 1 mo. USD Term SOFR + 1.914% 7.248% FRN 6/15/38 (a)		303,588		294,859
Series 2021-VOLT, Class E, 1 mo. USD Term SOFR + 2.114% 7.447% FRN 9/15/36 (a)		792,000		755,366
Series 2019-XL, Class F, 1 mo. USD Term SOFR + 2.114% 7.447% FRN 10/15/36 (a)		753,100		745,098
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD Term SOFR + 2.264%
7.530% FRN 12/15/37 (a)		545,194		538,379
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD Term SOFR + 1.647%
6.980% FRN 5/15/36 (a)		199,504		197,696
KIND Trust
Series 2021-KIND, Class B, 1 mo. USD Term SOFR + 1.464% 6.797% FRN 8/15/38 (a)		546,053		509,580

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

	Principal Amount		Value
Series 2021-KIND, Class C, 1 mo. USD Term SOFR + 1.864% 7.197% FRN 8/15/38 (a)	$	595,695	$	550,540
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD Term SOFR + 1.996%
7.328% FRN 5/15/36 (a)		251,000		247,248
Life Mortgage Trust, Series 2021-BMR, Class E, 1 mo. USD Term SOFR + 1.864%
7.197% FRN 3/15/38 (a)		365,665		351,951
MHC Commercial Mortgage Trust, Series 2021-MHC, Class E, 1 mo. USD Term SOFR + 2.215%
7.547% FRN 4/15/38 (a)		571,944		561,220
One New York Plaza Trust
Series 2020-1NYP, Class C, 1 mo. USD Term SOFR + 2.314% 7.648% FRN 1/15/36 (a)		616,000		539,550
Series 2020-1NYP, Class D, 1 mo. USD Term SOFR + 2.864% 8.198% FRN 1/15/36 (a)		414,000		321,338
VASA Trust, Series 2021-VASA, Class D, 1 mo. USD Term SOFR + 2.214%
7.548% FRN 7/15/39 (a)		711,000		455,194
				7,507,272
Home Equity Asset-Backed Securities — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD Term SOFR + 0.594%
5.914% FRN 10/25/34 (a)		3,510		3,591
Other Asset-Backed Securities — 19.2%
AIMCO CLO 10 Ltd., Series 2019-10A, Class AR, 3 mo. USD Term SOFR + 1.322%
6.667% FRN 7/22/32 (a)		1,000,000		993,960
Apidos CLO XXVI Ltd., Series 2017-26A, Class A2R, 3 mo. USD Term SOFR + 1.762%
7.072% FRN 7/18/29 (a)		500,000		495,819
Aqua Finance Trust, Series 2021-A, Class A
1.540% 7/17/46 (a)		827,982		723,228
Ballyrock CLO Ltd., Series 2020-2A, Class A2R, 3 mo. USD Term SOFR + 1.812%
7.138% FRN 10/20/31 (a)		800,000		784,983
BHG Securitization Trust
Series 2021-B, Class C, 2.240% 10/17/34 (a)		448,000		372,521
Series 2022-C, Class A, 5.320% 10/17/35 (a)		439,785		437,318
BlueMountain Fuji US CLO I Ltd., Series 2017-1A, Class A1R, 3 mo. USD Term SOFR + 1.242%
6.568% FRN 7/20/29 (a)		514,242		512,298
BRE Grand Islander Timeshare Issuer LLC
Series 2017-1A, Class A, 2.940% 5/25/29 (a)		32,870		31,793
Series 2019-A, Class B, 3.780% 9/26/33 (a)		119,380		112,070
Business Jet Securities LLC
Series 2021-1A, Class A, 2.162% 4/15/36 (a)		359,881		327,288
Series 2020-1A, Class A, 2.981% 11/15/35 (a)		59,187		55,489
Canyon Capital CLO Ltd., Series 2017-1A, Class CR, 3 mo. USD Term SOFR + 2.262%
7.570% FRN 7/15/30 (a)		300,000		295,239
CARS-DB4 LP, Series 2020-1A, Class B1
4.170% 2/15/50 (a)		484,000		453,077
Cedar Funding IX CLO Ltd., Series 2018-9A, Class A1, 3 mo. USD Term SOFR + 1.242%
6.568% FRN 4/20/31 (a)		250,000		249,380

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

	Principal Amount		Value
CF Hippolyta Issuer LLC, Series 2020-1, Class B1
2.280% 7/15/60 (a)	$	90,845	$	75,703
CIFC Funding Ltd.
Series 2021-1A, Class A1, 3 mo. USD Term SOFR + 1.372% 6.723% FRN 4/25/33 (a)		500,000		498,815
Series 2017-4A, Class A2R, 3 mo. USD Term SOFR + 1.812% 7.157% FRN 10/24/30 (a)		500,000		495,476
DataBank Issuer, Series 2021-1A, Class A2
2.060% 2/27/51 (a)		991,000		869,892
Elara HGV Timeshare Issuer LLC
Series 2017-A, Class B, 2.960% 3/25/30 (a)		97,442		93,912
Series 2019-A, Class C, 3.450% 1/25/34 (a)		250,376		232,070
Firstkey Homes Trust, Series 2021, Class E2
2.489% 8/17/38 (a)		460,000		395,009
FNA VI LLC, Series 21-1A, Class A
1.350% 1/10/32 (a)		997,548		909,483
Goldman Home Improvement Trust Issuer Trust, Series 2021-GRN2, Class A
1.150% 6/25/51 (a)		385,297		355,038
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 4/15/55 (a)		328,042		276,473
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		157,973		140,703
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		153,306		137,355
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (c)		140,004		126,828
Gracie Point International Funding, Series 2022-3A, Class B, 30 day USD SOFR Average + 4.000%
9.312% FRN 11/01/24 (a)		1,000,000		1,000,238
Hero Funding Trust
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		76,226		63,795
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		73,791		64,217
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		154,114		137,009
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		135,941		123,181
HIN Timeshare Trust, Series 2020-A, Class B
2.230% 10/09/39 (a)		369,744		339,800
Horizon Aircraft Finance III Ltd.
Series 2019-2, Class A, 3.425% 11/15/39 (a)		353,314		277,810
Series 2019-2, Class B, 4.458% 11/15/39 (a)		683,333		321,163
JG Wentworth XXII LLC, Series 2010-3A, Class A
3.820% 12/15/48 (a)		70,464		67,184
KKR CLO 28 LTD, Series 28A, Class A, 3 mo. USD Term SOFR + 1.402%
6.811% FRN 3/15/31 (a)		238,316		237,735
KREF Ltd., Series 2021-FL2, Class AS, 1 mo. USD Term SOFR + 1.414%
6.747% FRN 2/15/39 (a)		900,000		861,276
Lakeview Trust, Series 2022-1, Class M3
4.585% 4/25/52 (a)		1,600,000		1,574,795
Madison Park Funding XXXII Ltd., Series 2018-32A, Class BR, 3 mo. USD Term SOFR + 1.662%
7.007% FRN 1/22/31 (a)		500,000		492,693
Mosaic Solar Loan Trust, Series 2018-2GS, Class A
4.200% 2/22/44 (a)		126,209		112,241
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (a)		27,886		26,105
Neuberger Berman Loan Advisers CLO 25 Ltd., Series 2017-25A, Class BR, 3 mo. USD Term SOFR + 1.612%
6.922% FRN 10/18/29 (a)		1,000,000		986,720
Newark BSL CLO 2 Ltd., Series 2017-1A, Class A2R, 3 mo. USD Term SOFR + 1.662%
7.013% FRN 7/25/30 (a)		250,000		246,612

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

	Principal Amount		Value
NP SPE II LLC, Series 2017-1A, Class A1
3.372% 10/21/47 (a)	$	83,422	$	78,155
Oak Street Investment Grade Net Lease Fund, Series 2020-1A, Class A3
2.260% 11/20/50 (a)		400,000		343,744
Orange Lake Timeshare Trust, Series 2016-A, Class B
2.910% 3/08/29 (a)		29,776		28,505
Oxford Finance Funding LLC, Series 2020-1A, Class A2
3.101% 2/15/28 (a)		74,320		72,357
Palmer Square CLO Ltd., Series 2020-3A, Class A2R, 3 mo. USD Term SOFR + 1.862%
7.226% FRN 11/15/31 (a)		500,000		497,563
PVONE 2023-1, LLC, Series 2023-1, Class A
7.670% 9/17/35 (a) (d)		600,000		599,999
Rad CLO 1 Ltd., Series 2018-1A, Class BR, 3 mo. USD Term SOFR + 1.662%
6.970% FRN 7/15/31 (a)		350,000		346,467
Residential Asset Mortgage Products Trust, Series 2005-EFC1, Class M5, 1 mo. USD Term SOFR + 0.764%
6.409% FRN 5/25/35		153,745		149,143
RR 19 Ltd., Series 2021-19A, Class A1, 3 mo. USD Term SOFR + 1.402%
6.710% FRN 10/15/35 (a)		500,000		496,644
SBA Tower Trust, Series 2014-2A, Class C,
3.869% STEP 10/15/49 (a)		430,000		418,510
Sierra Timeshare Receivables Funding LLC, Series 2020-2A, Class C
3.510% 7/20/37 (a)		27,259		25,811
Store Master Funding I-VII, Series 2018-1A, Class A3
4.400% 10/20/48 (a)		499,633		452,752
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD Term SOFR + 1.314%
6.634% FRN 11/25/35 (a)		71,980		70,217
TAL Advantage VII LLC, Series 2020-1A, Class B
3.290% 9/20/45 (a)		616,500		540,488
TICP CLO XI Ltd., Series 2018-11A, Class A, 3 mo. USD Term SOFR + 1.442%
6.768% FRN 10/20/31 (a)		400,000		399,700
TICP CLO XV Ltd., Series 2020-15A, Class A, 3 mo. USD Term SOFR + 1.542%
6.868% FRN 4/20/33 (a)		1,000,000		996,789
Vantage Data Centers Issuer LLC, Series 2020-1A, Class A2
1.645% 9/15/45 (a)		675,000		607,828
Verde CLO Ltd., Series 2019-1A, Class AR, 3 mo. USD Term SOFR + 1.362%
6.670% FRN 4/15/32 (a)		500,000		497,242
				24,005,708
Student Loans Asset-Backed Securities — 3.9%
College Avenue Student Loans LLC
Series 2021-A, Class B, 2.320% 7/25/51 (a)		707,740		614,280
Series 2017-A, Class B, 4.500% 11/26/46 (a)		245,963		224,715
Series 2018-A, Class A1, 1 mo. USD Term SOFR + 1.314% 6.634% FRN 12/26/47 (a)		232,073		229,225
Series 2017-A, Class A1, 1 mo. USD Term SOFR + 1.764% 7.084% FRN 11/26/46 (a)		162,417		163,190
Commonbond Student Loan Trust
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		15,872		12,750
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		17,651		14,343
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		8,415		7,241
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		38,224		34,049

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

	Principal Amount		Value
ELFI Graduate Loan Program LLC, Series 2018-A, Class B
4.000% 8/25/42 (a)	$	49,231	$	43,680
Laurel Road Prime Student Loan Trust
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		256,646		236,131
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		172,101		162,691
Navient Private Education Refi Loan Trust, Series 2020-BA, Class B
2.770% 1/15/69 (a)		2,200,000		1,719,891
Nelnet Student Loan Trust, Series 2015-3A, Class B, 30 day USD SOFR Average + 1.614%
6.929% FRN 6/25/54 (a)		130,000		121,036
Pennsylvania Higher Education Assistance Agency, Series 2006-2, Class B,
6.180% FRN 10/25/42 (c)		200,000		193,697
SLM Student Loan Trust
Series 2006-5, Class B, 90 day USD SOFR Average + 0.472% 5.526% FRN 10/25/40		290,930		273,357
Series 2005-6, Class B, 90 day USD SOFR Average + 0.552% 5.606% FRN 1/25/44		292,409		271,964
Series 2005-9, Class B, 90 day USD SOFR Average + 0.562% 5.616% FRN 1/25/41		266,601		241,461
Series 2005-8, Class B, 90 day USD SOFR Average + 0.572% 5.626% FRN 1/25/55		110,387		101,903
SMB Private Education Loan Trust
Series 2018-C, Class A2B, 1 mo. USD Term SOFR + 0.864% 6.197% FRN 11/15/35 (a)		192,236		189,526
Series 2016-C, Class A2B, 1 mo. USD Term SOFR + 1.214% 6.547% FRN 9/15/34 (a)		39,738		39,413
				4,894,543
Whole Loan Collateral Collateralized Mortgage Obligations — 6.4%
A&D Mortgage Trust, Series 2023-NQM3, Class A1,
6.733% STEP 7/25/68 (a)		1,183,434		1,181,135
Angel Oak Mortgage Trust, Series 2020-5, Class A3,
2.041% VRN 5/25/65 (a) (c)		72,042		66,004
Banc of America Mortgage Trust, Series 2004-G, Class 2A7,
5.348% VRN 8/25/34 (c)		1,072		1,020
BRAVO Residential Funding Trust, Series 2020-NQM1, Class A3,
2.406% VRN 5/25/60 (a) (c)		55,187		51,887
CIM Trust, Series 2019-INV3, Class A11, 30 day USD SOFR Average + 1.114%
5.500% FRN 8/25/49 (a)		292,872		275,427
Credit Suisse Mortgage Trust
Series 2021-NQM2, Class A3, 1.538% VRN 2/25/66 (a) (c)		459,300		373,959
Series 2021-NQM4, Class M1, 2.472% VRN 5/25/66 (a) (c)		500,000		298,685
Deephaven Residential Mortgage Trust, Series 2021-1, Class A3,
1.128% VRN 5/25/65 (a) (c)		129,004		116,837
Flagstar Mortgage Trust, Series 2021-6INV, Class A18,
2.500% VRN 8/25/51 (a) (c)		551,094		404,171
MFA Trust, Series 2021-NQM2, Class A3,
1.472% VRN 11/25/64 (a) (c)		359,206		292,194
New Residential Mortgage Loan Trust, Series 2016-4A, Class A1,
3.750% VRN 11/25/56 (a) (c)		108,783		98,824
NewRez Warehouse Securitization Trust, Series 2021-1, Class C, 1 mo. USD Term SOFR + 1.164%
6.484% FRN 5/25/55 (a)		803,400		799,334
NLT Trust
Series 2021-INV2, Class A3, 1.520% VRN 8/25/56 (a) (c)		649,913		533,337
Series 2021-INV2, Class M1, 2.569% VRN 8/25/56 (a) (c)		700,000		446,326
OBX Trust

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

	Principal Amount		Value
Series 2021-NQM3, Class A3, 1.362% VRN 7/25/61 (a) (c)	$	765,591	$	565,588
Series 2021-NQM1, Class M1, 2.219% VRN 2/25/66 (a) (c)		333,000		191,143
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 3.850%
9.284% FRN 2/25/25 (a)		250,000		249,913
STAR Trust, Series 2021-1, Class A3,
1.528% VRN 5/25/65 (a) (c)		517,259		435,101
Starwood Mortgage Residential Trust
Series 2021-3, Class A3, 1.518% VRN 6/25/56 (a) (c)		202,070		165,204
Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (c)		532,984		503,885
Verus Securitization Trust
Series 2021-5, Class A3, 1.373% VRN 9/25/66 (a) (c)		188,562		148,678
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (c)		265,000		229,356
Series 2020-4, Class M1, 3.291% VRN 5/25/65 (a) (c)		548,000		460,280
Series 2019-INV2, Class A3, 4.219% VRN 7/25/59 (a) (c)		197,944		190,169
				8,078,457
Whole Loan Collateral Support Collateralized Mortgage Obligations — 0.1%
OBX Trust, Series 2020-INV1, Class A21,
3.500% VRN 12/25/49 (a) (c)		131,090		108,742
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $52,277,216)				47,439,799
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (e) — 1.6%
Pass-Through Securities — 0.0%
Federal National Mortgage Association Pool #775539 RFUCC1 yr. Treasury + 1.641% 5.391% 5/01/34		2,094		2,109
Government National Mortgage Association
Pool #352022 7.000% 11/15/23		2		2
Pool #491089 7.000% 12/15/28		414		414
Pool #500928 7.000% 5/15/29		407		413
Pool #510083 7.000% 7/15/29		24		24
Pool #493723 7.000% 8/15/29		309		314
Pool #581417 7.000% 7/15/32		569		575
Government National Mortgage Association II
Pool #008746 1 yr. CMT + 1.500% 2.750% FRN 11/20/25		129		125
Pool #080136 1 yr. CMT + 1.500% 2.750% FRN 11/20/27		47		46
				4,022
Whole Loans — 1.6%
Federal Home Loan Mortgage Corp. STACR REMICS Trust
Series 2021-DNA6, Class M2, 30 day USD SOFR Average + 1.500% 6.815% FRN 10/25/41 (a)		1,046,000		1,031,319
Series 2021-DNA2, Class M2, 30 day USD SOFR Average + 2.300% 7.615% FRN 8/25/33 (a)		1,031,311		1,039,657
				2,070,976
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $2,081,019)				2,074,998

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

	Principal Amount		Value
U.S. TREASURY OBLIGATIONS — 0.5%
U.S. Treasury Bonds & Notes — 0.5%
U.S. Treasury Notes
1.750% 12/31/24	$	700,000	$	669,691
TOTAL U.S. TREASURY OBLIGATIONS (Cost $705,051)				669,691
TOTAL BONDS & NOTES (Cost $114,750,561)				105,391,718
TOTAL LONG-TERM INVESTMENTS (Cost $114,750,561)				105,391,718
SHORT-TERM INVESTMENTS — 15.8%
Commercial Paper — 12.7%
Aon Corp.
5.718% 11/28/23		1,000,000		990,800
Entergy Corp.
5.684% 11/13/23 (a)		3,000,000		2,979,131
Hyundai Capital America
5.692% 11/28/23 (a)		2,000,000		1,981,400
Nutrien Financial US LLC
5.720% 10/26/23 (a)		2,000,000		1,991,699
Spire, Inc.
5.741% 11/06/23 (a)		1,000,000		994,133
Suncor Energy, Inc.
5.751% 10/10/23 (a)		2,000,000		1,996,669
Tampa Electric Co.
5.707% 10/10/23 (a)		1,000,000		998,329
5.759% 11/01/23 (a)		4,000,000		3,979,386
				15,911,547
Discount Notes — 0.8%
Federal Home Loan Bank, 5.275%, due 10/02/23		1,000,000		999,564
	Number of Shares
Investment of Cash Collateral from Securities Loaned — 0.6%
State Street Navigator Securities Lending Government Money Market Portfolio (f)		709,660		709,660
	Principal Amount
Repurchase Agreement — 1.7%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (g)	$	2,140,257		2,140,257
TOTAL SHORT-TERM INVESTMENTS (Cost $19,763,687)				19,761,028

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

		Value
TOTAL INVESTMENTS — 99.9% (Cost $134,514,248) (h)		$	125,152,746
Other Assets/(Liabilities) — 0.1%			101,593
NET ASSETS — 100.0%		$	125,254,339

Abbreviation Legend

CLO Collateralized Loan Obligation

LIBOR London Inter-Bank Offered Rate

FRN Floating Rate Note

REMICS Real Estate Mortgage Investment Conduits

SOFR Secured Overnight Financing Rate

STEP Step Up Bond

VRN Variable Rate Note

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) 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, 2023, the aggregate market value of these securities amounted to $87,973,435 or 70.24% of net assets.

(b) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $694,948 or 0.55% of net assets. (Note 2).

(c) 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, 2023.

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2023, these securities amounted to a value of $599,999 or 0.48% of net assets.

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

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

(g) Maturity value of $2,140,542. Collateralized by U.S. Government Agency obligations with a rate of 0.375%, maturity date of 1/31/26, and an aggregate market value, including accrued interest, of $2,183,121.

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation (Depreciation)
Long
U.S. Treasury Note 2 Year	12/29/23		305	$	62,060,937	$	(234,101)
Short
U.S. Treasury Long Bond	12/19/23		2	$	(243,119)	$	15,556
U.S. Treasury Ultra 10 Year	12/19/23		13		(1,491,911)		41,598
U.S. Treasury Note 5 Year	12/29/23		157		(16,677,214)		135,792
						$	192,946

Centrally Cleared Credit Default Swaps - Buy Protection

Reference Obligation/Index

Rate Paid by Fund

Payment Frequency

Termination Date

Notional Amount

Value

Upfront Premium Paid/ (Received)

Unrealized Appreciation (Depreciation)

CDX.NA.IG Series 41†

1.000%

Quarterly

12/20/28

USD

10,000,000

$

(118,770)

$

(143,390)

$

24,620

Centrally Cleared Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference		Frequency		Termination Date		Notional Amount		Value		Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
12-Month USD SOFR	Annually		Fixed 3.965		Annually		6/23/25	USD	4,000,000	$	(75,457)	$	—	$	(75,457)
12-Month USD SOFR	Annually		Fixed 3.815		Annually		6/30/25	USD	4,700,000		(100,420)		—		(100,420)
12-Month USD SOFR	Annually		Fixed 3.749		Annually		7/14/25	USD	4,713,000		(106,479)		—		(106,479)
12-Month USD SOFR	Annually		Fixed 3.618		Annually		8/07/25	USD	4,796,000		(120,247)		—		(120,247)
Fixed 3.293%	Annually		12-Month USD SOFR		Annually		6/23/33	USD	1,000,000		77,425		—		77,425
Fixed 3.223%	Annually		12-Month USD SOFR		Annually		6/30/33	USD	950,000		78,895		—		78,895
Fixed 3.086%	Annually		12-Month USD SOFR		Annually		7/14/33	USD	946,000		89,061		—		89,061
Fixed 3.107%	Annually		12-Month USD SOFR		Annually		8/07/33	USD	1,071,000		99,590		—		99,590
										$	(57,632)	$	—	$	(57,632)

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

Currency Legend

USD U.S. Dollar

MML Small Cap Equity Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.3%
COMMON STOCK — 98.3%
Basic Materials — 2.4%
Iron & Steel — 0.8%
Commercial Metals Co.		19,392	$	958,159
Mining — 1.6%
Century Aluminum Co. (a)		74,008		532,117
Kaiser Aluminum Corp.		16,381		1,232,834
				1,764,951
				2,723,110
Communications — 2.3%
Internet — 1.2%
Ziff Davis, Inc. (a)		21,054		1,340,929
Telecommunications — 1.1%
DigitalBridge Group, Inc.		70,211		1,234,310
				2,575,239
Consumer, Cyclical — 13.5%
Apparel — 0.9%
Steven Madden Ltd. (b)		29,828		947,636
Auto Parts & Equipment — 4.0%
Allison Transmission Holdings, Inc.		29,415		1,737,250
Dorman Products, Inc. (a)		17,355		1,314,815
Visteon Corp. (a)		10,396		1,435,375
				4,487,440
Home Builders — 1.0%
KB Home		24,947		1,154,547
Home Furnishing — 0.7%
Tempur Sealy International, Inc.		19,231		833,472
Leisure Time — 0.4%
Topgolf Callaway Brands Corp. (a)		35,236		487,666
Lodging — 1.0%
Boyd Gaming Corp.		17,431		1,060,328
Retail — 5.5%
AutoNation, Inc. (a)		15,597		2,361,386
BJ's Wholesale Club Holdings, Inc. (a)		18,961		1,353,246
Murphy USA, Inc.		1,997		682,435

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

	Number of Shares		Value
Papa John's International, Inc. (b)		9,532	$	650,273
Texas Roadhouse, Inc.		11,253		1,081,413
				6,128,753
				15,099,842
Consumer, Non-cyclical — 20.6%
Beverages — 0.8%
Coca-Cola Consolidated, Inc.		1,477		939,845
Biotechnology — 4.1%
ADMA Biologics, Inc. (a)		198,244		709,714
Bridgebio Pharma, Inc. (a)		25,382		669,323
Guardant Health, Inc. (a)		34,358		1,018,371
Immunovant, Inc. (a)		8,083		310,307
Intra-Cellular Therapies, Inc. (a)		19,078		993,773
Structure Therapeutics, Inc. ADR (a)		4,372		220,436
Twist Bioscience Corp. (a)		31,315		634,442
				4,556,366
Commercial Services — 3.9%
ABM Industries, Inc.		18,186		727,622
ASGN, Inc. (a)		18,929		1,546,121
Korn Ferry		26,765		1,269,731
Marqeta, Inc. Class A (a)		127,637		763,269
				4,306,743
Health Care – Products — 2.6%
10X Genomics, Inc. Class A (a)		13,368		551,430
AtriCure, Inc. (a)		27,870		1,220,706
BioLife Solutions, Inc. (a) (b)		33,618		464,264
TransMedics Group, Inc. (a) (b)		13,133		719,032
				2,955,432
Health Care – Services — 5.4%
Acadia Healthcare Co., Inc. (a)		30,705		2,158,868
Addus HomeCare Corp. (a)		12,945		1,102,785
Encompass Health Corp.		17,475		1,173,621
Tenet Healthcare Corp. (a)		23,697		1,561,395
				5,996,669
Pharmaceuticals — 3.8%
Ascendis Pharma AS ADR (a)		9,399		880,123
BellRing Brands, Inc. (a)		48,175		1,986,255
Collegium Pharmaceutical, Inc. (a)		36,978		826,458
Revance Therapeutics, Inc. (a) (b)		49,421		566,859
				4,259,695
				23,014,750
Energy — 6.3%
Oil & Gas — 4.1%
Chesapeake Energy Corp. (b)		14,951		1,289,225

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

	Number of Shares		Value
CNX Resources Corp. (a) (b)		79,305	$	1,790,707
Helmerich & Payne, Inc.		36,926		1,556,800
				4,636,732
Oil & Gas Services — 0.8%
Nov, Inc.		42,336		884,822
Pipelines — 1.4%
Equitrans Midstream Corp.		166,857		1,563,450
				7,085,004
Financial — 15.0%
Banks — 3.8%
Bank of NT Butterfield & Son Ltd.		20,480		554,598
Cathay General Bancorp		30,339		1,054,584
Columbia Banking System, Inc.		37,020		751,506
Webster Financial Corp.		24,114		972,035
Wintrust Financial Corp.		12,579		949,715
				4,282,438
Diversified Financial Services — 3.9%
Federated Hermes, Inc.		42,542		1,440,897
PennyMac Financial Services, Inc.		16,801		1,118,947
Stifel Financial Corp.		29,059		1,785,385
				4,345,229
Insurance — 1.3%
Definity Financial Corp. (b)		50,650		1,398,399
Real Estate Investment Trusts (REITS) — 3.4%
DiamondRock Hospitality Co.		184,768		1,483,687
Four Corners Property Trust, Inc.		62,456		1,385,898
Outfront Media, Inc.		97,628		986,043
				3,855,628
Savings & Loans — 2.6%
Berkshire Hills Bancorp, Inc.		36,513		732,086
OceanFirst Financial Corp.		43,326		626,927
Pacific Premier Bancorp, Inc.		45,109		981,572
WSFS Financial Corp.		16,873		615,864
				2,956,449
				16,838,143
Industrial — 22.5%
Aerospace & Defense — 1.9%
Curtiss-Wright Corp.		10,657		2,084,829
Building Materials — 1.8%
Summit Materials, Inc. Class A (a)		64,536		2,009,651
Electrical Components & Equipment — 1.2%
Belden, Inc.		14,335		1,384,044

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

	Number of Shares		Value
Electronics — 4.3%
Atkore, Inc. (a)		16,153	$	2,409,866
Itron, Inc. (a)		18,213		1,103,344
Vishay Intertechnology, Inc.		52,177		1,289,815
				4,803,025
Engineering & Construction — 1.9%
TopBuild Corp. (a)		8,565		2,154,954
Environmental Controls — 1.2%
Casella Waste Systems, Inc. Class A (a)		16,919		1,290,920
Hand & Machine Tools — 0.8%
Regal Rexnord Corp.		6,047		863,995
Machinery – Construction & Mining — 1.1%
BWX Technologies, Inc.		16,857		1,263,938
Machinery – Diversified — 2.4%
Esab Corp.		14,890		1,045,576
Zurn Elkay Water Solutions Corp. Class C		59,317		1,662,062
				2,707,638
Metal Fabricate & Hardware — 1.1%
Valmont Industries, Inc.		5,254		1,262,063
Miscellaneous - Manufacturing — 1.8%
EnPro Industries, Inc.		17,077		2,069,562
Packaging & Containers — 1.1%
Silgan Holdings, Inc.		28,184		1,215,012
Transportation — 1.9%
CryoPort, Inc. (a) (b)		43,253		592,999
Hub Group, Inc. Class A (a)		18,931		1,486,841
				2,079,840
				25,189,471
Technology — 14.7%
Computers — 3.4%
CACI International, Inc. Class A (a)		4,911		1,541,711
Endava PLC Sponsored ADR (a)		20,032		1,148,835
KBR, Inc.		18,664		1,100,056
				3,790,602
Semiconductors — 4.0%
Allegro MicroSystems, Inc. (a)		31,197		996,432
MACOM Technology Solutions Holdings, Inc. (a)		21,373		1,743,609
MKS Instruments, Inc.		11,223		971,239
Silicon Laboratories, Inc. (a)		6,378		739,146
				4,450,426
Software — 7.3%
Consensus Cloud Solutions, Inc. (a)		7,070		178,023

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

	Number of Shares		Value
Envestnet, Inc. (a)		18,721	$	824,286
Evolent Health, Inc. Class A (a)		35,093		955,582
Gitlab, Inc. Class A (a)		27,860		1,259,829
HashiCorp, Inc. Class A (a)		41,115		938,655
Paycor HCM, Inc. (a) (b)		66,137		1,509,908
Progress Software Corp.		19,116		1,005,119
Sprout Social, Inc. Class A (a) (b)		30,834		1,538,000
				8,209,402
				16,450,430
Utilities — 1.0%
Electric — 1.0%
Portland General Electric Co.		27,322		1,105,995
TOTAL COMMON STOCK (Cost $83,669,488)				110,081,984
TOTAL EQUITIES (Cost $83,669,488)				110,081,984
TOTAL LONG-TERM INVESTMENTS (Cost $83,669,488)				110,081,984
	Principal Amount
SHORT-TERM INVESTMENTS — 2.3%
Repurchase Agreement — 2.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (c)	$	2,636,879		2,636,879
TOTAL SHORT-TERM INVESTMENTS (Cost $2,636,879)				2,636,879
TOTAL INVESTMENTS — 100.6% (Cost $86,306,367) (d)				112,718,863
Other Assets/(Liabilities) — (0.6)%				(718,275)
NET ASSETS — 100.0%			$	112,000,588

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, 2023, was $8,512,331 or 7.60% of net assets. The Fund received $8,755,795 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 $2,637,230. Collateralized by U.S. Government Agency obligations with a rate of 0.500%, maturity date of 2/28/26, and an aggregate market value, including accrued interest, of $2,689,620.

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

MML Strategic Emerging Markets Fund —  Portfolio of Investments

September 30, 2023 (Unaudited)

	Number of Shares		Value
EQUITIES — 94.3%
COMMON STOCK — 93.1%
Brazil — 6.0%
Ambev SA		354,012	$	923,317
Arezzo Industria e Comercio SA		6,536		84,467
B3 SA - Brasil Bolsa Balcao		146,500		358,195
Localiza Rent a Car SA		11,000		128,151
NU Holdings Ltd. Class A (a)		77,015		558,359
Raia Drogasil SA		3,400		18,682
Vale SA Sponsored ADR		31,443		421,336
WEG SA		28,884		208,418
				2,700,925
Chile — 1.0%
Antofagasta PLC		9,582		165,991
Banco Santander Chile		6,334,468		293,325
				459,316
China — 24.3%
BeiGene Ltd. ADR (a)		2,360		424,493
H World Group Ltd. (a)		4,200		16,564
H World Group Ltd. ADR (a)		50,220		1,980,175
Meituan Class B (a) (b)		28,330		411,276
MicroTech Medical Hangzhou Co. Ltd. Class H (a) (b)		14,500		7,361
NetEase, Inc. ADR		11,706		1,172,473
New Horizon Health Ltd. (a) (b)		57,500		137,777
PDD Holdings, Inc. ADR (a)		6,660		653,146
Silergy Corp.		5,000		47,231
Tencent Holdings Ltd.		31,809		1,232,760
Wuxi Biologics Cayman, Inc. (a) (b)		22,000		129,210
Yum China Holdings, Inc.		44,176		2,461,487
Zai Lab Ltd. ADR (a) (c)		5,692		138,373
ZTO Express Cayman, Inc.		5,337		128,876
ZTO Express Cayman, Inc. ADR		79,276		1,916,101
				10,857,303
France — 5.4%
L'Oreal SA		241		99,808
Pernod Ricard SA		10,450		1,739,516
TotalEnergies SE		8,830		581,079
				2,420,403
Hong Kong — 0.7%
AIA Group Ltd.		40,200		325,180
India — 19.4%
Havells India Ltd.		13,273		220,030

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

	Number of Shares		Value
HCL Technologies Ltd.		8,432	$	125,306
HDFC Bank Ltd.		157,590		2,885,041
Kotak Mahindra Bank Ltd.		120,498		2,519,939
Oberoi Realty Ltd.		35,554		493,282
Tata Consultancy Services Ltd.		57,523		2,437,584
				8,681,182
Indonesia — 1.1%
Bank Central Asia Tbk PT		663,800		378,711
Bank Rakyat Indonesia Persero Tbk PT		281,700		95,200
				473,911
Italy — 1.8%
Ermenegildo Zegna NV		12,434		173,081
PRADA SpA		109,900		642,910
				815,991
Japan — 0.6%
Daiichi Sankyo Co. Ltd.		9,900		271,714
Mexico — 11.5%
America Movil SAB de CV ADR		48,890		846,775
Fomento Economico Mexicano SAB de CV		79,664		868,430
Grupo Mexico SAB de CV Series B		497,369		2,350,499
Wal-Mart de Mexico SAB de CV		292,630		1,104,530
				5,170,234
Netherlands — 0.5%
Argenx SE ADR (a)		457		224,675
Peru — 1.0%
Credicorp Ltd.		3,375		431,899
Philippines — 1.1%
SM Investments Corp.		32,355		482,690
Poland — 0.0%
Allegro.eu SA (a) (b)		1,553		11,421
Portugal — 1.1%
Galp Energia SGPS SA		32,120		475,799
Republic of Korea — 6.6%
Kakao Corp.		4,932		160,549
LG Chem Ltd.		2,085		766,569
LG H&H Co. Ltd.		362		119,200
Samsung Biologics Co. Ltd. (a) (b)		1,500		755,086
Samsung Electronics Co. Ltd.		22,528		1,141,380
				2,942,784
Russia — 0.0%
Novatek PJSC (a) (b) (d) (e)		4,829		—
Sberbank of Russia PJSC (d) (e)		7,525		—
				—

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

	Number of Shares		Value
South Africa — 0.6%
FirstRand Ltd.		82,123	$	276,769
Switzerland — 2.7%
Cie Financiere Richemont SA Registered Class A		10,014		1,220,130
Taiwan — 7.7%
MediaTek, Inc.		2,000		45,691
Taiwan Semiconductor Manufacturing Co. Ltd.		209,000		3,391,671
				3,437,362
TOTAL COMMON STOCK (Cost $41,214,578)				41,679,688
PREFERRED STOCK — 1.2%
Brazil — 1.2%
Banco Bradesco SA 7.049%
		101,945		290,023
Itau Unibanco Holding SA 5.496%
		41,900		226,815
				516,838
TOTAL PREFERRED STOCK (Cost $599,454)				516,838
TOTAL EQUITIES (Cost $41,814,032)				42,196,526
WARRANTS — 0.0%
Switzerland — 0.0%
Cie Financiere Richemont SA, Expires 11/22/23, Strike 67.00 (a)		22,580		16,769
TOTAL WARRANTS (Cost $0)				16,769
RIGHTS — 0.0%
Brazil — 0.0%
Localiza Rent a Car SA (a) (f)		80		255
TOTAL RIGHTS (Cost $0)				255
TOTAL LONG-TERM INVESTMENTS (Cost $41,814,032)				42,213,550
SHORT-TERM INVESTMENTS — 6.1%
Investment of Cash Collateral from Securities Loaned — 0.0%
State Street Navigator Securities Lending Government Money Market Portfolio (g)		3,975		3,975
	Principal Amount
Repurchase Agreement — 6.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 9/29/23, 1.600%, due 10/02/23 (h)	$	2,722,236		2,722,236

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

		Value
TOTAL SHORT-TERM INVESTMENTS (Cost $2,726,211)		$	2,726,211
TOTAL INVESTMENTS — 100.4% (Cost $44,540,243) (i)			44,939,761
Other Assets/(Liabilities) — (0.4)%			(164,083)
NET ASSETS — 100.0%		$	44,775,678

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) 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, 2023, the aggregate market value of these securities amounted to $1,452,131 or 3.24% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of September 30, 2023, was $135,289 or 0.30% of net assets. The Fund received $134,879 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).

(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At September 30, 2023, these securities amounted to a value of $0 or 0.00% of net assets.

(e) Investment is valued using significant unobservable inputs.

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

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

(h) Maturity value of $2,722,599. Collateralized by U.S. Government Agency obligations with a rate of 0.625%, maturity date of 1/15/26, and an aggregate market value, including accrued interest, of $2,776,769.

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

Notes to Portfolio of Investments (Unaudited)

1. The Funds

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

MML Blend Fund ("Blend Fund")

MML Dynamic Bond Fund ("Dynamic Bond Fund")

MML Equity Fund ("Equity Fund")

MML Equity Rotation Fund ("Equity Rotation Fund")

MML High Yield Fund ("High Yield Fund")

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

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

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

MML Managed Bond Fund ("Managed Bond Fund")

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

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

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

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

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

2. Significant Accounting Policies

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

Investment Valuation

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

Investments in equity or debt issued by privately held companies or funds ("Private Company" or collectively, the "Private Companies") and any other investments fair valued using significant unobservable inputs may be fair valued using one or a combination of, but not limited to, the following inputs:

Market approach: (i) recent market transactions, including subsequent rounds of financing, in the underlying investment or comparable issuers; (ii) recapitalizations and other transactions across the capital structure; and (iii) market multiples of comparable issuers.

Income approach: (i) future cash flows discounted to present value and adjusted as appropriate for liquidity, credit, and/or market risks; (ii) quoted prices for similar investments or assets in active markets; and (iii) other risk factors, such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks, recovery rates, liquidation amounts, and/or default rates.

Cost approach: (i) audited or unaudited financial statements, investor communications, and financial or operational metrics issued by the Private Company; (ii) changes in the valuation of relevant indexes or publicly traded companies comparable to the Private Company; (iii) relevant news and other public sources; and (iv) known secondary market transactions in the Private Company's interests and merger or acquisition activity in companies comparable to the Private Company.

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

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

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

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

The Small Cap Equity Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of September 30, 2023. For the Fund noted in the preceding sentence, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

Notes to Portfolio of Investments (Unaudited) (Continued)

The following is the aggregate value by input level, as of September 30, 2023, for the remaining Funds' investments:

Blend Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Mutual Funds	$	635,499,057	$	—	$	—	$	635,499,057
Short-Term Investments		25,026,495		—		—		25,026,495
Total Investments	$	660,525,552	$	—	$	—	$	660,525,552

Notes to Portfolio of Investments (Unaudited) (Continued)

Dynamic Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Bank Loans	$	—		$	6,836,692		$	—	$	6,836,692
Corporate Debt		—			82,402,547			—		82,402,547
Non-U.S. Government Agency Obligations		—			24,459,558			—		24,459,558
Sovereign Debt Obligations		—			14,579,858			—		14,579,858
U.S. Government Agency Obligations and Instrumentalities		—			82,902,273			—		82,902,273
U.S. Treasury Obligations		—			2,447,761			—		2,447,761
Purchased Options		464,545			2,115			—		466,660
Short-Term Investments		2,738,555			8,655,617			—		11,394,172
Total Investments	$	3,203,100		$	222,286,421		$	—	$	225,489,521
Asset Derivatives
Forward Contracts	$	—		$	418,070		$	—	$	418,070
Futures Contracts		855,370			—			—		855,370
Swap Agreements		—			2,623,257			—		2,623,257
Total	$	855,370		$	3,041,327		$	—	$	3,896,697
Liability Derivatives
Forward Contracts	$	—		$	(803,333	)	$	—	$	(803,333	)
Futures Contracts		(2,147,129	)		—			—		(2,147,129	)
Swap Agreements		—			(596,662	)		—		(596,662	)
Written Options		(638,990	)		(5,148	)		—		(644,138	)
Total	$	(2,786,119	)	$	(1,405,143	)	$	—	$	(4,191,262	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	744,656,608	$	1,640,649	*	$	—	$	746,297,257
Mutual Funds		9,807,572		—			—		9,807,572
Short-Term Investments		1,769,423		4,111,603			—		5,881,026
Total Investments	$	756,233,603	$	5,752,252		$	—	$	761,985,855

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Rotation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock	$	47,923,387	$	—	$	2,180	$	47,925,567
Short-Term Investments		5,277		—		—		5,277
Total Investments	$	47,928,664	$	—	$	2,180	$	47,930,844

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Bank Loans	$	—	$	1,781,725	$	—	$	1,781,725
Corporate Debt		—		46,206,852		—		46,206,852
Short-Term Investments		2,784,180		846,091		—		3,630,271
Total Investments	$	2,784,180	$	48,834,668	$	—	$	51,618,848

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Non-U.S. Government Agency Obligations	$	—		$	91,943,341		$	—	$	91,943,341
U.S. Government Agency Obligations and Instrumentalities		—			22,937,846			—		22,937,846
U.S. Treasury Obligations		—			41,125,197			—		41,125,197
Short-Term Investments		—			29,614,028			—		29,614,028
Total Investments	$	—		$	185,620,412		$	—	$	185,620,412
Asset Derivatives
Futures Contracts	$	269,503		$	—		$	—	$	269,503
Swap Agreements		—			1,370,869			—		1,370,869
Total	$	269,503		$	1,370,869		$	—	$	1,640,372
Liability Derivatives
Futures Contracts	$	(43,014	)	$	—		$	—	$	(43,014	)
Swap Agreements		—			(4,573,454	)		—		(4,573,454	)
Total	$	(43,014	)	$	(4,573,454	)	$	—	$	(4,616,468	)

Notes to Portfolio of Investments (Unaudited) (Continued)

iShares 60/40 Allocation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Mutual Funds	$	33,493,687	$	—	$	—	$	33,493,687
Short-Term Investments		350,385		—		—		350,385
Total Investments	$	33,844,072	$	—	$	—	$	33,844,072

Notes to Portfolio of Investments (Unaudited) (Continued)

iShares 80/20 Allocation Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Mutual Funds	$	56,031,828	$	—	$	—	$	56,031,828
Short-Term Investments		2,515,515		162,731		—		2,678,246
Total Investments	$	58,547,343	$	162,731	$	—	$	58,710,074

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	245,348,730		$	—	$	245,348,730
Non-U.S. Government Agency Obligations		—			189,586,703			—		189,586,703
Sovereign Debt Obligations		—			1,265,185			—		1,265,185
U.S. Government Agency Obligations and Instrumentalities		—			190,482,521			—		190,482,521
U.S. Treasury Obligations		—			15,867,093			—		15,867,093
Short-Term Investments		—			92,210,386			—		92,210,386
Total Investments	$	—		$	734,760,618		$	—	$	734,760,618
Asset Derivatives
Futures Contracts	$	129,121		$	—		$	—	$	129,121
Swap Agreements		—			3,856,640			—		3,856,640
Total	$	129,121		$	3,856,640		$	—	$	3,985,761
Liability Derivatives
Futures Contracts	$	(3,266,256	)	$	—		$	—	$	(3,266,256	)
Swap Agreements		—			(5,647,224	)		—		(5,647,224	)
Total	$	(3,266,256	)	$	(5,647,224	)	$	—	$	(8,913,480	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	55,207,230		$	—	$	55,207,230
Non-U.S. Government Agency Obligations		—			47,439,799			—		47,439,799
U.S. Government Agency Obligations and Instrumentalities		—			2,074,998			—		2,074,998
U.S. Treasury Obligations		—			669,691			—		669,691
Short-Term Investments		709,660			19,051,368			—		19,761,028
Total Investments	$	709,660		$	124,443,086		$	—	$	125,152,746
Asset Derivatives
Futures Contracts	$	192,946		$	—		$	—	$	192,946
Swap Agreements		—			344,971			—		344,971
Total	$	192,946		$	344,971		$	—	$	537,917
Liability Derivatives
Futures Contracts	$	(234,101	)	$	—		$	—	$	(234,101	)
Swap Agreements		—			(521,373	)		—		(521,373	)
Total	$	(234,101	)	$	(521,373	)	$	—	$	(755,474	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock*
Brazil	$	2,700,925	$	—	$	—		$	2,700,925
Chile		293,325		165,991		—			459,316
China		8,746,248		2,111,055		—			10,857,303
France		—		2,420,403		—			2,420,403
Hong Kong		—		325,180		—			325,180
India		—		8,681,182		—			8,681,182
Indonesia		—		473,911		—			473,911
Italy		173,081		642,910		—			815,991
Japan		—		271,714		—			271,714
Mexico		5,170,234		—		—			5,170,234
Netherlands		224,675		—		—			224,675
Peru		431,899		—		—			431,899
Philippines		—		482,690		—			482,690
Poland		—		11,421		—			11,421
Portugal		—		475,799		—			475,799
Republic of Korea		—		2,942,784		—			2,942,784
Russia		—		—		—	+		—
South Africa		—		276,769		—			276,769
Switzerland		—		1,220,130		—			1,220,130
Taiwan		—		3,437,362		—			3,437,362
Preferred Stock
Brazil		516,838		—		—			516,838
Warrants		16,769		—		—			16,769
Rights		255		—		—			255
Short-Term Investments		3,975		2,722,236		—			2,726,211
Total Investments	$	18,278,224	$	26,661,537	$	—		$	44,939,761

* 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, 2023.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

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

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

Securities Lending

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

Each Fund expects that in connection with any securities on loan, the loan will be secured continuously by collateral consisting of cash (U.S. currency) and/or securities (U.S. Treasury and Agency obligations) adjusted daily to have value at least equal to the current market value of the securities loaned. The market value of the loaned securities is determined at the close of business of a Fund and any additional collateral is delivered to the Fund the next business day. The Funds bear the risk of loss with respect to the investment of cash collateral. As with other extensions of credit, the Funds may bear the risk of delay in recovery of the loaned securities or even loss of rights in the collateral should the Borrower of the securities fail financially. Pursuant to the Lending Agreement, the Agent has provided indemnification to the Funds in the event of default by a Borrower with respect to a loan. The Funds receive compensation for lending their securities in the form of a securities loan fee paid by the Borrower, as well as a share of the income earned on investment of the cash collateral received for the loaned securities. At September 30, 2023, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan and all of the Funds’ cash collateral was invested in the State Street Navigator Securities Lending Government Money Market Portfolio.

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

Accounting for Investment Transactions

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

Foreign Currency Translation

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

Notes to Portfolio of Investments (Unaudited) (Continued)

Foreign Securities

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

Federal Income Tax

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

Dividends and Distributions to Shareholders

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

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

3. Federal Income Tax Information

At September 30, 2023, 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 federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Blend Fund	$	659,511,660	$	54,236,876	$	(53,222,984	)	$	1,013,892
Dynamic Bond Fund		252,827,994		1,181,645		(28,520,118	)		(27,338,473	)
Equity Fund		643,468,395		136,985,920		(18,468,460	)		118,517,460
Equity Rotation Fund		49,851,663		713,698		(2,634,517	)		(1,920,819	)
High Yield Fund		56,795,358		252,161		(5,428,671	)		(5,176,510	)
Inflation-Protected and Income Fund		194,541,285		336,087		(9,256,960	)		(8,920,873	)
iShares 60/40 Allocation Fund		36,478,222		–		(2,634,150	)		(2,634,150	)
iShares 80/20 Allocation Fund		60,688,607		13,025		(1,991,558	)		(1,978,533	)
Managed Bond Fund		827,204,013		844,542		(93,287,937	)		(92,443,395	)
Short-Duration Bond Fund		134,514,248		128,973		(9,490,475	)		(9,361,502	)
Small Cap Equity Fund		86,306,367		31,792,979		(5,380,483	)		26,412,496
Strategic Emerging Markets Fund		44,540,243		3,457,198		(3,057,680	)		399,518

4. New Accounting Pronouncements

In June 2022, FASB issued Accounting Standards Update 2022-03 — Fair Value Measurement (Topic 820) — Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions ("ASU 2022-03"). ASU 2022-03 clarifies the guidance in Topic 820 to indicate that a contractual sale restriction should not be considered in the fair value of an equity security subject to such a restriction, and requires entities with investments in equity securities subject to contractual sale restrictions to disclose certain qualitative and quantitative information about such securities. ASU 2022-03 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2023, and allows for early adoption. ASU 2022-03 will only be applicable to an equity security in which the contractual arrangement that restricts its sale is executed or modified on or after the adoption date. Management is currently evaluating the impact of applying this update.

Notes to Portfolio of Investments (Unaudited) (Continued)

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

5. Coronavirus (COVID-19) Pandemic

The global pandemic outbreak of the novel coronavirus known as COVID-19 and efforts to contain its spread have produced, and may continue to produce, substantial market volatility, severe market dislocations and liquidity constraints in many markets, exchange trading suspensions and closures, higher default rates, and global business disruption, and they may result in future significant adverse effects. Such factors, and the effects of other infectious illness outbreaks, epidemics, or pandemics, may have a significant adverse effect on a Fund’s performance and have the potential to impair the ability of a Fund’s investment adviser, subadviser, or other service providers to serve the Fund and could lead to disruptions that negatively impact the Fund.

6. Russia-Ukraine War

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