MML Series Investment Fund II NPORT-P MML Blend Fund (Mar 2020 report)

MML Asset Momentum Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 24.4%
Common Stock — 24.4%
Communications — 2.2%
Internet — 0.8%
Rightmove PLC		35,000	$	211,086
Media — 0.7%
Fox Corp. Class A		8,000		189,040
Telecommunications — 0.7%
NTT DOCOMO, Inc.		5,600		176,037
				576,163
Consumer, Cyclical — 3.8%
Distribution & Wholesale — 3.8%
Pool Corp.		5,100		1,003,527
Consumer, Non-cyclical — 2.2%
Health Care – Products — 0.7%
Advanced Medical Solutions Group PLC		54,682		170,243
Health Care – Services — 0.8%
Fresenius SE & Co. KGaA		5,900		221,714
Household Products & Wares — 0.7%
Henkel AG & Co. KGaA		2,000		150,714
Portmeirion Group PLC		5,600		23,645
				174,359
				566,316
Energy — 0.9%
Oil & Gas — 0.9%
Marathon Petroleum Corp.		10,000		236,200
Financial — 6.2%
Diversified Financial Services — 6.2%
Mastercard, Inc. Class A		5,300		1,280,268
Visa, Inc. Class A		2,200		354,464
				1,634,732
				1,634,732
Industrial — 4.7%
Building Materials — 0.3%
Breedon Group PLC (a)		88,437		74,176
Electronics — 2.9%
Halma PLC		17,600		418,152
Roper Technologies, Inc.		1,100		342,991
				761,143
Hand & Machine Tools — 0.6%
Schindler Holding AG		700		153,863
Machinery – Diversified — 0.9%
Keyence Corp.		800		258,172
				1,247,354
Technology — 4.4%
Computers — 3.4%
Fortinet, Inc. (a)		8,800		890,296
Software — 1.0%
EMIS Group PLC		11,800		153,274
Nexus AG		3,400		104,538
				257,812
				1,148,108
TOTAL COMMON STOCK                                                                                                            (Cost $5,569,154)				6,412,400
TOTAL EQUITIES (Cost $5,569,154)				6,412,400

MML Asset Momentum Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Bonds & Notes — 23.0%
U.S. Treasury Obligations — 23.0%
U.S. Treasury Bonds & Notes — 23.0%
U.S. Treasury Note
1.250% 3/31/21 (b)	$	6,000,000	$	6,066,359
TOTAL U.S. TREASURY OBLIGATIONS (Cost $5,966,406)				6,066,359
TOTAL BONDS & NOTES (Cost $5,966,406)				6,066,359

	Number of Shares
Mutual Funds — 58.0%
Diversified Financial Services — 58.0%
iShares MSCI Brazil Capped Index Fund (c)		36,000	848,160
iShares MSCI India ETF (c)		6,600	159,126
iShares MSCI Mexico ETF (c)		17,000	481,950
State Street Navigator Securities Lending Prime Portfolio (d)		6,234,013	6,234,013
Vanguard Short-Term Bond ETF (c)		57,000	4,684,260
Vanguard Total Stock Market ETF (c)		22,200	2,861,802
			15,269,311
TOTAL MUTUAL FUNDS (Cost $16,016,987)			15,269,311
TOTAL LONG-TERM INVESTMENTS (Cost $27,552,547)			27,748,070

	Principal Amount
Short-Term Investments — 15.3%
Repurchase Agreement — 15.3%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (e)	$	4,027,681		4,027,681
TOTAL SHORT-TERM INVESTMENTS (Cost $4,027,681)				4,027,681
TOTAL INVESTMENTS — 120.7% (Cost $31,580,228) (f)				31,775,751
Other Assets/(Liabilities) — (20.7)%				(5,455,321	)
NET ASSETS — 100.0%			$	26,320,430

Abbreviation Legend
ETF	Exchange-Traded Fund

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets.
(a)	Non-income producing security.
(b)	A portion of this security is pledged/held as collateral for open derivatives.
(c)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $6,661,482 or 25.31% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $578,221 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)	Represents investment of security lending cash collateral. (Note 2).
(e)	Maturity value of $4,027,681. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $4,111,395.
(f)	See Note 3 for aggregate cost for federal tax purposes.

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
Nasdaq 100 E Mini Index	6/19/20		32	$	5,055,449	$	(72,249	)
S&P 500 E Mini Index	6/19/20		111		14,896,230		(634,395	)
						$	(706,644	)

MML Blend Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)
	Number of Shares		Value
Equities — 61.6%
Common Stock — 61.5%
Basic Materials — 0.9%
Chemicals — 0.6%
Air Products & Chemicals, Inc.		2,475	$	494,035
Celanese Corp.		5,200		381,628
CF Industries Holdings, Inc.		10,690		290,768
Dow, Inc.		13,006		380,295
DuPont de Nemours, Inc.		2,806		95,685
Eastman Chemical Co.		6,070		282,740
Ecolab, Inc.		2		312
Linde PLC		346		59,858
LyondellBasell Industries NV Class A		15,640		776,213
PPG Industries, Inc.		2,818		235,585
The Sherwin-Williams Co.		1,673		768,777
				3,765,896
Forest Products & Paper — 0.1%
International Paper Co.		18,987		591,065
Iron & Steel — 0.1%
Nucor Corp.		11,656		419,849
Mining — 0.1%
Freeport-McMoRan, Inc.		64		432
Newmont Corp.		16,870		763,874
				764,306
				5,541,116
Communications — 10.0%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.		22,122		358,155
Omnicom Group, Inc.		8,147		447,271
				805,426
Internet — 6.3%
Alphabet, Inc. Class A (a)		4,750		5,519,262
Alphabet, Inc. Class C (a)		5,411		6,291,965
Amazon.com, Inc. (a)		7,500		14,622,900
Booking Holdings, Inc. (a)		1,511		2,032,779
CDW Corp.		6,080		567,082
eBay, Inc.		41,777		1,255,817
Expedia Group, Inc.		1,877		105,619
F5 Networks, Inc. (a)		1,400		149,282
Facebook, Inc. Class A (a)		47,000		7,839,600
Netflix, Inc. (a)		143		53,696
NortonLifeLock, Inc.		55		1,029
TripAdvisor, Inc.		37		643
Twitter, Inc. (a)		300		7,368
VeriSign, Inc. (a)		2,991		538,649
				38,985,691
Media — 1.1%
Charter Communications, Inc. Class A (a)		2,031		886,146
Comcast Corp. Class A		93,724		3,222,231
Discovery, Inc. Class A (a) (b)		16,400		318,816
Discovery, Inc. Class C (a)		9,043		158,614
DISH Network Corp. Class A (a)		6,600		131,934
Fox Corp. Class A		14,622		345,518
Fox Corp. Class B		2,700		61,776
News Corp. Class A		66		592
ViacomCBS, Inc. Class B		20,143		282,203
The Walt Disney Co.		11,166		1,078,636
				6,486,466
Telecommunications — 2.5%
AT&T, Inc.		97,326		2,837,053
CenturyLink, Inc.		27,928		264,199
Cisco Systems, Inc.		144,142		5,666,222
Corning, Inc.		8,167		167,750
Juniper Networks, Inc.		7,289		139,512
Motorola Solutions, Inc.		2,107		280,062
Verizon Communications, Inc.		113,955		6,122,802
				15,477,600
				61,755,183
Consumer, Cyclical — 4.9%
Airlines — 0.3%
Alaska Air Group, Inc.		300		8,541
American Airlines Group, Inc.		2,200		26,818
Delta Air Lines, Inc.		23,200		661,896
Southwest Airlines Co.		27,183		967,987
United Airlines Holdings, Inc. (a)		11,700		369,135
				2,034,377
Apparel — 0.4%
Capri Holdings Ltd. (a)		2,800		30,212
Hanesbrands, Inc. (b)		34,000		267,580
NIKE, Inc. Class B		17,884		1,479,722
PVH Corp.		1,620		60,977
Ralph Lauren Corp.		2,960		197,817
Tapestry, Inc.		6,220		80,549
Under Armour, Inc. Class C (a)		1,900		15,314
VF Corp.		2,200		118,976
				2,251,147
Auto Manufacturers — 0.5%
Cummins, Inc.		5,555		751,702
Ford Motor Co.		74,313		358,932
General Motors Co.		53,400		1,109,652
PACCAR, Inc.		12,722		777,696
				2,997,982

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Auto Parts & Equipment — 0.0%
BorgWarner, Inc.		4,800	$	116,976
Distribution & Wholesale — 0.1%
Copart, Inc. (a)		4,400		301,488
Fastenal Co.		164		5,125
W.W. Grainger, Inc.		1,072		266,392
				573,005
Home Builders — 0.1%
D.R. Horton, Inc.		4,747		161,398
PulteGroup, Inc.		8,173		182,421
				343,819
Home Furnishings — 0.0%
Leggett & Platt, Inc.		86		2,295
Whirlpool Corp.		2,993		256,799
				259,094
Housewares — 0.0%
Newell Brands, Inc.		4,600		61,088
Leisure Time — 0.0%
Harley-Davidson, Inc.		3,302		62,507
Norwegian Cruise Line Holdings Ltd. (a)		1,300		14,248
Royal Caribbean Cruises Ltd.		610		19,624
				96,379
Lodging — 0.3%
Hilton Worldwide Holdings, Inc.		12,700		866,648
Las Vegas Sands Corp.		9,000		382,230
Marriott International, Inc. Class A		6,081		454,920
Wynn Resorts Ltd.		8		481
				1,704,279
Retail — 3.2%
Advance Auto Parts, Inc.		1,010		94,253
AutoZone, Inc. (a)		464		392,544
Best Buy Co., Inc.		13,192		751,944
Costco Wholesale Corp.		530		151,119
Darden Restaurants, Inc.		2,654		144,537
Dollar General Corp.		3,780		570,818
Dollar Tree, Inc. (a)		48		3,526
The Gap, Inc. (b)		10,990		77,369
Genuine Parts Co.		3,264		219,765
The Home Depot, Inc.		23,487		4,385,258
Kohl's Corp.		8,530		124,453
L Brands, Inc.		2,200		25,432
Lowe's Cos., Inc.		39,115		3,365,846
Macy's, Inc. (b)		10,351		50,823
McDonald's Corp.		3,300		545,655
Nordstrom, Inc. (b)		10,308		158,125
O'Reilly Automotive, Inc. (a)		3,743		1,126,830
Ross Stores, Inc.		10,104		878,745
Starbucks Corp.		11,254		739,838
Target Corp.		17,286		1,607,079
Tiffany & Co.		802		103,859
The TJX Cos., Inc.		25,112		1,200,605
Walgreens Boots Alliance, Inc.		10,857		496,708
Walmart, Inc.		19,862		2,256,720
Yum! Brands, Inc.		3,675		251,848
				19,723,699
Toys, Games & Hobbies — 0.0%
Hasbro, Inc.		2,791		199,696
				30,361,541
Consumer, Non-cyclical — 14.3%
Agriculture — 0.9%
Altria Group, Inc.		74,259		2,871,595
Archer-Daniels-Midland Co.		92		3,237
Philip Morris International, Inc.		31,986		2,333,699
				5,208,531
Beverages — 1.1%
Brown-Forman Corp. Class B (b)		15		833
The Coca-Cola Co.		73,030		3,231,577
Constellation Brands, Inc. Class A		542		77,701
Molson Coors Beverage Co. Class B		1,500		58,515
Monster Beverage Corp. (a)		8,400		472,584
PepsiCo, Inc.		21,770		2,614,577
				6,455,787
Biotechnology — 2.2%
Alexion Pharmaceuticals, Inc. (a)		8,440		757,828
Amgen, Inc.		23,671		4,798,822
Biogen, Inc. (a)		9,472		2,996,751
Corteva, Inc.		6		141
Gilead Sciences, Inc.		46,910		3,506,992
Illumina, Inc. (a)		20		5,462
Incyte Corp. (a)		2,900		212,367
Regeneron Pharmaceuticals, Inc. (a)		2,090		1,020,526
Vertex Pharmaceuticals, Inc. (a)		1,250		297,437
				13,596,326

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Commercial Services — 0.8%
Automatic Data Processing, Inc.		1,889	$	258,189
Cintas Corp.		2,378		411,917
Equifax, Inc.		2		239
Gartner, Inc. (a)		110		10,953
Global Payments, Inc.		2		288
H&R Block, Inc. (b)		26,163		368,375
Moody's Corp.		5,040		1,065,960
Nielsen Holdings PLC		23,400		293,436
PayPal Holdings, Inc. (a)		7		670
Quanta Services, Inc.		2,013		63,872
Robert Half International, Inc.		10,626		401,131
S&P Global, Inc.		6,358		1,558,028
United Rentals, Inc. (a)		3,220		331,338
Verisk Analytics, Inc.		2,720		379,114
				5,143,510
Cosmetics & Personal Care — 1.1%
Colgate-Palmolive Co.		20,806		1,380,686
The Estee Lauder Cos., Inc. Class A		1,570		250,164
The Procter & Gamble Co.		44,419		4,886,090
				6,516,940
Foods — 0.7%
Campbell Soup Co.		11,724		541,180
Conagra Brands, Inc.		7,774		228,089
General Mills, Inc.		19,062		1,005,902
The Hershey Co.		4,287		568,028
Hormel Foods Corp.		3,232		150,740
The J.M. Smucker Co.		845		93,795
Kellogg Co.		28		1,680
The Kraft Heinz Co.		4,958		122,661
The Kroger Co.		24,258		730,651
McCormick & Co., Inc.		91		12,850
Mondelez International, Inc. Class A		1,675		83,884
Sysco Corp.		15,134		690,564
Tyson Foods, Inc. Class A		5,401		312,556
				4,542,580
Health Care – Products — 0.6%
Abbott Laboratories		1		79
Align Technology, Inc. (a)		1,370		238,311
Baxter International, Inc.		7,561		613,878
The Cooper Cos., Inc.		1,240		341,831
Danaher Corp.		86		11,903
Dentsply Sirona, Inc.		56		2,174
Edwards Lifesciences Corp. (a)		1,750		330,085
Henry Schein, Inc. (a)		500		25,260
IDEXX Laboratories, Inc. (a)		1,830		443,299
Intuitive Surgical, Inc. (a)		8		3,962
Medtronic PLC		1,520		137,074
ResMed, Inc.		2,160		318,146
Stryker Corp.		2,780		462,842
Thermo Fisher Scientific, Inc.		2,281		646,892
Varian Medical Systems, Inc. (a)		7		719
Zimmer Biomet Holdings, Inc.		5		505
				3,576,960
Health Care – Services — 1.2%
Anthem, Inc.		5,476		1,243,271
Centene Corp. (a)		2,120		125,949
DaVita, Inc. (a)		7,630		580,338
HCA Healthcare, Inc.		9,790		879,631
Humana, Inc.		2,144		673,259
Laboratory Corp. of America Holdings (a)		2		253
Quest Diagnostics, Inc.		3,309		265,713
UnitedHealth Group, Inc.		13,984		3,487,330
Universal Health Services, Inc. Class B		50		4,954
				7,260,698
Household Products & Wares — 0.5%
Avery Dennison Corp.		1,915		195,081
Church & Dwight Co., Inc.		3,400		218,212
The Clorox Co.		4,243		735,100
Kimberly-Clark Corp.		17,005		2,174,429
				3,322,822
Pharmaceuticals — 5.2%
AbbVie, Inc.		58,722		4,474,029
Allergan PLC		1,250		221,375
AmerisourceBergen Corp.		6,507		575,870
Becton Dickinson and Co.		2		460
Bristol-Myers Squibb Co.		64,243		3,580,905
Cardinal Health, Inc.		5,978		286,585
Cigna Corp. (a)		2,803		496,636
CVS Health Corp.		9,301		551,828
Eli Lilly & Co.		39,264		5,446,702
Johnson & Johnson		49,892		6,542,338
McKesson Corp.		11,605		1,569,692
Merck & Co., Inc.		49,383		3,799,528
Mylan NV (a)		18,547		276,536
Pfizer, Inc.		114,441		3,735,354
Zoetis, Inc.		4,890		575,504
				32,133,342
				87,757,496
Energy — 1.2%
Oil & Gas — 1.2%
Apache Corp.		21		88
Cabot Oil & Gas Corp.		30,148		518,244
Chevron Corp.		9,038		654,894
Cimarex Energy Co.		1,900		31,977
ConocoPhillips		12,539		386,201
Devon Energy Corp.		6,447		44,549
Diamondback Energy, Inc.		2,460		64,452
EOG Resources, Inc.		5,478		196,770
Exxon Mobil Corp.		36,397		1,381,994
Helmerich & Payne, Inc.		60		939
Hess Corp.		3,032		100,966
HollyFrontier Corp.		13,000		318,630
Marathon Oil Corp.		7,327		24,106
Marathon Petroleum Corp.		38,100		899,922
Noble Energy, Inc.		56		338
Occidental Petroleum Corp.		629		7,284
Phillips 66		25,579		1,372,313
Pioneer Natural Resources Co.		1		70
Valero Energy Corp.		23,240		1,054,166
				7,057,903

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Oil & Gas Services — 0.0%
Baker Hughes Co.		31	$	325
Halliburton Co.		16,867		115,539
National Oilwell Varco, Inc.		1,094		10,754
Schlumberger Ltd.		4,531		61,123
TechnipFMC PLC		40		270
				188,011
Pipelines — 0.0%
Kinder Morgan, Inc.		238		3,313
The Williams Cos., Inc.		48		679
				3,992
				7,249,906
Financial — 9.2%
Banks — 3.4%
Bank of America Corp.		135,398		2,874,500
The Bank of New York Mellon Corp.		35,507		1,195,876
Citigroup, Inc.		65,551		2,761,008
Citizens Financial Group, Inc.		5,900		110,979
Comerica, Inc.		5,821		170,788
Fifth Third Bancorp		11,821		175,542
The Goldman Sachs Group, Inc.		4,840		748,216
Huntington Bancshares, Inc.		6,800		55,828
JP Morgan Chase & Co.		65,732		5,917,852
KeyCorp		32,764		339,763
M&T Bank Corp.		2,545		263,229
Morgan Stanley		56,497		1,920,898
Northern Trust Corp.		3,459		261,016
The PNC Financial Services Group, Inc.		7,688		735,895
Regions Financial Corp.		26,715		239,634
State Street Corp.		6,576		350,303
SVB Financial Group (a)		2,100		317,268
Truist Financial Corp.		14,044		433,117
US Bancorp		21,902		754,524
Wells Fargo & Co.		38,816		1,114,019
Zions Bancorp NA		2,041		54,617
				20,794,872
Diversified Financial Services — 2.8%
Alliance Data Systems Corp.		3,580		120,467
American Express Co.		5,839		499,877
Ameriprise Financial, Inc.		7,456		764,091
BlackRock, Inc.		1,450		637,956
Capital One Financial Corp.		9,452		476,570
The Charles Schwab Corp.		21,112		709,785
Discover Financial Services		17,183		612,918
E*TRADE Financial Corp.		5,561		190,853
Franklin Resources, Inc.		5,387		89,909
Intercontinental Exchange, Inc.		1,115		90,036
Invesco Ltd.		14,412		130,861
Jefferies Financial Group, Inc.		37		506
Mastercard, Inc. Class A		26,510		6,403,756
Nasdaq, Inc.		45		4,273
Raymond James Financial, Inc.		3,900		246,480
Synchrony Financial		39,200		630,728
T. Rowe Price Group, Inc.		4,706		459,541
Visa, Inc. Class A		28,692		4,622,855
The Western Union Co. (b)		21,188		384,138
				17,075,600
Insurance — 1.6%
Aflac, Inc.		14,844		508,259
The Allstate Corp.		4,235		388,477
American International Group, Inc.		11,446		277,565
Aon PLC		3,445		568,563
Assurant, Inc.		96		9,993
Berkshire Hathaway, Inc. Class B (a)		21,606		3,950,225
Chubb Ltd.		4,088		456,589
Cincinnati Financial Corp.		39		2,943
Everest Re Group Ltd.		20		3,848
Globe Life, Inc.		3,282		236,206
The Hartford Financial Services Group, Inc.		5,152		181,556
Lincoln National Corp.		6,951		182,950
Loews Corp.		783		27,272
Marsh & McLennan Cos., Inc.		1,103		95,365
MetLife, Inc.		32,190		984,048
Principal Financial Group, Inc.		8,129		254,763
The Progressive Corp.		11,614		857,578
Prudential Financial, Inc.		8,037		419,049
The Travelers Cos., Inc.		4,097		407,037
Unum Group		16,131		242,126
				10,054,412
Real Estate — 0.0%
CBRE Group, Inc. Class A (a)		8,087		304,961
Real Estate Investment Trusts (REITS) — 1.4%
Alexandria Real Estate Equities, Inc.		120		16,447
American Tower Corp.		13,019		2,834,887
Apartment Investment & Management Co. Class A		82		2,882
AvalonBay Communities, Inc.		2,081		306,261
Boston Properties, Inc.		3,793		349,828
Crown Castle International Corp.		1,450		209,380
Digital Realty Trust, Inc. (b)		280		38,895
Duke Realty Corp.		9,000		291,420
Equinix, Inc.		300		187,371
Equity Residential		756		46,653
Essex Property Trust, Inc.		180		39,643
Extra Space Storage, Inc.		4,090		391,658
Healthpeak Properties, Inc.		935		22,300
Host Hotels & Resorts, Inc.		43,337		478,441
Iron Mountain, Inc. (b)		48		1,142
Kimco Realty Corp.		15,067		145,698
The Macerich Co. (b)		6,000		33,780
Mid-America Apartment Communities, Inc.		2,190		225,636
Prologis, Inc.		12,838		1,031,790
Public Storage		3,103		616,287
Realty Income Corp.		700		34,902
Regency Centers Corp.		3,900		149,877
Simon Property Group, Inc.		15,305		839,632
SL Green Realty Corp.		2,790		120,249
UDR, Inc.		200		7,308
Ventas, Inc.		925		24,790
Vornado Realty Trust		1,373		49,716
Welltower, Inc.		1,500		68,670
Weyerhaeuser Co.		26		441
				8,565,984

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Savings & Loans — 0.0%
People's United Financial, Inc.		1,751	$	19,349
				56,815,178
Industrial — 4.3%
Aerospace & Defense — 1.0%
The Boeing Co.		72		10,738
General Dynamics Corp.		602		79,651
Howmet Aerospace, Inc.		5,408		86,852
L3 Harris Technologies, Inc.		1,161		209,119
Lockheed Martin Corp.		11,970		4,057,232
Northrop Grumman Corp.		2,658		804,178
Raytheon Co.		3,309		433,975
edeRaytheon Technologies Corp.		2,493		235,165
				5,916,910
Building Materials — 0.1%
Johnson Controls International PLC		2,565		69,153
Masco Corp.		9,825		339,650
Vulcan Materials Co.		5		540
				409,343
Electrical Components & Equipment — 0.1%
AMETEK, Inc.		2,500		180,050
Emerson Electric Co.		12,269		584,618
				764,668
Electronics — 0.8%
Agilent Technologies, Inc.		63		4,512
Allegion PLC		1,633		150,269
Amphenol Corp. Class A		4,874		355,217
FLIR Systems, Inc.		2,852		90,950
Fortive Corp.		5,878		324,407
Garmin Ltd.		2,100		157,416
Honeywell International, Inc.		13,402		1,793,053
Keysight Technologies, Inc. (a)		4,500		376,560
Mettler-Toledo International, Inc. (a)		760		524,788
PerkinElmer, Inc.		20		1,506
Roper Technologies, Inc.		663		206,730
TE Connectivity Ltd.		8,500		535,330
Waters Corp. (a)		1,540		280,357
				4,801,095
Engineering & Construction — 0.0%
Jacobs Engineering Group, Inc.		820		65,001
Environmental Controls — 0.2%
Pentair PLC		2,523		75,084
Republic Services, Inc.		337		25,295
Waste Management, Inc.		9,373		867,565
				967,944
Hand & Machine Tools — 0.0%
Snap-on, Inc.		1,171		127,428
Stanley Black & Decker, Inc.		9		900
				128,328
Machinery – Construction & Mining — 0.3%
Caterpillar, Inc.		15,845		1,838,654
Machinery – Diversified — 0.2%
Dover Corp.		1,303		109,374
Flowserve Corp.		1,870		44,675
Ingersoll Rand, Inc. (a)		344		8,531
Rockwell Automation, Inc.		6,753		1,019,095
Xylem, Inc.		55		3,582
				1,185,257
Miscellaneous - Manufacturing — 0.8%
3M Co.		14,052		1,918,238
Eaton Corp. PLC		7,366		572,265
General Electric Co.		2,586		20,533
Illinois Tool Works, Inc.		15,815		2,247,628
Parker-Hannifin Corp.		2,268		294,228
Textron, Inc.		3,372		89,931
Trane Technologies PLC		390		32,210
				5,175,033
Packaging & Containers — 0.1%
Ball Corp.		4		259
Packaging Corp. of America		5,550		481,906
Sealed Air Corp.		53		1,310
WestRock Co.		7,467		211,017
				694,492
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		1,110		202,253
Transportation — 0.7%
C.H. Robinson Worldwide, Inc.		2,520		166,824
CSX Corp.		19,307		1,106,291
Expeditors International of Washington, Inc.		126		8,407
Norfolk Southern Corp.		3		438
Union Pacific Corp.		11,252		1,586,982
United Parcel Service, Inc. Class B		17,960		1,677,823
				4,546,765
				26,695,743

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Technology — 15.0%
Computers — 5.2%
Accenture PLC Class A		15,660	$	2,556,652
Apple, Inc.		83,287		21,179,051
Cognizant Technology Solutions Corp. Class A		14,656		681,064
DXC Technology Co.		7,579		98,906
Fortinet, Inc. (a)		2,720		275,182
Hewlett Packard Enterprise Co.		50,874		493,986
HP, Inc.		44,074		765,125
International Business Machines Corp.		38,390		4,258,603
Leidos Holdings, Inc.		5,000		458,250
NetApp, Inc.		8,998		375,127
Seagate Technology PLC		8,800		429,440
Western Digital Corp.		7,147		297,458
				31,868,844
Office & Business Equipment — 0.0%
Xerox Holdings Corp.		5,736		108,640
Semiconductors — 3.7%
Analog Devices, Inc.		1,072		96,105
Applied Materials, Inc.		35,339		1,619,233
Broadcom, Inc.		7,049		1,671,318
Intel Corp.		132,123		7,150,497
KLA Corp.		5,439		781,802
Lam Research Corp.		6,193		1,486,320
Maxim Integrated Products, Inc.		6,600		320,826
Microchip Technology, Inc. (b)		21		1,424
Micron Technology, Inc. (a)		29,817		1,254,103
NVIDIA Corp.		2,256		594,682
QUALCOMM, Inc.		59,100		3,998,115
Skyworks Solutions, Inc.		5,940		530,917
Texas Instruments, Inc.		29,594		2,957,328
Xilinx, Inc.		5,996		467,328
				22,929,998
Software — 6.1%
Activision Blizzard, Inc.		200		11,896
Adobe, Inc. (a)		3,600		1,145,664
Akamai Technologies, Inc. (a)		2,026		185,359
Autodesk, Inc. (a)		7		1,093
Broadridge Financial Solutions, Inc.		720		68,277
Cadence Design Systems, Inc. (a)		10,500		693,420
Cerner Corp.		4,300		270,857
Citrix Systems, Inc.		4,937		698,832
Electronic Arts, Inc. (a)		14,107		1,413,098
Fidelity National Information Services, Inc.		540		65,686
Fiserv, Inc. (a)		502		47,685
Intuit, Inc.		6,190		1,423,700
Microsoft Corp.		158,395		24,980,475
MSCI, Inc.		1,700		491,232
Oracle Corp.		101,957		4,927,582
Paychex, Inc.		5,864		368,963
salesforce.com, Inc. (a)		4		576
Synopsys, Inc. (a)		2,630		338,718
				37,133,113
				92,040,595
Utilities — 1.7%
Electric — 1.7%
AES Corp.		48,287		656,703
Alliant Energy Corp.		5,400		260,766
Ameren Corp.		4,060		295,690
American Electric Power Co., Inc.		2,485		198,750
CenterPoint Energy, Inc.		4,131		63,824
CMS Energy Corp.		1,103		64,801
Consolidated Edison, Inc.		1,282		99,996
Dominion Energy, Inc.		6,647		479,847
DTE Energy Co.		3,020		286,809
Duke Energy Corp.		6,190		500,647
Edison International		826		45,257
Entergy Corp.		648		60,893
Evergy, Inc.		5,300		291,765
Eversource Energy		812		63,507
Exelon Corp.		22,140		814,973
FirstEnergy Corp.		19,380		776,557
NextEra Energy, Inc.		1,350		324,837
NRG Energy, Inc.		28,600		779,636
Pinnacle West Capital Corp.		1,396		105,803
PPL Corp.		41,918		1,034,536
Public Service Enterprise Group, Inc.		9,924		445,687
Sempra Energy		1,781		201,235
The Southern Co.		41,922		2,269,657
WEC Energy Group, Inc.		4,542		400,286
Xcel Energy, Inc.		2,172		130,972
				10,653,434
Gas — 0.0%
NiSource, Inc.		713		17,803
Water — 0.0%
American Water Works Co., Inc.		380		45,433
				10,716,670
TOTAL COMMON STOCK (Cost $323,817,045)				378,933,428
Preferred Stock — 0.1%
Financial — 0.1%
Insurance — 0.1%
The Allstate Corp., 3 mo. USD LIBOR + 3.165%
5.100% VRN		20,000		487,200
TOTAL PREFERRED STOCK (Cost $500,000)				487,200
TOTAL EQUITIES (Cost $324,317,045)				379,420,628

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Bonds & Notes — 37.8%
Corporate Debt — 13.0%
Aerospace & Defense — 0.0%
United Technologies Corp.
6.125% 7/15/38	$	80,000	$	114,963
Agriculture — 0.3%
BAT Capital Corp.
4.758% 9/06/49		110,000		103,857
Bunge Ltd. Finance Corp.
3.250% 8/15/26		262,000		237,621
4.350% 3/15/24		350,000		342,265
Imperial Brands Finance PLC
3.875% 7/26/29 (c)		631,000		590,081
Reynolds American, Inc.
4.450% 6/12/25		245,000		246,463
5.850% 8/15/45		220,000		236,313
				1,756,600
Airlines — 0.1%
American Airlines Group, Inc.
5.000% 6/01/22 (c)		511,000		410,078
American Airlines Pass-Through Trust, Series 2014-1, Class B,
4.375% 4/01/24		25,096		23,494
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 10/01/29		260,153		253,075
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		82,760		71,695
				758,342
Auto Manufacturers — 0.6%
Ford Motor Credit Co. LLC
3.087% 1/09/23		320,000		294,400
3.336% 3/18/21		400,000		383,920
3.810% 1/09/24		450,000		407,250
4.140% 2/15/23		465,000		430,962
4.375% 8/06/23		475,000		431,822
General Motors Co.
4.200% 10/01/27		215,000		177,654
5.150% 4/01/38		130,000		94,019
General Motors Financial Co., Inc.
3.500% 11/07/24		490,000		431,129
4.150% 6/19/23		582,000		529,386
4.200% 11/06/21		301,000		287,288
Hyundai Capital America
2.850% 11/01/22 (c)		385,000		375,963
				3,843,793
Banks — 1.7%
Associated Banc-Corp.
4.250% 1/15/25		494,000		508,747
Bank of America Corp.
3 mo. USD LIBOR + 1.060% 3.559% VRN 4/23/27		175,000		183,124
4.183% 11/25/27		255,000		263,584
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		200,000		229,998
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		100,000		108,106
4.750% 4/21/45		125,000		142,008
6.110% 1/29/37		220,000		282,637
7.750% 5/14/38		95,000		140,340
The Bank of Nova Scotia
4.500% 12/16/25		200,000		205,483
3 mo. USD LIBOR + 2.648% 4.650% VRN   (d)		715,000		546,081
Barclays Bank PLC
10.179% 6/12/21 (c)		440,000		470,054
Barclays PLC
3 mo. USD LIBOR + 1.380% 3.072% FRN 5/16/24		345,000		303,809
4.337% 1/10/28		260,000		264,299
Citigroup, Inc.
3.875% 3/26/25		387,000		392,304
8.125% 7/15/39		90,000		141,169
Credit Suisse AG
6.500% 8/08/23 (c)		350,000		355,103
Deutsche Bank AG
3.150% 1/22/21		428,000		418,134
Discover Bank 5 year USD Swap + 1.730%
4.682% VRN 8/09/28		495,000		504,014
First Republic Bank
4.375% 8/01/46		935,000		994,497
Fulton Financial Corp.
3.600% 3/16/22		230,000		231,738
The Goldman Sachs Group, Inc.
4.250% 10/21/25		100,000		103,082
5.950% 1/15/27		212,000		240,053
6.250% 2/01/41		60,000		80,756
6.750% 10/01/37		200,000		264,753
HSBC Holdings PLC
4.250% 3/14/24		200,000		205,232
ING Groep NV
3.550% 4/09/24		290,000		291,400
JP Morgan Chase & Co.
5.600% 7/15/41		195,000		259,168
Morgan Stanley
4.350% 9/08/26		775,000		820,935
5.000% 11/24/25		275,000		301,052
SVB Financial Group
3.500% 1/29/25		400,000		402,884
Truist Bank
2.250% 3/11/30		320,000		292,593
Valley National Bancorp
5.125% 9/27/23		245,000		255,710
Wells Fargo & Co.
5.375% 11/02/43		159,000		186,391
5.606% 1/15/44		110,000		131,687
				10,520,925
Beverages — 0.2%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46		825,000		898,560
Molson Coors Beverage Co.
4.200% 7/15/46		285,000		254,763
5.000% 5/01/42		60,000		58,168
				1,211,491

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Building Materials — 0.1%
Standard Industries, Inc.
5.000% 2/15/27 (c)	$	771,000	$	701,610
5.500% 2/15/23 (c)		78,000		75,270
				776,880
Chemicals — 0.4%
DuPont de Nemours, Inc.
5.319% 11/15/38		365,000		409,973
Huntsman International LLC
5.125% 11/15/22		197,000		201,925
LYB International Finance BV
5.250% 7/15/43		175,000		178,420
Syngenta Finance NV
3.698% 4/24/20 (c)		410,000		409,212
4.441% 4/24/23 (c)		400,000		376,815
Yara International ASA
4.750% 6/01/28 (c)		745,000		751,331
				2,327,676
Commercial Services — 0.2%
The ADT Security Corp.
6.250% 10/15/21		1,122,000		1,096,755
ERAC USA Finance LLC
6.700% 6/01/34 (c)		78,000		101,072
				1,197,827
Computers — 0.3%
Dell International LLC/EMC Corp.
6.020% 6/15/26 (c)		616,000		635,762
Genpact Luxembourg Sarl
3.375% 12/01/24		770,000		773,162
3.700% STEP 4/01/22		360,000		366,471
				1,775,395
Diversified Financial Services — 0.9%
Aircastle Ltd.
4.400% 9/25/23		190,000		181,700
5.000% 4/01/23		525,000		512,559
Ally Financial, Inc.
4.125% 2/13/22		375,000		360,821
Antares Holdings LP
6.000% 8/15/23 (c)		495,000		509,851
Ares Finance Co. LLC
4.000% 10/08/24 (c)		355,000		350,735
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (c)		310,000		243,112
Brookfield Finance, Inc.
4.850% 3/29/29		433,000		459,381
GE Capital International Funding Co. Unlimited Co.
4.418% 11/15/35		200,000		213,416
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (c)		325,000		209,300
Lazard Group LLC
3.625% 3/01/27		184,000		184,434
3.750% 2/13/25		160,000		157,797
4.500% 9/19/28		285,000		285,739
LeasePlan Corp. NV
2.875% 10/24/24 (c)		345,000		337,954
Legg Mason, Inc.
5.625% 1/15/44		175,000		185,880
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (c)		250,000		216,861
5.250% 8/15/22 (c)		1,375,000		1,242,472
				5,652,012
Electric — 0.7%
Avangrid, Inc.
3.800% 6/01/29		367,000		375,263
The Cleveland Electric Illuminating Co.
3.500% 4/01/28 (c)		155,000		145,800
CMS Energy Corp.
4.700% 3/31/43		115,000		124,407
4.875% 3/01/44		390,000		421,126
Entergy Louisiana LLC
4.950% 1/15/45		165,000		174,409
IPALCO Enterprises, Inc.
3.450% 7/15/20		615,000		614,907
3.700% 9/01/24		170,000		176,185
Metropolitan Edison Co.
4.300% 1/15/29 (c)		328,000		342,303
Nevada Power Co.
6.650% 4/01/36		135,000		178,430
Oncor Electric Delivery Co.
7.500% 9/01/38		40,000		60,947
Pennsylvania Electric Co.
4.150% 4/15/25 (c)		295,000		292,279
Potomac Electric Power Co.
4.150% 3/15/43		350,000		382,555
Puget Energy, Inc.
3.650% 5/15/25		350,000		342,208
Southwestern Electric Power Co.
6.200% 3/15/40		180,000		237,687
Xcel Energy, Inc.
6.500% 7/01/36		390,000		508,944
				4,377,450
Electronics — 0.0%
Ingram Micro, Inc.
5.450% STEP 12/15/24		203,000		165,738
Foods — 0.2%
Ingredion, Inc.
3.200% 10/01/26		155,000		166,137
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (c)		174,000		179,655
Kraft Heinz Foods Co.
3.950% 7/15/25		560,000		557,305
Mars, Inc.
3.950% 4/01/49 (c)		415,000		449,642
				1,352,739

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Forest Products & Paper — 0.0%
Fibria Overseas Finance Ltd.
4.000% 1/14/25	$	250,000	$	230,877
Gas — 0.1%
NiSource, Inc.
4.800% 2/15/44		385,000		388,528
5.800% 2/01/42		175,000		194,597
				583,125
Health Care – Services — 0.1%
Advocate Health & Hospitals Corp.
3.829% 8/15/28		165,000		181,042
Humana, Inc.
4.800% 3/15/47		125,000		139,291
				320,333
Home Builders — 0.0%
Lennar Corp.
4.750% 5/30/25		200,000		191,000
Housewares — 0.1%
Newell Brands, Inc.
4.100% STEP 4/01/23		528,000		535,893
Insurance — 1.6%
Allstate Corp. 3 mo. USD LIBOR + 2.938%
5.750% VRN 8/15/53		990,000		881,100
American International Group, Inc.
4.200% 4/01/28		210,000		216,387
4.500% 7/16/44		200,000		202,811
4.750% 4/01/48		75,000		79,152
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		625,000		547,000
AmTrust Financial Services, Inc.
6.125% 8/15/23		775,000		765,461
Arch Capital Group US, Inc.
5.144% 11/01/43		170,000		209,350
Athene Global Funding
2.500% 1/14/25 (c)		630,000		593,433
Athene Holding Ltd.
4.125% 1/12/28		1,255,000		1,133,394
AXIS Specialty Finance LLC
3.900% 7/15/29		155,000		160,436
5 year CMT + 3.186% 4.900% VRN 1/15/40		300,000		258,000
AXIS Specialty Finance PLC
4.000% 12/06/27		665,000		697,002
Brown & Brown, Inc.
4.200% 9/15/24		246,000		259,445
CNO Financial Group, Inc.
5.250% 5/30/25		590,000		613,969
Enstar Group Ltd.
4.500% 3/10/22		370,000		369,048
Markel Corp.
3.350% 9/17/29		130,000		122,597
The Progressive Corp. 3 mo. USD LIBOR + 2.539%
5.375% VRN   (d)		375,000		317,445
Prudential Financial, Inc.
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		225,000		211,433
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48  (b)		480,000		444,000
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		125,000		121,250
USF&G Capital I
8.500% 12/15/45 (c)		150,000		222,633
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084%
4.700% VRN 1/23/48		180,000		147,600
Willis North America, Inc.
2.950% 9/15/29		180,000		170,908
4.500% 9/15/28		480,000		527,363
XLIT Ltd.
4.450% 3/31/25		483,000		498,811
				9,770,028
Internet — 0.1%
Amazon.com, Inc.
4.050% 8/22/47		325,000		423,452
Investment Companies — 0.5%
Ares Capital Corp.
3.500% 2/10/23		710,000		634,527
BlackRock TCP Capital Corp.
3.900% 8/23/24		850,000		782,270
4.125% 8/11/22		470,000		482,145
Icahn Enterprises LP/Icahn Enterprises Finance Corp.
6.250% 2/01/22		550,000		551,375
TPG Specialty Lending, Inc.
3.875% 11/01/24		805,000		710,127
				3,160,444
Iron & Steel — 0.1%
Vale Overseas Ltd.
6.250% 8/10/26		275,000		297,006
6.875% 11/21/36		230,000		255,417
				552,423
Machinery – Diversified — 0.1%
CNH Industrial Capital LLC
3.875% 10/15/21		700,000		696,344
Media — 0.4%
CCO Holdings LLC/CCO Holdings Capital Corp.
5.125% 5/01/27 (c)		200,000		200,520
Charter Communications Operating LLC/Charter Communications Operating Capital
6.484% 10/23/45		225,000		271,422
Comcast Corp.
3.400% 7/15/46		220,000		237,709
3.450% 2/01/50		315,000		345,116
3.969% 11/01/47		135,000		153,536
4.750% 3/01/44		190,000		241,289
Discovery Communications LLC
3.950% 3/20/28		349,000		342,133
5.000% 9/20/37		160,000		155,406
Grupo Televisa SAB
6.625% 3/18/25		495,000		544,828
Time Warner Cable, Inc.
6.750% 6/15/39		110,000		124,563
				2,616,522

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Mining — 0.3%
Glencore Finance Canada Ltd.
5.550% STEP 10/25/42  (c)	$	149,000	$	119,657
Glencore Funding LLC
3.875% 10/27/27 (c)		160,000		142,694
4.625% 4/29/24 (c)		600,000		548,700
Kinross Gold Corp.
4.500% 7/15/27		166,000		156,241
5.125% 9/01/21		650,000		651,625
Teck Resources Ltd.
6.000% 8/15/40		200,000		171,456
				1,790,373
Miscellaneous - Manufacturing — 0.0%
Carlisle Cos., Inc.
2.750% 3/01/30		265,000		231,312
General Electric Co.
4.125% 10/09/42		42,000		39,650
				270,962
Oil & Gas — 0.6%
Cenovus Energy, Inc.
4.250% 4/15/27		275,000		134,664
6.750% 11/15/39		100,000		48,432
Diamondback Energy, Inc.
3.250% 12/01/26		250,000		176,391
EQT Corp.
3.000% 10/01/22		340,000		283,900
3.900% 10/01/27		1,090,000		751,773
6.125% STEP 2/01/25		395,000		304,189
Marathon Petroleum Corp.
4.500% 4/01/48		85,000		61,277
4.750% 9/15/44		100,000		76,029
6.500% 3/01/41		170,000		157,628
Newfield Exploration Co.
5.625% 7/01/24		250,000		134,161
5.750% 1/30/22		417,000		283,907
Occidental Petroleum Corp.
6.450% 9/15/36		250,000		119,748
6.600% 3/15/46		257,000		119,940
Ovintiv, Inc.
6.500% 2/01/38		80,000		34,739
Patterson-UTI Energy, Inc.
3.950% 2/01/28		410,000		160,778
Petroleos Mexicanos
5.350% 2/12/28		190,000		132,527
6.375% 1/23/45		80,000		50,592
6.500% 3/13/27		60,000		44,261
6.625% 6/15/38		37,000		24,235
Saudi Arabian Oil Co.
4.250% 4/16/39 (c)		495,000		490,094
				3,589,265
Oil & Gas Services — 0.1%
National Oilwell Varco, Inc.
3.600% 12/01/29		285,000		212,757
3.950% 12/01/42		366,000		229,259
				442,016
Packaging & Containers — 0.1%
Amcor Finance USA, Inc.
3.625% 4/28/26 (c)		715,000		743,006
Pharmaceuticals — 0.7%
AbbVie, Inc.
4.050% 11/21/39 (c)		240,000		246,866
4.700% 5/14/45		490,000		550,363
Allergan Funding SCS
3.800% 3/15/25		300,000		307,153
Becton Dickinson and Co.
4.685% 12/15/44		225,000		236,430
Bristol-Myers Squibb Co.
4.350% 11/15/47 (c)		200,000		251,854
Cigna Corp.
4.800% 7/15/46 (c)		195,000		230,627
CVS Health Corp.
4.300% 3/25/28		250,000		267,411
5.050% 3/25/48		230,000		262,782
6.125% 9/15/39		175,000		219,429
CVS Pass-Through Trust
5.926% 1/10/34 (c)		249,429		284,340
McKesson Corp.
4.883% 3/15/44		60,000		67,391
6.000% 3/01/41		125,000		159,032
Mylan NV
3.950% 6/15/26		495,000		488,485
5.250% 6/15/46		320,000		305,370
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		232,000		221,602
				4,099,135
Pipelines — 0.6%
Cheniere Energy Partners LP
4.500% 10/01/29 (c)		255,000		221,850
Energy Transfer Operating LP
4.200% 4/15/27		440,000		354,609
5.875% 1/15/24		200,000		188,864
6.125% 12/15/45		200,000		178,564
3 mo. USD LIBOR + 4.028% 6.250% VRN   (d)		540,000		270,000
5 year CMT + 5.134% 6.750% VRN   (d)		240,000		146,400
EnLink Midstream Partners LP
4.150% 6/01/25		621,000		300,999
4.850% 7/15/26		149,000		73,263
Enterprise Products Operating LLC
3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		225,000		154,125
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		195,000		136,500
EQM Midstream Partners LP
4.750% 7/15/23		500,000		361,850
MPLX LP
4.500% 4/15/38		195,000		152,265
6.250% 10/15/22 (c)		97,000		87,321
3 mo. USD LIBOR + 4.652% 6.875% VRN   (d)		300,000		183,000
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN   (d)		585,000		292,500
Plains All American Pipeline LP/PAA Finance Corp.
4.500% 12/15/26		268,000		207,893
4.700% 6/15/44		275,000		180,843
Sunoco Logistics Partners Operations LP
5.300% 4/01/44		75,000		58,978
Western Midstream Operating LP
4.500% 3/01/28		105,000		50,388
				3,600,212

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Private Equity — 0.2%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50  (c)	$	185,000	$	166,656
Carlyle Finance Subsidiary LLC
3.500% 9/19/29 (c)		245,000		219,327
Hercules Capital, Inc.
4.625% 10/23/22		470,000		447,710
KKR Group Finance Co. VI LLC
3.750% 7/01/29 (c)		280,000		279,119
				1,112,812
Real Estate Investment Trusts (REITS) — 0.8%
Alexandria Real Estate Equities, Inc.
2.750% 12/15/29		185,000		162,091
American Tower Trust #1
3.652% 3/15/48 (c)		310,000		301,181
Crown Castle International Corp.
5.200% 2/15/49		146,000		161,770
Healthcare Trust of America Holdings LP
3.500% 8/01/26		495,000		489,425
SBA Tower Trust
2.836% 1/15/25 (c)		1,300,000		1,255,246
Service Properties Trust
4.500% 6/15/23		170,000		127,701
4.950% 10/01/29		265,000		229,492
Spirit Realty LP
3.200% 1/15/27		325,000		295,293
3.400% 1/15/30		120,000		103,108
4.000% 7/15/29		185,000		180,779
Store Capital Corp.
4.625% 3/15/29		250,000		236,966
Tanger Properties LP
3.875% 12/01/23		322,000		335,493
UDR, Inc.
3.200% 1/15/30		180,000		177,127
Vereit Operating Partnership LP
3.100% 12/15/29		635,000		548,311
4.625% 11/01/25		460,000		429,290
				5,033,273
Retail — 0.1%
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (c)		445,000		432,544
Semiconductors — 0.1%
KLA Corp.
3.300% 3/01/50		285,000		267,010
Microchip Technology, Inc.
3.922% 6/01/21		165,000		160,774
				427,784
Software — 0.1%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		280,000		264,850
Microsoft Corp.
4.450% 11/03/45		530,000		696,941
				961,791
Telecommunications — 0.4%
AT&T, Inc.
4.750% 5/15/46		670,000		740,967
5.250% 3/01/37		470,000		548,344
6.250% 3/29/41		25,000		30,819
Cisco Systems, Inc.
5.500% 1/15/40		55,000		78,293
Crown Castle Towers LLC
4.241% 7/15/48 (c)		250,000		252,758
Qwest Corp
6.750% 12/01/21		162,000		167,881
Telefonica Emisiones SAU
4.665% 3/06/38		180,000		187,565
Verizon Communications, Inc.
4.000% 3/22/50		30,000		35,479
6.550% 9/15/43		149,000		186,416
				2,228,522
Transportation — 0.1%
Autoridad del Canal de Panama
4.950% 7/29/35 (c)		210,000		240,450
CSX Corp.
4.750% 11/15/48		155,000		178,438
Pacific National Finance Pty Ltd.
4.625% 9/23/20 (c)		105,000		106,193
				525,081
Trucking & Leasing — 0.0%
DAE Funding LLC
4.000% 8/01/20 (c)		173,000		169,540
TOTAL CORPORATE DEBT (Cost $84,894,011)				80,338,588

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Municipal Obligations — 0.3%
JobsOhio Beverage System Series B, Revenue Bonds,
4.532% 1/01/35	$	325,000	$	389,119
Orange County Local Transportation Authority BAB, Revenue Bonds,
6.908% 2/15/41		230,000		337,944
State of California BAB
General Obligation, 7.550% 4/01/39		475,000		770,782
General Obligation, 7.600% 11/01/40		105,000		174,733
				1,672,578
TOTAL MUNICIPAL OBLIGATIONS (Cost $1,455,225)				1,672,578
Non-U.S. Government Agency Obligations — 12.1%
Automobile ABS — 0.5%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (c)		305,000		300,635
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (c)		359,000		350,691
Hertz Vehicle Financing LP
Series 2019-3A, Class B, 3.030% 12/26/25  (c)		493,000		489,211
Series 2019-3A, Class C, 3.430% 12/26/25  (c)		500,000		499,389
Series 2018-1A, Class B, 3.600% 2/25/24  (c)		650,000		660,476
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B
3.950% 11/14/28 (c)		424,000		418,034
Santander Revolving Auto Loan Trust
Series 2019-A, Class B, 2.800% 1/26/32  (c)		204,000		200,449
Series 2019-A, Class C, 3.000% 1/26/32  (c)		126,000		123,798
Series 2019-A, Class D, 3.450% 1/26/32  (c)		263,000		258,375
				3,301,058
Commercial MBS — 1.9%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.112% VRN 7/05/40  (c) (e)		710,000		825,445
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
2.055% FRN 9/15/34  (c)		130,000		106,956
BANK
Series 2019-BN24, Class B, 3.455% VRN 11/15/62  (e)		409,000		355,571
Series 2019-BN24, Class C, 3.635% VRN 11/15/62  (e)		397,000		309,255
Series 2019-BN17, Class B, 4.128% VRN 4/15/52  (e)		150,000		139,123
Series 2019-BN16, Class AS, 4.267% 2/15/52		176,250		183,726
Series 2019-BN16, Class B, 4.438% VRN 2/15/52  (e)		136,855		130,086
Series 2018-BN14, Class C, 4.602% VRN 9/15/60  (e)		210,000		185,984
BBCMS Mortgage Trust
Series 2018-CHRS, Class B, 4.267% VRN 8/05/38  (c) (e)		350,000		310,838
Series 2018-CHRS, Class C, 4.267% VRN 8/05/38  (c) (e)		280,000		236,720
Series 2018-CHRS, Class D, 4.267% VRN 8/05/38  (c) (e)		210,000		165,529
BHMS Mortgage Trust
Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.955% FRN 7/15/35  (c)		970,000		809,866
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 2.205% FRN 7/15/35  (c)		850,000		679,908
BX Commercial Mortgage Trust
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 2.405% FRN 11/15/35  (c)		294,000		268,274
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 2.505% FRN 10/15/36  (c)		373,562		326,857
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.705% FRN 10/15/36  (c)		452,860		389,446
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
2.455% FRN 12/15/37  (c)		224,629		194,447
Century Plaza Towers
Series 2019-CPT, Class E, 2.997% VRN 11/13/39  (c) (e)		338,000		283,894
Series 2019-CPT, Class D, 2.997% VRN 11/13/39  (c) (e)		225,000		205,687
Citigroup Commercial Mortgage Trust, Series 2019-GC41, Class C
3.502% 8/10/56		241,000		168,866
Commercial Mortgage Pass-Through Certificates
Series 2012-CR4, Class B, 3.703% 10/15/45  (c)		195,000		177,554
Series 2015-CR23, Class C, 4.304% VRN 5/10/48  (e)		140,000		128,667
Series 2014-UBS5, Class B, 4.514% VRN 9/10/47  (e)		290,000		285,064
DBUBS Mortgage Trust, Series 2011-LC1A, Class B,
5.471% VRN 11/10/46  (c) (e)		110,000		110,258
GCCFC Commercial Mortgage Trust, Series 2006-GG7, Class AM,
5.513% VRN 7/10/38  (e)		68,241		67,927
GS Mortgage Securities Trust
Series 2017-GS6, Class B, 3.869% 5/10/50		440,000		410,670
Series 2012-GC6, Class AS, 4.948% 1/10/45  (c)		100,000		102,600
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39  (c) (e)		500,000		459,132
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2016-JP2, Class AS
3.056% 8/15/49		490,000		474,383
JPMBB Commercial Mortgage Securities Trust, Series 2015-C27, Class B
3.898% 2/15/48		500,000		445,315
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.505% FRN 5/15/36  (c)		326,000		254,438
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/06/30  (c)		205,000		202,148
Series 2020-ABC, Class B, 3.477% VRN 2/06/30  (c) (e)		227,000		210,311
MKT Mortgage Trust
Series 2020-525M, Class E, 2.941% VRN 2/12/40  (c) (e)		213,000		177,213
Series 2020-525M, Class D, 2.941% VRN 2/12/40  (c) (e)		109,000		95,826
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		500,000		520,693
Series 2018-H3, Class B, 4.620% VRN 7/15/51  (e)		120,000		115,980
Series 2011-C2, Class B, 5.200% VRN 6/15/44  (c) (e)		250,000		248,755
Velocity Commercial Capital Loan Trust, Series 2016-2, Class AFX,
2.997% VRN 10/25/46  (e)		5,390		5,383
Wells Fargo Commercial Mortgage Trust
Series 2019-C49, Class AS, 4.244% 3/15/52		291,000		308,709
Series 2018-C45, Class AS, 4.405% VRN 6/15/51  (e)		240,000		251,053
Series 2018-C45, Class B, 4.556% 6/15/51		60,000		57,927
WF-RBS Commercial Mortgage Trust, Series 2012-C8, Class B
4.311% 8/15/45		190,000		189,552
				11,576,036

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Other ABS — 5.8%
321 Henderson Receivables I LLC, Series 2005-1A, Class A1, 1 mo. USD LIBOR + .230%
0.935% FRN 11/15/40 (c)	$	44,808	$	43,481
321 Henderson Receivables LLC, Series 2015-1A, Class A
3.260% 9/15/72 (c)		43,088		44,869
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40  (c)		358,499		256,956
Series 2019-1, Class A, 3.844% 5/15/39  (c)		467,895		352,514
Series 2017-1A, Class A, 3.967% 5/16/42  (c)		290,401		228,164
AASET US Ltd., Series 2018-2A, Class A
4.454% 11/18/38 (c)		298,145		236,736
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (c)		381,165		380,098
Arbys Funding LLC, Series 2015-1A, Class A2
4.969% 10/30/45 (c)		306,400		294,582
Ares CLO Ltd., Series 2019-54A, Class C, 3 mo. USD LIBOR + 2.850%
4.696% FRN 10/15/32  (c)		500,000		418,205
Ascentium Equipment Receivables Trust
Series 2019-2A, Class E, 3.780% 5/10/27 (c)		827,000		820,462
Series 2018-2A, Class D, 4.150% 7/10/24  (c)		488,000		489,750
Series 2019-1A, Class E, 4.310% 4/12/27  (c)		295,000		297,447
Assurant CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
4.069% FRN 10/20/31  (c)		310,000		251,990
Atlas Senior Loan Fund VII Ltd., Series 2016-7A, Class A1R, 3 mo. USD LIBOR + 1.280%
2.918% FRN 11/27/31  (c)		960,000		902,893
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
3.556% FRN 1/23/31  (c)		250,000		224,624
Benefit Street Partners CLO V-B Ltd., Series 2018-5BA, Class A1A, 3 mo. USD LIBOR + 1.090%
2.909% FRN 4/20/31  (c)		260,000		244,258
BlueMountain CLO XXV Ltd., Series 2019-25A, Class B, 3 mo. USD LIBOR + 1.800%
3.631% FRN 7/15/32  (c)		500,000		447,615
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (c)		88,135		88,305
CAL Funding II Ltd., Series 2018-2A, Class A
4.340% 9/25/43 (c)		246,500		242,322
Capital Automotive REIT
Series 2014-1A, Class A, 3.660% 10/15/44  (c)		152,514		149,566
Series 2017-1A, Class A2, 4.180% 4/15/47  (c)		132,085		131,474
Carlyle Global Market Strategies CLO Ltd., Series 2018-4A, Class A2, 3 mo. USD LIBOR + 1.800%
3.619% FRN 1/20/31  (c)		720,000		646,250
CARS-DB4 LP, Series 2020-1A, Class A3
3.250% 2/15/50 (c)		119,159		115,435
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (c)		347,184		242,901
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (c)		676,871		491,895
CBAM Ltd., Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100%
3.931% FRN 1/15/31  (c)		250,000		227,279
CIFC Funding Ltd., Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180%
3.016% FRN 11/16/30  (c)		340,000		321,890
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
3.019% FRN 10/20/30  (c)		480,000		453,507
CLI Funding LLC, Series 2019-1A, Class A
3.710% 5/18/44 (c)		392,316		385,463
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460%
1.407% FRN 9/25/34		2,551		2,100
Crestline Denali CLO XIV Ltd., Series 2016-1A, Class A1R, 3 mo. USD LIBOR + 1.280%
3.086% FRN 10/23/31  (c)		250,000		228,966
Cronos Containers Program Ltd., Series 2014-2A, Class A
3.270% 11/18/29 (c)		122,222		119,461
DB Master Finance LLC
Series 2019-1A, Class A2II, 4.021% 5/20/49  (c)		415,858		385,208
Series 2019-1A, Class A23, 4.352% 5/20/49  (c)		376,158		335,342
Diamond Resorts Owner Trust
Series 2019-1A, Class A, 2.890% 2/20/32  (c)		609,483		611,421
Series 2016-1, Class A, 3.080% 11/20/28  (c)		152,069		149,963
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49  (c)		259,350		230,776
Series 2018-1A, Class A2I, 4.116% 7/25/48  (c)		305,350		293,245
Series 2017-1A, Class A23, 4.118% 7/25/47  (c)		107,525		97,598
Series 2015-1A, Class A2II, 4.474% 10/25/45  (c)		521,100		484,344
Eaton Vance CLO Ltd., Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750%
3.581% FRN 10/15/30  (c)		700,000		620,089
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
3.269% FRN 4/20/31  (c)		450,000		420,538
Elmwood CLO III Ltd., Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950%
3.807% FRN 10/15/32  (c)		250,000		215,144
Falcon Aerospace Ltd., Series 2019-1, Class A
3.597% 9/15/39 (c)		566,324		395,955
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (c)		92,094		91,939
First Franklin Mortgage Loan Trust, Series 2004-FFH4, Class M6, 1 mo. USD LIBOR + 1.725%
2.672% FRN 1/25/35		420,000		365,255
Flatiron CLO Ltd., Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900%
3.795% FRN 11/16/32  (c)		250,000		216,323
Galaxy XX CLO Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + 1.000%
2.819% FRN 4/20/31  (c)		500,000		469,653
Global SC Finance SRL, Series 2014-1A, Class A1
3.190% 7/17/29 (c)		108,333		92,286
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54  (c)		740,932		702,051
Series 2016-1A, Class A, 3.230% 10/15/52  (c)		268,620		261,386
Series 2017-2A, Class A, 3.260% 10/15/53  (c)		329,336		326,694
Series 2017-1A, Class A, 3.740% 10/15/52  (c)		200,517		201,801
Series 2018-1A, Class A, 3.930% VRN 10/15/53  (c) (e)		388,487		395,316
Helios Issuer LLC, Series 2017-1A, Class A
4.940% 9/20/49 (c)		215,121		201,887
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42  (c)		137,672		139,638
Series 2017-3A, Class A1, 3.190% 9/20/48  (c)		167,911		164,914
Series 2016-4A, Class A1, 3.570% 9/20/47  (c)		145,525		150,555
Series 2018-1A, Class A2, 4.670% 9/20/48  (c)		319,157		331,553
Highbridge Loan Management Ltd.
Series 12A-18, Class B, 3 mo. USD LIBOR + 1.850% 3.669% FRN 7/18/31  (c)		250,000		207,652
Series 13A-18, Class C, 3 mo. USD LIBOR + 2.150% 3.981% FRN 10/15/30  (c)		350,000		292,710

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Horizon Aircraft Finance Ltd.
Series 2019-2, Class A, 3.425% 11/15/39  (c)	$	533,976	$	373,596
Series 2019-1, Class A, 3.721% 7/15/39  (c)		315,923		220,999
J.G. Wentworth LLC
Series 2018-2A, Class A, 3.960% 10/15/75  (c)		279,240		291,825
Series 2017-1A, Class B, 5.430% 8/15/62  (c)		1,100,000		1,259,724
KDAC Aviation Finance Ltd., Series 2017-1A, Class A
4.212% 12/15/42 (c)		340,486		260,823
KKR Financial CLO Ltd.
Series 24, Class A1, 3 mo. USD LIBOR + 1.360% 3.179% FRN 4/20/32  (c)		300,000		280,854
Series 26, Class B1, 3 mo. USD LIBOR + 2.050% 3.881% FRN 7/15/32  (c)		250,000		217,743
KREF Ltd., Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.000%
2.800% FRN 6/15/36  (c)		210,000		142,806
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (c)		415,000		290,147
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (c)		478,887		334,785
Madison Park Funding Ltd.
Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 3.431% FRN 7/15/30  (c)		430,000		387,165
Series 2018-31A, Class B, 3 mo. USD LIBOR + 1.700% 3.506% FRN 1/23/31  (c)		250,000		225,186
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 4.019% FRN 10/18/30  (c)		550,000		465,272
Mosaic Solar Loans LLC
Series 2017-2A, Class A, 3.820% 6/22/43  (c)		107,778		106,841
Series 2017-1A, Class A, 4.450% 6/20/42  (c)		48,709		47,614
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
3.069% FRN 10/20/30  (c)		300,000		277,599
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (c)		380,000		372,073
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 3.266% FRN 10/22/32  (c)		250,000		235,046
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 4.586% FRN 10/22/32  (c)		250,000		211,995
OHA Credit Partners Ltd., Series 2015-11A, Class CR, 3 mo. USD LIBOR + 2.150%
3.969% FRN 1/20/32  (c)		300,000		253,216
OneMain Financial Issuance Trust, Series 2019-2A, Class A
3.140% 10/14/36 (c)		1,810,000		1,782,695
Oxford Finance Funding Trust
Series 2020-1A, Class A2, 3.101% 2/15/28  (c)		353,000		351,288
Series 2016-1A, Class A, 3.968% 6/17/24  (c)		45,263		45,152
Palmer Square CLO Ltd., Series 2015-1A, Class A2R2, 3 mo. USD LIBOR + 1.650%
3.346% FRN 5/21/29  (c)		500,000		470,562
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (c)		339,768		237,528
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (c)		527,678		480,815
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.797% FRN 2/25/23  (c)		200,000		183,434
Sierra Receivables Funding LLC
Series 2015-3A, Class B, 3.080% 9/20/32  (c)		13,266		13,114
Series 2018-2A, Class C, 3.940% 6/20/35  (c)		124,241		123,548
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
3.992% FRN 8/18/31  (c)		290,000		232,622
Store Master Funding I-VII
Series 2019-1, Class A2, 3.650% 11/20/49  (c)		662,424		594,972
Series 2018-1A, Class A2, 4.290% 10/20/48  (c)		252,390		250,622
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (c)		58,308		57,874
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (c)		111,569		99,763
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (c)		335,838		342,123
Taco Bell Funding LLC
Series 2018-1A, Class A2II, 4.940% 11/25/48  (c)		237,000		237,051
Series 2016-1A, Class A23, 4.970% 5/25/46  (c)		797,450		719,564
TAL Advantage VI LLC, Series 2017-1A, Class A
4.500% 4/20/42 (c)		288,439		291,567
Textainer Marine Containers V Ltd., Series 2017-2A, Class A
3.520% 6/20/42 (c)		427,230		428,955
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A
3.960% 4/20/44 (c)		113,053		108,112
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49  (c)		731,000		650,287
Series 2019-1A, Class A, 3.820% 4/17/49  (c)		851,242		792,167
Series 2018-1A, Class A2, 4.620% 6/17/48  (c)		410,000		380,741
Triton Container Finance LLC
Series 2017-1A, Class A, 3.520% 6/20/42  (c)		123,672		123,970
Series 2018-2A, Class A, 4.190% 6/22/43  (c)		387,750		384,972
Voya CLO Ltd., Series 2015-3A, Class A3R, 3 mo. USD LIBOR + 1.700%
3.519% FRN 10/20/31  (c)		300,000		256,630
WAVE LLC, Series 2019-1A, Class A
3.597% 9/15/44 (c)		916,085		600,450
WAVE Trust, Series 2017-1A, Class A
3.844% 11/15/42 (c)		556,595		421,635
Welk Resorts LLC, Series 2015-AA, Class A
2.790% 6/16/31 (c)		47,331		46,532
Wendy's Funding LLC, Series 2015-1A, Class A23
4.497% 6/15/45 (c)		405,875		380,544
				35,977,292

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Student Loans ABS — 3.5%
Access Group Inc.
Series 2003-A, Class A3, 3 mo. CMT + 1.200% 1.220% FRN 7/01/38	$	7,452	$	7,445
Series 2004-A, Class A3, 28 day ARS,FRN 1.699% 7/01/39		150,000		147,605
CIT Education Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .210%
0.951% FRN 6/15/43		640,597		568,281
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48  (c)		531,000		506,793
Series 2019-A, Class C, 4.460% 12/28/48  (c)		270,000		254,976
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS
FRN 1/25/47		130,000		99,237
DRB Prime Student Loan Trust, Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900%
2.847% FRN 10/25/44  (c)		222,569		219,838
ECMC Group Student Loan Trust
Series 2018-2A, Class A, 1 mo. USD LIBOR + .800% 1.747% FRN 9/25/68  (c)		422,539		367,214
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 2.147% FRN 12/27/66  (c)		293,154		259,615
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 2.297% FRN 7/26/66  (c)		418,575		365,895
EdLinc Student Loan Funding Trust
Series 2017-A, Class A, PRIME - 1.150% 3.600% FRN 12/01/47  (c)		347,899		344,204
Series 2012-1, Class B, 1 mo. USD LIBOR + 4.240% 5.187% FRN 11/26/40  (c)		270,000		289,600
Goal Capital Funding Trust, Series 2006-1, Class B, 3 mo. USD LIBOR + .450%
2.129% FRN 8/25/42		123,585		107,298
KnowledgeWorks Foundation, Series 2010-1, Class A, 3 mo. USD LIBOR + .950%
2.629% FRN 2/25/42		102,317		95,208
Laurel Road Prime Student Loan Trust
Series 2017-B, Class BFX, 3.020% 8/25/42  (c)		95,891		91,862
Series 2018-B, Class BFX, 3.720% 5/26/43  (c)		85,079		83,887
Navient Private Education Loan Trust, Series 2018-BA, Class A2B, 1 mo. USD LIBOR + .720%
1.425% FRN 12/15/59  (c)		150,000		142,532
Navient Private Education Refi Loan Trust
Series 2019-A, Class A2A, 3.420% 1/15/43  (c)		253,000		253,195
Series 2019-A, Class B, 3.900% 1/15/43  (c)		284,000		287,832
Series 2018-CA, Class B, 4.220% 6/16/42  (c)		250,000		251,603
Navient Student Loan Trust
Series 2016-1A, Class A, 1 mo. USD LIBOR + .700% 1.647% FRN 2/25/70  (c)		368,819		339,107
Series 2018-2A, Class A3, 1 mo. USD LIBOR + .750% 1.697% FRN 3/25/67  (c)		550,000		514,387
Series 2018-3A, Class A3, 1 mo. USD LIBOR + .800% 1.747% FRN 3/25/67  (c)		750,000		734,964
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.847% FRN 12/27/67  (c)		850,000		790,964
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 2.097% FRN 3/25/66  (c)		762,507		668,304
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 2.197% FRN 6/25/65  (c)		350,020		320,125
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 2.247% FRN 3/25/66  (c)		1,100,000		1,020,612
Series 2018-4A, Class B, 1 mo. USD LIBOR + 1.300% 2.247% FRN 6/27/67  (c)		750,000		703,956
Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/48		220,000		201,507
Series 2014-8, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 7/26/49		155,000		144,401
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 10/25/58		150,000		123,024
Series 2019-BA, Class B, 4.040% 12/15/59  (c)		750,000		783,433
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B
3.600% 12/26/40 (c)		73,678		73,692
Nelnet Student Loan Trust
Series 2006-3, Class B, 3 mo. USD LIBOR + 0.250% 1.466% FRN 6/25/41		138,901		120,918
Series 2005-4, Class A4R2, 28 day ARS 1.612% FRN 3/22/32		200,000		189,145
Series 2018-3A, Class A3, 1 mo. USD LIBOR + .750% 1.697% FRN 9/27/66  (c)		600,000		583,984
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/54  (c)		150,000		139,917
Series 2019-5, Class A, 2.530% 10/25/67  (c)		1,546,899		1,483,103
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		1,799		899,500
Series 2002-7, Class A11, 28 day ARS 1.403% FRN 3/15/28		10,000		10,000
Series 2005-4, Class B, 3 mo. USD LIBOR + .180% 1.974% FRN 7/25/55		249,205		215,820
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 2.004% FRN 10/25/40		318,225		284,176
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 2.084% FRN 1/25/44		344,696		305,179
Series 2004-1 Class B, 3 mo. USD LIBOR + .500% 2.294% FRN 7/25/39		305,798		274,469
Series 2003-14, Class A7, 3 mo. USD LIBOR + 0.600% 2.394% FRN 10/25/65  (c)		300,000		266,250
Series 2002-7, Class B, 28 day ARS 5.281% FRN 12/15/39		550,000		511,763
SMB Private Education Loan Trust
Series 2019-A, Class A2B, 1 mo. USD LIBOR + 0.870% 1.575% FRN 7/15/36  (c)		126,000		110,930
Series 2019-B, Class A2B, 1 mo. USD LIBOR + 1.000% 1.705% FRN 6/15/37  (c)		1,200,000		1,044,075
Series 2017-A, Class B, 3.500% 6/17/41  (c)		300,000		297,608
Series 2017-B, Class B, 3.500% 12/16/41  (c)		150,000		148,858
SoFi Professional Loan Program LLC
Series 2015-A, Class RC, 0.000% 3/25/33  (c)		100		82,500
Series 2017-D, Class R1, 0.000% 9/25/40  (c)		1,000,000		467,370
Series 2018-A, Class R1, 0.000% 2/25/42  (c)		1,000,000		702,500
Series 2018-D, Class R1, 0.000% 2/25/48  (c)		968,900		334,270
Series 2019-A, Class R1, 0.000% 6/15/48  (c)		1,661,200		507,103
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 2.147% FRN 6/25/33  (c)		67,572		64,659
Series 2019-C, Class BFX, 3.050% 11/16/48  (c)		646,000		631,243
Series 2017-D, Class BFX, 3.610% 9/25/40  (c)		500,000		465,395
South Carolina Student Loan Corp., Series 2010-1, Class A3, 3 mo. USD LIBOR + 1.050%
2.844% FRN 10/27/36		170,000		169,111
				21,472,442

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
WL Collateral CMO — 0.4%
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.722% VRN 2/25/34  (e)	$	18,860	$	16,812
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33  (e)		4,026		3,744
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A1, 2.976% VRN 12/25/57  (c) (e)		189,542		182,207
Series 2018-1A, Class A3, 3.202% VRN 12/25/57  (c) (e)		54,155		51,583
Series 2019-1A, Class A3, 3.948% VRN 1/25/59  (c) (e)		192,699		183,283
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
4.304% VRN 8/25/34  (e)		5,758		5,566
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.885% VRN 8/25/34  (e)		36,122		31,047
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47  (c) (e)		396,963		395,480
Merrill Lynch Mortgage Investors, Inc.
Series 2004-A1, Class IA, 3.250% VRN 2/25/34  (e)		1,980		1,772
Series 2003-A4, Class IA, 4.678% VRN 7/25/33  (e)		2,038		1,808
PSMC Trust, Series 2018-2, Class A1,
3.500% VRN 6/25/48  (c) (e)		475,053		467,005
Sequoia Mortgage Trust
Series 2018-CH2, Class A3, 4.000% VRN 6/25/48  (c) (e)		343,265		341,684
Series 2018-CH4, Class A2, 4.000% VRN 10/25/48  (c) (e)		175,404		178,146
Series 2019-1, Class A1, 4.000% VRN 2/25/49  (c) (e)		64,251		62,792
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A,
3.854% VRN 3/25/34  (e)		20,811		18,705
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400%
3.366% FRN 4/25/44		50,791		45,481
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1,
4.000% VRN 11/25/48  (c) (e)		257,786		258,571
				2,245,686
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $80,896,437)				74,572,514
Sovereign Debt Obligations — 0.3%
Colombia Government International Bond
6.125% 1/18/41		620,000		712,615
Mexico Government International Bond
4.750% 3/08/44		824,000		829,364
6.750% 9/27/34		160,000		210,402
				1,752,381
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,630,907)				1,752,381
U.S. Government Agency Obligations and Instrumentalities — 10.8%
Collateralized Mortgage Obligations — 0.1%
Federal Home Loan Mortgage Corp.
Series 2617, Class Z, 5.500% 5/15/33		150,955		174,139
Series 2693, Class Z, 5.500% 10/15/33		273,932		307,802
				481,941

MML Blend Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pass-Through Securities — 10.6%
Federal Home Loan Mortgage Corp.
Pool #SB8013 2.500% 9/01/34	$	1,489,599	$	1,546,201
Pool #SB8020 2.500% 12/01/34		1,284,990		1,333,818
Pool #ZA5946 4.500% 11/01/48		1,216,272		1,307,756
Pool #ZA6368 4.500% 2/01/49		795,036		854,910
Pool #C55867 7.500% 2/01/30		28,665		32,130
Pool #C01079 7.500% 10/01/30		3,952		4,606
Pool #C01135 7.500% 2/01/31		16,758		19,454
Pool #C00470 8.000% 8/01/26		9,937		11,162
Pool #G00924 8.000% 3/01/28		9,410		10,570
Federal National Mortgage Association
Pool #MA3797 2.500% 10/01/34		2,855,118		2,963,608
Pool #MA3029 3.000% 6/01/32		795,782		835,539
Pool #MA3090 3.000% 8/01/32		337,806		354,683
Pool #AS1304 3.500% 12/01/28		174,256		184,178
Pool #AV1897 3.500% 12/01/28		28,442		30,097
Pool #AV2325 3.500% 12/01/28		93,387		98,705
Pool #BF0196 3.500% 2/01/41		225,621		242,391
Pool #MA1356 3.500% 2/01/43		1,309,757		1,405,062
Pool #CA1073 3.500% 1/01/48		2,702,071		2,860,690
Pool #BJ0686 4.000% 4/01/48		625,348		668,103
Pool #CA1951 4.000% 7/01/48		551,807		589,016
Pool #CA2039 4.000% 7/01/48		639,940		682,992
Pool #888586 1 year CMT + 2.196% 4.328% FRN 10/01/34		51,108		53,598
Pool #725692 1 year CMT + 2.138% 4.355% FRN 10/01/33		24,667		25,869
Pool #CA1952 4.500% 6/01/48		366,433		394,544
Pool #CA1909 4.500% 6/01/48		1,455,227		1,568,230
Pool #BK7877 4.500% 7/01/48		218,393		235,147
Pool #MA3522 4.500% 11/01/48		930,328		999,955
Pool #MA3537 4.500% 12/01/48		857,587		921,769
Pool #MA3564 4.500% 1/01/49		787,746		846,702
Pool #BN5241 4.500% 2/01/49		3,603,724		3,873,432
Pool #AD6437 5.000% 6/01/40		63,347		70,094
Pool #AD6996 5.000% 7/01/40		429,889		475,674
Pool #AL8173 5.000% 2/01/44		171,211		188,215
Pool #564594 7.000% 1/01/31		8,775		9,958
Pool #572844 7.000% 4/01/31		19,941		22,992
Pool #253795 7.000% 5/01/31		32,764		37,604
Pool #499386 7.500% 9/01/29		1,054		1,219
Pool #522769 7.500% 12/01/29		57		66
Pool #521006 7.500% 12/01/29		408		476
Pool #252981 7.500% 1/01/30		5,424		6,278
Pool #530520 7.500% 3/01/30		9,485		10,872
Pool #524317 7.500% 3/01/30		935		1,093
Pool #253183 7.500% 4/01/30		1,834		2,124
Pool #253265 7.500% 5/01/30		1,034		1,194
Pool #536949 8.000% 5/01/30		1,295		1,514
Pool #535351 8.000% 6/01/30		2,012		2,333
Pool #253481 8.000% 10/01/30		1,406		1,639
Pool #190317 8.000% 8/01/31		598		694
Pool #602008 8.000% 8/01/31		2,034		2,360
Government National Mortgage Association I
Pool #337539 7.000% 7/15/23		194		205
Pool #363066 7.000% 8/15/23		2,416		2,557
Pool #354674 7.000% 10/15/23		2,056		2,182
Pool #352021 7.000% 11/15/23		1,238		1,312
Government National Mortgage Association II TBA
Pool #304 3.500% 10/01/48  (f)		22,115,000		23,319,230
Pool #1235 4.000% 10/01/48  (f)		9,375,000		9,959,473
Uniform Mortgage Backed Securities TBA
Pool #1058 3.500% 8/01/48  (f)		5,475,000		5,788,102
Pool #20567 4.500% 9/01/48  (f)		575,000		618,215
				65,482,592
Whole Loans — 0.1%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes, Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050%
2.997% FRN 7/25/49  (c)		377,105		316,268
Federal National Mortgage Association Connecticut Avenue Securities Trust, Series 2019-R01, Class 2M2, 1 mo. USD LIBOR + 2.450%
3.397% FRN 7/25/31 (c)		530,470		437,865
				754,133
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $65,285,069)				66,718,666
U.S. Treasury Obligations — 1.3%
U.S. Treasury Bonds & Notes — 1.3%
U.S. Treasury Bond
2.250% 8/15/49 (g)		2,140,000		2,595,864
3.500% 2/15/39 (g)		720,000		1,022,809
U.S. Treasury Note
1.500% 1/15/23		400,000		413,486
1.625% 8/15/29		4,000,000		4,334,862
				8,367,021
TOTAL U.S. TREASURY OBLIGATIONS (Cost $7,604,864)				8,367,021
TOTAL BONDS & NOTES (Cost $241,766,513)				233,421,748
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $607,842)				369,054

MML Blend Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Rights — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Bristol-Myers Squibb Co., Expires 03/31/21 (a)		25,576	$	97,189
TOTAL RIGHTS (Cost $54,477)				97,189
Mutual Funds — 0.1%
Diversified Financial Services — 0.1%
State Street Navigator Securities Lending Prime Portfolio (h)		610,776		610,776
TOTAL MUTUAL FUNDS (Cost $610,776)				610,776
TOTAL LONG-TERM INVESTMENTS (Cost $567,356,653)				613,919,395

	Principal Amount
Short-Term Investments — 7.0%
Commercial Paper — 6.0%
Avangrid, Inc.
1.318% 4/03/20 (c)	$	3,000,000		2,999,356
Boeing Co.
2.092% 6/10/20 (c)		3,000,000		2,976,629
CenterPoint Energy, Inc.
1.788% 4/06/20 (c)		1,000,000		999,518
Daimler Finance North America LLC
2.840% 4/07/20 (c)		2,000,000		1,998,911
Ecolab, Inc.
1.524% 4/20/20 (c)		2,000,000		1,996,436
Entergy Corp.
1.811% 5/04/20 (c)		2,000,000		1,996,897
1.834% 5/01/20 (c)		1,000,000		998,594
General Electric Co.
1.844% 5/20/20		2,000,000		1,990,833
1.854% 5/18/20		1,000,000		995,600
Harley-Davidson Funding Corp.
2.028% 4/02/20 (c)		2,000,000		1,999,819
2.282% 4/02/20 (c)		1,000,000		999,910
HP, Inc.
1.830% 4/06/20 (c)		3,000,000		2,998,573
NiSource, Inc.
1.809% 4/08/20 (c)		1,000,000		999,365
Parker-Hannifin Corp.
4.482% 5/01/20 (c)		3,000,000		2,996,634
Reckitt Benckiser Treasury Services PLC
2.526% 4/01/20 (c)		1,000,000		999,997
Sempra Energy Holdings
1.788% 4/01/20 (c)		3,000,000		2,999,795
Suncor Energy, Inc.
1.813% 5/13/20 (c)		3,000,000		2,988,175
ViacomCBS, Inc.
1.523% 4/15/20 (c)		3,000,000		2,995,937
				36,930,979
Repurchase Agreement — 1.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (i)		6,003,093		6,003,093
TOTAL SHORT-TERM INVESTMENTS (Cost $42,955,841)				42,934,072
TOTAL INVESTMENTS — 106.6% (Cost $610,312,494) (j)				656,853,467
Other Assets/(Liabilities) — (6.6)%				(40,911,865	)
NET ASSETS — 100.0%			$	615,941,602

Abbreviation Legend

ABS	Asset-Backed Security
ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
FRN	Floating Rate Note
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
REIT	Real Estate Investment Trust
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note
WL	Whole Loan

MML Blend Fund —  Portfolio of Investments (Continued)

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $1,848,828 or 0.30% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,311,379 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)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2020, the aggregate market value of these securities amounted to $117,149,806 or 19.02% of net assets.

(d)	Security is perpetual and has no stated maturity date.
(e)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at March 31, 2020.
(f)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(g)	A portion of this security is pledged/held as collateral for open derivatives.
(h)	Represents investment of security lending cash collateral. (Note 2).
(i)	Maturity value of $6,003,093. Collateralized by U.S. Government Agency obligations with rates ranging from 1.750% - 1.875%, maturity dates ranging from 7/15/22 - 7/31/22, and an aggregate market value, including accrued interest, of $6,125,849.
(j)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund				Received by Fund
Description	Counterparty	Expiration Date	Rate		Frequency		Rate		Frequency		Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33		3-Month USD LIBOR BBA		Quarterly		2.61%		Semi-Annually	USD	748,250	$	129,896	$	35,916	$	93,980
Put
10Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33		3.11%		Semi-Annually		3-Month USD LIBOR BBA		Quarterly	USD	11,940,000	$	239,158	$	571,926	$	(332,768	)
													$	369,054	$	607,842	$	(238,788	)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Ultra 10 Year	6/19/20		6	$	934,082		$	2,106
U.S. Treasury Ultra Bond	6/19/20		83		16,175,475			2,240,150
U.S. Treasury Note 2 Year	6/30/20		175		37,998,421			568,571
U.S. Treasury Note 5 Year	6/30/20		67		8,260,511			138,567
							$	2,949,394
Short
90 Day Eurodollar	6/15/20		3	$	(731,072	)	$	(14,991	)
U.S. Treasury Long Bond	6/19/20		26		(4,309,298	)		(346,327	)
90 Day Eurodollar	9/14/20		3		(731,391	)		(15,947	)
90 Day Eurodollar	12/14/20		2		(487,568	)		(10,732	)
90 Day Eurodollar	3/15/21		2		(487,743	)		(10,832	)
90 Day Eurodollar	9/13/21		4		(975,637	)		(21,313	)
90 Day Eurodollar	3/14/22		4		(975,337	)		(21,213	)
90 Day Eurodollar	9/19/22		3		(731,203	)		(15,647	)
90 Day Eurodollar	3/13/23		3		(730,753	)		(15,497	)
90 Day Eurodollar	12/18/23		4		(973,436	)		(20,514	)
90 Day Eurodollar	12/16/24		10		(2,430,591	)		(50,409	)
							$	(543,422	)

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 34†		1.000%	Quarterly	6/20/25	USD	1,100,000	$	3,820	$	4,784	$	(964	)
CDX.NA.IG Series 34†		1.000%	Quarterly	6/20/25	USD	1,000,000		6,656		3,551		3,105
							$	10,476	$	8,335	$	2,141

† 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 Dynamic Bond Fund — Portfolio of Investments

March 31, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 95.8%
Bank Loans — 3.0%
Advertising — 0.0%
Clear Channel Outdoor Holdings, Inc., Term Loan B, 1 mo. LIBOR + 3.500% 4.489% VRN 8/21/26	$	9,950	$	8,358
Terrier Media Buyer, Inc., Term Loan B,   0.000% VRN 12/17/26 (a)		59,850		52,818
				61,176
Aerospace & Defense — 0.1%
TransDigm, Inc., 2020 Term Loan F, 1 mo. LIBOR + 2.250% 3.239% VRN 12/09/25		171,309		155,462
WP CPP Holdings LLC, 2018 Term Loan, 1 mo. LIBOR + 3.750% 5.530% VRN 4/30/25		99,747		74,811
				230,273
Airlines — 0.1%
American Airlines, Inc., 2017 Incremental Term Loan, 1 mo. LIBOR + 2.000% 2.705% VRN 12/14/23		204,853		160,810
Kestrel Bidco Inc., Term Loan B, 1 mo. LIBOR + 3.000% 4.000% VRN 12/11/26		94,763		72,019
				232,829
Auto Parts & Equipment — 0.0%
Panther BF Aggregator 2 LP, USD Term Loan B, 1 mo. LIBOR + 3.500% 4.441% VRN 4/30/26		39,800		36,218
Biotechnology — 0.0%
Aldevron LLC, 2019 Term Loan B, 3 mo. LIBOR + 4.250% 5.700% VRN 10/12/26		100,000		93,000
Chemicals — 0.1%
Axalta Coating Systems US Holdings, Inc., USD Term Loan B3, 3 mo. LIBOR + 1.750% 3.200% VRN 6/01/24		276,572		258,595
GrafTech Finance, Inc., 2018 Term Loan B, 1 mo. LIBOR + 3.500% 4.500% VRN 2/12/25		44,562		38,323
				296,918
Commercial Services — 0.3%
AlixPartners LLP, 2017 Term Loan B, 1 mo. LIBOR + 2.500% 3.500% VRN 4/04/24		194,000		184,785
Allied Universal Holdco LLC, 2019 Term Loan B, 1 mo. LIBOR + 4.250% 5.239% VRN 7/10/26		129,675		119,301
Parexel International Corp., Term Loan B, 1 mo. LIBOR + 2.750% 3.739% VRN 9/27/24		100,000		84,875
Prime Security Services Borrower LLC, 2019 Term Loan B1,   0.000% VRN 9/23/26 (a)		64,837		57,900
Refinitiv US Holding, Inc., 2018 USD Term Loan, 1 mo. LIBOR + 3.250% 4.239% VRN 10/01/25		264,331		252,655
Team Health Holdings, Inc., 1st Lien Term Loan, 1 mo. LIBOR + 2.750% 3.750% VRN 2/06/24		24,936		15,585
Trans Union LLC, 2019 Term Loan B5, 1 mo. LIBOR + 1.750% 2.739% VRN 11/16/26		191,755		183,030
				898,131
Computers — 0.1%
Flexential Intermediate Corp., 2017 1st Lien Term Loan, 3 mo. LIBOR + 3.500% 4.950% VRN 8/01/24		29,923		20,946
Surf Holdings, LLC, USD Term Loan, 3 mo. LIBOR + 3.500% 4.814% VRN 3/05/27		130,000		115,050
Tempo Acquisition LLC, Term Loan, 1 mo. LIBOR + 2.750% 3.739% VRN 5/01/24		155,946		138,793
				274,789
Distribution & Wholesale — 0.1%
American Tire Distributors Holdings, Inc. 2015 Term Loan, 1 mo. LIBOR + 7.500%, 8.500% VRN 4/30/20		26,504		17,493
2015 Term Loan, 3 mo. LIBOR + 7.500% 8.950% VRN 6/30/20		3,346		2,208
HD Supply, Inc., Term Loan B5, 1 mo. LIBOR + 1.750% 2.739% VRN 10/17/23		321,734		298,408
				318,109
Diversified Financial Services — 0.1%
Blackhawk Network Holdings, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.000% 3.989% VRN 6/15/25		126,022		101,717
Deerfield Dakota Holding LLC 2020 USD Term Loan B, 0.000% VRN 3/05/27 (a)		100,000		84,000
2018 Term Loan B, 1 mo. LIBOR + 3.250% 4.250% VRN 2/13/25		39,797		39,001
RPI Intermediate Finance Trust, 2020 Term Loan B1, 3 mo. LIBOR + 1.750% 2.739% VRN 2/11/27		54,313		49,968
				274,686
Electric — 0.1%
Calpine Corp., Term Loan B9, 1 mo. LIBOR + 2.250% 3.240% VRN 4/05/26		313,881		297,403
Electronics — 0.0%
Compass Power Generation LLC, 2018 Term Loan B, 1 mo. LIBOR + 3.500% 4.500% VRN 12/20/24		54,854		48,957
Vertafore, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 4.239% VRN 7/02/25		59,585		52,191
				101,148

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Engineering & Construction — 0.0%
Brand Energy & Infrastructure Services, Inc. 2017 Term Loan, 3 mo. LIBOR + 4.250% 5.700% VRN 6/30/20	$	192	$	153
2017 Term Loan, 1 mo. LIBOR + 4.250% 6.056% VRN 4/23/20		13,251		10,532
2017 Term Loan, 1 week LIBOR + 4.250% 6.124% VRN 4/07/20		11,493		9,135
				19,820
Environmental Controls — 0.1%
Filtration Group Corp., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.000% 3.989% VRN 3/29/25		202,459		174,874
Foods — 0.0%
Froneri International Ltd., 2020 USD Term Loan, 1 mo. LIBOR + 2.250% 3.239% VRN 1/29/27		60,000		56,850
Hearthside Food Solutions LLC, 2018 Term Loan B, 1 mo. LIBOR + 3.688% 4.677% VRN 5/23/25		49,810		41,342
United Natural Foods, Inc., Term Loan B, 1 mo. LIBOR + 4.250% 5.239% VRN 10/22/25		29,924		25,436
				123,628
Health Care – Products — 0.1%
Athenahealth, Inc., 2019 Term Loan B, 3 mo. LIBOR + 4.500% 5.284% VRN 2/11/26		159,597		148,425
Sotera Health Holdings, LLC, 2019 Term Loan, 1 mo. LIBOR + 4.500% 5.500% VRN 12/11/26		105,000		90,924
				239,349
Health Care – Services — 0.1%
Air Methods Corp., 2017 Term Loan B, 3 mo. LIBOR + 3.500% 4.950% VRN 4/22/24		54,859		38,158
Envision Healthcare Corp., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.750% 4.739% VRN 10/10/25		44,886		22,667
Gentiva Health Services, Inc., 2020 Term Loan, 1 mo. LIBOR + 3.250% 4.250% VRN 7/02/25		199,590		186,617
Global Medical Response, Inc., 2018 Term Loan B1, 2 mo. LIBOR + 3.250% 4.932% VRN 4/28/22		59,847		55,209
RegionalCare Hospital Partners Holdings, Inc., 2018 Term Loan B, 1 mo. LIBOR + 3.750% 4.739% VRN 11/17/25		54,846		50,630
				353,281
Holding Company – Diversified — 0.0%
Travelport Finance (Luxembourg) S.a.r.l., 2019 Term Loan, 3 mo. LIBOR + 5.000% 6.072% VRN 5/29/26		34,825		22,305
Household Products — 0.0%
Diamond (BC) B.V., USD Term Loan, 3 mo. LIBOR + 3.000% 4.777% VRN 9/06/24		74,720		55,293
Kronos Acquisition Holdings, Inc., 2015 Term Loan B, 1 mo. LIBOR + 4.000% 5.000% VRN 5/15/23		50,000		44,510
				99,803
Insurance — 0.1%
Acrisure LLC, 2020 Term Loan B, 3 mo. LIBOR + 3.500% 5.207% VRN 2/15/27		124,364		109,440
AssuredPartners, Inc., 2020 Term Loan B, 1 mo. LIBOR + 3.500% 4.489% VRN 2/12/27		178,680		155,005
Asurion LLC, 2017 2nd Lien Term Loan, 1 mo. LIBOR + 6.500% 7.489% VRN 8/04/25		50,000		45,563
Sedgwick Claims Management Services, Inc., 2019 Term Loan B, 1 mo. LIBOR + 4.000% 4.989% VRN 9/03/26		34,738		31,133
				341,141
Internet — 0.0%
Getty Images, Inc., 2019 USD Term Loan B, 1 mo. LIBOR + 4.500% 5.500% VRN 2/19/26		34,538		27,285
ION Trading Technologies S.a.r.l., USD Incremental Term Loan B, 3 mo. LIBOR + 4.000% 5.072% VRN 11/21/24		19,898		16,250
Uber Technologies, Inc. 2018 Term Loan, 1 mo. LIBOR + 4.000% 5.000% VRN 4/23/20		74,741		68,762
2018 Term Loan, 3 mo. LIBOR + 3.000% 6.250% VRN 6/30/20		187		172
Web.com Group, Inc., 2018 Term Loan B, 0.000% VRN 10/10/25 (a)		40,000		32,600
				145,069
Investment Companies — 0.1%
RPI 2019 Intermediate Finance Trust, 2020 Term Loan B1, 1 mo. LIBOR + 1.750% 2.739% VRN 2/11/27		54,863		50,474
Solenis Holdings LLC 2018 1st Lien Term Loan, 3 mo. LIBOR + 2.750% 5.186% VRN 10/04/23		33,330		26,220
2018 1st Lien Term Loan, 3 mo. LIBOR + 2.750% 5.277% VRN 10/04/23		41,670		32,780
UFC Holdings LLC, 2019 Term Loan, 1 mo. LIBOR + 3.250% 4.250% VRN 4/29/26		198,777		172,936
				282,410
Leisure Time — 0.0%
ClubCorp Holdings, Inc., 2017 Term Loan B, 3 mo. LIBOR + 2.750% 4.200% VRN 9/18/24		34,910		21,732
Equinox Holdings, Inc., 2017 1st Lien Term Loan, 6 mo. LIBOR + 3.000% 4.072% VRN 3/08/24		49,314		35,784
				57,516

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Lodging — 0.1%
Caesars Resort Collection LLC, 2017 1st Lien Term Loan B, 1 mo. LIBOR + 2.750% 3.739% VRN 12/23/24	$	159,186	$	127,985
Hilton Worldwide Finance LLC, 2019 Term Loan B2, 1 mo. LIBOR + 1.750% 2.697% VRN 6/22/26		100,000		94,500
				222,485
Machinery - Diversified — 0.0%
Titan Acquisition Ltd., 2018 Term Loan B, 3 mo. LIBOR + 3.000% 4.450% VRN 3/28/25		39,898		32,517
Media — 0.2%
Cengage Learning, Inc., 2016 Term Loan B, 1 mo. LIBOR + 4.250% 5.250% VRN 6/07/23		74,690		60,187
CSC Holdings LLC, 2019 Term Loan B5, 1 mo. LIBOR + 2.500% 3.112% VRN 4/15/27		204,230		194,698
E.W. Scripps Co.(The), 2019 Term Loan B2, 1 mo. LIBOR + 2.500% 3.489% VRN 5/01/26		308,602		291,629
Radiate Holdco, LLC, 1st Lien Term Loan, 1 mo. LIBOR + 3.000% 3.989% VRN 2/01/24		99,743		91,432
				637,946
Packaging & Containers — 0.0%
Charter NEX US, Inc., Incremental Term Loan, 0.000% VRN 5/16/24 (a)		49,290		42,636
Flex Acquisition Co., Inc., 1st Lien Term Loan, 3 mo. LIBOR + 3.000% 4.898% VRN 12/29/23		75,000		67,875
Klockner-Pentaplast of America, Inc., USD 2017 Term Loan B2, 1 mo. LIBOR + 4.250% 5.250% VRN 6/30/22		29,923		20,626
				131,137
Pipelines — 0.0%
Blackstone CQP Holdco LP, Term Loan B, 3 mo. LIBOR + 3.500% 4.616% VRN 9/30/24		79,799		62,084
Buckeye Partners LP, 2019 Term Loan B, 1 mo. LIBOR + 2.750% 4.265% VRN 11/01/26		70,000		63,840
				125,924
Retail — 0.1%
EG America LLC, 2018 USD Term Loan, 6 mo. LIBOR + 4.000% 5.072% VRN 2/07/25		24,750		17,944
IRB Holding Corp 2020 Term Loan B, 1 mo. LIBOR + 4.000% 4.989% VRN 4/30/20		272		209
2020 Term Loan B, 2 mo. LIBOR + 4.000% 5.613% VRN 5/29/20		108,716		83,508
PetSmart, Inc., Consenting Term Loan, 2 mo. LIBOR + 4.000% 5.000% VRN 3/11/22		197,577		188,958
				290,619
Software — 0.7%
Almonde, Inc. USD 1st Lien Term Loan, 3 mo. LIBOR + 3.500% 5.277% VRN 6/13/24		149,596		127,157
USD 2nd Lien Term Loan, 3 mo. LIBOR + 7.250% 9.027% VRN 6/13/25		20,000		14,840
Ascend Learning LLC, 2017 Term Loan B, 1 mo. LIBOR + 3.000% 4.000% VRN 7/12/24		159,058		140,965
Camelot U.S. Acquisition 1 Co., Term Loan B, 0.000% VRN 10/31/26 (a)		154,613		145,336
Castle US Holding Corp., USD Term Loan B, 1 mo. LIBOR + 3.750% 5.200% VRN 1/29/27		160,000		126,901
Cvent, Inc., 1st Lien Term Loan, 1 mo. LIBOR + 3.750% 4.739% VRN 11/29/24		99,746		70,487
Dun & Bradstreet Corp. (The), Term Loan, 0.000% VRN 2/06/26 (a)		155,000		138,919
Emerald TopCo, Inc., Term Loan, 1 mo. LIBOR + 3.500% 4.489% VRN 7/24/26		104,737		95,310
Greeneden U.S. Holdings II, LLC, 2018 USD Term Loan B, 0.000% VRN 12/01/23 (a)		154,605		143,782
Hyland Software, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 4.239% VRN 7/01/24		159,091		147,159
Kronos, Inc., 2017 Term Loan B, 0.000% VRN 11/01/23 (a)		129,669		117,702
Mitchell International, Inc., 2017 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 4.239% VRN 11/29/24		149,618		123,685
Project Alpha Intermediate Holding, Inc., 2017 Term Loan B, 1 mo. LIBOR + 3.500% 5.380% VRN 4/26/24		99,489		89,540
Solera LLC, USD Term Loan B, 0.000% VRN 3/03/23 (a)		199,481		186,015
Sophia, L.P., 2017 Term Loan B, 3 mo. LIBOR + 3.250% 4.700% VRN 9/30/22		199,597		189,118
Tibco Software, Inc., 2020 Term Loan B, 1 mo. LIBOR + 3.750% 4.740% VRN 6/30/26		129,962		122,165
VS Buyer, LLC, Term Loan B, 0.000% VRN 2/28/27 (a)		130,000		124,150
				2,103,231
Telecommunications — 0.3%
Altice France S.A., 2018 Term Loan B13, 1 mo. LIBOR + 4.000% 4.705% VRN 8/14/26		100,000		94,750
Avaya, Inc., 2018 Term Loan B, 1 mo. LIBOR + 4.250% 4.955% VRN 12/15/24		70,000		59,325
Intelsat Jackson Holdings S.A., 2017 Term Loan B3, 1 mo. LIBOR + 3.750% 5.682% VRN 11/27/23		155,000		141,244
MLN US HoldCo LLC, 2018 1st Lien Term Loan, 1 mo. LIBOR + 4.500% 6.015% VRN 11/30/25		19,899		13,645
Nexstar Broadcasting, Inc., 2019 Term Loan B4, 1 mo. LIBOR + 2.750% 4.331% VRN 9/18/26		196,160		181,841
Sprint Communications, Inc., 1st Lien Term Loan B, 1 mo. LIBOR + 2.500% 3.500% VRN 2/02/24		158,824		157,633
Virgin Media Bristol LLC, USD Term Loan N, 1 mo. LIBOR + 2.500% 3.205% VRN 1/31/28		100,000		92,000
Zayo Group Holdings, Inc., USD Term Loan, 1 mo. LIBOR + 3.000% 3.989% VRN 4/30/20		130,000		122,200
				862,638

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Transportation — 0.1%
Genesee & Wyoming, Inc., Term Loan, 3 mo. LIBOR + 2.000% 3.450% VRN 12/30/26	$	75,000	$	71,485
PODS LLC, 2018 1st Lien Term Loan, 1 mo. LIBOR + 2.750% 3.750% VRN 12/06/24		104,732		92,687
				164,172
TOTAL BANK LOANS (Cost $10,658,235)				9,544,545
Corporate Debt — 24.2%
Advertising — 0.1%
The Interpublic Group of Cos., Inc. 5.400% 10/01/48		300,000		322,619
Aerospace & Defense — 0.1%
Bombardier, Inc. 6.000% 10/15/22 (b)		90,000		67,500
TransDigm, Inc. 5.500% 11/15/27 (b)		100,000		89,750
6.250% 3/15/26 (b)		150,000		149,438
6.375% 6/15/26		60,000		57,450
Triumph Group, Inc. 7.750% 8/15/25 (c)		65,000		47,125
				411,263
Agriculture — 0.4%
Altria Group, Inc. 4.800% 2/14/29		475,000		494,360
BAT Capital Corp. 3.462% 9/06/29		695,000		642,908
Imperial Brands Finance PLC 3.500% 7/26/26 (b)		265,000		244,587
				1,381,855
Airlines — 0.2%
Delta Air Lines, Inc. 3.800% 4/19/23		520,000		488,655
Latam Finance Ltd. 6.875% 4/11/24 (b)		200,000		88,910
7.000% 3/01/26 (b)		300,000		136,656
				714,221
Auto Manufacturers — 0.5%
General Motors Co. 3 mo. USD LIBOR + 0.800% 2.542% FRN 8/07/20		110,000		108,109
General Motors Financial Co., Inc. 3 mo. USD LIBOR + 0.990% 2.890% FRN 1/05/23		575,000		465,479
Hyundai Capital America 2.650% 2/10/25 (b)		460,000		438,251
Volkswagen Group of America Finance LLC 4.250% 11/13/23 (b)		500,000		494,740
				1,506,579
Auto Parts & Equipment — 0.0%
Panther BF Aggregator 2 LP/Panther Finance Co., Inc. 6.250% 5/15/26 (b)		115,000		108,675
Banks — 4.6%
Banco Bradesco SA/Cayman Islands 5.750% 3/01/22 (b)		200,000		201,250
Banco de Reservas de la Republica Dominicana 7.000% 2/01/23 (b)		200,000		188,500
Banco do Brasil SA 10 year CMT + 4.398% 6.250% VRN (b) (d)		500,000		391,750
Banco Internacional del Peru SAA Interbank 3 mo. USD LIBOR + 6.740% 8.500% VRN 4/23/70 (b)		200,000		195,000
Banco Macro SA 5 year USD Swap + 5.463% 6.750% VRN 11/04/26 (b)		500,000		302,505
Banco Mercantil del Norte SA/Grand Cayman 5 year CMT + 4.447% 5.750% VRN 10/04/31 (b)		200,000		169,600
5 year CMT + 5.035% 6.875% VRN (b) (d)		200,000		152,002
10 year CMT + 5.353% 7.625% VRN (b) (d)		600,000		457,500
Banco Santander SA 3 mo. USD LIBOR + 1.090% 2.773% FRN 2/23/23		400,000		378,922
Bancolombia SA 3.000% 1/29/25		200,000		178,702
5 year CMT + 2.929% 4.875% VRN 10/18/27		400,000		362,004
Bank of America Corp. 3 mo. USD LIBOR + 1.210% 3.974% VRN 2/07/30		400,000		431,172
Bank of Montreal 5 year USD Swap + 1.432% 3.803% VRN 12/15/32		370,000		359,383
Bank of New Zealand 3.500% 2/20/24 (b)		530,000		555,944
Barclays PLC 3 mo. USD LIBOR + 1.380% 3.072% FRN 5/16/24		425,000		374,257
BBVA Bancomer SA 5 year CMT + 2.650% 5.125% VRN 1/18/33 (b)		1,000,000		828,000
BDO Unibank, Inc. 2.950% 3/06/23 (b)		300,000		297,022
Citigroup, Inc. 3 mo. USD LIBOR + 1.100% 2.792% FRN 5/17/24		750,000		716,351
Commonwealth Bank of Australia 4.316% 1/10/48 (b)		505,000		492,853
Credit Agricole SA 3.750% 4/24/23 (b)		535,000		546,696
Credit Suisse Group AG 3 mo. USD LIBOR + 1.240% 2.024% FRN 6/12/24 (b)		430,000		379,863
DBS Group Holdings Ltd. 5 year USD Swap + 2.390% 3.600% VRN (b) (d)		600,000		550,500
Gilex Holding Sarl 8.500% 5/02/23 (b)		150,000		127,575
8.500% 5/02/23 (b)		150,000		127,575
Grupo Aval Ltd. 4.375% 2/04/30 (b)		200,000		160,500
HSBC Holdings PLC 3 mo. USD LIBOR + 1.380% 2.164% FRN 9/12/26		835,000		794,934
Lloyds Banking Group PLC 3 mo. USD LIBOR + 1.205% 3.574% VRN 11/07/28		400,000		396,889
Macquarie Group Ltd. 3 mo. USD LIBOR + 1.023% 3.189% VRN 11/28/23 (b)		160,000		163,948
3 mo. USD LIBOR + 1.330% 4.150% VRN 3/27/24 (b)		280,000		292,906

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Malayan Banking Bhd 5 year USD Swap + 2.542% 3.905% VRN 10/29/26 (b)	$	600,000	$	608,022
Mitsubishi UFJ Financial Group, Inc. 3 mo. USD LIBOR + 0.740% 2.320% FRN 3/02/23		495,000		470,566
Morgan Stanley 3 mo. USD LIBOR + 1.340% 3.591% VRN 7/22/28		230,000		233,536
Royal Bank of Scotland Group PLC 3 mo. USD LIBOR + 1.480% 3.498% VRN 5/15/23		285,000		281,445
Scotiabank Peru SAA 3 mo. USD LIBOR + 3.856% 4.500% VRN 12/13/27 (b)		100,000		94,001
Sumitomo Mitsui Financial Group, Inc. 3 mo. USD LIBOR + 0.740% 2.576% FRN 1/17/23		715,000		641,605
The Goldman Sachs Group, Inc. 3 mo. USD LIBOR + 1.170% 2.862% FRN 5/15/26		565,000		519,380
Union Bank of the Philippines 3.369% 11/29/22 (b)		400,000		395,396
United Overseas Bank Ltd. 5 year USD Swap + 1.794% 3.875% VRN (b) (d)		500,000		473,725
Wells Fargo & Co. 3 mo. USD LIBOR + 1.170% 2.879% VRN 10/30/30		115,000		113,907
3 mo. USD LIBOR + 1.170% 3.196% VRN 6/17/27		245,000		252,457
				14,658,143
Beverages — 0.1%
Anheuser-Busch InBev Worldwide, Inc. 4.600% 4/15/48		290,000		306,807
Constellation Brands, Inc. 3.150% 8/01/29		135,000		125,387
				432,194
Building Materials — 0.2%
Builders FirstSource, Inc. 5.000% 3/01/30 (b)		80,000		72,000
Carrier Global Corp. 3.377% 4/05/40 (b)		310,000		271,793
Cemex SAB de CV 6.125% 5/05/25 (b)		200,000		177,498
Griffon Corp. 5.750% 3/01/28 (b)		80,000		75,200
Owens Corning 4.400% 1/30/48		175,000		149,245
				745,736
Chemicals — 0.4%
DuPont de Nemours, Inc. 5.419% 11/15/48		205,000		225,555
Nutrien Ltd. 4.200% 4/01/29		265,000		276,497
Sociedad Quimica y Minera de Chile SA 4.375% 1/28/25 (b)		200,000		193,000
Syngenta Finance NV 5.676% 4/24/48 (b)		600,000		481,781
UPL Corp. Ltd. 3.250% 10/13/21 (b)		200,000		184,026
				1,360,859
Coal — 0.1%
Peabody Energy Corp. 6.000% 3/31/22 (b)		105,000		71,400
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp. 7.500% 6/15/25 (b)		150,000		108,000
				179,400
Commercial Services — 0.3%
Adani Ports & Special Economic Zone Ltd. 3.950% 1/19/22 (b)		200,000		190,723
Allied Universal Holdco LLC / Allied Universal Finance Corp. 6.625% 7/15/26 (b)		90,000		88,425
9.750% 7/15/27 (b)		105,000		98,952
Garda World Security Corp. 8.750% 5/15/25 (b)		135,000		124,200
MPH Acquisition Holdings LLC 7.125% 6/01/24 (b)		160,000		139,210
United Rentals North America, Inc. 6.500% 12/15/26		75,000		76,125
Verscend Escrow Corp. 9.750% 8/15/26 (b)		237,000		236,554
				954,189
Computers — 0.1%
Tempo Acquisition LLC / Tempo Acquisition Finance Corp. 6.750% 6/01/25 (b)		190,000		173,861
Distribution & Wholesale — 0.0%
Performance Food Group, Inc. 5.500% 10/15/27 (b)		115,000		106,663
Diversified Financial Services — 2.0%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 3.500% 1/15/25		450,000		364,880
Air Lease Corp. 3.750% 2/01/22		470,000		430,194
American Express Co. 2.500% 8/01/22		440,000		442,853
Avolon Holdings Funding Ltd. 3.250% 2/15/27 (b)		390,000		305,851
Banco BTG Pactual SA 5 year CMT + 5.257% 7.750% VRN 2/15/29 (b)		400,000		340,000
BOC Aviation Ltd. 3 mo. USD LIBOR + 1.125% 2.357% FRN 9/26/23 (b)		565,000		562,418
Capital One Financial Corp. 3 mo. USD LIBOR + 0.720% 2.490% FRN 1/30/23		140,000		130,847
Credito Real SAB de CV SOFOM ER 5 year CMT + 7.026% 9.125% VRN (b) (d)		200,000		152,002
Discover Financial Services 4.100% 2/09/27		570,000		558,570
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (b)		155,000		99,820
Interoceanica IV Finance Ltd. 0.000% 11/30/25 (b)		799,880		739,889
Mexarrend SAPI de CV 10.250% 7/24/24 (b)		200,000		136,002

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Nationstar Mortgage Holdings, Inc. 8.125% 7/15/23 (b)	$	125,000	$	122,225
Navient Corp. 5.000% 3/15/27		60,000		51,582
NFP Corp. 6.875% 7/15/25 (b)		155,000		152,675
Operadora de Servicios Mega SA de CV Sofom ER 8.250% 2/11/25 (b)		200,000		136,250
SPARC EM SPC Panama Metro Line 2 SP 0.000% 12/05/22 (b)		190,236		175,017
Springleaf Finance Corp. 5.375% 11/15/29		55,000		50,325
6.625% 1/15/28		120,000		113,400
SURA Asset Management SA 4.875% 4/17/24 (b)		200,000		195,500
Synchrony Financial 3.950% 12/01/27		500,000		444,292
The Charles Schwab Corp. 3.550% 2/01/24		465,000		489,044
Unifin Financiera SAB de CV 5 year CMT + 6.308% 8.875% VRN (b) (d)		600,000		360,006
				6,553,642
Electric — 2.6%
AES Andres BV/Dominican Power Partners/Empresa Generadora de Electricidad It 7.950% 5/11/26 (b)		500,000		463,250
AES Argentina Generacion SA 7.750% 2/02/24 (b)		150,000		84,375
AES Gener SA 5 year CMT + 4.917% 6.350% VRN 10/07/79 (b)		200,000		152,000
5 year CMT + 4.917% 6.350% VRN 10/07/79 (b)		200,000		152,000
5 year USD Swap + 4.644% 7.125% VRN 3/26/79 (b)		400,000		312,840
American Electric Power Co., Inc. 2.950% 12/15/22		313,000		303,715
Calpine Corp. 5.125% 3/15/28 (b)		100,000		92,000
Cometa Energia SA de CV 6.375% 4/24/35 (b)		387,600		350,778
DTE Energy Co. 3.800% 3/15/27		500,000		510,635
Duke Energy Corp. 3.750% 9/01/46		90,000		86,160
3.950% 8/15/47		240,000		231,196
Duke Energy Progress, Inc. 4.150% 12/01/44		315,000		353,889
Empresa Electrica Angamos SA 4.875% 5/25/29 (b)		165,200		157,766
Empresa Electrica Guacolda SA 4.560% 4/30/25 (b)		400,000		281,685
Georgia Power Co. 2.200% 9/15/24		455,000		426,808
LLPL Capital Pte Ltd. 6.875% 2/04/39 (b)		288,390		280,820
Minejesa Capital BV 4.625% 8/10/30 (b)		600,000		535,749
Monongahela Power Co. 5.400% 12/15/43 (b)		210,000		234,254
Pampa Energia SA 9.125% 4/15/29 (b)		150,000		99,751
PSEG Power LLC 3.850% 6/01/23		340,000		345,900
Sierra Pacific Power Co. 2.600% 5/01/26		1,000,000		999,616
Star Energy Geothermal Wayang Windu Ltd. 6.750% 4/24/33 (b)		552,000		497,042
Transelec SA 3.875% 1/12/29 (b)		250,000		225,190
4.625% 7/26/23 (b)		200,000		202,052
Xcel Energy, Inc. 3.300% 6/01/25		1,000,000		1,014,157
				8,393,628
Electronics — 0.1%
Arrow Electronics, Inc. 3.875% 1/12/28		290,000		270,834
Engineering & Construction — 0.3%
AECOM 5.125% 3/15/27		160,000		144,000
Aeropuerto Internacional de Tocumen SA 5.625% 5/18/36 (b)		200,000		204,002
Sydney Airport Finance Co. Pty Ltd. 3.375% 4/30/25 (b)		300,000		297,167
3.625% 4/28/26 (b)		300,000		321,490
				966,659
Entertainment — 0.2%
Caesars Resort Collection LLC/CRC Finco, Inc. 5.250% 10/15/25 (b)		130,000		93,886
Eldorado Resorts, Inc. 6.000% 4/01/25		125,000		112,500
Lions Gate Capital Holdings LLC 6.375% 2/01/24 (b)		160,000		140,800
Scientific Games International, Inc. 7.250% 11/15/29 (b)		75,000		46,875
Twin River Worldwide Holdings, Inc. 6.750% 6/01/27 (b)		110,000		82,500
				476,561
Environmental Controls — 0.2%
GFL Environmental, Inc. 5.125% 12/15/26 (b)		125,000		121,875
8.500% 5/01/27 (b)		51,000		51,240
Tervita Corp. 7.625% 12/01/21 (b)		220,000		154,000
Waste Management, Inc. 4.000% 7/15/39		355,000		385,826
				712,941

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Foods — 1.1%
Albertsons Cos., Inc. / Safeway, Inc. / New Albertsons LP / Albertson’s LLC 4.625% 1/15/27 (b)	$	95,000	$	94,525
B&G Foods, Inc. 5.250% 9/15/27		50,000		48,750
Grupo Bimbo SAB de CV 5 year CMT + 3.280% 5.950% VRN (b) (d)		400,000		373,760
JBS USA LUX SA/JBS USA Finance, Inc. 5.750% 6/15/25 (b)		20,000		20,200
5.875% 7/15/24 (b)		30,000		30,375
6.750% 2/15/28 (b)		126,000		134,505
Kraft Heinz Foods Co. 3.950% 7/15/25		55,000		54,735
5.000% 7/15/35		40,000		39,768
5.200% 7/15/45		115,000		110,560
The Kroger Co. 3.400% 4/15/22		490,000		504,256
MARB BondCo PLC 6.875% 1/19/25 (b) (c)		400,000		360,500
7.000% 3/15/24 (b)		200,000		178,000
Minerva Luxembourg SA 5.875% 1/19/28 (b)		300,000		264,753
6.500% 9/20/26 (b)		400,000		364,166
NBM US Holdings, Inc. 7.000% 5/14/26 (b)		200,000		181,500
Pilgrim’s Pride Corp. 5.875% 9/30/27 (b)		205,000		204,262
Post Holdings, Inc. 4.625% 4/15/30 (b)		110,000		105,325
Smithfield Foods, Inc. 4.250% 2/01/27 (b)		415,000		384,936
Sysco Corp. 3.300% 2/15/50		280,000		202,773
				3,657,649
Gas — 0.1%
The Brooklyn Union Gas Co. 4.487% 3/04/49 (b)		385,000		408,219
Health Care – Products — 0.0%
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA 7.250% 2/01/28 (b)		80,000		68,792
Health Care – Services — 0.2%
Centene Corp. 3.375% 2/15/30 (b)		75,000		69,750
4.250% 12/15/27 (b)		50,000		49,000
HCA, Inc. 5.375% 9/01/26		125,000		128,750
LifePoint Health, Inc. 4.375% 2/15/27 (b)		90,000		84,780
Radiology Partners, Inc. 9.250% 2/01/28 (b)		95,000		82,246
Select Medical Corp. 6.250% 8/15/26 (b)		150,000		150,000
Tenet Healthcare Corp. 5.125% 11/01/27 (b)		155,000		147,638
West Street Merger Sub, Inc. 6.375% 9/01/25 (b)		80,000		69,736
				781,900
Home Builders — 0.0%
Mattamy Group Corp. 4.625% 3/01/30 (b)		120,000		103,200
Home Furnishing — 0.1%
Tempur Sealy International, Inc. 5.500% 6/15/26		238,000		208,286
Household Products & Wares — 0.0%
Kronos Acquisition Holdings, Inc. 9.000% 8/15/23 (b)		105,000		86,100
Insurance — 0.8%
Alliant Holdings Intermediate LLC / Alliant Holdings Co-Issuer 6.750% 10/15/27 (b)		75,000		70,230
Athene Global Funding 3.000% 7/01/22 (b)		465,000		457,676
Equitable Holdings, Inc. 3.900% 4/20/23		490,000		485,620
GTCR AP Finance, Inc. 8.000% 5/15/27 (b)		95,000		87,400
Liberty Mutual Group, Inc. 3.951% 10/15/50 (b)		675,000		625,740
Prudential Financial, Inc. 3.905% 12/07/47		185,000		177,862
Willis North America, Inc. 4.500% 9/15/28		475,000		521,869
				2,426,397
Internet — 0.1%
Expedia, Inc. Co. 3.800% 2/15/28		275,000		237,708
Uber Technologies, Inc. 7.500% 9/15/27 (b)		90,000		88,848
				326,556
Iron & Steel — 0.1%
CSN Islands XII Corp. 7.000% (b) (d)		200,000		118,000
CSN Resources SA 7.625% 4/17/26 (b)		200,000		130,250
				248,250
Leisure Time — 0.1%
Royal Caribbean Cruises Ltd. 3.700% 3/15/28		90,000		56,634
Viking Cruises Ltd. 5.875% 9/15/27 (b)		160,000		93,617
				150,251
Lodging — 0.1%
Gohl Capital Ltd. 4.250% 1/24/27 (b)		200,000		163,887

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Machinery – Diversified — 0.1%
John Deere Capital Corp. 3.450% 1/10/24	$	210,000	$	219,540
Media — 0.5%
CCO Holdings LLC/CCO Holdings Capital Corp. 4.750% 3/01/30 (b)		105,000		104,475
Cengage Learning, Inc. 9.500% 6/15/24 (b)		75,000		55,500
Charter Communications Operating LLC/Charter Communications Operating Capital 4.908% 7/23/25		325,000		345,018
CSC Holdings LLC 5.250% 6/01/24		190,000		190,473
Diamond Sports Group LLC/Diamond Sports Finance Co. 5.375% 8/15/26 (b)		65,000		52,814
DISH DBS Corp. 5.875% 11/15/24		40,000		38,900
Gray Escrow, Inc. 7.000% 5/15/27 (b)		145,000		144,275
iHeartCommunications, Inc. 8.375% 5/01/27		25,000		21,766
Nexstar Broadcasting, Inc. 5.625% 7/15/27 (b)		65,000		63,537
Scripps Escrow, Inc. 5.875% 7/15/27 (b)		80,000		70,400
VTR Finance BV 6.875% 1/15/24 (b)		200,000		181,498
6.875% 1/15/24 (b)		200,000		181,498
				1,450,154
Mining — 0.5%
Anglo American Capital PLC 4.500% 3/15/28 (b)		585,000		579,456
Arconic Corp. 6.125% 2/15/28 (b)		110,000		112,475
Freeport-McMoRan, Inc. 5.400% 11/14/34		300,000		277,500
5.450% 3/15/43		450,000		402,750
Novelis Corp. 4.750% 1/30/30 (b)		50,000		44,500
Vedanta Resources Finance II PLC 9.250% 4/23/26 (b)		200,000		83,500
Vedanta Resources Ltd. 6.125% 8/09/24 (b)		600,000		233,879
				1,734,060
Miscellaneous - Manufacturing — 0.1%
Gates Global LLC / Gates Corp. 6.250% 1/15/26 (b)		75,000		66,375
General Electric Co. 5.875% 1/14/38		225,000		259,236
				325,611
Oil & Gas — 1.6%
Canacol Energy Ltd. 7.250% 5/03/25 (b)		400,000		344,004
7.250% 5/03/25 (b)(c)		200,000		172,002
CNOOC Finance 2015 USA LLC 3.750% 5/02/23		570,000		595,832
Cosan Overseas Ltd. 8.250% (b) (d)		500,000		445,755
Delek & Avner Tamar Bond Ltd. 5.082% 12/30/23 (b)		100,000		97,898
5.412% 12/30/25 (b)		100,000		95,541
Diamondback Energy, Inc. 2.875% 12/01/24		59,000		41,211
Geopark Ltd. 6.500% 9/21/24 (b)		600,000		340,500
Gran Tierra Energy International Holdings Ltd. 6.250% 2/15/25 (b)		400,000		99,000
Gulfport Energy Corp. 6.375% 5/15/25		105,000		25,462
Hilcorp Energy I LP / Hilcorp Finance Co. 6.250% 11/01/28 (b)		100,000		44,000
Indian Oil Corp. Ltd. 5.750% 8/01/23 (b)		600,000		587,922
Indigo Natural Resources LLC 6.875% 2/15/26 (b)		50,000		33,000
Marathon Petroleum Corp. 5.125% 12/15/26		430,000		425,712
Medco Bell Pte Ltd. 6.375% 1/30/27 (b)		200,000		115,999
MEG Energy Corp. 7.000% 3/31/24 (b)		30,000		13,838
7.125% 2/01/27 (b)		155,000		76,589
Oasis Petroleum, Inc. 6.875% 3/15/22		100,000		19,750
ONGC Videsh Vankorneft Pte Ltd. 3.750% 7/27/26 (b)		600,000		535,957
Parkland Fuel Corp. 5.875% 7/15/27 (b)		115,000		107,801
Petrobras Global Finance BV 6.900% 3/19/49		100,000		97,125
7.250% 3/17/44		100,000		101,080
QEP Resources, Inc. 5.625% 3/01/26		165,000		60,225
Sunoco LP / Sunoco Finance Corp. 5.500% 2/15/26		130,000		112,486
6.000% 4/15/27		90,000		77,400
Transocean Guardian Ltd. 5.875% 1/15/24 (b)		70,976		56,781
Transocean Poseidon Ltd. 6.875% 2/01/27 (b)		150,000		121,500
Transocean, Inc. 8.000% 2/01/27 (b)		80,000		38,000
WPX Energy, Inc. 4.500% 1/15/30		100,000		54,300
YPF Sociedad Anonima 6.950% 7/21/27 (b)		250,000		128,825
				5,065,495

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Oil & Gas Services — 0.1%
Halliburton Co. 2.920% 3/01/30	$	260,000	$	200,893
USA Compression Partners LP / USA Compression Finance Corp. 6.875% 9/01/27		185,000		114,700
				315,593
Packaging & Containers — 0.3%
Flex Acquisition Co., Inc. 6.875% 1/15/25 (b)		125,000		116,875
Packaging Corp. of America 3.400% 12/15/27		215,000		214,145
Silgan Holdings, Inc. 4.125% 2/01/28 (b)		45,000		41,513
WRKCo, Inc. 3.750% 3/15/25		420,000		422,215
				794,748
Pharmaceuticals — 0.9%
AbbVie, Inc. 4.700% 5/14/45		215,000		241,486
AstraZeneca PLC 6.450% 9/15/37		265,000		375,808
Bausch Health Cos., Inc. 5.000% 1/30/28 (b)		80,000		75,736
5.250% 1/30/30 (b)		80,000		75,645
Becton Dickinson and Co. 2.894% 6/06/22		760,000		758,582
Bristol-Myers Squibb Co. 4.350% 11/15/47 (b)		355,000		447,041
Cigna Corp. 3 mo. USD LIBOR + 0.890% 2.721% FRN 7/15/23		270,000		251,045
4.900% 12/15/48		215,000		257,954
Shire Acquisitions Investments Ireland DAC 2.875% 9/23/23		530,000		533,851
				3,017,148
Pipelines — 1.1%
AI Candelaria Spain SLU 7.500% 12/15/28 (b)		250,000		185,729
Antero Midstream Partners LP / Antero Midstream Finance Corp. 5.750% 3/01/27 (b)		54,000		34,560
Cheniere Energy Partners LP 5.250% 10/01/25		105,000		96,600
5.625% 10/01/26		95,000		87,400
Enable Midstream Partners LP 4.400% 3/15/27		295,000		180,196
Energy Transfer Operating LP 4.750% 1/15/26		470,000		428,436
Fermaca Enterprises S de RL de CV 6.375% 3/30/38 (b)		215,442		212,079
GNL Quintero SA 4.634% 7/31/29 (b)		550,000		522,500
Hess Midstream Operations LP 5.125% 6/15/28 (b)		125,000		87,850
Kinder Morgan Energy Partners LP 6.950% 1/15/38		400,000		416,039
ONEOK, Inc. 3.400% 9/01/29		140,000		104,507
Sabine Pass Liquefaction LLC 5.000% 3/15/27		470,000		399,356
Sunoco Logistics Partners Operations LP 3.900% 7/15/26		750,000		627,433
Targa Resources Partners LP/Targa Resources Partners Finance Corp. 5.500% 3/01/30 (b)		155,000		119,722
				3,502,407
Real Estate — 0.1%
Radiant Access Ltd. 4.600% (b) (d)		200,000		187,100
Real Estate Investment Trusts (REITS) — 1.1%
Alexandria Real Estate Equities, Inc. 4.000% 1/15/24		320,000		326,889
American Tower Corp. 3.600% 1/15/28		470,000		467,144
Boston Properties LP 3.400% 6/21/29		435,000		418,244
Crown Castle International Corp. 3.700% 6/15/26		700,000		715,269
4.000% 3/01/27		225,000		231,704
ESH Hospitality, Inc. 5.250% 5/01/25 (b)		105,000		88,200
MPT Operating Partnership LP/MPT Finance Corp. 5.250% 8/01/26		185,000		181,497
National Retail Properties, Inc. 2.500% 4/15/30		115,000		102,313
Public Storage 3.385% 5/01/29		445,000		446,082
Simon Property Group LP 2.450% 9/13/29		25,000		22,661
VICI Properties LP / VICI Note Co., Inc. 3.750% 2/15/27 (b)		15,000		14,137
4.125% 8/15/30 (b)		15,000		14,044
Welltower, Inc. 3.950% 9/01/23		460,000		455,609
				3,483,793

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Retail — 0.4%
Asbury Automotive Group, Inc. 4.500% 3/01/28 (b)	$	16,000	$	13,600
4.750% 3/01/30 (b)		16,000		13,600
Beacon Roofing Supply, Inc. 4.875% 11/01/25 (b)		160,000		144,400
Carvana Co. 8.875% 10/01/23 (b)		40,000		37,800
Golden Nugget, Inc. 6.750% 10/15/24 (b)		175,000		110,231
The Home Depot, Inc. 3.900% 6/15/47		220,000		243,196
IRB Holding Corp. 6.750% 2/15/26 (b)		120,000		94,550
McDonald’s Corp. 4.450% 3/01/47		235,000		254,177
PetSmart, Inc. 5.875% 6/01/25 (b)		39,000		38,415
7.125% 3/15/23 (b)		115,000		107,094
Staples, Inc. 7.500% 4/15/26 (b)		115,000		101,631
Yum! Brands, Inc. 7.750% 4/01/25 (b) (e)		35,000		36,750
				1,195,444
Semiconductors — 0.2%
Marvell Technology Group Ltd. 4.200% 6/22/23		485,000		495,849
NXP BV / NXP Funding LLC / NXP USA, Inc. 3.875% 6/18/26 (b)		265,000		257,795
				753,644
Software — 0.1%
Genesys Telecommunications Laboratories, Inc./Greeneden Lux 3 Sarl/Greeneden US Ho 10.000% 11/30/24 (b)		155,000		158,532
Oracle Corp. 3.850% 4/01/60 (e)		265,000		266,715
				425,247
Telecommunications — 1.2%
AT&T, Inc. 5.250% 3/01/37		600,000		700,014
CenturyLink, Inc. 4.000% 2/15/27 (b)		85,000		82,450
5.125% 12/15/26 (b)		105,000		105,000
Comunicaciones Celulares SA Via Comcel Trust 6.875% 2/06/24 (b)		200,000		194,002
Corning, Inc. 4.375% 11/15/57		260,000		268,405
Digicel Group Two Ltd. 9.125% 4/01/24 (b)		507,159		63,395
Empresa Nacional de Telecomunicaciones SA 4.750% 8/01/26 (b)		300,000		282,646
Front Range BidCo, Inc. 4.000% 3/01/27 (b)		90,000		86,063
6.125% 3/01/28 (b)		50,000		47,500
Frontier Communications Corp. 8.000% 4/01/27 (b)		105,000		103,559
Gogo Intermediate Holdings LLC / Gogo Finance Co., Inc. 9.875% 5/01/24 (b)		75,000		59,250
GTT Communications, Inc. 7.875% 12/31/24 (b)		80,000		51,600
Intelsat Jackson Holdings SA 8.500% 10/15/24 (b)		85,000		53,525
Millicom International Cellular SA 5.125% 1/15/28 (b)		200,000		174,000
6.250% 3/25/29 (b)		200,000		179,000
6.625% 10/15/26 (b)		200,000		189,780
Network i2i Ltd. 5 year CMT + 4.277% 5.650% VRN (b) (d)		200,000		161,000
Sprint Corp. 7.125% 6/15/24		165,000		181,112
Telesat Canada/telesat L 6.500% 10/15/27 (b)		40,000		38,400
Telfon Celuar Del Paragu SA 5.875% 4/15/27 (b)		200,000		180,383
Verizon Communications, Inc. 4.400% 11/01/34		485,000		566,064
				3,767,148
Toys, Games & Hobbies — 0.1%
Hasbro, Inc. 3.500% 9/15/27		510,000		469,606
Transportation — 0.5%
CSX Corp. 3.800% 11/01/46		400,000		401,437
Empresa de Transporte de Pasajeros Metro SA 5.000% 1/25/47 (b)		750,000		750,000
FedEx Corp. 4.750% 11/15/45		255,000		244,358
Fideicomiso PA Pacifico Tres 8.250% 1/15/35 (b)		200,000		192,000
JSL Europe SA 7.750% 7/26/24 (b) (c)		200,000		144,258
				1,732,053
Trucking & Leasing — 0.1%
Penske Truck Leasing Co. LP/PTL Finance Corp. 4.200% 4/01/27 (b)		225,000		231,037
TOTAL CORPORATE DEBT (Cost $84,573,858)				77,729,837
Municipal Obligations — 0.1%
Missouri Highway & Transportation Commission, Revenue Bonds 5.063% 5/01/24		135,000		153,072
State of California BAB, General Obligation 7.550% 4/01/39		190,000		308,313
				461,385
TOTAL MUNICIPAL OBLIGATIONS (Cost $428,519)				461,385

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Non-U.S. Government Agency Obligations — 21.8%
Commercial MBS — 5.4%
Barclays Commercial Mortgage Trust, Series 2019-C3, Class B 4.096% 5/15/52	$	335,000	$	308,102
BFLD 2019-DPLO, Series 2019-DPLO, Class E, 1 mo. USD LIBOR + 2.240% 2.945% FRN 10/15/34 (b)		491,000		359,618
BX Trust 2019-OC11, Series 2019-OC11, Class E, 4.076% VRN 12/09/41 (b) (f)		391,000		281,552
CFCRE Commercial Mortgage Trust, Series 2016-C3, Class XA, 1.019% VRN 1/10/48 (f)		5,628,204		267,189
CHT Mortgage Trust Series 2017-CSMO, Class E, 1 mo. USD LIBOR + 3.000% 3.705% FRN 11/15/36 (b)		378,000		264,600
Series 2017-CSMO, Class F, 1 mo. USD LIBOR + 3.741% 4.446% FRN 11/15/36 (b)		668,000		434,200
Citigroup Commercial Mortgage Trust Series 2015-GC35, Class XA, 0.849% VRN 11/10/48 (f)		5,200,500		155,892
Series 2016-GC36, Class D, 2.850% 2/10/49 (b)		281,000		197,678
Series 2015-GC31, Class C, 4.057% VRN 6/10/48 (f)		700,000		648,407
Series 2017-C4, Class B, 4.096% VRN 10/12/50 (f)		340,000		316,479
Series 2015-GC35, Class C, 4.497% VRN 11/10/48 (f)		413,000		373,802
COMM Mortgage Trust Series 2012-CR4, Class D, 4.593% VRN 10/15/45 (b) (f)		738,000		329,431
Series 2015-LC23, Class C, 4.645% VRN 10/10/48 (f)		470,000		432,072
Commercial Mortgage Pass-Through Certificates, Series 2016-CR28, Class C, 4.646% VRN 2/10/49 (f)		465,000		419,937
CSAIL Commercial Mortgage Trust Series 2015-C1, Class XA, 0.837% VRN 4/15/50 (f)		8,354,949		271,509
Series 2019-C16, Class AS, 3.612% 6/15/52		334,000		329,456
Series 2019-C16, Class B, 3.885% 6/15/52		334,000		315,926
Series 2015-C4, Class C, 4.580% VRN 11/15/48 (f)		427,000		393,599
Series 2018-C14, Class C, 4.892% VRN 11/15/51 (f)		405,000		354,297
DBGS Mortgage Trust, Series 2018-5BP, Class F, 1 mo. USD LIBOR + 2.450% 3.155% FRN 6/15/33 (b)		550,000		431,628
Fontainebleau Miami Beach Trust Series 2019-FBLU, Class E, 4.095% 12/10/36 (b)		262,000		204,743
Series 2019-FBLU, Class G, 4.095% VRN 12/10/36 (b) (f)		262,000		180,638
GS Mortgage Securities Trust Series 2015-GS1, Class XA, 0.780% VRN 11/10/48 (f)		7,932,842		290,401
Series 2013-GC10, Class XA, 1.499% VRN 2/10/46 (f)		4,502,689		154,640
Series 2014-GC26, Class D, 4.515% VRN 11/10/47 (b) (f)		1,258,000		943,363
GSCG Trust, Series 2019-600C, Class E, 4.118% VRN 9/06/34 (b) (f)		497,000		430,114
HPLY Trust, Series 2019-HIT, Class F, 1 mo. USD LIBOR + 3.150% 3.855% FRN 11/15/36 (b)		435,241		291,611
JP Morgan Chase Commercial Mortgage Securities Trust Series 2015-JP1, Class XA, 1.078% VRN 1/15/49 (f)		5,197,716		174,708
Series 2016-JP2, Class B, 3.460% 8/15/49		174,000		158,392
JPMBB Commercial Mortgage Securities Trust Series 2015-C30, Class XA, 0.515% VRN 7/15/48 (f)		9,547,092		213,933
Series 2015-C29, Class XA, 0.741% VRN 5/15/48 (f)		8,830,476		220,163
Series 2014-C25, Class XA, 0.852% VRN 11/15/47 (f)		4,329,799		139,091
Series 2015-C28, Class XA, 1.057% VRN 10/15/48 (f)		7,541,172		254,368
Series 2015-C27, Class D, 3.807% VRN 2/15/48 (b) (f)		704,000		544,024
Series 2015-C29, Class C, 4.178% VRN 5/15/48 (f)		325,000		292,808
Series 2015-C33, Class C, 4.622% VRN 12/15/48 (f)		527,000		480,715
Series 2015-C32, Class C, 4.656% VRN 11/15/48 (f)		87,000		79,651
Morgan Stanley Bank of America Merrill Lynch Trust Series 2015-C27, Class D, 3.237% VRN 12/15/47 (b) (f)		504,000		364,086
Series 2015-C23, Class C, 4.155% VRN 7/15/50 (f)		650,000		578,130
Series 2015-C27, Class C, 4.526% VRN 12/15/47 (f)		351,000		314,369
Morgan Stanley Capital I Trust, Series 2015-UBS8, Class XA, 0.881% VRN 12/15/48 (f)		6,303,074		256,945
MSCG Trust, Series 2016-SNR, Class C 5.205% 11/15/34 (b)		458,150		452,033
Natixis Commercial Mortgage Securities Trust, Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.200% 3.859% FRN 6/15/35 (b)		368,000		331,452
SG Commercial Mortgage Securities Trust, Series 2016-C5, Class XA, 1.975% VRN 10/10/48 (f)		3,848,028		303,987
UBS Commercial Mortgage Trust, Series 2017-C6, Class B, 4.154% VRN 12/15/50 (f)		340,000		318,400
Wells Fargo Commercial Mortgage Trust Series 2015-NXS2, Class XA, 0.709% VRN 7/15/58 (f)		10,310,468		299,408
Series 2015-P2, Class XA, 0.981% VRN 12/15/48 (f)		5,347,433		196,450
Series 2015-C31, Class XA, 1.013% VRN 11/15/48 (f)		6,326,235		282,595
Series 2019-C51, Class B, 3.836% VRN 6/15/52 (f)		500,000		445,294
Series 2014-LC16, Class D, 3.938% 8/15/50 (b)		169,000		104,026
Series 2019-C50, Class B, 4.192% 5/15/52		409,000		383,160
Series 2019-C50, Class C, 4.345% 5/15/52		409,000		331,919
Series 2015-NXS4, Class C, 4.670% VRN 12/15/48 (f)		421,000		387,630
				17,288,621
Home Equity ABS — 0.8%
GSAA Home Equity Trust, Series 2007-10, Class A2A 6.500% 11/25/37		4,153,329		2,773,670
Other ABS — 8.1%
AASET US Ltd., Series 2018-1A, Class A 3.844% 1/16/38 (b)		584,234		484,883
ALM R Ltd., Series 2013-7RA, Class CR, 3 mo. USD LIBOR + 4.040% 5.871% FRN 10/15/28 (b)		1,000,000		840,156
ANCHORAGE CAPITAL CLO 13 LLC, Series 2019-13A, Class B, 3 mo. USD LIBOR + 2.000% 3.831% FRN 4/15/32 (b)		500,000		452,751
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class B, 5.682% STEP 12/16/41 (b)		802,083		545,963
BlueMountain CLO Ltd. Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.600% 4.419% FRN 4/20/31 (b)		1,000,000		697,682
Series 2013-1A, Class CR, 3 mo. USD LIBOR + 4.150% 5.969% FRN 1/20/29 (b)		1,000,000		834,303
CAL Funding Ltd., Series 2018-1A, Class A 3.960% 2/25/43 (b)		395,833		398,132
CLI Funding LLC Series 2014-2A, Class A, 3.380% 10/18/29 (b)		300,844		271,310
Series 2019-1A, Class A, 3.710% 5/18/44 (b)		459,387		451,362
Dryden 40 Senior Loan Fund, Series 2015-40A, Class DR, 3 mo. USD LIBOR + 3.100% 4.792% FRN 8/15/31 (b)		500,000		370,149
Gilbert Park CLO Ltd. Series 2017-1A, Class D, 3 mo. USD LIBOR + 2.950% 4.781% FRN 10/15/30 (b)		500,000		382,995
Series 2017-1A, Class E, 3 mo. USD LIBOR + 6.400% 8.231% FRN 10/15/30 (b)		1,000,000		647,039
Global SC Finance SRL Series 2014-1A, Class A1, 3.190% 7/17/29 (b)		307,667		262,093
Series 2018-1A, Class A, 4.290% 5/17/38 (b)		489,480		488,869
Grippen Park CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.300% 5.119% FRN 1/20/30 (b)		1,000,000		792,076
Helios Issuer LLC, Series 2017-1A, Class A 4.940% 9/20/49 (b)		215,121		201,887

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Hero Funding Trust, Series 2016-4A, Class A2 4.290% 9/20/47 (b)	$	242,542	$	255,538
Highbridge Loan Management Ltd., Series 13A-18, Class D, 3 mo. USD LIBOR + 3.000% 4.831% FRN 10/15/30 (b)		500,000		359,330
Invitation Homes Trust Series 2018-SFR1, Class C, 1 mo. USD LIBOR + 1.250% 2.050% FRN 3/17/37 (b)		1,145,000		933,463
Series 2018-SFR1, Class D, 1 mo. USD LIBOR + 1.450% 2.250% FRN 3/17/37 (b)		750,000		580,947
JOL Air Ltd., Series 2019-1, Class A 3.967% 4/15/44 (b)		455,536		335,630
LCM LP, Series 19A, Class D, 3 mo. USD LIBOR + 3.450% 5.281% FRN 7/15/27 (b)		1,000,000		829,129
MACH 1 Cayman Ltd., Series 2019-1, Class A 3.474% 10/15/39 (b)		483,724		338,166
Madison Park Funding Ltd. Series 2014-14A, Class DRR, 3 mo. USD LIBOR + 2.950% 4.752% FRN 10/22/30 (b)		500,000		362,794
Series 2014-15A, Class DR, 3 mo. USD LIBOR + 5.440% 7.234% FRN 1/27/26 (b)		1,000,000		775,511
Merrill Lynch Mortgage Investors Trust, Series 2006-OPT1, Class A2C, 1 mo. USD LIBOR + 0.150% 1.097% FRN 8/25/37		2,042,852		1,873,041
Mosaic Solar Loans LLC, Series 2017-1A, Class A 4.450% 6/20/42 (b)		442,805		432,858
Newark BSL CLO 2 Ltd., Series 2017-1A, Class C, 3 mo. USD LIBOR + 3.650% 5.444% FRN 7/25/30 (b)		500,000		401,912
Oak Hill Credit Partners Ltd., Series 2018-1A, Class D, 3 mo. USD LIBOR + 3.050% 4.869% FRN 10/20/30 (b)		500,000		366,373
Octagon Investment Partners Ltd. Series 2017-1A, Class C, 3 mo. USD LIBOR + 3.500% 5.319% FRN 3/17/30 (b)		1,000,000		787,070
Series 2017-1A, Class D, 3 mo. USD LIBOR + 6.200% 8.019% FRN 3/17/30 (b)		500,000		302,851
Octagon Investment Partners XXII Ltd., Series 2014-1A, Class ERR, 3 mo. USD LIBOR + 5.450% 7.252% FRN 1/22/30 (b)		1,000,000		544,565
Primose Funding LLC, Series 2019-1A, Class A2 4.475% 7/30/49 (b)		997,500		906,139
Sprite Ltd., Series 2017-1, Class A 4.250% 12/15/37 (b)		334,089		251,135
START Ireland, Series 2019-1, Class A 4.089% 3/15/44 (b)		464,286		324,752
Sunrun Atlas Issuer 2019-2 LLC, Series 2019-2, Class A 3.610% 2/01/55 (b)		745,337		654,303
Symphony CLO Ltd., Series 2015-16A, Class DR, 3 mo. USD LIBOR + 3.050% 4.881% FRN 10/15/31 (b)		500,000		367,167
TAL Advantage LLC Series 2013-1A, Class A, 2.830% 2/22/38 (b)		145,833		142,966
Series 2014-1A, Class A, 3.510% 2/22/39 (b)		269,467		268,255
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A 3.960% 4/20/44 (b)		463,333		443,081
Thacher Park CLO Ltd., Series 2014-1A, Class D1R, 3 mo. USD LIBOR + 3.400% 5.219% FRN 10/20/26 (b)		1,000,000		885,007
Thunderbolt Aircraft Lease Ltd. Series 2018-A, Class A, 4.147% STEP 9/15/38 (b)		446,429		317,488
Series 2017-A, Class A, 4.212% STEP 5/17/32 (b)		897,290		669,633
Trip Rail Master Funding LLC, Series 2017-1A, Class A1 2.709% 8/15/47 (b)		221,185		218,749
Triton Container Finance LLC, Series 2018-1A, Class A 3.950% 3/20/43 (b)		400,000		402,191
Vantage Data Centers Issuer LLC, Series 2018-1A, Class A2 4.072% 2/16/43 (b)		734,375		717,956
Westcott Park CLO Ltd., Series 2016-1A, Class DR, 3 mo. USD LIBOR + 3.250% 5.069% FRN 7/20/28 (b)		500,000		403,936
Willis Engine Structured Trust IV, Series 2018-A, Class A, 4.750% STEP 9/15/43 (b)		812,542		567,579
Wind River CLO Ltd., Series 2017-1A, Class D, 3 mo. USD LIBOR + 3.750% 5.569% FRN 4/18/29 (b)		1,000,000		824,721
				25,965,886
Student Loans ABS — 0.4%
College Ave Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 2.147% FRN 12/26/47 (b)		408,545		379,658
SoFi Professional Loan Program LLC Series 2017-D, Class BFX, 3.610% 9/25/40 (b)		350,000		325,777
Series 2018-B, Class BFX, 3.830% 8/25/47 (b)		500,000		475,237
				1,180,672
WL Collateral CMO — 6.6%
Citigroup Mortgage Loan Trust, Series 2007-AR5, Class 1A2A, 4.056% VRN 4/25/37 (f)		1,566,235		1,335,432
CitiMortgage Alternative Loan Trust, Series 2006-A1, Class 1A5 5.500% 4/25/36		2,241,772		2,169,595
Countrywide Alternative Loan Trust Series 2006-13T1, Class A11, 6.000% 5/25/36		2,087,910		1,420,452
Series 2006-36T2, Class 2A1, 6.250% 12/25/36		3,659,766		2,372,431
Countrywide Home Loans Mortgage Pass-Through Trust Series 2007-HYB2, Class 3A1, 3.419% VRN 2/25/47 (f)		1,324,714		1,151,148
Series 2007-14, Class A6, 6.000% 9/25/37		1,640,346		1,296,532
HarborView Mortgage Loan Trust, Series 2006-11, Class A1A, 1 mo. USD LIBOR + 0.170% 0.920% FRN 12/19/36		1,117,945		930,311
IndyMac INDX Mortgage Loan Trust, Series 2007-AR5, Class 2A1, 3.610% VRN 5/25/37 (f)		2,548,654		2,122,504
Lehman XS Trust, Series 2007-12N, Class 1A3A, 1 mo. LIBOR + 0.200% 1.147% FRN 7/25/47		3,035,962		2,999,749
Morgan Stanley Mortgage Loan Trust, Series 2005-3AR, Class 2A1, 3.506% VRN 7/25/35 (f)		461,781		410,713
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2006-AR1, Class 2A1, 4.042% VRN 2/25/36 (f)		2,419,605		1,991,858
RBSSP Resecuritization Trust, Series 2009-5, Class 2A3, 6.500% VRN 10/26/37 (b) (f)		1,021,854		751,253
RFMSI Trust, Series 2007-S4, Class A5, 1 mo. USD LIBOR + 0.600% 6.000% FRN 4/25/37		337,288		298,811
Structured Adjustable Rate Mortgage Loan Trust, Series 2008-1, Class A2, 3.692% VRN 10/25/37 (f)		1,047,545		888,326
Washington Mutual Mortgage Pass-Through Certificates Trust, Series 2006-4, Class 3A5, 6.350% STEP 5/25/36		1,100,275		986,311
				21,125,426

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
WL Collateral PAC — 0.5%
Countrywide Alternative Loan Trust, Series 2006-19CB, Class A15 6.000% 8/25/36	$	1,933,403	$	1,510,258
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $82,722,830)				69,844,533
Sovereign Debt Obligations — 0.3%
Mexico Government International Bond 3.750% 1/11/28		535,000		531,795
4.150% 3/28/27		343,000		347,974
Perusahaan Penerbit SBSN Indonesia 4.150% 3/29/27 (b)		200,000		199,958
				1,079,727
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,087,426)				1,079,727
U.S. Government Agency Obligations and Instrumentalities — 18.1%
Collateralized Mortgage Obligations — 13.4%
Federal Home Loan Mortgage Corp. REMICS Series 4934, Class P, 2.500% 11/15/40		2,817,223		2,937,727
Series 4093, Class PA, 3.000% 8/15/42		4,214,924		4,398,117
Series 4481, Class B, 3.000% 12/15/42		5,391,259		5,809,734
Series 4483, Class CA, 3.000% 6/15/44		5,090,791		5,495,937
Series 4750, Class PA, 3.000% 7/15/46		2,151,843		2,239,587
Federal Home Loan Mortgage Corp. SCRT (f) Series 2018-2, Class HV 3.000% 11/25/57		2,830,596		2,860,175
Federal Home Loan Mortgage Corp. STRIPS Series 355, Class 300, 3.000% 8/15/47		2,817,793		2,973,372
Series 358, Class 300, 3.000% 10/15/47		2,501,936		2,640,726
Federal National Mortgage Association REMICS Series 2018-21, Class PO, 0.000% 4/25/48		3,128,801		2,946,821
Series 2015-9, Class HA, 3.000% 1/25/45		684,103		730,694
Government National Mortgage Association Series 2015-74, Class LZ, 3.500% 5/20/45		3,391,337		3,828,462
Series 2015-92, Class CZ, 3.500% 6/20/45		5,396,130		6,056,704
				42,918,056
Pass-Through Securities — 4.7%
Federal Home Loan Mortgage Corp. Pool #BL5484 2.260% 1/01/30		3,000,000		3,196,347
Pool #G08520 2.500% 1/01/43		1,123,018		1,170,395
Pool #SB0048 3.000% 8/01/34		2,701,741		2,837,562
Pool #G08632 3.500% 3/01/45		2,215,306		2,363,976
Federal National Mortgage Association Pool #MA2248 3.000% 4/01/45		2,082,692		2,178,473
Pool #AS7661 3.000% 8/01/46		1,413,420		1,477,539
Pool #AX2501 4.000% 10/01/44		1,751,999		1,890,943
				15,115,235
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $53,531,449)				58,033,291
U.S. Treasury Obligations — 28.3%
U.S. Treasury Bonds & Notes — 28.3%
U.S. Treasury Bond 2.000% 2/15/50		260,000		301,136
2.750% 11/15/42		280,000		361,381
2.750% 11/15/47		6,430,000		8,496,173
3.125% 2/15/43		2,890,000		3,947,824
3.625% 8/15/43		2,150,000		3,167,879
3.750% 11/15/43		2,410,000		3,620,703
U.S. Treasury Inflation Index 0.125% 10/15/24		4,152,096		4,202,700
0.875% 1/15/29		1,031,745		1,120,717
U.S. Treasury Note 0.375% 3/31/22		10,000,000		10,029,288
0.500% 3/15/23		14,000,000		14,086,696
0.500% 3/31/25		4,000,000		4,024,181
1.625% 10/31/26		4,910,000		5,250,300
1.750% 11/30/21		515,000		527,966
2.125% 9/30/24		1,320,000		1,423,132
2.250% 10/31/24		3,500,000		3,795,962
2.250% 8/15/27		5,080,000		5,692,870
2.250% 11/15/27		5,020,000		5,637,600
2.375% 5/15/29		4,510,000		5,178,819
2.625% 1/31/26		620,000		695,936
2.750% 2/28/25		3,070,000		3,419,951
3.000% 9/30/25		4,910,000		5,584,663
				90,565,877
TOTAL U.S. TREASURY OBLIGATIONS (Cost $83,080,705)				90,565,877
TOTAL BONDS & NOTES (Cost $316,083,022)				307,259,195

	Number of Shares
Mutual Funds — 0.1%
Diversified Financial Services — 0.1%
State Street Navigator Securities Lending Prime Portfolio (g)	154,275	154,275
TOTAL MUTUAL FUNDS (Cost $154,275)		154,275
TOTAL LONG-TERM INVESTMENTS (Cost $316,237,297)		307,413,470

MML Dynamic Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 3.0%
Repurchase Agreement — 3.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (h)	$	9,546,107	$	9,546,107
U.S. Treasury Bill — 0.0%
U.S. Treasury Bill
1.535% 11/05/20		105,000		104,949
TOTAL SHORT-TERM INVESTMENTS (Cost $9,650,131)				9,651,056
TOTAL INVESTMENTS — 98.9% (Cost $325,887,428) (i)				317,064,526
Other Assets/(Liabilities) — 1.1%				3,561,309
NET ASSETS — 100.0%			$	320,625,835

Abbreviation Legend
ABS	Asset-Backed Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
FRN	Floating Rate Note
MBS	Mortgage-Backed Security
PAC	Planned Amortization Class
PO	Principal Only
STEP	Step Up Bond
VRN	Variable Rate Note
WL	Whole Loan

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	All or a portion of the security represents unsettled loan commitments at March 31, 2020 where the rate will be determined at time of settlement.
(b)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2020, the aggregate market value of these securities amounted to $72,233,980 or 22.53% of net assets.
(c)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $573,901 or 0.18% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $426,824 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)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(f)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at March 31, 2020.
(g)	Represents investment of security lending cash collateral. (Note 2).
(h)	Maturity value of $9,546,107. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $9,738,607.
(i)	See Note 3 for aggregate cost for federal tax purposes.

Currency Legend

USD U.S. Dollar

MML Equity Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 98.3%
Common Stock — 97.7%
Basic Materials — 2.5%
Chemicals — 2.0%
Albemarle Corp. (a)		6,600	$	372,042
Celanese Corp.		7,500		550,425
DuPont de Nemours, Inc.		13,200		450,120
Eastman Chemical Co.		8,400		391,272
FMC Corp.		8,100		661,689
Huntsman Corp.		12,100		174,603
Linde PLC		31,832		5,506,936
LyondellBasell Industries NV Class A		24,100		1,196,083
PPG Industries, Inc.		30,700		2,566,520
				11,869,690
Forest Products & Paper — 0.2%
International Paper Co.		42,621		1,326,792
Iron & Steel — 0.2%
Nucor Corp.		18,900		680,778
Reliance Steel & Aluminum Co.		4,200		367,878
Steel Dynamics, Inc.		13,300		299,782
				1,348,438
Mining — 0.1%
Freeport-McMoRan, Inc.		82,500		556,875
				15,101,795
Communications — 8.1%
Advertising — 0.2%
The Interpublic Group of Cos., Inc.		20,200		327,038
Omnicom Group, Inc.		13,500		741,150
				1,068,188
Internet — 1.1%
Alphabet, Inc. Class C (b)		4,137		4,810,545
eBay, Inc.		50,300		1,512,018
Facebook, Inc. Class A (b)		2,900		483,720
				6,806,283
Media — 1.9%
Charter Communications, Inc. Class A (b)		1,000		436,310
Comcast Corp. Class A		280,400		9,640,152
Discovery, Inc. Class A (b)		5,600		108,864
The Walt Disney Co.		10,200		985,320
				11,170,646
Telecommunications — 4.9%
AT&T, Inc.		411,200		11,986,480
Corning, Inc.		27,000		554,580
Juniper Networks, Inc.		20,700		396,198
Motorola Solutions, Inc.		19,290		2,564,027
Verizon Communications, Inc.		256,400		13,776,372
				29,277,657
				48,322,774
Consumer, Cyclical — 4.8%
Airlines — 0.4%
Alaska Air Group, Inc.		7,600		216,372
Delta Air Lines, Inc.		40,100		1,144,053
JetBlue Airways Corp. (a) (b)		17,700		158,415
Southwest Airlines Co.		32,600		1,160,886
United Airlines Holdings, Inc. (b)		265		8,360
				2,688,086
Apparel — 0.1%
Ralph Lauren Corp.		3,000		200,490
Skechers U.S.A., Inc. Class A (b)		8,300		197,042
VF Corp.		1,100		59,488
				457,020
Auto Manufacturers — 0.8%
Cummins, Inc.		13,100		1,772,692
General Motors Co.		75,000		1,558,500
PACCAR, Inc.		21,500		1,314,295
				4,645,487
Auto Parts & Equipment — 0.2%
Allison Transmission Holdings, Inc.		7,400		241,314
Aptiv PLC		15,900		782,916
BorgWarner, Inc.		12,800		311,936
Lear Corp.		2,100		170,625
				1,506,791
Distribution & Wholesale — 0.2%
HD Supply Holdings, Inc. (b)		9,200		261,556
LKQ Corp. (b)		19,100		391,741
W.W. Grainger, Inc.		3,400		844,900
				1,498,197
Home Builders — 0.3%
D.R. Horton, Inc.		22,900		778,600
Lennar Corp. Class A		17,400		664,680
PulteGroup, Inc.		15,900		354,888
				1,798,168

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Home Furnishings — 0.1%
Whirlpool Corp. (a)		4,100	$	351,780
Housewares — 0.1%
Newell Brands, Inc.		26,300		349,264
Leisure Time — 0.0%
Harley-Davidson, Inc. (a)		9,600		181,728
Lodging — 0.2%
Hilton Worldwide Holdings, Inc.		12,800		873,472
Hyatt Hotels Corp. Class A		2,100		100,590
Marriott International, Inc. Class A		7,538		563,918
				1,537,980
Retail — 2.3%
Advance Auto Parts, Inc.		2,500		233,300
AutoZone, Inc. (b)		1,500		1,269,000
Best Buy Co., Inc.		16,100		917,700
CarMax, Inc. (b)		10,200		549,066
Dollar Tree, Inc. (b)		11,018		809,493
Genuine Parts Co.		9,000		605,970
McDonald's Corp.		11,700		1,934,595
Nordstrom, Inc. (a)		9,700		148,798
Ross Stores, Inc.		8,330		724,460
Target Corp.		28,800		2,677,536
Walgreens Boots Alliance, Inc.		55,000		2,516,250
Williams-Sonoma, Inc.		4,700		199,844
Yum! Brands, Inc.		12,557		860,531
				13,446,543
Textiles — 0.1%
Mohawk Industries, Inc. (b)		4,400		335,456
				28,796,500
Consumer, Non-cyclical — 21.8%
Agriculture — 1.7%
Altria Group, Inc.		10,600		409,902
Archer-Daniels-Midland Co.		34,500		1,213,710
Philip Morris International, Inc.		113,267		8,263,960
				9,887,572
Beverages — 0.1%
Molson Coors Beverage Co. Class B		8,400		327,684
PepsiCo, Inc.		2,700		324,270
				651,954
Biotechnology — 3.0%
Amgen, Inc.		36,900		7,480,737
Bio-Rad Laboratories, Inc. Class A (b)		1,500		525,840
Biogen, Inc. (b)		13,150		4,160,397
Gilead Sciences, Inc.		78,600		5,876,136
				18,043,110
Commercial Services — 0.3%
AMERCO		1,300		377,715
ManpowerGroup, Inc.		3,800		201,362
Quanta Services, Inc.		8,900		282,397
Robert Half International, Inc.		6,500		245,375
United Rentals, Inc. (b)		4,600		473,340
				1,580,189
Cosmetics & Personal Care — 0.1%
The Procter & Gamble Co.		8,000		880,000
Foods — 1.9%
Conagra Brands, Inc.		30,100		883,134
Ingredion, Inc.		4,300		324,650
The J.M. Smucker Co.		6,100		677,100
Kellogg Co.		21,200		1,271,788
The Kraft Heinz Co.		43,200		1,068,768
Mondelez International, Inc. Class A		7,700		385,616
Pilgrim's Pride Corp. (b)		8,800		159,456
Tyson Foods, Inc. Class A		111,013		6,424,322
				11,194,834
Health Care – Products — 3.1%
Boston Scientific Corp. (b)		62,074		2,025,475
Danaher Corp.		55,327		7,657,810
Envista Holdings Corp. (b)		42,004		627,540
Henry Schein, Inc. (b)		9,100		459,732
Medtronic PLC		7,714		695,648
Stryker Corp.		10,896		1,814,075
Thermo Fisher Scientific, Inc.		15,253		4,325,751
Zimmer Biomet Holdings, Inc.		7,764		784,785
				18,390,816
Health Care – Services — 2.5%
Anthem, Inc.		22,867		5,191,724
DaVita, Inc. (b)		8,600		654,116
HCA Healthcare, Inc.		33,600		3,018,960
Humana, Inc.		7,200		2,260,944
Laboratory Corp. of America Holdings (b)		6,000		758,340
Molina Healthcare, Inc. (b)		3,500		488,985
Quest Diagnostics, Inc.		8,400		674,520
UnitedHealth Group, Inc.		5,700		1,421,466
Universal Health Services, Inc. Class B		4,900		485,492
				14,954,547
Household Products & Wares — 0.1%
Avery Dennison Corp.		4,200		427,854
Pharmaceuticals — 9.0%
AbbVie, Inc.		61,334		4,673,038
AmerisourceBergen Corp.		12,800		1,132,800
Bausch Health Cos., Inc. (b)		13,378		207,359
Becton Dickinson and Co.		9,188		2,111,127
Cardinal Health, Inc.		18,200		872,508
CVS Health Corp.		7,100		421,243
Elanco Animal Health, Inc. (b)		66,842		1,496,592
Jazz Pharmaceuticals PLC (b)		3,600		359,064
Johnson & Johnson		163,400		21,426,642
McKesson Corp.		11,300		1,528,438
Merck & Co., Inc.		158,000		12,156,520
Perrigo Co. PLC		8,400		403,956
Pfizer, Inc.		196,300		6,407,232
				53,196,519
				129,207,395

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Energy — 4.0%
Oil & Gas — 3.0%
Cabot Oil & Gas Corp.		14,100	$	242,379
Chevron Corp.		132,100		9,571,966
ConocoPhillips		108,404		3,338,843
Continental Resources, Inc. (a)		37,327		285,178
EOG Resources, Inc.		32,354		1,162,156
Phillips 66		27,700		1,486,105
Suncor Energy, Inc.		44,600		704,680
Total SA Sponsored ADR		24,500		912,380
				17,703,687
Pipelines — 1.0%
Enbridge, Inc.		27,500		799,975
Kinder Morgan, Inc.		128,700		1,791,504
TC Energy Corp.		77,005		3,411,321
The Williams Cos., Inc.		12,710		179,847
				6,182,647
				23,886,334
Financial — 25.2%
Banks — 13.5%
Bank of America Corp.		726,540		15,424,444
The Bank of New York Mellon Corp.		57,000		1,919,760
Citigroup, Inc.		185,949		7,832,172
Citizens Financial Group, Inc.		27,000		507,870
Commerce Bancshares, Inc.		6,945		349,681
Cullen/Frost Bankers, Inc. (a)		3,600		200,844
Fifth Third Bancorp		76,836		1,141,014
The Goldman Sachs Group, Inc.		21,900		3,385,521
Huntington Bancshares, Inc.		63,900		524,619
JP Morgan Chase & Co.		222,959		20,072,999
KeyCorp		61,000		632,570
M&T Bank Corp.		8,100		837,783
Morgan Stanley		207,100		7,041,400
Northern Trust Corp.		13,000		980,980
The PNC Financial Services Group, Inc.		33,500		3,206,620
Regions Financial Corp.		59,900		537,303
Signature Bank		3,100		249,209
State Street Corp.		26,193		1,395,301
SVB Financial Group (b)		3,300		498,564
Truist Financial Corp.		6,200		191,208
US Bancorp		96,600		3,327,870
Wells Fargo & Co.		332,260		9,535,862
Western Alliance Bancorp		6,300		192,843
Zions Bancorp NA		10,600		283,656
				80,270,093
Diversified Financial Services — 3.6%
Ally Financial, Inc.		23,500		339,105
American Express Co.		50,800		4,348,988
Ameriprise Financial, Inc.		8,700		891,576
BlackRock, Inc.		9,700		4,267,709
Capital One Financial Corp.		28,900		1,457,138
The Charles Schwab Corp.		96,903		3,257,879
CME Group, Inc.		7,542		1,304,087
Credit Acceptance Corp. (a) (b)		1,200		306,828
E*TRADE Financial Corp.		32,698		1,122,196
Eaton Vance Corp.		6,900		222,525
Intercontinental Exchange, Inc.		9,700		783,275
LPL Financial Holdings, Inc.		4,900		266,707
Raymond James Financial, Inc.		8,600		543,520
SEI Investments Co.		7,600		352,184
T. Rowe Price Group, Inc.		14,500		1,415,925
The Western Union Co. (a)		24,600		445,998
				21,325,640
Insurance — 6.4%
Aflac, Inc.		45,600		1,561,344
Alleghany Corp.		1,000		552,350
The Allstate Corp.		20,200		1,852,946
American Financial Group, Inc.		9,100		637,728
American International Group, Inc.		188,344		4,567,342
Arch Capital Group Ltd. (b)		25,100		714,346
Assurant, Inc.		3,900		405,951
Chubb Ltd.		53,412		5,965,586
Cincinnati Financial Corp.		8,700		656,415
Equitable Holdings, Inc.		138,229		1,997,409
Everest Re Group Ltd.		2,300		442,566
Fidelity National Financial, Inc.		17,100		425,448
Globe Life, Inc.		14,500		1,043,565
The Hanover Insurance Group, Inc.		2,300		208,334
The Hartford Financial Services Group, Inc.		35,400		1,247,496
Loews Corp.		18,500		644,355
Markel Corp. (b)		890		825,822
Marsh & McLennan Cos., Inc.		21,090		1,823,442
MetLife, Inc.		98,700		3,017,259
Old Republic International Corp.		13,300		202,825
Principal Financial Group, Inc.		17,300		542,182
The Progressive Corp.		25,200		1,860,768
Prudential Financial, Inc.		24,900		1,298,286
The Travelers Cos., Inc.		32,800		3,258,680
Voya Financial, Inc. (a)		9,400		381,170
W.R. Berkley Corp.		9,800		511,266
Willis Towers Watson PLC		6,238		1,059,524
				37,704,405

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Real Estate — 0.1%
CBRE Group, Inc. Class A (b)		20,900	$	788,139
Real Estate Investment Trusts (REITS) — 1.6%
Digital Realty Trust, Inc. (a)		12,458		1,730,541
Prologis, Inc.		90,001		7,233,380
Weyerhaeuser Co.		18,256		309,439
				9,273,360
Savings & Loans — 0.0%
New York Community Bancorp, Inc. (a)		28,900		271,371
				149,633,008
Industrial — 11.4%
Aerospace & Defense — 2.4%
The Boeing Co.		6,200		924,668
General Dynamics Corp.		18,000		2,381,580
Lockheed Martin Corp.		17,500		5,931,625
Northrop Grumman Corp.		10,500		3,176,775
Raytheon Co.		13,500		1,770,525
				14,185,173
Building Materials — 0.3%
Fortune Brands Home & Security, Inc.		8,500		367,625
Johnson Controls International PLC		27,000		727,920
Masco Corp.		17,700		611,889
Owens Corning		6,700		260,027
				1,967,461
Electrical Components & Equipment — 0.3%
Emerson Electric Co.		32,900		1,567,685
Electronics — 1.3%
Agilent Technologies, Inc.		16,486		1,180,727
Arrow Electronics, Inc. (b)		5,000		259,350
Gentex Corp.		14,800		327,968
Honeywell International, Inc.		9,919		1,327,063
Hubbell, Inc.		3,500		401,590
Jabil, Inc.		8,700		213,846
Keysight Technologies, Inc. (b)		28,135		2,354,337
Roper Technologies, Inc.		3,536		1,102,560
Sensata Technologies Holding PLC (b)		9,900		286,407
				7,453,848
Engineering & Construction — 0.4%
AECOM (b)		9,200		274,620
Jacobs Engineering Group, Inc.		24,656		1,954,481
				2,229,101
Environmental Controls — 0.0%
Pentair PLC		9,600		285,696
Hand & Machine Tools — 0.3%
Lincoln Electric Holdings, Inc.		3,400		234,600
Snap-on, Inc.		3,500		380,870
Stanley Black & Decker, Inc.		8,900		890,000
				1,505,470
Machinery – Construction & Mining — 0.7%
Caterpillar, Inc.		35,200		4,084,608
Oshkosh Corp.		4,300		276,619
				4,361,227
Machinery – Diversified — 1.2%
AGCO Corp.		4,500		212,625
Curtiss-Wright Corp.		1,500		138,615
Deere & Co.		39,000		5,388,240
Dover Corp.		7,800		654,732
Rockwell Automation, Inc.		4,500		679,095
				7,073,307
Miscellaneous - Manufacturing — 1.9%
Carlisle Cos., Inc.		3,200		400,896
Eaton Corp. PLC		25,700		1,996,633
General Electric Co.		993,552		7,888,803
ITT, Inc.		5,000		226,800
Parker-Hannifin Corp.		8,000		1,037,840
				11,550,972
Packaging & Containers — 0.7%
Ball Corp.		400		25,864
Crown Holdings, Inc. (b)		8,400		487,536
Packaging Corp. of America		34,803		3,021,945
Sonoco Products Co.		4,900		227,115
WestRock Co.		11,400		322,164
				4,084,624
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		2,600		473,746
Transportation — 1.8%
C.H. Robinson Worldwide, Inc. (a)		7,900		522,980
CSX Corp.		48,200		2,761,860
Knight-Swift Transportation Holdings, Inc.		10,700		350,960
Norfolk Southern Corp.		9,998		1,459,708
Union Pacific Corp.		10,000		1,410,400
United Parcel Service, Inc. Class B		43,500		4,063,770
XPO Logistics, Inc. (b)		3,300		160,875
				10,730,553
				67,468,863
Technology — 14.2%
Computers — 1.5%
Cognizant Technology Solutions Corp. Class A		31,100		1,445,217
Hewlett Packard Enterprise Co.		80,000		776,800
International Business Machines Corp.		55,000		6,101,150
NetApp, Inc.		7,800		325,182
				8,648,349

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Office & Business Equipment — 0.0%
Xerox Holdings Corp. (b)		12,000	$	227,280
Semiconductors — 8.5%
Applied Materials, Inc.		128,830		5,902,991
ASML Holding NV		2,062		539,502
Broadcom, Inc.		29,163		6,914,547
Intel Corp.		289,900		15,689,388
Lam Research Corp.		7,400		1,776,000
Micron Technology, Inc. (b)		118,005		4,963,290
NVIDIA Corp.		5,000		1,318,000
NXP Semiconductor NV		35,003		2,902,799
ON Semiconductor Corp. (a) (b)		25,200		313,488
Qorvo, Inc. (b)		6,800		548,284
QUALCOMM, Inc.		81,637		5,522,743
Texas Instruments, Inc.		25,285		2,526,730
Xilinx, Inc.		19,200		1,496,448
				50,414,210
Software — 4.2%
CDK Global, Inc.		6,900		226,665
Electronic Arts, Inc. (b)		18,200		1,823,094
Fidelity National Information Services, Inc.		4,271		519,524
Microsoft Corp.		68,846		10,857,703
Oracle Corp.		202,000		9,762,660
Synopsys, Inc. (b)		13,393		1,724,884
				24,914,530
				84,204,369
Utilities — 5.7%
Electric — 5.6%
AES Corp.		37,700		512,720
Ameren Corp.		24,544		1,787,540
American Electric Power Co., Inc.		40,250		3,219,195
CenterPoint Energy, Inc.		67,200		1,038,240
Dominion Energy, Inc.		2,300		166,037
Edison International		51,533		2,823,493
Entergy Corp.		20,890		1,963,033
Evergy, Inc.		14,000		770,700
NextEra Energy, Inc.		42,593		10,248,728
NRG Energy, Inc.		15,600		425,256
OGE Energy Corp.		8,400		258,132
Pinnacle West Capital Corp.		6,400		485,056
Public Service Enterprise Group, Inc.		31,300		1,405,683
Sempra Energy		40,844		4,614,964
The Southern Co.		52,024		2,816,579
Vistra Energy Corp.		29,800		475,608
				33,010,964
Gas — 0.1%
NiSource, Inc.		31,158		778,015
				33,788,979
TOTAL COMMON STOCK                                                                                                     (Cost $656,805,835)				580,410,017
Preferred Stock — 0.6%
Consumer, Non-cyclical — 0.1%
Pharmaceuticals — 0.1%
Becton Dickinson and Co. Convertible 6.125%		9,400		491,432
Elanco Animal Health, Inc. Convertible 5.000% (a)		1,842		75,780
				567,212
				567,212
Industrial — 0.1%
Electronics — 0.1%
Fortive Corp. Convertible 5.000%		400		287,892
Technology — 0.1%
Semiconductors — 0.1%
Broadcom, Inc. Convertible 8.000% (a)		661		617,612
Utilities — 0.3%
Electric — 0.3%
Sempra Energy Convertible 6.000%		5,200		481,104
Sempra Energy Convertible 6.750%		2,700		253,611
The Southern Co. Convertible 6.750%		22,730		1,009,212
				1,743,927
				1,743,927
TOTAL PREFERRED STOCK                                                                                                     (Cost $3,710,140)				3,216,643
TOTAL EQUITIES (Cost $660,515,975)				583,626,660

	Principal Amount
Bonds & Notes — 0.0%
Corporate Debt — 0.0%
Oil & Gas — 0.0%
Occidental Petroleum Corp.
2.600% 8/13/21	$	105,000	82,561
TOTAL CORPORATE DEBT (Cost $69,300)			82,561
TOTAL BONDS & NOTES (Cost $69,300)			82,561

MML Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Mutual Funds — 1.0%
Diversified Financial Services — 1.0%
iShares Russell 1000 Value ETF (a)		38,139	$	3,782,626
State Street Navigator Securities Lending Prime Portfolio (c)		1,961,954		1,961,954
				5,744,580
TOTAL MUTUAL FUNDS
(Cost $6,698,675)				5,744,580
TOTAL LONG-TERM INVESTMENTS
(Cost $667,283,950)				589,453,801

		Principal Amount
Short-Term Investments — 0.6%
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated  3/31/20, 0.000%, due 4/01/20 (d)	$	3,582,538		3,582,538
TOTAL SHORT-TERM INVESTMENTS   (Cost $3,582,538)				3,582,538
TOTAL INVESTMENTS — 99.9% (Cost $670,866,488) (e)				593,036,339
Other Assets/(Liabilities) — 0.1%				801,712
NET ASSETS — 100.0%			$	593,838,051

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 March 31, 2020, was $5,199,675 or 0.88% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,416,625 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 $3,582,538. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $3,659,764.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MML Equity Rotation Fund — Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 97.6%
Common Stock — 97.6%
Basic Materials — 2.2%
Chemicals — 1.2%
Celanese Corp.		1,840	$	135,038
Eastman Chemical Co.		300		13,974
Ecolab, Inc.		565		88,044
LyondellBasell Industries NV Class A		153		7,593
The Mosaic Co.		728		7,877
Nutrien Ltd.		1,091		37,028
Olin Corp.		2,900		33,843
				323,397
Forest Products & Paper — 0.2%
Domtar Corp.		1,500		32,460
International Paper Co.		751		23,379
				55,839
Iron & Steel — 0.8%
Nucor Corp.		566		20,387
Reliance Steel & Aluminum Co.		2,226		194,976
				215,363
				594,599
Communications — 13.6%
Internet — 10.8%
Alphabet, Inc. Class A (a)		1,114		1,294,412
Alphabet, Inc. Class C (a)		124		144,188
Amazon.com, Inc. (a)		539		1,050,899
eBay, Inc.		7,616		228,937
Facebook, Inc. Class A (a)		520		86,736
Netflix, Inc. (a)		87		32,669
Palo Alto Networks, Inc. (a)		242		39,678
				2,877,519
Media — 1.2%
Comcast Corp. Class A		8,656		297,593
Discovery, Inc. Class A (a)		560		10,887
				308,480
Telecommunications — 1.6%
AT&T, Inc.		3,655		106,543
CenturyLink, Inc.		1,874		17,728
Cisco Systems, Inc.		3,696		145,290
Juniper Networks, Inc.		805		15,408
Verizon Communications, Inc.		2,818		151,411
				436,380
				3,622,379
Consumer, Cyclical — 8.0%
Airlines — 0.0%
American Airlines Group, Inc.		932		11,361
Apparel — 0.2%
Ralph Lauren Corp.		690		46,113
Auto Manufacturers — 2.8%
Cummins, Inc.		2,482		335,864
Ford Motor Co.		2,980		14,394
PACCAR, Inc.		5,908		361,156
Wabash National Corp.		3,800		27,436
				738,850
Auto Parts & Equipment — 0.6%
Magna International, Inc.		5,300		169,176
Distribution & Wholesale — 0.4%
Pool Corp.		600		118,062
Home Builders — 0.6%
Thor Industries, Inc. (b)		800		33,744
Toll Brothers, Inc.		5,926		114,075
				147,819
Leisure Time — 0.0%
Carnival Corp.		527		6,941
Lodging — 0.1%
Hilton Worldwide Holdings, Inc.		243		16,582
Retail — 3.3%
Costco Wholesale Corp.		110		31,364
Dollar Tree, Inc. (a)		471		34,604
Genuine Parts Co.		1,028		69,215
The Home Depot, Inc.		930		173,640
Lowe’s Cos., Inc.		326		28,052
McDonald’s Corp.		1,586		262,245
The Michaels Cos., Inc. (a) (b)		5,800		9,396
Target Corp.		999		92,877
Tractor Supply Co.		656		55,465
Walgreens Boots Alliance, Inc.		1,782		81,527
Yum! Brands, Inc.		388		26,590
				864,975
				2,119,879
Consumer, Non-cyclical — 16.8%
Beverages — 0.2%
Coca-Cola European Partners PLC		899		33,740
Molson Coors Beverage Co. Class B		427		16,657
				50,397

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Biotechnology — 1.0%
Amgen, Inc.		174	$	35,275
Biogen, Inc. (a)		320		101,242
Vertex Pharmaceuticals, Inc. (a)		520		123,734
				260,251
Commercial Services — 3.7%
Automatic Data Processing, Inc.		225		30,753
Global Payments, Inc.		1,279		184,470
IHS Markit Ltd.		204		12,240
ManpowerGroup, Inc.		2,155		114,194
PayPal Holdings, Inc. (a)		980		93,825
RELX PLC		4,717		100,944
Robert Half International, Inc.		1,083		40,883
S&P Global, Inc.		1,244		304,842
TrueBlue, Inc. (a)		2,400		30,624
Verisk Analytics, Inc.		588		81,955
				994,730
Cosmetics & Personal Care — 0.1%
Colgate-Palmolive Co.		248		16,457
Foods — 0.2%
The J.M. Smucker Co.		500		55,500
Pilgrim’s Pride Corp. (a)		496		8,988
				64,488
Health Care – Products — 1.2%
Abbott Laboratories		1,352		106,686
Danaher Corp.		967		133,842
Henry Schein, Inc. (a)		184		9,296
Medtronic PLC		132		11,904
Thermo Fisher Scientific, Inc.		191		54,168
				315,896
Health Care – Services — 1.2%
Anthem, Inc.		328		74,469
Centene Corp. (a)		314		18,655
HCA Healthcare, Inc.		107		9,614
Laboratory Corp. of America Holdings (a)		243		30,713
Quest Diagnostics, Inc.		595		47,778
UnitedHealth Group, Inc.		561		139,902
				321,131
Household Products & Wares — 0.1%
Quanex Building Products Corp.		2,900		29,232
Pharmaceuticals — 9.1%
AbbVie, Inc.		2,361		179,885
Allergan PLC		400		70,840
AmerisourceBergen Corp.		265		23,452
Bristol-Myers Squibb Co.		10,621		592,014
Cardinal Health, Inc.		374		17,930
Cigna Corp. (a)		300		53,154
CVS Health Corp.		884		52,448
Horizon Therapeutics PLC (a)		237		7,020
Jazz Pharmaceuticals PLC (a)		71		7,082
Johnson & Johnson		5,606		735,115
McKesson Corp.		3,077		416,195
Merck & Co., Inc.		1,927		148,263
Mylan NV (a)		1,618		24,124
Pfizer, Inc.		2,745		89,597
				2,417,119
				4,469,701
Energy — 1.5%
Oil & Gas — 1.1%
Chevron Corp.		1,929		139,775
Cimarex Energy Co.		490		8,247
Concho Resources, Inc.		385		16,497
Exxon Mobil Corp.		1,878		71,308
Occidental Petroleum Corp.		514		5,952
Phillips 66		948		50,860
				292,639
Oil & Gas Services — 0.3%
Schlumberger Ltd.		6,671		89,992
Pipelines — 0.1%
Kinder Morgan, Inc.		1,993		27,743
				410,374
Financial — 15.9%
Banks — 8.7%
Bank of America Corp.		25,300		537,119
CIT Group, Inc.		600		10,356
Citigroup, Inc.		14,700		619,164
The Goldman Sachs Group, Inc.		2,060		318,456
JP Morgan Chase & Co.		7,200		648,216
KeyCorp		17,863		185,239
				2,318,550
Diversified Financial Services — 5.4%
AerCap Holdings NV (a)		2,000		45,580
Capital One Financial Corp.		504		25,411
Discover Financial Services		400		14,268
Mastercard, Inc. Class A		1,155		279,002
SEI Investments Co.		2,300		106,582
Synchrony Financial		5,400		86,886
Visa, Inc. Class A		5,460		879,715
				1,437,444

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Insurance — 1.8%
Aflac, Inc.		3,600	$	123,264
Berkshire Hathaway, Inc. Class B (a)		1,900		347,377
				470,641
				4,226,635
Industrial — 7.4%
Aerospace & Defense — 0.6%
Barnes Group, Inc.		900		37,647
Lockheed Martin Corp.		147		49,826
Raytheon Technologies Corp.		635		59,899
Spirit AeroSystems Holdings, Inc. Class A		172		4,116
				151,488
Building Materials — 0.1%
Patrick Industries, Inc.		1,100		30,976
Electrical Components & Equipment — 0.1%
AMETEK, Inc.		140		10,083
Electronics — 2.8%
Allegion PLC		3,295		303,206
Amphenol Corp. Class A		237		17,273
Garmin Ltd.		212		15,891
Honeywell International, Inc.		1,320		176,603
Keysight Technologies, Inc. (a)		1,270		106,274
Sensata Technologies Holding PLC (a)		954		27,599
TE Connectivity Ltd.		838		52,777
TTM Technologies, Inc. (a)		4,400		45,496
				745,119
Engineering & Construction — 0.4%
AECOM (a)		957		28,567
Arcosa, Inc.		2,083		82,778
				111,345
Environmental Controls — 0.5%
Republic Services, Inc.		754		56,595
Waste Management, Inc.		895		82,841
				139,436
Machinery – Diversified — 0.9%
AGCO Corp.		4,400		207,900
Dover Corp.		307		25,770
Ingersoll Rand, Inc. (a)		420		10,416
				244,086
Miscellaneous - Manufacturing — 0.7%
3M Co.		158		21,569
Eaton Corp. PLC		1,193		92,684
General Electric Co.		2,143		17,015
Parker-Hannifin Corp.		73		9,470
Trane Technologies PLC		476		39,313
				180,051
Shipbuilding — 0.2%
Huntington Ingalls Industries, Inc.		246		44,824
Transportation — 1.1%
Kansas City Southern		280		35,610
Norfolk Southern Corp.		1,800		262,800
				298,410
				1,955,818
Technology — 32.2%
Computers — 11.7%
Accenture PLC Class A		158		25,795
Apple, Inc.		9,220		2,344,554
Cognizant Technology Solutions Corp. Class A		2,025		94,102
Fortinet, Inc. (a)		960		97,123
HP, Inc.		803		13,940
International Business Machines Corp.		1,246		138,219
Leidos Holdings, Inc.		1,560		142,974
Seagate Technology PLC		5,006		244,293
				3,101,000
Semiconductors — 10.1%
Advanced Micro Devices, Inc. (a)		751		34,156
Applied Materials, Inc.		2,244		102,820
ASML Holding NV		810		211,928
Broadcom, Inc.		2,798		663,406
Intel Corp.		9,662		522,907
KLA Corp.		680		97,743
Lam Research Corp.		1,145		274,800
Micron Technology, Inc. (a)		9,400		395,364
NVIDIA Corp.		670		176,612
Skyworks Solutions, Inc.		900		80,442
Texas Instruments, Inc.		176		17,588
Xilinx, Inc.		1,510		117,689
				2,695,455

MML Equity Rotation Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Software — 10.4%
ANSYS, Inc. (a)		281	$	65,324
Citrix Systems, Inc.		259		36,661
Fair Isaac Corp. (a)		330		101,538
j2 Global, Inc.		500		37,425
Microsoft Corp.		12,722		2,006,387
MSCI, Inc.		760		219,609
Oracle Corp.		421		20,347
Paychex, Inc.		641		40,332
Veeva Systems, Inc. Class A (a)		706		110,397
VMware, Inc. Class A (a)		1,038		125,702
				2,763,722
				8,560,177
TOTAL COMMON STOCK (Cost $27,874,754)				25,959,562
TOTAL EQUITIES (Cost $27,874,754)				25,959,562
Rights — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Bristol-Myers Squibb Co., Expires 03/31/21 (a)		993		3,773
TOTAL RIGHTS (Cost $2,115)				3,773
TOTAL LONG-TERM INVESTMENTS (Cost $27,876,869)				25,963,335

	Principal Amount
Short-Term Investments — 2.1%
Repurchase Agreement — 2.1%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (c)	$	546,787		546,787
TOTAL SHORT-TERM INVESTMENTS (Cost $546,787)				546,787
TOTAL INVESTMENTS — 99.7% (Cost $28,423,656) (d)				26,510,122
Other Assets/(Liabilities) — 0.3%				77,071
NET ASSETS — 100.0%			$	26,587,193

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.
(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $42,709 or 0.16% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $43,887 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 $546,787. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $560,645.
(d)	See Note 3 for aggregate cost for federal tax purposes.

MML High Yield Fund — Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 0.5%
Common Stock — 0.5%
Basic Materials — 0.0%
Forest Products & Paper — 0.0%
Appvion Inc. (Escrow Shares) (a) (b) (c)		2,157,000	$	—
Consumer, Non-cyclical — 0.3%
Agriculture — 0.3%
Pinnacle Operating Corp. (b) (c)		378,620		340,758
Pinnacle Operating Corp. (b) (c)		178,174		—
				340,758
				340,758
Energy — 0.2%
Oil & Gas — 0.2%
Fieldwood Energy LLC (c)		3,193		3,193
Fieldwood Energy LLC (c)		13,011		13,011
Jupiter Resources, Inc. (c)		191,606		191,606
				207,810
TOTAL COMMON STOCK (Cost $3,815,845)				548,568
Preferred Stock — 0.0%
Consumer, Non-cyclical — 0.0%
Agriculture — 0.0%
Pinnacle Agriculture Holdings LLC (b) (c)		1		—
TOTAL PREFERRED STOCK (Cost $1)				—
TOTAL EQUITIES (Cost $3,815,846)				548,568

		Principal Amount
Bonds & Notes — 97.3%
Bank Loans — 5.2%
Aerospace & Defense — 0.6%
Veritas Bermuda Ltd., USD Repriced Term Loan B, 3 mo. LIBOR + 4.500%  5.950% VRN 1/27/23	$	740,458	629,388
Electronics — 0.7%
Vertafore, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.250%  4.239% VRN 7/02/25		938,125	821,713
Oil & Gas — 0.3%
Fieldwood Energy LLC
Exit 1st Lien Term Loan, 3 mo. LIBOR + 5.250%  7.027% VRN 4/11/22		1,074,554	335,798
Exit 2nd Lien Term Loan, 3 mo. LIBOR + 7.250%  9.027% VRN 4/11/23		387,384	24,793
			360,591
Packaging & Containers — 2.0%
BWAY Holding Co., 2017 Term Loan B, 3 mo. LIBOR + 3.250%  5.084% VRN 4/03/24		1,190,617	965,150
Consolidated Energy Finance, SA, Term Loan B, 3 mo. LIBOR + 2.500%  3.205% VRN 5/07/25		888,004	621,603
Flex Acquisition Co., Inc., 1st Lien Term Loan, 3 mo. LIBOR + 3.000%  4.909% VRN 12/29/23		550,385	498,099
Trident TPI Holdings, Inc., 2017 USD Term Loan B1, 3 mo. LIBOR + 3.250%  4.323% VRN 10/17/24		162,553	133,293
			2,218,145
Software — 1.6%
Almonde, Inc.
USD 1st Lien Term Loan, 3 mo. LIBOR + 3.500%  5.277% VRN 6/13/24		745,972	634,076
USD 2nd Lien Term Loan, 3 mo. LIBOR + 7.250%  9.027% VRN 6/13/25		700,000	519,400
Banff Merger Sub, Inc., 2018 USD Term Loan B, 1 mo. LIBOR + 4.250%  5.239% VRN 10/02/25		674,556	556,678
			1,710,154
TOTAL BANK LOANS (Cost $7,597,563)			5,739,991
Corporate Debt — 92.1%
Advertising — 0.3%
Terrier Media Buyer, Inc. 8.875% 12/15/27 (d)		371,000	313,495
Aerospace & Defense — 3.2%
Signature Aviation US Holdings, Inc. 4.000% 3/01/28 (d)		651,000	587,723
TransDigm, Inc. 5.500% 11/15/27 (d)		963,000	864,292
6.375% 6/15/26		654,000	626,205
Triumph Group, Inc. 5.250% 6/01/22		305,000	251,625
6.250% 9/15/24 (d)		306,000	272,741
7.750% 8/15/25 (e)		1,243,000	901,175
			3,503,761

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Agriculture — 0.4%
JBS Investments II GmbH  7.000% 1/15/26 (d)	$	390,000	$	388,666
Airlines — 1.3%
American Airlines Group, Inc.  5.000% 6/01/22 (d)		547,000		438,967
3.750% 3/01/25 (d)		1,437,000		1,005,900
				1,444,867
Apparel — 0.1%
Hanesbrands, Inc.  4.875% 5/15/26 (d)		126,000		123,494
Auto Manufacturers — 2.7%
Allison Transmission, Inc.  4.750% 10/01/27 (d)		589,000		541,880
Ford Motor Credit Co. LLC  3.087% 1/09/23		200,000		184,000
3.664% 9/08/24		200,000		180,000
4.134% 8/04/25		200,000		177,400
4.389% 1/08/26		600,000		525,000
4.542% 8/01/26		1,039,000		909,125
5.596% 1/07/22		200,000		193,500
5.875% 8/02/21		281,000		275,380
				2,986,285
Auto Parts & Equipment — 0.3%
Panther BF Aggregator 2 LP / Panther Finance Co., Inc.  8.500% 5/15/27 (d)		396,000		345,470
Building Materials — 2.4%
Griffon Corp.  5.750% 3/01/28 (d)		417,000		391,980
James Hardie International Finance DAC  4.750% 1/15/25 (d)		126,000		118,756
5.000% 1/15/28 (d)		485,000		458,325
PGT Innovations, Inc.  6.750% 8/01/26 (d)		368,000		352,360
Standard Industries, Inc.  4.750% 1/15/28 (d)		1,471,000		1,354,718
				2,676,139
Chemicals — 1.7%
CF Industries, Inc.  4.950% 6/01/43		63,000		59,831
5.375% 3/15/44		240,000		228,607
Consolidated Energy Finance SA  6.875% 6/15/25 (d)		915,000		791,475
CVR Partners LP/CVR Nitrogen Finance Corp.  9.250% 6/15/23 (d)		650,000		521,105
Valvoline, Inc.  4.250% 2/15/30 (d)		304,000		284,970
				1,885,988
Coal — 2.2%
Alliance Resource Operating Partners LP/Alliance Resource Finance Corp.  7.500% 5/01/25 (d) (e)		451,000		270,600
Peabody Energy Corp.  6.000% 3/31/22 (d)		1,383,000		940,440
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp.  7.500% 6/15/25 (d)		1,013,000		729,360
Warrior Met Coal, Inc.  8.000% 11/01/24 (d)		534,000		443,220
				2,383,620
Commercial Services — 1.8%
Allied Universal Holdco LLC / Allied Universal Finance Corp.  6.625% 7/15/26 (d)		241,000		236,782
Avis Budget Car Rental LLC / Avis Budget Finance, Inc.  5.750% 7/15/27 (d)		126,000		100,183
Korn Ferry  4.625% 12/15/27 (d)		162,000		140,738
Prime Security Services Borrower LLC / Prime Finance, Inc.  6.250% 1/15/28 (d)		802,000		691,725
Service Corp. International  5.125% 6/01/29		360,000		367,200
The Hertz Corp.  6.000% 1/15/28 (d)		692,000		363,300
United Rentals North America, Inc.  4.000% 7/15/30		126,000		112,770
				2,012,698
Computers — 1.5%
Banff Merger Sub, Inc.  9.750% 9/01/26 (d)		466,000		410,080
Dell International LLC/EMC Corp.  7.125% 6/15/24 (d)		904,000		933,380
Science Applications International Corp.  4.875% 4/01/28 (d)		189,000		181,440
Western Digital Corp.  4.750% 2/15/26		104,000		105,560
				1,630,460
Distribution & Wholesale — 0.8%
Resideo Funding, Inc.  6.125% 11/01/26 (d)		800,000		698,000
Univar Solutions USA, Inc.  5.125% 12/01/27 (d)		254,000		231,140
				929,140
Diversified Financial Services — 2.4%
Alliance Data Systems Corp.  4.750% 12/15/24 (d)		767,000		582,920
Global Aircraft Leasing Co. Ltd.  6.500% 9/15/24 (d)		1,829,000		1,177,876
LPL Holdings, Inc.  4.625% 11/15/27 (d)		433,000		396,030
Springleaf Finance Corp.  5.375% 11/15/29		552,000		505,080
				2,661,906

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Electric — 2.4%
Calpine Corp. 4.500% 2/15/28 (d)	$	631,000	$	611,597
NRG Energy, Inc. 5.250% 6/15/29 (d)		374,000		385,220
6.625% 1/15/27		702,000		730,080
Vistra Operations Co. LLC  3.550% 7/15/24 (d)		470,000		441,723
4.300% 7/15/29 (d)		568,000		503,595
				2,672,215
Electrical Components & Equipment — 0.4%
Energizer Holdings, Inc.  7.750% 1/15/27 (d)		387,000		400,042
Entertainment — 0.5%
Banijay Entertainment SASU  5.375% 3/01/25 (d)		241,000		220,515
Live Nation Entertainment, Inc.  4.750% 10/15/27 (d)		407,000		362,230
				582,745
Environmental Controls — 0.1%
Clean Harbors, Inc.  4.875% 7/15/27 (d)		136,000		133,130
Foods — 6.1%
Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertson’s LLC  4.875% 2/15/30 (d)		165,000		164,588
5.875% 2/15/28 (d)		255,000		259,539
7.500% 3/15/26 (d)		362,000		390,164
JBS USA LUX SA/JBS USA Finance, Inc.  5.875% 7/15/24 (d)		646,000		654,075
6.500% 4/15/29 (d)		1,094,000		1,173,534
6.750% 2/15/28 (d)		824,000		879,620
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.  5.500% 1/15/30 (d)		826,000		852,845
Kraft Heinz Foods Co.  3.750% 4/01/30 (d)		126,000		119,762
3.950% 7/15/25		306,000		304,527
5.200% 7/15/45		178,000		171,128
6.500% 2/09/40		94,000		102,570
6.875% 1/26/39		206,000		235,628
Pilgrim’s Pride Corp.  5.750% 3/15/25 (d)		247,000		248,852
5.875% 9/30/27 (d)		398,000		396,567
Post Holdings, Inc.  4.625% 4/15/30 (d)		381,000		364,807
Simmons Foods, Inc.  7.750% 1/15/24 (d)		189,000		189,000
Smithfield Foods, Inc.  5.200% 4/01/29 (d)		264,000		265,506
				6,772,712
Hand & Machine Tools — 0.7%
Apex Tool Group LLC/BC Mountain Finance, Inc.  9.000% 2/15/23 (d)		1,138,000		739,700
Health Care – Products — 2.4%
Avanos Medical, Inc.  6.250% 10/15/22		1,300,000		1,277,250
Avantor, Inc.  6.000% 10/01/24 (d)		58,000		60,766
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA  7.250% 2/01/28 (d)		872,000		749,833
Ortho-Clinical Diagnostics, Inc./Ortho-Clinical Diagnostics SA  6.625% 5/15/22 (d)		643,000		607,635
				2,695,484
Health Care – Services — 5.7%
Centene Corp.  4.250% 12/15/27 (d)		402,000		393,960
4.625% 12/15/29 (d)		918,000		922,590
5.250% 4/01/25 (d)		71,000		71,355
5.375% 6/01/26 (d)		52,000		53,566
Envision Healthcare Corp.  8.750% 10/15/26 (d)		1,158,000		283,710
HCA, Inc.  3.500% 9/01/30		1,478,000		1,340,859
5.875% 2/15/26		568,000		597,820
LifePoint Health, Inc.  4.375% 2/15/27 (d)		224,000		211,008
Radiology Partners, Inc.  9.250% 2/01/28 (d)		300,000		259,725
Tenet Healthcare Corp.  4.625% 7/15/24		400,000		382,000
4.625% 9/01/24 (d)		323,000		309,369
4.875% 1/01/26 (d)		750,000		714,375
5.125% 11/01/27 (d)		500,000		476,250
8.125% 4/01/22		340,000		323,850
				6,340,437
Home Builders — 1.3%
Brookfield Residential Properties, Inc.  6.375% 5/15/25 (d)		491,000		441,900
Brookfield Residential Properties, Inc. / Brookfield Residential US Corp.  4.875% 2/15/30 (d)		261,000		198,282
M/I Homes, Inc.  4.950% 2/01/28 (d)		368,000		312,340
Mattamy Group Corp.  4.625% 3/01/30 (d)		518,000		445,480
				1,398,002

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Housewares — 0.4%
Newell Brands, Inc.  4.200% 4/01/26	$	337,000	$	330,866
5.625% 4/01/36		126,000		124,909
				455,775
Insurance — 1.0%
Acrisure LLC/Acrisure Finance, Inc.  7.000% 11/15/25 (d)		691,000		594,260
8.125% 2/15/24 (d)		509,000		495,791
				1,090,051
Internet — 1.4%
Netflix, Inc.  4.875% 6/15/30 (d)		321,000		325,863
5.375% 11/15/29 (d)		523,000		542,691
5.875% 11/15/28		595,000		635,758
				1,504,312
Investment Companies — 0.6%
Icahn Enterprises LP/Icahn Enterprises Finance Corp.  6.375% 12/15/25		761,000		719,145
Leisure Time — 1.7%
Brunswick Corp.  7.375% 9/01/23		285,000		342,282
7.125% 8/01/27		569,000		713,739
Carlson Travel, Inc.  6.750% 12/15/23 (d)		296,000		201,280
9.500% 12/15/24 (d) (e)		988,000		652,080
				1,909,381
Lodging — 1.1%
Wynn Las Vegas LLC/Wynn Las Vegas Capital Corp.  5.250% 5/15/27 (d)		385,000		348,425
5.500% 3/01/25 (d)		740,000		688,200
Wynn Macau Ltd.  5.125% 12/15/29 (d)		268,000		225,120
				1,261,745
Media — 10.9%
Altice Financing SA  5.000% 1/15/28 (d)		316,000		279,660
Block Communications, Inc.  4.875% 3/01/28 (d)		340,000		316,200
CCO Holdings LLC/CCO Holdings Capital Corp.  4.500% 8/15/30 (d)		702,000		687,960
4.500% 5/01/32 (d)		647,000		630,954
4.750% 3/01/30 (d)		236,000		234,820
5.125% 5/01/27 (d)		423,000		424,100
5.750% 2/15/26 (d)		550,000		556,957
5.875% 5/01/27 (d)		822,000		846,660
Clear Channel Worldwide Holdings, Inc.  5.125% 8/15/27 (d)		391,000		369,984
9.250% 2/15/24 (d)		213,000		182,648
CSC Holdings LLC  5.750% 1/15/30 (d)		767,000		773,489
6.625% 10/15/25 (d)		50,000		52,566
7.500% 4/01/28 (d)		565,000		601,962
Diamond Sports Group LLC/Diamond Sports Finance Co.  5.375% 8/15/26 (d)		178,000		144,629
DISH DBS Corp.  5.000% 3/15/23		207,000		198,058
7.750% 7/01/26		681,000		699,727
DISH Network Corp.  3.375% 8/15/26		368,000		298,761
LCPR Senior Secured Financing DAC  6.750% 10/15/27 (d)		314,000		309,290
Midcontinent Communications / Midcontinent Finance Corp.  5.375% 8/15/27 (d)		205,000		198,484
Sirius XM Radio, Inc.  4.625% 7/15/24 (d)		671,000		681,018
5.375% 4/15/25 (d)		522,000		527,215
5.375% 7/15/26 (d)		167,000		170,323
5.500% 7/01/29 (d)		636,000		648,720
TEGNA, Inc.  4.625% 3/15/28 (d)		447,000		392,801
Virgin Media Secured Finance PLC  5.500% 5/15/29 (d)		1,308,000		1,303,291
Ziggo BV  4.875% 1/15/30 (d)		153,000		149,012
5.500% 1/15/27 (d)		440,000		440,000
				12,119,289
Mining — 4.3%
Compass Minerals International, Inc.  4.875% 7/15/24 (d)		294,000		276,360
6.750% 12/01/27 (d)		350,000		315,962
First Quantum Minerals Ltd.  7.250% 4/01/23 (d)		659,000		554,796
7.500% 4/01/25 (d)		647,000		538,427
Freeport-McMoRan, Inc.  4.125% 3/01/28		151,000		131,748
Kinross Gold Corp.  4.500% 7/15/27		640,000		602,374
5.950% 3/15/24		441,000		445,410
6.875% 9/01/41		476,000		476,000
New Gold, Inc.  6.250% 11/15/22 (d)		657,000		638,111
Northwest Acquisitions ULC/Dominion Finco, Inc.  7.125% 11/01/22 (d)		884,000		433,160
Novelis Corp.  4.750% 1/30/30 (d)		417,000		371,130
				4,783,478
Miscellaneous - Manufacturing — 1.1%
Amsted Industries, Inc.  5.625% 7/01/27 (d)		617,000		600,289
Gates Global LLC / Gates Corp.  6.250% 1/15/26 (d)		700,000		619,500
				1,219,789

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Office Equipment/Supplies — 0.6%
Xerox Corp.  4.125% 3/15/23	$	662,000	$	658,028
Oil & Gas — 4.3%
Antero Resources Corp.  5.375% 11/01/21		410,000		298,275
Calumet Specialty Products Partners LP/Calumet Finance Corp.  7.625% 1/15/22		578,000		447,950
CVR Energy, Inc.  5.750% 2/15/28 (d)		1,323,000		988,943
Hilcorp Energy I LP / Hilcorp Finance Co.  6.250% 11/01/28 (d)		163,000		71,720
Hilcorp Energy I LP/Hilcorp Finance Co.  5.000% 12/01/24 (d)		39,000		17,940
Jonah Energy LLC/Jonah Energy Finance Corp.  7.250% 10/15/25 (d)		745,000		33,525
Jupiter Resources Inc.  10.000% 1/31/24 (a) (b)		231,906		231,906
Laredo Petroleum, Inc.  9.500% 1/15/25		268,000		107,200
10.125% 1/15/28		330,000		125,400
MEG Energy Corp.  7.125% 2/01/27 (d)		379,000		187,271
Nabors Industries Ltd.  7.250% 1/15/26 (d)		184,000		62,560
7.500% 1/15/28 (d)		119,000		38,080
Neptune Energy Bondco PLC  6.625% 5/15/25 (d)		594,000		332,640
Occidental Petroleum Corp.  2.600% 4/15/22		76,000		54,712
2.700% 8/15/22		178,000		126,922
2.700% 2/15/23		71,000		42,047
2.900% 8/15/24		93,000		50,901
3 mo. USD LIBOR + 1.450% 3.142% FRN 8/15/22		93,000		62,325
4.100% 2/01/21		397,000		337,444
6.950% 7/01/24		88,000		49,480
Parkland Fuel Corp.  5.875% 7/15/27 (d)		247,000		231,538
PBF Holding Co. LLC / PBF Finance Corp.  6.000% 2/15/28 (d)		1,043,000		688,380
Tullow Oil PLC  6.250% 4/15/22 (d)		639,000		158,153
				4,745,312
Oil & Gas Services — 0.6%
Welltec A/S  9.500% 12/01/22 (d)		696,000		654,240
Packaging & Containers — 1.6%
Graphic Packaging International LLC  3.500% 3/15/28 (d)		470,000		422,859
Mauser Packaging Solutions Holding Co.  7.250% 4/15/25 (d)		781,000		620,895
Silgan Holdings, Inc.  4.125% 2/01/28 (d)		422,000		389,295
Trident TPI Holdings, Inc.  9.250% 8/01/24 (d)		386,000		320,380
				1,753,429
Pharmaceuticals — 2.0%
Bausch Health Americas, Inc.  8.500% 1/31/27 (d)		250,000		261,250
9.250% 4/01/26 (d)		600,000		634,080
Bausch Health Cos., Inc.  5.000% 1/30/28 (d)		193,000		182,713
5.250% 1/30/30 (d)		320,000		302,579
5.500% 3/01/23 (d)		140,000		137,200
5.875% 5/15/23 (d)		11,000		10,945
6.125% 4/15/25 (d)		75,000		73,875
Par Pharmaceutical, Inc.  7.500% 4/01/27 (d)		629,000		625,855
				2,228,497
Pipelines — 1.5%
Cheniere Energy Partners LP  4.500% 10/01/29 (d)		271,000		235,770
5.625% 10/01/26		725,000		667,000
Genesis Energy LP/Genesis Energy Finance Corp.  6.000% 5/15/23		765,000		554,893
6.500% 10/01/25		356,000		257,317
				1,714,980
Real Estate Investment Trusts (REITS) — 1.6%
ESH Hospitality, Inc.  4.625% 10/01/27 (d)		388,000		302,640
MPT Operating Partnership LP/MPT Finance Corp.  5.000% 10/15/27		539,000		522,830
RHP Hotel Properties LP/RHP Finance Corp.  5.000% 4/15/23		789,000		615,420
Ryman Hospitality Properties, Inc.  4.750% 10/15/27 (d)		425,000		318,750
				1,759,640
Retail — 1.3%
Asbury Automotive Group, Inc.  4.500% 3/01/28 (d)		152,000		129,200
Golden Nugget, Inc.  8.750% 10/01/25 (d)		151,000		77,010
KGA Escrow LLC  7.500% 8/15/23 (d)		403,000		366,730
Penske Automotive Group, Inc.  5.500% 5/15/26		1,000,000		912,200
				1,485,140

MML High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Software — 3.3%
Open Text Corp.  3.875% 2/15/28 (d)	$	302,000	$	283,880
Open Text Holdings, Inc.  4.125% 2/15/30 (d)		313,000		294,298
RP Crown Parent LLC  7.375% 10/15/24 (d)		191,000		181,985
Solera LLC/ Solera Finance, Inc.  10.500% 3/01/24 (d)		115,000		112,700
SS&C Technologies, Inc.  5.500% 9/30/27 (d)		960,000		1,000,522
Veritas US, Inc./Veritas Bermuda Ltd.  10.500% 2/01/24 (d) (e)		2,167,000		1,825,697
				3,699,082
Storage & Warehousing — 0.9%
LBC Tank Terminals Holding Netherlands BV  6.875% 5/15/23 (d)		1,111,000		1,041,563
Telecommunications — 7.4%
CenturyLink, Inc.  5.125% 12/15/26 (d)		526,000		526,000
6.750% 12/01/23		500,000		531,400
CommScope Technologies Finance LLC  6.000% 6/15/25 (d)		129,000		118,061
CommScope Technologies LLC  5.000% 3/15/27 (d)		271,000		235,093
CommScope, Inc.  6.000% 3/01/26 (d)		162,000		161,757
8.250% 3/01/27 (d)		565,000		544,603
Hughes Satellite Systems Corp.  6.625% 8/01/26		687,000		695,873
Intelsat Jackson Holdings SA  8.500% 10/15/24 (d)		564,000		355,151
Sprint Capital Corp.  8.750% 3/15/32		126,000		166,635
Sprint Corp.  7.250% 9/15/21		745,000		767,871
7.625% 3/01/26		386,000		436,875
7.875% 9/15/23		1,386,000		1,521,246
T-Mobile USA, Inc.  6.000% 4/15/24		453,000		461,833
6.500% 1/15/26		679,000		712,950
Telecom Italia Capital  6.000% 9/30/34		150,000		148,500
Telecom Italia SpA  5.303% 5/30/24 (d)		586,000		588,965
ViaSat, Inc.  5.625% 4/15/27 (d)		197,000		194,538
				8,167,351
Toys, Games & Hobbies — 0.7%
Mattel, Inc.  6.750% 12/31/25 (d)		516,000		524,721
5.875% 12/15/27 (d)		224,000		230,227
				754,948
Transportation — 3.1%
Kenan Advantage Group, Inc.  7.875% 7/31/23 (d) (e)		3,200,000		2,686,000
XPO Logistics, Inc.  6.750% 8/15/24 (d)		716,000		700,105
				3,386,105
TOTAL CORPORATE DEBT (Cost $115,317,994)				102,131,736
TOTAL BONDS & NOTES (Cost $122,915,557)				107,871,727

	Number of Shares
Warrants — 0.0%
Basic Materials — 0.0%
Forest Products & Paper — 0.0%
Appvion Holding Corp. Tranche A (a) (b)	2,106		263
Appvion Holding Corp. Tranche B (a) (b)	2,106		—
			263
TOTAL WARRANTS (Cost $0)			263
Mutual Funds — 4.1%
Diversified Financial Services — 4.1%
State Street Navigator Securities Lending Prime Portfolio (f)	4,597,363		4,597,363
TOTAL MUTUAL FUNDS (Cost $4,597,363)			4,597,363
TOTAL LONG-TERM INVESTMENTS (Cost $131,328,766)			113,017,921
TOTAL INVESTMENTS — 101.9% (Cost $131,328,766) (g)			113,017,921
Other Assets/(Liabilities) — (1.9)%			(2,098,709	)
NET ASSETS — 100.0%		$	110,919,212

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)	Investment was valued using significant unobservable inputs.
(b)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2020, these securities amounted to a value of $572,927 or 0.52% of net assets.
(c)	Non-income producing security.
(d)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2020, the aggregate market value of these securities amounted to $73,779,356 or 66.52% of net assets.
(e)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $5,622,924 or 5.07% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $1,106,107 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).
(f)	Represents investment of security lending cash collateral. (Note 2).
(g)	See Note 3 for aggregate cost for federal tax purposes.

Currency Legend

USD U.S. Dollar

MML Inflation-Protected and Income Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 83.0%
Corporate Debt — 1.1%
Pharmaceuticals — 0.5%
Becton Dickinson and Co. 3 mo. USD LIBOR + 0.875%
2.250% FRN 12/29/20	$	1,545,000	$	1,492,856
Real Estate Investment Trusts (REITS) — 0.6%
SBA Tower Trust
3.156% 10/10/45 (a)		2,000,000		1,997,058
TOTAL CORPORATE DEBT (Cost $3,094,709)				3,489,914
Municipal Obligations — 0.0%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR + 0.000%
2.694% FRN 4/26/27		41,983		41,972
TOTAL MUNICIPAL OBLIGATIONS (Cost $41,984)				41,972
Non-U.S. Government Agency Obligations — 59.9%
Auto Floor Plan ABS — 1.1%
Navistar Financial Dealer Note Master Owner Trust II, Series 2019-1, Class B, 1 mo. USD LIBOR + 0.750%
1.697% FRN 5/25/24  (a)		1,400,000		1,372,680
NextGear Floorplan Master Owner Trust, Series 2017-2A, Class A1, 1 mo. USD LIBOR + 0.680%
1.385% FRN 10/17/22  (a)		2,000,000		1,895,515
				3,268,195
Automobile ABS — 11.8%
American Credit Acceptance Receivables Trust
Series 2017-4, Class C, 2.940% 1/10/24  (a)		321,883		321,880
Series 2019-1, Class C, 3.500% 4/14/25  (a)		1,300,000		1,282,431
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (a)		388,000		382,447
Chesapeake Funding II LLC, Series 2018-1A, Class A2, 1 mo. USD LIBOR + 0.450%
1.155% FRN 4/15/30  (a)		605,124		587,833
CPS Auto Trust
Series 2019-A, Class A, 3.180% 6/15/22  (a)		123,132		120,376
Series 2018-C, Class B, 3.430% 7/15/22  (a)		240,561		235,225
Drive Auto Receivables Trust, Series 2019-1, Class C
3.780% 4/15/25		963,000		947,347
Exeter Automobile Receivables Trust
Series 2019-3A, Class A, 2.590% 9/15/22  (a)		484,509		481,587
Series 2019-1A, Class B, 3.450% 2/15/23  (a)		435,000		427,057
Flagship Credit Auto Trust
Series 2017-4, Class A, 2.070% 4/15/22  (a)		170,557		167,877
Series 2018-1, Class A, 2.590% 6/15/22  (a)		310,911		306,056
Series 2016-4, Class C, 2.710% 11/15/22  (a)		561,745		553,546
Series 2017-1, Class B, 2.830% 3/15/23  (a)		40,116		40,116
Series 2018-2, Class A, 2.970% 10/17/22  (a)		860,753		849,818
Hertz Fleet Lease Funding LP, Series 2018-1, Class A1, 1 mo. USD LIBOR + 0.500%
1.363% FRN 5/10/32  (a)		1,758,670		1,727,744
Hertz Vehicle Financing II LP
Series 2017-1A, Class B, 3.560% 10/25/21  (a)		2,530,000		2,452,854
Series 2016-2A, Class D, 5.970% 3/25/22  (a)		3,300,000		3,324,158
OneMain Direct Auto Receivables Trust
Series 2017-2A, Class C, 2.820% 7/15/24  (a)		8,490,000		8,347,625
Series 2017-2A, Class E, 4.740% 11/14/25  (a)		968,000		956,645
Oscar US Funding Trust IX LLC, Series 2018-2A, Class A2B, 1 mo. USD LIBOR + 0.470%
1.333% FRN 8/10/21  (a)		242,445		242,412
Oscar US Funding Trust VI, Series 2017-1A, Class A3
2.820% 6/10/21 (a)		30,265		30,304
Tesla Auto Lease Trust, Series 2018-B, Class A
3.710% 8/20/21 (a)		6,105,133		6,124,925
Toyota Auto Receivables Owner Trust, Series 2018-C, Class A2B, 1 mo. USD LIBOR + 0.120%
0.825% FRN 8/16/21		522,428		513,557
World Omni Auto Receivables Trust, Series 2019-C, Class A2B, 1 mo. USD LIBOR + 0.230%
0.935% FRN 2/15/23		6,000,000		5,846,377
				36,270,197

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

	Principal Amount		Value
Commercial MBS — 2.7%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500%
2.205% FRN 7/15/35  (a)	$	1,700,000	$	1,359,815
BX Commercial Mortgage Trust
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 2.305% FRN 12/15/36  (a)		1,300,000		1,143,967
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 2.405% FRN 11/15/35  (a)		1,582,000		1,443,567
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.705% FRN 10/15/36  (a)		1,671,951		1,437,829
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
2.455% FRN 12/15/37  (a)		308,865		267,365
DBJPM 17-C6 Mortgage Trust, Series 2017-C6, Class A1
1.907% 6/10/50		661,925		657,486
GCCFC Commercial Mortgage Trust, Series 2006-GG7, Class AM,
5.513% VRN 7/10/38  (b)		153,352		152,644
JP Morgan Chase Commercial Mortgage Securities Corp., Series 2018-LAQ, Class A, 1 mo. USD LIBOR + 1.000%
1.705% FRN 6/15/32  (a)		1,531,704		1,380,344
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.505% FRN 5/15/36  (a)		476,000		371,511
				8,214,528
Credit Card ABS — 0.3%
Citibank Credit Card Issuance Trust, Series 2017-A6, Class A6, 1 mo. LIBOR + 0.770%
1.475% FRN 5/14/29		1,100,000		942,845
Home Equity ABS — 0.1%
Asset Backed Securities Corp. Home Equity Loan Trust, Series 2006-HE3, Class A4, 1 mo. USD LIBOR + 0.170%
1.117% FRN 3/25/36		319,808		293,860
Municipal — 0.3%
Brazos Higher Education Authority, Inc., Series 2006-2, Class B2
2.363% 6/25/42		1,200,000		1,107,469
Other ABS — 15.5%
321 Henderson Receivables I LLC
Series 2006-1A, Class A1, 1 mo. USD LIBOR + 0.200% 0.905% FRN 3/15/41  (a)		285,511		274,952
Series 2006-2A, Class A1, 1 mo. USD LIBOR + 0.200% 0.905% FRN 6/15/41  (a)		1,179,474		1,101,371
Series 2006-4A, Class A1, 1 mo. USD LIBOR + 0.200% 0.905% FRN 12/15/41  (a)		176,025		171,035
Series 2007-1A, Class A1, 1 mo. USD LIBOR + 0.200% 0.905% FRN 3/15/42  (a)		585,474		564,885
321 Henderson Receivables II LLC, Series 2006-3A, Class A1, 1 mo. USD LIBOR + 0.200%
0.905% FRN 9/15/41  (a)		133,682		131,020
AASET Trust, Series 2017-1A, Class A
3.967% 5/16/42 (a)		159,931		125,656
AASET US Ltd., Series 2018-2A, Class A
4.454% 11/18/38 (a)		1,604,723		1,274,198
AIMCO CLO, Series 2015-AA, Class AR, 3 mo. USD LIBOR + 0.850%
2.681% FRN 1/15/28  (a)		2,450,000		2,320,148
Arbor Realty Commercial Real Estate Notes, Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.150%
1.855% FRN 6/15/28  (a)		780,000		714,243
Avant Loans Funding Trust
Series 2019-B, Class A, 2.720% 10/15/26  (a)		1,796,301		1,748,290
Series 2018-B, Class A, 3.420% 1/18/22  (a)		84,871		84,871
Series 2019-A, Class A, 3.480% 7/15/22  (a)		300,908		295,976
Avery Point IV CLO Ltd., Series 2014-1A, Class AR, 3 mo. USD LIBOR + 1.100%
2.894% FRN 4/25/26  (a)		799,721		792,114
BCC Funding XIV LLC, Series 2018-1A, Class A2
2.960% 6/20/23 (a)		317,343		310,631
Carlyle Global Market Strategies CLO Ltd., Series 2013-2A, Class AR, 3 mo. USD LIBOR + 0.890%
2.709% FRN 1/18/29  (a)		2,000,000		1,932,480
CCG Receivables Trust, Series 2018-2, Class A2
3.090% 12/15/25 (a)		590,263		587,991
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460%
1.407% FRN 9/25/34		5,039		4,148

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

	Principal Amount		Value
Elara HGV Timeshare Issuer LLC, Series 2014-A, Class B,
3.020% VRN 2/25/27  (a) (b)	$	148,195	$	145,715
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		237,283		236,885
First Franklin Mortgage Loan Trust, Series 2005-FF9, Class A4, 1 mo. USD LIBOR + 0.360%
1.307% FRN 10/25/35		1,426,710		1,307,328
Hilton Grand Vacations Trust, Series 2014-AA, Class A
1.770% 11/25/26 (a)		53,788		52,772
KREF Ltd.
Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 2.150% FRN 6/15/36  (a)		2,000,000		1,736,817
Series 2018-FL1, Class D, 1 mo. USD LIBOR + 2.550% 3.350% FRN 6/15/36  (a)		2,450,000		1,592,552
LCM Ltd., 3 mo. USD LIBOR + 1.240%
3.071% FRN 7/15/27  (a)		1,300,000		1,273,069
Lendmark Funding Trust, Series 2018-1A, Class A
3.810% 12/21/26 (a)		630,000		617,588
Marlette Funding Trust
Series 2019-3A, Class A, 2.690% 9/17/29  (a)		2,242,389		2,117,791
Series 2019-2A, Class A, 3.130% 7/16/29  (a)		301,493		289,427
Series 2018-3A, Class A, 3.200% 9/15/28  (a)		130,353		130,233
Series 2019-1A, Class A, 3.440% 4/16/29  (a)		195,712		192,943
Series 2019-2A, Class B, 3.530% 7/16/29  (a)		385,000		354,300
MVW Owner Trust, Series 2017-1A, Class A
2.420% 12/20/34 (a)		88,403		84,107
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + 0.800%
2.631% FRN 1/15/28  (a)		2,450,000		2,348,465
NP SPE II LLC, Series 2019-1A, Class A1
2.574% 9/20/49 (a)		378,558		361,228
OCP CLO Ltd., Series 2015-10A, Class A1R, 3 mo. USD LIBOR + 0.820%
2.614% FRN 10/26/27  (a)		2,013,807		1,920,525
Orange Lake Timeshare Trust, Series 2016-A, Class A
2.610% 3/08/29 (a)		216,055		207,920
Oxford Finance Funding Trust, Series 2016-1A, Class A
3.968% 6/17/24 (a)		102,869		102,619
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.797% FRN 2/25/23  (a)		440,000		403,555
Saxon Asset Securities Trust, Series 2006-2, Class A3C, 1 mo. USD LIBOR + 0.150%
1.097% FRN 9/25/36		1,763,490		1,640,158
Sierra Receivables Funding LLC
Series 2019-3A, Class C, 3.000% 8/20/36  (a)		2,831,582		2,769,150
Series 2015-3A, Class B, 3.080% 9/20/32  (a)		24,121		23,844
Series 2019-1A, Class C, 3.770% 1/20/36  (a)		603,504		596,900
Series 2019-3A, Class D, 4.180% 8/20/36  (a)		725,045		712,155
Series 2019-1A, Class D, 4.750% 1/20/36  (a)		546,027		542,667
SoFi Consumer Loan Program LLC
Series 2016-3, Class A, 3.050% 12/26/25  (a)		53,176		52,187
Series 2016-5, Class A, 3.060% 9/25/28  (a)		341,055		334,716
SoFi Consumer Loan Program Trust
Series 2017-4, Class A, 2.500% 5/26/26  (a)		485,296		450,805
Series 2017-6, Class A2, 2.820% 11/25/26  (a)		556,034		530,012
Series 2016-2A, Class A, 3.090% 10/27/25  (a)		73,990		74,241
Series 2016-1A, Class A, 3.260% 8/25/25  (a)		354,221		352,348
Series 2017-2, Class A, 3.280% 2/25/26  (a)		206,364		205,488
Springleaf Funding Trust, Series 2016-AA, Class A
2.900% 11/15/29 (a)		185,333		183,762
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 0.800%
1.747% FRN 11/25/35  (a)		1,369,940		1,284,004
Textainer Marine Containers VII Ltd., Series 2018-1A, Class A
4.110% 7/20/43 (a)		1,188,000		1,206,463
TLF National Tax Lien Trust, Series 2017-1A, Class A
3.090% 12/15/29 (a)		570,639		568,722
Trafigura Securitisation Finance PLC
Series 2017-1A, Class A1, 1 mo. USD LIBOR + 0.850% 1.555% FRN 12/15/20  (a)		2,950,000		2,941,244
Series 2017-1A, Class B, 1 mo. USD LIBOR + 1.700% 2.405% FRN 12/15/20  (a)		2,330,000		2,315,740
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (a)		141,558		139,999
Upstart Securitization Trust, Series 2019-1, Class A
3.450% 4/20/26 (a)		42,194		42,194
Verizon Owner Trust., Series 2018-1A, Class A1A
2.820% 9/20/22 (a)		1,835,000		1,812,700
Westgate Resorts LLC
Series 2017-1A, Class A, 3.050% 12/20/30  (a)		309,543		300,617
Series 2018-1A, Class A, 3.380% 12/20/31  (a)		430,346		420,767
				47,410,731

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

	Principal Amount		Value
Student Loans ABS — 16.0%
Access Group Inc., Series 2003-A, Class A3, 3 mo. CMT + 1.200%
1.220% FRN 7/01/38	$	7,452	$	7,445
AccessLex Institute, Series 2005-1, Class B, 3 mo. USD LIBOR + 0.570%
1.765% FRN 9/22/37		595,398		531,447
Brazos Higher Education Authority, Inc., Series 2006-2, Class A10, 3 mo. USD LIBOR + 0.120%
1.336% FRN 6/25/26		972,331		946,039
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + 0.100%
2.061% FRN 6/28/39		3,460,749		2,983,788
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + 0.490%
2.321% FRN 1/15/37		441,504		382,609
Commonbond Student Loan Trust, Series 2018-CGS, Class C
4.350% 2/25/46 (a)		116,101		110,989
DRB Prime Student Loan Trust
Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900% 2.847% FRN 10/25/44  (a)		1,471,431		1,453,376
Series 2016-A, Class A1, 1 mo. USD LIBOR + 2.000% 2.947% FRN 4/25/40  (a)		212,871		200,318
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050%
2.997% FRN 2/26/35  (a)		159,218		149,590
ECMC Group Student Loan Trust
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 2.147% FRN 12/27/66  (a)		1,368,052		1,211,537
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 2.297% FRN 7/26/66  (a)		928,891		811,985
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, PRIME - 1.150%
3.600% FRN 12/01/47  (a)		753,781		745,775
Edsouth Indenture
No.9 LLC, Series 2015-1, Class A, 1 mo. USD LIBOR + 0.800% 1.747% FRN 10/25/56  (a)		387,398		361,982
No.10 LLC, Series 2015-2, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 12/25/58  (a)		1,000,000		948,672
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 0.750%
1.697% FRN 8/25/42  (a)		507,694		471,783
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + 0.700%
2.379% FRN 8/25/48  (a)		271,741		254,765
JP Morgan Student Loan Trust, Series 2007-A, Class B, 3 mo. USD LIBOR + 0.350%
2.145% FRN 6/28/39  (a)		492,122		434,131
KeyCorp Student Loan Trust, Series 2000-A, Class A2, 3 mo. USD LIBOR + 0.320%
1.999% FRN 5/25/29		113,253		113,253
Laurel Road Prime Student Loan Trust, Series 2019-A, Class A1FX
2.340% 10/25/48 (a)		1,525,410		1,420,312
Navient Private Education Loan Trust, Series 2015-AA, Class A2B, 1 mo. USD LIBOR + 1.200%
1.905% FRN 12/15/28  (a)		399,263		371,692
Navient Student Loan Trust
Series 2018-1A, Class A3, 1 mo. USD LIBOR + 0.720% 1.667% FRN 3/25/67  (a)		1,120,000		1,047,337
Series 2016-3A, Class A2, 1 mo. USD LIBOR + 0.850% 1.797% FRN 6/25/65  (a)		180,153		167,353
Series 2019-2A, Class A2, 1 mo. USD LIBOR + 1.000% 1.947% FRN 2/27/68  (a)		3,387,000		3,187,802
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 2.097% FRN 7/26/66  (a)		410,000		357,823
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 2.197% FRN 6/25/65  (a)		2,041,784		1,867,396
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 2.247% FRN 3/25/66  (a)		2,200,000		2,041,223
Series 2019-3A, Class B, 1 mo. USD LIBOR + 1.550% 2.497% FRN 7/25/68  (a)		2,900,000		2,214,050
Series 2018-A, Class A1, 2.530% 2/18/42  (a)		292,365		279,890
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750%
2.697% FRN 12/26/40  (a)		331,510		313,485
Nelnet Student Loan Trust
Series 2005-2, Class B, 3 mo. USD LIBOR + 0.170% 1.365% FRN 3/23/37		854,830		820,636
Series 2006-3, Class B, 3 mo. USD LIBOR + 0.250% 1.466% FRN 6/25/41		314,038		273,381
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.200% 1.994% FRN 1/25/38		694,352		599,763
Series 2004-3, Class B, 3 mo. USD LIBOR + 0.350% 2.144% FRN 10/25/40		1,108,738		993,976
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/41  (a)		375,000		354,496
SLC Student Loan Trust
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.230% 0.971% FRN 12/15/39		1,202,289		1,062,612
Series 2005-2, Class B, 3 mo. USD LIBOR + 0.280% 1.021% FRN 3/15/40		1,821,150		1,597,472

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

	Principal Amount		Value
SLM Private Education Loan Trust, Series 2011-A, Class A3, 1 mo. USD LIBOR + 2.500%
3.205% FRN 1/15/43  (a)	$	55,459	$	53,357
SLM Student Loan Trust
Series 2003-11, Class B, 3 mo. USD LIBOR + 0.650% 1.391% FRN 12/15/38		424,594		376,622
Series 2002-7, Class A11, 28 day ARS 1.403% FRN 3/15/28		25,000		25,000
Series 2007-4, Class B1, 3 mo. USD LIBOR + 0.140% 1.934% FRN 7/25/25		600,061		600,061
Series 2005-5, Class A4, 3 mo. USD LIBOR + 0.140% 1.934% FRN 10/25/28		463,592		438,395
Series 2006-4, Class B, 3 mo. USD LIBOR + 0.200% 1.994% FRN 1/25/70		355,286		316,583
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 2.004% FRN 10/25/40		379,970		339,315
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.220% 2.014% FRN 1/25/41		416,489		373,040
Series 2003-14, Class A6, 3 mo. USD LIBOR + 0.300% 2.094% FRN 7/25/25		271,948		257,917
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 2.104% FRN 1/25/55		379,473		337,177
Series 2004-8, Class B, 3 mo. USD LIBOR + 0.460% 2.254% FRN 1/25/40		416,751		371,073
Series 2004-3, Class B, 3 mo. USD LIBOR + 0.470% 2.264% FRN 10/25/64		290,122		257,255
Series 2003-14, Class A7, 3 mo. USD LIBOR + 0.600% 2.394% FRN 10/25/65  (a)		2,100,000		1,863,752
SMB Private Education Loan Trust
Series 2018-C, Class A1, 1 mo. USD LIBOR + 0.300% 1.005% FRN 9/15/25  (a)		104,409		100,308
Series 2019-A, Class A1, 1 mo. USD LIBOR + 0.350% 1.055% FRN 2/16/26  (a)		992,712		941,185
Series 2019-B, Class A1, 1 mo. USD LIBOR + 0.350% 1.055% FRN 7/15/26  (a)		318,204		303,019
Series 2018-B, Class A2B, 1 mo. USD LIBOR + 0.720% 1.425% FRN 1/15/37  (a)		1,468,031		1,312,151
Series 2019-A, Class A2B, 1 mo. USD LIBOR + 0.870% 1.575% FRN 7/15/36  (a)		1,639,000		1,442,971
Series 2014-A, Class A2A, 3.050% 5/15/26  (a)		222,205		215,039
SoFi Alternative Trust, Series 2019-C, Class PT,
6.163% VRN 1/25/45  (a) (b)		2,002,877		2,111,445
SoFi Professional Loan Program LLC
Series 2017-A, Class A1, 1 mo. USD LIBOR + 0.700% 1.647% FRN 3/26/40  (a)		285,427		271,659
Series 2017-F, Class A1FX, 2.050% 1/25/41  (a)		78,957		75,186
Series 2019-C, Class A1FX, 2.130% 11/16/48  (a)		1,918,466		1,806,430
Series 2016-A, Class A1, 1 mo. USD LIBOR + 1.750% 2.697% FRN 8/25/36  (a)		236,789		229,554
Series 2016-B, Class A2B, 2.740% 10/25/32  (a)		3,135,329		3,039,392
South Carolina Student Loan Corp., Series 2010-1, Class A2, 3 mo. USD LIBOR + 1.000%
2.794% FRN 7/25/25		513,495		513,495
				49,061,564
WL Collateral CMO — 12.1%
Angel Oak Mortgage Trust, Series 2018-3, Class A3,
3.238% VRN 5/25/59  (a) (b)		1,488,047		1,442,877
Banc of America Funding, Series 2006-G, Class 2A1, 1 mo. USD LIBOR + 0.440%
1.213% FRN 7/20/36		1,687,041		1,641,767
BRAVO Residential Funding Trust, Series 2019-NQM1, Class A1,
2.666% VRN 7/25/59  (a) (b)		8,035,961		7,817,512
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000%
2.577% FRN 8/25/49  (a)		4,167,007		3,823,251
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A3,
3.030% VRN 7/25/49  (a) (b)		1,165,709		1,142,255
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A1, 2.976% VRN 12/25/57  (a) (b)		330,345		317,560
Series 2018-1A, Class A2, 3.027% VRN 12/25/57  (a) (b)		330,345		316,620
Series 2018-2A, Class A1, 3.479% VRN 4/25/58  (a) (b)		1,116,947		1,072,683
Series 2019-1A, Class A3, 3.948% VRN 1/25/59  (a) (b)		252,985		240,623
Series 2018-4A, Class A3, 4.285% VRN 10/25/58  (a) (b)		1,636,060		1,563,994
JP Morgan Mortgage Trust
Series 2018-1, Class A5, 3.500% VRN 6/25/48  (a) (b)		480,237		485,905
Series 2018-3, Class A5, 3.500% VRN 9/25/48  (a) (b)		743,254		752,111
Series 2017-6, Class A5, 3.500% VRN 12/25/48  (a) (b)		659,123		667,198
New Residential Mortgage Loan Trust, Series 2019-NQM1, Class A3,
3.928% VRN 1/25/49  (a) (b)		1,070,027		1,018,215
Onslow Bay Financial LLC, Series 2020-EXP1, Class 2A2, 1 mo. USD LIBOR + 0.950%
1.897% FRN 2/25/60  (a)		1,995,040		1,928,866
Opteum Mortgage Acceptance Corp. Asset Backed Pass-Through Certificates, Series 2005-4, Class 1APT, 1 mo. USD LIBOR + 0.310%
1.257% FRN 11/25/35		1,375,717		1,252,036
PSMC Trust, Series 2018-1, Class A3,
3.500% VRN 2/25/48  (a) (b)		697,502		683,657

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

	Principal Amount		Value
Sequoia Mortgage Trust
Series 2018-3, Class A4, 3.500% VRN 3/25/48  (a) (b)	$	616,974	$	610,831
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48  (a) (b)		368,624		366,496
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48  (a) (b)		1,156,202		1,138,100
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48  (a) (b)		306,176		303,231
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3,
2.916% VRN 9/27/49  (a) (b)		949,467		900,322
Verus Securitization Trust
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59  (a) (b)		959,919		934,535
Series 2019-1, Class A1, 3.836% VRN 2/25/59  (a) (b)		2,442,447		2,328,452
Series 2019-1, Class A3, 4.040% VRN 2/25/59  (a) (b)		4,480,445		4,291,999
				37,041,096
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $193,391,122)				183,610,485
U.S. Government Agency Obligations and Instrumentalities — 0.5%
Pass-Through Securities — 0.1%
Federal Home Loan Mortgage Corp.
Pool #1Q0239, 1 year CMT + 2.217% 3.977% 3/01/37		199,264		208,974
Whole Loans — 0.4%
Federal National Mortgage Association Connecticut Avenue Securities, Series 2017-C07, Class 1M1, 1 mo. USD LIBOR + 0.650%
1.597% FRN 5/25/30		268,368		266,850
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2018-C03, Class 1M1, 1 mo. USD LIBOR + 0.680% 1.627% FRN 10/25/30		459,235		454,745
Series 2018-C05, Class 1M1, 1 mo. USD LIBOR + 0.720% 1.667% FRN 1/25/31		607,407		603,358
				1,324,953
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $1,538,414)				1,533,927
U.S. Treasury Obligations — 21.5%
U.S. Treasury Bonds & Notes — 21.5%
U.S. Treasury Inflation Index
0.125% 4/15/22		21,212		20,921
0.125% 1/15/23		189,972		187,682
0.125% 10/15/24		11,360,455		11,498,913
0.125% 7/15/26		3,228,240		3,256,878
0.125% 1/15/30		2,406,120		2,477,344
0.250% 1/15/25		7,187,532		7,252,062
0.250% 7/15/29		7,008,311		7,276,639
0.375% 7/15/25 (c)		3,556,746		3,627,784
0.375% 7/15/27		52,723		54,214
0.500% 1/15/28		2,509,680		2,613,770
0.625% 4/15/23		5,633,537		5,674,569
0.625% 1/15/26		2,415,349		2,494,761
0.625% 2/15/43		2,019,438		2,216,995
0.750% 7/15/28		2,234,987		2,390,060
0.750% 2/15/45		1,807,361		2,066,344
0.875% 2/15/47		1,709,680		2,035,276
1.000% 2/15/48		1,830,500		2,253,357
1.000% 2/15/49		1,178,808		1,464,540
2.125% 2/15/41		1,060,065		1,475,966
3.375% 4/15/32		363,295		512,777
3.625% 4/15/28		1,674,509		2,154,098
3.875% 4/15/29		2,039,739		2,747,563
				65,752,513
TOTAL U.S. TREASURY OBLIGATIONS (Cost $62,985,712)				65,752,513
TOTAL BONDS & NOTES (Cost $261,051,941)				254,428,811
TOTAL PURCHASED OPTIONS (#) — 0.3% (Cost $1,845,236)				1,072,161
TOTAL LONG-TERM INVESTMENTS (Cost $262,897,177)				255,500,972

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

	Principal Amount		Value
Short-Term Investments — 22.7%
Commercial Paper — 19.8%
American Electric Power Co., Inc.
1.830% 5/04/20 (a)	$	3,000,000	$	2,990,649
Avangrid, Inc.
1.318% 4/03/20 (a)		4,000,000		3,999,142
Boeing Co.
1.680% 6/03/20 (a)		7,000,000		6,950,845
Carnival Corp.
1.746% 11/25/20 (a)		4,000,000		3,819,688
1.902% 11/25/20 (a)		2,000,000		1,909,844
Daimler Finance North America LLC
2.840% 4/07/20 (a)		4,000,000		3,997,822
Dupont De Nemours, Inc.
3.043% 4/07/20 (a)		4,000,000		3,996,967
Entergy Corp.
1.811% 5/04/20 (a)		3,000,000		2,995,345
1.834% 5/01/20 (a)		3,000,000		2,995,781
Fmc Tech, Inc.
1.983% 4/08/20 (a)		3,000,000		2,998,096
1.984% 4/06/20 (a)		3,000,000		2,998,628
1.984% 4/08/20 (a)		1,000,000		999,365
General Electric Co.
1.905% 5/04/20		3,000,000		2,990,650
Harley-Davidson, Inc.
2.028% 4/02/20 (a)		4,000,000		3,999,639
HP, Inc.
1.830% 4/06/20 (a)		2,000,000		1,999,049
National Grid PLC
1.782% 5/27/20 (a)		4,000,000		3,979,100
Public Sevice Enterprise Group, Inc.
2.894% 4/20/20		3,000,000		2,994,653
Reckitt Benckiser Treasury Services PLC
2.152% 4/21/20 (a)		1,000,000		999,259
Suncor Energy, Inc.
1.915% 4/02/20 (a)		3,000,000		2,999,580
				60,614,102
Repurchase Agreement — 2.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (d)		8,882,590		8,882,590
TOTAL SHORT-TERM INVESTMENTS (Cost $69,749,541)				69,496,692
TOTAL INVESTMENTS — 106.0% (Cost $332,646,718) (e)				324,997,664
Other Assets/(Liabilities) — (6.0)%				(18,514,007	)
NET ASSETS — 100.0%			$	306,483,657

Abbreviation Legend

ABS	Asset-Backed Security
ARS	Auction Rate Security
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
FRN	Floating Rate Note
MBS	Mortgage-Backed Security
VRN	Variable Rate Note
WL	Whole Loan

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

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 March 31, 2020, the aggregate market value of these securities amounted to $209,410,966 or 68.33% 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 March 31, 2020.
(c)	A portion of this security is pledged/held as collateral for open derivatives.
(d)	Maturity value of $8,882,590. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $9,063,757.
(e)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund				Received by Fund
Description	Counterparty	Expiration Date	Rate		Frequency		Rate	Frequency		Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32		3-Month USD LIBOR BBA		Quarterly	2.44%		Semi-Annually	USD	1,967,000	$	317,080	$	98,335	$	218,745
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32		2.94%		Semi-Annually	3-Month USD LIBOR BBA		Quarterly	USD	22,880,000	$	502,902	$	1,143,840	$	(640,938	)
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33		3.11%		Semi-Annually	3-Month USD LIBOR BBA		Quarterly	USD	12,590,000		252,179		603,061		(350,882	)
													755,081		1,746,901		(991,820	)
												$	1,072,161	$	1,845,236	$	(773,075	)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	6/19/20		24	$	4,116,954		$	180,546
U.S. Treasury Note 2 Year	6/30/20		50		10,995,737			23,404
							$	203,950
Short
U.S. Treasury Ultra 10 Year	6/19/20		35	$	(5,242,152	)	$	(218,942	)
U.S. Treasury Ultra Bond	6/19/20		6		(1,332,480	)		1,230
U.S. Treasury Note 5 Year	6/30/20		38		(4,738,146	)		(25,510	)
							$	(243,222	)

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

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 34†

1.00%

Quarterly

6/20/25

USD

1,800,000

$

11,980

$

6,392

$

5,588

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)
1.643%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	12/09/21	USD	11,000,000	$	(325,171	)	$	—	$	(325,171	)
1.669%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	11/08/22	USD	1,920,000		(70,144	)		—		(70,144	)
								$	(395,315	)	$	—	$	(395,315	)

OTC Total Return Swaps
Paid by the Fund				Received by the Fund
Rate/ Reference	Frequency	No. of Contracts/ Notional		Rate/ Reference	Frequency	No. of Contracts/ Notional		Counterparty	Termination Date	Value		Upfront Premium Received (Paid)/ Received		Unrealized Appreciation (Depreciation)
1.77%	Maturity	USD	40,000,000	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity		123,929	BNP Paribas SA	7/31/20	$	1,870	$	—	$	1,870
1.76%	Maturity	USD	60,000,000	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity		186,216	BNP Paribas SA	8/31/20		106,684		—		106,684
1.79%	Maturity	USD	50,000,000	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity		157,026	Goldman Sachs International	5/29/20		684,726		—		684,726
1.79%	Maturity	USD	50,000,000	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity		156,349	Goldman Sachs International	7/31/20		466,233		—		466,233
1.76%	Maturity	USD	50,000,000	Bloomberg Barclays US Treasury Inflation Notes TR Index	Maturity		155,180	Goldman Sachs International	8/31/20		88,905		—		88,905
										$	1,348,418	$	—	$	1,348,418

† 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 Managed Bond Fund —  Portfolio of Investments
March 31, 2020 (Unaudited)
	Number of Shares		Value
Equities — 0.3%
Preferred Stock — 0.3%
Financial — 0.3%
Insurance — 0.3%
Allstate Corp., 3 mo. USD LIBOR + 3.165%
5.100% VRN 1/15/53		95,000	$	2,314,200
TOTAL PREFERRED STOCK (Cost $2,375,000)				2,314,200
TOTAL EQUITIES (Cost $2,375,000)				2,314,200

	Principal Amount
Bonds & Notes — 99.5%
Corporate Debt — 36.4%
Aerospace & Defense — 0.1%
United Technologies Corp.
6.125% 7/15/38	$	350,000	502,966
Agriculture — 0.9%
BAT Capital Corp.
4.758% 9/06/49		540,000	509,841
Bunge Ltd. Finance Corp.
3.250% 8/15/26		1,179,000	1,069,295
4.350% 3/15/24		1,810,000	1,770,000
Imperial Brands Finance PLC
3.875% 7/26/29 (a)		2,764,000	2,584,762
Reynolds American, Inc.
4.450% 6/12/25		1,095,000	1,101,540
5.850% 8/15/45		985,000	1,058,037
			8,093,475
Airlines — 0.2%
American Airlines Pass-Through Trust, Series 2014-1, Class B,
4.375% 4/01/24		153,361	143,575
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A,
4.100% 10/01/29		1,495,879	1,455,178
United Airlines Pass-Through Trust, Series 2018-1, Class B,
4.600% 9/01/27		492,202	426,399
			2,025,152
Auto Manufacturers — 1.7%
Ford Motor Credit Co. LLC
3.087% 1/09/23		1,410,000	1,297,200
3.336% 3/18/21		2,700,000	2,591,460
4.140% 2/15/23		2,760,000	2,557,968
4.375% 8/06/23		2,278,000	2,070,930
General Motors Co.
4.200% 10/01/27		565,000	466,860
5.150% 4/01/38		800,000	578,578
General Motors Financial Co., Inc.
3.500% 11/07/24		2,100,000	1,847,696
4.150% 6/19/23		2,193,000	1,994,747
4.200% 11/06/21		1,216,000	1,160,604
Hyundai Capital America
2.850% 11/01/22 (a)		1,705,000	1,664,978
			16,231,021
Banks — 5.4%
Associated Banc-Corp.
4.250% 1/15/25		2,411,000	2,482,975
Bank of America Corp.
3 mo. USD LIBOR + 1.060% 3.559% VRN 4/23/27		725,000	758,659
4.183% 11/25/27		1,090,000	1,126,693
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		1,150,000	1,322,485
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		475,000	513,505
6.110% 1/29/37		1,550,000	1,991,302
7.750% 5/14/38		400,000	590,905
The Bank of Nova Scotia
4.500% 12/16/25		795,000	816,793
3 mo. USD LIBOR + 2.648% 4.650% VRN   (b) (c)		3,575,000	2,730,406
Barclays Bank PLC
10.179% 6/12/21 (a)		3,351,000	3,579,891
Barclays PLC
3 mo. USD LIBOR + 1.380% 3.072% FRN 5/16/24		2,085,000	1,836,063
4.337% 1/10/28		1,720,000	1,748,440
Citigroup, Inc.
4.125% 7/25/28		1,725,000	1,765,109
Credit Suisse AG
6.500% 8/08/23 (a)		3,069,000	3,113,746
Deutsche Bank AG
3.150% 1/22/21		1,998,000	1,951,944
Discover Bank 5 year USD Swap + 1.730%
4.682% VRN 8/09/28		2,905,000	2,957,900
First Republic Bank
4.375% 8/01/46		4,360,000	4,637,440
Fulton Financial Corp.
3.600% 3/16/22		1,565,000	1,576,827
The Goldman Sachs Group, Inc.
4.250% 10/21/25		550,000	566,951
5.950% 1/15/27		1,410,000	1,596,579
6.750% 10/01/37		1,145,000	1,515,710
HSBC Holdings PLC
4.250% 3/14/24		1,225,000	1,257,047
ING Groep NV
3.550% 4/09/24		1,205,000	1,210,816
JP Morgan Chase & Co.
5.600% 7/15/41		1,125,000	1,495,200
Morgan Stanley
4.350% 9/08/26		3,200,000	3,389,667
5.000% 11/24/25		975,000	1,067,367
Truist Bank
2.250% 3/11/30		1,285,000	1,174,944
Valley National Bancorp
5.125% 9/27/23		1,530,000	1,596,882
Wells Fargo & Co.
5.375% 11/02/43		909,000	1,065,592
			51,437,838

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Beverages — 0.5%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc.
4.900% 2/01/46	$	3,475,000	$	3,784,844
Molson Coors Beverage Co.
4.200% 7/15/46		1,124,000		1,004,748
5.000% 5/01/42		360,000		349,011
				5,138,603
Building Materials — 0.1%
Standard Industries, Inc.
5.500% 2/15/23 (a)		545,000		525,925
Chemicals — 1.1%
DuPont de Nemours, Inc.
5.319% 11/15/38		1,750,000		1,965,626
Huntsman International LLC
5.125% 11/15/22		1,000,000		1,025,000
Syngenta Finance NV
3.698% 4/24/20 (a)		1,870,000		1,866,403
4.441% 4/24/23 (a)		2,065,000		1,945,309
Yara International ASA
4.750% 6/01/28 (a)		3,328,000		3,356,281
				10,158,619
Commercial Services — 0.0%
ERAC USA Finance LLC
6.700% 6/01/34 (a)		125,000		161,974
Computers — 0.8%
Dell International LLC/EMC Corp.
6.020% 6/15/26 (a)		2,702,000		2,788,685
Genpact Luxembourg Sarl
3.375% 12/01/24		2,660,000		2,670,924
3.700% STEP 4/01/22		2,400,000		2,443,136
				7,902,745
Diversified Financial Services — 2.8%
Aircastle Ltd.
4.400% 9/25/23		3,095,000		2,959,794
5.000% 4/01/23		1,750,000		1,708,529
Ameriprise Financial, Inc.
3.000% 4/02/25 (d)		875,000		871,299
Antares Holdings LP
6.000% 8/15/23 (a)		2,945,000		3,033,357
Ares Finance Co. LLC
4.000% 10/08/24 (a)		2,080,000		2,055,008
Avolon Holdings Funding Ltd.
3.250% 2/15/27 (a)		1,365,000		1,070,478
Brookfield Finance, Inc.
4.850% 3/29/29		1,752,000		1,858,742
GE Capital International Funding Co. Unlimited Co.
4.418% 11/15/35		335,000		357,472
Global Aircraft Leasing Co. Ltd.
6.500% 9/15/24 (a)		1,350,000		869,400
Lazard Group LLC
3.625% 3/01/27		1,253,000		1,255,954
3.750% 2/13/25		800,000		788,986
4.500% 9/19/28		755,000		756,957
LeasePlan Corp. NV
2.875% 10/24/24 (a)		1,535,000		1,503,650
Legg Mason, Inc.
5.625% 1/15/44		1,195,000		1,269,295
Park Aerospace Holdings Ltd.
4.500% 3/15/23 (a)		1,550,000		1,344,540
5.250% 8/15/22 (a)		5,055,000		4,567,779
5.500% 2/15/24 (a)		545,000		468,973
				26,740,213
Electric — 1.8%
Appalachian Power Co.
4.500% 3/01/49		1,250,000		1,301,357
Avangrid, Inc.
3.800% 6/01/29		1,675,000		1,712,712
CMS Energy Corp.
4.875% 3/01/44		780,000		842,253
Duke Energy Corp.
3.750% 9/01/46		635,000		607,906
Entergy Louisiana LLC
4.950% 1/15/45		1,005,000		1,062,309
Infraestructura Energetica Nova SAB de CV
3.750% 1/14/28 (a)		820,000		713,400
IPALCO Enterprises, Inc.
3.450% 7/15/20		3,410,000		3,409,487
3.700% 9/01/24		1,060,000		1,098,562
Nevada Power Co.
6.650% 4/01/36		550,000		726,935
Oncor Electric Delivery Co.
7.500% 9/01/38		495,000		754,223
Pennsylvania Electric Co.
4.150% 4/15/25 (a)		1,860,000		1,842,842
Potomac Electric Power Co.
4.150% 3/15/43		700,000		765,111
Southwestern Electric Power Co.
6.200% 3/15/40		300,000		396,145
Xcel Energy, Inc.
6.500% 7/01/36		1,250,000		1,631,231
				16,864,473
Foods — 0.4%
Ingredion, Inc.
3.200% 10/01/26		638,000		683,841
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc.
5.500% 1/15/30 (a)		776,000		801,220
Kraft Heinz Foods Co.
3.950% 7/15/25		984,000		979,264
Mars, Inc.
3.950% 4/01/49 (a)		1,510,000		1,636,047
				4,100,372

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Forest Products & Paper — 0.1%
Fibria Overseas Finance Ltd.
4.000% 1/14/25	$	1,250,000	$	1,154,388
Gas — 0.4%
CenterPoint Energy Resources Corp.
6.625% 11/01/37		1,250,000		1,737,944
NiSource, Inc.
4.800% 2/15/44		1,035,000		1,044,485
5.800% 2/01/42		950,000		1,056,383
				3,838,812
Health Care – Services — 0.2%
City of Hope
4.378% 8/15/48		1,050,000		1,254,024
Humana, Inc.
4.800% 3/15/47		830,000		924,891
				2,178,915
Housewares — 0.3%
Newell Brands, Inc.
3.850% STEP 4/01/23		2,982,000		3,026,578
Insurance — 4.8%
Allstate Corp. 3 mo. USD LIBOR + 2.938%
5.750% VRN 8/15/53		4,260,000		3,791,400
American International Group, Inc.
4.200% 4/01/28		1,025,000		1,056,174
4.500% 7/16/44		725,000		735,191
4.750% 4/01/48		505,000		532,955
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		2,860,000		2,503,072
AmTrust Financial Services, Inc.
6.125% 8/15/23		3,370,000		3,328,522
Arch Capital Group US, Inc.
5.144% 11/01/43		540,000		664,995
Athene Global Funding
2.500% 1/14/25 (a)		2,780,000		2,618,641
Athene Holding Ltd.
4.125% 1/12/28		6,228,000		5,624,526
6.150% 4/03/30 (d)		200,000		199,616
AXIS Specialty Finance LLC
3.900% 7/15/29		885,000		916,035
5 year CMT + 3.186% 4.900% VRN 1/15/40		1,315,000		1,130,900
AXIS Specialty Finance PLC
4.000% 12/06/27		2,500,000		2,620,307
Brown & Brown, Inc.
4.200% 9/15/24		1,132,000		1,193,871
CNO Financial Group, Inc.
5.250% 5/30/25		2,621,000		2,727,477
Enstar Group Ltd.
4.500% 3/10/22		920,000		917,633
4.950% 6/01/29		1,600,000		1,506,913
Markel Corp.
3.350% 9/17/29		585,000		551,685
The Progressive Corp.
3.950% 3/26/50		180,000		210,202
3 mo. USD LIBOR + 2.539% 5.375% VRN   (b)		1,625,000		1,375,595
Prudential Financial, Inc.
3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		1,025,000		963,193
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48  (c)		2,440,000		2,257,000
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		550,000		533,500
USF&G Capital I
8.500% 12/15/45 (a)		885,000		1,313,536
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084%
4.700% VRN 1/23/48		1,080,000		885,600
Willis North America, Inc.
2.950% 9/15/29		905,000		859,289
4.500% 9/15/28		1,965,000		2,158,891
XLIT Ltd.
4.450% 3/31/25		2,250,000		2,323,654
				45,500,373
Internet — 0.2%
Amazon.com, Inc.
4.050% 8/22/47		1,340,000		1,745,924
Investment Companies — 1.2%
Ares Capital Corp.
3.500% 2/10/23		2,600,000		2,323,621
BlackRock TCP Capital Corp.
3.900% 8/23/24		2,910,000		2,678,124
4.125% 8/11/22		2,870,000		2,944,159
TPG Specialty Lending, Inc.
3.875% 11/01/24		3,575,000		3,153,672
				11,099,576
Iron & Steel — 0.2%
Vale Overseas Ltd.
6.250% 8/10/26		1,250,000		1,350,025
6.875% 11/21/36		630,000		699,621
				2,049,646
Machinery – Diversified — 0.2%
CNH Industrial Capital LLC
3.875% 10/15/21		2,280,000		2,268,091
Media — 1.1%
Charter Communications Operating LLC/Charter Communications Operating Capital
6.484% 10/23/45		735,000		886,645
Comcast Corp.
3.400% 7/15/46		645,000		696,921
3.450% 2/01/50		1,340,000		1,468,110
3.969% 11/01/47		630,000		716,501
4.750% 3/01/44		880,000		1,117,549
6.950% 8/15/37		265,000		412,080
Discovery Communications LLC
3.950% 3/20/28		1,052,000		1,031,301
5.000% 9/20/37		995,000		966,432
Grupo Televisa SAB
6.625% 3/18/25		2,196,000		2,417,054
Time Warner Cable, Inc.
6.750% 6/15/39		985,000		1,115,406
				10,827,999

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Mining — 1.1%
Glencore Finance Canada Ltd.
5.550% STEP 10/25/42  (a)	$	894,000	$	717,943
Glencore Funding LLC
3.875% 10/27/27 (a)		975,000		869,541
4.000% 4/16/25 (a)		2,150,000		2,083,291
4.625% 4/29/24 (a)		3,065,000		2,802,942
Kinross Gold Corp.
4.500% 7/15/27		470,000		442,369
5.125% 9/01/21		2,495,000		2,501,238
Teck Resources Ltd.
6.000% 8/15/40		850,000		728,688
				10,146,012
Miscellaneous - Manufacturing — 0.2%
Carlisle Cos., Inc.
2.750% 3/01/30		1,155,000		1,008,170
General Electric Co.
6.875% 1/10/39		298,000		368,653
4.125% 10/09/42		113,000		106,679
				1,483,502
Oil & Gas — 1.7%
Cenovus Energy, Inc.
4.250% 4/15/27		1,125,000		550,899
6.750% 11/15/39		550,000		266,377
Diamondback Energy, Inc.
3.250% 12/01/26		1,105,000		779,646
EQT Corp.
3.000% 10/01/22		1,550,000		1,294,250
3.900% 10/01/27		4,510,000		3,110,547
6.125% STEP 2/01/25		1,725,000		1,328,422
Marathon Petroleum Corp.
4.500% 4/01/48		510,000		367,659
6.500% 3/01/41		1,120,000		1,038,489
Newfield Exploration Co.
5.375% 1/01/26		1,650,000		861,779
5.625% 7/01/24		975,000		523,226
5.750% 1/30/22		1,904,000		1,296,304
Occidental Petroleum Corp.
6.600% 3/15/46		1,258,000		587,098
Ovintiv, Inc.
6.500% 2/01/38		545,000		236,661
Patterson-UTI Energy, Inc.
3.950% 2/01/28		1,680,000		658,800
Petroleos Mexicanos
5.350% 2/12/28		665,000		463,844
6.375% 1/23/45		595,000		376,278
6.500% 3/13/27		585,000		431,549
6.625% 6/15/35		140,000		95,956
Saudi Arabian Oil Co.
4.250% 4/16/39 (a)		2,075,000		2,054,435
				16,322,219
Oil & Gas Services — 0.2%
National Oilwell Varco, Inc.
3.600% 12/01/29		1,270,000		948,076
3.950% 12/01/42		1,506,000		943,344
				1,891,420
Packaging & Containers — 0.3%
Amcor Finance USA, Inc.
3.625% 4/28/26 (a)		3,105,000		3,226,621
Pharmaceuticals — 1.8%
AbbVie, Inc.
4.050% 11/21/39 (a)		1,045,000		1,074,896
4.700% 5/14/45		1,260,000		1,415,220
Allergan Funding SCS
3.800% 3/15/25		1,375,000		1,407,786
Becton Dickinson and Co.
4.685% 12/15/44		825,000		866,910
Bristol-Myers Squibb Co.
4.350% 11/15/47 (a)		830,000		1,045,196
Cigna Corp.
4.800% 7/15/46 (a)		880,000		1,040,777
CVS Health Corp.
4.300% 3/25/28		425,000		454,598
5.050% 3/25/48		1,255,000		1,433,873
6.125% 9/15/39		560,000		702,173
CVS Pass-Through Trust
5.926% 1/10/34 (a)		1,074,464		1,224,850
7.507% 1/10/32 (a)		921,179		1,196,971
McKesson Corp.
6.000% 3/01/41		550,000		699,741
Mylan NV
3.950% 6/15/26		2,230,000		2,200,650
5.250% 6/15/46		1,375,000		1,312,138
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		724,000		691,550
				16,767,329
Pipelines — 1.7%
Cheniere Energy Partners LP
4.500% 10/01/29 (a)		1,120,000		974,400
Energy Transfer Operating LP
4.200% 4/15/27		1,085,000		874,433
5.875% 1/15/24		1,150,000		1,085,970
6.125% 12/15/45		1,000,000		892,820
3 mo. USD LIBOR + 4.028% 6.250% VRN   (b)		2,370,000		1,185,000
EnLink Midstream Partners LP
4.150% 6/01/25		2,924,000		1,417,263
4.850% 7/15/26		951,000		467,607
Enterprise Products Operating LLC
3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		575,000		393,875
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		1,205,000		843,500
EQM Midstream Partners LP
4.750% 7/15/23		2,325,000		1,682,602

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
MPLX LP
4.500% 4/15/38	$	595,000	$	464,602
6.250% 10/15/22 (a)		652,000		586,945
3 mo. USD LIBOR + 4.652% 6.875% VRN   (b)		1,775,000		1,082,750
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN   (b)		2,345,000		1,172,500
Plains All American Pipeline LP/PAA Finance Corp.
4.500% 12/15/26		1,642,000		1,273,733
4.700% 6/15/44		1,195,000		785,843
Sunoco Logistics Partners Operations LP
5.300% 4/01/44		525,000		412,844
Western Midstream Operating LP
4.500% 3/01/28		655,000		314,325
				15,911,012
Private Equity — 0.6%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50  (a)		805,000		725,177
Carlyle Finance Subsidiary LLC
3.500% 9/19/29 (a)		1,100,000		984,734
Hercules Capital, Inc.
4.625% 10/23/22		2,910,000		2,771,991
KKR Group Finance Co. VI LLC
3.750% 7/01/29 (a)		1,260,000		1,256,037
				5,737,939
Real Estate Investment Trusts (REITS) — 1.8%
Alexandria Real Estate Equities, Inc.
2.750% 12/15/29		845,000		740,360
American Tower Trust #1
3.652% 3/15/48 (a)		1,910,000		1,855,663
Crown Castle International Corp.
5.200% 2/15/49		589,000		652,619
Healthcare Trust of America Holdings LP
3.500% 8/01/26		1,515,000		1,497,936
Service Properties Trust
4.500% 6/15/23		760,000		570,898
4.950% 10/01/29		1,155,000		1,000,238
Spirit Realty LP
3.200% 1/15/27		1,480,000		1,344,719
3.400% 1/15/30		515,000		442,507
4.000% 7/15/29		820,000		801,293
Store Capital Corp.
4.625% 3/15/29		1,480,000		1,402,838
Tanger Properties LP
3.875% 12/01/23		1,448,000		1,508,678
UDR, Inc.
3.200% 1/15/30		805,000		792,151
Vereit Operating Partnership LP
3.100% 12/15/29		2,790,000		2,409,113
4.625% 11/01/25		2,260,000		2,109,120
				17,128,133
Retail — 0.3%
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (a)		2,620,000		2,546,666
Semiconductors — 0.2%
KLA Corp.
3.300% 3/01/50		1,215,000		1,138,308
Microchip Technology, Inc.
3.922% 6/01/21		985,000		959,769
				2,098,077
Software — 0.4%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		1,210,000		1,144,531
Microsoft Corp.
4.450% 11/03/45		2,064,000		2,714,123
				3,858,654
Telecommunications — 1.3%
AT&T, Inc.
4.750% 5/15/46		2,830,000		3,129,755
5.250% 3/01/37		1,273,000		1,485,197
6.250% 3/29/41		210,000		258,877
Crown Castle Towers LLC
3.222% 5/15/42 (a)		1,700,000		1,700,628
4.241% 7/15/48 (a)		2,750,000		2,780,339
Embarq Corp.
7.995% 6/01/36		145,000		143,550
Qwest Corp
6.750% 12/01/21		725,000		751,317
Telefonica Emisiones SAU
4.665% 3/06/38		1,105,000		1,151,438
Verizon Communications, Inc.
4.000% 3/22/50		65,000		76,871
6.550% 9/15/43		885,000		1,107,236
				12,585,208
Transportation — 0.3%
Autoridad del Canal de Panama
4.950% 7/29/35 (a)		1,050,000		1,202,250
CSX Corp.
4.750% 11/15/48		650,000		748,291
Pacific National Finance Pty Ltd.
4.625% 9/23/20 (a)		610,000		616,930
				2,567,471
TOTAL CORPORATE DEBT (Cost $367,260,638)				345,843,941

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Municipal Obligations — 0.6%
JobsOhio Beverage System Series B, Revenue Bonds
4.532% 1/01/35	$	1,950,000	$	2,334,716
New York City Water & Sewer System, Revenue Bonds
5.882% 6/15/44		105,000		156,623
Orange County Local Transportation Authority BAB, Revenue Bonds
6.908% 2/15/41		1,350,000		1,983,582
State of California BAB, General Obligation
7.550% 4/01/39		920,000		1,492,884
				5,967,805
TOTAL MUNICIPAL OBLIGATIONS (Cost $5,405,636)				5,967,805
Non-U.S. Government Agency Obligations — 34.1%
Automobile ABS — 1.4%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (a)		1,271,000		1,252,811
Carmax Auto Owner Trust, Series 2019-3, Class D
2.850% 1/15/26		1,974,000		1,860,218
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (a)		1,625,000		1,587,391
Hertz Vehicle Financing LP
Series 2019-3A, Class B, 3.030% 12/26/25  (a)		2,293,000		2,275,376
Series 2018-1A, Class B, 3.600% 2/25/24  (a)		2,310,000		2,347,229
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B
3.950% 11/14/28 (a)		1,774,000		1,749,037
Santander Revolving Auto Loan Trust
Series 2019-A, Class B, 2.800% 1/26/32  (a)		856,000		841,098
Series 2019-A, Class C, 3.000% 1/26/32  (a)		561,000		551,197
Series 2019-A, Class D, 3.450% 1/26/32  (a)		1,087,000		1,067,885
				13,532,242
Commercial MBS — 5.3%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.112% VRN 7/05/40  (a) (e)		4,270,000		4,964,298
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
2.055% FRN 9/15/34  (a)		670,000		551,233
BANK
Series 2019-BN17, Class B, 4.128% VRN 4/15/52  (e)		441,000		409,021
Series 2019-BN16, Class AS, 4.267% 2/15/52		665,833		694,076
Series 2019-BN16, Class B, 4.438% VRN 2/15/52  (e)		547,420		520,345
BBCMS Mortgage Trust
Series 2018-CHRS, Class B, 4.267% VRN 8/05/38  (a) (e)		2,250,000		1,998,242
Series 2018-CHRS, Class C, 4.267% VRN 8/05/38  (a) (e)		1,610,000		1,361,142
Series 2018-CHRS, Class D, 4.267% VRN 8/05/38  (a) (e)		1,370,000		1,079,879
Bear Stearns Commercial Mortgage Securities, Series 2007-T26, Class AM, 5.438% VRN 1/12/45  (e)		366,073		358,139
BHMS Mortgage Trust
Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.955% FRN 7/15/35  (a)		4,450,000		3,715,364
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 2.205% FRN 7/15/35  (a)		4,950,000		3,959,461
BX Commercial Mortgage Trust
Series 2018-IND, Class B, 1 mo. USD LIBOR + .900% 1.605% FRN 11/15/35  (a)		735,000		683,546
Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 2.305% FRN 12/15/36  (a)		4,117,000		3,622,857
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 2.405% FRN 11/15/35  (a)		1,876,000		1,711,841
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 2.505% FRN 10/15/36  (a)		1,651,888		1,445,362
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.705% FRN 10/15/36  (a)		1,994,876		1,715,535
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
2.455% FRN 12/15/37  (a)		898,516		777,788
Century Plaza Towers
Series 2019-CPT, Class D, 2.997% VRN 11/13/39  (a) (e)		982,000		897,711
Series 2019-CPT, Class E, 2.997% VRN 11/13/39  (a) (e)		1,556,000		1,306,920
Commercial Mortgage Pass-Through Certificates
Series 2012-CR4, Class B, 3.703% 10/15/45  (a)		1,060,000		965,166
Series 2014-UBS2, Class AM, 4.199% 3/10/47		1,375,000		1,406,983
Series 2015-CR23, Class C, 4.304% VRN 5/10/48  (e)		1,000,000		919,050
Series 2014-LC17, Class C, 4.572% VRN 10/10/47  (e)		2,908,000		2,746,828
GCCFC Commercial Mortgage Trust, Series 2006-GG7, Class AM, 5.513% VRN 7/10/38  (e)		475,390		473,196
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39  (a) (e)		2,300,000		2,112,008
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
2.505% FRN 5/15/36  (a)		1,505,000		1,174,631
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/06/30  (a)		919,000		906,215
Series 2020-ABC, Class B, 3.477% VRN 2/06/30  (a) (e)		1,003,000		929,258
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40  (a) (e)		475,000		417,592
Series 2020-525M, Class E, 2.941% VRN 2/12/40  (a) (e)		976,000		812,020
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		1,950,000		2,030,702
Series 2018-H3, Class B, 4.620% VRN 7/15/51  (e)		760,000		734,539
Series 2011-C2, Class B, 5.200% VRN 6/15/44  (a) (e)		1,325,000		1,318,400
Velocity Commercial Capital Loan Trust, Series 2016-2, Class AFX, 2.997% VRN 10/25/46  (e)		37,241		37,193
Wells Fargo Commercial Mortgage Trust
Series 2018-C45, Class AS, 4.405% VRN 6/15/51  (e)		1,450,000		1,516,777
Series 2018-C45, Class B, 4.556% 6/15/51		400,000		386,179
				50,659,497
Other ABS — 15.1%
321 Henderson Receivables LLC, Series 2015-1A, Class A 3.260% 9/15/72 (a)		1,931,799		2,011,635
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40  (a)		1,563,292		1,120,499
Series 2019-1, Class A, 3.844% 5/15/39  (a)		1,698,020		1,279,297
AASET US Ltd., Series 2018-2A, Class A
4.454% 11/18/38 (a)		1,508,264		1,197,607
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		1,944,917		1,939,473
AIMCO CLO, Series 2019-10A, Class C, 3 mo. USD LIBOR + 2.450%
4.252% FRN 7/22/32  (a)		2,000,000		1,645,082
Allegro CLO X Ltd., Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.750%
4.569% FRN 4/20/32  (a)		2,200,000		1,825,496
Arbys Funding LLC, Series 2015-1A, Class A2
4.969% 10/30/45 (a)		1,819,250		1,749,080
Ascentium Equipment Receivables Trust
Series 2018-2A, Class D, 4.150% 7/10/24  (a)		2,473,000		2,481,869
Series 2019-1A, Class E, 4.310% 4/12/27  (a)		1,251,000		1,261,378
Assurant CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
4.069% FRN 10/20/31  (a)		820,000		666,554
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
3.556% FRN 1/23/31  (a)		1,190,000		1,069,210

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Avery Point VII CLO Ltd., Series 2015-7A, Class DR, 3 mo. USD LIBOR + 3.600%
5.431% FRN 1/15/28  (a)	$	1,000,000	$	828,325
Ballyrock CLO 2019-2 Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 4.100%
5.998% FRN 11/20/30  (a)		400,000		324,319
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class CR, 3 mo. USD LIBOR + 3.500%
5.331% FRN 1/15/29  (a)		500,000		404,247
Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class B, 3 mo. USD LIBOR + 1.950%
3.859% FRN 10/15/32  (a)		500,000		430,376
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (a)		574,979		576,084
CAL Funding II Ltd., Series 2018-2A, Class A
4.340% 9/25/43 (a)		1,292,000		1,270,102
Canyon Capital CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 2.750%
4.838% FRN 10/15/32  (a)		250,000		207,182
Capital Automotive REIT
Series 2014-1A, Class A, 3.660% 10/15/44  (a)		857,891		841,307
Series 2017-1A, Class A2, 4.180% 4/15/47  (a)		943,467		939,098
Carlyle Global Market Strategies CLO Ltd., Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.850%
4.645% FRN 7/28/28  (a)		330,000		265,030
CARS-DB4 LP
Series 2020-1A, Class A3, 3.250% 2/15/50  (a)		506,425		490,599
Series 2020-1A, Class A6, 3.810% 2/15/50  (a)		398,000		370,140
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (a)		1,346,205		941,847
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (a)		1,411,525		1,025,781
CBAM Ltd.
Series 2019-10A, Class B, 3 mo. USD LIBOR + 2.050% 3.869% FRN 4/20/32  (a)		1,900,000		1,699,261
Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100% 3.931% FRN 1/15/31  (a)		900,000		818,204
CIFC Funding Ltd., Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180%
3.016% FRN 11/16/30  (a)		2,330,000		2,205,890
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
3.019% FRN 10/20/30  (a)		2,040,000		1,927,404
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460%
1.407% FRN 9/25/34		10,860		8,940
Cronos Containers Program Ltd., Series 2014-2A, Class A
3.270% 11/18/29 (a)		244,444		238,921
DB Master Finance LLC, Series 2019-1A, Class A23
4.352% 5/20/49 (a)		1,546,315		1,378,529
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49  (a)		1,097,250		976,359
Series 2017-1A, Class A23, 4.118% 7/25/47  (a)		762,450		692,062
Series 2015-1A, Class A2II, 4.474% 10/25/45  (a)		2,991,500		2,780,494
Dryden 72 CLO Ltd., Series 2019-72A, Class B, 3 mo. USD LIBOR + 1.900%
3.592% FRN 5/15/32  (a)		1,500,000		1,331,397
Eaton Vance CLO Ltd.
Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750% 3.581% FRN 10/15/30  (a)		1,700,000		1,505,930
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.950% 3.781% FRN 4/15/31  (a)		1,800,000		1,590,626
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
3.269% FRN 4/20/31  (a)		2,900,000		2,710,131
Elmwood CLO III Ltd., Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950%
3.807% FRN 10/15/32  (a)		350,000		301,202
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		382,471		381,830
Flatiron CLO Ltd.
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900% 3.795% FRN 11/16/32  (a)		350,000		302,853
Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.700% 4.595% FRN 11/16/32  (a)		250,000		204,797
Galaxy XX CLO Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + 1.000%
2.819% FRN 4/20/31  (a)		3,000,000		2,817,921
Global SC Finance IV Ltd., Series 2017-1A, Class A
3.850% 4/15/37 (a)		1,338,869		1,338,001
Global SC Finance SRL, Series 2014-1A, Class A1
3.190% 7/17/29 (a)		216,667		184,572
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54  (a)		2,962,761		2,807,288
Series 2016-1A, Class A, 3.230% 10/15/52  (a)		1,777,465		1,729,597
Series 2017-1A, Class A, 3.740% 10/15/52  (a)		833,401		838,736
Series 2019-1A, Class A, 3.860% 10/15/54  (a)		1,422,559		1,434,473
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD LIBOR + 1.700%
3.519% FRN 1/20/31  (a)		1,290,000		1,161,921
Helios Issuer LLC, Series 2017-1A, Class A
4.940% 9/20/49 (a)		1,505,844		1,413,207
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42  (a)		1,002,425		1,016,739
Series 2017-3A, Class A1, 3.190% 9/20/48  (a)		1,020,381		1,002,173
Series 2017-2A, Class A1, 3.280% 9/20/48  (a)		299,906		308,850
Series 2016-4A, Class A1, 3.570% 9/20/47  (a)		1,212,708		1,254,623
Series 2017-2A, Class A2, 4.070% 9/20/48  (a)		241,186		251,836
Series 2018-1A, Class A2, 4.670% 9/20/48  (a)		1,810,870		1,881,205
Horizon Aircraft Finance I Ltd.
Series 2019-2, Class A, 3.425% 11/15/39  (a)		2,356,524		1,648,740
Series 2019-1, Class A, 3.721% 7/15/39  (a)		1,325,359		927,133
Series 2018-1, Class A, 4.458% 12/15/38  (a)		942,381		689,918
ICG US CLO Ltd., Series 2019-1A, Class A1A, 3 mo. USD LIBOR + 1.380%
3.496% FRN 10/26/32  (a)		750,000		684,914
J.G. Wentworth LLC, Series 2018-2A, Class A
3.960% 10/15/75 (a)		1,433,430		1,498,034
KKR Financial CLO Ltd., Series 24, Class C, 3 mo. USD LIBOR + 2.700%
4.519% FRN 4/20/32  (a)		2,400,000		1,988,150
KREF Ltd., Series 2018-FL1, Class C, 1 mo. USD LIBOR + 2.000%
2.800% FRN 6/15/36  (a)		1,670,000		1,135,644
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (a)		2,261,875		1,731,564
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (a)		1,843,000		1,288,535
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)		2,143,865		1,498,753

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Madison Park Funding Ltd.
Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 3.431% FRN 7/15/30  (a)	$	1,665,000	$	1,499,139
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 4.019% FRN 10/18/30  (a)		620,000		524,488
Mosaic Solar Loans LLC
Series 2018-1A, Class A, 4.010% 6/22/43  (a)		316,080		303,384
Series 2017-1A, Class A, 4.450% 6/20/42  (a)		336,531		328,972
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
3.069% FRN 10/20/30  (a)		1,750,000		1,619,328
MVW Owner Trust, Series 2017-1A, Class A
2.420% 12/20/34 (a)		200,916		191,153
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (a)		2,260,000		2,212,858
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 3.266% FRN 10/22/32  (a)		1,000,000		940,183
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 4.586% FRN 10/22/32  (a)		500,000		423,991
OneMain Financial Issuance Trust, Series 2019-2A, Class A
3.140% 10/14/36 (a)		8,400,000		8,273,278
Oxford Finance Funding Trust
Series 2020-1A, Class A2, 3.101% 2/15/28  (a)		1,536,000		1,528,549
Series 2016-1A, Class A, 3.968% 6/17/24  (a)		288,034		287,333
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (a)		1,546,464		1,081,117
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (a)		2,316,195		2,110,497
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.797% FRN 2/25/23  (a)		1,270,000		1,164,805
Rockford Tower CLO Ltd., Series 2019-1A, Class B1, 3 mo. USD LIBOR + 2.050%
3.869% FRN 4/20/32  (a)		1,500,000		1,309,188
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
2.921% FRN 1/15/30  (a)		2,450,000		2,318,626
Sierra Receivables Funding LLC
Series 2015-3A, Class B, 3.080% 9/20/32  (a)		84,423		83,455
Series 2018-3A, Class D, 5.200% 9/20/35  (a)		895,871		884,697
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
3.992% FRN 8/18/31  (a)		1,170,000		938,509
Store Master Funding I-VII
Series 2019-1, Class A2, 3.650% 11/20/49  (a)		2,896,987		2,601,997
Series 2018-1A, Class A2, 4.290% 10/20/48  (a)		1,310,485		1,301,307
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 0.800%
1.747% FRN 11/25/35  (a)		3,873,623		3,630,633
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (a)		163,262		162,048
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (a)		446,276		399,050
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (a)		1,957,455		1,994,086
Taco Bell Funding LLC, Series 2018-1A, Class A2II
4.940% 11/25/48 (a)		1,125,750		1,125,993
TAL Advantage VI LLC, Series 2017-1A, Class A
4.500% 4/20/42 (a)		1,906,509		1,927,188
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A
3.960% 4/20/44 (a)		507,813		485,617
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49  (a)		3,289,000		2,925,846
Series 2018-1A, Class A2, 4.620% 6/17/48  (a)		2,420,000		2,247,302
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (a)		278,693		275,624
Triton Container Finance LLC
Series 2017-1A, Class A, 3.520% 6/20/42  (a)		786,406		788,306
Series 2017-2A, Class A, 3.620% 8/20/42  (a)		2,609,453		2,619,263
Series 2018-2A, Class A, 4.190% 6/22/43  (a)		1,353,000		1,343,308
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370% 4/30/48 (a)		2,640,172		1,742,851
WAVE LLC
Series 2019-1A, Class A, 3.597% 9/15/44  (a)		3,934,344		2,578,773
Series 2017-1A, Class C, 6.656% 11/15/42  (a)		1,783,209		1,252,207
WAVE Trust, Series 2017-1A, Class A
3.844% 11/15/42 (a)		3,228,251		2,445,480
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43  (a)		1,218,813		851,368
Wind River CLO Ltd.
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 3.563% FRN 11/01/31  (a)		900,000		779,940
Series 2018-2A, Class B, 3 mo. USD LIBOR + 1.750% 3.581% FRN 7/15/30  (a)		1,150,000		992,788
				143,243,499
Student Loans ABS — 11.4%
Access Group Inc.
Series 2003-A, Class A3, 3 mo. CMT + 1.200% 1.220% FRN 7/01/38		24,592		24,567
Series 2004-A, Class A3, 28 day ARS,FRN 1.699% 7/01/39		950,000		934,834
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + 0.100%
2.061% FRN 6/28/39		5,767,915		4,972,980
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48  (a)		2,244,000		2,141,701
Series 2019-A, Class C, 4.460% 12/28/48  (a)		1,281,000		1,209,718
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS
FRN 1/25/47		900,000		687,023
ECMC Group Student Loan Trust
Series 2018-2A, Class A, 1 mo. USD LIBOR + .800% 1.747% FRN 9/25/68  (a)		2,112,697		1,836,068
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 2.147% FRN 12/27/66  (a)		2,214,941		1,961,537
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150%
3.600% FRN 12/01/47  (a)		2,203,361		2,179,958
Education Services of America
Series 2014-4, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/48  (a)		1,200,000		1,063,304
Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 10/25/56  (a)		1,100,000		986,157
Educational Funding of the South, Inc., Series 2011-1, Class B, 3 mo. USD LIBOR + 3.700%
5.494% FRN 4/25/46		625,000		595,482
EDvestinU Private Education Loan Issue No 1 LLC, Series 2019-A, Class A,
3.580% VRN 11/25/38  (a) (e)		1,520,937		1,492,188
Higher Education Funding I
Series 2004-1, Class B2, 28 day ARS 0.000%FRN 1/01/44  (a)		450,000		383,736
Series 2004-1, Class B1, 28 day ARS 2.271% FRN 1/01/44  (a)		450,000		392,431

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Laurel Road Prime Student Loan Trust, Series 2017-B, Class BFX
3.020% 8/25/42 (a)	$	610,676	$	585,015
Navient Private Education Refi Loan Trust
Series 2019-CA, Class B, 3.670% 2/15/68  (a)		2,249,000		2,297,340
Series 2019-A, Class B, 3.900% 1/15/43  (a)		1,190,000		1,206,058
Series 2018-CA, Class B, 4.220% 6/16/42  (a)		1,530,000		1,539,807
Navient Student Loan Trust
Series 2018-3A, Class A3, 1 mo. USD LIBOR + .800% 1.747% FRN 3/25/67  (a)		4,700,000		4,605,775
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.847% FRN 12/27/67  (a)		4,530,000		4,215,371
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 2.097% FRN 3/25/66  (a)		1,793,548		1,571,966
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 2.197% FRN 6/25/65  (a)		3,227,964		2,952,264
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 2.247% FRN 3/25/66  (a)		7,050,000		6,541,192
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 10/25/58		940,000		770,951
Series 2016-2, Class A3, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/65  (a)		2,370,000		2,215,746
Series 2019-BA, Class B, 4.040% 12/15/59  (a)		2,950,000		3,081,502
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B
3.600% 12/26/40 (a)		478,904		479,001
Nelnet Student Loan Trust
Series 2006-3, Class B, 3 mo. USD LIBOR + 0.250% 1.466% FRN 6/25/41		583,789		508,208
Series 2019-2A, Class A, 1 mo. USD LIBOR + .900% 1.847% FRN 6/27/67  (a)		1,883,335		1,746,869
Series 2005-4, Class A4A, 7 day ARS 1.929% FRN 3/22/32		325,000		306,507
Series 2019-1A, Class B, 1 mo. USD LIBOR + 1.400% 2.347% FRN 4/25/67  (a)		3,250,000		3,063,076
Series 2019-5, Class A, 2.530% 10/25/67  (a)		8,314,580		7,971,676
Series 2019-5, Class B, 3.450% 10/25/67  (a)		2,150,000		2,037,129
SLC Student Loan Trust, Series 2007-1, Class A5, 3 mo. USD LIBOR + .090%
1.782% FRN 2/15/68		4,000,000		3,398,979
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		7,308		3,654,000
Series 2002-7, Class A11, 28 day ARS 1.403% FRN 3/15/28		13,000		13,000
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 2.004% FRN 10/25/40		1,961,593		1,751,714
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 2.084% FRN 1/25/44		2,046,632		1,812,001
Series 2003-14, Class A7, 3 mo. USD LIBOR + 0.600% 2.394% FRN 10/25/65  (a)		4,300,000		3,816,254
Series 2002-7, Class B, 28 day ARS 5.281% FRN 12/15/39		3,950,000		3,675,389
SoFi Alternative Trust, Series 2019-C, Class PT,
6.163% VRN 1/25/45  (a) (e)		6,275,682		6,615,861
SoFi Professional Loan Program LLC
Series 2015-A, Class RC, 0.000% 3/25/33  (a)		1,200		990,000
Series 2017-D, Class R1, 0.000% 9/25/40  (a)		4,688,500		2,191,264
Series 2018-A, Class R1, 0.000% 2/25/42  (a)		3,759,800		2,641,259
Series 2018-B, Class R1, 0.000% 8/26/47  (a)		3,324,300		1,734,169
Series 2018-D, Class R1, 0.000% 2/25/48  (a)		4,961,600		1,711,752
Series 2019-A, Class R1, 0.000% 6/15/48  (a)		6,724,700		2,052,803
Series 2017-C, Class C, 4.210% VRN 7/25/40  (a) (e)		990,000		921,321
South Carolina Student Loan Corp., Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500%
3.081% FRN 8/01/35		3,050,000		2,921,294
				108,458,197
WL Collateral CMO — 0.9%
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
4.615% VRN 8/25/34  (e)		19,725		17,689
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.722% VRN 2/25/34  (e)		17,782		15,851
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33  (e)		3,965		3,687
Deephaven Residential Mortgage Trust, Series 2019-1A, Class A3,
3.948% VRN 1/25/59  (a) (e)		747,112		710,606
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
4.304% VRN 8/25/34  (e)		5,653		5,465
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.885% VRN 8/25/34  (e)		35,255		30,302
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47  (a) (e)		2,598,303		2,588,599
Merrill Lynch Mortgage Investors, Inc.
Series 2004-A1, Class IA, 3.250% VRN 2/25/34  (e)		1,905		1,705
Series 2003-A4, Class IA, 4.678% VRN 7/25/33  (e)		1,921		1,704
PSMC Trust, Series 2018-2, Class A1,
3.500% VRN 6/25/48  (a) (e)		2,813,773		2,766,105
Sequoia Mortgage Trust, Series 2019-1, Class A1,
4.000% VRN 2/25/49  (a) (e)		361,053		352,855
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A,
3.854% VRN 3/25/34  (e)		20,354		18,294
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400%
3.366% FRN 4/25/44		51,198		45,845
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1,
4.000% VRN 11/25/48  (a) (e)		1,403,501		1,407,777
				7,966,484
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS                                                                                                             (Cost $353,715,873)				323,859,919
Sovereign Debt Obligations — 0.7%
Colombia Government International Bond
6.125% 1/18/41		2,080,000		2,390,710
Mexico Government International Bond
4.750% 3/08/44		3,727,000		3,751,263
6.750% 9/27/34		685,000		900,782
				7,042,755
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $6,705,365)				7,042,755
U.S. Government Agency Obligations and Instrumentalities — 26.1%
Collateralized Mortgage Obligations — 0.3%
Federal Home Loan Mortgage Corp.
Series 2617, Class Z, 5.500% 5/15/33		955,132		1,101,827
Series 2693, Class Z, 5.500% 10/15/33		1,714,711		1,926,721
Series 2178, Class PB, 7.000% 8/15/29		36,937		41,824
				3,070,372

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Pass-Through Securities — 25.5%
Federal Home Loan Mortgage Corp.
Pool #SB8013 2.500% 9/01/34	$	6,760,488	$	7,017,375
Pool #SB8020 2.500% 12/01/34		4,000,442		4,152,452
Pool #J13972 3.500% 1/01/26		33,295		35,055
Pool #C91344 3.500% 11/01/30		107,259		114,794
Pool #C91424 3.500% 1/01/32		72,609		77,801
Pool #C91239 4.500% 3/01/29		5,161		5,633
Pool #C91251 4.500% 6/01/29		34,157		37,281
Pool #ZA5946 4.500% 11/01/48		8,021,606		8,624,960
Pool #G05253 5.000% 2/01/39		168,449		188,847
Pool #C90939 5.500% 12/01/25		17,482		19,169
Pool #C91026 5.500% 4/01/27		29,196		32,087
Pool #D97258 5.500% 4/01/27		11,360		12,485
Pool #C91074 5.500% 8/01/27		3,058		3,360
Pool #D97417 5.500% 10/01/27		9,979		10,976
Pool #C91128 5.500% 12/01/27		1,556		1,712
Pool #C91148 5.500% 1/01/28		72,924		80,213
Pool #C91176 5.500% 5/01/28		25,011		27,511
Pool #C91217 5.500% 11/01/28		9,390		10,343
Pool #C01079 7.500% 10/01/30		1,106		1,289
Pool #C01135 7.500% 2/01/31		4,701		5,457
Federal National Mortgage Association
Pool #MA3797 2.500% 10/01/34		12,883,427		13,372,975
Pool #MA3029 3.000% 6/01/32		3,573,219		3,751,735
Pool #MA3090 3.000% 8/01/32		1,512,085		1,587,628
Pool #AO8180 3.000% 9/01/42		29,421		31,142
Pool #AP8668 3.000% 12/01/42		167,493		177,290
Pool #AR1975 3.000% 12/01/42		39,482		41,791
Pool #AB7401 3.000% 12/01/42		138,681		146,793
Pool #AB7397 3.000% 12/01/42		153,597		162,581
Pool #AR0306 3.000% 1/01/43		10,765		11,395
Pool #AR5391 3.000% 1/01/43		86,402		91,455
Pool #AL3215 3.000% 2/01/43		127,940		135,424
Pool #AR4109 3.000% 2/01/43		139,240		147,384
Pool #AR4432 3.000% 3/01/43		51,638		54,658
Pool #AT0169 3.000% 3/01/43		214,844		227,410
Pool #AB8809 3.000% 3/01/43		68,083		72,065
Pool #MA1368 3.000% 3/01/43		234,553		248,272
Pool #AR2174 3.000% 4/01/43		252,451		267,216
Pool #AS1304 3.500% 12/01/28		1,118,141		1,181,809
Pool #AV1897 3.500% 12/01/28		199,093		210,678
Pool #AV2325 3.500% 12/01/28		574,692		607,416
Pool #BF0196 3.500% 2/01/41		1,145,461		1,230,601
Pool #MA1356 3.500% 2/01/43		8,603,544		9,229,582
Pool #CA1073 3.500% 1/01/48		11,591,495		12,271,945
Pool #BJ0686 4.000% 4/01/48		2,637,011		2,817,300
Pool #CA1951 4.000% 7/01/48		3,292,448		3,514,462
Pool #888586 1 year CMT + 2.196% 4.328% FRN 10/01/34		82,532		86,553
Pool #725692 1 year CMT + 2.138% 4.355% FRN 10/01/33		66,498		69,738
Pool #AA3980 4.500% 4/01/28		55,606		59,958
Pool #CA1952 4.500% 6/01/48		2,218,585		2,388,786
Pool #CA1909 4.500% 6/01/48		7,342,280		7,912,435
Pool #BK7877 4.500% 7/01/48		1,522,132		1,638,904
Pool #MA3537 4.500% 12/01/48		3,590,235		3,858,933
Pool #MA3564 4.500% 1/01/49		3,231,094		3,472,913
Pool #BN5241 4.500% 2/01/49		16,110,768		17,316,517
Pool #MA3639 4.500% 4/01/49		2,808,633		3,018,834
Pool #775539 12 mo. USD LIBOR + 1.636% 4.511% FRN 5/01/34		27,445		28,624
Pool #AD6437 5.000% 6/01/40		403,118		446,052
Pool #AD6996 5.000% 7/01/40		2,700,238		2,987,830
Pool #AL8173 5.000% 2/01/44		1,112,871		1,223,400
Pool #AD0836 5.500% 11/01/28		56,741		62,392
Pool #575667 7.000% 3/01/31		11,319		13,142
Pool #529453 7.500% 1/01/30		2,405		2,809
Pool #535996 7.500% 6/01/31		4,349		5,073
Pool #252926 8.000% 12/01/29		122		140
Pool #532819 8.000% 3/01/30		116		135
Pool #534703 8.000% 5/01/30		2,479		2,872
Pool #253437 8.000% 9/01/30		115		133
Pool #253481 8.000% 10/01/30		65		76
Pool #602008 8.000% 8/01/31		3,517		4,080
Pool #190317 8.000% 8/01/31		2,562		2,977
Pool #597220 8.000% 9/01/31		2,929		3,424
Government National Mortgage Association
Pool #371146 7.000% 9/15/23		65		68
Pool #352022 7.000% 11/15/23		2,780		2,955
Pool #374440 7.000% 11/15/23		219		233
Pool #491089 7.000% 12/15/28		7,019		7,656
Pool #480539 7.000% 4/15/29		363		410
Pool #488634 7.000% 5/15/29		2,021		2,284
Pool #500928 7.000% 5/15/29		3,202		3,647
Pool #499410 7.000% 7/15/29		1,147		1,310
Pool #510083 7.000% 7/15/29		800		907
Pool #493723 7.000% 8/15/29		2,332		2,665
Government National Mortgage Association I      Pool #581417  7.000% 7/15/32		11,075		12,686
Government National Mortgage Association II
Pool #008746 1 year CMT + 1.500% 3.125% FRN 11/20/25		3,067		3,144
Pool #080136 1 year CMT + 1.500% 3.125% FRN 11/20/27		682		702
Government National Mortgage Association II TBA
Pool #304 3.500% 10/01/48  (d)		79,550,000		83,881,744
Pool #1235 4.000% 9/01/48  (d)		38,350,000		40,740,885
				241,317,833
Whole Loans — 0.3%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2016-HQA3, Class M2, 1 mo. USD LIBOR + 1.350% 2.297% FRN 3/25/29		361,595		357,478
Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050% 2.997% FRN 7/25/49  (a)		828,856		695,140
Federal National Mortgage Association Connecticut Avenue Securities Trust, Series 2019-R01, Class 2M2, 1 mo. USD LIBOR + 2.450%
3.397% FRN 7/25/31  (a)		2,127,776		1,756,323
				2,808,941
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $241,485,510)				247,197,146

MML Managed Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
U.S. Treasury Obligations — 1.6%
U.S. Treasury Bonds & Notes — 1.6%
U.S. Treasury Bond
2.250% 8/15/49 (f)	$	7,000,000	$	8,491,144
3.500% 2/15/39 (f)		2,300,000		3,267,305
U.S. Treasury Note
1.625% 8/15/29		3,000,000		3,251,146
				15,009,595
TOTAL U.S. TREASURY OBLIGATIONS (Cost $13,168,918)				15,009,595
TOTAL BONDS & NOTES (Cost $987,741,940)				944,921,161
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $2,989,580)				1,829,518

	Number of Shares
Mutual Funds — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Prime Portfolio (g)		2,288,213	2,288,213
TOTAL MUTUAL FUNDS (Cost $2,288,213)			2,288,213
TOTAL LONG-TERM INVESTMENTS (Cost $995,394,733)			951,353,092

	Principal Amount
Short-Term Investments — 13.8%
Commercial Paper — 13.8%
Avangrid, Inc.
1.318% 4/03/20 (a)	$	10,000,000		9,997,854
Boeing Co.
1.983% 4/07/20 (a)		3,000,000		2,997,958
2.059% 5/20/20 (a)		1,000,000		994,699
2.092% 6/10/20 (a)		8,000,000		7,937,678
CenterPoint Energy, Inc.
1.770% 4/15/20 (a)		1,000,000		998,696
1.788% 4/06/20 (a)		4,000,000		3,998,071
Daimler Finance North America LLC
2.942% 4/06/20 (a)		10,000,000		9,995,427
DuPont de Nemours, Inc.
1.821% 4/13/20 (a)		3,000,000		2,996,344
El Dupont
1.812% 5/22/20 (a)		4,000,000		3,981,112
Entergy Corp.
1.811% 5/04/20 (a)		4,000,000		3,993,793
1.814% 5/21/20 (a)		4,000,000		3,990,367
1.834% 5/01/20 (a)		4,000,000		3,994,375
FMC Tech, Inc.
1.983% 4/08/20 (a)		1,000,000		999,365
1.984% 4/07/20 (a)		1,000,000		999,455
General Electric Co.
1.844% 5/20/20		2,000,000		1,990,833
1.867% 6/17/20		5,000,000		4,964,250
1.905% 5/04/20		2,000,000		1,993,767
Harley-Davidson, Inc.
2.282% 4/02/20 (a)		4,000,000		3,999,639
HP, Inc.
1.830% 4/06/20 (a)		4,000,000		3,998,097
Nextera Energy Cap Hldgs, Inc.
1.873% 4/13/20 (a)		4,000,000		3,995,467
NiSource, Inc.
1.809% 4/08/20 (a)		9,000,000		8,994,288
Parker-Hannifin Corp.
4.482% 5/01/20 (a)		10,000,000		9,988,780
Suncor Energy, Inc.
1.813% 5/13/20 (a)		6,000,000		5,976,350
Transcanada Pipelines Ltd.
1.813% 5/21/20 (a)		3,000,000		2,985,975
ViacomCBS, Inc.
1.523% 4/15/20 (a)		8,000,000		7,989,167
VW Credit, Inc.
1.826% 6/12/20 (a)		8,000,000		7,946,467
Walgreens Boots Alliance, Inc.
2.131% 4/30/20		8,000,000		7,978,000
				130,676,274
TOTAL SHORT-TERM INVESTMENTS (Cost $130,784,987)				130,676,274
TOTAL INVESTMENTS — 114.0% (Cost $1,126,179,720) (h)				1,082,029,366
Other Assets/(Liabilities) — (14.0)%				(132,909,705	)
NET ASSETS — 100.0%			$	949,119,661

Abbreviation Legend
ABS	Asset-Backed Security
ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
FRN	Floating Rate Note
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note
WL	Whole Loan

MML Managed Bond Fund —  Portfolio of Investments (Continued)

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 March 31, 2020, the aggregate market value of these securities amounted to $477,785,206 or 50.34% of net assets.
(b)	Security is perpetual and has no stated maturity date.
(c)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $2,538,082 or 0.27% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $305,089 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)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(e)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at March 31, 2020.
(f)	A portion of this security is pledged/held as collateral for open derivatives.
(g)	Represents investment of security lending cash collateral. (Note 2).
(h)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	3,700,000	$	596,440	$	184,971	$	411,469
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	56,100,000	$	1,233,078	$	2,804,608	$	(1,571,530)
									$	1,829,518	$	2,989,579	$	(1,160,061)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Ultra 10 Year	6/19/20		62	$	9,596,450		$	77,487
U.S. Treasury Ultra Bond	6/19/20		344		66,933,050			9,391,950
U.S. Treasury Note 2 Year	6/30/20		745		162,573,064			1,612,131
U.S. Treasury Note 5 Year	6/30/20		344		42,349,438			774,187
							$	11,855,755
Short
90 Day Eurodollar	6/15/20		11	$	(2,680,595	)	$	(54,967	)
U.S. Treasury Long Bond	6/19/20		118		(19,867,318	)		(1,262,057	)
90 Day Eurodollar	9/14/20		10		(2,437,967	)		(53,158	)
90 Day Eurodollar	12/14/20		10		(2,437,842	)		(53,658	)
90 Day Eurodollar	3/15/21		9		(2,194,845	)		(48,742	)
90 Day Eurodollar	9/13/21		17		(4,146,456	)		(90,582	)
90 Day Eurodollar	3/14/22		15		(3,657,513	)		(79,550	)
90 Day Eurodollar	9/19/22		14		(3,412,279	)		(73,021	)
90 Day Eurodollar	3/13/23		12		(2,923,010	)		(61,990	)
90 Day Eurodollar	12/18/23		15		(3,650,388	)		(76,925	)
90 Day Eurodollar	12/16/24		40		(9,722,367	)		(201,633	)
							$	(2,056,283	)

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 34†	1.000%	Quarterly	6/20/25	USD	4,000,000	$	26,624	$	14,206	$	12,418
CDX.NA.IG Series 34†	1.000%	Quarterly	6/20/25	USD	5,000,000		17,365		21,743		(4,378	)
						$	43,989	$	35,949	$	8,040

† 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

March 31, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 95.1%
Corporate Debt — 38.8%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.  3.750% 10/01/21	$	200,000	$	201,929
Agriculture — 1.4%
BAT Capital Corp.  3.222% 8/15/24		415,000		399,352
Bunge Ltd. Finance Corp.  3.500% 11/24/20		930,000		937,701
Imperial Brands Finance PLC  3.125% 7/26/24 (a)		400,000		376,912
3.500% 2/11/23 (a)		387,000		388,295
Reynolds American, Inc.  4.000% 6/12/22		540,000		547,611
				2,649,871
Airlines — 0.0%
American Airlines Pass-Through Trust, Series 2014-1, Class B,  4.375% 4/01/24		22,307		20,884
Auto Manufacturers — 1.7%
Ford Motor Credit Co. LLC  3 mo. USD LIBOR + .810% 2.710% FRN 4/05/21		405,000		374,625
3 mo. USD LIBOR + 1.235% 2.927% FRN 2/15/23		275,000		206,135
3.087% 1/09/23		260,000		239,200
3.350% 11/01/22		365,000		340,362
General Motors Financial Co., Inc.  3.250% 1/05/23		970,000		880,018
Hyundai Capital America  2.375% 2/10/23 (a)		600,000		565,675
2.850% 11/01/22 (a)		320,000		312,489
Nissan Motor Acceptance Corp.  1.900% 9/14/21 (a)		200,000		188,983
				3,107,487
Banks — 7.8%
Banco Santander SA  3.500% 4/11/22		600,000		593,610
Bank of America Corp. 3 mo. USD LIBOR + .930%  2.816% VRN 7/21/23		1,910,000		1,917,852
Barclays Bank PLC  10.179% 6/12/21 (a)		504,000		538,426
Barclays PLC 3 mo. USD LIBOR + 1.380%  3.072% FRN 5/16/24		485,000		427,094
Citigroup, Inc. 3 mo. USD LIBOR + .722%  3.142% VRN 1/24/23		895,000		905,544
Credit Suisse AG  6.500% 8/08/23 (a)		930,000		943,559
Discover Bank  3.350% 2/06/23		673,000		664,749
4.200% 8/08/23		310,000		326,383
First Horizon National Corp.  3.500% 12/15/20		520,000		514,800
The Goldman Sachs Group, Inc.  3.200% 2/23/23		1,925,000		1,960,838
HSBC Holdings PLC  4.250% 3/14/24		495,000		507,949
JP Morgan Chase & Co.  4.500% 1/24/22		915,000		955,736
Mitsubishi UFJ Financial Group, Inc.  2.665% 7/25/22		820,000		817,258
Morgan Stanley  3.750% 2/25/23		940,000		974,492
Sumitomo Mitsui Financial Group, Inc.  2.448% 9/27/24		520,000		515,702
3.748% 7/19/23		321,000		334,207
Synchrony Bank  3.000% 6/15/22		470,000		466,754
Truist Bank  1.500% 3/10/25		1,045,000		1,009,435
				14,374,388
Beverages — 1.1%
Anheuser-Busch InBev Worldwide, Inc.  3.500% 1/12/24		875,000		914,534
Bacardi Ltd.  4.450% 5/15/25 (a)		83,000		87,229
Keurig Dr Pepper, Inc.  4.057% 5/25/23		625,000		650,142
Molson Coors Beverage Co.  2.100% 7/15/21		230,000		225,287
3.500% 5/01/22		197,000		196,937
				2,074,129
Building Materials — 0.4%
Martin Marietta Materials, Inc. 3 mo. USD LIBOR + .650%  2.333% FRN 5/22/20		295,000		292,890
Masco Corp.  3.500% 4/01/21		170,000		168,431
Standard Industries, Inc.  5.500% 2/15/23 (a)		246,000		237,390
				698,711
Chemicals — 1.4%
DuPont de Nemours, Inc.  4.205% 11/15/23		480,000		505,421
Huntsman International LLC  5.125% 11/15/22		960,000		984,000
RPM International, Inc.  3.450% 11/15/22		8,000		8,046
The Sherwin-Williams Co.  2.750% 6/01/22		27,000		26,942

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

	Principal Amount		Value
Syngenta Finance NV  3.698% 4/24/20 (a)	$	440,000	$	439,154
4.441% 4/24/23 (a)		570,000		536,962
				2,500,525
Commercial Services — 0.3%
The ADT Security Corp.  6.250% 10/15/21		490,000		478,975
Computers — 1.1%
Dell International LLC/EMC Corp.  4.000% 7/15/24 (a)		414,000		417,614
Genpact Luxembourg Sarl  3.375% 12/01/24		335,000		336,376
3.700% STEP 4/01/22		635,000		646,413
Leidos Holdings, Inc.  4.450% 12/01/20		635,000		631,825
				2,032,228
Diversified Financial Services — 2.9%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust  2.875% 8/14/24		845,000		672,786
Aircastle Ltd.  5.000% 4/01/23		1,010,000		986,065
Ameriprise Financial, Inc.  3.000% 3/22/22		165,000		167,065
3.700% 10/15/24		115,000		119,324
4.000% 10/15/23		105,000		111,117
Antares Holdings LP  6.000% 8/15/23 (a)		473,000		487,191
Avolon Holdings Funding Ltd.  2.875% 2/15/25 (a)		335,000		259,650
Brookfield Finance, Inc.  4.000% 4/01/24		580,000		577,243
LeasePlan Corp. NV  2.875% 10/24/24 (a)		280,000		274,282
Park Aerospace Holdings Ltd.  5.250% 8/15/22 (a)		1,250,000		1,129,520
Synchrony Financial  2.850% 7/25/22		605,000		574,425
				5,358,668
Electric — 0.9%
Ameren Corp.  2.500% 9/15/24		345,000		335,395
2.700% 11/15/20		455,000		453,642
Enel Finance International NV  2.875% 5/25/22 (a)		285,000		275,731
Entergy Texas, Inc.  2.550% 6/01/21		95,000		95,275
Puget Energy, Inc.  6.000% 9/01/21		260,000		266,663
6.500% 12/15/20		255,000		260,370
				1,687,076
Electronics — 0.1%
FLIR Systems, Inc.  3.125% 6/15/21		230,000		230,267
Foods — 0.3%
McCormick & Co., Inc.  2.700% 8/15/22		570,000		571,623
Household Products & Wares — 0.4%
Church & Dwight Co., Inc.  2.875% 10/01/22		701,000		689,943
Housewares — 0.5%
Newell Brands, Inc.  3.850% STEP 4/01/23		979,000		993,635
Insurance — 2.8%
American International Group, Inc.  3.750% 7/10/25		490,000		490,457
AmTrust Financial Services, Inc.  6.125% 8/15/23		620,000		612,369
Athene Global Funding  2.750% 6/25/24 (a)		1,020,000		1,020,850
CNA Financial Corp.  5.750% 8/15/21		443,000		454,002
Enstar Group Ltd.  4.500% 3/10/22		685,000		683,238
Jackson National Life Global Funding  2.500% 6/27/22 (a)		495,000		486,021
Lincoln National Corp.  4.000% 9/01/23		122,000		122,032
Reinsurance Group of America, Inc.  5.000% 6/01/21		400,000		414,881
Trinity Acquisition PLC  3.500% 9/15/21		600,000		578,365
Willis Towers Watson PLC  5.750% 3/15/21		190,000		194,689
				5,056,904
Investment Companies — 1.3%
Ares Capital Corp.  4.200% 6/10/24		953,000		844,789
BlackRock TCP Capital Corp.  3.900% 8/23/24		360,000		331,314
4.125% 8/11/22		675,000		692,442
TPG Specialty Lending, Inc.  3.875% 11/01/24		655,000		577,806
				2,446,351
Iron & Steel — 0.1%
Steel Dynamics, Inc.  2.800% 12/15/24		250,000		232,781
Lodging — 0.5%
Las Vegas Sands Corp.  3.200% 8/08/24		1,025,000		925,141

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

	Principal Amount		Value
Machinery – Diversified — 0.4%
CNH Industrial Capital LLC  3.875% 10/15/21	$	635,000	$	631,683
Media — 0.8%
Discovery Communications LLC  2.950% 3/20/23		435,000		437,522
Sirius XM Radio, Inc.  3.875% 8/01/22 (a)		1,047,000		1,043,074
				1,480,596
Mining — 1.1%
Glencore Finance Canada Ltd.  4.250% STEP 10/25/22 (a)		254,000		243,464
Glencore Funding LLC  4.125% 5/30/23 (a)		360,000		331,690
Kinross Gold Corp.  5.125% 9/01/21		370,000		370,925
5.950% 3/15/24		550,000		555,500
Newcrest Finance Pty Ltd.  4.200% 10/01/22 (a)		565,000		593,233
				2,094,812
Oil & Gas — 0.7%
Continental Resources, Inc.  5.000% 9/15/22		390,000		248,797
EQT Corp.  3.000% 10/01/22		565,000		471,775
6.125% STEP 2/01/25		320,000		246,432
Newfield Exploration Co.  5.625% 7/01/24		505,000		271,004
				1,238,008
Packaging & Containers — 0.4%
Graphic Packaging International LLC  4.750% 4/15/21		759,000		749,740
Pharmaceuticals — 2.3%
AbbVie, Inc.  2.300% 11/21/22 (a)		515,000		515,404
Allergan Funding SCS  3.800% 3/15/25		495,000		506,803
Becton Dickinson and Co. 3 mo. USD LIBOR + 0.875%  2.250% FRN 12/29/20		489,000		472,496
Cardinal Health, Inc. 3 mo. USD LIBOR + .770%  1.511% FRN 6/15/22		590,000		545,118
CVS Health Corp.  2.625% 8/15/24		175,000		177,480
3.700% 3/09/23		770,000		799,774
Mylan, Inc.  3.125% 1/15/23 (a)		525,000		509,160
Shire Acquisitions Investments Ireland DAC  2.875% 9/23/23		360,000		362,616
Teva Pharmaceutical Finance Netherlands III BV  2.200% 7/21/21		240,000		229,243
				4,118,094
Pipelines — 1.5%
Energy Transfer Operating LP  4.200% 9/15/23		960,000		838,584
EnLink Midstream Partners LP  4.400% 4/01/24		490,000		247,303
EQM Midstream Partners LP  4.750% 7/15/23		505,000		365,468
MPLX LP 3 mo. USD LIBOR + 1.100%  2.099% FRN 9/09/22		1,050,000		976,897
Plains All American Pipeline LP/PAA Finance Corp.  3.850% 10/15/23		384,000		332,700
				2,760,952
Private Equity — 0.3%
Hercules Capital, Inc.  4.625% 10/23/22		610,000		581,070
Real Estate Investment Trusts (REITS) — 1.9%
CubeSmart LP  4.375% 12/15/23		313,000		334,076
Essex Portfolio LP  3.500% 4/01/25		130,000		130,444
3.875% 5/01/24		170,000		170,400
SBA Tower Trust  2.836% 1/15/25 (a)		1,450,000		1,400,082
Service Properties Trust  4.350% 10/01/24		510,000		374,364
Tanger Properties LP  3.875% 12/01/23		510,000		531,371
VEREIT Operating Partnership LP  4.600% 2/06/24		570,000		562,521
				3,503,258
Retail — 1.8%
Advance Auto Parts, Inc.  4.500% 12/01/23		306,000		314,429
Dollar Tree, Inc.  3.700% 5/15/23		940,000		955,036
O’Reilly Automotive, Inc.  3.800% 9/01/22		123,000		123,735
3.850% 6/15/23		873,000		870,125
QVC, Inc.  4.375% 3/15/23		1,060,000		1,002,458
				3,265,783

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

	Principal Amount		Value
Semiconductors — 0.6%
Broadcom Corp./Broadcom Cayman Finance Ltd.  3.000% 1/15/22	$	390,000	$	385,659
Microchip Technology, Inc.  3.922% 6/01/21		390,000		380,010
NXP BV/NXP Funding LLC  4.125% 6/01/21 (a)		370,000		373,326
				1,138,995
Telecommunications — 0.9%
Qwest Corp  6.750% 12/01/21		485,000		502,606
Sprint Communications, Inc.  9.250% 4/15/22		330,000		353,100
Telefonaktiebolaget LM Ericsson  4.125% 5/15/22		828,000		819,752
				1,675,458
Transportation — 0.4%
Ryder System, Inc.  3.400% 3/01/23		175,000		176,584
3.750% 6/09/23		482,000		483,821
				660,405
Trucking & Leasing — 0.6%
DAE Funding LLC  4.000% 8/01/20 (a)		205,000		200,900
Penske Truck Leasing Co. LP/PTL Finance Corp.  4.875% 7/11/22 (a)		816,000		848,603
				1,049,503
TOTAL CORPORATE DEBT (Cost $74,218,109)				71,279,873
Municipal Obligations — 0.3%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR + 0.000%  2.694% FRN 4/26/27		17,726		17,722
Pennsylvania Higher Education Assistance Agency, Series 2006-2, Class B, 28 day ARS  2.273% FRN 10/25/42		450,000		444,442
TOTAL MUNICIPAL OBLIGATIONS (Cost $461,539)				462,164
Non-U.S. Government Agency Obligations — 54.0%
Auto Floor Plan ABS — 0.5%
Navistar Financial Dealer Note Master Owner Trust II Series 2019-1, Class C, 1 mo. USD LIBOR + .950% 1.897% FRN 5/25/24 (a)		236,000		231,530
Series 2018-1, Class C, 1 mo. USD LIBOR + 1.050% 1.997% FRN 9/25/23 (a)		160,000		157,074
Series 2019-1, Class D, 1 mo. USD LIBOR + 1.450% 2.397% FRN 5/25/24 (a)		214,000		209,824
Series 2018-1, Class D, 1 mo. USD LIBOR + 1.550% 2.497% FRN 9/25/23 (a)		230,000		225,805
				824,233
Automobile ABS — 7.3%
American Credit Acceptance Receivables Trust Series 2017-4, Class C, 2.940% 1/10/24 (a)		170,931		170,929
Series 2019-1, Class C, 3.500% 4/14/25 (a)		675,000		665,877
AmeriCredit Automobile Receivables Trust Series 2020-1, Class D, 1.800% 12/18/25		947,000		938,092
Series 2019-3, Class D, 2.580% 9/18/25		588,000		547,120
Avis Budget Rental Car Funding AESOP LLC Series 2020-1A, Class C, 3.020% 8/20/26 (a)		1,259,000		1,188,505
Series 2019-3A, Class C, 3.150% 3/20/26 (a)		1,083,000		1,076,342
Series 2019-1A, Class C, 4.530% 3/20/23 (a)		233,000		229,666
Series 2018-1A, Class C, 4.730% 9/20/24 (a)		500,000		478,941
Canadian Pacer Auto Receivables Trust, Series 2018-2A, Class B 3.630% 1/19/24 (a)		180,000		182,705
Carmax Auto Owner Trust, Series 2019-4, Class D 2.800% 4/15/26		560,000		515,706
Carvana Auto Receivables Trust, Series 2019-4A, Class D 3.070% 7/15/25 (a)		719,000		702,359
Drive Auto Receivables Trust Series 2019-4, Class D, 2.700% 2/16/27		550,000		515,427
Series 2019-1, Class C, 3.780% 4/15/25		525,000		516,466
DT Auto Owner Trust, Series 2019-1A, Class C 3.610% 11/15/24 (a)		100,000		100,664
Exeter Automobile Receivables Trust Series 2019-3A, Class D, 3.110% 8/15/25 (a)		400,000		393,312
Series 2018-2A, Class B, 3.270% 5/16/22 (a)		36,024		36,024
Series 2019-1A, Class B, 3.450% 2/15/23 (a)		165,000		161,987
Flagship Credit Auto Trust, Series 2017-1, Class B 2.830% 3/15/23 (a)		18,690		18,690
Hertz Fleet Lease Funding LP, Series 2019-1, Class D 3.440% 1/10/33 (a)		649,000		646,345
Hertz Vehicle Financing II LP, Series 2017-1A, Class B 3.560% 10/25/21 (a)		910,000		882,252
Hertz Vehicle Financing LLC, Series 2018-3A, Class B 4.370% 7/25/24 (a)		330,000		297,539
Hertz Vehicle Financing LP Series 2019-3A, Class B, 3.030% 12/26/25 (a)		410,000		406,849
Series 2016-2A, Class C, 4.990% 3/25/22 (a)		1,800,000		1,812,159
Oscar US Funding X LLC, Series 2019-1A, Class A4 3.270% 5/11/26 (a)		500,000		523,612
Santander Revolving Auto Loan Trust Series 2019-A, Class B, 2.800% 1/26/32 (a)		170,000		167,040
Series 2019-A, Class C, 3.000% 1/26/32 (a)		101,000		99,235
Series 2019-A, Class D, 3.450% 1/26/32 (a)		215,000		211,219
				13,485,062
Commercial MBS — 4.1%
BAMLL Commercial Mortgage Securities Trust Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 2.055% FRN 9/15/34 (a)		130,000		106,956
Series 2019-BPR, Class CMP, 4.024% VRN 11/05/32 (a) (b)		370,000		344,906
Series 2019-BPR, Class DMP, 4.024% VRN 11/05/32 (a) (b)		450,000		383,377
BHMS Mortgage Trust Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.955% FRN 7/15/35 (a)		770,000		642,883
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 2.205% FRN 7/15/35 (a)		950,000		759,897

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

	Principal Amount		Value
BX Commercial Mortgage Trust Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 2.305% FRN 12/15/36 (a)	$	767,000	$	674,941
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 2.405% FRN 11/15/35 (a)		728,000		664,296
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 2.505% FRN 10/15/36 (a)		301,907		264,161
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.705% FRN 10/15/36 (a)		846,485		727,952
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150% 2.855% FRN 12/15/37 (a)		545,194		449,785
Commercial Mortgage Trust Series 2014-CR14, Class A2, 3.147% 2/10/47		90,654		90,527
Series 2015-DC1, Class AM, 3.724% 2/10/48		480,000		475,826
Series 2015-DC1, Class B, 4.035% VRN 2/10/48 (b)		333,000		314,814
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600% 2.305% FRN 5/15/36 (a)		200,000		177,996
GCCFC Commercial Mortgage Trust, Series 2006-GG7, Class AM, 5.513% VRN 7/10/38 (b)		61,341		61,058
Hudson Yards Mortgage Trust, Series 2019-30HY, Class E, 3.443% VRN 7/10/39 (a) (b)		700,000		530,577
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800% 2.505% FRN 5/15/36 (a)		251,000		195,902
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2013-C7, Class B 3.769% 2/15/46		250,000		245,189
Morgan Stanley Capital I Trust, Series 2012-STAR, Class D 4.057% 8/05/34 (a)		400,000		380,804
MSCG Trust, Series 2018-SELF, Class C, 1 mo. USD LIBOR + 1.180% 1.885% FRN 10/15/37 (a)		90,000		78,260
Velocity Commercial Capital Loan Trust, Series 2016-2, Class AFX, 2.997% VRN 10/25/46 (b)		7,677		7,667
				7,577,774
Home Equity ABS — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + .240% 1.187% FRN 10/25/34 (a)		71,224		66,547
Other ABS — 23.9%
321 Henderson Receivables I LLC Series 2006-1A, Class A1, 1 mo. USD LIBOR + 0.200% 0.905% FRN 3/15/41 (a)		35,140		33,840
Series 2010-3A, Class A, 3.820% 12/15/48 (a)		177,115		183,205
AASET Trust, Series 2017-1A, Class A 3.967% 5/16/42 (a)		143,096		112,429
AASET US Ltd., Series 2018-2A, Class A 4.454% 11/18/38 (a)		648,904		515,250
Adams Outdoor Advertising LP, Series 2018-1, Class A 4.810% 11/15/48 (a)		390,938		389,844
American Tower Trust #1, Series 13, Class 2A 3.070% 3/15/48 (a)		500,000		492,226
Arbys Funding LLC, Series 2015-1A, Class A2 4.969% 10/30/45 (a)		287,250		276,171
Ascentium Equipment Receivables Trust Series 2019-1A, Class D, 3.470% 5/12/25 (a)		164,000		162,111
Series 2018-2A, Class B, 3.760% 5/10/24 (a)		709,000		715,601
Series 2019-2A, Class E, 3.780% 5/10/27 (a)		669,000		663,711
Series 2018-2A, Class E, 5.180% 7/10/26 (a)		940,000		922,397
Avant Loans Funding Trust, Series 2019-A, Class A 3.480% 7/15/22 (a)		166,291		163,566
Bain Capital Credit CLO Ltd., Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 3.631% FRN 1/15/29 (a)		750,000		699,834
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class A2R, 3 mo. USD LIBOR + 1.750% 3.581% FRN 1/15/29 (a)		500,000		458,276
BRE Grand Islander Timeshare Issuer LLC Series 2017-1A, Class A, 2.940% 5/25/29 (a)		113,317		113,535
Series 2019-A, Class B, 3.780% 9/26/33 (a)		316,315		325,339
CAL Funding II Ltd., Series 2018-2A, Class A 4.340% 9/25/43 (a)		246,500		242,322
Capital Automotive REIT Series 2017-1A, Class A1, 3.870% 4/15/47 (a)		245,302		243,500
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)		613,254		610,414
CARS-DB4 LP, Series 2020-1A, Class B1 4.170% 2/15/50 (a)		484,000		440,440
Castlelake Aircraft Structured Trust, Series 2018-1, Class A 4.125% 6/15/43 (a)		305,418		221,953
Cbam Clo Management Cbam, Series 2018-6A, Class A1R, 3 mo. USD LIBOR + 1.270% 3.101% FRN 1/15/31 (a)		500,000		473,163
CIFC Funding 2015-IV Ltd., Series 2015-4A, Class A2R, 3.669% FRN 10/20/27 (a) (b)		300,000		283,320
CIFC Funding Ltd., Series 2017-3A, Class A1, 3 mo. USD LIBOR + 1.220% 3.039% FRN 7/20/30 (a)		500,000		474,836
CLI Funding VI LLC, Series 2017-1A, Class A 3.620% 5/18/42 (a)		419,422		344,891
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460% 1.407% FRN 9/25/34		2,077		1,710
DB Master Finance LLC Series 2019-1A, Class A2I, 3.787% 5/20/49 (a)		273,930		259,117
Series 2019-1A, Class A2II, 4.021% 5/20/49 (a)		323,555		299,708
Denali Capital CLO X LLC, Series 2013-1A, Class A1, 3 mo. USD LIBOR + 1.050% 2.844% FRN 10/26/27 (a)		350,000		339,962
Diamond Resorts Owner Trust Series 2019-1A, Class A, 2.890% 2/20/32 (a)		492,275		493,840
Series 2016-1, Class A, 3.080% 11/20/28 (a)		216,098		213,105
Series 2018-1, Class A, 3.700% 1/21/31 (a)		174,172		177,081
Domino’s Pizza Master Issuer LLC Series 2017-1A, Class A2II, 3.082% 7/25/47 (a)		342,125		336,474
Series 2018-1A, Class A2I, 4.116% 7/25/48 (a)		354,600		340,542
Elara HGV Timeshare Issuer LLC Series 2017-A, Class A, 2.690% 3/25/30 (a)		122,958		123,749
Series 2016-A, Class A, 2.730% 4/25/28 (a)		227,528		227,793
Series 2017-A, Class B, 2.960% 3/25/30 (a)		364,321		361,988
Series 2014-A, Class B, 3.020% VRN 2/25/27 (a) (b)		34,511		33,934
Series 2019-A, Class C, 3.450% 1/25/34 (a)		767,577		771,290
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450% 3.269% FRN 4/20/31 (a)		350,000		327,085
FCI Funding LLC, Series 2019-1A, Class A 3.630% 2/18/31 (a)		129,213		128,997

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

	Principal Amount		Value
Galaxy XX CLO Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + 1.000% 2.819% FRN 4/20/31 (a)	$	600,000	$	563,584
Global SC Finance II SRL, Series 2013-1A, Class A 2.980% 4/17/28 (a)		90,958		89,329
Global SC Finance IV Ltd., Series 2017-1A, Class A 3.850% 4/15/37 (a)		241,476		241,319
Goodgreen Trust Series 2019-2A, Class A, 2.760% 10/15/54 (a)		611,486		579,398
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		325,773		317,000
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		306,756		309,325
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (b)		275,473		280,315
Hero Funding Trust Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		200,201		196,629
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		201,310		208,267
Series 2015-1A, Class A, 3.840% 9/21/40 (a)		433,406		447,309
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		360,786		374,799
Hilton Grand Vacations Trust, Series 2017-AA, Class B 2.960% 12/26/28 (a)		144,131		144,614
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A 4.458% 12/15/38 (a)		533,423		390,520
Horizon Aircraft Finance III Ltd, Series 2019-2, Class B, ABS, 144A 4.458% 11/15/39 (a)		687,500		421,313
KDAC Aviation Finance Ltd., Series 2017-1A, Class A 4.212% 12/15/42 (a)		193,458		148,195
KREF Ltd., Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 2.150% FRN 6/15/36 (a)		1,150,000		998,669
Lendmark Funding Trust, Series 2018-1A, Class A 3.810% 12/21/26 (a)		350,000		343,104
Lunar Aircraft Ltd., Series 2020-1A, Class A 3.376% 2/15/45 (a)		337,000		235,614
MACH 1 Cayman Ltd., Series 2019-1, Class A 3.474% 10/15/39 (a)		388,914		271,886
Madison Park Funding XXIII Ltd., Series 2017-23A, Class B, 3 mo. USD LIBOR + 1.700% 3.494% FRN 7/27/30 (a)		500,000		459,773
Mariner Finance Issuance Trust, Series 2018-AA, Class A 4.200% 11/20/30 (a)		903,000		884,546
Marlette Funding Trust Series 2019-2A, Class A, 3.130% 7/16/29 (a)		104,276		100,103
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		146,000		134,358
Mosaic Solar Loans LLC Series 2018-2GS, Class A, 4.200% 2/22/44 (a)		252,248		254,290
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		66,421		64,929
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class BR, 3 mo. USD LIBOR + 1.250% 3.081% FRN 1/15/28 (a)		600,000		571,348
New Residential Advance Receivables Trust Advance Receivables Backed Series 2019-T3, Class CT3, 2.710% 9/15/52 (a)		344,000		343,966
Series 2019-T4, Class DT4, 2.804% 10/15/51 (a)		714,000		713,989
Series 2019-T3, Class DT3, 3.055% 9/15/52 (a)		600,000		601,818
Series 2019-T2, Class DT2, 3.060% 8/15/53 (a)		220,000		206,009
NP SPE II LLC Series 2019-1A, Class A1, 2.574% 9/20/49 (a)		223,062		212,851
Series 2017-1A, Class A1, 3.372% 10/21/47 (a)		143,712		139,918
OCP CLO Ltd., Series 2015-8A, Class A2AR, 3 mo. USD LIBOR + 1.450% 3.286% FRN 4/17/27 (a)		650,000		627,838
OneMain Financial Issuance Trust Series 2019-2A, Class A, 3.140% 10/14/36 (a)		1,500,000		1,477,371
Series 2019-2A, Class C, 3.660% 10/14/36 (a)		600,000		586,696
Orange Lake Timeshare Trust Series 2016-A, Class A, 2.610% 3/08/29 (a)		422,982		407,054
Series 2016-A, Class B, 2.910% 3/08/29 (a)		173,452		170,360
Series 2019-A, Class D, 4.930% 4/09/38 (a)		568,742		369,749
Oxford Finance Funding Trust Series 2020-1A, Class A2, 3.101% 2/15/28 (a)		281,000		279,637
Series 2016-1A, Class A, 3.968% 6/17/24 (a)		41,148		41,047
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850% 3.797% FRN 2/25/23 (a)		250,000		229,292
Recette Clo Ltd., Series 2015-1A, Class CR, 3 mo. USD LIBOR + 1.700% 3.519% FRN 10/20/27 (a)		250,000		231,746
Rockford Tower CLO Ltd., Series 2017-3A, Class A, 3 mo. USD LIBOR + 1.190% 3.009% FRN 10/20/30 (a)		1,000,000		941,421
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090% 2.921% FRN 1/15/30 (a)		400,000		378,551
RR 6 Ltd., Series 2019-6A, Class A2, 3.751% FRN 4/15/30 (a) (b)		250,000		233,147
SBA Tower Trust, Series 2014-2A, Class C, 3.869% STEP 10/15/49 (a)		430,000		435,176
Sierra Receivables Funding LLC Series 2016-2A, Class B, 2.780% 7/20/33 (a)		109,787		108,941
Series 2017-1A, Class A, 2.910% 3/20/34 (a)		186,401		184,404
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		438,696		429,023
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		12,060		11,922
Series 2019-2A, Class C, 3.120% 5/20/36 (a)		76,342		74,026
Series 2018-1A, Class B, 4.236% 4/20/35		400,968		396,579
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		344,859		342,737
SoFi Consumer Loan Program Trust Series 2016-2A, Class A, 3.090% 10/27/25 (a)		28,720		28,817
Series 2016-1A, Class A, 3.260% 8/25/25 (a)		209,392		208,284
Series 2017-2, Class A, 3.280% 2/25/26 (a)		95,983		95,576
Series 2019-3, Class D, 3.890% 5/25/28 (a)		772,000		771,658
Store Master Funding I-VII, Series 2018-1A, Class A3 4.400% 10/20/48 (a)		516,317		495,781
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + 0.800% 1.747% FRN 11/25/35 (a)		283,436		265,656
Taco Bell Funding LLC, Series 2018-1A, Class A2I 4.318% 11/25/48 (a)		987,500		951,694
TAL Advantage V LLC, Series 2014-2A, Class A2 3.330% 5/20/39 (a)		238,333		233,266
TAL Advantage VI LLC, Series 2017-1A, Class A 4.500% 4/20/42 (a)		351,754		355,570
TLF National Tax Lien Trust, Series 2017-1A, Class A 3.090% 12/15/29 (a)		438,769		437,295
Trafigura Securitisation Finance PLC Series 2018-1A, Class A1, 1 mo. USD LIBOR + .730% 1.435% FRN 3/15/22 (a)		610,000		607,512
Series 2017-1A, Class B, 1 mo. USD LIBOR + 1.700% 2.405% FRN 12/15/20 (a)		260,000		258,409
Series 2018-1A, Class B, 4.290% 3/15/22 (a)		920,000		915,339
Treman Park CLO Ltd., Series 2015-1A, Class ARR, 3 mo. USD LIBOR + 1.070% 2.889% FRN 10/20/28 (a)		1,000,000		967,729

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

	Principal Amount		Value
Trinity Rail Leasing LP Series 2018-1A, Class A1, 3.820% 6/17/48 (a)	$	494,544	$	495,798
Series 2019-1A, Class A, 3.820% 4/17/49 (a)		657,778		612,129
Trip Rail Master Funding LLC Series 2017-1A, Class A1, 2.709% 8/15/47 (a)		79,627		78,750
Series 2011-1A, Class A2, 6.024% 7/15/41 (a)		668,991		691,790
Triton Container Finance LLC Series 2017-2A, Class A, 3.620% 8/20/42 (a)		791,204		794,179
Series 2018-2A, Class A, 4.190% 6/22/43 (a)		453,750		450,500
VSE VOI Mortgage LLC, Series 2018-A, Class C 4.020% 2/20/36 (a)		188,357		195,023
Welk Resorts LLC Series 2015-AA, Class A, 2.790% 6/16/31 (a)		41,157		40,462
Series 2017-AA, Class B, 3.410% 6/15/33 (a)		137,757		135,144
Westgate Resorts LLC Series 2017-1A, Class A, 3.050% 12/20/30 (a)		116,079		112,731
Series 2018-1A, Class A, 3.380% 12/20/31 (a)		231,311		226,162
Willis Engine Structured Trust IV, Series 2018-A, Class A, 4.750% STEP 9/15/43 (a)		234,734		163,967
				43,793,574
Student Loans ABS — 10.3%
Access Group Inc. Series 2003-A, Class A3, 3 mo. CMT + 1.200% 1.220% FRN 7/01/38		3,726		3,722
Series 2004-A, Class A3, 28 day ARS,FRN 1.699% 7/01/39		400,000		393,614
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 7/25/58 (a)		140,000		121,985
College Ave Student Loans LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 2.147% FRN 12/26/47 (a)		490,254		455,590
College Avenue Student Loans LLC Series 2017-A, Class A1, FRN, 1 mo. USD LIBOR + 1.650% 2.597% FRN 11/26/46 (a)		404,699		379,980
Series 2017-A, Class B, 4.500% 11/26/46 (a)		700,000		660,526
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + 0.490% 2.321% FRN 1/15/37		176,602		153,043
Commonbond Student Loan Trust Series 2019-AGS, Class B, 3.040% 1/25/47 (a)		622,000		595,815
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		55,281		53,253
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		59,513		57,789
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		73,060		69,843
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		107,907		104,293
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B 2.500% 1/25/30 (a)		61,691		60,397
DRB Prime Student Loan Trust, Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900% 2.847% FRN 10/25/44 (a)		272,029		268,691
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050% 2.997% FRN 2/26/35 (a)		64,867		60,944
ECMC Group Student Loan Trust, Series 2018-2A, Class A, 1 mo. USD LIBOR + .800% 1.747% FRN 9/25/68 (a)		422,539		367,214
EdLinc Student Loan Funding, Series 2017-A, Class A, Update Replacements.xls: PRIME - 1.150% 3.600% FRN 12/01/47 (a)		405,882		401,571
Educational Funding of the South, Inc., Series 2011-1, Class A2, 3 mo. USD LIBOR + .650% 2.444% FRN 4/25/35		374,960		352,462
ELFI Graduate Loan Program LLC, Series 2018-A, Class B 4.000% 8/25/42 (a)		250,000		246,260
Higher Education Funding I, Series 2004-1, Class B1, 28 day ARS 2.271% FRN 1/01/44 (a)		950,000		828,465
Laurel Road Prime Student Loan Trust Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		319,000		318,340
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		191,853		183,790
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		212,697		209,718
Navient Private Education Loan Trust, Series 2018-BA, Class A2B, 1 mo. USD LIBOR + .720% 1.425% FRN 12/15/59 (a)		170,000		161,536
Navient Student Loan Trust Series 2018-1A, Class A3, 1 mo. USD LIBOR + 0.720% 1.667% FRN 3/25/67 (a)		850,000		794,854
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.847% FRN 12/27/67 (a)		400,000		372,218
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 2.097% FRN 3/25/66 (a)		729,354		639,247
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 2.097% FRN 7/26/66 (a)		1,300,000		1,134,561
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 2.197% FRN 6/25/65 (a)		583,367		533,542
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 2.247% FRN 3/25/66 (a)		560,000		519,584
Series 2018-A, Class A1, 2.530% 2/18/42 (a)		50,689		48,526
Nelnet Private Education Loan Trust Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 2.697% FRN 12/26/40 (a)		131,551		124,399
Series 2016-A, Class A1B, 3.600% 12/26/40 (a)		94,728		94,747
Nelnet Student Loan Trust Series 2007-2A, Class A4A2, 28 day ARS 2.061% FRN 6/25/35 (a)		600,000		521,099
Series 2014-1A, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 10/25/47 (a)		270,000		251,691
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 2.447% FRN 6/25/54 (a)		130,000		121,262
SLC Student Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .200% 1.892% FRN 2/15/45		315,899		281,098
SLM Student Loan Trust Series 2006-2, Class R, 0.000% 1/25/41		1,396		698,000
Series 2005-5, Class A4, 3 mo. USD LIBOR + 0.140% 1.934% FRN 10/25/28		185,437		175,358
Series 2006-7, Class B, 3 mo. USD LIBOR + .200% 1.994% FRN 1/27/42		952,813		839,152
Series 2006-5, Class B, 3 mo. USD LIBOR + .210% 2.004% FRN 10/25/40		379,970		339,315
Series 2005-6, Class B, 3 mo. USD LIBOR + .290% 2.084% FRN 1/25/44		517,044		457,769
Series 2003-14, Class A6, 3 mo. USD LIBOR + 0.300% 2.094% FRN 7/25/25		101,981		96,719
Series 2005-9, Class B, 3 mo. USD LIBOR + .300% 2.094% FRN 1/25/41		385,494		339,300
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 2.104% FRN 1/25/55		152,662		135,646

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

	Principal Amount		Value
SMB Private Education Loan Trust Series 2018-C, Class A2B, 1 mo. USD LIBOR + .750% 1.455% FRN 11/15/35 (a)	$	500,000	$	440,219
Series 2019-A, Class A2B, 1 mo. USD LIBOR + 0.870% 1.575% FRN 7/15/36 (a)		504,000		443,720
Series 2019-B, Class A2B, 1 mo. USD LIBOR + 1.000% 1.705% FRN 6/15/37 (a)		500,000		435,031
Series 2016-C, Class A2B, 1 mo. USD LIBOR + 1.100% 1.805% FRN 9/15/34 (a)		189,227		170,389
Series 2014-A, Class A2B, 1 mo. USD LIBOR + 1.150% 1.855% FRN 5/15/26 (a)		198,004		178,416
Series 2016-B, Class A2B, 1 mo. USD LIBOR + 1.450% 2.155% FRN 2/17/32 (a)		83,265		74,976
SoFi Professional Loan Program LLC Series 2015-A, Class RC, 0.000% 3/25/33 (a)		200		165,000
Series 2017-D, Class R1, 0.000% 9/25/40 (a)		1,000,000		467,370
Series 2018-A, Class R1, 0.000% 2/25/42 (a)		1,000,000		702,500
Series 2018-D, Class R1, 0.000% 2/25/48 (a)		956,000		329,820
Series 2019-A, Class R1, 0.000% 6/15/48 (a)		1,314,800		401,360
Series 2016-D, Class A1, 1 mo. USD LIBOR + .950% 1.897% FRN 1/25/39 (a)		36,704		35,547
Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 2.147% FRN 6/25/33 (a)		60,064		57,475
				18,928,751
WL Collateral CMO — 7.9%
Angel Oak Mortgage Trust Series 2018-3, Class A3, 3.238% VRN 5/25/59 (a) (b)		323,488		313,669
Series 2019-6, Class M1, 3.389% VRN 11/25/59 (a) (b)		800,000		664,111
Bank of America Mortgage Securities, Series 2004-G, Class 2A7, 4.615% VRN 8/25/34 (b)		3,757		3,369
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000% 2.577% FRN 8/25/49 (a)		1,562,627		1,433,719
Citigroup Mortgage Loan Trust Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (b)		525,832		515,252
Series 2019-IMC1, Class M1, 3.170% VRN 7/25/49 (a) (b)		391,000		315,007
Countrywide Home Loans, Inc. Series 2004-2, Class 1A1, 3.722% VRN 2/25/34 (b)		3,387		3,019
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (b)		744		692
Deephaven Residential Mortgage Trust Series 2018-1A, Class A2, 3.027% VRN 12/25/57 (a) (b)		189,542		181,667
Series 2019-4A, Class M1, 3.484% VRN 10/25/59 (a) (b)		550,000		460,750
Series 2018-2A, Class A3, 3.684% VRN 4/25/58 (a) (b)		428,935		407,188
Series 2018-3A, Class A3, 3.963% VRN 8/25/58 (a) (b)		335,303		318,932
Series 2018-4A, Class A3, 4.285% VRN 10/25/58 (a) (b)		469,610		448,924
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1, 4.304% VRN 8/25/34 (b)		1,078		1,043
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A, 3.885% VRN 8/25/34 (b)		6,646		5,713
JP Morgan Mortgage Trust Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (b)		278,847		282,138
Series 2018-3, Class A5, 3.500% VRN 9/25/48 (a) (b)		439,195		444,429
Series 2018-4, Class A15, 3.500% VRN 10/25/48 (a) (b)		325,732		321,430
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (b)		367,476		371,978
Merrill Lynch Mortgage Investors, Inc. Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (b)		358		321
Series 2003-A4, Class IA, 4.678% VRN 7/25/33 (b)		364		323
New Residential Mortgage Loan Trust Series 2016-4A, Class A1, 3.750% VRN 11/25/56 (a) (b)		251,022		257,313
Series 2019-NQM2, Class A3, 3.752% VRN 4/25/49 (a) (b)		171,402		161,437
Series 2019-NQM1, Class A3, 3.928% VRN 1/25/49 (a) (b)		450,538		428,722
Onslow Bay Financial LLC, Series 2020-INV1, Class A21, 3.500% VRN 12/25/49 (a) (b)		753,019		782,080
PSMC Trust Series 2018-1, Class A3, 3.500% VRN 2/25/48 (a) (b)		429,232		420,712
Series 2018-2, Class A3, 3.500% VRN 6/25/48 (a) (b)		410,325		402,346
Sequoia Mortgage Trust Series 2015-1, Class A6, 2.500% VRN 1/25/45 (a) (b)		238,696		232,072
Series 2018-3, Class A4, 3.500% VRN 3/25/48 (a) (b)		475,070		470,340
Series 2018-5, Class A4, 3.500% VRN 5/25/48 (a) (b)		330,063		324,712
Series 2018-CH1, Class A10, 4.000% VRN 2/25/48 (a) (b)		184,312		183,248
Series 2018-CH2, Class A12, 4.000% VRN 6/25/48 (a) (b)		453,413		446,314
Series 2018-CH3, Class A11, 4.000% VRN 8/25/48 (a) (b)		225,604		223,433
Series 2018-7, Class A4, 4.000% VRN 9/25/48 (a) (b)		73,895		73,633
Series 2019-1, Class A4, 4.000% VRN 2/25/49 (a) (b)		62,114		60,785
Shellpoint Co-Originator Trust, Series 2016-1, Class 2A3, 3.000% VRN 10/25/31 (a) (b)		527,407		514,292
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (b)		550,230		521,750
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A, 3.854% VRN 3/25/34 (b)		3,888		3,494
TIAA Bank Mortgage Loan Trust, Series 2018-2, Class A4, 3.500% VRN 7/25/48 (a) (b)		197,292		192,420
Verus Securitization Trust Series 2020-1, Class M1, 3.021% VRN 1/25/60 (a) (b)		1,034,000		823,260
Series 2019-4, Class M1, 3.207% VRN 11/25/59 (a) (b)		430,000		347,283
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (b)		872,654		849,577
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (b)		265,000		210,157
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400% 3.366% FRN 4/25/44		9,752		8,732
				14,431,786
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $105,506,938)				99,107,727
U.S. Government Agency Obligations and Instrumentalities — 1.2%
Collateralized Mortgage Obligations — 0.1%
Government National Mortgage Association  Series 2014-131, Class BW 4.047% 5/20/41 (b)		94,155		97,611
Pass-Through Securities — 0.0%
Federal Home Loan Mortgage Corp. Pool #C01079 7.500% 10/01/30		211		246
Pool #C01135 7.500% 2/01/31		886		1,029
Federal National Mortgage Association Pool #888586 1 year CMT + 2.196% 4.328% FRN 10/01/34		15,613		16,374
Pool #725692 1 year CMT + 2.138% 4.355% FRN 10/01/33		12,642		13,258
Pool #775539 12 mo. USD LIBOR + 1.636% 4.511% FRN 5/01/34		5,228		5,452
Pool #575667 7.000% 3/01/31		2,156		2,503
Pool #529453 7.500% 1/01/30		459		535
Pool #535996 7.500% 6/01/31		826		964
Pool #252926 8.000% 12/01/29		19		22
Pool #532819 8.000% 3/01/30		27		32
Pool #534703 8.000% 5/01/30		461		534
Pool #253437 8.000% 9/01/30		23		27
Pool #253481 8.000% 10/01/30		10		12
Pool #190317 8.000% 8/01/31		478		556
Pool #602008 8.000% 8/01/31		669		776
Pool #597220 8.000% 9/01/31		570		666

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

	Principal Amount		Value
Government National Mortgage Association Pool #371146 7.000% 9/15/23	$	40	$	41
Pool #352022 7.000% 11/15/23		560		595
Pool #491089 7.000% 12/15/28		1,353		1,476
Pool #500928 7.000% 5/15/29		593		676
Pool #499410 7.000% 7/15/29		219		250
Pool #510083 7.000% 7/15/29		152		173
Pool #493723 7.000% 8/15/29		438		500
Government National Mortgage Association I  Pool #581417 7.000% 7/15/32		2,110		2,416
Government National Mortgage Association II Pool #008746 1 year CMT + 1.500% 3.125% FRN 11/20/25		586		601
Pool #080136 1 year CMT + 1.500% 3.125% FRN 11/20/27		125		129
				49,843
Whole Loans — 1.1%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes, Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050% 2.997% FRN 7/25/49 (a)		289,857		243,096
Federal National Mortgage Association Connecticut Avenue Securities Trust Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 3.097% FRN 9/25/31 (a)		585,062		499,011
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 3.247% FRN 8/25/31 (a)		1,350,681		1,158,135
Series 2019-R01, Class 2M2, 1 mo. USD LIBOR + 2.450% 3.397% FRN 7/25/31 (a)		294,706		243,258
				2,143,500
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $2,682,691)				2,290,954
U.S. Treasury Obligations — 0.8%
U.S. Treasury Bonds & Notes — 0.8%
U.S. Treasury Note  8.000% 11/15/21 (c)		1,220,000		1,373,800
TOTAL U.S. TREASURY OBLIGATIONS (Cost $1,395,661)				1,373,800
TOTAL BONDS & NOTES (Cost $184,264,938)				174,514,518
TOTAL PURCHASED OPTIONS (#) — 0.0% (Cost $147,532)				61,692
TOTAL LONG-TERM INVESTMENTS (Cost $184,412,470)				174,576,210
Short-Term Investments — 1.1%
Commercial Paper — 1.1%
Avangrid, Inc. 1.318% 4/03/20 (a)		2,000,000		1,999,571
				1,999,571
TOTAL SHORT-TERM INVESTMENTS (Cost $1,999,856)				1,999,571
TOTAL INVESTMENTS — 96.2% (Cost $186,412,326) (d)				176,575,781
Other Assets/(Liabilities) — 3.8%				6,934,204
NET ASSETS — 100.0%			$	183,509,985

Abbreviation Legend
ABS	Asset-Backed Security
ARS	Auction Rate Security
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
FRN	Floating Rate Note
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
STEP	Step Up Bond
VRN	Variable Rate Note
WL	Whole Loan

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

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 March 31, 2020, the aggregate market value of these securities amounted to $109,357,582 or 59.59% 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 March 31, 2020.
(c)	A portion of this security is pledged/held as collateral for open derivatives.
(d)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased 

Paid by Fund

Received by Fund

Description

Counterparty

Expiration Date

Rate

Frequency

Rate

Frequency

Notional Amount

Value

Premium Paid (Received)

Unrealized Appreciation/ (Depreciation)

Put

10-Year Interest Rate Swap, 2/02/43

Credit Suisse International

1/31/33

3.11%

Semi-Annually

3-Month USD LIBOR BBA

Quarterly

USD

3,080,000

$

61,692

$

147,531

$

(85,839)

 
Futures contracts  

	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Note 10 Year	6/19/20		158	$	20,819,474		$	1,093,151
Short
90 Day Eurodollar	6/15/20		2	$	(487,381	)	$	(9,994	)
U.S. Treasury Ultra 10 Year	6/19/20		71		(10,364,110	)		(714,109	)
U.S. Treasury Note 2 Year	6/30/20		185		(40,060,072	)		(710,748	)
U.S. Treasury Note 5 Year	6/30/20		478		(57,643,677	)		(2,278,104	)
90 Day Eurodollar	9/14/20		2		(487,593	)		(10,632	)
90 Day Eurodollar	12/14/20		2		(487,568	)		(10,732	)
90 Day Eurodollar	3/15/21		2		(487,743	)		(10,832	)
90 Day Eurodollar	9/13/21		3		(731,728	)		(15,985	)
90 Day Eurodollar	3/14/22		3		(731,503	)		(15,910	)
90 Day Eurodollar	9/19/22		3		(731,203	)		(15,647	)
90 Day Eurodollar	3/13/23		2		(487,168	)		(10,332	)
90 Day Eurodollar	12/18/23		3		(730,078	)		(15,385	)
90 Day Eurodollar	12/16/24		7		(1,701,414	)		(35,286	)
							$	(3,853,696	)

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 34†		1.000%	Quarterly	6/20/25	USD	900,000	$	3,126	$	3,914	$	(788	)
CDX.NA.IG Series 34†		1.000%	Quarterly	6/20/25	USD	800,000		5,325		2,841		2,484
							$	8,451	$	6,755	$	1,696

^† 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

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 96.8%
Common Stock — 96.8%
Basic Materials — 2.5%
Mining — 2.5%
Compass Minerals International, Inc. (a)		20,715	$	796,906
Kaiser Aluminum Corp.		17,805		1,233,531
				2,030,437
Communications — 1.6%
Internet — 1.2%
Q2 Holdings, Inc. (a) (b)		15,736		929,368
Media — 0.4%
Houghton Mifflin Harcourt Co. (b)		173,084		325,398
				1,254,766
Consumer, Cyclical — 10.8%
Auto Parts & Equipment — 2.5%
Dorman Products, Inc. (b)		16,786		927,762
Visteon Corp. (a) (b)		21,671		1,039,775
				1,967,537
Entertainment — 0.2%
Cedar Fair LP (c)		10,595		194,312
Retail — 8.1%
AutoNation, Inc. (b)		36,953		1,036,901
BJ's Wholesale Club Holdings, Inc. (a) (b)		55,440		1,412,057
Jack in the Box, Inc.		18,280		640,714
Suburban Propane Partners LP (c)		86,329		1,220,692
Texas Roadhouse, Inc.		27,979		1,155,533
The Wendy's Co.		68,180		1,014,518
				6,480,415
				8,642,264
Consumer, Non-cyclical — 26.3%
Biotechnology — 2.1%
Emergent BioSolutions, Inc. (b)		21,786		1,260,538
Twist Bioscience Corp. (a) (b)		12,413		379,589
				1,640,127
Commercial Services — 5.4%
ASGN, Inc. (b)		30,021		1,060,342
Korn Ferry		48,432		1,177,866
Monro, Inc. (a)		23,456		1,027,607
Paylocity Holding Corp. (b)		11,698		1,033,168
				4,298,983
Foods — 1.9%
BellRing Brands, Inc. Class A (b)		42,226		719,953
The Simply Good Foods Co. (b)		43,612		839,967
				1,559,920
Health Care – Products — 9.0%
Adaptive Biotechnologies Corp. (a) (b)		13,348		370,807
AtriCure, Inc. (b)		22,440		753,760
Inspire Medical Systems, Inc. (b)		16,982		1,023,675
Intersect ENT, Inc. (b)		26,510		314,143
Quidel Corp. (b)		17,707		1,731,922
Repligen Corp. (b)		15,622		1,508,148
Tandem Diabetes Care, Inc. (a) (b)		22,913		1,474,452
				7,176,907
Health Care – Services — 5.0%
Addus HomeCare Corp. (b)		14,948		1,010,485
LHC Group, Inc. (b)		16,887		2,367,557
Teladoc Health, Inc. (a) (b)		3,904		605,159
				3,983,201
Household Products & Wares — 1.2%
Acco Brands Corp.		197,948		999,637
Pharmaceuticals — 1.7%
Axsome Therapeutics, Inc. (b)		5,013		294,915
Collegium Pharmaceutical, Inc. (a) (b)		27,328		446,266
G1 Therapeutics, Inc. (a) (b)		12,676		139,690
uniQure NV (a) (b)		10,020		475,449
				1,356,320
				21,015,095
Energy — 1.6%
Energy – Alternate Sources — 1.4%
Renewable Energy Group, Inc. (a) (b)		51,987		1,067,293
Pipelines — 0.2%
Noble Midstream Partners LP (c)		52,719		184,517
				1,251,810
Financial — 20.2%
Banks — 4.5%
The Bank of NT Butterfield & Son Ltd.		39,469		672,157
BankUnited, Inc.		17,279		323,117
Cathay General Bancorp		24,446		561,036
CrossFirst Bankshares, Inc. (a) (b)		8,451		70,989
Heritage Financial Corp.		42,872		857,440
IBERIABANK Corp.		19,833		717,161
Signature Bank		4,579		368,106
				3,570,006

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

	Number of Shares		Value
Diversified Financial Services — 2.4%
Federated Hermes, Inc.		20,156	$	383,972
Focus Financial Partners, Inc. Class A (a) (b)		26,872		618,324
Stifel Financial Corp.		21,942		905,766
				1,908,062
Insurance — 1.9%
ProAssurance Corp.		44,902		1,122,550
ProSight Global, Inc. (a) (b)		41,995		409,451
				1,532,001
Real Estate Investment Trusts (REITS) — 6.4%
Brandywine Realty Trust		103,992		1,093,996
DiamondRock Hospitality Co.		175,415		891,108
EPR Properties		20,184		488,856
Four Corners Property Trust, Inc.		67,350		1,260,118
National Storage Affiliates Trust		31,348		927,901
SL Green Realty Corp. (a)		11,695		504,055
				5,166,034
Savings & Loans — 5.0%
Berkshire Hills Bancorp, Inc.		36,309		539,552
OceanFirst Financial Corp.		42,600		677,766
Pacific Premier Bancorp, Inc.		40,852		769,652
Sterling Bancorp		55,944		584,615
WSFS Financial Corp.		58,510		1,458,069
				4,029,654
				16,205,757
Industrial — 14.9%
Building Materials — 2.7%
Masonite International Corp. (b)		19,521		926,272
Summit Materials, Inc. Class A (b)		83,299		1,249,485
				2,175,757
Electrical Components & Equipment — 3.0%
Energizer Holdings, Inc.		25,433		769,348
EnerSys		12,621		624,992
Generac Holdings, Inc. (b)		10,693		996,267
				2,390,607
Electronics — 0.8%
Atkore International Group, Inc. (b)		30,789		648,724
Engineering & Construction — 3.1%
Comfort Systems USA, Inc.		10,864		397,079
KBR, Inc.		64,579		1,335,494
TopBuild Corp. (b)		10,074		721,701
				2,454,274
Environmental Controls — 1.2%
Evoqua Water Technologies Corp. (b)		50,214		562,899
US Ecology, Inc.		12,901		392,190
				955,089
Machinery – Diversified — 0.3%
Chart Industries, Inc. (b)		9,643		279,454
Metal Fabricate & Hardware — 1.9%
Mayville Engineering Co., Inc. (b)		34,830		213,508
Rexnord Corp.		56,931		1,290,626
				1,504,134
Miscellaneous - Manufacturing — 0.8%
EnPro Industries, Inc.		15,860		627,739
Transportation — 0.6%
CryoPort, Inc. (a) (b)		27,490		469,254
Trucking & Leasing — 0.5%
The Greenbrier Cos., Inc. (a)		24,004		425,831
				11,930,863
Technology — 14.9%
Computers — 3.4%
CACI International, Inc. Class A (b)		8,116		1,713,694
Perspecta, Inc.		55,160		1,006,118
				2,719,812
Semiconductors — 4.9%
Brooks Automation, Inc.		39,467		1,203,743
MKS Instruments, Inc.		19,399		1,580,049
Semtech Corp. (b)		30,681		1,150,537
				3,934,329
Software — 6.6%
Bottomline Technologies de, Inc. (b)		27,631		1,012,676
Envestnet, Inc. (b)		10,166		546,727
j2 Global, Inc. (a)		22,062		1,651,341
Zynga, Inc. Class A (b)		302,903		2,074,886
				5,285,630
				11,939,771
Utilities — 4.0%
Electric — 1.4%
Avista Corp.		26,029		1,105,972

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

	Number of Shares		Value
Gas — 2.6%
National Fuel Gas Co. (a)		17,717	$	660,667
South Jersey Industries, Inc. (a)		56,092		1,402,300
				2,062,967
				3,168,939
TOTAL COMMON STOCK  (Cost $86,986,653)				77,439,702
TOTAL EQUITIES (Cost $86,986,653)				77,439,702
Mutual Funds — 1.9%
Diversified Financial Services — 1.9%
State Street Navigator Securities Lending Prime Portfolio (d)		1,557,070		1,557,070
TOTAL MUTUAL FUNDS     (Cost $1,557,070)				1,557,070
TOTAL LONG-TERM INVESTMENTS (Cost $88,543,723)				78,996,772

		Principal Amount
Short-Term Investments — 3.0%
Repurchase Agreement — 3.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (e)	$	2,366,462		2,366,462
TOTAL SHORT-TERM INVESTMENTS   (Cost $2,366,462)				2,366,462
TOTAL INVESTMENTS — 101.7% (Cost $90,910,185) (f)				81,363,234
Other Assets/(Liabilities) — (1.7)%				(1,347,862	)
NET ASSETS — 100.0%			$	80,015,372

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $13,393,329 or 16.74% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $12,318,808 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(b)	Non-income producing security.
(c)	Security is a Master Limited Partnership.
(d)	Represents investment of security lending cash collateral. (Note 2).

(e) Maturity value of $2,366,462. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $2,413,887.

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

MML Special Situations Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 98.5%
Common Stock — 98.5%
Basic Materials — 7.0%
Chemicals — 7.0%
The Chemours Co.		43,100	$	382,297
Dow, Inc. (a)		21,000		614,040
DuPont de Nemours, Inc.		6,600		225,060
Ingevity Corp. (a)		6,639		233,693
Rayonier Advanced Materials, Inc.		4,600		4,876
				1,459,966
Communications — 11.1%
Media — 11.1%
Altice USA, Inc. Class A (a)		23,956		533,979
Cable One, Inc.		500		822,005
Liberty Broadband Corp. Class A (a)		3,500		374,500
Liberty Latin America Ltd. Class A (a)		54,100		569,132
				2,299,616
Consumer, Cyclical — 4.7%
Apparel — 1.7%
Kontoor Brands, Inc. (a) (b)		18,900		362,313
Distribution & Wholesale — 1.5%
IAA, Inc. (a)		10,300		308,588
Resideo Technologies, Inc. (a)		510		2,469
				311,057
Home Furnishing — 1.0%
Hamilton Beach Brands Holding Co. Class A		21,200		201,612
Leisure Time — 0.3%
Brunswick Corp.		1,500		53,055
Retail — 0.2%
J Alexander's Holdings, Inc. (a)		11,500		44,045
				972,082
Consumer, Non-cyclical — 27.6%
Biotechnology — 0.7%
Corteva, Inc. (a)		6,600		155,100
Commercial Services — 8.2%
PayPal Holdings, Inc. (a)		17,774		1,701,683
Foods — 1.7%
Lamb Weston Holdings, Inc.		6,300		359,730
Health Care – Products — 11.0%
Danaher Corp.		5,400		747,414
Varex Imaging Corp. (a)		7,500		170,325
West Pharmaceutical Services, Inc.		8,920		1,358,070
				2,275,809
Pharmaceuticals — 6.0%
Zoetis, Inc.		10,538		1,240,217
				5,732,539
Energy — 2.1%
Oil & Gas — 2.1%
Murphy USA, Inc. (a)		5,000		421,800
Financial — 4.1%
Banks — 0.6%
City Holding Co.		1,809		120,353
Diversified Financial Services — 0.7%
Synchrony Financial		9,540		153,498
Real Estate Investment Trusts (REITS) — 2.8%
Four Corners Property Trust, Inc.		10,300		192,713
Gaming and Leisure Properties, Inc.		13,900		385,169
				577,882
				851,733
Industrial — 32.8%
Electronics — 18.0%
Allegion PLC		8,500		782,170
Fortive Corp.		5,900		325,621
Honeywell International, Inc.		3,060		409,397
Keysight Technologies, Inc. (a)		25,949		2,171,412
nVent Electric PLC		2,340		39,476
				3,728,076
Engineering & Construction — 11.4%
Arcosa, Inc.		51,488		2,046,133
Jacobs Engineering Group, Inc.		4,100		325,007
				2,371,140
Machinery – Construction & Mining — 2.8%
Oshkosh Corp.		9,202		591,965
Machinery – Diversified — 0.6%
Welbilt, Inc. (a)		24,400		125,172
				6,816,353

MML Special Situations Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Technology — 9.1%
Computers — 9.1%
Hewlett Packard Enterprise Co.		147,300	$	1,430,283
Perspecta, Inc.		25,437		463,971
				1,894,254
TOTAL COMMON STOCK      (Cost $22,429,350)				20,448,343
TOTAL EQUITIES (Cost $22,429,350)				20,448,343
TOTAL LONG-TERM INVESTMENTS (Cost $22,429,350)				20,448,343
		Principal Amount
Short-Term Investments — 1.6%
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (c)	$	335,398		335,398
TOTAL SHORT-TERM INVESTMENTS   (Cost $335,398)				335,398
TOTAL INVESTMENTS — 100.1% (Cost $22,764,748) (d)				20,783,741
Other Assets/(Liabilities) — (0.1)%				(19,996	)
NET ASSETS — 100.0%			$	20,763,745

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $358,690 or 1.73% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $377,031 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 $335,398. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $342,616.
(d)	See Note 3 for aggregate cost for federal tax purposes.

MML Strategic Emerging Markets Fund —  Portfolio of Investments

March 31, 2020 (Unaudited)

	Number of Shares		Value
Equities — 96.4%
Common Stock — 93.4%
Bermuda — 2.6%
Credicorp Ltd.		12,952	$	1,853,042
Jardine Strategic Holdings Ltd.		46,889		1,037,885
				2,890,927
Brazil — 4.5%
Ambev SA		272,713		625,611
Ambev SA ADR		61,612		141,708
Atacadao SA		245,700		975,499
B3 SA - Brasil Bolsa Balcao		119,653		826,686
Itau Unibanco Holding SA Sponsored ADR		228,963		1,028,044
Vale SA Sponsored ADR		162,124		1,344,008
				4,941,556
Cayman Islands — 24.2%
Alibaba Group Holding Ltd. Sponsored ADR  (a)		29,924		5,819,620
Baozun, Inc. ADR  (a) (b)		19,296		539,130
Budweiser Brewing Co. APAC Ltd. (a) (c)		735,500		1,889,807
Huazhu Group Ltd. ADR (b)		107,237		3,080,919
Hutchison China MediTech Ltd. ADR (a)		10,405		185,729
Innovent Biologics, Inc. (a) (c)		147,000		618,006
Meituan Dianping, Class B (a)		118,500		1,422,062
OneConnect Financial Technology Co. Ltd. (a)		49,687		504,323
Pagseguro Digital Ltd. Class A (a) (b)		53,249		1,029,303
StoneCo Ltd. Class A (a) (b)		16,313		355,134
Tencent Holdings Ltd.		155,909		7,602,368
Wuxi Biologics Cayman, Inc. (a) (c)		44,500		573,675
ZTO Express Cayman, Inc. ADR (a)		113,862		3,015,066
				26,635,142
Chile — 0.6%
SACI Falabella		324,841		715,796
China — 5.1%
China International Capital Corp. Ltd. Class H (c)		305,200		491,324
Jiangsu Hengrui Medicine Co. Ltd. Class A		258,960		3,370,054
Ping An Insurance Group Co. of China Ltd. Class A		168,762		1,651,732
Shanghai Junshi Bioscience Class H (a) (c)		25,800		96,011
				5,609,121
Colombia — 0.4%
Grupo Aval Acciones y Valores SA		91,386		400,271
Egypt — 0.5%
Commercial International Bank Egypt SAE		156,047		579,971
France — 6.3%
Kering SA		13,296		6,937,781
LVMH Moet Hennessy Louis Vuitton SE		109		40,461
				6,978,242
Hong Kong — 4.9%
AIA Group Ltd.		565,000		5,082,910
Hansoh Pharmaceutical Group Co. Ltd. (a) (c)		96,000		324,282
				5,407,192
India — 9.4%
Housing Development Finance Corp. Ltd.		195,271		4,149,825
Kotak Mahindra Bank Ltd.		187,438		3,149,818
Oberoi Realty Ltd.		75,766		335,982
Tata Consultancy Services Ltd.		92,434		2,206,467
Zee Entertainment Enterprises Ltd.		315,798		515,020
				10,357,112
Indonesia — 1.0%
Bank Central Asia Tbk PT		379,100		641,034
Indocement Tunggal Prakarsa Tbk PT		337,997		258,225
Semen Indonesia Persero Tbk PT		331,200		154,457
				1,053,716
Italy — 2.0%
Brunello Cucinelli SpA		133		4,046
Moncler SpA		28,090		1,025,428
PRADA SpA		411,000		1,199,778
				2,229,252
Mexico — 6.3%
Alsea SAB de CV (a)		243,074		154,211
America Movil SAB de CV Sponsored ADR		62,675		738,312
Fomento Economico Mexicano SAB de CV		424,642		2,581,773
Fomento Economico Mexicano SAB de CV Sponsored ADR		10,777		652,116
Grupo Aeroportuario del Sureste SAB de CV Class B		41,904		394,990
Grupo Financiero Banorte SAB de CV Class O		163,349		447,579
Grupo Financiero Inbursa SAB de CV Class O		685,724		491,403
Grupo Mexico SAB de CV Series B		805,630		1,493,926
				6,954,310
Netherlands — 1.5%
Yandex NV Class A (a)		48,895		1,664,875
Philippines — 2.4%
Ayala Land, Inc.		1,435,500		857,348
SM Investments Corp.		93,115		1,504,174
SM Prime Holdings, Inc.		423,012		237,166
				2,598,688
Republic of Korea — 2.2%
Amorepacific Corp.		3,959		545,753
AMOREPACIFIC Group		5,072		228,664
Samsung Biologics Co. Ltd. (a) (c)		4,093		1,603,980
				2,378,397

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

	Number of Shares		Value
Russia — 6.9%
LUKOIL PJSC Sponsored ADR		7,989	$	476,137
LUKOIL PJSC Sponsored ADR		544		32,183
MMC Norilsk Nickel PJSC		1,055		261,328
MMC Norilsk Nickel PJSC ADR (b)		964		23,387
MMC Norilsk Nickel PJSC ADR (Russia)		13,799		341,709
Novatek PJSC Sponsored GDR Registered (b) (c)		31,597		3,623,468
Novatek PJSC Sponsored GDR Registered (c)		3,074		354,432
Polyus PJSC GDR (c) (d)		4,342		296,124
Sberbank of Russia PJSC		904,451		2,144,830
				7,553,598
South Africa — 1.5%
FirstRand Ltd. (b)		745,779		1,675,529
Taiwan — 6.0%
Taiwan Semiconductor Manufacturing Co. Ltd.		745,000		6,649,880
Turkey — 1.6%
Akbank T.A.S. (a)		763,895		635,212
Anadolu Efes Biracilik Ve Malt Sanayii AS		132,968		345,858
BIM Birlesik Magazalar AS		45,429		341,802
Turkiye Garanti Bankasi AS (a)		327,803		394,504
				1,717,376
United Kingdom — 0.1%
Glencore PLC		72,419		110,530
United States — 3.4%
MercadoLibre, Inc. (a)		201		98,205
Yum China Holdings, Inc.		86,851		3,702,458
				3,800,663
TOTAL COMMON STOCK (Cost $109,829,052)				102,902,144
Preferred Stock — 3.0%
Brazil — 1.1%
Lojas Americanas SA 0.640%
		348,903		1,208,648
India — 0.0%
Zee Entertainment Enterprises Ltd.
6.000%		503,840		19,647
Singapore — 1.9%
Grab Holdings, Inc., (Acquired 6/18/19, Cost $2,160,355) (a) (d) (e) (f)		350,542		2,160,355
TOTAL PREFERRED STOCK                           (Cost $3,873,009)				3,388,650
TOTAL EQUITIES (Cost $113,702,061)				106,290,794
Mutual Funds — 0.5%
United States — 0.5%
State Street Navigator Securities Lending Prime Portfolio (g)		544,436		544,436
TOTAL MUTUAL FUNDS (Cost $544,436)				544,436
TOTAL LONG-TERM INVESTMENTS (Cost $114,246,497)				106,835,230

		Principal Amount
Short-Term Investments — 3.6%
Repurchase Agreement — 3.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 3/31/20, 0.000%, due 4/01/20 (h)	$	3,956,495		3,956,495
TOTAL SHORT-TERM INVESTMENTS (Cost $3,956,495)				3,956,495
TOTAL INVESTMENTS — 100.5% (Cost $118,202,992) (i)				110,791,725
Other Assets/(Liabilities) — (0.5)%				(590,389	)
NET ASSETS — 100.0%			$	110,201,336

Abbreviation Legend
ADR	American Depositary Receipt
GDR	Global  Depositary Receipt
PJSC	Public Joint Stock Company

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2020, was $2,930,342 or 2.66% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,352,296 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)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At March 31, 2020, the aggregate market value of these securities amounted to $9,871,109 or 8.96% of net assets.
(d)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2020, these securities amounted to a value of $2,456,479 or 2.23% of net assets.
(e)	Investment was valued using significant unobservable inputs.
(f)	Restricted security. Certain securities are restricted as to resale. At March 31, 2020, these securities amounted to a value of $2,160,355 or 1.96% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.
(g)	Represents investment of security lending cash collateral. (Note 2).
(h)	Maturity value of $3,956,495. Collateralized by U.S. Government Agency obligations with a rate of 1.750%, maturity date of 7/15/22, and an aggregate market value, including accrued interest, of $4,038,719.
(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 (the “1940 Act”), 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 the following series (each individually referred to as a “Fund” or collectively as the “Funds”):

MML Asset Momentum Fund ("Asset Momentum Fund")

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 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 Special Situations Fund ("Special Situations 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 Allocation Funds, 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.

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 and will instead fair value securities in accordance with procedures approved annually by the Board of Trustees ("Trustees"), and under the general oversight of the Trustees. 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. Restricted securities are generally valued at a discount to similar publicly traded securities.

Investments for which market quotations are not available or for which a pricing service or vendor does not provide a value, or for which such market quotations or values are considered by the investment adviser or 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) are stated at fair valuations determined in good faith by the Funds' Valuation Committee¹ in accordance with procedures approved annually by the Trustees, and under the general oversight of the Trustees. The Funds' Valuation Committee employs various methods to determine fair valuations including a regular review of significant inputs and assumptions and review of any related market activity. The Funds' Valuation Committee reports to the Trustees at its regularly scheduled meetings. It is possible that fair value prices will be used by the Funds to a significant extent. The value determined for an investment using the Funds' fair value procedures 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.

¹ The voting members of the Valuation Committee consist of the President, Treasurer, Assistant Treasurers, Vice Presidents (except for the CCO, Secretary, and Assistant Secretaries) of the Trust, as well as such other members as the Trustees may from time to time designate. The non-voting members of the Valuation Committee consist of the CCO, Secretary, and Assistant Secretaries. The Valuation Committee reviews and determines the fair valuation of portfolio securities and the Funds’ pricing procedures in general.

Notes to Portfolio of Investments (Unaudited) (Continued)

For 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, as described below, the fair valuation approaches used by third party service providers and/or the Funds’ subadvisers utilize 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 indices 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 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.

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

Level 2 – other significant observable inputs (including 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 Equity Rotation Fund, Small Cap Equity Fund, and Special Situations Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of March 31, 2020. For each Fund noted in the preceding sentence, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

Notes to Portfolio of Investments (Unaudited) (Continued)

The following is the aggregate value by input level, as of March 31, 2020, for the remaining Funds' investments:

Asset Momentum Fund 

Asset Investments		Level 1			Level 2			Level 3		Total
Common Stock	$	4,296,786		$	2,115,614	*	$	—	$	6,412,400
U.S. Treasury Obligations		—			6,066,359			—		6,066,359
Mutual Funds		15,269,311			—			—		15,269,311
Short-Term Investments		—			4,027,681			—		4,027,681
Total Investments	$	19,566,097		$	12,209,654		$	—	$	31,775,751
Liability Derivatives
Futures Contracts	$	(706,644	)	$	—		$	—	$	(706,644	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Blend Fund

Asset Investments		Level 1			Level 2		Level 3		Total
Common Stock	$	378,933,428		$	—	$	—	$	378,933,428
Preferred Stock		487,200			—		—		487,200
Corporate Debt		—			80,338,588		—		80,338,588
Municipal Obligations		—			1,672,578		—		1,672,578
Non-U.S. Government Agency Obligations		—			74,572,514		—		74,572,514
Sovereign Debt Obligations		—			1,752,381		—		1,752,381
U.S. Government Agency Obligations and Instrumentalities		—			66,718,666		—		66,718,666
U.S. Treasury Obligations		—			8,367,021		—		8,367,021
Purchased Options		—			369,054		—		369,054
Rights		97,189			—		—		97,189
Mutual Funds		610,776			—		—		610,776
Short-Term Investments		—			42,934,072		—		42,934,072
Total Investments	$	380,128,593		$	276,724,874	$	—	$	656,853,467
Asset Derivatives
Futures Contracts	$	2,949,394		$	—	$	—	$	2,949,394
Swap Agreements		—			10,476		—		10,476
Total	$	2,949,394		$	10,476	$	—	$	2,959,870
Liability Derivatives
Futures Contracts	$	(543,422	)	$	—	$	—	$	(543,422	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Dynamic Bond Fund

Asset Investments		Level 1		Level 2		Level 3		Total
Bank Loans	$	—	$	9,544,545	$	—	$	9,544,545
Corporate Debt		—		77,729,837		—		77,729,837
Municipal Obligations		—		461,385		—		461,385
Non-U.S. Government Agency Obligations		—		69,844,533		—		69,844,533
Sovereign Debt Obligations		—		1,079,727		—		1,079,727
U.S. Government Agency Obligations and Instrumentalities		—		58,033,291		—		58,033,291
U.S. Treasury Obligations		—		90,565,877		—		90,565,877
Mutual Funds		154,275		—		—		154,275
Short-Term Investments		—		9,651,056		—		9,651,056
Total Investments	$	154,275	$	316,910,251	$	—	$	317,064,526

Notes to Portfolio of Investments (Unaudited) (Continued)

Equity Fund

Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock	$	580,410,017	$	—	$	—	$	580,410,017
Preferred Stock		3,216,643		—		—		3,216,643
Corporate Debt		—		82,561		—		82,561
Mutual Funds		5,744,580		—		—		5,744,580
Short-Term Investments		—		3,582,538		—		3,582,538
Total Investments	$	589,371,240	$	3,665,099	$	—	$	593,036,339

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments		Level 1		Level 2		Level 3			Total
Common Stock	$	191,606	$	356,962	$	—	+**	$	548,568
Preferred Stock		—		—		—			—
Bank Loans		—		5,739,991		—			5,739,991
Corporate Debt		—		101,899,830		231,906	**		102,131,736
Warrants		—		—		263	**		263
Mutual Funds		4,597,363		—		—			4,597,363
Total Investments	$	4,788,969	$	107,996,783	$	232,169		$	113,017,921

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments		Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	3,489,914		$	—	$	3,489,914
Municipal Obligations		—			41,972			—		41,972
Non-U.S. Government Agency Obligations		—			183,610,485			—		183,610,485
U.S. Government Agency Obligations and Instrumentalities		—			1,533,927			—		1,533,927
U.S. Treasury Obligations		—			65,752,513			—		65,752,513
Purchased Options		—			1,072,161			—		1,072,161
Short-Term Investments		—			69,496,692			—		69,496,692
Total Investments	$	—		$	324,997,664		$	—	$	324,997,664
Asset Derivatives
Futures Contracts	$	205,180		$	—		$	—	$	205,180
Swap Agreements		—			1,360,398			—		1,360,398
Total	$	205,180		$	1,360,398		$	—	$	1,565,578
Liability Derivatives
Futures Contracts		(244,452	)		—			—		(244,452	)
Swap Agreements		—			(395,315	)		—		(395,315	)
Total	$	(244,452	)	$	(395,315	)	$	—	$	(639,767	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Managed Bond Fund

Asset Investments		Level 1			Level 2		Level 3		Total
Preferred Stock	$	2,314,200		$	—	$	—	$	2,314,200
Corporate Debt		—			345,843,941		—		345,843,941
Municipal Obligations		—			5,967,805		—		5,967,805
Non-U.S. Government Agency Obligations		—			323,859,919		—		323,859,919
Sovereign Debt Obligations		—			7,042,755		—		7,042,755
U.S. Government Agency Obligations and Instrumentalities		—			247,197,146		—		247,197,146
U.S. Treasury Obligations		—			15,009,595		—		15,009,595
Purchased Options		—			1,829,518		—		1,829,518
Mutual Funds		2,288,213			—		—		2,288,213
Short-Term Investments		—			130,676,274		—		130,676,274
Total Investments	$	4,602,413		$	1,077,426,953	$	—	$	1,082,029,366
Asset Derivatives
Futures Contracts	$	11,855,755		$	—	$	—	$	11,855,755
Swap Agreements		—			43,989		—		43,989
Total	$	11,855,755		$	43,989	$	—	$	11,899,744
Liability Derivatives
Futures Contracts	$	(2,056,283	)	$	—	$	—	$	(2,056,283	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Short-Duration Bond Fund

Asset Investments		Level 1			Level 2		Level 3		Total
Corporate Debt	$	—		$	71,279,873	$	—	$	71,279,873
Municipal Obligations		—			462,164		—		462,164
Non-U.S. Government Agency Obligations		—			99,107,727		—		99,107,727
U.S. Government Agency Obligations and Instrumentalities		—			2,290,954		—		2,290,954
U.S. Treasury Obligations		—			1,373,800		—		1,373,800
Purchased Options		—			61,692		—		61,692
Short-Term Investments		—			1,999,571		—		1,999,571
Total Investments	$	—		$	176,575,781	$	—	$	176,575,781
Asset Derivatives
Futures Contracts	$	1,093,151		$	—	$	—	$	1,093,151
Swap Agreements		—			8,451		—		8,451
Total	$	1,093,151		$	8,451	$	—	$	1,101,602
Liability Derivatives
Futures Contracts	$	(3,853,696	)	$	—	$	—	$	(3,853,696	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments		Level 1		Level 2		Level 3		Total
Common Stock*
Bermuda	$	1,853,042	$	1,037,885	$	—	$	2,890,927
Brazil		4,941,556		—		—		4,941,556
Cayman Islands		14,529,224		12,105,918		—		26,635,142
Chile		715,796		—		—		715,796
China		—		5,609,121		—		5,609,121
Colombia		400,271		—		—		400,271
Egypt		—		579,971		—		579,971
France		—		6,978,242		—		6,978,242
Hong Kong		—		5,407,192		—		5,407,192
India		—		10,357,112		—		10,357,112
Indonesia		—		1,053,716		—		1,053,716
Italy		—		2,229,252		—		2,229,252
Mexico		6,954,310		—		—		6,954,310
Netherlands		1,664,875		—		—		1,664,875
Philippines		—		2,598,688		—		2,598,688
Republic of Korea		—		2,378,397		—		2,378,397
Russia		354,432		7,199,166		—		7,553,598
South Africa		—		1,675,529		—		1,675,529
Taiwan		—		6,649,880		—		6,649,880
Turkey		—		1,717,376		—		1,717,376
United Kingdom		—		110,530		—		110,530
United States		3,800,663		—		—		3,800,663
Preferred Stock
Brazil		1,208,648		—		—		1,208,648
India		19,647		—		—		19,647
Singapore		—		—		2,160,355		2,160,355
Mutual Funds		544,436		—		—		544,436
Short-Term Investments		—		3,956,495		—		3,956,495
Total Investments	$	36,986,900	$	71,644,470	$	2,160,355	$	110,791,725

* 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.

** None of the unobservable inputs for Level 3 assets, individually or collectively, had a material impact on the Fund(s). Level 3 investments at March 31, 2020 in relation to net assets were not significant and accordingly, a reconciliation of Level 3 assets for March 31, 2020 is not presented.

+ Represents a security at $0 value as of March 31, 2020.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

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

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

Securities Lending

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

Each Fund expects that in connection with any securities on loan, the loan will be secured continuously by collateral consisting of cash (U.S. currency) and/or securities (U.S. Treasury and Agency obligations) adjusted daily to have value at least equal to the current market value of the securities loaned. The market value of the loaned securities is determined at the close of business of a Fund and any additional collateral is delivered to the Fund the next business day. The Funds bear the risk of loss with respect to the investment of cash collateral. As with other extensions of credit, the Funds may bear the risk of delay in recovery of the loaned securities or even loss of rights in the collateral should the Borrower of the securities fail financially. Pursuant to the Lending Agreement, the Agent has provided indemnification to the Funds in the event of default by a Borrower with respect to a loan. The Funds receive compensation for lending their securities in the form of a securities loan fee paid by the Borrower, as well as a share of the income earned on investment of the cash collateral received for the loaned securities. At March 31, 2020, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan.

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. The Funds determine the classification of distributions received as return of capital distributions or capital gain distributions.

Notes to Portfolio of Investments (Unaudited) (Continued)

Foreign Currency Translation

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

Foreign Securities

The Strategic Emerging Markets Fund invests substantially all of its assets in foreign securities. The other Funds may also 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, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely 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, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

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 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 federal income tax.

Dividends and Distributions to Shareholders

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

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

3. Federal Income Tax Information

At March 31, 2020, 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:

Notes to Portfolio of Investments (Unaudited) (Continued)

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Asset Momentum Fund	$	31,580,228	$	2,002,798	$	(1,807,275	)	$	195,523
Blend Fund		610,312,494		95,676,552		(49,135,579	)		46,540,973
Dynamic Bond Fund		325,887,428		14,068,767		(22,891,669	)		(8,822,902	)
Equity Fund		670,866,488		32,934,381		(110,764,530	)		(77,830,149	)
Equity Rotation Fund		28,423,656		1,734,689		(3,648,223	)		(1,913,534	)
High Yield Fund		131,328,766		1,388,658		(19,699,503	)		(18,310,845	)
Inflation-Protected and Income Fund		332,646,718		4,710,488		(12,359,542	)		(7,649,054	)
Managed Bond Fund		1,126,179,720		21,796,722		(65,947,076	)		(44,150,354	)
Short-Duration Bond Fund		186,412,326		1,252,411		(11,088,956	)		(9,836,545	)
Small Cap Equity Fund		90,910,185		13,433,190		(22,980,141	)		(9,546,951	)
Special Situations Fund		22,764,748		3,850,968		(5,831,975	)		(1,981,007	)
Strategic Emerging Markets Fund		118,202,992		10,688,976		(18,100,243	)		(7,411,267	)

Notes to Portfolio of Investments (Unaudited) (Continued)

4. New Accounting Pronouncements

In August 2018, FASB issued Accounting Standards Update 2018-13 — Fair Value Measurement (Topic 820) Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 eliminates the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the timing of transfers between levels of the fair value hierarchy, and the valuation processes for Level 3 fair value measurements. ASU 2018-13 requires that information is provided about the measurement uncertainty of Level 3 fair value measurements as of the reporting date. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Management has evaluated the impact of ASU 2018-13 and has early adopted the disclosure requirements and the impact, if any, is reflected within the Funds’ financial statements.

5. Legal Proceedings

On December 7, 2010, the Trust was named as a defendant and putative member of the proposed defendant class of shareholders named in an adversary proceeding brought by The Official Committee of Unsecured Creditors of Tribune Company (the “Official Committee”) in the U.S. Bankruptcy Court for the District of Delaware, in connection with Tribune Company’s Chapter 11 bankruptcy proceeding (In re Tribune Company). The proceeding relates to a leveraged buyout (“LBO”) transaction by which Tribune Company converted to a privately-held company in 2007, and the putative defendant class is comprised of beneficial owners of shares of Tribune Company who received proceeds (the “Proceeds”) of the LBO. The Official Committee seeks to recover payments of those Proceeds. On April 5, 2012, the adversary proceeding was transferred to the Southern District of New York for consolidated pretrial proceedings. The action is now being prosecuted by the litigation trustee (“Trustee”) for the Tribune Litigation Trust.

The potential amount sought to be recovered from the Blend Fund and Small Cap Equity Fund are approximately $207,400 and $93,500, respectively, plus interest and the Official Committee’s court costs.

In addition, on June 2, 2011, the Blend Fund was named as a defendant in a closely related, parallel adversary proceeding brought in connection with the Tribune Company’s LBO by Deutsche Bank Trust Company Americas, in its capacity as successor indenture trustee for a certain series of Senior Notes, Law Debenture Trust Company of New York, in its capacity as successor indenture trustee for a certain series of Senior Notes, and Wilmington Trust Company, in its capacity as successor indenture trustee for the PHONES Notes (together, the “Plaintiffs”), in the United States District Court for the District of Massachusetts. The Plaintiffs also seek to recover payments of the Proceeds. On December 20, 2011, this action was transferred to the Southern District of New York for consolidated pretrial proceedings.

The Funds cannot predict the outcome of these proceedings. Accordingly, the Funds have not accrued any amounts related to these proceedings. If the proceedings were to be decided in a manner adverse to the Funds, or if the Funds were to enter into a settlement agreement with the Trustee or the Plaintiffs, as applicable, the payment of such judgment or settlement could potentially have a material adverse effect on the Funds' net asset value depending on the net assets of each applicable Fund at the time of such judgment or settlement.

6. Coronavirus (COVID-19) Pandemic

The global pandemic outbreak of the novel coronavirus known as COVID-19 has produced, and will likely continue to produce, substantial market volatility, severe market dislocations and liquidity constraints in many markets, and global business disruption, and it may result in future significant adverse effects, such as exchange trading suspensions and closures, declines in global financial markets, higher default rates, and a substantial economic downturn or recession throughout the world.  Such factors 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.