UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number	811-02224
MML Series Investment Fund
(Exact name of registrant as specified in charter)
100 Bright Meadow Blvd., Enfield, CT                                06082
(Address of principal executive offices)                                                                  (Zip code)
Brian Haendiges
100 Bright Meadow Blvd., Enfield, CT                                06082
(Name and address of agent for service)

  Registrant’s telephone number, including area code:     (860) 562-1000

  Date of fiscal year end:     12/31/2017

  Date of reporting period:     3/31/2017

Item 1. Schedule of Investments.

MML Aggressive Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 89.9%
MML Blue Chip Growth Fund, Initial Class (a)		565,061	$	8,713,246
MML Equity Income Fund, Initial Class (a)		570,757		6,951,816
MML Equity Index Fund, Class III (a)		191,248		5,375,975
MML Focused Equity Fund, Class II (a)		318,738		4,503,768
MML Foreign Fund, Initial Class (a)		719,143		7,270,539
MML Fundamental Growth Fund, Class II (a)		512,704		6,378,042
MML Fundamental Value Fund, Class II (a)		543,779		8,314,381
MML Global Fund, Class I (a)		685,671		8,543,456
MML Income & Growth Fund, Initial Class (a)		587,212		7,187,470
MML International Equity Fund, Class II (a)		659,507		6,759,948
MML Large Cap Growth Fund, Initial Class (a)		284,599		3,292,812
MML Mid Cap Growth Fund, Initial Class (a)		529,933		8,229,855
MML Mid Cap Value Fund, Initial Class (a)		658,508		8,027,218
MML Small Cap Growth Equity Fund, Initial Class (a)		161,930		2,179,204
MML Small Company Value Fund, Class II (a)		214,746		3,700,067
MML Small/Mid Cap Value Fund, Initial Class (a)		210,108		2,830,149
MML Strategic Emerging Markets Fund, Class II (a)		538,599		5,159,777
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares (a)		36,059		2,843,619
Oppenheimer Global Fund/VA, Non-Service Shares (a)		155,166		5,997,167
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares (a)		1,282,689		12,724,279
Oppenheimer International Growth Fund/VA, Non-Service Shares (a)		1,613,317		3,597,696
				128,580,484
Fixed Income Funds — 10.2%
MML Dynamic Bond Fund, Class II (a)		210,110		2,107,403
MML Inflation-Protected and Income Fund, Initial Class (a)		371,278		3,827,877

	Number of Shares		Value
MML Managed Bond Fund, Initial Class (a)		279,942	$	3,467,698
MML Short-Duration Bond Fund, Class II (a)		314,857		3,091,896
MML Total Return Bond Fund, Class II (a)		198,663		2,056,166
				14,551,040
TOTAL MUTUAL FUNDS (Cost $141,106,184)				143,131,524
TOTAL LONG-TERM INVESTMENTS (Cost $141,106,184)				143,131,524
TOTAL INVESTMENTS — 100.1% (Cost $141,106,184) (b)				143,131,524
Other Assets/(Liabilities) — (0.1)%				(87,840	)
NET ASSETS — 100.0%			$	143,043,684

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer. See Note 4 for a summary of transactions in the investments of affiliated issuers.

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

The accompanying notes are an integral part of the portfolio of investments.

1

MML American Funds Core Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 64.6%
American Funds Blue Chip Income and Growth Fund, Class 1		16,586,001	$	234,028,477
American Funds Growth-Income Fund, Class 1		6,028,221		285,617,132
American Funds International Fund, Class 1		7,076,750		130,778,342
				650,423,951
Fixed Income Funds — 35.5%
American Funds Bond Fund, Class 1		32,691,869		356,995,205
TOTAL MUTUAL FUNDS (Cost $950,112,398)				1,007,419,156
TOTAL LONG-TERM INVESTMENTS (Cost $950,112,398)				1,007,419,156
TOTAL INVESTMENTS — 100.1% (Cost $950,112,398) (a)				1,007,419,156
Other Assets/(Liabilities) — (0.1)%				(1,078,861	)
NET ASSETS — 100.0%			$	1,006,340,295

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

The accompanying notes are an integral part of the portfolio of investments.

2

MML American Funds Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 100.1%
American Funds Growth Fund, Class 1		2,048,761	$	150,604,400
				150,604,400
TOTAL MUTUAL FUNDS (Cost $134,596,930)				150,604,400
TOTAL LONG-TERM INVESTMENTS (Cost $134,596,930)				150,604,400
TOTAL INVESTMENTS —100.1% (Cost $134,596,930) (a)				150,604,400
Other Assets/(Liabilities) — (0.1)%				(163,404	)
NET ASSETS — 100.0%			$	150,440,996

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

The accompanying notes are an integral part of the portfolio of investments.

3

MML American Funds International Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 100.1%
American Funds International Fund, Class 1		3,175,620	$	58,685,454
				58,685,454
TOTAL MUTUAL FUNDS (Cost $57,277,334)				58,685,454
TOTAL LONG-TERM INVESTMENTS (Cost $57,277,334)				58,685,454
TOTAL INVESTMENTS — 100.1% (Cost $57,277,334) (a)				58,685,454
Other Assets/(Liabilities) — (0.1)%				(70,426	)
NET ASSETS — 100.0%			$	58,615,028

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

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

The accompanying notes are an integral part of the portfolio of investments.

4

MML Balanced Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 49.8%
MML Blue Chip Growth Fund, Initial Class (a)		1,347,850	$	20,783,842
MML Equity Income Fund, Initial Class (a)		1,473,579		17,948,194
MML Equity Index Fund, Class III (a)		574,719		16,155,362
MML Focused Equity Fund, Class II (a)		662,893		9,366,673
MML Foreign Fund, Initial Class (a)		1,671,517		16,899,035
MML Fundamental Growth Fund, Class II (a)		1,277,651		15,893,984
MML Fundamental Value Fund, Class II (a)		1,174,789		17,962,519
MML Global Fund, Class I (a)		1,531,824		19,086,521
MML Income & Growth Fund, Initial Class (a)		1,536,257		18,803,789
MML International Equity Fund, Class II (a)		1,365,989		14,001,386
MML Large Cap Growth Fund, Initial Class (a)		554,859		6,419,721
MML Mid Cap Growth Fund, Initial Class (a)		941,739		14,625,206
MML Mid Cap Value Fund, Initial Class (a)		1,354,850		16,515,625
MML Small Cap Growth Equity Fund, Initial Class (a)		314,383		4,230,868
MML Small Company Value Fund, Class II (a)		404,351		6,966,974
MML Small/Mid Cap Value Fund, Initial Class (a)		348,993		4,700,936
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares (a)		63,523		5,009,396
Oppenheimer Global Fund/VA, Non-Service Shares (a)		331,758		12,822,430
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares (a)		4,124,094		40,911,017
Oppenheimer International Growth Fund/VA, Non-Service Shares (a)		5,889,683		13,133,992
				292,237,470
Fixed Income Funds — 50.3%
MML Dynamic Bond Fund, Class II (a)		6,435,724		64,550,312
MML High Yield Fund, Class II (a)		1,523,298		15,659,501
MML Inflation-Protected and Income Fund, Initial Class (a)		2,104,288		21,695,214
MML Managed Bond Fund, Initial Class (a)		8,321,322		103,077,984

	Number of Shares		Value
MML Short-Duration Bond Fund, Class II (a)		2,917,334	$	28,648,223
MML Total Return Bond Fund, Class II (a)		5,966,774		61,756,114
				295,387,348
TOTAL MUTUAL FUNDS (Cost $587,100,165)				587,624,818
TOTAL LONG-TERM INVESTMENTS (Cost $587,100,165)				587,624,818
TOTAL INVESTMENTS — 100.1% (Cost $587,100,165) (b)				587,624,818
Other Assets/(Liabilities) — (0.1)%				(404,497	)
NET ASSETS — 100.0%			$	587,220,321

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer. See Note 4 for a summary of transactions in the investments of affiliated issuers.

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

The accompanying notes are an integral part of the portfolio of investments.

5

MML Blue Chip Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.7%
COMMON STOCK — 99.7%
Basic Materials — 0.1%
Chemicals — 0.1%
E.I. du Pont de Nemours & Co.		600	$	48,198
PPG Industries, Inc.		300		31,524
The Sherwin-Williams Co.		1,300		403,247
				482,969
Communications — 31.9%
Internet — 31.1%
Alibaba Group Holding Ltd. Sponsored ADR (Cayman Islands) (a)		75,446		8,135,342
Alphabet, Inc. Class A (a)		10,200		8,647,560
Alphabet, Inc. Class C (a)		18,956		15,725,139
Amazon.com, Inc. (a)		35,549		31,515,611
Baidu, Inc. Sponsored ADR (Cayman Islands) (a)		296		51,066
Ctrip.com International Ltd. ADR (Cayman Islands) (a)		41,640		2,046,606
Facebook, Inc. Class A (a)		136,376		19,372,211
MercadoLibre, Inc.		700		148,029
Netflix, Inc. (a)		29,800		4,404,738
The Priceline Group, Inc. (a)		9,725		17,310,208
Snap, Inc. Class A (a)		16,500		371,745
Tencent Holdings Ltd.		213,800		6,137,112
				113,865,367
Media — 0.8%
Charter Communications, Inc. Class A (a)		5,132		1,679,806
Comcast Corp. Class A		31,400		1,180,326
The Walt Disney Co.		2,100		238,119
				3,098,251
				116,963,618
Consumer, Cyclical — 12.6%
Airlines — 2.9%
Alaska Air Group, Inc.		39,100		3,605,802
American Airlines Group, Inc.		126,200		5,338,260
Delta Air Lines, Inc.		700		32,172
United Continental Holdings, Inc. (a)		24,900		1,758,936
				10,735,170
Auto Manufacturers — 1.1%
Ferrari NV		10,700		795,652
Tesla, Inc. (a)		11,602		3,228,836
				4,024,488
Auto Parts & Equipment — 0.4%
Delphi Automotive PLC		18,300		1,472,967

	Number of Shares		Value
Leisure Time — 0.5%
Norwegian Cruise Line Holdings Ltd. (a)		3,100	$	157,263
Royal Caribbean Cruises Ltd.		17,900		1,756,169
				1,913,432
Lodging — 1.7%
Hilton Worldwide Holdings, Inc.		28,076		1,641,323
Las Vegas Sands Corp.		8,100		462,267
Marriott International, Inc. Class A		26,587		2,503,964
MGM Resorts International		61,300		1,679,620
				6,287,174
Retail — 6.0%
AutoZone, Inc. (a)		1,900		1,373,795
Coach, Inc.		15,200		628,216
Costco Wholesale Corp.		3,700		620,453
Dollar General Corp.		2,600		181,298
Domino’s Pizza, Inc.		727		133,986
The Home Depot, Inc.		30,300		4,448,949
Lowe’s Cos., Inc.		37,400		3,074,654
O’Reilly Automotive, Inc. (a)		10,444		2,818,209
Ross Stores, Inc.		36,900		2,430,603
Starbucks Corp.		18,500		1,080,215
Walgreens Boots Alliance, Inc.		41,900		3,479,795
Yum! Brands, Inc.		26,100		1,667,790
				21,937,963
				46,371,194
Consumer, Non-cyclical — 20.3%
Agriculture — 0.9%
Philip Morris International, Inc.		30,200		3,409,580
Beverages — 0.3%
Constellation Brands, Inc. Class A		3,200		518,624
Dr. Pepper Snapple Group, Inc.		400		39,168
Molson Coors Brewing Co. Class B		1,100		105,281
Monster Beverage Corp. (a)		6,400		295,488
				958,561
Biotechnology — 4.1%
Alexion Pharmaceuticals, Inc. (a)		27,695		3,357,742
Biogen, Inc. (a)		11,400		3,116,988
Celgene Corp. (a)		38,100		4,740,783
Illumina, Inc. (a)		3,400		580,176
Regeneron Pharmaceuticals, Inc. (a)		200		77,502
Vertex Pharmaceuticals, Inc. (a)		27,200		2,974,320
				14,847,511
Commercial Services — 1.6%
Ecolab, Inc.		1,800		225,612
Equifax, Inc.		5,400		738,396
FleetCor Technologies, Inc. (a)		4,300		651,149
Global Payments, Inc.		7,300		588,964
IHS Markit Ltd. (a)		16,148		677,409

The accompanying notes are an integral part of the portfolio of investments.

6

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

	Number of Shares		Value
PayPal Holdings, Inc. (a)		56,900	$	2,447,838
S&P Global, Inc.		4,700		614,478
				5,943,846
Health Care – Products — 6.5%
Becton, Dickinson & Co.		13,900		2,549,816
C.R. Bard, Inc.		500		124,270
Danaher Corp.		100,560		8,600,897
DENTSPLY SIRONA, Inc.		1,300		81,172
Henry Schein, Inc. (a)		200		33,994
Intuitive Surgical, Inc. (a)		5,900		4,522,173
Stryker Corp.		33,030		4,348,399
Thermo Fisher Scientific, Inc.		23,571		3,620,506
				23,881,227
Health Care – Services — 4.4%
Aetna, Inc.		23,839		3,040,664
Cigna Corp.		10,800		1,582,092
Humana, Inc.		15,000		3,092,100
UnitedHealth Group, Inc.		50,300		8,249,703
				15,964,559
Pharmaceuticals — 2.5%
Allergan PLC		18,554		4,432,922
Bristol-Myers Squibb Co.		12,700		690,626
Eli Lilly & Co.		6,300		529,893
Merck & Co., Inc.		23,700		1,505,898
Shire PLC ADR (Ireland)		6,719		1,170,651
Zoetis, Inc.		17,900		955,323
				9,285,313
				74,290,597
Financial — 16.9%
Banks — 4.9%
The Bank of New York Mellon Corp.		25,800		1,218,534
Citigroup, Inc.		11,100		664,002
Citizens Financial Group, Inc.		36,000		1,243,800
First Republic Bank		11,369		1,066,526
The Goldman Sachs Group, Inc.		2,000		459,440
JP Morgan Chase & Co.		32,300		2,837,232
Morgan Stanley		177,500		7,604,100
State Street Corp.		37,400		2,977,414
				18,071,048
Diversified Financial Services — 7.9%
Ameriprise Financial, Inc.		3,000		389,040
The Charles Schwab Corp.		42,300		1,726,263
CME Group, Inc.		7,700		914,760
Intercontinental Exchange, Inc.		77,100		4,615,977
Mastercard, Inc. Class A		85,500		9,616,185
Visa, Inc. Class A		129,820		11,537,103
				28,799,328
Financial Services — 1.2%
TD Ameritrade Holding Corp.		110,100		4,278,486

	Number of Shares		Value
Insurance — 0.8%
Chubb Ltd.		2,100	$	286,125
Marsh & McLennan Cos., Inc.		21,100		1,559,079
The Progressive Corp.		4,200		164,556
Willis Towers Watson PLC		7,593		993,848
				3,003,608
Real Estate Investment Trusts (REITS) — 2.1%
American Tower Corp.		53,870		6,547,360
Equinix, Inc.		2,809		1,124,639
SBA Communications Corp. (a)		600		72,222
				7,744,221
				61,896,691
Industrial — 4.8%
Aerospace & Defense — 1.9%
The Boeing Co.		30,500		5,394,230
General Dynamics Corp.		1,500		280,800
Harris Corp.		3,600		400,572
Northrop Grumman Corp.		2,900		689,736
Raytheon Co.		300		45,750
Rockwell Collins, Inc.		3,000		291,480
				7,102,568
Building Materials — 0.1%
Johnson Controls International PLC		4,800		202,176
Electronics — 1.1%
Agilent Technologies, Inc.		1,700		89,879
Fortive Corp.		48,580		2,925,488
Honeywell International, Inc.		7,900		986,473
				4,001,840
Hand & Machine Tools — 0.0%
Stanley Black & Decker, Inc.		300		39,861
Machinery – Diversified — 0.4%
Roper Technologies, Inc.		6,000		1,238,940
Wabtec Corp.		1,315		102,570
				1,341,510
Miscellaneous – Manufacturing — 0.2%
Textron, Inc.		15,400		732,886
Packaging & Containers — 0.1%
Ball Corp.		7,308		542,692
Transportation — 1.0%
Canadian Pacific Railway Ltd.		5,100		749,292
FedEx Corp.		12,400		2,419,860
J.B. Hunt Transport Services, Inc.		5,000		458,700
Union Pacific Corp.		400		42,368
				3,670,220
				17,633,753
Technology — 12.8%
Computers — 1.5%
Apple, Inc.		38,167		5,483,071

The accompanying notes are an integral part of the portfolio of investments.

7

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

	Number of Shares		Value
Semiconductors — 1.8%
Analog Devices, Inc.		6,600	$	540,870
Broadcom Ltd.		14,500		3,174,920
KLA-Tencor Corp.		5,000		475,350
Microchip Technology, Inc.		6,200		457,436
NVIDIA Corp.		300		32,679
NXP Semiconductor NV (a)		18,557		1,920,650
				6,601,905
Software — 9.5%
Activision Blizzard, Inc.		3,400		169,524
Electronic Arts, Inc. (a)		15,200		1,360,704
Fidelity National Information Services, Inc.		21,450		1,707,849
Fiserv, Inc. (a)		34,140		3,936,683
Intuit, Inc.		10,300		1,194,697
Microsoft Corp.		196,400		12,934,904
Red Hat, Inc. (a)		28,048		2,426,152
salesforce.com, Inc. (a)		74,000		6,104,260
ServiceNow, Inc. (a)		41,850		3,660,620
Workday, Inc. Class A (a)		14,900		1,240,872
				34,736,265
				46,821,241
Utilities — 0.3%
Electric — 0.3%
NextEra Energy, Inc.		10,000		1,283,700
TOTAL COMMON STOCK (Cost $236,248,656)				365,743,763
TOTAL EQUITIES (Cost $236,248,656)				365,743,763
MUTUAL FUNDS — 0.0%
Diversified Financial Services — 0.0%
T. Rowe Price Reserve Investment Fund		1,006		1,006
TOTAL MUTUAL FUNDS (Cost $1,006)				1,006
TOTAL LONG-TERM INVESTMENTS (Cost $236,249,662)				365,744,769
	Principal Amount
SHORT-TERM INVESTMENTS — 0.7%
Repurchase Agreement — 0.7%
State Street Bank & Trust Co. Repurchase Agreement, dated 03/31/17, 0.050%, due 4/03/17 (b)	$	2,513,029		2,513,029

	Value
TOTAL SHORT-TERM INVESTMENTS (Cost $2,513,029)	$	2,513,029
TOTAL INVESTMENTS — 100.4% (Cost $238,762,691) (c)		368,257,798
Other Assets/(Liabilities) — (0.4)%		(1,547,863	)
NET ASSETS — 100.0%	$	366,709,935

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Maturity value of $2,513,039. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $2,565,193.

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

The accompanying notes are an integral part of the portfolio of investments.

8

MML Conservative Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 39.8%
MML Blue Chip Growth Fund, Initial Class (a)		794,161	$	12,245,958
MML Equity Income Fund, Initial Class (a)		987,049		12,022,256
MML Equity Index Fund, Class III (a)		426,163		11,979,450
MML Focused Equity Fund, Class II (a)		446,725		6,312,230
MML Foreign Fund, Initial Class (a)		948,226		9,586,563
MML Fundamental Growth Fund, Class II (a)		798,543		9,933,877
MML Fundamental Value Fund, Class II (a)		799,488		12,224,166
MML Global Fund, Class I (a)		964,709		12,020,269
MML Income & Growth Fund, Initial Class (a)		1,047,073		12,816,168
MML International Equity Fund, Class II (a)		746,686		7,653,536
MML Large Cap Growth Fund, Initial Class (a)		343,065		3,969,258
MML Mid Cap Growth Fund, Initial Class (a)		520,888		8,089,386
MML Mid Cap Value Fund, Initial Class (a)		813,506		9,916,643
MML Small Cap Growth Equity Fund, Initial Class (a)		176,970		2,381,613
MML Small Company Value Fund, Class II (a)		274,638		4,732,019
MML Small/Mid Cap Value Fund, Initial Class (a)		173,266		2,333,887
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares (a)		35,565		2,804,659
Oppenheimer Global Fund/VA, Non-Service Shares (a)		209,884		8,112,009
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares (a)		3,089,524		30,648,073
Oppenheimer International Growth Fund/VA, Non-Service Shares (a)		3,067,668		6,840,900
				186,622,920
Fixed Income Funds — 60.3%
MML Dynamic Bond Fund, Class II (a)		6,557,621		65,772,943
MML High Yield Fund, Class II (a)		1,460,124		15,010,079
MML Inflation-Protected and Income Fund, Initial Class (a)		1,889,300		19,478,682
MML Managed Bond Fund, Initial Class (a)		7,979,591		98,844,897

	Number of Shares		Value
MML Short-Duration Bond Fund, Class II (a)		2,504,417	$	24,593,372
MML Total Return Bond Fund, Class II (a)		5,727,917		59,283,936
				282,983,909
TOTAL MUTUAL FUNDS (Cost $470,323,376)				469,606,829
TOTAL LONG-TERM INVESTMENTS (Cost $470,323,376)				469,606,829
TOTAL INVESTMENTS — 100.1% (Cost $470,323,376) (b)				469,606,829
Other Assets/(Liabilities) — (0.1)%				(332,547	)
NET ASSETS — 100.0%			$	469,274,282

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer. See Note 4 for a summary of transactions in the investments of affiliated issuers.

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

The accompanying notes are an integral part of the portfolio of investments.

9

MML Equity Income Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.2%
COMMON STOCK — 96.1%
Basic Materials — 3.9%
Chemicals — 2.4%
CF Industries Holdings, Inc.		123,400	$	3,621,790
E.I. du Pont de Nemours & Co.		101,600		8,161,528
				11,783,318
Forest Products & Paper — 0.9%
International Paper Co.		87,400		4,438,172
Iron & Steel — 0.6%
Nucor Corp.		48,100		2,872,532
				19,094,022
Communications — 8.5%
Media — 4.2%
Comcast Corp. Class A		158,000		5,939,220
News Corp. Class A		290,300		3,773,900
Time Warner, Inc.		6,433		628,568
Twenty-First Century Fox, Inc. Class B		225,700		7,172,746
The Walt Disney Co.		23,900		2,710,021
				20,224,455
Telecommunications — 4.3%
CenturyLink, Inc.		83,305		1,963,499
Cisco Systems, Inc.		191,100		6,459,180
Telefonica SA		156,655		1,757,531
Verizon Communications, Inc.		191,835		9,351,956
Vodafone Group PLC		513,492		1,335,491
				20,867,657
				41,092,112
Consumer, Cyclical — 5.8%
Airlines — 0.4%
Southwest Airlines Co.		34,500		1,854,720
Auto Manufacturers — 0.4%
Ford Motor Co.		162,900		1,896,156
Auto Parts & Equipment — 0.7%
Adient PLC		48,081		3,494,046
Leisure Time — 0.6%
Carnival Corp.		53,100		3,128,121
Lodging — 1.0%
Las Vegas Sands Corp.		85,300		4,868,071
Retail — 1.9%
Kohl’s Corp.		73,300		2,918,073
Macy’s, Inc.		68,000		2,015,520
Wal-Mart Stores, Inc.		61,800		4,454,544
				9,388,137
Toys, Games & Hobbies — 0.8%
Mattel, Inc.		141,500		3,623,815
				28,253,066

	Number of Shares		Value
Consumer, Non-cyclical — 15.6%
Agriculture — 1.8%
Archer-Daniels-Midland Co.		125,300	$	5,768,812
Philip Morris International, Inc.		26,900		3,037,010
				8,805,822
Beverages — 1.8%
Diageo PLC		99,828		2,859,576
PepsiCo, Inc.		50,100		5,604,186
				8,463,762
Biotechnology — 0.8%
Gilead Sciences, Inc.		54,400		3,694,848
Cosmetics & Personal Care — 0.6%
Avon Products, Inc. (a)		140,700		619,080
Coty, Inc. Class A		119,373		2,164,232
				2,783,312
Foods — 1.2%
The Hershey Co.		6,700		731,975
Kellogg Co.		30,600		2,221,866
Tyson Foods, Inc. Class A		49,700		3,066,987
				6,020,828
Health Care – Products — 1.8%
Becton, Dickinson & Co.		21,300		3,907,272
Medtronic PLC		58,200		4,688,592
				8,595,864
Health Care – Services — 1.5%
Anthem, Inc.		45,000		7,442,100
Pharmaceuticals — 6.1%
Bristol-Myers Squibb Co.		80,000		4,350,400
GlaxoSmithKline PLC		122,642		2,551,174
Johnson & Johnson		73,700		9,179,335
Merck & Co., Inc.		71,700		4,555,818
Pfizer, Inc.		264,854		9,060,656
				29,697,383
				75,503,919
Energy — 9.8%
Oil & Gas — 9.8%
Apache Corp.		74,986		3,853,530
Canadian Natural Resources Ltd.		66,000		2,164,140
Chevron Corp.		46,700		5,014,179
EQT Corp.		16,380		1,000,818
Exxon Mobil Corp.		139,200		11,415,792
Hess Corp.		88,800		4,281,048
Occidental Petroleum Corp.		93,400		5,917,824
Royal Dutch Shell PLC A Shares Sponsored ADR (United Kingdom)		103,500		5,457,555
Total SA		171,796		8,678,951
				47,783,837
				47,783,837

The accompanying notes are an integral part of the portfolio of investments.

10

MML Equity Income Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Financial — 26.7%
Banks — 16.9%
Bank of America Corp.		96,477	$	2,275,893
The Bank of New York Mellon Corp.		85,600		4,042,888
Citigroup, Inc.		109,500		6,550,290
Fifth Third Bancorp		175,700		4,462,780
JP Morgan Chase & Co.		189,300		16,628,112
KeyCorp		199,700		3,550,666
Morgan Stanley		228,000		9,767,520
Northern Trust Corp.		59,100		5,116,878
The PNC Financial Services Group, Inc.		36,600		4,400,784
Royal Bank of Scotland Group PLC (a)		546,725		1,658,579
State Street Corp.		91,600		7,292,276
US Bancorp		106,300		5,474,450
Wells Fargo & Co.		199,900		11,126,434
				82,347,550
Diversified Financial Services — 2.3%
American Express Co.		51,800		4,097,898
Ameriprise Financial, Inc.		52,000		6,743,360
Och-Ziff Capital Management Group LLC Class A		111,610		252,239
				11,093,497
Insurance — 5.4%
Chubb Ltd.		15,208		2,072,090
Loews Corp.		147,900		6,917,283
Marsh & McLennan Cos., Inc.		74,500		5,504,805
MetLife, Inc.		148,300		7,833,206
Willis Towers Watson PLC		19,111		2,501,439
XL Group Ltd.		36,900		1,470,834
				26,299,657
Real Estate Investment Trusts (REITS) — 2.1%
Equity Residential		46,400		2,887,008
Rayonier, Inc.		123,341		3,495,484
Weyerhaeuser Co.		105,571		3,587,302
				9,969,794
				129,710,498
Industrial — 12.8%
Aerospace & Defense — 3.7%
The Boeing Co.		56,900		10,063,334
Harris Corp.		64,235		7,147,428
United Technologies Corp.		5,594		627,703
				17,838,465
Building Materials — 2.3%
Johnson Controls International PLC		184,915		7,788,620
Vulcan Materials Co.		29,800		3,590,304
				11,378,924

	Number of Shares		Value
Electrical Components & Equipment — 0.9%
Emerson Electric Co.		76,600	$	4,585,276
Electronics — 0.4%
TE Connectivity Ltd.		22,800		1,699,740
Machinery – Diversified — 1.1%
Cummins, Inc.		19,900		3,008,880
Flowserve Corp.		49,192		2,381,877
				5,390,757
Miscellaneous – Manufacturing — 3.3%
General Electric Co.		263,600		7,855,280
Illinois Tool Works, Inc.		40,300		5,338,541
Pentair PLC		47,500		2,982,050
				16,175,871
Transportation — 1.1%
United Parcel Service, Inc. Class B		49,200		5,279,160
				62,348,193
Technology — 7.0%
Computers — 1.1%
Apple, Inc.		15,500		2,226,730
Western Digital Corp.		35,500		2,929,815
				5,156,545
Semiconductors — 3.7%
Analog Devices, Inc.		26,057		2,135,371
Applied Materials, Inc.		146,800		5,710,520
QUALCOMM, Inc.		126,800		7,270,712
Texas Instruments, Inc.		38,173		3,075,217
				18,191,820
Software — 2.2%
CA, Inc.		25,300		802,516
Microsoft Corp.		150,400		9,905,344
				10,707,860
				34,056,225
Utilities — 6.0%
Electric — 4.9%
The AES Corp.		282,200		3,154,996
Edison International		59,400		4,728,834
Exelon Corp.		99,900		3,594,402
FirstEnergy Corp.		19,879		632,550
PG&E Corp.		98,400		6,529,824
The Southern Co.		33,400		1,662,652
Xcel Energy, Inc.		81,100		3,604,895
				23,908,153
Gas — 1.1%
NiSource, Inc.		220,000		5,233,800
				29,141,953
TOTAL COMMON STOCK (Cost $363,824,131)				466,983,825

The accompanying notes are an integral part of the portfolio of investments.

11

MML Equity Income Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
PREFERRED STOCK — 1.1%
Utilities — 1.1%
Electric — 1.1%
DTE Energy Co. 6.500%		15,505	$	833,084
Great Plains Energy, Inc. 7.000%		27,033		1,452,483
NextEra Energy, Inc. 6.123%		64,753		3,302,403
				5,587,970
TOTAL PREFERRED STOCK (Cost $5,297,591)				5,587,970
TOTAL EQUITIES (Cost $369,121,722)				472,571,795
	Principal Amount
BONDS & NOTES — 0.2%
CORPORATE DEBT — 0.2%
Computers — 0.2%
Western Digital Corp. 10.500% 4/01/24	$	695,000		819,231
TOTAL CORPORATE DEBT (Cost $683,554)				819,231
TOTAL BONDS & NOTES (Cost $683,554)				819,231
	Number of Shares
MUTUAL FUNDS — 0.0%
Diversified Financial Services — 0.0%
T. Rowe Price Reserve Investment Fund		1,007		1,007
TOTAL MUTUAL FUNDS (Cost $1,007)				1,007
TOTAL LONG-TERM INVESTMENTS (Cost $369,806,283)				473,392,033
	Principal Amount
SHORT-TERM INVESTMENTS — 1.8%
Repurchase Agreement — 1.8%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	8,505,367		8,505,367
TOTAL SHORT-TERM INVESTMENTS (Cost $8,505,367)				8,505,367

	Value
TOTAL INVESTMENTS — 99.2% (Cost $378,311,650) (c)	$	481,897,400
Other Assets/(Liabilities) — 0.8%		4,009,659
NET ASSETS — 100.0%	$	485,907,059

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Maturity value of $8,505,403. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $8,676,388.

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

The accompanying notes are an integral part of the portfolio of investments.

12

MML Equity Index Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.3%
COMMON STOCK — 98.3%
Basic Materials — 2.3%
Chemicals — 1.9%
Air Products & Chemicals, Inc.		7,197	$	973,682
Albemarle Corp.		3,759		397,101
CF Industries Holdings, Inc.		7,717		226,494
The Dow Chemical Co.		37,138		2,359,748
E.I. du Pont de Nemours & Co.		28,811		2,314,388
Eastman Chemical Co.		4,893		395,354
FMC Corp.		4,429		308,214
International Flavors & Fragrances, Inc.		2,590		343,253
LyondellBasell Industries NV Class A		10,959		999,351
Monsanto Co.		14,603		1,653,060
The Mosaic Co.		11,736		342,456
PPG Industries, Inc.		8,545		897,909
Praxair, Inc.		9,452		1,121,007
The Sherwin-Williams Co.		2,711		840,925
				13,172,942
Forest Products & Paper — 0.1%
International Paper Co.		13,632		692,233
Iron & Steel — 0.1%
Nucor Corp.		10,551		630,106
Mining — 0.2%
Freeport-McMoRan, Inc. (a)		43,896		586,451
Newmont Mining Corp.		17,587		579,667
				1,166,118
				15,661,399
Communications — 13.6%
Advertising — 0.2%
The Interpublic Group of Cos., Inc.		12,950		318,181
Omnicom Group, Inc.		7,809		673,214
				991,395
Internet — 7.1%
Alphabet, Inc. Class A (a)		9,877		8,373,721
Alphabet, Inc. Class C (a)		9,823		8,148,768
Amazon.com, Inc. (a)		13,168		11,673,959
eBay, Inc. (a)		33,608		1,128,220
Expedia, Inc.		3,999		504,554
F5 Networks, Inc. (a)		2,162		308,236
Facebook, Inc. Class A (a)		78,304		11,123,083
Netflix, Inc. (a)		14,309		2,115,013
The Priceline Group, Inc. (a)		1,636		2,912,031
Symantec Corp.		20,653		633,634
TripAdvisor, Inc. (a)		3,851		166,209
VeriSign, Inc. (a)		3,006		261,853

	Number of Shares		Value
Yahoo!, Inc. (a)		29,083	$	1,349,742
				48,699,023
Media — 3.0%
CBS Corp. Class B		12,320		854,515
Charter Communications, Inc. Class A (a)		7,145		2,338,701
Comcast Corp. Class A		157,379		5,915,877
Discovery Communications, Inc. Class A (a)		5,118		148,883
Discovery Communications, Inc. Class C (a)		7,026		198,906
DISH Network Corp. Class A (a)		7,504		476,429
News Corp. Class A		13,028		169,364
News Corp. Class B		3,915		52,853
Scripps Networks Interactive Class A		3,150		246,866
TEGNA, Inc.		7,231		185,258
Time Warner, Inc.		25,744		2,515,446
Twenty-First Century Fox, Inc. Class A		35,077		1,136,144
Twenty-First Century Fox, Inc. Class B		16,125		512,453
Viacom, Inc. Class B		11,504		536,316
The Walt Disney Co.		48,365		5,484,107
				20,772,118
Telecommunications — 3.3%
AT&T, Inc.		204,226		8,485,590
CenturyLink, Inc.		18,117		427,018
Cisco Systems, Inc.		166,367		5,623,205
Juniper Networks, Inc.		12,727		354,192
Level 3 Communications, Inc. (a)		9,667		553,146
Motorola Solutions, Inc.		5,494		473,693
Verizon Communications, Inc.		135,552		6,608,160
				22,525,004
				92,987,540
Consumer, Cyclical — 8.8%
Airlines — 0.6%
Alaska Air Group, Inc.		4,104		378,471
American Airlines Group, Inc.		16,811		711,105
Delta Air Lines, Inc.		24,179		1,111,267
Southwest Airlines Co.		20,403		1,096,865
United Continental Holdings, Inc. (a)		9,565		675,672
				3,973,380
Apparel — 0.6%
Hanesbrands, Inc.		12,512		259,749
Michael Kors Holdings Ltd. (a)		5,485		209,033
NIKE, Inc. Class B		44,025		2,453,513
Ralph Lauren Corp.		1,933		157,772
Under Armour, Inc. Class A (a)		5,899		116,682
Under Armour, Inc. Class C (a)		6,326		115,766

The accompanying notes are an integral part of the portfolio of investments.

13

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
VF Corp.		10,953	$	602,087
				3,914,602
Auto Manufacturers — 0.6%
Ford Motor Co.		130,066		1,513,968
General Motors Co.		45,297		1,601,702
PACCAR, Inc.		11,608		780,058
				3,895,728
Auto Parts & Equipment — 0.2%
BorgWarner, Inc.		6,641		277,528
Delphi Automotive PLC		8,980		722,800
The Goodyear Tire & Rubber Co.		8,259		297,324
				1,297,652
Distribution & Wholesale — 0.2%
Fastenal Co.		9,562		492,443
LKQ Corp. (a)		10,367		303,442
W.W. Grainger, Inc.		1,812		421,761
				1,217,646
Home Builders — 0.1%
D.R. Horton, Inc.		11,334		377,536
Lennar Corp. Class A		6,792		347,682
PulteGroup, Inc.		9,426		221,982
				947,200
Home Furnishing — 0.1%
Leggett & Platt, Inc.		4,420		222,414
Whirlpool Corp.		2,485		425,755
				648,169
Housewares — 0.1%
Newell Brands, Inc.		15,972		753,399
Leisure Time — 0.2%
Carnival Corp.		13,898		818,731
Harley-Davidson, Inc.		5,932		358,886
Royal Caribbean Cruises Ltd.		5,548		544,314
				1,721,931
Lodging — 0.2%
Marriott International, Inc. Class A		10,451		984,275
Wyndham Worldwide Corp.		3,525		297,122
Wynn Resorts Ltd.		2,629		301,310
				1,582,707
Retail — 5.7%
Advance Auto Parts, Inc.		2,456		364,127
AutoNation, Inc. (a)		2,099		88,767
AutoZone, Inc. (a)		941		680,390
Bed Bath & Beyond, Inc.		5,068		199,983
Best Buy Co., Inc.		9,071		445,840
CarMax, Inc. (a)		6,167		365,210
Chipotle Mexican Grill, Inc. (a)		964		429,481
Coach, Inc.		9,350		386,435
Costco Wholesale Corp.		14,581		2,445,088

	Number of Shares		Value
CVS Health Corp.		34,086	$	2,675,751
Darden Restaurants, Inc.		4,157		347,816
Dollar General Corp.		8,402		585,871
Dollar Tree, Inc. (a)		7,801		612,066
Foot Locker, Inc.		4,372		327,069
The Gap, Inc.		7,404		179,843
Genuine Parts Co.		4,930		455,581
The Home Depot, Inc.		40,476		5,943,091
Kohl’s Corp.		5,833		232,212
L Brands, Inc.		7,986		376,141
Lowe’s Cos., Inc.		28,830		2,370,114
Macy’s, Inc.		10,280		304,699
McDonald’s Corp.		27,213		3,527,077
Nordstrom, Inc.		3,697		172,169
O’Reilly Automotive, Inc. (a)		3,040		820,314
PVH Corp.		2,617		270,781
Ross Stores, Inc.		13,140		865,532
Signet Jewelers Ltd.		2,359		163,408
Staples, Inc.		21,700		190,309
Starbucks Corp.		48,443		2,828,587
Target Corp.		18,603		1,026,700
Tiffany & Co.		3,602		343,271
The TJX Cos., Inc.		21,733		1,718,646
Tractor Supply Co.		4,288		295,743
Ulta Salon Cosmetics & Fragrance, Inc. (a)		1,943		554,202
Wal-Mart Stores, Inc.		50,057		3,608,109
Walgreens Boots Alliance, Inc.		28,370		2,356,128
Yum! Brands, Inc.		11,162		713,252
				39,269,803
Textiles — 0.1%
Mohawk Industries, Inc. (a)		2,084		478,257
Toys, Games & Hobbies — 0.1%
Hasbro, Inc.		3,754		374,724
Mattel, Inc.		11,317		289,829
				664,553
				60,365,027
Consumer, Non-cyclical — 22.3%
Agriculture — 1.9%
Altria Group, Inc.		64,437		4,602,090
Archer-Daniels-Midland Co.		19,069		877,937
Philip Morris International, Inc.		51,583		5,823,721
Reynolds American, Inc.		27,578		1,737,966
				13,041,714
Beverages — 2.0%
Brown-Forman Corp. Class B		5,966		275,510
The Coca-Cola Co.		128,431		5,450,611
Constellation Brands, Inc. Class A		5,741		930,444
Dr. Pepper Snapple Group, Inc.		6,088		596,137
Molson Coors Brewing Co. Class B		6,101		583,927
Monster Beverage Corp. (a)		13,434		620,248

The accompanying notes are an integral part of the portfolio of investments.

14

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
PepsiCo, Inc.		47,434	$	5,305,967
				13,762,844
Biotechnology — 2.4%
Alexion Pharmaceuticals, Inc. (a)		7,432		901,056
Amgen, Inc.		24,490		4,018,074
Biogen, Inc. (a)		7,178		1,962,609
Celgene Corp. (a)		25,874		3,219,502
Gilead Sciences, Inc.		43,460		2,951,803
Illumina, Inc. (a)		4,869		830,846
Incyte Corp. (a)		5,873		785,044
Regeneron Pharmaceuticals, Inc. (a)		2,531		980,788
Vertex Pharmaceuticals, Inc. (a)		8,218		898,638
				16,548,360
Commercial Services — 1.4%
Automatic Data Processing, Inc.		14,954		1,531,140
Cintas Corp.		2,884		364,941
Ecolab, Inc.		8,766		1,098,730
Equifax, Inc.		3,969		542,721
Global Payments, Inc.		5,110		412,275
H&R Block, Inc.		7,043		163,750
Moody’s Corp.		5,518		618,237
Nielsen Holdings PLC		11,132		459,863
PayPal Holdings, Inc. (a)		37,428		1,610,153
Quanta Services, Inc. (a)		5,077		188,407
Robert Half International, Inc.		4,296		209,774
S&P Global, Inc.		8,596		1,123,841
Total System Services, Inc.		5,475		292,694
United Rentals, Inc. (a)		2,825		353,266
Verisk Analytics, Inc. (a)		5,162		418,845
The Western Union Co.		16,044		326,495
				9,715,132
Cosmetics & Personal Care — 1.6%
Colgate-Palmolive Co.		29,313		2,145,419
Coty, Inc. Class A		15,568		282,248
The Estee Lauder Cos., Inc. Class A		7,365		624,478
The Procter & Gamble Co.		85,012		7,638,328
				10,690,473
Foods — 1.6%
Campbell Soup Co.		6,461		369,828
Conagra Brands, Inc.		13,783		556,006
General Mills, Inc.		19,290		1,138,303
The Hershey Co.		4,627		505,500
Hormel Foods Corp.		8,936		309,454
The J.M. Smucker Co.		3,855		505,313
Kellogg Co.		8,370		607,746
The Kraft Heinz Co.		19,772		1,795,495
The Kroger Co.		30,687		904,960
McCormick & Co., Inc.		3,817		372,348
Mondelez International, Inc. Class A		50,758		2,186,655
Sysco Corp.		16,487		856,005
Tyson Foods, Inc. Class A		9,469		584,332

	Number of Shares		Value
Whole Foods Market, Inc.		10,723	$	318,687
				11,010,632
Health Care – Products — 2.9%
Abbott Laboratories		57,411		2,549,622
Baxter International, Inc.		16,230		841,688
Becton, Dickinson & Co.		7,094		1,301,323
Boston Scientific Corp. (a)		45,133		1,122,458
C.R. Bard, Inc.		2,385		592,768
The Cooper Cos., Inc.		1,642		328,219
Danaher Corp.		20,294		1,735,746
DENTSPLY SIRONA, Inc.		7,643		477,229
Edwards Lifesciences Corp. (a)		7,086		666,580
Henry Schein, Inc. (a)		2,661		452,290
Hologic, Inc. (a)		9,278		394,779
IDEXX Laboratories, Inc. (a)		2,905		449,142
Intuitive Surgical, Inc. (a)		1,219		934,327
Medtronic PLC		45,511		3,666,366
Patterson Cos., Inc.		2,640		119,407
Stryker Corp.		10,304		1,356,522
Thermo Fisher Scientific, Inc.		12,961		1,990,810
Varian Medical Systems, Inc. (a)		3,090		281,592
Zimmer Biomet Holdings, Inc.		6,722		820,823
				20,081,691
Health Care – Services — 2.0%
Aetna, Inc.		11,702		1,492,590
Anthem, Inc.		8,787		1,453,194
Centene Corp. (a)		5,690		405,469
Cigna Corp.		8,571		1,255,566
DaVita, Inc. (a)		5,135		349,026
Envision Healthcare Corp. (a)		3,881		237,983
HCA Holdings, Inc. (a)		9,560		850,744
Humana, Inc.		4,986		1,027,814
Laboratory Corp. of America Holdings (a)		3,408		488,946
Quest Diagnostics, Inc.		4,589		450,594
UnitedHealth Group, Inc.		31,986		5,246,024
Universal Health Services, Inc. Class B		2,996		372,852
				13,630,802
Household Products & Wares — 0.4%
Avery Dennison Corp.		2,963		238,818
Church & Dwight Co., Inc.		8,366		417,212
The Clorox Co.		4,263		574,780
Kimberly-Clark Corp.		11,866		1,561,922
				2,792,732
Pharmaceuticals — 6.1%
AbbVie, Inc.		53,005		3,453,806
Allergan PLC		11,152		2,664,436
AmerisourceBergen Corp.		5,542		490,467
Bristol-Myers Squibb Co.		55,619		3,024,561
Cardinal Health, Inc.		10,476		854,318

The accompanying notes are an integral part of the portfolio of investments.

15

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Eli Lilly & Co.		32,316	$	2,718,099
Express Scripts Holding Co. (a)		20,129		1,326,702
Johnson & Johnson		90,179		11,231,794
Mallinckrodt PLC (a)		3,482		155,193
McKesson Corp.		7,027		1,041,823
Mead Johnson Nutrition Co.		6,121		545,259
Merck & Co., Inc.		91,232		5,796,881
Mylan NV (a)		15,244		594,363
Perrigo Co. PLC		4,794		318,274
Pfizer, Inc.		197,915		6,770,672
Zoetis, Inc.		16,367		873,507
				41,860,155
				153,134,535
Diversified — 0.0%
Holding Company – Diversified — 0.0%
Leucadia National Corp.		10,713		278,538
Energy — 6.5%
Oil & Gas — 5.1%
Anadarko Petroleum Corp.		18,515		1,147,930
Apache Corp.		12,562		645,561
Cabot Oil & Gas Corp.		15,592		372,805
Chesapeake Energy Corp. (a)		25,699		152,652
Chevron Corp.		62,957		6,759,693
Cimarex Energy Co.		3,165		378,186
Concho Resources, Inc. (a)		4,938		633,743
ConocoPhillips		41,056		2,047,463
Devon Energy Corp.		17,345		723,633
EOG Resources, Inc.		19,207		1,873,643
EQT Corp.		5,799		354,319
Exxon Mobil Corp.		137,882		11,307,703
Helmerich & Payne, Inc.		3,574		237,921
Hess Corp.		9,044		436,011
Marathon Oil Corp.		28,064		443,411
Marathon Petroleum Corp.		17,489		883,894
Murphy Oil Corp.		5,553		158,760
Newfield Exploration Co. (a)		6,525		240,838
Noble Energy, Inc.		14,501		497,964
Occidental Petroleum Corp.		25,479		1,614,349
Phillips 66		14,666		1,161,841
Pioneer Natural Resources Co.		5,623		1,047,171
Range Resources Corp.		6,298		183,272
Southwestern Energy Co. (a)		16,593		135,565
Tesoro Corp.		3,927		318,323
Transocean Ltd. (a)		13,142		163,618
Valero Energy Corp.		15,001		994,416
				34,914,685
Oil & Gas Services — 1.0%
Baker Hughes, Inc.		14,186		848,606
Halliburton Co.		28,865		1,420,447
National Oilwell Varco, Inc.		12,498		501,045
Schlumberger Ltd.		46,348		3,619,779

	Number of Shares		Value
TechnipFMC PLC (a)		15,565	$	505,862
				6,895,739
Pipelines — 0.4%
Kinder Morgan, Inc.		63,610		1,382,882
ONEOK, Inc.		6,968		386,306
The Williams Cos., Inc.		27,502		813,784
				2,582,972
				44,393,396
Financial — 18.1%
Banks — 7.7%
Bank of America Corp.		333,350		7,863,726
The Bank of New York Mellon Corp.		34,509		1,629,860
BB&T Corp.		26,886		1,201,804
Capital One Financial Corp.		15,972		1,384,133
Citigroup, Inc.		92,123		5,510,798
Citizens Financial Group, Inc.		16,952		585,692
Comerica, Inc.		5,872		402,702
Fifth Third Bancorp		25,027		635,686
The Goldman Sachs Group, Inc.		12,327		2,831,758
Huntington Bancshares, Inc.		35,920		480,969
JP Morgan Chase & Co.		118,764		10,432,230
KeyCorp		35,802		636,560
M&T Bank Corp.		5,138		795,003
Morgan Stanley		47,820		2,048,609
Northern Trust Corp.		6,732		582,857
The PNC Financial Services Group, Inc.		16,204		1,948,369
Regions Financial Corp.		40,061		582,086
State Street Corp.		12,027		957,469
SunTrust Banks, Inc.		16,261		899,233
US Bancorp		52,986		2,728,779
Wells Fargo & Co.		149,658		8,329,964
Zions Bancorp		6,735		282,870
				52,751,157
Diversified Financial Services — 3.3%
Affiliated Managers Group, Inc.		1,887		309,355
Alliance Data Systems Corp.		1,858		462,642
American Express Co.		25,170		1,991,199
Ameriprise Financial, Inc.		5,126		664,740
BlackRock, Inc.		4,058		1,556,283
CBOE Holdings, Inc.		3,060		248,074
The Charles Schwab Corp.		40,423		1,649,663
CME Group, Inc.		11,334		1,346,479
Discover Financial Services		12,824		877,033
E*TRADE Financial Corp. (a)		9,075		316,627
Franklin Resources, Inc.		11,509		484,989
Intercontinental Exchange, Inc.		19,755		1,182,732
Invesco Ltd.		13,287		406,981
Mastercard, Inc. Class A		31,308		3,521,211
Nasdaq, Inc.		3,782		262,660
Navient Corp.		9,488		140,043

The accompanying notes are an integral part of the portfolio of investments.

16

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Raymond James Financial, Inc.		4,271	$	325,706
Synchrony Financial		25,621		878,800
T. Rowe Price Group, Inc.		8,072		550,107
Visa, Inc. Class A		61,763		5,488,878
				22,664,202
Insurance — 4.2%
Aflac, Inc.		13,336		965,793
The Allstate Corp.		12,199		994,096
American International Group, Inc.		30,942		1,931,709
Aon PLC		8,719		1,034,858
Arthur J Gallagher & Co.		5,983		338,279
Assurant, Inc.		1,812		173,354
Berkshire Hathaway, Inc. Class B (a)		63,146		10,525,175
Chubb Ltd.		15,495		2,111,194
Cincinnati Financial Corp.		5,016		362,506
The Hartford Financial Services Group, Inc.		12,497		600,731
Lincoln National Corp.		7,427		486,097
Loews Corp.		9,160		428,413
Marsh & McLennan Cos., Inc.		17,090		1,262,780
MetLife, Inc.		36,149		1,909,390
Principal Financial Group, Inc.		8,863		559,344
The Progressive Corp.		19,221		753,079
Prudential Financial, Inc.		14,340		1,529,791
Torchmark Corp.		3,647		280,965
The Travelers Cos., Inc.		9,288		1,119,576
Unum Group		7,548		353,926
Willis Towers Watson PLC		4,256		557,068
XL Group Ltd.		8,736		348,217
				28,626,341
Real Estate Investment Trusts (REITS) — 2.9%
Alexandria Real Estate Equities, Inc.		2,971		328,355
American Tower Corp.		14,213		1,727,448
Apartment Investment & Management Co. Class A		5,197		230,487
AvalonBay Communities, Inc.		4,550		835,380
Boston Properties, Inc.		5,095		674,629
CBRE Group, Inc. Class A (a)		9,937		345,708
Crown Castle International Corp.		11,953		1,128,961
Digital Realty Trust, Inc.		5,267		560,356
Equinix, Inc.		2,583		1,034,156
Equity Residential		12,272		763,564
Essex Property Trust, Inc.		2,170		502,420
Extra Space Storage, Inc.		4,237		315,190
Federal Realty Investment Trust		2,416		322,536
GGP, Inc.		19,336		448,208
HCP, Inc.		15,482		484,277
Host Hotels & Resorts, Inc.		24,514		457,431
Iron Mountain, Inc.		8,008		285,645
Kimco Realty Corp.		14,288		315,622
The Macerich Co.		3,989		256,892
Mid-America Apartment Communities, Inc.		3,787		385,289

	Number of Shares		Value
Prologis, Inc.		17,721	$	919,366
Public Storage		4,989		1,092,142
Realty Income Corp.		9,056		539,104
Regency Centers Corp.		4,851		322,058
Simon Property Group, Inc.		10,646		1,831,431
SL Green Realty Corp.		3,385		360,909
UDR, Inc.		8,837		320,430
Ventas, Inc.		11,732		763,049
Vornado Realty Trust		5,701		571,867
Welltower, Inc.		12,008		850,407
Weyerhaeuser Co.		24,793		842,466
				19,815,783
Savings & Loans — 0.0%
People’s United Financial, Inc.		11,419		207,826
				124,065,309
Industrial — 9.7%
Aerospace & Defense — 2.2%
Arconic, Inc.		14,568		383,721
The Boeing Co.		18,939		3,349,551
General Dynamics Corp.		9,488		1,776,154
Harris Corp.		4,110		457,320
L3 Technologies, Inc.		2,620		433,060
Lockheed Martin Corp.		8,298		2,220,545
Northrop Grumman Corp.		5,800		1,379,472
Raytheon Co.		9,731		1,483,977
Rockwell Collins, Inc.		4,325		420,217
TransDigm Group, Inc.		1,668		367,227
United Technologies Corp.		24,915		2,795,712
				15,066,956
Building Materials — 0.4%
Fortune Brands Home & Security, Inc.		5,051		307,354
Johnson Controls International PLC		31,285		1,317,724
Martin Marietta Materials, Inc.		2,101		458,543
Masco Corp.		10,671		362,707
Vulcan Materials Co.		4,377		527,341
				2,973,669
Electrical Components & Equipment — 0.3%
Acuity Brands, Inc.		1,488		303,552
AMETEK, Inc.		7,679		415,280
Emerson Electric Co.		21,476		1,285,554
				2,004,386
Electronics — 1.2%
Agilent Technologies, Inc.		10,739		567,771
Allegion PLC		3,172		240,120
Amphenol Corp. Class A		10,219		727,286
Corning, Inc.		30,872		833,544
FLIR Systems, Inc.		4,646		168,557
Fortive Corp.		9,968		600,273
Garmin Ltd.		3,849		196,722

The accompanying notes are an integral part of the portfolio of investments.

17

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Honeywell International, Inc.		25,262	$	3,154,466
Mettler-Toledo International, Inc. (a)		871		417,131
PerkinElmer, Inc.		3,654		212,151
TE Connectivity Ltd.		11,772		877,603
Waters Corp. (a)		2,674		417,973
				8,413,597
Engineering & Construction — 0.1%
Fluor Corp.		4,573		240,631
Jacobs Engineering Group, Inc.		4,030		222,779
				463,410
Environmental Controls — 0.2%
Republic Services, Inc.		7,637		479,680
Stericycle, Inc. (a)		2,839		235,325
Waste Management, Inc.		13,471		982,305
				1,697,310
Hand & Machine Tools — 0.1%
Snap-on, Inc.		1,951		329,075
Stanley Black & Decker, Inc.		5,067		673,252
				1,002,327
Machinery – Construction & Mining — 0.3%
Caterpillar, Inc.		19,507		1,809,469
Machinery – Diversified — 0.5%
Cummins, Inc.		5,174		782,309
Deere & Co.		9,741		1,060,405
Flowserve Corp.		4,341		210,191
Rockwell Automation, Inc.		4,251		661,923
Roper Technologies, Inc.		3,405		703,099
Xylem, Inc.		5,927		297,654
				3,715,581
Miscellaneous – Manufacturing — 2.6%
3M Co.		19,807		3,789,673
Dover Corp.		5,164		414,927
Eaton Corp. PLC		14,971		1,110,100
General Electric Co.		290,054		8,643,609
Illinois Tool Works, Inc.		10,353		1,371,462
Ingersoll-Rand PLC		8,686		706,346
Parker-Hannifin Corp.		4,419		708,454
Pentair PLC		5,618		352,698
Textron, Inc.		8,969		426,835
				17,524,104
Packaging & Containers — 0.2%
Ball Corp.		5,797		430,485
Sealed Air Corp.		6,541		285,057
WestRock Co.		8,322		432,994
				1,148,536
Transportation — 1.6%
C.H. Robinson Worldwide, Inc.		4,721		364,886
CSX Corp.		30,798		1,433,647

	Number of Shares		Value
Expeditors International of Washington, Inc.		6,053	$	341,934
FedEx Corp.		8,148		1,590,082
J.B. Hunt Transport Services, Inc.		2,892		265,312
Kansas City Southern		3,513		301,275
Norfolk Southern Corp.		9,675		1,083,310
Ryder System, Inc.		1,824		137,603
Union Pacific Corp.		27,046		2,864,712
United Parcel Service, Inc. Class B		22,935		2,460,925
				10,843,686
				66,663,031
Technology — 13.9%
Computers — 5.5%
Accenture PLC Class A		20,691		2,480,437
Apple, Inc.		174,439		25,059,907
Cognizant Technology Solutions Corp. Class A (a)		20,276		1,206,828
CSRA, Inc.		4,677		136,989
Hewlett Packard Enterprise Co.		55,195		1,308,122
HP, Inc.		56,113		1,003,300
International Business Machines Corp.		28,535		4,969,085
NetApp, Inc.		8,944		374,306
Seagate Technology PLC		9,758		448,185
Teradata Corp. (a)		4,409		137,208
Western Digital Corp.		9,589		791,380
				37,915,747
Office & Business Equipment — 0.0%
Xerox Corp.		28,420		208,603
Semiconductors — 3.4%
Advanced Micro Devices, Inc. (a)		25,659		373,338
Analog Devices, Inc.		12,062		988,481
Applied Materials, Inc.		35,839		1,394,137
Broadcom Ltd.		13,338		2,920,488
Intel Corp.		157,090		5,666,236
KLA-Tencor Corp.		5,180		492,463
Lam Research Corp.		5,395		692,502
Microchip Technology, Inc.		7,155		527,896
Micron Technology, Inc. (a)		34,603		1,000,027
NVIDIA Corp.		19,586		2,133,503
Qorvo, Inc. (a)		4,230		290,009
QUALCOMM, Inc.		49,126		2,816,885
Skyworks Solutions, Inc.		6,158		603,361
Texas Instruments, Inc.		33,265		2,679,828
Xilinx, Inc.		8,366		484,308
				23,063,462
Software — 5.0%
Activision Blizzard, Inc.		22,995		1,146,531
Adobe Systems, Inc. (a)		16,480		2,144,542
Akamai Technologies, Inc. (a)		5,795		345,962
Autodesk, Inc. (a)		6,488		561,017

The accompanying notes are an integral part of the portfolio of investments.

18

MML Equity Index Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
CA, Inc.		10,524	$	333,821
Cerner Corp. (a)		9,737		573,023
Citrix Systems, Inc. (a)		5,176		431,627
The Dun & Bradstreet Corp.		1,182		127,585
Electronic Arts, Inc. (a)		10,243		916,953
Fidelity National Information Services, Inc.		10,995		875,422
Fiserv, Inc. (a)		7,099		818,586
Intuit, Inc.		8,081		937,315
Microsoft Corp.		256,929		16,921,344
Oracle Corp.		99,640		4,444,940
Paychex, Inc.		10,664		628,110
Red Hat, Inc. (a)		5,948		514,502
salesforce.com, Inc. (a)		21,771		1,795,890
Synopsys, Inc. (a)		5,009		361,299
				33,878,469
				95,066,281
Utilities — 3.1%
Electric — 2.8%
The AES Corp.		21,633		241,857
Alliant Energy Corp.		7,693		304,720
Ameren Corp.		8,047		439,286
American Electric Power Co., Inc.		16,304		1,094,488
CMS Energy Corp.		9,278		415,098
Consolidated Edison, Inc.		10,097		784,133
Dominion Resources, Inc.		20,916		1,622,454
DTE Energy Co.		5,957		608,269
Duke Energy Corp.		23,315		1,912,063
Edison International		10,810		860,584
Entergy Corp.		5,926		450,139
Eversource Energy		10,505		617,484
Exelon Corp.		30,882		1,111,134
FirstEnergy Corp.		14,753		469,440
NextEra Energy, Inc.		15,574		1,999,234
NRG Energy, Inc.		10,671		199,548
PG&E Corp.		16,779		1,113,454
Pinnacle West Capital Corp.		3,749		312,592
PPL Corp.		22,541		842,808
Public Service Enterprise Group, Inc.		16,764		743,483
SCANA Corp.		4,728		308,975
The Southern Co.		33,016		1,643,537
WEC Energy Group, Inc.		10,460		634,190
Xcel Energy, Inc.		16,856		749,249
				19,478,219
Gas — 0.2%
CenterPoint Energy, Inc.		14,361		395,932
NiSource, Inc.		10,648		253,316
Sempra Energy		8,382		926,211
				1,575,459

	Number of Shares		Value
Water — 0.1%
American Water Works Co., Inc.		5,892	$	458,221
				21,511,899
TOTAL COMMON STOCK (Cost $434,675,346)				674,126,955
TOTAL EQUITIES (Cost $434,675,346)				674,126,955
TOTAL LONG-TERM INVESTMENTS (Cost $434,675,346)				674,126,955
	Principal Amount
SHORT-TERM INVESTMENTS — 1.7%
Repurchase Agreement — 1.5%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	10,138,505		10,138,505
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		652		652
U.S. Treasury Bill — 0.2%
U.S. Treasury Bill (c) 0.000% 8/17/17		1,255,000		1,251,261
TOTAL SHORT-TERM INVESTMENTS (Cost $11,390,632)				11,390,418
TOTAL INVESTMENTS — 100.0% (Cost $446,065,978) (d)				685,517,373
Other Assets/(Liabilities) — 0.0%				234,624
NET ASSETS — 100.0%			$	685,751,997

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Maturity value of $10,138,547. Collateralized by U.S. Government Agency obligations with a rate of 1.500%, maturity date of 1/31/22, and an aggregate market value, including accrued interest, of $10,343,376.

(c) A portion of this security is pledged/held as collateral for open futures contracts. (Note 2).

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

The accompanying notes are an integral part of the portfolio of investments.

19

MML Focused Equity Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 94.9%
COMMON STOCK — 94.9%
Communications — 23.9%
Internet — 10.3%
Alphabet, Inc. Class C (a)		8,100	$	6,719,436
CDW Corp.		91,800		5,297,778
				12,017,214
Media — 9.4%
Charter Communications, Inc. Class A (a)		20,800		6,808,256
Tribune Media Co. Class A		110,700		4,125,789
				10,934,045
Telecommunications — 4.2%
CommScope Holding Co., Inc. (a)		117,900		4,917,609
				27,868,868
Consumer, Cyclical — 15.0%
Auto Manufacturers — 6.2%
General Motors Co.		206,000		7,284,160
Retail — 8.8%
CarMax, Inc. (a)		82,600		4,891,572
Tiffany & Co.		56,700		5,403,510
				10,295,082
				17,579,242
Consumer, Non-cyclical — 18.1%
Commercial Services — 3.5%
Moody’s Corp.		36,800		4,123,072
Health Care – Products — 5.0%
Baxter International, Inc.		113,800		5,901,668
Health Care – Services — 9.6%
HCA Holdings, Inc. (a)		75,900		6,754,341
Quintiles IMS Holdings, Inc. (a)		54,700		4,404,991
				11,159,332
				21,184,072
Financial — 31.7%
Banks — 15.0%
Citigroup, Inc.		97,900		5,856,378
JP Morgan Chase & Co.		45,100		3,961,584
Wells Fargo & Co.		138,700		7,720,042
				17,538,004
Diversified Financial Services — 4.2%
BlackRock, Inc.		12,900		4,947,279
Insurance — 8.9%
American International Group, Inc.		84,300		5,262,849
Aon PLC		42,800		5,079,932
				10,342,781

	Number of Shares		Value
Real Estate Investment Trusts (REITS) — 3.6%
CBRE Group, Inc. Class A (a)		120,400	$	4,188,716
				37,016,780
Industrial — 6.2%
Machinery – Construction & Mining — 3.8%
Caterpillar, Inc.		47,900		4,443,204
Machinery – Diversified — 2.4%
Cummins, Inc.		18,400		2,782,080
				7,225,284
TOTAL COMMON STOCK (Cost $87,425,932)				110,874,246
TOTAL EQUITIES (Cost $87,425,932)				110,874,246
TOTAL LONG-TERM INVESTMENTS (Cost $87,425,932)				110,874,246
	Principal Amount
SHORT-TERM INVESTMENTS — 5.2%
Repurchase Agreement — 5.2%
State Street Bank & Trust Co. Repurchase Agreement, dated 03/31/17, 0.050%, due 4/03/17 (b)	$	6,078,240		6,078,240
TOTAL SHORT-TERM INVESTMENTS (Cost $6,078,240)				6,078,240
TOTAL INVESTMENTS —100.1% (Cost $93,504,172) (c)				116,952,486
Other Assets/(Liabilities) — (0.1)%				(171,784	)
NET ASSETS — 100.0%			$	116,780,702

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Maturity value of $6,078,265. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 5/15/18, and an aggregate market value, including accrued interest, of $6,204,577.

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

The accompanying notes are an integral part of the portfolio of investments.

20

MML Foreign Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 96.7%
COMMON STOCK — 96.7%
Bermuda — 0.4%
Kunlun Energy Co. Ltd		1,700,000	$	1,576,206
Brazil — 0.5%
Embraer SA Sponsored ADR		84,639		1,868,829
Canada — 0.5%
Silver Wheaton Corp.		96,200		2,004,513
Cayman Islands — 2.8%
Baidu, Inc. Sponsored ADR (a)		20,070		3,462,477
Cheung Kong Property Holdings Ltd.		367,254		2,479,432
CK Hutchison Holdings Ltd.		372,254		4,578,822
				10,520,731
China — 3.3%
China Life Insurance Co. Ltd. Class H		1,251,000		3,845,582
China Telecom Corp. Ltd. Class H		11,037,643		5,352,793
CRRC Corp. Ltd. Class H		371,300		360,641
Sinopharm Group Co. Ltd. Class H		568,800		2,636,597
				12,195,613
France — 10.4%
AXA SA		216,747		5,608,950
BNP Paribas SA		114,450		7,623,343
Cie de Saint-Gobain		96,920		4,983,655
Cie Generale des Etablissements Michelin		33,060		4,019,451
Credit Agricole SA		208,930		2,835,858
Sanofi		76,358		6,908,607
Total SA		95,472		4,823,144
Zodiac Aerospace		73,100		1,829,689
				38,632,697
Germany — 13.2%
Bayer AG		55,810		6,433,194
Deutsche Boerse AG (a)		20,980		1,922,808
Deutsche Lufthansa AG Registered		128,000		2,075,566
Deutsche Post AG Registered		66,911		2,290,736
HeidelbergCement AG		48,930		4,580,942
Infineon Technologies AG		273,297		5,580,424
Innogy SE (a) (b)		107,200		4,046,662
LANXESS AG		75,100		5,040,411
Merck KGaA		50,900		5,797,135
METRO AG		57,630		1,843,179
MorphoSys AG (a)		20,350		1,193,863
SAP SE Sponsored ADR (c)		29,468		2,892,873
Siemens AG		37,896		5,191,190
				48,888,983

	Number of Shares		Value
Hong Kong — 2.0%
AIA Group Ltd.		485,200	$	3,058,305
China Mobile Ltd.		382,500		4,207,399
				7,265,704
Ireland — 1.5%
CRH PLC		160,802		5,668,202
Israel — 1.5%
Teva Pharmaceutical Industries Ltd. Sponsored ADR		171,799		5,513,030
Italy — 1.6%
Eni SpA		371,293		6,085,389
Japan — 10.5%
IHI Corp. (a)		607,000		1,919,932
Inpex Corp.		304,100		3,000,024
Konica Minolta, Inc.		446,100		4,003,191
Nissan Motor Co. Ltd.		517,770		5,005,365
Omron Corp.		104,800		4,611,105
Panasonic Corp.		330,300		3,743,449
SoftBank Group Corp.		83,700		5,928,125
Sumitomo Metal Mining Co. Ltd.		226,000		3,218,434
Sumitomo Rubber Industries Ltd.		121,700		2,080,783
Suntory Beverage & Food Ltd.		129,100		5,445,455
				38,955,863
Netherlands — 5.1%
Akzo Nobel NV		67,830		5,621,625
ING Groep NV		378,890		5,724,406
NN Group NV		63,590		2,068,244
QIAGEN NV (a)		81,562		2,367,551
SBM Offshore NV		191,128		3,138,273
				18,920,099
Norway — 1.9%
Telenor ASA		316,016		5,260,591
Yara International ASA		47,510		1,829,597
				7,090,188
Portugal — 1.0%
Galp Energia SGPS SA		242,320		3,680,582
Republic of Korea — 6.3%
Hana Financial Group, Inc.		79,353		2,622,203
Hyundai Mobis Co. Ltd.		18,195		3,914,740
Hyundai Motor Co.		14,936		2,102,989
KB Financial Group, Inc. Sponsored ADR (a)		80,916		3,557,877
Samsung Electronics Co. Ltd.		6,018		11,083,597
				23,281,406
Singapore — 3.7%
DBS Group Holdings, Ltd.		385,379		5,348,367
Singapore Telecommunications Ltd.		340,700		952,331
Singapore Telecommunications Ltd.		1,468,000		4,115,741

The accompanying notes are an integral part of the portfolio of investments.

21

MML Foreign Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
United Overseas Bank Ltd.		201,500	$	3,187,189
				13,603,628
Spain — 1.3%
Telefonica SA Sponsored ADR		432,139		4,835,635
Sweden — 0.6%
Getinge AB Class B (c)		128,140		2,249,381
Switzerland — 6.0%
ABB Ltd. Registered		99,000		2,315,390
Novartis AG Registered		54,480		4,044,704
Roche Holding AG		31,790		8,109,800
Swiss Re AG		40,730		3,657,833
UBS Group AG Registered		257,960		4,128,675
				22,256,402
Taiwan — 1.1%
Taiwan Semiconductor Manufacturing Co. Ltd.		641,275		4,024,272
Thailand — 1.2%
Bangkok Bank PCL Foreign Registered		792,100		4,287,347
United Kingdom — 20.3%
Aviva PLC		657,655		4,383,851
BAE Systems PLC		633,010		5,101,721
Barclays PLC		1,857,820		5,236,724
BP PLC		1,648,784		9,468,198
GlaxoSmithKline PLC		251,884		5,239,641
Glencore PLC (a)		450,940		1,772,685
HSBC Holdings PLC		781,600		6,367,507
Johnson Matthey PLC		72,350		2,794,711
Kingfisher PLC		789,544		3,227,472
LivaNova PLC (a)		50,930		2,496,079
Petrofac Ltd.		190,850		2,199,896
Royal Dutch Shell PLC Class A		2,397		63,046
Royal Dutch Shell PLC Class B		351,154		9,647,854
Sky PLC		398,860		4,875,178
Standard Chartered PLC (a)		553,782		5,299,843
Tesco PLC (a)		791,310		1,840,544
Vodafone Group PLC Sponsored ADR		207,868		5,493,951
				75,508,901
TOTAL COMMON STOCK (Cost $331,772,472)				358,913,601
TOTAL EQUITIES (Cost $331,772,472)				358,913,601

	Number of Shares		Value
MUTUAL FUNDS — 1.4%
United States — 1.4%
State Street Navigator Securities Lending Prime Portfolio (d)		5,133,274	$	5,133,274
TOTAL MUTUAL FUNDS (Cost $5,133,274)				5,133,274
TOTAL LONG-TERM INVESTMENTS (Cost $336,905,746)				364,046,875
	Principal Amount
SHORT-TERM INVESTMENTS — 3.3%
Repurchase Agreement — 3.3%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (e)	$	12,374,173		12,374,173
TOTAL SHORT-TERM INVESTMENTS (Cost $12,374,173)				12,374,173
TOTAL INVESTMENTS —101.4% (Cost $349,279,919) (f)				376,421,048
Other Assets/(Liabilities) — (1.4)%				(5,271,459	)
NET ASSETS — 100.0%			$	371,149,589

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Securities exempt from registration under rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At March 31, 2017, these securities amounted to a value of $4,046,662 or 1.09% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2017, was $4,966,024 or 1.34% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

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

(e) Maturity value of $12,374,224. Collateralized by U.S. Government Agency obligations with a rate of 2.125%, maturity date of 9/30/21, and an aggregate market value, including accrued interest, of $12,623,866.

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

The accompanying notes are an integral part of the portfolio of investments.

22

MML Fundamental Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 100.0%
COMMON STOCK — 100.0%
Basic Materials — 2.4%
Iron & Steel — 1.2%
Cliffs Natural Resources, Inc. (a)		80,611	$	661,816
Nucor Corp.		23,544		1,406,048
				2,067,864
Mining — 1.2%
Rio Tinto PLC Sponsored ADR (United Kingdom)		47,373		1,927,134
				3,994,998
Communications — 23.1%
Internet — 18.0%
Alibaba Group Holding Ltd. Sponsored ADR (Cayman Islands) (a)		14,264		1,538,087
Alphabet, Inc. Class C (a)		11,117		9,222,219
Amazon.com, Inc. (a)		4,873		4,320,109
eBay, Inc. (a)		62,778		2,107,457
F5 Networks, Inc. (a)		11,773		1,678,477
Facebook, Inc. Class A (a)		40,930		5,814,107
Netflix, Inc. (a)		6,770		1,000,674
The Priceline Group, Inc. (a)		1,529		2,721,574
Snap, Inc. Class A (a)		7,300		164,469
Yandex NV Class A (a)		47,782		1,047,859
				29,615,032
Media — 4.2%
Comcast Corp. Class A		83,750		3,148,163
Discovery Communications, Inc. Class A (a)		31,149		906,124
FactSet Research Systems, Inc.		3,088		509,242
Scripps Networks Interactive Class A		16,259		1,274,218
Viacom, Inc. Class B		22,715		1,058,973
				6,896,720
Telecommunications — 0.9%
Cisco Systems, Inc.		46,464		1,570,483
				38,082,235
Consumer, Cyclical — 4.0%
Lodging — 0.6%
Las Vegas Sands Corp.		18,306		1,044,724
Retail — 3.4%
The Home Depot, Inc.		22,441		3,295,012
Ross Stores, Inc.		14,758		972,109
The TJX Cos., Inc.		15,795		1,249,069
				5,516,190
				6,560,914
Consumer, Non-cyclical — 20.2%
Beverages — 1.7%
PepsiCo, Inc.		25,782		2,883,975

	Number of Shares		Value
Biotechnology — 3.8%
Amgen, Inc.		20,516	$	3,366,060
Celgene Corp. (a)		8,730		1,086,274
Gilead Sciences, Inc.		27,039		1,836,489
				6,288,823
Commercial Services — 5.0%
Experian PLC		40,890		834,674
Gartner, Inc. (a)		9,235		997,288
Global Payments, Inc.		12,805		1,033,107
IHS Markit Ltd. (a)		41,135		1,725,613
PayPal Holdings, Inc. (a)		48,800		2,099,376
Vantiv, Inc. Class A (a)		23,758		1,523,363
				8,213,421
Health Care – Products — 1.5%
C.R. Bard, Inc.		2,579		640,985
Danaher Corp.		8,876		759,164
Medtronic PLC		4,411		355,350
Varian Medical Systems, Inc. (a)		6,957		633,991
				2,389,490
Health Care – Services — 3.1%
Aetna, Inc.		15,242		1,944,117
Anthem, Inc.		9,239		1,527,946
HCA Holdings, Inc. (a)		10,563		940,001
ICON PLC (a)		9,718		774,719
				5,186,783
Pharmaceuticals — 5.1%
Allergan PLC		7,570		1,808,625
Bristol-Myers Squibb Co.		39,058		2,123,974
Cardinal Health, Inc.		17,284		1,409,510
Johnson & Johnson		13,791		1,717,669
Merck & Co., Inc.		20,943		1,330,718
				8,390,496
				33,352,988
Energy — 4.8%
Oil & Gas — 2.8%
BP PLC Sponsored ADR (United Kingdom)		42,830		1,478,492
Chevron Corp.		13,640		1,464,527
Pioneer Natural Resources Co.		8,867		1,651,301
				4,594,320
Oil & Gas Services — 2.0%
Baker Hughes, Inc.		26,255		1,570,574
Schlumberger Ltd.		21,791		1,701,877
				3,272,451
				7,866,771
Financial — 11.1%
Banks — 2.9%
Bank of America Corp.		79,699		1,880,099
Citigroup, Inc.		24,364		1,457,455

The accompanying notes are an integral part of the portfolio of investments.

23

MML Fundamental Growth Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
JP Morgan Chase & Co.		16,930	$	1,487,131
				4,824,685
Diversified Financial Services — 6.6%
Alliance Data Systems Corp.		5,677		1,413,573
American Express Co.		19,755		1,562,818
Intercontinental Exchange, Inc.		29,093		1,741,798
Mastercard, Inc. Class A		23,806		2,677,461
Visa, Inc. Class A		39,191		3,482,904
				10,878,554
Insurance — 1.6%
American International Group, Inc.		26,260		1,639,412
MetLife, Inc.		19,237		1,016,098
				2,655,510
				18,358,749
Industrial — 7.0%
Electrical Components & Equipment — 0.5%
Emerson Electric Co.		14,179		848,755
Electronics — 1.5%
Fortive Corp.		13,262		798,638
Honeywell International, Inc.		13,237		1,652,904
				2,451,542
Machinery – Construction & Mining — 0.8%
Caterpillar, Inc.		14,185		1,315,800
Machinery – Diversified — 1.8%
Cummins, Inc.		10,274		1,553,429
Rockwell Automation, Inc.		8,717		1,357,324
				2,910,753
Miscellaneous – Manufacturing — 1.7%
Dover Corp.		14,014		1,126,025
Parker-Hannifin Corp.		10,673		1,711,095
				2,837,120
Transportation — 0.7%
C.H. Robinson Worldwide, Inc.		14,741		1,139,332
				11,503,302
Technology — 27.4%
Computers — 9.6%
Amdocs Ltd.		11,807		720,109
Apple, Inc.		83,016		11,926,078
Check Point Software Technologies Ltd. (a)		24,229		2,487,349
NetApp, Inc.		14,602		611,094
				15,744,630
Semiconductors — 6.3%
Analog Devices, Inc.		10,758		881,618
Applied Materials, Inc.		38,626		1,502,551
Cirrus Logic, Inc. (a)		9,788		594,034
Maxim Integrated Products, Inc.		46,521		2,091,584
QUALCOMM, Inc.		30,106		1,726,278
Texas Instruments, Inc.		30,819		2,482,779

	Number of Shares		Value
Xilinx, Inc.		19,117	$	1,106,683
				10,385,527
Software — 11.5%
Electronic Arts, Inc. (a)		16,493		1,476,453
Fiserv, Inc. (a)		7,739		892,384
Intuit, Inc.		6,018		698,028
Jack Henry & Associates, Inc.		9,311		866,854
Microsoft Corp.		139,657		9,197,810
Oracle Corp.		92,783		4,139,050
Paychex, Inc.		17,356		1,022,269
SS&C Technologies Holdings, Inc		20,633		730,408
				19,023,256
				45,153,413
TOTAL COMMON STOCK (Cost $135,032,997)				164,873,370
TOTAL EQUITIES (Cost $135,032,997)				164,873,370
TOTAL LONG-TERM INVESTMENTS (Cost $135,032,997)				164,873,370
	Principal Amount
SHORT-TERM INVESTMENTS — 0.2%
Repurchase Agreement — 0.2%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	376,264		376,264
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		26,007		26,007
TOTAL SHORT-TERM INVESTMENTS (Cost $402,271)				402,271
TOTAL INVESTMENTS — 100.2% (Cost $135,435,268) (c)				165,275,641
Other Assets/(Liabilities) — (0.2)%				(355,735	)
NET ASSETS — 100.0%			$	164,919,906

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Maturity value of $376,266. Collateralized by U.S. Government Agency obligations with a rate of 1.625%, maturity date of 4/30/19, and an aggregate market value, including accrued interest, of $385,033.

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

The accompanying notes are an integral part of the portfolio of investments.

24

MML Fundamental Value Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.0%
COMMON STOCK — 99.0%
Basic Materials — 2.3%
Chemicals — 1.4%
The Dow Chemical Co.		48,730	$	3,096,303
Forest Products & Paper — 0.9%
International Paper Co.		36,620		1,859,564
				4,955,867
Communications — 9.8%
Internet — 0.5%
eBay, Inc. (a)		35,970		1,207,513
Media — 4.2%
CBS Corp. Class B		33,000		2,288,880
Comcast Corp. Class A		62,280		2,341,105
Thomson Reuters Corp.		47,310		2,045,211
Viacom, Inc. Class B		49,880		2,325,406
				9,000,602
Telecommunications — 5.1%
Cisco Systems, Inc.		193,050		6,525,090
Nokia OYJ Sponsored ADR (Finland)		309,580		1,677,924
Verizon Communications, Inc.		55,760		2,718,300
				10,921,314
				21,129,429
Consumer, Cyclical — 6.1%
Home Builders — 1.2%
PulteGroup, Inc.		109,500		2,578,725
Leisure Time — 1.0%
Norwegian Cruise Line Holdings Ltd. (a)		44,090		2,236,686
Lodging — 1.2%
Hilton Worldwide Holdings, Inc.		42,220		2,468,181
Retail — 2.7%
The Home Depot, Inc.		13,390		1,966,054
Liberty Interactive Corp. QVC Group Class A (a)		76,800		1,537,536
Lowe’s Cos., Inc.		14,520		1,193,689
Signet Jewelers Ltd.		15,470		1,071,607
				5,768,886
				13,052,478
Consumer, Non-cyclical — 18.0%
Agriculture — 3.1%
British American Tobacco PLC		44,383		2,942,145
Philip Morris International, Inc.		32,680		3,689,572
				6,631,717
Biotechnology — 1.0%
Amgen, Inc.		13,330		2,187,053

	Number of Shares		Value
Commercial Services — 0.8%
Nielsen Holdings PLC		41,230	$	1,703,211
Cosmetics & Personal Care — 0.5%
Unilever NV NY Shares		21,000		1,043,280
Foods — 1.8%
The Kraft Heinz Co.		19,716		1,790,410
Mondelez International, Inc. Class A		49,590		2,136,337
				3,926,747
Health Care – Products — 1.5%
Medtronic PLC		41,139		3,314,158
Health Care – Services — 1.4%
UnitedHealth Group, Inc.		18,390		3,016,144
Pharmaceuticals — 7.9%
Allergan PLC		10,720		2,561,223
AstraZeneca PLC Sponsored ADR (United Kingdom)		70,390		2,191,945
Bristol-Myers Squibb Co.		52,590		2,859,844
Merck & Co., Inc.		89,550		5,690,007
Pfizer, Inc.		31,439		1,075,528
Roche Holding AG		9,882		2,520,951
				16,899,498
				38,721,808
Energy — 10.9%
Oil & Gas — 9.5%
Anadarko Petroleum Corp.		18,760		1,163,120
Canadian Natural Resources Ltd.		48,600		1,593,594
Chevron Corp.		44,850		4,815,544
EOG Resources, Inc.		32,600		3,180,130
Exxon Mobil Corp.		35,910		2,944,979
Marathon Oil Corp.		147,304		2,327,403
Occidental Petroleum Corp.		19,370		1,227,283
Pioneer Natural Resources Co.		12,690		2,363,259
Southwestern Energy Co. (a)		90,050		735,709
				20,351,021
Oil & Gas Services — 1.4%
Halliburton Co.		60,620		2,983,110
				23,334,131
Financial — 28.5%
Banks — 17.4%
Bank of America Corp.		106,060		2,501,955
Citigroup, Inc.		92,380		5,526,172
The Goldman Sachs Group, Inc.		11,740		2,696,913
JP Morgan Chase & Co.		116,500		10,233,360
M&T Bank Corp.		18,650		2,885,714
The PNC Financial Services Group, Inc.		46,470		5,587,553
Wells Fargo & Co.		143,610		7,993,333
				37,425,000

The accompanying notes are an integral part of the portfolio of investments.

25

MML Fundamental Value Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Diversified Financial Services — 3.6%
BlackRock, Inc.		7,680	$	2,945,357
Intercontinental Exchange, Inc.		36,010		2,155,919
Invesco Ltd.		81,090		2,483,786
				7,585,062
Insurance — 6.5%
American International Group, Inc.		34,540		2,156,332
Chubb Ltd.		26,715		3,639,919
Marsh & McLennan Cos., Inc.		36,750		2,715,458
MetLife, Inc.		48,410		2,557,016
Principal Financial Group, Inc.		29,970		1,891,407
Unum Group		22,070		1,034,862
				13,994,994
Real Estate Investment Trusts (REITS) — 1.0%
Park Hotels & Resorts, Inc.		86,230		2,213,524
				61,218,580
Industrial — 11.3%
Aerospace & Defense — 1.9%
Triumph Group, Inc.		40,170		1,034,377
United Technologies Corp.		27,560		3,092,508
				4,126,885
Building Materials — 1.1%
Fortune Brands Home & Security, Inc.		38,380		2,335,423
Machinery – Construction & Mining — 0.9%
Caterpillar, Inc.		20,220		1,875,607
Miscellaneous – Manufacturing — 6.1%
3M Co.		13,560		2,594,435
Eaton Corp. PLC		48,340		3,584,411
General Electric Co.		126,750		3,777,150
Ingersoll-Rand PLC		39,080		3,177,985
				13,133,981
Transportation — 1.3%
Union Pacific Corp.		25,490		2,699,901
				24,171,797
Technology — 8.6%
Computers — 2.0%
Apple, Inc.		12,230		1,756,962
Cognizant Technology Solutions Corp. Class A (a)		41,580		2,474,842
				4,231,804
Semiconductors — 5.5%
Analog Devices, Inc.		16,930		1,387,414
Intel Corp.		121,260		4,373,848
Maxim Integrated Products, Inc.		68,920		3,098,643
QUALCOMM, Inc.		52,430		3,006,336
				11,866,241

	Number of Shares		Value
Software — 1.1%
Microsoft Corp.		36,400	$	2,397,304
				18,495,349
Utilities — 3.5%
Electric — 3.5%
Dominion Resources, Inc.		18,180		1,410,223
Edison International		26,730		2,127,975
Eversource Energy		45,850		2,695,063
NextEra Energy, Inc.		10,720		1,376,126
				7,609,387
TOTAL COMMON STOCK (Cost $163,206,721)				212,688,826
TOTAL EQUITIES (Cost $163,206,721)				212,688,826
TOTAL LONG-TERM INVESTMENTS (Cost $163,206,721)				212,688,826
	Principal Amount
SHORT-TERM INVESTMENTS — 1.3%
Repurchase Agreement — 1.3%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	2,850,757		2,850,757
TOTAL SHORT-TERM INVESTMENTS (Cost $2,850,757)				2,850,757
TOTAL INVESTMENTS — 100.3% (Cost $166,057,478) (c)				215,539,583
Other Assets/(Liabilities) — (0.3)%				(730,418	)
NET ASSETS — 100.0%			$	214,809,165

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Maturity value of $2,850,769. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 5/15/18, and an aggregate market value, including accrued interest, of $2,911,841.

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

The accompanying notes are an integral part of the portfolio of investments.

26

MML Global Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.1%
COMMON STOCK — 99.1%
Austria — 0.4%
Erste Group Bank AG		33,164	$	1,080,060
Brazil — 0.6%
Ambev SA		243,831		1,420,647
Canada — 1.8%
Canadian National Railway Co.		59,314		4,385,084
Cayman Islands — 0.2%
Sands China Ltd.		114,000		527,638
Czech Republic — 0.1%
Komercni banka as		8,605		319,401
Denmark — 1.1%
Brenntag AG		14,951		838,550
Carlsberg A/S Class B		21,662		1,998,746
				2,837,296
France — 7.9%
Air Liquide SA		11,606		1,326,133
Danone SA		59,784		4,068,312
Hermes International		1,066		505,050
Legrand SA		32,788		1,978,332
LVMH Moet Hennessy Louis Vuitton SE (a)		20,850		4,584,481
Pernod Ricard SA		37,869		4,482,073
Schneider Electric SE		40,094		2,938,637
				19,883,018
Germany — 6.1%
Bayer AG		56,909		6,559,875
Deutsche Boerse AG (b)		15,700		1,438,899
Linde AG		18,281		3,042,934
Merck KGaA		19,377		2,206,897
MTU Aero Engines AG		15,927		2,072,043
				15,320,648
Ireland — 4.6%
Accenture PLC Class A		45,507		5,455,379
Medtronic PLC		74,041		5,964,743
				11,420,122
Israel — 1.0%
Check Point Software Technologies Ltd. (b)		25,548		2,622,758
Japan — 1.2%
Hoya Corp.		33,000		1,591,945
Kubota Corp.		96,500		1,452,524
				3,044,469
Mexico — 0.3%
Grupo Financiero Banorte SAB de CV Class O		148,264		853,207

	Number of Shares		Value
Netherlands — 3.0%
Akzo Nobel NV		37,157	$	3,079,504
Heineken NV		27,238		2,317,960
Schlumberger Ltd.		27,373		2,137,831
				7,535,295
Republic of Korea — 0.9%
Samsung Electronics Co. Ltd.		1,202		2,213,773
Spain — 0.7%
Aena SA (c)		10,572		1,672,648
Sweden — 2.1%
Svenska Cellulosa AB Class B (a)		159,628		5,152,296
Switzerland — 8.8%
Adecco Group AG		26,270		1,866,164
Cie Financiere Richemont SA		32,854		2,593,259
Julius Baer Group Ltd.		27,027		1,349,276
Nestle SA		82,703		6,344,399
Roche Holding AG		17,437		4,448,272
Sonova Holding AG Registered		9,704		1,346,477
Swiss Re AG		7,665		688,370
UBS Group AG Registered		217,895		3,487,431
				22,123,648
Thailand — 0.2%
Kasikornbank PCL		101,200		556,937
United Kingdom — 9.8%
Burberry Group PLC		73,901		1,599,566
Compass Group PLC		146,289		2,756,306
Delphi Automotive PLC		19,226		1,547,501
Diageo PLC		175,727		5,033,705
Reckitt Benckiser Group PLC		58,224		5,306,498
Sky PLC		130,129		1,590,538
Standard Chartered PLC (b)		28,950		277,059
Whitbread PLC		30,564		1,515,685
WPP PLC		220,103		4,831,861
				24,458,719
United States — 48.3%
3M Co.		22,374		4,280,817
Abbott Laboratories		56,683		2,517,292
American Express Co.		43,944		3,476,410
Amphenol Corp. Class A		22,617		1,609,652
AutoZone, Inc. (b)		2,309		1,669,523
The Bank of New York Mellon Corp.		87,310		4,123,651
Charter Communications, Inc. Class A (b)		5,279		1,727,922
Cisco Systems, Inc.		55,804		1,886,175
Cognizant Technology Solutions Corp. Class A (b)		29,061		1,729,711
Colgate-Palmolive Co.		45,162		3,305,407
The Cooper Cos., Inc.		13,824		2,763,279

The accompanying notes are an integral part of the portfolio of investments.

27

MML Global Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Coty, Inc. Class A		195,859	$	3,550,924
DENTSPLY SIRONA, Inc.		18,597		1,161,197
eBay, Inc. (b)		64,736		2,173,188
Franklin Resources, Inc.		56,001		2,359,882
The Goldman Sachs Group, Inc.		11,915		2,737,114
Harley-Davidson, Inc.		22,573		1,365,667
Honeywell International, Inc.		48,928		6,109,639
International Flavors & Fragrances, Inc.		2,963		392,686
Johnson & Johnson		8,605		1,071,753
Kansas City Southern		17,317		1,485,106
Kellogg Co.		41,438		3,008,813
Marriott International, Inc. Class A		10,208		961,389
Microchip Technology, Inc.		21,136		1,559,414
Monsanto Co.		24,908		2,819,586
National Oilwell Varco, Inc.		21,542		863,619
NOW, Inc. (b)		12,593		213,577
Omnicom Group, Inc.		20,716		1,785,926
Oracle Corp.		89,590		3,996,610
PayPal Holdings, Inc. (b)		29,814		1,282,598
Praxair, Inc.		14,074		1,669,176
Sally Beauty Holdings, Inc. (b)		55,246		1,129,228
State Street Corp.		59,477		4,734,964
Stryker Corp.		39,200		5,160,680
Thermo Fisher Scientific, Inc.		45,635		7,009,536
Time Warner, Inc.		56,764		5,546,411
United Parcel Service, Inc. Class B		35,646		3,824,816
United Technologies Corp.		24,040		2,697,528
Urban Outfitters, Inc. (b)		38,460		913,810
Visa, Inc. Class A		61,305		5,448,175
W.W. Grainger, Inc.		5,236		1,218,731
The Walt Disney Co.		51,023		5,785,498
Waters Corp. (b)		14,163		2,213,819
Wynn Resorts Ltd.		4,606		527,894
Zimmer Biomet Holdings, Inc.		43,274		5,284,188
				121,152,981
TOTAL COMMON STOCK (Cost $205,022,240)				248,580,645
TOTAL EQUITIES (Cost $205,022,240)				248,580,645
MUTUAL FUNDS — 1.9%
United States — 1.9%
State Street Navigator Securities Lending Prime Portfolio (d)		4,829,717		4,829,717
TOTAL MUTUAL FUNDS (Cost $4,829,717)				4,829,717
TOTAL LONG-TERM INVESTMENTS (Cost $209,851,957)				253,410,362

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 0.9%
Repurchase Agreement — 0.9%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (e)	$	2,233,647	$	2,233,647
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		18,864		18,864
TOTAL SHORT-TERM INVESTMENTS (Cost $2,252,511)				2,252,511
TOTAL INVESTMENTS — 101.9% (Cost $212,104,468) (f)				255,662,873
Other Assets/(Liabilities) — (1.9)%				(4,845,401	)
NET ASSETS — 100.0%			$	250,817,472

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, 2017, was $4,599,366 or 1.83% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

(b) Non-income producing security.

(c) Securities exempt from registration under rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At March 31, 2017, these securities amounted to a value of $1,672,648 or 0.67% of net assets.

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

(e) Maturity value of $2,233,656. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $2,278,495.

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

The accompanying notes are an integral part of the portfolio of investments.

28

MML Growth Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 74.9%
MML Blue Chip Growth Fund, Initial Class (a)		5,297,999	$	81,695,141
MML Equity Income Fund, Initial Class (a)		5,820,333		70,891,655
MML Equity Index Fund, Class III (a)		2,780,214		78,151,829
MML Focused Equity Fund, Class II (a)		3,069,929		43,378,091
MML Foreign Fund, Initial Class (a)		7,131,964		72,104,154
MML Fundamental Growth Fund, Class II (a)		4,483,218		55,771,228
MML Fundamental Value Fund, Class II (a)		4,873,869		74,521,455
MML Global Fund, Class I (a)		6,507,316		81,081,162
MML Income & Growth Fund, Initial Class (a)		5,766,117		70,577,270
MML International Equity Fund, Class II (a)		6,342,457		65,010,188
MML Large Cap Growth Fund, Initial Class (a)		2,436,543		28,190,797
MML Mid Cap Growth Fund, Initial Class (a)		4,777,097		74,188,309
MML Mid Cap Value Fund, Initial Class (a)		5,938,341		72,388,382
MML Small Cap Growth Equity Fund, Initial Class (a)		1,318,874		17,748,992
MML Small Company Value Fund, Class II (a)		1,913,587		32,971,109
MML Small/Mid Cap Value Fund, Initial Class (a)		1,908,198		25,703,427
MML Strategic Emerging Markets Fund, Class II (a)		4,611,316		44,176,407
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares (a)		302,592		23,862,406
Oppenheimer Global Fund/VA, Non-Service Shares (a)		1,445,628		55,873,529
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares (a)		13,735,607		136,257,222
Oppenheimer International Growth Fund/VA, Non-Service Shares (a)		15,696,442		35,003,065
				1,239,545,818
Fixed Income Funds — 25.2%
MML Dynamic Bond Fund, Class II (a)		8,277,369		83,022,008

	Number of Shares		Value
MML High Yield Fund, Class II (a)		1,277,955	$	13,137,378
MML Inflation-Protected and Income Fund, Initial Class (a)		6,390,941		65,890,604
MML Managed Bond Fund, Initial Class (a)		10,491,026		129,954,568
MML Short-Duration Bond Fund, Class II (a)		4,825,273		47,384,179
MML Total Return Bond Fund, Class II (a)		7,531,689		77,952,979
				417,341,716
TOTAL MUTUAL FUNDS (Cost $1,601,346,507)				1,656,887,534
TOTAL LONG-TERM INVESTMENTS (Cost $1,601,346,507)				1,656,887,534
TOTAL INVESTMENTS — 100.1% (Cost $1,601,346,507) (b)				1,656,887,534
Other Assets/(Liabilities) — (0.1)%				(987,477	)
NET ASSETS — 100.0%			$	1,655,900,057

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer. See Note 4 for a summary of transactions in the investments of affiliated issuers.

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

The accompanying notes are an integral part of the portfolio of investments.

29

MML Growth & Income Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 99.4%
COMMON STOCK — 99.4%
Basic Materials — 3.8%
Chemicals — 3.8%
Monsanto Co.		20,328	$	2,301,129
PPG Industries, Inc.		11,345		1,192,133
The Sherwin-Williams Co.		5,004		1,552,191
				5,045,453
Communications — 11.6%
Advertising — 0.7%
The Interpublic Group of Cos., Inc.		34,570		849,385
Internet — 5.5%
Alphabet, Inc. Class A (a)		4,140		3,509,892
Alphabet, Inc. Class C (a)		3,323		2,756,628
Facebook, Inc. Class A (a)		6,736		956,849
				7,223,369
Media — 5.4%
Comcast Corp. Class A		78,326		2,944,274
Time Warner, Inc.		18,315		1,789,558
Twenty-First Century Fox, Inc. Class A		44,528		1,442,262
The Walt Disney Co.		8,535		967,784
				7,143,878
				15,216,632
Consumer, Cyclical — 8.2%
Apparel — 2.3%
LVMH Moet Hennessy Louis Vuitton SE		8,828		1,941,094
NIKE, Inc. Class B		18,617		1,037,525
				2,978,619
Food Services — 0.6%
Aramark		23,045		849,669
Housewares — 1.8%
Newell Brands, Inc.		51,568		2,432,463
Retail — 3.5%
AutoZone, Inc. (a)		860		621,823
Costco Wholesale Corp.		6,961		1,167,290
Ross Stores, Inc.		19,670		1,295,663
Starbucks Corp.		25,165		1,469,384
				4,554,160
				10,814,911
Consumer, Non-cyclical — 25.5%
Beverages — 2.1%
Diageo PLC		38,975		1,116,440
Pernod Ricard SA		14,069		1,665,169
				2,781,609

	Number of Shares		Value
Commercial Services — 0.4%
Gartner, Inc. (a)		4,472	$	482,931
Cosmetics & Personal Care — 2.5%
Colgate-Palmolive Co.		23,306		1,705,766
Coty, Inc. Class A		48,474		878,834
The Estee Lauder Cos., Inc. Class A		9,223		782,018
				3,366,618
Foods — 3.0%
Danone SA		23,829		1,621,567
Mondelez International, Inc. Class A		53,660		2,311,673
				3,933,240
Health Care – Products — 9.0%
Abbott Laboratories		31,382		1,393,675
Danaher Corp.		34,761		2,973,108
Medtronic PLC		28,693		2,311,508
Stryker Corp.		13,590		1,789,123
Thermo Fisher Scientific, Inc.		21,863		3,358,157
				11,825,571
Household Products & Wares — 0.6%
Kimberly-Clark Corp.		5,671		746,474
Pharmaceuticals — 7.9%
Allergan PLC		8,975		2,144,307
Eli Lilly & Co.		24,065		2,024,107
Johnson & Johnson		19,338		2,408,548
McKesson Corp.		8,287		1,228,631
Mead Johnson Nutrition Co.		12,928		1,151,626
Zoetis, Inc.		26,423		1,410,196
				10,367,415
				33,503,858
Energy — 4.5%
Oil & Gas — 1.6%
EOG Resources, Inc.		20,713		2,020,553
Oil & Gas Services — 2.0%
Schlumberger Ltd.		34,112		2,664,147
Pipelines — 0.9%
Enterprise Products Partners LP (b)		43,906		1,212,245
				5,896,945
Financial — 25.5%
Banks — 13.4%
Bank of America Corp.		203,319		4,796,295
The Goldman Sachs Group, Inc.		13,292		3,053,438
JP Morgan Chase & Co.		62,242		5,467,337
Morgan Stanley		38,237		1,638,073
US Bancorp		30,601		1,575,952
Wells Fargo & Co.		18,302		1,018,690
				17,549,785

The accompanying notes are an integral part of the portfolio of investments.

30

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

	Number of Shares		Value
Diversified Financial Services — 7.4%
BlackRock, Inc.		3,564	$	1,366,830
Mastercard, Inc. Class A		23,318		2,622,575
Nasdaq, Inc.		22,745		1,579,640
Visa, Inc. Class A		47,079		4,183,911
				9,752,956
Insurance — 1.2%
Chubb Ltd.		11,676		1,590,855
Private Equity — 0.8%
The Blackstone Group LP (b)		35,947		1,067,626
Real Estate Investment Trusts (REITS) — 2.7%
American Tower Corp.		29,174		3,545,808
				33,507,030
Industrial — 7.4%
Aerospace & Defense — 0.7%
United Technologies Corp.		8,190		919,000
Electrical Components & Equipment — 0.7%
AMETEK, Inc.		17,697		957,054
Electronics — 1.8%
Honeywell International, Inc.		18,912		2,361,541
Engineering & Construction — 0.6%
Fluor Corp.		15,787		830,712
Packaging & Containers — 1.6%
Crown Holdings, Inc. (a)		39,035		2,066,903
Transportation — 2.0%
Canadian National Railway Co.		35,044		2,590,803
				9,726,013
Technology — 12.3%
Computers — 6.1%
Accenture PLC Class A		22,107		2,650,187
Apple, Inc.		9,947		1,428,986
Cognizant Technology Solutions Corp. Class A (a)		44,174		2,629,237
Hewlett Packard Enterprise Co.		55,817		1,322,863
				8,031,273
Semiconductors — 3.6%
Broadcom Ltd.		15,008		3,286,151
Texas Instruments, Inc.		18,112		1,459,103
				4,745,254
Software — 2.6%
Adobe Systems, Inc. (a)		7,754		1,009,028
Fidelity National Information Services, Inc.		30,313		2,413,521
				3,422,549
				16,199,076

	Number of Shares		Value
Utilities — 0.6%
Electric — 0.6%
American Electric Power Co., Inc.		10,739	$	720,909
TOTAL COMMON STOCK (Cost $88,862,441)				130,630,827
TOTAL EQUITIES (Cost $88,862,441)				130,630,827
TOTAL LONG-TERM INVESTMENTS (Cost $88,862,441)				130,630,827
	Principal Amount
SHORT-TERM INVESTMENTS — 0.7%
Repurchase Agreement — 0.7%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (c)	$	938,123		938,123
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		9,219		9,219
TOTAL SHORT-TERM INVESTMENTS (Cost $947,342)				947,342
TOTAL INVESTMENTS — 100.1% (Cost $89,809,783) (d)				131,578,169
Other Assets/(Liabilities) — (0.1)%				(191,060	)
NET ASSETS — 100.0%			$	131,387,109

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Security is a Master Limited Partnership.

(c) Maturity value of $938,127. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $960,690.

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

The accompanying notes are an integral part of the portfolio of investments.

31

MML Income & Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 95.6%
COMMON STOCK — 95.6%
Basic Materials — 3.5%
Chemicals — 3.0%
The Dow Chemical Co.		108,980	$	6,924,589
E.I. du Pont de Nemours & Co.		10,420		837,039
Praxair, Inc.		6,290		745,994
				8,507,622
Forest Products & Paper — 0.5%
International Paper Co.		26,650		1,353,287
				9,860,909
Communications — 5.3%
Advertising — 0.6%
Publicis Groupe SA		22,580		1,578,019
Media — 1.9%
Comcast Corp. Class A		137,920		5,184,413
Telecommunications — 2.8%
BCE, Inc.		15,550		688,399
Motorola Solutions, Inc.		25,500		2,198,610
SK Telecom Co. Ltd. Sponsored ADR (South Korea)		61,000		1,535,980
Verizon Communications, Inc.		71,910		3,505,612
				7,928,601
				14,691,033
Consumer, Cyclical — 3.0%
Lodging — 0.5%
Hilton Grand Vacations, Inc. (a)		1,469		42,102
Hilton Worldwide Holdings, Inc.		20,646		1,206,965
				1,249,067
Retail — 2.5%
Dollar General Corp.		36,570		2,550,026
The Gap, Inc.		70,480		1,711,959
The Home Depot, Inc.		18,640		2,736,911
				6,998,896
				8,247,963
Consumer, Non-cyclical — 22.3%
Agriculture — 0.8%
Altria Group, Inc.		15,800		1,128,436
Philip Morris International, Inc.		10,470		1,182,063
				2,310,499
Beverages — 2.1%
The Coca-Cola Co.		68,100		2,890,164
Diageo PLC		101,690		2,912,913
				5,803,077
Commercial Services — 1.2%
Experian PLC		92,900		1,896,336

	Number of Shares		Value
Nielsen Holdings PLC		35,710	$	1,475,180
				3,371,516
Cosmetics & Personal Care — 2.2%
The Procter & Gamble Co.		31,390		2,820,392
Unilever NV NY Shares		64,340		3,196,411
				6,016,803
Foods — 1.5%
The Kroger Co.		105,910		3,123,286
Mondelez International, Inc. Class A		27,310		1,176,515
				4,299,801
Health Care – Products — 0.7%
Becton, Dickinson & Co.		10,010		1,836,234
Health Care – Services — 5.6%
Aetna, Inc.		38,422		4,900,726
Anthem, Inc.		35,620		5,890,836
Quest Diagnostics, Inc.		23,360		2,293,718
UnitedHealth Group, Inc.		15,353		2,518,046
				15,603,326
Pharmaceuticals — 8.2%
AstraZeneca PLC		72,351		4,446,611
Johnson & Johnson		12,360		1,539,438
McKesson Corp.		8,800		1,304,688
Merck & Co., Inc.		91,200		5,794,848
Pfizer, Inc.		284,850		9,744,718
				22,830,303
				62,071,559
Energy — 10.8%
Oil & Gas — 10.0%
Anadarko Petroleum Corp.		12,250		759,500
Chevron Corp.		36,188		3,885,506
Exxon Mobil Corp.		37,200		3,050,772
Hess Corp.		62,592		3,017,560
Marathon Oil Corp.		84,870		1,340,946
Marathon Petroleum Corp.		41,940		2,119,648
Occidental Petroleum Corp.		68,054		4,311,901
Royal Dutch Shell PLC A Shares Sponsored ADR (United Kingdom)		13,300		701,309
Suncor Energy, Inc.		136,100		4,185,075
Total SA Sponsored ADR (France)		90,573		4,566,691
				27,938,908
Oil & Gas Services — 0.4%
Schlumberger Ltd.		14,020		1,094,962
Pipelines — 0.4%
Enbridge, Inc.		28,479		1,191,561
				30,225,431

The accompanying notes are an integral part of the portfolio of investments.

32

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

	Number of Shares		Value
Financial — 27.1%
Banks — 19.8%
Bank of America Corp.		471,830	$	11,130,470
Citigroup, Inc.		141,390		8,457,950
The Goldman Sachs Group, Inc.		13,110		3,011,629
JP Morgan Chase & Co.		132,200		11,612,448
KeyCorp		80,770		1,436,091
Morgan Stanley		113,960		4,882,046
SunTrust Banks, Inc.		55,442		3,065,942
US Bancorp		77,270		3,979,405
Wells Fargo & Co.		138,080		7,685,533
				55,261,514
Diversified Financial Services — 0.8%
CME Group, Inc.		5,750		683,100
Invesco Ltd.		48,484		1,485,065
				2,168,165
Insurance — 6.1%
The Allstate Corp.		17,550		1,430,150
American International Group, Inc.		81,940		5,115,514
Marsh & McLennan Cos., Inc.		19,010		1,404,649
MetLife, Inc.		61,810		3,264,804
Prudential Financial, Inc.		37,690		4,020,769
The Travelers Cos., Inc.		15,340		1,849,084
				17,084,970
Real Estate Investment Trusts (REITS) — 0.4%
Weyerhaeuser Co.		33,030		1,122,359
				75,637,008
Industrial — 9.9%
Aerospace & Defense — 2.6%
Lockheed Martin Corp.		12,290		3,288,804
Northrop Grumman Corp.		16,320		3,881,549
				7,170,353
Electronics — 2.5%
Honeywell International, Inc.		28,450		3,552,551
Koninklijke Philips NV		102,640		3,299,336
				6,851,887
Machinery – Diversified — 0.3%
Rockwell Automation, Inc.		4,650		724,052
Miscellaneous – Manufacturing — 3.2%
3M Co.		10,010		1,915,213
General Electric Co.		224,840		6,700,232
Pentair PLC		7,240		454,527
				9,069,972
Transportation — 1.3%
Union Pacific Corp.		14,419		1,527,260
United Parcel Service, Inc. Class B		20,600		2,210,380
				3,737,640
				27,553,904

	Number of Shares		Value
Technology — 8.8%
Computers — 0.4%
Lenovo Group Ltd.		1,768,000	$	1,164,549
Semiconductors — 3.7%
QUALCOMM, Inc.		28,390		1,627,883
Samsung Electronics Co., Ltd. GDR (a) (b)		5,230		4,800,017
Taiwan Semiconductor Manufacturing Co. Ltd. Sponsored ADR (Taiwan)		114,700		3,766,748
				10,194,648
Software — 4.7%
Constellation Software, Inc.		389		191,158
Microsoft Corp.		94,060		6,194,792
Oracle Corp.		153,220		6,835,144
				13,221,094
				24,580,291
Utilities — 4.9%
Electric — 4.8%
Dominion Resources, Inc.		35,220		2,732,016
Exelon Corp.		50,100		1,802,598
FirstEnergy Corp.		43,460		1,382,897
NextEra Energy, Inc.		27,450		3,523,757
PG&E Corp.		25,620		1,700,143
Public Service Enterprise Group, Inc.		49,220		2,182,907
				13,324,318
Water — 0.1%
American Water Works Co., Inc.		4,760		370,185
				13,694,503
TOTAL COMMON STOCK (Cost $214,964,061)				266,562,601
TOTAL EQUITIES (Cost $214,964,061)				266,562,601
TOTAL LONG-TERM INVESTMENTS (Cost $214,964,061)				266,562,601
	Principal Amount
SHORT-TERM INVESTMENTS — 4.3%
Repurchase Agreement — 4.3%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (c)	$	11,898,539		11,898,539
TOTAL SHORT-TERM INVESTMENTS (Cost $11,898,539)				11,898,539

The accompanying notes are an integral part of the portfolio of investments.

33

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

	Principal Amount	Value
TOTAL INVESTMENTS — 99.9% (Cost $226,862,600) (d)		$	278,461,140
Other Assets/(Liabilities) — 0.1%			367,177
NET ASSETS — 100.0%		$	278,828,317

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

GDR Global Depositary Receipt

(a) Non-income producing security.

(b) Security exempt from registration under Regulation S of the Securities Act of 1933, which exempts from registration securities offered and sold outside the United States. Security may not be offered or sold in the United States except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act of 1933. At March 31, 2017, these securities amounted to a value of $4,800,017 or 1.72% of net assets.

(c) Maturity value of $11,898,589. Collateralized by U.S. Government Agency obligations with rates ranging from 2.000% - 2.125%, maturity dates ranging from 8/31/21 - 9/30/21, and an aggregate market value, including accrued interest, of $12,136,681.

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

The accompanying notes are an integral part of the portfolio of investments.

34

MML International Equity Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 95.8%
COMMON STOCK — 95.8%
Australia — 3.3%
AMP Ltd.		814,400	$	3,214,903
Orica Ltd.		173,324		2,329,115
				5,544,018
Cayman Islands — 2.9%
Baidu, Inc. Sponsored ADR (a)		17,925		3,092,421
Melco Crown Entertainment Ltd. ADR		89,200		1,653,768
				4,746,189
Denmark — 3.2%
Daimler AG		71,500		5,280,413
France — 15.7%
BNP Paribas SA		88,750		5,911,505
Bureau Veritas SA		137,000		2,890,197
Danone SA		46,475		3,162,632
Kering		6,885		1,782,440
LVMH Moet Hennessy Louis Vuitton SE		9,465		2,081,157
Pernod Ricard SA		17,490		2,070,069
Publicis Groupe SA		30,900		2,159,468
Safran SA		41,170		3,075,863
Sanofi		4,900		443,335
Valeo SA		36,110		2,408,210
				25,984,876
Germany — 7.2%
Allianz SE		30,780		5,701,629
Bayerische Motoren Werke AG		31,115		2,838,331
Continental AG		15,300		3,354,179
				11,894,139
India — 1.1%
Infosys Ltd. Sponsored ADR (b)		117,200		1,851,760
Indonesia — 1.9%
Bank Mandiri Persero Tbk PT		3,596,300		3,157,634
Ireland — 1.9%
Willis Towers Watson PLC		24,409		3,194,894
Israel — 0.1%
Check Point Software Technologies Ltd. (a)		1,400		143,724
Italy — 4.5%
Intesa Sanpaolo SpA		2,128,900		5,782,373
PRADA SpA		377,200		1,585,137
				7,367,510

	Number of Shares		Value
Japan — 7.5%
Daiwa Securities Group, Inc.		332,500	$	2,031,436
Honda Motor Co. Ltd.		122,700		3,707,526
Komatsu Ltd.		27,500		719,414
Olympus Corp.		37,700		1,453,201
Omron Corp.		21,600		950,380
Toyota Motor Corp.		64,100		3,488,305
				12,350,262
Mexico — 2.1%
Grupo Televisa SAB Sponsored ADR		136,100		3,530,434
Netherlands — 7.9%
Akzo Nobel NV		9,761		808,974
ASML Holding NV		6,970		924,500
CNH Industrial NV		534,300		5,152,756
EXOR NV		71,400		3,692,753
Koninklijke Philips NV		75,215		2,417,766
				12,996,749
Republic of Korea — 0.8%
Samsung Electronics Co. Ltd.		735		1,353,680
Sweden — 6.1%
Atlas Copco AB Class B		24,600		781,905
Hennes & Mauritz AB Class B		178,400		4,552,653
SKF AB Class B (b)		129,000		2,553,864
Volvo AB Class B (b)		146,500		2,156,896
				10,045,318
Switzerland — 11.1%
Cie Financiere Richemont SA		38,350		3,027,074
Credit Suisse Group AG		372,223		5,528,925
Kuehne & Nagel International AG		19,490		2,755,296
LafargeHolcim Ltd.		53,070		3,142,136
Nestle SA		17,870		1,370,862
The Swatch Group AG		7,240		2,587,753
				18,412,046
Taiwan — 0.3%
Taiwan Semiconductor Manufacturing Co. Ltd.		73,000		458,106
United Kingdom — 18.2%
Ashtead Group PLC		105,500		2,183,859
Diageo PLC		108,700		3,113,715
Experian PLC		87,600		1,788,149
G4S PLC		544,900		2,077,562
Glencore PLC (a)		1,647,200		6,475,288
Lloyds Banking Group PLC		6,952,000		5,784,141
Meggitt PLC		242,738		1,355,436
Royal Bank of Scotland Group PLC (a)		794,400		2,409,942
Schroders PLC		72,100		2,737,217
Smiths Group PLC		62,800		1,275,153

The accompanying notes are an integral part of the portfolio of investments.

35

MML International Equity Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Wolseley PLC		9,100	$	572,379
WPP PLC		11,900		261,237
				30,034,078
TOTAL COMMON STOCK (Cost $142,952,040)				158,345,830
TOTAL EQUITIES (Cost $142,952,040)				158,345,830
MUTUAL FUNDS — 2.1%
United States — 2.1%
State Street Navigator Securities Lending Prime Portfolio (c)		3,489,010		3,489,010
TOTAL MUTUAL FUNDS (Cost $3,489,010)				3,489,010
TOTAL LONG-TERM INVESTMENTS (Cost $146,441,050)				161,834,840
	Principal Amount
SHORT-TERM INVESTMENTS — 3.9%
Repurchase Agreement — 3.9%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (d)	$	6,542,610		6,542,610
TOTAL SHORT-TERM INVESTMENTS (Cost $6,542,610)				6,542,610
TOTAL INVESTMENTS — 101.8% (Cost $152,983,660) (e)				168,377,450
Other Assets/(Liabilities) — (1.8)%				(3,043,750	)
NET ASSETS — 100.0%			$	165,333,700

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(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, 2017, was $3,325,663 or 2.01% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

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

(d) Maturity value of $6,542,637. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 5/15/18, and an aggregate market value, including accrued interest, of $6,675,684.

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

The accompanying notes are an integral part of the portfolio of investments.

36

MML Large Cap Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.8%
COMMON STOCK — 98.8%
Communications — 32.4%
Internet — 25.4%
Alibaba Group Holding Ltd. Sponsored ADR (Cayman Islands) (a)		51,712	$	5,576,105
Alphabet, Inc. Class A (a)		3,828		3,245,378
Alphabet, Inc. Class C (a)		3,842		3,187,170
Amazon.com, Inc. (a)		9,352		8,290,922
Facebook, Inc. Class A (a)		54,048		7,677,518
				27,977,093
Media — 1.8%
FactSet Research Systems, Inc.		11,727		1,933,900
Telecommunications — 5.2%
Cisco Systems, Inc.		169,016		5,712,741
				35,623,734
Consumer, Cyclical — 2.8%
Retail — 2.8%
Yum China Holdings, Inc. (a)		43,898		1,194,026
Yum! Brands, Inc.		28,765		1,838,083
				3,032,109
Consumer, Non-cyclical — 27.3%
Beverages — 6.7%
The Coca-Cola Co.		78,208		3,319,147
Monster Beverage Corp. (a)		87,552		4,042,276
				7,361,423
Biotechnology — 4.8%
Amgen, Inc.		13,698		2,247,431
Regeneron Pharmaceuticals, Inc. (a)		7,743		3,000,490
				5,247,921
Commercial Services — 0.9%
Automatic Data Processing, Inc.		9,845		1,008,030
Cosmetics & Personal Care — 3.2%
The Procter & Gamble Co.		39,306		3,531,644
Foods — 3.2%
Danone SA Sponsored ADR (France)		253,818		3,474,768
Health Care – Products — 2.5%
Varex Imaging Corp. (a)		9,125		306,600
Varian Medical Systems, Inc. (a)		26,680		2,431,348
				2,737,948
Pharmaceuticals — 6.0%
Merck & Co., Inc.		23,509		1,493,762
Novartis AG Sponsored ADR (Switzerland)		28,951		2,150,191

	Number of Shares		Value
Novo Nordisk A/S Sponsored ADR (Denmark)		87,096	$	2,985,651
				6,629,604
				29,991,338
Energy — 2.2%
Oil & Gas Services — 2.2%
Schlumberger Ltd.		31,598		2,467,804
Financial — 9.4%
Diversified Financial Services — 9.4%
American Express Co.		20,510		1,622,546
SEI Investments Co.		60,953		3,074,469
Visa, Inc. Class A		63,673		5,658,620
				10,355,635
Industrial — 8.1%
Machinery – Diversified — 2.6%
Deere & Co.		25,921		2,821,760
Transportation — 5.5%
Expeditors International of Washington, Inc.		58,910		3,327,826
United Parcel Service, Inc. Class B		25,143		2,697,844
				6,025,670
				8,847,430
Technology — 16.6%
Semiconductors — 4.0%
Analog Devices, Inc.		6,641		544,230
QUALCOMM, Inc.		66,587		3,818,098
				4,362,328
Software — 12.6%
Autodesk, Inc. (a)		42,173		3,646,700
Cerner Corp. (a)		42,248		2,486,295
Microsoft Corp.		44,984		2,962,646
Oracle Corp.		108,220		4,827,694
				13,923,335
				18,285,663
TOTAL COMMON STOCK (Cost $92,599,971)				108,603,713
TOTAL EQUITIES (Cost $92,599,971)				108,603,713
TOTAL LONG-TERM INVESTMENTS (Cost $92,599,971)				108,603,713

The accompanying notes are an integral part of the portfolio of investments.

37

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

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 0.8%
Repurchase Agreement — 0.8%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	867,142	$	867,142
TOTAL SHORT-TERM INVESTMENTS (Cost $867,142)				867,142
TOTAL INVESTMENTS — 99.6% (Cost $93,467,113) (c)				109,470,855
Other Assets/(Liabilities) — 0.4%				458,142
NET ASSETS — 100.0%			$	109,928,997

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

(a) Non-income producing security.

(b) Maturity value of $867,145. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $885,243.

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

The accompanying notes are an integral part of the portfolio of investments.

38

MML Managed Volatility Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.5%
COMMON STOCK — 98.5%
Basic Materials — 2.3%
Chemicals — 1.9%
Air Products & Chemicals, Inc. (a)		1,934	$	261,651
Albemarle Corp. (a)		1,036		109,443
CF Industries Holdings, Inc. (a)		2,266		66,507
The Dow Chemical Co. (a)		10,094		641,373
E.I. du Pont de Nemours & Co. (a)		7,848		630,430
Eastman Chemical Co. (a)		1,353		109,322
FMC Corp. (a)		1,167		81,212
International Flavors & Fragrances, Inc. (a)		729		96,614
LyondellBasell Industries NV Class A (a)		2,970		270,834
Monsanto Co. (a)		3,932		445,103
The Mosaic Co. (a)		3,135		91,479
PPG Industries, Inc. (a)		2,399		252,087
Praxair, Inc. (a)		2,564		304,090
The Sherwin-Williams Co. (a)		718		222,717
				3,582,862
Forest Products & Paper — 0.1%
International Paper Co. (a)		3,622		183,925
Iron & Steel — 0.1%
Nucor Corp. (a)		2,904		173,427
Mining — 0.2%
Freeport-McMoRan, Inc. (a) (b)		12,012		160,480
Newmont Mining Corp. (a)		4,703		155,011
				315,491
				4,255,705
Communications — 13.6%
Advertising — 0.2%
The Interpublic Group of Cos., Inc. (a)		3,643		89,508
Omnicom Group, Inc. (a)		2,146		185,007
				274,515
Internet — 7.1%
Alphabet, Inc. Class A (a) (b)		2,678		2,270,408
Alphabet, Inc. Class C (a) (b)		2,674		2,218,243
Amazon.com, Inc. (a) (b)		3,570		3,164,948
eBay, Inc. (a) (b)		9,274		311,328
Expedia, Inc. (a)		1,107		139,670
F5 Networks, Inc. (a) (b)		617		87,966
Facebook, Inc. Class A (a) (b)		21,230		3,015,722
Netflix, Inc. (a) (b)		3,851		569,216
The Priceline Group, Inc. (a) (b)		444		790,307
Symantec Corp. (a)		5,664		173,772
TripAdvisor, Inc. (a) (b)		1,100		47,476
VeriSign, Inc. (a) (b)		849		73,956

	Number of Shares		Value
Yahoo!, Inc. (a) (b)		7,839	$	363,808
				13,226,820
Media — 3.0%
CBS Corp. Class B (a)		3,331		231,038
Charter Communications, Inc. Class A (a) (b)		1,941		635,328
Comcast Corp. Class A (a)		42,889		1,612,197
Discovery Communications, Inc. Class A (a) (b)		1,248		36,304
Discovery Communications, Inc. Class C (a) (b)		1,970		55,771
DISH Network Corp. Class A (a) (b)		1,984		125,964
News Corp. Class A (a)		3,310		43,030
News Corp. Class B (a)		798		10,773
Scripps Networks Interactive Class A (a)		856		67,085
TEGNA, Inc. (a)		1,890		48,422
Time Warner, Inc. (a)		6,970		681,039
Twenty-First Century Fox, Inc. Class A (a)		9,641		312,272
Twenty-First Century Fox, Inc. Class B (a)		4,242		134,811
Viacom, Inc. Class B (a)		3,051		142,238
The Walt Disney Co. (a)		13,183		1,494,820
				5,631,092
Telecommunications — 3.3%
AT&T, Inc. (a)		55,227		2,294,682
CenturyLink, Inc. (a)		5,076		119,641
Cisco Systems, Inc. (a)		45,320		1,531,816
Juniper Networks, Inc. (a)		3,405		94,761
Level 3 Communications, Inc. (a) (b)		2,561		146,541
Motorola Solutions, Inc. (a)		1,522		131,227
Verizon Communications, Inc. (a)		36,599		1,784,201
				6,102,869
				25,235,296
Consumer, Cyclical — 8.9%
Airlines — 0.6%
Alaska Air Group, Inc. (a)		1,103		101,719
American Airlines Group, Inc. (a)		4,706		199,064
Delta Air Lines, Inc. (a)		6,561		301,544
Southwest Airlines Co. (a)		5,491		295,196
United Continental Holdings, Inc. (a) (b)		2,618		184,935
				1,082,458
Apparel — 0.6%
Hanesbrands, Inc. (a)		3,430		71,207
Michael Kors Holdings Ltd. (a) (b)		1,589		60,557
NIKE, Inc. Class B (a)		12,026		670,209
Ralph Lauren Corp. (a)		558		45,544
Under Armour, Inc. Class A (a) (b)		1,616		31,964

The accompanying notes are an integral part of the portfolio of investments.

39

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Under Armour, Inc. Class C (a) (b)		1,787	$	32,702
VF Corp. (a)		2,835		155,840
				1,068,023
Auto Manufacturers — 0.6%
Ford Motor Co. (a)		34,831		405,433
General Motors Co. (a)		12,429		439,489
PACCAR, Inc. (a)		3,168		212,890
				1,057,812
Auto Parts & Equipment — 0.2%
BorgWarner, Inc. (a)		1,724		72,046
Delphi Automotive PLC (a)		2,476		199,293
The Goodyear Tire & Rubber Co. (a)		2,400		86,400
				357,739
Distribution & Wholesale — 0.2%
Fastenal Co. (a)		2,702		139,153
LKQ Corp. (a) (b)		2,888		84,532
W.W. Grainger, Inc. (a)		487		113,354
				337,039
Home Builders — 0.1%
D.R. Horton, Inc. (a)		3,021		100,630
Lennar Corp. Class A (a)		1,839		94,138
PulteGroup, Inc. (a)		2,802		65,987
				260,755
Home Furnishing — 0.1%
Leggett & Platt, Inc. (a)		1,226		61,692
Whirlpool Corp. (a)		680		116,505
				178,197
Housewares — 0.1%
Newell Brands, Inc. (a)		4,416		208,303
Leisure Time — 0.3%
Carnival Corp. (a)		3,856		227,157
Harley-Davidson, Inc. (a)		1,529		92,504
Royal Caribbean Cruises Ltd. (a)		1,483		145,497
				465,158
Lodging — 0.2%
Marriott International, Inc. Class A (a)		2,948		277,642
Wyndham Worldwide Corp. (a)		951		80,160
Wynn Resorts Ltd. (a)		708		81,144
				438,946
Retail — 5.7%
Advance Auto Parts, Inc. (a)		683		101,262
AutoNation, Inc. (a) (b)		470		19,876
AutoZone, Inc. (a) (b)		263		190,162
Bed Bath & Beyond, Inc. (a)		1,293		51,022
Best Buy Co., Inc. (a)		2,549		125,283
CarMax, Inc. (a) (b)		1,786		105,767
Chipotle Mexican Grill, Inc. (a) (b)		264		117,617
Coach, Inc. (a)		2,475		102,292

	Number of Shares		Value
Costco Wholesale Corp. (a)		3,947	$	661,872
CVS Health Corp. (a)		9,246		725,811
Darden Restaurants, Inc. (a)		1,057		88,439
Dollar General Corp. (a)		2,284		159,263
Dollar Tree, Inc. (a) (b)		2,140		167,904
Foot Locker, Inc. (a)		1,218		91,119
The Gap, Inc. (a)		2,014		48,920
Genuine Parts Co. (a)		1,344		124,199
The Home Depot, Inc. (a)		10,912		1,602,209
Kohl’s Corp. (a)		1,685		67,080
L Brands, Inc. (a)		2,216		104,374
Lowe’s Cos., Inc. (a)		7,791		640,498
Macy’s, Inc. (a)		2,865		84,919
McDonald’s Corp. (a)		7,514		973,890
Nordstrom, Inc. (a)		995		46,337
O’Reilly Automotive, Inc. (a) (b)		858		231,523
PVH Corp. (a)		700		72,429
Ross Stores, Inc. (a)		3,474		228,832
Signet Jewelers Ltd. (a)		663		45,926
Staples, Inc. (a)		6,307		55,312
Starbucks Corp. (a)		13,112		765,610
Target Corp. (a)		4,909		270,928
Tiffany & Co. (a)		978		93,203
The TJX Cos., Inc. (a)		5,811		459,534
Tractor Supply Co. (a)		1,181		81,454
Ulta Salon Cosmetics & Fragrance, Inc. (a) (b)		535		152,598
Wal-Mart Stores, Inc. (a)		13,505		973,440
Walgreens Boots Alliance, Inc. (a)		7,721		641,229
Yum! Brands, Inc. (a)		3,071		196,237
				10,668,370
Textiles — 0.1%
Mohawk Industries, Inc. (a) (b)		583		133,793
Toys, Games & Hobbies — 0.1%
Hasbro, Inc. (a)		961		95,927
Mattel, Inc. (a)		3,075		78,751
				174,678
				16,431,271
Consumer, Non-cyclical — 22.4%
Agriculture — 1.9%
Altria Group, Inc. (a)		17,681		1,262,777
Archer-Daniels-Midland Co. (a)		5,135		236,415
Philip Morris International, Inc. (a)		13,944		1,574,278
Reynolds American, Inc. (a)		7,437		468,680
				3,542,150
Beverages — 2.0%
Brown-Forman Corp. Class B (a)		1,590		73,426
The Coca-Cola Co. (a)		34,837		1,478,482
Constellation Brands, Inc. Class A (a)		1,603		259,798
Dr. Pepper Snapple Group, Inc. (a)		1,681		164,604
Molson Coors Brewing Co. Class B (a)		1,600		153,136

The accompanying notes are an integral part of the portfolio of investments.

40

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Monster Beverage Corp. (a) (b)		3,580	$	165,289
PepsiCo, Inc. (a)		12,893		1,442,211
				3,736,946
Biotechnology — 2.4%
Alexion Pharmaceuticals, Inc. (a) (b)		1,997		242,116
Amgen, Inc. (a)		6,722		1,102,879
Biogen, Inc. (a) (b)		1,953		533,989
Celgene Corp. (a) (b)		6,986		869,268
Gilead Sciences, Inc. (a)		11,896		807,976
Illumina, Inc. (a) (b)		1,306		222,856
Incyte Corp. (a) (b)		1,559		208,391
Regeneron Pharmaceuticals, Inc. (a) (b)		666		258,082
Vertex Pharmaceuticals, Inc. (a) (b)		2,266		247,787
				4,493,344
Commercial Services — 1.4%
Automatic Data Processing, Inc. (a)		4,030		412,632
Cintas Corp. (a)		788		99,713
Ecolab, Inc. (a)		2,332		292,293
Equifax, Inc. (a)		1,109		151,645
Global Payments, Inc. (a)		1,452		117,147
H&R Block, Inc. (a)		1,881		43,733
Moody’s Corp. (a)		1,541		172,654
Nielsen Holdings PLC (a)		2,973		122,815
PayPal Holdings, Inc. (a) (b)		10,057		432,652
Quanta Services, Inc. (a) (b)		1,344		49,876
Robert Half International, Inc. (a)		1,168		57,033
S&P Global, Inc. (a)		2,315		302,663
Total System Services, Inc. (a)		1,495		79,923
United Rentals, Inc. (a) (b)		735		91,912
Verisk Analytics, Inc. (a) (b)		1,422		115,381
The Western Union Co. (a)		4,272		86,935
				2,629,007
Cosmetics & Personal Care — 1.6%
Colgate-Palmolive Co. (a)		7,910		578,933
Coty, Inc. Class A (a)		4,449		80,660
The Estee Lauder Cos., Inc. Class A (a)		2,032		172,293
The Procter & Gamble Co. (a)		23,044		2,070,504
				2,902,390
Foods — 1.6%
Campbell Soup Co. (a)		1,783		102,059
Conagra Brands, Inc. (a)		3,747		151,154
General Mills, Inc. (a)		5,221		308,091
The Hershey Co. (a)		1,223		133,613
Hormel Foods Corp. (a)		2,458		85,120
The J.M. Smucker Co. (a)		1,059		138,814
Kellogg Co. (a)		2,337		169,690
The Kraft Heinz Co. (a)		5,380		488,558
The Kroger Co. (a)		8,346		246,123
McCormick & Co., Inc. (a)		1,071		104,476

	Number of Shares		Value
Mondelez International, Inc. Class A (a)		13,863	$	597,218
Sysco Corp. (a)		4,452		231,148
Tyson Foods, Inc. Class A (a)		2,660		164,149
Whole Foods Market, Inc. (a)		2,885		85,742
				3,005,955
Health Care – Products — 3.0%
Abbott Laboratories (a)		15,507		688,666
Baxter International, Inc. (a)		4,399		228,132
Becton, Dickinson & Co. (a)		1,940		355,874
Boston Scientific Corp. (a) (b)		12,454		309,731
C.R. Bard, Inc. (a)		678		168,510
The Cooper Cos., Inc. (a)		444		88,751
Danaher Corp. (a)		5,430		464,428
DENTSPLY SIRONA, Inc. (a)		2,028		126,628
Edwards Lifesciences Corp. (a) (b)		1,947		183,154
Henry Schein, Inc. (a) (b)		737		125,268
Hologic, Inc. (a) (b)		2,466		104,928
IDEXX Laboratories, Inc. (a) (b)		795		122,915
Intuitive Surgical, Inc. (a) (b)		342		262,133
Medtronic PLC (a)		12,351		994,997
Patterson Cos., Inc. (a)		852		38,536
Stryker Corp. (a)		2,774		365,197
Thermo Fisher Scientific, Inc. (a)		3,543		544,205
Varian Medical Systems, Inc. (a) (b)		857		78,098
Zimmer Biomet Holdings, Inc. (a)		1,771		216,257
				5,466,408
Health Care – Services — 2.0%
Aetna, Inc. (a)		3,134		399,742
Anthem, Inc. (a)		2,344		387,651
Centene Corp. (a) (b)		1,515		107,959
Cigna Corp. (a)		2,345		343,519
DaVita, Inc. (a) (b)		1,373		93,323
Envision Healthcare Corp. (a) (b)		1,006		61,688
HCA Holdings, Inc. (a) (b)		2,667		237,336
Humana, Inc. (a)		1,338		275,815
Laboratory Corp. of America Holdings (a) (b)		921		132,136
Quest Diagnostics, Inc. (a)		1,239		121,657
UnitedHealth Group, Inc. (a)		8,643		1,417,538
Universal Health Services, Inc. Class B (a)		793		98,689
				3,677,053
Household Products & Wares — 0.4%
Avery Dennison Corp. (a)		821		66,173
Church & Dwight Co., Inc. (a)		2,370		118,192
The Clorox Co. (a)		1,141		153,841
Kimberly-Clark Corp. (a)		3,202		421,479
				759,685
Pharmaceuticals — 6.1%
AbbVie, Inc. (a)		14,368		936,219

The accompanying notes are an integral part of the portfolio of investments.

41

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Allergan PLC (a)		3,001	$	716,999
AmerisourceBergen Corp. (a)		1,512		133,812
Bristol-Myers Squibb Co. (a)		15,060		818,963
Cardinal Health, Inc. (a)		2,837		231,357
Eli Lilly & Co. (a)		8,776		738,149
Express Scripts Holding Co. (a) (b)		5,531		364,548
Johnson & Johnson (a)		24,463		3,046,867
Mallinckrodt PLC (a) (b)		902		40,202
McKesson Corp. (a)		1,868		276,950
Mead Johnson Nutrition Co. (a)		1,601		142,617
Merck & Co., Inc. (a)		24,771		1,573,949
Mylan NV (a) (b)		4,056		158,143
Perrigo Co. PLC (a)		1,332		88,431
Pfizer, Inc. (a)		53,650		1,835,367
Zoetis, Inc. (a)		4,518		241,126
				11,343,699
				41,556,637
Diversified — 0.0%
Holding Company – Diversified — 0.0%
Leucadia National Corp. (a)		2,905		75,530
Energy — 6.5%
Oil & Gas — 5.1%
Anadarko Petroleum Corp. (a)		4,978		308,636
Apache Corp. (a)		3,366		172,979
Cabot Oil & Gas Corp. (a)		4,253		101,689
Chesapeake Energy Corp. (a) (b)		7,048		41,865
Chevron Corp. (a)		16,971		1,822,176
Cimarex Energy Co. (a)		850		101,567
Concho Resources, Inc. (a) (b)		1,318		169,152
ConocoPhillips (a)		11,070		552,061
Devon Energy Corp. (a)		4,638		193,497
EOG Resources, Inc. (a)		5,160		503,358
EQT Corp. (a)		1,530		93,483
Exxon Mobil Corp. (a)		37,247		3,054,627
Helmerich & Payne, Inc. (a)		913		60,778
Hess Corp. (a)		2,515		121,248
Marathon Oil Corp. (a)		7,515		118,737
Marathon Petroleum Corp. (a)		4,635		234,253
Murphy Oil Corp. (a)		1,605		45,887
Newfield Exploration Co. (a) (b)		1,932		71,310
Noble Energy, Inc. (a)		3,776		129,668
Occidental Petroleum Corp. (a)		6,853		434,206
Phillips 66 (a)		4,039		319,970
Pioneer Natural Resources Co. (a)		1,515		282,139
Range Resources Corp. (a)		1,772		51,565
Southwestern Energy Co. (a) (b)		4,854		39,657
Tesoro Corp. (a)		1,085		87,950
Transocean Ltd. (a) (b)		3,645		45,380
Valero Energy Corp. (a)		4,141		274,507
				9,432,345

	Number of Shares		Value
Oil & Gas Services — 1.0%
Baker Hughes, Inc. (a)		3,852	$	230,426
Halliburton Co. (a)		7,713		379,557
National Oilwell Varco, Inc. (a)		3,542		141,999
Schlumberger Ltd. (a)		12,500		976,250
TechnipFMC PLC (a) (b)		4,256		138,320
				1,866,552
Pipelines — 0.4%
Kinder Morgan, Inc. (a)		17,188		373,667
ONEOK, Inc. (a)		1,869		103,617
The Williams Cos., Inc. (a)		7,234		214,054
				691,338
				11,990,235
Financial — 18.1%
Banks — 7.7%
Bank of America Corp. (a)		90,830		2,142,680
The Bank of New York Mellon Corp. (a)		9,437		445,709
BB&T Corp. (a)		7,204		322,019
Capital One Financial Corp. (a)		4,338		375,931
Citigroup, Inc. (a)		24,975		1,494,004
Citizens Financial Group, Inc. (a)		4,642		160,381
Comerica, Inc. (a)		1,629		111,717
Fifth Third Bancorp (a)		6,654		169,012
The Goldman Sachs Group, Inc. (a)		3,324		763,589
Huntington Bancshares, Inc. (a)		9,779		130,941
JP Morgan Chase & Co. (a)		32,168		2,825,637
KeyCorp (a)		9,537		169,568
M&T Bank Corp. (a)		1,383		213,992
Morgan Stanley (a)		13,044		558,805
Northern Trust Corp. (a)		1,972		170,736
The PNC Financial Services Group, Inc. (a)		4,364		524,727
Regions Financial Corp. (a)		11,423		165,976
State Street Corp. (a)		3,311		263,589
SunTrust Banks, Inc. (a)		4,474		247,412
US Bancorp (a)		14,434		743,351
Wells Fargo & Co. (a)		40,593		2,259,406
Zions Bancorp (a)		1,783		74,886
				14,334,068
Diversified Financial Services — 3.3%
Affiliated Managers Group, Inc. (a)		498		81,642
Alliance Data Systems Corp. (a)		505		125,745
American Express Co. (a)		6,927		547,995
Ameriprise Financial, Inc. (a)		1,407		182,460
BlackRock, Inc. (a)		1,085		416,108
CBOE Holdings, Inc. (a)		843		68,342
The Charles Schwab Corp. (a)		10,776		439,769
CME Group, Inc. (a)		3,044		361,627
Discover Financial Services (a)		3,618		247,435
E*TRADE Financial Corp. (a) (b)		2,454		85,620

The accompanying notes are an integral part of the portfolio of investments.

42

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Franklin Resources, Inc. (a)		3,044	$	128,274
Intercontinental Exchange, Inc. (a)		5,336		319,466
Invesco Ltd. (a)		3,480		106,593
Mastercard, Inc. Class A (a)		8,590		966,117
Nasdaq, Inc. (a)		989		68,686
Navient Corp. (a)		2,663		39,306
Raymond James Financial, Inc. (a)		1,153		87,928
Synchrony Financial (a)		7,214		247,440
T. Rowe Price Group, Inc. (a)		2,207		150,407
Visa, Inc. Class A (a)		16,866		1,498,882
				6,169,842
Insurance — 4.2%
Aflac, Inc. (a)		3,659		264,985
The Allstate Corp. (a)		3,305		269,324
American International Group, Inc. (a)		8,388		523,663
Aon PLC (a)		2,341		277,853
Arthur J Gallagher & Co. (a)		1,531		86,563
Assurant, Inc. (a)		459		43,913
Berkshire Hathaway, Inc. Class B (a) (b)		17,090		2,848,561
Chubb Ltd. (a)		4,177		569,116
Cincinnati Financial Corp. (a)		1,376		99,444
The Hartford Financial Services Group, Inc. (a)		3,440		165,361
Lincoln National Corp. (a)		2,068		135,351
Loews Corp. (a)		2,452		114,680
Marsh & McLennan Cos., Inc. (a)		4,746		350,682
MetLife, Inc. (a)		9,867		521,175
Principal Financial Group, Inc. (a)		2,384		150,454
The Progressive Corp. (a)		5,307		207,928
Prudential Financial, Inc. (a)		3,866		412,425
Torchmark Corp. (a)		982		75,653
The Travelers Cos., Inc. (a)		2,535		305,569
Unum Group (a)		2,055		96,359
Willis Towers Watson PLC (a)		1,190		155,759
XL Group Ltd. (a)		2,390		95,265
				7,770,083
Real Estate Investment Trusts (REITS) — 2.9%
Alexandria Real Estate Equities, Inc. (a)		801		88,527
American Tower Corp. (a)		3,790		460,637
Apartment Investment & Management Co. Class A (a)		1,362		60,405
AvalonBay Communities, Inc. (a)		1,218		223,625
Boston Properties, Inc. (a)		1,424		188,552
CBRE Group, Inc. Class A (a) (b)		2,647		92,089
Crown Castle International Corp. (a)		3,280		309,796
Digital Realty Trust, Inc. (a)		1,491		158,627
Equinix, Inc. (a)		637		255,036
Equity Residential (a)		3,292		204,828
Essex Property Trust, Inc. (a)		613		141,928
Extra Space Storage, Inc. (a)		1,116		83,019
Federal Realty Investment Trust (a)		684		91,314

	Number of Shares		Value
GGP, Inc. (a)		5,264	$	122,020
HCP, Inc. (a)		4,229		132,283
Host Hotels & Resorts, Inc. (a)		6,508		121,439
Iron Mountain, Inc. (a)		2,212		78,902
Kimco Realty Corp. (a)		3,815		84,273
The Macerich Co. (a)		1,060		68,264
Mid-America Apartment Communities, Inc. (a)		1,007		102,452
Prologis, Inc. (a)		4,739		245,859
Public Storage (a)		1,330		291,150
Realty Income Corp. (a)		2,288		136,205
Regency Centers Corp. (a)		1,315		87,303
Simon Property Group, Inc. (a)		2,803		482,200
SL Green Realty Corp. (a)		918		97,877
UDR, Inc. (a)		2,302		83,471
Ventas, Inc. (a)		3,275		213,006
Vornado Realty Trust (a)		1,556		156,082
Welltower, Inc. (a)		3,217		227,828
Weyerhaeuser Co. (a)		6,602		224,336
				5,313,333
Savings & Loans — 0.0%
People’s United Financial, Inc. (a)		2,481		45,154
				33,632,480
Industrial — 9.7%
Aerospace & Defense — 2.2%
Arconic, Inc. (a)		4,133		108,863
The Boeing Co. (a)		5,178		915,781
General Dynamics Corp. (a)		2,562		479,606
Harris Corp. (a)		1,158		128,851
L3 Technologies, Inc. (a)		722		119,339
Lockheed Martin Corp. (a)		2,262		605,311
Northrop Grumman Corp. (a)		1,570		373,409
Raytheon Co. (a)		2,620		399,550
Rockwell Collins, Inc. (a)		1,117		108,528
TransDigm Group, Inc. (a)		465		102,374
United Technologies Corp. (a)		6,756		758,091
				4,099,703
Building Materials — 0.4%
Fortune Brands Home & Security, Inc. (a)		1,319		80,261
Johnson Controls International PLC (a)		8,360		352,123
Martin Marietta Materials, Inc. (a)		558		121,784
Masco Corp. (a)		2,886		98,095
Vulcan Materials Co. (a)		1,179		142,046
				794,309
Electrical Components & Equipment — 0.3%
Acuity Brands, Inc. (a)		412		84,048
AMETEK, Inc. (a)		1,975		106,808
Emerson Electric Co. (a)		5,747		344,015
				534,871

The accompanying notes are an integral part of the portfolio of investments.

43

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Electronics — 1.2%
Agilent Technologies, Inc. (a)		2,841	$	150,204
Allegion PLC (a)		810		61,317
Amphenol Corp. Class A (a)		2,800		199,276
Corning, Inc. (a)		8,489		229,203
FLIR Systems, Inc. (a)		1,332		48,325
Fortive Corp. (a)		2,801		168,676
Garmin Ltd. (a)		965		49,321
Honeywell International, Inc. (a)		6,857		856,234
Mettler-Toledo International, Inc. (a) (b)		235		112,544
PerkinElmer, Inc. (a)		920		53,415
TE Connectivity Ltd. (a)		3,222		240,200
Waters Corp. (a) (b)		742		115,982
				2,284,697
Engineering & Construction — 0.1%
Fluor Corp. (a)		1,160		61,039
Jacobs Engineering Group, Inc. (a)		1,173		64,844
				125,883
Environmental Controls — 0.2%
Republic Services, Inc. (a)		2,097		131,712
Stericycle, Inc. (a) (b)		712		59,018
Waste Management, Inc. (a)		3,628		264,554
				455,284
Hand & Machine Tools — 0.1%
Snap-on, Inc. (a)		527		88,889
Stanley Black & Decker, Inc. (a)		1,380		183,361
				272,250
Machinery – Construction & Mining — 0.3%
Caterpillar, Inc. (a)		5,209		483,187
Machinery – Diversified — 0.5%
Cummins, Inc. (a)		1,402		211,982
Deere & Co. (a)		2,575		280,315
Flowserve Corp. (a)		1,113		53,892
Rockwell Automation, Inc. (a)		1,168		181,869
Roper Technologies, Inc. (a)		912		188,319
Xylem, Inc. (a)		1,647		82,712
				999,089
Miscellaneous – Manufacturing — 2.6%
3M Co. (a)		5,395		1,032,225
Dover Corp. (a)		1,386		111,365
Eaton Corp. PLC (a)		4,032		298,973
General Electric Co. (a)		78,646		2,343,651
Illinois Tool Works, Inc. (a)		2,825		374,228
Ingersoll-Rand PLC (a)		2,290		186,223
Parker-Hannifin Corp. (a)		1,171		187,735
Pentair PLC (a)		1,471		92,349
Textron, Inc. (a)		2,509		119,403
				4,746,152

	Number of Shares		Value
Packaging & Containers — 0.2%
Ball Corp. (a)		1,564	$	116,143
Sealed Air Corp. (a)		1,782		77,659
WestRock Co. (a)		2,277		118,472
				312,274
Transportation — 1.6%
C.H. Robinson Worldwide, Inc. (a)		1,320		102,023
CSX Corp. (a)		8,364		389,344
Expeditors International of Washington, Inc. (a)		1,591		89,875
FedEx Corp. (a)		2,186		426,598
J.B. Hunt Transport Services, Inc. (a)		790		72,475
Kansas City Southern (a)		984		84,388
Norfolk Southern Corp. (a)		2,586		289,554
Ryder System, Inc. (a)		511		38,550
Union Pacific Corp. (a)		7,430		786,986
United Parcel Service, Inc. Class B (a)		6,203		665,582
				2,945,375
				18,053,074
Technology — 13.9%
Computers — 5.5%
Accenture PLC Class A (a)		5,585		669,530
Apple, Inc. (a)		47,293		6,794,112
Cognizant Technology Solutions Corp. Class A (a) (b)		5,400		321,408
CSRA, Inc. (a)		1,430		41,885
Hewlett Packard Enterprise Co. (a)		14,952		354,362
HP, Inc. (a)		15,217		272,080
International Business Machines Corp. (a)		7,781		1,354,983
NetApp, Inc. (a)		2,510		105,044
Seagate Technology PLC (a)		2,674		122,817
Teradata Corp. (a) (b)		1,066		33,174
Western Digital Corp. (a)		2,631		217,136
				10,286,531
Office & Business Equipment — 0.0%
Xerox Corp. (a)		7,518		55,182
Semiconductors — 3.4%
Advanced Micro Devices, Inc. (a) (b)		6,954		101,181
Analog Devices, Inc. (a)		3,277		268,550
Applied Materials, Inc. (a)		9,604		373,596
Broadcom Ltd. (a)		3,567		781,030
Intel Corp. (a)		42,855		1,545,780
KLA-Tencor Corp. (a)		1,424		135,380
Lam Research Corp. (a)		1,460		187,406
Microchip Technology, Inc. (a)		1,893		139,665
Micron Technology, Inc. (a) (b)		9,116		263,452
NVIDIA Corp. (a)		5,309		578,309
Qorvo, Inc. (a) (b)		1,124		77,061
QUALCOMM, Inc. (a)		13,290		762,049

The accompanying notes are an integral part of the portfolio of investments.

44

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Number of Shares		Value
Skyworks Solutions, Inc. (a)		1,640	$	160,687
Texas Instruments, Inc. (a)		8,919		718,515
Xilinx, Inc. (a)		2,221		128,574
				6,221,235
Software — 5.0%
Activision Blizzard, Inc. (a)		6,077		302,999
Adobe Systems, Inc. (a) (b)		4,446		578,558
Akamai Technologies, Inc. (a) (b)		1,588		94,804
Autodesk, Inc. (a) (b)		1,798		155,473
CA, Inc. (a)		2,950		93,574
Cerner Corp. (a) (b)		2,738		161,131
Citrix Systems, Inc. (a) (b)		1,432		119,414
The Dun & Bradstreet Corp. (a)		369		39,830
Electronic Arts, Inc. (a) (b)		2,690		240,809
Fidelity National Information Services, Inc. (a)		2,847		226,678
Fiserv, Inc. (a) (b)		1,979		228,199
Intuit, Inc. (a)		2,157		250,190
Microsoft Corp. (a)		69,893		4,603,153
Oracle Corp. (a)		27,119		1,209,779
Paychex, Inc. (a)		2,921		172,047
Red Hat, Inc. (a) (b)		1,587		137,276
salesforce.com, Inc. (a) (b)		5,903		486,938
Synopsys, Inc. (a) (b)		1,364		98,385
				9,199,237
				25,762,185
Utilities — 3.1%
Electric — 2.8%
The AES Corp. (a)		5,869		65,615
Alliant Energy Corp. (a)		2,106		83,419
Ameren Corp. (a)		2,172		118,569
American Electric Power Co., Inc. (a)		4,410		296,043
CMS Energy Corp. (a)		2,569		114,937
Consolidated Edison, Inc. (a)		2,738		212,633
Dominion Resources, Inc. (a)		5,593		433,849
DTE Energy Co. (a)		1,586		161,946
Duke Energy Corp. (a)		6,198		508,298
Edison International (a)		2,961		235,725
Entergy Corp. (a)		1,573		119,485
Eversource Energy (a)		2,879		169,228
Exelon Corp. (a)		8,178		294,244
FirstEnergy Corp. (a)		3,938		125,307
NextEra Energy, Inc. (a)		4,223		542,107
NRG Energy, Inc. (a)		2,744		51,313
PG&E Corp. (a)		4,521		300,014
Pinnacle West Capital Corp. (a)		968		80,712
PPL Corp. (a)		6,241		233,351
Public Service Enterprise Group, Inc. (a)		4,508		199,930
SCANA Corp. (a)		1,266		82,733
The Southern Co. (a)		8,848		440,453
WEC Energy Group, Inc. (a)		2,841		172,250

	Number of Shares		Value
Xcel Energy, Inc. (a)		4,530	$	201,359
				5,243,520
Gas — 0.2%
CenterPoint Energy, Inc. (a)		3,953		108,984
NiSource, Inc. (a)		2,737		65,113
Sempra Energy (a)		2,239		247,410
				421,507
Water — 0.1%
American Water Works Co., Inc. (a)		1,653		128,554
				5,793,581
TOTAL COMMON STOCK (Cost $145,910,497)				182,785,994
TOTAL EQUITIES (Cost $145,910,497)				182,785,994
	Principal Amount
BONDS & NOTES — 0.0%
CORPORATE DEBT — 0.0%
Forest Products & Paper — 0.0%
Sino Forest Corp. (a) (c) 5.000% 8/01/49	$	359,000		-
TOTAL CORPORATE DEBT (Cost $0)				-
TOTAL BONDS & NOTES (Cost $0)				-
	Units
PURCHASED OPTIONS — 0.3%
Financial — 0.3%
Diversified Financial Services — 0.3%
S&P 500 Index, Put, Expires 06/16/17, Strike 2,175.00		114		123,120
S&P 500 Index, Put, Expires 06/16/17, Strike 2,150.00		90		82,800
S&P 500 Index, Put, Expires 06/16/17, Strike 2,125.00		94		73,790
S&P 500 Index, Put, Expires 05/19/17, Strike 2,200.00		128		85,760
S&P 500 Index, Put, Expires 05/19/17, Strike 2,175.00		90		49,950
S&P 500 Index, Put, Expires 05/19/17, Strike 2,150.00		91		40,950
S&P 500 Index, Put, Expires 05/19/17, Strike 2,100.00		90		27,900

The accompanying notes are an integral part of the portfolio of investments.

45

MML Managed Volatility Fund – Portfolio of Investments (Continued)

	Units		Value
S&P 500 Index, Put, Expires 04/21/17, Strike 2,125.00		74	$	5,920
				490,190
TOTAL PURCHASED OPTIONS (Cost $1,126,088)				490,190
TOTAL LONG-TERM INVESTMENTS (Cost $147,036,585)				183,276,184
	Principal Amount
SHORT-TERM INVESTMENTS — 1.1%
Repurchase Agreement — 1.1%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (d)	$	2,156,100		2,156,100
TOTAL SHORT-TERM INVESTMENTS (Cost $2,156,100)				2,156,100
TOTAL INVESTMENTS — 99.9% (Cost $149,192,685) (e)				185,432,284
Other Assets/(Liabilities) — 0.1%				182,808
NET ASSETS — 100.0%			$	185,615,092

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) All or a portion of these securities are pledged/held as collateral for written options. (Note 2).

(b) Non-income producing security.

(c) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2017, these securities amounted to a value of $0 or 0.00% of net assets.

(d) Maturity value of $2,156,109. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $2,203,048.

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

The accompanying notes are an integral part of the portfolio of investments.

46

MML Mid Cap Growth Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 95.2%
COMMON STOCK — 94.6%
Basic Materials — 3.5%
Chemicals — 3.0%
Air Products & Chemicals, Inc.		34,000	$	4,599,860
Ashland Global Holdings, Inc.		27,000		3,342,870
RPM International, Inc.		68,000		3,742,040
Valvoline, Inc. (a)		66,000		1,620,300
				13,305,070
Mining — 0.5%
Franco-Nevada Corp.		38,000		2,489,380
				15,794,450
Communications — 2.8%
Internet — 1.9%
Dropbox, Inc. (b) (c)		9,011		93,084
Match Group, Inc. (a) (c)		42,000		685,860
Snap, Inc. Class A (a) (c)		19,900		448,347
TripAdvisor, Inc. (a) (c)		25,000		1,079,000
VeriSign, Inc. (a) (c)		59,000		5,139,490
Zillow Group, Inc. Class A (c)		14,000		473,340
Zillow Group, Inc. Class C (a) (c)		15,000		505,050
				8,424,171
Media — 0.4%
FactSet Research Systems, Inc.		10,000		1,649,100
Telecommunications — 0.5%
DigitalGlobe, Inc. (c)		76,000		2,489,000
				12,562,271
Consumer, Cyclical — 16.5%
Airlines — 0.3%
United Continental Holdings, Inc. (c)		17,000		1,200,880
Apparel — 0.5%
Carter’s, Inc.		24,000		2,155,200
Auto Manufacturers — 0.8%
Ferrari NV		25,000		1,859,000
Tesla, Inc. (a) (c)		6,000		1,669,800
				3,528,800
Auto Parts & Equipment — 0.3%
WABCO Holdings, Inc. (c)		13,000		1,526,460
Entertainment — 0.6%
Vail Resorts, Inc.		13,000		2,494,700
Food Services — 0.6%
Aramark		76,000		2,802,120
Leisure Time — 2.3%
Norwegian Cruise Line Holdings Ltd. (c)		152,000		7,710,960
Royal Caribbean Cruises Ltd.		25,000		2,452,750
				10,163,710

	Number of Shares		Value
Lodging — 2.1%
Marriott International, Inc. Class A		76,000	$	7,157,680
MGM Resorts International		88,000		2,411,200
				9,568,880
Retail — 9.0%
AutoZone, Inc. (c)		8,500		6,145,925
Burlington Stores, Inc. (c)		25,000		2,432,250
CarMax, Inc. (c)		63,000		3,730,860
Casey’s General Stores, Inc.		21,000		2,357,250
Coach, Inc.		170,000		7,026,100
Dick’s Sporting Goods, Inc.		34,000		1,654,440
Dollar General Corp.		93,000		6,484,890
L Brands, Inc.		38,000		1,789,800
The Michaels Cos., Inc. (c)		128,000		2,865,920
O’Reilly Automotive, Inc. (c)		16,000		4,317,440
PVH Corp.		15,000		1,552,050
				40,356,925
				73,797,675
Consumer, Non-cyclical — 30.3%
Biotechnology — 2.0%
Alnylam Pharmaceuticals, Inc. (a) (c)		21,000		1,076,250
Illumina, Inc. (c)		19,000		3,242,160
Incyte Corp. (c)		19,000		2,539,730
Vertex Pharmaceuticals, Inc. (c)		20,000		2,187,000
				9,045,140
Commercial Services — 10.1%
CoreLogic, Inc. (c)		87,461		3,561,412
Equifax, Inc.		51,000		6,973,740
FleetCor Technologies, Inc. (c)		29,000		4,391,470
Gartner, Inc. (c)		17,000		1,835,830
Global Payments, Inc.		68,000		5,486,240
IHS Markit Ltd. (c)		148,000		6,208,600
KAR Auction Services, Inc.		68,000		2,969,560
MacDonald Dettwiler & Associates Ltd.		17,000		898,034
Sabre Corp.		102,000		2,161,380
TransUnion (c)		25,000		958,750
Vantiv, Inc. Class A (c)		76,000		4,873,120
Verisk Analytics, Inc. (c)		52,000		4,219,280
Wework Cos., Inc. Class A (b) (c)		12,099		626,849
				45,164,265
Foods — 2.2%
Blue Buffalo Pet Products, Inc. (c)		42,000		966,000
Conagra Brands, Inc.		76,000		3,065,840
Sprouts Farmers Market, Inc. (a) (c)		118,000		2,728,160
TreeHouse Foods, Inc. (a) (c)		38,000		3,217,080
				9,977,080

The accompanying notes are an integral part of the portfolio of investments.

47

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

	Number of Shares		Value
Health Care – Products — 10.0%
Bruker Corp.		162,000	$	3,779,460
The Cooper Cos., Inc.		31,000		6,196,590
DENTSPLY SIRONA, Inc.		72,000		4,495,680
Henry Schein, Inc. (c)		21,000		3,569,370
Hologic, Inc. (c)		175,000		7,446,250
IDEXX Laboratories, Inc. (c)		17,000		2,628,370
Intuitive Surgical, Inc. (c)		7,000		5,365,290
Teleflex, Inc.		47,000		9,105,310
West Pharmaceutical Services, Inc.		25,000		2,040,250
				44,626,570
Health Care – Services — 3.3%
Acadia Healthcare Co., Inc. (a) (c)		44,000		1,918,400
Envision Healthcare Corp. (c)		74,000		4,537,680
MEDNAX, Inc. (c)		87,000		6,036,060
Quintiles IMS Holdings, Inc. (c)		30,000		2,415,900
				14,908,040
Pharmaceuticals — 2.7%
Alkermes PLC (c)		93,000		5,440,500
Catalent, Inc. (c)		102,000		2,888,640
TESARO, Inc. (a) (c)		6,000		923,220
Zoetis, Inc.		51,000		2,721,870
				11,974,230
				135,695,325
Energy — 0.9%
Oil & Gas — 0.9%
ARC Resources Ltd. (a)		68,000		971,538
Centennial Resource Development, Inc. (b) (c)		19,204		331,481
Centennial Resource Development, Inc. Class A (a) (c)		38,000		692,741
Concho Resources, Inc. (c)		17,000		2,181,780
				4,177,540
Financial — 8.1%
Banks — 0.2%
Webster Financial Corp.		17,000		850,680
Diversified Financial Services — 4.6%
CBOE Holdings, Inc.		75,000		6,080,250
E*TRADE Financial Corp. (c)		1,000		34,890
FNF Group		186,000		7,242,840
Intercontinental Exchange, Inc.		17,000		1,017,790
SLM Corp. (c)		85,000		1,028,500
TD Ameritrade Holding Corp.		132,000		5,129,520
				20,533,790
Insurance — 3.1%
The Progressive Corp.		131,000		5,132,580
Willis Towers Watson PLC		66,000		8,638,740
				13,771,320
Real Estate Investment Trusts (REITS) — 0.2%
SBA Communications Corp. (c)		7,000		842,590
				35,998,380

	Number of Shares		Value
Industrial — 20.3%
Aerospace & Defense — 2.1%
Harris Corp.		51,000	$	5,674,770
Rockwell Collins, Inc.		40,000		3,886,400
				9,561,170
Building Materials — 0.7%
Fortune Brands Home & Security, Inc.		4,163		253,318
Martin Marietta Materials, Inc.		13,000		2,837,250
				3,090,568
Electrical Components & Equipment — 0.3%
Acuity Brands, Inc.		7,000		1,428,000
Electronics — 6.6%
Agilent Technologies, Inc.		118,000		6,238,660
Allegion PLC		64,000		4,844,800
Fortive Corp.		63,000		3,793,860
Keysight Technologies, Inc. (c)		161,000		5,818,540
Mettler-Toledo International, Inc. (c)		4,000		1,915,640
Sensata Technologies Holding NV (c)		152,000		6,637,840
				29,249,340
Environmental Controls — 1.2%
Waste Connections, Inc.		59,000		5,204,980
Machinery – Diversified — 4.5%
Cognex Corp.		17,000		1,427,150
IDEX Corp.		71,000		6,639,210
The Middleby Corp. (c)		15,000		2,046,750
Roper Technologies, Inc.		34,000		7,020,660
Xylem, Inc.		63,000		3,163,860
				20,297,630
Miscellaneous – Manufacturing — 2.4%
Colfax Corp. (c)		38,000		1,491,880
Textron, Inc.		195,000		9,280,050
				10,771,930
Packaging & Containers — 1.3%
Ardagh Group SA (c)		9,000		197,640
Ball Corp.		76,000		5,643,760
				5,841,400
Transportation — 1.2%
J.B. Hunt Transport Services, Inc.		17,000		1,559,580
Kansas City Southern		37,000		3,173,120
Old Dominion Freight Line, Inc.		8,000		684,560
				5,417,260
				90,862,278
Technology — 12.2%
Computers — 0.5%
CSRA, Inc.		76,000		2,226,040
Semiconductors — 3.5%
KLA-Tencor Corp.		25,000		2,376,750

The accompanying notes are an integral part of the portfolio of investments.

48

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

	Number of Shares		Value
Microchip Technology, Inc.		110,000	$	8,115,800
NXP Semiconductor NV (c)		30,000		3,105,000
Xilinx, Inc.		34,000		1,968,260
				15,565,810
Software — 8.2%
athenahealth, Inc. (a) (c)		8,000		901,520
Atlassian Corp. PLC Class A (c)		72,000		2,156,400
Black Knight Financial Services, Inc. Class A (a) (c)		9,000		344,700
Electronic Arts, Inc. (c)		32,000		2,864,640
Fidelity National Information Services, Inc.		30,000		2,388,600
Fiserv, Inc. (c)		68,000		7,841,080
Guidewire Software, Inc. (c)		19,000		1,070,270
MSCI, Inc.		34,000		3,304,460
Red Hat, Inc. (c)		59,000		5,103,500
ServiceNow, Inc. (c)		8,000		699,760
Splunk, Inc. (c)		34,000		2,117,860
SS&C Technologies Holdings, Inc		68,000		2,407,200
Tableau Software, Inc. Class A (c)		30,000		1,486,500
Veeva Systems, Inc. Class A (c)		34,000		1,743,520
Workday, Inc. Class A (c)		26,000		2,165,280
				36,595,290
				54,387,140
TOTAL COMMON STOCK (Cost $300,533,662)				423,275,059
PREFERRED STOCK — 0.6%
Communications — 0.1%
Internet — 0.1%
Dropbox, Inc. Series A (b) (c)		11,190		115,593
Dropbox, Inc. Series A 1 (b) (c)		54,965		567,788
				683,381
Consumer, Non-cyclical — 0.5%
Commercial Services — 0.5%
Wework, Inc. Series D 1 (b) (c)		22,197		1,150,027
Wework, Inc. Series D 2 (b) (c)		17,440		903,566
				2,053,593
TOTAL PREFERRED STOCK (Cost $1,258,645)				2,736,974
TOTAL EQUITIES (Cost $301,792,307)				426,012,033
MUTUAL FUNDS — 5.6%
Diversified Financial Services — 5.6%
State Street Navigator Securities Lending Prime Portfolio (d)		21,488,000		21,488,000
T. Rowe Price Government Reserve Investment Fund		3,501,615		3,501,615

	Number of Shares		Value
TOTAL MUTUAL FUNDS (Cost $24,989,615)			$	24,989,615
TOTAL LONG-TERM INVESTMENTS (Cost $326,781,922)				451,001,648
	Principal Amount
SHORT-TERM INVESTMENTS — 4.2%
Repurchase Agreement — 4.2%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (e)	$	18,704,677		18,704,677
TOTAL SHORT-TERM INVESTMENTS (Cost $18,704,677)				18,704,677
TOTAL INVESTMENTS —105.0% (Cost $345,486,599) (f)				469,706,325
Other Assets/(Liabilities) — (5.0)%				(22,483,503	)
NET ASSETS — 100.0%			$	447,222,822

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, 2017, was $20,971,873 or 4.69% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2017, these securities amounted to a value of $3,788,388 or 0.85% of net assets.

(c) Non-income producing security.

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

(e) Maturity value of $18,704,755. Collateralized by U.S. Government Agency obligations with a rate of 2.125%, maturity date of 9/30/21, and an aggregate market value, including accrued interest, of $19,082,119.

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

The accompanying notes are an integral part of the portfolio of investments.

49

MML Mid Cap Value Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 95.2%
COMMON STOCK — 95.2%
Communications — 0.9%
Telecommunications — 0.9%
Level 3 Communications, Inc. (a)		74,974	$	4,290,012
Consumer, Cyclical — 7.4%
Apparel — 0.4%
Ralph Lauren Corp.		26,183		2,137,056
Auto Manufacturers — 0.9%
Honda Motor Co. Ltd. Sponsored ADR (Japan)		145,776		4,411,182
Auto Parts & Equipment — 1.0%
Delphi Automotive PLC		60,141		4,840,749
Home Builders — 0.9%
PulteGroup, Inc.		177,364		4,176,922
Leisure Time — 0.8%
Carnival Corp.		62,992		3,710,859
Retail — 2.8%
Advance Auto Parts, Inc.		34,448		5,107,261
CST Brands, Inc.		68,016		3,270,889
L Brands, Inc.		19,976		940,870
Target Corp.		69,375		3,828,806
				13,147,826
Toys, Games & Hobbies — 0.6%
Mattel, Inc.		105,256		2,695,606
				35,120,200
Consumer, Non-cyclical — 16.0%
Foods — 5.9%
Conagra Brands, Inc.		177,785		7,171,847
General Mills, Inc.		56,780		3,350,588
The J.M. Smucker Co.		18,954		2,484,490
Kellogg Co.		56,647		4,113,139
Lamb Weston Holdings, Inc.		36,310		1,527,198
Mondelez International, Inc. Class A		135,701		5,845,999
Sysco Corp.		72,452		3,761,708
				28,254,969
Health Care – Products — 4.2%
Abbott Laboratories		67,259		2,986,972
Baxter International, Inc.		70,845		3,674,022
STERIS PLC		53,805		3,737,295
Zimmer Biomet Holdings, Inc.		79,067		9,654,872
				20,053,161
Health Care – Services — 3.0%
HCA Holdings, Inc. (a)		35,874		3,192,427
LifePoint Health, Inc. (a)		104,264		6,829,292
Quest Diagnostics, Inc.		41,955		4,119,562
				14,141,281

	Number of Shares		Value
Pharmaceuticals — 2.9%
Cardinal Health, Inc.		51,178	$	4,173,566
Express Scripts Holding Co. (a)		41,884		2,760,574
McKesson Corp.		22,025		3,265,426
Mead Johnson Nutrition Co.		37,807		3,367,848
				13,567,414
				76,016,825
Energy — 13.0%
Oil & Gas — 9.7%
Anadarko Petroleum Corp.		94,296		5,846,352
Cimarex Energy Co.		13,358		1,596,148
Devon Energy Corp.		108,052		4,507,930
EQT Corp.		141,434		8,641,617
Helmerich & Payne, Inc.		26,028		1,732,684
Imperial Oil Ltd.		261,254		7,960,305
Marathon Petroleum Corp.		70,315		3,553,720
Noble Energy, Inc.		189,246		6,498,708
Occidental Petroleum Corp.		91,762		5,814,040
				46,151,504
Oil & Gas Services — 3.1%
Baker Hughes, Inc.		119,264		7,134,372
Frank’s International NV		45,119		476,908
Halliburton Co.		34,871		1,716,002
National Oilwell Varco, Inc.		131,863		5,286,388
				14,613,670
Pipelines — 0.2%
Spectra Energy Partners LP (b)		25,594		1,117,434
				61,882,608
Financial — 25.5%
Banks — 10.6%
Bank of Hawaii Corp.		28,940		2,383,498
BB&T Corp.		134,473		6,010,943
Comerica, Inc.		38,464		2,637,861
Commerce Bancshares, Inc.		83,674		4,699,132
M&T Bank Corp.		33,446		5,175,100
Northern Trust Corp.		160,772		13,919,640
The PNC Financial Services Group, Inc.		39,063		4,696,935
State Street Corp.		40,912		3,257,004
SunTrust Banks, Inc.		33,355		1,844,532
UMB Financial Corp.		25,662		1,932,605
Westamerica Bancorp.		69,360		3,872,369
				50,429,619
Diversified Financial Services — 3.4%
Ameriprise Financial, Inc.		42,398		5,498,173
Invesco Ltd.		222,543		6,816,492
T. Rowe Price Group, Inc.		53,523		3,647,592
				15,962,257

The accompanying notes are an integral part of the portfolio of investments.

50

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

	Number of Shares		Value
Insurance — 6.2%
Aflac, Inc.		33,048	$	2,393,336
The Allstate Corp.		25,430		2,072,291
Brown & Brown, Inc.		81,010		3,379,737
Chubb Ltd.		46,644		6,355,245
MetLife, Inc.		41,936		2,215,060
ProAssurance Corp.		38,173		2,299,923
Reinsurance Group of America, Inc.		33,643		4,271,988
Torchmark Corp.		21,147		1,629,165
Unum Group		103,009		4,830,092
				29,446,837
Real Estate Investment Trusts (REITS) — 4.4%
American Tower Corp.		30,682		3,729,090
Empire State Realty Trust, Inc. Class A		91,683		1,892,337
MGM Growth Properties LLC Class A		95,454		2,582,031
Piedmont Office Realty Trust, Inc. Class A		184,757		3,950,105
Weyerhaeuser Co.		264,580		8,990,428
				21,143,991
Savings & Loans — 0.9%
Capitol Federal Financial, Inc.		288,427		4,219,687
				121,202,391
Industrial — 17.9%
Building Materials — 3.0%
Johnson Controls International PLC		344,200		14,497,704
Electrical Components & Equipment — 2.0%
Emerson Electric Co.		60,201		3,603,632
Hubbell, Inc.		48,124		5,777,286
				9,380,918
Electronics — 3.4%
Keysight Technologies, Inc. (a)		162,602		5,876,436
Koninklijke Philips NV		169,964		5,463,448
TE Connectivity Ltd.		62,420		4,653,411
				15,993,295
Environmental Controls — 1.2%
Republic Services, Inc.		92,292		5,796,860
Machinery – Diversified — 1.4%
Cummins, Inc.		26,931		4,071,967
Rockwell Automation, Inc.		15,780		2,457,104
				6,529,071
Miscellaneous – Manufacturing — 3.3%
Ingersoll-Rand PLC		76,551		6,225,127
ITT, Inc.		17,131		702,714
Parker-Hannifin Corp.		18,245		2,925,039
Textron, Inc.		122,582		5,833,677
				15,686,557

	Number of Shares		Value
Packaging & Containers — 2.6%
Bemis Co., Inc.		76,350	$	3,730,461
Sonoco Products Co.		69,569		3,681,592
WestRock Co.		92,939		4,835,616
				12,247,669
Transportation — 1.0%
Heartland Express, Inc.		249,960		5,011,698
				85,143,772
Technology — 6.2%
Computers — 0.7%
NetApp, Inc.		85,021		3,558,129
Semiconductors — 5.5%
Applied Materials, Inc.		223,257		8,684,697
Lam Research Corp.		43,030		5,523,331
Maxim Integrated Products, Inc.		138,342		6,219,856
Teradyne, Inc.		183,091		5,694,130
				26,122,014
				29,680,143
Utilities — 8.3%
Electric — 6.9%
Ameren Corp.		61,776		3,372,352
Consolidated Edison, Inc.		38,126		2,960,865
Edison International		85,867		6,835,872
Eversource Energy		35,080		2,062,002
NorthWestern Corp.		49,491		2,905,122
PG&E Corp.		104,994		6,967,402
Westar Energy, Inc.		25,847		1,402,717
Xcel Energy, Inc.		146,716		6,521,526
				33,027,858
Gas — 1.4%
Atmos Energy Corp.		36,697		2,898,696
Spire, Inc.		53,355		3,601,462
				6,500,158
				39,528,016
TOTAL COMMON STOCK (Cost $384,238,701)				452,863,967
TOTAL EQUITIES (Cost $384,238,701)				452,863,967
MUTUAL FUNDS — 2.2%
Diversified Financial Services — 2.2%
iShares Russell Mid-Cap Value ETF		126,098		10,464,873
TOTAL MUTUAL FUNDS (Cost $9,652,856)				10,464,873
TOTAL LONG-TERM INVESTMENTS (Cost $393,891,557)				463,328,840

The accompanying notes are an integral part of the portfolio of investments.

51

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

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 2.1%
Repurchase Agreement — 2.1%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (c)	$	9,781,932	$	9,781,932
TOTAL SHORT-TERM INVESTMENTS (Cost $9,781,932)				9,781,932
TOTAL INVESTMENTS — 99.5% (Cost $403,673,489) (d)				473,110,772
Other Assets/(Liabilities) — 0.5%				2,602,608
NET ASSETS — 100.0%			$	475,713,380

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

ETF Exchange-Traded Fund

(a) Non-income producing security.

(b) Security is a Master Limited Partnership.

(c) Maturity value of $9,781,972. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $9,979,103.

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

The accompanying notes are an integral part of the portfolio of investments.

52

MML Moderate Allocation Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
MUTUAL FUNDS — 100.1%
Equity Funds — 59.8%
MML Blue Chip Growth Fund, Initial Class (a)		6,457,930	$	99,581,278
MML Equity Income Fund, Initial Class (a)		7,305,089		88,975,981
MML Equity Index Fund, Class III (a)		2,691,849		75,667,864
MML Focused Equity Fund, Class II (a)		3,197,413		45,179,444
MML Foreign Fund, Initial Class (a)		8,176,225		82,661,639
MML Fundamental Growth Fund, Class II (a)		5,796,569		72,109,319
MML Fundamental Value Fund, Class II (a)		5,969,213		91,269,263
MML Global Fund, Class I (a)		7,517,393		93,666,713
MML Income & Growth Fund, Initial Class (a)		7,237,872		88,591,557
MML International Equity Fund, Class II (a)		6,897,074		70,695,012
MML Large Cap Growth Fund, Initial Class (a)		2,831,008		32,754,763
MML Mid Cap Growth Fund, Initial Class (a)		5,152,468		80,017,825
MML Mid Cap Value Fund, Initial Class (a)		6,913,521		84,275,821
MML Small Cap Growth Equity Fund, Initial Class (a)		1,575,138		21,197,713
MML Small Company Value Fund, Class II (a)		2,228,199		38,391,875
MML Small/Mid Cap Value Fund, Initial Class (a)		1,696,262		22,848,650
MML Strategic Emerging Markets Fund, Class II (a)		4,465,865		42,782,984
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares (a)		319,604		25,204,003
Oppenheimer Global Fund/VA, Non-Service Shares (a)		1,639,801		63,378,327
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares (a)		18,273,458		181,272,706
Oppenheimer International Growth Fund/VA, Non-Service Shares (a)		19,916,803		44,414,471
				1,444,937,208
Fixed Income Funds — 40.3%
MML Dynamic Bond Fund, Class II (a)		21,214,046		212,776,884

	Number of Shares		Value
MML High Yield Fund, Class II (a)		4,947,337	$	50,858,619
MML Inflation-Protected and Income Fund, Initial Class (a)		7,391,785		76,209,307
MML Managed Bond Fund, Initial Class (a)		26,879,715		332,964,752
MML Short-Duration Bond Fund, Class II (a)		10,154,486		99,717,052
MML Total Return Bond Fund, Class II (a)		19,324,576		200,009,361
				972,535,975
TOTAL MUTUAL FUNDS (Cost $2,401,065,329)				2,417,473,183
TOTAL LONG-TERM INVESTMENTS (Cost $2,401,065,329)				2,417,473,183
TOTAL INVESTMENTS — 100.1% (Cost $2,401,065,329) (b)				2,417,473,183
Other Assets/(Liabilities) — (0.1)%				(1,684,280	)
NET ASSETS — 100.0%			$	2,415,788,903

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Affiliated issuer. See Note 4 for a summary of transactions in the investments of affiliated issuers.

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

The accompanying notes are an integral part of the portfolio of investments.

53

MML Small Cap Growth Equity Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.4%
COMMON STOCK — 97.4%
Basic Materials — 3.1%
Chemicals — 3.1%
Ferro Corp. (a)		38,300	$	581,777
Ingevity Corp. (a)		20,352		1,238,419
Methanex Corp.		19,560		917,364
Minerals Technologies, Inc.		11,893		911,004
Platform Specialty Products Corp. (a)		136,229		1,773,702
PolyOne Corp.		30,083		1,025,529
				6,447,795
Communications — 6.1%
Internet — 3.2%
Dropbox, Inc. (a) (b)		10,469		108,145
GoDaddy, Inc. Class A (a)		21,049		797,757
Just Eat PLC (a)		85,010		602,130
Mimecast Ltd. (a)		32,400		725,436
Proofpoint, Inc. (a) (c)		9,612		714,748
Stamps.com, Inc. (a) (c)		8,437		998,519
The Trade Desk, Inc. Class A (a)		11,836		440,891
Wix.com Ltd. (a)		16,374		1,111,795
Zendesk, Inc. (a)		16,933		474,801
Zillow Group, Inc. Class C (a)		20,050		675,084
				6,649,306
Media — 0.5%
The New York Times Co. Class A		71,351		1,027,454
Telecommunications — 2.4%
Arista Networks, Inc. (a)		11,070		1,464,229
Ciena Corp. (a)		49,016		1,157,267
Infinera Corp. (a) (c)		37,343		382,019
Oclaro, Inc. (a)		68,723		674,860
Vonage Holdings Corp. (a)		209,725		1,325,462
				5,003,837
				12,680,597
Consumer, Cyclical — 13.9%
Airlines — 0.8%
Spirit Airlines, Inc. (a)		31,484		1,670,856
Apparel — 1.5%
Deckers Outdoor Corp. (a)		15,300		913,869
Oxford Industries, Inc.		8,984		514,424
Steven Madden Ltd. (a)		21,701		836,574
Wolverine World Wide, Inc.		35,223		879,518
				3,144,385
Auto Manufacturers — 0.5%
Wabash National Corp. (c)		52,371		1,083,556
Auto Parts & Equipment — 0.4%
Tenneco, Inc.		12,516		781,249

	Number of Shares		Value
Distribution & Wholesale — 0.8%
Beacon Roofing Supply, Inc. (a)		15,904	$	781,841
WESCO International, Inc. (a)		13,528		940,872
				1,722,713
Entertainment — 1.4%
Cinemark Holdings, Inc.		19,095		846,672
Marriott Vacations Worldwide Corp.		11,514		1,150,594
National CineMedia, Inc.		70,624		891,981
				2,889,247
Home Furnishing — 0.8%
iRobot Corp. (a) (c)		11,630		769,208
La-Z-Boy, Inc.		33,194		896,238
				1,665,446
Leisure Time — 2.1%
Acushnet Holdings Corp. (a)		47,579		822,165
ClubCorp Holdings, Inc.		32,095		515,125
Fox Factory Holding Corp. (a)		25,829		741,292
Lindblad Expeditions Holdings, Inc. (a)		98,055		878,573
Planet Fitness, Inc. Class A		67,202		1,294,982
				4,252,137
Lodging — 0.5%
Hyatt Hotels Corp. Class A (a)		18,962		1,023,569
Retail — 5.1%
Bloomin’ Brands, Inc.		56,556		1,115,850
The Cheesecake Factory, Inc.		15,971		1,011,923
Chico’s FAS, Inc.		81,510		1,157,442
FirstCash, Inc.		19,637		965,159
Five Below, Inc. (a)		8,346		361,465
Kate Spade & Co. (a)		69,296		1,609,746
Nu Skin Enterprises, Inc. Class A		20,804		1,155,454
Panera Bread Co. Class A (a) (c)		8,296		2,172,473
Wingstop, Inc.		34,170		966,328
				10,515,840
				28,748,998
Consumer, Non-cyclical — 18.3%
Beverages — 0.4%
MGP Ingredients, Inc.		16,270		882,322
Biotechnology — 3.0%
Aduro Biotech, Inc. (a)		39,800		427,850
Alder Biopharmaceuticals, Inc. (a)		21,784		453,107
Bluebird Bio, Inc. (a) (c)		13,774		1,252,057
Blueprint Medicines Corp. (a)		26,781		1,070,972
Five Prime Therapeutics, Inc. (a)		14,949		540,407
Ionis Pharmaceuticals, Inc. (a) (c)		12,861		517,012
Otonomy, Inc. (a)		29,293		358,839
Spark Therapeutics, Inc. (a) (c)		6,772		361,219
Ultragenyx Pharmaceutical, Inc. (a)		16,249		1,101,357
				6,082,820

The accompanying notes are an integral part of the portfolio of investments.

54

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

	Number of Shares		Value
Commercial Services — 2.5%
Cardtronics PLC Class A (a)		28,195	$	1,318,116
CoStar Group, Inc. (a)		5,231		1,083,968
Monro Muffler Brake, Inc.		16,148		841,311
TriNet Group, Inc. (a)		37,107		1,072,392
WEX, Inc. (a)		8,663		896,621
				5,212,408
Foods — 1.6%
Calavo Growers, Inc. (c)		11,415		691,749
Greencore Group PLC		245,126		755,012
Performance Food Group Co. (a)		40,800		971,040
Sanderson Farms, Inc. (c)		9,241		959,585
				3,377,386
Health Care – Products — 5.3%
ABIOMED, Inc. (a)		4,562		571,163
Align Technology, Inc. (a)		16,827		1,930,225
Globus Medical, Inc. Class A (a)		37,097		1,098,813
Haemonetics Corp. (a)		28,200		1,144,074
Inogen, Inc. (a)		9,701		752,410
Insulet Corp. (a)		74,601		3,214,557
MiMedx Group, Inc. (a) (c)		98,600		939,658
Nevro Corp. (a) (c)		13,219		1,238,620
				10,889,520
Health Care – Services — 2.4%
Acadia Healthcare Co., Inc. (a) (c)		24,631		1,073,911
Kindred Healthcare, Inc.		128,043		1,069,159
LifePoint Health, Inc. (a)		20,420		1,337,510
Molina Healthcare, Inc. (a)		18,766		855,730
Teladoc, Inc. (a)		26,000		650,000
				4,986,310
Pharmaceuticals — 3.1%
Aerie Pharmaceuticals, Inc. (a)		24,026		1,089,579
Aimmune Therapeutics, Inc. (a)		4,500		97,785
Coherus Biosciences, Inc. (a)		10,360		219,114
Dexcom, Inc. (a)		9,186		778,330
Galapagos NV Sponsored ADR (Belgium) (a)		12,638		1,089,269
Global Blood Therapeutics, Inc. (a)		19,471		717,506
Ironwood Pharmaceuticals, Inc. (a) (c)		25,839		440,813
Portola Pharmaceuticals, Inc. (a)		15,926		624,140
TESARO, Inc. (a) (c)		8,257		1,270,505
				6,327,041
				37,757,807
Energy — 4.2%
Energy – Alternate Sources — 0.9%
First Solar, Inc. (a) (c)		21,282		576,742
Pattern Energy Group, Inc. (c)		60,289		1,213,618
				1,790,360

	Number of Shares		Value
Oil & Gas — 3.0%
Callon Petroleum Co. (a)		82,192	$	1,081,646
Centennial Resource Development, Inc. (a) (b)		4,111		70,960
Centennial Resource Development, Inc. Class A (a) (c)		39,473		719,593
Delek US Holdings, Inc.		44,356		1,076,520
QEP Resources, Inc. (a)		64,342		817,787
Resolute Energy Corp. (a) (c)		10,940		441,976
SRC Energy, Inc. (a) (c)		113,752		960,067
WPX Energy, Inc. (a)		74,962		1,003,741
				6,172,290
Oil & Gas Services — 0.3%
Forum Energy Technologies, Inc. (a)		33,534		694,154
				8,656,804
Financial — 20.4%
Banks — 6.7%
Ameris Bancorp		29,469		1,358,521
ConnectOne Bancorp, Inc.		40,930		992,552
FCB Financial Holdings, Inc. Class A (a)		23,918		1,185,137
FNB Corp.		50,273		747,560
Great Western Bancorp, Inc.		24,070		1,020,809
MB Financial, Inc.		56,025		2,398,990
South State Corp.		11,336		1,012,872
State Bank Financial Corp.		39,094		1,021,135
Texas Capital Bancshares, Inc. (a)		14,302		1,193,502
United Community Banks, Inc.		17,362		480,754
Western Alliance Bancorp (a)		48,526		2,382,141
				13,793,973
Diversified Financial Services — 0.6%
Air Lease Corp.		30,501		1,181,914
Financial Services — 2.1%
Blackhawk Network Holdings, Inc. (a)		20,621		837,213
Financial Engines, Inc.		8,400		365,820
Hannon Armstrong Sustainable Infrastructure Capital, Inc.		92,857		1,875,711
WageWorks, Inc. (a)		8,515		615,635
WisdomTree Investments, Inc. (c)		70,366		638,923
				4,333,302
Insurance — 3.2%
Assurant, Inc.		7,142		683,275
Assured Guaranty Ltd.		27,336		1,014,439
eHealth, Inc. (a)		67,022		806,945
Horace Mann Educators Corp.		28,467		1,168,570
Kemper Corp.		24,746		987,366
MBIA, Inc. (a)		60,209		509,970
MGIC Investment Corp. (a)		138,925		1,407,310
				6,577,875

The accompanying notes are an integral part of the portfolio of investments.

55

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

	Number of Shares		Value
Private Equity — 1.2%
Kennedy-Wilson Holdings, Inc.		109,520	$	2,431,344
Real Estate Investment Trusts (REITS) — 4.9%
CoreSite Realty Corp.		13,538		1,219,097
LaSalle Hotel Properties		72,573		2,100,988
Life Storage, Inc.		10,715		879,916
MFA Financial, Inc.		131,519		1,062,673
Outfront Media, Inc.		44,072		1,170,112
Potlatch Corp.		9,500		434,150
PS Business Parks, Inc.		10,350		1,187,766
Redwood Trust, Inc.		67,930		1,128,317
Rexford Industrial Realty, Inc.		45,598		1,026,867
				10,209,886
Savings & Loans — 1.7%
Pacific Premier Bancorp, Inc. (a)		15,122		582,953
Sterling Bancorp		125,154		2,966,150
				3,549,103
				42,077,397
Industrial — 15.5%
Aerospace & Defense — 1.2%
Astronics Corp. (a)		18,406		584,022
HEICO Corp. Class A		9,172		687,900
Teledyne Technologies, Inc. (a)		9,647		1,219,960
				2,491,882
Building Materials — 1.7%
Armstrong Flooring, Inc. (a)		32,763		603,494
Masonite International Corp. (a)		36,026		2,855,061
				3,458,555
Electrical Components & Equipment — 0.1%
SunPower Corp. (a) (c)		40,716		248,368
Electronics — 1.6%
Coherent, Inc. (a)		3,752		771,561
II-VI, Inc. (a)		22,414		808,025
Itron, Inc. (a)		11,230		681,661
Watts Water Technologies, Inc. Class A		16,169		1,008,137
				3,269,384
Environmental Controls — 1.5%
Casella Waste Systems, Inc. Class A (a)		50,101		706,925
Clean Harbors, Inc. (a)		42,409		2,358,789
				3,065,714
Hand & Machine Tools — 0.9%
Milacron Holdings Corp. (a)		60,920		1,133,721
Regal Beloit Corp.		9,920		750,448
				1,884,169
Machinery – Diversified — 2.2%
Altra Industrial Motion Corp.		39,172		1,525,749

	Number of Shares		Value
Applied Industrial Technologies, Inc.		14,156	$	875,549
The Middleby Corp. (a)		10,713		1,461,789
Zebra Technologies Corp. Class A (a)		8,218		749,892
				4,612,979
Metal Fabricate & Hardware — 2.0%
Advanced Drainage Systems, Inc.		97,812		2,142,083
Rexnord Corp. (a)		36,512		842,697
The Timken Co.		26,231		1,185,641
				4,170,421
Miscellaneous – Manufacturing — 0.5%
John Bean Technologies Corp.		11,332		996,649
Packaging & Containers — 0.8%
Graphic Packaging Holding Co.		66,075		850,385
KapStone Paper and Packaging Corp.		30,308		700,115
				1,550,500
Transportation — 2.5%
Kirby Corp. (a)		19,007		1,340,944
Knight Transportation, Inc.		49,537		1,552,985
Swift Transportation Co. (a) (c)		110,318		2,265,932
				5,159,861
Trucking & Leasing — 0.5%
GATX Corp. (c)		17,726		1,080,577
				31,989,059
Technology — 15.0%
Computers — 1.1%
EPAM Systems, Inc. (a)		9,860		744,627
Nutanix, Inc. Class A (a)		5,235		98,261
VeriFone Systems, Inc. (a)		38,211		715,692
Virtusa Corp. (a)		26,378		797,143
				2,355,723
Semiconductors — 6.5%
Advanced Micro Devices, Inc. (a)		47,847		696,174
Cavium, Inc. (a)		28,855		2,067,749
Entegris, Inc. (a)		84,646		1,980,716
Impinj, Inc. (a) (c)		24,304		735,682
Integrated Device Technology, Inc. (a)		3,968		93,923
MACOM Technology Solutions Holdings, Inc. (a)		42,812		2,067,820
MaxLinear, Inc. Class A (a)		75,342		2,113,343
MKS Instruments, Inc.		19,016		1,307,350
Monolithic Power Systems, Inc.		6,895		635,030
Tower Semiconductor Ltd. (a)		72,723		1,676,265
				13,374,052
Software — 7.4%
2U, Inc. (a) (c)		52,171		2,069,102
Allscripts Healthcare Solutions, Inc. (a)		91,090		1,155,021
Aspen Technology, Inc. (a)		14,281		841,437

The accompanying notes are an integral part of the portfolio of investments.

56

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

	Number of Shares		Value
BroadSoft, Inc. (a)		36,239	$	1,456,808
Callidus Software, Inc. (a)		52,542		1,121,772
Envestnet, Inc. (a)		7,693		248,484
Fair Isaac Corp.		12,854		1,657,523
Five9, Inc. (a)		35,800		589,268
Guidewire Software, Inc. (a)		10,651		599,971
HubSpot, Inc. (a)		40,940		2,478,917
Telogis (a) (b)		80,369		255,573
Twilio, Inc. Class A (a) (c)		18,359		530,024
The Ultimate Software Group, Inc. (a)		5,125		1,000,451
Veeva Systems, Inc. Class A (a)		24,869		1,275,282
				15,279,633
				31,009,408
Utilities — 0.9%
Electric — 0.9%
8Point3 Energy Partners LP		51,601		700,226
Black Hills Corp. (c)		16,703		1,110,247
				1,810,473
TOTAL COMMON STOCK (Cost $175,161,469)				201,178,338
PREFERRED STOCK — 1.0%
Communications — 0.5%
Internet — 0.5%
Draftkings, Inc. Series D (a) (b)		14,868		40,144
Draftkings, Inc. Series D 1 (a) (b)		28,744		93,418
The Honest Company Series D (a) (b)		4,027		141,066
Veracode, Inc. Series 8 (a) (b)		10,688		412,984
Zuora, Inc. Series F (a) (b)		69,937		295,834
				983,446
Technology — 0.5%
Software — 0.5%
Cloudera, Inc. Series F (a) (b)		12,068		251,618
Docusign, Inc. Series E (a) (b)		2,601		-
Marklogic Corp. Series F (a) (b)		22,966		241,602
Telogis (a) (b)		109,450		481,843
				975,063
TOTAL PREFERRED STOCK (Cost $1,631,106)				1,958,509
TOTAL EQUITIES (Cost $176,792,575)				203,136,847

	Number of Shares		Value
MUTUAL FUNDS — 13.8%
Diversified Financial Services — 13.8%
iShares Russell 2000 ETF (c)		25,668	$	3,528,837
State Street Navigator Securities Lending Prime Portfolio (d)		25,078,115		25,078,115
TOTAL MUTUAL FUNDS (Cost $28,590,434)				28,606,952
TOTAL LONG-TERM INVESTMENTS (Cost $205,383,009)				231,743,799
	Principal Amount
SHORT-TERM INVESTMENTS — 0.5%
Repurchase Agreement — 0.5%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (e)	$	1,058,175		1,058,175
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		14,043		14,043
TOTAL SHORT-TERM INVESTMENTS (Cost $1,072,218)				1,072,218
TOTAL INVESTMENTS — 112.7% (Cost $206,455,227) (f)				232,816,017
Other Assets/(Liabilities) — (12.7)%				(26,165,431	)
NET ASSETS — 100.0%			$	206,650,586

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ADR American Depositary Receipt

ETF Exchange-Traded Fund

(a) Non-income producing security.

(b) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At March 31, 2017, these securities amounted to a value of $2,393,187 or 1.16% of net assets.

(c) Denotes all or a portion of security on loan. The total value of securities on loan as of March 31, 2017, was $24,494,577 or 11.85% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

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

(e) Maturity value of $1,058,179. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $1,081,405.

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

The accompanying notes are an integral part of the portfolio of investments.

57

MML Small Company Value Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 98.6%
COMMON STOCK — 98.6%
Basic Materials — 4.3%
Chemicals — 2.3%
American Vanguard Corp.		21,601	$	358,560
Innospec, Inc.		6,183		400,349
KMG Chemicals, Inc.		16,000		737,120
Minerals Technologies, Inc.		11,800		903,880
				2,399,909
Forest Products & Paper — 0.7%
Clearwater Paper Corp. (a)		13,000		728,000
Iron & Steel — 1.1%
Carpenter Technology Corp.		18,200		678,860
Reliance Steel & Aluminum Co.		5,800		464,116
				1,142,976
Mining — 0.2%
New Gold, Inc. (a)		56,500		168,370
				4,439,255
Communications — 2.7%
Internet — 0.5%
New Media Investment Group, Inc.		13,100		186,151
Rightside Group Ltd. (a)		31,640		313,869
				500,020
Media — 0.9%
Cable One, Inc.		900		562,023
Scholastic Corp.		8,200		349,074
				911,097
Telecommunications — 1.3%
Harmonic, Inc. (a) (b)		98,300		584,885
Ixia (a)		38,200		750,630
				1,335,515
				2,746,632
Consumer, Cyclical — 9.1%
Apparel — 0.8%
Canada Goose Holdings, Inc. (a)		4,932		78,714
Crocs, Inc. (a)		18,000		127,260
Steven Madden Ltd. (a)		16,100		620,655
				826,629
Auto Manufacturers — 0.1%
Blue Bird Corp. (a) (b)		8,682		148,896
Auto Parts & Equipment — 1.0%
Dorman Products, Inc. (a)		12,200		1,001,986
Distribution & Wholesale — 1.9%
Beacon Roofing Supply, Inc. (a)		16,900		830,804
Pool Corp.		9,600		1,145,568
				1,976,372

	Number of Shares		Value
Home Builders — 0.7%
Cavco Industries, Inc. (a)		6,000	$	698,400
Home Furnishing — 0.3%
Ethan Allen Interiors, Inc.		12,000		367,800
Leisure Time — 0.9%
LCI Industries		9,300		928,140
Lodging — 0.5%
ILG, Inc.		22,700		475,792
Retail — 2.4%
Fred’s, Inc. Class A (b)		19,900		260,690
Genesco, Inc. (a)		4,700		260,615
Lumber Liquidators Holdings, Inc. (a) (b)		21,400		449,186
Party City Holdco, Inc. (a) (b)		16,200		227,610
PriceSmart, Inc.		7,300		673,060
Red Robin Gourmet Burgers, Inc. (a) (b)		7,600		444,220
Sportsman’s Warehouse Holdings, Inc. (a) (b)		31,033		148,338
				2,463,719
Textiles — 0.5%
Culp, Inc.		15,700		489,840
				9,377,574
Consumer, Non-cyclical — 14.3%
Agriculture — 0.3%
Vector Group Ltd.		13,779		286,603
Commercial Services — 4.8%
Aaron’s, Inc.		27,900		829,746
American Public Education, Inc. (a)		16,200		370,980
Capella Education Co.		10,300		875,758
FTI Consulting, Inc. (a)		11,200		461,104
Green Dot Corp. Class A (a)		23,580		786,629
Matthews International Corp. Class A		5,700		385,605
McGrath RentCorp		16,099		540,443
Navigant Consulting, Inc. (a)		31,900		729,234
				4,979,499
Foods — 2.4%
Nomad Foods Ltd. (a) (b)		67,100		768,295
Pinnacle Foods, Inc.		9,100		526,617
Post Holdings, Inc. (a)		6,900		603,888
SpartanNash Co.		18,500		647,315
				2,546,115
Health Care – Products — 4.6%
Analogic Corp.		5,300		402,270
Atrion Corp.		2,150		1,006,630
Haemonetics Corp. (a)		19,000		770,830
Halyard Health, Inc. (a)		21,700		826,553
Quidel Corp. (a)		26,100		590,904

The accompanying notes are an integral part of the portfolio of investments.

58

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

	Number of Shares		Value
West Pharmaceutical Services, Inc.		13,800	$	1,126,218
				4,723,405
Health Care – Services — 1.8%
The Ensign Group, Inc.		8,600		161,680
National HealthCare Corp.		5,200		370,760
Select Medical Holdings Corp. (a)		30,600		408,510
Triple-S Management Corp. Class B (a)		12,900		226,653
WellCare Health Plans, Inc. (a)		4,700		658,987
				1,826,590
Household Products & Wares — 0.4%
CSS Industries, Inc.		14,900		386,208
				14,748,420
Diversified — 0.2%
Holding Company – Diversified — 0.2%
Conyers Park Acquisition Corp. (a)		18,300		202,764
Energy — 5.0%
Oil & Gas — 3.1%
Centennial Resource Development, Inc. Class A (a) (b)		25,500		464,865
Matador Resources Co. (a) (b)		34,500		820,755
Parsley Energy, Inc. Class A (a)		17,800		578,678
Western Refining, Inc.		16,600		582,162
WPX Energy, Inc. (a)		57,300		767,247
				3,213,707
Oil & Gas Services — 1.9%
Frank’s International NV		33,500		354,095
Keane Group, Inc. (a) (b)		12,880		184,184
Oceaneering International, Inc.		16,400		444,112
Tesco Corp. (a)		51,300		412,965
TETRA Technologies, Inc. (a)		69,800		284,086
Thermon Group Holdings, Inc. (a)		12,112		252,414
				1,931,856
				5,145,563
Financial — 35.8%
Banks — 18.2%
BankUnited, Inc.		34,900		1,302,119
CoBiz Financial, Inc.		36,700		616,560
Columbia Banking System, Inc.		28,700		1,119,013
East West Bancorp, Inc.		33,526		1,730,277
First Hawaiian, Inc.		13,442		402,185
Glacier Bancorp, Inc.		27,300		926,289
Home BancShares, Inc.		82,550		2,234,628
Hope Bancorp, Inc.		36,200		693,954
Howard Bancorp, Inc. (a)		10,485		196,070
National Bank Holdings Corp. Class A		27,300		887,250
Park Sterling Corp.		26,200		322,522
Pinnacle Financial Partners, Inc.		7,500		498,375
Popular, Inc.		25,900		1,054,907

	Number of Shares		Value
Prosperity Bancshares, Inc.		18,200	$	1,268,722
SVB Financial Group (a)		7,850		1,460,806
Synovus Financial Corp.		10,200		418,404
Texas Capital Bancshares, Inc. (a)		10,700		892,915
Towne Bank		35,600		1,153,440
Webster Financial Corp.		16,575		829,413
Wintrust Financial Corp. (b)		11,900		822,528
				18,830,377
Diversified Financial Services — 0.7%
CBOE Holdings, Inc.		8,321		674,583
Financial Services — 1.2%
Houlihan Lokey, Inc.		11,326		390,181
Janus Capital Group, Inc.		33,800		446,160
Stifel Financial Corp. (a)		7,400		371,406
				1,207,747
Insurance — 4.4%
Assured Guaranty Ltd.		17,082		633,913
Employers Holdings, Inc.		15,200		576,840
Kinsale Capital Group, Inc.		10,613		340,041
ProAssurance Corp.		19,700		1,186,925
Radian Group, Inc.		50,900		914,164
Safety Insurance Group, Inc.		5,400		378,540
State Auto Financial Corp.		16,900		463,905
				4,494,328
Private Equity — 0.2%
Safeguard Scientifics, Inc. (a)		19,200		243,840
Real Estate Investment Trusts (REITS) — 8.7%
Acadia Realty Trust		23,900		718,434
American Assets Trust, Inc.		6,200		259,408
American Campus Communities, Inc.		9,900		471,141
Cedar Realty Trust, Inc.		155,500		780,610
Douglas Emmett, Inc.		14,700		564,480
EastGroup Properties, Inc.		12,100		889,713
First Potomac Realty Trust		60,390		620,809
Healthcare Realty Trust, Inc.		15,100		490,750
Kilroy Realty Corp.		9,000		648,720
Potlatch Corp.		16,000		731,200
PS Business Parks, Inc.		6,200		711,512
Retail Opportunity Investments Corp.		18,000		378,540
Saul Centers, Inc.		11,700		720,954
Sunstone Hotel Investors, Inc.		20,800		318,864
Washington Real Estate Investment Trust		22,000		688,160
				8,993,295
Savings & Loans — 2.4%
Beneficial Bancorp, Inc.		42,823		685,168
Meridian Bancorp, Inc.		17,500		320,250
United Financial Bancorp, Inc.		45,600		775,656
WSFS Financial Corp.		14,700		675,465
				2,456,539
				36,900,709

The accompanying notes are an integral part of the portfolio of investments.

59

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

	Number of Shares		Value
Industrial — 17.6%
Aerospace & Defense — 0.8%
Kaman Corp. (b)		8,300	$	399,479
Triumph Group, Inc. (b)		16,700		430,025
				829,504
Building Materials — 0.6%
Universal Forest Products, Inc.		6,400		630,656
Electrical Components & Equipment — 4.1%
Advanced Energy Industries, Inc. (a)		11,200		767,872
Belden, Inc.		18,960		1,311,842
Energizer Holdings, Inc.		11,700		652,275
Littelfuse, Inc.		9,500		1,519,145
				4,251,134
Electronics — 4.2%
Badger Meter, Inc. (b)		13,600		499,800
Brady Corp. Class A		13,900		537,235
ESCO Technologies, Inc.		17,900		1,039,990
Knowles Corp. (a) (b)		45,100		854,645
Methode Electronics, Inc.		13,200		601,920
SYNNEX Corp.		7,200		805,968
				4,339,558
Engineering & Construction —0.8%
Aegion Corp. (a)		33,200		760,612
Environmental Controls — 0.4%
MSA Safety, Inc.		6,200		438,278
Machinery – Diversified — 0.6%
Applied Industrial Technologies, Inc.		10,100		624,685
Metal Fabricate & Hardware —1.6%
CIRCOR International, Inc.		10,700		636,008
RBC Bearings, Inc. (a)		5,900		572,831
Sun Hydraulics Corp.		12,600		454,986
				1,663,825
Miscellaneous – Manufacturing —1.5%
Colfax Corp. (a)		11,500		451,490
Hillenbrand, Inc.		10,230		366,746
Myers Industries, Inc.		45,750		725,137
				1,543,373
Transportation — 3.0%
Genesee & Wyoming, Inc. Class A (a)		10,050		681,993
Kirby Corp. (a)		6,750		476,213
Landstar System, Inc.		19,000		1,627,350
Universal Logistics Holdings, Inc.		22,300		320,005
				3,105,561
				18,187,186
Technology — 3.0%
Computers — 0.6%
CSRA, Inc.		19,700		577,013

	Number of Shares		Value
Semiconductors — 1.4%
Brooks Automation, Inc.		25,500	$	571,200
Cabot Microelectronics Corp.		8,400		643,524
Rudolph Technologies, Inc. (a)		12,800		286,720
				1,501,444
Software — 1.0%
Callidus Software, Inc. (a)		24,300		518,805
Progress Software Corp.		19,100		554,855
				1,073,660
				3,152,117
Utilities — 6.6%
Electric — 3.8%
El Paso Electric Co.		11,100		560,550
NorthWestern Corp.		15,100		886,370
NRG Energy, Inc.		32,800		613,360
PNM Resources, Inc.		33,100		1,224,700
Portland General Electric Co.		14,800		657,416
				3,942,396
Gas — 2.5%
Atmos Energy Corp.		7,200		568,728
Chesapeake Utilities Corp.		12,700		878,840
ONE Gas, Inc.		17,300		1,169,480
				2,617,048
Water — 0.3%
California Water Service Group		7,800		279,631
				6,839,075
TOTAL COMMON STOCK (Cost $74,019,793)				101,739,295
TOTAL EQUITIES (Cost $74,019,793)				101,739,295
MUTUAL FUNDS — 5.7%
Diversified Financial Services — 5.7%
State Street Navigator Securities Lending Prime Portfolio (c)		5,933,427		5,933,427
T. Rowe Price Reserve Investment Fund		1,006		1,006
TOTAL MUTUAL FUNDS (Cost $5,934,433)				5,934,433
TOTAL LONG-TERM INVESTMENTS (Cost $79,954,226)				107,673,728

The accompanying notes are an integral part of the portfolio of investments.

60

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

	Principal Amount		Value
SHORT-TERM INVESTMENTS — 1.6%
Repurchase Agreement — 1.6%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (d)	$	1,604,949	$	1,604,949
TOTAL SHORT-TERM INVESTMENTS (Cost $1,604,949)				1,604,949
TOTAL INVESTMENTS — 105.9% (Cost $81,559,175) (e)				109,278,677
Other Assets/(Liabilities) — (5.9)%				(6,100,844	)
NET ASSETS — 100.0%			$	103,177,833

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, 2017, was $5,773,565 or 5.60% of net assets. Total securities on loan may not correspond with the amounts identified in the Portfolio of Investments because pending sales may be in the process of recall from the brokers. (Note 2).

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

(d) Maturity value of $1,604,956. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 5/15/18, and an aggregate market value, including accrued interest, of $1,638,850.

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

The accompanying notes are an integral part of the portfolio of investments.

61

MML Small/Mid Cap Value Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Number of Shares		Value
EQUITIES — 97.6%
COMMON STOCK — 97.6%
Basic Materials — 1.7%
Chemicals — 1.7%
Huntsman Corp.		83,950	$	2,060,133
Ingevity Corp. (a)		30,340		1,846,189
				3,906,322
Communications — 3.3%
Internet — 1.2%
CDW Corp.		44,400		2,562,324
Media — 0.8%
Scholastic Corp.		43,090		1,834,341
Telecommunications — 1.3%
Infinera Corp. (a)		147,500		1,508,925
NETGEAR, Inc. (a)		30,086		1,490,762
				2,999,687
				7,396,352
Consumer, Cyclical — 17.4%
Airlines — 1.2%
SkyWest, Inc.		80,920		2,771,510
Apparel — 0.6%
Crocs, Inc. (a)		196,660		1,390,386
Auto Parts & Equipment — 3.4%
Dana, Inc.		140,623		2,715,430
Lear Corp.		15,416		2,182,597
Tenneco, Inc.		44,721		2,791,485
				7,689,512
Distribution & Wholesale — 1.4%
Anixter International, Inc. (a)		38,800		3,076,840
Entertainment — 1.5%
Regal Entertainment Group Class A		144,330		3,258,971
Home Builders — 2.2%
CalAtlantic Group, Inc.		79,190		2,965,666
PulteGroup, Inc.		82,020		1,931,571
				4,897,237
Retail — 7.1%
Big Lots, Inc.		26,298		1,280,187
Bloomin’ Brands, Inc.		162,740		3,210,860
Brinker International, Inc.		61,819		2,717,563
Burlington Stores, Inc. (a)		19,559		1,902,895
Caleres, Inc.		68,940		1,821,395
The Children’s Place, Inc.		16,762		2,012,278
The Michaels Cos., Inc. (a)		131,140		2,936,225
				15,881,403
				38,965,859

	Number of Shares		Value
Consumer, Non-cyclical — 10.9%
Commercial Services — 4.6%
ABM Industries, Inc.		38,950	$	1,698,220
Booz Allen Hamilton Holding Corp.		92,410		3,270,390
Quanta Services, Inc. (a)		65,330		2,424,397
Sotheby’s (a)		63,040		2,867,059
				10,260,066
Foods — 0.6%
Ingredion, Inc.		10,482		1,262,347
Health Care – Services — 5.0%
ICON PLC (a)		40,850		3,256,562
LifePoint Health, Inc. (a)		51,230		3,355,565
Molina Healthcare, Inc. (a)		49,270		2,246,712
WellCare Health Plans, Inc. (a)		16,810		2,356,930
				11,215,769
Pharmaceuticals — 0.7%
Horizon Pharma PLC (a)		102,750		1,518,645
				24,256,827
Energy — 8.7%
Oil & Gas — 6.5%
Helmerich & Payne, Inc.		32,270		2,148,214
HollyFrontier Corp.		55,120		1,562,101
Oasis Petroleum, Inc. (a)		173,310		2,471,401
QEP Resources, Inc. (a)		208,350		2,648,128
SM Energy Co.		102,720		2,467,334
SRC Energy, Inc. (a)		376,220		3,175,297
				14,472,475
Oil & Gas Services — 2.2%
Oil States International, Inc. (a)		64,550		2,139,833
RPC, Inc.		150,450		2,754,739
				4,894,572
				19,367,047
Financial — 23.3%
Banks — 10.8%
Associated Banc-Corp.		100,347		2,448,467
Comerica, Inc.		53,285		3,654,285
Fulton Financial Corp.		133,970		2,391,364
Huntington Bancshares, Inc.		297,745		3,986,806
Synovus Financial Corp.		63,950		2,623,229
Texas Capital Bancshares, Inc. (a)		28,580		2,385,001
Webster Financial Corp.		58,593		2,931,994
Zions Bancorp		90,815		3,814,230
				24,235,376
Diversified Financial Services — 0.6%
OneMain Holdings, Inc. (a)		52,990		1,316,802
Insurance — 8.3%
American Financial Group, Inc.		37,040		3,534,357

The accompanying notes are an integral part of the portfolio of investments.

62

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

	Number of Shares		Value
Essent Group Ltd. (a)		89,270	$	3,228,896
First American Financial Corp.		59,560		2,339,517
The Hanover Insurance Group, Inc.		15,540		1,399,532
Reinsurance Group of America, Inc.		25,990		3,300,210
Selective Insurance Group, Inc.		44,740		2,109,491
Validus Holdings Ltd.		44,630		2,516,686
				18,428,689
Real Estate Investment Trusts (REITS) — 3.6%
Education Realty Trust, Inc.		73,970		3,021,674
Empire State Realty Trust, Inc. Class A		89,790		1,853,266
Gramercy Property Trust		123,868		3,257,728
				8,132,668
				52,113,535
Industrial — 18.7%
Aerospace & Defense — 1.1%
Esterline Technologies Corp. (a)		28,120		2,419,726
Electrical Components & Equipment — 1.2%
EnerSys		33,950		2,680,013
Electronics — 2.2%
Avnet, Inc.		65,710		3,006,890
Vishay Intertechnology, Inc.		118,556		1,950,246
				4,957,136
Engineering & Construction — 2.7%
AECOM (a)		79,673		2,835,562
Tutor Perini Corp. (a)		104,140		3,311,652
				6,147,214
Hand & Machine Tools — 1.4%
Regal Beloit Corp.		41,270		3,122,075
Machinery – Construction & Mining — 2.7%
Oshkosh Corp.		46,330		3,177,775
Terex Corp.		87,540		2,748,756
				5,926,531
Machinery – Diversified — 1.2%
SPX FLOW, Inc. (a)		77,970		2,706,339
Miscellaneous – Manufacturing — 1.9%
ITT, Inc.		41,110		1,686,332
Trinseo SA		39,740		2,666,554
				4,352,886
Packaging & Containers — 1.5%
Graphic Packaging Holding Co.		254,880		3,280,305
Transportation — 2.8%
Atlas Air Worldwide Holdings, Inc. (a)		39,030		2,164,214
Ryder System, Inc.		26,860		2,026,318

	Number of Shares		Value
Werner Enterprises, Inc.		81,090	$	2,124,558
				6,315,090
				41,907,315
Technology — 10.6%
Computers — 4.9%
Amdocs Ltd.		53,618		3,270,162
Genpact Ltd.		111,087		2,750,514
NCR Corp. (a)		59,040		2,696,947
VeriFone Systems, Inc. (a)		119,260		2,233,740
				10,951,363
Semiconductors — 4.3%
Cypress Semiconductor Corp.		247,090		3,399,958
Integrated Device Technology, Inc. (a)		81,520		1,929,578
Mellanox Technologies Ltd. (a)		29,760		1,516,272
Qorvo, Inc. (a)		40,430		2,771,881
				9,617,689
Software — 1.4%
Verint Systems, Inc. (a)		74,490		3,231,004
				23,800,056
Utilities — 3.0%
Electric — 2.4%
PNM Resources, Inc.		78,443		2,902,391
Portland General Electric Co.		52,130		2,315,615
				5,218,006
Gas — 0.6%
Southwest Gas Holdings, Inc.		17,020		1,411,128
				6,629,134
TOTAL COMMON STOCK (Cost $179,873,048)				218,342,447
TOTAL EQUITIES (Cost $179,873,048)				218,342,447
TOTAL LONG-TERM INVESTMENTS (Cost $179,873,048)				218,342,447
	Principal Amount
SHORT-TERM INVESTMENTS — 1.0%
Repurchase Agreement — 0.9%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (b)	$	1,978,353		1,978,353

The accompanying notes are an integral part of the portfolio of investments.

63

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

	Principal Amount		Value
Time Deposit — 0.1%
Euro Time Deposit 0.090% 4/03/17	$	182,085	$	182,085
TOTAL SHORT-TERM INVESTMENTS (Cost $2,160,438)				2,160,438
TOTAL INVESTMENTS — 98.6% (Cost $182,033,486) (c)				220,502,885
Other Assets/(Liabilities) — 1.4%				3,082,847
NET ASSETS — 100.0%			$	223,585,732

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a) Non-income producing security.

(b) Maturity value of $1,978,361. Collateralized by U.S. Government Agency obligations with a rate of 2.000%, maturity date of 8/31/21, and an aggregate market value, including accrued interest, of $2,021,976.

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

The accompanying notes are an integral part of the portfolio of investments.

64

MML Total Return Bond Fund – Portfolio of Investments

March 31, 2017 (Unaudited)

	Principal Amount		Value
BONDS & NOTES — 99.9%
BANK LOANS — 0.2%
Diversified Financial Services — 0.2%
AerCap Holdings N.V., A Deferred Principal 3.397% 10/06/23	$	840,000	$	848,610
TOTAL BANK LOANS (Cost $352,135)				848,610
CORPORATE DEBT — 25.2%
Aerospace & Defense — 0.2%
United Technologies Corp. STEP 1.778% 5/04/18		1,000,000		999,717
Airlines — 0.6%
Continental Airlines Pass-Through Trust 7.250% 5/10/21		1,752,931		1,945,753
Northwest Airlines Pass-Through Trust 7.041% 10/01/23		380,692		436,846
				2,382,599
Auto Manufacturers — 0.4%
Ford Motor Credit Co. LLC 1.684% 9/08/17		750,000		749,810
Ford Motor Credit Co. LLC 2.145% 1/09/18		500,000		501,271
General Motors Financial Co., Inc. 4.750% 8/15/17		500,000		505,434
				1,756,515
Auto Parts & Equipment — 0.1%
The Goodyear Tire & Rubber Co. 4.875% 3/15/27		210,000		210,000
Banks — 8.3%
American Express Centurion Bank 6.000% 9/13/17		750,000		764,896
Bank of America Corp. 5.650% 5/01/18		500,000		520,209
Bank of America Corp. 6.000% 9/01/17		500,000		508,981
Bank of America Corp. 6.875% 4/25/18		4,950,000		5,208,553
Bank of America Corp. 6.875% 11/15/18		750,000		807,610
Bank of America Corp. 7.625% 6/01/19		1,000,000		1,114,790
Citigroup, Inc. 1.550% 8/14/17		1,350,000		1,349,762
Citigroup, Inc. 1.850% 11/24/17		1,000,000		1,001,740
Citigroup, Inc. 2.050% 12/07/18		1,000,000		1,001,825

	Principal Amount		Value
Citigroup, Inc. 6.125% 5/15/18	$	2,720,000	$	2,847,149
The Goldman Sachs Group, Inc. 2.375% 1/22/18		1,500,000		1,508,223
The Goldman Sachs Group, Inc. 5.950% 1/18/18		2,100,000		2,168,611
The Goldman Sachs Group, Inc. 6.150% 4/01/18		1,860,000		1,937,711
The Goldman Sachs Group, Inc. 7.500% 2/15/19		500,000		548,730
HBOS PLC (a) 6.750% 5/21/18		1,100,000		1,151,940
JP Morgan Chase & Co. 3 mo. USD LIBOR + .550%, FRN 1.588% 4/25/18		700,000		702,893
JP Morgan Chase & Co. 2.950% 10/01/26		895,000		850,934
JP Morgan Chase & Co. 4.500% 1/24/22		900,000		969,926
JP Morgan Chase & Co. 6.000% 1/15/18		1,000,000		1,033,756
JP Morgan Chase Bank NA 6.000% 10/01/17		500,000		510,476
Morgan Stanley 3 mo. USD LIBOR + .800%, FRN 1.842% 2/14/20		2,000,000		2,004,350
Morgan Stanley 3 mo. USD LIBOR + 1.280%, FRN 2.318% 4/25/18		1,000,000		1,010,373
Morgan Stanley 5.500% 7/24/20		250,000		272,928
Morgan Stanley 5.950% 12/28/17		500,000		515,578
Morgan Stanley 6.625% 4/01/18		895,000		936,780
Wells Fargo & Co. 2.100% 7/26/21		710,000		695,390
Wells Fargo & Co. 2.500% 3/04/21		1,410,000		1,405,963
Wells Fargo & Co. 3.000% 4/22/26		475,000		455,867
Wells Fargo Bank NA 2.150% 12/06/19		1,000,000		1,003,368
				34,809,312
Beverages — 0.5%
Anheuser-Busch InBev Finance, Inc. 3.650% 2/01/26		1,399,000		1,414,669
Constellation Brands, Inc. 6.000% 5/01/22		325,000		369,424
DS Services of America, Inc. (a) 10.000% 9/01/21		330,000		353,925
				2,138,018

The accompanying notes are an integral part of the portfolio of investments.

65

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

	Principal Amount		Value
Biotechnology — 0.9%
Amgen, Inc. 4.400% 5/01/45	$	500,000	$	485,321
Baxalta, Inc. 2.875% 6/23/20		725,000		735,186
Celgene Corp. 5.000% 8/15/45		750,000		785,036
Gilead Sciences, Inc. 3.250% 9/01/22		600,000		612,908
Gilead Sciences, Inc. 4.150% 3/01/47		1,195,000		1,114,425
				3,732,876
Chemicals — 0.1%
Axalta Coating Systems LLC (a) 4.875% 8/15/24		180,000		184,500
Valvoline, Inc. (a) 5.500% 7/15/24		200,000		210,000
				394,500
Commercial Services — 0.1%
IHS Markit Ltd. (a) 5.000% 11/01/22		225,000		235,687
Computers — 0.2%
Apple, Inc. 4.650% 2/23/46		850,000		912,052
Diversified Financial Services — 0.7%
CIT Group, Inc. (a) 6.625% 4/01/18		350,000		364,438
Federal Home Loan Mortgage Corp. 1.250% 10/02/19		700,000		696,101
GE Capital International Funding Co. Unlimited Co. 4.418% 11/15/35		780,000		823,644
International Lease Finance Corp. (a) 7.125% 9/01/18		1,000,000		1,068,748
				2,952,931
Electric — 2.5%
Dominion Resources, Inc. (a) 1.875% 12/15/18		1,000,000		998,264
Duke Energy Carolinas LLC 4.000% 9/30/42		1,000,000		995,567
Duquesne Light Holdings, Inc. (a) 6.400% 9/15/20		1,000,000		1,116,523
Emera US Finance LP 2.150% 6/15/19		1,068,000		1,067,677
Jersey Central Power & Light Co. (a) 4.700% 4/01/24		800,000		854,153
Jersey Central Power & Light Co. 5.650% 6/01/17		500,000		503,036
Jersey Central Power & Light Co. 6.400% 5/15/36		425,000		493,258

	Principal Amount		Value
Kansas City Power & Light Co. 3.150% 3/15/23	$	500,000	$	503,122
LG&E and KU Energy LLC 4.375% 10/01/21		1,200,000		1,266,940
MidAmerican Energy Co. 4.800% 9/15/43		1,400,000		1,570,960
Southern California Edison Co. 3.600% 2/01/45		400,000		377,854
The Southern Co. 1.550% 7/01/18		750,000		747,124
				10,494,478
Entertainment — 0.1%
Churchill Downs, Inc. 5.375% 12/15/21		175,000		182,000
GLP Capital LP/GLP Financing II, Inc. 5.375% 4/15/26		200,000		206,500
				388,500
Food Services — 0.0%
Aramark Services, Inc. 4.750% 6/01/26		200,000		201,250
Foods — 0.6%
Chobani LLC/Chobani Finance Corp., Inc. (a) (b) 7.500% 4/15/25		105,000		107,494
Kraft Heinz Foods Co. 1.600% 6/30/17		558,000		558,170
Kraft Heinz Foods Co. 3.950% 7/15/25		500,000		507,592
Lamb Weston Holdings, Inc. (a) 4.875% 11/01/26		210,000		214,200
Mondelez International Holdings Netherlands BV (a) 1.625% 10/28/19		1,195,000		1,176,979
				2,564,435
Gas — 0.3%
CenterPoint Energy Resources Corp. 6.250% 2/01/37		1,095,000		1,261,967
Southern Co. Gas Capital Corp. 2.450% 10/01/23		100,000		95,915
				1,357,882
Health Care – Services — 1.3%
Aetna, Inc. 2.800% 6/15/23		485,000		481,037
Anthem, Inc. 3.125% 5/15/22		500,000		502,563
Anthem, Inc. 3.300% 1/15/23		530,000		534,553
Catholic Health Initiatives 2.950% 11/01/22		500,000		483,494
Centene Corp. 4.750% 1/15/25		259,000		260,458

The accompanying notes are an integral part of the portfolio of investments.

66

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

	Principal Amount		Value
DaVita, Inc. 5.000% 5/01/25	$	177,000	$	177,443
HCA, Inc. 5.000% 3/15/24		700,000		734,125
Northwell Healthcare, Inc. 3.979% 11/01/46		585,000		537,406
Providence St Joseph Health Obligated Group 2.746% 10/01/26		845,000		805,107
RWJ Barnabas Health, Inc. 3.949% 7/01/46		595,000		560,750
Tenet Healthcare Corp. 3 mo. USD LIBOR + 3.500%, FRN 4.631% 6/15/20		350,000		351,750
Tenet Healthcare Corp. 6.000% 10/01/20		40,000		42,300
WellCare Health Plans, Inc. 5.250% 4/01/25		155,000		158,612
				5,629,598
Household Products & Wares — 0.1%
Central Garden & Pet Co. 6.125% 11/15/23		125,000		131,875
Spectrum Brands, Inc. 5.750% 7/15/25		85,000		89,888
				221,763
Insurance — 0.7%
Berkshire Hathaway Finance Corp. 4.300% 5/15/43		500,000		513,388
Berkshire Hathaway Finance Corp. 4.400% 5/15/42		750,000		787,807
Farmers Exchange Capital III 3 mo. USD LIBOR + 3.454%, VRN (a) 5.454% 10/15/54		970,000		976,305
New York Life Global Funding (a) 1.550% 11/02/18		750,000		748,731
				3,026,231
Media — 0.9%
21st Century Fox America, Inc. 3.000% 9/15/22		890,000		889,253
Altice US Finance I Corp. (a) 5.375% 7/15/23		425,000		438,281
CCO Holdings LLC/CCO Holdings Capital Corp. (a) (b) 5.125% 5/01/27		299,000		300,495
Charter Communications Operating LLC/Charter Communications Operating Capital 4.464% 7/23/22		875,000		922,715
Charter Communications Operating LLC/Charter Communications Operating Capital 6.484% 10/23/45		200,000		230,267

	Principal Amount		Value
CSC Holdings LLC (a) 5.500% 4/15/27	$	400,000	$	406,500
CSC Holdings LLC 8.625% 2/15/19		100,000		109,750
DISH DBS Corp. 5.875% 7/15/22		100,000		105,062
DISH DBS Corp. 6.750% 6/01/21		70,000		75,556
Sirius XM Radio, Inc. (a) 4.250% 5/15/20		205,000		206,794
Virgin Media Secured Finance PLC (a) 5.250% 1/15/26		200,000		201,000
				3,885,673
Miscellaneous – Manufacturing — 0.2%
General Electric Co. 5.875% 1/14/38		244,000		307,964
Siemens Financieringsmaatschappij NV (a) 2.000% 9/15/23		550,000		522,115
				830,079
Oil & Gas — 0.2%
Gulfport Energy Corp. (a) 6.375% 5/15/25		200,000		196,500
Noble Energy, Inc. 5.250% 11/15/43		140,000		145,584
Shell International Finance BV 4.375% 5/11/45		415,000		420,853
				762,937
Packaging & Containers — 0.4%
Amcor Finance USA, Inc. (a) 3.625% 4/28/26		650,000		643,837
Ball Corp. 4.375% 12/15/20		350,000		366,625
Graphic Packaging International, Inc. 4.125% 8/15/24		200,000		198,250
Reynolds Group Issuer, Inc./Reynolds Group Issuer LLC/Reynolds Group Issuer Lu 5.750% 10/15/20		410,000		421,791
Sealed Air Corp. (a) 5.500% 9/15/25		190,000		201,400
				1,831,903
Pharmaceuticals — 0.9%
AbbVie, Inc. 1.800% 5/14/18		500,000		500,562
AbbVie, Inc. 3.200% 5/14/26		357,000		343,176
AbbVie, Inc. 3.600% 5/14/25		500,000		500,094

The accompanying notes are an integral part of the portfolio of investments.

67

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

	Principal Amount		Value
Actavis Funding SCS 3.800% 3/15/25	$	1,350,000	$	1,362,316
Grifols Worldwide Operations Ltd. 5.250% 4/01/22		200,000		207,600
Shire Acquisitions Investments Ireland DAC 1.900% 9/23/19		500,000		496,397
Valeant Pharmaceuticals International, Inc. (a) 5.500% 3/01/23		400,000		308,000
Valeant Pharmaceuticals International, Inc. (a) 5.625% 12/01/21		100,000		80,500
Valeant Pharmaceuticals International, Inc. (a) 6.125% 4/15/25		100,000		77,000
				3,875,645
Pipelines — 0.7%
Energy Transfer Partners LP 3 mo. USD LIBOR + 3.018%, FRN 4.052% 11/01/66		170,000		143,650
Energy Transfer Partners LP 5.150% 3/15/45		400,000		378,614
Florida Gas Transmission Co. LLC (a) 7.900% 5/15/19		1,000,000		1,109,377
Kinder Morgan Energy Partners LP 3.500% 9/01/23		567,000		558,050
Rockies Express Pipeline LLC (a) 5.625% 4/15/20		155,000		163,137
Rockies Express Pipeline LLC (a) 6.000% 1/15/19		75,000		78,188
Williams Partners LP 3.600% 3/15/22		683,000		692,820
				3,123,836
Real Estate Investment Trusts (REITS) — 2.0%
Equinix, Inc. 5.375% 5/15/27		223,000		230,248
HCP, Inc. 3.400% 2/01/25		1,000,000		969,355
HCP, Inc. 3.875% 8/15/24		500,000		502,791
MGM Growth Properties Operating Partnership LP/MGP Finance Co-Issuer, Inc. 5.625% 5/01/24		100,000		105,500
National Retail Properties, Inc. 6.875% 10/15/17		750,000		770,377
Realty Income Corp. 2.000% 1/31/18		750,000		751,272
SBA Communications Corp. (a) 4.875% 9/01/24		210,000		207,333

	Principal Amount		Value
Ventas Realty LP 3.500% 2/01/25	$	1,500,000	$	1,468,206
VEREIT Operating Partnership LP 4.875% 6/01/26		200,000		208,250
WEA Finance LLC/Westfield UK & Europe Finance PLC (a) 1.750% 9/15/17		1,550,000		1,550,383
Welltower, Inc. 4.000% 6/01/25		830,000		841,283
Welltower, Inc. 4.125% 4/01/19		750,000		774,830
				8,379,828
Retail — 0.3%
Wal-Mart Stores, Inc. 4.000% 4/11/43		400,000		399,992
Walgreens Boots Alliance, Inc. 3.800% 11/18/24		400,000		407,380
Walgreens Boots Alliance, Inc. 4.800% 11/18/44		275,000		280,512
				1,087,884
Semiconductors — 0.1%
NXP BV/NXP Funding LLC (a) 4.125% 6/01/21		200,000		207,500
Software — 0.3%
First Data Corp. (a) 5.000% 1/15/24		426,000		433,455
Microsoft Corp. 3.750% 2/12/45		635,000		602,384
Quintiles IMS, Inc. (a) 4.875% 5/15/23		175,000		177,406
Quintiles IMS, Inc. (a) 5.000% 10/15/26		200,000		200,750
				1,413,995
Telecommunications — 1.4%
AT&T, Inc. 3.600% 2/17/23		200,000		202,560
AT&T, Inc. 4.125% 2/17/26		500,000		507,050
AT&T, Inc. 4.750% 5/15/46		750,000		699,815
AT&T, Inc. 5.450% 3/01/47		1,030,000		1,052,921
Level 3 Financing, Inc. 5.250% 3/15/26		90,000		90,450
Level 3 Financing, Inc. 5.625% 2/01/23		175,000		181,125
Sprint Communications, Inc. (a) 9.000% 11/15/18		400,000		435,500
T-Mobile USA, Inc. 5.375% 4/15/27		133,000		137,323
T-Mobile USA, Inc. 6.633% 4/28/21		80,000		82,680

The accompanying notes are an integral part of the portfolio of investments.

68

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

	Principal Amount		Value
Verizon Communications, Inc. 4.522% 9/15/48	$	600,000	$	543,581
Verizon Communications, Inc. 4.862% 8/21/46		600,000		576,839
Verizon Communications, Inc. 5.150% 9/15/23		500,000		550,299
Verizon Communications, Inc. 5.250% 3/16/37		630,000		651,338
				5,711,481
Transportation — 0.1%
Burlington Northern Santa Fe LLC 4.150% 4/01/45		265,000		264,651
TOTAL CORPORATE DEBT (Cost $106,638,346)				105,783,756
MUNICIPAL OBLIGATIONS — 1.2%
Alabama Economic Settlement Authority 3.163% 9/15/25		1,000,000		1,005,780
City of New York NY 5.206% 10/01/31		750,000		869,280
Commonwealth of Massachusetts 4.910% 5/01/29		550,000		636,015
Los Angeles Community College District 6.750% 8/01/49		900,000		1,309,059
New York City Water & Sewer System 5.882% 6/15/44		315,000		410,300
New York State Dormitory Authority 5.289% 3/15/33		750,000		880,882
				5,111,316
TOTAL MUNICIPAL OBLIGATIONS (Cost $4,775,963)				5,111,316
NON-U.S. GOVERNMENT AGENCY OBLIGATIONS — 14.2%
Automobile ABS — 0.1%
Honda Auto Receivables Owner Trust, Series 2015-4, Class A2 0.820% 7/23/18		302,883		302,607
Nissan Auto Receivables Owner Trust, Series 2015-C, Class A2A 0.870% 11/15/18		331,589		331,317
				633,924
Commercial MBS — 2.2%
7 WTC Depositor LLC Trust, Series 2012-7WTC, Class A (a) 4.082% 3/13/31		95,236		95,691

	Principal Amount		Value
BAMLL Commercial Mortgage Securities Trust, Series 2012-PARK, Class A (a) 2.959% 12/10/30	$	375,000	$	378,196
Banc of America Large Loan, Inc., Series 2009-UB2, Class A4AA, VRN (a) 5.858% 2/24/51		63,262		63,427
Citigroup Commercial Mortgage Trust, Series 2013-375P, Class A (a) 3.251% 5/10/35		340,000		347,006
COMM Mortgage Trust, Series 2016-787S, Class A (a) 3.545% 2/10/36		340,000		347,132
COMM Mortgage Trust, Series 2013-300P, Class A1 (a) 4.353% 8/10/30		325,000		351,872
GS Mortgage Securities Corp., Series 2012-ALOH, Class A (a) 3.551% 4/10/34		370,000		387,174
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2012-C8, Class A3 2.829% 10/15/45		1,900,000		1,913,189
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2010-C2, Class A2 (a) 3.616% 11/15/43		841,906		849,880
Liberty Street Trust, Series 2016-225L, Class A (a) 3.597% 2/10/36		340,000		348,485
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2012-C6, Class A4 2.858% 11/15/45		1,780,000		1,798,991
Morgan Stanley Capital I Trust, Series 2015-420, Class A (a) 3.727% 10/11/50		400,000		413,453
RBS Commercial Funding, Inc. Trust, Series 2013-GSP, Class A, VRN (a) 3.834% 1/13/32		330,000		347,618
SFAVE Commercial Mortgage Securities Trust, Series 2015-5AVE, Class A1, VRN (a) 3.872% 1/05/43		370,000		360,310
Wells Fargo Commercial Mortgage Trust, Series 2010-C1, Class A2 (a) 4.393% 11/15/43		500,000		529,259
WF-RBS Commercial Mortgage Trust, Series 2011-C4, Class A4, VRN (a) 4.902% 6/15/44		800,000		872,780
				9,404,463

The accompanying notes are an integral part of the portfolio of investments.

69

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

	Principal Amount		Value
Credit Card ABS — 0.2%
Chase Issuance Trust, Series 2015-A6, Class A6, 1 mo. LIBOR + .250%, FRN 1.162% 5/15/19	$	865,000	$	865,073
Home Equity ABS — 0.7%
Bear Stearns I Trust, Series 2006-HE1, Class 1M1, 1 mo. USD LIBOR + .410%, FRN 1.392% 12/25/35		1,428,784		1,432,798
Wells Fargo Home Equity Trust, Series 2004-2, Class M3, 1 mo. USD LIBOR + 1.050%, FRN 2.032% 10/25/34		1,483,378		1,410,841
				2,843,639
Other ABS — 1.6%
Blue Hill CLO Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.180%, FRN (a) 2.203% 1/15/26		960,000		959,942
Countrywide Asset-Backed Certificates, Series 2006-15, Class A3, VRN 4.880% 10/25/46		1,662,548		1,532,899
First Frankin Mortgage Loan Trust, Series 2005-FF7, Class M2, 1 mo. USD LIBOR + .470%, FRN 1.452% 7/25/35		805,742		798,526
Magnetite CLO Ltd., Series 2015-12A, Class AR, 3 mo. USD LIBOR + 1.330%, FRN (a) 2.353% 4/15/27		1,060,000		1,061,493
RAMP Trust, Series 2005-RS2, Class M2, 1 mo. USD LIBOR + .480%, FRN 1.462% 2/25/35		370,489		370,470
Saxon Asset Securities Trust, Series 2005-1, Class M1, 1 mo. USD LIBOR + .690%, FRN 1.468% 5/25/35		1,227,862		1,202,550
Voya CLO Ltd., Series 2014-3A, Class A1, 3 mo. USD LIBOR + 1.420%, FRN (a) 2.458% 7/25/26		800,000		800,150
				6,726,030
Student Loans ABS — 5.1%
Access Group, Inc., Series 2015-1, Class A, 1 mo. USD LIBOR + .700%, FRN (a) 1.682% 7/25/56		993,821		987,121
Collegiate Funding Services Education Loan Trust, Series 2005-A, Class A4, 3 mo. USD LIBOR + .200%, FRN 1.351% 3/28/35		1,500,000		1,412,874

	Principal Amount		Value
Nelnet Student Loan Trust, Series 2015-1A, Class A, 1 mo. USD LIBOR + .590%, FRN (a) 1.572% 4/25/46	$	1,595,679	$	1,539,714
Nelnet Student Loan Trust, Series 2015-3A, Class A2, 1 mo. USD LIBOR + .600%, FRN (a) 1.582% 2/27/51		2,031,077		2,026,002
Pennsylvania Higher Education Assistance Agency, Series 2013-3A, Class A, 1 mo. USD LIBOR + .750%, FRN (a) 1.732% 11/25/42		1,442,446		1,423,069
SLC Student Loan Trust, Series 2006-2, Class A6, 3 mo. USD LIBOR + .160%, FRN 1.291% 9/15/39		2,300,000		2,144,689
SLC Student Loan Trust, Series 2005-2, Class B, 3 mo. USD LIBOR + .280%, FRN 1.411% 3/15/40		381,506		344,516
SLM Student Loan Trust, Series 2007-1, Class A5, 3 mo. USD LIBOR + .090%, FRN 1.128% 1/26/26		1,864,205		1,855,107
SLM Student Loan Trust, Series 2005-4, Class B, 3 mo. USD LIBOR + .180%, FRN 1.218% 7/25/55		199,133		182,825
SLM Student Loan Trust, Series 2005-9, Class B, 3 mo. USD LIBOR + .300%, FRN 1.338% 1/25/41		194,829		176,890
SLM Student Loan Trust, Series 2007-6, Class A4, 3 mo. USD LIBOR + .380%, FRN 1.418% 10/25/24		1,831,636		1,824,750
SLM Student Loan Trust, Series 2012-1, Class A2, 1 mo. USD LIBOR + .450%, FRN 1.432% 11/25/20		143,433		143,453
SLM Student Loan Trust, Series 2011-1, Class A1, 1 mo. USD LIBOR + .520%, FRN 1.502% 3/25/26		920,642		923,772
SLM Student Loan Trust, Series 2003-10A, Class A3, 3 mo. LIBOR + .470%, FRN (a) 1.601% 12/15/27		1,363,491		1,360,912
SLM Student Loan Trust, Series 2012-2, Class A, 1 mo. USD LIBOR + .700%, FRN 1.682% 1/25/29		1,440,848		1,429,955

The accompanying notes are an integral part of the portfolio of investments.

70

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

	Principal Amount		Value
SLM Student Loan Trust, Series 2007-6, Class B, 3 mo. USD LIBOR + .850%, FRN 1.888% 4/27/43	$	551,220	$	496,798
SLM Student Loan Trust, Series 2007-8, Class B, 3 mo. USD LIBOR + 1.000%, FRN 2.038% 4/27/83		200,203		177,147
SLM Student Loan Trust, Series 2008-9, Class A, 3 mo. USD LIBOR + 1.500%, FRN 2.538% 4/25/23		1,382,575		1,409,205
SLM Student Loan Trust, Series 2008-5, Class B, 3 mo. USD LIBOR + 1.850%, FRN 2.888% 7/25/73		700,000		688,521
SLM Student Loan Trust, Series 2008-9, Class B, 3 mo. USD LIBOR + 2.250%, FRN 3.288% 10/25/83		680,000		687,908
				21,235,228
WL Collateral CMO — 4.3%
Chase Mortgage Finance Trust, Series 2007-A1, Class 11A4, VRN 3.178% 3/25/37		808,746		761,021
Citigroup Mortgage Loan Trust, Series 2005-11, Class A2A, 1 year CMT + 2.400%, FRN 2.930% 10/25/35		1,026,462		1,044,240
First Horizon Mortgage Pass-Through Trust, Series 2005-AR5, Class 2A1, VRN 2.988% 11/25/35		1,399,486		1,340,973
Impac CMB Trust, Series 2005-1, Class 1A1, 1 mo. USD LIBOR + .520%, FRN 1.502% 4/25/35		1,642,576		1,513,409
IndyMac Index Mortgage Loan Trust, Series 2006-AR27, Class 1A3, 1 mo. USD LIBOR + .270%, FRN 1.252% 10/25/36		2,539,989		1,723,104
IndyMac Index Mortgage Loan Trust, Series 2005-AR19, Class A1, VRN 3.260% 10/25/35		1,562,191		1,334,772
Morgan Stanley Resecuritization Trust, Series 2014-R9, Class 3A, 12 mo. MTA + .840%, FRN (a) 1.454% 11/26/46		1,394,600		1,346,940
Nomura Asset Acceptance Corp. Alternative Loan Trust, Series 2005-AR1, Class M1, 1 mo. LIBOR + 1.070%, FRN 1.848% 2/25/35		2,603,018		2,491,181

	Principal Amount		Value
Nomura Resecuritization Trust, Series 2015-1R, Class 6A1, 1 mo. USD LIBOR + .210%, FRN (a) 0.955% 5/26/47	$	968,832	$	952,921
Washington Mutual Mortgage Pass-Through Certificates, Series 2005-AR13, Class A1A1, 1 mo. USD LIBOR + .290%, FRN 1.272% 10/25/45		1,357,304		1,297,016
Washington Mutual Mortgage Pass-Through Certificates, Series 2005-AR2, Class 2A21, 1 mo. USD LIBOR + .330%, FRN 1.312% 1/25/45		1,285,415		1,230,538
Washington Mutual Mortgage Pass-Through Certificates, Series 2006-1 Class 3A2 5.750% 2/25/36		1,390,829		1,317,427
Wells Fargo Mortgage Backed Securities Trust, Series 2004-DD, Class 2A6, VRN 3.103% 1/25/35		386,928		403,874
Wells Fargo Mortgage Backed Securities Trust, Series 2006-AR8, Class 3A1, VRN 3.175% 4/25/36		1,319,042		1,297,980
				18,055,396
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $58,767,766)				59,763,753
U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES — 28.8%
Pass-Through Securities — 28.8%
Federal Home Loan Mortgage Corp. Pool #G18622 2.500% 12/01/31		1,090,964		1,093,137
Pool #G18626 2.500% 1/01/32		1,050,838		1,052,932
Pool #G18592 3.000% 3/01/31		746,800		767,162
Pool #G18627 3.000% 1/01/32		2,153,879		2,211,259
Pool #G08710 3.000% 6/01/46		450,120		446,463
Pool #G08715 3.000% 8/01/46		3,427,328		3,399,481
Pool #G08726 3.000% 10/01/46		3,276,227		3,248,584
Pool #G08732 3.000% 11/01/46		1,145,413		1,135,749

The accompanying notes are an integral part of the portfolio of investments.

71

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

	Principal Amount		Value
Pool #G08737 3.000% 12/01/46	$	409,915	$	406,456
Pool #G08741 3.000% 1/01/47		2,805,235		2,781,566
Pool #G08747 3.000% 2/01/47		800,524		793,770
Pool #G07848 3.500% 4/01/44		3,101,987		3,205,346
Pool #G60023 3.500% 4/01/45		3,238,638		3,335,923
Pool #G08698 3.500% 3/01/46		4,478,894		4,584,743
Pool #G08702 3.500% 4/01/46		1,264,326		1,294,206
Pool #G08706 3.500% 5/01/46		554,266		567,365
Pool #G08711 3.500% 6/01/46		1,915,603		1,960,275
Pool #G67700 3.500% 8/01/46		956,787		984,033
Pool #G08716 3.500% 8/01/46		2,648,576		2,710,341
Pool #G08722 3.500% 9/01/46		532,128		544,538
Pool #G08742 3.500% 1/01/47		1,784,035		1,825,918
Pool #G08677 4.000% 11/01/45		1,708,726		1,792,694
Pool #G60344 4.000% 12/01/45		2,167,104		2,291,204
Pool #G08707 4.000% 5/01/46		2,169,722		2,276,344
Federal Home Loan Mortgage Corp. TBA, Pool #2789 4.000% 4/01/43 (b)		1,000,000		1,048,984
Federal National Mortgage Association Pool #AM0359 2.310% 8/01/22		500,000		498,812
Pool #AM0992 2.340% 11/01/22		820,000		817,865
Pool #AM1402 2.420% 11/01/22		945,000		946,540
Pool #MA2740 2.500% 9/01/26		1,818,442		1,844,795
Pool #AM0827 2.600% 11/01/22		994,015		1,005,429
Pool #AM2808 2.700% 3/01/23		375,000		380,455
Pool #AN1089 2.740% 3/01/26		690,000		681,845
Pool #AL6829 2.964% 5/01/27		1,365,765		1,364,538

	Principal Amount		Value
Pool #MA2915 3.000% 2/01/27	$	1,153,823	$	1,188,528
Pool #MA1607 3.000% 10/01/33		883,086		901,886
Pool #AM9188 3.120% 6/01/35		780,000		755,656
Pool #FN0039 3.201% 9/01/27		826,233		839,557
Pool #AN4431 3.220% 1/01/27		805,000		819,349
Pool #AB4262 3.500% 1/01/32		974,775		1,018,069
Pool #MA1512 3.500% 7/01/33		430,455		448,632
Pool #MA1148 3.500% 8/01/42		2,969,357		3,039,068
Pool #469621 3.650% 11/01/21		1,588,115		1,671,210
Pool #AM4109 3.850% 8/01/25		421,513		449,201
Pool #AM4108 3.850% 8/01/25		378,888		403,776
Pool #466960 3.890% 12/01/20		1,134,740		1,197,015
Pool #466919 3.930% 1/01/21		1,469,769		1,553,334
Pool #AM4236 3.940% 8/01/25		627,593		672,378
Pool #468551 3.980% 7/01/21		1,230,000		1,310,120
Pool #AL9549 4.000% 9/01/46		1,141,869		1,197,981
Pool #AL9027 4.000% 9/01/46		2,403,146		2,521,238
Pool #AM5165 4.080% 1/01/29		650,604		701,457
Pool #931504 4.500% 7/01/39		125,125		135,638
Pool #986268 5.000% 7/01/38		2,099		2,301
Pool #AD6374 5.000% 5/01/40		41,650		45,645
Pool #AI2733 5.000% 5/01/41		351,586		385,193
Pool #977014 5.500% 5/01/38		46,895		52,854
Pool #985524 5.500% 6/01/38		42,011		47,047
Pool #988578 5.500% 8/01/38		309,349		346,531
Pool #995482 5.500% 1/01/39		215,150		242,489

The accompanying notes are an integral part of the portfolio of investments.

72

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

	Principal Amount		Value
Federal National Mortgage Association TBA Pool #6237 3.000% 6/01/44 (b)	$	2,090,000	$	2,072,366
Pool #1058 3.500% 2/01/44 (b)		5,375,000		5,498,457
Pool #11192 4.000% 3/01/43 (b)		3,965,000		4,159,223
Pool #20567 4.500% 10/01/40 (b)		17,460,000		18,724,486
Government National Mortgage Association, Pool #MA3736 3.500% 6/20/46		1,190,128		1,235,827
Government National Mortgage Association II Pool #MA4126 3.000% 12/20/46		2,923,313		2,952,204
Pool #MA3521 3.500% 3/20/46		1,326,637		1,377,577
Pool #MA3597 3.500% 4/20/46		851,761		884,467
Pool #MA3663 3.500% 5/20/46		612,941		636,477
Pool #MA3937 3.500% 9/20/46		481,685		500,181
Pool #MA4127 3.500% 12/20/46		1,587,839		1,648,437
Government National Mortgage Association II TBA Pool #587 3.000% 2/01/45 (b)		2,020,000		2,037,991
Pool #304 3.500% 9/01/44 (b)		1,905,000		1,975,396
Pool #1235 4.000% 1/01/44 (b)		1,935,000		2,043,995
				120,991,989
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $122,115,827)				120,991,989
U.S. TREASURY OBLIGATIONS — 30.3%
U.S. Treasury Bonds & Notes — 30.3%
U.S. Treasury Bond 2.875% 11/15/46		3,905,000		3,790,047
U.S. Treasury Bond 3.000% 2/15/47		15,390,000		15,338,299
U.S. Treasury Inflation Index 0.375% 7/15/25		4,133,202		4,143,766
U.S. Treasury Inflation Index 0.750% 2/15/45		3,196,255		3,042,605

	Principal Amount		Value
U.S. Treasury Note 0.750% 10/31/17	$	6,115,000	$	6,108,073
U.S. Treasury Note 1.000% 12/31/17		3,475,000		3,474,579
U.S. Treasury Note 1.125% 2/28/19		12,275,000		12,247,333
U.S. Treasury Note 1.250% 3/31/19		12,265,000		12,263,083
U.S. Treasury Note 1.500% 1/31/22		8,885,000		8,710,215
U.S. Treasury Note 1.875% 1/31/22		3,625,000		3,617,382
U.S. Treasury Note 1.875% 2/28/22		27,070,000		27,013,746
U.S. Treasury Note 1.875% 3/31/22		7,065,000		7,047,337
U.S. Treasury Note 2.250% 2/15/27		20,600,000		20,339,282
				127,135,747
TOTAL U.S. TREASURY OBLIGATIONS (Cost $126,883,567)				127,135,747
TOTAL BONDS & NOTES (Cost $419,533,604)				419,635,171
TOTAL LONG-TERM INVESTMENTS (Cost $419,533,604)				419,635,171
SHORT-TERM INVESTMENTS — 7.8%
Repurchase Agreement — 1.7%
State Street Bank & Trust Co. Repurchase Agreement, dated 3/31/17, 0.050%, due 4/03/17 (c)		7,111,494		7,111,494
Sovereign Debt Obligations — 3.9%
Japan Treasury Discount Bill JPY (d) 0.000% 4/17/17		600,000,000		5,389,679
Japan Treasury Discount Bill JPY (d) 0.000% 5/01/17		700,000,000		6,288,664
Japan Treasury Discount Bill JPY (d) 0.000% 6/19/17		520,000,000		4,673,059
				16,351,402
Time Deposit — 0.0%
Euro Time Deposit 0.090% 4/03/17		5,381		5,381
U.S. Treasury Bill — 2.2%
U.S. Treasury Bill (e) 0.473% 4/06/17		248,000		247,987
U.S. Treasury Bill 0.500% 4/27/17		5,725,000		5,722,212

The accompanying notes are an integral part of the portfolio of investments.

73

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

	Principal Amount		Value
U.S. Treasury Bill 0.710% 4/20/17	$	3,400,000	$	3,398,830
				9,369,029
TOTAL SHORT-TERM INVESTMENTS (Cost $32,474,837)				32,837,306
TOTAL INVESTMENTS — 107.7% (Cost $452,008,441) (f)				452,472,477
Other Assets/(Liabilities) — (7.7)%				(32,314,296	)
NET ASSETS — 100.0%			$	420,158,181

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

ABS Asset-Backed 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

TBA To Be Announced

VRN Variable Rate Note

WL Whole Loan

(a) Securities exempt from registration under rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At March 31, 2017, these securities amounted to a value of $36,057,885 or 8.58% of net assets.

(b) A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis. (Note 2).

(c) Maturity value of $7,111,523. Collateralized by U.S. Government Agency obligations with a rate of 1.000%, maturity date of 5/15/18, and an aggregate market value, including accrued interest, of $7,257,050.

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

(e) A portion of this security is pledged/held as collateral for open futures contracts. (Note 2).

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

The accompanying notes are an integral part of the portfolio of investments.

74

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MML Series Investment Fund (the ‘‘Trust’’) is registered under the Investment Company Act of 1940, as amended (the ‘‘1940 Act’’), as a no-load, open-end, management investment company. The Trust is organized under the laws of the Commonwealth of Massachusetts as a Massachusetts business trust pursuant to an Agreement and Declaration of Trust dated December 19, 1984, as restated May 14, 1993, and further amended and restated as of December 15, 2011, as it may be further amended from time to time. The Trust consists of the following series (each individually referred to as a ‘‘Fund’’ or collectively as the ‘‘Funds’’):

MML Aggressive Allocation Fund (“Aggressive Allocation Fund”)

MML American Funds Core Allocation Fund (“MML American Funds Core Allocation Fund”)

MML American Funds^® Growth Fund (“MML American Funds Growth Fund”)

MML American Funds^® International Fund (“MML American Funds International Fund”)

MML Balanced Allocation Fund (“Balanced Allocation Fund”)

MML Blue Chip Growth Fund (“Blue Chip Growth Fund”)

MML Conservative Allocation Fund (“Conservative Allocation Fund”)

MML Equity Income Fund (“Equity Income Fund”)

MML Equity Index Fund (“Equity Index Fund”)

MML Focused Equity Fund (“Focused Equity Fund”)

MML Foreign Fund (“Foreign Fund”)

MML Fundamental Growth Fund (“Fundamental Growth Fund”)

MML Fundamental Value Fund (“Fundamental Value Fund”)

MML Global Fund (“Global Fund”)

MML Growth Allocation Fund (“Growth Allocation Fund”)

MML Growth & Income Fund (“Growth & Income Fund”)

MML Income & Growth Fund (“Income & Growth Fund”)

MML International Equity Fund (“International Equity Fund”)

MML Large Cap Growth Fund (“Large Cap Growth Fund”)

MML Managed Volatility Fund (“Managed Volatility Fund”)

MML Mid Cap Growth Fund (“Mid Cap Growth Fund”)

MML Mid Cap Value Fund (“Mid Cap Value Fund”)

MML Moderate Allocation Fund (“Moderate Allocation Fund”)

MML Small Cap Growth Equity Fund (“Small Cap Growth Equity Fund”)

MML Small Company Value Fund (“Small Company Value Fund”)

MML Small/Mid Cap Value Fund (“Small/Mid Cap Value Fund”)

MML Total Return Bond Fund (“Total Return Bond Fund”)

The Trust makes shares of the Funds available for the investment of assets of various separate investment accounts established by Massachusetts Mutual Life Insurance Company (“MassMutual”) and by life insurance companies which are subsidiaries of MassMutual. Shares of the Trust are not offered to the general public. MassMutual, MML Bay State Life Insurance Company, C.M. Life Insurance Company, and the MML Allocation Funds, which are “funds of funds” series of the Trust, are the record owners of all of the outstanding shares of the Funds.

Each share class of a Fund represents an interest in the same portfolio of assets. The principal difference among the classes is the level of service and administration fees, and shareholder and distribution service expenses borne by the classes. Because each class will have different fees and expenses, performance and share prices will vary between the classes. The classes of shares are offered to different types of investors, as outlined in the Funds’ Prospectus.

2. Significant Accounting Policies

The following is a summary of significant accounting policies followed consistently by each Fund in the preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America (“generally accepted accounting principles”). The preparation of the financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates.

75

Notes to Portfolio of Investments (Unaudited) (Continued)

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 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.

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 Board of Trustees (“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

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

76

Notes to Portfolio of Investments (Unaudited) (Continued)

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.

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

The types of assets and liabilities categorized in Level 1 generally include actively traded domestic and certain foreign equity securities, derivatives actively traded on a national securities exchange (such as some warrants, rights, futures, and options), and shares of open-end mutual funds.

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

The types of assets and liabilities categorized in Level 2 generally include debt securities such as U.S. Government and agency securities, mortgage-backed securities, asset-backed securities, municipal obligations, sovereign debt obligations, bank loans, corporate bonds, and those securities valued at amortized cost; OTC derivatives such as swaps, options, swaptions, and forward foreign currency exchange contracts; certain restricted securities; and non-exchange traded equity securities and certain foreign equity securities traded on particular foreign exchanges that close before the Funds determine their net asset values.

Level 3 – significant unobservable inputs (including the Funds’ own assumptions in determining the fair value of investments)

The types of assets and liabilities categorized in Level 3 generally include securities for which prices, spreads, or any of the other aforementioned significant inputs are unobservable. Generally, securities whose trading has been suspended or that have been de-listed from their current primary trading exchange; securities in default or bankruptcy proceedings for which there is no current market quotation; securities and certain derivatives valued by broker quotes which may include brokers’ assumptions; and any illiquid Rule 144A securities or restricted securities issued by non-public entities are categorized in Level 3.

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 Level 1, Level 2, or Level 3.

77

Notes to Portfolio of Investments (Unaudited) (Continued)

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 Aggressive Allocation Fund, MML American Funds Core Allocation Fund, MML American Funds Growth Fund, MML American Funds International Fund, Balanced Allocation Fund, Conservative Allocation Fund, Growth Allocation Fund, and Moderate Allocation Fund characterized all long-term investments at Level 1 as of March 31, 2017. The Focused Equity Fund, Small Company Value Fund, and Small/Mid Cap Value Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of March 31, 2017. For each Fund noted in the preceding sentences, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

The following is the aggregate value by input level, as of March 31, 2017, for the remaining Funds’ investments:

	Level 1			Level 2		Level 3		Total
Blue Chip Growth Fund
Asset Investments
Common Stock*	$	359,606,651		$	6,137,112	$	-	$	365,743,763
Mutual Funds		1,006			-		-		1,006
Short-Term Investments		-			2,513,029		-		2,513,029
Total Investments	$	359,607,657		$	8,650,141	$	-	$	368,257,798
Equity Income Fund
Asset Investments
Common Stock*	$	448,142,523		$	18,841,302	$	-	$	466,983,825
Preferred Stock*		4,135,487			1,452,483		-		5,587,970
Corporate Debt		-			819,231		-		819,231
Mutual Funds		1,007			-		-		1,007
Short-Term Investments		-			8,505,367		-		8,505,367
Total Investments	$	452,279,017		$	29,618,383	$	-	$	481,897,400
Equity Index Fund
Asset Investments
Common Stock	$	674,126,955		$	-	$	-	$	674,126,955
Short-Term Investments		-			11,390,418		-		11,390,418
Total Investments	$	674,126,955		$	11,390,418	$	-	$	685,517,373
Liability Derivatives
Futures Contracts	$	(69,956	)	$	-	$	-	$	(69,956	)
Foreign Fund
Asset Investments
Common Stock*
Bermuda	$	-		$	1,576,206	$	-	$	1,576,206
Brazil		1,868,829			-		-		1,868,829
Canada		2,004,513			-		-		2,004,513
Cayman Islands		3,462,477			7,058,254		-		10,520,731
China		-			12,195,613		-		12,195,613
France		-			38,632,697		-		38,632,697
Germany		2,892,873			45,996,110		-		48,888,983
Hong Kong		-			7,265,704		-		7,265,704
Ireland		-			5,668,202		-		5,668,202

78

Notes to Portfolio of Investments (Unaudited) (Continued)

	Level 1		Level 2			Level 3		Total
Foreign Fund (Continued)
Asset Investments (Continued)
Common Stock* (Continued)
Israel	$	5,513,030	$	-		$	-	$	5,513,030
Italy		-		6,085,389			-		6,085,389
Japan		-		38,955,863			-		38,955,863
Netherlands		-		18,920,099			-		18,920,099
Norway		-		7,090,188			-		7,090,188
Portugal		-		3,680,582			-		3,680,582
Republic of Korea		3,557,877		19,723,529			-		23,281,406
Singapore		-		13,603,628			-		13,603,628
Spain		4,835,635		-			-		4,835,635
Sweden		-		2,249,381			-		2,249,381
Switzerland		-		22,256,402			-		22,256,402
Taiwan		-		4,024,272			-		4,024,272
Thailand		-		4,287,347			-		4,287,347
United Kingdom		7,990,030		67,518,871			-		75,508,901
Mutual Funds		5,133,274		-			-		5,133,274
Short-Term Investments		-		12,374,173			-		12,374,173
Total Investments	$	37,258,538	$	339,162,510		$	-	$	376,421,048
Fundamental Growth Fund
Asset Investments
Common Stock*	$	164,038,696	$	834,674	*	$	-	$	164,873,370
Short-Term Investments		-		402,271			-		402,271
Total Investments	$	164,038,696	$	1,236,945		$	-	$	165,275,641
Fundamental Value Fund
Asset Investments
Common Stock*	$	207,225,730	$	5,463,096	*	$	-	$	212,688,826
Short-Term Investments		-		2,850,757			-		2,850,757
Total Investments	$	207,225,730	$	8,313,853		$	-	$	215,539,583
Global Fund
Asset Investments
Common Stock*
Austria	$	-	$	1,080,060		$	-	$	1,080,060
Brazil		-		1,420,647			-		1,420,647
Canada		4,385,084		-			-		4,385,084
Cayman Islands		-		527,638			-		527,638
Czech Republic		-		319,401			-		319,401
Denmark		-		2,837,296			-		2,837,296
France		-		19,883,018			-		19,883,018
Germany		-		15,320,648			-		15,320,648
Ireland		11,420,122		-			-		11,420,122
Israel		2,622,758		-			-		2,622,758
Japan		-		3,044,469			-		3,044,469
Mexico		853,207		-			-		853,207
Netherlands		2,137,831		5,397,464			-		7,535,295
Republic of Korea		-		2,213,773			-		2,213,773
Spain		-		1,672,648			-		1,672,648

79

Notes to Portfolio of Investments (Unaudited) (Continued)

	Level 1		Level 2			Level 3		Total
Global Fund (Continued)
Asset Investments (Continued)
Common Stock* (Continued)
Sweden	$	-	$	5,152,296		$	-	$	5,152,296
Switzerland		-		22,123,648			-		22,123,648
Thailand		-		556,937			-		556,937
United Kingdom		1,547,501		22,911,218			-		24,458,719
United States		121,152,981		-			-		121,152,981
Mutual Funds		4,829,717		-			-		4,829,717
Short-Term Investments		-		2,252,511			-		2,252,511
Total Investments	$	148,949,201	$	106,713,672		$	-	$	255,662,873
Growth & Income Fund
Asset Investments
Common Stock*	$	124,286,557	$	6,344,270	*	$	-	$	130,630,827
Short-Term Investments		-		947,342			-		947,342
Total Investments	$	124,286,557	$	7,291,612		$	-	$	131,578,169
Income & Growth Fund
Asset Investments
Common Stock*	$	246,464,820	$	20,097,781	*	$	-	$	266,562,601
Short-Term Investments		-		11,898,539			-		11,898,539
Total Investments	$	246,464,820	$	31,996,320		$	-	$	278,461,140
International Equity Fund
Asset Investments
Common Stock*
Australia	$	-	$	5,544,018		$	-	$	5,544,018
Cayman Islands		4,746,189		-			-		4,746,189
Denmark		-		5,280,413			-		5,280,413
France		-		25,984,876			-		25,984,876
Germany		-		11,894,139			-		11,894,139
India		1,851,760		-			-		1,851,760
Indonesia		-		3,157,634			-		3,157,634
Ireland		3,194,894		-			-		3,194,894
Israel		143,724		-			-		143,724
Italy		-		7,367,510			-		7,367,510
Japan		-		12,350,262			-		12,350,262
Mexico		3,530,434		-			-		3,530,434
Netherlands		-		12,996,749			-		12,996,749
Republic of Korea		-		1,353,680			-		1,353,680
Sweden		-		10,045,318			-		10,045,318
Switzerland		-		18,412,046			-		18,412,046
Taiwan		-		458,106			-		458,106
United Kingdom		-		30,034,078			-		30,034,078
Mutual Funds		3,489,010		-			-		3,489,010
Short-Term Investments		-		6,542,610			-		6,542,610
Total Investments	$	16,956,011	$	151,421,439		$	-	$	168,377,450
Liability Derivatives
Forward Contracts	$	-	$	(39,207	)	$	-	$	(39,207	)

80

Notes to Portfolio of Investments (Unaudited) (Continued)

	Level 1			Level 2			Level 3			Total
Large Cap Growth Fund
Asset Investments
Common Stock	$	105,128,945		$	3,474,768		$	-		$	108,603,713
Short-Term Investments		-			867,142			-			867,142
Total Investments	$	105,128,945		$	4,341,910		$	-		$	109,470,855
Managed Volatility Fund
Asset Investments
Common Stock	$	182,785,994		$	-		$	-		$	182,785,994
Corporate Debt		-			-			-	+**		-
Purchased Options		490,190			-			-			490,190
Short-Term Investments		-			2,156,100			-			2,156,100
Total Investments	$	183,276,184		$	2,156,100		$	-		$	185,432,284
Liability Derivatives
Written Options	$	(2,378,084	)	$	-		$	-		$	(2,378,084	)
Mid Cap Growth Fund
Asset Investments
Common Stock	$	422,223,645		$	-		$	1,051,414	**	$	423,275,059
Preferred Stock		-			-			2,736,974	**		2,736,974
Mutual Funds		24,989,615			-			-			24,989,615
Short-Term Investments		-			18,704,677			-			18,704,677
Total Investments	$	447,213,260		$	18,704,677		$	3,788,388		$	469,706,325
Mid Cap Value Fund
Asset Investments
Common Stock*	$	447,400,519		$	5,463,448	*	$	-		$	452,863,967
Mutual Funds		10,464,873			-			-			10,464,873
Short-Term Investments		-			9,781,932			-			9,781,932
Total Investments	$	457,865,392		$	15,245,380		$	-		$	473,110,772
Asset Derivatives
Forward Contracts	$	-		$	107,372		$	-		$	107,372
Liability Derivatives
Forward Contracts	$	-		$	(41,936	)	$	-		$	(41,936	)
Small Cap Growth Equity Fund
Asset Investments
Common Stock*	$	199,386,518		$	1,357,142	*	$	434,678		$	201,178,338
Preferred Stock*		-			-			1,958,509			1,958,509
Mutual Funds		28,606,952			-			-			28,606,952
Short-Term Investments		-			1,072,218			-			1,072,218
Total Investments	$	227,993,470		$	2,429,360		$	2,393,187		$	232,816,017
Total Return Bond Fund
Asset Investments
Bank Loans	$	-		$	848,610		$	-		$	848,610
Corporate Debt		-			105,783,756			-			105,783,756
Municipal Obligations		-			5,111,316			-			5,111,316
Non-U.S. Government Agency Obligations		-			59,763,753			-			59,763,753

81

Notes to Portfolio of Investments (Unaudited) (Continued)

	Level 1		Level 2			Level 3		Total
Total Return Bond Fund (Continued)
Asset Investments (Continued)
U.S. Government Agency Obligations and Instrumentalities	$	-	$	120,991,989		$	-	$	120,991,989
U.S. Treasury Obligations		-		127,135,747			-		127,135,747
Short-Term Investments		-		32,837,306			-		32,837,306
Total Investments	$	-	$	452,472,477		$	-	$	452,472,477
Asset Derivatives
Futures Contracts	$	65,309	$	-		$	-	$	65,309
Liability Derivatives
Forward Contracts	$	-	$	(378,444	)	$	-	$	(378,444	)

* 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 applicable foreign markets.

** None of the unobservable inputs for Level 3 assets, individually or collectively, had a material impact on the Fund(s). Level 3 investments at the beginning and/or end of the period in relation to net assets were not significant and accordingly, a reconciliation of Level 3 assets for the period ended March 31, 2017 is not presented.

+ Represents a security at $0 value as of March 31, 2017.

The Fund(s) had no transfers between Level 1, Level 2 and Level 3 of the fair value hierarchy at March 31, 2017. The Fund(s) recognize transfers between the Levels as of the beginning of the year.

Following is a reconciliation of investments for which significant unobservable inputs (Level 3) were used in determining value:

Asset Valuation Inputs

	Investments in Securities
	Balance as of 12/31/16		Accrued Discounts (Premiums)		Realized Gain (Loss)		Change in Unrealized Appreciation (Depreciation)		Purchases		(Sales)			Transfers into Level 3*		Transfers (out) of Level 3*		Balance as of 3/31/17		Net Change in Unrealized Appreciation (Depreciation) from Investments Still Held as of 3/31/17
Small Cap Growth Equity Fund
Common Stock	$	431,128	$	-	$	-	$	3,550	$	-	$	-		$	-	$	-	$	434,678	$	3,550
Preferred Stock		1,879,253		-		38,951		184,341		-		(144,036	)		-		-		1,958,509		187,112
	$	2,310,381	$	-	$	38,951	$	187,891	$	-	$	(144,036	)	$	-	$	-	$	2,393,187	$	190,662

* The Fund recognizes transfers between the Levels as of the beginning of the year.

The Small Cap Growth Equity Fund fair values certain of its Level 3 investments using acquisition cost, although the transaction may not have occurred during the current reporting period. These investments are generally privately held investments, but may include defaulted securities and new debt issuances. There may not be a secondary market, and/or there are a limited number of investors. The determination to fair value such investments at cost is based upon factors consistent with the principles of fair value measurement that are reasonably available to the Valuation Committee. Valuations are reviewed utilizing available market information to determine if the carrying value should be adjusted. Such market data may include, but is not limited to, observations of the trading multiples of public companies considered comparable to the private companies being valued, financial or operational information released by the company, and/or news or corporate events that affect the investment, also referred to as enterprise value (EV) to earnings before interest, taxes, depreciation and amortization (EBITDA) ratios. Valuations may be adjusted to account for company-specific issues, the lack of liquidity inherent in a nonpublic investment and the fact that comparable public

82

Notes to Portfolio of Investments (Unaudited) (Continued)

companies are not identical to the investments being fair valued by the Small Cap Growth Equity Fund. All market variables are assessed on a regular frequency and calibrated as necessary.

	Fair Value Amount		Valuation Technique	Unobservable Input Description	Value/ Weighted Average Range
Small Cap Growth Equity
Common stock — $434,678
Dropbox, Inc.	$	108,145	Market Approach	EV/Multiple		6.30x
				Discount for Lack of Marketability		10%
Telogis		255,573	Market Approach	Future Cash Distribution		$3.18
Centennial Resource Development, Inc.		70,960	Market Approach	Parity to Underlying Security Discount for Lack of Marketability		$17.26 10%
Docusign, Inc. Series E		-	Worthless	Worthless		$0.00
Preferred stock — $1,958,509
Cloudera Inc. Series F	$	251,618	Market Approach	EV/Multiple		6.40x
				Discount for Lack of Marketability		10%
Draftkings, Inc. Series D		40,144	Market Approach	Probability Expected Weighted Return Model
Draftkings, Inc. Series D1		93,418		Merger Probability No Merger Probability		50% 50%
Marklogic Corp. Series F		241,602	Market Approach	EV/Multiple		3.60x
				Discount for Lack of Marketability		10%
Telogis		481,843	Market Approach	Future Cash Distribution		$4.40
The Honest Company Series D		141,066	Market Approach	EV/Multiple		4.03x
				Discount for Lack of Marketability		10%
Veracode, Inc. Series 8		412,984	Market Approach	Future Cash Distribution		$38.64
Zuora, Inc., Series F		295,834	Market Approach	EV/Multiple		6.10x
				Discount for Lack of Marketability		10%
Total	$	2,393,187

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. Gains or losses from derivatives can be substantially greater than their 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. For those Funds that held derivatives at March 31, 2017, the following table shows how the Fund used these types of derivatives during the period (marked with an “A”), as well as additional uses, if any, it may have for them in the future (marked with an “M”).

Type of Derivative and Objective for Use	Equity Index	International Equity	Managed Volatility	Mid Cap Value	Total Return Bond
Foreign Currency Transactions*
Hedging/Risk Management		A		A	A
Directional Exposures to Currencies					M
Futures Contracts**
Hedging/Risk Management					A
Duration/Credit Quality Management					A
Substitution for Direct Investment	A				M

83

Notes to Portfolio of Investments (Unaudited) (Continued)

Type of Derivative and Objective for Use	Equity Index	International Equity	Managed Volatility	Mid Cap Value	Total Return Bond
Options (Purchased)
Hedging/Risk Management			A
Options (Written)
Hedging/Risk Management			A
Income			A

* Includes any options purchased or written, futures contracts, forward contracts, and swap agreements, if applicable.

** Includes any options purchased or written on futures contracts, if applicable.

At March 31, 2017, the Fund(s) had the following derivatives and transactions in derivatives, grouped into the indicated risk categories:

	Equity Risk			Foreign Exchange Risk			Interest Rate Risk		Total
Equity Index Fund
Liability Derivatives
Futures Contracts	$	(69,956	)	$	-		$	-	$	(69,956	)
International Equity Fund
Liability Derivatives
Forward Contracts	$	-		$	(39,207	)	$	-	$	(39,207	)
Managed Volatility Fund
Asset Derivatives
Purchased Options	$	490,190		$	-		$	-	$	490,190
Liability Derivatives
Written Options	$	(2,378,084	)	$	-		$	-	$	(2,378,084	)
Mid Cap Value Fund
Asset Derivatives
Forward Contracts	$	-		$	107,372		$	-	$	107,372
Liability Derivatives
Forward Contracts	$	-		$	(41,936	)	$	-	$	(41,936	)
Total Return Bond Fund
Asset Derivatives
Futures Contracts	$	-		$	-		$	65,309	$	65,309
Liability Derivatives
Forward Contracts	$	-		$	(378,444	)	$	-	$	(378,444	)

84

Notes to Portfolio of Investments (Unaudited) (Continued)

At March 31, 2017, the number of contracts, notional amounts, or shares/units for each derivative type was as follows:

	Number of Contracts, Notional Amounts or Shares/Units†
Fund Name	Futures Contracts		Forward Contracts		Purchased Options		Written Options
Equity Index Fund		102	$	-		-		-
International Equity Fund		-		2,398,942		-		-
Managed Volatility Fund		-		-		771		771
Mid Cap Value Fund		-		14,540,729		-		-
Total Return Bond Fund		284		15,991,507		-		-

† Amount(s) disclosed represent number of contracts for futures contracts, notional amounts for forward contracts, and shares/units outstanding for purchased options and written options at March 31, 2017.

Further details regarding the derivatives and other investments held by the Fund(s) at March 31, 2017, are discussed below.

Foreign Currency Exchange Transactions

A Fund may engage in foreign currency exchange transactions for hedging purposes in order to protect against uncertainty in the level of future foreign currency exchange rates, or for other, non-hedging purposes.

A Fund may enter into foreign currency exchange transactions, including foreign currency forward contracts. These contracts call for the Fund to deliver in the future an amount of one currency in return for an amount of another currency, at an exchange rate determined at the time the contract is entered into. Forward contracts are private contractual arrangements and a Fund is subject to the risk that its counterparty will not, or will not be able to, perform its obligations. This type of arrangement may require the Fund to post margin. A Fund may enter into foreign currency exchange transactions in order to hedge against changes in the values of the assets or liabilities denominated in one or more foreign currencies, or otherwise to increase or reduce a Fund’s exposure to various foreign currencies. The use of foreign currency exchange transactions may create investment leverage.

Whenever a Fund enters into a foreign currency exchange transaction, it is subject to the risk that the value of the transaction will move in a direction unfavorable to it. When the Fund uses the transactions for hedging purposes, it is likely that the Fund will have an asset or liability that will offset any loss (or gain) on the transactions, at least in part. If a Fund enters into foreign currency exchange transactions other than for hedging purposes (for example, seeking to profit from an anticipated change in the values of currencies by creating directional exposures in the portfolio with respect to one or more currencies), it will generally be subject to the same risks, but is less likely to have assets or liabilities that will offset any losses on the transactions. There can be no assurance that a Fund will be able to terminate any foreign currency exchange transaction prior to its maturity in order to limit its loss on the transaction.

Forward foreign currency contracts are marked to market daily and the change in their value is recorded by the Funds as an unrealized gain or loss. Forward foreign currency contracts are valued at the settlement price established through dealers or other market sources on the day which they are traded. When a forward foreign currency contract is extinguished, through delivery or offset by entering into another forward foreign currency contract, the Funds record a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value of the contract at the time it was extinguished or offset. The notional or contractual amounts of these instruments do not necessarily represent the amounts potentially subject to risk. The measurement of the risk associated with these instruments is meaningful only when all related and offsetting transactions and counterparty risks are considered.

85

Notes to Portfolio of Investments (Unaudited) (Continued)

The Fund(s) listed in the following table had open forward foreign currency contracts at March 31, 2017. A Fund’s current exposure to a counterparty is the unrealized appreciation on the contract.

		Counterparty	Settlement Date	In Exchange for		Unrealized Appreciation/ (Depreciation)
International Equity Fund
Contracts to Deliver
AUD	790,000	State Street Bank and Trust	06/21/17	$	577,556	$	(25,147	)
CHF	1,819,000	State Street Bank and Trust	09/20/17		1,821,386		(14,060	)
				$	2,398,942	$	(39,207	)
Mid Cap Value Fund
Contract to Buy
EUR	122,765	UBS AG	06/30/17	$	131,748	$	(236	)
Contracts to Deliver
JPY	291,853,307	Credit Suisse International	06/30/17	$	2,655,904	$	25,304
CAD	9,215,788	Morgan Stanley & Co.	06/30/17		6,896,629		(41,700	)
EUR	4,456,847	UBS AG	06/30/17		4,856,448		82,068
				$	14,408,981	$	65,672
Total Return Bond Fund
Contracts to Deliver
JPY	520,000,000	Bank of America N.A.	06/19/17	$	4,606,662	$	(77,852	)
JPY	700,000,000	Citibank N.A.	05/01/17		6,108,682		(184,972	)
JPY	600,000,000	JPMorgan Chase Bank N.A.	04/17/17		5,276,163		(115,620	)
				$	15,991,507	$	(378,444	)

AUD Australian Dollar

CAD Canadian Dollar

CHF Swiss Franc

EUR Euro

JPY Japanese Yen

Futures Contracts

A Fund may seek to manage a variety of different risks, such as interest rate risk, equity price risk, and currency risk, through the use of futures contracts. A Fund may use interest rate futures contracts to adjust the interest rate sensitivity (duration) of its portfolio or the credit exposure of the portfolio. Interest rate futures contracts obligate the long or short holder to take or make delivery of a specified quantity of a financial instrument, such as a specific fixed-income security, during a specified future period at a specified price. A Fund may use index futures to hedge against broad market risks to its portfolio or to gain broad market exposure when it holds uninvested cash or as an inexpensive substitute for cash investments directly in securities or other assets. Securities index futures contracts are contracts to buy or sell units of a securities index at a specified future date at a price agreed upon when the contract is made and are settled in cash. Positions in futures may be closed out only on an exchange or board of trade which provides a secondary market for such futures. Because futures contracts are exchange-traded, they typically have minimal exposure to counterparty risk.

Parties to a futures contract are not required to post the entire notional amount of the contract, but rather a small percentage of that amount (by way of margin), both at the time they enter into futures transactions, and then on a daily basis if their positions decline in value; as a result, futures contracts are highly leveraged. Such payments are known as variation margin and are recorded by the Funds as unrealized gains or losses. Because futures markets are highly leveraged, they can be extremely volatile, and there can be no assurance that the pricing of a futures contract will correlate precisely with the pricing of the asset or index underlying it or the

86

Notes to Portfolio of Investments (Unaudited) (Continued)

asset or liability of the Fund that is the subject of the hedge. It may not always be possible for a Fund to enter into a closing transaction with respect to a futures contract it has entered into, at a favorable time or price. When a Fund enters into a futures transaction, it is subject to the risk that the value of the futures contract will move in a direction unfavorable to it. When a Fund uses futures contracts for hedging purposes, it is likely that the Fund will have an asset or liability that will offset any loss (or gain) on the transactions, at least in part.

When a futures contract is closed, the Fund records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. Futures contracts are valued at the settlement price established each day by the board of trade or exchange on which they are traded.

The Fund(s) listed in the following table had open futures contracts at March 31, 2017:

	Expiration Date	Number of Contracts		Notional Amount		Net Unrealized Appreciation/ (Depreciation)
Equity Index Fund
Futures Contracts — Long
S&P 500 E Mini Index	06/16/17		102	$	12,031,920	$	(69,956	)
Total Return Bond Fund
Futures Contracts — Long
U.S. Treasury Note 2 Year	06/30/17		84	$	18,182,062	$	14,931
U.S. Treasury Note 5 Year	06/30/17		200		23,545,313		50,378
						$	65,309

Options

A Fund may purchase and sell put and call options on securities or an index of securities to enhance investment performance or to protect against changes in market prices. A Fund that invests in debt securities may also purchase and sell put and call options to adjust the interest rate sensitivity of its portfolio or the credit exposure of the portfolio.

Call Options. A call option gives the holder the right to purchase, and obligates the writer to sell, a security at the strike price at any time before the expiration date.

Put Options. A put option gives the holder the right to sell, and obligates the writer to buy, a security at the exercise price at any time before the expiration date.

Writing put and call options. A Fund may write call options on a security it owns, in a “directional” strategy hoping to realize a greater current return through the receipt of premiums. In return for the option premium, the Fund takes the risk that it will have to forego any increase in the value of the security over the strike price. When a Fund has written a call option on a security it does not own, its exposure on such an option is theoretically unlimited. A Fund may enter into closing purchase transactions in order to realize a profit or limit a loss on a previously written call option or, in the case of a call option on a security it owns, to free itself to sell the underlying security or to write another call on the security, or protect a security from being called in an unexpected market rise. Any profits from a closing purchase transaction in the case of a call option on a security a Fund owns may be offset by a decline in the value of the underlying security. Conversely, because increases in the market price of a call option will generally reflect increases in the market price of the underlying security, any loss resulting from a closing purchase transaction relating to a call option on a security a Fund owns is likely to be offset in whole or in part by unrealized appreciation of the underlying security owned by the Fund. A Fund may not be able to close out a call option that it has previously written. A Fund may write put options in order to enhance its current return by taking a long directional position as to a security or index of securities. By writing a put option, a Fund assumes the risk that it may be required to purchase the underlying security for an exercise price higher than its then current market value, resulting in a potential capital loss unless the security later appreciates in value. A Fund may terminate a put option that it has written before it expires by entering into a closing purchase transaction. Any loss from this transaction may be partially or entirely offset by the premium received on the terminated option. A Fund may not be able to close out a put option that it has previously written.

87

Notes to Portfolio of Investments (Unaudited) (Continued)

When a Fund writes a call or put option, an amount equal to the premium received is recorded as a liability. Premiums received from writing options which expire are treated as realized gains. Premiums received from writing options which are exercised or closed are added to the proceeds or offset against the amount paid on the underlying investment to determine the realized gain or loss.

Purchasing put and call options. A Fund may purchase put options to protect portfolio holdings against a decline in market value of a security or securities held by it. A Fund may also purchase a put option hoping to profit from an anticipated decline in the value of the underlying security. If the Fund holds the security underlying the option, the option premium and any transaction costs will reduce any profit the Fund might have realized had it sold the underlying security instead of buying the put option. A Fund may purchase call options to hedge against an increase in the price of securities that the Fund wants ultimately to buy. A Fund may also purchase a call option as a long directional investment hoping to profit from an anticipated increase in the value of the underlying security. In order for a call option to be profitable, the market price of the underlying security must rise sufficiently above the exercise price to cover the premium and transaction costs. These costs will reduce any profit the Fund might have realized had it bought the underlying security at the time it purchased the call option.

When a Fund purchases an option, it runs the risk that it will lose its entire investment in the option in a relatively short period of time, unless the Fund exercises the option or enters into a closing sale transaction before the option’s expiration. If the price of the underlying security does not rise (in the case of a call) or fall (in the case of a put) to an extent sufficient to cover the option premium and transaction costs, the Fund will lose part or all of its investment in the option. This contrasts with an investment by a Fund in the underlying security, since the Fund will not realize a loss if the security’s price does not change. Premiums paid for purchasing options that expire are treated as realized losses.

Exchange Traded Options. Exchange traded options purchased or sold by a Fund may be traded on a securities or options exchange or market. Such options typically have minimal exposure to counterparty risk. However, an exchange or market may at times find it necessary to impose restrictions on particular types of options transactions, such as opening transactions. If an underlying security ceases to meet qualifications imposed by the market or the Options Clearing Corporation, new series of options on that security will no longer be opened to replace expiring series, and opening transactions in existing series may be prohibited. Exchange traded options are valued at the last sale price, or if no sales are reported, the last bid price.

The Fund(s) listed in the following table had open written option contracts at March 31, 2017:

	Units		Expiration Date		Description	Premiums Received		Value
Managed Volatility Fund
		79		4/07/17	S&P 500 Index Call, Strike 2,350.00	$	132,606	$	144,570
		87		4/21/17	S&P 500 Index Call, Strike 2,300.00		318,046		612,480
		90		4/21/17	S&P 500 Index Call, Strike 2,375.00		269,775		108,000
		89		4/21/17	S&P 500 Index Call, Strike 2,385.00		115,478		74,760
		86		4/21/17	S&P 500 Index Call, Strike 2,400.00		120,185		34,400
		89		4/28/17	S&P 500 Index Call, Strike 2,375.00		176,760		173,550
		85		5/19/17	S&P 500 Index Call, Strike 2,275.00		467,288		893,350
		80		5/19/17	S&P 500 Index Call, Strike 2,375.00		343,800		207,200
		86		5/19/17	S&P 500 Index Call, Strike 2,400.00		360,985		129,774
						$	2,304,923	$	2,378,084

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Notes to Portfolio of Investments (Unaudited) (Continued)

Transactions in written option contracts during the period ended March 31, 2017, were as follows:

	Number of Contracts			Premiums Received
Managed Volatility Fund
Options outstanding at December 31, 2016		804		$	3,199,761
Options written		1,986			5,238,768
Options terminated in closing purchase transactions		(2,019	)		(6,133,606	)
Options expired		-			-
Options exercised		-			-
Options outstanding at March 31, 2017		771		$	2,304,923

Inflation-Indexed Bonds

The Funds may invest in inflation-indexed bonds, which are fixed income securities whose principal value or coupon is periodically adjusted according to the rate of inflation, as measured by the Consumer Price Index for All Urban Consumers (“CPI-U”) (for U.S. Treasury inflation-indexed bonds) or, generally, by a comparable inflation index calculated by the foreign government issuing the inflation-indexed bonds.

If the periodic adjustment rate measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds, even during a period of deflation. However, the current market value of the bonds is not guaranteed, and will fluctuate. The Funds may also invest in other inflation related bonds which may or may not provide a similar guarantee. If a guarantee of principal is not provided, the adjusted principal value of the bond repaid at maturity may be less than the original principal. Any adjustments to the principal amount of an inflation-indexed bond due to inflation will be reflected as increases or decreases to interest income. Such adjustments may have a significant impact on the Fund’s distributions.

The value of inflation-indexed bonds is generally based on changes in real interest rates, which in turn are tied to the relationship between nominal interest rates and the rate of inflation. Therefore, if nominal interest rates increased at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed bonds. While the values of these securities are expected to be protected from long-term inflationary trends, short-term increases in inflation may lead to a decline in value. There can be no assurance that the CPI-U or any foreign inflation index will accurately measure the real rate of inflation, or that the rate of inflation in a foreign country will correlate to the rate of inflation in the United States. Additionally, if interest rates rise due to reasons other than inflation, investors in these securities may not be protected to the extent that the increase is not reflected in the bond’s inflation measure.

Bank Loans

Certain of the Funds may invest in bank loans including, for example, corporate loans, loan participations, direct debt, bank debt, and bridge debt. A Fund may invest in a loan by lending money to a borrower directly as part of a syndicate of lenders. In a syndicated loan, the agent that originated and structured the loan typically administers and enforces the loan on behalf of the syndicate. Failure by the agent to fulfill its obligations may delay or adversely affect receipt of payment by a Fund. A Fund may also invest in loans through novations, assignments, and participation interests. In a novation, a Fund typically assumes all of the rights of a lending institution in a loan, including the right to receive payments of principal and interest and other amounts directly from the borrower and to enforce its rights as a lender directly against the borrower. When a Fund takes an assignment of a loan, the Fund acquires some or all of the interest of another lender (or assignee) in the loan. In such cases, the Fund may be required generally to rely upon the assignor to demand payment and enforce rights under the loan. If a Fund acquires a participation in the loan, the Fund purchases an indirect interest in a loan held by a third party and the Fund typically will have a contractual relationship only with the third party loan investor, not with the borrower. As a result, a Fund may have the right to receive payments of principal, interest, and any fees to which it is entitled only from the loan investor selling the participation and only

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Notes to Portfolio of Investments (Unaudited) (Continued)

upon receipt by such loan investor of such payments from the borrower. In such cases, a Fund assumes the credit risk of both the borrower and the loan investor selling the participation, and the Fund may be unable to realize some or all of the value of its interest in the loan in the event of the insolvency of the third party.

Changes in the financial condition of the borrower or economic conditions or other circumstances may reduce the capacity of the borrower to make principal and interest payments on such instruments and may lead to defaults. The value of any collateral securing a bank loan may decline after the Fund invests, and there is a risk that the value of the collateral may not be sufficient to cover the amount owed to the Fund.

At March 31, 2017, the Funds had no unfunded loan commitments.

Repurchase Agreements

Each Fund may enter into repurchase agreements with certain banks and broker-dealers whereby a Fund acquires a security for cash and obtains a simultaneous commitment from the seller to repurchase the security at an agreed upon price and date. A Fund, through its custodian, takes possession of the securities collateralizing the repurchase agreement in a segregated account. Repurchase agreements must be fully collateralized at all times, but involve some risk to a Fund if the other party should default on its obligation and the Fund is delayed or prevented from recovering the collateral, or if the Fund is required to return collateral to a borrower at a time when it may realize a loss on the investment of that collateral.

When-Issued, Delayed-Delivery, Forward Commitment, and To-Be-Announced Transactions

A Fund may enter into when-issued, delayed-delivery, forward commitment, or to-be-announced (“TBA”) transactions (collectively, the “Forward Transactions”) in order to lock in the purchase price of the underlying security, or in order to adjust the interest rate exposure of the Fund’s existing portfolio. In Forward Transactions, a Fund commits to purchase or sell particular securities, with payment and delivery to take place at a future date. In the case of TBA purchase commitments, the unit price and the estimated principal amount are established when the Fund enters into a commitment, with the actual principal amount being within a specified range of the estimate. Although a Fund does not typically pay for the securities in these types of transactions until they are delivered, it immediately assumes the risks of ownership, including the risk of price fluctuation. As a result, each of these types of transactions may create investment leverage in a Fund’s portfolio and increase the volatility of the Fund. If a Fund’s counterparty fails to deliver a security purchased in a Forward Transaction, there may be a loss, and the Fund may have missed an opportunity to make an alternative investment.

These securities are valued on the basis of valuations furnished by a pricing service, selected pursuant to procedures approved by the Trustees, which determines valuations taking into account appropriate factors such as institutional-size trading in similar groups of securities, yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. Securities for which no market quotation is available are valued at fair value in accordance with procedures approved by the Trustees. The Funds record on a daily basis the unrealized appreciation (depreciation) based upon changes in the values of these securities. When a Forward Transaction is closed, the Funds record a realized gain or loss equal to the difference between the value of the transaction at the time it was opened and the value of the transaction at the time it was closed.

Dollar Roll Transactions

A Fund may enter into dollar roll transactions, in which the Fund sells mortgage-backed securities for delivery in the current month and simultaneously contracts to purchase substantially similar securities on a specified future date from the same party. A Fund may invest in dollar rolls in order to benefit from anticipated changes in pricing for the mortgage-backed securities during the term of the transaction, or for the purpose of creating investment leverage. In a dollar roll, the securities that are to be purchased will be of the same type as the securities sold, but will be supported by different pools of mortgages.

Dollar rolls involve the risk that the Fund’s counterparty will be unable to deliver the mortgage-backed securities underlying the dollar roll at the fixed time. If the counterparty files for bankruptcy or becomes insolvent, a Fund’s use of the transaction proceeds may be restricted pending a determination by the counterparty or its representative, whether to enforce the Fund’s obligation to

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Notes to Portfolio of Investments (Unaudited) (Continued)

repurchase the securities. A Fund can incur a loss on a dollar roll transaction (either because its counterparty fails to perform or because the value of the mortgages subject to the transaction declines) and on the investments made by the Fund with the proceeds of the dollar roll transaction.

A Fund accounts for a dollar roll transaction as a purchase and sale whereby the difference in the sales price and purchase price of the security sold is recorded as a realized gain (loss). If certain criteria are met, these dollar roll transactions may be considered financing transactions, whereby the difference in the sales price and the future purchase price is recorded as an adjustment to interest income. Dollar roll transactions generally have the effect of creating leverage in a Fund’s portfolio.

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 qualifying U.S. and foreign 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 or securities adjusted daily to have market 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, 2017, the Funds’ collateral was equal to or greater than 100% of the market value of securities on loan.

Security loans can be terminated at the discretion of either the lending agent or the Fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within three business days. For all Funds, all securities on loan are classified as common stock in the Fund’s Portfolio of Investments at March 31, 2017.

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 gain 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.

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

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Notes to Portfolio of Investments (Unaudited) (Continued)

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.

Allocation of Operating Activity

In maintaining the records for the Funds, the income and expense accounts are allocated daily to each class of shares. Investment income and loss, and unrealized and realized gains or losses are prorated among the classes of shares based on the relative net assets of each. Expenses are allocated to each class of shares depending on the nature of the expenditures. Administration and service fees, if any, which are directly attributable to a class of shares, are charged to that class’s operations. Expenses of a Fund not directly attributable to the operations of any specific class of shares of the Fund are prorated among the classes to which the expense relates based on relative net assets.

In addition, the Aggressive Allocation Fund, MML American Funds Core Allocation Fund, MML American Funds Growth Fund, MML American Funds International Fund, Balanced Allocation Fund, Conservative Allocation Fund, Growth Allocation Fund, and Moderate Allocation Fund will also incur certain fees and expenses indirectly as a shareholder in the Underlying Funds. Because the Underlying Funds have varied expense and fee levels and each Fund, except MML American Funds Growth Fund and MML American Funds International Fund, may own different proportions of Underlying Funds at different times, the amount of fees and expenses indirectly incurred by each Fund will vary.

Foreign Securities

Each of the Foreign Fund and the International Equity Fund invests substantially all of its assets and the Global Fund invests a significant amount of its assets in foreign securities. The other Funds and certain Underlying Funds or Master 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.

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Notes to Portfolio of Investments (Unaudited) (Continued)

3. Federal Income Tax Information

At March 31, 2017, the cost of securities and the unrealized appreciation (depreciation) in the value of investments owned by the Fund(s), as computed on a federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Aggressive Allocation Fund	$	141,106,184	$	3,213,392	$	(1,188,052	)	$	2,025,340
MML American Funds Core Allocation Fund		950,112,398		59,820,362		(2,513,604	)		57,306,758
MML American Funds Growth Fund		134,596,930		16,007,470		-			16,007,470
MML American Funds International Fund		57,277,334		1,408,120		-			1,408,120
Balanced Allocation Fund		587,100,165		9,782,427		(9,257,774	)		524,653
Blue Chip Growth Fund		238,762,691		132,704,039		(3,208,932	)		129,495,107
Conservative Allocation Fund		470,323,376		5,431,858		(6,148,405	)		(716,547	)
Equity Income Fund		378,311,650		115,810,502		(12,224,752	)		103,585,750
Equity Index Fund		446,065,978		245,383,675		(5,932,280	)		239,451,395
Focused Equity Fund		93,504,172		24,808,914		(1,360,600	)		23,448,314
Foreign Fund		349,279,919		54,190,120		(27,048,991	)		27,141,129
Fundamental Growth Fund		135,435,268		31,047,202		(1,206,829	)		29,840,373
Fundamental Value Fund		166,057,478		56,263,925		(6,781,820	)		49,482,105
Global Fund		212,104,468		47,564,686		(4,006,281	)		43,558,405
Growth Allocation Fund		1,601,346,507		71,283,900		(15,742,873	)		55,541,027
Growth & Income Fund		89,809,783		42,584,910		(816,524	)		41,768,386
Income & Growth Fund		226,862,600		54,749,342		(3,150,802	)		51,598,540
International Equity Fund		152,983,660		19,043,743		(3,649,953	)		15,393,790
Large Cap Growth Fund		93,467,113		17,240,315		(1,236,573	)		16,003,742
Managed Volatility Fund		149,192,685		43,651,219		(7,411,620	)		36,239,599
Mid Cap Growth Fund		345,486,599		128,936,411		(4,716,685	)		124,219,726
Mid Cap Value Fund		403,673,489		76,755,775		(7,318,492	)		69,437,283
Moderate Allocation Fund		2,401,065,329		49,596,325		(33,188,471	)		16,407,854
Small Cap Growth Equity Fund		206,455,227		33,187,394		(6,826,604	)		26,360,790
Small Company Value Fund		81,559,175		29,444,222		(1,724,720	)		27,719,502
Small/Mid Cap Value Fund		182,033,486		42,583,999		(4,114,600	)		38,469,399
Total Return Bond Fund		452,008,441		5,056,525		(4,592,489	)		464,036

4. Investment in Affiliated Issuers

A summary of the Funds’ transactions in the securities of affiliated issuers during the period ended March 31, 2017, was as follows:

	Number of Shares Held as of 12/31/16		Purchases		Sales		Number of Shares Held as of 3/31/17		Value as of 3/31/17		Dividend Income		Realized Gains Distributions		Net Realized Gain (Loss)
Aggressive Allocation Fund
MML Blue Chip Growth Fund, Initial Class		607,538		31,510		73,987		565,061	$	8,713,246	$	-	$	-	$	(9,764	)
MML Dynamic Bond Fund, Class II		199,325		10,785		-		210,110		2,107,403		-		-		-
MML Equity Income Fund, Initial Class		561,322		28,000		18,565		570,757		6,951,816		-		-		49,411
MML Equity Index Fund, Class III		68,329		122,919		-		191,248		5,375,975		-		-		-
MML Focused Equity Fund, Class II		372,991		22,018		76,271		318,738		4,503,768		-		-		(70,902	)
MML Foreign Fund, Initial Class		714,459		20,072		15,388		719,143		7,270,539		-		-		9,286
MML Fundamental Growth Fund, Class II		564,841		28,228		80,365		512,704		6,378,042		-		-		64,286
MML Fundamental Value Fund, Class II		592,968		21,511		70,700		543,779		8,314,381		-		-		171,340

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Notes to Portfolio of Investments (Unaudited) (Continued)

	Number of Shares Held as of 12/31/16		Purchases		Sales		Number of Shares Held as of 3/31/17		Value as of 3/31/17		Dividend Income		Realized Gains Distributions		Net Realized Gain (Loss)
Aggressive Allocation Fund (Continued)
MML Global Fund, Class I		692,226		23,293		29,848		685,671	$	8,543,456	$	-	$	-	$	34,640
MML Income & Growth Fund, Initial Class		592,137		21,172		26,097		587,212		7,187,470		-		-		66,291
MML Inflation-Protected and Income Fund, Initial Class		350,048		24,967		3,737		371,278		3,827,877		-		-		(1,036	)
MML International Equity Fund, Class II		667,198		19,888		27,579		659,507		6,759,948		-		-		538
MML Large Cap Growth Fund, Initial Class		263,752		30,508		9,661		284,599		3,292,812		-		-		(24,484	)
MML Managed Bond Fund, Initial Class		261,001		23,271		4,330		279,942		3,467,698		-		-		(1,419	)
MML Mid Cap Growth Fund, Initial Class		516,877		19,096		6,040		529,933		8,229,855		-		-		21,546
MML Mid Cap Value Fund, Initial Class		641,176		25,255		7,923		658,508		8,027,218		-		-		(9,480	)
MML Short-Duration Bond Fund, Class II		289,095		28,874		3,112		314,857		3,091,896		-		-		(573	)
MML Small Cap Growth Equity Fund, Initial Class		154,970		10,164		3,204		161,930		2,179,204		-		-		(30,077	)
MML Small Company Value Fund, Class II		208,840		8,595		2,689		214,746		3,700,067		-		-		(11,309	)
MML Small/Mid Cap Value Fund, Initial Class		204,807		7,707		2,406		210,108		2,830,149		-		-		1,291
MML Strategic Emerging Markets Fund, Class II		532,589		22,776		16,766		538,599		5,159,777		-		-		(18,767	)
MML Total Return Bond Fund, Class II		185,417		15,480		2,234		198,663		2,056,166		-		-		(1,341	)
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares*		35,144		1,337		422		36,059		2,843,619		-		-		2,841
Oppenheimer Global Fund/VA, Non-Service Shares*		154,404		3,645		2,883		155,166		5,997,167		-		-		(4,542	)
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares*		1,191,553		91,136		-		1,282,689		12,724,279		-		-		-
Oppenheimer International Growth Fund/VA, Non-Service Shares*		1,583,033		67,783		37,499		1,613,317		3,597,696		-		-		(4,601	)
									$	143,131,524	$	-	$	-	$	233,175
Balanced Allocation Fund
MML Blue Chip Growth Fund, Initial Class		1,525,592		24,637		202,379		1,347,850	$	20,783,842	$	-	$	-	$	200,555
MML Dynamic Bond Fund, Class II		6,400,654		35,070		-		6,435,724		64,550,312		-		-		-
MML Equity Income Fund, Initial Class		1,522,823		27,459		76,703		1,473,579		17,948,194		-		-		148,099
MML Equity Index Fund, Class III		344,598		230,121		-		574,719		16,155,362		-		-		-
MML Focused Equity Fund, Class II		826,731		13,249		177,087		662,893		9,366,673		-		-		401,610
MML Foreign Fund, Initial Class		1,767,360		16,284		112,127		1,671,517		16,899,035		-		-		51,896
MML Fundamental Growth Fund, Class II		1,335,158		21,349		78,856		1,277,651		15,893,984		-		-		48,624
MML Fundamental Value Fund, Class II		1,216,219		20,821		62,251		1,174,789		17,962,519		-		-		207,552
MML Global Fund, Class I		1,608,498		16,014		92,688		1,531,824		19,086,521		-		-		319,394
MML High Yield Fund, Class II		1,596,827		-		73,529		1,523,298		15,659,501		-		-		(63,957	)
MML Income & Growth Fund, Initial Class		1,708,600		20,590		192,933		1,536,257		18,803,789		-		-		543,598
MML Inflation-Protected and Income Fund, Initial Class		2,092,360		59,528		47,600		2,104,288		21,695,214		-		-		(72,434	)
MML International Equity Fund, Class II		1,462,951		16,256		113,218		1,365,989		14,001,386		-		-		19,643
MML Large Cap Growth Fund, Initial Class		587,861		28,488		61,490		554,859		6,419,721		-		-		(209,749	)
MML Managed Bond Fund, Initial Class		8,228,878		371,037		278,593		8,321,322		103,077,984		-		-		(223,551	)
MML Mid Cap Growth Fund, Initial Class		975,060		12,067		45,388		941,739		14,625,206		-		-		108,021
MML Mid Cap Value Fund, Initial Class		1,369,170		18,860		33,180		1,354,850		16,515,625		-		-		44,449
MML Short-Duration Bond Fund, Class II		2,891,059		170,768		144,493		2,917,334		28,648,223		-		-		(48,938	)
MML Small Cap Growth Equity Fund, Initial Class		319,938		7,261		12,816		314,383		4,230,868		-		-		(85,728	)
MML Small Company Value Fund, Class II		409,118		6,304		11,071		404,351		6,966,974		-		-		(36,760	)
MML Small/Mid Cap Value Fund, Initial Class		353,523		5,932		10,462		348,993		4,700,936		-		-		1,773
MML Total Return Bond Fund, Class II		5,879,263		225,573		138,062		5,966,774		61,756,114		-		-		(12,250	)
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares*		65,125		930		2,532		63,523		5,009,396		-		-		14,201
Oppenheimer Global Fund/VA, Non-Service Shares*		354,384		4,730		27,356		331,758		12,822,430		-		-		131,927
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares*		4,189,370		25,176		90,452		4,124,094		40,911,017		-		-		(70,553	)
Oppenheimer International Growth Fund/VA, Non-Service Shares*		5,771,175		340,119		221,611		5,889,683		13,133,992		-		-		(9,751	)
									$	587,624,818	$	-	$	-	$	1,407,671

94

Notes to Portfolio of Investments (Unaudited) (Continued)

	Number of Shares Held as of 12/31/16		Purchases		Sales		Number of Shares Held as of 3/31/17		Value as of 3/31/17		Dividend Income		Realized Gains Distributions		Net Realized Gain (Loss)
Conservative Allocation Fund
MML Blue Chip Growth Fund, Initial Class		948,536		5,492		159,867		794,161	$	12,245,958	$	-	$	-	$	(361,291	)
MML Dynamic Bond Fund, Class II		6,557,621		-		-		6,557,621		65,772,943		-		-		-
MML Equity Income Fund, Initial Class		1,086,900		19,611		119,462		987,049		12,022,256		-		-		(88,828	)
MML Equity Index Fund, Class III		272,727		153,436		-		426,163		11,979,450		-		-		-
MML Focused Equity Fund, Class II		580,032		4,545		137,852		446,725		6,312,230		-		-		15,491
MML Foreign Fund, Initial Class		1,008,329		3,425		63,528		948,226		9,586,563		-		-		10,889
MML Fundamental Growth Fund, Class II		871,922		7,234		80,613		798,543		9,933,877		-		-		(111,359	)
MML Fundamental Value Fund, Class II		934,193		4,699		139,404		799,488		12,224,166		-		-		46,043
MML Global Fund, Class I		1,047,855		4,195		87,341		964,709		12,020,269		-		-		110,179
MML High Yield Fund, Class II		1,547,264		-		87,140		1,460,124		15,010,079		-		-		(59,658	)
MML Income & Growth Fund, Initial Class		1,144,851		6,298		104,076		1,047,073		12,816,168		-		-		147,860
MML Inflation-Protected and Income Fund, Initial Class		1,986,984		9,400		107,084		1,889,300		19,478,682		-		-		(22,459	)
MML International Equity Fund, Class II		795,236		3,420		51,970		746,686		7,653,536		-		-		(20,585	)
MML Large Cap Growth Fund, Initial Class		364,199		57,240		78,374		343,065		3,969,258		-		-		(10,405	)
MML Managed Bond Fund, Initial Class		8,380,314		212,684		613,407		7,979,591		98,844,897		-		-		(337,928	)
MML Mid Cap Growth Fund, Initial Class		556,347		2,805		38,264		520,888		8,089,386		-		-		8,332
MML Mid Cap Value Fund, Initial Class		853,669		4,507		44,670		813,506		9,916,643		-		-		(60,263	)
MML Short-Duration Bond Fund, Class II		2,614,870		92,108		202,561		2,504,417		24,593,372		-		-		(39,161	)
MML Small Cap Growth Equity Fund, Initial Class		191,703		1,656		16,389		176,970		2,381,613		-		-		(66,414	)
MML Small Company Value Fund, Class II		289,700		1,697		16,759		274,638		4,732,019		-		-		(103,929	)
MML Small/Mid Cap Value Fund, Initial Class		184,477		1,261		12,472		173,266		2,333,887		-		-		(1,640	)
MML Total Return Bond Fund, Class II		5,876,460		136,813		285,356		5,727,917		59,283,936		-		-		(140,286	)
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares*		37,243		189		1,867		35,565		2,804,659		-		-		8,190
Oppenheimer Global Fund/VA, Non-Service Shares*		229,821		1,072		21,009		209,884		8,112,009		-		-		(59,828	)
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares*		3,249,945		-		160,421		3,089,524		30,648,073		-		-		(126,457	)
Oppenheimer International Growth Fund/VA, Non-Service Shares*		3,309,102		16,290		257,724		3,067,668		6,840,900		-		-		(35,596	)
									$	469,606,829	$	-	$	-	$	(1,299,103	)
Growth Allocation Fund
MML Blue Chip Growth Fund, Initial Class		6,756,203		16,798		1,475,002		5,297,999	$	81,695,141	$	-	$	-	$	8,060,586
MML Dynamic Bond Fund, Class II		8,242,299		35,070		-		8,277,369		83,022,008		-		-		-
MML Equity Income Fund, Initial Class		5,761,598		324,247		265,512		5,820,333		70,891,655		-		-		776,056
MML Equity Index Fund, Class III		1,324,158		1,456,056		-		2,780,214		78,151,829		-		-		-
MML Focused Equity Fund, Class II		4,078,850		10,807		1,019,728		3,069,929		43,378,091		-		-		2,431,330
MML Foreign Fund, Initial Class		7,210,379		182,066		260,481		7,131,964		72,104,154		-		-		258,616
MML Fundamental Growth Fund, Class II		5,185,134		14,987		716,903		4,483,218		55,771,228		-		-		455,204
MML Fundamental Value Fund, Class II		5,306,715		11,775		444,621		4,873,869		74,521,455		-		-		2,140,126
MML Global Fund, Class I		6,952,467		13,084		458,235		6,507,316		81,081,162		-		-		1,693,535
MML High Yield Fund, Class II		1,378,040		7,758		107,843		1,277,955		13,137,378		-		-		(45,648	)
MML Income & Growth Fund, Initial Class		5,998,774		94,533		327,190		5,766,117		70,577,270		-		-		1,013,464
MML Inflation-Protected and Income Fund, Initial Class		6,381,423		108,392		98,874		6,390,941		65,890,604		-		-		(127,268	)
MML International Equity Fund, Class II		6,624,099		9,131		290,773		6,342,457		65,010,188		-		-		69,245
MML Large Cap Growth Fund, Initial Class		2,631,374		15,150		209,981		2,436,543		28,190,797		-		-		(526,667	)
MML Managed Bond Fund, Initial Class		10,241,038		486,277		236,289		10,491,026		129,954,568		-		-		(196,803	)
MML Mid Cap Growth Fund, Initial Class		4,863,579		9,103		95,585		4,777,097		74,188,309		-		-		562,919
MML Mid Cap Value Fund, Initial Class		6,049,974		11,753		123,386		5,938,341		72,388,382		-		-		373,577
MML Short-Duration Bond Fund, Class II		4,765,970		248,138		188,835		4,825,273		47,384,179		-		-		(54,694	)
MML Small Cap Growth Equity Fund, Initial Class		1,363,846		4,739		49,711		1,318,874		17,748,992		-		-		(310,996	)
MML Small Company Value Fund, Class II		1,952,409		4,088		42,910		1,913,587		32,971,109		-		-		949

95

Notes to Portfolio of Investments (Unaudited) (Continued)

	Number of Shares Held as of 12/31/16		Purchases		Sales		Number of Shares Held as of 3/31/17		Value as of 3/31/17		Dividend Income		Realized Gains Distributions		Net Realized Gain (Loss)
Growth Allocation Fund (Continued)
MML Small/Mid Cap Value Fund, Initial Class		1,943,414		3,707		38,923		1,908,198	$	25,703,427	$	-	$	-	$	17,471
MML Strategic Emerging Markets Fund, Class II		4,844,657		10,320		243,661		4,611,316		44,176,407		-		-		(282,516	)
MML Total Return Bond Fund, Class II		7,429,070		249,141		146,522		7,531,689		77,952,979		-		-		55,827
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares*		308,373		607		6,388		302,592		23,862,406		-		-		44,952
Oppenheimer Global Fund/VA, Non-Service Shares*		1,541,426		1,889		97,687		1,445,628		55,873,529		-		-		844,278
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares*		13,653,001		119,006		36,400		13,735,607		136,257,222		-		-		-
Oppenheimer International Growth Fund/VA, Non-Service Shares*		15,697,197		486,702		487,457		15,696,442		35,003,065		-		-		(21,886	)
									$	1,656,887,534	$	-	$	-	$	17,231,657
Moderate Allocation Fund
MML Blue Chip Growth Fund, Initial Class		7,994,376		4,125		1,540,571		6,457,930	$	99,581,278	$	-	$	-	$	3,396,224
MML Dynamic Bond Fund, Class II		21,214,046		-		-		21,214,046		212,776,884		-		-		-
MML Equity Income Fund, Initial Class		7,706,912		85,237		487,060		7,305,089		88,975,981		-		-		1,507,654
MML Equity Index Fund, Class III		1,443,633		1,248,216		-		2,691,849		75,667,864		-		-		-
MML Focused Equity Fund, Class II		3,911,670		2,474		716,731		3,197,413		45,179,444		-		-		673,072
MML Foreign Fund, Initial Class		8,510,670		2,199		336,644		8,176,225		82,661,639		-		-		271,357
MML Fundamental Growth Fund, Class II		6,504,519		3,628		711,578		5,796,569		72,109,319		-		-		414,939
MML Fundamental Value Fund, Class II		7,132,757		2,990		1,166,534		5,969,213		91,269,263		-		-		4,845,356
MML Global Fund, Class I		8,143,690		3,304		629,601		7,517,393		93,666,713		-		-		2,046,799
MML High Yield Fund, Class II		5,059,132		15,656		127,451		4,947,337		50,858,619		-		-		(100,248	)
MML Income & Growth Fund, Initial Class		7,277,471		325,784		365,383		7,237,872		88,591,557		-		-		1,113,850
MML Inflation-Protected and Income Fund, Initial Class		7,471,136		97,210		176,561		7,391,785		76,209,307		-		-		(248,693	)
MML International Equity Fund, Class II		6,609,648		617,135		329,709		6,897,074		70,695,012		-		-		(88,483	)
MML Large Cap Growth Fund, Initial Class		3,078,167		6,706		253,865		2,831,008		32,754,763		-		-		(652,308	)
MML Managed Bond Fund, Initial Class		27,172,837		579,963		873,085		26,879,715		332,964,752		-		-		(695,607	)
MML Mid Cap Growth Fund, Initial Class		5,348,661		2,071		198,264		5,152,468		80,017,825		-		-		736,767
MML Mid Cap Value Fund, Initial Class		7,089,359		4,750		180,588		6,913,521		84,275,821		-		-		195,286
MML Short-Duration Bond Fund, Class II		10,292,741		369,397		507,652		10,154,486		99,717,052		-		-		(180,224	)
MML Small Cap Growth Equity Fund, Initial Class		1,642,308		1,806		68,976		1,575,138		21,197,713		-		-		(433,358	)
MML Small Company Value Fund, Class II		2,290,115		1,669		63,585		2,228,199		38,391,875		-		-		(47,256	)
MML Small/Mid Cap Value Fund, Initial Class		1,748,910		1,412		54,060		1,696,262		22,848,650		-		-		8,909
MML Strategic Emerging Markets Fund, Class II		4,604,786		33,830		172,751		4,465,865		42,782,984		-		-		(192,426	)
MML Total Return Bond Fund, Class II		18,940,084		820,801		436,309		19,324,576		200,009,361		-		-		64,464
Oppenheimer Discovery Mid Cap Growth Fund/VA, Non-Service Shares*		328,040		226		8,662		319,604		25,204,003		-		-		59,983
Oppenheimer Global Fund/VA, Non-Service Shares*		1,800,933		606		161,738		1,639,801		63,378,327		-		-		1,536,332
Oppenheimer Global Multi-Alternatives Fund/VA, Non-Service Shares*		18,221,504		51,954		-		18,273,458		181,272,706		-		-		-
Oppenheimer International Growth Fund/VA, Non-Service Shares*		19,897,140		1,700,058		1,680,395		19,916,803		44,414,471		-		-		(139,120	)
									$	2,417,473,183	$	-	$	-	$	14,093,269

* Fund advised by OFI Global Asset Management, Inc.

96

Notes to Portfolio of Investments (Unaudited) (Continued)

5. New Accounting Pronouncements

In October 2016, the Securities and Exchange Commission (“SEC”) released its Final Rule on Investment Company Reporting Modernization (the “Rule”). The Rule, which introduces two new regulatory reporting forms for investment companies — Form N-PORT and Form N-CEN — also contains amendments to Regulation S-X which impact financial statement presentation, particularly the presentation of derivative investments. Management is still evaluating the impact of the Rule; however, management believes that many of the Regulation S-X amendments are consistent with the Funds’ current financial statement presentation and expects that each Fund will be able to comply with the Rule’s Regulation S-X amendments by the August 1, 2017 compliance date.

In December 2016, The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2016-19, Technical Corrections and Improvements (“ASU 2016-19”). ASU 2016-19 includes simplification and minor improvements to topics on insurance and troubled debt restructuring. The amendment requires an entity to disclose when there has been a change in a valuation approach, a valuation technique, or both. The transition guidance for the amendment must be applied prospectively because it could potentially involve the use of hindsight that includes fair value measurements. The guidance is effective for interim periods beginning after December 15, 2016. Management is currently evaluating the implication, if any, of the additional disclosure requirements and its impact on the Funds’ financial statements.

In March 2017, FASB issued Accounting Standards Update 2017-08, Receivables — Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities (“ASU 2017-08”). For entities that hold callable debt securities at a premium, ASU 2017-08 requires that the premium be amortized to the earliest call date. ASU 2017-08 would first be effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management is still evaluating the potential impact of ASU 2017-08 but believes that adoption of ASU 2017-08 will not have a material effect on each Fund’s financial position or its results of operations.

6. 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.

The potential amounts sought to be recovered from the Equity Income Fund and Equity Index Fund, plus interest and the Official Committee’s court costs, are approximately $4,562,800 and $207,706, respectively.

In addition, on June 2, 2011, the Equity Income Fund was named as a defendant in two closely related, parallel adversary proceedings 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”), one in the United States District Court for the District of Massachusetts and one in the United States District Court for the District of Connecticut. The Plaintiffs also seek to recover payments of the Proceeds.

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 Official Committee or the Plaintiffs, as applicable, the payment of such judgment or settlement could potentially have a material adverse effect on the Funds’ net asset values depending on the net assets of each applicable Fund at the time of such judgment or settlement.

97

Notes to Portfolio of Investments (Unaudited) (Continued)

7. Subsequent Events

Management has evaluated the events and transactions subsequent to March 31, 2017, through the date when the Portfolios of Investments were issued, and determined that there are no subsequent events or transactions that would require adjustments to or disclosures in the Funds’ Portfolios of Investments.

98

Item 2. Controls and Procedures.

(a) The Registrant’s Principal Executive Officer and Principal Financial Officer have concluded that the Registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”) (17 CFR 270.30a-3(c))), are effective, as of a date within 90 days of the filing date of this Form N-Q, to provide reasonable assurance that the information required to be disclosed by the Registrant on Form N-Q is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms, based on their evaluation of these disclosure controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).

(b) There were no changes in the Registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d))) that occurred during the Registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Registrant’s internal control over financial reporting.

Item 3. Exhibits.

(a) Certifications of the Principal Executive Officer and Principal Financial Officer of the Registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)) are attached hereto as Exhibit 99CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)     MML Series Investment Fund

By	/s/ Brian Haendiges
	Brian Haendiges, President and Principal Executive Officer

Date  5/24/2017

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By	/s/ Brian Haendiges
	Brian Haendiges, President and Principal Executive Officer

Date  5/24/2017

By	/s/ Renee Hitchcock
	Renee Hitchcock, Treasurer and Principal Financial Officer

Date  5/24/2017