Massmutual Premier Funds NPORT-P MassMutual Premier High Yield Fund (Jun 2020 report)

MassMutual Premier Short-Duration Bond Fund — Portfolio of Investments

June 30, 2020 (Unaudited)

	Principal Amount		Value
Bonds & Notes — 96.1%
Corporate Debt — 42.0%
Advertising — 0.1%
The Interpublic Group of Cos., Inc. 3.750% 10/01/21	$	560,000	$	580,591
Agriculture — 1.5%
BAT Capital Corp. 3.222% 8/15/24		1,100,000		1,178,085
Bunge Ltd. Finance Corp. 3.500% 11/24/20		1,690,000		1,705,973
Imperial Brands Finance PLC 3.125% 7/26/24 (a)		1,043,000		1,083,202
3.500% 2/11/23 (a)		979,000		1,015,696
Reynolds American, Inc. 4.000% 6/12/22		1,500,000		1,584,734
				6,567,690
Airlines — 0.0%
American Airlines Pass-Through Trust, Series 2014-1, Class B, 4.375% 4/01/24		58,601		42,129
Auto Manufacturers — 2.0%
Ford Motor Credit Co. LLC 3 mo. USD LIBOR + 1.235% 1.627% FRN 2/15/23		1,130,000		1,011,476
3 mo. USD LIBOR + 0.810% 2.183% FRN 4/05/21		660,000		633,446
3.087% 1/09/23		625,000		595,312
3.350% 11/01/22		935,000		895,524
General Motors Financial Co., Inc. 3.250% 1/05/23		2,465,000		2,518,701
Hyundai Capital America 2.375% 2/10/23 (a)		1,510,000		1,521,296
2.850% 11/01/22 (a)		810,000		826,540
Nissan Motor Acceptance Corp. 1.900% 9/14/21 (a)		485,000		476,229
				8,478,524
Banks — 8.7%
ABN AMRO Bank NV 4.750% 7/28/25 (a)		985,000		1,085,547
Banco Santander SA 2.746% 5/28/25		1,200,000		1,243,578
3.500% 4/11/22		1,030,000		1,071,232
Bank of America Corp. 3 mo. USD LIBOR + 0.930% 2.816% VRN 7/21/23		3,730,000		3,874,308
The Bank of Nova Scotia 4.500% 12/16/25		1,020,000		1,158,929
Barclays Bank PLC 10.179% 6/12/21 (a)		1,522,000		1,645,883
Barclays PLC 3 mo. USD LIBOR + 1.380% 1.766% FRN 5/16/24		595,000		589,559
BPCE SA 5.700% 10/22/23 (a)		1,895,000		2,111,682
Citigroup, Inc. 4.400% 6/10/25		1,965,000		2,200,417
Credit Suisse AG 6.500% 8/08/23 (a)		2,400,000		2,616,624
Danske Bank A/S 5.000% 1/12/22 (a)		1,080,000		1,134,659
Discover Bank 3.350% 2/06/23		1,432,000		1,510,582
4.200% 8/08/23		1,000,000		1,091,963
First Horizon National Corp. 3.500% 12/15/20		1,290,000		1,300,067
The Goldman Sachs Group, Inc. 3.200% 2/23/23		585,000		620,716
4.250% 10/21/25		3,095,000		3,484,015
HSBC Holdings PLC 4.250% 3/14/24		2,025,000		2,184,850
Mitsubishi UFJ Financial Group, Inc. 2.665% 7/25/22		1,350,000		1,403,244
Morgan Stanley SOFR + 1.990% 2.188% VRN 4/28/26		1,030,000		1,072,445
3.750% 2/25/23		846,000		912,996
4.100% 5/22/23		984,000		1,063,427
Sumitomo Mitsui Financial Group, Inc. 1.474% 7/08/25 (b)		780,000		780,955
2.448% 9/27/24		855,000		896,835
3.748% 7/19/23		764,000		827,530
Synchrony Bank 3.000% 6/15/22		750,000		765,789
UBS Group AG 4.125% 9/24/25 (a)		840,000		952,102
				37,599,934
Beverages — 0.3%
Bacardi Ltd. 4.450% 5/15/25 (a)		206,000		225,286
Molson Coors Beverage Co. 2.100% 7/15/21		310,000		313,806
3.500% 5/01/22		720,000		751,262
				1,290,354
Building Materials — 0.1%
Masco Corp. 3.500% 4/01/21		270,000		273,722
Chemicals — 1.4%
DuPont de Nemours, Inc. 4.493% 11/15/25		1,660,000		1,909,338
Huntsman International LLC 5.125% 11/15/22		2,410,000		2,552,915
RPM International, Inc. 3.450% 11/15/22		43,000		44,382
The Sherwin-Williams Co. 2.750% 6/01/22		61,000		63,003

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

	Principal Amount		Value
Syngenta Finance NV 4.441% 4/24/23 (a)	$	1,460,000	$	1,532,347
				6,101,985
Commercial Services — 0.3%
The ADT Security Corp. 6.250% 10/15/21		1,260,000		1,291,500
Computers — 1.6%
Dell International LLC / EMC Corp. 5.850% 7/15/25 (a)		836,000		960,731
4.000% 7/15/24 (a)		1,113,000		1,199,762
Genpact Luxembourg Sarl 3.375% 12/01/24		905,000		933,905
3.700% STEP 4/01/22		1,480,000		1,519,641
Leidos Holdings, Inc. 4.450% 12/01/20		1,511,000		1,506,656
Leidos, Inc. 2.950% 5/15/23 (a)		910,000		947,947
				7,068,642
Diversified Financial Services — 3.7%
AerCap Ireland Capital DAC / AerCap Global Aviation Trust 2.875% 8/14/24		2,190,000		2,056,169
4.500% 9/15/23 (b)		590,000		590,069
Aircastle Ltd. 5.000% 4/01/23		2,390,000		2,328,634
Antares Holdings LP 6.000% 8/15/23 (a)		1,172,000		1,124,172
Avolon Holdings Funding Ltd. 2.875% 2/15/25 (a)		815,000		683,913
Brookfield Finance, Inc. 4.000% 4/01/24		1,520,000		1,648,189
Lazard Group LLC 3.750% 2/13/25		1,840,000		1,953,657
LeasePlan Corp. NV 2.875% 10/24/24 (a)		715,000		731,098
Park Aerospace Holdings Ltd. 5.250% 8/15/22 (a)		3,310,000		3,107,008
Synchrony Financial 2.850% 7/25/22		1,540,000		1,566,310
				15,789,219
Electric — 1.2%
Ameren Corp. 2.500% 9/15/24		865,000		916,636
2.700% 11/15/20		815,000		819,987
Enel Finance International NV 2.875% 5/25/22 (a)		755,000		780,933
Entergy Texas, Inc. 2.550% 6/01/21		605,000		614,327
Pacific Gas and Electric Co. 1.750% 6/16/22		1,465,000		1,467,344
Puget Energy, Inc. 6.000% 9/01/21		740,000		780,610
				5,379,837
Electronics — 0.1%
FLIR Systems, Inc. 3.125% 6/15/21		650,000		660,611
Household Products & Wares — 0.4%
Church & Dwight Co., Inc. 2.875% 10/01/22		1,493,000		1,560,626
Housewares — 0.6%
Newell Brands, Inc. 4.350% STEP 4/01/23		2,415,000		2,486,967
Insurance — 3.4%
American International Group, Inc. 2.500% 6/30/25		430,000		455,195
3.750% 7/10/25		1,240,000		1,372,235
AmTrust Financial Services, Inc. 6.125% 8/15/23		1,565,000		1,452,070
Athene Global Funding 2.750% 6/25/24 (a)		2,650,000		2,687,892
CNA Financial Corp. 5.750% 8/15/21		901,000		949,581
Enstar Group Ltd. 4.500% 3/10/22		1,800,000		1,823,623
Equitable Holdings, Inc. 3.900% 4/20/23		211,000		225,854
Jackson National Life Global Funding 2.500% 6/27/22 (a)		1,040,000		1,072,886
Lincoln National Corp. 4.000% 9/01/23		310,000		337,521
Trinity Acquisition PLC 3.500% 9/15/21		1,215,000		1,244,769
Unum Group 3.875% 11/05/25		1,395,000		1,448,343
4.500% 3/15/25		620,000		665,945
Willis Towers Watson PLC 5.750% 3/15/21		840,000		866,831
				14,602,745
Investment Companies — 1.6%
Ares Capital Corp. 4.200% 6/10/24		2,499,000		2,558,806
BlackRock TCP Capital Corp. 3.900% 8/23/24		835,000		815,010
4.125% 8/11/22		1,805,000		1,809,526
Sixth Street Specialty Lending, Inc. 3.875% 11/01/24		1,665,000		1,660,949
				6,844,291
Iron & Steel — 0.2%
Steel Dynamics, Inc. 2.400% 6/15/25		375,000		386,212

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

	Principal Amount		Value
2.800% 12/15/24	$	610,000	$	634,836
				1,021,048
Lodging — 0.6%
Las Vegas Sands Corp. 3.200% 8/08/24		2,165,000		2,157,529
Marriott International, Inc. /MD 5.750% 5/01/25		389,000		422,593
				2,580,122
Machinery – Diversified — 0.4%
CNH Industrial Capital LLC 1.950% 7/02/23 (b)		275,000		276,805
3.875% 10/15/21		1,015,000		1,040,244
4.875% 4/01/21		590,000		605,338
				1,922,387
Media — 0.7%
Discovery Communications LLC 2.950% 3/20/23		614,000		645,060
Sirius XM Radio, Inc. 3.875% 8/01/22 (a)		2,200,000		2,216,742
				2,861,802
Mining — 1.0%
Glencore Funding LLC 4.125% 5/30/23 (a)		1,480,000		1,582,163
Kinross Gold Corp. 5.125% 9/01/21		550,000		565,226
5.950% 3/15/24		1,950,000		2,191,966
				4,339,355
Oil & Gas — 1.3%
Continental Resources, Inc. 5.000% 9/15/22		1,017,000		999,202
EQT Corp. 3.000% 10/01/22		1,610,000		1,497,300
6.125% STEP 2/01/25		790,000		787,251
Newfield Exploration Co. 5.625% 7/01/24		1,220,000		1,165,769
Valero Energy Corp. 2.700% 4/15/23		935,000		970,088
				5,419,610
Packaging & Containers — 0.3%
Graphic Packaging International LLC 4.750% 4/15/21		1,510,000		1,528,875
Pharmaceuticals — 1.4%
AbbVie, Inc. 3.800% 3/15/25 (a)		1,245,000		1,381,347
Becton Dickinson and Co. 3 mo. USD LIBOR + 0.875% 1.181% FRN 12/29/20		727,000		727,047
Cardinal Health, Inc. 3 mo. USD LIBOR + 0.770% 1.083% FRN 6/15/22		1,345,000		1,342,668
Mylan, Inc. 3.125% 1/15/23 (a)		1,375,000		1,445,102
Teva Pharmaceutical Finance Netherlands III BV 2.200% 7/21/21		654,000		640,685
Upjohn, Inc. 1.650% 6/22/25 (a)		355,000		361,969
				5,898,818
Pipelines — 2.0%
Energy Transfer Operating LP 4.200% 9/15/23		2,370,000		2,518,131
EnLink Midstream Partners LP 4.400% 4/01/24		1,340,000		1,112,870
EQM Midstream Partners LP 4.750% 7/15/23		1,305,000		1,313,782
MPLX LP 3 mo. USD LIBOR + 1.100% 1.413% FRN 9/09/22		2,605,000		2,561,783
Plains All American Pipeline LP/PAA Finance Corp. 3.850% 10/15/23		952,000		987,238
				8,493,804
Private Equity — 0.3%
Hercules Capital, Inc. 4.625% 10/23/22		1,495,000		1,440,297
Real Estate Investment Trusts (REITS) — 2.1%
CubeSmart LP 4.375% 12/15/23		764,000		833,989
Essex Portfolio LP 3.500% 4/01/25		330,000		359,770
3.875% 5/01/24		424,000		461,301
SBA Tower Trust 2.836% 1/15/25 (a)		3,350,000		3,453,952
Service Properties Trust 4.350% 10/01/24		1,215,000		1,095,084
Tanger Properties LP 3.875% 12/01/23		1,325,000		1,301,962
VEREIT Operating Partnership LP 4.600% 2/06/24		1,410,000		1,504,339
				9,010,397
Retail — 1.9%
Advance Auto Parts, Inc. 4.500% 12/01/23		990,000		1,074,039
Dollar Tree, Inc. 3.700% 5/15/23		2,020,000		2,164,883
O’Reilly Automotive, Inc. 3.800% 9/01/22		191,000		200,602
3.850% 6/15/23		2,206,000		2,322,513
QVC, Inc. 4.375% 3/15/23		2,500,000		2,499,750
				8,261,787

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

	Principal Amount		Value
Semiconductors — 0.4%
Microchip Technology, Inc. 3.922% 6/01/21	$	905,000	$	922,638
NXP BV/NXP Funding LLC 4.125% 6/01/21 (a)		865,000		890,807
				1,813,445
Telecommunications — 1.5%
AT&T, Inc. 3.400% 5/15/25		1,020,000		1,120,938
Qwest Corp 6.750% 12/01/21		1,255,000		1,326,292
Sprint Communications, Inc. 9.250% 4/15/22		800,000		884,000
T-Mobile USA, Inc. 1.500% 2/15/26 (a)		980,000		979,932
Telefonaktiebolaget LM Ericsson 4.125% 5/15/22		2,046,000		2,142,162
				6,453,324
Transportation — 0.4%
Ryder System, Inc. 2.500% 9/01/22		40,000		41,183
3.400% 3/01/23		485,000		508,750
3.750% 6/09/23		920,000		981,738
				1,531,671
Trucking & Leasing — 0.5%
DAE Funding LLC 4.000% 8/01/20 (a)		522,000		518,085
Penske Truck Leasing Co. LP/PTL Finance Corp. 4.875% 7/11/22 (a)		1,367,000		1,456,137
				1,974,222
TOTAL CORPORATE DEBT (Cost $178,813,131)				181,170,331
Municipal Obligations — 0.2%
Louisiana State Public Facilities Authority, Revenue Bonds, Series 2011-A, Class A2, 3 mo. USD LIBOR 1.891% FRN 4/26/27		37,045		36,971
Pennsylvania Higher Education Assistance Agency, Revenue Bonds, Series 2006-2, Class B, 28 day ARS 1.691% FRN 10/25/42		700,000		677,355
				714,326
TOTAL MUNICIPAL OBLIGATIONS (Cost $727,420)				714,326
Non-U.S. Government Agency Obligations — 52.8%
Auto Floor Plan ABS — 0.6%
Navistar Financial Dealer Note Master Owner Trust II Series 2019-1, Class C, 1 mo. USD LIBOR + .950% 1.135% FRN 5/25/24 (a)		856,000		843,271
Series 2018-1, Class C, 1 mo. USD LIBOR + 1.050% 1.235% FRN 9/25/23 (a)		280,000		277,519
Series 2019-1, Class D, 1 mo. USD LIBOR + 1.450% 1.635% FRN 5/25/24 (a)		768,000		756,224
Series 2018-1, Class D, 1 mo. USD LIBOR + 1.550% 1.735% FRN 9/25/23 (a)		471,000		466,596
				2,343,610
Automobile ABS — 7.8%
American Credit Acceptance Receivables Trust, Series 2019-1, Class C 3.500% 4/14/25 (a)		1,625,000		1,650,092
AmeriCredit Automobile Receivables Trust Series 2020-1, Class D, 1.800% 12/18/25		2,419,000		2,236,979
Series 2019-3, Class D, 2.580% 9/18/25		1,425,000		1,356,511
Avis Budget Rental Car Funding AESOP LLC Series 2020-1A, Class C, 3.020% 8/20/26 (a)		5,143,000		4,621,168
Series 2019-3A, Class C, 3.150% 3/20/26 (a)		2,764,000		2,566,415
Series 2019-1A, Class C, 4.530% 3/20/23 (a)		633,000		595,187
Series 2018-1A, Class C, 4.730% 9/20/24 (a)		1,270,000		1,193,034
Canadian Pacer Auto Receivables Trust, Series 2018-2A, Class B 3.630% 1/19/24 (a)		460,000		470,674
Carmax Auto Owner Trust, Series 2019-4, Class D 2.800% 4/15/26		1,399,000		1,303,752
Carvana Auto Receivables Trust, Series 2019-4A, Class D 3.070% 7/15/25 (a)		1,734,000		1,707,477
Drive Auto Receivables Trust, Series 2019-4, Class D 2.700% 2/16/27		1,333,000		1,332,800
DT Auto Owner Trust, Series 2019-1A, Class C 3.610% 11/15/24 (a)		240,000		242,078
Exeter Automobile Receivables Trust, Series 2019-3A, Class D 3.110% 8/15/25 (a)		985,000		981,895
Ford Credit Auto Owner Trust, Series 2020-1, Class C 2.540% 8/15/31 (a)		2,408,000		2,436,118
Hertz Fleet Lease Funding LP, Series 2019-1, Class D 3.440% 1/10/33 (a)		1,976,000		1,758,488
Hertz Vehicle Financing II LP, Series 2017-1A, Class B 3.560% 10/25/21 (a)		1,430,000		1,367,968
Hertz Vehicle Financing LLC, Series 2018-3A, Class B 4.370% 7/25/24 (a)		950,000		893,598
Hertz Vehicle Financing LP Series 2019-3A, Class B, 3.030% 12/26/25 (a)		1,036,000		987,701
Series 2018-1A, Class B, 3.600% 2/25/24 (a)		1,420,000		1,358,711
OneMain Direct Auto Receivables Trust, Series 2017-2A, Class C 2.820% 7/15/24 (a)		885,000		883,616
Santander Revolving Auto Loan Trust Series 2019-A, Class B, 2.800% 1/26/32 (a)		399,000		382,484
Series 2019-A, Class C, 3.000% 1/26/32 (a)		258,000		256,279
Series 2019-A, Class D, 3.450% 1/26/32 (a)		1,720,000		1,711,150
Westlake Automobile Receivables Trust, Series 2019-3A, Class E 3.590% 3/17/25 (a)		1,395,000		1,381,766
				33,675,941
Commercial MBS — 4.6%
BAMLL Commercial Mortgage Securities Trust Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.535% FRN 9/15/34 (a)		300,000		250,883
Series 2019-BPR, Class CMP, 4.024% VRN 11/05/32 (a) (c)		800,000		703,201

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

	Principal Amount		Value
Series 2019-BPR, Class DMP, 4.024% VRN 11/05/32 (a) (c)	$	1,110,000	$	887,130
Bear Stearns Commercial Mortgage Securities, Series 2007-T26, Class AM, 5.513% VRN 1/12/45 (c)		169,731		167,984
BHMS Mortgage Trust Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 7/15/35 (a)		1,880,000		1,776,681
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/15/35 (a)		2,600,000		2,398,663
BX Commercial Mortgage Trust Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.785% FRN 12/15/36 (a)		1,883,000		1,793,182
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.885% FRN 11/15/35 (a)		1,855,000		1,831,541
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 10/15/36 (a)		747,123		717,116
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.185% FRN 10/15/36 (a)		2,911,106		2,797,755
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150% 2.335% FRN 12/15/37 (a)		1,335,725		1,273,575
Commercial Mortgage Trust, Series 2015-DC1, Class B, 4.035% VRN 2/10/48 (c)		797,000		803,078
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600% 1.785% FRN 5/15/36 (a)		820,000		794,412
GS Mortgage Securities Trust, Series 2015-GC34, Class C, 4.806% VRN 10/10/48 (c)		1,100,000		941,258
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 5/15/36 (a)		739,000		710,407
Morgan Stanley Bank of America Merrill Lynch Trust, Series 2013-C7, Class B 3.769% 2/15/46		1,000,000		1,011,716
Morgan Stanley Capital I Trust, Series 2012-STAR, Class D 4.057% 8/05/34 (a)		1,000,000		965,164
MSCG Trust, Series 2018-SELF, Class C, 1 mo. USD LIBOR + 1.180% 1.365% FRN 10/15/37 (a)		185,000		176,186
				19,999,932
Home Equity ABS — 0.0%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + 0.240% 0.425% FRN 10/25/34 (a)		183,150		181,565
Other ABS — 24.0%
321 Henderson Receivables I LLC Series 2006-2A, Class A1, 1 mo. USD LIBOR + 0.200% 0.384% FRN 6/15/41 (a)		208,209		198,937
Series 2006-1A, Class A1, 1 mo. USD LIBOR + 0.200% 0.385% FRN 3/15/41 (a)		108,189		105,720
AASET Trust Series 2017-1A, Class A, 3.967% 5/16/42 (a)		217,890		183,689
Series 2020-1A, Class B, 4.335% 1/16/40 (a)		489,753		259,690
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		1,513,007		1,349,200
Adams Outdoor Advertising LP, Series 2018-1, Class A 4.810% 11/15/48 (a)		796,295		809,494
Arbor Realty Commercial Real Estate Notes, Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 6/15/28 (a)		880,000		863,612
Arbys Funding LLC, Series 2015-1A, Class A2 4.969% 10/30/45 (a)		811,750		823,140
Ascentium Equipment Receivables Trust, Series 2019-2A, Class E 3.780% 5/10/27 (a)		1,722,000		1,720,676
Avant Loans Funding Trust, Series 2019-A, Class A 3.480% 7/15/22 (a)		225,376		225,723
Bain Capital Credit CLO Ltd. 3 mo. USD LIBOR + 1.850% 0.739% FRN 7/19/31 (a)		1,000,000		1,001,047
Series 2016-2A, Class BR, 3 mo. USD LIBOR + 1.800% 3.019% FRN 1/15/29 (a)		500,000		486,462
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class A2R, 3 mo. USD LIBOR + 1.750% 2.969% FRN 1/15/29 (a)		1,500,000		1,447,245
BlueMountain CLO Ltd., Series 2013-1A, Class A1R2, 3 mo. USD LIBOR + 1.230% 2.365% FRN 1/20/29 (a)		990,698		979,433
BRE Grand Islander Timeshare Issuer LLC Series 2017-1A, Class A, 2.940% 5/25/29 (a)		251,425		252,455
Series 2019-A, Class B, 3.780% 9/26/33 (a)		715,007		706,427
CAL Funding II Ltd., Series 2018-2A, Class A 4.340% 9/25/43 (a)		651,750		646,130
Capital Automotive REIT, Series 2017-1A, Class A1 3.870% 4/15/47 (a)		583,443		581,372
CARS-DB4 LP, Series 2020-1A, Class B1 4.170% 2/15/50 (a)		1,100,000		968,488
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A 3.967% 4/15/39 (a)		401,675		351,360
Castlelake Aircraft Structured Trust, Series 2018-1, Class A 4.125% 6/15/43 (a)		713,585		662,590
Cbam CLO Management Cbam, Series 2018-6A, Class A1R, 3 mo. USD LIBOR + 1.270% 2.489% FRN 1/15/31 (a)		1,500,000		1,474,606
CIFC Funding IV Ltd., Series 2015-4A, Class A2R, 3 mo. USD LIBOR + 1.85%, 2.985% FRN 10/20/27 (a) (c)		300,000		293,229
CLI Funding LLC, Series 2019-1A, Class A 3.710% 5/18/44 (a)		727,777		716,067
CLI Funding V LLC, Series 2014-1A, Class A 3.290% 6/18/29 (a)		877,184		877,147
CLI Funding VI LLC, Series 2017-1A, Class A 3.620% 5/18/42 (a)		742,623		741,629
CNH Equipment Trust, Series 2020-A, Class B 2.300% 10/15/27		545,000		545,879
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460% 0.645% FRN 9/25/34		2,865		2,540
DB Master Finance LLC Series 2019-1A, Class A2I, 3.787% 5/20/49 (a)		627,260		647,025
Series 2019-1A, Class A2II, 4.021% 5/20/49 (a)		740,405		770,058
Diamond Resorts Owner Trust Series 2019-1A, Class A, 2.890% 2/20/32 (a)		1,130,745		1,127,000
Series 2016-1, Class A, 3.080% 11/20/28 (a)		431,267		431,366
Domino’s Pizza Master Issuer LLC Series 2017-1A, Class A2II, 3.082% 7/25/47 (a)		2,778,750		2,805,417
Series 2018-1A, Class A2I, 4.116% 7/25/48 (a)		953,025		1,012,460

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

	Principal Amount		Value
Elara HGV Timeshare Issuer LLC Series 2017-A, Class A, 2.690% 3/25/30 (a)	$	286,282	$	285,116
Series 2014-A, Class B, 3.020% VRN 2/25/27 (a) (c)		96,270		96,087
Series 2019-A, Class C, 3.450% 1/25/34 (a)		1,761,031		1,619,668
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450% 2.585% FRN 4/20/31 (a)		1,250,000		1,238,976
FCI Funding LLC, Series 2019-1A, Class A 3.630% 2/18/31 (a)		299,324		301,625
Global SC Finance IV Ltd., Series 2017-1A, Class A 3.850% 4/15/37 (a)		609,151		584,695
GoldentTree Loan Management US CLO 1 Ltd., Series 2017-1A, Class B1R, 3 mo. USD LIBOR + 1.450% 2.585% FRN 4/20/29 (a)		500,000		488,302
Goodgreen Trust Series 2019-2A, Class A, 2.760% 10/15/54 (a)		1,463,854		1,450,426
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		763,459		777,782
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		647,878		678,349
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (c)		1,291,996		1,343,862
Hero Funding Trust Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		818,297		837,181
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		188,618		194,815
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		477,784		500,269
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		155,391		163,644
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		916,651		980,590
Hilton Grand Vacations Trust Series 2019-AA, Class C, 2.840% 7/25/33 (a)		1,615,889		1,475,999
Series 2017-AA, Class B, 2.960% 12/26/28 (a)		331,407		311,745
Horizon Aircraft Finance I Ltd., Series 2018-1, Class A 4.458% 12/15/38 (a)		461,875		416,713
Horizon Aircraft Finance III Ltd, Series 2019-2, Class B 4.458% 11/15/39 (a)		1,757,143		972,793
KDAC Aviation Finance Ltd., Series 2017-1A, Class A 4.212% 12/15/42 (a)		385,110		326,649
KREF Ltd., Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.544% FRN 6/15/36 (a)		2,600,000		2,541,125
Lendmark Funding Trust, Series 2018-1A, Class A 3.810% 12/21/26 (a)		930,000		929,757
Lunar Aircraft Ltd., Series 2020-1A, Class A 3.376% 2/15/45 (a)		834,147		761,493
MACH 1 Cayman Ltd., Series 2019-1, Class A 3.474% 10/15/39 (a)		958,344		791,535
Mariner Finance Issuance Trust, Series 2018-AA, Class A 4.200% 11/20/30 (a)		2,063,000		2,038,813
Marlette Funding Trust Series 2019-2A, Class A, 3.130% 7/16/29 (a)		336,965		329,751
Series 2019-1A, Class A, 3.440% 4/16/29 (a)		83,838		83,048
Series 2019-2A, Class B, 3.530% 7/16/29 (a)		540,000		538,687
Milos CLO Ltd., Series 2017-1A, Class AR, 3 mo. USD LIBOR + 1.070% 2.205% FRN 10/20/30 (a)		1,150,000		1,122,378
Mosaic Solar Loans LLC Series 2018-2GS, Class A, 4.200% 2/22/44 (a)		670,411		693,569
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		155,627		158,769
Neuberger Berman CLO Ltd., Series 2015-20A, Class BR, 3 mo. USD LIBOR + 1.250% 2.469% FRN 1/15/28 (a)		1,500,000		1,447,713
New Residential Advance Receivables Trust Advance Receivables Backed Series 2019-T3, Class CT3, 2.710% 9/15/52 (a)		887,000		807,170
Series 2019-T4, Class DT4, 2.804% 10/15/51 (a)		1,921,000		1,709,690
Series 2019-T3, Class DT3, 3.055% 9/15/52 (a)		1,500,000		1,335,000
Series 2019-T2, Class DT2, 3.060% 8/15/53 (a)		579,000		550,778
NP SPE II LLC Series 2019-1A, Class A1, 2.574% 9/20/49 (a)		511,397		506,666
Series 2017-1A, Class A1, 3.372% 10/21/47 (a)		403,903		411,825
OCP CLO Ltd., Series 2015-8A, Class A2AR, 3 mo. USD LIBOR + 1.450% 2.585% FRN 4/17/27 (a)		2,150,000		2,115,858
OneMain Financial Issuance Trust Series 2019-2A, Class A, 3.140% 10/14/36 (a)		3,650,000		3,659,704
Series 2019-2A, Class C, 3.660% 10/14/36 (a)		1,550,000		1,309,838
Orange Lake Timeshare Trust Series 2016-A, Class B, 2.910% 3/08/29 (a)		449,492		384,722
Series 2019-A, Class D, 4.930% 4/09/38 (a)		1,420,528		1,304,942
Oxford Finance Funding Trust Series 2020-1A, Class A2, 3.101% 2/15/28 (a)		698,000		706,464
Series 2016-1A, Class A, 3.968% 6/17/24 (a)		129,931		130,512
Palmer Square CLO Ltd., Series 2015-1A, Class A2R2, 3 mo. USD LIBOR + 1.650% 2.024% FRN 5/21/29 (a)		1,250,000		1,229,945
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A 3.967% 6/15/44 (a)		690,084		593,268
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850% 3.035% FRN 2/25/23 (a)		670,000		656,649
Recette CLO Ltd., Series 2015-1A, Class CR, 3 mo. USD LIBOR + 1.700% 2.835% FRN 10/20/27 (a)		700,000		681,092
Rockford Tower CLO Ltd. Series 2017-1A, Class BR, 3 mo. USD LIBOR + 1.450% 2.669% FRN 4/15/29 (a)		550,000		528,938
Series 2017-2A, Class BR, 3 mo. USD LIBOR + 1.500% 2.719% FRN 10/15/29 (a)		1,000,000		960,425
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090% 2.309% FRN 1/15/30 (a)		1,250,000		1,220,670
SBA Tower Trust, Series 2014-2A, Class C, 3.869% STEP 10/15/49 (a)		1,030,000		1,087,713
Sierra Receivables Funding LLC Series 2016-3A, Class B, 2.630% 10/20/33 (a)		498,212		447,442
Series 2016-2A, Class B, 2.780% 7/20/33 (a)		781,385		776,593
Series 2019-3A, Class C, 3.000% 8/20/36 (a)		1,266,436		1,143,728
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		33,138		32,940
Series 2019-2A, Class C, 3.120% 5/20/36 (a)		173,767		158,087
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		929,423		846,164
Series 2018-1A, Class B, 4.236% 4/20/35		1,180,813		1,153,137
Series 2019-2A, Class D, 4.540% 5/20/36 (a)		718,029		662,473
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		690,089		643,277
SoFi Consumer Loan Program Trust, Series 2019-3, Class D 3.890% 5/25/28 (a)		2,981,000		2,638,278
Store Master Funding I-VII, Series 2018-1A, Class A3 4.400% 10/20/48 (a)		1,239,583		1,215,744
Taco Bell Funding LLC, Series 2018-1A, Class A2I 4.318% 11/25/48 (a)		2,285,200		2,329,233
TAL Advantage V LLC, Series 2014-2A, Class A2 3.330% 5/20/39 (a)		502,486		494,952
TAL Advantage VI LLC, Series 2017-1A, Class A 4.500% 4/20/42 (a)		854,101		852,032
TLF National Tax Lien Trust, Series 2017-1A, Class A 3.090% 12/15/29 (a)		944,060		950,132

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

	Principal Amount		Value
Trafigura Securitisation Finance PLC Series 2018-1A, Class A1, 1 mo. USD LIBOR + 0.730% 0.915% FRN 3/15/22 (a)	$	1,340,000	$	1,335,436
Series 2018-1A, Class B, 4.290% 3/15/22 (a)		1,870,000		1,862,896
Treman Park CLO Ltd., Series 2015-1A, Class ARR, 3 mo. USD LIBOR + 1.070% 2.205% FRN 10/20/28 (a)		1,100,000		1,086,995
Trinity Rail Leasing LP Series 2018-1A, Class A1, 3.820% 6/17/48 (a)		1,198,895		1,203,721
Series 2019-1A, Class A, 3.820% 4/17/49 (a)		1,585,709		1,616,885
Trip Rail Master Funding LLC Series 2017-1A, Class A1, 2.709% 8/15/47 (a)		162,981		163,058
Series 2011-1A, Class A2, 6.024% 7/15/41 (a)		2,246,612		2,340,842
Triton Container Finance LLC Series 2017-2A, Class A, 3.620% 8/20/42 (a)		1,826,041		1,845,148
Series 2018-2A, Class A, 4.190% 6/22/43 (a)		1,184,000		1,184,356
VSE VOI Mortgage LLC Series 2016-A, Class B, 2.740% 7/20/33 (a)		415,602		408,443
Series 2018-A, Class C, 4.020% 2/20/36 (a)		465,134		423,494
Welk Resorts LLC Series 2015-AA, Class A, 2.790% 6/16/31 (a)		101,682		100,808
Series 2017-AA, Class B, 3.410% 6/15/33 (a)		712,179		702,041
Willis Engine Structured Trust IV, Series 2018-A, Class A, 4.750% STEP 9/15/43 (a)		631,604		476,810
				103,536,251
Student Loans ABS — 9.6%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/25/58 (a)		530,000		462,805
College Avenue Student Loans LLC Series 2018-A, Class A1, 1 mo. USD LIBOR + 1.200% 1.385% FRN 12/26/47 (a)		1,282,166		1,196,931
Series 2019-A, Class B, 3.810% 12/28/48 (a)		1,038,000		1,002,697
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + 0.490% 1.709% FRN 1/15/37		512,355		435,824
Commonbond Student Loan Trust Series 2019-AGS, Class B, 3.040% 1/25/47 (a)		1,464,781		1,411,852
Series 2018-AGS, Class C, 3.820% 2/25/44 (a)		185,728		182,305
Series 2018-BGS, Class C, 4.120% 9/25/45 (a)		142,045		140,559
Series 2018-CGS, Class C, 4.350% 2/25/46 (a)		87,356		84,468
Series 2017-AGS, Class C, 5.280% 5/25/41 (a)		239,786		232,692
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B 2.500% 1/25/30 (a)		182,629		181,850
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050% 2.235% FRN 2/26/35 (a)		199,927		188,041
ECMC Group Student Loan Trust, Series 2018-2A, Class A, 1 mo. USD LIBOR + 0.800% 0.985% FRN 9/25/68 (a)		1,817,738		1,731,724
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150% 3.600% FRN 12/01/47 (a)		1,365,102		1,347,246
ELFI Graduate Loan Program LLC, Series 2018-A, Class B 4.000% 8/25/42 (a)		566,989		563,245
Laurel Road Prime Student Loan Trust Series 2017-C, Class B, 2.950% 11/25/42 (a)		418,373		414,621
Series 2019-A, Class BFX, 3.000% 10/25/48 (a)		522,946		524,860
Series 2017-B, Class CFX, 3.610% 8/25/42 (a)		452,896		436,954
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		546,147		542,089
Navient Student Loan Trust Series 2018-2A, Class A3, 1 mo. USD LIBOR + 0.750% 0.935% FRN 3/25/67 (a)		1,830,000		1,711,657
Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.800% 0.985% FRN 3/25/67 (a)		2,500,000		2,467,838
Series 2019-2A, Class A2, 1 mo. USD LIBOR + 1.000% 1.185% FRN 2/27/68 (a)		919,000		865,496
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 3/25/66 (a)		1,426,474		1,392,419
Series 2017-1A, Class A3, 1 mo. USD LIBOR + 1.150% 1.335% FRN 7/26/66 (a)		1,800,000		1,753,033
Nelnet Private Education Loan Trust Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.935% FRN 12/26/40 (a)		174,154		165,352
Series 2016-A, Class A1B, 3.600% 12/26/40 (a)		208,553		209,469
Nelnet Student Loan Trust Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.750% 0.935% FRN 9/27/66 (a)		1,950,000		1,899,298
Series 2007-2A, Class A4A2, 28 day ARS 1.497% FRN 6/25/35 (a)		2,800,000		2,462,294
Series 2018-5A, Class B, 1 mo. USD LIBOR + 1.450% 1.618% FRN 2/25/67 (a)		1,000,000		939,203
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 6/25/54 (a)		395,000		368,150
SLC Student Loan Trust, Series 2005-3, Class B, 3 mo. USD LIBOR + 0.250% 0.563% FRN 6/15/55		1,272,778		1,112,117
SLM Student Loan Trust Series 2006-2, Class R, 0.000% 1/25/41		3,391		1,732,983
Series 2003-11, Class B, 3 mo. USD LIBOR + 0.650% 0.963% FRN 12/15/38		369,191		327,586
Series 2006-7, Class B, 3 mo. USD LIBOR + 0.200% 1.191% FRN 1/27/42		2,991,209		2,647,979
Series 2005-6, Class B, 3 mo. USD LIBOR + 0.290% 1.281% FRN 1/25/44		1,296,799		1,014,569
Series 2005-9, Class B, 3 mo. USD LIBOR + 0.300% 1.291% FRN 1/25/41		956,791		843,658
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 1.301% FRN 1/25/55		466,000		414,451
SMB Private Education Loan Trust Series 2016-B, Class A2B, 1 mo. USD LIBOR + 1.450% 1.635% FRN 2/17/32 (a)		260,744		260,180
Series 2015-C, Class A3, 1 mo. USD LIBOR + 1.950% 2.135% FRN 8/16/32 (a)		1,350,000		1,313,286
SoFi Alternative Trust, Series 2019-C, Class PT, 4.853% VRN 1/25/45 (a) (c)		2,582,566		2,804,824
SoFi Professional Loan Program LLC Series 2017-D, Class R1, 0.000% 9/25/40 (a)		2,333,800		809,969
Series 2018-A, Class R1, 0.000% 2/25/42 (a)		1,928,100		929,952
Series 2018-B, Class R1, 0.000% 8/26/47 (a)		1,727,800		681,272
Series 2018-D, Class R1, 0.000% 2/25/48 (a)		2,069,700		504,386
Series 2019-A, Class R1, 0.000% 6/15/48 (a)		3,162,200		776,320
Series 2016-C, Class A2B, 2.360% 12/27/32 (a)		121,934		121,229
				41,609,733
WL Collateral CMO — 6.2%
Angel Oak Mortgage Trust Series 2018-3, Class A3, 3.238% VRN 5/25/59 (a) (c)		1,940,976		1,915,650
Series 2019-6, Class M1, 3.389% VRN 11/25/59 (a) (c)		1,900,000		1,825,796
Series 2017-3, Class M1, 3.900% VRN 11/25/47 (a) (c)		650,000		646,170
Bank of America Mortgage Securities, Series 2004-G, Class 2A7, 4.493% VRN 8/25/34 (c)		24,936		24,224

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

	Principal Amount		Value
Citigroup Mortgage Loan Trust Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (c)	$	1,055,368	$	1,050,830
Series 2019-IMC1, Class M1, 3.170% VRN 7/25/49 (a) (c)		1,798,000		1,638,115
Countrywide Home Loans, Inc. Series 2004-2, Class 1A1, 3.668% VRN 2/25/34 (c)		18,877		18,111
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (c)		4,821		4,560
Deephaven Residential Mortgage Trust Series 2018-1A, Class A2, 3.027% VRN 12/25/57 (a) (c)		457,797		456,541
Series 2019-4A, Class M1, 3.484% VRN 10/25/59 (a) (c)		1,300,000		1,244,824
Series 2018-2A, Class A3, 3.684% VRN 4/25/58 (a) (c)		1,069,794		1,066,533
Series 2018-3A, Class A3, 3.963% VRN 8/25/58 (a) (c)		267,699		267,955
Series 2018-4A, Class A3, 4.285% VRN 10/25/58 (a) (c)		1,007,366		1,013,056
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1, 3.487% VRN 8/25/34 (c)		7,251		7,271
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A, 3.687% VRN 8/25/34 (c)		45,822		44,908
JP Morgan Mortgage Trust Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (c)		531,730		538,239
Series 2018-4, Class A15, 3.500% VRN 10/25/48 (a) (c)		547,155		552,133
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (c)		713,681		726,240
Merrill Lynch Mortgage Investors, Inc. Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (c)		2,441		2,393
Series 2004-A1, Class IIA2, 3.707% VRN 2/25/34 (c)		69,445		67,007
Series 2003-A4, Class IA, 4.234% VRN 7/25/33 (c)		2,432		2,306
New Residential Mortgage Loan Trust Series 2019-NQM2, Class A3, 3.752% VRN 4/25/49 (a) (c)		692,443		703,418
Series 2019-NQM1, Class A3, 3.928% VRN 1/25/49 (a) (c)		1,180,316		1,201,695
Onslow Bay Financial LLC, Series 2020-INV1, Class A21, 3.500% VRN 12/25/49 (a) (c)		1,664,826		1,697,500
PSMC Trust Series 2018-1, Class A3, 3.500% VRN 2/25/48 (a) (c)		825,912		837,576
Series 2018-2, Class A3, 3.500% VRN 6/25/48 (a) (c)		727,355		736,849
Sequoia Mortgage Trust Series 2015-1, Class A6, 2.500% VRN 1/25/45 (a) (c)		300,588		301,270
Series 2018-5, Class A4, 3.500% VRN 5/25/48 (a) (c)		591,277		600,079
Series 2018-7, Class A4, 4.000% VRN 9/25/48 (a) (c)		149,746		150,755
Series 2019-1, Class A4, 4.000% VRN 2/25/49 (a) (c)		83,803		83,463
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (c)		1,372,537		1,346,601
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A, 3.673% VRN 3/25/34 (c)		25,297		24,851
TIAA Bank Mortgage Loan Trust, Series 2018-2, Class A4, 3.500% VRN 7/25/48 (a) (c)		371,383		374,381
Verus Securitization Trust Series 2020-1, Class M1, 3.021% VRN 1/25/60 (a) (c)		2,551,000		2,372,423
Series 2019-4, Class M1, 3.207% VRN 11/25/59 (a) (c)		1,100,000		1,039,722
Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (c)		1,535,624		1,534,720
Series 2019-INV3, Class M1, 3.279% VRN 11/25/59 (a) (c)		667,000		636,475
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400% 2.904% FRN 4/25/44		61,868		58,910
				26,813,550
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $238,673,605)				228,160,582
U.S. Government Agency Obligations and Instrumentalities — 0.7%
Collateralized Mortgage Obligations — 0.1%
Government National Mortgage Association Series 2014-131, Class BW 4.047% FRN 5/20/41(c)		272,083		281,752
Pass-Through Securities — 0.1%
Federal Home Loan Mortgage Corp. Pool #1Q0239, 1 year CMT + 2.214% 3.833% 3/01/37		127,131		133,847
Federal National Mortgage Association Pool #775539 12 mo. USD LIBOR + 1.636% 2.931% FRN 5/01/34		32,243		33,645
Pool #725692 1 year CMT + 2.137% 3.957% FRN 10/01/33		37,523		39,505
Pool #888586 1 year CMT + 2.195% 3.973% FRN 10/01/34		98,567		103,774
Pool #844564 5.500% 12/01/20		2,859		2,876
Government National Mortgage Association Pool #507545 7.500% 8/15/29		24,696		28,664
				342,311
Whole Loans — 0.5%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes, Series 2020-DNA3, Class M2 1.000% 6/25/50 (a) (b)		1,418,000		1,418,000
Federal National Mortgage Association Connecticut Avenue Securities Trust Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.335% FRN 9/25/31 (a)		105,421		104,174
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.485% FRN 8/25/31 (a)		687,419		676,729
				2,198,903
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $2,829,182)				2,822,966
U.S. Treasury Obligations — 0.4%
U.S. Treasury Bonds & Notes — 0.4%
U.S. Treasury Note 8.000% 11/15/21 (d)		1,720,000		1,904,990
TOTAL U.S. TREASURY OBLIGATIONS (Cost $1,962,681)				1,904,990
TOTAL BONDS & NOTES (Cost $423,006,019)				414,773,195
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $609,046)				400,632
TOTAL LONG-TERM INVESTMENTS (Cost $423,615,065)				415,173,827

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

	Principal Amount		Value
Short-Term Investments — 4.6%
Commercial Paper — 4.6%
American Honda Finance Corp. 1.833% 8/13/20	$	1,000,000	$	999,441
1.936% 8/21/20		3,000,000		2,997,825
Bayer Corp. 0.457% 8/03/20 (a)		4,000,000		3,998,712
Daimler Finance North America LLC 1.323% 8/27/20 (a)		1,000,000		999,244
1.606% 7/13/20 (a)		4,000,000		3,999,610
First Abu Dhabi Bank PJSC 0.304% 9/28/20 (a)		1,000,000		999,475
Harley-Davidson Funding Corp. 0.203% 7/08/20 (a)		2,000,000		1,999,875
0.457% 8/05/20 (a)		3,000,000		2,998,944
Lloyds Bank PLC 0.183% 7/30/20		1,000,000		999,792
				19,992,918
TOTAL SHORT-TERM INVESTMENTS (Cost $19,981,683)				19,992,918
TOTAL INVESTMENTS — 100.8% (Cost $443,596,748) (e)				435,166,745
Other Assets/(Liabilities) — (0.8)%				(3,337,589	)
NET ASSETS — 100.0%			$	431,829,156

Abbreviation Legend
ABS	Asset-Backed Security
ARS	Auction Rate Security
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
DAC	Designated Activity Company
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
PJSC	Public Joint Stock Company
SOFR	Secured Overnight Financing Rate
STEP	Step Up Bond
VRN	Variable Rate Note
WL	Whole Loan

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

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $269,525,674 or 62.41% of net assets.
(b)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(c)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at June 30, 2020.
(d)	A portion of this security is pledged/held as collateral for open derivatives.
(e)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi- Annually	USD	800,000	$	122,640	$	39,994	$	82,646
Put
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi- Annually	3-Month USD LIBOR BBA	Quarterly	USD	11,880,000	$	277,992	$	569,052	$	(291,060	)
									$	400,632	$	609,046	$	(208,414	)

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Note 10 Year	9/21/20		351	$	48,751,731		$	97,597
Short
90 Day Eurodollar	9/14/20		5	$	(1,218,984	)	$	(27,704	)
U.S. Treasury Ultra 10 Year	9/21/20		199		(31,253,245	)		(86,146	)
U.S. Treasury Note 2 Year	9/30/20		251		(55,423,192	)		(4,668	)
U.S. Treasury Note 5 Year	9/30/20		1,162		(145,719,470	)		(392,952	)
90 Day Eurodollar	12/14/20		5		(1,218,921	)		(27,454	)
90 Day Eurodollar	3/15/21		4		(975,487	)		(22,513	)
90 Day Eurodollar	9/13/21		8		(1,951,273	)		(45,227	)
90 Day Eurodollar	3/14/22		7		(1,706,839	)		(40,011	)
90 Day Eurodollar	9/19/22		6		(1,462,405	)		(34,295	)
90 Day Eurodollar	3/13/23		5		(1,217,921	)		(28,579	)
90 Day Eurodollar	12/18/23		7		(1,703,515	)		(39,223	)
90 Day Eurodollar	12/16/24		19		(4,618,125	)		(102,900	)
							$	(851,672	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 34†	1.000%	Quarterly	6/20/25	USD	2,000,000	$	(23,376	)	$	7,103	$	(30,479	)
CDX.NA.IG Series 34†	1.000%	Quarterly	6/20/25	USD	2,200,000		(26,180	)		9,567		(35,747	)
						$	(49,556	)	$	16,670	$	(66,226	)

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

Currency Legend
USD	U.S. Dollar

MassMutual Premier Inflation-Protected and Income Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	principal amount		Value
Bonds & Notes — 71.9%
Corporate Debt — 0.9%
Pharmaceuticals — 0.3%
Becton Dickinson and Co. 3 mo. USD LIBOR + 0.875% 1.181% FRN 12/29/20	$	1,020,000	$	1,020,066
Real Estate Investment Trusts (REITS) — 0.6%
SBA Tower Trust 3.156% 10/10/45 (a)		2,000,000		2,004,291
TOTAL CORPORATE DEBT (Cost $2,310,158)				3,024,357
Municipal Obligations — 0.5%
AccessLex Institute, Revenue Bonds, Series 2004-A, Class A3 1.699% FRN 7/01/39  (b)		450,000		443,524
Brazos Higher Education Authority, Inc., Revenue Bonds, Series 2006-2, Class B2 1.678% FRN 6/25/42  (b)		1,050,000		1,005,719
Northstar Education Finance, Inc., Revenue Bonds, 3 mo. USD LIBOR + 0.000% 0.987% FRN 4/28/30		128,238		128,088
				1,577,331
TOTAL MUNICIPAL OBLIGATIONS (Cost $1,607,797)				1,577,331
Non-U.S. Government Agency Obligations — 44.3%
Auto Floor Plan ABS — 1.0%
NextGear Floorplan Master Owner Trust, Series 2017-2A, Class A1, 1 mo. USD LIBOR + 0.680% 0.865% FRN 10/17/22 (a)		3,300,000		3,277,743
Automobile ABS — 9.4%
Avis Budget Rental Car Funding AESOP LLC Series 2019-1A, Class C, 4.530% 3/20/23 (a)		322,000		302,765
Series 2016-1A, Class C, 4.940% 6/20/22 (a)		1,150,000		1,103,558
CarMax Auto Owner Trust Series 2016-4, Class B, 1.920% 7/15/22		310,000		308,339
Series 2017-1, Class C, 2.840% 10/17/22		320,000		314,857
Exeter Automobile Receivables Trust Series 2020-2A, Class A, 1.130% 8/15/23 (a)		905,000		905,058
Series 2019-3A, Class A, 2.590% 9/15/22 (a)		246,241		246,789
Hertz Vehicle Financing II LP Series 2016-4A, Class B, 3.290% 7/25/22 (a)		2,000,000		1,895,570
Series 2017-1A, Class B, 3.560% 10/25/21 (a)		2,430,000		2,324,588
Series 2019-1A, Class B, 4.100% 3/25/23 (a)		2,000,000		1,916,713
Series 2015-3A, Class D, 5.330% 9/25/21 (a)		2,232,000		1,866,158
OneMain Direct Auto Receivables Trust Series 2017-2A, Class C, 2.820% 7/15/24 (a)		8,300,000		8,287,020
Series 2017-2A, Class E, 4.740% 11/14/25 (a)		900,000		896,448
Tesla Auto Lease Trust, Series 2018-B, Class A 3.710%  8/20/21 (a)		5,373,944		5,452,265
World Omni Auto Receivables Trust, Series 2019-C, Class A2B, 1 mo. USD LIBOR + 0.230% 0.415% FRN 2/15/23		5,846,900		5,846,900
				31,667,028
Commercial MBS — 2.3%
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/15/35 (a)		1,150,000		1,060,947
BX Commercial Mortgage Trust Series 2020-BXLP, Class E, 1 mo. USD LIBOR + 1.600% 1.785% FRN 12/15/36 (a)		1,200,000		1,142,761
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.885% FRN 11/15/35 (a)		1,449,000		1,430,675
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.185% FRN 10/15/36 (a)		2,340,731		2,249,589
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750% 1.935% FRN 12/15/37 (a)		250,836		242,062
DBJPM 17-C6 Mortgage Trust, Series 2017-C6, Class A1 1.907%  6/10/50		585,157		590,165
JP Morgan Chase Commercial Mortgage Securities Corp., Series 2018-LAQ, Class A, 1 mo. USD LIBOR + 1.000% 1.185% FRN 6/15/32 (a)		869,717		817,585
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 5/15/36 (a)		389,000		373,949
				7,907,733
Other ABS — 12.0%
321 Henderson Receivables I LLC, Series 2006-2A, Class A1, 1 mo. USD LIBOR + 0.200% 0.384% FRN 6/15/41 (a)		806,704		770,781
321 Henderson Receivables LLC Series 2006-3A, Class A1, 1 mo. USD LIBOR + 0.200% 0.385% FRN 9/15/41 (a)		104,253		102,277
Series 2007-1A, Class A1, 1 mo. USD LIBOR + 0.200% 0.385% FRN 3/15/42 (a)		445,641		430,407
AASET Trust Series 2017-1A, Class A, 3.967% 5/16/42 (a)		129,896		109,507
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		1,286,925		1,147,596
AIMCO CLO, Series 2015-AA, Class AR, 3 mo. USD LIBOR + 0.850% 2.069% FRN 1/15/28 (a)		1,438,724		1,418,362
Ameriquest Mortgage Securities, Inc. Asset-Backed Pass-Through Certificates, Series 2005-R10, Class M1, 1 mo. USD LIBOR + 0.410% 0.595% FRN 1/25/36		383,133		382,368
Arbor Realty Commercial Real Estate Notes, Series 2018-FL1, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 6/15/28 (a)		920,000		902,867
Avant Loans Funding Trust, Series 2019-B, Class A 2.720%  10/15/26 (a)		1,082,050		1,084,024

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

	Principal Amount		Value
Avery Point IV CLO Ltd., Series 2014-1A, Class AR, 3 mo. USD LIBOR + 1.100% 2.091% FRN 4/25/26 (a)	$	312,603	$	312,039
Carlyle Global Market Strategies CLO Ltd., Series 2013-2A, Class AR, 3 mo. USD LIBOR + 0.890% 2.025% FRN 1/18/29 (a)		1,880,000		1,848,442
Citigroup Mortgage Loan Trust, Inc., Series 2006-WFH3, Class M1, 1 mo. USD LIBOR + 0.290% 0.475% FRN 10/25/36		903,124		898,708
CLI Funding V LLC, Series 2013-1A, Class Note 2.830%  3/18/28 (a)		959,689		952,203
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460% 0.645% FRN 9/25/34		1,761		1,562
KREF Ltd. Series 2018-FL1, Class AS, 1 mo. USD LIBOR + 1.350% 1.544% FRN 6/15/36 (a)		1,520,000		1,485,581
Series 2018-FL1, Class D, 1 mo. USD LIBOR + 2.550% 2.744% FRN 6/15/36 (a)		2,110,000		1,998,782
LCM Ltd., 3 mo. USD LIBOR + 1.240% 2.459% FRN 7/15/27 (a)		1,200,000		1,185,485
Lendmark Funding Trust, Series 2018-1A, Class A 3.810%  12/21/26 (a)		410,000		409,893
Magnetite XVIII Ltd., Series 2016-18A, Class AR, 3 mo. USD LIBOR + 1.080% 1.472% FRN 11/15/28 (a)		3,000,000		2,955,882
Marlette Funding Trust, Series 2019-3A, Class A 2.690%  9/17/29 (a)		2,473,694		2,486,010
Neuberger Berman CLO XX Ltd., Series 2015-20A, Class AR, 3 mo. USD LIBOR + 0.800% 2.019% FRN 1/15/28 (a)		1,475,886		1,460,949
NP SPE II LLC, Series 2019-1A, Class A1 2.574%  9/20/49 (a)		325,274		322,264
OCP CLO Ltd., Series 2015-10A, Class A1R, 3 mo. USD LIBOR + 0.820% 1.811% FRN 10/26/27 (a)		1,098,667		1,089,607
Orange Lake Timeshare Trust Series 2014-AA, Class A, 2.290% 7/09/29 (a)		561,492		560,616
Series 2016-A, Class A, 2.610% 3/08/29 (a)		785,228		761,520
Oxford Finance Funding Trust, Series 2016-1A, Class A 3.968%  6/17/24 (a)		74,246		74,578
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850% 3.035% FRN 2/25/23 (a)		270,000		264,620
Sierra Receivables Funding LLC Series 2019-3A, Class C, 3.000% 8/20/36 (a)		2,269,031		2,049,179
Series 2019-1A, Class C, 3.770% 1/20/36 (a)		627,353		583,900
Series 2019-3A, Class D, 4.180% 8/20/36 (a)		569,193		518,204
Series 2018-1A, Class B, 4.236% 4/20/35		642,501		627,442
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		402,552		375,245
SoFi Consumer Loan Program  Trust Series 2017-4, Class A, 2.500% 5/26/26 (a)		370,785		373,011
Series 2017-6, Class A2, 2.820% 11/25/26 (a)		2,433,266		2,451,596
Series 2018-1, Class A2, 3.140% 2/25/27 (a)		2,558,211		2,579,268
Series 2016-1A, Class A, 3.260% 8/25/25 (a)		2,068,841		2,079,087
Series 2017-2, Class A, 3.280% 2/25/26 (a)		602,833		602,182
Textainer Marine Containers VII Ltd., Series 2018-1A, Class A 4.110%  7/20/43 (a)		689,600		689,416
Trafigura Securitisation Finance PLC, Series 2018-1A, Class A2 3.730%  3/15/22 (a)		1,000,000		1,018,742
Verizon Owner Trust., Series 2018-1A, Class A1A 2.820%  9/20/22 (a)		1,262,437		1,273,479
				40,637,681
Student Loans ABS — 11.8%
Chase Education Loan Trust, Series 2007-A, Class A4, 3 mo. USD LIBOR + 0.100% 0.406% FRN 6/28/39		3,009,970		2,589,028
College Loan Corp. Trust I, Series 2005-2, Class B, 3 mo. USD LIBOR + 0.490% 1.709% FRN 1/15/37		327,907		278,927
Commonbond Student Loan Trust, Series 2018-CGS, Class C 4.350%  2/25/46 (a)		43,678		42,234
DRB Prime Student Loan Trust Series 2016-R, Class A1, 1 mo. USD LIBOR + 1.900% 2.085% FRN 10/25/44 (a)		1,140,952		1,142,298
Series 2016-A, Class A1, 1 mo. USD LIBOR + 2.000% 2.185% FRN 4/25/40 (a)		276,194		260,559
ECMC Group Student Loan Trust Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.385% FRN 12/27/66 (a)		1,311,453		1,285,318
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 1.518% FRN 7/26/66 (a)		1,395,822		1,353,672
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, PRIME - 1.150% 3.600% FRN 12/01/47 (a)		426,594		421,015
Edsouth Indenture, No.10 LLC, Series 2015-2, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 12/25/58 (a)		750,000		711,385
Education Loan Asset-Backed Trust I, Series 2013-1, Class A1, 1 mo. USD LIBOR + 0.800% 0.985% FRN 6/25/26 (a)		261,941		261,271
ELFI Graduate Loan Program LLC, Series 2018-A, Class A1, 1 mo. USD LIBOR + 0.750% 0.935% FRN 8/25/42 (a)		1,470,043		1,366,737
Goal Capital Funding Trust, Series 2010-1, Class A, 3 mo. USD LIBOR + 0.700% 1.060% FRN 8/25/48 (a)		205,499		193,061
JP Morgan Student Loan Trust, Series 2007-A, Class B, 3 mo. USD LIBOR + 0.350% 1.237% FRN 6/28/39 (a)		298,181		262,490
Laurel Road Prime Student Loan Trust Series 2017-C, Class A1, 0.735% FRN 11/25/42 (a) (b)		102,660		97,357
Series 2019-A, Class A1FX, 2.340% 10/25/48 (a)		617,539		594,233
Series 2018-B, Class A2FX, 3.540% 5/26/43 (a)		3,934,501		3,732,093
Navient Student Loan Trust Series 2019-2A, Class A2, 1 mo. USD LIBOR + 1.000% 1.185% FRN 2/27/68 (a)		2,758,000		2,597,431
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 3/25/66 (a)		1,491,313		1,455,711
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 6/25/65 (a)		1,577,307		1,545,078
Series 2019-3A, Class B, 1 mo. USD LIBOR + 1.550% 1.735% FRN 7/25/68 (a)		2,550,000		1,945,457

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

	Principal Amount		Value
Nelnet Private Education Loan Trust, Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.935% FRN 12/26/40 (a)	$	153,531	$	145,771
Nelnet Student Loan Trust Series 2005-2, Class B, 3 mo. USD LIBOR + 0.170% 0.476% FRN 3/23/37		523,365		376,823
Series 2006-3, Class B, 3 mo. USD LIBOR + 0.250% 0.547% FRN 6/25/41		261,698		225,809
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.200% 1.191% FRN 1/25/38		397,390		341,290
Series 2004-3, Class B, 3 mo. USD LIBOR + 0.350% 1.341% FRN 10/25/40		668,679		597,501
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 6/25/41 (a)		295,000		277,999
SLC Student Loan Trust Series 2006-2, Class B, 3 mo. USD LIBOR + 0.230% 0.543% FRN 12/15/39		328,709		288,679
Series 2005-2, Class B, 3 mo. USD LIBOR + 0.280% 0.593% FRN 3/15/40		1,097,876		957,771
SLM Student Loan Trust Series 2003-11, Class B, 3 mo. USD LIBOR + 0.650% 0.963% FRN 12/15/38		251,721		223,354
Series 2006-4, Class B, 3 mo. USD LIBOR + 0.200% 1.191% FRN 1/25/70		213,674		190,666
Series 2006-5, Class B, 3 mo. USD LIBOR + 0.210% 1.201% FRN 10/25/40		263,283		235,500
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.220% 1.211% FRN 1/25/41		310,553		278,399
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 1.301% FRN 1/25/55		279,600		248,671
Series 2004-3, Class B, 3 mo. USD LIBOR + 0.470% 1.461% FRN 10/25/64		216,366		192,198
SMB Private Education Loan Trust Series 2019-A, Class A1, 1 mo. USD LIBOR + 0.350% 0.535% FRN 2/16/26 (a)		552,733		535,526
Series 2019-A, Class A2B, 1 mo. USD LIBOR + 0.870% 1.055% FRN 7/15/36 (a)		1,740,000		1,679,364
SoFi Alternative Trust, Series 2019-C, Class PT, 4.853% VRN 1/25/45 (a) (b)		1,497,139		1,625,985
SoFi Professional Loan Program LLC Series 2019-C, Class A1FX, 2.130% 11/16/48 (a)		1,365,918		1,374,802
Series 2016-B, Class A2B, 2.740% 10/25/32 (a)		4,905,057		4,784,693
Series 2018-D, Class A2FX, 3.600% 2/25/48 (a)		2,540,000		2,686,333
South Carolina Student Loan Corp., Series 2010-1, Class A2, 3 mo. USD LIBOR + 1.000% 1.991% FRN 7/25/25		450,893		450,894
				39,853,383
WL Collateral CMO — 7.8%
Angel Oak Mortgage Trust, Series 2018-3, Class A3, 3.238% VRN 5/25/59 (a) (b)		834,620		823,730
BRAVO Residential Funding Trust, Series 2019-NQM1, Class A1, 2.666% VRN 7/25/59 (a) (b)		7,147,320		7,123,115
CIM Trust, Series 2019-INV3, Class A11, 1 mo. USD LIBOR + 1.000% 1.118% FRN 8/25/49 (a)		3,263,226		3,249,055
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class A3, 3.030% VRN 7/25/49 (a) (b)		941,408		937,361
Deephaven Residential Mortgage Trust Series 2019-2A, Class A1, 3.558% VRN 4/25/59 (a) (b)		724,455		735,920
Series 2018-4A, Class A3, 4.285% VRN 10/25/58 (a) (b)		1,079,969		1,086,069
JP Morgan Mortgage Trust Series 2018-1, Class A5, 3.500% VRN 6/25/48 (a) (b)		241,695		244,654
Series 2018-3, Class A5, 3.500% VRN 9/25/48 (a) (b)		379,418		384,369
Series 2017-6, Class A5, 3.500% VRN 12/25/48 (a) (b)		301,615		306,923
New Residential Mortgage Loan Trust Series 2019-NQM2, Class A3, 3.752% VRN 4/25/49 (a) (b)		385,790		391,904
Series 2019-NQM1, Class A3, 3.928% VRN 1/25/49 (a) (b)		753,393		767,039
Onslow Bay Financial LLC, Series 2020-EXP1, Class 2A2, 1 mo. USD LIBOR + 0.950% 1.135% FRN 2/25/60 (a)		1,706,771		1,706,771
PSMC Trust, Series 2018-1, Class A3, 3.500% VRN 2/25/48 (a) (b)		314,633		319,077
Sequoia Mortgage Trust, Series 2018-3, Class A4, 3.500% VRN 3/25/48 (a) (b)		301,324		305,049
Starwood Mortgage Residential Trust, Series 2019-INV1, Class A3, 2.916% VRN 9/27/49 (a) (b)		1,043,657		1,023,936
Verus Securitization Trust Series 2019-INV2, Class A3, 3.219% VRN 7/25/59 (a) (b)		747,060		746,620
Series 2019-1, Class A1, 3.836% VRN 2/25/59 (a) (b)		2,078,254		2,126,572
Series 2019-1, Class A3, 4.040% VRN 2/25/59 (a) (b)		3,858,175		3,888,154
				26,166,318
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $153,112,598)				149,509,886
U.S. Government Agency Obligations and Instrumentalities — 3.0%
Whole Loans — 3.0%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes, Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.671% FRN 6/25/50 (a) (c)		10,160,000		10,160,000
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $10,160,000)				10,160,000
U.S. Treasury Obligations — 23.2%
U.S. Treasury Bonds & Notes — 23.2%
U.S. Treasury Inflation Index
0.125% 7/15/24		2,349,044		2,453,486
0.125% 10/15/24		8,695,998		9,107,476
0.125% 7/15/26		2,321,596		2,465,007
0.125% 1/15/30		7,974,000		8,614,328
0.250% 1/15/25		3,031,616		3,189,344
0.250% 7/15/29		2,656,758		2,906,363
0.250% 2/15/50		1,396,472		1,566,394
0.375% 7/15/25 (d)		2,595,360		2,771,644
0.375% 1/15/27		2,547,912		2,745,359
0.500% 4/15/24		3,507,960		3,686,779
0.500% 1/15/28		2,287,230		2,507,259
0.625% 4/15/23		3,737,397		3,886,022
0.625% 1/15/24		1,483,745		1,562,612
0.625% 1/15/26		3,129,883		3,388,653
0.750% 7/15/28		2,370,182		2,672,163
0.750% 2/15/42		1,248,412		1,493,772
0.750% 2/15/45		2,929,491		3,579,855
0.875% 1/15/29		3,656,232		4,165,389
0.875% 2/15/47		743,652		947,303
1.000% 2/15/49		2,552,896		3,402,107
1.375% 2/15/44		1,815,403		2,474,915
1.750% 1/15/28		1,468,932		1,752,198
2.000% 1/15/26		1,808,898		2,102,156
2.125% 2/15/40		830,543		1,223,589
2.125% 2/15/41		948,542		1,415,262
3.875% 4/15/29		1,403,649		1,983,894
				78,063,329
TOTAL U.S. TREASURY OBLIGATIONS (Cost $72,819,252)				78,063,329
TOTAL BONDS & NOTES (Cost $240,009,805)				242,334,903
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $1,137,772)				732,568
TOTAL LONG-TERM INVESTMENTS (Cost $241,147,577)				243,067,471

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

	Principal Amount		Value
Short-Term Investments — 30.6%
Commercial Paper — 30.6%
ABB Treasury Center USA, Inc. 1.833% 7/28/20 (a)	$	4,000,000	$	3,997,284
American Honda Finance Corp. 1.425% 9/04/20		4,000,000		3,995,893
Aon Corp. 2.708% 7/28/20 (a)		4,000,000		3,999,026
AstraZeneca PLC 2.059% 11/02/20 (a)		4,000,000		3,992,667
Avery Dennison Corp. 0.823% 8/19/20 (a)		4,000,000		3,997,683
BASF Aktiengesellschaft 0.457% 9/17/20 (a)		4,000,000		3,990,739
Bayer Corp. 2.608% 8/05/20 (a)		4,000,000		3,998,592
Boeing Co. 2.109% 11/10/20 (a)		4,000,000		3,971,597
British Aerospace Public Ltd. Co. 1.842% 9/08/20 (a)		4,000,000		3,996,135
Canadian Natural Resources Ltd. 0.914% 7/21/20 (a)		4,000,000		3,999,323
Carnival Corp. 2.151% 8/25/20 (a)		4,000,000		3,974,122
Daimler Fin NA 1.682% 9/24/20 (a)		4,000,000		3,995,002
Ei Dupont 0.835% 12/02/20 (a)		2,000,000		1,992,965
0.866% 12/09/20 (a)		2,000,000		1,992,440
Enbridge (US), Inc. 0.813% 9/14/20 (a)		4,000,000		3,995,719
Entergy Corp. 0.660% 9/15/20 (a)		1,400,000		1,398,161
Experian Finance PLC 0.457% 9/15/20 (a)		4,000,000		3,996,287
FMC Technologies, Inc. 2.237% 7/15/20 (a)		4,000,000		3,999,550
Harley-Davidson, Inc. 0.813% 8/13/20 (a)		4,000,000		3,998,069
Magellan Midstream Holdings LP 0.456% 7/22/20 (a)		4,000,000		3,999,284
Marriott International, Inc. 1.844% 9/28/20 (a)		4,000,000		3,972,700
Nutrien Ltd. 1.904% 9/16/20 (a)		4,000,000		3,995,580
Reckitt Benckiser Treasury Services 1.843% 9/14/20 (a)		3,500,000		3,497,916
Suncor Energy, Inc. 0.559% 10/05/20 (a)		4,000,000		3,993,857
Thomson Reuters Corp. 0.406% 7/24/20 (a)		4,000,000		3,999,035
Transcanada Pipelines Ltd. 0.345% 7/23/20 (a)		4,000,000		3,999,241
Walt Disney Co. 1.834% 8/04/20 (a)		2,500,000		2,499,594
Xylem, Inc. 2.102% 11/18/20 (a)		4,000,000		3,987,937
				103,226,398
TOTAL SHORT-TERM INVESTMENTS (Cost $103,130,338)				103,226,398
TOTAL INVESTMENTS — 102.7% (Cost $344,277,915) (e)				346,293,869
Other Assets/(Liabilities) — (2.7)%				(9,141,603	)
NET ASSETS — 100.0%			$	337,152,266

Abbreviation Legend
ABS	Asset-Backed Security
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
MBS	Mortgage-Backed Security
VRN	Variable Rate Note
WL	Whole Loan

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

Notes to Portfolio of Investments  

Percentages are stated as a percent of net assets.

(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $244,458,831 or 72.51% of net assets.
(b)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at June 30, 2020.
(c)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(d)	A portion of this security is pledged/held as collateral for open derivatives.
(e)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	1,219,750	$	186,988	$	60,978	$	126,010
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	14,190,000	$	366,102	$	709,401	$	(343,299	)
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	7,670,000		179,478		367,393		(187,915	)
										545,580		1,076,794		(531,214	)
									$	732,568	$	1,137,772	$	(405,204	)

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

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	9/21/20		44	$	7,854,672		$	2,078
U.S. Treasury Note 2 Year	9/30/20		43		9,490,072			5,537
U.S. Treasury Note 5 Year	9/30/20		20		2,507,117			7,727
							$	15,342
Short
U.S. Treasury Ultra 10 Year	9/21/20		55	$	(8,639,753	)	$	(21,888	)
U.S. Treasury Ultra Bond	9/21/20		21		(4,592,267	)		10,986
							$	(10,902	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund		Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 34†		1.000%	Quarterly	6/20/25	USD	1,600,000	$	(18,701	)	$	5,682	$	(24,383	)

OTC Interest Rate Swaps
Paid by the Fund		Received by the Fund
Rate/ Reference	Frequency	Rate/ Reference	Frequency	Counterparty	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
1.790%	Maturity	U.S. Consumer Price Index	Maturity	BNP Paribas SA	1/22/22	USD	3,400,000	$	(76,081	)	$	—	$	(76,081	)
1.823%	Maturity	U.S. Consumer Price Index	Maturity	BNP Paribas SA	2/04/22	USD	5,500,000		(129,377	)		—		(129,377	)
1.505%	Maturity	U.S. Consumer Price Index	Maturity	BNP Paribas SA	2/14/22	USD	6,000,000		(105,403	)		—		(105,403	)
1.180%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	6/22/22	USD	1,000,000		199			—		199
1.669%	Maturity	U.S. Consumer Price Index	Maturity	Goldman Sachs International	11/08/22	USD	2,500,000		(50,132	)		—		(50,132	)
								$	(360,794	)	$	—	$	(360,794	)

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

OTC Total Return Swaps
Paid by the Fund				Received by the Fund
Rate/ Reference	No. of Contracts/ Notional		Frequency	Rate/ Reference	No. of Contracts/ Notional	Frequency	Counterparty	Termination Date	Value		Upfront Premium Received (Paid)/ Received		Unrealized Appreciation (Depreciation)
1.00%	USD	56,910,635	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	171,545	Maturity	Barclays Bank PLC	10/30/20	$	886,268	$	—	$	886,268
1.74%	USD	25,773,818	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	79,532	Maturity	BNP Paribas SA	7/31/20		1,022,277		—		1,022,277
1.74%	USD	25,773,818	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	79,532	Maturity	Goldman Sachs International	7/31/20		1,022,277		—		1,022,277
1.40%	USD	38,850,986	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	118,249	Maturity	Goldman Sachs International	8/31/20		989,543		—		989,543
0.31%	USD	47,000,000	Maturity	Bloomberg Barclays US Treasury Inflation Notes TR Index	141,247	Maturity	Goldman Sachs International	11/30/20		588,944		—		588,944
									$	4,509,309	$	—	$	4,509,309

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

Currency Legend

USD U.S Dollar

MassMutual Premier Core Bond Fund — Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 0.2%
Preferred Stock — 0.2%
Financial — 0.2%
Insurance — 0.2%
The Allstate Corp., 3 mo. USD LIBOR + 3.165% 5.100% VRN 1/15/53		130,000	$	3,311,100
TOTAL PREFERRED STOCK (Cost $3,250,000)				3,311,100
TOTAL EQUITIES   (Cost $3,250,000)				3,311,100

	Principal Amount
Bonds & Notes — 99.8%
Corporate Debt — 39.5%
Aerospace & Defense — 0.1%
Raytheon Technologies Corp. 4.500% 6/01/42	$	1,375,000	1,713,679
Agriculture — 0.8%
BAT Capital Corp. 4.700% 4/02/27		1,175,000	1,342,952
4.758% 9/06/49		805,000	893,873
Bunge Ltd. Finance Corp. 3.250% 8/15/26		1,383,000	1,430,192
4.350% 3/15/24		2,120,000	2,316,660
Imperial Brands Finance PLC 3.500% 7/26/26 (a)		1,675,000	1,788,472
3.875% 7/26/29 (a)		1,842,000	1,939,401
Reynolds American, Inc. 5.850% 8/15/45		1,025,000	1,259,885
			10,971,435
Airlines — 0.1%
American Airlines Pass-Through Trust, Series 2014-1, Class B, 4.375% 4/01/24		160,514	115,398
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A, 4.100% 10/01/29		1,263,103	1,070,093
United Airlines Pass-Through Trust, Series 2018-1, Class B, 4.600% 9/01/27		474,779	355,702
			1,541,193
Auto Manufacturers — 1.7%
Ford Motor Credit Co. LLC 3.087% 1/09/23		1,790,000	1,704,975
4.140% 2/15/23		2,355,000	2,304,250
5.085% 1/07/21		1,163,000	1,161,895
General Motors Co. 4.200% 10/01/27		1,290,000	1,314,448
5.150% 4/01/38		785,000	752,403
General Motors Financial Co., Inc. 3.500% 11/07/24		2,990,000	3,029,973
4.150% 6/19/23		3,064,000	3,202,592
4.200% 11/06/21		1,466,000	1,503,414
Hyundai Capital America 2.850% 11/01/22 (a)		2,185,000	2,229,617
3.000% 2/10/27 (a)		5,775,000	5,703,772
			22,907,339
Banks — 5.8%
Associated Banc-Corp. 4.250% 1/15/25		2,580,000	2,705,600
Bank of America Corp. SOFR + 2.150% 2.592% VRN 4/29/31		1,730,000	1,830,592
3 mo. USD LIBOR + 1.060% 3.559% VRN 4/23/27		925,000	1,032,375
4.183% 11/25/27		1,380,000	1,579,352
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		1,125,000	1,367,064
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		615,000	725,371
6.110% 1/29/37		1,275,000	1,795,103
7.750% 5/14/38		1,055,000	1,724,733
The Bank of Nova Scotia 4.500% 12/16/25		1,885,000	2,141,747
3 mo. USD LIBOR + 2.648% 4.650% VRN (b)		3,550,000	3,348,040
Barclays Bank PLC 10.179% 6/12/21 (a)		5,444,000	5,887,114
Barclays PLC 3 mo. USD LIBOR + 1.380% 1.766% FRN 5/16/24		2,290,000	2,269,059
4.337% 1/10/28		1,600,000	1,776,273
BPCE SA 4.625% 7/11/24 (a)		1,600,000	1,745,106
Citigroup, Inc. 3.875% 3/26/25		1,846,000	2,012,393
4.450% 9/29/27		1,075,000	1,227,292
6.000% 10/31/33		510,000	672,881
6.625% 6/15/32		500,000	685,567
8.125% 7/15/39		225,000	389,659
Credit Suisse AG 6.500% 8/08/23 (a)		3,806,000	4,149,530
Deutsche Bank AG 3.150% 1/22/21		2,505,000	2,516,743
Discover Bank 5 year USD Swap + 1.730% 4.682% VRN 8/09/28		3,275,000	3,305,949
First Republic Bank 4.375% 8/01/46		4,530,000	5,261,156
Fulton Financial Corp. 3.600% 3/16/22		1,485,000	1,517,151
The Goldman Sachs Group, Inc. 4.250% 10/21/25		375,000	422,134
5.950% 1/15/27		1,333,000	1,651,426
6.250% 2/01/41		440,000	659,698
6.750% 10/01/37		1,065,000	1,550,494
HSBC Holdings PLC 4.250% 3/14/24		2,041,000	2,202,113

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.250% 8/18/25	$	1,328,000	$	1,448,869
JP Morgan Chase & Co. SOFR + 2.515% 2.956% VRN 5/13/31		1,350,000		1,431,788
5.600% 7/15/41		1,225,000		1,768,606
Lloyds Banking Group PLC 1 year CMT + 3.500% 3.870% VRN 7/09/25		1,815,000		1,970,925
Morgan Stanley 4.350% 9/08/26		3,925,000		4,525,841
5.000% 11/24/25		1,250,000		1,459,894
SVB Financial Group 3.125% 6/05/30		670,000		718,352
The Toronto-Dominion Bank 5 year USD Swap + 2.205% 3.625% VRN 9/15/31		1,500,000		1,687,545
Truist Bank 2.250% 3/11/30		1,755,000		1,771,427
Valley National Bancorp 5.125% 9/27/23		1,710,000		1,828,420
Wells Fargo & Co. 5.375% 11/02/43		851,000		1,153,121
5.606% 1/15/44		620,000		855,155
				78,771,658
Beverages — 0.6%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc. 4.900% 2/01/46		4,975,000		6,087,834
Molson Coors Beverage Co. 4.200% 7/15/46		1,689,000		1,643,614
5.000% 5/01/42		350,000		370,783
				8,102,231
Chemicals — 0.9%
CF Industries, Inc. 3.400% 12/01/21 (a)		650,000		662,733
DuPont de Nemours, Inc. 5.319% 11/15/38		2,075,000		2,630,822
Huntsman International LLC 5.125% 11/15/22		1,137,000		1,204,425
Syngenta Finance NV 4.441% 4/24/23 (a)		2,400,000		2,518,927
Yara International ASA 3.148% 6/04/30 (a)		500,000		516,877
4.750% 6/01/28 (a)		3,932,000		4,522,612
				12,056,396
Commercial Services — 0.2%
Cintas Corp. No 2 3.700% 4/01/27		1,675,000		1,902,344
ERAC USA Finance LLC 6.700% 6/01/34 (a)		355,000		454,707
PayPal Holdings, Inc. 3.250% 6/01/50		950,000		1,028,746
				3,385,797
Computers — 1.0%
Apple, Inc. 1.650% 5/11/30		1,560,000		1,594,542
2.650% 5/11/50		955,000		1,000,336
Dell International LLC/EMC Corp. 6.020% 6/15/26 (a)		3,164,000		3,627,448
Genpact Luxembourg Sarl 3.375% 12/01/24		4,235,000		4,370,263
3.700% STEP 4/01/22		2,295,000		2,356,470
Leidos, Inc. 4.375% 5/15/30 (a)		785,000		884,263
				13,833,322
Diversified Financial Services — 3.1%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 4.500% 9/15/23 (c)		1,840,000		1,840,216
6.500% 7/15/25		885,000		927,927
Aircastle Ltd. 4.400% 9/25/23		3,835,000		3,720,286
5.000% 4/01/23		1,950,000		1,899,931
Antares Holdings LP 6.000% 8/15/23 (a)		3,935,000		3,774,417
8.500% 5/18/25 (a)		1,185,000		1,183,330
Ares Finance Co. LLC 4.000% 10/08/24 (a)		2,380,000		2,525,427
Avolon Holdings Funding Ltd. 3.250% 2/15/27 (a)		1,740,000		1,405,443
Brookfield Finance, Inc. 4.350% 4/15/30		4,185,000		4,745,820
4.850% 3/29/29		2,168,000		2,551,845
GE Capital International Funding Co. Unlimited Co. 4.418% 11/15/35		790,000		803,235
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (a)		1,725,000		1,155,750
Lazard Group LLC 3.625% 3/01/27		1,209,000		1,269,254
3.750% 2/13/25		210,000		222,972
4.500% 9/19/28		2,055,000		2,317,863
LeasePlan Corp. NV 2.875% 10/24/24 (a)		1,930,000		1,973,454
Legg Mason, Inc. 5.625% 1/15/44		1,161,000		1,429,294
Park Aerospace Holdings Ltd. 4.500% 3/15/23 (a)		2,225,000		2,029,854
5.250% 8/15/22 (a)		6,015,000		5,646,118
5.500% 2/15/24 (a)		685,000		626,665
				42,049,101
Electric — 1.5%
Appalachian Power Co. 4.500% 3/01/49		1,500,000		1,860,292
Avangrid, Inc. 3.800% 6/01/29		1,931,000		2,235,488
CenterPoint Energy, Inc. 4.250% 11/01/28		2,000,000		2,325,466
The Cleveland Electric Illuminating Co. 5.950% 12/15/36		589,000		761,757
CMS Energy Corp. 4.700% 3/31/43		655,000		787,670
4.875% 3/01/44		700,000		908,264

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Duke Energy Progress, Inc. 6.125% 9/15/33	$	37,000	$	50,906
Infraestructura Energetica Nova SAB de CV 3.750% 1/14/28 (a)		1,505,000		1,474,900
IPALCO Enterprises, Inc. 3.700% 9/01/24		2,040,000		2,180,962
ITC Holdings Corp. 2.950% 5/14/30 (a)		1,220,000		1,299,389
Nevada Power Co. 6.650% 4/01/36		1,000,000		1,418,036
Oncor Electric Delivery Co. 7.500% 9/01/38		130,000		212,246
Pacific Gas and Electric Co. 2.500% 2/01/31		1,035,000		1,012,572
PPL Capital Funding, Inc. 4.000% 9/15/47		1,050,000		1,133,054
Southwestern Electric Power Co. 6.200% 3/15/40		1,815,000		2,496,116
				20,157,118
Electronics — 0.1%
Arrow Electronics, Inc. 5.125% 3/01/21		750,000		766,414
Environmental Controls — 0.1%
Waste Management, Inc. 3.450% 6/15/29		979,000		1,008,442
Foods — 0.4%
Ingredion, Inc. 3.200% 10/01/26		765,000		828,798
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30 (a)		928,000		951,200
Kraft Heinz Foods Co. 3.950% 7/15/25		791,000		839,276
Mars, Inc. 3.950% 4/01/49 (a)		2,185,000		2,722,368
				5,341,642
Forest Products & Paper — 0.1%
Fibria Overseas Finance Ltd. 4.000% 1/14/25		1,225,000		1,260,537
Gas — 0.3%
CenterPoint Energy Resources Corp. 6.625% 11/01/37		1,500,000		2,119,670
NiSource, Inc. 4.800% 2/15/44		1,350,000		1,650,662
				3,770,332
Health Care – Products — 0.1%
Dentsply Sirona, Inc. 3.250% 6/01/30		820,000		862,080
Health Care – Services — 0.4%
Advocate Health & Hospitals Corp. 3.829% 8/15/28		960,000		1,087,960
City of Hope 4.378% 8/15/48		1,275,000		1,559,159
Humana, Inc. 4.800% 3/15/47		780,000		1,016,732
UnitedHealth Group, Inc. 3.125% 5/15/60		1,150,000		1,231,066
				4,894,917
Insurance — 5.6%
Allstate Corp. 3 mo. USD LIBOR + 2.938% 5.750% VRN 8/15/53		4,970,000		5,134,209
American International Group, Inc. 3.400% 6/30/30		840,000		908,177
4.200% 4/01/28		1,300,000		1,472,297
4.500% 7/16/44		1,200,000		1,397,972
4.750% 4/01/48		450,000		542,573
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		3,920,000		4,045,803
AmTrust Financial Services, Inc. 6.125% 8/15/23		4,330,000		4,017,547
Arch Capital Group US, Inc. 5.144% 11/01/43		500,000		626,987
Athene Global Funding 2.500% 1/14/25 (a)		3,535,000		3,529,424
Athene Holding Ltd. 4.125% 1/12/28		8,157,000		8,414,950
6.150% 4/03/30		590,000		679,115
AXIS Specialty Finance LLC 3.900% 7/15/29		1,505,000		1,609,243
5 year CMT + 3.186% 4.900% VRN 1/15/40		1,670,000		1,565,625
AXIS Specialty Finance PLC 4.000% 12/06/27		2,760,000		2,903,100
Brighthouse Financial, Inc. 3.700% 6/22/27		1,600,000		1,631,136
4.700% 6/22/47		1,525,000		1,386,170
Brown & Brown, Inc. 4.200% 9/15/24		1,278,000		1,385,768
CNO Financial Group, Inc. 5.250% 5/30/25		3,264,000		3,612,505
Enstar Group Ltd. 4.500% 3/10/22		1,815,000		1,838,820
4.950% 6/01/29		2,050,000		2,159,020
Equitable Financial Life Global Funding 1.400% 7/07/25 (a) (c)		1,460,000		1,460,856
Equitable Holdings, Inc. 5.000% 4/20/48		1,250,000		1,430,140
Markel Corp. 3.350% 9/17/29		715,000		763,413
Metropolitan Life Global Funding I 2.950% 4/09/30 (a)		2,530,000		2,772,581
New York Life Insurance Co. 3.750% 5/15/50 (a)		695,000		784,885
The Progressive Corp. 3 mo. USD LIBOR + 2.539% 5.375% VRN (b)		1,950,000		1,930,500
Prudential Financial, Inc. 3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		1,300,000		1,383,200
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		3,380,000		3,788,152
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		650,000		691,860

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Reinsurance Group of America, Inc. 3.150% 6/15/30	$	1,590,000	$	1,649,595
Teachers Insurance & Annuity Association of America 4.270% 5/15/47 (a)		1,025,000		1,216,578
USF&G Capital I 8.500% 12/15/45 (a)		1,015,000		1,601,554
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084% 4.700% VRN 1/23/48		1,010,000		949,400
Willis North America, Inc. 2.950% 9/15/29		1,200,000		1,270,269
4.500% 9/15/28		2,135,000		2,488,909
XLIT Ltd. 4.450% 3/31/25		2,564,000		2,888,284
				75,930,617
Internet — 0.2%
Amazon.com, Inc. 4.050% 8/22/47		2,055,000		2,673,324
Investment Companies — 1.3%
Ares Capital Corp. 3.500% 2/10/23		3,465,000		3,482,714
4.200% 6/10/24		2,100,000		2,150,257
BlackRock TCP Capital Corp. 3.900% 8/23/24		4,215,000		4,114,092
4.125% 8/11/22		2,810,000		2,817,046
Sixth Street Specialty Lending, Inc. 3.875% 11/01/24		4,505,000		4,494,039
				17,058,148
Iron & Steel — 0.2%
Vale Overseas Ltd. 6.250% 8/10/26		1,550,000		1,823,187
6.875% 11/21/36		825,000		1,077,863
				2,901,050
Machinery – Construction & Mining — 0.1%
Caterpillar, Inc. 3.250% 4/09/50		1,065,000		1,187,197
Machinery – Diversified — 0.3%
CNH Industrial Capital LLC 1.950% 7/02/23 (c)		755,000		759,955
3.875% 10/15/21		2,870,000		2,941,381
				3,701,336
Media — 1.2%
Charter Communications Operating LLC/Charter Communications Operating Capital 6.484% 10/23/45		1,905,000		2,518,880
Comcast Corp. 3.400% 7/15/46		1,450,000		1,610,852
3.450% 2/01/50		1,675,000		1,921,484
3.969% 11/01/47		660,000		782,545
4.750% 3/01/44		925,000		1,217,819
Discovery Communications LLC 3.950% 3/20/28		1,907,000		2,130,973
4.650% 5/15/50		705,000		804,379
5.000% 9/20/37		975,000		1,153,988
Grupo Televisa SAB 6.625% 3/18/25		2,637,000		3,101,451
Time Warner Cable, Inc. 6.750% 6/15/39		655,000		870,367
				16,112,738
Mining — 1.1%
Glencore Finance Canada Ltd. 5.550% STEP 10/25/42 (a)		857,000		922,929
Glencore Funding LLC 3.875% 10/27/27 (a)		950,000		1,009,774
4.000% 4/16/25 (a)		2,150,000		2,336,358
4.625% 4/29/24 (a)		4,085,000		4,471,474
Kinross Gold Corp. 4.500% 7/15/27		996,000		1,086,378
5.125% 9/01/21		3,325,000		3,417,048
Teck Resources Ltd. 6.000% 8/15/40		1,075,000		1,138,375
				14,382,336
Miscellaneous - Manufacturing — 0.2%
Carlisle Cos., Inc. 2.750% 3/01/30		1,793,000		1,845,481
General Electric Co. 6.875% 1/10/39		429,000		527,017
				2,372,498
Oil & Gas — 2.2%
Cenovus Energy, Inc. 4.250% 4/15/27		1,475,000		1,335,892
6.750% 11/15/39		1,176,000		1,145,027
Diamondback Energy, Inc. 2.875% 12/01/24		2,275,000		2,276,315
3.250% 12/01/26		1,420,000		1,427,724
EOG Resources, Inc. 4.950% 4/15/50		210,000		267,870
EQT Corp. 3.900% 10/01/27		5,620,000		4,565,070
6.125% STEP 2/01/25		2,200,000		2,192,344
Marathon Petroleum Corp. 4.500% 4/01/48		495,000		505,448
4.750% 9/15/44		625,000		651,536
6.500% 3/01/41		1,060,000		1,312,048
Newfield Exploration Co. 5.375% 1/01/26		1,875,000		1,755,811
5.625% 7/01/24		1,200,000		1,146,658
5.750% 1/30/22		2,110,000		2,114,023
Occidental Petroleum Corp. 6.600% 3/15/46		1,228,000		1,068,937
Ovintiv, Inc. 6.500% 2/01/38		530,000		456,527
Patterson-UTI Energy, Inc. 3.950% 2/01/28		2,060,000		1,555,458

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Petroleos Mexicanos
5.350% 2/12/28	$	1,925,000	$	1,617,000
6.375% 1/23/45		640,000		477,408
6.500% 3/13/27		295,000		266,243
6.625% 6/15/38		202,000		157,204
Saudi Arabian Oil Co. 4.250% 4/16/39 (a)		2,580,000		2,870,098
				29,164,641
Oil & Gas Services — 0.3%
National Oilwell Varco, Inc.
3.600% 12/01/29		2,155,000		2,108,731
3.950% 12/01/42		1,778,000		1,485,904
				3,594,635
Packaging & Containers — 0.4%
Amcor Finance USA, Inc.
3.625% 4/28/26		3,960,000		4,341,885
WRKCo, Inc.
3.000% 6/15/33		890,000		927,006
				5,268,891
Pharmaceuticals — 1.7%
AbbVie, Inc.
4.050% 11/21/39 (a)		1,345,000		1,572,924
4.700% 5/14/45		1,465,000		1,841,514
Bristol-Myers Squibb Co.
4.350% 11/15/47 (a)		1,150,000		1,518,649
Cigna Corp.
4.800% 7/15/46 (a)		1,105,000		1,387,393
CVS Health Corp.
4.300% 3/25/28		1,325,000		1,549,678
5.050% 3/25/48		370,000		484,660
6.125% 9/15/39		895,000		1,273,849
CVS Pass-Through Trust
5.926% 1/10/34 (a)		1,820,241		2,035,004
McKesson Corp.
4.883% 3/15/44		800,000		967,668
Mylan NV
3.950% 6/15/26		2,765,000		3,091,413
5.250% 6/15/46		1,750,000		2,169,931
Takeda Pharmaceutical Co. Ltd.
3.375% 7/09/60 (c)		1,300,000		1,298,053
Teva Pharmaceutical Finance Netherlands III BV
2.200% 7/21/21		1,352,000		1,324,473
Upjohn, Inc.
2.700% 6/22/30 (a)		1,650,000		1,693,382
Zoetis, Inc.
4.450% 8/20/48		505,000		651,614
				22,860,205
Pipelines — 2.1%
Cheniere Energy Partners LP
4.500% 10/01/29 (c)		1,440,000		1,478,997
Energy Transfer Operating LP
4.200% 4/15/27		2,425,000		2,535,224
5.875% 1/15/24		1,125,000		1,252,466
6.125% 12/15/45		1,385,000		1,427,411
3 mo. USD LIBOR + 4.028% 6.250% VRN (b)		2,635,000		2,022,362
EnLink Midstream Partners LP
4.150% 6/01/25		2,972,000		2,288,440
4.850% 7/15/26		996,000		737,339
Enterprise Products Operating LLC
3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		1,000,000		935,000
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		1,120,000		1,002,400
EQM Midstream Partners LP
4.750% 7/15/23		2,870,000		2,889,315
MPLX LP
4.500% 4/15/38		1,115,000		1,115,210
6.250% 10/15/22		624,000		631,184
3 mo. USD LIBOR + 4.652% 6.875% VRN (b)		3,550,000		3,159,500
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110%
6.125% VRN (b)		2,590,000		1,848,613
Plains All American Pipeline LP/PAA Finance Corp.
3.800% 9/15/30		1,570,000		1,538,250
4.500% 12/15/26		589,000		617,666
4.700% 6/15/44		1,525,000		1,389,964
6.650% 1/15/37		475,000		515,638
Sunoco Logistics Partners Operations LP
5.300% 4/01/44		500,000		478,876
				27,863,855
Private Equity — 0.5%
Apollo Management Holdings LP 5 year CMT + 3.266%
4.950% VRN 1/14/50 (a)		1,045,000		939,816
Carlyle Finance Subsidiary LLC
3.500% 9/19/29 (a)		1,345,000		1,394,320
Hercules Capital, Inc.
4.625% 10/23/22		3,220,000		3,102,177
KKR Group Finance Co. VI LLC
3.750% 7/01/29 (a)		1,480,000		1,699,062
				7,135,375
Real Estate Investment Trusts (REITS) — 2.0%
Alexandria Real Estate Equities, Inc.
2.750% 12/15/29		1,035,000		1,104,089
American Tower Trust #1
3.652% 3/15/48 (a)		1,810,000		1,954,111
Crown Castle International Corp.
5.200% 2/15/49		729,000		966,799
Healthcare Trust of America Holdings LP
3.500% 8/01/26		2,375,000		2,565,922
Highwoods Realty LP
4.125% 3/15/28		625,000		668,464
Service Properties Trust
4.500% 6/15/23		953,000		912,432
4.950% 10/01/29		1,445,000		1,225,543
Spirit Realty LP
3.200% 1/15/27		2,455,000		2,345,298
3.400% 1/15/30		490,000		463,671
4.000% 7/15/29		2,405,000		2,370,166
4.450% 9/15/26		298,000		308,890

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Store Capital Corp.
4.625% 3/15/29	$	1,733,000	$	1,772,036
Tanger Properties LP
3.875% 12/01/23		1,777,000		1,746,103
UDR, Inc.
3.200% 1/15/30		950,000		1,035,373
Vereit Operating Partnership LP
3.100% 12/15/29		3,615,000		3,484,151
3.400% 1/15/28		710,000		715,480
4.625% 11/01/25		2,525,000		2,730,460
WP Carey, Inc.
4.250% 10/01/26		1,036,000		1,130,991
				27,499,979
Retail — 0.5%
El Puerto de Liverpool SAB de CV
3.950% 10/02/24 (a)		3,375,000		3,442,871
O'Reilly Automotive, Inc.
4.200% 4/01/30		1,205,000		1,411,114
Starbucks Corp.
2.550% 11/15/30		2,205,000		2,312,930
				7,166,915
Semiconductors — 0.2%
KLA Corp.
3.300% 3/01/50		2,240,000		2,313,661
Software — 0.6%
Broadridge Financial Solutions, Inc.
2.900% 12/01/29		1,600,000		1,710,244
Microsoft Corp.
4.450% 11/03/45		2,560,000		3,481,181
Oracle Corp.
2.950% 4/01/30		1,600,000		1,781,818
3.600% 4/01/50		1,215,000		1,352,149
				8,325,392
Telecommunications — 1.1%
AT&T, Inc.
2.300% 6/01/27		1,240,000		1,283,735
4.750% 5/15/46		4,225,000		5,065,099
5.250% 3/01/37		1,713,000		2,118,040
6.250% 3/29/41		15,000		20,567
Crown Castle Towers LLC
4.241% 7/15/48 (a)		1,750,000		2,002,140
Qwest Corp
6.750% 12/01/21		908,000		959,580
T-Mobile USA, Inc.
2.050% 2/15/28 (a)		1,370,000		1,370,644
Telefonica Emisiones SAU
4.665% 3/06/38		1,040,000		1,244,669
Verizon Communications, Inc.
6.550% 9/15/43		996,000		1,583,755
				15,648,229
Transportation — 0.4%
Autoridad del Canal de Panama
4.950% 7/29/35 (a)		1,340,000		1,527,614
CSX Corp.
4.750% 11/15/48		820,000		1,088,669
Kansas City Southern
2.875% 11/15/29		840,000		886,618
Norfolk Southern Corp.
4.050% 8/15/52		1,180,000		1,411,022
Pacific National Finance Pty Ltd.
4.625% 9/23/20 (a)		845,000		849,883
				5,763,806
TOTAL CORPORATE DEBT (Cost $507,520,246)				532,318,461
Municipal Obligations — 0.5%
JobsOhio Beverage System Series B, Revenue Bonds
4.532% 1/01/35		3,050,000		3,805,851
New York City Water & Sewer System, Revenue Bonds
5.882% 6/15/44		390,000		612,132
State of California BAB, General Obligation
7.600% 11/01/40		900,000		1,652,193
				6,070,176
TOTAL MUNICIPAL OBLIGATIONS (Cost $5,081,985)				6,070,176
Non-U.S. Government Agency Obligations — 32.7%
Automobile ABS — 1.1%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C
4.530% 3/20/23 (a)		1,577,000		1,482,797
Carvana Auto Receivables Trust, Series 2019-4A, Class D
3.070% 7/15/25 (a)		2,109,000		2,076,742
Hertz Vehicle Financing LP
Series 2019-3A, Class B, 3.030% 12/26/25 (a)		2,938,000		2,801,028
Series 2019-3A, Class C, 3.430% 12/26/25 (a)		2,971,400		2,666,327
OneMain Direct Auto Receivables Trust, Series 2019-1A, Class B
3.950% 11/14/28 (a)		2,383,000		2,368,505
Santander Revolving Auto Loan Trust
Series 2019-A, Class B, 2.800% 1/26/32 (a)		1,111,000		1,065,012
Series 2019-A, Class C, 3.000% 1/26/32 (a)		717,000		712,218
Series 2019-A, Class D, 3.450% 1/26/32 (a)		1,408,000		1,400,756
				14,573,385
Commercial MBS — 5.9%
Aventura Mall Trust, Series 2018-AVM, Class C,
4.249% VRN 7/05/40 (a) (d)		4,140,000		3,884,612
BAMLL Commercial Mortgage Securities Trust, Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350%
1.535% FRN 9/15/34 (a)		760,000		635,571
BANK
Series 2019-BN17, Class B, 4.128% VRN 4/15/52 (d)		917,000		986,194
Series 2019-BN16, Class AS, 4.267% 2/15/52		822,500		946,620
Series 2019-BN16, Class B, 4.438% VRN 2/15/52 (d)		684,276		714,972

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
BBCMS Mortgage Trust
Series 2020-C7, Class AS, 2.444% 4/15/53	$	1,784,000	$	1,847,602
Series 2018-CHRS, Class B, 4.409% VRN 8/05/38 (a) (d)		2,200,000		1,864,940
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38 (a) (d)		1,590,000		1,223,976
Series 2018-CHRS, Class D, 4.409% VRN 8/05/38 (a) (d)		1,220,000		856,324
Benchmark Mortgage Trust
Series 2019-B14, Class AS, 3.352% 12/15/62		3,650,000		3,965,793
Series 2019-B9, Class A4, 3.751% 3/15/52		5,243,000		6,046,438
Series 2019-B9, Class A5, 4.016% 3/15/52		6,400,000		7,563,818
BHMS Mortgage Trust
Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 7/15/35 (a)		5,180,000		4,895,324
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/15/35 (a)		4,800,000		4,428,301
BX Commercial Mortgage Trust
Series 2018-IND, Class B, 1 mo. USD LIBOR + .900% 1.085% FRN 11/15/35 (a)		770,000		762,211
Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.885% FRN 11/15/35 (a)		2,142,000		2,114,912
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 10/15/36 (a)		2,054,111		1,971,609
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.185% FRN 10/15/36 (a)		2,497,417		2,400,174
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class D, 1 mo. USD LIBOR + 1.750%
1.935% FRN 12/15/37 (a)		1,104,426		1,065,793
Century Plaza Towers
Series 2019-CPT, Class D, 3.097% VRN 11/13/39 (a) (d)		1,256,000		1,232,105
Series 2019-CPT, Class E, 3.097% VRN 11/13/39 (a) (d)		1,961,000		1,769,165
Citigroup Commercial Mortgage Trust, Series 2019-GC41, Class C
3.502% 8/10/56		1,259,000		1,135,501
Commercial Mortgage Pass-Through Certificates
Series 2015-CR23, Class B, 4.183% VRN 5/10/48 (d)		1,200,000		1,240,654
Series 2015-CR23, Class C, 4.435% VRN 5/10/48 (d)		1,050,000		1,037,649
DBUBS Mortgage Trust, Series 2011-LC1A, Class B,
5.471% VRN 11/10/46 (a) (d)		860,000		866,051
GS Mortgage Securities Trust
Series 2019-GC39, Class C, 4.005% VRN 5/10/52 (d)		1,357,000		1,221,372
Series 2012-GC6, Class AS, 4.948% 1/10/45 (a)		800,000		795,746
Jackson Park Trust, Series 2019-LIC, Class C,
3.131% VRN 10/14/39 (a) (d)		2,900,000		2,936,098
JPMBB Commercial Mortgage Securities Trust, Series 2015-C27, Class B
3.898% 2/15/48		2,800,000		2,813,386
JPMDB Commercial Mortgage Securities Trust, Series 2017-C7, Class C,
4.324% VRN 10/15/50 (d)		2,900,000		2,658,853
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800%
1.985% FRN 5/15/36 (a)		1,730,000		1,663,064
MFT Trust
Series 2020-ABC, Class A, 3.358% 2/06/30 (a)		1,185,000		1,216,616
Series 2020-ABC, Class B, 3.477% VRN 2/06/30 (a) (d)		1,278,000		1,288,129
MKT Mortgage Trust
Series 2020-525M, Class D, 2.941% VRN 2/12/40 (a) (d)		595,000		566,006
Series 2020-525M, Class E, 2.941% VRN 2/12/40 (a) (d)		1,220,000		1,105,080
Morgan Stanley Capital I Trust
Series 2019-L2, Class AS, 4.272% 3/15/52		2,450,000		2,812,760
Series 2018-H3, Class B, 4.620% VRN 7/15/51 (d)		740,000		826,890
Series 2011-C2, Class B, 5.200% VRN 6/15/44 (a) (d)		825,000		830,465
Wells Fargo Commercial Mortgage Trust
Series 2019-C49, Class AS, 4.244% 3/15/52		1,492,000		1,710,899
Series 2018-C45, Class AS, 4.405% VRN 6/15/51 (d)		1,400,000		1,602,394
Series 2018-C45, Class B, 4.556% 6/15/51		390,000		409,354
				79,913,421
Other ABS — 14.8%
321 Henderson Receivables LLC, Series 2015-1A, Class A
3.260% 9/15/72 (a)		2,865,072		2,983,865
AASET Trust
Series 2020-1A, Class A, 3.351% 1/16/40 (a)		1,934,608		1,703,669
Series 2019-1, Class A, 3.844% 5/15/39 (a)		2,424,978		2,190,989
Series 2018-2A, Class A, 4.454% 11/18/38 (a)		1,756,479		1,566,313
Adams Outdoor Advertising LP, Series 2018-1, Class A
4.810% 11/15/48 (a)		2,330,619		2,369,251
Anchorage Capital CLO 9 Ltd., Series 2016-9A, Class CR, 3 mo. USD LIBOR + 2.850%
4.069% FRN 7/15/32 (a)		1,000,000		975,302
Apidos CLO XXV, Series 2016-25A, Class A2R, 3 mo. USD LIBOR + 1.700%
2.835% FRN 10/20/31 (a)		2,610,000		2,544,220
Arbys Funding LLC, Series 2015-1A, Class A2
4.969% 10/30/45 (a)		2,101,000		2,130,479
Assurant CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.250%
3.385% FRN 10/20/31 (a)		1,400,000		1,316,078
Atlas Senior Loan Fund VII Ltd., Series 2016-7A, Class A1R, 3 mo. USD LIBOR + 1.280%
1.649% FRN 11/27/31 (a)		2,384,880		2,311,819
Avery Point VII CLO Ltd., Series 2015-7A, Class DR, 3 mo. USD LIBOR + 3.600%
4.819% FRN 1/15/28 (a)		1,000,000		928,864
Ballyrock CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 4.100%
4.477% FRN 11/20/30 (a)		800,000		782,618
Benefit Street Partners CLO V-B Ltd., Series 2018-5BA, Class A1A, 3 mo. USD LIBOR + 1.090%
2.225% FRN 4/20/31 (a)		1,920,000		1,859,624
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class CR, 3 mo. USD LIBOR + 3.500%
4.719% FRN 1/15/29 (a)		700,000		646,337
Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class B, 3 mo. USD LIBOR + 1.950%
3.169% FRN 10/15/32 (a)		750,000		721,650
BlueMountain CLO XXV Ltd., Series 2019-25A, Class B, 3 mo. USD LIBOR + 1.800%
3.019% FRN 7/15/32 (a)		2,750,000		2,638,498
BRE Grand Islander Timeshare Issuer LLC, Series 2017-1A, Class A
2.940% 5/25/29 (a)		522,493		524,633
CAL Funding II Ltd., Series 2018-2A, Class A
4.340% 9/25/43 (a)		1,221,000		1,210,471
Canyon Capital CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 2.750%
3.969% FRN 10/15/32 (a)		400,000		388,185
Capital Automotive REIT
Series 2014-1A, Class A, 3.660% 10/15/44 (a)		1,043,918		1,030,326

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2017-1A, Class A2, 4.180% 4/15/47 (a)	$	903,396	$	906,325
Carlyle Global Market Strategies CLO Ltd.
Series 2018-4A, Class A2, 3 mo. USD LIBOR + 1.800% 2.935% FRN 1/20/31 (a)		1,080,000		1,025,936
Series 2015-3A, Class CR, 3 mo. USD LIBOR + 2.850% 3.737% FRN 7/28/28 (a)		310,000		281,260
CARS-DB4 LP
Series 2020-1A, Class A3, 3.250% 2/15/50 (a)		612,082		605,322
Series 2020-1A, Class A6, 3.810% 2/15/50 (a)		493,000		454,050
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (a)		2,929,056		2,562,155
Castlelake Aircraft Structured Trust, Series 2018-1, Class A
4.125% 6/15/43 (a)		3,081,388		2,861,184
CBAM Ltd., Series 2018-6A, Class B1R, 3 mo. USD LIBOR + 2.100%
3.319% FRN 1/15/31 (a)		1,200,000		1,169,225
CIFC Funding Ltd.
Series 2020-1A, Class A1, 3 mo. USD LIBOR + 1.700% 0.000% FRN 7/15/32 (a) (c)		800,000		800,000
Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180% 2.315% FRN 11/16/30 (a)		2,100,000		2,068,674
Clear Creek CLO Ltd., Series 2015-1A, Class AR, 3 mo. USD LIBOR + 1.200%
2.335% FRN 10/20/30 (a)		2,120,000		2,071,596
CLI Funding V LLC, Series 2014-1A, Class A
3.290% 6/18/29 (a)		804,086		804,052
CLI Funding VI LLC, Series 2017-1A, Class A
3.620% 5/18/42 (a)		2,035,463		2,032,738
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + 0.460%
0.645% FRN 9/25/34		8,766		7,772
Crestline Denali CLO XIV Ltd., Series 2016-1A, Class A1R, 3 mo. USD LIBOR + 1.280%
2.323% FRN 10/23/31 (a)		1,299,146		1,251,500
Cronos Containers Program Ltd., Series 2014-2A, Class A
3.270% 11/18/29 (a)		417,593		410,256
DB Master Finance LLC, Series 2019-1A, Class A23
4.352% 5/20/49 (a)		1,922,473		2,109,909
Diamond Resorts Owner Trust, Series 2016-1, Class A
3.080% 11/20/28 (a)		832,791		832,983
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49 (a)		1,383,050		1,449,242
Series 2018-1A, Class A2I, 4.116% 7/25/48 (a)		1,483,575		1,576,098
Series 2017-1A, Class A23, 4.118% 7/25/47 (a)		653,250		699,550
Series 2015-1A, Class A2II, 4.474% 10/25/45 (a)		3,609,375		3,669,910
Dryden 72 CLO Ltd., Series 2019-72A, Class B, 3 mo. USD LIBOR + 1.900%
2.292% FRN 5/15/32 (a)		1,700,000		1,658,231
Eaton Vance CLO Ltd., Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750%
2.969% FRN 10/15/30 (a)		1,700,000		1,647,987
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
2.585% FRN 4/20/31 (a)		3,500,000		3,469,133
Elmwood CLO III Ltd., Series 2019-3A, Class B, 3 mo. USD LIBOR + 1.950%
3.169% FRN 10/15/32 (a)		1,300,000		1,275,450
Elmwood CLO IV Ltd., Series 2020-1A, Class A, 3 mo. USD LIBOR + 1.240%
2.422% FRN 4/15/33 (a)		1,000,000		976,022
FCI Funding LLC, Series 2019-1A, Class A
3.630% 2/18/31 (a)		411,849		415,015
Flatiron CLO Ltd.
Series 2019-1A, Class B, 3 mo. USD LIBOR + 1.900% 2.286% FRN 11/16/32 (a)		1,300,000		1,248,350
Series 2019-1A, Class C, 3 mo. USD LIBOR + 2.700% 3.086% FRN 11/16/32 (a)		250,000		242,049
Global Container Assets Ltd., Series 2015-1A, Class A2
3.450% 2/05/30 (a)		745,436		742,274
Global SC Finance SRL, Series 2014-1A, Class A1
3.190% 7/17/29 (a)		204,167		202,962
Goldentree Loan Management US CLO Ltd., Series 2019-5A, Class C, 3 mo. USD LIBOR + 2.700%
3.835% FRN 10/20/32 (a)		500,000		495,739
Goodgreen Trust
Series 2019-2A, Class A, 2.760% 10/15/54 (a)		3,892,711		3,857,003
Series 2016-1A, Class A, 3.230% 10/15/52 (a)		1,629,071		1,659,633
Series 2017-1A, Class A, 3.740% 10/15/52 (a)		774,347		809,182
Series 2019-1A, Class A, 3.860% 10/15/54 (a)		1,647,487		1,724,970
Series 2018-1A, Class A, 3.930% VRN 10/15/53 (a) (d)		2,022,549		2,103,742
Helios Issuer LLC, Series 2017-1A, Class A
4.940% 9/20/49 (a)		1,462,820		1,432,185
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (a)		936,125		955,260
Series 2017-3A, Class A1, 3.190% 9/20/48 (a)		934,324		955,886
Series 2017-2A, Class A1, 3.280% 9/20/48 (a)		282,928		292,222
Series 2016-4A, Class A1, 3.570% 9/20/47 (a)		927,736		971,396
Series 2017-2A, Class A2, 4.070% 9/20/48 (a)		227,536		239,621
Series 2018-1A, Class A2, 4.670% 9/20/48 (a)		1,649,972		1,765,063
Highbridge Loan Management Ltd.
Series 12A-18, Class B, 3 mo. USD LIBOR + 1.850% 2.985% FRN 7/18/31 (a)		1,700,000		1,618,993
Series 13A-18, Class C, 3 mo. USD LIBOR + 2.150% 3.369% FRN 10/15/30 (a)		1,000,000		944,180
Horizon Aircraft Finance I Ltd.
Series 2019-1, Class A, 3.721% 7/15/39 (a)		1,544,277		1,358,381
Series 2018-1, Class A, 4.458% 12/15/38 (a)		1,119,159		1,009,727
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A
3.425% 11/15/39 (a)		2,971,839		2,569,597
ICG US CLO Ltd., Series 2019-1A, Class A1A, 3 mo. USD LIBOR + 1.380%
2.371% FRN 10/26/32 (a)		900,000		882,959
J.G. Wentworth LLC, Series 2018-2A, Class A
3.960% 10/15/75 (a)		1,587,490		1,629,880
J.G. Wentworth XXXV LLC, Series 2015-2A, Class A
3.870% 3/15/58 (a)		652,466		611,288
KKR Financial CLO Ltd.
Series 24, Class A1, 3 mo. USD LIBOR + 1.360% 2.495% FRN 4/20/32 (a)		1,800,000		1,783,107
Series 25, Class B1, 3 mo. USD LIBOR + 2.000% 3.219% FRN 4/15/32 (a)		1,500,000		1,465,441
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (a)		2,142,041		1,783,182
Lunar Aircraft Ltd., Series 2020-1A, Class A
3.376% 2/15/45 (a)		2,248,400		2,052,566

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
MACH 1 Cayman Ltd., Series 2019-1, Class A
3.474% 10/15/39 (a)	$	2,629,521	$	2,171,827
Madison Park Funding Ltd.
Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600% 2.819% FRN 7/15/30 (a)		2,090,000		2,005,127
Series 2018-29A, Class C, 3 mo. USD LIBOR + 2.200% 3.335% FRN 10/18/30 (a)		680,000		653,142
Magnetite XV Ltd., Series 2015-15A, Class CR, 3 mo. USD LIBOR + 1.800%
2.791% FRN 7/25/31 (a)		2,830,000		2,690,351
Mariner Finance Issuance Trust, Series 2018-AA, Class A
4.200% 11/20/30 (a)		2,235,000		2,208,796
Mosaic Solar Loans LLC
Series 2017-2A, Class A, 3.820% 6/22/43 (a)		635,544		654,072
Series 2018-1A, Class A, 4.010% 6/22/43 (a)		278,117		281,007
Series 2017-1A, Class A, 4.450% 6/20/42 (a)		302,842		308,957
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
2.385% FRN 10/20/30 (a)		1,850,000		1,786,327
MVW Owner Trust, Series 2017-1A, Class A
2.420% 12/20/34 (a)		221,232		218,323
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (a)		2,190,000		2,244,081
Octagon Investment Partners 39 Ltd., Series 2018-3A, Class C, 3 mo. USD LIBOR + 2.200%
3.335% FRN 10/20/30 (a)		1,180,000		1,133,298
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 2.428% FRN 10/22/32 (a)		1,250,000		1,226,881
Series 2019-4A, Class C, 3 mo. USD LIBOR + 2.650% 3.748% FRN 10/22/32 (a)		1,000,000		983,511
OneMain Financial Issuance Trust, Series 2019-2A, Class A
3.140% 10/14/36 (a)		10,200,000		10,227,118
Oxford Finance Funding Trust
Series 2020-1A, Class A2, 3.101% 2/15/28 (a)		1,894,000		1,916,967
Series 2016-1A, Class A, 3.968% 6/17/24 (a)		278,423		279,669
Pioneer Aircraft Finance Ltd., Series 2019-1, Class A
3.967% 6/15/44 (a)		1,809,948		1,556,019
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (a)		2,970,075		2,493,823
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.035% FRN 2/25/23 (a)		1,180,000		1,156,486
Regatta XIV Funding Ltd., Series 2018-3A, Class B, 3 mo. USD LIBOR + 1.850%
2.841% FRN 10/25/31 (a)		1,030,000		995,038
Sierra Receivables Funding LLC
Series 2015-3A, Class B, 3.080% 9/20/32 (a)		93,892		93,329
Series 2018-2A, Class C, 3.940% 6/20/35 (a)		660,492		624,976
Series 2019-1A, Class D, 4.750% 1/20/36 (a)		1,892,516		1,764,138
Series 2018-3A, Class D, 5.200% 9/20/35 (a)		1,083,851		1,043,430
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
2.686% FRN 8/18/31 (a)		1,660,000		1,551,977
Store Master Funding I-VII
Series 2019-1, Class A2, 3.650% 11/20/49 (a)		3,622,972		3,418,294
Series 2018-1A, Class A2, 4.290% 10/20/48 (a)		1,467,658		1,463,030
Structured Asset Securities Corp. Mortgage Loan Trust, Series 2006-GEL1, Class M2, 1 mo. USD LIBOR + .800%
0.985% FRN 11/25/35 (a)		1,449,456		1,378,166
Structured Receivables Finance LLC, Series 2010-B, Class A
3.730% 8/15/36 (a)		221,752		225,710
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (a)		632,539		629,098
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (a)		1,865,539		2,021,811
Taco Bell Funding LLC
Series 2018-1A, Class A2II, 4.940% 11/25/48 (a)		1,418,400		1,488,882
Series 2016-1A, Class A23, 4.970% 5/25/46 (a)		1,940,000		2,016,187
TAL Advantage VI LLC, Series 2017-1A, Class A
4.500% 4/20/42 (a)		1,714,980		1,710,826
Textainer Marine Containers VII Ltd., Series 2019-1A, Class A
3.960% 4/20/44 (a)		489,600		497,666
THL Credit Wind River CLO Ltd., Series 2018-3A, Class B, 3 mo. USD LIBOR + 1.700%
2.835% FRN 1/20/31 (a)		2,440,000		2,325,420
TICP CLO XIV Ltd., Series 2019-14A, Class A2, 3 mo. USD LIBOR + 1.900%
3.035% FRN 10/20/32 (a)		250,000		243,797
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49 (a)		4,127,000		4,005,592
Series 2019-1A, Class A, 3.820% 4/17/49 (a)		4,366,445		4,452,291
Series 2018-1A, Class A2, 4.620% 6/17/48 (a)		2,370,000		2,411,525
Trip Rail Master Funding LLC, Series 2017-1A, Class A1
2.709% 8/15/47 (a)		219,670		219,773
Triton Container Finance LLC
Series 2017-1A, Class A, 3.520% 6/20/42 (a)		660,251		650,635
Series 2017-2A, Class A, 3.620% 8/20/42 (a)		2,488,718		2,514,758
Vivint Solar Financing V LLC, Series 2018-1A, Class B
7.370% 4/30/48 (a)		2,546,243		2,182,021
Voya CLO Ltd.
Series 2015-3A, Class A3R, 3 mo. USD LIBOR + 1.700% 2.835% FRN 10/20/31 (a)		1,500,000		1,426,392
Series 2019-3A, Class B1, 3 mo. USD LIBOR + 1.850% 2.985% FRN 10/17/32 (a)		1,500,000		1,452,794
WAVE LLC
Series 2019-1A, Class A, 3.597% 9/15/44 (a)		4,893,513		4,466,100
Series 2017-1A, Class C, 6.656% 11/15/42 (a)		1,718,600		635,586
WAVE Trust, Series 2017-1A, Class A
3.844% 11/15/42 (a)		3,083,481		2,686,265
Wendy's Funding LLC, Series 2015-1A, Class A23
4.497% 6/15/45 (a)		3,048,000		3,057,209
Westgate Resorts LLC, Series 2017-1A, Class A
3.050% 12/20/30 (a)		522,794		520,984
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (a)		1,200,937		906,611
				198,597,697
Student Loans ABS — 10.1%
College Avenue Student Loans LLC
Series 2019-A, Class B, 3.810% 12/28/48 (a)		2,630,000		2,540,553
Series 2019-A, Class C, 4.460% 12/28/48 (a)		1,505,000		1,441,324
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS
FRN 1/25/47		875,000		691,187
ECMC Group Student Loan Trust

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2018-2A, Class A, 1 mo. USD LIBOR + 0.800% 0.985% FRN 9/25/68 (a)	$	4,748,377	$	4,523,688
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.385% FRN 12/27/66 (a)		2,047,146		2,006,350
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 1.518% FRN 7/26/66 (a)		2,892,547		2,805,199
EdLinc Student Loan Funding, Series 2017-A, Class A, PRIME - 1.150
3.600% FRN 12/01/47 (a)		1,946,337		1,920,879
Education Loan Asset-Backed Trust I
Series 2003-1, Class A2, 28 day ARS 0.000% FRN 2/01/43 (a)		1,300,000		1,199,354
Series 2003-2, Class 2A1, 28 day ARS 0.000% FRN 8/01/43 (a)		1,950,000		1,800,809
Series 2013-1, Class B1, 1 mo. USD LIBOR + 1.000% 1.185% FRN 11/25/33 (a)		1,139,834		1,047,097
Higher Education Funding I
Series 2004-1, Class B2, 28 day ARS 0.000% FRN 1/01/44 (a)		600,000		523,611
Series 2004-1, Class B1, 28 day ARS 0.000% FRN 1/01/44 (a)		600,000		531,440
Laurel Road Prime Student Loan Trust
Series 2017-B, Class BFX, 3.020% 8/25/42 (a)		538,731		530,429
Series 2018-B, Class BFX, 3.720% 5/26/43 (a)		436,918		433,671
Navient Private Education Loan Trust, Series 2018-BA, Class A2B, 1 mo. USD LIBOR + .720%
0.905% FRN 12/15/59 (a)		848,845		810,553
Navient Private Education Refi Loan Trust
Series 2019-CA, Class B, 3.670% 2/15/68 (a)		1,512,000		1,558,653
Series 2019-A, Class B, 3.900% 1/15/43 (a)		1,500,000		1,535,004
Series 2018-CA, Class B, 4.220% 6/16/42 (a)		1,480,000		1,489,191
Navient Student Loan Trust
Series 2016-1A, Class A, 1 mo. USD LIBOR + .700% 0.885% FRN 2/25/70 (a)		2,705,350		2,563,322
Series 2018-2A, Class A3, 1 mo. USD LIBOR + 0.750% 0.935% FRN 3/25/67 (a)		3,320,000		3,105,301
Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.800% 0.985% FRN 3/25/67 (a)		4,650,000		4,590,179
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.085% FRN 12/27/67 (a)		3,100,000		3,091,227
Series 2019-2A, Class A2, 1 mo. USD LIBOR + 1.000% 1.185% FRN 2/27/68 (a)		1,548,000		1,457,876
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 3/25/66 (a)		3,241,986		3,164,589
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 6/25/65 (a)		2,385,041		2,336,307
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 1.485% FRN 3/25/66 (a)		6,800,000		6,310,864
Series 2014-8, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/26/49		2,500,000		2,058,560
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 10/25/58		1,200,000		981,818
Series 2019-BA, Class B, 4.040% 12/15/59 (a)		3,700,000		3,849,863
Series 2018-EA, Class B, 4.440% 12/15/59 (a)		730,000		738,534
Nelnet Private Education Loan Trust, Series 2016-A, Class A1B
3.600% 12/26/40 (a)		398,772		400,523
Nelnet Student Loan Trust
Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.750% 0.935% FRN 9/27/66 (a)		4,500,000		4,382,996
Series 2014-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 10/25/50 (a)		975,000		902,516
Series 2014-5A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 5/26/54 (a)		1,300,000		1,235,836
Series 2015-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 5/26/54 (a)		1,130,000		1,066,414
Series 2015-3A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 6/25/54 (a)		1,100,000		1,025,228
Series 2019-4A, Class B, 1 mo. USD LIBOR + 1.650% 1.835% FRN 9/26/67 (a)		3,800,000		3,613,958
Series 2019-5, Class A, 2.530% 10/25/67 (a)		9,922,201		9,918,847
Series 2019-5, Class B, 3.450% 10/25/67 (a)		2,850,000		2,692,084
SLC Student Loan Trust
Series 2007-1, Class A5, 3 mo. USD LIBOR + .090% 0.482% FRN 2/15/68		8,400,000		7,120,786
Series 2005-1, Class B, 3 mo. USD LIBOR + .200% 0.592% FRN 2/15/45		1,578,660		1,392,823
SLM Student Loan Trust
Series 2002-7, Class B, 28 day ARS 0.000% FRN 12/15/39		3,800,000		3,532,744
Series 2006-2, Class R, 0.000% 1/25/41		9,078		4,639,345
Series 2006-5, Class B, 3 mo. USD LIBOR + 0.210% 1.201% FRN 10/25/40		1,847,598		1,652,633
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 1.301% FRN 1/25/55		1,355,637		1,205,677
Series 2003-14, Class A7, 3 mo. USD LIBOR + .600% 1.591% FRN 10/25/65 (a)		9,670,000		9,111,531
SMB Private Education Loan Trust, Series 2017-A, Class B
3.500% 6/17/41 (a)		1,800,000		1,790,255
SoFi Alternative Trust, Series 2019-C, Class PT,
4.853% VRN 1/25/45 (a) (d)		6,954,241		7,552,730
SoFi Professional Loan Program LLC
Series 2017-D, Class R1, 0.000% 9/25/40 (a)		4,647,800		1,613,065
Series 2018-A, Class R1, 0.000% 2/25/42 (a)		3,470,600		1,673,922
Series 2018-B, Class R1, 0.000% 8/26/47 (a)		3,139,900		1,238,063
Series 2018-D, Class R1, 0.000% 2/25/48 (a)		5,678,800		1,383,924
Series 2019-A, Class R1, 0.000% 6/15/48 (a)		8,126,500		1,995,056
South Carolina Student Loan Corp., Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500%
1.673% FRN 8/01/35		3,025,000		2,900,302
				135,678,690
WL Collateral CMO — 0.8%
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
4.493% VRN 8/25/34 (d)		86,459		83,993
Citigroup Mortgage Loan Trust, Series 2019-IMC1, Class M1,
3.170% VRN 7/25/49 (a) (d)		1,188,500		1,082,814
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.668% VRN 2/25/34 (d)		66,472		63,774
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (d)		17,481		16,534
Deephaven Residential Mortgage Trust
Series 2018-1A, Class A3, 3.202% VRN 12/25/57 (a) (d)		303,512		300,966
Series 2019-1A, Class A3, 3.948% VRN 1/25/59 (a) (d)		844,218		844,800
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
3.487% VRN 8/25/34 (d)		24,761		24,829
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.687% VRN 8/25/34 (d)		141,276		138,456
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47 (a) (d)		2,210,221		2,253,656
Merrill Lynch Mortgage Investors, Inc.
Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (d)		9,265		9,081
Series 2003-A4, Class IA, 4.234% VRN 7/25/33 (d)		6,063		5,751

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
PSMC Trust, Series 2018-2, Class A1, 3.500% VRN 6/25/48 (a) (d)	$	2,148,280	$	2,187,440
Sequoia Mortgage Trust Series 2018-CH2, Class A3, 4.000% VRN 6/25/48 (a) (d)		1,798,010		1,847,877
Series 2018-CH4, Class A2, 4.000% VRN 10/25/48 (a) (d)		788,324		802,123
Series 2019-1, Class A1, 4.000% VRN 2/25/49 (a) (d)		248,958		253,788
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A, 3.673% VRN 3/25/34  (d)		90,710		89,108
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400% 2.904% FRN 4/25/44		212,826		202,650
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1, 4.000% VRN 11/25/48 (a) (d)		1,018,107		1,039,801
				11,247,441
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $455,954,872)				440,010,634
Sovereign Debt Obligations — 0.7%
Colombia Government International Bond 6.125%  1/18/41		2,980,000		3,720,530
Mexico Government International Bond 4.750% 3/08/44		4,328,000		4,587,680
6.750% 9/27/34		950,000		1,248,072
				9,556,282
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $8,551,708)				9,556,282
U.S. Government Agency Obligations and Instrumentalities — 24.8%
Collateralized Mortgage Obligations — 0.3%
Federal Home Loan Mortgage Corp. Series 2617, Class Z, 5.500% 5/15/33		1,018,803		1,180,407
Series 2693, Class Z, 5.500% 10/15/33		1,833,751		2,067,694
Series 2178, Class PB, 7.000% 8/15/29		139,073		158,177
				3,406,278
Pass-Through Securities — 23.9%
Federal Home Loan Mortgage Corp. Pool #QA8791 3.500% 4/01/50		1,652,115		1,772,619
Pool #RA2483 3.500% 6/01/50		14,235,353		15,135,760
Pool #Z40047 4.000% 10/01/41		192,739		211,043
Pool #C00836 7.000% 7/01/29		6,534		7,501
Pool #C49314 7.000% 4/01/31		4,232		4,980
Pool #C51422 7.000% 5/01/31		1,605		1,891
Pool #C53034 7.000% 6/01/31		10,992		12,811
Pool #G01311 7.000% 9/01/31		33,683		39,214
Pool #G01317 7.000% 10/01/31		19,207		22,363
Pool #G00143 7.500% 6/01/23		142		150
Pool #C55867 7.500% 2/01/30		13,703		15,438
Pool #C41497 7.500% 9/01/30		63		74
Pool #C44830 7.500% 11/01/30		20		23
Pool #C45235 7.500% 12/01/30		13,360		15,535
Pool #C46038 7.500% 12/01/30		527		613
Pool #C01116 7.500% 1/01/31		687		811
Pool #C46309 7.500% 1/01/31		425		499
Pool #C46810 7.500% 1/01/31		108		128
Pool #C47063 7.500% 1/01/31		2,324		2,720
Pool #C47060 7.500% 1/01/31		582		686
Pool #G00653 8.500% 11/01/25		9,416		10,334
Federal National Mortgage Association Pool #MA3984 2.500% 4/01/35		13,896,403		14,552,959
Pool #MA4013 2.500% 5/01/35		19,722,248		20,654,055
Pool #775539 12 mo. USD LIBOR + 1.636% 2.931% FRN 5/01/34		96,853		101,065
Pool #MA3029 3.000% 6/01/32		4,073,307		4,291,968
Pool #MA3090 3.000% 8/01/32		1,744,678		1,837,244
Pool #AS1304 3.500% 12/01/28		1,144,387		1,220,294
Pool #AV1897 3.500% 12/01/28		221,347		236,029
Pool #AV2325 3.500% 12/01/28		587,796		626,785
Pool #BF0196 3.500% 2/01/41		1,350,643		1,460,659
Pool #MA1356 3.500% 2/01/43		7,885,017		8,522,360
Pool #FM1970 3.500% 11/01/49		2,761,937		2,985,184
Pool #CA5308 3.500% 3/01/50		9,637,015		10,327,883
Pool #CA6096 3.500% 6/01/50		12,933,445		13,767,671
Pool #725692 1 year CMT + 2.137% 3.957% FRN 10/01/33		127,363		134,091
Pool #888586 1 year CMT + 2.195% 3.973% FRN 10/01/34		300,770		316,659
Pool #BJ0686 4.000% 4/01/48		3,919,561		4,166,809
Pool #CA1951 4.000% 7/01/48		2,627,136		2,791,215
Pool #CA2039 4.000% 7/01/48		2,922,712		3,102,739
Pool #CA1909 4.500% 6/01/48		7,285,125		7,828,649
Pool #AD6437 5.000% 6/01/40		440,758		503,322
Pool #AD6996 5.000% 7/01/40		2,807,947		3,206,521
Pool #AL8173 5.000% 2/01/44		1,124,229		1,275,727
Pool #254379 7.000% 7/01/32		23,442		27,548
Pool #252717 7.500% 9/01/29		1,213		1,410
Pool #535996 7.500% 6/01/31		4,443		5,220
Pool #254009 7.500% 10/01/31		12,653		14,767
Pool #323992 8.000% 11/01/29		964		1,109
Pool #525725 8.000% 2/01/30		2,845		3,336
Pool #253266 8.000% 5/01/30		3,018		3,525
Pool #537433 8.000% 5/01/30		1,157		1,363
Pool #253347 8.000% 6/01/30		2,988		3,489
Pool #544976 8.000% 7/01/30		346		401
Pool #535428 8.000% 8/01/30		3,159		3,686
Pool #543290 8.000% 9/01/30		48		57
Pool #547786 8.000% 9/01/30		1,255		1,464
Pool #550767 8.000% 9/01/30		1,736		2,046
Pool #553061 8.000% 9/01/30		1,511		1,701
Pool #253481 8.000% 10/01/30		2,837		3,322
Pool #535533 8.000% 10/01/30		2,964		3,467
Pool #253644 8.000% 2/01/31		1,303		1,528
Pool #581170 8.000% 5/01/31		1,129		1,296
Pool #593848 8.000% 7/01/31		801		945
Pool #190317 8.000% 8/01/31		18,174		21,223
Pool #545240 8.000% 9/01/31		1,714		2,005
Pool #541202 8.500% 8/01/26		3,737		3,935
Government National Mortgage Association I Pool #404246 6.500% 8/15/28		173		195
Pool #781038 6.500% 5/15/29		37,806		42,582
Pool #781468 6.500% 7/15/32		2,603		3,003
Pool #781496 6.500% 9/15/32		12,760		14,642

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Pool #363066 7.000% 8/15/23	$	1,377	$	1,454
Pool #352049 7.000% 10/15/23		851		904
Pool #354674 7.000% 10/15/23		1,097		1,161
Pool #345964 7.000% 11/15/23		539		574
Pool #380866 7.000% 3/15/24		445		476
Pool #781124 7.000% 12/15/29		4,792		5,471
Pool #781319 7.000% 7/15/31		88,610		102,724
Pool #565982 7.000% 7/15/32		12,942		15,175
Pool #581417 7.000% 7/15/32		27,314		31,572
Pool #357262 7.500% 9/15/23		657		700
Pool #441009 8.000% 11/15/26		647		729
Pool #522777 8.000% 12/15/29		4,408		5,060
Pool #523043 8.000% 3/15/30		236		272
Pool #529134 8.000% 3/15/30		1,464		1,717
Pool #528714 8.000% 4/15/30		1,551		1,822
Pool #477036 8.000% 4/15/30		587		689
Pool #503157 8.000% 4/15/30		12,655		14,855
Pool #544640 8.000% 11/15/30		9,828		11,520
Pool #531298 8.500% 8/15/30		861		996
Government National Mortgage Association II Pool# MA6656 3.000% 5/20/50		13,446,846		14,243,593
Pool# MA6710 3.000% 6/20/50		13,500,000		14,304,115
Government National Mortgage Association II TBA Pool #24 3.000% 12/01/49  (c)		3,100,000		3,283,941
Pool #471 3.500% 6/01/49  (c)		99,055,000		104,526,244
Uniform Mortgage Backed Securities TBA
Pool #1127 3.500% 4/01/49  (c)		55,675,000		58,554,444
Pool #6447 4.000% 8/01/48  (c)		4,900,000		5,192,851
				321,637,405
Whole Loans — 0.6%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes Series 2016-HQA3, Class M2, 1 mo. USD LIBOR + 1.350% 1.535% FRN 3/25/29		158,198		157,514
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.671% FRN 6/25/50 (a) (c)		3,590,000		3,590,000
Series 2020-DNA3, Class M2, 3.171% 6/25/50 (a) (c)		4,680,000		4,680,000
				8,427,514
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $331,915,080)				333,471,197
U.S. Treasury Obligations — 1.6%
U.S. Treasury Bonds & Notes — 1.6%
U.S. Treasury Bond 2.250% 8/15/49  (e)		7,800,000		9,379,520
3.500% 2/15/39 (e)		3,400,000		4,809,606
U.S. Treasury Note 0.375% 4/30/25		7,800,000		7,834,103
				22,023,229
TOTAL U.S. TREASURY OBLIGATIONS (Cost $22,055,692)				22,023,229
TOTAL BONDS & NOTES (Cost $1,331,079,583)				1,343,449,979
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $3,506,056)				2,517,132
TOTAL LONG-TERM INVESTMENTS (Cost $1,337,835,639)				1,349,278,211
Short-Term Investments — 13.5%
Commercial Paper — 13.5%
Abb Treasury Centre 1.322% 7/29/20 (a)		5,000,000		4,996,391
American Honda Finance Corp. 0.793% 10/21/20		5,000,000		4,989,987
1.425% 9/04/20		5,000,000		4,994,867
Aon Corp. 2.708% 7/28/20 (a)		2,600,000		2,599,367
AstraZeneca PLC 2.053% 12/11/20 (a)		5,000,000		4,986,698
2.113% 11/10/20 (a)		5,000,000		4,989,988
2.155% 11/10/20 (a)		5,000,000		4,989,988
Bayer Corp. 0.966% 9/01/20 (a)		5,000,000		4,995,756
2.551% 7/15/20 (a)		5,000,000		4,999,437
2.592% 9/15/20 (a)		5,000,000		4,994,567
Boeing Co. 2.109% 11/10/20 (a)		4,000,000		3,971,597
2.109% 11/12/20 (a)		5,000,000		4,963,906
2.560% 7/31/20 (a)		4,000,000		3,993,900
British Aerospace Public Ltd. Co. 1.842% 9/08/20 (a)		3,000,000		2,997,101
Daimler Finance North America LLC 1.606% 7/13/20 (a)		5,000,000		4,999,512
1.682% 9/24/20 (a)		5,000,000		4,993,753
1.734% 9/29/20 (a)		1,000,000		998,645
1.785% 9/24/20 (a)		4,000,000		3,995,002
Dupont De Nemours, Inc. 0.518% 8/13/20 (a)		3,000,000		2,998,684
1.484% 7/15/20 (a)		5,000,000		4,998,604
2.570% 7/15/20 (a)		7,000,000		6,998,046
Ei Dupont 0.835% 12/02/20 (a)		5,000,000		4,982,412
0.866% 12/09/20 (a)		5,000,000		4,981,100
1.586% 12/09/20 (a)		5,000,000		4,981,100
Enbridge (US), Inc. 0.599% 10/01/20 (a)		5,000,000		4,992,935
0.813% 9/14/20 (a)		5,000,000		4,994,648

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Entergy Corp.
0.660%9/15/20(a)	$	5,600,000	$	5,592,646
FMC Technologies, Inc. 1.933%, 8/04/20 (a)		6,000,000		5,997,976
2.237%, 7/15/20 (a)		1,000,000		999,888
Marriott International, Inc. 1.581%, 7/20/20 (a)		5,000,000		4,993,369
1.842%, 9/02/20 (a)		2,000,000		1,990,756
1.844%, 9/28/20 (a)		10,000,000		9,931,750
Nutrien Ltd. 1.321%, 7/09/20 (a)		4,000,000		3,999,680
1.904% 9/16/20 (a)		5,000,000		4,994,475
Suncor Energy, Inc. 1.241%, 8/26/20 (a)		5,000,000		4,996,327
1.578%, 8/11/20 (a)		5,000,000		4,997,760
1.752%, 8/04/20 (a)		5,000,000		4,998,313
Xylem, Inc. 2.102% 11/18/20 (a)		10,000,000		9,969,842
				181,840,773
TOTAL SHORT-TERM INVESTMENTS (Cost $181,573,912)				181,840,773
TOTAL INVESTMENTS — 113.7% (Cost $1,519,409,551) (f)				1,531,118,984
Other Assets/(Liabilities) — (13.7)%				(184,645,275	)
NET ASSETS — 100.0%			$	1,346,473,709

Abbreviation Legend
ABS	Asset-Backed Security
ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
DAC	Designated Activity Company
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
SOFR	Secured Overnight Financing Rate
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note
WL	Whole Loan

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets.
(a)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $663,540,799 or 49.28% of net assets.
(b)	Security is perpetual and has no stated maturity date.
(c)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(d)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at June 30, 2020.
(e)	A portion of this security is pledged/held as collateral for open derivatives. (Note 2).
(f)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Core Bond Fund — Portfolio of Investments (Continued)

(#) Interest Rate Swaptions Purchased  

			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10 -Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	5,551,000	$	850,968	$	277,507	$	573,461
Put
10 -Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	64,580,000	$	1,666,164	$	3,228,549	$	(1,562,385	)
									$	2,517,132	$	3,506,056	$	(988,924	)

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Ultra 10 Year	9/21/20	25	$	3,937,580		$	(471	)
U.S. Treasury Ultra Bond	9/21/20	513		111,932,069			(17,913	)
U.S. Treasury Note 2 Year	9/30/20	1,026		226,552,906			16,751
U.S. Treasury Note 5 Year	9/30/20	338		42,409,193			91,667
						$	90,034
Short
90 Day Eurodollar	9/14/20	13	$	(3,169,357	)	$	(72,031	)
U.S. Treasury Long Bond	9/21/20	168		(29,751,624	)		(246,876	)
90 Day Eurodollar	12/14/20	12		(2,925,410	)		(65,890	)
90 Day Eurodollar	3/15/21	12		(2,926,460	)		(67,540	)
90 Day Eurodollar	9/13/21	21		(5,122,093	)		(118,720	)
90 Day Eurodollar	3/14/22	19		(4,632,849	)		(108,601	)
90 Day Eurodollar	9/19/22	17		(4,143,481	)		(97,169	)
90 Day Eurodollar	3/13/23	14		(3,410,179	)		(80,021	)
90 Day Eurodollar	12/18/23	19		(4,623,825	)		(106,463	)
90 Day Eurodollar	12/16/24	50		(12,152,959	)		(270,791	)
						$	(1,234,102	)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG.34†	1.000%	Quarterly	6/20/25	USD	5,400,000	$	(63,115	)	$	19,177	$	(82,292	)
CDX.NA.IG.34†	1.000%	Quarterly	6/20/25	USD	6,200,000		(73,780	)		26,962		(100,742	)
						$	(136,895	)	$	46,139	$	(183,034	)

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

Currency Legend 

USD  U.S. Dollar

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 0.1%
Common Stock — 0.0%
Basic Materials — 0.0%
Forest Products & Paper — 0.0%
The Newark Group, Inc. (a) (b)		26,904	$	807
Energy — 0.0%
Oil & Gas — 0.0%
Jupiter Resources, Inc. (b)		18,661		13,995
TOTAL COMMON STOCK (Cost $92,228)				14,802
Preferred Stock — 0.1%
Financial — 0.1%
Insurance — 0.1%
The Allstate Corp., 3 mo. USD LIBOR + 3.165% 5.100% VRN		10,000		254,700
TOTAL PREFERRED STOCK (Cost $250,000)				254,700
TOTAL EQUITIES (Cost $342,228)				269,502

	Principal Amount
Bonds & Notes — 96.8%
Corporate Debt — 45.0%
Aerospace & Defense — 0.4%
TransDigm, Inc. 5.500% 11/15/27	$	250,000	218,175
6.250% 3/15/26 (c)		500,000	498,760
6.375% 6/15/26		225,000	204,971
			921,906
Agriculture — 0.9%
BAT Capital Corp. 4.700% 4/02/27		200,000	228,588
4.758% 9/06/49		165,000	183,216
Bunge Ltd. Finance Corp. 3.250% 8/15/26		220,000	227,507
4.350% 3/15/24		360,000	393,395
Imperial Brands Finance PLC 3.500% 7/26/26  (c)		300,000	320,323
3.875% 7/26/29 (c)		320,000	336,921
Imperial Tobacco Finance PLC 4.250% 7/21/25  (c)		300,000	330,179
Reynolds American, Inc. 5.850% 8/15/45		150,000	184,373
			2,204,502
Airlines — 0.0%
American Airlines Pass-Through Trust, Series 2014-1, Class B, 4.375% 4/01/24		12,739	9,159
United Airlines Pass-Through Trust, Series 2018-1, Class B, 4.600% 9/01/27		87,115	65,266
			74,425
Auto Manufacturers — 1.6%
Ford Motor Co. 7.450% 7/16/31		270,000	284,175
Ford Motor Credit Co. LLC 3.087% 1/09/23		310,000	295,275
3.336% 3/18/21		825,000	816,511
4.140% 2/15/23		285,000	278,858
4.375% 8/06/23		550,000	540,309
5.085% 1/07/21		200,000	199,810
General Motors Co. 4.200% 10/01/27		215,000	219,075
5.150% 4/01/38		230,000	220,449
5.200% 4/01/45		225,000	217,930

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
General Motors Financial Co., Inc. 3.500% 11/07/24	$	315,000	$	319,211
4.150% 6/19/23		255,000		266,534
4.200% 11/06/21		245,000		251,253
				3,909,390
Banks — 5.9%
Associated Banc-Corp. 4.250% 1/15/25		413,000		433,106
Banco General SA 4.125% 8/07/27  (c)		260,000		275,928
Bank of America Corp.  SOFR + 2.150% 2.592% VRN 4/29/31		300,000		317,444
4.183% 11/25/27		200,000		228,892
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		210,000		255,185
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		200,000		235,893
6.110% 1/29/37		190,000		267,506
7.750% 5/14/38		125,000		204,352
The Bank of Nova Scotia 4.500%  12/16/25		300,000		340,862
3 mo. USD LIBOR + 2.648% 4.650% VRN   (d)		550,000		518,711
Barclays Bank PLC 10.179% 6/12/21  (c)		800,000		865,116
Barclays PLC 3 mo. USD LIBOR + 1.380% 1.766% FRN 5/16/24		365,000		361,662
4.375% 9/11/24		600,000		640,478
Citigroup, Inc. 4.600% 3/09/26		495,000		565,313
5.250% 3/07/25		500,000		518,020
5.875% 1/30/42		100,000		145,438
6.000% 10/31/33		85,000		112,147
Credit Suisse AG 6.500% 8/08/23  (c)		575,000		626,899
Danske Bank A/S 3 mo. USD LIBOR + 1.249% 3.001% VRN 9/20/22  (c)		370,000		375,753
Deutsche Bank AG 3.150% 1/22/21		395,000		396,852
First Republic Bank 4.375% 8/01/46		810,000		940,736
Fulton Financial Corp.   3.600% 3/16/22		240,000		245,196
The Goldman Sachs Group, Inc. 5.150% 5/22/45		290,000		381,788
5.950% 1/15/27		370,000		458,385
6.250% 2/01/41		35,000		52,476
6.750% 10/01/37		165,000		240,217
HSBC Holdings PLC 4.250% 3/14/24		200,000		215,788
6.500% 9/15/37		125,000		170,267
Huntington Bancshares, Inc. 3 mo. USD LIBOR + 2.880% 5.700% VRN   (d)		510,000		432,225
JP Morgan Chase & Co. SOFR + 2.515% 2.956% VRN 5/13/31		235,000		249,237
4.950% 6/01/45		170,000		228,703
Morgan Stanley 4.350% 9/08/26		450,000		518,886
5.000% 11/24/25		175,000		204,385
NBK Tier 1 Financing 2 Ltd. 6 year USD Swap + 2.832% 4.500% VRN   (c) (d)		685,000		648,722
Nordea Bank Abp 5 year CMT + 4.110% 6.625% VRN   (c) (d)		405,000		432,297
SVB Financial Group 3.125% 6/05/30		115,000		123,299
The Toronto-Dominion Bank 5 year USD Swap + 2.205% 3.625% VRN 9/15/31		255,000		286,883
Truist Bank 2.250% 3/11/30		315,000		317,948
Valley National Bancorp 5.125% 9/27/23		110,000		117,618
Wells Fargo & Co. 5.606% 1/15/44		105,000		144,825
				14,095,438
Beverages — 0.7%
Anheuser-Busch InBev Worldwide, Inc. 4.600% 4/15/48		255,000		298,507
8.200% 1/15/39		250,000		394,240
Bacardi Ltd. 5.150% 5/15/38  (c)		200,000		234,638
Becle SAB de CV 3.750% 5/13/25  (c)		350,000		368,167
Molson Coors Beverage Co. 4.200% 7/15/46		191,000		185,868

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.000% 5/01/42	$	135,000	$	143,016
				1,624,436
Building Materials — 0.4%
Standard Industries, Inc. 4.750% 1/15/28  (c)		151,000		153,076
5.000% 2/15/27 (c)		490,000		496,125
Standard Industries, Inc. /NJ 4.375% 7/15/30  (c)		200,000		199,500
				848,701
Chemicals — 1.3%
CF Industries, Inc. 4.950% 6/01/43		200,000		215,560
5.375% 3/15/44		128,000		138,406
DuPont de Nemours, Inc. 5.319% 11/15/38		345,000		437,414
Methanex Corp. 5.250% 3/01/22		40,000		39,350
Syngenta Finance NV 3.933% 4/23/21  (c)		325,000		328,164
4.441% 4/24/23 (c)		425,000		446,060
4.892% 4/24/25 (c)		500,000		525,656
Yara International ASA 3.148% 6/04/30  (c)		85,000		87,869
4.750% 6/01/28 (c)		690,000		793,643
				3,012,122
Commercial Services — 0.5%
The ADT Security Corp. 6.250% 10/15/21		593,000		607,825
Cintas Corp. No 2 3.700% 4/01/27		290,000		329,361
ERAC USA Finance LLC 7.000% 10/15/37  (c)		50,000		64,052
PayPal Holdings, Inc. 3.250% 6/01/50		165,000		178,677
				1,179,915
Computers — 1.0%
Dell International LLC/EMC Corp. 6.020% 6/15/26  (c)		375,000		429,928
8.350% 7/15/46 (c)		275,000		366,792
Genpact Luxembourg Sarl 3.375% 12/01/24		660,000		681,080
3.700% STEP 4/01/22		435,000		446,651
Leidos, Inc. 4.375% 5/15/30  (c)		135,000		152,071
5.500% 7/01/33		226,000		254,035
				2,330,557
Diversified Financial Services — 3.6%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 4.500% 9/15/23  (e)		315,000		315,037
6.500% 7/15/25		285,000		298,824
Aircastle Ltd. 4.125% 5/01/24		200,000		187,889
4.400% 9/25/23		275,000		266,774
Ally Financial, Inc. 5.125% 9/30/24		317,000		342,324
8.000% 11/01/31		651,000		840,001
Antares Holdings LP 6.000% 8/15/23  (c)		790,000		757,761
8.500% 5/18/25 (c)		330,000		329,535
Ares Finance Co. LLC 4.000% 10/08/24  (c)		375,000		397,914
Avolon Holdings Funding Ltd. 4.375% 5/01/26  (c)		205,000		172,378
5.125% 10/01/23 (c)		325,000		300,579
Brookfield Finance, Inc. 4.250% 6/02/26		280,000		315,001
4.350% 4/15/30		405,000		459,273
4.850% 3/29/29		408,000		480,237
GE Capital International Funding Co. Unlimited Co. 4.418% 11/15/35		230,000		233,853
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24  (c)		595,000		398,650
Lazard Group LLC 3.625% 3/01/27		196,000		205,768
3.750% 2/13/25		125,000		132,721
4.500% 9/19/28		275,000		310,176

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
LeasePlan Corp. NV 2.875% 10/24/24  (c)	$	330,000	$	337,430
Legg Mason, Inc. 5.625% 1/15/44		235,000		289,306
Park Aerospace Holdings Ltd. 4.500% 3/15/23  (c)		250,000		228,073
5.250% 8/15/22 (c)		615,000		577,284
The Western Union Co. 2.850% 1/10/25		325,000		338,637
				8,515,425
Electric — 1.1%
Berkshire Hathaway Energy Co. 5.950% 5/15/37		120,000		169,257
The Cleveland Electric Illuminating Co. 5.950% 12/15/36		175,000		226,328
CMS Energy Corp. 4.700% 3/31/43		115,000		138,293
4.875% 3/01/44		180,000		233,554
Elwood Energy LLC 8.159% 7/05/26		173,053		180,841
Enel Finance International NV 6.000% 10/07/39  (c)		175,000		233,017
Entergy Louisiana LLC 4.950% 1/15/45		110,000		119,853
FirstEnergy Corp. 3.400% 3/01/50		200,000		211,183
Indianapolis Power & Light Co. 4.050% 5/01/46  (c)		110,000		130,374
Infraestructura Energetica Nova SAB de CV 3.750% 1/14/28  (c)		200,000		196,000
ITC Holdings Corp. 2.950% 5/14/30  (c)		210,000		223,665
Southwestern Electric Power Co. 6.200% 3/15/40		100,000		137,527
Virginia Electric & Power Co. 6.000% 1/15/36		100,000		138,104
Xcel Energy, Inc. 6.500% 7/01/36		270,000		392,644
				2,730,640
Electronics — 0.1%
Ingram Micro, Inc. 5.450% STEP 12/15/24		335,000		337,688
Entertainment — 0.1%
Wynn Resorts Finance LLC / Wynn Resorts Capital Corp. 5.125% 10/01/29  (c)		382,000		341,413
Foods — 0.7%
Albertsons Cos., Inc. / Safeway, Inc. / New Albertsons LP / Albertson's LLC 4.625% 1/15/27  (c)		521,000		521,000
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30  (c)		700,000		717,500
Mars, Inc. 3.950% 4/01/49  (c)		330,000		411,159
				1,649,659
Forest Products & Paper — 0.1%
Fibria Overseas Finance Ltd. 4.000% 1/14/25		225,000		231,527
Gas — 0.3%
NiSource, Inc. 4.800% 2/15/44		545,000		666,379
Health Care – Products — 0.1%
Dentsply Sirona, Inc. 3.250% 6/01/30		140,000		147,184
Health Care – Services — 0.9%
Centene Corp. 4.625% 12/15/29		153,000		161,415
5.250% 4/01/25 (c)		140,000		144,154
HCA, Inc. 3.500% 9/01/30		1,064,000		1,024,815
5.375% 2/01/25		350,000		374,938
Humana, Inc. 4.800% 3/15/47		130,000		169,455
IHC Health Services, Inc.   4.131% 5/15/48		275,000		355,793
				2,230,570

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Home Builders — 0.9%
Lennar Corp. 4.750% 11/29/27	$	592,000	$	642,320
Mattamy Group Corp. 5.250% 12/15/27  (c)		227,000		225,865
PulteGroup, Inc. 5.000% 1/15/27		198,000		211,860
5.500% 3/01/26		441,000		480,955
Taylor Morrison Communities, Inc. 5.750% 1/15/28  (c)		500,000		515,000
				2,076,000
Housewares — 0.2%
Newell Brands, Inc. 4.700% STEP 4/01/26		200,000		209,882
The Toro Co. 7.800% 6/15/27		170,000		205,926
				415,808
Insurance — 5.3%
Allstate Corp. 3 mo. USD LIBOR + 2.938% 5.750% VRN 8/15/53		890,000		919,406
American International Group, Inc. 3.400% 6/30/30		220,000		237,856
3.900% 4/01/26		135,000		152,526
4.750% 4/01/48		95,000		114,543
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		755,000		779,230
AmTrust Financial Services, Inc. 6.125% 8/15/23		765,000		709,798
Arch Capital Group Ltd. 3.635% 6/30/50		375,000		393,087
Arch Capital Group US, Inc. 5.144% 11/01/43		80,000		100,318
Athene Global Funding 2.500% 1/14/25  (c)		615,000		614,030
Athene Holding Ltd. 4.125% 1/12/28		1,029,000		1,061,540
6.150% 4/03/30		445,000		512,214
AXIS Specialty Finance LLC 3.900% 7/15/29		375,000		400,974
5 year CMT + 3.186% 4.900% VRN 1/15/40		490,000		459,375
AXIS Specialty Finance PLC 4.000% 12/06/27		420,000		441,776
CNO Financial Group, Inc. 5.250% 5/30/25		535,000		592,123
Enstar Group Ltd. 4.500% 3/10/22		495,000		501,496
4.950% 6/01/29		575,000		605,579
Equitable Holdings, Inc. 5.000% 4/20/48		225,000		257,425
Markel Corp. 3.350%  9/17/29		125,000		133,464
5 year CMT + 5.662% 6.000% VRN   (d)		575,000		585,062
MetLife Capital Trust IV 7.875% 12/15/67  (c)		225,000		285,120
The Progressive Corp. 3 mo. USD LIBOR + 2.539% 5.375% VRN   (d)		573,000		567,270
Prudential Financial, Inc. 3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		200,000		212,800
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		350,000		392,264
6.200% 11/15/40		125,000		176,720
Teachers Insurance & Annuity Association of America 4.270% 5/15/47  (c)		175,000		207,709
Trinity Acquisition PLC 4.400% 3/15/26		140,000		159,485
Unum Group 4.000% 6/15/29		155,000		160,124
4.500% 3/15/25		330,000		354,455
USF&G Capital I 8.500% 12/15/45  (c)		95,000		149,899
XLIT Ltd. 5.500% 3/31/45		200,000		267,607
				12,505,275
Internet — 0.3%
Amazon.com, Inc. 4.050% 8/22/47		260,000		338,231
Netflix, Inc. 4.875% 6/15/30  (c)		166,000		178,035
Prosus NV 3.680% 1/21/30  (c)		220,000		230,362
				746,628

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Investment Companies — 1.6%
Ares Capital Corp. 3.500% 2/10/23	$	610,000	$	613,118
4.200% 6/10/24		525,000		537,564
BlackRock TCP Capital Corp. 3.900% 8/23/24		370,000		361,142
4.125% 8/11/22		845,000		847,119
Icahn Enterprises LP/ Icahn Enterprises Finance Corp. 4.750% 9/15/24		500,000		470,100
6.750% 2/01/24		200,000		201,500
Sixth Street Specialty Lending, Inc. 3.875% 11/01/24		770,000		768,127
				3,798,670
Iron & Steel — 0.4%
Steel Dynamics, Inc. 5.000% 12/15/26		385,000		407,485
Vale Overseas Ltd. 6.250% 8/10/26		275,000		323,469
6.875% 11/21/36		150,000		195,975
				926,929
Lodging — 0.2%
MGM Resorts International 4.625% 9/01/26		409,000		372,190
Machinery – Construction & Mining — 0.1%
Caterpillar, Inc. 3.250% 4/09/50		185,000		206,227
Machinery – Diversified — 0.1%
CNH Industrial Capital LLC 1.950% 7/02/23  (e)		130,000		130,853
Media — 2.2%
CCO Holdings LLC/CCO Holdings Capital Corp. 5.000% 2/01/28  (c)		250,000		258,125
Comcast Corp. 3.450% 2/01/50		295,000		338,411
4.600% 8/15/45		400,000		514,226
CSC Holdings LLC 5.750% 1/15/30  (c)		200,000		208,300
Diamond Sports Group LLC/Diamond Sports Finance Co. 5.375% 8/15/26  (c)		250,000		180,938
Discovery Communications LLC 3.950% 3/20/28		130,000		145,268
4.125% 5/15/29		150,000		171,267
4.650% 5/15/50		55,000		62,753
4.875% 4/01/43		200,000		228,146
5.000% 9/20/37		165,000		195,290
DISH DBS Corp. 7.375% 7/01/28  (c) (e)		500,000		496,875
Grupo Televisa SAB 6.625% 3/18/25		475,000		558,661
Time Warner Cable, Inc. 4.500% 9/15/42		250,000		266,176
6.750% 6/15/39		275,000		365,421
Virgin Media Secured Finance PLC 5.500% 5/15/29  (c)		336,000		351,120
VTR Finance NV 6.375% 7/15/28  (c) (e)		900,000		923,643
				5,264,620
Mining — 1.2%
First Quantum Minerals Ltd. 6.875% 3/01/26  (c)		1,000,000		947,500
Glencore Finance Canada Ltd. 5.550% STEP 10/25/42  (c)		149,000		160,463
Glencore Funding LLC 3.875% 10/27/27  (c)		260,000		276,359
4.000% 4/16/25 (c)		180,000		195,602
4.625% 4/29/24 (c)		200,000		218,922
Kinross Gold Corp. 4.500% 7/15/27		225,000		245,417
5.950% 3/15/24		200,000		224,817
Teck Resources Ltd. 3.900% 7/15/30  (c)		220,000		218,977
5.200% 3/01/42		97,000		95,718
6.250% 7/15/41		143,000		156,353
				2,740,128

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Miscellaneous - Manufacturing — 0.2%
Carlisle Cos., Inc. 2.750% 3/01/30	$	314,000	$	323,191
General Electric Co. 6.875% 1/10/39		72,000		88,450
4.125% 10/09/42		12,000		11,457
				423,098
Office Equipment/Supplies — 0.1%
CDW LLC / CDW Finance Corp. 4.250% 4/01/28		206,000		209,926
Oil & Gas — 2.4%
BP Capital Markets PLC 5 year CMT + 4.036% 4.375% VRN   (d)		575,000		583,625
Cenovus Energy, Inc. 4.250% 4/15/27		350,000		316,991
6.750% 11/15/39		175,000		170,391
Continental Resources, Inc. 5.000% 9/15/22		137,000		134,603
Diamondback Energy, Inc. 3.500% 12/01/29		300,000		290,571
EQT Corp. 3.900% 10/01/27		860,000		698,569
6.125% STEP 2/01/25		380,000		378,678
Jupiter Resources, Inc. 10.000% 1/31/24		22,586		20,327
Laredo Petroleum, Inc. 9.500% 1/15/25		138,000		95,393
10.125% 1/15/28		170,000		117,300
Marathon Petroleum Corp. 4.500% 4/01/48		85,000		86,794
6.500% 3/01/41		175,000		216,612
Newfield Exploration Co. 5.750% 1/30/22		93,000		93,177
Occidental Petroleum Corp. 2.600% 4/15/22		153,000		145,778
2.900% 8/15/24		187,000		159,788
6.600% 3/15/46		235,000		204,560
6.950% 7/01/24		177,000		173,571
Ovintiv, Inc. 6.500% 2/01/38		160,000		137,819
Patterson-UTI Energy, Inc. 3.950% 2/01/28		350,000		264,277
5.150% 11/15/29		615,000		466,158
Petroleos Mexicanos 5.350% 2/12/28		190,000		159,600
6.375% 1/23/45		35,000		26,108
6.500% 3/13/27		65,000		58,664
6.625% 6/15/38		51,000		39,690
Saudi Arabian Oil Co. 4.250% 4/16/39  (c)		585,000		650,778
				5,689,822
Oil & Gas Services — 0.2%
National Oilwell Varco, Inc. 3.600% 12/01/29		275,000		269,096
3.950% 12/01/42		314,000		262,415
				531,511
Packaging & Containers — 0.1%
Mauser Packaging Solutions Holding Co. 5.500% 4/15/24  (c)		138,000		135,542
WRKCo, Inc. 3.000% 6/15/33		155,000		161,445
				296,987
Pharmaceuticals — 2.0%
AbbVie, Inc. 4.050% 11/21/39  (c)		230,000		268,976
4.700% 5/14/45		350,000		439,952
Bausch Health Americas, Inc. 9.250% 4/01/26  (c)		400,000		433,960
Bausch Health Cos., Inc. 5.250% 1/30/30  (c)		250,000		237,187
6.125% 4/15/25 (c)		113,000		114,613
7.000% 3/15/24 (c)		115,000		119,312
Bristol-Myers Squibb Co. 4.350% 11/15/47  (c)		205,000		270,716
Cigna Corp. 4.800% 7/15/46  (c)		185,000		232,279
CVS Health Corp.  5.050% 3/25/48		315,000		412,616

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
6.125% 9/15/39	$	25,000	$	35,582
CVS Pass-Through Trust 5.926% 1/10/34  (c)		189,609		211,980
7.507% 1/10/32 (c)		14,044		17,502
McKesson Corp. 4.883% 3/15/44		70,000		84,671
Mylan NV 3.950% 6/15/26		240,000		268,332
5.250% 6/15/46		350,000		433,986
Par Pharmaceutical, Inc. 7.500% 4/01/27  (c)		488,000		500,786
Takeda Pharmaceutical Co. Ltd. 3.375% 7/09/60  (e)		235,000		234,648
Teva Pharmaceutical Finance Netherlands III BV 2.200% 7/21/21		50,000		48,982
Upjohn, Inc. 2.700% 6/22/30  (c)		280,000		287,362
Zoetis, Inc. 4.450% 8/20/48		85,000		109,678
				4,763,120
Pipelines — 2.2%
Cheniere Corpus Christi Holdings LLC 3.700% 11/15/29  (c)		220,000		224,460
Cheniere Energy Partners LP 4.500% 10/01/29  (e)		138,000		138,000
Energy Transfer Operating LP 4.200% 4/15/27		320,000		334,545
4.750% 1/15/26		200,000		217,132
6.125% 12/15/45		280,000		288,574
3 mo. USD LIBOR + 4.028% 6.250% VRN   (d)		740,000		567,950
5 year CMT + 5.134% 6.750% VRN   (d)		270,000		226,595
EnLink Midstream Partners LP 4.150% 6/01/25		339,000		261,030
4.850% 7/15/26		154,000		114,006
3 mo. USD LIBOR + 4.110% 6.000% VRN   (d)		375,000		135,000
Enterprise Products Operating LLC 3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		200,000		179,000
EQM Midstream Partners LP 4.750% 7/15/23		375,000		377,524
MPLX LP 4.500% 4/15/38		195,000		195,037
3 mo. USD LIBOR + 4.652% 6.875% VRN   (d)		850,000		756,500
Plains All American Pipeline LP/PAA Finance Corp. 3.800% 9/15/30		265,000		259,641
4.500% 12/15/26		232,000		243,291
4.700% 6/15/44		260,000		236,977
6.650% 1/15/37		175,000		189,972
Sunoco Logistics Partners Operations LP 5.300% 4/01/44		175,000		167,606
				5,112,840
Private Equity — 0.6%
Apollo Management Holdings LP 5 year CMT + 3.266% 4.950% VRN 1/14/50  (c)		175,000		157,385
Hercules Capital, Inc. 4.625% 10/23/22		945,000		910,422
KKR Group Finance Co. VI LLC 3.750% 7/01/29  (c)		280,000		321,444
				1,389,251
Real Estate Investment Trusts (REITS) — 2.0%
Crown Castle International Corp. 4.750% 5/15/47		70,000		86,604
5.200% 2/15/49		120,000		159,144
ESH Hospitality, Inc. 4.625% 10/01/27  (c)		363,000		339,859
Healthcare Trust of America Holdings LP 3.500% 8/01/26		175,000		189,068
3.750% 7/01/27		240,000		253,245
Iron Mountain, Inc. 5.250% 7/15/30  (c)		250,000		246,250
Service Properties Trust 4.950% 10/01/29		590,000		500,395
Spirit Realty LP 3.200% 1/15/27		220,000		210,169
3.400% 1/15/30		325,000		307,537
4.000% 7/15/29		385,000		379,424
4.450% 9/15/26		59,000		61,156
Store Capital Corp. 4.625% 3/15/29		250,000		255,631
Tanger Properties LP 3.750% 12/01/24		430,000		417,384

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
UDR, Inc. 3.200% 1/15/30	$	145,000	$	158,031
Vereit Operating Partnership LP 3.100% 12/15/29		610,000		587,920
3.400% 1/15/28		105,000		105,810
4.625% 11/01/25		495,000		535,278
				4,792,905
Retail — 0.4%
El Puerto de Liverpool SAB de CV 3.950% 10/02/24  (c)		280,000		285,631
O'Reilly Automotive, Inc. 4.200% 4/01/30		210,000		245,920
Penske Automotive Group, Inc. 5.500% 5/15/26		500,000		498,750
				1,030,301
Semiconductors — 0.2%
KLA Corp. 3.300% 3/01/50		380,000		392,496
Software — 0.3%
CDK Global, Inc. 5.250% 5/15/29  (c)		256,000		265,836
Genesys Telecommunications Laboratories, Inc./Greeneden Lux 3 Sarl/Greeneden US Ho 10.000% 11/30/24  (c)		50,000		52,000
Oracle Corp. 3.600% 4/01/50		210,000		233,705
Solera LLC/ Solera Finance, Inc. 10.500% 3/01/24  (c)		237,000		241,147
				792,688
Telecommunications — 1.7%
AT&T, Inc. 2.300% 6/01/27		215,000		222,583
4.750% 5/15/46		440,000		527,490
5.250% 3/01/37		508,000		628,117
CommScope, Inc. 8.250% 3/01/27  (c)		350,000		359,695
Empresa Nacional de Telecomunicaciones SA 4.875% 10/30/24  (c)		200,000		210,745
Hughes Satellite Systems Corp. 6.625% 8/01/26		444,000		460,819
Qwest Corp 6.750% 12/01/21		156,000		164,862
Sprint Capital Corp. 6.875% 11/15/28		500,000		608,750
T-Mobile USA, Inc. 5.375% 4/15/27		165,000		173,662
Telefonica Emisiones SAU 4.665% 3/06/38		335,000		400,927
Verizon Communications, Inc. 6.550% 9/15/43		157,000		249,648
				4,007,298
Transportation — 0.4%
CSX Corp. 4.750% 11/15/48		145,000		192,509
Kansas City Southern 2.875% 11/15/29		146,000		154,102
Kenan Advantage Group, Inc. 7.875% 7/31/23  (c)		720,000		633,600
Pacific National Finance Pty Ltd. 4.625% 9/23/20  (c)		45,000		45,260
				1,025,471
TOTAL CORPORATE DEBT (Cost $103,536,914)				106,692,919
Municipal Obligations — 0.4%
AccessLex Institute, Revenue Bonds, Series 2004-A, Class A3 1.699% FRN 7/01/39  (f)		150,000		147,841
Brazos Higher Education Authority, Inc., Revenue Bonds, 1.678% FRN 6/25/42  (f)		450,000		424,274
State of California BAB, General Obligation 7.600% 11/01/40		150,000		275,366
				847,481
TOTAL MUNICIPAL OBLIGATIONS (Cost $817,415)				847,481

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Non-U.S. Government Agency Obligations — 28.2%
Automobile ABS — 1.7%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C 4.530%  3/20/23  (c)	$	222,000	$	208,739
Hertz Vehicle Financing II LP Series 2019-2A, Class C, 4.260% 5/25/25  (c)		730,000		661,037
Series 2017-2A, Class C, 5.310% 10/25/23  (c)		100,000		90,138
Hertz Vehicle Financing LP, Series 2018-1A, Class B 3.600%  2/25/24  (c)		650,000		621,945
OneMain Direct Auto Receivables Trust Series 2019-1A, Class C, 4.190% 11/14/28  (c)		888,000		921,509
Series 2019-1A, Class D, 4.680% 4/14/31  (c)		422,000		452,577
Santander Revolving Auto Loan Trust Series 2019-A, Class B, 2.800% 1/26/32  (c)		195,000		186,928
Series 2019-A, Class C, 3.000% 1/26/32  (c)		121,000		120,193
Series 2019-A, Class D, 3.450% 1/26/32  (c)		957,000		952,076
				4,215,142
Commercial MBS — 5.5%
Aventura Mall Trust, Series 2018-AVM, Class D, 4.249% VRN 7/05/40  (c) (f)		530,000		418,547
BAMLL Commercial Mortgage Securities Trust Series 2018-DSNY, Class C, 1 mo. USD LIBOR + 1.350% 1.535% FRN 9/15/34  (c)		150,000		125,442
Series 2019-BPR, Class CMP, 4.024% VRN 11/05/32  (c) (f)		440,000		386,761
Series 2019-BPR, Class DMP, 4.024% VRN 11/05/32  (c) (f)		540,000		431,577
BANK, Series 2019-BN17, Class C, 4.670% VRN 4/15/52  (f)		331,000		316,369
BBCMS Mortgage Trust Series 2018-CHRS, Class B, 4.409% VRN 8/05/38  (c) (f)		400,000		339,080
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38  (c) (f)		280,000		215,543
Series 2018-CHRS, Class D, 4.409% VRN 8/05/38  (c) (f)		270,000		189,514
BHMS Mortgage Trust, Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/15/35  (c)		900,000		830,307
BX Commercial Mortgage Trust Series 2018-IND, Class E, 1 mo. USD LIBOR + 1.700% 1.885% FRN 11/15/35  (c)		504,000		497,626
Series 2019-XL, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 10/15/36  (c)		359,231		344,802
Series 2019-XL, Class F, 1 mo. USD LIBOR + 2.000% 2.185% FRN 10/15/36  (c)		658,271		632,640
CAMB Commercial Mortgage Trust, Series 2019-LIFE, Class E, 1 mo. USD LIBOR + 2.150% 2.335% FRN 12/15/37  (c)		572,453		545,817
Century Plaza Towers Series 2019-CPT, Class D, 3.097% VRN 11/13/39  (c) (f)		225,000		220,719
Series 2019-CPT, Class E, 3.097% VRN 11/13/39  (c) (f)		316,000		285,087
Citigroup Commercial Mortgage Trust Series 2019-GC41, Class C, 3.502% 8/10/56		222,000		200,223
Series 2019-SMRT, Class C, 4.682% 1/10/36  (c)		315,000		324,524
Commercial Mortgage Pass-Through Certificates Series 2014-UBS2, Class AM, 4.199% 3/10/47		100,000		107,545
Series 2015-CR23, Class C, 4.435% VRN 5/10/48  (f)		110,000		108,706
Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class D, 1 mo. USD LIBOR + 1.600% 1.785% FRN 5/15/36  (c)		560,000		542,525
DC Office Trust Series 2019-MTC, Class D, 3.174% VRN 9/15/45  (c) (f)		357,000		324,438
Series 2019-MTC, Class E, 3.174% VRN 9/15/45  (c) (f)		622,000		433,819
GS Mortgage Securities Corp. II, Series 2018-GS10, Class D 3.000%  7/10/51  (c)		599,000		424,566
Hudson Yards Mortgage Trust, Series 2019-30HY, Class E, 3.558% VRN 7/10/39  (c) (f)		630,000		594,720
Jackson Park Trust, Series 2019-LIC, Class D, 3.242% VRN 10/14/39  (c) (f)		686,000		670,854
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2019-OSB, Class E, 3.909% VRN 6/05/39  (c) (f)		553,000		444,532
JPMBB Commercial Mortgage Securities Trust Series 2015-C27, Class C, 4.445% VRN 2/15/48  (f)		1,065,400		975,764
Series 2014-C21, Class C, 4.813% VRN 8/15/47  (f)		300,000		277,505
KNDL Mortgage Trust, Series 2019-KNSQ, Class E, 1 mo. USD LIBOR + 1.800% 1.985% FRN 5/15/36  (c)		263,000		252,824
MFT Trust Series 2020-ABC, Class A, 3.358% 2/06/30  (c)		205,000		210,469
Series 2020-ABC, Class B, 3.477% VRN 2/06/30  (c) (f)		215,000		216,704
MKT Mortgage Trust, Series 2020-525M, Class E, 2.941% VRN 2/12/40  (c) (f)		213,000		192,936
Morgan Stanley Capital I Trust, Series 2019-L2, Class AS 4.272%  3/15/52		400,000		459,226

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Wells Fargo Commercial Mortgage Trust, Series 2015-NXS1, Class C,
3.848% VRN 5/15/48 (f)	$	140,000	$	131,443
WF-RBS Commercial Mortgage Trust
Series 2012-C8, Class C, 5.047% VRN 8/15/45 (f)		100,000		96,183
Series 2011-C5, Class C, 5.845% VRN 11/15/44 (c) (f)		170,000		156,972
Series 2011-C5, Class D, 5.845% VRN 11/15/44 (c) (f)		115,000		103,452
				13,029,761
Home Equity ABS — 0.1%
Credit Suisse Seasoned Loan Trust, Series 2006-1, Class A, 1 mo. USD LIBOR + 0.240%
0.425% FRN 10/25/34 (c)		56,689		56,199
Mastr Asset-Backed Securities Trust, Series 2005, Class NC1 M1, 1 mo. USD LIBOR + .720%
0.905% FRN 12/25/34		95,780		85,783
				141,982
Other ABS — 14.0%
321 Henderson Receivables LLC, Series 2015-1A, Class A
3.260% 9/15/72 (c)		70,743		73,676
AASET Trust
Series 2019-1, Class A, 3.844% 5/15/39 (c)		368,980		333,376
Series 2018-2A, Class A, 4.454% 11/18/38 (c)		617,376		550,536
Series 2019-2, Class C, 6.413% 10/16/39 (c)		1,133,714		422,356
AIMCO CLO Series Ltd., Series 2018-AA, Class B, 3 mo. USD LIBOR + 1.400%
2.535% FRN 4/17/31 (c)		250,000		238,598
Anchorage Capital CLO Ltd.
Series 2020-15A, Class A, 1.000% 7/20/31 (e)		250,000		250,000
Series 2019-11A, Class A, 3 mo. USD LIBOR + 1.390% 2.488% FRN 7/22/32 (c)		500,000		493,285
Series 2019-11A, Class C, 3 mo. USD LIBOR + 3.000% 4.098% FRN 7/22/32 (c)		250,000		247,370
Arbys Funding LLC, Series 2015-1A, Class A2
4.969% 10/30/45 (c)		257,850		261,468
Argent Securities, Inc. Asset-Backed Pass-Through Certificates, Series 2004-W10, Class M1, 1 mo. USD LIBOR + .900%
1.085% FRN 10/25/34		262,755		240,934
Ascentium Equipment Receivables Trust, Series 2019-2A, Class E
3.780% 5/10/27 (c)		787,000		786,395
Atrium XV, Series 15A, Class B, 3 mo. USD LIBOR + 1.750%
2.793% FRN 1/23/31 (c)		250,000		240,408
Avery Point VII CLO Ltd., Series 2015-7A, Class DR, 3 mo. USD LIBOR + 3.600%
4.819% FRN 1/15/28 (c)		250,000		232,216
Benefit Street Partners CLO X Ltd., Series 2016-10A, Class CR, 3 mo. USD LIBOR + 3.500%
4.719% FRN 1/15/29 (c)		250,000		230,835
Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class B, 3 mo. USD LIBOR + 1.950%
3.169% FRN 10/15/32 (c)		250,000		240,550
Blackbird Capital Aircraft Lease Securitization Ltd., Series 2016-1A, Class A,
4.213% STEP 12/16/41 (c)		396,071		332,442
BRE Grand Islander Timeshare Issuer LLC
Series 2017-1A, Class A, 2.940% 5/25/29 (c)		90,356		90,726
Series 2017-1A, Class B, 3.240% 5/25/29 (c)		74,642		73,204
Canyon Capital CLO Ltd., Series 2019-2A, Class C, 3 mo. USD LIBOR + 2.750%
3.969% FRN 10/15/32 (c)		250,000		242,616
Capital Automotive REIT
Series 2014-1A, Class A, 3.660% 10/15/44 (c)		94,902		93,666
Series 2017-1A, Class A2, 4.180% 4/15/47 (c)		150,566		151,054
CARS-DB4 LP
Series 2020-1A, Class B1, 4.170% 2/15/50 (c)		242,000		213,067
Series 2020-1A, Class B3, 4.950% 2/15/50 (c)		671,000		582,900
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A
3.967% 4/15/39 (c)		214,112		187,292
CIFC Funding Ltd., Series 2017-5A, Class A1, 3 mo. USD LIBOR + 1.180%
2.315% FRN 11/16/30 (c)		250,000		246,271
CLI Funding LLC, Series 2014-2A, Class A
3.380% 10/18/29 (c)		41,209		40,589
CLI Funding VI LLC
Series 2017-1A, Class A, 3.620% 5/18/42 (c)		256,543		256,199
Series 2019-1A, Class B, 4.640% 5/18/44 (c)		114,303		112,621
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + .460%
0.645% FRN 9/25/34		1,879		1,666
Crestline Denali CLO XIV Ltd.
Series 2016-1A, Class A1R, 3 mo. USD LIBOR + 1.280% 2.323% FRN 10/23/31 (c)		349,770		336,942
Series 2016-1A, Class BR, 3 mo. USD LIBOR + 1.800% 2.843% FRN 10/23/31 (c)		250,000		233,951

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
CWABS Asset-Backed Certificates Trust, Series 2005-4, Class MV5, 1 mo. USD LIBOR + 1.005%
1.190% FRN 10/25/35	$	440,000	$	416,076
DB Master Finance LLC
Series 2019-1A, Class A2II, 4.021% 5/20/49 (c)		323,555		336,513
Series 2019-1A, Class A23, 4.352% 5/20/49 (c)		292,788		321,334
Domino's Pizza Master Issuer LLC
Series 2019-1A, Class A2, 3.668% 10/25/49 (c)		248,750		260,655
Series 2018-1A, Class A2I, 4.116% 7/25/48 (c)		265,275		281,819
Series 2017-1A, Class A23, 4.118% 7/25/47 (c)		165,750		177,498
Series 2015-1A, Class A2II, 4.474% 10/25/45 (c)		596,750		606,758
Eaton Vance CLO Ltd., Series 2013-1A, Class BRR, 3 mo. USD LIBOR + 2.800%
4.019% FRN 1/15/28 (c)		250,000		244,013
Elara HGV Timeshare Issuer LLC
Series 2016-A, Class A, 2.730% 4/25/28 (c)		116,131		115,549
Series 2016-A, Class B, 3.220% 4/25/28 (c)		70,811		69,445
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450%
2.585% FRN 4/20/31 (c)		450,000		446,031
Elmwood CLO III Ltd., Series 2019-3A, Class A1, 3 mo. USD LIBOR + 1.370%
2.589% FRN 10/15/32 (c)		250,000		245,804
Falcon Aerospace Ltd., Series 2019-1, Class C
6.656% 9/15/39 (c)		368,384		135,759
FCI Funding  LLC, Series 2019-1A, Class A
3.630% 2/18/31 (c)		60,043		60,504
Global SC Finance IV Ltd., Series 2017-1A, Class A
3.850% 4/15/37 (c)		203,050		194,898
Goldentree Loan Management US CLO Ltd., Series 2019-5A, Class C, 3 mo. USD LIBOR + 2.700%
3.835% FRN 10/20/32 (c)		250,000		247,869
Goodgreen Trust
Series 2016-1A, Class A, 3.230% 10/15/52 (c)		263,447		268,390
Series 2017-1A, Class A, 3.740% 10/15/52 (c)		142,956		149,387
Series 2019-2A, Class B, 3.860% 10/15/54 (c)		160,137		159,003
Harbor Park CLO Ltd., Series 2018-1A, Class B1, 3 mo. USD LIBOR + 1.700%
2.835% FRN 1/20/31 (c)		280,000		271,577
Helios Issuer LLC, Series 2017-1A, Class A
4.940% 9/20/49 (c)		258,145		252,739
Hero Funding Trust
Series 2016-3A, Class A1, 3.080% 9/20/42 (c)		127,280		129,882
Series 2017-3A, Class A1, 3.190% 9/20/48 (c)		158,774		162,438
Series 2017-2A, Class A1, 3.280% 9/20/48 (c)		61,024		63,028
Series 2016-4A, Class A2, 4.290% 9/20/47 (c)		125,244		133,317
Horizon Aircraft Finance I Ltd., Series 2018-1, Class B
5.270% 12/15/38 (c)		225,200		123,307
Horizon Aircraft Finance II Ltd., Series 2019-1, Class B
4.703% 7/15/39 (c)		273,167		150,808
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A
3.425% 11/15/39 (c)		508,405		439,592
HPS Loan Management Ltd., Series 15A-19, Class C, 3 mo. USD LIBOR + 2.700%
3.798% FRN 7/22/32 (c)		250,000		243,713
ICG US CLO Ltd., Series 2019-1A, Class A1A, 3 mo. USD LIBOR + 1.380%
2.371% FRN 10/26/32 (c)		250,000		245,266
J.G. Wentworth XLIII LLC, Series 2019-1A, Class B
4.510% 8/15/73 (c)		138,000		146,178
Kayne CLO 4 Ltd., Series 2019-4A, Class B1, 3 mo. USD LIBOR + 2.100%
3.091% FRN 4/25/32 (c)		250,000		246,074
KDAC Aviation Finance Ltd., Series 2017-1A, Class A
4.212% 12/15/42 (c)		338,897		287,451
Kestrel Aircraft Fundig Limited, Series 2018-1A, Class A
4.250% 12/15/38 (c)		389,359		325,118
KKR Financial CLO Ltd., Series 26, Class B1, 3 mo. USD LIBOR + 2.050%
3.269% FRN 7/15/32 (c)		250,000		245,727
KREF Ltd., Series 2018-FL1, Class D, 1 mo. USD LIBOR + 2.550%
2.744% FRN 6/15/36 (c)		450,000		426,280
Labrador Aviation Finance Ltd., Series 2016-1A, Class A1
4.300% 1/15/42 (c)		370,132		308,123
Lunar Aircraft Ltd.
Series 2020-1A, Class A, 3.376% 2/15/45 (c)		403,933		368,751
Series 2020-1A, Class B, 4.335% 2/15/45 (c)		255,013		138,774
Series 2020-1A, Class C, 6.413% 2/15/45 (c)		372,905		137,190
MACH 1 Cayman Ltd., Series 2019-1, Class B
4.335% 10/15/39 (c)		348,982		194,132
Madison Park Funding Ltd., Series 2018-28A, Class B, 3 mo. USD LIBOR + 1.600%
2.819% FRN 7/15/30 (c)		950,000		911,421
Magnetite XV Ltd., Series 2015-15A, Class CR, 3 mo. USD LIBOR + 1.800%
2.791% FRN 7/25/31 (c)		490,000		465,820
Mosaic Solar Loans LLC, Series 2017-1A, Class A
4.450% 6/20/42 (c)		50,474		51,493
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250%
2.385% FRN 10/20/30 (c)		250,000		241,396

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
New Residential Advance Receivables Trust Advance Receivables Backed, Series 2019-T2, Class DT2
3.060% 8/15/53 (c)	$	262,000	$	249,229
NP SPE LLC, Series 2017-1A, Class A2
4.219% 10/21/47 (c)		380,000		389,384
OHA Credit Funding Ltd.
Series 2019-4A, Class A1, 3 mo. USD LIBOR + 1.330% 2.428% FRN 10/22/32 (c)		250,000		245,376
Series 2015-11A, Class CR, 3 mo. USD LIBOR + 2.150% 3.285% FRN 1/20/32 (c)		300,000		287,635
OneMain Financial Issuance Trust
Series 2019-2A, Class A, 3.140% 10/14/36 (c)		1,700,000		1,704,520
Series 2019-2A, Class C, 3.660% 10/14/36 (c)		400,000		338,023
Orange Lake Timeshare Trust, Series 2019-A, Class D
4.930% 4/09/38 (c)		583,769		536,269
Oxford Finance Funding Trust, Series 2020-1A, Class A2
3.101% 2/15/28 (c)		344,000		348,171
Park Place Securities, Inc., Series 2005-WCW3, Class M1, 1 mo. USD LIBOR + .480%
0.665% FRN 8/25/35		43,070		41,952
Pioneer Aircraft Finance Ltd., Series 2019-1, Class B
4.948% 6/15/44 (c)		341,661		188,516
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2
3.858% 12/05/49 (c)		506,455		425,245
PNMAC GMSR Issuer Trust, Series 2018-GT1, Class A, 1 mo. USD LIBOR + 2.850%
3.035% FRN 2/25/23 (c)		210,000		205,815
Popular ABS Mortgage Pass-Through Trust, Series 2006-B, Class A3, 1 mo. USD LIBOR + .280%
0.465% FRN 5/25/36		10,610		10,536
Primose Funding LLC, Series 2019-1A, Class A2
4.475% 7/30/49 (c)		227,856		229,091
Rockford Tower CLO Ltd., Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.720%
2.097% FRN 5/20/31 (c)		250,000		240,232
RR 3 Ltd., Series 2018-3A, Class A1R2, 3 mo. USD LIBOR + 1.090%
2.309% FRN 1/15/30 (c)		500,000		488,268
Sierra Receivables Funding LLC
Series 2015-3A, Class B, 3.080% 9/20/32 (c)		12,151		12,078
Series 2019-2A, Class C, 3.120% 5/20/36 (c)		124,119		112,919
Series 2016-1A, Class B, 3.670% 3/21/33 (c)		28,386		26,486
Series 2019-1A, Class D, 4.750% 1/20/36 (c)		418,236		389,865
Steele Creek CLO Ltd., Series 2018-2A, Class C, 3 mo. USD LIBOR + 2.300%
2.686% FRN 8/18/31 (c)		490,000		458,114
Store Master Funding I-VII and XIV
Series 2019-1, Class A4, 4.490% 11/20/49 (c)		767,754		715,590
Series 2018-1A, Class A4, 4.740% 10/20/48 (c)		238,000		225,638
Sunnova Helios II Issuer LLC, Series 2018-1A, Class A
4.870% 7/20/48 (c)		116,296		115,664
SuttonPark Structured Settlements LLC, Series 2017-1A, Class A
4.190% 1/15/71 (c)		295,060		319,776
Taco Bell Funding LLC
Series 2018-1A, Class A2II, 4.940% 11/25/48 (c)		305,350		320,523
Series 2016-1A, Class A23, 4.970% 5/25/46 (c)		426,800		443,561
Textainer Marine Containers V Ltd.
Series 2017-2A, Class A, 3.520% 6/20/42 (c)		173,812		163,029
Series 2017-1A, Class A, 3.720% 5/20/42 (c)		218,276		208,277
Textainer Marine Containers VII Ltd.
Series 2018-1A, Class A, 4.110% 7/20/43 (c)		344,800		344,708
Series 2019-1A, Class B, 5.280% 4/20/44 (c)		194,027		202,701
THL Credit Wind River CLO Ltd., Series 2018-3A, Class B, 3 mo. USD LIBOR + 1.700%
2.835% FRN 1/20/31 (c)		490,000		466,990
TICP CLO VI  Ltd, Series 2016-6A, Class DR, 3 mo. USD LIBOR + 3.300%
4.519% FRN 1/15/29 (c)		350,000		338,050
TICP CLO XIV Ltd., Series 2019-14A, Class A2, 3 mo. USD LIBOR + 1.900%
3.035% FRN 10/20/32 (c)		250,000		243,797
Trinity Rail Leasing LP
Series 2019-2A, Class A2, 3.100% 10/18/49 (c)		700,000		679,407
Series 2018-1A, Class A2, 4.620% 6/17/48 (c)		430,000		437,534
Triton Container Finance LLC
Series 2017-1A, Class A, 3.520% 6/20/42 (c)		133,455		131,511
Series 2017-2A, Class A, 3.620% 8/20/42 (c)		434,421		438,967
VSE VOI Mortgage LLC, Series 2016-A, Class B
2.740% 7/20/33 (c)		36,365		35,739
Wave USA
4.581% 9/15/44 (c)		608,521		353,264
Westgate Resorts LLC, Series 2017-1A, Class A
3.050% 12/20/30 (c)		83,523		83,234
Willis Engine Structured Trust III, Series 2017-A, Class A,
4.690% STEP 8/15/42 (c)		374,496		318,552

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Willis Engine Structured Trust IV, Series 2018-A, Class A,
4.750% STEP 9/15/43 (c)	$	231,292	$	174,607
				33,172,952
Student Loans ABS — 6.0%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500%
1.685% FRN 7/25/58 (c)		130,000		113,518
College Avenue Student Loans LLC
Series 2019-A, Class C, 4.460% 12/28/48 (c)		225,000		215,480
Series 2019-A, Class D, 5.500% 12/28/48 (c)		174,000		166,156
Commonbond Student Loan Trust, Series 2017-AGS, Class C
5.280% 5/25/41 (c)		81,745		79,327
Credit Suisse ABS Repackaging Trust, Series 2013-A, Class B
2.500% 1/25/30 (c)		91,007		90,619
DRB Prime Student Loan Trust, Series 2015-A, Class A2
3.060% 7/25/31 (c)		40,156		39,371
EdLinc Student Loan Funding Trust, Series 2017-A, Class A, Prime - 1.150%
3.600% FRN 12/01/47 (c)		319,946		315,761
Goal Capital Funding Trust, Series 2006-1, Class B, 3 mo. USD LIBOR + .450%
0.810% FRN 8/25/42		521,044		452,261
KeyCorp Student Loan Trust, Series 1999-B, Class CTFS, 3 mo. USD LIBOR + .900%
1.260% FRN 11/25/36		10,400		10,366
Navient Private Education Refi Loan Trust
Series 2020-DA, Class B, 3.330% 5/15/69 (c)		1,003,000		986,799
Series 2018-CA, Class B, 4.220% 6/16/42 (c)		530,000		533,291
Navient Student Loan Trust
Series 2019-1A, Class A2, 1 mo. USD LIBOR + .900% 1.085% FRN 12/27/67 (c)		700,000		698,019
Series 2019-BA, Class A2B, 1 mo. USD LIBOR + .980% 1.165% FRN 12/15/59 (c)		1,000,000		960,684
Series 2018-1A, Class B, 1 mo. USD LIBOR + 1.200% 1.385% FRN 3/25/67 (c)		250,000		234,557
Series 2018-EA, Class B, 4.440% 12/15/59 (c)		140,000		141,637
Nelnet Private Education Loan Trust
Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.935% FRN 12/26/40 (c)		57,288		54,392
Series 2016-A, Class A1B, 3.600% 12/26/40 (c)		64,170		64,452
Nelnet Student Loan Trust
Series 2006-3, Class B, 3 mo. USD LIBOR + 0.250% 0.547% FRN 6/25/41		124,810		107,693
Series 2012-2A, Class B, 1 mo. USD LIBOR + 1.000% 1.185% FRN 11/25/36 (c)		200,000		179,045
Series 2012-1A, Class B, 1 mo. USD LIBOR + 1.000% 1.185% FRN 6/25/42 (c)		150,000		134,879
Series 2012-4A, Class B, 1 mo. USD LIBOR + 1.000% 1.185% FRN 7/26/49 (c)		350,000		318,287
Series 2005-4, Class A4R2, 28 day ARS 1.191% FRN 3/22/32		150,000		142,893
Series 2018-5A, Class B, 1 mo. USD LIBOR + 1.450% 1.618% FRN 2/25/67 (c)		800,000		751,362
Series 2014-2A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 6/25/41 (c)		100,000		94,237
Series 2014-1A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 10/25/47 (c)		440,000		396,999
Series 2014-5A, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 5/26/54 (c)		100,000		95,064
SLM Student Loan Trust
Series 2006-2, Class R, 0.000% 1/25/41		1,363		696,566
Series 2006-7, Class B, 3 mo. USD LIBOR + 0.200% 1.191% FRN 1/27/42		311,121		275,421
Series 2006-4, Class B, 3 mo. USD LIBOR + 0.200% 1.191% FRN 1/25/70		166,191		148,296
Series 2006-5, Class B, 3 mo. USD LIBOR + 0.210% 1.201% FRN 10/25/40		138,570		123,948
Series 2005-6, Class B, 3 mo. USD LIBOR + 0.290% 1.281% FRN 1/25/44		334,658		261,824
Series 2005-9, Class B, 3 mo. USD LIBOR + 0.300% 1.291% FRN 1/25/41		415,036		365,962
Series 2004-3, Class B, 3 mo. USD LIBOR + 0.470% 1.461% FRN 10/25/64		111,789		99,302
Series 2003-14, Class A7, 3 mo. USD LIBOR + .600% 1.591% FRN 10/25/65 (c)		910,000		857,445
Series 2002-7, Class B, 28 day ARS 4.167% FRN 12/15/39		600,000		557,802
SMB Private Education Loan Trust
Series 2019-A, Class A2B, 1 mo. USD LIBOR + 0.870% 1.055% FRN 7/15/36 (c)		101,000		97,480
Series 2019-A, Class B, 4.000% 11/17/42 (c)		185,000		185,311
Series 2015-C, Class C, 4.500% 9/17/46 (c)		350,000		335,159
SoFi Professional Loan Program LLC
Series 2019-A, Class R1, 0.000% 6/15/48 (c)		1,361,200		334,175
Series 2017-D, Class R1, 0.000% 9/25/40 (c)		1,000,000		347,060
Series 2018-A, Class R1, 0.000% 2/25/42 (c)		1,000,000		482,315
Series 2018-D, Class R1, 0.000% 2/25/48 (c)		911,500		222,133
Series 2017-D, Class BFX, 3.610% 9/25/40 (c)		500,000		497,830
Series 2017-C, Class C, 4.210% VRN 7/25/40 (c) (f)		180,000		180,231
Series 2017-A, Class C, 4.430% VRN 3/26/40 (c) (f)		170,000		156,753
South Carolina Student Loan Corp.
Series 2014-1, Class B, 1 mo. USD LIBOR + 1.500% 1.673% FRN 8/01/35		550,000		527,328

MassMutual Premier Diversified Bond Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2015-A, Class A, 1 mo. USD LIBOR + 1.500% 1.685% FRN 1/25/36	$	91,607	$	88,849
				14,218,339
WL Collateral CMO — 0.9%
Angel Oak Mortgage Trust I LLC
Series 2019-4, Class M1, 3.459% VRN 7/26/49 (c) (f)		492,000		478,117
Series 2019-2, Class M1, 4.065% VRN 3/25/49 (c) (f)		260,000		262,466
Bank of America Mortgage Securities, Series 2004-G, Class 2A7,
4.493% VRN 8/25/34 (f)		13,828		13,434
Countrywide Home Loans, Inc.
Series 2004-2, Class 1A1, 3.668% VRN 2/25/34 (f)		8,319		7,981
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (f)		2,275		2,152
Deephaven Residential Mortgage Trust
Series 2019-3A, Class M1, 3.405% VRN 7/25/59 (c) (f)		800,000		766,156
Series 2019-1A, Class M1, 4.402% VRN 1/25/59 (c) (f)		250,000		253,107
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1,
3.487% VRN 8/25/34 (f)		3,626		3,636
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A,
3.687% VRN 8/25/34 (f)		22,052		21,612
JP Morgan Mortgage Trust, Series 2017-1, Class A11,
3.500% VRN 1/25/47 (c) (f)		352,354		359,278
Merrill Lynch Mortgage Investors, Inc.
Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (f)		1,033		1,012
Series 2003-A4, Class IA, 4.234% VRN 7/25/33 (f)		1,064		1,009
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A,
3.673% VRN 3/25/34 (f)		10,209		10,029
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400%
2.904% FRN 4/25/44		27,378		26,069
				2,206,058
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS                                                                                                       (Cost $72,450,888)				66,984,234
Sovereign Debt Obligations — 0.6%
Colombia Government International Bond
6.125% 1/18/41		440,000		549,340
Mexico Government International Bond
4.750% 3/08/44		354,000		375,240
6.750% 9/27/34		375,000		492,660
				1,417,240
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $1,341,522)				1,417,240
U.S. Government Agency Obligations and Instrumentalities — 18.5%
Collateralized Mortgage Obligations — 0.1%
Federal Home Loan Mortgage Corp.
Series 2617, Class Z, 5.500% 5/15/33		74,166		85,930
Series 2693, Class Z, 5.500% 10/15/33		135,462		152,743
Series 2178, Class PB, 7.000% 8/15/29		7,558		8,597
				247,270
Pass-Through Securities — 17.7%
Federal Home Loan Mortgage Corp.
Pool #QA8791 3.500% 4/01/50		286,894		307,820
Pool #G01311 7.000% 9/01/31		710		827
Pool #C80207 7.500% 9/01/24		474		519
Pool #C00530 7.500% 7/01/27		493		558
Pool #C00563 7.500% 11/01/27		1,748		1,994
Pool #C00612 7.500% 4/01/28		57		65
Pool #C55867 7.500% 2/01/30		2,069		2,331
Federal National Mortgage Association
Pool #MA3984 2.500% 4/01/35		2,437,965		2,553,151
Pool #MA4013 2.500% 5/01/35		2,859,726		2,994,838
Pool #MA3029 3.000% 6/01/32		697,874		735,337
Pool #MA3090 3.000% 8/01/32		295,708		311,397
Pool #AR3007 3.000% 2/01/43		177,272		189,922
Pool #AS1304 3.500% 12/01/28		156,672		167,064
Pool #AV1897 3.500% 12/01/28		27,668		29,504
Pool #AV2325 3.500% 12/01/28		81,075		86,453
Pool #BF0196 3.500% 2/01/41		211,546		228,778
Pool #MA1356 3.500% 2/01/43		1,044,449		1,128,872
Pool #FM1970 3.500% 11/01/49		481,174		520,067
Pool #CA5308 3.500% 3/01/50		1,671,727		1,791,571
Pool #CA6096 3.500% 6/01/50		2,222,156		2,365,488
Pool #725692 1 year CMT + 2.137% 3.957% FRN 10/01/33		33,137		34,887
Pool #888586 1 year CMT + 2.195% 3.973% FRN 10/01/34		91,063		95,873
Pool #BJ0686 4.000% 4/01/48		849,238		902,809

MassMutual Premier Diversified Bond Fund — Portfolio of Investments (Continued)

		Principal Amount		Value
Pool #CA1951 4.000% 7/01/48	$	390,317	$	414,695
Pool #CA2039 4.000% 7/01/48		702,024		745,266
Pool #CA1909 4.500% 6/01/48		1,185,278		1,273,709
Pool #AD6437 5.000% 6/01/40		57,369		65,512
Pool #AD6996 5.000% 7/01/40		366,905		418,985
Pool #AL8173 5.000% 2/01/44		148,559		168,578
Pool #575579 7.500% 4/01/31		3,969		4,643
Pool #535996 7.500% 6/01/31		615		722
Government National Mortgage Association I
Pool #579140 6.500% 1/15/32		593		679
Pool #587280 6.500% 9/15/32		916		1,036
Pool #550659 6.500% 9/15/35		65,462		76,736
Pool #538689 6.500% 12/15/35		15,047		17,712
Pool #780651 7.000% 10/15/27		740		827
Pool #462384 7.000% 11/15/27		402		449
Pool #482668 7.000% 8/15/28		788		892
Pool #581417 7.000% 7/15/32		1,662		1,921
Pool #423836 8.000% 8/15/26		513		573
Pool #444619 8.000% 3/15/27		4,859		5,407
Government National Mortgage Association II
Pool# MA6656 3.000% 5/20/50		2,320,142		2,457,614
Pool# MA6710 3.000% 6/20/50		2,325,000		2,463,487
Government National Mortgage Association II TBA
Pool #24 3.000% 12/01/49  (e)		1,850,000		1,959,771
Pool #471 3.500% 6/01/49  (e)		11,330,000		11,955,806
Uniform Mortgage Backed Securities TBA Pool #1127  3.500% 4/01/49 (e)		5,300,000		5,574,110
				42,059,255

Whole Loans — 0.7%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes
Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.000% FRN 6/25/50  (e)	620,000	620,000
Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050% 2.235% FRN 7/25/49  (c)	321,702	314,259
Federal National Mortgage Association Connecticut Avenue Securities Trust
Series 2019-R04, Class 2M2, 1 mo. USD LIBOR + 2.100% 2.285% FRN 6/25/39  (c)	178,270	174,357
Series 2019-R03, Class 1M2, 1 mo. USD LIBOR + 2.150% 2.335% FRN 9/25/31  (c)	110,581	109,274
Series 2019-R02, Class 1M2, 1 mo. USD LIBOR + 2.300% 2.485% FRN 8/25/31  (c)	365,019	359,343
		1,577,233
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $43,591,059)		43,883,758
U.S. Treasury Obligations — 4.1%
U.S. Treasury Bonds & Notes — 4.1%
U.S. Treasury Bond
2.250% 8/15/49  (g)	3,980,000	4,785,960
3.500% 2/15/39	400,000	565,836
U.S. Treasury Note
0.125% 5/15/23	1,400,000	1,398,071
1.500% 11/30/24	2,800,000	2,953,355
		9,703,222
TOTAL U.S. TREASURY OBLIGATIONS (Cost $9,374,886)		9,703,222
TOTAL BONDS & NOTES (Cost $231,112,684)		229,528,854
TOTAL PURCHASED OPTIONS (#) — 0.2% (Cost $710,400)		468,618
	Number of Shares
Warrants — 0.0%
Consumer, Non-cyclical — 0.0%
Chemicals — 0.0%
Hercules LLC, Expires 3/31/29, Strike 0.09 (a) (b) (h)	150	3,755
TOTAL WARRANTS (Cost $0)		3,755
TOTAL LONG-TERM INVESTMENTS (Cost $232,165,312)		230,270,729

MassMutual Premier Diversified Bond Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 11.3%
Commercial Paper — 11.3%
American Honda Finance Corp. 1.885% 8/21/20	$	2,000,000	$	1,998,550
Avangrid, Inc. 0.254% 8/26/20  (c)		2,000,000		1,998,531
Bayer Corp. 2.553% 7/15/20  (c)		2,000,000		1,999,775
Carnival Corp. 1.902% 11/25/20  (c)		2,000,000		1,944,969
Daimler Finance North America LLC 1.606% 7/13/20  (c)		1,000,000		999,902
DuPont De Nemours, Inc. 0.375% 8/25/20  (c)		2,000,000		1,998,606
Entergy Corp. 0.457% 9/09/20  (c)		2,000,000		1,997,625
FMC Tech, Inc. 1.269% 7/09/20  (c)		3,000,000		2,999,235
General Electric Co. 0.640% 9/17/20		2,000,000		1,997,753
Harley-Davidson Funding Corp. 0.457% 8/05/20  (c)		1,000,000		999,648
0.507% 7/20/20  (c)		2,000,000		1,999,667
LyondellBasell Industries NV 0.203% 7/29/20  (c)		1,000,000		999,745
Mondelez International, Inc. 0.365% 7/28/20  (c)		2,000,000		1,999,513
Suncor Energy, Inc. 0.507% 7/13/20  (c)		3,000,000		2,999,707
				26,933,226
TOTAL SHORT-TERM INVESTMENTS (Cost $26,967,796)				26,933,226
TOTAL INVESTMENTS — 108.4% (Cost $259,133,108) (i)				257,203,955
Other Assets/(Liabilities) — (8.4)%				(20,006,354	)
NET ASSETS — 100.0%			$	237,197,601

Abbreviation Legend 

ABS	Asset-Backed Security
ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMT	Constant Maturity Treasury Index
DAC	Designated Activity Company
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
REIT	Real Estate Investment Trust
SOFR	Secured Overnight Financing Rate
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note
WL	Whole Loan

Notes to Portfolio of Investments 

Percentages are stated as a percent of net assets. 

(a)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2020, these securities amounted to a value of $4,562 or 0.00% of net assets.
(b)	Non-income producing security.
(c)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $112,694,708 or 47.51% of net assets.
(d)	Security is perpetual and has no stated maturity date.
(e)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(f)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at June 30, 2020.
(g)	A portion of this security is pledged/held as collateral for open derivatives.
(h)	Investment was valued using significant unobservable inputs.
(i)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Diversified Bond Fund — Portfolio of Investments (Continued)

(#) Interest Rate Swaptions Purchased
			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD LIBOR BBA	Quarterly	2.44%	Semi-Annually	USD	800,000	$	122,640	$	39,994	$	82,646
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi-Annually	3-Month USD LIBOR BBA	Quarterly	USD	13,410,000	$	345,978	$	670,406	$	(324,428	)
									$	468,618	$	710,400	$	(241,782	)

Forward contracts
Counterparty	Settlement Date	Currency Purchased		Currency Sold		Unrealized Appreciation (Depreciation)
Bank of America N.A.	7/07/20	MXN	14,540,157	USD	584,835	$	47,373
Bank of America N.A.	7/07/20	USD	298,000	MXN	6,505,182		15,153
Bank of America N.A.	7/14/20	RUB	11,745,344	USD	153,386		11,437
Bank of America N.A.	7/14/20	HUF	77,362,870	USD	247,000		(1,579	)
Bank of America N.A.	7/14/20	USD	33,498	EUR	30,856		(1,177	)
Bank of America N.A.	7/14/20	USD	54,000	RUB	3,839,265		123
Bank of America N.A.	7/21/20	JPY	26,432,248	USD	249,686		(4,830	)
Bank of America N.A.	8/04/20	MXN	232,649	USD	10,000		77
Bank of America N.A.	8/10/20	USD	246,000	ILS	862,230		(3,156	)
Bank of America N.A.	8/11/20	USD	187,723	CHF	182,339		(4,955	)
Bank of America N.A.	8/11/20	CHF	44,607	USD	47,000		137
Bank of America N.A.	8/18/20	USD	249,232	SGD	353,022		(4,112	)
Barclays Bank PLC	7/14/20	USD	103,096	CHF	99,609		(2,074	)
Barclays Bank PLC	7/14/20	USD	336,463	HUF	110,224,144		(13,205	)
Barclays Bank PLC	8/18/20	AUD	233,701	USD	151,341		9,971
BNP Paribas SA	7/14/20	ZAR	4,292,379	USD	254,000		(6,966	)
Citibank N.A.	7/07/20	COP	497,723,000	USD	125,532		6,853
Citibank N.A.	7/07/20	CLP	102,796,000	USD	128,856		(3,689	)
Citibank N.A.	7/07/20	USD	118,941	CLP	102,796,000		(6,226	)
Citibank N.A.	7/07/20	USD	121,455	COP	497,723,000		(10,930	)
Citibank N.A.	7/07/20	USD	36,000	BRL	195,444		68
Citibank N.A.	7/14/20	PLN	2,009,483	USD	474,183		33,756

MassMutual Premier Diversified Bond Fund — Portfolio of Investments (Continued)

Forward contracts

Counterparty	Settlement Date	Currency Purchased		Currency Sold			Unrealized Appreciation (Depreciation)
Citibank N.A.	7/14/20	USD	65,021	TRY	450,170		$	(489	)
Citibank N.A.	7/21/20	THB	8,067,180	USD	250,537			10,461
Citibank N.A.	8/04/20	BRL	2,214,241	USD	395,000			11,501
Citibank N.A.	9/18/20	PKR	3,774,046	USD	22,804			(577	)
Citibank N.A.	11/16/20	PKR	6,689,150	USD	41,000			(1,824	)
Goldman Sachs International	7/07/20	USD	347,140	MXN	8,034,975			(2,222	)
Goldman Sachs International	7/14/20	USD	9,000	RUB	677,546			(508	)
Goldman Sachs International	7/21/20	PHP	12,717,823	USD	248,881			6,147
Goldman Sachs International	7/21/20	USD	113,000	AUD	162,052			1,156
Goldman Sachs International	8/04/20	MXN	982,568	USD	39,000			3,560
Goldman Sachs International	8/04/20	BRL	5,618	USD	1,000			31
Goldman Sachs International	8/18/20	USD	3,000	SGD	4,239			(42	)
Goldman Sachs International	10/06/20	MXN	8,034,975	USD	343,044			2,203
JP Morgan Chase Bank N.A.	7/07/20	BRL	1,919,364	USD	361,870			(8,996	)
JP Morgan Chase Bank N.A.	7/07/20	USD	329,362	BRL	1,723,920			12,420
JP Morgan Chase Bank N.A.	7/14/20	EUR	30,856	USD	33,668			1,008
JP Morgan Chase Bank N.A.	7/14/20	USD	186,000	TRY	1,290,003			(1,726	)
JP Morgan Chase Bank N.A.	7/14/20	HUF	32,861,274	USD	103,320			927
JP Morgan Chase Bank N.A.	7/21/20	AUD	367,579	USD	235,315			18,379
JP Morgan Chase Bank N.A.	7/21/20	USD	246,778	THB	8,067,180			(14,220	)
JP Morgan Chase Bank N.A.	7/21/20	USD	246,935	JPY	26,432,248			2,079
JP Morgan Chase Bank N.A.	7/21/20	USD	250,252	PHP	12,717,823			(4,776	)
JP Morgan Chase Bank N.A.	8/04/20	BRL	46,917	USD		8,377		236
JP Morgan Chase Bank N.A.	8/11/20	KZT	29,953,517	USD	71,150			1,941
JP Morgan Chase Bank N.A.	8/11/20	USD	54,041	KZT	24,048,388			(4,640	)
JP Morgan Chase Bank N.A.	10/06/20	BRL	892,344	USD	161,847			1,606
JP Morgan Chase Bank N.A.	11/16/20	PKR	5,521,717	USD	34,131			(1,791	)
							$	93,893

Futures contracts
	Expiration Date	Number of Contracts		Notional Amount		Value/ Net Unrealized Appreciation/ (Depreciation)
Long
U.S. Treasury Long Bond	9/21/20		3	$	535,822	$	(134	)
U.S. Treasury Ultra Bond	9/21/20		71		15,545,934		(56,840	)
U.S. Treasury Note 2 Year	9/30/20		172		37,980,192		2,246
U.S. Treasury Note 5 Year	9/30/20		12		1,508,357		549
						$	(54,179	)

Short
90 Day Eurodollar	9/14/20	2	$	(487,593	)	$	(11,082	)
U.S. Treasury Ultra 10 Year	9/21/20	26		(4,082,425	)		(12,169	)
90 Day Eurodollar	12/14/20	2		(487,568	)		(10,982	)
90 Day Eurodollar	3/15/21	2		(487,743	)		(11,257	)
90 Day Eurodollar	9/13/21	3		(731,728	)		(16,960	)
90 Day Eurodollar	3/14/22	3		(731,503	)		(17,147	)
90 Day Eurodollar	9/19/22	3		(731,203	)		(17,147	)
90 Day Eurodollar	3/13/23	2		(487,168	)		(11,432	)
90 Day Eurodollar	12/18/23	3		(730,078	)		(16,810	)
90 Day Eurodollar	12/16/24	6		(1,458,355	)		(32,495	)
						$	(157,481	)

MassMutual Premier Diversified Bond Fund — Portfolio of Investments (Continued)

Centrally Cleared Credit Default Swaps - Buy Protection
Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 34†	1.00%	Quarterly	6/20/25	USD	1,100,000	$	(13,090	)	$	4,784	$	(17,874	)
CDX.NA.IG Series 34†	1.00%	Quarterly	6/20/25	USD	900,000		(10,519	)		3,196		(13,715	)
						$	(23,609	)	$	7,980	$	(31,589	)

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

Currency Legend 

AUD	Australian Dollar
BRL	Brazilian Real
CHF	Swiss Franc
CLP	Chilean Peso
COP	Colombian Peso
EUR	Euro
HUF	Hungarian Forint
ILS	Israeli Shekel
JPY	Japanese Yen
KZT	Kazakhstan Tenge
MXN	Mexican Peso
PHP	Philippine Peso
PKR	Pakistan Rupee
PLN	Polish Zloty
RUB	Russian Ruble
SGD	Singapore Dollar
THB	Thai Baht
TRY	New Turkish Lira
USD	U.S. Dollar
ZAR	South African Rand

MassMutual Premier High Yield Fund — Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
EQUITIES — 0.1%
COMMON STOCK — 0.1%
Basic Materials — 0.0%
Forest Products & Paper — 0.0%
Appvion Inc. (Escrow Shares) (a) (b) (c)		5,428,000	$	—
The Newark Group, Inc. (b) (c)		329,969		9,899
				9,899
Consumer, Non-cyclical — 0.0%
Agriculture — 0.0%
Pinnacle Operating Corp. (b) (c)		313,098		—
Energy — 0.1%
Oil & Gas — 0.1%
Fieldwood Energy LLC (b)		10,960		549
Fieldwood Energy LLC (b)		44,668		2,233
Jupiter Resources, Inc.		610,239		457,679
				460,461
				460,461
TOTAL COMMON STOCK (Cost $9,232,955)				470,360
TOTAL EQUITIES (Cost $9,232,955)				470,360

	Principal Amount
BONDS & NOTES — 97.0%
BANK LOANS — 3.8%
Aerospace & Defense — 0.3%
Veritas Bermuda Ltd., USD Repriced Term Loan B, 3 mo. LIBOR + 4.500% 5.500% VRN 1/27/23	$	1,822,722	1,680,550
Electronics — 0.1%
Vertafore, Inc., 2018 1st Lien Term Loan, 1 mo. LIBOR + 3.250% 3.434% VRN 7/02/25		413,700	389,138
Oil & Gas — 0.2%
Fieldwood Energy LLC
Exit 1st Lien Term Loan, 0.000% 4/11/22 (d)		3,755,879	682,331
Exit 2nd Lien Term Loan, 0.000% 4/11/23 (d)		3,084,695	18,508
			700,839
Packaging & Containers — 1.5%
BWAY Holding Co., 2017 Term Loan B, 3 mo. LIBOR + 3.250% 4.561% VRN 4/03/24		4,573,422	4,095,133
Consolidated Energy Finance, SA, Term Loan B, 1 mo. LIBOR + 2.500% 2.694% VRN 5/07/25		3,142,594	2,844,048
Trident TPI Holdings, Inc., 2017 USD Term Loan B1, 3 mo. LIBOR + 3.000% 4.072% VRN 10/17/24		675,571	643,482
			7,582,663
Software — 1.7%
Banff Merger Sub, Inc., 2018 USD Term Loan B, 1 mo. LIBOR + 4.250% 4.428% VRN 10/02/25		2,876,114	2,714,333
Finastra USA, Inc.
USD 1st Lien Term Loan, 3 mo. LIBOR + 3.500%, 6 mo. LIBOR + 3.500% 4.500% VRN 6/13/24		3,548,397	3,093,564
USD 2nd Lien Term Loan, 6 mo. LIBOR + 7.250% 8.250% VRN 6/13/25		3,000,000	2,583,330
			8,391,227
TOTAL BANK LOANS (Cost $25,349,801)			18,744,417
CORPORATE DEBT — 93.2%
Advertising — 0.8%
Outfront Media Capital LLC / Outfront Media Capital Corp. 6.250% 6/15/25 (e)		1,461,000	1,470,569
Terrier Media Buyer, Inc. 8.875% 12/15/27 (e)		2,561,000	2,455,359
			3,925,928
Aerospace & Defense — 3.2%
Signature Aviation US Holdings, Inc. 4.000% 3/01/28 (e)		2,864,000	2,588,340
TransDigm, Inc. 5.500% 11/15/27		4,192,000	3,658,358
6.250% 3/15/26 (e)		1,250,000	1,246,900
6.375% 6/15/26		1,510,000	1,375,580
8.000% 12/15/25 (e)		1,076,000	1,130,865
Triumph Group, Inc. 5.250% 6/01/22		1,825,000	1,560,375
6.250% 9/15/24 (e)		1,347,000	1,144,950
7.750% 8/15/25		4,319,000	3,244,649
			15,950,017
Agriculture — 0.3%
JBS Investments II GmbH 7.000% 1/15/26 (e)		1,574,000	1,651,913

MassMutual Premier High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Airlines — 0.8%
American Airlines Group, Inc. 3.750% 3/01/25 (e)	$	6,057,000	$	2,815,839
Mileage Plus Holdings LLC / Mileage Plus Intellectual Property Assets Ltd. 6.500% 6/20/27 (e) (f)		1,137,000		1,139,842
				3,955,681
Apparel — 0.1%
Hanesbrands, Inc. 4.875% 5/15/26 (e)		288,000		290,160
Auto Manufacturers — 3.1%
Allison Transmission, Inc. 4.750% 10/01/27 (e)		2,473,000		2,454,452
Ford Motor Co. 8.500% 4/21/23		1,325,000		1,401,188
9.000% 4/22/25		1,029,000		1,113,584
9.625% 4/22/30		2,103,000		2,490,583
Ford Motor Credit Co. LLC 3.087% 1/09/23		650,000		619,125
3.664% 9/08/24		646,000		608,991
4.134% 8/04/25		771,000		731,255
4.140% 2/15/23		342,000		334,630
4.389% 1/08/26		712,000		677,952
4.687% 6/09/25		1,000,000		976,550
5.113% 5/03/29		322,000		312,929
5.125% 6/16/25		1,236,000		1,236,494
5.596% 1/07/22		396,000		398,970
5.875% 8/02/21		1,796,000		1,813,421
				15,170,124
Auto Parts & Equipment — 0.6%
Adient US LLC 9.000% 4/15/25 (e)		466,000		501,975
Clarios Global LP 6.750% 5/15/25 (e)		452,000		470,080
Clarios Global LP/Clarios US Finance Co. 8.500% 5/15/27 (e)		1,946,000		1,955,633
				2,927,688
Building Materials — 2.1%
Cemex SAB de CV 7.375% 6/05/27 (e)		1,499,000		1,522,984
Griffon Corp. 5.750% 3/01/28		1,258,000		1,242,275
James Hardie International Finance DAC 4.750% 1/15/25 (e)		1,027,000		1,044,972
5.000% 1/15/28 (e)		1,668,000		1,701,360
PGT Innovations, Inc. 6.750% 8/01/26 (e)		1,279,000		1,291,790
Standard Industries, Inc. 4.750% 1/15/28 (e)		3,393,000		3,439,654
				10,243,035
Chemicals — 2.0%
CF Industries, Inc. 4.950% 6/01/43		266,000		286,695
5.375% 3/15/44		1,040,000		1,124,552
Consolidated Energy Finance SA 6.875% 6/15/25 (e)		4,286,000		3,643,100
CVR Partners LP/CVR Nitrogen Finance Corp. 9.250% 6/15/23 (e)		2,352,000		2,304,960
Starfruit Finco BV/Starfruit US Holdco LLC 8.000% 10/01/26 (e)		604,000		618,309
Valvoline, Inc. 4.250% 2/15/30 (e)		1,390,000		1,369,150
4.375% 8/15/25 (e)		653,000		656,265
				10,003,031
Coal — 2.1%
Alliance Resource Operating Partners LP/Alliance Resource Finance Corp. 7.500% 5/01/25 (e)		1,275,000		857,438
Peabody Energy Corp. 6.000% 3/31/22 (e)		8,054,000		5,235,100
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp. 7.500% 6/15/25 (e)		1,841,000		1,556,013
Warrior Met Coal, Inc. 8.000% 11/01/24 (e)		2,960,000		2,886,000
				10,534,551
Commercial Services — 1.1%
Jaguar Holding Co. II / Pharmaceutical Product Development LLC 4.625% 6/15/25 (e)		793,000		807,036
Prime Security Services Borrower LLC / Prime Finance, Inc. 6.250% 1/15/28 (e)		3,925,000		3,699,313
TMS International Holding Corp. 7.250% 8/15/25 (e)		1,046,000		852,490
				5,358,839
Computers — 1.6%
Banff Merger Sub, Inc. 9.750% 9/01/26 (e)		2,072,000		2,084,950
Dell International LLC/EMC Corp. 7.125% 6/15/24 (e)		3,673,000		3,804,998
NCR Corp. 8.125% 4/15/25 (e)		371,000		393,260
Presidio Holdings, Inc. 8.250% 2/01/28 (e)		442,000		442,000
Science Applications International Corp. 4.875% 4/01/28 (e)		861,000		855,886
Western Digital Corp. 4.750% 2/15/26		447,000		461,952
				8,043,046
Distribution & Wholesale — 1.6%
Core & Main Holdings LP 8.625% 9/15/24 (e)		657,000		658,051
Core & Main LP 6.125% 8/15/25 (e)		1,330,000		1,325,545

MassMutual Premier High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
KAR Auction Services, Inc. 5.125% 6/01/25 (e)	$	2,028,000	$	1,997,580
Resideo Funding, Inc. 6.125% 11/01/26 (e)		4,000,000		3,910,000
				7,891,176
Diversified Financial Services — 3.1%
Alliance Data Systems Corp. 4.750% 12/15/24 (e)		3,554,000		3,198,600
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (e)		6,000,000		4,020,000
LPL Holdings, Inc. 4.625% 11/15/27 (e)		1,425,000		1,407,188
5.750% 9/15/25 (e)		4,383,000		4,437,787
Springleaf Finance Corp. 5.375% 11/15/29		2,393,000		2,237,455
				15,301,030
Electric — 1.6%
NRG Energy, Inc. 5.250% 6/15/29 (e)		1,660,000		1,743,000
PG&E Corp. 5.000% 7/01/28		549,000		548,835
5.250% 7/01/30		501,000		503,856
Vistra Operations Co. LLC 3.550% 7/15/24 (e)		2,302,000		2,375,837
4.300% 7/15/29 (e)		2,779,000		2,921,706
				8,093,234
Electrical Components & Equipment — 0.8%
Energizer Holdings, Inc. 7.750% 1/15/27 (e)		1,753,000		1,869,171
WESCO Distribution, Inc. Co. 7.125% 6/15/25 (e)		1,013,000		1,066,821
7.250% 6/15/28 (e)		1,046,000		1,106,145
				4,042,137
Entertainment — 2.3%
Banijay Entertainment SASU 5.375% 3/01/25 (e)		1,083,000		1,058,632
Boyne USA, Inc. 7.250% 5/01/25 (e)		632,000		662,020
Caesars Resort Collection LLC/CRC Finco, Inc. 5.250% 10/15/25 (e)		967,000		841,290
Colt Merger Sub, Inc. 5.750% 7/01/25 (e) (f)		1,035,000		1,040,900
6.250% 7/01/25 (e) (f)		1,847,000		1,835,456
8.125% 7/01/27 (e) (f)		1,347,000		1,301,539
Live Nation Entertainment, Inc. 4.750% 10/15/27 (e)		2,788,000		2,398,265
Scientific Games International, Inc. 5.000% 10/15/25 (e)		873,000		806,006
7.250% 11/15/29 (e)		800,000		640,000
8.250% 3/15/26 (e)		160,000		143,500
8.625% 7/01/25 (e) (f)		627,000		586,057
				11,313,665
Environmental Controls — 0.1%
Clean Harbors, Inc. 4.875% 7/15/27 (e)		638,000		655,545
Foods — 4.3%
Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertson's LLC 7.500% 3/15/26 (e)		713,000		770,040
JBS USA LUX SA/JBS USA Finance, Inc. 5.750% 6/15/25 (e)		1,329,000		1,345,613
6.500% 4/15/29 (e)		4,969,000		5,273,351
6.750% 2/15/28 (e)		2,816,000		2,974,428
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30 (e)		3,745,000		3,838,625
Kraft Heinz Foods Co. 4.625% 1/30/29		2,213,000		2,385,618
5.200% 7/15/45		830,000		900,110
6.500% 2/09/40		2,000,000		2,407,314
6.875% 1/26/39		434,000		536,523
Simmons Foods, Inc. 7.750% 1/15/24 (e)		715,000		745,888
				21,177,510
Hand & Machine Tools — 0.9%
Apex Tool Group LLC/BC Mountain Finance, Inc. 9.000% 2/15/23 (e)		5,236,000		3,783,010
Colfax Corp. 6.375% 2/15/26 (e)		723,000		755,535
				4,538,545
Health Care – Products — 1.6%
Avanos Medical, Inc. 6.250% 10/15/22		3,824,000		3,824,000
Avantor, Inc. 6.000% 10/01/24 (e)		213,000		222,585
Ortho-Clinical Diagnostics, Inc. / Ortho-Clinical Diagnostics SA 7.250% 2/01/28 (e)		3,756,000		3,817,899
				7,864,484
Health Care – Services — 4.3%
Centene Corp. 4.250% 12/15/27		985,000		1,016,431
4.625% 12/15/29		3,765,000		3,972,075
5.250% 4/01/25 (e)		656,000		675,464
5.375% 6/01/26 (e)		226,000		234,285
Envision Healthcare Corp. 8.750% 10/15/26 (e)		5,174,000		2,457,650
HCA, Inc. 3.500% 9/01/30		6,313,000		6,080,505
Molina Healthcare, Inc. 4.375% 6/15/28  (e)		860,000		858,925
Radiology Partners, Inc. 9.250% 2/01/28 (e)		1,333,000		1,256,353
Tenet Healthcare Corp.

MassMutual Premier High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
4.625% 9/01/24 (e)	$	806,000	$	787,865
4.875% 1/01/26 (e)		2,600,000		2,531,750
5.125% 11/01/27 (e)		392,000		386,786
8.125% 4/01/22		968,000		1,016,400
				21,274,489
Home Builders — 2.0%
Brookfield Residential Properties, Inc. 6.375% 5/15/25 (e)		827,000		818,730
Brookfield Residential Properties, Inc. / Brookfield Residential US Corp. 4.875% 2/15/30 (e)		1,165,000		973,474
M/I Homes, Inc. 4.950% 2/01/28		1,544,000		1,534,350
5.625% 8/01/25		1,629,000		1,645,290
Mattamy Group Corp. 4.625% 3/01/30 (e)		4,214,000		4,045,440
TRI Pointe Group, Inc. 5.700% 6/15/28		649,000		658,735
				9,676,019
Household Products & Wares — 0.1%
Spectrum Brands, Inc. 5.000% 10/01/29 (e)		359,000		354,513
Housewares — 0.5%
Newell Brands, Inc. 4.700% STEP 4/01/26		1,351,000		1,417,753
4.875% 6/01/25		544,000		569,726
5.875% STEP 4/01/36		596,000		635,485
				2,622,964
Insurance — 0.7%
Acrisure LLC/Acrisure Finance, Inc. 7.000% 11/15/25 (e)		3,199,000		3,059,044
8.125% 2/15/24 (e)		448,000		465,785
				3,524,829
Internet — 1.3%
Netflix, Inc. 4.875% 6/15/30 (e)		1,353,000		1,451,092
5.375% 11/15/29 (e)		2,115,000		2,316,348
5.875% 2/15/25		368,000		406,640
5.875% 11/15/28		1,961,000		2,233,089
				6,407,169
Investment Companies — 0.9%
Icahn Enterprises LP/Icahn Enterprises Finance Corp. 6.375% 12/15/25		4,385,000		4,341,150
Iron & Steel — 0.6%
Cleveland-Cliffs, Inc. 6.750% 3/15/26 (e)		3,026,000		2,920,090
Leisure Time — 1.2%
Brunswick Corp. 7.375% 9/01/23		650,000		714,977
7.125% 8/01/27		2,494,000		2,784,111
Carlson Travel, Inc. 6.750% 12/15/23 (e)		1,198,000		778,700
9.500% 12/15/24 (e)		3,108,000		1,367,520
Sabre GLBL, Inc. 9.250% 4/15/25 (e)		306,000		322,447
				5,967,755
Lodging — 1.5%
Boyd Gaming Corp. 8.625% 6/01/25 (e)		462,000		482,790
MGM Resorts International 6.750% 5/01/25		1,644,000		1,627,692
Wynn Las Vegas LLC/Wynn Las Vegas Capital Corp. 5.250% 5/15/27 (e)		1,195,000		1,033,077
5.500% 3/01/25 (e)		3,361,000		3,075,315
Wynn Macau Ltd. 5.125% 12/15/29 (e)		1,114,000		1,080,580
				7,299,454
Machinery – Diversified — 0.5%
Clark Equipment Co. 5.875% 6/01/25 (e)		1,260,000		1,288,350
Vertical US Newco, Inc. 5.250% 7/15/27 (f)		1,034,000		1,034,000
				2,322,350
Media — 8.9%
Altice Financing SA 5.000% 1/15/28 (e)		1,325,000		1,316,202
7.500% 5/15/26 (e)		3,289,000		3,445,228
Altice Finco SA 7.625% 2/15/25 (e)		1,198,000		1,245,932
Block Communications, Inc. 4.875% 3/01/28 (e)		1,516,000		1,497,490
CCO Holdings LLC/CCO Holdings Capital Corp. 4.500% 8/15/30 (e)		3,525,000		3,595,500
4.500% 5/01/32 (e)		223,000		225,788
4.750% 3/01/30 (e)		486,000		497,270
5.125% 5/01/27 (e)		872,000		902,171
5.375% 6/01/29 (e)		2,500,000		2,637,500
5.875% 5/01/27 (e)		2,402,000		2,506,367
Clear Channel Worldwide Holdings, Inc. 5.125% 8/15/27 (e)		1,740,000		1,670,400
9.250% 2/15/24		865,000		802,374
CSC Holdings LLC 7.500% 4/01/28 (e)		2,001,000		2,183,591
DISH DBS Corp. 5.000% 3/15/23		902,000		899,835
DISH Network Corp. 3.375% 8/15/26		1,543,000		1,417,422
GCI LLC 6.625% 6/15/24 (e)		1,137,000		1,189,825
LCPR Senior Secured Financing DAC 6.750% 10/15/27 (e)		1,343,000		1,369,860

MassMutual Premier High Yield Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Midcontinent Communications / Midcontinent Finance Corp. 5.375% 8/15/27 (e)	$	930,000	$	944,303
Sirius XM Radio, Inc. 5.375% 7/15/26 (e)		2,668,000		2,755,350
TEGNA, Inc. 4.625% 3/15/28 (e)		1,877,000		1,726,840
Videotron Ltd. 5.125% 4/15/27 (e)		125,000		129,704
Virgin Media Finance PLC 5.000% 7/15/30 (e)		626,000		612,047
Virgin Media Secured Finance PLC 5.500% 8/15/26 (e)		647,000		661,842
5.500% 5/15/29 (e)		7,354,000		7,684,930
Ziggo BV 4.875% 1/15/30 (e)		656,000		659,556
5.500% 1/15/27 (e)		1,449,000		1,467,199
				44,044,526
Mining — 3.8%
Arconic Corp. 6.125% 2/15/28 (e)		455,000		454,886
Compass Minerals International, Inc. 4.875% 7/15/24 (e)		1,040,000		1,042,600
6.750% 12/01/27 (e)		1,855,000		1,947,750
First Quantum Minerals Ltd. 6.500% 3/01/24 (e)		2,110,000		1,991,312
6.875% 3/01/26 (e)		1,191,000		1,128,473
7.500% 4/01/25 (e)		2,796,000		2,677,170
Freeport-McMoRan, Inc. 4.125% 3/01/28		326,000		316,220
Kinross Gold Corp. 4.500% 7/15/27		2,042,000		2,227,294
6.875% 9/01/41		1,177,000		1,434,071
New Gold, Inc. 6.375% 5/15/25 (e)		1,608,000		1,624,080
7.500% 7/15/27 (e)		2,061,000		2,126,313
Northwest Acquisitions ULC/Dominion Finco, Inc. 7.125% 11/01/22 (d) (e)		3,748,000		38,417
Novelis Corp. 4.750% 1/30/30 (e)		1,808,000		1,726,640
				18,735,226
Miscellaneous - Manufacturing — 1.3%
Amsted Industries, Inc. 5.625% 7/01/27 (e)		2,783,000		2,869,969
Gates Global LLC / Gates Corp. 6.250% 1/15/26 (e)		2,800,000		2,751,000
Hillenbrand, Inc. 5.750% 6/15/25		600,000		621,000
				6,241,969
Oil & Gas — 7.7%
Antero Resources Corp. 5.375% 11/01/21		1,684,000		1,557,700
Apache Corp. 4.375% 10/15/28		557,000		491,865
4.750% 4/15/43		278,000		223,814
5.100% 9/01/40		556,000		456,783
5.350% 7/01/49		832,000		663,883
Cenovus Energy, Inc. 4.250% 4/15/27		394,000		356,841
5.400% 6/15/47		581,000		498,774
6.750% 11/15/39		656,000		638,723
Continental Resources, Inc. 3.800% 6/01/24		638,000		596,543
4.375% 1/15/28		719,000		632,878
CVR Energy, Inc. 5.250% 2/15/25 (e)		1,500,000		1,380,000
5.750% 2/15/28 (e)		6,102,000		5,339,250
Endeavor Energy Resources LP / EER Finance, Inc. 6.625% 7/15/25 (e)		1,277,000		1,286,986
Hilcorp Energy I LP / Hilcorp Finance Co. 5.000% 12/01/24 (e)		338,000		290,680
5.750% 10/01/25 (e)		186,000		158,100
6.250% 11/01/28 (e)		768,000		616,320
Jonah Energy LLC/Jonah Energy Finance Corp. 7.250% 10/15/25 (e)		2,599,000		318,377
Jupiter Resources, Inc. 10.000% 1/31/24 (d)		738,589		664,730
Laredo Petroleum, Inc. 9.500% 1/15/25		1,117,000		772,126
10.125% 1/15/28		1,373,000		947,370
MEG Energy Corp. 7.125% 2/01/27 (e)		1,635,000		1,359,094
Nabors Industries Ltd. 7.250% 1/15/26 (e)		769,000		472,935
7.500% 1/15/28 (e)		465,000		285,975
Neptune Energy Bondco PLC 6.625% 5/15/25 (e)		2,750,000		2,392,500
Occidental Petroleum Corp. 3 mo. USD LIBOR + 1.450% 1.842% FRN 8/15/22		392,000		360,716
2.600% 4/15/22		320,000		304,896
2.700% 8/15/22		747,000		695,420
2.700% 2/15/23		299,000		272,464
2.900% 8/15/24		391,000		334,102
3.500% 6/15/25		804,000		679,380
4.100% 2/01/21		1,670,000		1,676,680
4.200% 3/15/48		133,000		90,068
4.400% 4/15/46		838,000		584,522
4.400% 8/15/49		328,000		226,320
4.500% 7/15/44		340,000		234,600
6.450% 9/15/36		146,000		123,370
6.600% 3/15/46		896,000		779,941
6.950% 7/01/24		369,000		361,851
Ovintiv, Inc. 6.500% 8/15/34		458,000		409,179
6.625% 8/15/37		97,000		84,439
Parkland Corp. 5.875% 7/15/27 (e)		1,149,000		1,192,087
PBF Holding Co. LLC / PBF Finance Corp. 6.000% 2/15/28 (e)		5,518,000		4,579,940
7.250% 6/15/25		2,184,000		1,981,980

MassMutual Premier High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
9.250% 5/15/25  (e)	$	806,000	$	860,405
				38,234,607
Oil & Gas Services — 0.5%
Welltec A/S 9.500% 12/01/22  (e)		2,492,000		2,242,800
Packaging & Containers — 1.4%
Graphic Packaging International LLC 3.500% 3/15/28  (e)		2,149,000		2,132,238
Mauser Packaging Solutions Holding Co. 7.250% 4/15/25  (e)		3,211,000		2,911,638
Trident TPI Holdings, Inc. 9.250% 8/01/24  (e)		1,614,000		1,654,350
				6,698,226
Pharmaceuticals — 2.1%
Bausch Health Americas, Inc. 9.250% 4/01/26  (e)		4,611,000		5,002,474
Bausch Health Cos., Inc. 5.000% 1/30/28  (e)		812,000		764,490
5.250% 1/30/30  (e)		916,000		869,055
6.125% 4/15/25  (e)		250,000		253,567
9.000% 12/15/25  (e)		870,000		937,173
Par Pharmaceutical, Inc. 7.500% 4/01/27  (e)		2,647,000		2,716,351
				10,543,110
Pipelines — 2.6%
Buckeye Partners LP 5.850% 11/15/43		277,000		240,380
Cheniere Energy Partners LP 5.625% 10/01/26		2,397,000		2,385,015
DCP Midstream Operating LP 5.125% 5/15/29		98,000		94,019
5.625% 7/15/27		924,000		929,775
6.450% 11/03/36  (e)		43,000		38,700
EQM Midstream Partners LP 6.000% 7/01/25  (e)		777,000		787,039
6.500% 7/01/27  (e)		644,000		659,598
Genesis Energy LP/Genesis Energy Finance Corp. 5.625% 6/15/24		610,000		530,700
6.000% 5/15/23		635,000		571,500
6.250% 5/15/26		290,000		248,785
6.500% 10/01/25		3,466,000		2,963,430
Targa Resources Partners LP/Targa Resources Partners Finance Corp. 5.000% 1/15/28		139,000		130,713
5.500% 3/01/30  (e)		122,000		117,806
6.875% 1/15/29		259,000		271,302
Western Midstream Operating LP 4.050% STEP 2/01/30		618,000		594,881
5.300% 3/01/48		1,707,000		1,384,804
5.450% 4/01/44		850,000		707,880
				12,656,327
Real Estate — 0.1%
Realogy Group LLC/Realogy Co-Issuer Corp. 9.375% 4/01/27  (e)		742,000		691,989
Real Estate Investment Trusts (REITS) — 1.7%
ESH Hospitality, Inc. 4.625% 10/01/27  (e)		1,689,000		1,581,326
Iron Mountain, Inc. 5.250% 7/15/30  (e)		1,273,000		1,253,905
MPT Operating Partnership LP/MPT Finance Corp. 5.000% 10/15/27		1,778,000		1,826,895
RHP Hotel Properties LP/RHP Finance Corp. 5.000% 4/15/23		1,315,000		1,226,238
Ryman Hospitality Properties, Inc. 4.750% 10/15/27  (e)		1,850,000		1,646,500
Service Properties Trust 7.500% 9/15/25		876,000		922,896
				8,457,760
Retail — 2.1%
Asbury Automotive Group, Inc. 4.500% 3/01/28  (e)		940,000		911,800
4.750% 3/01/30  (e)		277,000		270,075
Beacon Roofing Supply, Inc. 4.875% 11/01/25  (e)		1,917,000		1,710,923
Golden Nugget, Inc. 8.750% 10/01/25  (e)		2,982,000		1,684,830
KGA Escrow LLC 7.500% 8/15/23  (e)		2,070,000		2,067,413
Penske Automotive Group, Inc. 5.500% 5/15/26		3,689,000		3,679,777
				10,324,818
Software — 3.4%
CDK Global, Inc. 5.250% 5/15/29  (e)		278,000		288,681
Open Text Corp. 3.875% 2/15/28  (e)		1,384,000		1,332,529
Open Text Holdings, Inc. 4.125% 2/15/30  (e)		1,433,000		1,407,922
RP Crown Parent LLC 7.375% 10/15/24  (e)		1,007,000		1,004,483
Solera LLC/ Solera Finance, Inc. 10.500% 3/01/24  (e)		2,026,000		2,061,455
SS&C Technologies, Inc. 5.500% 9/30/27  (e)		2,853,000		2,894,768
Veritas US, Inc./Veritas Bermuda Ltd. 10.500% 2/01/24  (e)		8,735,000		7,817,825
				16,807,663
Storage & Warehousing — 0.7%
LBC Tank Terminals Holding Netherlands BV 6.875% 5/15/23  (e)		3,188,000		3,217,553
Telecommunications — 6.7%
CenturyLink, Inc.

MassMutual Premier High Yield Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
5.125% 12/15/26  (e)	$	2,211,000	$	2,205,472
6.750% 12/01/23		1,215,000		1,305,870
CommScope Technologies Finance LLC 6.000% 6/15/25  (e)		994,000		959,906
CommScope Technologies LLC 5.000% 3/15/27  (e)		1,015,000		914,211
CommScope, Inc. 6.000% 3/01/26  (e)		617,000		632,425
8.250% 3/01/27  (e)		2,298,000		2,361,655
7.125% 7/01/28  (e) (f)		500,000		498,800
Hughes Satellite Systems Corp. 6.625% 8/01/26		3,035,000		3,149,966
Sprint Capital Corp. 8.750% 3/15/32		2,219,000		3,175,944
Sprint Corp. 7.625% 3/01/26		3,526,000		4,161,985
7.875% 9/15/23		3,858,000		4,345,072
T-Mobile USA, Inc. 4.500% 2/01/26		488,000		493,836
4.750% 2/01/28		1,328,000		1,402,899
5.375% 4/15/27		1,038,000		1,092,495
Telecom Italia Capital 6.000% 9/30/34		704,000		765,248
Telecom Italia SpA 5.303% 5/30/24  (e)		2,027,000		2,115,316
ViaSat, Inc. 5.625% 9/15/25  (e)		1,272,000		1,217,940
5.625% 4/15/27  (e)		796,000		814,905
6.500% 7/15/28  (e)		1,654,000		1,654,347
				33,268,292
Toys, Games & Hobbies — 0.3%
Mattel, Inc. 6.750% 12/31/25  (e)		1,534,000		1,591,525
Transportation — 2.2%
Kenan Advantage Group, Inc. 7.875% 7/31/23  (e)		6,737,000		5,928,560
XPO Logistics, Inc. 6.250% 5/01/25  (e)		500,000		523,750
6.750% 8/15/24  (e)		4,277,000		4,480,585
				10,932,895
TOTAL CORPORATE DEBT (Cost $484,927,804)				460,331,407
TOTAL BONDS & NOTES (Cost $510,277,605)				479,075,824

	Number of Shares
Warrants — 0.0%
Basic Materials— 0.0%
Forest Products & Paper — 0.0%
Appvion Holding Corp. Tranche A, Expires 6/13/23, Strike price 31.25 (a) (b) (c)		5,301		—
Appvion Holding Corp. Tranche B, Expires 6/13/23, Strike price 31.25 (a) (b) (c)		5,301		—
				—
TOTAL WARRANTS (Cost $0)				—
TOTAL LONG-TERM INVESTMENTS (Cost $519,510,560)				479,546,184
TOTAL INVESTMENTS — 97.1% (Cost $519,510,560) (g)				479,546,184
Other Assets/(Liabilities) — 2.9%				14,187,788
NET ASSETS — 100.0%			$	493,733,972

Abbreviation Legend

DAC	Designated Activity Company
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
STEP	Step Up Bond
VRN	Variable Rate Note

Notes to Portfolio of Investments   

Percentages are stated as a percent of net assets.

(a)	Investment was valued using significant unobservable inputs.
(b)	Non-income producing security.
(c)	This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2020, these securities amounted to a value of $9,899 or 0.00% of net assets.
(d)	Security is currently in default due to bankruptcy or failure to make payment of principal or interest of the issuer. Income is not being accrued. At June 30, 2020, these securities amounted to a value of $1,403,986 or 0.28% of net assets.
(e)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $325,606,700 or 65.95% of net assets.
(f)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(g)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Balanced Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 55.2%
Common Stock — 55.1%
Basic Materials — 1.0%
Chemicals — 0.7%
Air Products & Chemicals, Inc.		60	$	14,488
Celanese Corp.		920		79,433
CF Industries Holdings, Inc.		2,325		65,425
Corteva, Inc.		420		11,252
Dow, Inc.		820		33,423
DuPont de Nemours, Inc.		620		32,941
Eastman Chemical Co.		894		62,258
Ecolab, Inc.		4		796
FMC Corp.		500		49,810
International Flavors & Fragrances, Inc.		23		2,816
Linde PLC		134		28,423
LyondellBasell Industries NV Class A		2,180		143,270
The Mosaic Co.		200		2,502
PPG Industries, Inc.		1,388		147,211
The Sherwin-Williams Co.		437		252,520
				926,568
Forest Products & Paper — 0.1%
International Paper Co.		3,607		127,002
Iron & Steel — 0.0%
Nucor Corp.		561		23,231
Mining — 0.2%
Freeport-McMoRan, Inc.		548		6,341
Newmont Corp.		3,784		233,624
				239,965
				1,316,766
Communications — 9.5%
Advertising — 0.1%
The Interpublic Group of Cos., Inc.		3,133		53,762
Omnicom Group, Inc.		1,198		65,411
				119,173
Internet — 6.7%
Alphabet, Inc. Class A (a)		934		1,324,459
Alphabet, Inc. Class C (a)		796		1,125,233
Amazon.com, Inc. (a)		1,096		3,023,667
Booking Holdings, Inc. (a)		234		372,607
CDW Corp.		610		70,870
E*TRADE Financial Corp.		893		44,409
eBay, Inc.		4,765		249,924
Expedia Group, Inc.		103		8,467
F5 Networks, Inc. (a)		200		27,896
Facebook, Inc. Class A (a)		8,440		1,916,471
Netflix, Inc. (a)		432		196,577
NortonLifeLock, Inc.		2,679		53,125
Twitter, Inc. (a)		200		5,958
VeriSign, Inc. (a)		529		109,413
				8,529,076
Media — 0.7%
Charter Communications, Inc. Class A (a)		306		156,072
Comcast Corp. Class A		12,162		474,075
Discovery, Inc. Class A (a) (b)		1,200		25,320
Discovery, Inc. Class C (a)		3,095		59,610
DISH Network Corp. Class A (a)		1,000		34,510
Fox Corp. Class A		2,173		58,280
Fox Corp. Class B		433		11,622
News Corp. Class A		130		1,542
ViacomCBS, Inc. Class B		752		17,536
The Walt Disney Co.		787		87,758
				926,325
Telecommunications — 2.0%
Arista Networks, Inc. (a)		230		48,307
AT&T, Inc.		9,835		297,312
CenturyLink, Inc.		4,254		42,668
Cisco Systems, Inc.		20,524		957,239
Corning, Inc.		1,174		30,407
Juniper Networks, Inc.		1,048		23,957
Motorola Solutions, Inc.		394		55,211
T-Mobile US, Inc. (a)		500		52,075
Verizon Communications, Inc.		17,332		955,513
				2,462,689
				12,037,263
Consumer, Cyclical — 4.5%
Airlines — 0.1%
Alaska Air Group, Inc.		100		3,626
American Airlines Group, Inc. (b)		400		5,228
Delta Air Lines, Inc.		1,100		30,855
Southwest Airlines Co.		666		22,764
United Airlines Holdings, Inc. (a)		300		10,383
				72,856
Apparel — 0.3%
Hanesbrands, Inc. (b)		4,000		45,160
NIKE, Inc. Class B		3,204		314,152
PVH Corp.		240		11,532
Ralph Lauren Corp.		400		29,008
Tapestry, Inc.		84		1,116
Under Armour, Inc. Class C (a)		100		884
VF Corp.		400		24,376
				426,228

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Auto Manufacturers — 0.3%
Cummins, Inc.		1,013	$	175,512
Ford Motor Co.		4,662		28,345
General Motors Co.		4,100		103,730
PACCAR, Inc.		734		54,940
				362,527
Auto Parts & Equipment — 0.0%
BorgWarner, Inc.		700		24,710
Distribution & Wholesale — 0.1%
Copart, Inc. (a)		600		49,962
Fastenal Co.		1,340		57,406
W.W. Grainger, Inc.		164		51,522
				158,890
Home Builders — 0.2%
D.R. Horton, Inc.		759		42,087
Lennar Corp. Class A		1,400		86,268
NVR, Inc. (a)		20		65,175
PulteGroup, Inc.		974		33,145
				226,675
Home Furnishing — 0.1%
Leggett & Platt, Inc.		95		3,339
Whirlpool Corp.		444		57,511
				60,850
Housewares — 0.0%
Newell Brands, Inc.		683		10,846
Leisure Time — 0.0%
Harley-Davidson, Inc.		508		12,075
Norwegian Cruise Line Holdings Ltd. (a)		200		3,286
Royal Caribbean Cruises Ltd. (b)		100		5,030
				20,391
Lodging — 0.3%
Hilton Worldwide Holdings, Inc.		2,200		161,590
Las Vegas Sands Corp.		1,300		59,202
Marriott International, Inc. Class A		1,211		103,819
Wynn Resorts Ltd.		9		670
				325,281
Retail — 3.1%
Advance Auto Parts, Inc.		140		19,943
AutoZone, Inc. (a)		76		85,737
Best Buy Co., Inc.		1,008		87,968
Chipotle Mexican Grill, Inc. (a)		30		31,571
Costco Wholesale Corp.		308		93,389
Darden Restaurants, Inc.		373		28,262
Dollar General Corp.		1,040		198,131
Dollar Tree, Inc. (a)		371		34,384
Domino's Pizza, Inc.		340		125,610
The Gap, Inc.		105		1,325
Genuine Parts Co.		446		38,784
The Home Depot, Inc.		4,620		1,157,356
Kohl's Corp.		1,261		26,191
L Brands, Inc.		600		8,982
Lowe's Cos., Inc.		5,039		680,870
McDonald's Corp.		205		37,816
Nordstrom, Inc. (b)		1,511		23,405
O'Reilly Automotive, Inc. (a)		404		170,355
Ross Stores, Inc.		212		18,071
Starbucks Corp.		1,290		94,931
Target Corp.		1,557		186,731
Tiffany & Co.		111		13,535
The TJX Cos., Inc.		780		39,437
Tractor Supply Co.		510		67,213
Walgreens Boots Alliance, Inc.		1,606		68,078
Walmart, Inc.		3,763		450,732
Yum! Brands, Inc.		1,506		130,887
				3,919,694
Toys, Games & Hobbies — 0.0%
Hasbro, Inc.		387		29,006
				5,637,954
Consumer, Non-cyclical — 12.3%
Agriculture — 0.9%
Altria Group, Inc.		11,841		464,759
Archer-Daniels-Midland Co.		126		5,027
Philip Morris International, Inc.		8,846		619,751
				1,089,537
Beverages — 0.8%
Brown-Forman Corp. Class B		2		127
The Coca-Cola Co.		9,324		416,596
Constellation Brands, Inc. Class A		82		14,346
Molson Coors Beverage Co. Class B		236		8,109
Monster Beverage Corp. (a)		1,250		86,650
PepsiCo, Inc.		3,802		502,853
				1,028,681
Biotechnology — 1.8%
Alexion Pharmaceuticals, Inc. (a)		1,160		130,198
Amgen, Inc.		3,085		727,628
Biogen, Inc. (a)		1,194		319,455
Gilead Sciences, Inc.		6,652		511,805
Illumina, Inc. (a)		30		11,110
Incyte Corp. (a)		40		4,159
Regeneron Pharmaceuticals, Inc. (a)		420		261,933
Vertex Pharmaceuticals, Inc. (a)		1,110		322,244
				2,288,532
Commercial Services — 0.9%
Automatic Data Processing, Inc.		1,111		165,417

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Cintas Corp.		349	$	92,960
Equifax, Inc.		26		4,469
FleetCor Technologies, Inc. (a)		200		50,306
Gartner, Inc. (a)		20		2,427
Global Payments, Inc.		170		28,835
H&R Block, Inc. (b)		2,542		36,300
IHS Markit Ltd.		1,000		75,500
MarketAxess Holdings, Inc.		60		30,055
Moody's Corp.		415		114,013
Nielsen Holdings PLC		600		8,916
PayPal Holdings, Inc. (a)		345		60,109
Quanta Services, Inc.		324		12,710
Robert Half International, Inc.		1,635		86,377
S&P Global, Inc.		889		292,908
United Rentals, Inc. (a)		500		74,520
Verisk Analytics, Inc.		380		64,676
				1,200,498
Cosmetics & Personal Care — 0.8%
Colgate-Palmolive Co.		4,906		359,414
Coty, Inc. Class A		200		894
The Estee Lauder Cos., Inc. Class A		166		31,321
The Procter & Gamble Co.		5,383		643,645
				1,035,274
Foods — 0.6%
Campbell Soup Co.		1,265		62,782
Conagra Brands, Inc.		1,184		41,641
General Mills, Inc.		2,594		159,920
The Hershey Co.		569		73,754
Hormel Foods Corp.		488		23,556
The J.M. Smucker Co.		274		28,992
Kellogg Co.		635		41,948
The Kraft Heinz Co.		173		5,517
The Kroger Co.		4,268		144,472
Lamb Weston Holdings, Inc.		700		44,751
McCormick & Co., Inc.		213		38,214
Mondelez International, Inc. Class A		321		16,413
Sysco Corp.		1,066		58,268
Tyson Foods, Inc. Class A		120		7,165
				747,393
Health Care – Products — 0.7%
Abbott Laboratories		889		81,281
Align Technology, Inc. (a)		60		16,466
Baxter International, Inc.		622		53,554
Boston Scientific Corp. (a)		21		737
The Cooper Cos., Inc.		20		5,673
Danaher Corp.		152		26,878
Dentsply Sirona, Inc.		61		2,688
Edwards Lifesciences Corp. (a)		1,620		111,958
Henry Schein, Inc. (a)		100		5,839
IDEXX Laboratories, Inc. (a)		250		82,540
Intuitive Surgical, Inc. (a)		62		35,330
Medtronic PLC		436		39,981
ResMed, Inc.		300		57,600
Stryker Corp.		639		115,141
Teleflex, Inc.		10		3,640
Thermo Fisher Scientific, Inc.		588		213,056
Varian Medical Systems, Inc. (a)		4		490
West Pharmaceutical Services, Inc.		150		34,076
Zimmer Biomet Holdings, Inc.		4		478
				887,406
Health Care – Services — 1.2%
Anthem, Inc.		708		186,190
Centene Corp. (a)		180		11,439
Cigna Corp.		854		160,253
DaVita, Inc. (a)		846		66,952
HCA Healthcare, Inc.		860		83,472
Humana, Inc.		475		184,181
Laboratory Corp. of America Holdings (a)		1		166
Quest Diagnostics, Inc.		95		10,826
UnitedHealth Group, Inc.		2,561		755,367
Universal Health Services, Inc. Class B		10		929
				1,459,775
Household Products & Wares — 0.4%
Avery Dennison Corp.		382		43,582
Church & Dwight Co., Inc.		400		30,920
The Clorox Co.		707		155,095
Kimberly-Clark Corp.		1,890		267,151
				496,748
Pharmaceuticals — 4.2%
AbbVie, Inc.		9,273		910,423
AmerisourceBergen Corp.		630		63,485
Becton Dickinson and Co.		238		56,946
Bristol-Myers Squibb Co.		11,010		647,388
Cardinal Health, Inc.		955		49,841
CVS Health Corp.		4,246		275,863
Eli Lilly and Co.		4,077		669,362
Johnson & Johnson		7,519		1,057,397
McKesson Corp.		631		96,808
Merck & Co., Inc.		7,129		551,286
Mylan NV (a)		2,659		42,757
Pfizer, Inc.		23,422		765,899
Zoetis, Inc.		1,340		183,634
				5,371,089
				15,604,933
Energy — 1.3%
Oil & Gas — 1.1%
Apache Corp.		198		2,673
Cabot Oil & Gas Corp.		4,692		80,609
Chevron Corp.		4,100		365,843
Concho Resources, Inc.		100		5,150
ConocoPhillips		5,210		218,924
Devon Energy Corp.		917		10,399
Diamondback Energy, Inc.		340		14,219

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
EOG Resources, Inc.		2,702	$	136,883
Exxon Mobil Corp.		4,149		185,543
Hess Corp.		447		23,159
HollyFrontier Corp.		1,400		40,880
Marathon Oil Corp.		1,085		6,640
Marathon Petroleum Corp.		775		28,970
Noble Energy, Inc.		266		2,383
Occidental Petroleum Corp.		558		10,211
Phillips 66		2,345		168,606
Pioneer Natural Resources Co.		3		293
Valero Energy Corp.		630		37,057
				1,338,442
Oil & Gas Services — 0.1%
Baker Hughes Co.		74		1,139
Halliburton Co.		2,271		29,478
National Oilwell Varco, Inc.		1,009		12,360
Schlumberger Ltd.		2,687		49,414
TechnipFMC PLC		72		492
				92,883
Pipelines — 0.1%
Kinder Morgan, Inc.		2,260		34,284
The Williams Cos., Inc.		6,433		122,356
				156,640
				1,587,965
Financial — 7.7%
Banks — 2.3%
Bank of America Corp.		22,742		540,123
The Bank of New York Mellon Corp.		3,495		135,082
Citigroup, Inc.		5,184		264,902
Citizens Financial Group, Inc.		900		22,716
Comerica, Inc.		924		35,204
Fifth Third Bancorp		1,621		31,253
The Goldman Sachs Group, Inc.		758		149,796
Huntington Bancshares, Inc.		1,110		10,029
JP Morgan Chase & Co.		9,675		910,030
KeyCorp		2,272		27,673
M&T Bank Corp.		361		37,533
Morgan Stanley		2,596		125,387
Northern Trust Corp.		511		40,543
The PNC Financial Services Group, Inc.		1,755		184,644
Regions Financial Corp.		3,743		41,622
State Street Corp.		1,385		88,017
SVB Financial Group (a)		100		21,553
Truist Financial Corp.		1,066		40,028
US Bancorp		3,729		137,302
Wells Fargo & Co.		5,364		137,318
Zions Bancorp NA		349		11,866
				2,992,621
Diversified Financial Services — 2.6%
Alliance Data Systems Corp.		930		41,962
American Express Co.		1,708		162,602
Ameriprise Financial, Inc.		805		120,782
BlackRock, Inc.		290		157,786
Capital One Financial Corp.		575		35,989
Cboe Global Markets, Inc.		300		27,984
The Charles Schwab Corp.		2,922		98,588
CME Group, Inc.		275		44,699
Discover Financial Services		1,495		74,885
Franklin Resources, Inc.		848		17,783
Intercontinental Exchange, Inc.		1,310		119,996
Invesco Ltd.		5,923		63,731
Jefferies Financial Group, Inc.		36		560
Mastercard, Inc. Class A		3,850		1,138,445
Nasdaq, Inc.		22		2,628
Raymond James Financial, Inc.		100		6,883
Synchrony Financial		4,000		88,640
T. Rowe Price Group, Inc.		686		84,721
Visa, Inc. Class A		4,700		907,899
The Western Union Co. (b)		3,107		67,173
				3,263,736
Insurance — 1.5%
Aflac, Inc.		1,990		71,700
The Allstate Corp.		1,686		163,525
American International Group, Inc.		1,811		56,467
Aon PLC Class A		276		53,157
Assurant, Inc.		30		3,099
Berkshire Hathaway, Inc. Class B (a)		3,933		702,080
Chubb Ltd.		174		22,032
Cincinnati Financial Corp.		334		21,386
Everest Re Group Ltd.		10		2,062
Globe Life, Inc.		480		35,630
The Hartford Financial Services Group, Inc.		790		30,454
Lincoln National Corp.		1,058		38,924
Loews Corp.		134		4,595
Marsh & McLennan Cos., Inc.		230		24,695
MetLife, Inc.		4,429		161,747
Principal Financial Group, Inc.		1,235		51,302
The Progressive Corp.		2,934		235,043
Prudential Financial, Inc.		1,195		72,775
The Travelers Cos., Inc.		797		90,898
Unum Group		1,435		23,807
				1,865,378
Real Estate — 0.0%
CBRE Group, Inc. Class A (a)		1,098		49,651
Real Estate Investment Trusts (REITS) — 1.3%
Alexandria Real Estate Equities, Inc.		30		4,868
American Tower Corp.		1,658		428,659
Apartment Investment and Management Co. Class A		63		2,371
AvalonBay Communities, Inc.		314		48,557
Boston Properties, Inc.		527		47,630
Crown Castle International Corp.		260		43,511
Digital Realty Trust, Inc.		50		7,106
Duke Realty Corp.		1,400		49,546
Equinix, Inc.		90		63,207

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Equity Residential		1,201	$	70,643
Essex Property Trust, Inc.		240		55,001
Extra Space Storage, Inc.		400		36,948
Federal Realty Investment Trust		10		852
Healthpeak Properties, Inc.		676		18,631
Host Hotels & Resorts, Inc.		1,730		18,667
Iron Mountain, Inc. (b)		1,473		38,445
Kimco Realty Corp.		2,110		27,092
Mid-America Apartment Communities, Inc.		300		34,401
Prologis, Inc.		1,916		178,820
Public Storage		427		81,937
Realty Income Corp.		300		17,850
Regency Centers Corp.		500		22,945
Simon Property Group, Inc.		2,094		143,188
SL Green Realty Corp.		610		30,067
Ventas, Inc.		1,136		41,600
Vornado Realty Trust		1,065		40,694
Welltower, Inc.		1,074		55,579
Weyerhaeuser Co.		93		2,089
				1,610,904
Savings & Loans — 0.0%
People's United Financial, Inc.		1,159		13,410
				9,795,700
Industrial — 4.0%
Aerospace & Defense — 0.9%
The Boeing Co.		316		57,923
General Dynamics Corp.		458		68,453
Howmet Aerospace, Inc.		815		12,918
L3 Harris Technologies, Inc.		176		29,862
Lockheed Martin Corp.		1,621		591,535
Northrop Grumman Corp.		413		126,973
Raytheon Technologies Corp.		2,209		136,118
TransDigm Group, Inc.		160		70,728
				1,094,510
Building Materials — 0.2%
Carrier Global Corp.		4,374		97,190
Johnson Controls International PLC		426		14,543
Masco Corp.		1,594		80,035
Vulcan Materials Co.		8		927
				192,695
Electrical Components & Equipment — 0.2%
AMETEK, Inc.		400		35,748
Emerson Electric Co.		2,843		176,351
				212,099
Electronics — 0.5%
Agilent Technologies, Inc.		373		32,962
Allegion PLC		300		30,666
Amphenol Corp. Class A		132		12,647
FLIR Systems, Inc.		435		17,648
Fortive Corp.		136		9,202
Garmin Ltd.		400		39,000
Honeywell International, Inc.		2,015		291,349
Keysight Technologies, Inc. (a)		600		60,468
Mettler-Toledo International, Inc. (a)		100		80,555
PerkinElmer, Inc.		24		2,354
Roper Technologies, Inc.		24		9,318
TE Connectivity Ltd.		400		32,620
Waters Corp. (a)		300		54,120
				672,909
Engineering & Construction — 0.0%
Jacobs Engineering Group, Inc.		124		10,515
Environmental Controls — 0.1%
Pentair PLC		400		15,196
Republic Services, Inc.		87		7,139
Waste Management, Inc.		1,065		112,794
				135,129
Hand & Machine Tools — 0.0%
Snap-on, Inc.		165		22,854
Stanley Black & Decker, Inc.		2		279
				23,133
Machinery – Construction & Mining — 0.2%
Caterpillar, Inc.		1,560		197,340
Machinery – Diversified — 0.2%
Deere & Co.		1		157
Dover Corp.		203		19,602
Flowserve Corp.		291		8,299
Ingersoll Rand, Inc. (a)		52		1,462
Otis Worldwide Corp.		2,087		118,667
Rockwell Automation, Inc.		766		163,158
Xylem, Inc.		1		65
				311,410
Miscellaneous - Manufacturing — 0.7%
3M Co.		2,375		370,476
Eaton Corp. PLC		1,082		94,653
General Electric Co.		3,186		21,761
Illinois Tool Works, Inc.		1,600		279,760
Parker-Hannifin Corp.		320		58,647
Textron, Inc.		485		15,961
Trane Technologies PLC		560		49,829
				891,087
Packaging & Containers — 0.1%
Amcor PLC		4,300		43,903
Ball Corp.		140		9,729
Packaging Corp. of America		610		60,878
Sealed Air Corp.		47		1,544

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
WestRock Co.		1,105	$	31,227
				147,281
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		170		29,663
Transportation — 0.9%
C.H. Robinson Worldwide, Inc.		254		20,081
CSX Corp.		3,073		214,311
Expeditors International of Washington, Inc.		684		52,011
FedEx Corp.		6		841
Kansas City Southern		260		38,816
Norfolk Southern Corp.		553		97,090
Old Dominion Freight Line, Inc.		280		47,485
Union Pacific Corp.		2,320		392,243
United Parcel Service, Inc. Class B		3,005		334,096
				1,196,974
				5,114,745
Technology — 13.4%
Computers — 4.1%
Accenture PLC Class A		1,770		380,055
Apple, Inc.		11,006		4,014,989
Cognizant Technology Solutions Corp. Class A		1,418		80,571
DXC Technology Co.		1,145		18,893
Fortinet, Inc. (a)		890		122,170
Hewlett Packard Enterprise Co.		1,563		15,208
HP, Inc.		6,163		107,421
International Business Machines Corp.		2,590		312,794
Leidos Holdings, Inc.		100		9,367
NetApp, Inc.		1,409		62,517
Seagate Technology PLC		1,300		62,933
Western Digital Corp.		120		5,298
				5,192,216
Office & Business Equipment — 0.0%
Xerox Holdings Corp.		943		14,418
Zebra Technologies Corp. Class A (a)		170		43,512
				57,930
Semiconductors — 3.5%
Advanced Micro Devices, Inc. (a)		1,600		84,176
Analog Devices, Inc.		217		26,613
Applied Materials, Inc.		3,867		233,760
Broadcom, Inc.		834		263,219
Intel Corp.		18,111		1,083,581
KLA Corp.		818		159,084
Lam Research Corp.		943		305,023
Maxim Integrated Products, Inc.		900		54,549
Microchip Technology, Inc.		344		36,227
Micron Technology, Inc. (a)		2,333		120,196
NVIDIA Corp.		1,915		727,528
QUALCOMM, Inc.		6,788		619,133
Skyworks Solutions, Inc.		490		62,651
Texas Instruments, Inc.		5,135		651,991
Xilinx, Inc.		561		55,197
				4,482,928
Software — 5.8%
Activision Blizzard, Inc.		2,200		166,980
Adobe, Inc. (a)		1,725		750,910
Akamai Technologies, Inc. (a)		310		33,198
Autodesk, Inc. (a)		357		85,391
Broadridge Financial Solutions, Inc.		100		12,619
Cadence Design Systems, Inc. (a)		1,400		134,344
Cerner Corp.		700		47,985
Citrix Systems, Inc.		495		73,215
Electronic Arts, Inc. (a)		1,666		219,995
Fidelity National Information Services, Inc.		130		17,432
Fiserv, Inc. (a)		78		7,614
Intuit, Inc.		859		254,427
Jack Henry & Associates, Inc.		290		53,369
Microsoft Corp.		21,961		4,469,283
MSCI, Inc.		230		76,778
Oracle Corp.		11,088		612,834
Paychex, Inc.		813		61,585
salesforce.com, Inc. (a)		200		37,466
ServiceNow, Inc. (a)		250		101,265
Synopsys, Inc. (a)		360		70,200
Take-Two Interactive Software, Inc. (a)		210		29,310
				7,316,200
				17,049,274
Utilities — 1.4%
Electric — 1.4%
AES Corp.		2,077		30,096
Alliant Energy Corp.		700		33,488
Ameren Corp.		172		12,102
American Electric Power Co., Inc.		196		15,609
CenterPoint Energy, Inc.		635		11,855
CMS Energy Corp.		110		6,426
Consolidated Edison, Inc.		509		36,612
Dominion Energy, Inc.		210		17,048
DTE Energy Co.		92		9,890
Duke Energy Corp.		1,586		126,706
Edison International		134		7,278
Entergy Corp.		201		18,856
Evergy, Inc.		2,400		142,296
Eversource Energy		122		10,159
Exelon Corp.		2,923		106,076
FirstEnergy Corp.		1,766		68,485
NextEra Energy, Inc.		116		27,860
NRG Energy, Inc.		5,920		192,755
Pinnacle West Capital Corp.		250		18,322
PPL Corp.		6,884		177,883
Public Service Enterprise Group, Inc.		2,009		98,762
Sempra Energy		1,752		205,387
The Southern Co.		6,934		359,528
WEC Energy Group, Inc.		364		31,905

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Xcel Energy, Inc.		145	$	9,062
				1,774,446
Gas — 0.0%
NiSource, Inc.		172		3,911
Water — 0.0%
American Water Works Co., Inc.		50		6,433
				1,784,790
TOTAL COMMON STOCK (Cost $62,571,676)				69,929,390
Preferred Stock — 0.1%
Financial — 0.1%
Insurance — 0.1%
The Allstate Corp., 3 mo. USD LIBOR + 3.165%
5.100% VRN		5,000		127,350
TOTAL PREFERRED STOCK (Cost $125,000)				127,350
TOTAL EQUITIES (Cost $62,696,676)				70,056,740

	Principal Amount
Bonds & Notes — 35.4%
Corporate Debt — 13.5%
Aerospace & Defense — 0.0%
Raytheon Technologies Corp. 4.500% 6/01/42	$	30,000	37,389
6.125% 7/15/38		15,000	21,665
			59,054
Agriculture — 0.2%
BAT Capital Corp. 4.700% 4/02/27		45,000	51,432
4.758% 9/06/49		25,000	27,760
Bunge Ltd. Finance Corp. 3.250% 8/15/26		51,000	52,740
4.350% 3/15/24		85,000	92,885
Reynolds American, Inc. 5.850% 8/15/45		35,000	43,021
			267,838
Airlines — 0.1%
American Airlines Pass-Through Trust, Series 2014-1, Class B, 4.375% 4/01/24		7,644	5,495
Spirit Airlines Pass-Through Trust, Series 2015-1, Class A, 4.100% 10/01/29		62,240	52,729
United Airlines Pass-Through Trust, Series 2018-1, Class B, 4.600% 9/01/27		13,067	9,790
			68,014
Auto Manufacturers — 0.4%
Ford Motor Co. 4.346% 12/08/26		50,000	46,640
Ford Motor Credit Co. LLC 3.810% 1/09/24		200,000	192,060
General Motors Co. 4.200% 10/01/27		30,000	30,569
5.150% 4/01/38		20,000	19,169
General Motors Financial Co., Inc. 3.500% 11/07/24		100,000	101,337
4.150% 6/19/23		78,000	81,528
4.200% 11/06/21		52,000	53,327
			524,630
Banks — 1.6%
Bank of America Corp. SOFR + 2.150% 2.592% VRN 4/29/31		55,000	58,198
3 mo. USD LIBOR + 1.060% 3.559% VRN 4/23/27		30,000	33,483
4.183% 11/25/27		45,000	51,501
3 mo. USD LIBOR + 1.814% 4.244% VRN 4/24/38		25,000	30,379
3 mo. USD LIBOR + 1.310% 4.271% VRN 7/23/29		20,000	23,589
4.750% 4/21/45		70,000	92,448
7.750% 5/14/38		20,000	32,696
The Bank of Nova Scotia 4.500% 12/16/25		40,000	45,448
3 mo. USD LIBOR + 2.648% 4.650% VRN   (c)		125,000	117,889
Barclays Bank PLC 10.179% 6/12/21 (d)		160,000	173,023
Citigroup, Inc. 4.450% 9/29/27		30,000	34,250
5.500% 9/13/25		60,000	71,149
5.875% 1/30/42		20,000	29,088
6.000% 10/31/33		17,000	22,429
6.625% 6/15/32		15,000	20,567
8.125% 7/15/39		15,000	25,977
First Republic Bank 4.375% 8/01/46		250,000	290,351
Fulton Financial Corp. 3.600% 3/16/22		45,000	45,974
The Goldman Sachs Group, Inc. 4.250% 10/21/25		35,000	39,399
5.950% 1/15/27		80,000	99,110
6.750% 10/01/37		35,000	50,955
JP Morgan Chase & Co. SOFR + 2.515% 2.956% VRN 5/13/31		45,000	47,726
5.600% 7/15/41		45,000	64,969
Morgan Stanley 4.350% 9/08/26		135,000	155,666
5.000% 11/24/25		40,000	46,717
SVB Financial Group 3.125% 6/05/30		20,000	21,443
3.500% 1/29/25		85,000	89,860

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
The Toronto-Dominion Bank 5 year USD Swap + 2.205% 3.625% VRN 9/15/31	$	50,000	$	56,252
Valley National Bancorp 5.125% 9/27/23		50,000		53,463
Wells Fargo & Co. 5.375% 11/02/43		14,000		18,970
5.606% 1/15/44		15,000		20,689
				1,963,658
Beverages — 0.2%
Anheuser-Busch Cos. LLC/Anheuser-Busch InBev Worldwide, Inc. 4.900% 2/01/46		170,000		208,026
Molson Coors Beverage Co. 4.200% 7/15/46		39,000		37,952
5.000% 5/01/42		5,000		5,297
				251,275
Building Materials — 0.1%
Standard Industries, Inc. 5.000% 2/15/27 (d)		156,000		157,950
Chemicals — 0.3%
CF Industries, Inc. 4.500% 12/01/26 (d)		60,000		65,980
DuPont de Nemours, Inc. 5.319% 11/15/38		55,000		69,733
Huntsman International LLC 5.125% 11/15/22		30,000		31,779
Yara International ASA 3.148% 6/04/30 (d)		15,000		15,506
4.750% 6/01/28 (d)		132,000		151,827
				334,825
Commercial Services — 0.1%
The ADT Security Corp. 6.250% 10/15/21		140,000		143,500
PayPal Holdings, Inc. 3.250% 6/01/50		30,000		32,487
				175,987
Computers — 0.5%
Apple, Inc. 1.650% 5/11/30		50,000		51,107
2.650% 5/11/50		30,000		31,424
Dell International LLC/EMC Corp. 6.020% 6/15/26 (d)		113,000		129,552
Genpact Luxembourg Sarl 3.375% 12/01/24		140,000		144,472
3.700% STEP 4/01/22		65,000		66,741
Leidos Holdings, Inc. 4.450% 12/01/20		200,000		199,425
Leidos, Inc. 4.375% 5/15/30 (d)		25,000		28,161
				650,882
Cosmetics & Personal Care — 0.0%
The Estee Lauder Cos., Inc. 2.375% 12/01/29		45,000		48,186
Diversified Financial Services — 1.2%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust 4.500% 5/15/21		105,000		105,658
Aircastle Ltd. 4.400% 9/25/23		50,000		48,504
5.000% 4/01/23		100,000		97,432
Ally Financial, Inc. 4.125% 2/13/22		65,000		66,790
Antares Holdings LP 6.000% 8/15/23 (d)		250,000		239,798
Ares Finance Co. LLC 4.000% 10/08/24 (d)		85,000		90,194
Avolon Holdings Funding Ltd. 3.250% 2/15/27 (d)		55,000		44,425
Brookfield Finance, Inc. 4.350% 4/15/30		135,000		153,091
4.850% 3/29/29		75,000		88,279
Global Aircraft Leasing Co. Ltd. 6.500% 9/15/24 (d)		60,000		40,200
Lazard Group LLC 3.625% 3/01/27		34,000		35,694
3.750% 2/13/25		20,000		21,235
4.500% 9/19/28		95,000		107,152
Legg Mason, Inc. 5.625% 1/15/44		35,000		43,088
Park Aerospace Holdings Ltd. 4.500% 3/15/23 (d)		50,000		45,615
5.250% 8/15/22 (d)		260,000		244,055
				1,471,210
Electric — 0.8%
Avangrid, Inc. 3.800% 6/01/29		64,000		74,092
The Cleveland Electric Illuminating Co. 3.500% 4/01/28 (d)		25,000		27,385
CMS Energy Corp. 4.700% 3/31/43		25,000		30,064
4.875% 3/01/44		130,000		168,678
Entergy Louisiana LLC 4.950% 1/15/45		40,000		43,583
IPALCO Enterprises, Inc. 3.700% 9/01/24		75,000		80,182
ITC Holdings Corp. 2.950% 5/14/30 (d)		40,000		42,603
Metropolitan Edison Co. 4.300% 1/15/29 (d)		56,000		65,462
Nevada Power Co. 6.650% 4/01/36		20,000		28,361
Pacific Gas and Electric Co. 2.500% 2/01/31		35,000		34,241
Pennsylvania Electric Co. 4.150% 4/15/25 (d)		70,000		77,830

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Puget Energy, Inc. 3.650% 5/15/25	$	5,000	$	5,342
Southwestern Electric Power Co. 6.200% 3/15/40		100,000		137,527
Xcel Energy, Inc. 6.500% 7/01/36		110,000		159,966
				975,316
Electronics — 0.0%
Arrow Electronics, Inc. 3.250% 9/08/24		28,000		29,681
Foods — 0.2%
Ingredion, Inc. 3.200% 10/01/26		27,000		29,252
JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc. 5.500% 1/15/30 (d)		32,000		32,800
Kraft Heinz Foods Co. 3.950% 7/15/25		63,000		66,845
Mars, Inc. 3.950% 4/01/49 (d)		75,000		93,445
				222,342
Forest Products & Paper — 0.0%
Fibria Overseas Finance Ltd. 4.000% 1/14/25		35,000		36,015
Gas — 0.0%
CenterPoint Energy Resources Corp. 6.250% 2/01/37		35,000		46,210
Health Care – Products — 0.0%
Dentsply Sirona, Inc. 3.250% 6/01/30		25,000		26,283
Health Care – Services — 0.1%
Advocate Health & Hospitals Corp. 3.829% 8/15/28		25,000		28,332
Humana, Inc. 4.800% 3/15/47		25,000		32,588
UnitedHealth Group, Inc. 3.125% 5/15/60		40,000		42,820
				103,740
Home Builders — 0.0%
Lennar Corp. 4.750% 5/30/25		30,000		32,025
Housewares — 0.1%
Newell Brands, Inc. 4.350% STEP 4/01/23		89,000		91,652
Insurance — 2.1%
Allstate Corp. 3 mo. USD LIBOR + 2.938% 5.750% VRN 8/15/53		175,000		180,782
American International Group, Inc. 3.900% 4/01/26		100,000		112,982
4.200% 4/01/28		40,000		45,301
4.500% 7/16/44		25,000		29,124
4.750% 4/01/48		15,000		18,086
3 mo. USD LIBOR + 2.868% 5.750% VRN 4/01/48		115,000		118,691
AmTrust Financial Services, Inc. 6.125% 8/15/23		145,000		134,537
Arch Capital Finance LLC 5.031% 12/15/46		30,000		37,497
Arch Capital Group Ltd. 3.635% 6/30/50		55,000		57,653
Athene Global Funding 2.500% 1/14/25 (d)		115,000		114,819
Athene Holding Ltd. 4.125% 1/12/28		240,000		247,590
AXIS Specialty Finance LLC 3.900% 7/15/29		95,000		101,580
5 year CMT + 3.186% 4.900% VRN 1/15/40		55,000		51,562
AXIS Specialty Finance PLC 4.000% 12/06/27		60,000		63,111
Brighthouse Financial, Inc. 3.700% 6/22/27		55,000		56,070
4.700% 6/22/47		50,000		45,448
Brown & Brown, Inc. 4.200% 9/15/24		42,000		45,542
CNO Financial Group, Inc. 5.250% 5/30/25		107,000		118,425
Enstar Group Ltd. 4.500% 3/10/22		70,000		70,919
4.950% 6/01/29		65,000		68,457
Equitable Financial Life Global Funding 1.400% 7/07/25 (d) (e)		50,000		50,029
Equitable Holdings, Inc. 5.000% 4/20/48		40,000		45,764
Markel Corp. 3.350% 9/17/29		25,000		26,693
New York Life Insurance Co. 3.750% 5/15/50 (d)		25,000		28,233
The Progressive Corp. 3 mo. USD LIBOR + 2.539% 5.375% VRN   (c)		70,000		69,300
Prudential Financial, Inc. 3 mo. USD LIBOR + 3.920% 5.625% VRN 6/15/43		45,000		47,880
3 mo. USD LIBOR + 2.665% 5.700% VRN 9/15/48		110,000		123,283
3 mo. USD LIBOR + 4.175% 5.875% VRN 9/15/42		50,000		53,220
Reinsurance Group of America, Inc. 3.150% 6/15/30		55,000		57,061
3.900% 5/15/29		60,000		65,380
Teachers Insurance & Annuity Association of America 4.270% 5/15/47 (d)		35,000		41,542
USF&G Capital I 8.500% 12/15/45 (d)		35,000		55,226
Voya Financial, Inc. 3 mo. USD LIBOR + 2.084% 4.700% VRN 1/23/48		25,000		23,500
Willis North America, Inc. 2.950% 9/15/29		45,000		47,635
4.500% 9/15/28		65,000		75,775
XLIT Ltd. 4.450% 3/31/25		89,000		100,256
				2,628,953

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Principal Amount		Value
Internet — 0.0%
Amazon.com, Inc. 4.050% 8/22/47	$	45,000	$	58,540
Investment Companies — 0.5%
Ares Capital Corp. 3.500% 2/10/23		125,000		125,639
BlackRock TCP Capital Corp. 3.900% 8/23/24		180,000		175,691
4.125% 8/11/22		70,000		70,176
Icahn Enterprises LP/Icahn Enterprises Finance Corp. 6.250% 2/01/22		105,000		105,262
Sixth Street Specialty Lending, Inc. 3.875% 11/01/24		145,000		144,647
				621,415
Iron & Steel — 0.1%
Vale Overseas Ltd. 6.250% 8/10/26		50,000		58,812
6.875% 11/21/36		35,000		45,728
				104,540
Machinery – Construction & Mining — 0.0%
Caterpillar, Inc. 3.250% 4/09/50		35,000		39,016
Machinery – Diversified — 0.1%
CNH Industrial Capital LLC 1.950% 7/02/23 (e)		25,000		25,164
3.875% 10/15/21		95,000		97,363
				122,527
Media — 0.4%
CCO Holdings LLC/CCO Holdings Capital Corp. 5.125% 5/01/27 (d)		30,000		31,038
Charter Communications Operating LLC/Charter Communications Operating Capital 6.484% 10/23/45		35,000		46,279
Comcast Corp. 3.400% 7/15/46		45,000		49,992
3.450% 2/01/50		55,000		63,093
3.969% 11/01/47		25,000		29,642
4.750% 3/01/44		35,000		46,080
Discovery Communications LLC 3.950% 3/20/28		62,000		69,282
4.650% 5/15/50		30,000		34,229
5.000% 9/20/37		25,000		29,589
Grupo Televisa SAB 6.625% 3/18/25		100,000		117,613
Time Warner Cable, Inc. 6.750% 6/15/39		30,000		39,864
				556,701
Mining — 0.3%
Glencore Finance Canada Ltd. 5.550% STEP 10/25/42  (d)		23,000		24,770
Glencore Funding LLC 3.875% 10/27/27 (d)		25,000		26,573
4.625% 4/29/24 (d)		85,000		93,042
Kinross Gold Corp. 4.500% 7/15/27		31,000		33,813
5.125% 9/01/21		135,000		138,737
Teck Resources Ltd. 6.000% 8/15/40		35,000		37,063
				353,998
Miscellaneous - Manufacturing — 0.1%
Carlisle Cos., Inc. 2.750% 3/01/30		59,000		60,727
General Electric Co. 4.125% 10/09/42		5,000		4,774
				65,501
Oil & Gas — 0.6%
Cenovus Energy, Inc. 4.250% 4/15/27		50,000		45,284
6.750% 11/15/39		29,000		28,236
Diamondback Energy, Inc. 3.250% 12/01/26		45,000		45,245
EOG Resources, Inc. 4.950% 4/15/50		5,000		6,378
EQT Corp. 3.000% 10/01/22		65,000		60,450
3.900% 10/01/27		195,000		158,397
6.125% STEP 2/01/25		70,000		69,756
Marathon Petroleum Corp. 4.500% 4/01/48		10,000		10,211
6.500% 3/01/41		35,000		43,322
Newfield Exploration Co. 5.375% 1/01/26		60,000		56,186
5.625% 7/01/24		40,000		38,222
5.750% 1/30/22		66,000		66,126
Occidental Petroleum Corp. 6.600% 3/15/46		81,000		70,508
Ovintiv, Inc. 6.500% 2/01/38		15,000		12,921
Patterson-UTI Energy, Inc. 3.950% 2/01/28		72,000		54,366
Petroleos Mexicanos 5.350% 2/12/28		30,000		25,200
6.375% 1/23/45		15,000		11,189
6.500% 3/13/27		10,000		9,025
6.625% 6/15/38		5,000		3,891
				814,913
Oil & Gas Services — 0.1%
National Oilwell Varco, Inc. 3.600% 12/01/29		70,000		68,497

MassMutual Premier Balanced Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
3.950% 12/01/42	$	60,000	$	50,143
				118,640
Packaging & Containers — 0.1%
Amcor Finance USA, Inc. 3.625% 4/28/26		95,000		104,161
WRKCo, Inc. 3.000% 6/15/33		30,000		31,248
				135,409
Pharmaceuticals — 0.6%
AbbVie, Inc. 4.050% 11/21/39 (d)		40,000		46,778
4.700% 5/14/45		75,000		94,275
Becton Dickinson and Co. 4.685% 12/15/44		25,000		30,785
Bristol-Myers Squibb Co. 4.350% 11/15/47 (d)		30,000		39,617
Cigna Corp. 4.800% 7/15/46 (d)		30,000		37,667
CVS Health Corp. 4.300% 3/25/28		45,000		52,630
5.050% 3/25/48		20,000		26,198
6.125% 9/15/39		10,000		14,233
CVS Pass-Through Trust 5.926% 1/10/34 (d)		45,506		50,875
McKesson Corp. 4.883% 3/15/44		10,000		12,096
6.000% 3/01/41		30,000		38,210
Mylan NV 3.950% 6/15/26		90,000		100,625
5.250% 6/15/46		60,000		74,398
Teva Pharmaceutical Finance Netherlands III BV 2.200% 7/21/21		59,000		57,799
Upjohn, Inc. 2.700% 6/22/30 (d)		55,000		56,446
				732,632
Pipelines — 0.7%
Cheniere Energy Partners LP 4.500% 10/01/29 (e)		45,000		43,594
Energy Transfer Operating LP 4.200% 4/15/27		30,000		31,363
5.875% 1/15/24		30,000		33,399
6.125% 12/15/45		40,000		41,225
3 mo. USD LIBOR + 4.028% 6.250% VRN (c)		95,000		72,912
5 year CMT + 5.134% 6.750% VRN (c)		45,000		37,766
EnLink Midstream Partners LP 4.150% 6/01/25		125,000		96,250
4.850% 7/15/26		24,000		17,767
Enterprise Products Operating LLC 3 mo. USD LIBOR + 3.033% 5.250% VRN 8/16/77		45,000		42,075
3 mo. USD LIBOR + 2.570% 5.375% VRN 2/15/78		30,000		26,850
EQM Midstream Partners LP 4.750% 7/15/23		70,000		70,471
MPLX LP 4.500% 4/15/38		30,000		30,006
6.250% 10/15/22		19,000		19,219
3 mo. USD LIBOR + 4.652% 6.875% VRN (c)		90,000		80,100
Plains All American Pipeline LP 3 mo. USD LIBOR + 4.110% 6.125% VRN (c)		105,000		74,944
Plains All American Pipeline LP/PAA Finance Corp. 3.800% 9/15/30		50,000		48,989
4.500% 12/15/26		67,000		70,261
4.700% 6/15/44		50,000		45,572
Sunoco Logistics Partners Operations LP 5.300% 4/01/44		25,000		23,944
				906,707
Private Equity — 0.2%
Apollo Management Holdings LP 5 year CMT + 3.266% 4.950% VRN 1/14/50 (d)		35,000		31,477
Carlyle Finance Subsidiary LLC 3.500% 9/19/29 (d)		65,000		67,383
Hercules Capital, Inc. 4.625% 10/23/22		70,000		67,439
KKR Group Finance Co. VI LLC 3.750% 7/01/29 (d)		50,000		57,401
				223,700
Real Estate Investment Trusts (REITS) — 0.7%
Alexandria Real Estate Equities, Inc. 2.750% 12/15/29		35,000		37,336
American Tower Trust #1 3.652% 3/15/48 (d)		50,000		53,981
Crown Castle International Corp. 5.200% 2/15/49		26,000		34,481
Healthcare Trust of America Holdings LP 3.500% 8/01/26		75,000		81,029
Highwoods Realty LP 4.125% 3/15/28		20,000		21,391
SBA Tower Trust 2.877% 7/15/46 (d)		40,000		40,066
Service Properties Trust 4.500% 6/15/23		30,000		28,723
4.950% 10/01/29		45,000		38,166
Spirit Realty LP 3.200% 1/15/27		100,000		95,532
3.400% 1/15/30		25,000		23,657
4.000% 7/15/29		55,000		54,203
4.450% 9/15/26		11,000		11,402
Store Capital Corp. 4.625% 3/15/29		62,000		63,397
Tanger Properties LP 3.875% 12/01/23		58,000		56,992
UDR, Inc. 3.200% 1/15/30		35,000		38,145
Vereit Operating Partnership LP 3.100% 12/15/29		115,000		110,837
3.400% 1/15/28		25,000		25,193
4.625% 11/01/25		85,000		91,916

MassMutual Premier Balanced Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
WP Carey, Inc. 4.250% 10/01/26	$	32,000	$	34,934
				941,381
Retail — 0.1%
Starbucks Corp. 2.550% 11/15/30		70,000		73,426
Semiconductors — 0.1%
KLA Corp. 3.300% 3/01/50		75,000		77,467
Microchip Technology, Inc. 3.922% 6/01/21		25,000		25,487
				102,954
Software — 0.2%
Broadridge Financial Solutions, Inc. 2.900% 12/01/29		79,000		84,443
Microsoft Corp. 4.450% 11/03/45		89,000		121,026
				205,469
Telecommunications — 0.5%
AT&T, Inc. 2.300% 6/01/27		40,000		41,411
4.750% 5/15/46		105,000		125,878
5.250% 3/01/37		110,000		136,010
6.250% 3/29/41		5,000		6,856
Crown Castle Towers LLC 4.241% 7/15/48 (d)		40,000		45,763
Qwest Corp 6.750% 12/01/21		29,000		30,647
Sprint Communications, Inc. 9.250% 4/15/22		65,000		71,825
T-Mobile USA, Inc. 2.050% 2/15/28 (d)		45,000		45,021
Telefonaktiebolaget LM Ericsson 4.125% 5/15/22		63,000		65,961
Verizon Communications, Inc. 6.550% 9/15/43		34,000		54,064
				623,436
Transportation — 0.1%
CSX Corp. 4.750% 11/15/48		20,000		26,553
Norfolk Southern Corp. 4.050% 8/15/52		35,000		41,852
Pacific National Finance Pty Ltd. 4.625% 9/23/20 (d)		20,000		20,116
				88,521
Trucking & Leasing — 0.0%
DAE Funding LLC 4.000% 8/01/20 (d)		25,000		24,812
TOTAL CORPORATE DEBT (Cost $16,238,589)				17,079,964
Municipal Obligations — 0.3%
JobsOhio Beverage System Series B, Revenue Bonds, 4.532% 1/01/35		150,000		187,173
State of California BAB, General Obligation 7.550% 4/01/39		120,000		213,683
7.600% 11/01/40		10,000		18,357
				419,213
TOTAL MUNICIPAL OBLIGATIONS (Cost $335,822)				419,213
Non-U.S. Government Agency Obligations — 10.9%
Automobile ABS — 0.4%
Avis Budget Rental Car Funding AESOP LLC, Series 2019-1A, Class C 4.530% 3/20/23 (d)		100,000		94,026
Hertz Vehicle Financing LLC, Series 2018-3A, Class A 4.030% 7/25/24 (d)		201,416		199,229
Santander Revolving Auto Loan Trust Series 2019-A, Class B, 2.800% 1/26/32 (d)		34,000		32,593
Series 2019-A, Class C, 3.000% 1/26/32 (d)		20,000		19,867
Series 2019-A, Class D, 3.450% 1/26/32 (d)		147,000		146,244
				491,959
Commercial MBS — 2.1%
Aventura Mall Trust, Series 2018-AVM, Class C, 4.249% VRN 7/05/40 (d) (f)		190,000		178,279
BANK Series 2019-BN17, Class B, 4.128% VRN 4/15/52 (f)		29,000		31,188
Series 2019-BN16, Class AS, 4.267% 2/15/52		31,333		36,061
Series 2019-BN16, Class B, 4.438% VRN 2/15/52 (f)		24,330		25,421
BBCMS Mortgage Trust Series 2020-C7, Class AS, 2.444% 4/15/53		57,000		59,032
Series 2018-CHRS, Class B, 4.409% VRN 8/05/38 (d) (f)		100,000		84,770
Series 2018-CHRS, Class C, 4.409% VRN 8/05/38 (d) (f)		100,000		76,980
Benchmark Mortgage Trust Series 2019-B14, Class AS, 3.352% 12/15/62		150,000		162,978
Series 2019-B9, Class A4, 3.751% 3/15/52		180,000		207,583
Series 2019-B9, Class A5, 4.016% 3/15/52		250,000		295,462
BHMS Mortgage Trust Series 2018-ATLS, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 7/15/35 (d)		150,000		141,756
Series 2018-ATLS, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/15/35 (d)		100,000		92,256
BX Commercial Mortgage Trust, Series 2018-IND, Class B, 1 mo. USD LIBOR + .900% 1.085% FRN 11/15/35 (d)		70,000		69,292
CD Commercial Mortgage Trust Series 2019-CD8, Class B, 3.366% 8/15/57		78,000		74,989
Series 2019-CD8, Class C, 3.719% 8/15/57		94,000		79,916
Citigroup Commercial Mortgage Trust, Series 2017-C4, Class C, 4.340% VRN 10/12/50 (f)		70,000		63,875
Commercial Mortgage Pass-Through Certificates Series 2013-GAM, Class A1, 1.705% 2/10/28 (d)		13,243		13,200

MassMutual Premier Balanced Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Series 2012-CR4, Class B, 3.703% 10/15/45 (d)	$	35,000	$	21,795
Series 2015-CR23, Class C, 4.435% VRN 5/10/48 (f)		35,000		34,588
Series 2014-UBS5, Class B, 4.514% VRN 9/10/47 (f)		50,000		51,410
Series 2014-LC17, Class C, 4.725% VRN 10/10/47 (f)		100,000		95,199
GS Mortgage Securities Trust, Series 2017-GS6, Class B 3.869% 5/10/50		79,000		84,552
Jackson Park Trust, Series 2019-LIC, Class C, 3.131% VRN 10/14/39 (d) (f)		100,000		101,245
JP Morgan Chase Commercial Mortgage Securities Trust, Series 2016-JP2, Class AS 3.056% 8/15/49		140,000		146,088
JPMDB Commercial Mortgage Securities Trust, Series 2017-C7, Class C, 4.324% VRN 10/15/50 (f)		100,000		91,685
Morgan Stanley Capital I Trust Series 2019-L2, Class AS, 4.272% 3/15/52		100,000		114,807
Series 2018-H3, Class B, 4.620% VRN 7/15/51 (f)		20,000		22,348
Series 2011-C2, Class B, 5.200% VRN 6/15/44 (d) (f)		100,000		100,662
Wells Fargo Commercial Mortgage Trust Series 2018-C45, Class AS, 4.405% VRN 6/15/51 (f)		30,000		34,337
Series 2018-C45, Class B, 4.556% 6/15/51		10,000		10,496
WF-RBS Commercial Mortgage Trust Series 2012-C8, Class B, 4.311% 8/15/45		40,000		39,735
Series 2011-C3, Class B, 4.740% 3/15/44 (d)		50,000		50,524
				2,692,509
Other ABS — 5.1%
321 Henderson Receivables LLC, Series 2015-1A, Class A 3.260% 9/15/72 (d)		106,114		110,513
AASET Trust, Series 2018-2A, Class A 4.454% 11/18/38 (d)		217,386		193,851
Adams Outdoor Advertising LP, Series 2018-1, Class A 4.810% 11/15/48 (d)		97,109		98,719
American Tower Trust #1, Series 13, Class 2A 3.070% 3/15/48 (d)		50,000		50,113
Anchorage Capital CLO Ltd., Series 2019-11A, Class A, 3 mo. USD LIBOR + 1.390% 2.488% FRN 7/22/32 (d)		250,000		246,642
Arbys Funding LLC, Series 2015-1A, Class A2 4.969% 10/30/45 (d)		66,850		67,788
Ascentium Equipment Receivables Trust, Series 2019-2A, Class E 3.780% 5/10/27 (d)		177,000		176,864
BlueMountain CLO XXV Ltd., Series 2019-25A, Class B, 3 mo. USD LIBOR + 1.800% 3.019% FRN 7/15/32 (d)		250,000		239,863
Castlelake Aircraft Securitization Trust, Series 2019-1A, Class A 3.967% 4/15/39 (d)		214,112		187,292
CLI Funding V LLC, Series 2014-1A, Class A 3.290% 6/18/29 (d)		41,771		41,769
Countrywide Asset-Backed Certificates, Series 2004-5, Class 3A, 1 mo. USD LIBOR + .460% 0.645% FRN 9/25/34		305		271
DB Master Finance LLC Series 2019-1A, Class A2II, 4.021% 5/20/49 (d)		74,438		77,419
Series 2019-1A, Class A23, 4.352% 5/20/49 (d)		66,498		72,981
Diamond Resorts Owner Trust, Series 2016-1, Class A 3.080% 11/20/28 (d)		29,743		29,749
Domino's Pizza Master Issuer LLC Series 2019-1A, Class A2, 3.668% 10/25/49 (d)		49,750		52,131
Series 2015-1A, Class A2II, 4.474% 10/25/45 (d)		105,875		107,651
Eaton Vance CLO Ltd., Series 2018-1A, Class B, 3 mo. USD LIBOR + 1.750% 2.969% FRN 10/15/30 (d)		250,000		242,351
Elara HGV Timeshare Issuer LLC, Series 2016-A, Class A 2.730% 4/25/28 (d)		28,325		28,183
Elmwood CLO II Ltd., Series 2019-2A, Class A, 3 mo. USD LIBOR + 1.450% 2.585% FRN 4/20/31 (d)		250,000		247,795
First Franklin Mortgage Loan Trust, Series 2004-FFH4, Class M6, 1 mo. USD LIBOR + 1.725% 1.910% FRN 1/25/35		80,000		73,930
Goodgreen Trust Series 2019-2A, Class A, 2.760% 10/15/54 (d)		124,245		123,106
Series 2016-1A, Class A, 3.230% 10/15/52 (d)		53,765		54,773
Series 2017-1A, Class A, 3.740% 10/15/52 (d)		89,348		93,367
Series 2019-1A, Class A, 3.860% 10/15/54 (d)		130,270		136,397
Helios Issuer LLC, Series 2017-1A, Class A 4.940% 9/20/49 (d)		86,048		84,246
Hero Funding Trust Series 2016-4A, Class A1, 3.570% 9/20/47 (d)		60,303		63,141
Series 2018-1A, Class A2, 4.670% 9/20/48 (d)		72,023		77,046
Highbridge Loan Management Ltd., Series 13A-18, Class C, 3 mo. USD LIBOR + 2.150% 3.369% FRN 10/15/30 (d)		250,000		236,045
Horizon Aircraft Finance III Ltd., Series 2019-2, Class A 3.425% 11/15/39 (d)		339,583		293,620
J.G. Wentworth LLC, Series 2017-1A, Class B 5.430% 8/15/62 (d)		200,000		205,547
KKR Financial CLO Ltd., Series 24, Class A1, 3 mo. USD LIBOR + 1.360% 2.495% FRN 4/20/32 (d)		250,000		247,654
MP CLO III Ltd., Series 2013-1A, Class AR, 3 mo. USD LIBOR + 1.250% 2.385% FRN 10/20/30 (d)		250,000		241,395
OneMain Financial Issuance Trust, Series 2019-2A, Class A 3.140% 10/14/36 (d)		330,000		330,877
Orange Lake Timeshare Trust, Series 2016-A, Class B 2.910% 3/08/29 (d)		13,873		11,874
Oxford Finance Funding Trust Series 2020-1A, Class A2, 3.101% 2/15/28 (d)		68,000		68,825
Series 2016-1A, Class A, 3.968% 6/17/24 (d)		9,281		9,322
Planet Fitness Master Issuer LLC, Series 2019-1A, Class A2 3.858% 12/05/49 (d)		92,535		77,697
Rockford Tower CLO Ltd., Series 2019-1A, Class B1, 3 mo. USD LIBOR + 2.050% 3.185% FRN 4/20/32 (d)		300,000		292,448
SBA Tower Trust, Series 2014-2A, Class C, 3.869% STEP 10/15/49 (d)		100,000		105,603
Sierra Receivables Funding LLC Series 2015-3A, Class B, 3.080% 9/20/32 (d)		11,046		10,980
Series 2018-3A, Class C, 4.170% 9/20/35 (d)		112,988		108,628
Store Master Funding I-VII, Series 2019-1, Class A2 3.650% 11/20/49 (d)		115,595		109,065
Taco Bell Funding LLC Series 2018-1A, Class A2II, 4.940% 11/25/48 (d)		39,400		41,358
Series 2016-1A, Class A23, 4.970% 5/25/46 (d)		218,250		226,821
Textainer Marine Containers V Ltd. Series 2017-2A, Class A, 3.520% 6/20/42 (d)		113,356		106,323
Series 2017-1A, Class A, 3.720% 5/20/42 (d)		71,566		68,288

MassMutual Premier Balanced Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Textainer Marine Containers VII Ltd., Series 2018-1A, Class A 4.110% 7/20/43 (d)	$	86,200	$	86,177
Trinity Rail Leasing LP Series 2019-2A, Class A2, 3.100% 10/18/49 (d)		122,000		118,411
Series 2018-1A, Class A2, 4.620% 6/17/48 (d)		230,000		234,030
WAVE Trust, Series 2017-1A, Class B 5.682% 11/15/42 (d)		202,760		101,676
Welk Resorts LLC, Series 2015-AA, Class A 2.790% 6/16/31 (d)		9,415		9,334
Willis Engine Structured Trust III, Series 2017-A, Class A, 4.690% STEP 8/15/42 (d)		208,053		176,974
				6,496,923
Student Loans ABS — 3.1%
Access Group, Inc., Series 2015-1, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 7/25/58 (d)		100,000		87,322
College Loan Corp. Trust I, Series 2007-1, Class B2, 28 day ARS FRN 1/25/47		35,000		27,648
Commonbond Student Loan Trust, Series 2017-AGS, Class B 3.470% 5/25/41 (d)		76,139		73,104
Earnest Student Loan Program LLC, Series 2016-B, Class A1, 1 mo. USD LIBOR + 2.050% 2.235% FRN 2/26/35 (d)		11,888		11,181
ECMC Group Student Loan Trust Series 2018-2A, Class A, 1 mo. USD LIBOR + 0.800% 0.985% FRN 9/25/68 (d)		74,193		70,683
Series 2017-1A, Class A, 1 mo. USD LIBOR + 1.200% 1.385% FRN 12/27/66 (d)		63,973		62,698
Series 2016-1A, Class A, 1 mo. USD LIBOR + 1.350% 1.518% FRN 7/26/66 (d)		78,480		76,110
EdLinc Student Loan Funding Trust Series 2017-A, Class A, Prime - 1.150% 3.600% FRN 12/01/47 (d)		53,324		52,627
Series 2012-1, Class B, 1 mo. USD LIBOR + 4.240% 4.425% FRN 11/26/40 (d)		65,000		68,420
Education Loan Asset-Backed Trust I, Series 2003-2, Class 2A1, 28 day ARS FRN 8/01/43 (d)		50,000		46,175
ELFI Graduate Loan Program LLC, Series 2019-A, Class B, 2.940% VRN 3/25/44 (d) (f)		151,000		145,493
KnowledgeWorks Foundation, Series 2010-1, Class A, 3 mo. USD LIBOR + .950% 1.310% FRN 2/25/42		20,527		19,912
Navient Private Education Refi Loan Trust Series 2019-EA, Class A2B, 1 mo. USD LIBOR + .920% 1.105% FRN 5/15/68 (d)		100,000		95,373
Series 2019-EA, Class B, 3.390% 5/15/68 (d)		156,000		155,606
Navient Student Loan Trust Series 2016-1A, Class A, 1 mo. USD LIBOR + .700% 0.885% FRN 2/25/70 (d)		60,119		56,963
Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.800% 0.985% FRN 3/25/67 (d)		100,000		98,714
Series 2016-7A, Class A, 1 mo. USD LIBOR + 1.150% 1.335% FRN 3/25/66 (d)		129,679		126,584
Series 2016-5A, Class A, 1 mo. USD LIBOR + 1.250% 1.435% FRN 6/25/65 (d)		69,961		68,532
Series 2016-6A, Class A3, 1 mo. USD LIBOR + 1.300% 1.485% FRN 3/25/66 (d)		210,000		194,894
Series 2018-4A, Class B, 1 mo. USD LIBOR + 1.300% 1.485% FRN 6/27/67 (d)		100,000		93,779
Series 2015-3, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 10/25/58		40,000		32,727
Series 2019-BA, Class B, 4.040% 12/15/59 (d)		150,000		156,076
Nelnet Private Education Loan Trust Series 2016-A, Class A1A, 1 mo. USD LIBOR + 1.750% 1.935% FRN 12/26/40 (d)		22,915		21,757
Series 2016-A, Class A1B, 3.600% 12/26/40 (d)		22,918		23,019
Nelnet Student Loan Trust Series 2018-3A, Class A3, 1 mo. USD LIBOR + 0.750% 0.935% FRN 9/27/66 (d)		100,000		97,400
Series 2018-5A, Class B, 1 mo. USD LIBOR + 1.450% 1.618% FRN 2/25/67 (d)		200,000		187,841
Series 2019-5, Class A, 2.530% 10/25/67 (d)		284,848		284,752
SLC Student Loan Trust, Series 2005-1, Class B, 3 mo. USD LIBOR + .200% 0.592% FRN 2/15/45		38,504		33,971
SLM Student Loan Trust Series 2003-11, Class B, 3 mo. USD LIBOR + 0.650% 0.963% FRN 12/15/38		83,907		74,451
Series 2005-4, Class B, 3 mo. USD LIBOR + .180% 1.171% FRN 7/25/55		220,451		186,418
Series 2006-5, Class B, 3 mo. USD LIBOR + 0.210% 1.201% FRN 10/25/40		128,870		115,271
Series 2006-2, Class B, 3 mo. USD LIBOR + 0.220% 1.211% FRN 1/25/41		55,098		49,393
Series 2005-6, Class B, 3 mo. USD LIBOR + 0.290% 1.281% FRN 1/25/44		75,298		58,910
Series 2005-8, Class B, 3 mo. USD LIBOR + 0.310% 1.301% FRN 1/25/55		42,364		37,677
Series 2004-1 Class B, 3 mo. USD LIBOR + .500% 1.491% FRN 7/25/39		39,495		35,484
Series 2014-2, Class B, 1 mo. USD LIBOR + 1.500% 1.685% FRN 1/25/72		300,000		282,044
SMB Private Education Loan Trust Series 2019-B, Class A2B, 1 mo. USD LIBOR + 1.000% 1.185% FRN 6/15/37 (d)		250,000		242,171
Series 2017-A, Class B, 3.500% 6/17/41 (d)		100,000		99,459
SoFi Professional Loan Program LLC Series 2016-B, Class A1, 1 mo. USD LIBOR + 1.200% 1.385% FRN 6/25/33 (d)		13,426		13,359
Series 2019-C, Class BFX, 3.050% 11/16/48 (d)		123,000		121,110
South Carolina Student Loan Corp., Series 2010-1, Class A3, 3 mo. USD LIBOR + 1.050% 2.041% FRN 10/27/36		100,000		98,072
				3,883,180
WL Collateral CMO — 0.2%
Countrywide Home Loans, Inc. Series 2004-2, Class 1A1, 3.668% VRN 2/25/34 (f)		4,159		3,990
Series 2003-42, Class 1A1, 3.991% VRN 9/25/33 (f)		1,055		998
Deephaven Residential Mortgage Trust, Series 2018-1A, Class A1, 2.976% VRN 12/25/57 (d) (f)		30,351		30,647
GSR Mortgage Loan Trust, Series 2004-9, Class 2A1, 3.487% VRN 8/25/34 (f)		1,537		1,541
IndyMac Index Mortgage Loan Trust, Series 2004-AR4, Class 1A, 3.687% VRN 8/25/34 (f)		10,024		9,824
JP Morgan Mortgage Trust, Series 2017-1, Class A11, 3.500% VRN 1/25/47 (d) (f)		64,064		65,323
Merrill Lynch Mortgage Investors, Inc. Series 2004-A1, Class IA, 3.250% VRN 2/25/34 (f)		563		552
Series 2003-A4, Class IA, 4.234% VRN 7/25/33 (f)		608		577
PSMC Trust, Series 2018-2, Class A1, 3.500% VRN 6/25/48 (d) (f)		58,062		59,120
Structured Adjustable Rate Mortgage Loan Trust, Series 2004-2, Class 2A, 3.673% VRN 3/25/34 (f)		5,647		5,547

MassMutual Premier Balanced Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Washington Mutual Mortgage Pass-Through Certificates, Series 2004-AR2, Class A, 12 mo. MTA + 1.400% 2.904% FRN 4/25/44	$	13,153	$	12,524
Wells Fargo Mortgage Backed Securities Trust, Series 2019-1, Class A1, 4.000% VRN 11/25/48 (d) (f)		47,354		48,363
				239,006
TOTAL NON-U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $14,306,158)				13,803,577
Sovereign Debt Obligations — 0.2%
Colombia Government International Bond 6.125% 1/18/41		100,000		124,850
Mexico Government International Bond 4.750% 3/08/44		163,000		172,780
				297,630
TOTAL SOVEREIGN DEBT OBLIGATIONS (Cost $262,980)				297,630
U.S. Government Agency Obligations and Instrumentalities — 8.9%
Collateralized Mortgage Obligations — 0.1%
Federal Home Loan Mortgage Corp. Series 2617, Class Z, 5.500% 5/15/33		33,830		39,196
Series 2693, Class Z, 5.500% 10/15/33		62,714		70,715
				109,911
Pass-Through Securities — 8.5%
Federal Home Loan Mortgage Corp. Pool #QA8791 3.500% 4/01/50		49,862		53,499
Pool #RA2483 3.500% 6/01/50		474,512		504,525
Pool #G05253 5.000% 2/01/39		5,337		6,149
Pool #G00729 8.000% 6/01/27		7,469		8,487
Federal National Mortgage Association Pool #MA3984 2.500% 4/01/35		438,834		459,567
Pool #MA4013 2.500% 5/01/35		276,111		289,157
Pool #MA4053 2.500% 6/01/35		174,077		182,302
Pool #MA3029 3.000% 6/01/32		128,181		135,062
Pool #MA3090 3.000% 8/01/32		59,142		62,279
Pool #AS1304 3.500% 12/01/28		27,247		29,055
Pool #AV2325 3.500% 12/01/28		13,513		14,409
Pool #BF0196 3.500% 2/01/41		32,546		35,197
Pool #MA1356 3.500% 2/01/43		229,549		248,104
Pool #FM1970 3.500% 11/01/49		87,157		94,202
Pool #CA5308 3.500% 3/01/50		314,678		337,237
Pool #CA6096 3.500% 6/01/50		424,457		451,835
Pool #725692 1 year CMT + 2.137% 3.957% FRN 10/01/33		4,873		5,130
Pool #888586 1 year CMT + 2.195% 3.973% FRN 10/01/34		11,082		11,667
Pool #BJ0686 4.000% 4/01/48		71,859		76,391
Pool #CA1951 4.000% 7/01/48		75,061		79,749
Pool #CA2039 4.000% 7/01/48		114,616		121,676
Pool #CA1909 4.500% 6/01/48		173,455		186,396
Pool #AD6437 5.000% 6/01/40		11,194		12,783
Pool #AD6996 5.000% 7/01/40		74,879		85,507
Pool #AL8173 5.000% 2/01/44		28,106		31,893
Pool #564594 7.000% 1/01/31		5,715		6,535
Pool #253795 7.000% 5/01/31		2,664		3,086
Pool #507061 7.500% 10/01/29		468		540
Pool #527761 7.500% 2/01/30		548		575
Pool #253183 7.500% 4/01/30		1,147		1,336
Pool #253265 7.500% 5/01/30		637		742
Pool #535248 8.000% 4/01/30		68		79
Pool #539460 8.000% 5/01/30		973		1,143
Pool #190317 8.000% 8/01/31		921		1,076
Government National Mortgage Association I  Pool #352049 7.000% 10/15/23		285		303
Government National Mortgage Association II Pool# MA6656 3.000% 5/20/50		449,060		475,667
Pool# MA6710 3.000% 6/20/50		400,000		423,826
Government National Mortgage Association II TBA  Pool #471 3.500% 6/01/49 (e)		3,750,000		3,957,129
Uniform Mortgage Backed Securities TBA Pool #1127 3.500% 4/01/49 (e)		2,075,000		2,182,316
Pool #15801 4.500% 9/01/48 (e)		225,000		241,769
				10,818,380
Whole Loans — 0.3%
Federal Home Loan Mortgage Corp. Structured Agency Credit Risk Debt Notes Series 2020-DNA3, Class M1, 1 mo. USD LIBOR + 1.500% 1.000% FRN 6/25/50 (d) (e)		120,000		120,000
Series 2019-DNA3, Class M2, 1 mo. USD LIBOR + 2.050% 2.235% FRN 7/25/49 (d)		102,593		100,220
Federal National Mortgage Association Connecticut Avenue Securities Trust, Series 2019-R01, Class 2M2, 1 mo. USD LIBOR + 2.450% 2.635% FRN 7/25/31 (d)		150,646		147,007
				367,227
TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS AND INSTRUMENTALITIES (Cost $11,263,187)				11,295,518
U.S. Treasury Obligations — 1.6%
U.S. Treasury Bonds & Notes — 1.6%
U.S. Treasury Bond 2.250% 8/15/49 (g)		870,000		1,046,177
3.500% 2/15/39		100,000		141,459
U.S. Treasury Note 0.125% 5/15/23		300,000		299,587
0.375% 4/30/25		500,000		502,186
				1,989,409
TOTAL U.S. TREASURY OBLIGATIONS (Cost $1,934,135)				1,989,409
TOTAL BONDS & NOTES (Cost $44,340,871)				44,885,311
TOTAL PURCHASED OPTIONS (#) — 0.1% (Cost $130,531)				83,816

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Rights — 0.0%
Consumer, Non-cyclical — 0.0%
Pharmaceuticals — 0.0%
Bristol-Myers Squibb Co., Expires 3/31/21 (a)		3,598	$	12,881
TOTAL RIGHTS (Cost $7,664)				12,881
Mutual Funds — 8.0%
Diversified Financial Services — 8.0%
iShares China Large-Cap ETF (b)		2,800		111,160
iShares MSCI Australia ETF		7,000		134,890
iShares MSCI EAFE ETF		43,430		2,643,584
iShares MSCI France ETF (b)		8,500		233,070
iShares MSCI Germany ETF (b)		7,200		195,192
iShares MSCI India ETF (b)		13,000		377,260
iShares MSCI Italy ETF (b)		2,900		69,832
iShares MSCI Japan ETF		10,300		565,676
iShares MSCI Singapore ETF (b)		1,150		21,585
iShares MSCI South Korea ETF		1,800		102,834
iShares MSCI Spain ETF		3,400		76,364
iShares MSCI Sweden ETF (b)		2,100		65,247
iShares MSCI Switzerland Capped ETF		6,400		249,344
iShares MSCI Turkey Investable Market ETF (b)		1,700		39,474
iShares MSCI United Kingdom ETF		10,500		270,480
State Street Navigator Securities Lending Prime Portfolio (h)		666,559		666,559
Vanguard FTSE Developed Markets ETF (b)		74,840		2,903,044
Vanguard FTSE Emerging Markets ETF		35,200		1,394,272
TOTAL MUTUAL FUNDS (Cost $9,941,783)				10,119,867
TOTAL LONG-TERM INVESTMENTS (Cost $117,117,525)				125,158,615
	Principal Amount
Short-Term Investments — 5.4%
Commercial Paper — 3.9%
Bayer Corp.
2.553% 7/15/20 (d)	$	1,000,000		999,888
Carnival Corp.
1.746% 11/25/20 (d)		1,000,000		972,484
FMC Tech, Inc.
1.269% 7/13/20 (d)		1,000,000		999,812
Lloyds Bank PLC
0.183% 7/30/20		1,000,000		999,792
Suncor Energy, Inc.
1.527% 8/13/20 (d)		1,000,000		999,517
				4,971,493
Repurchase Agreement — 1.5%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (i)		1,928,101		1,928,101
TOTAL SHORT-TERM INVESTMENTS (Cost $6,917,834)				6,899,594
TOTAL INVESTMENTS — 104.1% (Cost $124,035,359) (j)				132,058,209
Other Assets/(Liabilities) — (4.1)%				(5,199,859	)
NET ASSETS — 100.0%			$	126,858,350

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

Abbreviation Legend
ABS	Asset-Backed Security
ARS	Auction Rate Security
BAB	Build America Bonds
CLO	Collateralized Loan Obligation
CMO	Collateralized Mortgage Obligation
CMT	Constant Maturity Treasury Index
DAC	Designated Activity Company
ETF	Exchange-Traded Fund
FRN	Floating Rate Note
LIBOR	London Inter-Bank Offered Rate
MBS	Mortgage-Backed Security
MTA	Monthly Treasury Average Index
SOFR	Secured Overnight Financing Rate
STEP	Step Up Bond
TBA	To Be Announced
VRN	Variable Rate Note
WL	Whole Loan

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 June 30, 2020, was $4,140,806 or 3.26% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $3,618,393 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Security is perpetual and has no stated maturity date.
(d)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $18,067,509 or 14.24% of net assets.
(e)	A portion of this security is purchased on a when-issued, delayed-delivery or forward commitment basis.
(f)	Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions.  These securities do not indicate a reference rate and spread in their description above. The rates shown are the current interest rates at June 30, 2020.
(g)	A portion of this security is pledged/held as collateral for open derivatives.

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

Notes to Portfolio of Investments  (Continued)

(h)	Represents investment of security lending cash collateral. (Note 2).
(i)	Maturity value of $1,928,101. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 2/29/24, and an aggregate market value, including accrued interest, of $1,966,724.
(j)	See Note 3 for aggregate cost for federal tax purposes.

(#) Interest Rate Swaptions Purchased 

			Paid by Fund		Received by Fund
Description	Counterparty	Expiration Date	Rate	Frequency	Rate	Frequency	Notional Amount		Value		Premium Paid (Received)		Unrealized Appreciation/ (Depreciation)
Call
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	3-Month USD  LIBOR  BBA	Quarterly	2.44%	Semi- Annually	USD	138,250	$	21,194	$	6,912	$	14,282
Put
10-Year Interest Rate Swap, 12/15/42	Barclays Bank PLC	12/13/32	2.94%	Semi- Annually	3-Month USD LIBOR BBA	Quarterly	USD	1,620,000	$	41,796	$	80,988	$	(39,192	)
10-Year Interest Rate Swap, 2/02/43	Credit Suisse International	1/31/33	3.11%	Semi- Annually	3-Month USD LIBOR BBA	Quarterly	USD	890,000		20,826		42,631		(21,805	)
										62,622		123,619		(60,997	)
									$	83,816	$	130,531	$	(46,715	)

MassMutual Premier Balanced Fund —  Portfolio of Investments (Continued)

Futures contracts

	Expiration Date	Number of Contracts		Notional Amount			Value/ Net Unrealized Appreciation/ (Depreciation)
Long
E-MINI MSCI EAFE INDEX	9/18/20		17	$	1,508,973		$	2,667
U.S. Treasury Long Bond	9/21/20		3		536,070			(382	)
U.S. Treasury Ultra Bond	9/21/20		11		2,408,779			(9,060	)
U.S. Treasury Note 2 Year	9/30/20		35		7,728,579			405
U.S. Treasury Note 5 Year	9/30/20		14		1,756,880			3,511
							$	(2,859	)
Short
U.S. Treasury Ultra 10 Year	9/21/20		3	$	(470,850	)	$	(1,603	)

Centrally Cleared Credit Default Swaps - Buy Protection

Reference Obligation/Index	Rate Paid by Fund	Payment Frequency	Termination Date	Notional Amount		Value			Upfront Premium Paid/ (Received)		Unrealized Appreciation (Depreciation)
CDX.NA.IG Series 34†	1.000%	Quarterly	6/20/25	USD	200,000	$	(2,338	)	$	710	$	(3,048	)
CDX.NA.IG Series 34†	1.000%	Quarterly	6/20/25	USD	200,000		(2,380	)		870		(3,250	)
						$	(4,718	)	$	1,580	$	(6,298	)

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

Currency Legend

USD U.S. Dollar

MassMutual Premier Disciplined Value Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 98.4%
Common Stock — 98.4%
Basic Materials — 2.8%
Chemicals — 1.7%
Air Products & Chemicals, Inc.		100	$	24,146
Albemarle Corp.		10		772
Cabot Corp.		200		7,410
Celanese Corp.		1,810		156,276
CF Industries Holdings, Inc.		1,700		47,838
The Chemours Co.		1,300		19,955
Dow, Inc. (a)		2,603		106,098
DuPont de Nemours, Inc.		903		47,976
Eastman Chemical Co.		1,360		94,711
Ecolab, Inc.		100		19,895
Element Solutions, Inc. (a)		1,800		19,530
FMC Corp.		500		49,810
Huntsman Corp.		2,900		52,113
Linde PLC		340		72,117
LyondellBasell Industries NV Class A		4,300		282,596
The Mosaic Co.		400		5,004
NewMarket Corp.		250		100,120
Olin Corp.		3,000		34,470
PPG Industries, Inc.		1,870		198,332
RPM International, Inc.		100		7,506
Valvoline, Inc.		2,100		40,593
Westlake Chemical Corp.		260		13,949
				1,401,217
Forest Products & Paper — 0.3%
International Paper Co.		6,600		232,386
Iron & Steel — 0.2%
Nucor Corp.		800		33,128
Reliance Steel & Aluminum Co.		880		83,538
Steel Dynamics, Inc.		3,100		80,879
				197,545
Mining — 0.6%
Freeport-McMoRan, Inc.		1,231		14,243
Newmont Corp.		6,700		413,658
Southern Copper Corp.		800		31,816
				459,717
				2,290,865
Communications — 11.3%
Advertising — 0.3%
The Interpublic Group of Cos., Inc.		5,200		89,232
Omnicom Group, Inc.		2,400		131,040
				220,272
Internet — 2.0%
Alphabet, Inc. Class A (a)		570		808,288
Alphabet, Inc. Class C (a)		370		523,036
E*TRADE Financial Corp.		1,100		54,703
eBay, Inc.		1,400		73,430
F5 Networks, Inc. (a)		210		29,291
Lyft, Inc. Class A (a)		100		3,301
TD Ameritrade Holding Corp.		1,500		54,570
TripAdvisor, Inc.		900		17,109
Twitter, Inc. (a)		400		11,916
Uber Technologies, Inc. (a)		300		9,324
VeriSign, Inc. (a)		400		82,732
				1,667,700
Media — 2.8%
Charter Communications, Inc. Class A (a)		90		45,903
Comcast Corp. Class A		28,600		1,114,828
Discovery, Inc. Class A (a) (b)		1,800		37,980
Discovery, Inc. Class C (a)		4,928		94,913
DISH Network Corp. Class A (a)		241		8,317
Fox Corp. Class A		4,133		110,847
Fox Corp. Class B (a)		1,433		38,462
John Wiley & Sons, Inc. Class A		700		27,300
Liberty Broadband Corp. Class C (a)		60		7,438
Liberty Media Corp-Liberty SiriusXM Class A (a)		1,300		44,876
Liberty Media Corp-Liberty SiriusXM Class C (a)		1,221		42,063
Madison Square Garden Entertainment Corp. (a)		10		750
The New York Times Co. Class A		100		4,203
Nexstar Media Group, Inc. Class A		430		35,987
ViacomCBS, Inc. Class A (b)		293		7,501
ViacomCBS, Inc. Class B		2,460		57,367
The Walt Disney Co.		5,498		613,082
				2,291,817
Telecommunications — 6.2%
Arista Networks, Inc. (a)		190		39,906
AT&T, Inc.		35,736		1,080,299
CenturyLink, Inc.		16,107		161,553
Ciena Corp. (a)		1,400		75,824
Cisco Systems, Inc.		35,000		1,632,400
EchoStar Corp. Class A (a)		600		16,776
Juniper Networks, Inc.		1,200		27,432
LogMeIn, Inc.		20		1,696
Motorola Solutions, Inc.		660		92,486
T-Mobile US, Inc. (a)		2,141		222,985
Telephone & Data Systems, Inc.		1,918		38,130
Ubiquiti, Inc.		350		61,096

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Verizon Communications, Inc.		30,300	$	1,670,439
				5,121,022
				9,300,811
Consumer, Cyclical — 9.6%
Airlines — 0.4%
Alaska Air Group, Inc.		500		18,130
American Airlines Group, Inc. (b)		400		5,228
Copa Holdings SA Class A		80		4,045
Delta Air Lines, Inc.		5,600		157,080
JetBlue Airways Corp. (a)		1,900		20,710
Southwest Airlines Co.		1,800		61,524
United Airlines Holdings, Inc. (a)		1,800		62,298
				329,015
Apparel — 0.3%
Capri Holdings Ltd. (a)		2,500		39,075
Columbia Sportswear Co.		100		8,058
Hanesbrands, Inc. (b)		7,000		79,030
PVH Corp.		400		19,220
Ralph Lauren Corp.		80		5,802
Skechers U.S.A., Inc. Class A (a)		100		3,138
Tapestry, Inc.		600		7,968
VF Corp.		700		42,658
				204,949
Auto Manufacturers — 0.9%
Cummins, Inc.		2,150		372,509
Ford Motor Co.		8,100		49,248
General Motors Co.		7,600		192,280
PACCAR, Inc.		2,000		149,700
				763,737
Auto Parts & Equipment — 0.4%
Allison Transmission Holdings, Inc.		2,100		77,238
Aptiv PLC		1,400		109,088
BorgWarner, Inc.		1,600		56,480
Lear Corp.		480		52,329
				295,135
Distribution & Wholesale — 0.2%
Fastenal Co.		1,400		59,976
HD Supply Holdings, Inc. (a)		1,900		65,835
IAA, Inc. (a)		200		7,714
LKQ Corp. (a)		1,400		36,680
				170,205
Entertainment — 0.0%
Madison Square Garden Sports Corp. (a)		10		1,469
Food Services — 0.0%
Aramark		1,400		31,598
Home Builders — 0.8%
D.R. Horton, Inc.		2,600		144,170
Lennar Corp. Class A		3,370		207,659
Lennar Corp. Class B		1,449		66,785
NVR, Inc. (a)		20		65,175
PulteGroup, Inc.		2,800		95,284
Toll Brothers, Inc.		1,200		39,108
				618,181
Home Furnishing — 0.2%
Dolby Laboratories, Inc. Class A		300		19,761
Tempur Sealy International, Inc. (a)		1,000		71,950
Whirlpool Corp.		550		71,241
				162,952
Housewares — 0.0%
Newell Brands, Inc.		1,700		26,996
The Scotts Miracle-Gro Co.		100		13,447
				40,443
Leisure Time — 0.1%
Carnival Corp. (b)		100		1,642
Harley-Davidson, Inc.		1,200		28,524
Norwegian Cruise Line Holdings Ltd. (a)		400		6,572
Polaris, Inc.		620		57,381
Royal Caribbean Cruises Ltd. (b)		360		18,108
				112,227
Lodging — 0.7%
Caesars Entertainment Corp. (a)		1,200		14,556
Extended Stay America, Inc.		300		3,357
Hilton Worldwide Holdings, Inc.		2,700		198,315
Las Vegas Sands Corp.		1,800		81,972
Marriott International, Inc. Class A		2,500		214,325
MGM Resorts International		100		1,680
Wyndham Destinations, Inc.		2,000		56,360
				570,565
Retail — 5.6%
Advance Auto Parts, Inc.		40		5,698
AutoNation, Inc. (a)		1,400		52,612
AutoZone, Inc. (a)		60		67,687
Best Buy Co., Inc.		2,500		218,175
Casey's General Stores, Inc.		50		7,476
Costco Wholesale Corp.		250		75,803
Darden Restaurants, Inc.		1,300		98,501
Dick's Sporting Goods, Inc.		800		33,008
Foot Locker, Inc.		1,700		49,572
The Gap, Inc.		200		2,524
Genuine Parts Co.		170		14,783
The Home Depot, Inc.		3,880		971,979
Kohl's Corp.		1,900		39,463
McDonald's Corp.		3,060		564,478
MSC Industrial Direct Co., Inc. Class A		600		43,686

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Nu Skin Enterprises, Inc. Class A		1,400	$	53,522
Penske Automotive Group, Inc.		200		7,742
Qurate Retail, Inc. (a)		6,600		62,700
Starbucks Corp.		2,200		161,898
Target Corp.		4,160		498,909
Tiffany & Co.		100		12,194
Walgreens Boots Alliance, Inc.		4,739		200,886
Walmart, Inc.		8,240		986,987
Williams-Sonoma, Inc.		300		24,603
Yum China Holdings, Inc.		2,800		134,596
Yum! Brands, Inc.		1,890		164,260
				4,553,742
				7,854,218
Consumer, Non-cyclical — 22.8%
Agriculture — 1.9%
Altria Group, Inc.		14,300		561,275
Bunge Ltd.		100		4,113
Philip Morris International, Inc.		13,960		978,038
				1,543,426
Beverages — 1.0%
Brown-Forman Corp. Class A		300		17,271
Brown-Forman Corp. Class B		100		6,366
The Coca-Cola Co.		9,700		433,396
Constellation Brands, Inc. Class A		210		36,739
Keurig Dr Pepper, Inc.		100		2,840
Molson Coors Beverage Co. Class B		360		12,370
PepsiCo, Inc.		2,650		350,489
				859,471
Biotechnology — 2.1%
Alexion Pharmaceuticals, Inc. (a)		1,870		209,889
Biogen, Inc. (a)		1,710		457,511
Corteva, Inc. (a)		3		80
Exelixis, Inc. (a)		2,100		49,854
Gilead Sciences, Inc.		12,400		954,056
United Therapeutics Corp. (a)		630		76,230
				1,747,620
Commercial Services — 1.2%
ADT, Inc. (b)		13,300		106,134
AMERCO		70		21,153
Automatic Data Processing, Inc.		550		81,890
CoreLogic, Inc.		400		26,888
Equifax, Inc.		10		1,719
Global Payments, Inc.		330		55,975
Graham Holdings Co. Class B		6		2,056
H&R Block, Inc. (b)		1,500		21,420
IHS Markit Ltd.		900		67,950
ManpowerGroup, Inc.		1,230		84,562
Nielsen Holdings PLC		600		8,916
Quanta Services, Inc.		600		23,538
Robert Half International, Inc.		1,500		79,245
S&P Global, Inc.		800		263,584
Sabre Corp.		2,000		16,120
United Rentals, Inc. (a)		700		104,328
				965,478
Cosmetics & Personal Care — 2.0%
Colgate-Palmolive Co.		10,000		732,600
Coty, Inc. Class A		200		894
The Procter & Gamble Co.		7,410		886,014
				1,619,508
Foods — 1.9%
Campbell Soup Co.		1,200		59,556
Conagra Brands, Inc.		2,764		97,210
Flowers Foods, Inc.		1,900		42,484
General Mills, Inc.		5,900		363,735
The Hershey Co.		390		50,552
Hormel Foods Corp.		900		43,443
Ingredion, Inc.		160		13,280
The J.M. Smucker Co.		290		30,685
Kellogg Co.		1,000		66,060
The Kraft Heinz Co.		3,100		98,859
The Kroger Co.		8,400		284,340
Lamb Weston Holdings, Inc.		1,133		72,433
McCormick & Co., Inc.		60		10,764
Mondelez International, Inc. Class A		2,250		115,042
Pilgrim's Pride Corp. (a)		1,500		25,335
Post Holdings, Inc. (a)		260		22,781
Sprouts Farmers Market, Inc. (a)		2,600		66,534
Sysco Corp.		1,000		54,660
Tyson Foods, Inc. Class A		800		47,768
US Foods Holding Corp. (a)		400		7,888
				1,573,409
Health Care – Products — 2.3%
Abbott Laboratories		3,000		274,290
Baxter International, Inc.		1,500		129,150
Boston Scientific Corp. (a)		800		28,088
The Cooper Cos., Inc.		30		8,509
Danaher Corp.		1,360		240,489
Henry Schein, Inc. (a)		300		17,517
Hill-Rom Holdings, Inc.		560		61,477
Medtronic PLC		5,569		510,677
QIAGEN NV (a)		800		34,248
Steris PLC		90		13,810
Stryker Corp.		950		171,180
Thermo Fisher Scientific, Inc.		750		271,755
Zimmer Biomet Holdings, Inc.		780		93,101
				1,854,291
Health Care – Services — 2.1%
Anthem, Inc.		1,310		344,504
Centene Corp. (a)		1,256		79,819
Cigna Corp. (a)		1,863		349,592
DaVita, Inc. (a)		900		71,226
Encompass Health Corp.		100		6,193

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
HCA Healthcare, Inc.		770	$	74,736
Humana, Inc.		840		325,710
IQVIA Holdings, Inc. (a)		120		17,026
Laboratory Corp. of America Holdings (a)		320		53,155
Molina Healthcare, Inc. (a)		330		58,733
PPD, Inc. (a)		800		21,440
Quest Diagnostics, Inc.		590		67,236
UnitedHealth Group, Inc.		760		224,162
Universal Health Services, Inc. Class B		690		64,094
				1,757,626
Household Products & Wares — 0.9%
Avery Dennison Corp.		470		53,622
The Clorox Co.		350		76,780
Kimberly-Clark Corp.		3,770		532,889
Reynolds Consumer Products, Inc.		1,200		41,688
Spectrum Brands Holdings, Inc.		100		4,590
				709,569
Pharmaceuticals — 7.4%
AbbVie, Inc.		1,313		128,910
AmerisourceBergen Corp.		550		55,424
Becton Dickinson and Co.		1,150		275,161
Bristol-Myers Squibb Co.		14,300		840,840
CVS Health Corp.		10,789		700,961
Herbalife Nutrition Ltd. (a)		500		22,490
Horizon Therapeutics PLC (a)		100		5,558
Jazz Pharmaceuticals PLC (a)		400		44,136
Johnson & Johnson		14,750		2,074,292
McKesson Corp.		430		65,971
Merck & Co., Inc.		2,428		187,757
Mylan NV (a)		5,500		88,440
Perrigo Co. PLC		800		44,216
Pfizer, Inc.		44,115		1,442,560
Zoetis, Inc.		420		57,557
				6,034,273
				18,664,671
Energy — 4.2%
Oil & Gas — 3.7%
Apache Corp.		128		1,728
Cabot Oil & Gas Corp.		4,500		77,310
Chevron Corp.		10,895		972,161
Cimarex Energy Co.		500		13,745
Concho Resources, Inc.		200		10,300
ConocoPhillips		9,148		384,399
Devon Energy Corp.		50		567
Diamondback Energy, Inc.		670		28,019
EOG Resources, Inc.		3,690		186,936
EQT Corp.		400		4,760
Exxon Mobil Corp.		18,390		822,401
Hess Corp.		200		10,362
HollyFrontier Corp.		2,800		81,760
Marathon Oil Corp.		2,900		17,748
Marathon Petroleum Corp.		1,277		47,734
Murphy Oil Corp. (b)		1,700		23,460
Noble Energy, Inc.		480		4,301
Occidental Petroleum Corp.		1,288		23,570
Parsley Energy, Inc. Class A		400		4,272
Phillips 66		3,260		234,394
Pioneer Natural Resources Co.		400		39,080
Valero Energy Corp.		1,134		66,702
WPX Energy, Inc. (a)		66		421
				3,056,130
Oil & Gas Services — 0.2%
Baker Hughes Co.		3		46
Halliburton Co.		3,100		40,238
Schlumberger Ltd.		3,840		70,618
				110,902
Pipelines — 0.3%
Kinder Morgan, Inc.		4,400		66,748
ONEOK, Inc.		800		26,576
Targa Resources Corp.		100		2,007
The Williams Cos., Inc.		8,700		165,474
				260,805
				3,427,837
Financial — 21.6%
Banks — 8.4%
Associated Banc-Corp.		1,350		18,468
Bank of America Corp.		46,473		1,103,734
Bank of Hawaii Corp.		820		50,356
The Bank of New York Mellon Corp.		10,150		392,297
Bank OZK		300		7,041
BOK Financial Corp.		100		5,644
Citigroup, Inc.		11,671		596,388
Citizens Financial Group, Inc.		1,900		47,956
Comerica, Inc.		1,500		57,150
Commerce Bancshares, Inc.		334		19,863
Cullen/Frost Bankers, Inc.		70		5,230
East West Bancorp, Inc.		1,600		57,984
F.N.B. Corp.		2,900		21,750
Fifth Third Bancorp		2,560		49,357
First Horizon National Corp. (b)		3,016		30,039
The Goldman Sachs Group, Inc.		2,390		472,312
Huntington Bancshares, Inc.		1,771		16,001
JPMorgan Chase & Co.		18,127		1,705,026
KeyCorp		5,896		71,813
M&T Bank Corp.		855		88,894
Morgan Stanley		7,800		376,740
Northern Trust Corp.		1,030		81,720
PacWest Bancorp		2,400		47,304
The PNC Financial Services Group, Inc.		3,096		325,730
Popular, Inc.		900		33,453
Prosperity Bancshares, Inc.		100		5,938
Regions Financial Corp.		4,160		46,259
State Street Corp.		4,800		305,040
SVB Financial Group (a)		220		47,417

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Synovus Financial Corp.		1,271	$	26,094
TCF Financial Corp.		9		265
Truist Financial Corp.		1,900		71,345
Umpqua Holdings Corp.		3,300		35,112
US Bancorp		7,890		290,510
Webster Financial Corp.		600		17,166
Wells Fargo & Co.		14,153		362,317
Western Alliance Bancorp		1,000		37,870
Zions Bancorp NA		350		11,900
				6,939,483
Diversified Financial Services — 3.5%
Alliance Data Systems Corp.		1,880		84,826
Ally Financial, Inc.		2,600		51,558
American Express Co.		1,790		170,408
Ameriprise Financial, Inc.		1,880		282,075
BlackRock, Inc.		830		451,595
Capital One Financial Corp.		950		59,460
Cboe Global Markets, Inc.		400		37,312
The Charles Schwab Corp.		6,800		229,432
CME Group, Inc.		1,340		217,803
Credit Acceptance Corp. (a) (b)		10		4,190
Discover Financial Services		2,400		120,216
Eaton Vance Corp.		1,400		54,040
Evercore, Inc. Class A		200		11,784
Franklin Resources, Inc.		2,600		54,522
Intercontinental Exchange, Inc.		1,935		177,246
Invesco Ltd.		7,700		82,852
Lazard Ltd. Class A		2,000		57,260
Legg Mason, Inc.		600		29,850
LPL Financial Holdings, Inc.		500		39,200
Nasdaq, Inc.		540		64,514
OneMain Holdings, Inc.		1,000		24,540
Raymond James Financial, Inc.		200		13,766
Santander Consumer USA Holdings, Inc.		1,800		33,138
SEI Investments Co.		500		27,490
SLM Corp.		10,500		73,815
Synchrony Financial		5,600		124,096
T. Rowe Price Group, Inc.		1,180		145,730
Virtu Financial, Inc. Class A		2,100		49,560
The Western Union Co.		3,700		79,994
				2,852,272
Insurance — 5.6%
Aflac, Inc.		5,600		201,768
Alleghany Corp.		5		2,446
The Allstate Corp.		4,280		415,117
American Financial Group, Inc.		250		15,865
American International Group, Inc.		3,102		96,720
American National Insurance Co.		450		32,431
Arch Capital Group Ltd. (a)		1,700		48,705
Arthur J Gallagher & Co.		400		38,996
Assurant, Inc.		50		5,165
Assured Guaranty Ltd.		1,600		39,056
Athene Holding Ltd. Class A (a)		300		9,357
Axis Capital Holdings Ltd.		400		16,224
Berkshire Hathaway, Inc. Class B (a)		9,140		1,631,581
Brighthouse Financial, Inc. (a)		230		6,399
Chubb Ltd.		1,321		167,265
Cincinnati Financial Corp.		110		7,043
CNA Financial Corp.		400		12,860
Equitable Holdings, Inc.		5,400		104,166
Erie Indemnity Co. Class A		20		3,838
Everest Re Group Ltd.		10		2,062
Fidelity National Financial, Inc.		557		17,078
First American Financial Corp.		600		28,812
Globe Life, Inc.		600		44,538
The Hanover Insurance Group, Inc.		430		43,572
The Hartford Financial Services Group, Inc.		2,690		103,699
Kemper Corp.		400		29,008
Lincoln National Corp.		1,698		62,469
Loews Corp.		20		686
Markel Corp. (a)		5		4,616
Marsh & McLennan Cos., Inc.		500		53,685
Mercury General Corp.		90		3,668
MetLife, Inc.		7,840		286,317
MGIC Investment Corp.		5,600		45,864
Old Republic International Corp.		3,100		50,561
Primerica, Inc.		100		11,660
Principal Financial Group, Inc.		1,900		78,926
The Progressive Corp.		4,300		344,473
Prudential Financial, Inc.		2,860		174,174
Reinsurance Group of America, Inc.		300		23,532
RenaissanceRe Holdings Ltd.		10		1,710
The Travelers Cos., Inc.		1,569		178,944
Unum Group		2,600		43,134
Voya Financial, Inc.		400		18,660
W.R. Berkley Corp.		450		25,781
White Mountains Insurance Group Ltd.		3		2,664
Willis Towers Watson PLC		150		29,543
				4,564,838
Real Estate — 0.2%
CBRE Group, Inc. Class A (a)		1,900		85,918
Jones Lang LaSalle, Inc.		670		69,318
				155,236
Real Estate Investment Trusts (REITS) — 3.8%
AGNC Investment Corp.		600		7,740
Alexandria Real Estate Equities, Inc.		60		9,735
American Campus Communities, Inc.		100		3,496
Americold Realty Trust		2,200		79,860
Annaly Capital Management, Inc.		14,960		98,138
Apartment Investment and Management Co. Class A		899		33,838
Apple Hospitality REIT, Inc.		1,900		18,354
AvalonBay Communities, Inc.		324		50,103
Boston Properties, Inc.		940		84,957
Brixmor Property Group, Inc.		3,300		42,306
Brookfield Property REIT, Inc. Class A		3,300		32,868
Camden Property Trust		100		9,122
CoreSite Realty Corp.		380		46,003
CubeSmart		200		5,398
Digital Realty Trust, Inc.		130		18,474
Douglas Emmett, Inc.		1,200		36,792

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Duke Realty Corp.		1,100	$	38,929
EPR Properties		500		16,565
Equity Commonwealth		2,267		72,997
Equity LifeStyle Properties, Inc.		800		49,984
Equity Residential		3,100		182,342
Essex Property Trust, Inc.		503		115,273
Extra Space Storage, Inc.		370		34,177
Federal Realty Investment Trust		90		7,669
First Industrial Realty Trust, Inc.		1,000		38,440
Gaming and Leisure Properties, Inc.		2,153		74,494
Healthpeak Properties, Inc.		400		11,024
Highwoods Properties, Inc.		1,800		67,194
Host Hotels & Resorts, Inc.		5,003		53,982
Hudson Pacific Properties, Inc.		300		7,548
Invitation Homes, Inc.		1,300		35,789
Iron Mountain, Inc. (b)		1,500		39,150
JBG SMITH Properties		19		562
Kilroy Realty Corp.		100		5,870
Kimco Realty Corp.		4,900		62,916
Lamar Advertising Co. Class A		800		53,408
Life Storage, Inc.		400		37,980
Medical Properties Trust, Inc.		300		5,640
Mid-America Apartment Communities, Inc.		443		50,799
National Retail Properties, Inc.		300		10,644
New Residential Investment Corp.		5,800		43,094
Omega Healthcare Investors, Inc.		2,000		59,460
Outfront Media, Inc.		500		7,085
Paramount Group, Inc.		2,600		20,046
Park Hotels & Resorts, Inc.		2,900		28,681
Prologis, Inc.		4,207		392,639
Public Storage		510		97,864
Realty Income Corp.		900		53,550
SBA Communications Corp.		190		56,605
Simon Property Group, Inc.		1,430		97,784
SL Green Realty Corp.		1,280		63,091
Spirit Realty Capital, Inc.		240		8,366
Starwood Property Trust, Inc.		2,700		40,392
STORE Capital Corp.		500		11,905
Sun Communities, Inc.		100		13,568
UDR, Inc.		300		11,214
Ventas, Inc.		2,600		95,212
VEREIT, Inc.		900		5,787
VICI Properties, Inc.		2,300		46,437
Vornado Realty Trust		2,538		96,977
Weingarten Realty Investors		3,100		58,683
Welltower, Inc.		900		46,575
Weyerhaeuser Co.		3,200		71,872
WP Carey, Inc.		800		54,120
				3,131,567
Savings & Loans — 0.1%
New York Community Bancorp, Inc.		1,590		16,218
People's United Financial, Inc.		600		6,942
Sterling Bancorp		1,700		19,924
				43,084
				17,686,480
Industrial — 12.2%
Aerospace & Defense — 1.1%
The Boeing Co.		280		51,324
General Dynamics Corp.		1,440		215,222
Hexcel Corp.		400		18,088
Howmet Aerospace, Inc.		300		4,755
L3 Harris Technologies, Inc.		257		43,605
Northrop Grumman Corp.		130		39,967
Raytheon Technologies Corp.		6,168		380,072
Spirit AeroSystems Holdings, Inc. Class A		500		11,970
TransDigm Group, Inc.		330		145,877
				910,880
Building Materials — 0.5%
Carrier Global Corp.		6,390		141,986
Eagle Materials, Inc.		300		21,066
Fortune Brands Home & Security, Inc.		200		12,786
Johnson Controls International PLC		1,129		38,544
Lennox International, Inc.		30		6,990
Masco Corp.		3,500		175,735
MDU Resources Group, Inc.		2,400		53,232
Owens Corning		200		11,152
				461,491
Electrical Components & Equipment — 0.6%
Acuity Brands, Inc.		250		23,935
AMETEK, Inc.		300		26,811
Emerson Electric Co.		7,300		452,819
				503,565
Electronics — 2.0%
Agilent Technologies, Inc.		1,500		132,555
Allegion PLC		390		39,866
Amphenol Corp. Class A		600		57,486
Arrow Electronics, Inc. (a)		500		34,345
Avnet, Inc.		1,700		47,404
Coherent, Inc. (a)		10		1,310
FLIR Systems, Inc.		500		20,285
Fortive Corp.		300		20,298
Garmin Ltd.		500		48,750
Gentex Corp.		3,200		82,464
Honeywell International, Inc.		5,200		751,868
Hubbell, Inc.		260		32,594
Jabil, Inc.		2,100		67,368
Keysight Technologies, Inc. (a)		630		63,491
Mettler-Toledo International, Inc. (a)		20		16,111
National Instruments Corp.		1,500		58,065
nVent Electric PLC		1,519		28,451
PerkinElmer, Inc.		10		981
Roper Technologies, Inc.		50		19,413
Trimble, Inc. (a)		200		8,638
Waters Corp. (a)		620		111,848
				1,643,591

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Engineering & Construction — 0.1%
AECOM (a)		111	$	4,171
frontdoor, Inc. (a)		800		35,464
Jacobs Engineering Group, Inc.		100		8,480
				48,115
Environmental Controls — 0.5%
Clean Harbors, Inc. (a)		600		35,988
Pentair PLC		1,019		38,712
Republic Services, Inc.		690		56,615
Waste Management, Inc.		2,620		277,484
				408,799
Hand & Machine Tools — 0.2%
Lincoln Electric Holdings, Inc.		800		67,392
Regal Beloit Corp.		600		52,392
Snap-on, Inc.		360		49,864
Stanley Black & Decker, Inc.		5		697
				170,345
Machinery – Construction & Mining — 0.9%
BWX Technologies, Inc.		900		50,976
Caterpillar, Inc.		5,500		695,750
Oshkosh Corp.		300		21,486
				768,212
Machinery – Diversified — 1.0%
AGCO Corp.		566		31,390
Crane Co.		120		7,135
Curtiss-Wright Corp.		220		19,642
Deere & Co.		1,040		163,436
Dover Corp.		560		54,074
Flowserve Corp.		600		17,112
GrafTech International Ltd. (b)		8,900		71,022
IDEX Corp.		200		31,608
Ingersoll Rand, Inc. (a)		111		3,121
Otis Worldwide Corp.		4,195		238,528
Rockwell Automation, Inc.		840		178,920
				815,988
Metal Fabricate & Hardware — 0.1%
The Timken Co.		500		22,745
Valmont Industries, Inc.		350		39,767
				62,512
Miscellaneous - Manufacturing — 1.9%
3M Co.		2,660		414,933
A.O. Smith Corp.		1,200		56,544
AptarGroup, Inc.		20		2,240
Carlisle Cos., Inc.		360		43,081
Eaton Corp. PLC		2,372		207,502
General Electric Co.		4,990		34,082
Illinois Tool Works, Inc.		2,520		440,622
ITT, Inc.		400		23,496
Parker-Hannifin Corp.		980		179,605
Textron, Inc.		200		6,582
Trane Technologies PLC		1,240		110,335
Trinity Industries, Inc.		800		17,032
				1,536,054
Packaging & Containers — 0.8%
Amcor PLC		7,500		76,575
Ardagh Group SA		2,400		30,984
Berry Global Group, Inc. (a)		2,200		97,504
Crown Holdings, Inc. (a)		1,200		78,156
Graphic Packaging Holding Co.		4,300		60,157
Packaging Corp. of America		1,300		129,740
Silgan Holdings, Inc.		2,800		90,692
Sonoco Products Co.		800		41,832
WestRock Co.		1,440		40,694
				646,334
Shipbuilding — 0.1%
Huntington Ingalls Industries, Inc.		260		45,367
Transportation — 2.4%
C.H. Robinson Worldwide, Inc.		700		55,342
CSX Corp.		7,500		523,050
Expeditors International of Washington, Inc.		600		45,624
FedEx Corp.		490		68,708
J.B. Hunt Transport Services, Inc.		520		62,577
Kansas City Southern		560		83,602
Landstar System, Inc.		580		65,140
Norfolk Southern Corp.		1,000		175,570
Old Dominion Freight Line, Inc.		70		11,871
Ryder System, Inc.		790		29,633
Union Pacific Corp.		3,030		512,282
United Parcel Service, Inc. Class B		2,400		266,832
XPO Logistics, Inc. (a)		1,000		77,250
				1,977,481
				9,998,734
Technology — 9.0%
Computers — 2.7%
Amdocs Ltd.		1,000		60,880
CACI International, Inc. Class A (a)		210		45,545
Cognizant Technology Solutions Corp. Class A		4,600		261,372
Dell Technologies C (a)		793		43,567
DXC Technology Co.		2,700		44,550
Hewlett Packard Enterprise Co.		4,400		42,812
HP, Inc.		17,900		311,997
International Business Machines Corp.		9,500		1,147,315
Leidos Holdings, Inc.		850		79,620
NCR Corp. (a)		2,400		41,568
NetApp, Inc.		1,700		75,429
Science Applications International Corp.		600		46,608
Western Digital Corp.		36		1,589
				2,202,852

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Office & Business Equipment — 0.1%
Xerox Holdings Corp. (a)		3,014	$	46,084
Zebra Technologies Corp. Class A (a)		130		33,274
				79,358
Semiconductors — 4.5%
Analog Devices, Inc.		1,320		161,885
Broadcom, Inc.		130		41,029
Entegris, Inc.		100		5,905
Intel Corp.		31,700		1,896,611
Maxim Integrated Products, Inc.		2,500		151,525
Microchip Technology, Inc.		280		29,487
Micron Technology, Inc. (a)		6,700		345,184
ON Semiconductor Corp. (a)		300		5,946
Qorvo, Inc. (a)		650		71,845
Skyworks Solutions, Inc.		1,580		202,019
Texas Instruments, Inc.		6,050		768,168
				3,679,604
Software — 1.7%
Activision Blizzard, Inc.		3,400		258,060
Akamai Technologies, Inc. (a)		100		10,709
Aspen Technology, Inc. (a)		260		26,939
Autodesk, Inc. (a)		330		78,933
Citrix Systems, Inc.		1,230		181,929
Electronic Arts, Inc. (a)		3,180		419,919
Fidelity National Information Services, Inc.		300		40,227
Fiserv, Inc. (a)		200		19,524
Jack Henry & Associates, Inc.		270		49,688
Manhattan Associates, Inc. (a)		600		56,520
Nuance Communications, Inc. (a)		600		15,183
Oracle Corp.		3,200		176,864
SS&C Technologies Holdings, Inc		100		5,648
Take-Two Interactive Software, Inc. (a)		50		6,978
Teradata Corp. (a)		1,500		31,200
Zynga, Inc. Class A (a)		2,700		25,758
				1,404,079
				7,365,893
Utilities — 4.9%
Electric — 4.7%
AES Corp.		500		7,245
Alliant Energy Corp.		200		9,568
Ameren Corp.		660		46,438
American Electric Power Co., Inc.		1,030		82,029
Avangrid, Inc.		100		4,198
CenterPoint Energy, Inc.		2,000		37,340
CMS Energy Corp.		500		29,210
Consolidated Edison, Inc.		360		25,895
Dominion Energy, Inc.		1,085		88,080
DTE Energy Co.		120		12,900
Duke Energy Corp.		6,414		512,415
Edison International		780		42,362
Entergy Corp.		210		19,700
Evergy, Inc.		4,660		276,291
Eversource Energy		181		15,072
Exelon Corp.		4,675		169,656
FirstEnergy Corp.		6,127		237,605
Hawaiian Electric Industries, Inc.		600		21,636
IDACORP, Inc.		400		34,948
NextEra Energy, Inc.		1,432		343,923
NRG Energy, Inc.		6,700		218,152
OGE Energy Corp.		600		18,216
Pinnacle West Capital Corp.		560		41,042
PPL Corp.		7,400		191,216
Public Service Enterprise Group, Inc.		2,400		117,984
Sempra Energy		2,540		297,764
The Southern Co.		10,750		557,388
Vistra Energy Corp.		13,500		251,370
WEC Energy Group, Inc.		1,520		133,228
Xcel Energy, Inc.		320		20,000
				3,862,871
Gas — 0.2%
Atmos Energy Corp.		250		24,895
National Fuel Gas Co.		1,350		56,605
NiSource, Inc.		490		11,143
UGI Corp.		435		13,833
				106,476
Water — 0.0%
American Water Works Co., Inc.		100		12,866
Essential Utilities, Inc.		125		5,280
				18,146
				3,987,493
TOTAL COMMON STOCK (Cost $87,618,639)				80,577,002
TOTAL EQUITIES (Cost $87,618,639)				80,577,002
Rights — 0.0%
Communications — 0.0%
Telecommunications — 0.0%
T-Mobile US, Inc., Expires 7/27/20 (a)		1,521		256
TOTAL RIGHTS (Cost $563)				256

MassMutual Premier Disciplined Value Fund — Portfolio of Investments (Continued) 

	Number of Shares		Value
Mutual Funds — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Prime Portfolio (c)		152,947	$	152,947
TOTAL MUTUAL FUNDS (Cost $152,947)				152,947
TOTAL LONG-TERM INVESTMENTS (Cost $87,772,149)				80,730,205

	Principal Amount
Short-Term Investments — 1.6%
Repurchase Agreement — 1.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (d)	$	1,331,258		1,331,258
TOTAL SHORT-TERM INVESTMENTS (Cost $1,331,258)				1,331,258
TOTAL INVESTMENTS — 100.2% (Cost $89,103,407) (e)				82,061,463
Other Assets/(Liabilities) — (0.2)%				(170,788	)
NET ASSETS — 100.0%			$	81,890,675

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 June 30, 2020, was $449,107 or 0.55% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $303,356 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Represents investment of security lending cash collateral. (Note 2).
(d)	Maturity value of $1,331,258. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 2/29/24, and an aggregate market value, including accrued interest, of $1,357,974.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Main Street Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)
	Number of Shares		Value
Equities — 99.9%
Common Stock — 99.9%
Basic Materials — 1.1%
Chemicals — 1.1%
Ecolab, Inc.		3,478	$	691,948
Valvoline, Inc.		29,521		570,641
				1,262,589
Communications — 18.6%
Internet — 15.0%
Alphabet, Inc. Class A (a)		1,513		2,145,510
Amazon.com, Inc. (a)		2,802		7,730,214
Booking Holdings, Inc. (a)		1,115		1,775,459
Facebook, Inc. Class A (a)		15,831		3,594,745
Tencent Holdings Ltd. ADR		18,792		1,202,688
				16,448,616
Telecommunications — 3.6%
Motorola Solutions, Inc.		9,636		1,350,293
Verizon Communications, Inc.		47,828		2,636,757
				3,987,050
				20,435,666
Consumer, Cyclical — 5.6%
Auto Manufacturers — 0.5%
General Motors Co.		20,582		520,725
Entertainment — 0.5%
Live Nation Entertainment, Inc. (a)		4,464		197,889
Warner Music Group Corp. Class A (a)		13,254		390,993
				588,882
Home Builders — 0.6%
D.R. Horton, Inc.		12,163		674,438
Retail — 4.0%
The Home Depot, Inc.		10,559		2,645,135
O'Reilly Automotive, Inc. (a)		1,729		729,068
Target Corp.		8,727		1,046,629
				4,420,832
				6,204,877
Consumer, Non-cyclical — 25.8%
Beverages — 1.9%
Constellation Brands, Inc. Class A		6,320		1,105,684
PepsiCo, Inc.		7,883		1,042,606
				2,148,290
Biotechnology — 1.3%
Amgen, Inc.		3,086		727,864
Gilead Sciences, Inc.		9,019		693,922
				1,421,786
Commercial Services — 0.6%
S&P Global, Inc.		1,934		637,214
Cosmetics & Personal Care — 3.7%
The Procter & Gamble Co.		33,608		4,018,509
Foods — 0.8%
a2 Milk Co. Ltd. (a)		18,382		237,197
Mondelez International, Inc. Class A		12,551		641,732
				878,929
Health Care – Products — 3.9%
Alcon, Inc. (a) (b)		10,302		590,511
Avantor, Inc. (a)		20,148		342,516
Thermo Fisher Scientific, Inc.		5,627		2,038,887
Zimmer Biomet Holdings, Inc.		10,853		1,295,414
				4,267,328
Health Care – Services — 6.3%
HCA Healthcare, Inc.		14,698		1,426,588
Laboratory Corp. of America Holdings (a)		2,461		408,797
UnitedHealth Group, Inc.		17,333		5,112,368
				6,947,753
Household Products & Wares — 1.5%
Church & Dwight Co., Inc.		14,940		1,154,862
Reckitt Benckiser Group PLC		5,169		475,695
				1,630,557
Pharmaceuticals — 5.8%
AstraZeneca PLC Sponsored ADR		54,546		2,884,938
Merck & Co., Inc.		38,546		2,980,762
Neurocrine Biosciences, Inc. (a)		4,284		522,648
				6,388,348
				28,338,714
Energy — 2.7%
Oil & Gas — 1.4%
Suncor Energy, Inc.		66,959		1,128,928

MassMutual Premier Main Street Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Valero Energy Corp.		6,968	$	409,858
				1,538,786
Pipelines — 1.3%
Magellan Midstream Partners LP (c)		32,029		1,382,692
				2,921,478
Financial — 17.2%
Banks — 2.4%
JP Morgan Chase & Co.		28,324		2,664,155
Diversified Financial Services — 5.7%
Capital One Financial Corp.		28,050		1,755,649
Intercontinental Exchange, Inc.		24,737		2,265,909
Mastercard, Inc. Class A		7,611		2,250,573
				6,272,131
Insurance — 6.0%
Berkshire Hathaway, Inc. Class B (a)		15,318		2,734,416
Equitable Holdings, Inc.		94,268		1,818,430
The Progressive Corp.		24,753		1,982,963
				6,535,809
Real Estate Investment Trusts (REITS) — 3.1%
Prologis, Inc.		36,262		3,384,333
				18,856,428
Industrial — 8.5%
Aerospace & Defense — 3.2%
Lockheed Martin Corp.		9,679		3,532,060
Building Materials — 0.2%
Vulcan Materials Co.		1,781		206,329
Electronics — 1.0%
Honeywell International, Inc.		7,776		1,124,332
Environmental Controls — 1.3%
Waste Connections, Inc.		15,114		1,417,542
Transportation — 2.8%
C.H. Robinson Worldwide, Inc.		7,932		627,104
Union Pacific Corp.		8,397		1,419,681
United Parcel Service, Inc. Class B		9,639		1,071,664
				3,118,449
				9,398,712
Technology — 19.0%
Computers — 2.3%
Accenture PLC Class A		7,831		1,681,473
Amdocs Ltd.		14,023		853,720
				2,535,193
Semiconductors — 6.2%
Applied Materials, Inc.		42,814		2,588,106
QUALCOMM, Inc.		24,949		2,275,598
Texas Instruments, Inc.		14,970		1,900,741
				6,764,445
Software — 10.5%
Adobe, Inc. (a)		1,611		701,285
Microsoft Corp.		53,214		10,829,581
				11,530,866
				20,830,504
Utilities — 1.4%
Electric — 1.3%
Duke Energy Corp.		17,439		1,393,202
Gas — 0.1%
UGI Corp.		3,223		102,491
				1,495,693
TOTAL COMMON STOCK                                                                                                      (Cost $94,974,593)				109,744,661
TOTAL EQUITIES (Cost $94,974,593)				109,744,661
TOTAL LONG-TERM INVESTMENTS (Cost $94,974,593)				109,744,661

	Principal Amount
Short-Term Investments — 0.2%
Repurchase Agreement — 0.2%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (d)	$	243,729		243,729
TOTAL SHORT-TERM INVESTMENTS (Cost $243,729)				243,729
TOTAL INVESTMENTS — 100.1% (Cost $95,218,322) (e)				109,988,390
Other Assets/(Liabilities) — (0.1)%				(117,357	)
NET ASSETS — 100.0%			$	109,871,033

Abbreviation Legend 

ADR American Depositary Receipt

MassMutual Premier Main Street Fund —  Portfolio of Investments (Continued)

Notes to Portfolio of Investments 

Percentages are stated as a percent of net assets. 

(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2020, was $584,549 or 0.53% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $598,524 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(c)	Security is a Master Limited Partnership.
(d)	Maturity value of $243,729. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 2/29/24, and an aggregate market value, including accrued interest, of $248,654.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 99.4%
Common Stock — 99.4%
Basic Materials — 0.5%
Chemicals — 0.5%
Air Products & Chemicals, Inc.		20	$	4,829
Apollo Global Management, Inc.		106		5,291
Ecolab, Inc.		40		7,958
FMC Corp.		215		21,418
NewMarket Corp.		508		203,444
RPM International, Inc.		301		22,593
The Sherwin-Williams Co.		1,456		841,350
W.R. Grace & Co.		102		5,183
				1,112,066
Mining — 0.0%
Royal Gold, Inc.		193		23,994
				1,136,060
Communications — 20.0%
Advertising — 0.0%
The Trade Desk, Inc. Class A (a)		52		21,138
Internet — 19.2%
Alphabet, Inc. Class A (a)		3,679		5,217,006
Alphabet, Inc. Class C (a)		4,549		6,430,512
Amazon.com, Inc. (a)		6,461		17,824,736
Anaplan, Inc. (a)		118		5,347
Booking Holdings, Inc. (a)		875		1,393,298
CDW Corp.		3,429		398,381
eBay, Inc.		20,132		1,055,923
Etsy, Inc. (a)		1,118		118,765
Expedia Group, Inc.		10		822
Facebook, Inc. Class A (a)		45,018		10,222,237
FireEye, Inc. (a)		108		1,315
GoDaddy, Inc. Class A (a)		5,156		378,089
GrubHub, Inc. (a)		17		1,195
IAC/InterActiveCorp (a)		82		26,519
Match Group, Inc. (a) (b)		1,948		208,533
Netflix, Inc. (a)		3,749		1,705,945
NortonLifeLock, Inc.		19,831		393,249
Okta, Inc. (a)		76		15,217
Palo Alto Networks, Inc. (a)		1,547		355,300
Pinterest, Inc. (a)		287		6,363
Proofpoint, Inc. (a)		676		75,117
Roku, Inc. (a)		82		9,555
Spotify Technology SA (a)		77		19,881
Uber Technologies, Inc. (a)		1,789		55,602
VeriSign, Inc. (a)		1,882		389,254
Wayfair, Inc. Class A (a)		102		20,156
Zendesk, Inc. (a)		81		7,171
Zillow Group, Inc. Class A  (a)		14		805
Zillow Group, Inc. Class C  (a)		31		1,786
				46,338,079
Media — 0.6%
Altice USA, Inc. Class A (a)		6,667		150,274
Cable One, Inc.		96		170,386
Charter Communications, Inc. Class A (a)		1,478		753,839
FactSet Research Systems, Inc.		135		44,344
Liberty Media Corp-Liberty SiriusXM Class A (a)		2,133		73,631
Liberty Media Corp-Liberty SiriusXM Class C (a)		2,251		77,547
Nexstar Media Group, Inc. Class A		522		43,686
Sirius XM Holdings, Inc.		17,138		100,600
World Wrestling Entertainment, Inc. Class A		753		32,718
				1,447,025
Telecommunications — 0.2%
Arista Networks, Inc. (a)		959		201,419
CommScope Holding Co., Inc. (a)		44		367
LogMeIn, Inc.		303		25,685
Motorola Solutions, Inc.		265		37,134
PagerDuty, Inc. (a)		49		1,402
Switch, Inc. Class A		59		1,051
Ubiquiti, Inc.		1,258		219,597
				486,655
				48,292,897
Consumer, Cyclical — 7.6%
Apparel — 0.6%
NIKE, Inc. Class B		14,793		1,450,454
VF Corp.		62		3,778
				1,454,232
Auto Manufacturers — 0.7%
Tesla, Inc. (a)		1,533		1,655,349
Auto Parts & Equipment — 0.1%
Allison Transmission Holdings, Inc.		6,513		239,548
Distribution & Wholesale — 0.4%
Copart, Inc. (a)		2,074		172,702
Fastenal Co.		7,715		330,511
IAA, Inc. (a)		100		3,857
Pool Corp.		1,071		291,173
W.W. Grainger, Inc.		558		175,301
				973,544
Entertainment — 0.0%
Live Nation Entertainment, Inc. (a)		137		6,073

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Vail Resorts, Inc.		10	$	1,822
				7,895
Home Builders — 0.0%
NVR, Inc. (a)		10		32,587
Home Furnishing — 0.1%
Dolby Laboratories, Inc. Class A		29		1,910
Tempur Sealy International, Inc. (a)		4,738		340,899
				342,809
Housewares — 0.1%
The Scotts Miracle-Gro Co.		807		108,517
The Toro Co.		100		6,634
				115,151
Leisure Time — 0.0%
Peloton Interactive, Inc. Class A (a)		14		809
Planet Fitness, Inc. Class A (a)		221		13,386
Polaris, Inc.		168		15,548
Virgin Galactic Holdings, Inc. (a)		34		556
				30,299
Lodging — 0.1%
Las Vegas Sands Corp.		3,674		167,314
Wynn Resorts Ltd.		20		1,490
				168,804
Retail — 5.5%
AutoZone, Inc. (a)		287		323,770
Best Buy Co., Inc.		2,849		248,632
Burlington Stores, Inc. (a)		284		55,928
CarMax, Inc. (a)		29		2,597
Carvana Co. (a)		71		8,534
Chipotle Mexican Grill, Inc. (a)		257		270,457
Costco Wholesale Corp.		2,565		777,734
Dollar General Corp.		6,616		1,260,414
Dollar Tree, Inc. (a)		882		81,744
Domino's Pizza, Inc.		1,803		666,100
Dunkin' Brands Group, Inc.		1,635		106,651
Five Below, Inc. (a)		53		5,666
Floor & Decor Holdings, Inc. Class A (a)		70		4,035
The Home Depot, Inc.		14,195		3,555,989
Lowe's Cos., Inc.		25,423		3,435,156
Lululemon Athletica, Inc. (a)		563		175,662
McDonald's Corp.		1,800		332,046
O'Reilly Automotive, Inc. (a)		1,861		784,728
Ollie's Bargain Outlet Holdings, Inc. (a)		127		12,402
Ross Stores, Inc.		532		45,348
Starbucks Corp.		3,534		260,067
The TJX Cos., Inc.		2,029		102,586
Tractor Supply Co.		2,975		392,075
Ulta Beauty, Inc. (a)		355		72,214
The Wendy's Co.		4,565		99,426
Williams-Sonoma, Inc.		1,701		139,499
Yum China Holdings, Inc.		1,483		71,288
Yum! Brands, Inc.		576		50,060
				13,340,808
Toys, Games & Hobbies — 0.0%
Mattel, Inc. (a)		3,074		29,726
				18,390,752
Consumer, Non-cyclical — 22.3%
Agriculture — 0.5%
Altria Group, Inc.		28,490		1,118,232
Beverages — 1.8%
The Boston Beer Co., Inc. Class A (a)		6		3,220
Brown-Forman Corp. Class A		469		27,000
Brown-Forman Corp. Class B		424		26,992
The Coca-Cola Co.		30,927		1,381,819
Monster Beverage Corp. (a)		6,441		446,490
PepsiCo, Inc.		17,547		2,320,766
				4,206,287
Biotechnology — 3.5%
ACADIA Pharmaceuticals, Inc. (a)		77		3,732
Acceleron Pharma, Inc. (a)		29		2,763
Alexion Pharmaceuticals, Inc. (a)		1,606		180,257
Alnylam Pharmaceuticals, Inc. (a)		75		11,108
Amgen, Inc.		16,880		3,981,317
Biogen, Inc. (a)		1,763		471,691
BioMarin Pharmaceutical, Inc. (a)		111		13,691
Bluebird Bio, Inc. (a)		54		3,296
Exact Sciences Corp. (a)		116		10,085
Exelixis, Inc. (a)		7,999		189,896
Guardant Health, Inc. (a)		48		3,894
Illumina, Inc. (a)		112		41,479
Immunomedics, Inc. (a)		243		8,612
Incyte Corp. (a)		124		12,892
Ionis Pharmaceuticals, Inc. (a)		280		16,509
Iovance Biotherapeutics, Inc. (a)		99		2,717
Livongo Health, Inc. (a)		36		2,707
Moderna, Inc. (a) (b)		195		12,521
Regeneron Pharmaceuticals, Inc. (a)		2,438		1,520,459
Sage Therapeutics, Inc. (a)		8		333
Seattle Genetics, Inc. (a)		317		53,865
Vertex Pharmaceuticals, Inc. (a)		6,802		1,974,689
				8,518,513
Commercial Services — 3.2%
2U, Inc. (a)		39		1,481
Automatic Data Processing, Inc.		6,350		945,452
Avalara, Inc. (a)		47		6,255
Booz Allen Hamilton Holding Corp.		4,423		344,065
Bright Horizons Family Solutions, Inc. (a)		35		4,102
Chegg, Inc. (a)		96		6,457
Cintas Corp.		1,540		410,194
CoreLogic, Inc.		2,962		199,106

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
CoStar Group, Inc. (a)		29	$	20,609
Equifax, Inc.		82		14,094
FleetCor Technologies, Inc. (a)		1,487		374,025
Gartner, Inc. (a)		1,359		164,888
H&R Block, Inc. (b)		2,654		37,899
IHS Markit Ltd.		6,256		472,328
MarketAxess Holdings, Inc.		244		122,225
Moody's Corp.		2,056		564,845
Morningstar, Inc.		101		14,238
Paylocity Holding Corp. (a)		29		4,231
PayPal Holdings, Inc. (a)		12,562		2,188,677
Quanta Services, Inc.		970		38,053
Rollins, Inc.		585		24,798
S&P Global, Inc.		2,839		935,394
Square, Inc. Class A (a)		922		96,755
StoneCo Ltd. Class A (a)		847		32,830
TransUnion		2,009		174,863
Verisk Analytics, Inc.		3,212		546,682
WEX, Inc. (a)		37		6,105
				7,750,651
Cosmetics & Personal Care — 0.7%
The Estee Lauder Cos., Inc. Class A		539		101,698
The Procter & Gamble Co.		13,868		1,658,197
				1,759,895
Foods — 0.5%
Beyond Meat, Inc. (a)		41		5,493
Campbell Soup Co.		3,390		168,245
Grocery Outlet Holding Corp. (a)		341		13,913
The Hershey Co.		2,176		282,053
Kellogg Co.		1,566		103,450
Lamb Weston Holdings, Inc.		1,414		90,397
McCormick & Co., Inc.		502		90,064
Pilgrim's Pride Corp. (a)		126		2,128
Sprouts Farmers Market, Inc. (a)		9,537		244,052
Sysco Corp.		5,021		274,448
				1,274,243
Health Care – Products — 2.2%
10X Genomics, Inc. Class A (a)		37		3,304
Abbott Laboratories		7,383		675,028
ABIOMED, Inc. (a)		40		9,662
Adaptive Biotechnologies Corp. (a)		179		8,660
Align Technology, Inc. (a)		248		68,061
Avantor, Inc. (a)		1,973		33,541
Baxter International, Inc.		2,858		246,074
Bio-Techne Corp.		25		6,602
Bruker Corp.		214		8,705
The Cooper Cos., Inc.		12		3,404
Edwards Lifesciences Corp. (a)		10,729		741,481
Haemonetics Corp. (a)		760		68,066
Hill-Rom Holdings, Inc.		913		100,229
Hologic, Inc. (a)		1,187		67,659
ICU Medical, Inc. (a)		52		9,584
IDEXX Laboratories, Inc. (a)		1,510		498,542
Insulet Corp. (a)		51		9,907
Intuitive Surgical, Inc. (a)		233		132,770
Masimo Corp. (a)		602		137,250
Novocure Ltd. (a)		84		4,981
Penumbra, Inc. (a)		24		4,292
Quidel Corp. (a)		763		170,714
Repligen Corp. (a)		473		58,468
ResMed, Inc.		2,231		428,352
Steris PLC		56		8,593
Stryker Corp.		1,628		293,349
Tandem Diabetes Care, Inc. (a)		44		4,352
Teleflex, Inc.		370		134,673
Thermo Fisher Scientific, Inc.		3,147		1,140,284
Varian Medical Systems, Inc. (a)		159		19,481
West Pharmaceutical Services, Inc.		1,101		250,114
				5,346,182
Health Care – Services — 2.5%
Amedisys, Inc. (a)		145		28,788
Anthem, Inc.		1,421		373,695
Centene Corp. (a)		2,301		146,229
Charles River Laboratories International, Inc. (a)		596		103,913
Chemed Corp.		264		119,082
Cigna Corp. (a)		1,834		344,150
DaVita, Inc. (a)		3,068		242,802
Encompass Health Corp.		100		6,193
HCA Healthcare, Inc.		2,339		227,023
Humana, Inc.		1,153		447,076
IQVIA Holdings, Inc. (a)		63		8,938
Laboratory Corp. of America Holdings (a)		92		15,282
Molina Healthcare, Inc. (a)		1,083		192,752
PPD, Inc. (a)		814		21,815
Syneos Health, Inc. (a)		113		6,582
Teladoc Health, Inc. (a)		46		8,779
UnitedHealth Group, Inc.		12,987		3,830,516
				6,123,615
Household Products & Wares — 0.5%
Avery Dennison Corp.		574		65,487
Church & Dwight Co., Inc.		4,577		353,802
The Clorox Co.		3,002		658,549
Reynolds Consumer Products, Inc.		1,505		52,284
				1,130,122
Pharmaceuticals — 6.9%
AbbVie, Inc.		45,387		4,456,096
Agios Pharmaceuticals, Inc. (a)		4		214
AmerisourceBergen Corp.		1,493		150,450
Bristol-Myers Squibb Co.		23,196		1,363,925
Cardinal Health, Inc.		5,899		307,869
DexCom, Inc. (a)		1,033		418,778
Eli Lilly and Co.		23,123		3,796,334
Global Blood Therapeutics, Inc. (a)		41		2,588
Herbalife Nutrition Ltd. (a)		1,797		80,829
Horizon Therapeutics PLC (a)		103		5,725
Johnson & Johnson		7,189		1,010,989

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
McKesson Corp.		3,043	$	466,857
Merck & Co., Inc.		42,539		3,289,541
Neurocrine Biosciences, Inc. (a)		1,553		189,466
PRA Health Sciences, Inc. (a)		856		83,280
Reata Pharmaceuticals, Inc. Class A (a)		15		2,340
Sarepta Therapeutics, Inc. (a)		63		10,101
Zoetis, Inc.		7,423		1,017,248
				16,652,630
				53,880,370
Energy — 0.1%
Energy – Alternate Sources — 0.1%
Enphase Energy, Inc. (a)		1,431		68,073
SolarEdge Technologies, Inc. (a)		667		92,566
				160,639
Pipelines — 0.0%
Cheniere Energy, Inc. (a)		806		38,946
Equitrans Midstream Corp.		13,803		114,703
				153,649
				314,288
Financial — 7.4%
Diversified Financial Services — 5.1%
Ares Management Corp. Class A		1,369		54,349
Cboe Global Markets, Inc.		803		74,904
Credit Acceptance Corp. (a) (b)		7		2,933
Intercontinental Exchange, Inc.		4,630		424,108
LendingTree, Inc. (a)		5		1,448
LPL Financial Holdings, Inc.		406		31,830
Mastercard, Inc. Class A		19,135		5,658,220
SLM Corp.		7,545		53,041
T. Rowe Price Group, Inc.		1,188		146,718
Tradeweb Markets, Inc. Class A		403		23,431
Virtu Financial, Inc. Class A		8,582		202,535
Visa, Inc. Class A		28,208		5,448,939
The Western Union Co.		5,042		109,008
				12,231,464
Insurance — 0.6%
Alleghany Corp.		6		2,935
Aon PLC Class A		1,802		347,065
Axis Capital Holdings Ltd.		20		811
Brown & Brown, Inc.		218		8,886
Erie Indemnity Co. Class A		10		1,919
Lincoln National Corp.		842		30,977
Marsh & McLennan Cos., Inc.		1,087		116,711
Primerica, Inc.		989		115,318
The Progressive Corp.		10,311		826,014
RenaissanceRe Holdings Ltd.		69		11,801
				1,462,437
Private Equity — 0.0%
The Carlyle Group, Inc.		8		223
Real Estate Investment Trusts (REITS) — 1.7%
American Tower Corp.		3,732		964,871
Americold Realty Trust		992		36,010
Brookfield Property REIT, Inc. Class A (b)		3,145		31,324
CoreSite Realty Corp.		1,528		184,980
Crown Castle International Corp.		1,100		184,085
Equinix, Inc.		794		557,626
Equity LifeStyle Properties, Inc.		3,937		245,984
Extra Space Storage, Inc.		679		62,719
Iron Mountain, Inc.		10,001		261,026
Public Storage		3,680		706,155
SBA Communications Corp.		11		3,277
Simon Property Group, Inc.		13,680		935,439
				4,173,496
				17,867,620
Industrial — 4.4%
Aerospace & Defense — 1.6%
HEICO Corp.		28		2,790
HEICO Corp. Class A		54		4,387
Lockheed Martin Corp.		7,869		2,871,556
Mercury Systems, Inc. (a)		81		6,371
Northrop Grumman Corp.		2,379		731,400
Spirit AeroSystems Holdings, Inc. Class A		2,102		50,322
TransDigm Group, Inc.		116		51,278
				3,718,104
Building Materials — 0.1%
Armstrong World Industries, Inc.		289		22,530
Carrier Global Corp.		6,546		145,452
Trex Co., Inc. (a)		909		118,234
				286,216
Electrical Components & Equipment — 0.0%
Energizer Holdings, Inc.		737		35,000
Generac Holdings, Inc. (a)		407		49,625
Universal Display Corp.		38		5,686
				90,311
Electronics — 0.4%
Agilent Technologies, Inc.		419		37,027
Allegion PLC		1,034		105,695
Amphenol Corp. Class A		2,269		217,393
Coherent, Inc. (a)		37		4,846
Jabil, Inc.		1,113		35,705
Keysight Technologies, Inc. (a)		1,031		103,904
Mettler-Toledo International, Inc. (a)		491		395,525
PerkinElmer, Inc.		295		28,937
Roper Technologies, Inc.		25		9,707

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Waters Corp. (a)		312	$	56,285
				995,024
Engineering & Construction — 0.0%
frontdoor, Inc. (a)		347		15,382
Environmental Controls — 0.1%
Waste Management, Inc.		971		102,839
Hand & Machine Tools — 0.0%
Lincoln Electric Holdings, Inc.		620		52,229
MSA Safety, Inc.		98		11,215
				63,444
Machinery – Construction & Mining — 0.0%
BWX Technologies, Inc.		1,340		75,898
Vertiv Holdings Co. (a)		174		2,359
				78,257
Machinery – Diversified — 0.2%
Cognex Corp.		899		53,688
Graco, Inc.		502		24,091
Nordson Corp.		666		126,347
Rockwell Automation, Inc.		1,734		369,342
				573,468
Miscellaneous - Manufacturing — 0.7%
3M Co.		6,413		1,000,364
Axon Enterprise, Inc. (a)		41		4,023
Donaldson Co., Inc.		58		2,698
Illinois Tool Works, Inc.		3,411		596,414
				1,603,499
Packaging & Containers — 0.2%
Amcor PLC (a)		3,941		40,238
Ball Corp.		215		14,940
Berry Global Group, Inc. (a)		4,479		198,509
Crown Holdings, Inc. (a)		313		20,386
Graphic Packaging Holding Co.		4,549		63,640
				337,713
Shipbuilding — 0.0%
Huntington Ingalls Industries, Inc.		69		12,040
Transportation — 1.1%
C.H. Robinson Worldwide, Inc.		589		46,566
Expeditors International of Washington, Inc.		2,244		170,634
J.B. Hunt Transport Services, Inc.		346		41,638
Landstar System, Inc.		2,118		237,873
Old Dominion Freight Line, Inc.		1,004		170,268
Union Pacific Corp.		5,922		1,001,232
United Parcel Service, Inc. Class B		8,776		975,716
XPO Logistics, Inc. (a)		990		76,477
				2,720,404
				10,596,701
Technology — 37.1%
Computers — 12.0%
Accenture PLC Class A		13,612		2,922,769
Apple, Inc.		67,503		24,625,094
CACI International, Inc. Class A (a)		78		16,917
Cognizant Technology Solutions Corp. Class A		1,427		81,082
Crowdstrike Holdings, Inc. Class A (a)		55		5,516
Dell Technologies C (a)		983		54,006
EPAM Systems, Inc. (a)		722		181,951
Fortinet, Inc. (a)		4,443		609,891
Genpact Ltd.		561		20,488
Globant SA (a)		29		4,346
Leidos Holdings, Inc.		245		22,949
Lumentum Holdings, Inc. (a)		406		33,061
NetApp, Inc.		4,585		203,436
Pure Storage, Inc. Class A (a)		370		6,412
Science Applications International Corp.		1,309		101,683
Zscaler, Inc. (a)		47		5,146
				28,894,747
Office & Business Equipment — 0.1%
Zebra Technologies Corp. Class A (a)		1,008		257,998
Semiconductors — 6.9%
Advanced Micro Devices, Inc. (a)		7,360		387,210
Analog Devices, Inc.		218		26,735
Applied Materials, Inc.		20,528		1,240,917
Broadcom, Inc.		5,642		1,780,672
Entegris, Inc.		2,117		125,009
Inphi Corp. (a)		275		32,312
IPG Photonics Corp. (a)		15		2,406
KLA Corp.		4,710		916,001
Lam Research Corp.		4,541		1,468,832
Maxim Integrated Products, Inc.		2,365		143,343
Microchip Technology, Inc.		1,085		114,261
MKS Instruments, Inc.		349		39,521
Monolithic Power Systems, Inc.		116		27,492
NVIDIA Corp.		11,232		4,267,149
QUALCOMM, Inc.		35,093		3,200,832
Teradyne, Inc.		4,519		381,901
Texas Instruments, Inc.		14,955		1,898,836
Xilinx, Inc.		5,461		537,308
				16,590,737
Software — 18.1%
Activision Blizzard, Inc.		6,924		525,532
Adobe, Inc. (a)		9,106		3,963,933
Akamai Technologies, Inc. (a)		2,774		297,068
Alteryx, Inc. Class A (a)		41		6,736
ANSYS, Inc. (a)		926		270,142
Aspen Technology, Inc. (a)		1,176		121,845

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Number of Shares		Value
Atlassian Corp. PLC Class A (a)		1,831	$	330,074
Autodesk, Inc. (a)		1,927		460,919
Bill.com Holdings, Inc. (a)		141		12,720
Black Knight, Inc. (a)		99		7,183
Broadridge Financial Solutions, Inc.		1,910		241,023
Cadence Design Systems, Inc. (a)		7,958		763,650
CDK Global, Inc.		802		33,219
Ceridian HCM Holding, Inc. (a)		57		4,518
Cerner Corp.		6,124		419,800
Change Healthcare, Inc. (a)		337		3,774
Citrix Systems, Inc.		1,665		246,270
Cloudflare, Inc. Class A (a)		74		2,660
Coupa Software, Inc. (a)		163		45,158
Datadog, Inc. Class A (a)		1,991		173,117
DocuSign, Inc. (a)		116		19,976
Dropbox, Inc. Class A (a)		4,792		104,322
Dynatrace, Inc. (a)		105		4,263
Elastic NV (a)		37		3,412
Electronic Arts, Inc. (a)		1,625		214,581
Everbridge, Inc. (a)		22		3,044
Fair Isaac Corp. (a)		846		353,662
Fastly, Inc. Class A  (a)		38		3,235
Fiserv, Inc. (a)		259		25,284
Five9, Inc. (a)		341		37,738
Guidewire Software, Inc. (a)		11		1,219
HubSpot, Inc. (a)		35		7,852
Intuit, Inc.		4,214		1,248,145
Jack Henry & Associates, Inc.		1,745		321,132
Manhattan Associates, Inc. (a)		1,225		115,395
Medallia, Inc. (a)		55		1,388
Microsoft Corp.		124,020		25,239,310
MongoDB, Inc. (a)		26		5,885
MSCI, Inc.		1,109		370,206
New Relic, Inc. (a)		35		2,412
Nutanix, Inc. Class A (a)		132		3,129
Oracle Corp.		55,336		3,058,421
Paychex, Inc.		4,325		327,619
Paycom Software, Inc. (a)		291		90,131
Pegasystems, Inc.		24		2,428
Pluralsight, Inc. Class A (a)		65		1,173
PTC, Inc. (a)		89		6,923
RealPage, Inc. (a)		60		3,901
RingCentral, Inc. Class A (a)		51		14,536
salesforce.com, Inc. (a)		4,109		769,739
ServiceNow, Inc. (a)		2,584		1,046,675
Slack Technologies, Inc. Class A (a)		254		7,897
Smartsheet, Inc. Class A (a)		69		3,513
Splunk, Inc. (a)		181		35,965
SS&C Technologies Holdings, Inc		353		19,937
Synopsys, Inc. (a)		3,109		606,255
Take-Two Interactive Software, Inc. (a)		1,367		190,792
Teradata Corp. (a)		1,776		36,941
Twilio, Inc. Class A (a)		107		23,478
Tyler Technologies, Inc. (a)		174		60,357
Veeva Systems, Inc. Class A (a)		2,152		504,472
VMware, Inc. Class A (a) (b)		1,510		233,839
Workday, Inc. Class A (a)		811		151,949
Zoom Video Communications, Inc. Class A (a)		2,127		539,280
Zynga, Inc. Class A (a)		1,826		17,420
				43,768,572
				89,512,054
Utilities — 0.0%
Electric — 0.0%
NRG Energy, Inc.		1,172		38,160
TOTAL COMMON STOCK (Cost $181,165,485)				240,028,902
TOTAL EQUITIES (Cost $181,165,485)				240,028,902
Rights — 0.1%
Communications — 0.0%
Telecommunications — 0.0%
T-Mobile US, Inc., Expires 7/27/20 (a)		461		78
Consumer, Non-cyclical — 0.1%
Pharmaceuticals — 0.1%
Bristol-Myers Squibb Co., Expires 3/31/21 (a)		29,980		107,328
TOTAL RIGHTS (Cost $64,028)				107,406
				107,406
Mutual Funds — 0.2%
Diversified Financial Services — 0.2%
State Street Navigator Securities Lending Prime Portfolio (c)		499,551		499,551
TOTAL MUTUAL FUNDS (Cost $499,551)				499,551
TOTAL LONG-TERM INVESTMENTS (Cost $181,729,064)				240,635,859

MassMutual Premier Disciplined Growth Fund — Portfolio of Investments (Continued)

	Principal Amount		Value
Short-Term Investments — 0.6%
Repurchase Agreement — 0.6%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (d)	$	1,401,626	$	1,401,626
TOTAL SHORT-TERM INVESTMENTS (Cost $1,401,626)				1,401,626
TOTAL INVESTMENTS — 100.3% (Cost $183,130,690) (e)				242,037,485
Other Assets/(Liabilities) — (0.3)%				(666,987	)
NET ASSETS — 100.0%			$	241,370,498

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 June 30, 2020, was $679,599 or 0.28% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $190,130 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).

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

(d) Maturity value of $1,401,626. Collateralized by U.S. Government Agency obligations with a rate of 0.625%, maturity date of 1/15/24, and an aggregate market value, including accrued interest, of $1,429,694.

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

MassMutual Premier Small Cap Opportunities Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 99.0%
Common Stock — 99.0%
Basic Materials — 2.7%
Forest Products & Paper — 0.6%
Schweitzer-Mauduit International, Inc.		40,700	$	1,359,787
Mining — 2.1%
Compass Minerals International, Inc.		47,810		2,330,738
Kaiser Aluminum Corp.		30,054		2,212,575
				4,543,313
				5,903,100
Communications — 1.3%
Internet — 1.3%
Q2 Holdings, Inc. (a) (b)		34,289		2,941,653
Consumer, Cyclical — 12.5%
Auto Parts & Equipment — 2.7%
Dorman Products, Inc. (a)		38,751		2,599,030
Visteon Corp. (a)		50,021		3,426,438
				6,025,468
Entertainment — 0.3%
Cedar Fair LP (c)		24,172		664,730
Retail — 9.5%
AutoNation, Inc. (a)		86,043		3,233,496
BJ's Wholesale Club Holdings, Inc. (a)		127,177		4,739,887
Jack in the Box, Inc.		38,606		2,860,318
Ollie's Bargain Outlet Holdings, Inc. (a)		14,567		1,422,467
Suburban Propane Partners LP (c)		200,907		2,872,970
Texas Roadhouse, Inc.		59,396		3,122,448
The Wendy's Co.		130,006		2,831,531
				21,083,117
				27,773,315
Consumer, Non-cyclical — 27.3%
Biotechnology — 3.6%
Emergent BioSolutions, Inc. (a)		53,674		4,244,540
NeoGenomics, Inc. (a) (b)		53,992		1,672,672
Twist Bioscience Corp. (a)		29,328		1,328,559
Zai Lab Ltd. ADR (a)		9,725		798,714
				8,044,485
Commercial Services — 6.0%
ASGN, Inc. (a)		68,376		4,559,312
Korn Ferry		110,768		3,403,901
Monro, Inc. (b)		54,146		2,974,781
Paylocity Holding Corp. (a)		17,052		2,487,716
				13,425,710
Foods — 1.7%
BellRing Brands, Inc. Class A (a)		97,464		1,943,432
The Simply Good Foods Co. (a)		100,759		1,872,102
				3,815,534
Health Care – Products — 8.2%
Adaptive Biotechnologies Corp. (a) (b)		30,867		1,493,345
AtriCure, Inc. (a)		48,395		2,175,355
Inspire Medical Systems, Inc. (a)		37,116		3,229,834
Intersect ENT, Inc. (a)		60,582		820,280
OraSure Technologies, Inc. (a)		64,794		753,554
Quidel Corp. (a)		14,993		3,354,534
Repligen Corp. (a)		19,373		2,394,697
Tandem Diabetes Care, Inc. (a)		39,817		3,938,698
				18,160,297
Health Care – Services — 4.6%
Addus HomeCare Corp. (a)		34,929		3,233,028
LHC Group, Inc. (a)		34,021		5,930,541
Tenet Healthcare Corp. (a)		63,424		1,148,609
				10,312,178
Household Products & Wares — 1.5%
Acco Brands Corp.		467,501		3,319,257
Pharmaceuticals — 1.7%
Axsome Therapeutics, Inc. (a) (b)		11,001		905,162
Collegium Pharmaceutical, Inc. (a) (b)		63,618		1,113,315
G1 Therapeutics, Inc. (a) (b)		28,894		700,968
uniQure NV (a)		22,892		1,031,514
				3,750,959
				60,828,420
Energy — 1.8%
Energy – Alternate Sources — 1.3%
Renewable Energy Group, Inc. (a)		121,226		3,003,980
Pipelines — 0.5%
Noble Midstream Partners LP (c)		121,577		1,028,542
				4,032,522

MassMutual Premier Small Cap Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Financial — 19.4%
Banks — 5.5%
The Bank of NT Butterfield & Son Ltd.		91,133	$	2,222,734
BankUnited, Inc.		93,901		1,901,495
Cathay General Bancorp		56,423		1,483,925
CIT Group, Inc. (b)		67,161		1,392,248
Heritage Financial Corp.		100,701		2,014,020
IBERIABANK Corp.		48,356		2,202,132
Signature Bank		10,076		1,077,326
				12,293,880
Diversified Financial Services — 2.5%
Federated Hermes, Inc.		46,839		1,110,084
Focus Financial Partners, Inc. Class A (a)		61,236		2,023,850
Stifel Financial Corp.		50,699		2,404,654
				5,538,588
Insurance — 0.8%
ProSight Global, Inc. (a)		90,132		802,175
Selectquote, Inc. (a)		38,999		987,844
				1,790,019
Real Estate Investment Trusts (REITS) — 6.0%
Brandywine Realty Trust		240,121		2,614,918
DiamondRock Hospitality Co.		413,331		2,285,720
EPR Properties (b)		77,786		2,577,050
Four Corners Property Trust, Inc.		152,712		3,726,173
National Storage Affiliates Trust		71,044		2,036,121
				13,239,982
Savings & Loans — 4.6%
Berkshire Hills Bancorp, Inc.		84,264		928,589
OceanFirst Financial Corp. (b)		98,580		1,737,965
Pacific Premier Bancorp, Inc.		100,007		2,168,152
Sterling Bancorp		129,091		1,512,947
WSFS Financial Corp.		134,238		3,852,631
				10,200,284
				43,062,753
Industrial — 16.1%
Building Materials — 2.4%
Masonite International Corp. (a)		34,362		2,672,676
Summit Materials, Inc. Class A (a)		168,050		2,702,244
				5,374,920
Electrical Components & Equipment — 3.1%
Energizer Holdings, Inc.		58,740		2,789,563
EnerSys		29,403		1,892,965
Generac Holdings, Inc. (a)		19,068		2,324,961
				7,007,489
Electronics — 0.9%
Atkore International Group, Inc. (a)		71,011		1,942,151
Engineering & Construction — 3.0%
Comfort Systems USA, Inc.		24,756		1,008,807
KBR, Inc.		149,158		3,363,513
TopBuild Corp. (a)		20,622		2,346,165
				6,718,485
Environmental Controls — 1.4%
Evoqua Water Technologies Corp. (a)		108,752		2,022,787
US Ecology, Inc.		30,069		1,018,738
				3,041,525
Machinery – Diversified — 0.7%
Chart Industries, Inc. (a)		31,891		1,546,395
Metal Fabricate & Hardware — 2.5%
Mayville Engineering Co., Inc. (a)		74,015		584,719
Rexnord Corp.		131,469		3,832,321
Valmont Industries, Inc.		9,461		1,074,959
				5,491,999
Miscellaneous - Manufacturing — 0.8%
EnPro Industries, Inc.		36,283		1,788,389
Transportation — 1.3%
CryoPort, Inc. (a) (b)		53,010		1,603,552
Hub Group, Inc. Class A (a)		27,571		1,319,548
				2,923,100
				35,834,453
Technology — 14.7%
Computers — 2.7%
CACI International, Inc. Class A (a)		13,776		2,987,739
Perspecta, Inc.		125,120		2,906,537
				5,894,276
Semiconductors — 5.6%
Brooks Automation, Inc.		91,111		4,030,751
MKS Instruments, Inc.		42,502		4,812,926
Semtech Corp. (a)		70,844		3,699,474
				12,543,151
Software — 6.4%
1Life Healthcare, Inc. (a)		30,748		1,116,767
Bottomline Technologies de, Inc. (a)		73,417		3,727,381
Envestnet, Inc. (a)		23,220		1,707,599
j2 Global, Inc. (b)		51,075		3,228,451

MassMutual Premier Small Cap Opportunities Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Zynga, Inc. Class A (a)		478,802	$	4,567,771
				14,347,969
				32,785,396
Utilities — 3.2%
Electric — 1.0%
Avista Corp.		59,622		2,169,645
Gas — 2.2%
National Fuel Gas Co.		41,361		1,734,267
South Jersey Industries, Inc.		128,286		3,205,867
				4,940,134
				7,109,779
TOTAL COMMON STOCK (Cost $222,489,751)				220,271,391
TOTAL EQUITIES (Cost $222,489,751)				220,271,391
Mutual Funds — 0.0%
Diversified Financial Services — 0.0%
State Street Navigator Securities Lending Prime Portfolio (d)		40,393		40,393
TOTAL MUTUAL FUNDS (Cost $40,393)				40,393
TOTAL LONG-TERM INVESTMENTS (Cost $222,530,144)				220,311,784

	Principal Amount
Short-Term Investments — 1.0%
Repurchase Agreement — 1.0%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (e)	$	2,353,621		2,353,621
TOTAL SHORT-TERM INVESTMENTS (Cost $2,353,621)				2,353,621
TOTAL INVESTMENTS — 100.0% (Cost $224,883,765) (f)				222,665,405
Other Assets/(Liabilities) — (0.0)%				(78,286	)
NET ASSETS — 100.0%			$	222,587,119

Abbreviation Legend
ADR	American Depositary Receipt

Notes to Portfolio of Investments
Percentages are stated as a percent of net assets.
(a)	Non-income producing security.
(b)	Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2020, was $14,391,147 or 6.47% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $14,464,784 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments. (Note 2).
(c)	Security is a Master Limited Partnership.
(d)	Represents investment of security lending cash collateral. (Note 2).
(e)	Maturity value of $2,353,621. Collateralized by U.S. Government Agency obligations with a rate of 2.375%, maturity date of 2/29/24, and an aggregate market value, including accrued interest, of $2,400,754.
(f)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Global Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 99.3%
Common Stock — 99.3%
Cayman Islands — 4.7%
Farfetch Ltd. Class A (a) (b)		88,990	$	1,536,856
JD.com, Inc. ADR (b)		175,354		10,552,804
StoneCo Ltd. Class A (a) (b)		46,074		1,785,828
				13,875,488
France — 7.6%
Dassault Systemes SE		5,068		873,438
Kering SA		13,052		7,089,448
LVMH Moet Hennessy Louis Vuitton SE		29,602		12,965,638
Societe Generale SA (b)		77,805		1,294,432
				22,222,956
Germany — 3.2%
SAP SE		68,442		9,526,819
India — 2.9%
DLF Ltd.		2,531,173		4,983,804
ICICI Bank Ltd. Sponsored ADR		375,314		3,486,667
				8,470,471
Italy — 0.2%
Brunello Cucinelli SpA (b)		22,473		666,922
Japan — 14.6%
Capcom Co. Ltd.		81,300		2,950,663
FANUC Corp.		17,000		3,037,775
Keyence Corp.		18,700		7,807,666
MinebeaMitsumi, Inc.		53,500		970,003
Murata Manufacturing Co. Ltd.		123,230		7,220,560
Nidec Corp.		108,800		7,264,237
Omron Corp.		63,900		4,281,094
Takeda Pharmaceutical Co. Ltd.		74,608		2,662,809
TDK Corp.		66,500		6,592,440
				42,787,247
Netherlands — 3.1%
Airbus SE (b)		89,053		6,336,899
ASML Holding NV		3,612		1,324,080
uniQure NV (b)		29,368		1,323,322
				8,984,301
Spain — 1.3%
Industria de Diseno Textil SA		149,371		3,949,258
Sweden — 2.9%
Assa Abloy AB Class B		182,188		3,699,182
Atlas Copco AB Class A		113,809		4,812,537
				8,511,719
Switzerland — 0.3%
Zur Rose Group AG (b)		2,810		765,831
United Kingdom — 1.9%
International Game Technology PLC (a)		96,849		861,956
Prudential PLC		243,216		3,662,752
Unilever PLC		22,244		1,199,342
				5,724,050
United States — 56.6%
Adobe, Inc. (b)		34,881		15,184,048
Agilent Technologies, Inc.		52,841		4,669,559
Alphabet, Inc. Class A (b)		17,503		24,820,129
Amazon.com, Inc. (b)		1,517		4,185,130
Analog Devices, Inc.		2,533		310,647
Anthem, Inc.		17,012		4,473,816
Avantor, Inc. (b)		167,181		2,842,077
Blueprint Medicines Corp. (b)		19,081		1,488,318
Boston Scientific Corp. (b)		39,253		1,378,173
Centene Corp. (b)		48,271		3,067,622
Colgate-Palmolive Co.		29,276		2,144,760
Electronic Arts, Inc. (b)		22,467		2,966,767
Equifax, Inc.		29,822		5,125,805
Facebook, Inc. Class A (b)		58,358		13,251,351
Fidelity National Information Services, Inc.		29,368		3,937,955
Illumina, Inc. (b)		4,168		1,543,619
Incyte Corp. (b)		20,051		2,084,703
Intel Corp.		26,938		1,611,701
Intuit, Inc.		39,414		11,674,033
Ionis Pharmaceuticals, Inc. (b)		35,302		2,081,406
IQVIA Holdings, Inc. (b)		6,298		893,560
MacroGenics, Inc. (b)		69,816		1,949,263
Maxim Integrated Products, Inc.		120,114		7,280,110
Microsoft Corp.		16,278		3,312,736
PayPal Holdings, Inc. (b)		56,726		9,883,371
Pegasystems, Inc. (a)		9,611		972,345
Phathom Pharmaceuticals, Inc. (b)		31,962		1,051,869
S&P Global, Inc.		43,248		14,249,351
Sage Therapeutics, Inc. (b)		16,088		668,939
Sarepta Therapeutics, Inc. (a) (b)		14,898		2,388,745
Twist Bioscience Corp. (b)		1,657		75,062
United Parcel Service, Inc. Class B		35,950		3,996,921
Veracyte, Inc. (a) (b)		38,017		984,640
Visa, Inc. Class A		17,513		3,382,986
The Walt Disney Co.		41,194		4,593,543
Zimmer Biomet Holdings, Inc.		11,876		1,417,519
				165,942,579
TOTAL COMMON STOCK (Cost $166,398,024)				291,427,641

MassMutual Premier Global Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Preferred Stock — 0.0%
India — 0.0%
Zee Entertainment Enterprises Ltd. 6.000%		573,050	$	26,412
TOTAL PREFERRED STOCK (Cost $22,480)				26,412
TOTAL EQUITIES (Cost $166,420,504)				291,454,053
Mutual Funds — 0.0%
United States — 0.0%
State Street Navigator Securities Lending Prime Portfolio (c)		72,237		72,237
TOTAL MUTUAL FUNDS (Cost $72,237)				72,237
TOTAL LONG-TERM INVESTMENTS (Cost $166,492,741)				291,526,290

	Principal Amount
Short-Term Investments — 0.4%
Repurchase Agreement — 0.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (d)	$	1,149,343		1,149,343
TOTAL SHORT-TERM INVESTMENTS (Cost $1,149,343)				1,149,343
TOTAL INVESTMENTS — 99.7% (Cost $167,642,084) (e)				292,675,633
Other Assets/(Liabilities) — 0.3%				733,970
NET ASSETS — 100.0%			$	293,409,603

Abbreviation Legend  

ADR American Depositary Receipt

Notes to Portfolio of Investments  

Percentages are stated as a percent of net assets.  

(a)	Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2020, was $7,575,097 or 2.58% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $7,640,099 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).
(b)	Non-income producing security.
(c)	Represents investment of security lending cash collateral. (Note 2).
(d)	Maturity value of $1,149,343. Collateralized by U.S. Government Agency obligations with a rate of 0.625%, maturity date of 1/15/24, and an aggregate market value, including accrued interest, of $1,172,368.
(e)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier International Equity Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 97.0%
Common Stock — 97.0%
Australia — 2.1%
CSL Ltd.		21,089	$	4,180,959
Belgium — 0.9%
Galapagos NV (a)		8,984		1,763,639
Canada — 5.7%
Alimentation Couche-Tard, Inc. Class B		134,422		4,215,045
CAE, Inc.		62,535		1,014,305
Dollarama, Inc.		54,267		1,805,169
Saputo, Inc.		69,733		1,662,682
Shopify, Inc. Class A (a)		2,745		2,607,851
				11,305,052
Cayman Islands — 4.4%
Alibaba Group Holding Ltd. Sponsored ADR  (a)		15,139		3,265,482
Tencent Holdings Ltd.		58,900		3,783,371
WH Group Ltd. (b)		2,029,000		1,741,259
				8,790,112
Denmark — 3.3%
Ascendis Pharma A/S ADR (a)		7,236		1,070,204
Novo Nordisk A/S Class B		83,738		5,418,785
				6,488,989
France — 14.5%
Dassault Systemes SE		11,421		1,968,337
Edenred		41,480		1,812,130
EssilorLuxottica SA (a)		10,465		1,341,292
Hermes International		6,773		5,652,900
Kering SA		2,738		1,487,198
L'Oreal SA (a)		5,337		1,710,989
LVMH Moet Hennessy Louis Vuitton SE		9,124		3,996,300
Sartorius Stedim Biotech		6,031		1,522,308
SEB SA		25,420		4,197,061
Ubisoft Entertainment SA (a)		26,238		2,160,952
Worldline SA (a) (b)		32,745		2,829,063
				28,678,530
Germany — 7.5%
Fresenius Medical Care AG & Co. KGaA		40,085		3,417,552
Infineon Technologies AG		111,921		2,615,962
SAP SE		41,354		5,756,291
Siemens Healthineers AG (b)		63,407		3,036,679
				14,826,484
Ireland — 3.4%
Flutter Entertainment PLC (a)		19,935		2,614,108
James Hardie Industries PLC		117,084		2,234,812
Medtronic PLC		20,364		1,867,379
				6,716,299
Italy — 0.9%
Davide Campari-Milano SpA		211,999		1,784,164
Japan — 9.4%
Daikin Industries Ltd.		14,900		2,396,012
Hitachi Ltd.		81,200		2,563,439
Hoya Corp.		43,600		4,175,353
Keyence Corp.		8,500		3,548,939
Nidec Corp.		26,600		1,775,999
Nihon M&A Center, Inc.		49,600		2,240,502
Nitori Holdings Co. Ltd.		10,000		1,958,553
				18,658,797
Netherlands — 8.4%
Aalberts NV		66,486		2,176,470
Adyen NV (a) (b)		1,274		1,856,077
Airbus SE (a)		29,851		2,124,159
ASML Holding NV		17,088		6,264,089
Boskalis Westminster (a)		13,226		260,568
STMicroelectronics NV		144,714		3,925,830
				16,607,193
New Zealand — 1.1%
Xero Ltd. (a)		36,487		2,272,159
Spain — 2.9%
Amadeus IT Group SA		34,187		1,778,846
Grifols SA		108,899		3,303,421
Prosegur Cash SA (b)		824,995		694,618
				5,776,885
Sweden — 5.3%
Atlas Copco AB Class A		106,520		4,504,314
Epiroc AB Class A		167,896		2,089,036
Swedish Match AB		54,738		3,843,418
				10,436,768
Switzerland — 8.9%
Barry Callebaut AG Registered		1,201		2,288,962
Lonza Group AG Registered		4,004		2,111,285
Novartis AG Registered		14,254		1,238,539
Roche Holding AG		15,408		5,334,736
Sika AG Registered		10,179		1,956,507
Temenos Group AG Registered		14,610		2,265,223

MassMutual Premier International Equity Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
VAT Group AG (b)		13,112	$	2,390,528
				17,585,780
Taiwan — 2.4%
Taiwan Semiconductor Manufacturing Co. Ltd.		446,000		4,719,590
United Kingdom — 12.2%
Atlassian Corp. PLC Class A (a)		10,300		1,856,781
Blue Prism Group PLC (a)		36,128		508,360
boohoo Group PLC (a)		492,003		2,507,756
Britvic PLC		192,063		1,830,990
Compass Group PLC		121,275		1,668,395
Ferguson PLC		18,366		1,502,430
GVC Holdings PLC		160,893		1,474,172
Legal & General Group PLC		763,739		2,085,604
London Stock Exchange Group PLC		14,840		1,535,107
Melrose Industries PLC		1,128,263		1,590,230
Next PLC		44,657		2,704,155
Ocado Group PLC (a)		93,930		2,358,019
Rightmove PLC		104,438		705,808
Trainline PLC (a) (b)		315,673		1,705,198
				24,033,005
United States — 3.7%
EPAM Systems, Inc. (a)		14,847		3,741,592
ResMed, Inc.		18,886		3,626,112
				7,367,704
TOTAL COMMON STOCK (Cost $157,613,886)				191,992,109
Preferred Stock — 0.0%
India — 0.0%
Zee Entertainment Enterprises Ltd. 6.000%		653,347		30,113
TOTAL PREFERRED STOCK (Cost $19,494)				30,113
TOTAL EQUITIES (Cost $157,633,380)				192,022,222
TOTAL LONG-TERM INVESTMENTS (Cost $157,633,380)				192,022,222

	Principal Amount
Short-Term Investments — 3.4%
Repurchase Agreement — 3.4%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (c)	$	6,679,571		6,679,571
TOTAL SHORT-TERM INVESTMENTS (Cost $6,679,571)				6,679,571
TOTAL INVESTMENTS — 100.4% (Cost $164,312,951) (d)				198,701,793
Other Assets/(Liabilities) — (0.4)%				(881,312	)
NET ASSETS — 100.0%			$	197,820,481

Abbreviation Legend 

ADR American Depositary Receipt

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

(a)	Non-income producing security.
(b)	Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $14,253,422 or 7.21% of net assets.
(c)	Maturity value of $6,679,571. Collateralized by U.S. Government Agency obligations with a rate of 0.625%, maturity date of 1/15/24, and an aggregate market value, including accrued interest, of $6,813,225.
(d)	See Note 3 for aggregate cost for federal tax purposes.

MassMutual Premier Strategic Emerging Markets Fund —  Portfolio of Investments

June 30, 2020 (Unaudited)

	Number of Shares		Value
Equities — 97.1%
Common Stock — 94.1%
Bermuda — 2.1%
Credicorp Ltd.		15,297	$	2,044,750
Jardine Strategic Holdings Ltd.		60,371		1,303,118
				3,347,868
Brazil — 4.6%
Ambev SA		356,939		928,103
Ambev SA ADR		80,498		212,515
Atacadao SA		135,994		493,901
B3 SA - Brasil Bolsa Balcao		154,026		1,560,341
Itau Unibanco Holding SA Sponsored ADR		335,591		1,573,922
Vale SA Sponsored ADR		238,176		2,455,594
				7,224,376
Cayman Islands — 24.2%
Alibaba Group Holding Ltd. Sponsored ADR  (a)		34,664		7,477,025
Budweiser Brewing Co. APAC Ltd. (b)		524,300		1,523,232
Hansoh Pharmaceutical Group Co. Ltd. (a) (b)		194,000		918,967
Huazhu Group Ltd. ADR (c)		137,892		4,833,115
Innovent Biologics, Inc. (a) (b)		189,500		1,407,499
Meituan Dianping Class B (a)		73,600		1,634,899
New Oriental Education & Technology Group, Inc. Sponsored ADR (a)		3,030		394,597
OneConnect Financial Technology Co. Ltd. (a)		65,152		1,189,675
Pagseguro Digital Ltd. Class A (a)		41,127		1,453,428
Tencent Holdings Ltd.		174,990		11,240,274
Wuxi Biologics Cayman, Inc. (a) (b)		27,500		503,881
ZTO Express Cayman, Inc. ADR		146,411		5,374,748
				37,951,340
Chile — 0.8%
Falabella SA		417,704		1,322,170
China — 5.4%
Jiangsu Hengrui Medicine Co. Ltd. Class A		279,678		3,651,246
Ping An Insurance Group Co. of China Ltd. Class A		472,471		4,773,306
				8,424,552
Colombia — 0.3%
Grupo Aval Acciones y Valores SA		121,386		529,243
Egypt — 0.8%
Commercial International Bank Egypt SAE		296,222		1,191,269
France — 5.2%
Kering SA		14,773		8,024,243
LVMH Moet Hennessy Louis Vuitton SE		124		54,312
				8,078,555
Hong Kong — 4.6%
AIA Group Ltd.		771,200		7,177,611
India — 11.4%
HDFC Bank Ltd.		110,731		1,579,315
Housing Development Finance Corp. Ltd.		266,591		6,275,800
Kotak Mahindra Bank Ltd.		290,998		5,219,882
Oberoi Realty Ltd.		107,679		519,751
Tata Consultancy Services Ltd.		127,700		3,539,729
Zee Entertainment Enterprises Ltd.		353,109		799,358
				17,933,835
Indonesia — 1.3%
Bank Central Asia Tbk PT		673,000		1,342,137
Indocement Tunggal Prakarsa Tbk PT		448,935		371,140
Semen Indonesia Persero Tbk PT		516,500		348,223
				2,061,500
Italy — 2.1%
Brunello Cucinelli SpA (a)		178		5,283
Moncler SpA (a)		36,120		1,379,156
PRADA SpA (a)		528,500		1,832,263
				3,216,702
Mexico — 5.1%
Alsea SAB de CV (a)		322,928		317,666
Fomento Economico Mexicano SAB de CV		545,994		3,389,108
Fomento Economico Mexicano SAB de CV Sponsored ADR		13,858		859,335
Grupo Aeroportuario del Sureste SAB de CV Class B		53,888		603,718
Grupo Financiero Inbursa SAB de CV Class O		692,348		481,055
Grupo Mexico SAB de CV Series B		1,035,967		2,406,867
				8,057,749
Netherlands — 2.3%
Yandex NV Class A (a)		73,575		3,680,222
Philippines — 2.7%
Ayala Land, Inc.		2,088,100		1,397,919
SM Investments Corp.		126,030		2,351,074
SM Prime Holdings, Inc.		644,357		407,595
				4,156,588
Republic of Korea — 2.8%
Amorepacific Corp.		5,090		715,747
AMOREPACIFIC Group		6,737		291,934
Samsung Biologics Co. Ltd. (a) (b)		5,158		3,348,114
				4,355,795

MassMutual Premier Strategic Emerging Markets Fund —  Portfolio of Investments (Continued)

	Number of Shares		Value
Russia — 6.9%
MMC Norilsk Nickel PJSC ADR (c)		1,790	$	47,131
MMC Norilsk Nickel PJSC ADR (Russia)		14,148		369,885
Novatek PJSC Sponsored GDR Registered		35,732		5,072,823
Novatek PJSC Sponsored GDR Registered		8,849		1,258,328
Polyus PJSC (a)		1,630		275,746
Polyus PJSC GDR (b) (d)		5,075		427,061
Polyus PJSC GDR (b) (d)		649		54,613
Sberbank of Russia PJSC		1,163,009		3,326,156
				10,831,743
South Africa — 0.8%
FirstRand Ltd.		595,211		1,304,731
Switzerland — 0.6%
Cie Financiere Richemont SA Registered		14,277		909,145
Taiwan — 5.6%
Taiwan Semiconductor Manufacturing Co. Ltd.		835,000		8,836,004
Turkey — 0.6%
Akbank T.A.S. (a)		982,272		870,975
United States — 3.9%
Yum China Holdings, Inc.		127,478		6,127,867
TOTAL COMMON STOCK (Cost $144,021,347)				147,589,840
Preferred Stock — 3.0%
Brazil — 1.4%
Lojas Americanas SA 0.640%
		369,601		2,187,117
India — 0.0%
Zee Entertainment Enterprises Ltd. 6.000%		742,906		34,241
Singapore — 1.6%
Grab Holdings, Inc., (Acquired 6/18/19, Cost $2,438,401) (a) (d) (e) (f)		395,658		2,438,401
TOTAL PREFERRED STOCK (Cost $4,454,838)				4,659,759
TOTAL EQUITIES (Cost $148,476,185)				152,249,599
Mutual Funds — 0.0%
United States — 0.0%
State Street Navigator Securities Lending Prime Portfolio (g)		270		270
TOTAL MUTUAL FUNDS (Cost $270)				270
TOTAL LONG-TERM INVESTMENTS (Cost $148,476,455)				152,249,869

	Principal Amount
Short-Term Investments — 3.9%
Repurchase Agreement — 3.9%
Fixed Income Clearing Corp., Repurchase Agreement, dated 6/30/20, 0.000%, due 7/01/20 (h)	$	6,165,067		6,165,067
TOTAL SHORT-TERM INVESTMENTS (Cost $6,165,067)				6,165,067
TOTAL INVESTMENTS — 101.0% (Cost $154,641,522) (i)				158,414,936
Other Assets/(Liabilities) — (1.0)%				(1,627,305	)
NET ASSETS — 100.0%			$	156,787,631

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

Notes to Portfolio of Investments

Percentages are stated as a percent of net assets.

^(a) Non-income producing security.

^(b) Security is exempt from registration under Regulation S or Rule 144A of the Securities Act of 1933. These securities are considered restricted and may be resold in transactions exempt from registration. At June 30, 2020, the aggregate market value of these securities amounted to $8,183,367 or 5.22% of net assets.

^(c) Denotes all or a portion of security on loan. The total value of securities on loan as of June 30, 2020, was $2,703,635 or 1.72% of net assets. Total securities on loan may be less than the amounts identified in the Portfolio of Investments. The Fund received $2,801,102 of non-cash collateral (U.S. Treasury and/or Agency obligations) related to securities lending activity. This amount is not reflected on the Portfolio of Investments.  (Note 2).

^(d) This security is fair valued in good faith in accordance with procedures approved by the Board of Trustees. At June 30, 2020, these securities amounted to a value of $2,920,075 or 1.86% of net assets.

^(e) Investment was valued using significant unobservable inputs.

^(f) Restricted security. Certain securities are restricted as to resale. At June 30, 2020, these securities amounted to a value of $2,438,401 or 1.56% of net assets. The Fund generally bears the costs, if any, associated with the disposition of restricted securities.

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

^(h) Maturity value of $6,165,067. Collateralized by U.S. Government Agency obligations with a rate of 0.625%, maturity date of 1/15/24, and an aggregate market value, including accrued interest, of $6,288,470.

MassMutual Premier Strategic Emerging Markets Fund —  Portfolio of Investments (Continued)

Notes to Portfolio of Investments (continued)

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

Notes to Portfolio of Investments (Unaudited)

1. The Funds

MassMutual Premier Funds (the "Trust") is registered under the Investment Company Act of 1940, as amended (the "1940 Act"), as an open-end management investment company. The Trust is organized under the laws of the Commonwealth of Massachusetts as a Massachusetts business trust pursuant to an Agreement and Declaration of Trust dated August 1, 1994, as amended and restated as of November 21, 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"):

MassMutual Premier Short-Duration Bond Fund ("Short-Duration Bond Fund")

MassMutual Premier Inflation-Protected and Income Fund ("Inflation-Protected and Income Fund")

MassMutual Premier Core Bond Fund ("Core Bond Fund")

MassMutual Premier Diversified Bond Fund ("Diversified Bond Fund")

MassMutual Premier High Yield Fund ("High Yield Fund")

MassMutual Premier Balanced Fund ("Balanced Fund")

MassMutual Premier Disciplined Value Fund ("Disciplined Value Fund")

MassMutual Premier Main Street Fund ("Main Street Fund")

MassMutual Premier Disciplined Growth Fund ("Disciplined Growth Fund")

MassMutual Premier Small Cap Opportunities Fund ("Small Cap Opportunities Fund")

MassMutual Premier Global Fund ("Global Fund")

MassMutual Premier International Equity Fund ("International Equity Fund")

MassMutual Premier Strategic Emerging Markets Fund ("Strategic Emerging Markets Fund")

2. Significant Accounting Policies

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

Investment Valuation

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

Investments for which market quotations are not available or for which a pricing service or vendor does not provide a value, or for which such market quotations or values are considered by the investment adviser or subadviser to be unreliable (including, for example, certain foreign securities, thinly-traded securities, certain restricted securities, certain initial public offerings, or securities whose values may have been affected by a significant event) are stated at fair valuations determined in good faith by the Funds' Valuation Committee¹ in accordance with procedures approved annually by the Trustees, and under the general oversight of the Trustees. The Funds' Valuation Committee employs various methods to determine fair valuations including a regular review of significant inputs and assumptions and review of any related market activity. The Funds' Valuation Committee reports to the Trustees at its regularly scheduled meetings. It is possible that fair value prices will be used by the Funds to a significant extent. The value determined for an investment using the Funds' fair value procedures may differ from recent market prices for the investment and may be significantly different from the value realized upon the sale of such investment.

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

For investments in equity or debt issued by privately held companies or funds (“Private Company” or collectively, the “Private Companies”) and any other investments fair valued using significant unobservable inputs, as described below, the fair valuation approaches used by third party service providers and/or the Funds’ subadvisers utilize one or a combination of, but not limited to, the following inputs:

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

Notes to Portfolio of Investments (Unaudited) (Continued)

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

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

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

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

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

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

The Disciplined Value Fund, Disciplined Growth Fund, and Small Cap Opportunities Fund characterized all long-term investments at Level 1, and all short-term investments at Level 2, as of June 30, 2020. For each Fund noted in the preceding sentence, the level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.

Notes to Portfolio of Investments (Unaudited) (Continued)

The following is the aggregate value by input level, as of June 30, 2020, for the remaining Funds' investments:

Short-Duration Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	181,170,331		$	—	$	181,170,331
Municipal Obligations		—			714,326			—		714,326
Non-U.S. Government Agency Obligations		—			228,160,582			—		228,160,582
U.S. Government Agency Obligations and Instrumentalities		—			2,822,966			—		2,822,966
U.S. Treasury Obligations		—			1,904,990			—		1,904,990
Purchased Options		—			400,632			—		400,632
Short-Term Investments		—			19,992,918			—		19,992,918
Total Investments	$	—		$	435,166,745		$	—	$	435,166,745
Asset Derivatives
Futures Contracts	$	97,597		$	—		$	—	$	97,597
Liability Derivatives
Futures Contracts	$	(851,672	)	$	—		$	—	$	(851,672	)
Swap Agreements		—			(49,556	)		—		(49,556	)
Total	$	(851,672	)	$	(49,556	)	$	—	$	(901,228	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Inflation-Protected and Income Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Corporate Debt	$	—		$	3,024,357		$	—	$	3,024,357
Municipal Obligations		—			1,577,331			—		1,577,331
Non-U.S. Government Agency Obligations		—			149,509,886			—		149,509,886
U.S. Government Agency Obligations and Instrumentalities		—			10,160,000			—		10,160,000
U.S. Treasury Obligations		—			78,063,329			—		78,063,329
Purchased Options		—			732,568			—		732,568
Short-Term Investments		—			103,226,398			—		103,226,398
Total Investments	$	—		$	346,293,869		$	—	$	346,293,869
Asset Derivatives
Futures Contracts	$	26,328		$	—		$	—	$	26,328
Swap Agreements		—			4,509,508			—		4,509,508
Total	$	26,328		$	4,509,508		$	—	$	4,535,836
Liability Derivatives
Futures Contracts	$	(21,888	)	$	—		$	—	$	(21,888	)
Swap Agreements		—			(379,694	)		—		(379,694	)
Total	$	(21,888	)	$	(379,694	)	$	—	$	(401,582	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Core Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Preferred Stock	$	3,311,100		$	—		$	—	$	3,311,100
Corporate Debt		—			532,318,461			—		532,318,461
Municipal Obligations		—			6,070,176			—		6,070,176
Non-U.S. Government Agency Obligations		—			440,010,634			—		440,010,634
Sovereign Debt Obligations		—			9,556,282			—		9,556,282
U.S. Government Agency Obligations and Instrumentalities		—			333,471,197			—		333,471,197
U.S. Treasury Obligations		—			22,023,229			—		22,023,229
Purchased Options		—			2,517,132			—		2,517,132
Short-Term Investments		—			181,840,773			—		181,840,773
Total Investments	$	3,311,100		$	1,527,807,884		$	—	$	1,531,118,984
Asset Derivatives
Futures Contracts	$	108,418		$	—		$	—	$	108,418
Liability Derivatives
Futures Contracts	$	(1,252,486	)	$	—		$	—	$	(1,252,486	)
Swap Agreements		—			(136,895	)		—		(136,895	)
Total	$	(1,252,486	)	$	(136,895	)	$	—	$	(1,389,381	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Diversified Bond Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Common Stock	$	13,995		$	807		$	—	$	14,802
Preferred Stock		254,700			—			—		254,700
Corporate Debt		—			106,692,919			—		106,692,919
Municipal Obligations		—			847,481			—		847,481
Non-U.S. Government Agency Obligations		—			66,984,234			—		66,984,234
Sovereign Debt Obligations		—			1,417,240			—		1,417,240
U.S. Government Agency Obligations and Instrumentalities		—			43,883,758			—		43,883,758
U.S. Treasury Obligations		—			9,703,222			—		9,703,222
Purchased Options		—			468,618			—		468,618
Warrants		—			—			3,755		3,755
Short-Term Investments		—			26,933,226			—		26,933,226
Total Investments	$	268,695		$	256,931,505		$	3,755	$	257,203,955
Asset Derivatives
Forward Contracts	$	—		$	198,603		$	—	$	198,603
Futures Contracts		2,795			—			—		2,795
Total	$	2,795		$	198,603		$	—	$	201,398
Liability Derivatives
Forward Contracts	$	—		$	(104,710	)	$	—	$	(104,710	)
Futures Contracts		(214,455	)		—			—		(214,455	)
Swap Agreements		—			(23,609	)		—		(23,609	)
Total	$	(214,455	)	$	(128,319	)	$	—	$	(342,774	)

Notes to Portfolio of Investments (Unaudited) (Continued)

High Yield Fund

Asset Investments	Level 1		Level 2		Level 3			Total
Common Stock	$	457,679	$	12,681	$	—	+	$	470,360
Bank Loans		—		18,744,417		—			18,744,417
Corporate Debt		—		460,331,407		—			460,331,407
Warrants		—		—		—	+		—
Total Investments	$	457,679	$	479,088,505	$	__		$	479,546,184

Notes to Portfolio of Investments (Unaudited) (Continued)

Balanced Fund

Asset Investments	Level 1			Level 2			Level 3		Total
Common Stock	$	69,929,390		$	—		$	—	$	69,929,390
Preferred Stock		127,350			—			—		127,350
Corporate Debt		—			17,079,964			—		17,079,964
Municipal Obligations		—			419,213			—		419,213
Non-U.S. Government Agency Obligations		—			13,803,577			—		13,803,577
Sovereign Debt Obligations		—			297,630			—		297,630
U.S. Government Agency Obligations and Instrumentalities		—			11,295,518			—		11,295,518
U.S. Treasury Obligations		—			1,989,409			—		1,989,409
Purchased Options		—			83,816			—		83,816
Rights		12,881			—			—		12,881
Mutual Funds		10,119,867			—			—		10,119,867
Short-Term Investments		—			6,899,594			—		6,899,594
Total Investments	$	80,189,488		$	51,868,721		$	—	$	132,058,209
Asset Derivatives
Futures Contracts	$	6,583		$	—		$	—	$	6,583
Liability Derivatives
Futures Contracts	$	(11,045	)	$	—		$	—	$	(11,045	)
Swap Agreements		—			(4,718	)		—		(4,718	)
Total	$	(11,045	)	$	(4,718	)	$	—	$	(15,763	)

Notes to Portfolio of Investments (Unaudited) (Continued)

Main Street Fund

Asset Investments	Level 1		Level 2			Level 3		Total
Common Stock	$	109,031,769	$	712,892	*	$	—	$	109,744,661
Short-Term Investments		—		243,729			—		243,729
Total Investments	$	109,031,769	$	956,621		$	—	$	109,988,390

Notes to Portfolio of Investments (Unaudited) (Continued)

Global Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Cayman Islands	$	13,875,488	$	—	$	—	$	13,875,488
France		—		22,222,956		—		22,222,956
Germany		—		9,526,819		—		9,526,819
India		3,486,667		4,983,804		—		8,470,471
Italy		—		666,922		—		666,922
Japan		—		42,787,247		—		42,787,247
Netherlands		1,323,322		7,660,979		—		8,984,301
Spain		—		3,949,258		—		3,949,258
Sweden		—		8,511,719		—		8,511,719
Switzerland		—		765,831		—		765,831
United Kingdom		861,956		4,862,094		—		5,724,050
United States		165,942,579		—		—		165,942,579
Preferred Stock
India		26,412		—		—		26,412
Mutual Funds		72,237		—		—		72,237
Short-Term Investments		—		1,149,343		—		1,149,343
Total Investments	$	185,588,661	$	107,086,972	$	—	$	292,675,633

Notes to Portfolio of Investments (Unaudited) (Continued)

International Equity Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Australia	$	—	$	4,180,959	$	—	$	4,180,959
Belgium		—		1,763,639		—		1,763,639
Canada		11,305,052		—		—		11,305,052
Cayman Islands		3,265,482		5,524,630		—		8,790,112
Denmark		1,070,204		5,418,785		—		6,488,989
France		—		28,678,530		—		28,678,530
Germany		—		14,826,484		—		14,826,484
Ireland		1,867,379		4,848,920		—		6,716,299
Italy		—		1,784,164		—		1,784,164
Japan		—		18,658,797		—		18,658,797
Netherlands		—		16,607,193		—		16,607,193
New Zealand		—		2,272,159		—		2,272,159
Spain		—		5,776,885		—		5,776,885
Sweden		—		10,436,768		—		10,436,768
Switzerland		—		17,585,780		—		17,585,780
Taiwan		—		4,719,590		—		4,719,590
United Kingdom		1,856,781		22,176,224		—		24,033,005
United States		7,367,704		—		—		7,367,704
Preferred Stock
India		30,113		—		—		30,113
Short-Term Investments		—		6,679,571		—		6,679,571
Total Investments	$	26,762,715	$	171,939,078	$	—	$	198,701,793

Notes to Portfolio of Investments (Unaudited) (Continued)

Strategic Emerging Markets Fund

Asset Investments	Level 1		Level 2		Level 3		Total
Common Stock*
Bermuda	$	2,044,750	$	1,303,118	$	—	$	3,347,868
Brazil		7,224,376		—		—		7,224,376
Cayman Islands		20,722,588		17,228,752		—		37,951,340
Chile		1,322,170		—		—		1,322,170
China		—		8,424,552		—		8,424,552
Colombia		529,243		—		—		529,243
Egypt		—		1,191,269		—		1,191,269
France		—		8,078,555		—		8,078,555
Hong Kong		—		7,177,611		—		7,177,611
India		—		17,933,835		—		17,933,835
Indonesia		—		2,061,500		—		2,061,500
Italy		—		3,216,702		—		3,216,702
Mexico		8,057,749		—		—		8,057,749
Netherlands		3,680,222		—		—		3,680,222
Philippines		—		4,156,588		—		4,156,588
Republic of Korea		—		4,355,795		—		4,355,795
Russia		1,258,328		9,573,415		—		10,831,743
South Africa		—		1,304,731		—		1,304,731
Switzerland		—		909,145		—		909,145
Taiwan		—		8,836,004		—		8,836,004
Turkey		—		870,975		—		870,975
United States		6,127,867		—		—		6,127,867
Preferred Stock
Brazil		2,187,117		—		—		2,187,117
India		34,241		—		—		34,241
Singapore		—		—		2,438,401		2,438,401
Mutual Funds		270		—		—		270
Short-Term Investments		—		6,165,067		—		6,165,067
Total Investments	$	53,188,921	$	102,787,614	$	2,438,401	$	158,414,936

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

+ Represents a security at $0 value as of June 30, 2020.

Notes to Portfolio of Investments (Unaudited) (Continued)

Derivative Instruments

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

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

Securities Lending

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

Each Fund expects that in connection with any securities on loan, the loan will be secured continuously by collateral consisting of cash (U.S. currency) and/or securities (U.S. Treasury and Agency obligations) adjusted daily to have value at least equal to the current market value of the securities loaned. The market value of the loaned securities is determined at the close of business of a Fund and any additional collateral is delivered to the Fund the next business day. The Funds bear the risk of loss with respect to the investment of cash collateral. As with other extensions of credit, the Funds may bear the risk of delay in recovery of the loaned securities or even loss of rights in the collateral should the Borrower of the securities fail financially. Pursuant to the Lending Agreement, the Agent has provided indemnification to the Funds in the event of default by a Borrower with respect to a loan. The Funds receive compensation for lending their securities in the form of a securities loan fee paid by the Borrower, as well as a share of the income earned on investment of the cash collateral received for the loaned securities. At June 30, 2020, the Funds' collateral was equal to or greater than 100% of the market value of securities on loan.

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

Accounting for Investment Transactions

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

Notes to Portfolio of Investments (Unaudited) (Continued)

Foreign Currency Translation

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

Foreign Securities

The Global Fund invests a significant amount of its assets in foreign securities and each of the International Equity Fund and Strategic Emerging Markets Fund invests substantially all of its assets in foreign securities. The other Funds may also invest in foreign securities. Foreign securities, including American Depositary Receipts, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of a Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Federal Income Tax

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

Dividends and Distributions to Shareholders

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

Notes to Portfolio of Investments (Unaudited) (Continued)

3. Federal Income Tax Information

At June 30, 2020, the aggregate cost of investments and the unrealized appreciation (depreciation) in the value of all investments owned by the Fund(s), as computed on a federal income tax basis, were as follows:

	Federal Income Tax Cost		Tax Basis Unrealized Appreciation		Tax Basis Unrealized (Depreciation)			Net Unrealized Appreciation (Depreciation)
Short-Duration Bond Fund	$	443,596,748	$	7,495,721	$	(15,925,724	)	$	(8,430,003	)
Inflation-Protected and Income Fund		344,277,915		7,351,073		(5,335,119	)		2,015,954
Core Bond Fund		1,519,409,551		45,792,000		(34,082,567	)		11,709,433
Diversified Bond Fund		259,133,108		7,610,558		(9,539,711	)		(1,929,153	)
High Yield Fund		519,510,560		11,761,008		(51,725,384	)		(39,964,376	)
Balanced Fund		124,035,359		13,798,402		(5,775,552	)		8,022,850
Disciplined Value Fund		89,103,407		3,109,876		(10,151,820	)		(7,041,944	)
Main Street Fund		95,218,322		20,082,042		(5,311,974	)		14,770,068
Disciplined Growth Fund		183,130,690		62,038,629		(3,131,834	)		58,906,795
Small Cap Opportunities Fund		224,883,765		32,786,456		(35,004,816	)		(2,218,360	)
Global Fund		167,642,084		129,288,882		(4,255,333	)		125,033,549
International Equity Fund		164,312,951		40,460,295		(6,071,453	)		34,388,842
Strategic Emerging Markets Fund		154,641,522		15,995,665		(12,222,251	)		3,773,414

4. New Accounting Pronouncements

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

In March 2020, FASB issued Accounting Standards Update 2020-04 — Reference Rate Reform (Topic 848) — Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional temporary financial reporting relief from the effect of certain types of contract modifications due to the planned discontinuation of the London Interbank Offered Rate (“LIBOR”) and other interbank-offered based reference rates as of the end of 2021. ASU 2020-04 is effective for certain reference rate-related contract modifications that occur during the period March 12, 2020 through December 31, 2022. Management is currently evaluating the impact, if any, of applying ASU 2020-04.

5. Legal Proceedings

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

Notes to Portfolio of Investments (Unaudited) (Continued)

The potential amounts sought to be recovered from the Balanced Fund, Disciplined Value Fund, and Small Cap Opportunities Fund, are approximately $44,200, $299,880, and $414,800, respectively, plus interest and the Official Committee’s court costs.

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

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

6. Coronavirus (COVID-19) Pandemic

The global pandemic outbreak of the novel coronavirus known as COVID-19 has produced, and will likely continue to produce, substantial market volatility, severe market dislocations and liquidity constraints in many markets, and global business disruption, and it may result in future significant adverse effects, such as exchange trading suspensions and closures, declines in global financial markets, higher default rates, and a substantial economic downturn or recession throughout the world. Such factors may have a significant adverse effect on a Fund’s performance and have the potential to impair the ability of a Fund’s investment adviser, subadvisers, or other service providers to serve the Fund and could lead to disruptions that negatively impact the Fund.