Fund Holdings As of 6/30/2021 MassMutual Short-Duration Bond Fund Barings Prior to 5/1/2021, the Fund name was MassMutual Premier Short-Duration Bond Fund. Fund Position Market Security Name Weighting % Value Us 10yr Note (Cbt)sep21 Xcbt 20210921 23.43 44,652,500 USTREAS T-Bill Auction Ave 3 Mon 5.24 9,987,667 Avis Budget Rental Car Funding AESOP LLC 3.02% 2.80 5,340,681 Goldman Sachs Group, Inc. 4.25% 2.79 5,319,704 Fna VI LLC 1.35% 2.22 4,229,828 COLLEGE AVE STUDENT LOANS LLC 2.32% 1.79 3,409,152 Adani Ports & Special Economic Zone 3.38% 1.71 3,251,532 Tower Bersama Infrastructure Tbk Pt 4.25% 1.70 3,235,134 Citigroup Inc. 4.4% 1.64 3,128,408 Country Garden Holdings Company Limited 8% 1.62 3,080,136 STARWOOD MORTGAGE RESIDENTIAL TRUST 1.53% 1.61 3,073,822 SOFI CONSUMER LOAN PROGRAM TRUST 3.89% 1.60 3,054,751 Occidental Petroleum Corporation 5.5% 1.58 3,008,904 Li & Fung LTD 4.5% 1.55 2,952,486 Avis Budget Rental Car Funding AESOP LLC 3.15% 1.51 2,875,133 Nelnet Student Loan Trust 1.5% 1.46 2,773,573 BX COMMERCIAL MORTGAGE TRUST 2.07% 1.45 2,760,068 Petroleos Mexicanos 4.62% 1.44 2,750,387 Vale Overseas Limited 6.25% 1.41 2,691,164 CARVANA AUTO RECEIVABLES TRUST 1.5% 1.39 2,644,293 Kref 2018-FL1 Ltd / Kref 2018-FL1 LLC 1.43% 1.36 2,600,819 Bpce Sa 5.7% 1.34 2,562,527 Residential Asset Mortgage Products, Inc. 1.07% 1.30 2,477,346 Bank of Nova Scotia 4.5% 1.29 2,454,452 SLM Student Loan Trust 0.38% 1.27 2,422,290 Ford Motor Credit Company LLC 3.35% 1.16 2,208,660 Sirius Xm Radio Inc 3.88% 1.16 2,203,960 DATABANK ISSUER LLC 2.06% 1.15 2,198,203 Avolon Holdings Funding Limited 2.88% 1.15 2,193,759 Pacific Gas and Electric Company 1.75% 1.14 2,163,740 Africa Finance Corporation 3.12% 1.13 2,153,601 Neuberger Berman Loan Advisers Clo 24 Ltd/Llc 1.54% 1.13 2,144,982 CSMC 2021-NQM2 TRUST 1.54% 1.12 2,135,678 Steel Capital S.A. 3.15% 1.09 2,085,496 Federal Home Loan Mortgage Corporation 2.32% 1.09 2,074,347 ONE Gas, Inc. 1.1% 1.07 2,046,422 OAK STREET INVESTMENT GRADE NET LEASE FUND 2.8% 1.07 2,039,719 Triton Container International Limited 2.05% 1.06 2,022,270 Enlink Midstream Partners LP 4.4% 1.06 2,016,000 Service Properties Trust 4.35% 1.06 2,014,000 Lazard Group LLC 3.75% 1.05 2,007,809 CAMB Commercial Mortgage Trust 2019-LIFE 1.52% 1.05 2,002,504 Flatiron Collateralized Loan Obligations 17 Ltd 1.14% 1.05 2,001,086 Morgan Stanley 4.35% 1.04 1,982,533 B.A.T. Capital Corporation 4.7% 1.04 1,978,449 CNO Financial Group, Inc. 5.25% 1.04 1,973,870 Lloyds Banking Group plc 4.05% 1.04 1,972,862 UBS Group AG 4.12% 1.03 1,971,780 Mattel, Inc. 3.38% 1.03 1,971,250 ABN AMRO Bank N.V. 4.75% 1.03 1,967,243 NEWREZ WAREHOUSE SECURITIZATION TRUST 2021-1 1.14% 1.03 1,957,000 JPMorgan Chase & Co. 0.82% 1.03 1,956,394 BUSINESS JET SECURITIES LLC 2.16% 1.03 1,955,635 QVC, Inc. 4.38% 1.02 1,950,806 Credit Suisse AG 6.5% 1.01 1,933,120 Prior to 5/1/2021, the Fund name was MassMutual Premier Short-Duration Bond Fund. Athene Global Funding 2015-1 2.75% 1.01 1,928,817 Aircastle Limited 5% 1.00 1,914,616 Aercap Ireland Capital DAC 2.88% 1.00 1,914,278 Host Hotels & Resorts, L.P. 3.75% 1.00 1,902,747 Trafigura Securitisation Finance PLC 4.29% 0.98 1,871,027 Blackrock Tcp Capital Corp 4.12% 0.98 1,864,940 BX COMMERCIAL MORTGAGE TRUST 1.77% 0.97 1,855,579 NAVIENT PRIVATE EDUCATION LOAN TRUST 2.77% 0.97 1,855,158 Enstar Group Ltd 4.5% 0.96 1,836,761 Bx Commercial Mortgage Trust 1.67% 0.96 1,827,428 CITIGROUP MORTGAGE LOAN TRUST 3.17% 0.96 1,824,816 Plains All American Pipeline L.P./PAA Finance Corp. 4.65% 0.96 1,823,902 Sallie Mae Pfd 144A 1% 0.94 1,797,230 Hyndai Capital America 1.5% 0.94 1,791,926 Energy Transfer LP 4.2% 0.94 1,786,020 SANTANDER REVOLVING AUTO LOAN TRUST 2019-A 3.45% 0.94 1,785,402 United States Treasury Bonds 8% 0.93 1,770,896 Sixth Street Specialty Lending Inc 3.88% 0.93 1,767,434 GoldenTree Loan Management US CLO 4 LTD / LLC 1.25% 0.92 1,750,044 Las Vegas Sands Corp 3.2% 0.92 1,747,602 DIAMOND RESORTS OWNER TRUST 2.05% 0.90 1,717,385 MHC COMMERCIAL MORTGAGE TRUST 2021-MHC 2.17% 0.90 1,712,139 Horizon Aircraft Finance III Ltd/LLC 4.46% 0.89 1,704,409 GLP China Holdings Limited 4.97% 0.89 1,704,161 Newell Brands Inc. 4.35% 0.87 1,660,288 Trust F/1401 (Fibra Uno) 5.25% 0.87 1,659,375 SOFI ALTERNATIVE TRUST 4.56% 0.85 1,616,156 Wens Foodstuff Gro 2.35% 0.84 1,610,404 AmTrust Financial Services Inc. 6.12% 0.83 1,579,426 Trinity Rail Leasing 2019 Llc 3.82% 0.82 1,566,676 Strctrd Asset Invt 1.02% 0.81 1,544,876 Syngenta Finance N.V. 4.44% 0.81 1,541,159 Bank of America Corporation 4% 0.80 1,532,393 Verus Securitization Trust 2019- INV2 3.22% 0.80 1,525,808 MAF Sukuk Ltd 4.5% 0.80 1,520,901 Hercules Capital Inc 4.62% 0.80 1,518,907 WESTLAKE AUTOMOBILE RECEIVABLES TRUST 2.33% 0.79 1,501,986 Cbam 2018-6 Ltd / Llc 1.45% 0.79 1,500,104 Imperial Brands Finance Plc 3.12% 0.77 1,466,425 Societe Generale S.A. 1.49% 0.76 1,455,697 CARMAX AUTO OWNER TRUST 2.8% 0.76 1,446,482 Telefonaktiebolaget LM Ericsson (publ) 4.12% 0.76 1,444,665 Westlake Automobile Receivables Trust 2019-3 3.59% 0.75 1,435,729 VANTAGE DATA CENTERS ISSUER LLC 1.64% 0.75 1,429,374 SB Capital SA 5.25% 0.75 1,429,312 Banco Santander, S.A. 1.85% 0.74 1,416,268 Berry Global Inc 1.65% 0.74 1,402,746 Cable Onda, S.A. 4.5% 0.74 1,402,352 Arab National Bank Subordinated Regs 10/30 Var 0.73 1,392,862 STARWOOD MORTGAGE RESIDENTIAL TRUST 2.92% 0.73 1,389,631 Equitrans Midstream Corporation 4.75% 0.71 1,362,094 Newfield Exploration Company 5.62% 0.71 1,358,471 AFFIRM ASSET SECURITIZATION TRUST 1.07% 0.71 1,357,934 Avis Budget Rental Car Funding AESOP LLC 4.73% 0.71 1,348,775 CAMB Commercial Mortgage Trust 2019-LIFE 2.22% 0.70 1,338,232 EQT Corporation 3% 0.70 1,332,731 ONE NEW YORK PLAZA TRUST 2.27% 0.70 1,332,185 CARVANA AUTO RECEIVABLES TRUST 1.88% 0.70 1,331,340 national central cooling co psc tabreed 2.5% 0.70 1,331,055 Bacardi Limited 4.45% 0.69 1,318,601 Diamondback Energy Inc 0.9% 0.69 1,315,447 VERUS SECURITIZATION TRUST 3.29% 0.68 1,288,325 Qwest Corporation 6.75% 0.67 1,284,806 Prior to 5/1/2021, the Fund name was MassMutual Premier Short-Duration Bond Fund. Store Master Funding I 4.4% 0.67 1,270,552 Antares Holdings LP 6% 0.67 1,269,317 GOODGREEN 2.76% 0.66 1,263,923 Rr 3 Ltd 1.27% 0.66 1,250,008 Ares Capital Corporation 4.2% 0.65 1,245,249 Ares Capital Corporation 3.88% 0.65 1,243,130 Penske Truck Leasing Co., L.P. 1.7% 0.65 1,242,099 Shimao Group Holdings Ltd 6.12 0.65 1,236,600 CARMAX AUTO OWNER TRUST 1.55% 0.65 1,235,222 ELARA HGV TIMESHARE ISSUER LLC 3.45% 0.64 1,225,490 MFA TRUST 2.3% 0.64 1,222,998 WESTLAKE AUTOMOBILE RECEIVABLES TRUST 1.23% 0.64 1,221,308 Thrust Engine Leasing 2021 Dac / Thrust Engine Leasing 2021 Statutory Trust 0.63 1,199,954 General Motors Financial Company Inc 3.25% 0.62 1,178,754 Synchrony Financial 2.85% 0.61 1,166,872 HSBC Holdings plc 4.25% 0.61 1,165,105 BGC Partners, Inc. 4.38% 0.61 1,163,664 Cars Db4 LP 4.17% 0.61 1,156,603 Milos Clo Ltd 1.26% 0.60 1,147,329 Ford Motor Credit Company LLC 1.39% 0.59 1,125,762 NBN Co Limited 1.45% 0.59 1,118,001 Glencore Funding LLC 4.12% 0.59 1,116,819 Macquarie Group Limited 1.34% 0.58 1,111,062 Goodgreen Trust 2017-1 3.93% 0.58 1,108,865 Danske Bank A/S 5% 0.58 1,105,038 Bluemountain Fuji U.S.