Fund MSCI ACWI Index

Sector Weightings: Defines what % of each sector this fund holdscompared to its benchmark listed here.

QTD YTD

Sector Attribution: Describes how sector weighting decisions affectedreturns by sector.

Sector Attribution Details:Sector Fund Weight Q T D Y T D

Communication Services 13.32 0.21 0.21

Consumer Discretionary 14.52 0.26 0.26

Consumer Staples 3.98 0.09 0.09

Energy 0.71 -0.09 -0.09

Financials 14.77 0.78 0.78

Health Care 15.11 2.20 2.20

Industrials 15.31 0.66 0.66

Information Technology 19.83 0.67 0.67

Materials 0.00 0.06 0.06

Real Estate 1.92 -0.08 -0.08

Utilities 0.00 0.08 0.08

Cash 0.01 -0.00 -0.00

Quarterly Portfolio Commentary:

Jason Marino, CFA, CAIA Investment DirectorInvestment Experience: 18 Years

HIGHLIGHTS • Global equities posted gains in each month of the quarter as the MSCIACWI Index delivered sizable gains for the period.• The information technology and industrials sectors delivered thelargest positive contribution to benchmark returns.• Sector allocation, which is a function of the Fund’s bottom-upinvestment process, modestly contributed to the Fund’s performance.• Stock selection contributed to relative returns, with particular strengthin the health care and industrials sectors.• Country allocation, which is a function of the Fund manager’s bottom-up process, contributed to relative performance

Fund Objective: The Fund seeks long-term capital appreciation.

These materials and the platform of investments made available by MassMutual are offered without regard to the individualized needs of any plan, itsparticipants, or beneficiaries. These materials are not intended as impartial investment advice or to give advice in a fiduciary capacity to any plan.

NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE

Quarterly Review

R5 SHARE CLASS TICKER: MGFSX

As of 03/31/2019

MassMutual Premier Global FundOppenheimerFunds, Inc.

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Quarterly Portfolio Commentary

After posting their worst quarter since 2011 in the last quarter of 2018, global equities delivered one of their best quarters since 2010 during the firstquarter of 2019. All sectors in the MSCI ACWI Index delivered positive quarterly returns. The information technology sector posted the sharpest advanceand landed as the top performing and top contributing sector. IT services and communications equipment companies led broad-based strong sectorperformance as each advanced more than 20%. The real estate sector, which was the second best performing sector in the quarter, benefitted fromdeclining interest rates. The sector’s contribution was muted due to its diminutive weighting in the benchmark. The financials and health care sectorslagged all others, though they still posted strong absolute returns. The financials sector faced challenges due to low and falling interest rates whileproviders and services weighed on the health care sector.

After lagging behind the peer group and benchmark in 2018, the Fund posted strong absolute and relative returns in the first quarter of 2019. While sectorallocation was positive, stock selection was the clear driver of relative returns. From an absolute return perspective, the Fund realized double-digit returnsin each of the benchmark sectors and management delivered positive relative performance in all but two sectors – energy and real estate.

Stock selection was strongest in the health care sector as a number of biotechnology holdings realized share price increases of more than 50%. SageTherapeutics and Loxo Oncology were among the largest contributors to relative returns in the sector. Sage Therapeutics’ share price advanced after thecompany’s postpartum depression treatment met primary endpoints of a phase III trial. The drug is seen as a breakthrough as patients using the drug realizebenefits in a much shorter timeframe than existing depression treatments. Loxo Oncology realized sharp share price advances after Eli Lilly announced an$8 billion cash offer for the company.

The Fund did not deliver positive relative returns in the energy and real estate sectors. The Fund has a longstanding relative underweight allocation tothese sectors. Sector weightings are a function of the Fund manager’s bottom-up process and are indicative of where they are finding growth.

The Fund remains invested in companies which management believes will benefit from the growing global middle class. As a result, at quarter-end, theFund held overweight exposures to the industrials, information technology, and communication services sectors, which tend to benefit from the growthof global affluence.

Average Annual Total Return

Q T D Y T D 1 Year 3 Year 5 Year 10 year

MassMutual Premier Global R5 16.76% 16.76% 1.20% 13.86% 7.73% 13.79%

MSCI ACWI Index 12.18% 12.18% 2.60% 10.67% 6.45% 11.98%

Category Average Return -- -- 1.85% 9.96% 5.89% 11.79%

Category Rank -- -- 57 11 22 16

# of Funds in Category -- -- 900 732 617 370

Performance shown is for class R5 shares. Gross expenses = 0.97%, Net expense = 0.97%. Current performance may be higher or lower. Max Sales chargefor R5 is 0%

Investment Risks - The Fund’s Princ ipa l R isks include-Cash Position Risk, Equity Securities Risk, Foreign Investment Risk; Emerging Markets Risk;Currency Risk, Growth Company Risk, Large Company Risk, Liquidity Risk, Management Risk, Market Risk, Small and Mid-Cap Company Risk, andValuation Risk. Please refer to the summary prospectus (a copy can be obtained by sending an email to fundinfo@massmutual.com) for more informationon the specific risks.The Morningstar percenti le ranking is based on the fund’s total-return percenti le rank relat ive to al l funds that have the samecategory for the same t ime period. The highest (or most favorable) percentile rank is 1%, and the lowest (or least favorable) percentile rank is 100%.Morningstar total return includes both income and capital gains or losses and is not adjusted for sales charges. © 2019 Morningstar, Inc. All RightsReserved. The information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) isnot warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from anyuse of this information.

MassMutual Premier Global Fund

Performance shown is past performance. Past performance does not guarantee future results . You can lose money, includingloss of pr incipal , by invest ing in this fund. Investors should careful ly consider investment objectives, r isks , charges andexpenses. This and other important information is contained in the fund prospectuses and summary prospectuses, which can beobtained from www.massmutualfunds.com and should be read careful ly before invest ing. A l ist of the Fund’s holdings can alsobe obtained from www.massmutualfunds.com. Current performance may be lower or higher than return data quoted herein. Formore current information, including month-end performance, please cal l 1-866-444-2601. You cannot invest directly in an index.

TICKER: MGFSX Fund Inception: 12/31/2004 Morningstar Category: World Stock

Quarter to Date:

Top 5 Contributors F u n dW e i g h t

AbsoluteReturn*

Portfol ioContr ibut ion

Airbus SE 3.74 37.93 1.28

Intuit Inc 3.03 33.10 0.95

LVMH Moet Hennessy LouisVuitton SE 3.44 24.74 0.86

Alphabet Inc A 6.59 12.63 0.86

Facebook Inc A 2.88 27.16 0.72

Top 5 Detractors F u n dW e i g h t

AbsoluteReturn*

Portfol ioContr ibut ion

Biogen Inc 0.86 -21.45 -0.17

Newell Brands Inc 0.83 -16.33 -0.15

Bayerische Motoren WerkeAG Participating Preferre 1.46 -7.31 -0.12

Suzuki Motor Corp 0.90 -12.15 -0.11

Sarepta Therapeutics Inc 0.14 -14.89 -0.08

Year to Date:

Top 5 Contributors F u n dW e i g h t

AbsoluteReturn*

Portfol ioContr ibut ion

Airbus SE 3.74 37.93 1.28

Intuit Inc 3.03 33.10 0.95

LVMH Moet Hennessy LouisVuitton SE 3.44 24.74 0.86

Alphabet Inc A 6.59 12.63 0.86

Facebook Inc A 2.88 27.16 0.72

Top 5 Detractors F u n dW e i g h t

AbsoluteReturn*

Portfol ioContr ibut ion

Biogen Inc 0.86 -21.45 -0.17

Newell Brands Inc 0.83 -16.33 -0.15

Bayerische Motoren WerkeAG Participating Preferre 1.46 -7.31 -0.12

Suzuki Motor Corp 0.90 -12.15 -0.11

Sarepta Therapeutics Inc 0.14 -14.89 -0.08

RS9093b 418 RS-45379-03

Portfolio Holdings:

Fund Weightings are shown as an average for the time period.*Absolute Return is the return that an asset achieves over a certain period of time. This measure looks at the appreciation or depreciation (expressed as apercentage) that a holding achieves over a given period of time.For a complete listing of fund holdings, visit massmutualfunds.com or please call 1-866-444-2601. The mention of individual stocks and other securities inthis document does not constitute investment advice.

© 2019 Massachusetts Mutual Life Insurance Company (MassMutual), Springfield, MA. All rights reserved. www.massmutual.com Principal Underwriter:MML Distributors, LLC. (MMLD) Member FINRA and SIPC (www.FINRA.org and www.SIPC.org) MMLD is a subsidiary of Massachusetts Mutual LifeInsurance Company, 100 Bright Meadow Blvd., Enfield, CT 06082. Investment advisory services provided to the Funds by MML Investment Advisers, LLC.

MassMutual Premier Global Fund

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