Mutual Fund Summary Prospectus (497k)


		Summary Prospectus February 3, 2014, Revised as of April 1, 2014

MassMutual Premier Funds

MassMutual Premier Main Street Fund

Ticker: Class I–MSZIX, Class R5–MMSSX , Service Class–MMSYX, Administrative Class–MMSLX,

Class A–MSSAX, Class R4–MSSRX , Class R3–MMSNX

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus and other information about the Fund online at www.massmutual.com/funds. You can also get this information at no cost by calling 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.

INVESTMENT OBJECTIVE

The Fund seeks a high total return.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Class I

Class R5

Service
Class

Admini-
strative
Class

Class A

Class R4

Class R3

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

None

5.75%

None

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)


	Class I	Class R5	Service Class	Admini- strative Class	Class A	Class R4	Class R3
Management Fees ⁽¹⁾	.55%	.55%	.55%	.55%	.55%	.55%	.55%
Distribution and Service (Rule 12b-1) Fees	None	None	None	None	.25%	.25%	.50%
Other Expenses ⁽¹⁾	.09%	.19%	.29%	.39%	.39%	.29%	.29%
Total Annual Fund Operating Expenses	.64%	.74%	.84%	.94%	1.19%	1.09%	1.34%

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Management Fees and Other Expenses have been restated to reflect current fees.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:


	1 Year		3 Years		5 Years		10 Years
Class I	$	65	$	205	$	357	$	798
Class R5	$	76	$	237	$	411	$	918
Service Class	$	86	$	268	$	466	$	1,037
Administrative Class	$	96	$	300	$	520	$	1,155
Class A	$	689	$	931	$	1,192	$	1,935
Class R4	$	111	$	347	$	601	$	1,329
Class R3	$	136	$	425	$	734	$	1,613

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Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 43% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common stocks of U.S. companies of different capitalization ranges. The Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), currently focuses on “large capitalization” issuers, which are considered to be companies with market capitalizations at the time of purchase within the market capitalization range of companies included within the Russell 1000 ^® Index (as of December 31, 2013, $1.14 billion to $504.48 billion), although it may purchase stocks of companies with any market capitalization. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities. The Fund generally will not invest more than 15% of its total assets in foreign securities. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically uses fundamental research and quantitative models to select securities for the Fund’s portfolio, which is comprised of both growth and value stocks. While the process may change over time or vary in particular cases, in general the selection process currently uses:

a fundamental approach in analyzing issuers based on factors such as a company’s financial performance and prospects, industry position, and business model and management strength. OFI Global may also consider industry outlook, market trends and general economic conditions.

quantitative models to rank securities within each sector to identify potential buy and sell candidates for further fundamental analysis. A number of company-specific factors are analyzed in constructing the models, including valuation, fundamentals and momentum.

The portfolio is constructed and regularly monitored based upon several analytical tools, including quantitative investment models.

The Fund aims to maintain a broadly diversified portfolio across all major economic sectors by applying investment parameters for both sector and position size. OFI Global may consider selling a security if, for example, in its judgment, a stock’s price is approaching its target, a company’s competitive position deteriorates, it believes that a company’s management is executing strategy poorly, or more attractive alternative investment ideas have been identified.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities 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 the 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.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and

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unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539 .

Annual Performance

Class R5 Shares

LOGO

Highest

Quarter:

2Q ’09,

18.61%

Lowest

Quarter:

4Q ’08,

-22.19%

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class R5 only. After-tax returns for other classes will vary.

Average Annual Total Returns

(For the periods ended December 31, 2013)


		One Year		Five Years		Since Inception (12/31/04)
Class R5	Return Before Taxes		31.77%		18.12%		6.72%
	Return After Taxes on Distributions		31.50%		17.92%		6.03%

	Return After Taxes on Distributions and Sale of Fund Shares		18.20%		14.77%		5.32%

Class I	Return Before Taxes		31.77%		18.12%		6.72%
Service Class	Return Before Taxes		31.67%		18.11%		6.61%
Administrative Class	Return Before Taxes		31.52%		17.91%		6.48%
Class A	Return Before Taxes		23.72%		16.22%		5.51%
Class R4	Return Before Taxes		31.32%		17.71%		6.29%
Class R3	Return Before Taxes		30.81%		17.24%		5.88%
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)			32.39%		17.94%		7.01%

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MANAGEMENT

Investment Adviser: MML Investment Advisers, LLC

Subadviser: OFI Global Institutional, Inc.

Portfolio Managers:

Manind Govil is a portfolio manager with OFI Global. He has managed the Fund since May 2009.

Paul Larson is a portfolio manager with OFI Global. He has managed the Fund since February 2014.

Benjamin Ram is a portfolio manager with OFI Global. He has managed the Fund since May 2009.

PURCHASE AND SALE OF FUND SHARES

Shares of the Fund are generally available to retirement plans, other institutional investors, and individual retirement accounts. Fund shares are redeemable on any business day by written request, telephone or internet (available to certain customers).

TAX INFORMATION

The Fund intends to make distributions that may be taxed as ordinary income or capital gains, unless you are an investor eligible for preferential tax treatment.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase the Fund through a broker-dealer or other financial intermediary, the intermediary may receive a one-time or continuing payments from the Fund, MML Advisers or its affiliates, or others for the sale of Fund shares or continuing shareholder services provided by the intermediary. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary to recommend the Fund over another investment. You should contact your intermediary to obtain more information about the compensation it may receive in connection with your investment.

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