UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 28, 2012

Wolverine World Wide, Inc.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code: (616) 866-5500

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On September 28, 2012, Wolverine World Wide, Inc. (the “Company”) entered into the First Amendment (the “First Amendment”) to its Credit Agreement dated as of July 31, 2012 (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent and as a lender, J.P. Morgan Europe Limited, as foreign currency agent, Wells Fargo Bank, National Association, as syndication agent and as a lender, Fifth Third Bank, as documentation agent and as a lender, PNC Bank, National Association, as documentation agent and as a lender and the other lenders party thereto. A summary of the terms of the Credit Agreement may be found in the Company’s Current Report on Form 8-K filed on August 1, 2012, which summary is incorporated herein by reference.

The First Amendment modifies certain defined terms and amends Section 4.1(a) of the Credit Agreement to, among other things, permit the Company to issue its $375 million aggregate principal amount of 6.125% Senior Notes due 2020 prior to the consummation of its previously announced acquisition of the Performance + Lifestyle Group of Collective Brands, Inc. The foregoing description of the First Amendment is qualified in its entirety by reference to the terms and conditions of the First Amendment attached hereto as Exhibit 10.1.

Forward-Looking Statements

This report contains forward-looking statements. In addition, words such as “estimates,” “anticipates,” “believes,” “forecasts,” “plans,” “predicts,” “projects,” “is likely,” “expects,” “intends,” “should,” “will,” variations of such words and similar expressions are intended to identify forward-looking statements. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions (“Risk Factors”) that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence. Therefore, actual results and outcomes may materially differ from what may be expressed or forecasted in such forward-looking statements. Risk Factors include, among others: the possibility that the acquisition of the Performance + Lifestyle Group business (the “PLG Business”) of Collective Brands, Inc. does not close; the Company’s ability to realize the benefits of the acquisition of the PLG Business on a timely basis or at all; the Company’s ability to combine its businesses and the

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PLG Business successfully or in a timely and cost-efficient manner; failure to obtain any required financing on favorable terms; the degree of business disruption relating to the acquisition of the PLG Business; the Company’s ability to successfully develop its brands and businesses; changes in interest rates, tax laws, duty structures, tariffs, quotas or applicable assessments in countries of import and export including anti-dumping measures and trade defense actions; changes in consumer preferences, spending patterns, buying patterns or price sensitivity; changes in future pension funding requirements and pension expenses; the ability to secure and protect owned intellectual property or use licensed intellectual property; cancellation of orders for future delivery, or the failure of the Department of Defense to exercise future purchase options, award new contracts or the cancellation of existing contracts by the Department of Defense or other military purchasers; changes in planned customer demand, re-orders or at-once orders; changes in relationships with, including the loss of, significant customers; the availability and pricing of footwear manufacturing capacity; reliance on foreign sourcing; failure of international licensees and distributors to meet sales goals or to make timely payments on amounts owed; disruption of technology systems; regulatory or other changes affecting the supply or price of materials used in manufacturing; the impact of regulatory or legal proceedings and legal compliance risks; the availability of power, labor and resources in key foreign sourcing countries, including China; the cost, availability and management of raw materials, inventories, services and labor for owned and contract manufacturers; the impact of competition and pricing; the impact of restrictions on, or changes in the value of, foreign currencies; the development of new initiatives; the risks of doing business in developing countries, and politically or economically volatile areas; retail buying patterns; consolidation in the retail sector; changes in economic and market conditions, including the financial and credit markets, on the Company, its suppliers and customers; acts and effects of war and terrorism; seasonality and weather; problems affecting the Company’s distribution system, including service interruptions at shipping and receiving ports; the failure to maintain the security of personally identifiable and other information of customers and employees; and additional factors discussed in the Company’s reports filed with the Securities and Exchange Commission and exhibits thereto. Other Risk Factors exist, and new Risk Factors emerge from time to time that may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results. Furthermore, the Company undertakes no obligation to update, amend or clarify forward-looking statements.

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SIGNATURES

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

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EXHIBIT INDEX

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