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): August 11, 2014

REXNORD CORPORATION

(Exact name of registrant as specified in its charter)

(414) 643-3739

(Registrant’s telephone number, including area code)

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 August 11, 2014, Rexnord Corporation (the “Company”) entered into an Underwriting Agreement (the “Underwriting Agreement”) by and among the Company, certain funds affiliated with Apollo Global Management, LLC (collectively with its subsidiaries, “Apollo”) and Deutsche Bank Securities Inc. (the “Underwriter”), for the sale of 10,000,000 shares of common stock, par value $0.01 per share, of the Company (“Common Stock”) by Apollo. The offering was made under the Company’s registration statement on Form S-3ASR (File No. 333-193610) filed with the Securities and Exchange Commission (the “Registration Statement”). The offering closed on August 15, 2014. Pursuant to the terms of the Underwriting Agreement, the Company and Apollo have agreed to indemnify the Underwriter against certain liabilities, including liabilities under the Securities Act of 1933, as amended, or to contribute to payments the Underwriter may be required to make because of any of those liabilities.

The Company did not sell any shares in the offering and did not receive any proceeds from the sale of shares of Common Stock by Apollo.

The Underwriter and its affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. The Underwriter and certain of its affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for the Company, for which they received or will receive customary fees and expenses. The Underwriter and/or certain of its affiliates may have an indirect ownership interest in the Company through various private equity funds, including funds of Apollo and/or its affiliates. The Underwriter or certain of its affiliates are lenders under the Company’s credit agreement.

In the ordinary course of their various business activities, the Underwriter and its affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve securities and/or instruments of the Company. The Underwriter and its affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or instruments and may at any time hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

The summary set forth above is not intended to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is attached hereto as Exhibit 1.1 and incorporated by reference.

(d)    Exhibits

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, Rexnord Corporation has caused this report to be signed on its behalf by the undersigned thereunto authorized this 15th day of August, 2014.

EXHIBIT INDEX