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 26, 2015

FMC CORPORATION

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: 215-299-6000

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

Revolving Credit Agreement Amendment

On August 26, 2015, FMC Corporation (the “Company”) entered into Amendment No. 1 (“Revolving Credit Amendment”) to that certain Amended and Restated Credit Agreement, dated as of October 10, 2014, among the Company, as U.S. Borrower, certain foreign subsidiaries of the Company party thereto, as Euro Borrowers, the lenders (the “Revolving Credit Lenders”) and issuing banks party thereto, Citibank, N.A., as administrative agent, Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers, Bank of America, N.A., as syndication agent, and certain other financial institutions party thereto as co-documentation agents (the “Revolving Credit Agreement”). The Revolving Credit Amendment amends the maximum leverage ratio financial covenant in the Revolving Credit Agreement, as set forth in the Revolving Credit Amendment.

The foregoing description of the Revolving Credit Amendment does not purport to be complete and is qualified in its entirety by reference to the Revolving Credit Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 8-K.

Some of the Revolving Credit Lenders and their affiliates have various relationships with the Company involving the provision of financial services, including cash management, investment banking and trust and leasing services. In addition, the Company has entered into interest rate, foreign exchange and energy derivative arrangements with some of the Revolving Credit Lenders and their affiliates.

Term Loan Agreement Amendment

On August 26, 2015, the Company entered into Amendment No. 1 (“Term Loan Amendment”) to that certain Term Loan Agreement, dated as of October 10, 2014, among the Company, as U.S. Borrower, certain foreign subsidiaries of the Company party thereto, as Euro Borrowers, the lenders party thereto (the “Term Loan Lenders”), Citibank, N.A., as administrative agent, Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers, Bank of America, N.A., as syndication agent, and certain other financial institutions party thereto as co-documentation agents (the “Term Loan Agreement”). The Term Loan Amendment amends the maximum leverage ratio financial covenant in the Term Loan Agreement, as set forth in the Term Loan Amendment.

The foregoing description of the Term Loan Amendment does not purport to be complete and is qualified in its entirety by reference to the Term Loan Amendment, which is filed as Exhibit 10.2 to this Current Report on Form 8-K.

Some of the Term Loan Lenders and their affiliates have various relationships with the Company involving the provision of financial services, including cash management, investment banking and trust and leasing services. In addition, the Company has entered into interest rate, foreign exchange and energy derivative arrangements with some of the Term Loan Lenders and their affiliates.

The information set forth in Item 1.01 of this Current Report on Form 8-K is incorporated by reference into this Item 2.03.

(d) Exhibits.

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 thereunto duly authorized.

EXHIBIT INDEX