UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment No. 1 to 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 19, 2014

LEGGETT & PLATT, INCORPORATED

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code 417-358-8131

N/A

(Former name or former address, if changed since last report.)

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 (see General Instruction A.2. below):

Explanatory Note

Leggett & Platt, Incorporated (the “Company”) is filing this Amendment No. 1 to Form 8-K to update information reported in Item 5.02 of the Current Report on Form 8-K filed September 25, 2014 (the “Original 8-K”) in connection with the entry into an indemnification agreement with Tammy M. Trent, as discussed below. Except for the foregoing, this Amendment No. 1 does not amend the Original 8-K in any way and does not modify or update any other disclosures contained in the Original 8-K, which speaks only as of its original date. This Amendment No. 1 supplements and does not supersede the Original 8-K. Accordingly, this Amendment No. 1 should be read in conjunction with the Original 8-K.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 5, 2015, the Company entered into an indemnification agreement with its newly appointed Vice President and Chief Accounting Officer, Tammy M. Trent. Substantially similar agreements are already in place with the Company’s other directors and executive officers. The form of the indemnification agreement was approved by the Company’s shareholders on May 7, 1986.

Pursuant to the agreements, the Company has agreed to indemnify and hold harmless each director and executive officer against all expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement to the fullest extent permitted or authorized by applicable law. For this purpose, “applicable law” generally means Section 351.355 of the General and Business Corporation Law of the State of Missouri, including any amendments since May 7, 1986, but only to the extent such amendment permits the Company to provide broader indemnification rights. In addition, the Company has agreed to further indemnify and hold harmless each director and executive officer who was or is a party or is threatened to be made a party to any proceeding, including any proceeding by or in the right of the Company, by reason of the fact that the person is or was a director, officer, employee or agent of the Company, or is or was serving at the request or on the behalf of the Company as a director, officer, employee or agent of another enterprise or by reason of anything done or not done by him or her in any such capacities.

However, under these agreements, the Company will not provide indemnification: (i) for amounts indemnified by the Company outside of the agreement or paid pursuant to insurance; (ii) in respect of remuneration paid to the person if determined finally that such remuneration was in violation of law; (iii) on account of any suit for any accounting of profits pursuant to Section 16(b) of the Securities Exchange Act of 1934 or similar provisions of any federal, state or local law; (iv) on account of the person’s conduct which is finally adjudged to have been knowingly fraudulent, deliberately dishonest or willful misconduct; or (v) if a final adjudication shall determine that such indemnification is not lawful.

The indemnification agreement requires the Company, with certain exceptions, to purchase and maintain director and officer insurance. Also, at the request of the director or executive officer, the Company is obligated to advance expenses (including attorneys’ fees) in defending any proceeding. However, if it is determined that the person is not entitled to be indemnified, the person must repay the Company all amounts advanced, or the appropriate portion thereof.

The above disclosure is only a brief description of the indemnification agreement and is qualified in its entirety by the Form of Indemnification Agreement which is attached as Exhibit 10.11 to the Company’s Form 10-K filed on March 28, 2002, and is incorporated herein by reference.

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.

EXHIBIT INDEX