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): June 28, 2021

RELIANCE STEEL & ALUMINUM CO.

(Exact name of registrant as specified in its charter)

350 South Grand Avenue, Suite 5100

Los Angeles, CA 90071

(Address of Principal Executive Offices) (Zip Code)

(213) 687-7700

(Registrant’s telephone number, including area code)

Not applicable.

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

Securities registered pursuant to Section 12(b) of the Act:

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:

¨            Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨            Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨            Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨            Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   ¨

Retirement of William K. Sales, Jr.

On June 28, 2021, William K. Sales, Jr., Executive Vice President, Operations of Reliance Steel & Aluminum Co. (the “Company”) informed the Company that he will be retiring effective January 31, 2022. In advance of his retirement, Mr. Sales will transition from his current position to the role of Special Advisor, effective July 1, 2021. As Special Advisor, Mr. Sales will report directly to James D. Hoffman, the Company’s Chief Executive Officer, and help facilitate the transition of his role as well as support other special projects.

A copy of the press release issued by the Company announcing Mr. Sales’s retirement and other executive leadership changes is attached hereto as Exhibit 99.1 to this Current Report on Form 8-K. Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities under that Section and shall not be deemed to be incorporated by reference into any filing of the Registrant under the Securities Act of 1933 or the Exchange Act.

SIGNATURE

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.