X0407 4 2023-03-17 0000861884 RELIANCE STEEL & ALUMINUM CO RS 0001447652 HOFFMAN JAMES DONALD 16100 N. 71ST STREET, SUITE 400 SCOTTSDALE AZ 85254 1 0 0 0 0 Common Stock 2023-03-17 4 G 0 78709 0 D 19680 D Common Stock 2023-03-17 4 G 0 78709 0 A 134042 I Held by Hoff Holdings Limited Partnership Common Stock 1179 I Held by Trustee of Reliance Steel & Aluminum Co. Employee Stock Ownership Plan Common Stock 3669 I Held by Trustee of Reliance Steel & Aluminum Co. 401(k) Plan The Reporting Person transferred these shares for no consideration for estate planning purposes. Hoff Holdings Limited Partnership ("Hoff Holdings") is a limited partnership of which a revocable trust established by the Reporting Person and his spouse is both the sole member of the sole general partner and also a limited partner, and various trusts for the benefit of the Reporting Person's spouse and his adult children are the other limited partners. The Reporting Person disclaims beneficial ownership over the Issuer's common stock held by Hoff Holdings except to the extent of his pecuniary interest therein. /s/ James Donald Hoffman by William A. Smith II as his Attorney-in-Fact 2023-03-21