X0306 4 2022-02-18 0000861884 RELIANCE STEEL & ALUMINUM CO RS 0001408793 Smith William A II 350 SOUTH GRAND AVENUE SUITE 5100 LOS ANGELES CA 90071 0 1 0 0 SVP, General Counsel, Corp Sec Common Stock 2022-02-18 4 A 0 17580 0 A 35414 D Common Stock 2022-02-22 4 S 0 8096 174.93 D 27318 D Common Stock 2022-02-22 4 S 0 6017 176.15 D 21301 D Common Stock 2022-02-22 4 S 0 3467 176.98 D 17834 D Common Stock 416 I Held by Trustee of Reliance Steel & Aluminum Co. Employee Stock Ownership Plan The price reported represents the weighted average sale price of the shares disposed of. The actual sale prices ranged from $174.65 to $175.48. The Reporting Person has provided to the Issuer, and hereby undertakes to provide upon request by the U.S. Securities and Exchange Commission staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. The price reported represents the weighted average sale price of the shares disposed of. The actual sale prices ranged from $175.74 to $176.70. The Reporting Person has provided to the Issuer, and hereby undertakes to provide upon request by the U.S. Securities and Exchange Commission staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. The price reported represents the weighted average sale price of the shares disposed of. The actual sale prices ranged from $176.76 to $177.31. The Reporting Person has provided to the Issuer, and hereby undertakes to provide upon request by the U.S. Securities and Exchange Commission staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. /s/ William A. Smith II 2022-02-23