X0508 4 2025-02-24 0001481582 Ryerson Holding Corp RYI 0001841035 Claussen James J C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true Executive Vice President & CFO false Common Stock (par value $0.01 per share) 2025-02-24 4 S 0 6017 25.3 D 58773.3365 D These shares were sold in multiple transactions at prices ranging from $25.30 to $25.34. The reporting person undertakes to provide Ryerson Holding Corporation, any security holder of Ryerson Holding Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold. /s/ Camilla Rykke Merrick, attorney-in-fact 2025-02-26