X0609 4 2026-05-13 0001481582 Ryerson Holding Corp RYZ 0001799091 Kannan Molly D false C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true CAO & Corporate Controller false Common Stock (par value $0.01 per share) 2026-05-13 4 S 0 2500 26.1822 D 28636.4636 D These shares were sold in multiple transactions at prices between $26.180 and $26.235. 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 at each separate price within the ranges set forth in this footnote. /s/ Camilla Rykke Merrick, attorney-in-fact 2026-05-15