X0609 4 2026-05-29 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 true Common Stock (par value $0.01 per share) 2026-05-29 4 S 0 3000 28.42 D 25636.4636 D These sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026. These shares were sold in multiple transactions at the price of $28.42. 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 2026-06-01