X0508 4 2026-01-21 0001481582 Ryerson Holding Corp RYI 0001614103 Lehner Edward J. C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true true President & CEO true Common Stock (par value $0.01 per share) 2026-01-21 4 S 0 1000 30.008 D 652229.4833 D Common Stock (par value $0.01 per share) 2026-01-22 4 S 0 59001 30.06 D 593228.4833 D The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 28, 2025. These shares were sold in multiple transactions at prices between $30.000 and $30.035. 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. These shares were sold in multiple transactions at an average price of $30.06 per share. 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 factored into the average price set forth in this footnote. /s/ Camilla Rykke Merrick, attorney-in-fact 2026-01-23