X0607 3 2026-04-30 1 0001481582 Ryerson Holding Corp RYZ 0001614494 Norment Philip E. false C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true Mr. Philip Norment is associated with Platinum Equity, LLC and its affiliated investment funds. Platinum Equity, LLC manages its affiliated investment funds, including Platinum Equity Investment Holdings, LLC, Platinum Equity Investment Holdings IC (Cayman), LLC, Platinum Equity InvestCo, L.P., Platinum Equity Investment Holdings II, LLC, Platinum Equity Partners II, LLC, and RYPS, LLC, which, along with Platinum Equity, LLC collectively own 3,924,478 shares of common stock of Ryerson Holding Corporation ("Ryerson Holding"). This report does not include any securities of Ryerson Holding that may be deemed beneficially owned by Platinum Equity, LLC or its affiliated investment funds, and Mr. Norment disclaims beneficial ownership of all such securities. This report shall not be deemed an admission that Mr. Norment is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Exhibit List: Exhibit 24 - Power of Attorney /s/ Camilla Rykke Merrick, attorney-in-fact 2026-05-05