X0609 4 2026-03-31 0001481582 Ryerson Holding Corp RYZ 0001255662 MARABITO RICHARD T false C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true true President & COO false Restricted Stock Units 2026-03-31 4 A 0 16147.56 0 A Common Stock 16147.56 16147.56 D Each restricted stock unit represents a contingent right to receive one share of common stock of the Company. On March 31, 2026, the reporting person was granted 16,147.56 restricted stock units, of which 5,382.52 will vest on the first anniversary of the grant date, 5,382.52 will vest on the second anniversary of the grant date and 5,382.52 will vest on the third anniversary of the grant date. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. /s/ Camilla Rykke Merrick, attorney-in-fact 2026-04-02