X0306 4 2018-03-31 0 0001481582 Ryerson Holding Corp RYI 0001627959 Silver Mark S. C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 EVP, General Counsel & Sec'y Common Stock, (par value $0.01 per share) 2018-03-31 4 M 0 2200 0 A 15220 D Common Stock, (par value $0.01 per share) 2018-03-31 4 M 0 2200 0 A 17420 D Restricted Stock Units 2018-03-31 4 M 0 2200 0 D Common Stock 2200 2200 D Restricted Stock Units 2018-03-31 4 M 0 2200 0 D Common Stock 2200 4400 D Restricted Stock Units 2018-03-31 4 A 0 7425 0 A Common Stock 7425 7425 D Shares received upon the vesting of restricted stock units. Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation. On March 31, 2016, the reporting person was granted 6,600 restricted stock units, of which 2,200 vested on March 31, 2017 and 2,200 vested on March 31, 2018. The remaining 2,200 unvested restricted stock units will vest on March 31, 2019. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. The restricted stock units reported as disposed herein were settled for shares of common stock of Ryerson Holding Corporation. On March 31, 2017, the reporting person was granted 6,600 restricted stock units, of which 2,200 vested on March 31, 2018. Of the remaining unvested restricted stock units, 2,200 will vest on March 31, 2019 and 2,200 will vest on March 31, 2020. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. On March 31, 2018, the reporting person was granted 7,425 restricted stock units, of which 2,475 will vest on March 31, 2019, 2,475 will vest on March 31, 2020 and 2,475 will vest on March 31, 2021. 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 2018-04-03