X0306 4 2018-03-31 0 0001481582 Ryerson Holding Corp RYI 0001628783 Burbach Michael C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 President, North-West Region Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 2750 0 A 62750 D Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 2750 0 A 65500 D Restricted Stock Units 2018-03-31 4 M 0 2750 0 D Common Stock 2750 2750 D Restricted Stock Units 2018-03-31 4 M 0 2750 0 D Common Stock 2750 5500 D Restricted Stock Units 2018-03-31 4 A 0 8250 0 A Common Stock 8250 8250 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 8,250 restricted stock units, of which 2,750 vested on March 31, 2017 and 2,750 vested on March 31, 2018. The remaining 2,750 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 8,250 restricted stock units, of which 2,750 vested on March 31, 2018. Of the remaining unvested restricted stock units, 2,750 will vest on March 31, 2019 and 2,750 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 8,250 restricted stock units, of which 2,750 will vest on March 31, 2019, 2,750 will vest on March 31, 2020 and 2,750 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