X0306 4 2018-03-31 0 0001481582 Ryerson Holding Corp RYI 0001614103 Lehner Edward J. C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 President & CEO Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 11550 0 A 151940 D Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 10450 0 A 162390 D Restricted Stock Units 2018-03-31 4 M 0 11550 0 D Common Stock 11550 11550 D Restricted Stock Units 2018-03-31 4 M 0 10450 0 D Common Stock 10450 20900 D Restricted Stock Units 2018-03-31 4 A 0 33825 0 A Common Stock 33825 33825 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 34,650 restricted stock units, of which 11,550 vested on March 31, 2017 and 11,550 vested on March 31, 2018. The remaining 11,550 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 31,350 restricted stock units, of which 10,450 vested on March 31, 2018. Of the remaining unvested restricted stock units, 10,450 will vest on March 31, 2019 and 10,450 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 33,825 restricted stock units, of which 11,275 will vest on March 31, 2019, 11,275 will vest on March 31, 2020 and 11,275 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