X0306 4 2018-03-31 0 0001481582 Ryerson Holding Corp RYI 0001700923 Fang See Leong C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 EVP Ops, Pres & CEO, Asia Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 825 0 A 19470 D Common Stock (par value $0.01 per share) 2018-03-31 4 M 0 1650 0 A 21120 D Restricted Stock Units 2018-03-31 4 M 0 825 0 D Common Stock 825 825 D Restricted Stock Units 2018-03-31 4 M 0 1650 0 D Common Stock 1650 3300 D Restricted Stock Units 2018-03-31 4 A 0 4950 0 A Common Stock 4950 4950 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 2,475 restricted stock units, of which 825 vested on March 31, 2017 and 825 vested on March 31, 2018. The remaining 825 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 4,950 restricted stock units, of which 1,650 vested on March 31, 2018. Of the remaining unvested restricted stock units, 1,650 will vest on March 31, 2019 and 1,650 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 4,950 restricted stock units, of which 1,650 will vest on March 31, 2019, 1,650 will vest on March 31, 2020 and 1,650 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