X0306 4 2017-08-17 0 0001481582 Ryerson Holding Corp RYI 0001700923 Fang See Leong 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) 2017-08-17 4 M 0 660 0 A 18645 D Restricted Stock Units 2017-08-17 4 M 0 660 0 D Common Stock 660 660 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 August 17, 2015, the reporting person was granted 3,480 restricted stock units, of which 1,500 vested on August 31, 2015, 660 vested on August 17, 2016, and 660 vested on August 17, 2017. The remaining 660 unvested restricted stock units vest on August 17, 2018. 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. Camilla Rykke Merrick 2017-08-18