X0306 4 2017-08-17 0 0001481582 Ryerson Holding Corp RYI 0001491160 Richardson Kevin D C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 President - South East Region Common Stock (par value $0.01 per share) 2017-08-17 4 M 0 2200 0 A 70950 D Common Stock (par value $0.01 per share) 2017-08-18 4 P 0 2000 7.95 A 72950 D Restricted Stock Units 2017-08-17 4 M 0 2200 0 D Common Stock 2200 2200 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 11,600 restricted stock units, of which 5,000 vested on August 31, 2015, 2,200 vested on August 17, 2016, and 2,200 vested on August 17, 2017. The remaining 2,200 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