X0306 4/A 2015-08-31 2015-09-01 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 Restricted Stock Units 2015-08-31 4 M 0 18000 0 D Common Stock 18000 23760 D 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 41,760 restricted stock units, of which 18,000 vested on August 31, 2015. Of the remaining unvested restricted stock units, 7,920 vest on August 17, 2016, 7,920 vest on August 17, 2017 and 7,920 vest on August 17, 2018. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. The purpose of this amendment is to correct the number of shares reported under Column 7 of Table II. The original Form 4, filed September 1, 2015, erroneously reported 41,760 shares under Column 7 of Table II. The restricted stock units reported as disposed herein were settled for shares of common stock of Ryerson Holding Corporation. /s/ Mark S. Silver, attorney-in-fact 2016-08-18