X0306 4 2018-08-16 0 0001481582 Ryerson Holding Corp RYI 0001490657 Schnaufer Erich S C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 0 1 0 0 Chief Financial Officer Common Stock par value $0.01 per share 2018-08-17 4 M 0 660 0 A 26605 D Common Stock par value $0.01 per share 2018-08-17 4 A 0 3417 0 A 30022 D Restricted Stock Units 2018-08-16 4 A 0 3417 0 A Common Stock 3417 3417 D Restricted Stock Units 2018-08-17 4 M 0 660 0 D Common Stock 660 0 D Restricted Stock Units 2018-08-17 4 M 0 3417 0 D Common Stock 3417 0 D Shares received upon the vesting of restricted stock units. Represents shares received or that will be received in respect of performance-based restricted stock units granted on August 17, 2015. Each performance-based restricted stock unit became vested on August 17, 2018, which was the later of (i) the third anniversary of the grant date, and (ii) the date the compensation committee certified the achievement of the applicable performance objectives in accordance with the underlying award agreement. The compensation committee certified the achievement of the applicable performance objectives on August 16, 2018. Vested shares will be delivered to the reporting person not later than 60 days following the vesting date. 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, 660 vested on August 17, 2017, and 660 vested 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. /s/ Camilla Rykke Merrick, attorney-in-fact 2018-08-20