X0609 4 2026-03-31 0001481582 Ryerson Holding Corp RYZ 0001841035 Claussen James J false C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true Executive Vice President & CFO false Common Stock (par value $0.01 per share) 2026-03-31 4 M 0 4219 0 A 78503.3365 D Common Stock (par value $0.01 per share) 2026-03-31 4 M 0 4125 0 A 82628.3365 D Common Stock (par value $0.01 per share) 2026-03-31 4 M 0 4550 0 A 87178.3365 D Common Stock (par value $0.01 per share) 2026-03-31 4 M 0 11725 0 A 98903.3365 D Common Stock (par value $0.01 per share) 2026-03-31 4 F 0 10415 22.48 D 88488.3365 D Restricted Stock Units 2026-03-31 4 M 0 4219 0 D Common Stock 4219 0 D Restricted Stock Units 2026-03-31 4 M 0 4125 0 D Common Stock 4125 4125.881 D Restricted Stock Units 2026-03-31 4 M 0 4550 0 D Common Stock 4550 9101.098 D Restricted Stock Units 2026-03-31 4 A 0 13200 0 A Common Stock 13200 13200 D Represents shares received upon the vesting of restricted stock units and shares received upon the vesting of dividend equivalent rights granted in connection with the quarterly dividends declared by Ryerson Holding Corporation (the "Company"). Dividend equivalent rights are subject to the same terms and conditions, including vesting, as the underlying restricted stock units. Represents shares received or that will be received in respect of performance-based restricted stock units granted on March 31, 2023. Each performance-based restricted stock unit became vested on March 31, 2026, 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 March 31, 2026. 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 the Company. The restricted stock units reported as disposed herein were settled for shares of common stock of the Company. On March 31, 2023, the reporting person was granted 11,550 restricted stock units, of which 3,850 vested on the first anniversary of the grant date, 3,850 vested on the second anniversary of the grant date and 3,850 vested on the third anniversary of the grant date. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. Settlement of dividend equivalent rights in connection with the vesting of underlying restricted stock units that were granted on March 31, 2023. The dividend equivalent rights accrued when and as the Company declared quarterly dividends and vested proportionately with the restricted stock unit to which they related. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. On March 31, 2024, the reporting person was granted 11,550 restricted stock units, of which 3,850 vested on the first anniversary of the grant date and 3,850 vested on the second anniversary of the grant date. All 3,850 of the remaining unvested restricted stock units will vest on the third anniversary of the grant date. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. Settlement of dividend equivalent rights in connection with the vesting of underlying restricted stock units that were granted on March 31, 2024. The dividend equivalent rights accrued when and as the Company declared quarterly dividends and vested proportionately with the restricted stock unit to which they related. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. On March 31, 2025, the reporting person was granted 13,200 restricted stock units, of which 4,400 vested on the first anniversary of the grant date. Of the remaining unvested restricted stock units, 4,400 will vest on the second anniversary of the grant date and 4,400 will vest on the third anniversary of the grant date. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. Settlement of dividend equivalent rights in connection with the vesting of underlying restricted stock units that were granted on March 31, 2025. The dividend equivalent rights accrued when and as the Company declared quarterly dividends and vested proportionately with the restricted stock unit to which they related. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. On March 31, 2026, the reporting person was granted 13,200 restricted stock units, of which 4,400 will vest on the first anniversary of the grant date, 4,400 will vest on the second anniversary of the grant date and 4,400 will vest on the third anniversary of the grant date. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates. Represents shares that have been withheld by the Company to satisfy its income tax and withholding remittance obligations in connection with the net settlement of restricted stock units. /s/ Camilla Rykke Merrick, attorney-in-fact 2026-04-02