X0508 4 2026-02-13 0001481582 Ryerson Holding Corp RYI 0001255662 MARABITO RICHARD T C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO IL 60606 true true President & COO false Common Stock (par value $0.01 per share) 2026-02-13 4 A 0 125292 A 125292 D Restricted Stock Units 2026-02-13 4 A 0 33005 A Common Stock 33005 33005 D Restricted Stock Units 2026-02-13 4 A 0 88101 A Common Stock 88101 88101 D Restricted Stock Units 2026-02-13 4 A 0 14104 A Common Stock 14104 14104 D Restricted Stock Units 2026-02-13 4 A 0 18815 A Common Stock 18815 18815 D Restricted Stock Units 2026-02-13 4 A 0 150496 0 A Common Stock 150496 150496 D The Reporting Person received 125,292 shares of the Issuer's common stock in exchange for 73,249 shares of common stock, without par value, of Olympic Steel, Inc. ("Olympic Steel") in connection with the merger between Olympic Steel and the Issuer (the "Merger") pursuant to the terms of the Agreement and Plan of Merger, dated as of October 28, 2025 (the "Merger Agreement"), by and among the Issuer, Olympic Steel and Crimson MS Corp. In accordance with the Merger Agreement, each share of Olympic Steel's common stock was cancelled and converted into the right to receive 1.7105 shares (the "Exchange Ratio") of the Issuer's common stock, with cash paid in lieu of fractional shares. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. The restricted stock units have fully vested. Vested shares will be delivered to the reporting person upon separation of service. Pursuant to the Merger Agreement, at the effective time, the reporting person's Olympic Steel restricted stock units were assumed and converted into restricted stock units with respect to a number of shares of the Issuer's common stock (rounded down to the nearest whole share) determined by multiplying (i) the number of shares of Olympic Steel common stock subject to the Olympic Steel restricted stock unit immediately prior to the effective time of the Merger by (ii) the Exchange Ratio. The converted restricted stock units will otherwise be subject to the same terms and conditions as were applicable to the Olympic Steel restricted stock units prior to the effective time of the Merger. The Reporting Person received 33,005 restricted stock units of the Issuer in exchange for restricted stock units with respect to 19,296 shares of Olympic Steel's common stock. The Reporting Person received 88,101 restricted stock units of the Issuer in exchange for restricted stock units with respect to 51,506 shares of Olympic Steel's common stock. The restricted stock units will vest on December 31, 2026. Vested shares will be delivered to the reporting person within 90 days following the vesting date. The Reporting Person received 14,104 restricted stock units of the Issuer in exchange for restricted stock units with respect to 8,246 shares of Olympic Steel's common stock. The restricted stock units will vest on December 31, 2027. Vested shares will be delivered to the reporting person within 90 days following the vesting date. The Reporting Person received 18,815 restricted stock units of the Issuer in exchange for restricted stock units with respect to 11,000 shares of Olympic Steel's common stock. The Reporting Person received a one-time sign-on restricted stock unit award in connection with the Merger, which will vest on the third anniversary of the closing date of the Merger. Vested shares will be delivered to the reporting person upon vesting. /s/ Camilla Rykke Merrick, attorney-in-fact 2026-02-13