X0306 4 2021-09-16 0 0001481582 Ryerson Holding Corp RYI 0001799091 Kannan Molly D 227 W MONROE ST 27TH FLOOR CHICAGO IL 60606 0 1 0 0 Corporate Controller & CAO Restricted Stock Units 2021-09-16 4 A 0 2.9491 0 A Common Stock 2.9491 827.9491 D Restricted Stock Units 2021-09-16 4 A 0 7.8642 0 A Common Stock 7.8642 2207.8642 D Restricted Stock Units 2021-09-16 4 A 0 17.6943 0 A Common Stock 17.6943 4967.6943 D Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company"). Represents dividend equivalent rights that accrued on the underlying award of restricted stock units. Dividend equivalent rights accrue when and as dividends are paid on the common shares underlying the applicable restricted share units and vest proportionately with and are subject to settlement and expiration upon the same terms as the restricted stock units to which they relate. The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2019 and outstanding as of September 16, 2021. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2022. The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2020 and outstanding as of September 16, 2021. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2022 and March 31, 2023. The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2021 and outstanding as of September 16, 2021. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2022, March 31, 2023 and March 31, 2024. Camilla Rykke Merrick 2021-09-20