RYZ

SEC source: 0000899140-25-000496 · form4.xml · nonDerivative · entry 2

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,015.3365

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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.

F13 · price: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000496 · form4.xml · nonDerivative · entry 1

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,937.3365

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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.

F13 · price: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 11

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600,000

Underlying: Common Stock · 600,000 shares

Expires not disclosed

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F13 · derivative.exercise_date: On March 31, 2025, the reporting person was granted 600,000 restricted stock units, all of which will vest on the fifth anniversary of the grant date, subject to acceleration upon certain events as set forth in the restricted stock unit agreement. Vested shares will be delivered to the reporting person not later than 60 days following such vesting date.

F13 · derivative.expiration_date: On March 31, 2025, the reporting person was granted 600,000 restricted stock units, all of which will vest on the fifth anniversary of the grant date, subject to acceleration upon certain events as set forth in the restricted stock unit agreement. Vested shares will be delivered to the reporting person not later than 60 days following such vesting date.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 10

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires not disclosed

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F12 · derivative.exercise_date: On March 31, 2025, the reporting person was granted 5,000 restricted stock units, all of which will vest on the third anniversary of the grant date.

F12 · derivative.expiration_date: On March 31, 2025, the reporting person was granted 5,000 restricted stock units, all of which will vest on the third anniversary of the grant date.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 9

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,300

Underlying: Common Stock · 36,300 shares

Expires not disclosed

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F11 · derivative.exercise_date: On March 31, 2025, the reporting person was granted 36,300 restricted stock units, of which 12,100 will vest on the first anniversary of the grant date, 12,100 will vest on the second anniversary of the grant date and 12,100 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.

F11 · derivative.expiration_date: On March 31, 2025, the reporting person was granted 36,300 restricted stock units, of which 12,100 will vest on the first anniversary of the grant date, 12,100 will vest on the second anniversary of the grant date and 12,100 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.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 8

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,074.289

Underlying: Common Stock · 12,537 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F4 · price: The restricted stock units reported as disposed herein were settled for shares of common stock of the Company.

F9 · derivative.exercise_date: On March 31, 2024, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date. Of the remaining unvested restricted stock units, 12,100 will vest on the second anniversary of the grant date and 12,100 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.

F10 · derivative.exercise_date: 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.

F15 · derivative.exercise_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

F9 · derivative.expiration_date: On March 31, 2024, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date. Of the remaining unvested restricted stock units, 12,100 will vest on the second anniversary of the grant date and 12,100 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.

F10 · derivative.expiration_date: 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.

F15 · derivative.expiration_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 7

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,818.944

Underlying: Common Stock · 12,818 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F4 · price: The restricted stock units reported as disposed herein were settled for shares of common stock of the Company.

F7 · derivative.exercise_date: On March 31, 2023, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date and 12,100 vested on the second anniversary of the grant date. Of the remaining unvested restricted stock units, 12,100 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.

F8 · derivative.exercise_date: 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.

F15 · derivative.exercise_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

F7 · derivative.expiration_date: On March 31, 2023, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date and 12,100 vested on the second anniversary of the grant date. Of the remaining unvested restricted stock units, 12,100 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.

F8 · derivative.expiration_date: 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.

F15 · derivative.expiration_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · derivative · entry 6

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,086 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the Company.

F4 · price: The restricted stock units reported as disposed herein were settled for shares of common stock of the Company.

F5 · derivative.exercise_date: On March 31, 2022, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date, 12,100 vested on the second anniversary of the grant date and 12,100 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.

F6 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with the vesting of underlying restricted stock units that were granted on March 31, 2022. 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.

F15 · derivative.exercise_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

F5 · derivative.expiration_date: On March 31, 2022, the reporting person was granted 36,300 restricted stock units, of which 12,100 vested on the first anniversary of the grant date, 12,100 vested on the second anniversary of the grant date and 12,100 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.

F6 · derivative.expiration_date: Settlement of dividend equivalent rights in connection with the vesting of underlying restricted stock units that were granted on March 31, 2022. 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.

F15 · derivative.expiration_date: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

F16 · balance_after: The number of restricted stock units owned by the reporting person following the reported transaction has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · nonDerivative · entry 5

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 653,229.4833

F14 · shares: 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.

SEC source: 0000899140-25-000494 · form4.xml · nonDerivative · entry 4

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 705,369.4833

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Represents shares received or that will be received in respect of performance-based restricted stock units granted on March 31, 2022. Each performance-based restricted stock unit became vested on March 31, 2025, 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, 2025. Vested shares will be delivered to the reporting person not later than 60 days following the vesting date.

SEC source: 0000899140-25-000494 · form4.xml · nonDerivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 631,669.4833

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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.

F15 · price: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · nonDerivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 619,132.4833

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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.

F15 · price: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000494 · form4.xml · nonDerivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 606,314.4833

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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.

F15 · price: The number of dividend equivalent rights settled in connection with the vesting of underlying restricted stock units has been rounded to a whole number. This reflects a change in the reporting methodology.

SEC source: 0000899140-25-000455 · form4.xml · derivative · entry 3

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,983.617

Underlying: Common Stock · 45.538 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000455 · form4.xml · derivative · entry 2

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,078.605

Underlying: Common Stock · 31.04 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000455 · form4.xml · derivative · entry 1

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,784.322

Underlying: Common Stock · 13.58 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-25-000456 · form4.xml · derivative · entry 3

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,548.021

Underlying: Common Stock · 65.054 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000456 · form4.xml · derivative · entry 2

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,826.579

Underlying: Common Stock · 44.343 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000456 · form4.xml · derivative · entry 1

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,676.482

Underlying: Common Stock · 20.369 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-25-000459 · form4.xml · derivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,611.289

Underlying: Common Stock · 286.236 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000459 · form4.xml · derivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,636.944

Underlying: Common Stock · 195.106 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000459 · form4.xml · derivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,085.014

Underlying: Common Stock · 99.582 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-25-000458 · form4.xml · derivative · entry 3

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,967.231

Underlying: Common Stock · 91.075 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000458 · form4.xml · derivative · entry 2

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,157.21

Underlying: Common Stock · 62.08 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000458 · form4.xml · derivative · entry 1

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,163.415

Underlying: Common Stock · 31.686 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-25-000457 · form4.xml · derivative · entry 3

Orth John E · CIK 0001764564 · EVP, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,983.617

Underlying: Common Stock · 45.538 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000457 · form4.xml · derivative · entry 2

Orth John E · CIK 0001764564 · EVP, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,078.605

Underlying: Common Stock · 31.04 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000457 · form4.xml · derivative · entry 1

Orth John E · CIK 0001764564 · EVP, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,784.322

Underlying: Common Stock · 13.58 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-25-000454 · form4.xml · derivative · entry 3

Sundarrajan Alagu · CIK 0001848292 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,983.617

Underlying: Common Stock · 45.538 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000454 · form4.xml · derivative · entry 2

Sundarrajan Alagu · CIK 0001848292 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,078.605

Underlying: Common Stock · 31.04 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-25-000454 · form4.xml · derivative · entry 1

Sundarrajan Alagu · CIK 0001848292 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,784.322

Underlying: Common Stock · 13.58 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of March 20, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0001614103-25-000001 · primary_doc.xml · nonDerivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 593,228.4833

F1 · price: These shares were sold at a price of $24.79. The reporting person undertakes to provide Ryerson Holding Corporation, any security holder of Ryerson Holding Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold.

SEC source: 0000899140-25-000367 · form4.xml · nonDerivative · entry 1

Claussen James J · CIK 0001841035 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,773.3365

F1 · price: These shares were sold in multiple transactions at prices ranging from $25.30 to $25.34. The reporting person undertakes to provide Ryerson Holding Corporation, any security holder of Ryerson Holding Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold.

SEC source: 0000899140-25-000015 · form4.xml · nonDerivative · entry 1

Leggio Karen Marie · CIK 0002021777 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,368

F1 · shares: Reflects compensation in the form of equity received pursuant to Ryerson's Director Compensation Program. The award vested in full on the grant date.

SEC source: 0000899140-25-000014 · form4.xml · nonDerivative · entry 1

CALHOUN KIRK K · CIK 0001203721 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,672

F1 · shares: Reflects compensation in the form of equity received pursuant to Ryerson's Director Compensation Program. The award vested in full on the grant date.

SEC source: 0000899140-25-000013 · form4.xml · nonDerivative · entry 1

CARRUTHERS COURT D · CIK 0001422164 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,172

F1 · shares: Reflects compensation in the form of equity received pursuant to Ryerson's Director Compensation Program. The award vested in full on the grant date.

SEC source: 0000899140-25-000012 · form4.xml · nonDerivative · entry 1

Kumbier Michelle · CIK 0001640036 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,241

F1 · shares: Reflects compensation in the form of equity received pursuant to Ryerson's Director Compensation Program. The award vested in full on the grant date.

SEC source: 0000899140-25-000011 · form4.xml · nonDerivative · entry 1

Larson Stephen P. · CIK 0001624556 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,848

F1 · shares: Reflects compensation in the form of equity received pursuant to Ryerson's Director Compensation Program. The award vested in full on the grant date.

SEC source: 0000899140-24-001380 · form4.xml · derivative · entry 3

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,938.079

Underlying: Common Stock · 55.733 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-24-001380 · form4.xml · derivative · entry 2

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,047.565

Underlying: Common Stock · 37.989 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-24-001380 · form4.xml · derivative · entry 1

Kannan Molly D · CIK 0001799091 · CAO & Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770.742

Underlying: Common Stock · 16.62 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-24-001378 · form4.xml · derivative · entry 4

Burbach Michael · CIK 0001628783 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,782.967

Underlying: Common Stock · 3,300 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F6 · derivative.exercise_date: On December 19, 2024, the Reporting Person was granted 3,300 restricted stock units, of which 1,100 will vest on the first anniversary of the grant date, 1,100 will vest on the second anniversary of the grant date and 1,100 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.

F6 · derivative.expiration_date: On December 19, 2024, the Reporting Person was granted 3,300 restricted stock units, of which 1,100 will vest on the first anniversary of the grant date, 1,100 will vest on the second anniversary of the grant date and 1,100 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.

SEC source: 0000899140-24-001378 · form4.xml · derivative · entry 3

Burbach Michael · CIK 0001628783 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,482.967

Underlying: Common Stock · 79.618 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-24-001378 · form4.xml · derivative · entry 2

Burbach Michael · CIK 0001628783 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,095.13

Underlying: Common Stock · 75.978 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-24-001378 · form4.xml · derivative · entry 1

Burbach Michael · CIK 0001628783 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,131.729

Underlying: Common Stock · 38.779 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-24-001382 · form4.xml · derivative · entry 3

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,482.967

Underlying: Common Stock · 79.618 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-24-001382 · form4.xml · derivative · entry 2

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,782.236

Underlying: Common Stock · 54.27 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

SEC source: 0000899140-24-001382 · form4.xml · derivative · entry 1

Silver Mark S. · CIK 0001627959 · EVP, GC & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,656.113

Underlying: Common Stock · 24.93 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2022 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025.

SEC source: 0000899140-24-001383 · form4.xml · derivative · entry 3

Sundarrajan Alagu · CIK 0001848292 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,938.079

Underlying: Common Stock · 55.733 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F5 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025, March 31, 2026 and March 31, 2027.

SEC source: 0000899140-24-001383 · form4.xml · derivative · entry 2

Sundarrajan Alagu · CIK 0001848292 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,047.565

Underlying: Common Stock · 37.989 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation (the "Company").

F2 · shares: 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.

F4 · derivative.exercise_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 19, 2024. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2025 and March 31, 2026.