Lehner Edward J.

SEC source: 0000899140-26-001075 · form4.xml · derivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,823.36

Underlying: Common Stock · 277.647 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, 2026 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027, March 31, 2028, and March 31, 2029.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2026 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027, March 31, 2028, and March 31, 2029.

SEC source: 0000899140-26-001075 · form4.xml · derivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,388.356

Underlying: Common Stock · 191.428 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, 2025 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027 and March 31, 2028.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027 and March 31, 2028.

SEC source: 0000899140-26-001075 · form4.xml · derivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,153.122

Underlying: Common Stock · 99.175 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, 2024 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of September 17, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027.

SEC source: 0000899140-26-000681 · form4.xml · derivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,545.713

Underlying: Common Stock · 245.713 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, 2026 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027, March 31, 2028, and March 31, 2029.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2026 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027, March 31, 2028, and March 31, 2029.

SEC source: 0000899140-26-000681 · form4.xml · derivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,196.928

Underlying: Common Stock · 169.411 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, 2025 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027 and March 31, 2028.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027 and March 31, 2028.

SEC source: 0000899140-26-000681 · form4.xml · derivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,053.947

Underlying: Common Stock · 87.768 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, 2024 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of June 18, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2027.

SEC source: 0000899140-26-000356 · form4.xml · derivative · entry 9

Lehner Edward J. · CIK 0001614103 · Director · 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, 2026, 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, 2026, 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: 0000899140-26-000356 · form4.xml · derivative · entry 8

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,027.517

Underlying: Common Stock · 12,513 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, 2025, 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, 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.

F9 · derivative.expiration_date: On March 31, 2025, 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, 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.

SEC source: 0000899140-26-000356 · form4.xml · derivative · entry 7

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,966.179

Underlying: Common Stock · 12,965 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, 2024, 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. All 12,100 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.

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, 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.

F7 · 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 and 12,100 vested on the second anniversary of the grant date. All 12,100 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.

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, 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.

SEC source: 0000899140-26-000356 · form4.xml · derivative · entry 6

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,258 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, 2023, 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, 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.

F5 · 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, 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, 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.

SEC source: 0000899140-26-000356 · form4.xml · nonDerivative · entry 5

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645,564.4833

F12 · 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: 0000899140-26-000356 · form4.xml · nonDerivative · entry 4

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 677,564.4833

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, 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.

SEC source: 0000899140-26-000356 · form4.xml · nonDerivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 640,714.4833

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.

SEC source: 0000899140-26-000356 · form4.xml · nonDerivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 628,201.4833

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.

SEC source: 0000899140-26-000356 · form4.xml · nonDerivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 615,236.4833

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.

SEC source: 0000899140-26-000342 · form4.xml · derivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,540.517

Underlying: Common Stock · 346.273 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, 2025 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

SEC source: 0000899140-26-000342 · form4.xml · derivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,931.179

Underlying: Common Stock · 239.189 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, 2024 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

SEC source: 0000899140-26-000342 · form4.xml · derivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,257.021

Underlying: Common Stock · 122.283 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, 2023 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of March 19, 2026. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

SEC source: 0000899140-26-000310 · form4.xml · derivative · entry 4

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,000 shares

Expires 2031-03-31

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.

SEC source: 0000899140-26-000310 · form4.xml · derivative · entry 3

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 3,750 shares

Expires 2031-03-31

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.

SEC source: 0000899140-26-000310 · form4.xml · nonDerivative · entry 2

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 601,978.4833

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.

SEC source: 0000899140-26-000310 · form4.xml · nonDerivative · entry 1

Lehner Edward J. · CIK 0001614103 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 596,978.4833

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.

SEC source: 0000899140-26-000067 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 593,228.4833

F1 · kind: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 28, 2025.

F3 · price: These shares were sold in multiple transactions at an average price of $30.06 per share. 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 at each separate price factored into the average price set forth in this footnote.

SEC source: 0000899140-26-000067 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 652,229.4833

F1 · kind: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 28, 2025.

F2 · price: These shares were sold in multiple transactions at prices between $30.000 and $30.035. 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 at each separate price within the ranges set forth in this footnote.

SEC source: 0000899140-25-001454 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,194.244

Underlying: Common Stock · 267.534 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, 2025 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

SEC source: 0000899140-25-001454 · form4.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,691.99

Underlying: Common Stock · 184.8 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, 2024 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-001454 · form4.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,134.738

Underlying: Common Stock · 94.477 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, 2023 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of December 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

SEC source: 0000899140-25-001131 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,926.71

Underlying: Common Stock · 295.666 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, 2025 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

SEC source: 0000899140-25-001131 · form4.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,507.19

Underlying: Common Stock · 204.232 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, 2024 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-001131 · form4.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,040.261

Underlying: Common Stock · 104.412 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, 2023 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of September 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

SEC source: 0000899140-25-000787 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,631.044

Underlying: Common Stock · 331.044 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, 2025 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

F5 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2025 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026, March 31, 2027 and March 31, 2028.

SEC source: 0000899140-25-000787 · form4.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,302.958

Underlying: Common Stock · 228.669 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, 2024 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

F4 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2024 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026 and March 31, 2027.

SEC source: 0000899140-25-000787 · form4.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,935.849

Underlying: Common Stock · 116.905 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, 2023 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on restricted stock units that were granted on March 31, 2023 and outstanding as of June 18, 2025. These unvested restricted stock units, and the dividend equivalent rights related to such unvested restricted stock units, will vest on March 31, 2026.

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: 0000899140-25-000459 · 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: 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: 0000899140-24-001377 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,325.053

Underlying: Common Stock · 350.317 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: 0000899140-24-001377 · form4.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,441.838

Underlying: Common Stock · 238.786 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.