KOP

SEC source: 0000950170-25-002800 · ownership.xml · derivative · entry 5

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,146

Underlying: Common Stock · 6,565 shares

Expires not disclosed

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F5 · derivative.exercise_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

F5 · derivative.expiration_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

SEC source: 0000950170-25-002800 · ownership.xml · nonDerivative · entry 4

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,126.738

F4 · price: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs and performance share units ("PSUs").

SEC source: 0000950170-25-002800 · ownership.xml · nonDerivative · entry 3

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 151,912.738

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 · shares: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

F3 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-002800 · ownership.xml · nonDerivative · entry 2

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 151,389.738

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: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000950170-25-002800 · ownership.xml · nonDerivative · entry 1

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,243.738

F1 · security: The reporting person was awarded time-based restricted stock units ("RSUs") on January 3, 2025, which will vest in annual installments of 25 percent over four years.

SEC source: 0000950170-25-002817 · ownership.xml · derivative · entry 9

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 904

Underlying: Common Stock · 1,392 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.

F9 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F9 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F9 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F9 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F10 · balance_after: Includes 3 DERs that inadvertently were not previously reported.

SEC source: 0000950170-25-002817 · ownership.xml · derivative · entry 8

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 51,874 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.

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F8 · derivative.exercise_date: Represents previously granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied, as reported in Table II above.

F8 · derivative.expiration_date: Represents previously granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied, as reported in Table II above.

SEC source: 0000950170-25-002817 · ownership.xml · derivative · entry 7

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,293

Underlying: Common Stock · 675 shares

Expires not disclosed

F7 · derivative.exercise_price: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.exercise_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.expiration_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002817 · ownership.xml · derivative · entry 6

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,662

Underlying: Common Stock · 19,936 shares

Expires not disclosed

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F6 · derivative.exercise_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

F6 · derivative.expiration_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

SEC source: 0000950170-25-002817 · ownership.xml · derivative · entry 5

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,874

Underlying: Common Stock · 19,862 shares

Expires not disclosed

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F5 · derivative.exercise_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

F5 · derivative.expiration_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

SEC source: 0000950170-25-002817 · ownership.xml · nonDerivative · entry 4

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 363,798.4007

F4 · price: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs and performance share units ("PSUs").

SEC source: 0000950170-25-002817 · ownership.xml · nonDerivative · entry 3

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 396,407.4007

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 · shares: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

F3 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-002817 · ownership.xml · nonDerivative · entry 2

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 395,015.4007

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: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000950170-25-002817 · ownership.xml · nonDerivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 343,141.4007

F1 · security: The reporting person was awarded time-based restricted stock units ("RSUs") on January 3, 2025, which will vest in annual installments of 25 percent over four years.

SEC source: 0000950170-25-002815 · ownership.xml · derivative · entry 6

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187

Underlying: Common Stock · 27 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.

F7 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002815 · ownership.xml · derivative · entry 5

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 214

Underlying: Common Stock · 12 shares

Expires not disclosed

F6 · derivative.exercise_price: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F6 · derivative.exercise_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F6 · derivative.expiration_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002815 · ownership.xml · derivative · entry 4

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,575

Underlying: Common Stock · 1,055 shares

Expires not disclosed

F4 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F5 · derivative.exercise_date: On January 4, 2023, the reporting person was granted performance share units ("PSUs") for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

F5 · derivative.expiration_date: On January 4, 2023, the reporting person was granted performance share units ("PSUs") for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

SEC source: 0000950170-25-002815 · ownership.xml · nonDerivative · entry 3

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,515

F3 · price: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs.

SEC source: 0000950170-25-002815 · ownership.xml · nonDerivative · entry 2

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,882

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 · shares: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

F2 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-002815 · ownership.xml · nonDerivative · entry 1

Lucas Stephen G · CIK 0001919175 · SVP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,855

F1 · security: The reporting person was awarded time-based restricted stock units ("RSUs") on January 3, 2025, which will vest in annual installments of 25 percent over four years.

SEC source: 0000950170-25-002806 · ownership.xml · derivative · entry 9

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59

Underlying: Common Stock · 76 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.

F10 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F10 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F10 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F10 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002806 · ownership.xml · derivative · entry 8

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,340 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: Restricted stock units convert into common stock on a one-for-one basis.

F9 · derivative.exercise_date: Represents previously granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied, as reported in Table II above.

F9 · derivative.expiration_date: Represents previously granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied, as reported in Table II above.

SEC source: 0000950170-25-002806 · ownership.xml · derivative · entry 7

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 135

Underlying: Common Stock · 16 shares

Expires not disclosed

F8 · derivative.exercise_price: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F8 · derivative.exercise_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F8 · derivative.expiration_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002806 · ownership.xml · derivative · entry 6

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,575

Underlying: Common Stock · 645 shares

Expires not disclosed

F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F7 · derivative.exercise_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

F7 · derivative.expiration_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

SEC source: 0000950170-25-002806 · ownership.xml · derivative · entry 5

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,340

Underlying: Common Stock · 513 shares

Expires not disclosed

F3 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F6 · derivative.exercise_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

F6 · derivative.expiration_date: On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2022 through December 31, 2024 have been satisfied.

SEC source: 0000950170-25-002806 · ownership.xml · nonDerivative · entry 4

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,854.366

F5 · price: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs and performance share units ("PSUs").

SEC source: 0000950170-25-002806 · ownership.xml · nonDerivative · entry 3

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,178.366

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.

F4 · shares: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

F4 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-002806 · ownership.xml · nonDerivative · entry 2

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,102.366

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 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000950170-25-002806 · ownership.xml · nonDerivative · entry 1

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,762.366

F1 · security: The reporting person was awarded time-based restricted stock units ("RSUs") on January 3, 2025, which will vest in annual installments of 25 percent over four years.

F2 · balance_after: Includes 306 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on March 28, 2024, June 28, 2024, and September 30, 2024. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0000950170-25-002798 · ownership.xml · derivative · entry 6

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56

Underlying: Common Stock · 11 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.

F7 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F7 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2023 and January 4, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002798 · ownership.xml · derivative · entry 5

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67

Underlying: Common Stock · 5 shares

Expires not disclosed

F6 · derivative.exercise_price: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F6 · derivative.exercise_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F6 · derivative.expiration_date: The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-002798 · ownership.xml · derivative · entry 4

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,172

Underlying: Common Stock · 480 shares

Expires not disclosed

F4 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F5 · derivative.exercise_date: On January 4, 2023, the reporting person was granted performance share units ("PSUs") for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

F5 · derivative.expiration_date: On January 4, 2023, the reporting person was granted performance share units ("PSUs") for which the performance criteria for the two-year performance period from January 1, 2023 through December 31, 2024 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

SEC source: 0000950170-25-002798 · ownership.xml · nonDerivative · entry 3

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,736

F3 · price: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of RSUs.

SEC source: 0000950170-25-002798 · ownership.xml · nonDerivative · entry 2

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,318

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 · shares: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

F2 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-002798 · ownership.xml · nonDerivative · entry 1

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,307

F1 · security: The reporting person was awarded time-based restricted stock units ("RSUs") on January 3, 2025, which will vest in annual installments of 25 percent over four years.

SEC source: 0000950170-24-137404 · ownership.xml · derivative · entry 1

Feng Xudong · CIK 0001463649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156.783

Underlying: Common Stock · 20.815 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based restricted stock units ("RSUs") credited to the reporting person with respect to deferred compensation. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

F2 · derivative.expiration_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

SEC source: 0000950170-24-137392 · ownership.xml · derivative · entry 1

WILKERSON SONJA MICHELLE · CIK 0001245155 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88.615

Underlying: Common Stock · 9.399 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based restricted stock units ("RSUs") credited to the reporting person with respect to deferred compensation. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

F2 · derivative.expiration_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

SEC source: 0000950170-24-137397 · ownership.xml · derivative · entry 1

MOTLEY DAVID L · CIK 0001584601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128.834

Underlying: Common Stock · 16.963 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based restricted stock units ("RSUs") credited to the reporting person with respect to deferred compensation. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

F2 · derivative.expiration_date: Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

SEC source: 0000950170-24-137920 · ownership.xml · derivative · entry 1

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 245

Underlying: Common Stock · 115 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 73 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 42 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 73 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 42 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 73 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 42 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137914 · ownership.xml · derivative · entry 1

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149

Underlying: Common Stock · 69 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 62 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 7 DERs accrued with respect to PSUs granted on January 4, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 62 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 7 DERs accrued with respect to PSUs granted on January 4, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 62 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 7 DERs accrued with respect to PSUs granted on January 4, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137944 · ownership.xml · derivative · entry 1

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 262

Underlying: Common Stock · 121 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 75 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 46 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 75 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 46 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 75 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 46 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137948 · ownership.xml · derivative · entry 1

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 628

Underlying: Common Stock · 304 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 195 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 109 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 195 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 109 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 195 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 109 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137928 · ownership.xml · derivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,618

Underlying: Common Stock · 701 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 290 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 411 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 290 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 411 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 290 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 411 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137954 · ownership.xml · derivative · entry 1

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62

Underlying: Common Stock · 33 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 29 DERs accrued with respect to RSUs granted on June 13, 2022, January 4, 2023, and January 4, 2024, and 4 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 29 DERs accrued with respect to RSUs granted on June 13, 2022, January 4, 2023, and January 4, 2024, and 4 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 29 DERs accrued with respect to RSUs granted on June 13, 2022, January 4, 2023, and January 4, 2024, and 4 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137937 · ownership.xml · derivative · entry 1

Skrovanek Daniel J · CIK 0001915043 · VP, Growth and Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 119

Underlying: Common Stock · 53 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 42 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 11 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 42 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 11 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 42 DERs accrued with respect to RSUs granted on January 4, 2021, January 4, 2022, January 4, 2023, and January 4, 2024, and 11 DERs accrued with respect to PSUs granted on January 4, 2022 and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-137933 · ownership.xml · derivative · entry 1

Lucas Stephen G · CIK 0001919175 · VP, Culture and Engagement

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 202

Underlying: Common Stock · 98 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 88 DERs accrued with respect to RSUs granted on April 11, 2022, January 4, 2023, and January 4, 2024, and 10 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 88 DERs accrued with respect to RSUs granted on April 11, 2022, January 4, 2023, and January 4, 2024, and 10 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights ("DERs") accrued with respect to additional time-based and performance-based restricted stock units ("RSUs" and "PSUs", respectively) credited to the reporting person. Of this total, 88 DERs accrued with respect to RSUs granted on April 11, 2022, January 4, 2023, and January 4, 2024, and 10 DERs accrued with respect to PSUs granted on January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-129292 · ownership.xml · nonDerivative · entry 1

Tritch Stephen R · CIK 0001463204 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,737

SEC source: 0000950170-24-129276 · ownership.xml · derivative · entry 5

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires 2025-03-03

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 · derivative.exercise_date: Stock options vested in annual installments of 25 percent over four years.

SEC source: 0000950170-24-129276 · ownership.xml · nonDerivative · entry 4

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 314,325.4007

SEC source: 0000950170-24-129276 · ownership.xml · nonDerivative · entry 3

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 314,352.4007

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.92 to $37.56, inclusive. The reporting person undertakes to provide to the Securities and Exchange Commission, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.