KOP

SEC source: 0001450800-26-000002 · wk-form4_1767741215.xml · derivative · entry 5

Sullivan James A. · CIK 0001450800 · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,442

Underlying: Common Stock · 3,074 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, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

F5 · derivative.expiration_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

SEC source: 0001315257-26-000002 · wk-form4_1767740678.xml · derivative · entry 7

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,510

Underlying: Common Stock · 519 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, 2023 and January 3, 2025. 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, 2023 and January 3, 2025. 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, 2023 and January 3, 2025. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0001315257-26-000002 · wk-form4_1767740678.xml · derivative · entry 6

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,360

Underlying: Common Stock · 12,360 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 3, 2025, the reporting person was granted PSUs for which the performance criteria for the one-year performance period from January 1, 2025 through December 31, 2025 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, 2028. If the Company's total shareholder return over the three-year period of January 1, 2025 through December 31, 2027 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 3, 2025, the reporting person was granted PSUs for which the performance criteria for the one-year performance period from January 1, 2025 through December 31, 2025 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, 2028. If the Company's total shareholder return over the three-year period of January 1, 2025 through December 31, 2027 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: 0001315257-26-000002 · wk-form4_1767740678.xml · derivative · entry 5

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,634

Underlying: Common Stock · 15,972 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, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

F5 · derivative.expiration_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

SEC source: 0001919175-26-000002 · wk-form4_1767740884.xml · derivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 258

Underlying: Common Stock · 24 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, 2023 and January 3, 2025. 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, 2023 and January 3, 2025. 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, 2023 and January 3, 2025. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0001919175-26-000002 · wk-form4_1767740884.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 722

Underlying: Common Stock · 722 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 3, 2025, the reporting person was granted PSUs for which the performance criteria for the one-year performance period from January 1, 2025 through December 31, 2025 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, 2028. If the Company's total shareholder return over the three-year period of January 1, 2025 through December 31, 2027 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 3, 2025, the reporting person was granted PSUs for which the performance criteria for the one-year performance period from January 1, 2025 through December 31, 2025 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, 2028. If the Company's total shareholder return over the three-year period of January 1, 2025 through December 31, 2027 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: 0001919175-26-000002 · wk-form4_1767740884.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,421

Underlying: Common Stock · 846 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, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

F5 · derivative.expiration_date: On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2023 through December 31, 2025 have been satisfied.

SEC source: 0002057699-25-000003 · wk-form4_1766012625.xml · derivative · entry 1

Lovalekar Tushar · CIK 0002057699 · VP, Information Technology

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108

Underlying: Common Stock · 67 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, 55 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 12 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, 55 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 12 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, 55 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 12 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: 0001806249-25-000003 · wk-form4_1766013013.xml · derivative · entry 1

Apostolou Stephanie L · CIK 0001806249 · Chief Legal&Sus Officer & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 349

Underlying: Common Stock · 245 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, 208 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 37 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, 208 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 37 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, 208 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 37 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: 0001776180-25-000003 · wk-form4_1766012326.xml · derivative · entry 1

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168

Underlying: Common Stock · 113 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 RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025. 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 restricted stock units ("RSUs") credited to the reporting person with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025. 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 restricted stock units ("RSUs") credited to the reporting person with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0001739998-25-000007 · wk-form4_1766010948.xml · derivative · entry 1

Sandifer Andrew D · CIK 0001739998 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34.064

Underlying: Common Stock · 5.89 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional 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: 0001684691-25-000005 · wk-form4_1766012097.xml · derivative · entry 1

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 328

Underlying: Common Stock · 222 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, 183 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 39 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, 183 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 39 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, 183 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 39 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: 0001463649-25-000005 · wk-form4_1766009295.xml · derivative · entry 1

Feng Xudong · CIK 0001463649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 297.916

Underlying: Common Stock · 33.442 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional 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: 0001450800-25-000004 · wk-form4_1766012860.xml · derivative · entry 1

Sullivan James A. · CIK 0001450800 · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 809

Underlying: Common Stock · 522 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, 420 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025 and 102 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, 420 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025 and 102 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, 420 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025 and 102 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: 0001315257-25-000015 · wk-form4_1766009124.xml · derivative · entry 1

WILKERSON SONJA MICHELLE · CIK 0001245155 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 250.153

Underlying: Common Stock · 28.344 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: 0001229771-25-000003 · wk-form4_1766013128.xml · derivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,991

Underlying: Common Stock · 1,087 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, 552 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 535 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, 552 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 535 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, 552 DERs accrued with respect to RSUs granted on January 4, 2022, January 4, 2023, January 4, 2024, and January 3, 2025, and 535 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: 0001919175-25-000003 · wk-form4_1766012483.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234

Underlying: Common Stock · 169 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, 142 DERs accrued with respect to RSUs granted on January 4, 2023, January 4, 2024, and January 3, 2025, and 27 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, 142 DERs accrued with respect to RSUs granted on January 4, 2023, January 4, 2024, and January 3, 2025, and 27 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, 142 DERs accrued with respect to RSUs granted on January 4, 2023, January 4, 2024, and January 3, 2025, and 27 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: 0001584601-25-000006 · wk-form4_1766011160.xml · derivative · entry 1

MOTLEY DAVID L · CIK 0001584601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 250.151

Underlying: Common Stock · 28.343 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: 0002092070-25-000004 · wk-form4_1762550835.xml · nonDerivative · entry 1

Posadas Laura J · CIK 0002092070 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,240

F1 · security: The reporting person was awarded time-based restricted stock units.

SEC source: 0001739998-25-000005 · wk-form4_1758140264.xml · derivative · entry 1

Sandifer Andrew D · CIK 0001739998 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28.174

Underlying: Common Stock · 5.871 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional 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.

F3 · balance_after: Includes 5.303 DERs that inadvertently were not previously reported.

SEC source: 0001463649-25-000003 · wk-form4_1758139693.xml · derivative · entry 1

Feng Xudong · CIK 0001463649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 264.474

Underlying: Common Stock · 33.338 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional 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.

F3 · balance_after: Includes 30.109 DERs that inadvertently were not previously reported.

SEC source: 0001315257-25-000003 · wk-form4_1758140121.xml · derivative · entry 1

WILKERSON SONJA MICHELLE · CIK 0001245155 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 221.809

Underlying: Common Stock · 28.255 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights ("DERs") accrued with respect to additional restricted stock unites ("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.

F3 · balance_after: Includes 25.518 DERs that inadvertently were not previously reported.

SEC source: 0001584601-25-000004 · wk-form4_1758139919.xml · derivative · entry 1

MOTLEY DAVID L · CIK 0001584601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 221.808

Underlying: Common Stock · 28.254 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.

F3 · balance_after: Includes 25.518 DERs that inadvertently were not previously reported.

SEC source: 0000950170-25-109748 · ownership.xml · nonDerivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 357,308.4007

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.32 to $30.50, 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.

F2 · balance_after: Includes 328 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on June 30, 2025. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0000950170-25-088507 · ownership.xml · nonDerivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 359,428.4007

SEC source: 0000950170-25-086751 · ownership.xml · derivative · entry 3

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27

Underlying: Common Stock · 33 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: These DERs were released in connection with the vesting of RSUs granted on June 13, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · shares: These DERs were released in connection with the vesting of RSUs granted on June 13, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on June 13, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on June 13, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-086751 · ownership.xml · nonDerivative · entry 2

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,951

F2 · acquired: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of time-based restricted stock units ("RSUs").

SEC source: 0000950170-25-086751 · ownership.xml · nonDerivative · entry 1

Washington Kevin · CIK 0001932214 · VP, External Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,769

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-076330 · ownership.xml · nonDerivative · entry 1

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 360,262.4007

F1 · balance_after: Includes 500 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on March 31, 2025. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0000950170-25-068016 · ownership.xml · derivative · entry 1

Sandifer Andrew D · CIK 0001739998 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,857

Underlying: Common Stock · 4,778 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.

F2 · derivative.exercise_date: The RSUs 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: The RSUs 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: 0000950170-25-068006 · ownership.xml · derivative · entry 1

Feng Xudong · CIK 0001463649 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,477.478

Underlying: Common Stock · 4,778 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.

F2 · derivative.exercise_date: The RSUs 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: The RSUs 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: 0000950170-25-068027 · ownership.xml · derivative · entry 1

WILKERSON SONJA MICHELLE · CIK 0001245155 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,696

Underlying: Common Stock · 4,778 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.

F2 · derivative.exercise_date: The RSUs 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: The RSUs 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: 0000950170-25-068045 · ownership.xml · nonDerivative · entry 1

NEUPAVER ALBERT J · CIK 0001190210 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,784

F1 · security: The reporting person was awarded time-based restricted stock units.

SEC source: 0000950170-25-068060 · ownership.xml · nonDerivative · entry 1

MOTLEY DAVID L · CIK 0001584601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,994

F1 · security: The reporting person was awarded time-based restricted stock units.

SEC source: 0000950170-25-068056 · ownership.xml · nonDerivative · entry 1

Vartanian Nishan J. · CIK 0001564614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,334

F1 · security: The reporting person was awarded time-based restricted stock units.

SEC source: 0000950170-25-068034 · ownership.xml · nonDerivative · entry 1

JENSEN TRACI L · CIK 0001533627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,009.104

F1 · security: The reporting person was awarded time-based restricted stock units.

SEC source: 0000950170-25-064701 · ownership.xml · derivative · entry 2

Tritch Stephen R · CIK 0001463204 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17 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: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · shares: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-064701 · ownership.xml · nonDerivative · entry 1

Tritch Stephen R · CIK 0001463204 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,754

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-064562 · ownership.xml · derivative · entry 2

NEUPAVER ALBERT J · CIK 0001190210 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17 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: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · shares: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-064562 · ownership.xml · nonDerivative · entry 1

NEUPAVER ALBERT J · CIK 0001190210 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,006

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-064688 · ownership.xml · derivative · entry 2

TESTONI LOUIS L · CIK 0001576713 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17 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: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · shares: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-064688 · ownership.xml · nonDerivative · entry 1

TESTONI LOUIS L · CIK 0001576713 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,778

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-064578 · ownership.xml · derivative · entry 2

Vartanian Nishan J. · CIK 0001564614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17 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: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · shares: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-064578 · ownership.xml · nonDerivative · entry 1

Vartanian Nishan J. · CIK 0001564614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,556

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-064573 · ownership.xml · derivative · entry 2

JENSEN TRACI L · CIK 0001533627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17 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: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · shares: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F2 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on May 2, 2024. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-064573 · ownership.xml · nonDerivative · entry 1

JENSEN TRACI L · CIK 0001533627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,231.104

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-053731 · ownership.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65

Underlying: Common Stock · 140 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: These DERs were released in connection with the vesting of RSUs granted on April 11, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · shares: These DERs were released in connection with the vesting of RSUs granted on April 11, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on April 11, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F3 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on April 11, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-25-053731 · 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: 26,912

F2 · acquired: Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of time-based restricted stock units ("RSUs").

SEC source: 0000950170-25-053731 · 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: 29,655

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

F1 · price: Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

SEC source: 0000950170-25-045317 · ownership.xml · derivative · entry 1

Sandifer Andrew D · CIK 0001739998 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17

Underlying: Common Stock · 17 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 RSUs granted on May 2, 2024. 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.