KOP

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 8

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,657.9136

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 7

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,670.9136

F3 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $55.00 to $55.16 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 price.

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 6

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,880.9136

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

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 5

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,657.9136

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 4

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,682.9136

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 3

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,882.9136

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

SEC source: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 2

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,657.9136

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: 0000950170-24-026216 · ownership.xml · nonDerivative · entry 1

Hyde Leslie S · CIK 0001349675 · SVP, Chief Sustainability Offi

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,102.9136

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: 0000950170-24-026208 · ownership.xml · derivative · entry 16

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,716

Underlying: Common Stock · 5,813 shares

Expires 2029-03-06

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_date: Stock options vested in annual installments of 25 percent over four years.

SEC source: 0000950170-24-026208 · ownership.xml · derivative · entry 15

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 816

Underlying: Common Stock · 4,396 shares

Expires 2028-03-02

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_date: Stock options vested in annual installments of 25 percent over four years.

SEC source: 0000950170-24-026208 · ownership.xml · derivative · entry 14

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 956

Underlying: Common Stock · 3,805 shares

Expires 2027-03-03

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.

F9 · derivative.exercise_date: Stock options vested in annual installments of 25 percent over four years.

SEC source: 0000950170-24-026208 · ownership.xml · derivative · entry 13

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107

Underlying: Common Stock · 25 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.

F8 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs granted on March 3, 2020. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F8 · shares: These DERs were released in connection with the vesting of RSUs granted on March 3, 2020. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F8 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs granted on March 3, 2020. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F8 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs granted on March 3, 2020. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 12

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,969

F7 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.00 to $54.34 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 11

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,455

F6 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.00 to $54.51 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 10

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,997

F3 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $53.00 to $53.99 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 9

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,268

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

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 8

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,455

F5 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.07 to $54.71 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 7

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,781

F3 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $53.00 to $53.99 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 6

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,851

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

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 5

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,455

F4 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.04 to $54.51 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 4

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,681

F3 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $53.00 to $53.99 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 price.

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 3

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,260

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

SEC source: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 2

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,455

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: 0000950170-24-026208 · ownership.xml · nonDerivative · entry 1

Dowd Joseph P · CIK 0001553647 · VP, Zero Harm

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,255

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: 0000950170-24-026184 · ownership.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66

Underlying: Common Stock · 20 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 March 3, 2020. 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 March 3, 2020. 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 March 3, 2020. 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 March 3, 2020. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-026184 · 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: 30,896.366

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: 0000950170-24-026184 · 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: 31,523.366

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.

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: 0000950170-24-015945 · ownership.xml · nonDerivative · entry 1

Vartanian Nishan J. · CIK 0001564614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 460

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

SEC source: 0000950170-24-003149 · ownership.xml · derivative · entry 10

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156

Underlying: Common Stock · 102 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.

F11 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-003149 · ownership.xml · derivative · entry 9

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,760 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.

F10 · derivative.exercise_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

F10 · derivative.expiration_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

SEC source: 0000950170-24-003149 · ownership.xml · nonDerivative · entry 4

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,301

F5 · 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") and performance share units ("PSUs").

SEC source: 0000950170-24-003149 · ownership.xml · nonDerivative · entry 3

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,338

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: 0000950170-24-003149 · ownership.xml · nonDerivative · entry 2

Apostolou Stephanie L · CIK 0001806249 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,236

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: 0000950170-24-003156 · ownership.xml · derivative · entry 9

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102

Underlying: Common Stock · 62 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-003156 · ownership.xml · derivative · entry 8

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,618 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 performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

F8 · derivative.expiration_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

SEC source: 0000950170-24-003156 · ownership.xml · nonDerivative · entry 4

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,108

F4 · 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") and performance share units ("PSUs").

SEC source: 0000950170-24-003156 · ownership.xml · nonDerivative · entry 3

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,700

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: 0000950170-24-003156 · ownership.xml · nonDerivative · entry 2

Pearce Bradley A · CIK 0001776180 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,638

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: 0000950170-24-003158 · ownership.xml · derivative · entry 10

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 167

Underlying: Common Stock · 103 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.

F11 · derivative.exercise_price: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · shares: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · derivative.exercise_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

F11 · derivative.expiration_date: These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-003158 · ownership.xml · derivative · entry 9

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,760 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.

F10 · derivative.exercise_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

F10 · derivative.expiration_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

SEC source: 0000950170-24-003158 · ownership.xml · nonDerivative · entry 4

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,059

F5 · 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") and performance share units ("PSUs").

SEC source: 0000950170-24-003158 · ownership.xml · nonDerivative · entry 3

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,188

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: 0000950170-24-003158 · ownership.xml · nonDerivative · entry 2

Smith Jimmi Sue · CIK 0001684691 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,085

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: 0000950170-24-003160 · ownership.xml · derivative · entry 10

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 359

Underlying: Common Stock · 301 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-003160 · ownership.xml · derivative · entry 9

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,868 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.

F9 · derivative.exercise_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

F9 · derivative.expiration_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

SEC source: 0000950170-24-003160 · ownership.xml · nonDerivative · entry 4

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,253.738

F4 · 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") and performance share units ("PSUs").

SEC source: 0000950170-24-003160 · ownership.xml · nonDerivative · entry 3

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,485.738

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: 0000950170-24-003160 · ownership.xml · nonDerivative · entry 2

Sullivan James A. · CIK 0001450800 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,184.738

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: 0000950170-24-003150 · ownership.xml · derivative · entry 10

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,009

Underlying: Common Stock · 746 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. 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, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

SEC source: 0000950170-24-003150 · ownership.xml · derivative · entry 9

BALL M LEROY · CIK 0001229771 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 41,150 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.

F9 · derivative.exercise_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

F9 · derivative.expiration_date: Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.