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These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d)."}],"balance_after":24172,"source":{"system":"sec-edgar","filing":"0001209191-23-002612","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919123002612/doc4.xml","form_type":"4"}},{"id":2062743,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Dividend Equivalent Rights","published_at":"2023-01-05T18:32:56.000Z","date":"2023-01-03","kind":"grant","acquired":true,"shares":89,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"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, 79 DERs accrued with respect to RSUs granted on March 3, 2020, January 4, 2021, and January 4, 2022, and 10 DERs accrued with respect to PSUs granted on January 4, 2021. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"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, 79 DERs accrued with respect to RSUs granted on March 3, 2020, January 4, 2021, and January 4, 2022, and 10 DERs accrued with respect to PSUs granted on January 4, 2021. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"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, 79 DERs accrued with respect to RSUs granted on March 3, 2020, January 4, 2021, and January 4, 2022, and 10 DERs accrued with respect to PSUs granted on January 4, 2021. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock."}],"balance_after":89,"derivative":{"underlying":"Common Stock","underlying_shares":89},"source":{"system":"sec-edgar","filing":"0001209191-23-002074","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919123002074/doc4.xml","form_type":"4"}},{"id":2062742,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Common Stock","published_at":"2023-01-05T18:32:56.000Z","date":"2023-01-04","kind":"grant","acquired":true,"shares":6480,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person was awarded time-based restricted stock units on January 4, 2023, which will vest in annual installments of one-third each over three years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 719 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on March 31, 2022, June 30, 2022 and September 30, 2022. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d)."}],"balance_after":23921,"source":{"system":"sec-edgar","filing":"0001209191-23-002074","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919123002074/doc4.xml","form_type":"4"}},{"id":2347880,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-03-07T16:15:40.000Z","date":"2022-03-03","kind":"tax_withholding","acquired":false,"shares":841,"price":28.96,"value":24355.36,"ownership":{"direct":true},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 133 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. 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These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d)."}],"balance_after":16722,"source":{"system":"sec-edgar","filing":"0001209191-22-016632","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122016632/doc4.xml","form_type":"4"}},{"id":2388574,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Restricted Stock Units","published_at":"2022-02-17T15:11:44.000Z","date":"2022-01-05","kind":"grant","acquired":true,"shares":1405,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units represent the right to receive shares of common stock on a one-for-one basis and may be settled in cash or in shares of common stock."},{"field":"shares","element":"transactionShares","label":"F2","text":"This Form 4 amendment is being filed to correct the number of performance share units awarded to the reporting person for the one-year performance period from January 1, 2021 through December 31, 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On January 4, 2021, the reporting person was granted performance share units for which the performance criteria for the one-year performance period from January 1, 2021 through December 31, 2021 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, 2024.  If the Company's total shareholder return over the three-year period of January 1, 2021 through December 31, 2023 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On January 4, 2021, the reporting person was granted performance share units for which the performance criteria for the one-year performance period from January 1, 2021 through December 31, 2021 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, 2024.  If the Company's total shareholder return over the three-year period of January 1, 2021 through December 31, 2023 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."}],"balance_after":1405,"derivative":{"underlying":"Common Stock","underlying_shares":1405},"source":{"system":"sec-edgar","filing":"0001209191-22-010677","document":"doc4a.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122010677/doc4a.xml","form_type":"4/A","original_submission_date":"2022-01-07"}},{"id":2440042,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Restricted Stock Units","published_at":"2022-01-07T18:13:22.000Z","date":"2022-01-05","kind":"grant","acquired":true,"shares":1346,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Restricted stock units represent the right to receive shares of common stock on a one-for-one basis and may be settled in cash or in shares of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On January 4, 2021, the reporting person was granted performance share units for which the performance criteria for the one-year performance period from January 1, 2021 through December 31, 2021 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, 2024.  If the Company's total shareholder return over the three-year period of January 1, 2021 through December 31, 2023 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On January 4, 2021, the reporting person was granted performance share units for which the performance criteria for the one-year performance period from January 1, 2021 through December 31, 2021 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, 2024.  If the Company's total shareholder return over the three-year period of January 1, 2021 through December 31, 2023 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."}],"balance_after":1346,"derivative":{"underlying":"Common Stock","underlying_shares":1346},"source":{"system":"sec-edgar","filing":"0001209191-22-002539","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122002539/doc4.xml","form_type":"4"}},{"id":2440041,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-01-07T18:13:22.000Z","date":"2022-01-05","kind":"tax_withholding","acquired":false,"shares":425,"price":33.27,"value":14139.75,"ownership":{"direct":true},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"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."}],"balance_after":17430,"source":{"system":"sec-edgar","filing":"0001209191-22-002539","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122002539/doc4.xml","form_type":"4"}},{"id":2441611,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Employee Stock Options (Right to Buy)","published_at":"2022-01-06T14:14:17.000Z","date":"2022-01-04","kind":"grant","acquired":true,"shares":6664,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person was granted stock options on January 4, 2022, which will vest in annual installments of 25 percent over four years."}],"balance_after":6664,"derivative":{"exercise_price":32.19,"expiration_date":"2032-01-04","underlying":"Common Stock","underlying_shares":6664},"source":{"system":"sec-edgar","filing":"0001209191-22-002129","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122002129/doc4.xml","form_type":"4"}},{"id":2441610,"issuer":{"id":5058,"kind":"organization","name":"Koppers Holdings Inc.","symbol":"KOP"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-01-06T14:14:17.000Z","date":"2022-01-04","kind":"grant","acquired":true,"shares":3640,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person was awarded time-based restricted stock units on January 4, 2022, which will vest in annual installments of 25 percent over four years."}],"balance_after":17855,"source":{"system":"sec-edgar","filing":"0001209191-22-002129","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1684691/000120919122002129/doc4.xml","form_type":"4"}},{"id":3592167,"issuer":{"id":3112,"kind":"organization","name":"EQT Corp","symbol":"EQT"},"owners":[{"id":70007,"kind":"person","name":"Smith Jimmi Sue","position":1,"cik":"0001684691","reported_name":"Smith Jimmi Sue","relationship":{"officer":true,"officer_title":"SVP & Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2019-03-18T20:29:47.000Z","date":"2019-03-15","kind":"exercise","acquired":false,"shares":678,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive in cash the economic equivalent of one share of EQT Corporation (Company) common stock. On March 15, 2019, 50% of the original Restricted Stock Unit award vested and paid out in cash based on the closing price of Company common stock on March 15, 2019. The remaining 50% will vest on March 15, 2020 provided that the recipient is employed by the Company through the vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive in cash the economic equivalent of one share of EQT Corporation (Company) common stock. On March 15, 2019, 50% of the original Restricted Stock Unit award vested and paid out in cash based on the closing price of Company common stock on March 15, 2019. The remaining 50% will vest on March 15, 2020 provided that the recipient is employed by the Company through the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive in cash the economic equivalent of one share of EQT Corporation (Company) common stock. On March 15, 2019, 50% of the original Restricted Stock Unit award vested and paid out in cash based on the closing price of Company common stock on March 15, 2019. The remaining 50% will vest on March 15, 2020 provided that the recipient is employed by the Company through the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive in cash the economic equivalent of one share of EQT Corporation (Company) common stock. On March 15, 2019, 50% of the original Restricted Stock Unit award vested and paid out in cash based on the closing price of Company common stock on March 15, 2019. 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On March 15, 2019, 50% of the original Restricted Stock Unit award vested and paid out in cash based on the closing price of Company common stock on March 15, 2019. 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