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The stock will vest on the fifth anniversary of the Award Date, providing the reporting person is employed by the Company."}],"balance_after":400,"source":{"system":"sec-edgar","filing":"0001209191-22-007500","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919122007500/doc4.xml","form_type":"4"}},{"id":2893468,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2021-01-27T17:00:18.000Z","date":"2021-01-26","kind":"grant","acquired":true,"shares":25,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's 2014 Compensation and Stock Plan, on January 26, 2021, the reporting person was granted shares of restricted stock effective February 19, 2021 (the \"Award Date\").  The stock will vest on the fifth anniversary of the Award Date, providing the reporting person is employed by the Company."}],"balance_after":370,"source":{"system":"sec-edgar","filing":"0001209191-21-005699","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919121005699/doc4.xml","form_type":"4"}},{"id":3288649,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2020-02-05T16:45:20.000Z","date":"2020-02-04","kind":"grant","acquired":true,"shares":22,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's 2014 Compensation and Stock Plan, on February 4, 2020, the reporting person was granted shares of restricted stock effective February 25, 2020 (the \"Award Date\").  The stock will vest on the third anniversary of the Award Date, providing the reporting person is employed by the Company."}],"balance_after":345,"source":{"system":"sec-edgar","filing":"0001209191-20-006941","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919120006941/doc4.xml","form_type":"4"}},{"id":3668114,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2019-02-08T16:59:15.000Z","date":"2019-02-06","kind":"grant","acquired":true,"shares":25,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's 2014 Compensation and Stock Plan, on February 6, 2019, the reporting person was granted shares of restricted stock effective February 26, 2019 (the \"Award Date\").  The stock will vest on the third anniversary of the Award Date, providing the reporting person is employed by the Company."}],"balance_after":323,"source":{"system":"sec-edgar","filing":"0001209191-19-008606","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919119008606/doc4.xml","form_type":"4"}},{"id":3723324,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2018-12-20T19:20:46.000Z","date":"2018-12-18","kind":"tax_withholding","acquired":false,"shares":19,"price":386.65,"value":7346.35,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 2, 2015, the Compensation Committee of the Board of Directors of NewMarket Corporation (the \"Company\") approved stock awards to be granted on December 18, 2015 (the \"Award Date\") pursuant to the Company's 2014 Incentive Compensation and Stock Plan. The stock vested on December 18, 2018. The disposition being reported on this Form 4 represents the shares withheld in satisfaction of the withholding tax liability."}],"balance_after":298,"source":{"system":"sec-edgar","filing":"0001209191-18-063764","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919118063764/doc4.xml","form_type":"4"}},{"id":4023842,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2018-03-01T17:00:58.000Z","date":"2018-02-26","kind":"grant","acquired":true,"shares":25,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's 2014 Compensation and Stock Plan, on February 26th, 2018, the reporting person was granted shares of restricted stock effective March 14, 2018 (the \"Award Date\").  The stock will vest on the third anniversary of the Award Date, providing the reporting person is employed by the Company."}],"balance_after":317,"source":{"system":"sec-edgar","filing":"0001209191-18-015075","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919118015075/doc4.xml","form_type":"4"}},{"id":4160508,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2017-11-16T17:02:34.000Z","date":"2017-11-14","kind":"tax_withholding","acquired":false,"shares":24,"price":393.24,"value":9437.76,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 21, 2014, the Compensation Committee of the Board of Directors of NewMarket Corporation (the \"Company\") approved stock awards to be granted on November 14, 2014 (the \"Award Date\") pursuant to the Company's 2004 Incentive Compensation and Stock Plan. 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The disposition being reported on this Form 4 represents the shares withheld in satisfaction of the withholding tax liability."}],"balance_after":292,"source":{"system":"sec-edgar","filing":"0001209191-17-061226","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1575470/000120919117061226/doc4.xml","form_type":"4"}},{"id":4555136,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93710,"kind":"person","name":"Skrobacz William J","position":1,"cik":"0001575470","reported_name":"Skrobacz William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2016-11-15T17:34:26.000Z","date":"2016-11-11","kind":"tax_withholding","acquired":false,"shares":29,"price":416.65,"value":12082.85,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 24, 2013, the Compensation Committee of the Board of Directors of NewMarket Corporation (the \"Company\") approved stock awards to be granted on November 11, 2013 (the \"Award Date\") pursuant to the Company's 2004 Incentive Compensation and Stock Plan. 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