{"transactions":[{"id":4636165,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33936,"kind":"person","name":"ROGERS JAMES E","position":1,"cik":"0001182166","reported_name":"ROGERS JAMES E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-10-06T20:30:07.000Z","date":"2026-10-02","kind":"gift","planned":false,"acquired":false,"shares":12,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":3885,"source":{"system":"sec-edgar","filing":"0001193125-26-415634","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526415634/ownership.xml","form_type":"4"}},{"id":4614721,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65520,"kind":"person","name":"GOTTWALD BRUCE C","position":1,"cik":"0000919561","reported_name":"GOTTWALD BRUCE C","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-09-10T20:30:05.000Z","date":"2026-09-09","kind":"gift","planned":false,"acquired":false,"shares":132,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":361623,"source":{"system":"sec-edgar","filing":"0001193125-26-387935","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526387935/ownership.xml","form_type":"4"}},{"id":721111,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33936,"kind":"person","name":"ROGERS JAMES E","position":1,"cik":"0001182166","reported_name":"ROGERS JAMES E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:30:19.000Z","date":"2026-07-01","kind":"grant","planned":false,"acquired":true,"shares":157,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":3897,"source":{"system":"sec-edgar","filing":"0001193125-26-292653","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182166/000119312526292653/ownership.xml","form_type":"4"}},{"id":721673,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34149,"kind":"person","name":"GAMBILL MARK M","position":1,"cik":"0001170913","reported_name":"GAMBILL MARK M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:30:18.000Z","date":"2026-07-01","kind":"grant","planned":false,"acquired":true,"shares":157,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":4149,"source":{"system":"sec-edgar","filing":"0001193125-26-292652","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1170913/000119312526292652/ownership.xml","form_type":"4"}},{"id":720951,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33897,"kind":"person","name":"Harris H Hiter III","position":1,"cik":"0001650419","reported_name":"Harris H Hiter III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:30:16.000Z","date":"2026-07-01","kind":"grant","planned":false,"acquired":true,"shares":157,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":2239,"source":{"system":"sec-edgar","filing":"0001193125-26-292641","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526292641/ownership.xml","form_type":"4"}},{"id":720950,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33896,"kind":"person","name":"Ukrop Lowell Simmons","position":1,"cik":"0001998445","reported_name":"Ukrop Lowell Simmons","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:30:15.000Z","date":"2026-07-01","kind":"grant","planned":false,"acquired":true,"shares":157,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":494,"source":{"system":"sec-edgar","filing":"0001193125-26-292651","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526292651/ownership.xml","form_type":"4"}},{"id":720948,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33895,"kind":"person","name":"Xu Ting","position":1,"cik":"0001913563","reported_name":"Xu Ting","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:30:11.000Z","date":"2026-07-01","kind":"grant","planned":false,"acquired":true,"shares":157,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":1086,"source":{"system":"sec-edgar","filing":"0001193125-26-292638","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526292638/ownership.xml","form_type":"4"}},{"id":723882,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-06-29T20:30:03.000Z","date":"2026-06-18","kind":"gift","planned":false,"acquired":false,"shares":211,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":116424,"source":{"system":"sec-edgar","filing":"0001193125-26-288549","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526288549/ownership.xml","form_type":"4"}},{"id":746003,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-06-08T20:30:13.000Z","date":"2026-06-04","kind":"gift","planned":false,"acquired":false,"shares":1500,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":116635,"source":{"system":"sec-edgar","filing":"0001193125-26-261837","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526261837/ownership.xml","form_type":"4"}},{"id":881767,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33895,"kind":"person","name":"Xu Ting","position":1,"cik":"0001913563","reported_name":"Xu Ting","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-25T21:30:14.000Z","date":"2026-02-24","kind":"purchase","planned":false,"acquired":true,"shares":400,"price":619.21,"value":247684.0,"ownership":{"direct":true},"balance_after":929,"source":{"system":"sec-edgar","filing":"0001193125-26-071771","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526071771/ownership.xml","form_type":"4"}},{"id":890481,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 13)"},"balance_after":363,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890480,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 12)"},"balance_after":378,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890479,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 11)"},"balance_after":363,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890478,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 10)"},"balance_after":522,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890477,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 9)"},"balance_after":618,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890476,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 8)"},"balance_after":807,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890475,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 7)"},"balance_after":1164,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890474,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 6)"},"balance_after":1186,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890473,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 5)"},"balance_after":1436,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890472,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 4)"},"balance_after":1678,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890471,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 3)"},"balance_after":1830,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890470,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 2)"},"balance_after":1988,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890469,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 1)"},"balance_after":2436,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890468,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":60,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held by wife"},"balance_after":5147,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890467,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":false,"shares":1320,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":118135,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":890466,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-20T21:30:10.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":true,"shares":60,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 11, 2026, 81,163 shares of the Company's common stock were transferred out of the 2025 GRAT as an annuity payment to the reporting person's directly held account."}],"balance_after":119455,"source":{"system":"sec-edgar","filing":"0001193125-26-061459","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526061459/ownership.xml","form_type":"4"}},{"id":891042,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65469,"kind":"person","name":"FITZGERALD TIMOTHY K","position":1,"cik":"0002045451","reported_name":"FITZGERALD TIMOTHY K","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President & CFO"}}],"security":"Common Stock","published_at":"2026-02-20T16:41:56.000Z","date":"2026-02-19","kind":"tax_withholding","planned":false,"acquired":false,"shares":34,"price":607.04,"value":20639.36,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the vesting of shares of restricted stock granted to the reporting person effective February 19, 2021."}],"balance_after":622,"source":{"system":"sec-edgar","filing":"0001193125-26-061513","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2045451/000119312526061513/ownership.xml","form_type":"4"}},{"id":891603,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65520,"kind":"person","name":"GOTTWALD BRUCE C","position":1,"cik":"0000919561","reported_name":"GOTTWALD BRUCE C","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-02-20T16:30:09.000Z","date":"2026-02-18","kind":"gift","planned":false,"acquired":false,"shares":3000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 11, 2026, 304,014 shares of the Company's common stock were transferred out of the 2025 GRAT as an annuity payment to the reporting person's directly held account."}],"balance_after":361755,"source":{"system":"sec-edgar","filing":"0001193125-26-061458","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/919561/000119312526061458/ownership.xml","form_type":"4"}},{"id":914278,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2026-02-09T21:30:14.000Z","date":"2026-02-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":153,"price":714.88,"value":109376.64,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 5, 2026."}],"balance_after":680,"source":{"system":"sec-edgar","filing":"0001193125-26-042886","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526042886/ownership.xml","form_type":"4"}},{"id":914277,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2026-02-09T21:30:14.000Z","date":"2026-02-05","kind":"grant","planned":false,"acquired":true,"shares":475,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 5, 2026, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":833,"source":{"system":"sec-edgar","filing":"0001193125-26-042886","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526042886/ownership.xml","form_type":"4"}},{"id":914272,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-09T21:30:09.000Z","date":"2026-02-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":203,"price":714.88,"value":145120.64,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 5, 2026."}],"balance_after":38232,"source":{"system":"sec-edgar","filing":"0001193125-26-042882","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526042882/ownership.xml","form_type":"4"}},{"id":914271,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2026-02-09T21:30:09.000Z","date":"2026-02-05","kind":"grant","planned":false,"acquired":true,"shares":655,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 5, 2026, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":38435,"source":{"system":"sec-edgar","filing":"0001193125-26-042882","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312526042882/ownership.xml","form_type":"4"}},{"id":914544,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67266,"kind":"person","name":"Jewett Bryce Dickinson III","position":1,"cik":"0001818486","reported_name":"Jewett Bryce Dickinson III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2026-02-09T16:30:12.000Z","date":"2026-02-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":136,"price":714.88,"value":97223.68,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 5, 2026."}],"balance_after":453,"source":{"system":"sec-edgar","filing":"0001193125-26-042885","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818486/000119312526042885/ownership.xml","form_type":"4"}},{"id":914543,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67266,"kind":"person","name":"Jewett Bryce Dickinson III","position":1,"cik":"0001818486","reported_name":"Jewett Bryce Dickinson III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2026-02-09T16:30:12.000Z","date":"2026-02-05","kind":"grant","planned":false,"acquired":true,"shares":415,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 5, 2026, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":589,"source":{"system":"sec-edgar","filing":"0001193125-26-042885","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818486/000119312526042885/ownership.xml","form_type":"4"}},{"id":914409,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67242,"kind":"person","name":"Paliotti Brian D","position":1,"cik":"0001627976","reported_name":"Paliotti Brian D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President Afton Chemical Corp"}}],"security":"Common Stock","published_at":"2026-02-09T16:30:10.000Z","date":"2026-02-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":171,"price":714.88,"value":122244.48,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 5, 2026."}],"balance_after":3239,"source":{"system":"sec-edgar","filing":"0001193125-26-042883","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1627976/000119312526042883/ownership.xml","form_type":"4"}},{"id":914408,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67242,"kind":"person","name":"Paliotti Brian D","position":1,"cik":"0001627976","reported_name":"Paliotti Brian D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President Afton Chemical Corp"}}],"security":"Common Stock","published_at":"2026-02-09T16:30:10.000Z","date":"2026-02-05","kind":"grant","planned":false,"acquired":true,"shares":535,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 5, 2026, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":3410,"source":{"system":"sec-edgar","filing":"0001193125-26-042883","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1627976/000119312526042883/ownership.xml","form_type":"4"}},{"id":975866,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33895,"kind":"person","name":"Xu Ting","position":1,"cik":"0001913563","reported_name":"Xu Ting","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-09T21:30:05.000Z","date":"2025-09-18","kind":"gift","planned":false,"acquired":false,"shares":330,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":529,"source":{"system":"sec-edgar","filing":"0001193125-25-312814","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525312814/ownership.xml","form_type":"4"}},{"id":988542,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-11-25","kind":"gift","planned":false,"acquired":false,"shares":46175,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"2022 GRAT"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On November 25, 2025, 17,432 shares of the Company's common stock were transferred out of 2022 GRAT as an annuity payment to the reporting person's directly held account. Following this transfer, the trust was terminated and the remaining 46,175 shares were transferred to the remaindermen of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":988541,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-11-24","kind":"gift","planned":false,"acquired":true,"shares":51,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 13)"},"balance_after":183,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":988540,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-11-24","kind":"gift","planned":false,"acquired":true,"shares":51,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 11)"},"balance_after":183,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":988539,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-11-24","kind":"gift","planned":false,"acquired":true,"shares":51,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 8)"},"balance_after":627,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":988538,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-11-24","kind":"gift","planned":false,"acquired":true,"shares":51,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 6)"},"balance_after":1006,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":988537,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-11-25T23:43:27.000Z","date":"2025-06-27","kind":"gift","planned":false,"acquired":false,"shares":264,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On November 25, 2025, 17,432 shares of the Company's common stock were transferred out of 2022 GRAT as an annuity payment to the reporting person's directly held account. Following this transfer, the trust was terminated and the remaining 46,175 shares were transferred to the remaindermen of the trust."}],"balance_after":37780,"source":{"system":"sec-edgar","filing":"0001193125-25-297729","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000119312525297729/ownership.xml","form_type":"4"}},{"id":1047139,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65520,"kind":"person","name":"GOTTWALD BRUCE C","position":1,"cik":"0000919561","reported_name":"GOTTWALD BRUCE C","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-09-05T15:35:49.000Z","date":"2025-09-05","kind":"gift","planned":false,"acquired":false,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":60741,"source":{"system":"sec-edgar","filing":"0000950170-25-113241","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/919561/000095017025113241/ownership.xml","form_type":"4"}},{"id":1049392,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-09-03T20:43:06.000Z","date":"2025-08-25","kind":"gift","planned":false,"acquired":false,"shares":315,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":20612,"source":{"system":"sec-edgar","filing":"0000950170-25-112851","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025112851/ownership.xml","form_type":"4"}},{"id":1097799,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33936,"kind":"person","name":"ROGERS JAMES E","position":1,"cik":"0001182166","reported_name":"ROGERS JAMES E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-01T20:39:26.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":3740,"source":{"system":"sec-edgar","filing":"0000950170-25-092290","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182166/000095017025092290/ownership.xml","form_type":"4"}},{"id":1097702,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33897,"kind":"person","name":"Harris H Hiter III","position":1,"cik":"0001650419","reported_name":"Harris H Hiter III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-01T20:38:54.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":2082,"source":{"system":"sec-edgar","filing":"0000950170-25-092288","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025092288/ownership.xml","form_type":"4"}},{"id":1098158,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34149,"kind":"person","name":"GAMBILL MARK M","position":1,"cik":"0001170913","reported_name":"GAMBILL MARK M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-01T20:38:20.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":3992,"source":{"system":"sec-edgar","filing":"0000950170-25-092287","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1170913/000095017025092287/ownership.xml","form_type":"4"}},{"id":1097700,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33896,"kind":"person","name":"Ukrop Lowell Simmons","position":1,"cik":"0001998445","reported_name":"Ukrop Lowell Simmons","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-01T20:37:52.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":337,"source":{"system":"sec-edgar","filing":"0000950170-25-092286","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025092286/ownership.xml","form_type":"4"}},{"id":1097699,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33895,"kind":"person","name":"Xu Ting","position":1,"cik":"0001913563","reported_name":"Xu Ting","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-01T20:37:25.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":859,"source":{"system":"sec-edgar","filing":"0000950170-25-092285","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025092285/ownership.xml","form_type":"4"}},{"id":1138864,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-05-21T20:35:06.000Z","date":"2025-05-20","kind":"gift","planned":false,"acquired":false,"shares":1550,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":20927,"source":{"system":"sec-edgar","filing":"0000950170-25-075818","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025075818/ownership.xml","form_type":"4"}},{"id":1149027,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2025-05-14T20:39:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":311,"price":642.43,"value":199795.73,"ownership":{"direct":true},"balance_after":358,"source":{"system":"sec-edgar","filing":"0000950170-25-071534","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025071534/ownership.xml","form_type":"4"}},{"id":1166317,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":132,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 13)"},"balance_after":132,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166316,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":198,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 12)"},"balance_after":198,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166315,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":132,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 11)"},"balance_after":132,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166314,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":66,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 9)"},"balance_after":438,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166313,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":66,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 7)"},"balance_after":984,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166312,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":33,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 5)"},"balance_after":1286,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166311,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":true,"shares":33,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 3)"},"balance_after":1680,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166310,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-04-24T20:40:25.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":false,"shares":198,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":22477,"source":{"system":"sec-edgar","filing":"0000950170-25-058135","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025058135/ownership.xml","form_type":"4"}},{"id":1166743,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65520,"kind":"person","name":"GOTTWALD BRUCE C","position":1,"cik":"0000919561","reported_name":"GOTTWALD BRUCE C","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-24T16:51:28.000Z","date":"2025-04-22","kind":"gift","planned":false,"acquired":false,"shares":198,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On January 29, 2025, the reporting person contributed 850,000 shares of common stock to a grantor retained annuity trust (the \"2025 GRAT\") for the benefit of himself and his adult children.  The reporting person is the trustee and sole annuitant of the 2025 GRAT."}],"balance_after":63141,"source":{"system":"sec-edgar","filing":"0000950170-25-058160","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/919561/000095017025058160/ownership.xml","form_type":"4"}},{"id":1235546,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-03-03T21:15:08.000Z","date":"2025-02-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":230,"price":563.12,"value":129517.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 27, 2025."}],"balance_after":22675,"source":{"system":"sec-edgar","filing":"0000950170-25-030867","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025030867/ownership.xml","form_type":"4"}},{"id":1235545,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-03-03T21:15:08.000Z","date":"2025-02-27","kind":"grant","planned":false,"acquired":true,"shares":610,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 27, 2025, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On January 27, 2025, the reporting person contributed 225,000 shares of common stock to a grantor retained annuity trust (the \"2025 GRAT\") for the benefit of himself and his adult children.  The reporting person is the trustee and sole annuitant of the 2025 GRAT."}],"balance_after":22905,"source":{"system":"sec-edgar","filing":"0000950170-25-030867","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025030867/ownership.xml","form_type":"4"}},{"id":1235544,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2025-03-03T21:15:03.000Z","date":"2025-02-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":134,"price":563.12,"value":75458.08,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 27, 2025."}],"balance_after":669,"source":{"system":"sec-edgar","filing":"0000950170-25-030864","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025030864/ownership.xml","form_type":"4"}},{"id":1235543,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2025-03-03T21:15:03.000Z","date":"2025-02-27","kind":"grant","planned":false,"acquired":true,"shares":445,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 27, 2025, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":803,"source":{"system":"sec-edgar","filing":"0000950170-25-030864","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025030864/ownership.xml","form_type":"4"}},{"id":1235719,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67242,"kind":"person","name":"Paliotti Brian D","position":1,"cik":"0001627976","reported_name":"Paliotti Brian D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President Afton Chemical Corp"}}],"security":"Common Stock","published_at":"2025-03-03T16:15:06.000Z","date":"2025-02-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":151,"price":563.12,"value":85031.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the Performance Stock that vested on February 27, 2025."}],"balance_after":2875,"source":{"system":"sec-edgar","filing":"0000950170-25-030866","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1627976/000095017025030866/ownership.xml","form_type":"4"}},{"id":1235718,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67242,"kind":"person","name":"Paliotti Brian D","position":1,"cik":"0001627976","reported_name":"Paliotti Brian D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President Afton Chemical Corp"}}],"security":"Common Stock","published_at":"2025-03-03T16:15:06.000Z","date":"2025-02-27","kind":"grant","planned":false,"acquired":true,"shares":500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 27, 2025, the Compensation Committee certified attainment of the performance goals for certain performance-based restricted stock awards (\"Performance Stock\").  The Performance Stock settled with shares of common stock."}],"balance_after":3026,"source":{"system":"sec-edgar","filing":"0000950170-25-030866","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1627976/000095017025030866/ownership.xml","form_type":"4"}},{"id":1241188,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65469,"kind":"person","name":"FITZGERALD TIMOTHY K","position":1,"cik":"0002045451","reported_name":"FITZGERALD TIMOTHY K","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President & CFO"}}],"security":"Common Stock","published_at":"2025-02-27T16:25:03.000Z","date":"2025-02-25","kind":"tax_withholding","planned":false,"acquired":false,"shares":23,"price":562.73,"value":12942.79,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the vesting of shares of restricted stock granted to the reporting person effective February 25, 2020."}],"balance_after":656,"source":{"system":"sec-edgar","filing":"0000950170-25-029097","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2045451/000095017025029097/ownership.xml","form_type":"4"}},{"id":1278998,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":83486,"kind":"person","name":"PIETRANTONI ANN P","position":1,"cik":"0002045696","reported_name":"PIETRANTONI ANN P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2025-02-07T16:30:45.000Z","date":"2025-02-05","kind":"grant","planned":false,"acquired":true,"shares":30,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 5, 2025, the Compensation Committee of the Board of Directors of NewMarket Corporation (the \"Company\") approved a grant of shares of restricted stock effective March 5, 2025 (the \"Award Date\") pursuant to the Company's 2023 Incentive Compensation and Stock Plan. The stock will vest on the fifth anniversary of the Award Date, provided the reporting person is employed by the Company."}],"balance_after":63,"source":{"system":"sec-edgar","filing":"0000950170-25-016345","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2045696/000095017025016345/ownership.xml","form_type":"4"}},{"id":1297386,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 10)"},"balance_after":402,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297385,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 9)"},"balance_after":372,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297384,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 8)"},"balance_after":576,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297383,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 7)"},"balance_after":918,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297382,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 6)"},"balance_after":955,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297381,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 5)"},"balance_after":1253,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297380,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 4)"},"balance_after":1558,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297379,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":75,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 3)"},"balance_after":1647,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297378,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 2)"},"balance_after":1868,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297377,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":true,"shares":150,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Shares held as trustee for grandchild (trust 1)"},"balance_after":2316,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1297376,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2025-01-22T21:48:43.000Z","date":"2025-01-21","kind":"gift","planned":false,"acquired":false,"shares":1425,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":247295,"source":{"system":"sec-edgar","filing":"0000950170-25-007827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017025007827/ownership.xml","form_type":"4"}},{"id":1333668,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-12-12T21:35:38.000Z","date":"2024-12-10","kind":"gift","planned":false,"acquired":false,"shares":2350,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":248720,"source":{"system":"sec-edgar","filing":"0000950170-24-135834","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024135834/ownership.xml","form_type":"4"}},{"id":1350771,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-11-26T21:15:41.000Z","date":"2024-11-26","kind":"gift","planned":false,"acquired":false,"shares":11940,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"2021 GRAT #2"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On November 26, 2024, 12,773 shares of the Company's common stock were transferred out of 2021 GRAT #2 as an annuity payment to the reporting person's directly held account.  Following this transfer, the trust was terminated and the remaining 11,940 shares were transferred to the remaindermen of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-24-131045","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024131045/ownership.xml","form_type":"4"}},{"id":1350770,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-11-26T21:15:41.000Z","date":"2024-11-26","kind":"gift","planned":false,"acquired":true,"shares":65143,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On November 26, 2024, 12,773 shares of the Company's common stock were transferred out of 2021 GRAT #2 as an annuity payment to the reporting person's directly held account.  Following this transfer, the trust was terminated and the remaining 11,940 shares were transferred to the remaindermen of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On November 26, 2024, 19,585 shares of the Company's common stock were transferred out of 2022 GRAT as an annuity payment to the reporting person's directly held account."}],"balance_after":251070,"source":{"system":"sec-edgar","filing":"0000950170-24-131045","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024131045/ownership.xml","form_type":"4"}},{"id":1351601,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":65520,"kind":"person","name":"GOTTWALD BRUCE C","position":1,"cik":"0000919561","reported_name":"GOTTWALD BRUCE C","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-11-26T16:17:07.000Z","date":"2024-11-26","kind":"gift","planned":true,"acquired":false,"shares":195429,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"2022 GRAT"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On November 26, 2024, 163,660 shares of the Company's common stock were transferred out of the 2022 GRAT as an annuity payment to the reporting person's directly held account.  Following this transfer, the trust was terminated and the remaining 195,429 shares were transferred to the remaindermen of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-24-131048","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/919561/000095017024131048/ownership.xml","form_type":"4"}},{"id":1434682,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2024-08-13T20:34:39.000Z","date":"2024-08-09","kind":"sale","planned":false,"acquired":false,"shares":33,"price":545.36,"value":17996.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transaction at prices ranging from $545.04 to $545.54, inclusive."}],"balance_after":358,"source":{"system":"sec-edgar","filing":"0000950170-24-096348","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024096348/ownership.xml","form_type":"4"}},{"id":1434681,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":67206,"kind":"person","name":"Hazelgrove Bruce R III","position":1,"cik":"0001318864","reported_name":"Hazelgrove Bruce R III","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & CAO"}}],"security":"Common Stock","published_at":"2024-08-13T20:34:39.000Z","date":"2024-08-09","kind":"sale","planned":false,"acquired":false,"shares":1237,"price":544.28,"value":673274.36,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $544.25 to $544.38, inclusive. The reporting person undertakes to provide to NewMarket Corporation, any security holder of NewMarket Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote as well as in footnote 2."}],"balance_after":391,"source":{"system":"sec-edgar","filing":"0000950170-24-096348","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024096348/ownership.xml","form_type":"4"}},{"id":1462900,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33936,"kind":"person","name":"ROGERS JAMES E","position":1,"cik":"0001182166","reported_name":"ROGERS JAMES E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T20:40:56.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":193,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":3596,"source":{"system":"sec-edgar","filing":"0000950170-24-080590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182166/000095017024080590/ownership.xml","form_type":"4"}},{"id":1462486,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33896,"kind":"person","name":"Ukrop Lowell Simmons","position":1,"cik":"0001998445","reported_name":"Ukrop Lowell Simmons","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T20:39:57.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":193,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":193,"source":{"system":"sec-edgar","filing":"0000950170-24-080588","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024080588/ownership.xml","form_type":"4"}},{"id":1462485,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33895,"kind":"person","name":"Xu Ting","position":1,"cik":"0001913563","reported_name":"Xu Ting","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T20:39:05.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":193,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":715,"source":{"system":"sec-edgar","filing":"0000950170-24-080584","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024080584/ownership.xml","form_type":"4"}},{"id":1463635,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34149,"kind":"person","name":"GAMBILL MARK M","position":1,"cik":"0001170913","reported_name":"GAMBILL MARK M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T20:38:26.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":193,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":3848,"source":{"system":"sec-edgar","filing":"0000950170-24-080581","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1170913/000095017024080581/ownership.xml","form_type":"4"}},{"id":1462484,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":33897,"kind":"person","name":"Harris H Hiter III","position":1,"cik":"0001650419","reported_name":"Harris H Hiter III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T20:36:12.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":193,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents annual stock grant to non-employee directors. Shares were issued under the NewMarket Corporation 2023 Incentive Compensation and Stock Plan."}],"balance_after":1938,"source":{"system":"sec-edgar","filing":"0000950170-24-080574","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024080574/ownership.xml","form_type":"4"}},{"id":1586394,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-08T21:16:42.000Z","date":"2024-03-06","kind":"sale","planned":false,"acquired":false,"shares":216,"price":632,"value":136512.0,"ownership":{"direct":true},"balance_after":153569,"source":{"system":"sec-edgar","filing":"0000950170-24-028654","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024028654/ownership.xml","form_type":"4"}},{"id":1588926,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-07T21:33:34.000Z","date":"2024-03-05","kind":"sale","planned":false,"acquired":false,"shares":3000,"price":643.14,"value":1929420.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $643.00 to $643.93, inclusive. The reporting person undertakes to provide to NewMarket Corporation, any security holder of NewMarket Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":153785,"source":{"system":"sec-edgar","filing":"0000950170-24-028047","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024028047/ownership.xml","form_type":"4"}},{"id":1588925,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93355,"kind":"person","name":"Ridgeway Gail","position":1,"cik":"0001962438","reported_name":"Ridgeway Gail","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2024-03-07T21:32:22.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":36,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's 2023 Incentive Compensation and Stock Plan, on March 5, 2024, the reporting person was granted shares of restricted stock effective March 5, 2024 (the \"Award Date\").  The stock will vest on the fifth anniversary of the Award Date, provided the reporting person is employed by the Company."}],"balance_after":264,"source":{"system":"sec-edgar","filing":"0000950170-24-028046","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024028046/ownership.xml","form_type":"4"}},{"id":1591226,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-06T21:41:40.000Z","date":"2024-03-04","kind":"sale","planned":false,"acquired":false,"shares":453,"price":650.01,"value":294454.53,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $650.00 to $650.25, inclusive."}],"balance_after":156785,"source":{"system":"sec-edgar","filing":"0000950170-24-027232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024027232/ownership.xml","form_type":"4"}},{"id":1591225,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-06T21:41:40.000Z","date":"2024-03-04","kind":"sale","planned":false,"acquired":false,"shares":8,"price":648.08,"value":5184.64,"ownership":{"direct":true},"balance_after":157238,"source":{"system":"sec-edgar","filing":"0000950170-24-027232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024027232/ownership.xml","form_type":"4"}},{"id":1591224,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-06T21:41:40.000Z","date":"2024-03-04","kind":"sale","planned":false,"acquired":false,"shares":860,"price":647.6,"value":556936.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $647.05 to $647.94, inclusive."}],"balance_after":157246,"source":{"system":"sec-edgar","filing":"0000950170-24-027232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024027232/ownership.xml","form_type":"4"}},{"id":1591223,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-06T21:41:40.000Z","date":"2024-03-04","kind":"sale","planned":false,"acquired":false,"shares":1026,"price":646.3,"value":663103.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $646.00 to $646.91, inclusive."}],"balance_after":158106,"source":{"system":"sec-edgar","filing":"0000950170-24-027232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024027232/ownership.xml","form_type":"4"}},{"id":1591222,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":34790,"kind":"person","name":"GOTTWALD THOMAS E","position":1,"cik":"0001246518","reported_name":"GOTTWALD THOMAS E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2024-03-06T21:41:40.000Z","date":"2024-03-04","kind":"sale","planned":false,"acquired":false,"shares":2537,"price":645.23,"value":1636948.51,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $645.00 to $645.97, inclusive. The reporting person undertakes to provide to NewMarket Corporation, any security holder of NewMarket Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote as well as in footnotes 2 through 4."}],"balance_after":159132,"source":{"system":"sec-edgar","filing":"0000950170-24-027232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024027232/ownership.xml","form_type":"4"}},{"id":1609744,"issuer":{"id":3626,"kind":"organization","name":"NEWMARKET CORP","symbol":"NEU"},"owners":[{"id":93355,"kind":"person","name":"Ridgeway Gail","position":1,"cik":"0001962438","reported_name":"Ridgeway Gail","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Controller"}}],"security":"Common Stock","published_at":"2024-02-29T21:30:43.000Z","date":"2024-02-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":14,"price":636.31,"value":8908.34,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by the Company to satisfy tax withholding obligations related to the vesting of shares of restricted stock granted to the reporting person effective February 26, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Total reflects the prior withholding of 9 shares for taxes upon the vesting of shares of restricted stock on March 14, 2023."}],"balance_after":228,"source":{"system":"sec-edgar","filing":"0000950170-24-023154","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1282637/000095017024023154/ownership.xml","form_type":"4"}}],"next_cursor":"2024-02-29T21:30:43.000000Z,1609744"}