{"transactions":[{"id":769225,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-21T21:18:42.000Z","date":"2026-05-20","kind":"grant","planned":false,"acquired":true,"shares":8558,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":253942,"source":{"system":"sec-edgar","filing":"0001724571-26-000002","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000172457126000002/edgardoc.xml","form_type":"4"}},{"id":1144451,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-19T20:47:37.000Z","date":"2025-05-15","kind":"grant","planned":false,"acquired":true,"shares":15097,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":245384,"source":{"system":"sec-edgar","filing":"0000071829-25-000074","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182925000074/edgardoc.xml","form_type":"4"}},{"id":1221045,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-06T22:31:58.000Z","date":"2025-03-05","kind":"purchase","planned":false,"acquired":true,"shares":10000,"price":5.38,"value":53800.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported is a weighted average price. These shares were purchased in multiple transactions in the open market at prices ranging from $5.35 to $5.40, inclusive. The reporting person undertakes to provide to NPK International Inc., any security holder of NPK International Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":230287,"source":{"system":"sec-edgar","filing":"0000071829-25-000014","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182925000014/edgardoc.xml","form_type":"4"}},{"id":1510080,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-20T21:05:56.000Z","date":"2024-05-16","kind":"grant","planned":false,"acquired":true,"shares":16108,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":220287,"source":{"system":"sec-edgar","filing":"0000071829-24-000066","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182924000066/edgardoc.xml","form_type":"4"}},{"id":1879251,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-05-26T00:22:29.000Z","date":"2023-05-18","kind":"grant","planned":false,"acquired":true,"shares":32134,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":204179,"source":{"system":"sec-edgar","filing":"0000071829-23-000086","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182923000086/edgardoc.xml","form_type":"4/A","original_submission_date":"2023-05-22"}},{"id":1883777,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-05-22T23:30:30.000Z","date":"2023-05-18","kind":"grant","planned":false,"acquired":true,"shares":38560,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":210605,"source":{"system":"sec-edgar","filing":"0000071829-23-000071","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182923000071/edgardoc.xml","form_type":"4"}},{"id":1949177,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-03-17T21:06:43.000Z","date":"2023-03-15","kind":"purchase","acquired":true,"shares":5000,"price":4.05,"value":20250.0,"ownership":{"direct":true},"balance_after":172045,"source":{"system":"sec-edgar","filing":"0000071829-23-000019","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182923000019/edgardoc.xml","form_type":"4"}},{"id":1949176,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-03-17T21:06:43.000Z","date":"2023-03-15","kind":"purchase","acquired":true,"shares":5000,"price":4,"value":20000.0,"ownership":{"direct":true},"balance_after":167045,"source":{"system":"sec-edgar","filing":"0000071829-23-000019","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182923000019/edgardoc.xml","form_type":"4"}},{"id":2109697,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-11-21T22:16:12.000Z","date":"2022-11-21","kind":"purchase","acquired":true,"shares":5000,"price":3.64,"value":18200.0,"ownership":{"direct":true},"balance_after":162045,"source":{"system":"sec-edgar","filing":"0000071829-22-000182","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182922000182/edgardoc.xml","form_type":"4"}},{"id":2119412,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-11-14T22:49:14.000Z","date":"2022-11-10","kind":"purchase","acquired":true,"shares":5000,"price":3.9481,"value":19740.5,"ownership":{"direct":true},"balance_after":157045,"source":{"system":"sec-edgar","filing":"0000071829-22-000174","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182922000174/edgardoc.xml","form_type":"4"}},{"id":2183246,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-17T23:00:04.000Z","date":"2022-08-16","kind":"purchase","acquired":true,"shares":15000,"price":2.6567,"value":39850.5,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported is a weighted average price. These shares were purchased in multiple transactions in the open market at prices ranging from $2.64 to $2.67, inclusive. The reporting person undertakes to provide to Newpark Resources, Inc., any security holder of Newpark Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":152045,"source":{"system":"sec-edgar","filing":"0000071829-22-000151","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182922000151/edgardoc.xml","form_type":"4"}},{"id":2262933,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-05-20T20:23:09.000Z","date":"2022-05-19","kind":"grant","acquired":true,"shares":36496,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":137045,"source":{"system":"sec-edgar","filing":"0000071829-22-000091","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182922000091/edgardoc.xml","form_type":"4"}},{"id":2702231,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-05-21T15:00:40.000Z","date":"2021-05-20","kind":"grant","acquired":true,"shares":34299,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":100549,"source":{"system":"sec-edgar","filing":"0000071829-21-000068","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182921000068/edgardoc.xml","form_type":"4"}},{"id":3138510,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-05-22T18:57:59.000Z","date":"2020-05-21","kind":"grant","acquired":true,"shares":30562,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting."}],"balance_after":66250,"source":{"system":"sec-edgar","filing":"0000071829-20-000055","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182920000055/edgardoc.xml","form_type":"4"}},{"id":3511217,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-05-28T15:49:21.000Z","date":"2019-05-23","kind":"grant","acquired":true,"shares":20435,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the date prior to the next annual stockholders meeting."}],"balance_after":35688,"source":{"system":"sec-edgar","filing":"0000071829-19-000062","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182919000062/edgardoc.xml","form_type":"4"}},{"id":3758244,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-11-20T22:15:06.000Z","date":"2018-11-20","kind":"purchase","acquired":true,"shares":1300,"price":7.66,"value":9958.0,"ownership":{"direct":true},"balance_after":15253,"source":{"system":"sec-edgar","filing":"0000071829-18-000150","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182918000150/edgardoc.xml","form_type":"4"}},{"id":3925153,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":45521,"kind":"person","name":"MINGE JOHN C","position":1,"cik":"0001724571","reported_name":"MINGE JOHN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-05-21T16:17:02.000Z","date":"2018-05-17","kind":"grant","acquired":true,"shares":13953,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares will vest on the earlier of the first anniversary of the date of grant or the date prior to the next annual stockholders meeting."}],"balance_after":13953,"source":{"system":"sec-edgar","filing":"0000071829-18-000086","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/71829/000007182918000086/edgardoc.xml","form_type":"4"}}]}