{"transactions":[{"id":4615136,"issuer":{"id":4885,"kind":"organization","name":"NPK International Inc.","symbol":"NPKI"},"owners":[{"id":159671,"kind":"person","name":"Warren Matthew James","position":1,"cik":"0002152870","reported_name":"Warren Matthew James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2026-09-10T22:22:57.000Z","date":"2026-09-09","kind":"sale","planned":true,"acquired":false,"shares":2991,"price":13.4112,"value":40112.8992,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported sale of 2,991 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 17, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $13.33 to $13.51, 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 sold at each separate price within the range set forth in footnote (2) to this Form 4."}],"balance_after":51439,"source":{"system":"sec-edgar","filing":"0002152870-26-000010","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2152870/000215287026000010/edgardoc.xml","form_type":"4"}}]}