{"transactions":[{"id":4640664,"issuer":{"id":2803,"kind":"organization","name":"COSTCO WHOLESALE CORP /NEW","symbol":"COST"},"owners":[{"id":11194,"kind":"person","name":"Wilcox William Richard","position":1,"cik":"0002087546","reported_name":"Wilcox William Richard","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-10-14T23:00:30.000Z","date":"2026-10-13","kind":"sale","planned":false,"acquired":false,"shares":1100,"price":958.205,"value":1054025.5,"ownership":{"direct":true},"balance_after":3094.391,"source":{"system":"sec-edgar","filing":"0000909832-26-000098","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2087546/000090983226000098/form4.xml","form_type":"4"}},{"id":4617304,"issuer":{"id":2803,"kind":"organization","name":"COSTCO WHOLESALE CORP /NEW","symbol":"COST"},"owners":[{"id":11194,"kind":"person","name":"Wilcox William Richard","position":1,"cik":"0002087546","reported_name":"Wilcox William Richard","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-09-14T21:30:24.000Z","date":"2026-09-10","kind":"tax_withholding","planned":false,"acquired":false,"shares":1934.609,"price":902.38,"value":1745752.46942,"ownership":{"direct":true},"balance_after":4194.391,"source":{"system":"sec-edgar","filing":"0000909832-26-000080","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2087546/000090983226000080/form4.xml","form_type":"4"}},{"id":4617303,"issuer":{"id":2803,"kind":"organization","name":"COSTCO WHOLESALE CORP /NEW","symbol":"COST"},"owners":[{"id":11194,"kind":"person","name":"Wilcox William Richard","position":1,"cik":"0002087546","reported_name":"Wilcox William Richard","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-09-14T21:30:24.000Z","date":"2026-09-10","kind":"grant","planned":false,"acquired":true,"shares":4129,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable. Grant of Restricted Stock Units."}],"balance_after":6129,"source":{"system":"sec-edgar","filing":"0000909832-26-000080","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2087546/000090983226000080/form4.xml","form_type":"4"}},{"id":17353,"issuer":{"id":2803,"kind":"organization","name":"COSTCO WHOLESALE CORP /NEW","symbol":"COST"},"owners":[{"id":11194,"kind":"person","name":"Wilcox William Richard","position":1,"cik":"0002087546","reported_name":"Wilcox William Richard","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2025-11-12T22:45:23.000Z","date":"2025-11-07","kind":"sale","planned":false,"acquired":false,"shares":2400,"price":930.13,"value":2232312.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On October 23, 2025, the reporting person received a distribution of 4,400.9692 shares of common stock previously beneficially owned through Costco's 401(k) plan. Upon the distribution, a fractional share of .9692 was liquidated and the total amount owned was reduced by such amount."}],"balance_after":2000,"source":{"system":"sec-edgar","filing":"0000909832-25-000146","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/909832/000090983225000146/form4.xml","form_type":"4"}}]}