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Costco Wholesale Corp. SEC filings

In the twelve months since 23 September 2025 Costco Wholesale Corp. filed 19 documents with the SEC of the kinds listed here: 9 current reports (8-K), about 4 other events; 4 results of operations; 1 shareholder vote; 1 officer or director change; 3 quarterly reports (10-Q), 1 employee plan annual report (11-K), 1 shelf registration (S-3ASR), 1 conflict minerals report (SD), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A). The latest, filed 8 July 2026: 8-K, other events.

FiledFormWhat it was aboutPeriod or event dateFiling
8 July 20268-KOther events7 July 2026EDGAR
29 June 202611-Kemployee plan annual report31 December 2025EDGAR
3 June 2026S-3ASRshelf registrationEDGAR
3 June 202610-Qquarterly report10 May 2026EDGAR
29 May 2026SDconflict minerals reportEDGAR
28 May 20268-KResults of operations28 May 2026EDGAR
15 April 20268-KOther events15 April 2026EDGAR
11 March 202610-Qquarterly report15 February 2026EDGAR
5 March 20268-KResults of operations5 March 2026EDGAR
21 January 20268-KShareholder vote, Other events15 January 2026EDGAR
17 December 202510-Qquarterly report23 November 2025EDGAR
11 December 20258-KResults of operations11 December 2025EDGAR
4 December 2025DEFA14Aadditional proxy materialEDGAR
4 December 2025DEF 14Aproxy statement31 August 2025EDGAR
4 December 2025ARSannual report to shareholders31 August 2025EDGAR
20 October 20258-KOfficer or director change14 October 2025EDGAR
15 October 20258-KOther events15 October 2025EDGAR
8 October 202510-Kannual report31 August 2025EDGAR
25 September 20258-KResults of operations25 September 2025EDGAR

An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened. Form 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

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