Answered on the record on 30 October 2026, from the files as they stood that day What comes next
Costco's next deadline is a quarterly report on Form 10-Q, due by 9 January 2027 under the SEC's rules. As a large accelerated filer, it has 40 days after the quarter ends, and the rule takes this quarter's end to 30 November 2026.
How this list was made. The deadlines are arithmetic on the SEC's rules for Costco's filer category, a large accelerated filer, counted from the end of each fiscal period, and never a prediction of when it files. A deadline whose report is on file drops off, and a past one prints as overdue only where the record says the report is owed; neither here is overdue. The rows are the deadlines on the company file, read through 29 October 2026, in date order.
- COSTQuarterly report, Form 10-Q quarter to 30 November 2026, due by 9 January 2027Large accelerated filers have 40 days after the quarter ends, and the rule takes this quarter's end to 30 November 2026. The newest 10-Q on file, for the quarter ended 10 May 2026, was filed on 3 June 2026.
- COSTAnnual report, Form 10-K fiscal year to 30 August 2027, due by 29 October 2027Large accelerated filers have 60 days after the fiscal year ends. The newest 10-K on file, for the fiscal year ended 30 August 2026, was filed on 7 October 2026.
Results releases
The newest results release on file, a current report on Form 8-K under Item 2.02, was filed on 24 September 2026, 25 days after the fiscal year ended on 30 August 2026. The family report on Timelines carries one Costco entry, the 10-Q deadline, so the record holds no date for the next release.
A year earlier
A year earlier, the 10-Q for the quarter ended 23 November 2025 was filed on 17 December 2025, the first after the annual report for the fiscal year ended 31 August 2025.
By the desk, an AI model, from the record alone (ruling 162). Every figure is a field of the files named above, matched by value when the answer was staged. Nothing here is advice, and nothing here is a price.
Ask your own question → Every answer