| 2026-08-05 | Press release | Costco Wholesale Corporation Reports July Sales Results |
| 2026-07-08 | Press release | Costco Wholesale Corporation Reports June Sales Results and Announces Quarterly Cash Dividend |
| 2026-07-08 | Press release | Costco Wholesale Corporation Reports June Sales Results and Announces Quarterly Cash Dividend · Q2 2026 |
| 2026-07-08 | 8-K | Form 8-K, Item 8.01 |
| 2026-06-03 | Press release | Costco Wholesale Corporation Reports May Sales Results |
| 2026-06-03 | Press release | Costco Wholesale Corporation Reports May Sales Results · Q2 2026 |
| 2026-06-03 | 10-Q | Form 10-Q for the quarter ended May 10 |
| 2026-05-28 | Press release | Costco Wholesale Corporation Reports Third Quarter and Year-To-Date Operating Results For Fiscal 2026 |
| 2026-05-28 | Press release | Costco Wholesale Corporation Reports Third Quarter and Year-To-Date Operating Results For Fiscal 2026 |
| 2026-05-28 | 8-K | Form 8-K, Item 2.02 results |
| 2026-05-28 | Transcript | Q3 FY26 earnings call transcript |
| 2026-05-06 | Press release | Costco Wholesale Corporation Reports April Sales Results |
| 2026-05-06 | Press release | Costco Wholesale Corporation Reports April Sales Results · Q2 2026 |
| 2026-04-15 | Press release | Costco Wholesale Corporation Announces an Increase in Its Quarterly Cash Dividend |
| 2026-04-15 | Press release | Costco Wholesale Corporation Announces an Increase in Its Quarterly Cash Dividend |
| 2026-04-15 | 8-K | Form 8-K, Item 8.01 |
| 2026-04-08 | Press release | Costco Wholesale Corporation Reports March Sales Results |
| 2026-04-08 | Press release | Costco Wholesale Corporation Reports March Sales Results · Q2 2026 |
| 2026-03-11 | 10-Q | Form 10-Q for the quarter ended Feb 15 |
| 2026-03-06 | Transcript | Q2 FY26 earnings call transcript |
| 2026-03-05 | Supplement | 2nd Quarter FY 2026 Supplemental Information |
| 2026-03-05 | Press release | Costco Wholesale Corporation Reports Second Quarter and Year-to-Date Operating Results for Fiscal 2026 and February Sales Results |
| 2026-03-05 | Press release | Costco Wholesale Corporation Reports Second Quarter and Year-to-Date Operating Results for Fiscal 2026 and February Sale |
| 2026-03-05 | 8-K | Form 8-K, Item 2.02 results |
| 2026-02-04 | Press release | Costco Wholesale Corporation Reports January Sales Results · Q2 2026 |
| 2026-02-04 | Press release | Costco Wholesale Corporation Reports January Sales Results · Q2 2026 |
| 2026-01-21 | 8-K | Form 8-K, Item 5.07 |
| 2026-01-15 | Press release | Costco Wholesale Corporation Announces Quarterly Cash Dividend |
| 2026-01-15 | Document | SHAREHOLDERS' MEETING RULES OF CONDUCT AND FAQS |
| 2026-01-15 | Document | SHAREHOLDERS' MEETING SAFE HARBOR STATEMENT |
| 2026-01-15 | Document | SHAREHOLDERS' MEETING Q&A |
| 2026-01-15 | Press release | Costco Wholesale Corporation Announces Quarterly Cash Dividend |
| 2026-01-07 | Press release | Costco Wholesale Corporation Reports December Sales Results · Q1 2026 |
| 2026-01-07 | Press release | Costco Wholesale Corporation Reports December Sales Results · Q1 2026 |
| 2025-12-17 | 10-Q | Form 10-Q for the quarter ended Nov 23 |
| 2025-12-12 | Transcript | Q1 FY26 earnings call transcript |
| 2025-12-11 | 8-K | Form 8-K, Item 2.02 results |
| 2025-12-04 | Proxy | Definitive proxy statement |
| 2025-10-20 | 8-K | Form 8-K, Item 5.02 |
| 2025-10-15 | 8-K | Form 8-K, Item 8.01 |