Company filings profile · CIK 0000909832
COSTCO WHOLESALE CORP /NEW — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for COSTCO WHOLESALE CORP /NEW (COST): 16 filings in the last 90 days vs 13 in the prior 90 (filing-velocity rising ↑ · 1.23×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 7, 2026. Source-linked, daily-refreshed.
Material 8-K events — COSTCO WHOLESALE CORP /NEW
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 24, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jul 8, 2026 | Other Events; Financial Statements and Exhibits | ↗ |
| May 28, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Apr 15, 2026 | Other Events; Financial Statements and Exhibits | ↗ |
Watch COSTCO WHOLESALE CORP /NEW automatically
Add this company to a watchlist and get a webhook/email the moment it files a material 8-K, an insider Form 4, or changes its risk-factor language.
Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Oct 7, 2026 | 10-K | 10-K | ↗ |
| Sep 30, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 30, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 30, 2026 | 3/A | PRIMARY DOCUMENT | ↗ |
| Sep 29, 2026 | 144 | ↗ | |
| Sep 29, 2026 | 144 | ↗ | |
| Sep 24, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Sep 10, 2026 | 3 | PRIMARY DOCUMENT | ↗ |
| Jul 14, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jul 8, 2026 | 8-K | Other Events; Financial Statements and Exhibits | ↗ |
| Jun 29, 2026 | 11-K | 11-K | ↗ |
| Jun 25, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 23, 2026 | 144 | ↗ | |
| Jun 12, 2026 | 144 | ↗ | |
| Jun 5, 2026 | 144 | ↗ | |
| Jun 3, 2026 | S-3ASR | S-3ASR | ↗ |
| Jun 3, 2026 | 10-Q | 10-Q | ↗ |
| May 29, 2026 | SD | SD | ↗ |
| May 28, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| May 15, 2026 | 3/A | PRIMARY DOCUMENT | ↗ |
| Apr 29, 2026 | SCHEDULE 13G | ↗ | |
| Apr 15, 2026 | 8-K | Other Events; Financial Statements and Exhibits | ↗ |
| Apr 1, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Apr 1, 2026 | 144 | ↗ | |
| Mar 26, 2026 | SCHEDULE 13G/A | ↗ | |
| Mar 26, 2026 | UPLOAD | ↗ | |
| Mar 23, 2026 | CORRESP | ↗ | |
| Mar 13, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Mar 13, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Mar 11, 2026 | 3 | PRIMARY DOCUMENT | ↗ |
| Mar 11, 2026 | 10-Q | 10-Q | ↗ |
| Mar 11, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Mar 9, 2026 | 144 | ↗ |