🕵️ Costco Wholesale Corp /NEW ($COST)
SEC insider & ownership activity, last 12 months · CIK 909832 · every row links its SEC filing
Over the last 12 months insiders sold $19.6M with no open-market buying against it. The Miller Family Trust sold $4.5M in discretionary trades (Sep–Jan). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 10 sellers, $19.6M (15 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| The Miller Family Trust | 0 | – | 2 | $4.5M | Jan 9, 2026 |
| Adamo Claudine | 0 | – | 2 | $3.3M | Mar 9, 2026 |
| Polit Javier | 0 | – | 2 | $2.3M | Dec 30, 2025 |
| Wilcox William Richard | 0 | – | 1 | $2.2M | Nov 7, 2025 |
| Caton Frates | 0 | – | 2 | $2.1M | Apr 1, 2026 |
| Teresa A. Jones | 0 | – | 2 | $1.4M | Jan 21, 2026 |
| James C. Klauer | 0 | – | 1 | $1.4M | Jan 14, 2026 |
| Barbre Tiffany Marie | 0 | – | 1 | $1.2M | Oct 24, 2025 |
| Kenneth D. Denman | 0 | – | 1 | $847K | Jun 23, 2026 |
| Susan L. Decker | 0 | – | 1 | $437K | Jan 16, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Vanguard Capital Management | 7.5% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Kenneth D. Denman | $847K | Jun 23, 2026 | filing ↗ |
| Patrick J. Callans | $973K | Jun 12, 2026 | filing ↗ |
| Patrick J. Callans | $995K | Jun 5, 2026 | filing ↗ |
| Caton Frates | $690K | Apr 1, 2026 | filing ↗ |
| Adamo Claudine | $732K | Mar 9, 2026 | filing ↗ |
| Teresa A. Jones | $838K | Jan 21, 2026 | filing ↗ |
| Susan L Decker Trust | $437K | Jan 16, 2026 | filing ↗ |
| James C. Klauer | $1.4M | Jan 14, 2026 | filing ↗ |
| The Miller Family Trust | $1.4M | Jan 9, 2026 | filing ↗ |
| Polit Javier | $482K | Dec 30, 2025 | filing ↗ |
| Polit Javier | $1.8M | Dec 29, 2025 | filing ↗ |
| Wilcox William Richard | $2.2M | Nov 7, 2025 | filing ↗ |
| Barbre Tiffany Marie | $1.2M | Oct 24, 2025 | filing ↗ |
| Adamo Claudine | $2.5M | Oct 24, 2025 | filing ↗ |
| Frates Caton | $1.4M | Sep 29, 2025 | filing ↗ |
| The Miller Family Trust | $3.1M | Sep 29, 2025 | filing ↗ |
| Teresa A. Jones | $595K | Aug 20, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Jul 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 7, 2026 | filing ↗ |
| Earnings (2.02) | May 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Other events (8.01) | Apr 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 15, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jan 15, 2026 | filing ↗ |
| Other events (8.01) | Jan 15, 2026 | filing ↗ |
| Earnings (2.02) | Dec 11, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 11, 2025 | filing ↗ |
| Other events (8.01) | Oct 15, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 15, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 14, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 14, 2025 | filing ↗ |
| Earnings (2.02) | Sep 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 25, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 4, 2025 | filing ↗ |