24 insiders reported 106 Form 4 transactions for COSTCO WHOLESALE CORP /NEW (COST) over the past 18 months (most recent 2026-07-14). Recent activity: RAIKES JEFFREY S (Director) Sell 5,249 shares, DENMAN KENNETH D (Director) Sell 885 shares, MILLERCHIP GARY (Executive Vice President) Sell 1,154 shares, George Sarah Catherine (Executive Vice President) Sell 642 shares, Adamo Claudine (Executive Vice President) Sell 730 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-14 | RAIKES JEFFREY S | Director | Sell | 5,249 | $0 |
| 2026-06-25 | DENMAN KENNETH D | Director | Sell | 885 | $847,345 |
| 2026-03-13 | MILLERCHIP GARY | Executive Vice President | Sell | 1,154 | $1.1M |
| 2026-03-13 | George Sarah Catherine | Executive Vice President | Sell | 642 | $636,486 |
| 2026-03-11 | Adamo Claudine | Executive Vice President | Sell | 730 | $732,205 |
| 2026-01-28 | Jones Teresa A. | Executive Vice President | Sell | 300 | $0 |
| 2026-01-28 | RAIKES JEFFREY S | Director | Sell | 5,115 | $0 |
| 2026-01-23 | Jones Teresa A. | Executive Vice President | Sell | 850 | $838,321 |
| 2026-01-20 | DECKER SUSAN L | Director | Sell | 458 | $437,390 |
| 2026-01-20 | Raimondo Gina Marie | Director | Buy | 215 | $0 |
| 2026-01-15 | Klauer James C | Executive Vice President | Sell | 1,500 | $1.4M |
| 2026-01-12 | Miller Russell D | Sr. Executive Vice President | Sell | 1,500 | $1.4M |
| 2025-12-31 | POLIT JAVIER | Executive Vice President | Sell | 2,049 | $1.8M |
| 2025-12-31 | POLIT JAVIER | Executive Vice President | Sell | 558 | $481,766 |
| 2025-12-22 | DENMAN KENNETH D | Director | Sell | 325 | $0 |
| 2025-12-17 | DECKER SUSAN L | Director | Sell | 2,827 | $0 |
| 2025-11-12 | Wilcox William Richard | Executive Vice President | Sell | 2,400 | $2.2M |
| 2025-11-12 | RAIKES JEFFREY S | Director | Sell | 4,120 | $0 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 122 | $115,043 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 97 | $91,577 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 199 | $187,698 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 177 | $166,887 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 111 | $104,453 |
| 2025-10-24 | Adamo Claudine | Executive Vice President | Sell | 2,700 | $2.5M |
| 2025-10-24 | Barbre Tiffany Marie | Insider | Buy | 2,118 | $0 |
Source: SEC Form 4 filings · as of 2026-07-14