COSTCO WHOLESALE CORP /NEW (COST) Insider Trading -- Recent Executive & Director Transactions
24 insiders reported 118 Form 4 transactions for COSTCO WHOLESALE CORP /NEW (COST) over the past 18 months (most recent 2026-09-30). Recent activity: Adamo Claudine (Executive Vice President) Sell 2,200 shares, Frates Caton (Sr. Executive Vice President) Sell 801 shares, Riel Pierre (Executive Vice President) Sell 1,562 shares, Rubanenko Yoram (Executive Vice President) Buy 4,129 shares, Adamo Claudine (Executive Vice President) Buy 4,129 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-30 | Adamo Claudine | Executive Vice President | Sell | 2,200 | $2.0M |
| 2026-09-30 | Frates Caton | Sr. Executive Vice President | Sell | 801 | $733,328 |
| 2026-09-14 | Riel Pierre | Executive Vice President | Sell | 1,562 | $1.4M |
| 2026-09-14 | Rubanenko Yoram | Executive Vice President | Buy | 4,129 | $0 |
| 2026-09-14 | Adamo Claudine | Executive Vice President | Buy | 4,129 | $0 |
| 2026-09-14 | Riel Pierre | Executive Vice President | Buy | 4,552 | $0 |
| 2026-09-14 | Frates Caton | Executive Vice President | Buy | 4,552 | $0 |
| 2026-09-14 | Jones Teresa A. | Executive Vice President | Buy | 4,129 | $0 |
| 2026-09-14 | Wilcox William Richard | Executive Vice President | Buy | 4,129 | $0 |
| 2026-09-14 | Klauer James C | Executive Vice President | Sell | 936 | $844,731 |
| 2026-09-14 | Rubanenko Yoram | Executive Vice President | Sell | 1,696 | $1.5M |
| 2026-09-14 | Adamo Claudine | Executive Vice President | Sell | 917 | $827,198 |
| 2026-09-14 | Klauer James C | Executive Vice President | Buy | 4,129 | $0 |
| 2026-09-14 | Frates Caton | Executive Vice President | Sell | 1,654 | $1.5M |
| 2026-09-14 | Jones Teresa A. | Executive Vice President | Sell | 1,459 | $1.3M |
| 2026-09-14 | Wilcox William Richard | Executive Vice President | Sell | 1,935 | $1.7M |
| 2026-07-14 | RAIKES JEFFREY S | Director | Sell | 5,249 | $0 |
| 2026-06-25 | DENMAN KENNETH D | Director | Sell | 885 | $847,343 |
| 2026-04-01 | Frates Caton | Executive Vice President | Sell | 700 | $695,100 |
| 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 |
Source: SEC Form 4 filings · as of 2026-09-30