Costco Wholesale Corp /new (COST) insider trading
Every open-market stock purchase and sale by Costco Wholesale Corp /new executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Consumer Staples.
Insider activity at a glance
- Claudine Adamo (President) and 2 others sold $3.8M in the last 90 days.
- Last company insider buy: Mary Agnes Wilderotter (Board member), $400K, 4 years ago.
- Congress: 3 members traded it in the last 90 days (4 sales). Latest: Pete Sessions sold $100K to $250K, 3 weeks ago.
Last 12 months: insiders bought $0 (0 buys) and sold $14.6M (12 sales). Last close $1,012 on Oct 30, 2026.
Recent COST insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 22, 2026 | Roland Michael Vachris (CEO) | Sold (not open market) | $1.4M |
| Oct 22, 2026 | Roland Michael Vachris (CEO) | Sold (not open market) | $1.2M |
| Oct 22, 2026 | Roland Michael Vachris (CEO) | Sold (not open market) | $1.1M |
| Oct 22, 2026 | John Christopher Sullivan (VP) | Sold (not open market) | $993K |
| Oct 22, 2026 | John Christopher Sullivan (VP) | Sold (not open market) | $851K |
| Oct 22, 2026 | Gary Millerchip (President) | Sold (not open market) | $832K |
| Oct 22, 2026 | John Christopher Sullivan (VP) | Sold (not open market) | $746K |
| Oct 22, 2026 | John Christopher Sullivan (VP) | Sold (not open market) | $659K |
| Oct 22, 2026 | John Christopher Sullivan (VP) | Sold (not open market) | $583K |
| Oct 22, 2026 | Javier Polit (President) | Sold (not open market) | $559K |
| Oct 22, 2026 | James C Klauer (President) | Sold (not open market) | $552K |
| Oct 22, 2026 | James C Klauer (President) | Sold (not open market) | $540K |
| Oct 22, 2026 | Gary Millerchip (President) | Sold (not open market) | $509K |
| Oct 22, 2026 | James C Klauer (President) | Sold (not open market) | $451K |
| Oct 22, 2026 | James C Klauer (President) | Sold (not open market) | $403K |
| Oct 22, 2026 | Javier Polit (President) | Sold (not open market) | $398K |
| Oct 22, 2026 | Javier Polit (President) | Sold (not open market) | $343K |
| Oct 22, 2026 | Gary Millerchip (President) | Sold (not open market) | $319K |
| Oct 22, 2026 | Javier Polit (President) | Sold (not open market) | $300K |
| Oct 22, 2026 | Claudine Adamo (President) | Sold (not open market) | $202K |
| Oct 22, 2026 | James C Klauer (President) | Sold (not open market) | $194K |
| Oct 22, 2026 | Claudine Adamo (President) | Sold (not open market) | $180K |
| Oct 22, 2026 | Tiffany Marie Barbre (Insider) | Sold (not open market) | $169K |
| Oct 22, 2026 | Claudine Adamo (President) | Sold (not open market) | $113K |
| Oct 22, 2026 | Claudine Adamo (President) | Sold (not open market) | $111K |
Who's trading COST
- Sarah Catherine George, President: other filings, last Oct 22, 2026
- Tiffany Marie Barbre, Insider: other filings, last Oct 22, 2026
- Susan L Decker, Director: sold $437K (1 sale), last Oct 22, 2026
- Kenneth D Denman, Director: sold $847K (1 sale), last Oct 22, 2026
- Helena Foulkes, Director: other filings, last Oct 22, 2026
- Claudine Adamo, President: sold $2.7M (2 sales), last Oct 22, 2026
- Hamilton E James, Director: other filings, last Oct 22, 2026
- Sarah Mr Sally Jewell, Director: other filings, last Oct 22, 2026
- James C Klauer, President: sold $1.4M (1 sale), last Oct 22, 2026
- Gary Millerchip, President: other filings, last Oct 22, 2026
- Javier Polit, President: sold $2.3M (2 sales), last Oct 22, 2026
- Jeffrey S Raikes, Director: other filings, last Oct 22, 2026
- Gina Marie Raimondo, Director: other filings, last Oct 22, 2026
- John W Stanton, Director: other filings, last Oct 22, 2026
- Adam Webb Self, President: other filings, last Oct 22, 2026
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