COSTCO WHOLESALE CORP /NEW insider trading
COST$920.65+5.71 (+0.62%)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+0.4%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- WCW. Craig Jelinek0.0799%
- PJPatrick J. Callans0.0137%
- HEHamilton E. James0.0128%
- RMRoland Michael Vachris0.0118%
- JCJames C. Klauer0.0109%
- JCJohn Christopher Sullivan0.0107%
- RARichard A. Galanti0.0079%
- JWJohn W. Stanton0.0055%
- GMGary Millerchip0.0035%
- PRPierre Riel0.0032%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| COST | Caton Frates | Open market sell$733K | -9.2% | $915.93 | $733K | Sep 29, 2026 | Sep 30, 2026 |
| COST | Claudine Adamo | Open market sell$2.02M | -23.6% | $915.93 | $2.02M | Sep 29, 2026 | Sep 30, 2026 |
| COST | Kenneth D. Denman | Open market sell$847K | -15.6% | $957.45 | $847K | Jun 23, 2026 | Jun 25, 2026 |
| COST | Caton Frates | Open market sell$695K | -10.7% | $993.00 | $695K | Apr 1, 2026 | Apr 1, 2026 |
| COST | Claudine Adamo | Open market sell$732K | -10.7% | $1,003.02 | $732K | Mar 9, 2026 | Mar 11, 2026 |
| COST | Teresa A. Jones | Open market sell$838K | -16.7% | $986.26 | $838K | Jan 21, 2026 | Jan 23, 2026 |
| COST | Susan L. Decker | Open market sell$437K | -5.1% | $955.00 | $437K | Jan 16, 2026 | Jan 20, 2026 |
| COST | James C. Klauer | Open market sell$1.41M | -3.2% | $939.00 | $1.41M | Jan 14, 2026 | Jan 15, 2026 |
| COST | Russell D. Miller | Open market sell$1.37M | -15.4% | $916.32 | $1.37M | Jan 9, 2026 | Jan 12, 2026 |
| COST | Javier Polit | Open market sell$482K | -5.2% | $862.90 | $482K | Dec 30, 2025 | Dec 31, 2025 |
| COST | Javier Polit | Open market sell$1.78M | -16.0% | $867.21 | $1.78M | Dec 29, 2025 | Dec 31, 2025 |
| COST | William Richard Wilcox | Open market sell$2.23M | -54.6% | $930.13 | $2.23M | Nov 7, 2025 | Nov 12, 2025 |
| COST | Tiffany Marie Barbre | Open market sell$1.16M | -19.4% | $934.62 | $1.16M | Oct 24, 2025 | Oct 24, 2025 |
| COST | Claudine Adamo | Open market sell$2.53M | -28.3% | $935.68 | $2.53M | Oct 24, 2025 | Oct 24, 2025 |