COST Insider Trading Activity and SEC Form 4 Filings
Trump's trades in COST
From his financial disclosures
$1.7M+
20 purchases
$1.4M+
11 sales
Purchase
Aug 24, 2026
Reported 45d later
$1K - $15K
Purchase
Aug 17, 2026
Reported 52d later
$1K - $15K
Sale
Aug 10, 2026
Reported 59d later
$1K - $15K
Purchase
Jul 27, 2026
Reported 57d later
$100K - $250K
Sale
Jul 24, 2026
Reported 60d later
$1K - $15K
Sale
Jul 23, 2026
Reported 61d later
$100K - $250K
Many orders in these accounts are placed by the account manager. See all 31 trades
COST insider trading summary
Over the past 12 months, insiders at Costco Wholesale Corp /New (COST) reported 12 sales worth $13.8M by 8 insiders and no open-market purchases on SEC Form 4. Net insider selling was $13.8M.
Latest COST insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Oct 13, 2026 | William Richard Wilcox | Executive Vice President | Sell | $1.1M (1,100 @ $958.21) |
| Sep 29, 2026 | Claudine Adamo | Executive Vice President | Sell | $2.0M (2,200 @ $915.93) |
| Sep 29, 2026 | Caton Frates | Sr. Executive Vice President | Sell | $733K (800.638 @ $915.93) |
| Apr 1, 2026 | Caton Frates | Executive Vice President | Sell | $695K (700 @ $993.00) |
| Mar 9, 2026 | Claudine Adamo | Executive Vice President | Sell | $732K (730 @ $1003.02) |
| Jan 21, 2026 | Teresa A. Jones | Executive Vice President | Sell | $838K (850 @ $986.26) |
| Jan 16, 2026 | Susan L Decker | Director | Sell | $437K (458 @ $955.00) |
| Jan 14, 2026 | James C Klauer | Executive Vice President | Sell | $1.4M (1,500 @ $939.00) |
| Jan 9, 2026 | Russell D Miller | Sr. Executive Vice President | Sell | $1.4M (1,500 @ $916.32) |
| Dec 30, 2025 | Javier Polit | Executive Vice President | Sell | $482K (558.305 @ $862.89) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.