COSTCO WHOLESALE CORP /NEW insider buying and selling
10 Form 4 filings against COSTCO WHOLESALE CORP /NEW (COST) in the last 90 days. Below are the transactions from 4 recent filings, one per insider where the window allows, as filed.
| Date | Insider | Role | Transaction | Code | Shares | Price | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-29 | Frates Caton | Sr. Executive Vice President | open-market sale | S | 801 | $915.93 | 7,912 |
| 2026-09-29 | Adamo Claudine | Executive Vice President | open-market sale | S | 2,200 | $915.93 | 7,134 |
| 2026-09-10 | Wilcox William Richard | Executive Vice President | grant/award | A | 4,129 | 6,129 | |
| 2026-09-10 | Wilcox William Richard | Executive Vice President | tax withholding | F | 1,935 | $902.38 | 4,194 |
| 2026-09-10 | Rubanenko Yoram | Executive Vice President | grant/award | A | 4,129 | 12,376 | |
| 2026-09-10 | Rubanenko Yoram | Executive Vice President | tax withholding | F | 1,696 | $902.38 | 10,680 |
What the filings show
Across the 4 filings read here, 4 insiders at COSTCO WHOLESALE CORP /NEW (COST) reported 2 open-market sales of 3,000.638 shares worth about $2.7M.
The largest by value was Adamo Claudine (Executive Vice President), with about $2.0M sold on the open market.
10 Form 4 filings were made against COSTCO WHOLESALE CORP /NEW in the 90 days to October 9, 2026; the paid report reads all of them.
The Form 4 flow against COSTCO WHOLESALE CORP /NEW, parsed and explained
The free view above is the newest few filings. The paid report reads the newest Form 4 filings of the last 90 days (up to 100), separates open-market buys and sales from awards, exercises and tax withholding, totals the flow per insider, flags 10b5-1 plans where the filing notes them, and hands you a cited write-up plus a downloadable transactions table.
Generated from public SEC EDGAR filings. Filing data is shown as filed. This is information, not investment advice.