Costco (COST) — insider trading
Consumer Staples · NASDAQ
Costco (COST) has 26 reported SEC Form 4 insider transactions in our data, including 7 open-market sales among the most recent 26 (latest 2026-09-29).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-29 | Frates Caton | Officer (Sr. Executive Vice President) | Open-market sale | 801 | $915.93 | $733.3K | Form 4 |
| 2026-09-29 | Adamo Claudine | Officer (Executive Vice President) | Open-market sale | 2,200 | $915.93 | $2.02M | Form 4 |
| 2026-09-10 | Wilcox William Richard | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,935 | $902.38 | $1.75M | Form 4 |
| 2026-09-10 | Wilcox William Richard | Officer (Executive Vice President) | Grant / award / vesting | 4,129 | — | $0 | Form 4 |
| 2026-09-10 | Rubanenko Yoram | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,696 | $902.38 | $1.53M | Form 4 |
| 2026-09-10 | Rubanenko Yoram | Officer (Executive Vice President) | Grant / award / vesting | 4,129 | — | $0 | Form 4 |
| 2026-09-10 | Riel Pierre | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,562 | $902.38 | $1.41M | Form 4 |
| 2026-09-10 | Riel Pierre | Officer (Executive Vice President) | Grant / award / vesting | 4,552 | — | $0 | Form 4 |
| 2026-09-10 | Klauer James C | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 936 | $902.38 | $844.7K | Form 4 |
| 2026-09-10 | Klauer James C | Officer (Executive Vice President) | Grant / award / vesting | 4,129 | — | $0 | Form 4 |
| 2026-09-10 | Jones Teresa A. | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,459 | $902.38 | $1.32M | Form 4 |
| 2026-09-10 | Jones Teresa A. | Officer (Executive Vice President) | Grant / award / vesting | 4,129 | — | $0 | Form 4 |
| 2026-09-10 | Frates Caton | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,654 | $902.38 | $1.49M | Form 4 |
| 2026-09-10 | Frates Caton | Officer (Executive Vice President) | Grant / award / vesting | 4,552 | — | $0 | Form 4 |
| 2026-09-10 | Adamo Claudine | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 917 | $902.38 | $827.2K | Form 4 |
| 2026-09-10 | Adamo Claudine | Officer (Executive Vice President) | Grant / award / vesting | 4,129 | — | $0 | Form 4 |
| 2026-07-10 | RAIKES JEFFREY S | Director | Bona fide gift | 5,249 | — | $0 | Form 4 |
| 2026-06-23 | DENMAN KENNETH D | Director | Open-market sale | 885 | $957.45 | $847.3K | Form 4 |
| 2026-04-01 | Frates Caton | Officer (Executive Vice President) | Open-market sale | 700 | $993.00 | $695.1K | Form 4 |
| 2026-03-12 | George Sarah Catherine | Officer (Executive Vice President) | Discretionary transaction | 642 | $991.21 | $636.5K | Form 4 |
| 2026-03-11 | MILLERCHIP GARY | Officer (Executive Vice President) | Shares withheld for taxes / exercise cost | 1,154 | $992.23 | $1.15M | Form 4 |
| 2026-03-09 | Adamo Claudine | Officer (Executive Vice President) | Open-market sale | 730 | $1,003.02 | $732.2K | Form 4 |
| 2026-01-27 | Jones Teresa A. | Officer (Executive Vice President) | Bona fide gift | 300 | — | $0 | Form 4 |
| 2026-01-27 | RAIKES JEFFREY S | Director | Bona fide gift | 5,115 | — | $0 | Form 4 |
| 2026-01-21 | Jones Teresa A. | Officer (Executive Vice President) | Open-market sale | 850 | $986.26 | $838.3K | Form 4 |
| 2026-01-16 | DECKER SUSAN L | Director | Open-market sale | 458 | $955.00 | $437.4K | Form 4 |
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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Costco (COST).
Last updated 2026-09-29 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.