$COST insider trading
Over the last 12 months, Costco Wholesale insiders reported no purchases and 13 sales totaling $19.0M across SEC Form 4 filings.
- Bought · 12m
- — 0 events
- Sold · 12m
- $19.0M 13 events
- Events · 12m
- 13 Form 4 filings, grouped
- Insiders · 12m
- 10 distinct reporters
- 10b5-1 share
- 0% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jun 23, 2026 | DENMAN KENNETH DD | ▼ Sale | 885 | $957.45 | $847K | -15.6% | — |
| Apr 1, 2026 | Frates CatonExecutive Vice President · O | ▼ Sale | 700 | $993 | $695K | -10.7% | — |
| Mar 9, 2026 | Adamo ClaudineExecutive Vice President · O | ▼ Sale | 730 | $1003.02 | $732K | -10.7% | — |
| Jan 21, 2026 | Jones Teresa A.Executive Vice President · O | ▼ Sale | 850 | $986.26 | $838K | -16.7% | — |
| Jan 16, 2026 | DECKER SUSAN LD | ▼ Sale | 458 | $955 | $437K | -5.1% | — |
| Jan 14, 2026 | Klauer James CExecutive Vice President · O | ▼ Sale | 1,500 | $939 | $1.4M | -3.2% | — |
| Jan 9, 2026 | Miller Russell DSr. Executive Vice President · O | ▼ Sale | 1,500 | $916.32 | $1.4M | -15.4% | indirect |
| Dec 30, 2025 | POLIT JAVIERExecutive Vice President · O | ▼ Sale | 2,607.305 | $866.28 | $2.3M | -20.4% | 2 tranches |
| Nov 7, 2025 | Wilcox William RichardExecutive Vice President · O | ▼ Sale | 2,400 | $930.13 | $2.2M | -54.5% | — |
| Oct 24, 2025 | Barbre Tiffany Marie | ▼ Sale | 1,239.383 | $934.62 | $1.2M | -19.4% | — |
| Oct 24, 2025 | Adamo ClaudineExecutive Vice President · O | ▼ Sale | 2,700 | $935.68 | $2.5M | -28.3% | — |
| Sep 29, 2025 | Miller Russell DSr. Executive Vice President · O | ▼ Sale | 3,381 | $915 | $3.1M | -25.8% | indirect |
| Sep 29, 2025 | Frates CatonExecutive Vice President · O | ▼ Sale | 1,540 | $910.02 | $1.4M | -14.2% | — |
| Aug 20, 2025 | Jones Teresa A.Executive Vice President · O | ▼ Sale | 600 | $992.05 | $595K | -20.3% | — |
Every $COST filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Costco Wholesale filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $COST feed.