Tiffany Marie Barbre files SEC Form 4 disclosures for COSTCO WHOLESALE CORP /NEW. They have made 1 open-market trade across 1 company since 2025, most recently 2025-10-24.
CIK 0002076006
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| COST | 5,155 | $5.1M |
Shares reported on the most recent Form 4, priced at the 2025-10-24 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| COST | SELL | 2025-10-24 | 2025-10-24 | $934.91 | $2.3M | +0.5% | -4.7% | +4.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.