Benjamin Carson Sr. is Director at COSTCO WHOLESALE CORP /NEW (COST). They have made 7 open-market trades across 2 companies since 2006, most recently 2026-06-04.
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 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| K | SELL | 2014-08-11 | 2014-08-12 | $63.96 | $314K | -1.0% | +0.0% | +0.0% |
| COST | SELL | 2014-06-17 | 2014-06-17 | $115.68 | $1.3M | -4.8% | -0.2% | -0.2% |
| K | SELL | 2013-11-06 | 2013-11-08 | $63.38 | $309K | -1.0% | +0.0% | +0.0% |
| COST | SELL | 2012-12-14 | 2012-12-17 | $97.42 | $1.2M | -4.8% | -0.2% | -0.2% |
| K | SELL | 2010-05-06 | 2010-05-10 | $54.00 | $788K | -1.0% | +0.0% | +0.0% |
| K | SELL | 2009-11-18 | 2009-11-19 | $53.04 | $256K | -1.0% | +0.0% | +0.0% |
| COST | SELL | 2006-04-27 | 2006-04-27 | $54.62 | $655K | -4.8% | -0.2% | -0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.