William George Brumder is 10% at GoPro, Inc. (GPRO). They have made 1 open-market trade across 1 company since 2025, most recently 2025-09-19.
CIK 0002075341
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 |
|---|---|---|
| GPRO | 10,838,000 | $11.3M |
Shares reported on the most recent Form 4, priced at the 2025-09-26 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GPRO | SELL | 2025-09-19 | 2025-09-26 | $2.49 | $30K | -4.8% | -8.2% | -31.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.