William George Brumder
CIK 2075341 · View on SEC EDGAR ↗
Insider
First SEC filing: Sept. 26, 2025 · Latest: Sept. 26, 2025
On this page
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-29,880
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 19, 2025 | GPRO | S | 12,000 | $2.49 | $29,880 | 10,838,000 Direct | -0.11% | Disposed | -74.5% (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 7 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 26, 2025 | GPRO | Class A common stock | 10,850,000 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (300,000) | 300,000 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (488,400) | 488,400 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (50,000) | 50,000 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (50,000) | 50,000 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (90,000) | 90,000 | Direct |
| Sept. 26, 2025 | GPRO | Call Option (right to buy)→ Class A common stock (1,370,200) | 1,370,200 | Direct |