Insider · CIK 0002075341
William George Brumder
Files at GPRO (GoPro, Inc.). First filing Sep 26, 2025, latest Sep 26, 2025.
In brief
William George Brumder files SEC Form 4 as 10% owner at GPRO (GoPro, Inc.). Since Sep 26, 2025, William George Brumder has reported 0 open-market buys worth $0 and 1 open-market sell worth $30k, the latest filed on Sep 26, 2025.
A track record needs three past buys with six months of prices behind them; William George Brumder has 0, so none is measured yet.
The newest scored trade: sold $30k of GPRO on Sep 19, 2025, filed Sep 26, 2025, scored 27 (weak).
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
GPRO: GoPro, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 27Weak | GPROsell GoPro, Inc. | $30k 12,000 shares | -0% | +405% from low-4% from high |
Transactions
Every row this insider has filed, 1 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 19, 2025 | GPRO GoPro, Inc. | SOpen-market sale Class A common stock | -12,000 | $2.49 | $30k | 10,838,000 | Sep 26, 2025 |
Questions about William George Brumder
Answered from the filings on this page, as of the latest one.
Is William George Brumder buying or selling?
Not in the last 12 months. William George Brumder's latest open-market trade on SEC Form 4 was sold $30k of GPRO on Sep 19, 2025.
How did William George Brumder's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and William George Brumder has 0.
Where does William George Brumder file Form 4?
William George Brumder has filed Form 4 at GPRO (GoPro, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.