Key facts
- William George Brumder II has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $26,986,620.
- Recent insider filing activity is available below.
Insider Trading & Ownership of William George Brumder II
- Location
- New York, NY
- Summary
- The estimated net worth of William George Brumder II is at least $26,986,620 dollars as of 26 Sep 2025. William George Brumder II is the 10%+ Owner of GoPro, Inc. and owns shares of GoPro, Inc. (GPRO) stock worth about $26.99M.
- Signature
- /s/ William George Brumder II
- All Insider Reports
- All Insider Reports
Follow Filing Activity
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Change
- Largest disclosed position: GoPro, Inc. ($26,986,620).
- Past-year value change for that position: -$29,880.
Research use
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of William George Brumder II
GPRO
Forms 3/4/5
GoPro, Inc.
- Relationship
- 10%+ Owner
- Holdings value
- $26,986,620
- Past year net change
- -$29,880
- Change %
- -0.11%
- Report period
- 19 Sep 2025
Insider Transactions Reported by William George Brumder II:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.