William George Brumder
10% Owner
IndividualSelling only
- 2025
- Sep 19, 2025
- 1
Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies William George Brumder files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Brian McGee - $181K in GPRO purchases and sales in the last 12 months
- Jason Christopher Stephen - $63K in GPRO purchases and sales in the last 12 months
- Nicholas Woodman - GPRO
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is William George Brumder?
William George Brumder is a corporate insider, tracked as 10% Owner of GoPro, Inc. (GPRO). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did William George Brumder last file a Form 4?
The only primary Form 4 on record is dated 19 September 2025.
Has William George Brumder been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($30K) across all tracked filings.
