Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Richard Roy Grisenthwaite 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.
- Spencer Collins - $19.80M of ARM open-market activity in the last 12 months
- Jason Child - $14.22M of ARM open-market activity in the last 12 months
- William Abbey - $12.02M of ARM open-market activity in the last 12 months
- Rene A. Haas - $6.63M of ARM open-market activity in the last 12 months
- Laura Kathleen Bartels - $4.44M of ARM open-market activity in the last 12 months
- Charlotte Claire Eaton - $4.18M of ARM open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Richard Roy Grisenthwaite?
Richard Roy Grisenthwaite is a corporate insider, tracked as Chief Architect of ARM HOLDINGS PLC /UK (ARM). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Richard Roy Grisenthwaite last file a Form 4?
The only primary Form 4 on record is dated 19 May 2026.
Has Richard Roy Grisenthwaite been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($5.09M) across all tracked filings.
Where can I see all of Richard Roy Grisenthwaite's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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