Richard Roy Grisenthwaite
Chief Architect · ARM HOLDINGS PLC /UK
IndividualSelling only
- 2026
- May 19, 2026
- 1
Filings (90d)
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.
- Jason Child - $19.99M in ARM purchases and sales in the last 12 months
- Spencer Collins - $19.80M in ARM purchases and sales in the last 12 months
- William Abbey - $12.02M in ARM purchases and sales in the last 12 months
- Rene A. Haas - $6.63M in ARM purchases and sales in the last 12 months
- Laura Kathleen Bartels - $4.44M in ARM purchases and sales in the last 12 months
- Charlotte Claire Eaton - $4.18M in ARM purchases and sales in the last 12 months
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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.
