Grisenthwaite Richard Roy — SEC Form 4 Insider Trading Activity
Summary
Updated Jul 16, 2026
Grisenthwaite Richard Roy has filed 1 SEC Form 4 filing across 1 company in the last 90 days — selling. Lifetime open-market sales: $5.09M.
Profile
Richard Roy Grisenthwaite (often listed in records as Grisenthwaite Richard Roy) is identified in SEC filings as holding the role of Chief Architect at ARM Holdings plc (UK) as of the filing dated 2026-05-19. Beyond this role, there is limited publicly available biographical information about Grisenthwaite in widely accessible sources. Based on the SEC context, the individual is associated with high-level architecture and processor design leadership at ARM; specific career history, education, or notable achievements are not publicly documented in the provided context. The name appears in a UK semiconductor company setting, suggesting a technical leadership position focused on architecture strategy for ARM’s processor designs, but details beyond the role and company are not confirmed in this context.
Role
Chief Architect
Notability
25/100
Board memberships
ARM Holdings plc
Awards & honors
No publicly documented achievements beyond the Chief Architect role in the provided SEC context.
Richard Roy Grisenthwaite (often listed in records as Grisenthwaite Richard Roy) is identified in SEC filings as holding the role of Chief Architect at ARM Holdings plc (UK) as of the filing dated 2026-05-19. Beyond this role, there is limited publicly available biographical information about Grisenthwaite in widely accessible sources. Based on the SEC context, the individual i…
How many SEC Form 4 filings has Grisenthwaite Richard Roy submitted recently?
1 primary Form 4 filings in the last 90 days, covering 1 company.
Has Grisenthwaite Richard Roy been buying or selling stock?
Recorded transactions: 0 open-market purchases () and 1 open-market sales ($5.09M) across all tracked filings.
Where can I see all of Grisenthwaite Richard Roy'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.
