Grisenthwaite Richard Roy
SEC insider (Form 3/4/5 filer). CIK 0002112445. Chief Architect at ARM HOLDINGS PLC /UK (ARM). 9 reported Form 4/5 transactions since Sep 2024; latest on May 18, 2026. Located in CAMBRIDGE.
Companies Grisenthwaite Richard Roy has filed insider reports for
- ARM HOLDINGS PLC /UK (ARM): Officer, Chief Architect
Grisenthwaite Richard Roy
CIK: 0002112445
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
ARM HOLDINGS PLC /UK
Discretionary Trading P&L
Holdings
Transaction History (9 total)
- May 18, 2026ARM
ARM HOLDINGS PLC /UK
SaleDirect24.3K shares at avg. $209.15$5.1M - May 15, 2026ARM
ARM HOLDINGS PLC /UK
ExerciseDirect2K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
ExerciseDirect14.6K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
AwardDirect4.2K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
AwardDirect5.2K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
AwardDirect13.3K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
ExerciseDirect4.4K shares- - May 15, 2026ARM
ARM HOLDINGS PLC /UK
Tax PaymentDirect21.3K shares at avg. $209.16$4.5M - May 15, 2026ARM
ARM HOLDINGS PLC /UK
ExerciseDirect1.6K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 18, 2026 | ARM ARM HOLDINGS PLC /UK | Sale | 24,339 | $209.15 | $5,090,502 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Exercise | 2,046 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Exercise | 14,595 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Award | 4,158 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Award | 5,217 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Award | 13,315 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Exercise | 4,352 | - | $0 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Tax Payment | 21,301 | $209.16 | $4,455,317 | Direct |
| May 15, 2026 | ARM ARM HOLDINGS PLC /UK | Exercise | 1,631 | - | $0 | Direct |
1-9 of 9 transactions