Grisenthwaite Richard Roy (CIK 2112445) reported 9 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-19). Recent activity: Buy ARM (5,217 shares), Buy ARM (2,046 shares), Buy ARM (14,595 shares), Buy ARM (4,158 shares), Buy ARM (1,631 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 5,217 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 2,046 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 14,595 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 4,158 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 1,631 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 13,315 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Buy | 4,352 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Sell | 21,301 | $4.5M |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Architect | Sell | 24,339 | $5.1M |
Source: SEC Form 4 filings · as of 2026-05-19