Collins Spencer (CIK 1999165) reported 15 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-21). Recent activity: Sell ARM (40,941 shares), Buy ARM (10,668 shares), Buy ARM (4,184 shares), Buy ARM (3,950 shares), Buy ARM (10,071 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 40,941 | $8.8M |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Buy | 10,668 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Buy | 4,184 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Buy | 3,950 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Buy | 10,071 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Buy | 48,378 | $0 |
| 2026-05-19 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 36,310 | $7.6M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 836 | $173,696 |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 1,849 | $385,849 |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 5,353 | $1.1M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 9,815 | $2.1M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 10,674 | $2.3M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 11,197 | $2.4M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 7,371 | $1.6M |
| 2026-05-13 | ARM HOLDINGS PLC /UK (ARM) | Chief Legal Officer | Sell | 4,866 | $1.0M |
Source: SEC Form 4 filings · as of 2026-05-21