Who
Richard Roy Grisenthwaite
Chief Architect
Company insider
Files Form 4 as: Chief Architect, Arm Holdings.
In numbers
- Trades disclosed
- 30
- Buys
- 0
- Sells
- 1
- Bought
- $0
- Sold
- $10.2M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 15 May 2026
- Last trade
- 18 May 2026
- Last filed
- 19 May 2026
Companies traded
Activity over time
1 May – 1 Oct
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 18 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Sold | $5.1M24,339 at $209.15 | filing |
| 18 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Sold | $5.1M24,339 at $209.15 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code A | —5,217 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code A | —6,648 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code A | —34,785 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —2,046 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —14,595 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —1,631 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —4,352 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code M | —2,046 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code M | —14,595 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code A | —6,648 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code A | —34,785 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —2,046 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —14,595 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —1,631 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm Holdingsoption or derivative · Semiconductors | SEC FORM 4 Code M | —4,352 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code A | —4,158 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code M | —1,631 | filing |
| 15 May 2026filed 19 May 2026 | ARM Arm HoldingsSemiconductors | SEC FORM 4 Code A | —13,315 | filing |
News
Delaware Jury Verdict Hammers Arm Holdings (NASDAQ: ARM) And AMD (NASDAQ: AMD) 5% Lower As Chip Sector Selloff DeepensARM · foreignpolicyjournal.com · 19 Oct 2026ARM (NASDAQ:ARM) Stock Price Down 4.1% – Time to Sell?ARM · dailypolitical.com · 12 Oct 2026
0 headlines in the last 90 days name Richard Roy Grisenthwaite; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.