ARM insider sells 24,339 shares after RSU vesting
ARM Holdings Chief Architect Richard Roy Grisenthwaite reported a set of equity compensation events and a share sale.
Rhea-AI Filing Summary
ARM Holdings Chief Architect Richard Roy Grisenthwaite reported a set of equity compensation events and a share sale. On May 15, 2026, multiple performance-based restricted stock units vested and were converted into Ordinary Shares held as American Depositary Shares, while 21,301 Ordinary Shares were withheld to cover tax obligations on these RSU vestings. He also received new RSU awards, including 34,785 performance-based RSUs and 6,648 RSUs with future vesting schedules. On May 18, 2026, he executed an open-market sale of 24,339 Ordinary Shares at a weighted average price of about $209.15 per share, leaving no directly held Ordinary Shares after the sale.
Positive
- None.
Negative
- None.
Insider Trade Summary
Exercise and sale activity reported; no spread calculated
Exercise and Sale
15 txns
Insider
Grisenthwaite Richard Roy
Role
Chief Architect
Sold
24,339 shs ($5.09M)
Approx. gross sale proceeds
$5.09M
Approx. exercise cost
$0.00
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Ordinary Shares | 24,339 | $209.15 | $5.09M |
| Grant/Award | Restricted Stock Units | 6,648 | $0.00 | $0.00 |
| Grant/Award | Restricted Stock Units | 34,785 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 2,046 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 14,595 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 1,631 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 4,352 | $0.00 | $0.00 |
| Grant/Award | Ordinary Shares | 5,217 | $0.00 | $0.00 |
| Exercise | Ordinary Shares | 2,046 | $0.00 | $0.00 |
| Exercise | Ordinary Shares | 14,595 | $0.00 | $0.00 |
| Grant/Award | Ordinary Shares | 4,158 | $0.00 | $0.00 |
| Exercise | Ordinary Shares | 1,631 | $0.00 | $0.00 |
| Grant/Award | Ordinary Shares | 13,315 | $0.00 | $0.00 |
| Exercise | Ordinary Shares | 4,352 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Ordinary Shares | 21,301 | $209.16 | $4.46M |
Holdings After Transaction:
Restricted Stock Units — 118,443 contracts (Direct);
Ordinary Shares — 0 shares (Direct)
Footnotes (12)
- F1. Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share.
- F2. Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee (the "Remuneration Committee") of the Board of Directors of the Company.
- F3. Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.
- F4. This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.
- F5. Represents performance-based RSUs granted on May 13, 2024, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee.
- F6. This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company.
- F7. Represents performance-based RSUs granted on May 23, 2023, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee.
- F8. This RSU award was granted on May 23, 2023 and vested on May 15, 2026.
- F9. Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs.
- F10. Represents weighted average sales price. The shares were sold at prices ranging from $209.03 to $209.66. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price
- F11. This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company.
- F12. This RSU award was granted effective May 15, 2026. 50% will vest on each of May 15, 2028 and May 15, 2029, subject to continued service to the Company.
Key Figures
Open-market sale: 24,339 shares at $209.15
Shares after sale: 0 Ordinary Shares
Tax withholding: 21,301 shares
+4 more
7 metrics
Open-market sale
24,339 shares at $209.15
Ordinary Shares sold on May 18, 2026
Shares after sale
0 Ordinary Shares
Direct holdings following May 18, 2026 sale
Tax withholding
21,301 shares
Ordinary Shares withheld for RSU tax obligations on May 15, 2026
RSU exercises
22,624 shares
Total shares from derivative exercises (M code) in summary
Performance RSU grant
34,785 RSUs
Performance-based RSUs granted effective May 15, 2026
Additional RSU grant
6,648 RSUs
RSUs granted effective May 15, 2026
Net share direction
-24,339 shares
Net buy/sell shares in transaction summary (net-sell)
Key Terms
Restricted Stock Units, performance-based restricted stock units, Remuneration Committee, American Depositary Shares, +2 more
6 terms
Restricted Stock Units financial
"security_title": "Restricted Stock Units""
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
performance-based restricted stock units financial
"Represents performance-based restricted stock units granted on May 1, 2025"
Performance-based restricted stock units are a type of employee equity award that converts into company shares only if predefined financial or operational targets are met over a set period. Think of it like a bonus check that becomes stock only when specific goals are hit; it ties pay to results, aligning managers’ incentives with shareholders. Investors care because these awards affect future share count, executive incentives, and signal how management’s success will be measured and rewarded.
Remuneration Committee financial
"following certification of the satisfaction of certain performance conditions by the Remuneration Committee"
A remuneration committee is a group of independent board members who design, approve and oversee pay packages for a company’s executives and directors. Think of them as the household budget planners for top management: they decide salaries, bonuses and stock awards so pay rewards performance and limits excessive risk. For investors, their role matters because compensation policies affect management incentives, business strategy and the long‑term value shareholders receive.
tax withholding requirements financial
"Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs."
weighted average sales price financial
"Represents weighted average sales price. The shares were sold at prices"
FAQ
What insider transactions did ARM (ARM) report for Richard Roy Grisenthwaite?
ARM reported RSU-related activity and a share sale for Chief Architect Richard Roy Grisenthwaite. RSUs vested and converted into Ordinary Shares, some shares were withheld for taxes, and 24,339 Ordinary Shares were sold in an open-market transaction at a weighted average price around $209.15.
What tax-withholding transaction occurred in the ARM (ARM) Form 4 filing?
21,301 Ordinary Shares were withheld to satisfy tax withholding requirements on vesting of restricted stock units. This tax-withholding disposition did not represent an open-market sale; it reflects shares delivered to cover tax liabilities tied to RSU vesting.
What new restricted stock unit (RSU) awards did ARM (ARM) grant to Grisenthwaite?
He received new RSU grants totaling tens of thousands of units, including 34,785 performance-based RSUs and 6,648 RSUs. These awards were effective May 15, 2026 and are scheduled to vest between 2027 and 2029, subject to continued service and performance conditions.
AI-generated analysis. How Rhea-AI works. Not financial advice.
