[Form 4] ARM HOLDINGS PLC /UK Insider Trading Activity
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
ARM Holdings plc Chief Commercial Officer William Abbey reported multiple equity compensation events and related share sales. On May 15, 2026, he exercised restricted stock units and received new awards, then sold 7,000 Ordinary Shares in an open-market transaction at about $212.55 per share and had 15,317 shares withheld to cover taxes.
Following the reported transactions, Abbey directly held 57,394 Ordinary Shares. The filing also reports previously delinquent open-market sales of 1,577 shares at $199.00 and 1,577 shares at $221.99, which were executed under a Rule 10b5-1 trading plan.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Net Seller: 10,154 shares ($2,151,751)
Net Sell
14 txns
Insider
Abbey William
Role
Chief Commercial Officer
Sold
10,154 shs ($2.15M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Grant/Award | Restricted Stock Units | 5,566 | $0.00 | -- |
| Exercise | Restricted Stock Units | 1,751 | $0.00 | -- |
| Exercise | Restricted Stock Units | 1,743 | $0.00 | -- |
| Exercise | Restricted Stock Units | 4,706 | $0.00 | -- |
| Grant/Award | Ordinary Shares | 4,466 | $0.00 | -- |
| Exercise | Ordinary Shares | 1,751 | $0.00 | -- |
| Grant/Award | Ordinary Shares | 4,444 | $0.00 | -- |
| Exercise | Ordinary Shares | 1,743 | $0.00 | -- |
| Grant/Award | Ordinary Shares | 14,400 | $0.00 | -- |
| Exercise | Ordinary Shares | 4,706 | $0.00 | -- |
| Tax Withholding | Ordinary Shares | 15,317 | $209.16 | $3.20M |
| Sale | Ordinary Shares | 7,000 | $212.55 | $1.49M |
| Sale | Ordinary Shares | 1,577 | $221.99 | $350K |
| Sale | Ordinary Shares | 1,577 | $199.00 | $314K |
Holdings After Transaction:
Restricted Stock Units — 56,182 shares (Direct, null);
Ordinary Shares — 52,667 shares (Direct, null)
Footnotes (1)
- 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. 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. Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. 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. 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. 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. 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. This RSU award was granted on May 23, 2023 and vested on May 15, 2026. Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs. Represents weighted average sales price. The shares were sold at prices ranging from $212.51 to $212.76. 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. The Reporting Person is hereby disclosing delinquent transactions reportable on Form 4 that were not reported due to an inadvertent oversight. These shares were sold pursuant to a 10b5-1 trading plan. 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.
Key Figures
Shares sold May 15, 2026: 7,000 shares
Total shares sold in reported sales: 10,154 shares
Tax-withheld shares: 15,317 shares
+3 more
6 metrics
Shares sold May 15, 2026
7,000 shares
Open-market sale of Ordinary Shares at about $212.55 each
Total shares sold in reported sales
10,154 shares
Net sell shares across three open-market transactions
Tax-withheld shares
15,317 shares
Ordinary Shares withheld to satisfy tax obligations on RSU vesting
Shares held after transactions
57,394 shares
Direct Ordinary Share holdings following reported Form 4 activity
New RSU grant size
5,566 RSUs
Performance-based RSUs granted effective May 15, 2026
Key sale prices
$199.00, $212.55, $221.99
Per-share prices for reported open-market Ordinary Share sales
Key Terms
Restricted Stock Units, Rule 10b5-1 trading plan, performance-based RSUs, American Depositary Shares, +1 more
5 terms
Restricted Stock Units financial
"Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026"
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.
Rule 10b5-1 trading plan regulatory
"These shares were sold pursuant to a 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
performance-based RSUs financial
"Represents performance-based RSUs granted on May 13, 2024, which vested on May 15, 2026"
Performance-based restricted stock units (RSUs) are promises to deliver company shares to employees only if the business meets specific goals, such as revenue, profit, stock-price targets, or strategic milestones. For investors, they matter because they change future share supply and align management incentives with company results—like a salesperson whose bonus only pays out when sales targets are hit—so they can affect earnings, dilution, and confidence in leadership.
tax withholding requirements financial
"Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs"
