Transactions
15
Insider / ARM HOLDINGS PLC /UK
Grisenthwaite Richard Roy
Chief Architect at ARM HOLDINGS PLC /UK
- Company
- ARM HOLDINGS PLC /UK
- Ticker
- ARM
- First filing on record
- May 19, 2026
- Latest trade on record
- May 18, 2026
- SEC filings
- EDGAR ↗
Grisenthwaite Richard Roy, Chief Architect at ARM HOLDINGS PLC /UK, has disclosed 15 transactions in ARM since May 19, 2026: 0 purchases (0 open-market buys) and 2 sales, worth about $9.5M at the reported prices. The latest was filed May 19, 2026, 4 days after the trade.
Open-market buys
0
Sales
2
Avg. disclosure lag
3.8d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Grisenthwaite Richard Roy made no purchases and 2 sales worth $9.5M, plus 13 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Grisenthwaite Richard Roy has traded 1 stock on record; the largest by dollars is ARM.
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| M | Option exercise or conversion | 8 | 45,248 | — |
| A | Grant or award | 5 | 64,123 | — |
| F | Shares withheld for tax | 1 | 21,301 | $4.5M |
| S | Open-market sale | 1 | 24,339 | $5.1M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 15 | 0 | 2 · $9.5M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 4,352 | — | — | derivative | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,631 | — | — | derivative | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 14,595 | — | — | derivative | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 2,046 | — | — | derivative | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 34,785 | — | — | derivative | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 6,648 | — | — | derivative | Form 4 ↗ | |
| ARM | Sell S | May 18, 2026 | May 19, 2026 | 1d | 24,339 | $209 | $5.1M | Form 4 ↗ | ||
| ARM | Sell F | May 15, 2026 | May 19, 2026 | 4d | 21,301 | $209 | $4.5M | Form 4 ↗ | ||
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 4,352 | — | — | Form 4 ↗ | ||
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 13,315 | — | — | Form 4 ↗ | ||
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,631 | — | — | Form 4 ↗ | ||
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 4,158 | — | — | Form 4 ↗ | ||
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 14,595 | — | — | Form 4 ↗ | ||
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 2,046 | — | — | Form 4 ↗ | ||
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 5,217 | — | — | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| May 19, 2026 | Form 4 | 0001973239-26-000076 | 15 | published | EDGAR ↗ |
Other insiders at ARM HOLDINGS PLC /UK
- Abbey William Chief Commercial Officer 22 rows
- Collins Spencer Chief Legal Officer 18 rows
- Child Jason Director 17 rows
- Haas Rene A. Chief Executive Officer 17 rows
- Bartels Laura Kathleen Chief Accounting Officer 15 rows
- DYKSTRA KAREN E Director 9 rows
- Eaton Charlotte Claire Chief People Officer 9 rows
- SOHN YOUNG Director 7 rows
- Sine Jeffrey Director 4 rows
- JACOBS PAUL E Director 3 rows
Everyone on file, with contracts and lobbying under the company's name: ARM HOLDINGS PLC /UK.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 1 | 15 | May 19, 2026 | May 19, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.