Transactions
22
Insider / ARM HOLDINGS PLC /UK
Abbey William
Chief Commercial Officer at ARM HOLDINGS PLC /UK
- Company
- ARM HOLDINGS PLC /UK
- Ticker
- ARM
- First filing on record
- May 19, 2026
- Latest trade on record
- September 14, 2026
- SEC filings
- EDGAR ↗
Abbey William, Chief Commercial Officer at ARM HOLDINGS PLC /UK, has disclosed 22 transactions in ARM since May 19, 2026: 0 purchases (0 open-market buys) and 11 sales, worth about $15.2M at the reported prices. The latest was filed September 16, 2026, 2 days after the trade; 2 filings were late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
11
Avg. disclosure lag
5.3d
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 Abbey William made no purchases and 11 sales worth $15M, plus 11 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.
Abbey William has traded 1 stock on record; the largest by dollars is ARM.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
1 of 7 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
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 |
|---|---|---|---|---|
| S | Open-market sale | 10 | 43,831 | $12.0M |
| M | Option exercise or conversion | 6 | 16,400 | — |
| A | Grant or award | 5 | 46,164 | — |
| F | Shares withheld for tax | 1 | 15,317 | $3.2M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 22 | 0 | 11 · $15.2M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| ARM | Other A | September 14, 2026 | September 16, 2026 | 2d | 17,288 | — | — | derivative | Form 4 ↗ | |
| ARM | Sell S | June 1, 2026 | June 3, 2026 | 2d | 3,922 | $416 | $1.6M | Form 4 ↗ | ||
| ARM | Sell S | June 1, 2026 | June 3, 2026 | 2d | 2,644 | $384 | $1.0M | Form 4 ↗ | ||
| ARM | Sell S | May 28, 2026 | June 1, 2026 | 4d | 4,200 | $344 | $1.4M | Form 4 ↗ | ||
| ARM | Sell S | May 22, 2026 | May 26, 2026 | 4d | 2,300 | $306 | $703K | Form 4 ↗ | ||
| ARM | Sell S | May 21, 2026 | May 22, 2026 | 1d | 4,655 | $287 | $1.3M | Form 4 ↗ | ||
| ARM | Sell S | May 20, 2026 | May 21, 2026 | 1d | 5,069 | $257 | $1.3M | Form 4 ↗ | ||
| ARM | Sell S | May 19, 2026 | May 21, 2026 | 2d | 10,887 | $224 | $2.4M | Form 4 ↗ | ||
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 4,706 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,743 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,751 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 5,566 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| ARM | Sell S | April 23, 2026 | May 19, 2026 | 26d | 1,577 | $199 | $314K | late10b5-1 plan | Form 4 ↗ | |
| ARM | Sell S | April 24, 2026 | May 19, 2026 | 25d | 1,577 | $222 | $350K | late10b5-1 plan | Form 4 ↗ | |
| ARM | Sell S | May 15, 2026 | May 19, 2026 | 4d | 7,000 | $213 | $1.5M | 10b5-1 plan | Form 4 ↗ | |
| ARM | Sell F | May 15, 2026 | May 19, 2026 | 4d | 15,317 | $209 | $3.2M | 10b5-1 plan | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 4,706 | — | — | 10b5-1 plan | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 14,400 | — | — | 10b5-1 plan | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,743 | — | — | 10b5-1 plan | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 4,444 | — | — | 10b5-1 plan | Form 4 ↗ | |
| ARM | Option / conversion M | May 15, 2026 | May 19, 2026 | 4d | 1,751 | — | — | 10b5-1 plan | Form 4 ↗ | |
| ARM | Other A | May 15, 2026 | May 19, 2026 | 4d | 4,466 | — | — | 10b5-1 plan | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 16, 2026 | Form 4 | 0001973239-26-000133 | 1 | published | EDGAR ↗ |
| June 3, 2026 | Form 4 | 0001973239-26-000105 | 2 | published | EDGAR ↗ |
| June 1, 2026 | Form 4 | 0001973239-26-000103 | 1 | published | EDGAR ↗ |
| May 26, 2026 | Form 4 | 0001973239-26-000101 | 1 | published | EDGAR ↗ |
| May 22, 2026 | Form 4 | 0001973239-26-000091 | 1 | published | EDGAR ↗ |
| May 21, 2026 | Form 4 | 0001973239-26-000084 | 2 | published | EDGAR ↗ |
| May 19, 2026 | Form 4 | 0001973239-26-000078 | 14 | published | EDGAR ↗ |
Other insiders at ARM HOLDINGS PLC /UK
- 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
- Grisenthwaite Richard Roy Chief Architect 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.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 7 | 22 | May 19, 2026 | September 16, 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.