ARM insider buying and SEC filings, explained
Arm Holdings plc · CIK 1973239
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$43.4M
Planned sales (10b5-1)
$28.8M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 21, 2026 | Planned (10b5-1) | Jason Child (CFO) sold 10,400 shares at $300.00 ($3.1M), marked as a 10b5-1 plan trade. Holdings down 6% to 153,442 shares. | SEC filing Filed Sep 23, 2026 |
| Aug 27, 2026 | Planned (10b5-1) | Jason Child (CFO) sold 10,400 shares at $255.33 ($2.7M), marked as a 10b5-1 plan trade. Holdings down 6% to 163,832 shares. | SEC filing Filed Aug 31, 2026 |
| Jun 2, 2026 | Sale | Laura Kathleen Bartels (Chief Accounting Officer) sold 11,306 shares at about $392.70 ($4.4M). Holdings down 48% to 12,135 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 4, 2026 |
| Jun 1, 2026 | Sale | William Abbey (Chief Commercial Officer) sold 6,566 shares at about $402.72 ($2.6M). Holdings down 24% to 20,563 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| May 28, 2026 | Sale | William Abbey (Chief Commercial Officer) sold 4,200 shares at about $343.81 ($1.4M). Holdings down 13% to 27,129 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 1, 2026 |
| May 22, 2026 | Sale | William Abbey (Chief Commercial Officer) sold 2,300 shares at about $305.82 ($703K). Holdings down 7% to 31,329 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 26, 2026 |
| May 21, 2026 | Sale | William Abbey (Chief Commercial Officer) sold 4,655 shares at about $287.03 ($1.3M). Holdings down 12% to 33,629 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 22, 2026 |
| May 21, 2026 | Sale | Charlotte Claire Eaton (Chief People Officer) sold 7,805 shares at about $290.01 ($2.3M). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 22, 2026 |
| May 20–21, 2026 | Sale | Charlotte Claire Eaton (Chief People Officer) sold 7,100 shares between May 20 and May 21 at about $269.44 ($1.9M). Holdings down 48% to 7,805 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 21, 2026 |
| May 20, 2026 | Planned (10b5-1) | Jason Child (CFO) sold 31,920 shares at $226.54 ($7.2M), marked as a 10b5-1 plan trade. Holdings down 15% to 174,232 shares. | SEC filing Filed May 21, 2026 |
| May 19, 2026 | Sale | Spencer Collins (Chief Legal Officer) sold 40,941 shares at $215.00 ($8.8M). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 21, 2026 |
| May 19–20, 2026 | Sale | William Abbey (Chief Commercial Officer) sold 15,956 shares between May 19 and May 20 at about $234.64 ($3.7M). Holdings down 29% to 38,284 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 21, 2026 |
| May 18, 2026 | Sale | Richard Roy Grisenthwaite (Chief Architect) sold 24,339 shares at about $209.15 ($5.1M). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 19, 2026 |
| Apr 23–May 15, 2026 | Planned (10b5-1) | William Abbey (Chief Commercial Officer) sold 10,154 shares between Apr 23 and May 15 at about $211.91 ($2.2M), marked as a 10b5-1 plan trade. Holdings down 15% to 57,394 shares. | SEC filing Filed May 19, 2026 |
| May 11, 2026 | Sale | Spencer Collins (Chief Legal Officer) sold 51,961 shares at about $211.73 ($11.0M). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 13, 2026 |
| Apr 22, 2026 | Planned (10b5-1) | Jason Child (CFO) sold 21,280 shares at $180.00 ($3.8M), marked as a 10b5-1 plan trade. Holdings down 12% to 153,426 shares. | SEC filing Filed Apr 23, 2026 |
| Apr 14, 2026 | Planned (10b5-1) | Rene A. Haas (CEO and Director) sold 9,299 shares at about $160.85 ($1.5M), marked as a 10b5-1 plan trade. Holdings down 3% to 273,680 shares. | SEC filing Filed Apr 16, 2026 |
| Mar 25–26, 2026 | Planned (10b5-1) | Rene A. Haas (CEO and Director) sold 31,853 shares between Mar 25 and Mar 26 at about $161.09 ($5.1M), marked as a 10b5-1 plan trade. Holdings down 10% to 282,979 shares. | SEC filing Filed Mar 27, 2026 |
| Mar 25, 2026 | Planned (10b5-1) | Jason Child (CFO) sold 21,280 shares at $148.37 ($3.2M), marked as a 10b5-1 plan trade. Holdings down 11% to 174,706 shares. | SEC filing Filed Mar 27, 2026 |
17 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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