ARM at a glance
Arm Holdings (ARM, SEC CIK 1973239) filed Form 4 insider filings as recently as September 23, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- As of June 30, 2026, 30 institutional investment managers tracked by SignalX reported holding Arm Holdings (ARM) shares worth $12.4 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Child Jason on September 21, 2026 of 10,400 shares at $300.00 per share.
- In the last 90 days, ARM insiders reported 0 open-market purchases ($0) and 2 open-market sales ($5.8M) on Form 4, a net sale of $5.8M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Insiders · 90 days
- 0 buys · 2 sells
- Net −$5.8M
- 13F holders
- 30 funds
- $12.4B · −1 vs prior quarter
SignalX for ARM
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Child Jason | Sell | Sep 21, 2026 | 10,400 | $300.00 |
| Abbey William | A | Sep 14, 2026 | 17,288 | - |
| Haas Rene A. | A | Sep 9, 2026 | 425,000 | - |
| Haas Rene A. | A | Aug 31, 2026 | 64 | $108.33 |
| Child Jason | Sell | Aug 27, 2026 | 10,400 | $255.33 |
| Bartels Laura Kathleen | M | Aug 17, 2026 | 819 | - |
| Bartels Laura Kathleen | M | Aug 17, 2026 | 819 | - |
| Bartels Laura Kathleen | F | Aug 17, 2026 | 856 | $271.43 |
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate ARM share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 30 | $12.37B |
| Q1 2026 | 31 | $3.77B |
| Q4 2025 | 29 | $4.59B |
| Q3 2025 | 30 | $5.50B |
| Q2 2025 | 31 | $6.14B |
| Q1 2025 | 27 | $3.19B |
| Q4 2024 | 23 | $2.50B |
| Q3 2024 | 22 | $3.12B |
- Invesco Ltd+6.93M (+118%)
- FMR LLC (Fidelity)+1.61M (+66%)
- Goldman Sachs Group+1.29M (+79%)
- JPMorgan Chase & Co+1.01M (+563%)
- BlackRock+793.3K (+64%)
- Morgan Stanley−2.31M (-52%)
- Bridgewater Associates LP−588.4K (-99%)
- D.E. Shaw & Co−300.9K (-98%)
- Millennium Management−267.2K (-99%)
- Ameriprise Financial−165.8K (-32%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 223 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
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ARM SEC filings: frequently asked questions
Are ARM insiders buying or selling?
In the last 90 days, Arm Holdings (ARM) officers, directors and 10% owners reported no open-market purchases and 2 open-market sales worth $5.8 million by 1 insider on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold ARM stock?
As of June 30, 2026, the largest Arm Holdings (ARM) holders among the 13F filers tracked by SignalX were Invesco Ltd ($4.5 billion), FMR LLC (Fidelity) ($1.4 billion), Goldman Sachs Group ($1.0 billion), Morgan Stanley ($765.3 million), BlackRock ($721.9 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What are the latest ARM SEC filings?
Arm Holdings (ARM) filed a Form 4 insider filing on September 23, 2026.
What is ARM's SEC CIK number?
Arm Holdings (ARM)'s SEC Central Index Key (CIK) is 1973239. EDGAR lists every ARM filing under that number.
Ask anything about ARM
The research agent reads ARM's filings, financials, insider trades and 13F holders, then answers with sources.