Who owns ARM? 13F holders and whale ownership
ARM is tracked across public portfolios in Whale Analyzer. This page answers who owns ARM, which top funds are buying ARM, aggregate disclosed value, and recent position changes based on public data. Brad Gerstner is the largest reported holder at $260M; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (4 increased, 0 reduced); the stock trades above the aggregate whale cost basis of $68.78. Top tracked holders include Brad Gerstner, Ray Dalio, Whale Rock Capital, and Stanley Druckenmiller.
Continue to the live ARM dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Brad Gerstner 13F portfolio Altimeter Capital holdings | $259.5M | 1.7M | New |
| Ray Dalio 13F portfolio Bridgewater Associates holdings | $89.8M | 593.4K | Increased |
| Whale Rock Capital 13F portfolio Whale Rock Capital Management holdings | $68.4M | 452.4K | New |
| Stanley Druckenmiller 13F portfolio Duquesne Family Office holdings | $16.1M | 106.7K | New |
Ownership concentration
Reported ownership of ARM is highly concentrated across tracked institutions.
- Single largest holder: 59.8% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 4 tracked institutions, 4 increased. Net positioning is net buying.
- Brad Gerstner — Altimeter Capital ($259.5M) · avg cost $62.79
- Ray Dalio — Bridgewater Associates ($89.8M) (▲ 81.8% qoq shares) · avg cost $58.21
- Whale Rock Capital — Whale Rock Capital Management ($68.4M) · avg cost $105.36
Whale cost basis vs current price
The aggregate tracked cost basis is $68.78 versus a current price of $334.27, so ARM trades above its cost basis (+386.0%). Average unrealized P&L across tracked holders: 264%.
Sector positioning — Information Technology
ARM sits within the Information Technology sector alongside 131 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live ARM dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on ARM with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns ARM stock?
Whale Analyzer tracks 4 public institutional holders of ARM with a combined reported value of $433.9M. See the holder table above for the largest tracked positions.
Which top funds are buying ARM?
Tracked institutions were net buying last quarter — 4 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is ARM ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is ARM above or below the whale cost basis?
The aggregate tracked cost basis is $68.78 versus a current price of $334.27 (+386.0%).
What does 13F ownership mean for ARM?
Use the interactive ARM dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.