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ROCKWOOD RESEARCH · A CORPORATE FILINGS WEBSITE|STRAIGHT FROM THE SOURCE · SEC EDGAR|SPONSOREDYour message on this tape — bid on the Rockwood Ad Exchange · Rockwood Ad Exchange|
Rockwood Research
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ARM

ARM HOLDINGS PLC /UK

Semiconductors & Related Devices · SIC 3674CIK 1973239Held by 10 tracked managersEDGAR filings ↗10-K/10-Q ↗

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10 managers · Q2 2026 13F
Lansdowne Partners (UK)
Lansdowne Partners (UK)Position history →
15.6%
+14.6%
Altimeter Capital Management
Altimeter Capital ManagementPosition history →
5.9%
(4.3%)
Sands Capital Management
Sands Capital ManagementPosition history →
0.85%
NEW
Zevenbergen Capital Investments
Zevenbergen Capital InvestmentsPosition history →
0.49%
+6.8%
Duquesne Family Office
Stanley DruckenmillerPosition history →
0.23%
(73.7%)
Capital World Investors
Capital World InvestorsPosition history →
0.18%
NEW
Capital Research Global Investors
Capital Research Global InvestorsPosition history →
0.12%
(43.1%)
Gladstone Capital Management
Gladstone Capital ManagementPosition history →
0.07%
+110.0%
Maverick Capital
Lee AinsliePosition history →
0.01%
NEW
Bridgewater Associates
Bridgewater AssociatesPosition history →
0.01%
(99.2%)

Weight = position value ÷ the manager's total 13F long-equity value in the same filing — one definition for every row. “1st obs.” marks a position with no earlier stored 13F to compare against — it is not shown as a purchase.