Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
726 institutional managers reported holding ARM for the quarter ended Mar 31, 2026. Together they hold about 8% of shares outstanding; the top 10 hold 3%. 180 opened new positions; 97 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 9.38M | 0.88% | $1.42B | added +339.9% | 2023 Q3 |
| Morgan Stanley | 4.46M | 0.42% | $675.2M | added +18% | 2023 Q3 |
| Capital Research Global Investors | 4.22M | 0.40% | $638.1M | added +133.7% | 2025 Q3 |
| Schroder Investment Management Group | 3.82M | 0.36% | $578.5M | added +102.2% | 2023 Q4 |
| Invesco | 2.95M | 0.28% | $446.6M | added +21.6% | 2023 Q3 |
| FMR (Fidelity) | 2.45M | 0.23% | $370.4M | added +41.5% | 2023 Q3 |
| VAN ECK Associates CORP | 2.21M | 0.21% | $334.7M | added +4292.3% | 2024 Q3 |
| Sustainable Growth Advisers, LP | 2.01M | 0.19% | $303.6M | trimmed -24.8% | 2025 Q1 |
| Alphabet INC. (focused) | 1.96M | 0.18% | $296.6M | unchanged | 2023 Q3 |
| UBS | 1.85M | 0.17% | $279.6M | trimmed -2.4% | 2023 Q3 |
| Altimeter Capital (focused) | 1.72M | 0.16% | $259.5M | opened | 2025 Q1 |
| Wellington Management | 1.66M | 0.15% | $250.4M | trimmed -23% | 2023 Q4 |
| Goldman Sachs | 1.63M | 0.15% | $246.5M | trimmed -57.9% | 2023 Q3 |
| Hyperion Asset Management LTD (focused) | 1.60M | 0.15% | $241.8M | trimmed -12.9% | 2025 Q3 |
| Robeco Institutional Asset Management B.v. | 1.58M | 0.15% | $238.6M | added +27.9% | 2023 Q3 |
| Franklin Resources | 1.55M | 0.14% | $234.6M | added +6.1% | 2023 Q3 |
| Employees Provident Fund Board | 1.40M | 0.13% | $211.8M | added +27.3% | 2024 Q2 |
| Mubadala Investment CO Pjsc | 1.38M | 0.13% | $208.3M | unchanged | 2023 Q4 |
| BlackRock | 1.24M | 0.12% | $188.0M | trimmed -5% | 2023 Q3 |
| Capital International Investors | 1.17M | 0.11% | $176.3M | opened | 2026 Q1 |
| SG Americas Securities, LLC | 971.1k | 0.09% | $146.9M | added +265.6% | 2023 Q3 |
| Susquehanna International Group | 945.4k | 0.09% | $143.0M | trimmed -49.7% | 2023 Q3 |
| Arrowstreet Capital | 945.2k | 0.09% | $143.0M | added +1203.5% | 2025 Q4 |
| Lansdowne Partners (UK) LLP (focused) | 935.5k | 0.09% | $141.5M | added +98.2% | 2025 Q3 |
| Balyasny Asset Management | 924.7k | 0.09% | $139.9M | added +1856.1% | 2023 Q3 |
| Loomis Sayles & CO L P | 860.3k | 0.08% | $130.1M | added +3.7% | 2023 Q3 |
| Janus Henderson | 767.5k | 0.07% | $116.1M | opened | 2026 Q1 |
| Citigroup INC | 753.1k | 0.07% | $113.9M | added +6.4% | 2023 Q3 |
| First Trust Advisors LP | 740.4k | 0.07% | $112.0M | trimmed -22.1% | 2023 Q4 |
| Bank OF America CORP /DE/ | 706.3k | 0.07% | $106.8M | trimmed -69.9% | 2023 Q3 |
| Analog Century Management LP (focused) | 691.4k | 0.07% | $104.6M | opened | 2026 Q1 |
| Artisan Partners | 669.1k | 0.06% | $101.2M | trimmed -46.2% | 2024 Q2 |
| Barclays PLC | 643.7k | 0.06% | $97.4M | trimmed -33.5% | 2023 Q4 |
| Baillie Gifford | 611.9k | 0.06% | $92.6M | unchanged | 2025 Q3 |
| BNP Paribas Financial Markets | 607.5k | 0.06% | $91.9M | trimmed -13.1% | 2024 Q1 |
| Bridgewater Associates | 593.4k | 0.06% | $89.8M | added +81.8% | 2025 Q2 |
| Two Sigma | 580.0k | 0.05% | $87.7M | trimmed -53.9% | 2025 Q3 |
| Ameriprise Financial INC | 521.3k | 0.05% | $78.9M | added +19.3% | 2023 Q3 |
| Mirae Asset Global Etfs Holdings LTD. | 497.8k | 0.05% | $75.3M | trimmed -20.1% | 2023 Q3 |
| Rathbones Group PLC | 497.5k | 0.05% | $75.3M | trimmed -0.5% | 2023 Q3 |
| T. Rowe Price | 493.9k | 0.05% | $74.7M | added +3.5% | 2023 Q3 |
| Altshuler Shaham LTD | 478.3k | 0.04% | $72.3M | added +212.4% | 2025 Q1 |
| NZS Capital, LLC | 467.3k | 0.04% | $70.7M | added +13.5% | 2024 Q2 |
| SEI Investments CO | 454.2k | 0.04% | $68.7M | added +67.5% | 2023 Q3 |
| Whale Rock Capital (focused) | 452.4k | 0.04% | $68.4M | opened | 2026 Q1 |
| Swedbank Robur | 421.0k | 0.04% | $63.7M | added +15.7% | 2025 Q2 |
| Gilder Gagnon Howe & CO LLC | 408.3k | 0.04% | $61.8M | added +11.3% | 2023 Q3 |
| Defiance ETFs, LLC | 387.6k | 0.04% | $58.6M | added +9.4% | 2025 Q4 |
| Penserra Capital Management LLC | 383.3k | 0.04% | $58.0M | added +8.2% | 2024 Q1 |
| Rafferty Asset Management, LLC | 382.1k | 0.04% | $57.8M | trimmed -21.2% | 2024 Q2 |
Largest 50 of 726 shown; the full ranked, searchable register is at boothcheck.com/holders/ARM. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.