Who owns ARM (ARM)
Which tracked institutional funds hold ARM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ARM company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ARM is one-sided between 2025-Q4 and 2026-Q1: 332 added or opened and 97 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ARM’s largest tracked holder by dollar value, DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main, sizes it at 1.3% of its own reported 13F book, while the median holder sizes it at 0.2% of theirs — a 1.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ARM divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 743 tracked filers holding ARM, 415 increased or opened the position and 309 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ARM between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 75
- Altimeter Capital Management, LP$260M
- Capital International Investors$176M
- JANUS HENDERSON GROUP PLC$116M
- Analog Century Management LP$105M
- Whale Rock Capital Management LLC$68M
- Schonfeld Strategic Advisors LLC$52M
Full exits 43
- Capital World Investors$127M
- MARSHALL WACE, LLP$123M
- TWO SIGMA ADVISERS, LP$78M
- CAPITAL FUND MANAGEMENT S.A.$50M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$38M
- FRANKLIN STREET ADVISORS INC /NC$14M
Largest adds
- DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main$1.2B
- Capital Research Global Investors$441M
- SCHRODER INVESTMENT MANAGEMENT GROUP$372M
- VAN ECK ASSOCIATES CORP$329M
- MORGAN STANLEY$262M
- Invesco Ltd.$178M
Largest trims
- GOLDMAN SACHS GROUP INC$177M
- BANK OF AMERICA CORP /DE/$150M
- Walleye Trading LLC$140M
- Nuveen, LLC$103M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$87M
- JPMORGAN CHASE & CO$83M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 9,376,278 | $1.4B | 10.8% | 2026-Q1 |
| MORGAN STANLEY added | 4,463,815 | $675M | 5.1% | 2026-Q1 |
| Capital Research Global Investors added | 4,218,729 | $638M | 4.8% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 3,824,345 | $579M | 4.4% | 2026-Q1 |
| Invesco Ltd. added | 2,930,894 | $443M | 3.4% | 2026-Q1 |
| FMR LLC added | 2,420,630 | $366M | 2.8% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 2,212,884 | $335M | 2.5% | 2026-Q1 |
| Sustainable Growth Advisers, LP trimmed | 2,007,159 | $304M | 2.3% | 2026-Q1 |
| Alphabet Inc. | 1,960,784 | $297M | 2.3% | 2026-Q1 |
| Altimeter Capital Management, LP added | 1,715,440 | $260M | 2.0% | 2026-Q1 |
| UBS Group AG trimmed | 1,677,045 | $254M | 1.9% | 2026-Q1 |
| COATUE MANAGEMENT LLC | 2,300,000 | $251M | 1.9% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 1,648,221 | $249M | 1.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,629,861 | $247M | 1.9% | 2026-Q1 |
| Hyperion Asset Management Ltd trimmed | 1,598,537 | $242M | 1.8% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 1,551,049 | $235M | 1.8% | 2026-Q1 |
| Employees Provident Fund Board added | 1,400,000 | $212M | 1.6% | 2026-Q1 |
| Mubadala Investment Co PJSC | 1,376,960 | $208M | 1.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 1,242,684 | $188M | 1.4% | 2026-Q1 |
| Capital International Investors new | 1,165,530 | $176M | 1.3% | 2026-Q1 |
| Robeco Schweiz AG added | 1,007,404 | $152M | 1.2% | 2026-Q1 |
| SG Americas Securities, LLC added | 971,067 | $147M | 1.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 945,152 | $143M | 1.1% | 2026-Q1 |
| LANSDOWNE PARTNERS (UK) LLP added | 935,503 | $142M | 1.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 924,723 | $140M | 1.1% | 2026-Q1 |
| LOOMIS SAYLES & CO L P added | 860,262 | $130M | 1.0% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 780,619 | $118M | 0.9% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC new | 767,534 | $116M | 0.9% | 2026-Q1 |
| CITIGROUP INC added | 753,058 | $114M | 0.9% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 740,398 | $112M | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 706,252 | $107M | 0.8% | 2026-Q1 |
| Analog Century Management LP new | 691,364 | $105M | 0.8% | 2026-Q1 |
| Artisan Partners Limited Partnership trimmed | 669,054 | $101M | 0.8% | 2026-Q1 |
| BARCLAYS PLC trimmed | 643,726 | $97M | 0.7% | 2026-Q1 |
| BAILLIE GIFFORD & CO trimmed | 611,897 | $93M | 0.7% | 2026-Q1 |
| Bridgewater Associates, LP added | 593,361 | $90M | 0.7% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 580,038 | $88M | 0.7% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. trimmed | 570,263 | $86M | 0.7% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 521,298 | $79M | 0.6% | 2026-Q1 |
| Rathbones Group PLC trimmed | 497,528 | $75M | 0.6% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 493,865 | $75M | 0.6% | 2026-Q1 |
| Altshuler Shaham Ltd added | 478,289 | $72M | 0.5% | 2026-Q1 |
| NZS Capital, LLC added | 467,303 | $71M | 0.5% | 2026-Q1 |
| SEI INVESTMENTS CO added | 454,220 | $69M | 0.5% | 2026-Q1 |
| Whale Rock Capital Management LLC new | 452,384 | $68M | 0.5% | 2026-Q1 |
| Swedbank AB added | 421,000 | $64M | 0.5% | 2026-Q1 |
| GILDER GAGNON HOWE & CO LLC added | 408,257 | $62M | 0.5% | 2026-Q1 |
| Defiance ETFs, LLC added | 387,564 | $59M | 0.4% | 2026-Q1 |
| Penserra Capital Management LLC added | 383,257 | $58M | 0.4% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 382,080 | $58M | 0.4% | 2026-Q1 |
| Mirae Asset Global Investments Co., Ltd. trimmed | 381,242 | $58M | 0.4% | 2026-Q1 |
| Tidal Investments LLC added | 371,037 | $56M | 0.4% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 366,000 | $55M | 0.4% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 361,706 | $55M | 0.4% | 2026-Q1 |
| MARK ASSET MANAGEMENT LP added | 351,641 | $53M | 0.4% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 345,322 | $52M | 0.4% | 2026-Q1 |
| Pacific Heights Asset Management LLC added | 325,000 | $49M | 0.4% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 315,527 | $48M | 0.4% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 309,512 | $47M | 0.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 306,620 | $46M | 0.4% | 2026-Q1 |
| Nuveen, LLC trimmed | 303,909 | $46M | 0.3% | 2026-Q1 |
| 1832 Asset Management L.P. trimmed | 300,000 | $45M | 0.3% | 2026-Q1 |
| Tensor Edge Capital, LLC new | 289,461 | $44M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 288,820 | $44M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 285,505 | $43M | 0.3% | 2026-Q1 |
| STATE STREET CORP trimmed | 279,616 | $42M | 0.3% | 2026-Q1 |
| TRAN CAPITAL MANAGEMENT, L.P. added | 272,907 | $41M | 0.3% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 270,164 | $41M | 0.3% | 2026-Q1 |
| LPL Financial LLC trimmed | 260,253 | $39M | 0.3% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 257,788 | $39M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 240,520 | $36M | 0.3% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ | 233,880 | $35M | 0.3% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 231,046 | $35M | 0.3% | 2026-Q1 |
| Focus Partners Wealth added | 230,852 | $35M | 0.3% | 2026-Q1 |
| DOCK STREET ASSET MANAGEMENT INC trimmed | 214,885 | $33M | 0.2% | 2026-Q1 |
| NWI MANAGEMENT LP | 206,730 | $31M | 0.2% | 2026-Q1 |
| Clear Street Group Inc. added | 200,879 | $30M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 193,381 | $29M | 0.2% | 2026-Q1 |
| Rheos Capital Works Inc. added | 189,600 | $29M | 0.2% | 2026-Q1 |
| Centiva Capital, LP added | 186,321 | $28M | 0.2% | 2026-Q1 |
| Legal & General Group Plc added | 179,172 | $27M | 0.2% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 177,885 | $27M | 0.2% | 2026-Q1 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC added | 173,336 | $26M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 171,463 | $26M | 0.2% | 2026-Q1 |
| Jericho Capital Asset Management L.P. new | 1,306,115 | $211M | 1.6% | 2025-Q2 stale |
| NVIDIA CORP | 1,101,249 | $156M | 1.2% | 2025-Q3 stale |
| Capital World Investors trimmed | 1,165,776 | $127M | 1.0% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 1,128,252 | $123M | 0.9% | 2025-Q4 stale |
| AXA S.A. added | 629,816 | $102M | 0.8% | 2025-Q2 stale |
| Hudson Bay Capital Management LP trimmed | 600,000 | $97M | 0.7% | 2025-Q2 stale |
| Castle Hook Partners LP new | 525,825 | $85M | 0.6% | 2025-Q2 stale |
| TWO SIGMA ADVISERS, LP added | 712,100 | $78M | 0.6% | 2025-Q4 stale |
| Driehaus Capital Management LLC added | 437,769 | $71M | 0.5% | 2025-Q2 stale |
| Polar Capital Holdings Plc trimmed | 611,759 | $65M | 0.5% | 2025-Q1 stale |
| CAPITAL FUND MANAGEMENT S.A. added | 454,683 | $50M | 0.4% | 2025-Q4 stale |
| GQG Partners LLC trimmed | 273,048 | $44M | 0.3% | 2025-Q2 stale |
| Mawer Investment Management Ltd. trimmed | 269,784 | $38M | 0.3% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 343,576 | $38M | 0.3% | 2025-Q4 stale |
| SIG BROKERAGE, LP added | 183,815 | $30M | 0.2% | 2025-Q2 stale |
| IMC-Chicago, LLC trimmed | 252,432 | $27M | 0.2% | 2025-Q1 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.