ARX · Accelerant Holdings · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding ARX
All superinvestors →Holder Concentration
Across 117 13F filersWho Holds ARX
Last 5 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 116 filers, like-for-like change +16.0%; actively managed books +2.7%; index-like books +263.5%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 45.9% | 51 | +2.5% |
| Exempt adviser | 2.1% | 2 | -58.8% |
| Adviser | 7.2% | 2 | -24.0% |
| Bank | 7.6% | 13 | +60.6% |
| Insurer | 0.0% | 1 | new |
| Broker-dealer | 0.0% | 0 | — |
| Benefit plan | 0.2% | 2 | +34.0% |
| Non-US | 0.7% | 6 | +26.3% |
| Holding company | 17.8% | 6 | +373.9% |
| Unknown | 18.4% | 33 | +4.6% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 16.0% | 21 | +263.5% |
| Systematic-like | 5.1% | 13 | -8.0% |
| Concentrated | 25.3% | 11 | -1.9% |
| Diversified active | 53.6% | 71 | +6.2% |
| Unknown | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 58.4% | 51 | +35.1% |
| Medium turnover | 19.2% | 28 | -7.3% |
| High turnover | 15.7% | 29 | +0.9% |
| Unknown | 6.7% | 8 | +0.3% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 8.5% | 18 | +5.3% |
| Medium horizon | 16.8% | 17 | +42.5% |
| Long horizon | 64.7% | 66 | +15.5% |
| Unknown | 10.0% | 15 | -2.9% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 18.8% | 13 | +10.8% |
| $1B to $10B | 18.3% | 27 | +1.9% |
| $10B to $100B | 6.4% | 27 | -27.7% |
| $100B or more | 56.5% | 49 | +33.2% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 8.7% | 7 | 0.0% |
| Pooled investment vehicles | 20.3% | 24 | +29.3% |
| Registered funds and BDCs | 8.0% | 7 | -2.9% |
| Insurance companies | 4.9% | 4 | +1.7% |
| Governments and sovereign funds | 0.7% | 2 | +221.1% |
| Other investment advisers | 0.0% | 1 | +131.9% |
| Other | 0.3% | 1 | +9.6% |
| Diversified | 3.0% | 5 | -56.0% |
| Corporations | 0.0% | 0 | — |
| Unknown | 54.1% | 65 | +30.7% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 23.9% | 29 | +2.9% |
| Private equity funds | 0.2% | 2 | +48.4% |
| Venture capital funds | 0.0% | 1 | new |
| Real estate funds | 2.9% | 2 | 0.0% |
| Securitized asset funds | 4.9% | 1 | -2.6% |
| Other private funds | 0.2% | 3 | new |
| Mixed private funds | 2.2% | 1 | -51.8% |
| No private funds | 13.8% | 14 | -1.6% |
| Private funds, type not stated | 0.0% | 0 | -100.0% |
| Unknown | 52.0% | 63 | +43.2% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 95.7% | 91 | +21.0% |
| Outside the US | 4.3% | 25 | -39.3% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
116 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $2,808,677 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 93.3% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ARX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | RDDT Reddit, Inc. | 3 |
| 2 | NU Nu Holdings Ltd. | 3 |
| 3 | MELI Mercadolibre Inc | 3 |
| 4 | AMZN Amazon Com Inc | 5 |
| 5 | GOOGL Alphabet Inc. | 5 |
| 6 | LRCX Lam Research Corp | 3 |
| 7 | META Meta Platforms, Inc. | 4 |
| 8 | INTC Intel Corp | 3 |
| 9 | AMAT Applied Materials Inc | 3 |
| 10 | TSM Taiwan Semiconductor Manufacturing Co Ltd | 3 |
Shareholder Targets
13F filers that own its peers but not ARX, quarter ended Jun 30, 2026Found through its holder-overlap peers: RDDT, NU, MELI, AMZN, GOOGL, LRCX, META, INTC, AMAT, TSM, NVDA, MSFT, MU, AMD, V, AVGO, AAPL. 7,200 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $353,462,968,007 17 held | NVDA, GOOGL, AAPL |
| 2 | Capital Research Global Investors Adviser, Diversified active | $271,986,415,276 16 held | AVGO, NVDA, GOOGL |
| 3 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser, Index-like | $205,755,590,397 17 held | NVDA, AAPL, GOOGL |
| 4 | Capital International Investors Adviser, Diversified active | $161,205,675,137 14 held | AVGO, GOOGL, MSFT |
| 5 | Amundi Holding company, Index-like | $144,317,538,494 17 held | NVDA, AAPL, GOOGL |
| 6 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $140,126,807,174 17 held | NVDA, GOOGL, AVGO |
| 7 | FRANKLIN RESOURCES INC Adviser, Diversified active | $126,526,663,543 17 held | AAPL, NVDA, MSFT |
| 8 | AMERIPRISE FINANCIAL INC Adviser, Diversified active | $107,996,006,400 17 held | NVDA, GOOGL, AAPL |
| 9 | Berkshire Hathaway Inc Insurer, Concentrated | $103,714,385,303 2 held | AAPL, GOOGL |
| 10 | DEUTSCHE BANK AG\ Non-US, Diversified active | $103,273,921,361 16 held | NVDA, GOOGL, AAPL |
Fund Ownership of ARX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 1.65% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.04% | 88,693 |
| Index ETFs | 1.61% | 3,504,438 |
| Active ETFs | 0.00% | 0 |
| Active funds | 1.68% | 3,642,493 |
| Unclassified | 0.00% | 5,703 |
| All registered funds | 3.33% | 7,241,327 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Small Deer Park Road Corp Holding company | $90,644,848 | 10.39% | 4,594,265 | Shares | 2026-10-23 | |
| Small SECURITY BENEFIT LIFE INSURANCE CO /KS/ | $68,752,532 | 7.88% | 5,866,257 | Shares | 2026-07-23 | |
| Mega FMR LLC Holding company | $65,968,117 | 7.56% | 5,628,679 | Shares | 2026-08-13 | |
| Mid BARINGS LLC Registered adviser | $61,732,545 | 7.08% | 3,128,867 | Shares | 2026-10-22 | |
| Mega Capital World Investors Adviser | $54,224,502 | 6.21% | 4,626,664 | Shares | 2026-08-12 | |
| Small Keenan Capital, LLC Registered adviser | $46,797,057 | 5.36% | 3,992,923 | Shares | 2026-08-14 | |
| Mega AMERICAN CENTURY COMPANIES INC | $45,445,694 | 5.21% | 3,877,619 | Shares | 2026-08-12 | |
| Mid GILDER GAGNON HOWE & CO LLC Registered adviser | $43,739,321 | 5.01% | 3,732,024 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $40,976,315 | 4.70% | 3,496,273 | Shares | 2026-08-07 | |
| Mid Azora Capital LP Registered adviser | $35,744,195 | 4.10% | 3,049,846 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $28,342,827 | 3.25% | 2,418,330 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $25,512,176 | 2.92% | 2,176,807 | Shares | 2026-08-12 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $23,599,180 | 2.70% | 2,013,582 | Shares | 2026-08-14 | |
| Large Cresset Asset Management, LLC Registered adviser | $21,560,346 | 2.47% | 1,839,620 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $20,486,384 | 2.35% | 1,747,985 | Shares | 2026-09-02 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $19,422,348 | 2.23% | 1,657,197 | Shares | 2026-08-13 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $16,960,633 | 1.94% | 1,447,153 | Shares | 2026-08-14 | |
| Small Owls Nest Partners IA, LLC Registered adviser | $14,672,080 | 1.68% | 1,251,884 | Shares | 2026-08-13 | |
| Mega MARSHALL WACE, LLP Exempt adviser | $13,005,390 | 1.49% | 1,109,675 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $11,158,212 | 1.28% | 952,066 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $10,557,083 | 1.21% | 900,775 | Shares | 2026-09-22 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $9,488,746 | 1.09% | 809,620 | Shares | 2026-08-12 | |
| Small G2 Investment Partners Management LLC Registered adviser | $7,500,800 | 0.86% | 640,000 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $7,077,215 | 0.81% | 603,858 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $6,498,130 | 0.74% | 554,448 | Shares | 2026-08-13 | |
| Large Walleye Capital LLC Registered adviser | $6,343,532 | 0.73% | 541,257 | Shares | 2026-08-03 | |
| Mid Lighthouse Investment Partners, LLC Registered adviser | $5,721,141 | 0.66% | 488,152 | Shares | 2026-08-14 | |
| Mid ArrowMark Colorado Holdings LLC Registered adviser | $5,592,877 | 0.64% | 477,208 | Shares | 2026-08-13 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $4,792,671 | 0.55% | 408,931 | Shares | 2026-08-06 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $4,369,368 | 0.50% | 372,813 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $4,332,003 | 0.50% | 369,625 | Shares | 2026-08-13 | |
| Mid XTX Topco Ltd | $3,778,727 | 0.43% | 322,417 | Shares | 2026-08-14 | |
| Large Holocene Advisors, LP Registered adviser | $3,516,000 | 0.40% | 300,000 | Shares | 2026-08-14 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $3,470,292 | 0.40% | 296,100 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $3,281,258 | 0.38% | 279,971 | Shares | 2026-08-13 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $2,804,795 | 0.32% | 239,317 | Shares | 2026-08-14 | |
| Small CANNELL CAPITAL LLC Registered adviser | $2,005,057 | 0.23% | 171,080 | Shares | 2026-08-18 | |
| Mega Bank of New York Mellon Corp Bank | $2,000,354 | 0.23% | 170,679 | Shares | 2026-08-06 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $1,744,885 | 0.20% | 148,881 | Shares | 2026-08-14 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $1,620,817 | 0.19% | 138,295 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $1,579,586 | 0.18% | 134,777 | Shares | 2026-08-11 | |
| Mega Swiss National Bank | $1,372,412 | 0.16% | 117,100 | Shares | 2026-08-11 | |
| Mid Burkehill Global Management, LP Registered adviser | $1,172,000 | 0.13% | 100,000 | Shares | 2026-08-14 | |
| Mid GSA CAPITAL PARTNERS LLP Registered adviser | $1,159,236 | 0.13% | 98,911 | Shares | 2026-08-06 | |
| Mid Engineers Gate Manager LP | $1,152,708 | 0.13% | 98,354 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $1,082,974 | 0.12% | 92,404 | Shares | 2026-08-13 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $1,007,216 | 0.12% | 85,940 | Shares | 2026-08-14 | |
| Mid Militia Capital Management LLC Registered adviser | $937,600 | 0.11% | 80,000 | Shares | 2026-08-12 | |
| Large TIGER GLOBAL MANAGEMENT LLC Registered adviser | $879,000 | 0.10% | 75,000 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $819,028 | 0.09% | 69,883 | Shares | 2026-08-12 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $808,902 | 0.09% | 69,019 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $769,898 | 0.09% | 65,691 | Shares | 2026-08-24 | |
| Mega SEI INVESTMENTS CO Holding company | $763,452 | 0.09% | 65,141 | Shares | 2026-08-14 | |
| Large Woodline Partners LP Registered adviser | $674,532 | 0.08% | 57,554 | Shares | 2026-08-14 | |
| Mid SummitTX Capital, L.P. Registered adviser | $663,164 | 0.08% | 56,584 | Shares | 2026-08-14 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $619,319 | 0.07% | 52,843 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $595,997 | 0.07% | 50,853 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $583,656 | 0.07% | 49,800 | Call | 2026-09-02 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $486,040 | 0.06% | 41,471 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $473,816 | 0.05% | 40,428 | Shares | 2026-08-14 | |
| Small Jackson Creek Investment Advisors LLC Registered adviser | $470,686 | 0.05% | 40,161 | Shares | 2026-08-10 | |
| Mega Legal & General Group Plc | $443,320 | 0.05% | 37,826 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC Registered adviser | $425,506 | 0.05% | 36,306 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $395,372 | 0.05% | 33,735 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $393,569 | 0.05% | 33,581 | Shares | 2026-08-03 | |
| Small FORMULA GROWTH LTD Registered adviser | $363,320 | 0.04% | 31,000 | Shares | 2026-08-17 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Non-US | $335,121 | 0.04% | 28,594 | Shares | 2026-09-09 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $328,429 | 0.04% | 28,023 | Shares | 2026-08-14 | |
| Mega JONES FINANCIAL COMPANIES LLLP | $296,855 | 0.03% | 25,329 | Shares | 2026-08-14 | |
| Large NATIXIS ADVISORS, LLC Registered adviser | $296,668 | 0.03% | 25,313 | Shares | 2026-08-14 | |
| Mid Diversified Trust Co | $282,287 | 0.03% | 24,086 | Shares | 2026-07-17 | |
| Mega Jupiter Topco LLC | $275,420 | 0.03% | 23,500 | Shares | 2026-08-14 | |
| Small Yorktown Management & Research Co Inc Registered adviser | $267,216 | 0.03% | 22,800 | Shares | 2026-07-23 | |
| Mid WINTON GROUP Ltd | $257,840 | 0.03% | 22,000 | Shares | 2026-08-07 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $250,808 | 0.03% | 21,400 | Shares | 2026-07-29 | |
| Mega BARCLAYS PLC Bank | $241,794 | 0.03% | 20,631 | Shares | 2026-08-14 | |
| Mid Graham Capital Management, L.P. Registered adviser | $234,411 | 0.03% | 20,001 | Shares | 2026-08-14 | |
| Large Police & Firemen's Retirement System of New Jersey | $211,253 | 0.02% | 18,025 | Shares | 2026-07-23 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $204,994 | 0.02% | 17,491 | Shares | 2026-08-14 | |
| Large Quadrature Capital Ltd | $191,516 | 0.02% | 16,341 | Shares | 2026-08-07 | |
| Large ARIZONA STATE RETIREMENT SYSTEM | $188,785 | 0.02% | 16,108 | Shares | 2026-08-07 | |
| Large PEAK6 LLC Broker-dealer | $178,144 | 0.02% | 15,200 | Call | 2026-08-13 | |
| Large Zurcher Kantonalbank (Zurich Cantonalbank) Non-US | $155,876 | 0.02% | 13,300 | Shares | 2026-08-12 | |
| Large KLP KAPITALFORVALTNING AS | $154,704 | 0.02% | 13,200 | Shares | 2026-08-12 | |
| Mid Entropy Technologies, LP Registered adviser | $151,820 | 0.02% | 12,954 | Shares | 2026-08-13 | |
| Mid Virtu Financial LLC | $149,148 | 0.02% | 12,726 | Shares | 2026-08-13 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. Non-US | $148,057 | 0.02% | 12,633 | Shares | 2026-08-13 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $144,120 | 0.02% | 12,297 | Shares | 2026-08-12 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC Registered adviser | $143,511 | 0.02% | 12,245 | Shares | 2026-08-13 | |
| Mega SG Americas Securities, LLC Non-US | $141,624 | 0.02% | 12,084 | Shares | 2026-08-07 | |
| Mid Magnetar Financial LLC Registered adviser | $139,889 | 0.02% | 11,936 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $135,952 | 0.02% | 11,600 | Shares | 2026-08-14 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $134,920 | 0.02% | 11,512 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $134,780 | 0.02% | 11,500 | Put | 2026-08-14 | |
| Large INTECH INVESTMENT MANAGEMENT LLC Registered adviser | $133,490 | 0.02% | 11,390 | Shares | 2026-08-10 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $129,845 | 0.01% | 11,079 | Shares | 2026-08-14 | |
| Small State of Wyoming | $128,251 | 0.01% | 10,943 | Shares | 2026-08-06 | |
| Large Vanguard Investments Australia, Ltd. | $125,134 | 0.01% | 10,677 | Shares | 2026-08-13 | |
| Mega ROYAL BANK OF CANADA Bank | $119,707 | 0.01% | 10,214 | Shares | 2026-08-14 | |
| Mega Pictet Asset Management Holding SA | $119,110 | 0.01% | 10,163 | Shares | 2026-07-30 |
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