ACCELERANT HOLDINGS (ARX)
Institutional ownership reported to the SEC as of Q2 2026, across 5 quarters.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| SECURITY BENEFIT LIFE INSURANCE CO /KS/ | $68.8M | 5,866,257 | 37.88% | 4q | HELD |
| FMR LLC | $66.0M | 5,628,679 | 0.00% | 4q | +210.6%+$44.7M |
| Capital World Investors | $54.2M | 4,626,664 | 0.01% | 4q | -10.2%-$6.2M |
| Keenan Capital, LLC | $46.8M | 3,992,923 | 9.25% | 3q | HELD |
| AMERICAN CENTURY COMPANIES INC | $45.4M | 3,877,619 | 0.02% | 4q | +21.6%+$8.1M |
| GILDER GAGNON HOWE & CO LLC | $43.7M | 3,732,024 | 0.45% | 4q | HELD |
| BlackRock, Inc. | $41.0M | 3,496,273 | 0.00% | 4q | +2011.7%+$39.0M |
| BARINGS LLC | $37.6M | 3,128,867 | 0.67% | 4q | HELD |
| Azora Capital LP | $35.7M | 3,049,846 | 1.51% | 4q | +54.0%+$12.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $28.3M | 2,418,330 | 0.00% | 2q | +14.4%+$3.6M |
| JPMORGAN CHASE & CO | $27.5M | 2,176,807 | 0.00% | 4q | +7.7%+$2.0M |
| GOLDMAN SACHS GROUP INC | $23.6M | 2,013,582 | 0.00% | 4q | +4732.3%+$23.1M |
| Cresset Asset Management, LLC | $21.6M | 1,839,620 | 0.08% | 2q | HELD |
| CITADEL ADVISORS LLC | $21.1M incl. $583.7K options CALL | 1,747,985 | 0.00% | 4q | +52.8%+$7.3M |
| VANGUARD CAPITAL MANAGEMENT LLC | $19.4M | 1,657,197 | 0.00% | 2q | -14.5%-$3.3M |
| ALLIANCEBERNSTEIN L.P. | $19.3M | 1,447,153 | 0.01% | 4q | -48.3%-$18.1M |
| Owls Nest Partners IA, LLC | $14.7M | 1,251,884 | 4.76% | 2q | +497.0%+$12.2M |
| MARSHALL WACE, LLP | $13.0M | 1,109,675 | 0.01% | 4q | -51.2%-$13.6M |
| JANE STREET GROUP, LLC | $11.2M | 952,066 | 0.00% | 2q | +10.6%+$1.1M |
| STATE STREET CORP | $10.6M | 900,775 | 0.00% | 3q | +2314.6%+$10.1M |
| GEODE CAPITAL MANAGEMENT, LLC | $9.5M | 809,620 | 0.00% | new | NEW |
| G2 Investment Partners Management LLC | $7.5M | 640,000 | 1.37% | 3q | +71.7%+$3.1M |
| BANK OF AMERICA CORP /DE/ | $7.1M | 603,858 | 0.00% | 4q | +235.1%+$5.0M |
| UBS Group AG | $6.5M | 554,448 | 0.00% | 4q | -19.1%-$1.5M |
| Walleye Capital LLC | $6.3M | 541,257 | 0.02% | new | NEW |
| Lighthouse Investment Partners, LLC | $5.7M | 488,152 | 0.16% | 4q | +471.6%+$4.7M |
| ArrowMark Colorado Holdings LLC | $5.6M | 477,208 | 0.23% | 4q | -69.2%-$12.6M |
| PANAGORA ASSET MANAGEMENT INC | $4.8M | 408,931 | 0.01% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $4.4M | 372,813 | 0.00% | 3q | +22.1%+$791.9K |
| NORTHERN TRUST CORP | $4.3M | 369,625 | 0.00% | 3q | +2151.2%+$4.1M |
| XTX Topco Ltd | $3.8M | 322,417 | 0.05% | 4q | +35.7%+$993.2K |
| Holocene Advisors, LP | $3.5M | 300,000 | 0.01% | new | NEW |
| RENAISSANCE TECHNOLOGIES LLC | $3.5M | 296,100 | 0.00% | 3q | +7.0%+$228.5K |
| MORGAN STANLEY | $3.3M | 279,971 | 0.00% | 4q | -2.5%-$84.4K |
| Qube Research & Technologies Ltd | $2.8M | 239,317 | 0.00% | 2q | -74.3%-$8.1M |
| CANNELL CAPITAL LLC | $2.0M | 171,080 | 1.34% | 2q | +9.6%+$175.0K |
| Bank of New York Mellon Corp | $2.0M | 170,679 | 0.00% | 2q | +366.9%+$1.6M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.7M | 148,881 | 0.00% | new | NEW |
| BOOTHBAY FUND MANAGEMENT, LLC | $1.6M | 138,295 | 0.02% | 3q | +75.8%+$698.7K |
| Nuveen, LLC | $1.6M | 134,777 | 0.00% | new | NEW |
| Swiss National Bank | $1.4M | 117,100 | 0.00% | 3q | +50.3%+$459.4K |
| Burkehill Global Management, LP | $1.2M | 100,000 | 0.04% | 4q | HELD |
| GSA CAPITAL PARTNERS LLP | $1.2M | 98,911 | 0.07% | new | NEW |
| Engineers Gate Manager LP | $1.2M | 98,354 | 0.01% | 2q | +123.5%+$636.8K |
| VANGUARD FIDUCIARY TRUST CO | $1.1M | 92,404 | 0.00% | 2q | +92.7%+$520.9K |
| WELLS FARGO & COMPANY/MN | $1.0M | 85,940 | 0.00% | 2q | +197.9%+$669.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $943.7K incl. $134.8K options PUT | 69,019 | 0.00% | 2q | -90.3%-$8.7M |
| Militia Capital Management LLC | $937.6K | 80,000 | 0.03% | 2q | -82.2%-$4.3M |
| TIGER GLOBAL MANAGEMENT LLC | $879.0K | 75,000 | 0.00% | 4q | HELD |
| RHUMBLINE ADVISERS | $819.0K | 69,883 | 0.00% | new | NEW |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $769.9K | 65,691 | 0.00% | 3q | +87.8%+$360.0K |
| SEI INVESTMENTS CO | $763.5K | 65,141 | 0.00% | 4q | -11.9%-$103.1K |
| Woodline Partners LP | $674.5K | 57,554 | 0.00% | 4q | -84.3%-$3.6M |
| SummitTX Capital, L.P. | $663.2K | 56,584 | 0.02% | 4q | -10.2%-$75.2K |
| STATE OF WISCONSIN INVESTMENT BOARD | $619.3K | 52,843 | 0.00% | 3q | -1.2%-$7.3K |
| PRICE T ROWE ASSOCIATES INC /MD/ | $596.0K | 50,853 | 0.00% | new | NEW |
| VANGUARD ASSET MANAGEMENT, Ltd | $486.0K | 41,471 | 0.00% | 2q | +54.4%+$171.3K |
| Jackson Creek Investment Advisors LLC | $477.0K | 40,161 | 0.16% | new | NEW |
| Squarepoint Ops LLC | $473.8K | 40,428 | 0.00% | 4q | -81.0%-$2.0M |
| Legal & General Group Plc | $443.3K | 37,826 | 0.00% | 4q | +97.3%+$218.7K |
| MetLife Investment Management, LLC | $425.5K | 36,306 | 0.00% | new | NEW |
| Invesco Ltd. | $395.4K | 33,735 | 0.00% | new | NEW |
| CITIGROUP INC | $393.6K | 33,581 | 0.00% | 3q | +776.1%+$348.6K |
| FORMULA GROWTH LTD | $363.3K | 31,000 | 0.13% | new | NEW |
| JONES FINANCIAL COMPANIES LLLP | $348.0K | 25,329 | 0.00% | 3q | +79.4%+$154.0K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $335.1K | 28,594 | 0.00% | 2q | +179.5%+$215.2K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $328.4K | 28,023 | 0.00% | new | NEW |
| NATIXIS ADVISORS, LLC | $296.0K | 25,313 | 0.00% | 3q | +63.6%+$115.1K |
| DIVERSIFIED TRUST CO | $282.3K | 24,086 | 0.00% | new | NEW |
| Jupiter Topco LLC | $275.5K | 23,500 | 0.00% | new | FIRST |
| Yorktown Management & Research Co Inc | $267.2K | 22,800 | 0.16% | new | NEW |
| WINTON GROUP Ltd | $257.8K | 22,000 | 0.01% | 2q | +59.4%+$96.1K |
| NEW YORK STATE COMMON RETIREMENT FUND | $250.8K | 21,400 | 0.00% | new | NEW |
| BARCLAYS PLC | $241.8K | 20,631 | 0.00% | 3q | -55.8%-$305.4K |
| Graham Capital Management, L.P. | $234.4K | 20,001 | 0.00% | 2q | +46.8%+$74.8K |
| Police & Firemen's Retirement System of New Jersey | $211.3K | 18,025 | 0.00% | new | NEW |
| MILLENNIUM MANAGEMENT LLC | $205.0K | 17,491 | 0.00% | 4q | -86.0%-$1.3M |
| Quadrature Capital Ltd | $191.5K | 16,341 | 0.00% | 4q | -41.6%-$136.6K |
| ARIZONA STATE RETIREMENT SYSTEM | $188.8K | 16,108 | 0.00% | 3q | +48.6%+$61.8K |
| PEAK6 LLC | $178.1K CALL | options only | 0.00% | new | OPTIONS |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $155.9K | 13,300 | 0.00% | 3q | -58.8%-$222.7K |
| KLP KAPITALFORVALTNING AS | $154.7K | 13,200 | 0.00% | 3q | +55.3%+$55.1K |
| Entropy Technologies, LP | $151.8K | 12,954 | 0.01% | 2q | -27.7%-$58.1K |
| Virtu Financial LLC | $149.0K | 12,726 | 0.00% | new | NEW |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $148.1K | 12,633 | 0.00% | new | NEW |
| VOYA INVESTMENT MANAGEMENT LLC | $144.1K | 12,297 | 0.00% | new | NEW |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $143.5K | 12,245 | 0.00% | new | NEW |
| SG Americas Securities, LLC | $142.0K | 12,084 | 0.00% | new | NEW |
| Magnetar Financial LLC | $139.9K | 11,936 | 0.00% | new | NEW |
| RAYMOND JAMES FINANCIAL INC | $136.0K | 11,600 | 0.00% | new | NEW |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $134.9K | 11,512 | 0.00% | new | NEW |
| INTECH INVESTMENT MANAGEMENT LLC | $133.5K | 11,390 | 0.00% | new | NEW |
| TWO SIGMA INVESTMENTS, LP | $129.8K | 11,079 | 0.00% | new | NEW |
| State of Wyoming | $128.3K | 10,943 | 0.01% | 2q | +427.4%+$103.9K |
| Vanguard Investments Australia, Ltd. | $125.1K | 10,677 | 0.00% | 2q | HELD |
| ROYAL BANK OF CANADA | $120.0K | 10,214 | 0.00% | 4q | +32.2%+$29.2K |
| Pictet Asset Management Holding SA | $119.1K | 10,163 | 0.00% | new | NEW |
| GROUP ONE TRADING LLC | $118.4K CALL+PUT | options only | 0.00% | 4q | OPTIONS |
| PRUDENTIAL FINANCIAL INC | $118.0K | 10,070 | 0.00% | new | NEW |
| Caitong International Asset Management Co., Ltd | $80.6K | 6,873 | 0.01% | 2q | +4706.3%+$78.9K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-09-30 | 13G | Glazer Capital, LLCwith 1 co-filers | 5.0% |
Tender offers and delisting
Schedules TO, 13E-3 and 14D-9 and Form 25 filed in the last 180 days. Price a share is read from the filing itself where it states one plainly; a marker means we found no figure we could stand behind, and the reason is on it.
| Filed | What | Filed by | Price a share | Source |
|---|---|---|---|---|
| 2026-10-30 | Going private | itself | -? | filing |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-08-14 | 2026-08-13 | Material agreement entered | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-27 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 110,467 | $1.6M |
| 2026-07-28 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 104,647 | $1.5M |
| 2026-08-11 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 89,219 | $1.1M |
| 2026-07-14 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 83,119 | $1.1M |
| 2026-07-15 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 82,767 | $1.1M |
| 2026-06-23 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 76,464 | $1.0M |
| 2026-06-26 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 73,500 | $968.9K |
| 2026-06-25 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 73,500 | $959.8K |
| 2026-06-22 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 70,536 | $931.6K |
| 2026-08-10 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sold | 63,616 | $767.7K |
| 2026-06-23 | Hasley Nancy | Director | Sold | 35,000 | $458.9K |
| 2026-08-13 | Hasley Nancy | Director | Sold | 20,489 | $400.8K |
Ten percent owners and entities
Usually an institution that crossed a reporting threshold, or a company taking a strategic stake, rather than an individual with a view.
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-27 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 95,223 | $1.4M ×2 |
| 2026-07-20 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 80,000 | $1.1M |
| 2026-07-06 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 80,000 | $1.1M |
| 2026-07-13 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 80,000 | $1.1M |
| 2026-06-23 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 80,000 | $1.0M |
| 2026-06-29 | RADKE JEFFREY L | Co-Founder, CEO | Sold | 80,000 | $1.0M |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 19 | $162.9M | 8,256,979 | 12 | 2 | 3 | 0.0% |
| Q2 2026 | 118 | $762.1M | 64,484,068 | 38 | 42 | 26 | 0.1% |
| Q1 2026 | 108 | $759.7M | 55,873,389 | 27 | 36 | 21 | 0.1% |
| Q4 2025 | 99 | $816.5M | 50,442,604 | 36 | 23 | 28 | 0.1% |
| Q3 2025 | 89 | $754.1M | 50,857,962 | 92 | 0 | 0 | 0.3% |
