ARX Accelerant Holdings
Accelerant Holdings (ARX) Institutional Ownership
What the institutions did with ARX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| SECURITY BENEFIT LIFE INSURANCE CO /KS/ | 5.9M | 9.1% |
| FMR LLC | 5.6M | 8.7% |
| Capital World Investors | 4.6M | 7.2% |
| Keenan Capital, LLC | 4.0M | 6.2% |
| AMERICAN CENTURY COMPANIES INC | 3.9M | 6.0% |
| GILDER GAGNON HOWE & CO LLC | 3.7M | 5.8% |
| BlackRock, Inc. | 3.5M | 5.4% |
| BARINGS LLC | 3.1M | 4.9% |
| Azora Capital LP | 3.0M | 4.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.4M | 3.8% |
| JPMORGAN CHASE & CO | 2.2M | 3.4% |
| GOLDMAN SACHS GROUP INC | 2.0M | 3.1% |
| Cresset Asset Management, LLC | 1.8M | 2.9% |
| CITADEL ADVISORS LLC | 1.7M | 2.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | 2.6% |
| ALLIANCEBERNSTEIN L.P. | 1.4M | 2.2% |
| Owls Nest Partners IA, LLC | 1.3M | 1.9% |
| MARSHALL WACE, LLP | 1.1M | 1.7% |
| JANE STREET GROUP, LLC | 952.1K | 1.5% |
| STATE STREET CORP | 900.8K | 1.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 809.6K | 1.3% |
| G2 Investment Partners Management LLC | 640.0K | 1.0% |
| BANK OF AMERICA CORP /DE/ | 603.9K | 0.9% |
| UBS Group AG | 554.4K | 0.9% |
| Walleye Capital LLC | 541.3K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 1.8M | 5.6M | +3.8M |
| BlackRock, Inc. | Increased | 165.6K | 3.5M | +3.3M |
| GOLDMAN SACHS GROUP INC | Increased | 41.7K | 2.0M | +2.0M |
| ALLIANCEBERNSTEIN L.P. | Reduced | 2.8M | 1.4M | -1.4M |
| BAMCO INC /NY/ | Sold Out | 1.2M | 0 | -1.2M |
| MARSHALL WACE, LLP | Reduced | 2.3M | 1.1M | -1.2M |
| ArrowMark Colorado Holdings LLC | Reduced | 1.5M | 477.2K | -1.1M |
| Azora Capital LP | Increased | 2.0M | 3.0M | +1.1M |
| Owls Nest Partners IA, LLC | Increased | 209.7K | 1.3M | +1.0M |
| T. Rowe Price Investment Management, Inc. | Sold Out | 975.9K | 0 | -975.9K |
| STATE STREET CORP | Increased | 37.3K | 900.8K | +863.5K |
| GEODE CAPITAL MANAGEMENT, LLC | New | 0 | 809.6K | +809.6K |
| Qube Research & Technologies Ltd | Reduced | 930.9K | 239.3K | -691.6K |
| AMERICAN CENTURY COMPANIES INC | Increased | 3.2M | 3.9M | +689.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 708.0K | 69.0K | -639.0K |
| CITADEL ADVISORS LLC | Increased | 1.1M | 1.7M | +603.8K |
| Walleye Capital LLC | New | 0 | 541.3K | +541.3K |
| Capital World Investors | Reduced | 5.2M | 4.6M | -526.1K |
| BANK OF AMERICA CORP /DE/ | Increased | 180.2K | 603.9K | +423.7K |
| PANAGORA ASSET MANAGEMENT INC | New | 0 | 408.9K | +408.9K |
| Lighthouse Investment Partners, LLC | Increased | 85.4K | 488.2K | +402.7K |
| Militia Capital Management LLC | Reduced | 450.0K | 80.0K | -370.0K |
| NORTHERN TRUST CORP | Increased | 16.4K | 369.6K | +353.2K |
| Woodline Partners LP | Reduced | 367.2K | 57.6K | -309.6K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.1M | 2.4M | +304.8K |
| Holocene Advisors, LP | New | 0 | 300.0K | +300.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 1.9M | 1.7M | -281.7K |
| G2 Investment Partners Management LLC | Increased | 372.8K | 640.0K | +267.2K |
| SEVEN GRAND MANAGERS, LLC | Sold Out | 200.0K | 0 | -200.0K |
| Squarepoint Ops LLC | Reduced | 212.8K | 40.4K | -172.4K |
| Point72 Asset Management, L.P. | Sold Out | 166.7K | 0 | -166.7K |
| JPMORGAN CHASE & CO | Increased | 2.0M | 2.2M | +156.4K |
| Trexquant Investment LP | Sold Out | 149.1K | 0 | -149.1K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | New | 0 | 148.9K | +148.9K |
| Robertson Opportunity Capital, LLC | Sold Out | 135.0K | 0 | -135.0K |
| Nuveen, LLC | New | 0 | 134.8K | +134.8K |
| Bank of New York Mellon Corp | Increased | 36.6K | 170.7K | +134.1K |
| UBS Group AG | Reduced | 685.6K | 554.4K | -131.2K |
| Schonfeld Strategic Advisors LLC | Sold Out | 113.8K | 0 | -113.8K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 125.1K | 17.5K | -107.6K |
| GSA CAPITAL PARTNERS LLP | New | 0 | 98.9K | +98.9K |
| JANE STREET GROUP, LLC | Increased | 860.7K | 952.1K | +91.4K |
| Jain Global LLC | Sold Out | 86.4K | 0 | -86.4K |
| XTX Topco Ltd | Increased | 237.7K | 322.4K | +84.7K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Sold Out | 82.7K | 0 | -82.7K |
| RHUMBLINE ADVISERS | New | 0 | 69.9K | +69.9K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 305.2K | 372.8K | +67.6K |
| BOOTHBAY FUND MANAGEMENT, LLC | Increased | 78.7K | 138.3K | +59.6K |
| WELLS FARGO & COMPANY/MN | Increased | 28.9K | 85.9K | +57.1K |
| Hudson Bay Capital Management LP | Sold Out | 55.3K | 0 | -55.3K |
| Brevan Howard Capital Management LP | Sold Out | 54.4K | 0 | -54.4K |
| Engineers Gate Manager LP | Increased | 44.0K | 98.4K | +54.3K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 50.9K | +50.9K |
| Interval Partners, LP | Sold Out | 49.5K | 0 | -49.5K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 48.0K | 92.4K | +44.4K |
| Jump Financial, LLC | Sold Out | 44.0K | 0 | -44.0K |
| Jackson Creek Investment Advisors LLC | New | 0 | 40.2K | +40.2K |
| Grandeur Peak Global Advisors, LLC | Sold Out | 39.6K | 0 | -39.6K |
| Swiss National Bank | Increased | 77.9K | 117.1K | +39.2K |
| Jefferies Financial Group Inc. | Sold Out | 39.2K | 0 | -39.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.