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ARX

Accelerant Holdings

Company with tickers: ARX

CIK
1997350
CUSIP
G00894108
Shares Outstanding
112,799,194
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 107
Total Value: $738,781,674
Total Shares: 55,298,034
Showing 1–100 of 108 holdings by value · page 1 of 2

Institutional Ownership Trend

3 quarters

Holder Concentration

Across 107 13F filers · Δ vs Dec 31, 2025
Top Holder
10.6%
Sep 2025 → Mar 2026 · range 10.6% – 12.1%
−1.4 pts
Top 5
39.7%
Sep 2025 → Mar 2026 · range 39.7% – 44.3%
−4.4 pts
Top 10
62.0%
Sep 2025 → Mar 2026 · range 62.0% – 68.9%
−6.9 pts
HHI
512
Sep 2025 → Mar 2026 · range 512 – 608
Broadly held −96

Quarterly Activity

vs Dec 31, 2025
New
34
Increased
33
Decreased
24
Sold Out
24
Unchanged
16
Holder count: +10
Institutional value: -7.7%
Shares held: +12.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Large MARSHALL WACE, LLP +1,926,005 2,274,152
Mega AMERICAN CENTURY COMPANIES INC +1,660,054 3,188,505
Small Keenan Capital, LLC +852,943 3,992,923
Mega CITADEL ADVISORS LLC +422,454 1,178,006
Small G2 Investment Partners Management LLC +279,470 372,811

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Small Grandeur Peak Global Advisors, LLC −1,581,449 39,573
Mega Capital World Investors −614,890 5,152,741
Mid Azora Capital LP −458,883 1,980,211
Mega GOLDMAN SACHS GROUP INC −260,957 41,669
Mega BANK OF AMERICA CORP /DE/ −155,553 180,186

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 2,113,565 $28,237,228
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,938,938 $25,904,211
Large Cresset Asset Management, LLC 1,839,620 $24,577,323
Mega T. Rowe Price Investment Management, Inc. 975,936 $13,038,504
Large Qube Research & Technologies Ltd 930,942 $12,437,385

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Large Balyasny Asset Management L.P. 2,733,595 $44,694,278
Mega VANGUARD GROUP INC 2,173,243 $35,532,523
Mega NORGES BANK 665,076 $10,873,992
Large FRED ALGER MANAGEMENT, LLC 439,698 $7,189,061
Large TEACHER RETIREMENT SYSTEM OF TEXAS 176,043 $2,878,303
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Micro SECURITY BENEFIT LIFE INSURANCE CO /KS/ $78,373,193 10.61% 5,866,257 View
Mega Capital World Investors $68,840,619 9.32% 5,152,741 View
Small Keenan Capital, LLC $53,345,451 7.22% 3,992,923 View
Mid GILDER GAGNON HOWE & CO LLC $50,011,343 6.77% 3,743,364 View
Mega AMERICAN CENTURY COMPANIES INC $42,598,426 5.77% 3,188,505 View
Mid BARINGS LLC $41,801,663 5.66% 3,128,867 View
Mega ALLIANCEBERNSTEIN L.P. $37,410,511 5.06% 2,800,188 View
Large MARSHALL WACE, LLP $30,382,670 4.11% 2,274,152 View
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $28,237,228 3.82% 2,113,565 View
Mega JPMORGAN CHASE & CO $26,992,115 3.65% 2,020,368 View
Mid Azora Capital LP $26,455,618 3.58% 1,980,211 View
Mega VANGUARD CAPITAL MANAGEMENT LLC $25,904,211 3.51% 1,938,938 View
Large Cresset Asset Management, LLC $24,577,323 3.33% 1,839,620 View
Mega FMR LLC $24,211,084 3.28% 1,812,207 View
Mid ArrowMark Colorado Holdings LLC $20,684,272 2.80% 1,548,224 View
Large BAMCO INC /NY/ $16,149,487 2.19% 1,208,794 View
Mega CITADEL ADVISORS LLC $15,286,591 2.07% 1,144,206 View
Mega T. Rowe Price Investment Management, Inc. $13,038,504 1.76% 975,936 View
Large Qube Research & Technologies Ltd $12,437,385 1.68% 930,942 View
Mega JANE STREET GROUP, LLC $11,498,911 1.56% 860,697 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $9,459,494 1.28% 708,046 View
Mega UBS Group AG $9,160,243 1.24% 685,647 View
Small G2 Investment Partners Management LLC $4,980,754 0.67% 372,811 View
Large Woodline Partners LP $4,905,217 0.66% 367,157 View
Mega BNP PARIBAS ARBITRAGE, SA $4,078,059 0.55% 305,244 View
Large RENAISSANCE TECHNOLOGIES LLC $3,695,376 0.50% 276,600 View
Mid XTX Topco Ltd $3,175,257 0.43% 237,669 View
Large Squarepoint Ops LLC $2,842,887 0.38% 212,791 View
Small Owls Nest Partners IA, LLC $2,801,685 0.38% 209,707 View
Mid SEVEN GRAND MANAGERS, LLC $2,672,000 0.36% 200,000 View
Mega BANK OF AMERICA CORP /DE/ $2,407,284 0.33% 180,186 View
Large Point72 Asset Management, L.P. $2,227,005 0.30% 166,692 View
Mega BlackRock, Inc. $2,211,932 0.30% 165,564 View
Small CANNELL CAPITAL LLC $2,086,150 0.28% 156,149 View
Small Militia Capital Management LLC $2,004,000 0.27% 150,000 View
Large Trexquant Investment LP $1,992,229 0.27% 149,119 View
Small Robertson Opportunity Capital, LLC $1,803,760 0.24% 135,012 View
Mega MILLENNIUM MANAGEMENT LLC $1,670,908 0.23% 125,068 View
Large Schonfeld Strategic Advisors LLC $1,520,301 0.21% 113,795 View
Mid Burkehill Global Management, LP $1,336,000 0.18% 100,000 View
Large Jain Global LLC $1,154,544 0.16% 86,418 View
Mid Lighthouse Investment Partners, LLC $1,141,024 0.15% 85,406 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,104,604 0.15% 82,680 View
Mid BOOTHBAY FUND MANAGEMENT, LLC $1,051,124 0.14% 78,677 View
Mega Swiss National Bank $1,040,744 0.14% 77,900 View
Large TIGER GLOBAL MANAGEMENT LLC $1,002,000 0.14% 75,000 View
Large SEI INVESTMENTS CO $987,771 0.13% 73,935 View
Mid SummitTX Capital, L.P. $841,666 0.11% 62,999 View
Large Hudson Bay Capital Management LP $738,487 0.10% 55,276 View
Mid Brevan Howard Capital Management LP $726,997 0.10% 54,416 View
Large STATE OF WISCONSIN INVESTMENT BOARD $714,265 0.10% 53,463 View
Mid Interval Partners, LP $661,774 0.09% 49,534 View
Mega VANGUARD FIDUCIARY TRUST CO $640,745 0.09% 47,960 View
Mega BARCLAYS PLC $623,817 0.08% 46,693 View
Mid Engineers Gate Manager LP $588,053 0.08% 44,016 View
Mid Jump Financial, LLC $587,906 0.08% 44,005 View
Mega GOLDMAN SACHS GROUP INC $556,697 0.08% 41,669 View
Small Grandeur Peak Global Advisors, LLC $528,695 0.07% 39,573 View
Large Jefferies Financial Group Inc. $523,418 0.07% 39,178 View
Mid Aquatic Capital Management LLC $500,131 0.07% 37,435 View
Mega STATE STREET CORP $498,408 0.07% 37,306 View
Mega Bank of New York Mellon Corp $488,387 0.07% 36,556 View
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $467,225 0.06% 34,972 View
Small Catalyst Funds Management Pty Ltd $466,264 0.06% 34,900 View
Mega CITADEL ADVISORS LLC $451,568 0.06% 33,800 View
Large Zurcher Kantonalbank (Zurich Cantonalbank) $431,528 0.06% 32,300 View
Mega WELLS FARGO & COMPANY/MN $385,436 0.05% 28,850 View
Mid Quadrature Capital Ltd $374,080 0.05% 28,000 View
Mega VANGUARD ASSET MANAGEMENT, Ltd $358,796 0.05% 26,856 View
Mid LANDSCAPE CAPITAL MANAGEMENT, L.L.C. $357,619 0.05% 26,768 View
Mega JANUS HENDERSON GROUP PLC $313,960 0.04% 23,500 View
Large Centiva Capital, LP $273,118 0.04% 20,443 View
Mega Legal & General Group Plc $256,070 0.03% 19,167 View
Mid Entropy Technologies, LP $239,264 0.03% 17,909 View
Large NATIXIS ADVISORS, LLC $206,679 0.03% 15,470 View
Large Man Group plc $188,963 0.03% 14,144 View
Mid JONES FINANCIAL COMPANIES LLLP $188,616 0.03% 14,118 View
Mid WINTON GROUP Ltd $184,368 0.02% 13,800 View
Mid Graham Capital Management, L.P. $181,989 0.02% 13,622 View
Large LMR Partners LLP $155,937 0.02% 11,672 View
Large ARIZONA STATE RETIREMENT SYSTEM $144,795 0.02% 10,838 View
Large Vanguard Investments Australia, Ltd. $142,644 0.02% 10,677 View
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE $136,659 0.02% 10,229 View
Small Arcus Capital Partners, LLC $134,936 0.02% 10,100 View
Mid WESBANCO BANK INC $133,600 0.02% 10,000 View
Mid NORTHERN TRUST CORP $116,980 0.02% 8,756 View
Large KLP KAPITALFORVALTNING AS $113,560 0.02% 8,500 View
Mega ROYAL BANK OF CANADA $103,258 0.01% 7,729 View
Large CWM, LLC $89,057 0.01% 6,666 View
Mid PNC FINANCIAL SERVICES GROUP, INC. $82,256 0.01% 6,157 View
Mega CITIGROUP INC $51,208 0.01% 3,833 View
Small State of Wyoming $27,722 0.00% 2,075 View
Mid Federation des caisses Desjardins du Quebec $10,020 0.00% 750 View
Mid FIRST HORIZON CORP $9,044 0.00% 677 View
Mid Parallel Advisors, LLC $8,897 0.00% 666 View
Mid SIMPLEX TRADING, LLC $7,454 0.00% 558 View
Mid OSAIC HOLDINGS, INC. $3,006 0.00% 225 View
Micro Rachor Investment Advisory Services, LLC $2,792 0.00% 209 View
Mid Tower Research Capital LLC (TRC) $2,672 0.00% 200 View
Small SJS Investment Consulting Inc. $2,191 0.00% 164 View
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