ARX Institutional Ownership & Shareholders
Accelerant Holdings (ARX) is currently held by 128 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $889.96M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Deer Park Road Corp is currently the largest disclosed institutional shareholder of ARX tracked by InsiderSet, reporting ownership valued at approximately $90.64M in its September 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $91.06M, representing an estimated gain of +0.46% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% of the total disclosed ARX value among the investors covered in this analysis. Major shareholders include Deer Park Road Corp, Security Benefit Life Insurance Co, Fmr Llc, and several other long-term asset managers with concentrated positions in Accelerant Holdings (ARX).
This page ranks the largest institutional ARX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
128
Total Reported Value
$889.96M
Largest Holder
Deer Park Road Corp
Largest Position
$90.64M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
159
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Deer Park Road Corp | 82.53% | 4,594,265 | $90,644,848 | $91,058,332 | +$413,484 | +0.46% | |
| Security Benefit Life Insurance Co | 37.88% | 5,866,257 | $68,752,532 | $116,269,214 | +$47,516,682 | +69.11% | |
| Fmr Llc | 0.00% | 5,628,679 | $65,968,117 | $111,560,418 | +$45,592,301 | +69.11% | |
| Barings Llc | 1.06% | 3,128,867 | $61,732,546 | $62,014,144 | +$281,598 | +0.46% | |
| Capital World Investors | 0.01% | 4,626,664 | $54,224,502 | $91,700,480 | +$37,475,978 | +69.11% | |
| Keenan Capital, Llc | 9.25% | 3,992,923 | $46,797,058 | $79,139,734 | +$32,342,676 | +69.11% | |
| American Century Companies Inc | 0.02% | 3,877,619 | $45,445,695 | $76,854,409 | +$31,408,714 | +69.11% | |
| Gilder Gagnon Howe & Co Llc | 0.45% | 3,732,024 | $43,739,321 | $73,968,716 | +$30,229,395 | +69.11% | |
| Blackrock, Inc. | 0.00% | 3,496,273 | $40,976,318 | $69,296,131 | +$28,319,813 | +69.11% | |
| Azora Capital Lp | 1.51% | 3,049,846 | $35,744,195 | $60,447,948 | +$24,703,753 | +69.11% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,418,330 | $28,342,828 | $47,931,301 | +$19,588,473 | +69.11% | |
| Jpmorgan Chase & Co | 0.00% | 2,176,807 | $27,493,072 | $43,144,315 | +$15,651,243 | +56.93% | |
| Goldman Sachs Group Inc | 0.00% | 2,013,582 | $23,599,181 | $39,909,195 | +$16,310,014 | +69.11% | |
| Cresset Asset Management, Llc | 0.08% | 1,839,620 | $21,560,346 | $36,461,268 | +$14,900,922 | +69.11% | |
| Citadel Advisors Llc | 0.01% | 1,747,985 | $20,486,384 | $34,645,063 | +$14,158,679 | +69.11% | |
| Vanguard Capital Management Llc | 0.00% | 1,657,197 | $19,422,349 | $32,845,645 | +$13,423,296 | +69.11% | |
| Alliancebernstein L.P. | 0.01% | 1,447,153 | $19,333,964 | $28,682,572 | +$9,348,608 | +48.35% | |
| Owls Nest Partners Ia, Llc | 4.76% | 1,251,884 | $14,672,080 | $24,812,341 | +$10,140,261 | +69.11% | |
| Marshall Wace, Llp | 0.01% | 1,109,675 | $13,005,388 | $21,993,759 | +$8,988,371 | +69.11% | |
| Jane Street Group, Llc | 0.01% | 952,066 | $11,158,214 | $18,869,948 | +$7,711,734 | +69.11% | |
| State Street Corp | 0.00% | 900,775 | $10,557,083 | $17,853,361 | +$7,296,278 | +69.11% | |
| Geode Capital Management, Llc | 0.00% | 809,620 | $9,488,746 | $16,046,668 | +$6,557,922 | +69.11% | |
| G2 Investment Partners Management Llc | 1.37% | 640,000 | $7,500,800 | $12,684,800 | +$5,184,000 | +69.11% | |
| Bank Of America Corp | 0.00% | 603,858 | $7,077,216 | $11,968,466 | +$4,891,250 | +69.11% | |
| Ubs Group Ag | 0.00% | 554,448 | $6,498,131 | $10,989,159 | +$4,491,028 | +69.11% | |
| Walleye Capital Llc | 0.03% | 541,257 | $6,343,532 | $10,727,714 | +$4,384,182 | +69.11% | |
| Lighthouse Investment Partners, Llc | 0.18% | 488,152 | $5,721,141 | $9,675,173 | +$3,954,032 | +69.11% | |
| Arrowmark Colorado Holdings Llc | 0.23% | 477,208 | $5,592,878 | $9,458,263 | +$3,865,385 | +69.11% | |
| Tokio Marine Asset Management Co Ltd | 0.14% | 244,000 | $4,814,120 | $4,836,080 | +$21,960 | +0.46% | |
| Panagora Asset Management Inc | 0.01% | 408,931 | $4,792,671 | $8,105,012 | +$3,312,341 | +69.11% | |
| Bnp Paribas Financial Markets | 0.00% | 372,813 | $4,369,368 | $7,389,154 | +$3,019,786 | +69.11% | |
| Northern Trust Corp | 0.00% | 369,625 | $4,332,005 | $7,325,968 | +$2,993,963 | +69.11% | |
| Xtx Topco Ltd | 0.05% | 322,417 | $3,778,727 | $6,390,305 | +$2,611,578 | +69.11% | |
| Crestwood Advisors Group, Llc | 0.06% | 190,408 | $3,756,750 | $3,773,887 | +$17,137 | +0.46% | |
| Holocene Advisors, Lp | 0.01% | 300,000 | $3,516,000 | $5,946,000 | +$2,430,000 | +69.11% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 296,100 | $3,470,292 | $5,868,702 | +$2,398,410 | +69.11% |
| Morgan Stanley | 0.00% | 279,971 | $3,281,259 | $5,549,025 | +$2,267,766 | +69.11% | |
| Qube Research & Technologies Ltd | 0.00% | 239,317 | $2,804,795 | $4,743,263 | +$1,938,468 | +69.11% | |
| Neuberger Berman Group Llc | 0.00% | 160,047 | $2,616,768 | $3,172,132 | +$555,364 | +21.22% | |
| Cannell Capital Llc | 1.40% | 171,080 | $2,005,058 | $3,390,806 | +$1,385,748 | +69.11% | |
| Bank Of New York Mellon Corp | 0.00% | 170,679 | $2,000,359 | $3,382,858 | +$1,382,499 | +69.11% | |
| Transmarket Holdings Lp | 0.99% | 89,851 | $1,772,760 | $1,780,847 | +$8,087 | +0.46% | |
| Charles Schwab Investment Management Inc | 0.00% | 148,881 | $1,744,885 | $2,950,821 | +$1,205,936 | +69.11% | |
| Boothbay Fund Management, Llc | 0.03% | 138,295 | $1,620,817 | $2,741,007 | +$1,120,190 | +69.11% | |
| Nuveen, Llc | 0.00% | 134,777 | $1,579,586 | $2,671,280 | +$1,091,694 | +69.11% | |
| Swiss National Bank | 0.00% | 117,100 | $1,372,412 | $2,320,922 | +$948,510 | +69.11% | |
| Burkehill Global Management, Lp | 0.04% | 100,000 | $1,172,000 | $1,982,000 | +$810,000 | +69.11% | |
| Gsa Capital Partners Llp | 0.07% | 98,911 | $1,159,000 | $1,960,416 | +$801,416 | +69.15% | |
| Engineers Gate Manager Lp | 0.01% | 98,354 | $1,152,709 | $1,949,376 | +$796,667 | +69.11% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 82,680 | $1,104,605 | $1,638,718 | +$534,113 | +48.35% |
Frequently asked questions about ARX
Who are the largest institutional holders of ARX?
The largest institutional holders of ARX reported in the latest SEC Form 13F filings include Deer Park Road Corp, Security Benefit Life Insurance Co, Fmr Llc, Barings Llc, and Capital World Investors. InsiderSet ranks institutional holders by their latest reported ARX position.
What is ARX institutional ownership?
This page tracks ARX positions reported by institutional investment managers through SEC Form 13F. Accelerant Holdings (ARX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ARX?
InsiderSet currently tracks 128 institutional managers reporting ARX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ARX shareholders.
How much ARX stock do institutions own?
Institutional investment managers disclosed approximately $889.96M in ARX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ARX institutional ownership last updated?
The latest ARX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ARX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ARX position after the reporting date.
Are institutions buying or selling ARX?
Institutional buying and selling can be analyzed by comparing ARX positions across consecutive 13F reporting periods. InsiderSet's ARX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ARX ownership changes.
How has ARX institutional ownership changed over time?
InsiderSet tracks ARX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.