Accelerant Holdings ARX Institutional Ownership

NYSE ARX

$19.59 +0.02 (+0.10%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

107 Institutions

Increased 71 66.4%

Unchanged 14 13.1%

Reduced 22 20.6%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

25.05%

▼-0.77 pp QoQ

Shares Held by Institutions

55.60Mn

of 221.98Mn outstanding

▲+40.17% QoQ

Shares Outstanding

221.98Mn

166.39Mn held outside 13F filers

Institutional Investors

107

filed 13F for Mar 2026

▲+11 vs prior quarter

Net Shares Added (QoQ)

+15.93Mn

accumulated since last quarter

Value of Holdings

$1.09Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

Accelerant Holdings (NYSE:ARX) showed up in the 13F filings of 107 institutional investors as of March 2026.

These investors collectively held 25.0% of Accelerant Holdings's outstanding shares in March 2026, down from 25.8% in December 2025.
They increased total shares held in Accelerant Holdings by 40.17% from last quarter, and the number of investors in ARX stayed flat annually.
Of these 107 holders, 71 added to their stakes in Accelerant Holdings, 22 trimmed positions, and 14 made no changes.
Altogether, these fund groups held 55.6Mn shares in ARX by March 2026, up by 15.93Mn shares quarter on quarter, and with no net change year over year.
SECURITY BENEFIT LIFE INSURANCE CO /KS/ holds the largest position in ARX at 5.87Mn shares as of March 31, 2026, or 2.64% of shares outstanding.
Leading buyers of Accelerant Holdings shares for the quarter ending March 2026 were GILDER GAGNON HOWE & CO LLC (3.74Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.11Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.94Mn), MARSHALL WACE, LLP (1.93Mn), Cresset Asset Management, LLC (1.84Mn).
The biggest sellers of Accelerant Holdings for the quarter ending March 2026 included Grandeur Peak Global Advisors, LLC (1.58Mn), Capital World Investors (614.89K), Goldman Sachs Group Inc (563.58K), Azora Capital LP (458.88K), T. Rowe Price Investment Management, Inc. (371.95K).
According to Business Quant data, leading holders of ARX for March 2026 are SECURITY BENEFIT LIFE INSURANCE CO /KS/ (5.87Mn), Capital World Investors (5.15Mn), Keenan Capital, LLC (3.99Mn), GILDER GAGNON HOWE & CO LLC (3.74Mn), AMERICAN CENTURY COMPANIES INC (3.19Mn), BARINGS LLC (3.13Mn), ALLIANCEBERNSTEIN L.P. (2.8Mn), MARSHALL WACE, LLP (2.27Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.11Mn), Jpmorgan Chase & Co (2.02Mn).

Form 13F Holdings

107 Institutional Holders

Report period 31 Mar, 2026

Total shares held 55.60Mn

Of outstanding 25.05%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	SECURITY BENEFIT LIFE INSURANCE CO /KS/	0000869772	5,866,257	2.64%	0	0.00%	$78.37Mn
2	Capital World Investors	0001422849	5,152,741	2.32%	▼614,890	-10.66%	$68.84Mn
3	Keenan Capital, LLC	0001647363	3,992,923	1.80%	▲852,943	+27.16%	$53.35Mn
4	GILDER GAGNON HOWE & CO LLC	0000902464	3,743,364	1.69%	▲3,743,364	0.00%	$50.01Mn
5	AMERICAN CENTURY COMPANIES INC	0000748054	3,188,505	1.44%	▲1,660,054	+108.61%	$42.60Mn
6	BARINGS LLC	0000009015	3,128,867	1.41%	0	0.00%	$46.06Mn
7	ALLIANCEBERNSTEIN L.P.	0001109448	2,800,188	1.26%	▼46,280	-1.63%	$45.78Mn
8	MARSHALL WACE, LLP	0001318757	2,274,152	1.02%	▲1,926,005	+553.22%	$30.38Mn
9	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	2,113,565	0.95%	▲2,113,565	0.00%	$28.24Mn
10	Jpmorgan Chase & Co	0000019617	2,020,368	0.91%	▲67,372	+3.45%	$26.89Mn
11	Azora Capital LP	0001700272	1,980,211	0.89%	▼458,883	-18.81%	$26.46Mn
12	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,938,938	0.87%	▲1,938,938	0.00%	$25.90Mn
13	Cresset Asset Management, LLC	0001761013	1,839,620	0.83%	▲1,839,620	0.00%	$24.58Mn
14	FMR LLC	0000315066	1,812,207	0.82%	▲24,072	+1.35%	$24.21Mn
15	ArrowMark Colorado Holdings LLC	0001483859	1,548,224	0.70%	▼95,789	-5.83%	$20.68Mn
16	BAMCO INC /NY/	0001017918	1,208,794	0.54%	▼320	-0.03%	$16.15Mn
17	CITADEL ADVISORS LLC	0001423053	1,144,206	0.52%	▲428,754	+59.93%	$15.29Mn
18	T. Rowe Price Investment Management, Inc.	0001897612	975,936	0.44%	▼371,950	-27.60%	$13.04K
19	Qube Research & Technologies Ltd	0001729829	930,942	0.42%	▲930,942	0.00%	$12.44Mn
20	JANE STREET GROUP, LLC	0001595888	860,697	0.39%	▲860,697	0.00%	$11.50Mn

Showing 1 to 20 of 107 holders