Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Accelerant Holdings

CIK 0001997350ARX· quarter ending 2026-06-30

Shares outstanding

217,188,552

as of 2026-08-07 · 10-Q cover page, filed 2026-08-13

Held by 13F filers

64,484,068

54.4% of Common Class A

Holders

116

+9 vs 2026-03-31 · 37 new, 28 exited

Value

$761.1M

shares +15.4% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-13, as of 2026-08-07)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common Class A	ARX · NYSE	118,548,679	64,484,068	54.4%	116	G00894108
Common Class B	not listed	98,639,873	—	—

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	G00894108	CL A	116	64,484,068	118,548,679	54.4%	$761.1M	2 call / 1 put	13DG	holders →
	007767106	COMMON STOCKnot common	1	1	—	—	$11	—	NPORT	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (116 of 116 · G00894108)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	SECURITY BENEFIT LIFE INSURANCE CO /KS/	5,866,257	4.95%	$68.8M	—
2	FMR LLC	5,628,679	4.75%	$66.0M	+3,816,472 (+210.6%)
3	Capital World Investors	4,626,664	3.90%	$54.2M	-526,077 (-10.2%)
4	Keenan Capital, LLC	3,992,923	3.37%	$46.8M	—
5	AMERICAN CENTURY COMPANIES INC	3,877,619	3.27%	$45.4M	+689,114 (+21.6%)
6	GILDER GAGNON HOWE & CO LLC	3,732,024	3.15%	$43.7M	-11,340 (-0.3%)
7	BlackRock, Inc.	3,496,273	2.95%	$41.0M	+3,330,709 (+2011.7%)
8	BARINGS LLC	3,128,867	2.64%	$37.6M	—
9	Azora Capital LP	3,049,846	2.57%	$35.7M	+1,069,635 (+54.0%)
10	VANGUARD PORTFOLIO MANAGEMENT LLC	2,418,330	2.04%	$28.3M	+304,765 (+14.4%)
11	JPMORGAN CHASE & CO	2,176,807	1.84%	$27.5M	+156,439 (+7.7%)
12	GOLDMAN SACHS GROUP INC	2,013,582	1.70%	$23.6M	+1,971,913 (+4732.3%)
13	Cresset Asset Management, LLC	1,839,620	1.55%	$21.6M	—
14	CITADEL ADVISORS LLC	1,747,985	1.47%	$20.5M	+603,779 (+52.8%)
15	VANGUARD CAPITAL MANAGEMENT LLC	1,657,197	1.40%	$19.4M	-281,741 (-14.5%)
16	ALLIANCEBERNSTEIN L.P.	1,447,153	1.22%	$19.3M	-1,353,035 (-48.3%)
17	Owls Nest Partners IA, LLC	1,251,884	1.06%	$14.7M	+1,042,177 (+497.0%)
18	MARSHALL WACE, LLP	1,109,675	0.94%	$13.0M	-1,164,477 (-51.2%)
19	JANE STREET GROUP, LLC	952,066	0.80%	$11.2M	+91,369 (+10.6%)
20	STATE STREET CORP	900,775	0.76%	$10.6M	+863,469 (+2314.6%)
21	GEODE CAPITAL MANAGEMENT, LLC	809,620	0.68%	$9.5M	NEW
22	G2 Investment Partners Management LLC	640,000	0.54%	$7.5M	+267,189 (+71.7%)
23	BANK OF AMERICA CORP /DE/	603,858	0.51%	$7.1M	+423,672 (+235.1%)
24	UBS Group AG	554,448	0.47%	$6.5M	-131,199 (-19.1%)
25	Walleye Capital LLC	541,257	0.46%	$6.3M	NEW
26	Lighthouse Investment Partners, LLC	488,152	0.41%	$5.7M	+402,746 (+471.6%)
27	ArrowMark Colorado Holdings LLC	477,208	0.40%	$5.6M	-1,071,016 (-69.2%)
28	PANAGORA ASSET MANAGEMENT INC	408,931	0.34%	$4.8M	NEW
29	BNP PARIBAS FINANCIAL MARKETS	372,813	0.31%	$4.4M	+67,569 (+22.1%)
30	NORTHERN TRUST CORP	369,625	0.31%	$4.3M	+353,206 (+2151.2%)
31	XTX Topco Ltd	322,417	0.27%	$3.8M	+84,748 (+35.7%)
32	Holocene Advisors, LP	300,000	0.25%	$3.5M	NEW
33	RENAISSANCE TECHNOLOGIES LLC	296,100	0.25%	$3.5M	+19,500 (+7.0%)
34	MORGAN STANLEY	279,971	0.24%	$3.3M	-7,204 (-2.5%)
35	Qube Research & Technologies Ltd	239,317	0.20%	$2.8M	-691,625 (-74.3%)
36	CANNELL CAPITAL LLC	171,080	0.14%	$2.0M	+14,931 (+9.6%)
37	Bank of New York Mellon Corp	170,679	0.14%	$2.0M	+134,123 (+366.9%)
38	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	148,881	0.13%	$1.7M	NEW
39	BOOTHBAY FUND MANAGEMENT, LLC	138,295	0.12%	$1.6M	+59,618 (+75.8%)
40	Nuveen, LLC	134,777	0.11%	$1.6M	NEW
41	Swiss National Bank	117,100	0.10%	$1.4M	+39,200 (+50.3%)
42	Burkehill Global Management, LP	100,000	0.08%	$1.2M	—
43	GSA CAPITAL PARTNERS LLP	98,911	0.08%	$1.2M	NEW
44	Engineers Gate Manager LP	98,354	0.08%	$1.2M	+54,338 (+123.5%)
45	VANGUARD FIDUCIARY TRUST CO	92,404	0.08%	$1.1M	+44,444 (+92.7%)
46	WELLS FARGO & COMPANY/MN	85,940	0.07%	$1.0M	+57,090 (+197.9%)
47	Militia Capital Management LLC	80,000	0.07%	$938K	-370,000 (-82.2%)
48	TIGER GLOBAL MANAGEMENT LLC	75,000	0.06%	$879K	—
49	RHUMBLINE ADVISERS	69,883	0.06%	$819K	NEW
50	SUSQUEHANNA INTERNATIONAL GROUP, LLP	69,019	0.06%	$809K	-639,027 (-90.3%)
51	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	65,691	0.06%	$770K	+30,719 (+87.8%)
52	SEI INVESTMENTS CO	65,141	0.05%	$763K	-8,794 (-11.9%)
53	Woodline Partners LP	57,554	0.05%	$675K	-309,603 (-84.3%)
54	SummitTX Capital, L.P.	56,584	0.05%	$663K	-6,415 (-10.2%)
55	STATE OF WISCONSIN INVESTMENT BOARD	52,843	0.04%	$619K	-620 (-1.2%)
56	PRICE T ROWE ASSOCIATES INC /MD/	50,853	0.04%	$596K	NEW
57	VANGUARD ASSET MANAGEMENT, Ltd	41,471	0.03%	$486K	+14,615 (+54.4%)
58	Squarepoint Ops LLC	40,428	0.03%	$474K	-172,363 (-81.0%)
59	Jackson Creek Investment Advisors LLC	40,161	0.03%	$477K	NEW
60	Legal & General Group Plc	37,826	0.03%	$443K	+18,659 (+97.3%)
61	MetLife Investment Management, LLC	36,306	0.03%	$426K	NEW
62	Invesco Ltd.	33,735	0.03%	$395K	NEW
63	CITIGROUP INC	33,581	0.03%	$394K	+29,748 (+776.1%)
64	FORMULA GROWTH LTD	31,000	0.03%	$363K	NEW
65	MANUFACTURERS LIFE INSURANCE COMPANY, THE	28,594	0.02%	$335K	+18,365 (+179.5%)
66	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	28,023	0.02%	$328K	NEW
67	JONES FINANCIAL COMPANIES LLLP	25,329	0.02%	$348K	+11,211 (+79.4%)
68	NATIXIS ADVISORS, LLC	25,313	0.02%	$296K	+9,843 (+63.6%)
69	DIVERSIFIED TRUST CO	24,086	0.02%	$282K	NEW
70	Jupiter Topco LLC	23,500	0.02%	$276K	NEW
71	Yorktown Management & Research Co Inc	22,800	0.02%	$267K	NEW
72	WINTON GROUP Ltd	22,000	0.02%	$258K	+8,200 (+59.4%)
73	NEW YORK STATE COMMON RETIREMENT FUND	21,400	0.02%	$251K	NEW
74	BARCLAYS PLC	20,631	0.02%	$242K	-26,062 (-55.8%)
75	Graham Capital Management, L.P.	20,001	0.02%	$234K	+6,379 (+46.8%)
76	Police & Firemen's Retirement System of New Jersey	18,025	0.02%	$211K	NEW
77	MILLENNIUM MANAGEMENT LLC	17,491	0.01%	$205K	-107,577 (-86.0%)
78	Quadrature Capital Ltd	16,341	0.01%	$192K	-11,659 (-41.6%)
79	ARIZONA STATE RETIREMENT SYSTEM	16,108	0.01%	$189K	+5,270 (+48.6%)
80	Zurcher Kantonalbank (Zurich Cantonalbank)	13,300	0.01%	$156K	-19,000 (-58.8%)
81	KLP KAPITALFORVALTNING AS	13,200	0.01%	$155K	+4,700 (+55.3%)
82	Entropy Technologies, LP	12,954	0.01%	$152K	-4,955 (-27.7%)
83	Virtu Financial LLC	12,726	0.01%	$149K	NEW
84	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	12,633	0.01%	$148K	NEW
85	VOYA INVESTMENT MANAGEMENT LLC	12,297	0.01%	$144K	NEW
86	LOS ANGELES CAPITAL MANAGEMENT LLC	12,245	0.01%	$144K	NEW
87	SG Americas Securities, LLC	12,084	0.01%	$142K	NEW
88	Magnetar Financial LLC	11,936	0.01%	$140K	NEW
89	RAYMOND JAMES FINANCIAL INC	11,600	0.01%	$136K	NEW
90	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	11,512	0.01%	$135K	NEW
91	INTECH INVESTMENT MANAGEMENT LLC	11,390	0.01%	$133K	NEW
92	TWO SIGMA INVESTMENTS, LP	11,079	0.01%	$130K	NEW
93	State of Wyoming	10,943	0.01%	$128K	+8,868 (+427.4%)
94	Vanguard Investments Australia, Ltd.	10,677	0.01%	$125K	—
95	ROYAL BANK OF CANADA	10,214	0.01%	$120K	+2,485 (+32.2%)
96	Pictet Asset Management Holding SA	10,163	0.01%	$119K	NEW
97	PRUDENTIAL FINANCIAL INC	10,070	0.01%	$118K	NEW
98	Caitong International Asset Management Co., Ltd	6,873	0.01%	$81K	+6,730 (+4706.3%)
99	Ameritas Investment Partners, Inc.	5,547	0.00%	$65K	NEW
100	PNC Financial Services Group, Inc.	5,411	0.00%	$63K	-746 (-12.1%)
101	Russell Investments Group, Ltd.	4,889	0.00%	$57K	NEW
102	Tower Research Capital LLC (TRC)	3,400	0.00%	$40K	-7,992 (-70.2%)
103	SIMPLEX TRADING, LLC	2,654	0.00%	$31K	+2,096 (+375.6%)
104	Federation des caisses Desjardins du Quebec	750	0.00%	$9K	—
105	Parallel Advisors, LLC	666	0.00%	$8K	—
106	FIRST HORIZON CORP	513	0.00%	$6K	-164 (-24.2%)
107	Sterling Capital Management LLC	293	0.00%	$3K	NEW
108	OSAIC HOLDINGS, INC.	254	0.00%	$3K	-3,244 (-92.7%)
109	Farther Finance Advisors, LLC	170	0.00%	$2K	+46 (+37.1%)
110	GAMMA Investing LLC	160	0.00%	$2K	+91 (+131.9%)
111	Quarry LP	143	0.00%	$2K	NEW
112	NATIONAL BANK OF CANADA /FI/	140	0.00%	$2K	-4 (-2.8%)
113	ROTHSCHILD INVESTMENT LLC	50	0.00%	$586	NEW
114	EverSource Wealth Advisors, LLC	48	0.00%	$563	NEW
115	SBI Securities Co., Ltd.	1	0.00%	$12	-20 (-95.2%)
116	Rakuten Securities, Inc.	1	0.00%	$12	—

Exited since 2026-03-31 (28 filers; largest 25 shown)

BAMCO INC /NY/	−1,208,794
T. Rowe Price Investment Management, Inc.	−975,936
SEVEN GRAND MANAGERS, LLC	−200,000
Point72 Asset Management, L.P.	−166,692
Trexquant Investment LP	−149,119
Robertson Opportunity Capital, LLC	−135,012
Schonfeld Strategic Advisors LLC	−113,795
Jain Global LLC	−86,418
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	−82,680
Hudson Bay Capital Management LP	−55,276
Brevan Howard Capital Management LP	−54,416
Interval Partners, LP	−49,534
Jump Financial, LLC	−44,005
Grandeur Peak Global Advisors, LLC	−39,573
Jefferies Financial Group Inc.	−39,178
Aquatic Capital Management LLC	−37,435
Catalyst Funds Management Pty Ltd	−34,900
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	−26,768
JANUS HENDERSON GROUP PLC	−23,500
Centiva Capital, LP	−20,443
Man Group plc	−14,144
LMR Partners LLP	−11,672
Arcus Capital Partners, LLC	−10,100
WESBANCO BANK INC	−10,000
CWM, LLC	−6,666

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Glazer Capital, LLC	SCHEDULE 13G	2026-09-30	2026-09-23	5,969,101	5%
Paul J. Glazer	SCHEDULE 13G	2026-09-30	2026-09-23	5,969,101	5%
Capital World Investors	SCHEDULE 13G/A	2026-05-14	2026-03-31	5,152,741	4.4%
ACP Accelerant Holdings, L.P.	SCHEDULE 13G	2025-11-14	2025-09-30	85,976,902	42.9%
ACP Insurance Management, LLC	SCHEDULE 13G	2025-11-14	2025-09-30	90,916,741	44.2%
Lee-Smith Christopher	SCHEDULE 13G	2025-11-14	2025-09-30	20,386,940	17.4%
ONeill Francis James	SCHEDULE 13G	2025-11-14	2025-09-30	8,079,736	7%
RADKE JEFFREY L	SCHEDULE 13G	2025-11-14	2025-09-30	36,750,813	29.9%
Schwartz Keoni Andrew	SCHEDULE 13G	2025-11-14	2025-09-30	90,916,741	44.2%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.