Security Snapshot

Accelerant Holdings - Common Stock (ARX) Institutional Ownership

CUSIP: G00894108

13F Institutional Holders and Ownership History from Q3 2025 to Q3 2026

13F reference period

Q3 2026

Institutions Reporting

65

Shares (Excl. Options)

27.16MFull value: 27,159,750 · shares · 30 Sep 2026

Price

$19.73

The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.

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Security type / class
Equity / Common Stock
Symbol
ARX on NYSE
All holders as of 30 Sep 2026
Q3 2026
Total 13F shares
27,159,750
Latest holder snapshot 5 signals
Total 13F value
$535,859,729
Portfolio coverage rank
0.01%
Share change
-488,303
Value change
+$110,465,852
Number of holders
65
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
119,382,020
SEC-reported price per share
$19.75
Insider filing price
$19.75
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source

Key facts

  • ARX - Accelerant Holdings - Common Stock is tracked under CUSIP G00894108.
  • 65 institutions reported positions in Q3 2026.
  • 6 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 116 to 65 between Q2 2026 and Q3 2026.
  • SEC-reported value moved from
    $761.1MFull value: $761,103,177 · USD · 30 Jun 2026
    to
    $535.86MFull value: $535,859,729 · USD · 30 Sep 2026
    .

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 65 institutions filings for Q3 2026.

Open SEC evidence

Security key

G00894108

13F reference period

Q3 2026

13F holders

65

13D/G owners

6

CIK / CUSIP context first

Open Q3 2026 holders ARX full holder history Accelerant Holdings SEC filings Accelerant Holdings company facts Accelerant Holdings insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
6
Security
ARX
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
ACP Accelerant Holdings, L.P. 44% $1,353,750,273 90,916,741 ACP Insurance Management, LLC 30 Sep 2025
RADKE JEFFREY L 30% $547,219,606 36,750,813 RADKE JEFFREY L 30 Sep 2025
Lee-Smith Christopher 17% $303,561,537 20,386,940 Lee-Smith Christopher 30 Sep 2025
ONeill Francis James 7% $120,307,269 8,079,736 ONeill Francis James 30 Sep 2025
GLAZER CAPITAL, LLC 5% $118,426,964 5,969,101 Glazer Capital, LLC 23 Sep 2026
Capital World Investors 5.1% $85,665,892 5,753,250 Capital World Investors 30 Sep 2025
As of 30 Sep 2026, 65 institutional investors reported holding
27.16MFull value: 27,159,750 · shares · 30 Sep 2026
shares of Accelerant Holdings - Common Stock (ARX). This represents 23% of the company’s total
119.38MFull value: 119,382,020 · shares · Stored outstanding share count
outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
22%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Deer Park Road Corp 3.8% 4,594,265 83% $90,644,848
BARINGS LLC 2.6% 3,128,867 0% 1.1% $61,732,546
VANGUARD PORTFOLIO MANAGEMENT LLC 2.2% 2,645,829 +9.4% 0% $52,202,206
Qube Research & Technologies Ltd 1.9% 2,227,552 +831% 0.04% $43,949,601
VANGUARD CAPITAL MANAGEMENT LLC 1.7% 1,971,397 +19% 0% $38,895,663
FIL Ltd 1.4% 1,668,348 0.02% $32,916,506
Owls Nest Partners IA, LLC 1.4% 1,625,904 +30% 12% $32,079,086
WATER ISLAND CAPITAL LLC 0.89% 1,067,000 2.2% $21,051,910
STATE STREET CORP 0.87% 1,042,714 +16% 0% $20,572,747
GEODE CAPITAL MANAGEMENT, LLC 0.67% 794,805 -1.8% 0% $15,679,319
Westchester Capital Management, LLC 0.63% 754,713 0.7% $14,890,487
GABELLI FUNDS LLC 0.53% 629,462 0.08% $12,419,285
PICTON MAHONEY ASSET MANAGEMENT 0.5% 600,000 0.1% $11,838,005
RENAISSANCE TECHNOLOGIES LLC 0.45% 531,900 +80% 0.01% $10,494,387
Verition Fund Management LLC 0.44% 528,997 0.08% $10,437,111
GABELLI & Co INVESTMENT ADVISERS, INC. 0.39% 463,855 1.4% $9,151,859
Alberta Investment Management Corp 0.29% 350,000 0.04% $6,905,500
MORGAN STANLEY 0.22% 266,960 -4.6% 0% $5,267,121
Maven Securities LTD 0.22% 260,100 0.32% $5,131,773
NATIXIS 0.21% 253,000 0.02% $4,991,690
TOKIO MARINE ASSET MANAGEMENT CO LTD 0.2% 244,000 0.14% $4,814,120
Crestwood Advisors Group, LLC 0.16% 190,408 0.06% $3,756,750
Jump Financial, LLC 0.12% 142,527 0.02% $2,812,057
Swiss National Bank 0.1% 114,100 -2.6% 0% $2,251,193
VANGUARD FIDUCIARY TRUST CO 0.08% 99,015 +7.2% 0% $1,953,566

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
5
Headline period
Q3 2026
Rows shown
1-5 of 5
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q3 27,159,750 $535,859,729 +$110,465,852 $19.73 65
2026 Q2 64,484,068 $761,103,177 +$95,822,118 $11.72 116
2026 Q1 55,573,389 $754,983,423 +$27,032,730 $13.36 107
2025 Q4 50,070,804 $809,429,011 +$15,544,979 $16.35 98
2025 Q3 49,247,099 $727,965,934 +$727,961,555 $14.89 88
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