SEC ownership of Accelerant Holdings

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001997350.

Comparable stake leader

ACP Accelerant Holdings, L.P.

Disclosed value leader

ACP Accelerant Holdings, L.P.

Comparable rows

50/50

Latest evidence

13 May 2026

Top shareholders Insider holders Latest transactions
Public ticker
ARX on NYSE
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
ACP Accelerant Holdings, L.P.
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
ACP Accelerant Holdings, L.P.
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
13 May 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001997350
Issuer location
Grand Cayman, Cayman Islands

Ownership snapshot

Top shareholders of Accelerant Holdings (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
ACP Accelerant Holdings, ...
Disclosed value leader
ACP Accelerant Holdings, ...
Comparable rows
50/50
Latest evidence
13 May 2026
13D/G 3/4/5 13F Lead comparable stake: 44% 13D/G row: ACP Accelerant Holdings, L.P. Showing 1-8 of 50 holder rows.

Quick read

ACP Accelerant Holdings, L.P. leads the comparable SEC ownership view at 44%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens ACP Accelerant Holdings, L.P.'s linked filing trail.
Comparable ownership Top 5
ACP Accelerant Holdings, L.P. 44%
Jeffrey L. Radke 30%
Lee-Smith Christopher 17%
ONeill Francis James 7%
Capital World Investors 5.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
ACP Accelerant Holdings, L.P.
13D/G
ACP Insurance Management, LLC
13D/G
44%
$1,353,750,273
90,916,741 shares
 $0 30 Sep 2025
Jeffrey L. Radke
13D/G 3/4/5
RADKE JEFFREY L · Co-Founder, CEO, Director, 10%+ Owner
13D/G 3/4/5
30%
$547,219,606
36,750,813 shares
 $0 30 Sep 2025
Lee-Smith Christopher
13D/G 3/4/5
Co-Founder, Head of Distrib., Director
13D/G 3/4/5
17%
$303,561,537
20,386,940 shares
 $0 30 Sep 2025
ONeill Francis James
13D/G 3/4/5
Co-Founder, Chief U/W Officer
13D/G 3/4/5
7%
$120,307,269
8,079,736 shares
 $0 30 Sep 2025
Capital World Investors
13D/G 13F
Company
13D/G 13F
5.1%
$85,665,892
5,753,250 shares
 $0 30 Sep 2025
Nancy Hasley
3/4/5
Director
3/4/5
0.93%
$25,522,329
1,910,354 shares
 — 13 May 2026
Jay Michael Green
3/4/5
Chief Financial Officer
3/4/5
0.57%
$15,007,216
1,175,589 shares
 -$638,285 23 Mar 2026
Matthew David Sternberg
3/4/5
COO, Risk Exchange
3/4/5
0.3%
$8,255,945
617,960 shares
 +$74,696 13 May 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to buying over the last 12 months. Net value: +$1,248,551.

Buys
$1,886,836
Insiders: 6
Sells
$638,285
Insiders: 1
Net
+$1,248,551
Shares: +90,552
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 140,552 Shares: 50,000
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 50,000 $0 $638,285 -$638,285
3-6 0 0 $0 $0 $0
6-9 140,552 0 $1,886,836 $0 +$1,886,836
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-17 of 17 reporting-owner rows connected to Accelerant Holdings. Open a relationship link for the CIK-to-CIK filing trail.

Rows
17
Largest Forms 3/4/5 holder
Jeffrey L. Radke
Net 12M change
+$1,248,552
Latest report
13 May 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Jeffrey L. Radke Co-Founder, CEO, Director, 10%+ Owner $308,935,753 +$999,366 +0.32% Mixed 18 Mar 2026
Lee-Smith Christopher Co-Founder, Head of Distrib., Director $190,466,886 +$197,240 +0.1% Mixed 18 Mar 2026
ONeill Francis James Co-Founder, Chief U/W Officer $78,865,965 +$506,810 +0.65% Mixed 18 Mar 2026
Nancy Hasley Director $25,522,329 Median 13 May 2026
Jay Michael Green Chief Financial Officer $15,007,216 -$638,285 -4.1% Filing P/S 23 Mar 2026
Matthew David Sternberg COO, Risk Exchange $8,255,945 +$74,696 +0.91% Median 13 May 2026
Linda Huber Chief Financial Officer $3,505,570 Mixed 31 Mar 2026
Clifford R. Jenks General Counsel $1,402,225 Mixed 31 Mar 2026
David George Paul Talach Director $311,501 Median 13 May 2026
Simon Wainwright Director $311,501 Median 13 May 2026
Karen Sue Meriwether Director $286,037 +$7,951 +2.9% Median 13 May 2026
Paul Christopher Little Director $278,796 Median 13 May 2026
Samuel Gaynor Director $100,773 +$100,774 +100% Filing P/S 19 Nov 2025
Keoni Andrew Schwartz Director, 10%+ Owner $0 Mixed 25 Jul 2025
Kunal Arora Director Mixed 23 Jul 2025
Michael Kenneth Searles Director Mixed 23 Jul 2025
Wendy Liisa Harrington Director Mixed 25 Jul 2025

Recent insider transactions for Accelerant Holdings

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Matthew David Sternberg ARX Class A Common Shares Award 82.5% 279,329 617,960 13 May 2026 Direct
Simon Wainwright ARX Class A Common Shares Award 23,316 23,316 13 May 2026 Direct
David George Paul Talach ARX Class A Common Shares Award 23,316 23,316 13 May 2026 Direct
Karen Sue Meriwether ARX Class A Common Shares Award 119.5% 11,658 21,410 13 May 2026 Direct
Nancy Hasley ARX Class A Common Shares Award 0.84% 11,658 1,397,323 13 May 2026 Direct
Paul Christopher Little ARX Class A Common Shares Award 126.6% 11,658 20,868 13 May 2026 Direct
Jay Michael Green ARX Class A Common Shares Sale -4.08% $638,285 $12.77 -50,000 1,175,589 23 Mar 2026 Direct
Jeffrey L. Radke ARX Class A Common Shares Award 896.5% 300,171 333,652 18 Mar 2026 Direct
Francis James ONeill ARX Class A Common Shares Award 1.78% 128,644 7,363,769 18 Mar 2026 Direct
Christopher Lee-Smith ARX Class A Common Shares Award 0.73% 128,644 17,784,023 18 Mar 2026 Direct
Matthew David Sternberg ARX Class A Common Shares Award 114.4% 180,667 338,631 18 Mar 2026 Direct
Jay Michael Green ARX Class A Common Shares Tax liability -2.28% -28,625 1,225,589 17 Mar 2026 Direct
Jay Michael Green ARX Class A Common Shares Tax liability -13.8% -200,637 1,254,214 02 Feb 2026 Direct
Karen Sue Meriwether ARX Class A Common Shares Purchase 5.88% $7,951 $14.67 542 9,752 08 Dec 2025 Direct
Christopher Lee-Smith ARX Class A Common Shares Purchase 0.08% $197,240 $13.42 14,700 17,655,379 19 Nov 2025 Direct
Samuel Gaynor ARX Class A Common Shares Purchase $100,774 $13.44 7,500 7,500 19 Nov 2025 Direct
Francis James ONeill ARX Class A Common Shares Purchase 0.53% $506,810 $13.34 38,000 7,235,125 18 Nov 2025 Direct
Matthew David Sternberg ARX Class A Common Shares Purchase 3.74% $74,696 $13.10 5,700 157,964 17 Nov 2025 Direct
Jeffrey L. Radke ARX Class A Common Shares Purchase 0.26% $999,366 $13.48 74,110 28,261,939 14 Nov 2025 By LLC
Matthew David Sternberg ARX Class A Common Shares Award 152,264 152,264 25 Jul 2025 Direct
Keoni Andrew Schwartz ARX Class A Common Shares Sale -100% -11,596,152 0 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX Class A Common Shares Conversion of derivative security 11,596,152 8,111,253 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX Redeemable Preference Shares Other -100% -909,791 0 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX Convertible Preference Shares Conversion of derivative security -100% -9,056,545 0 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX Class B Common Shares Conversion of derivative security -100% -11,596,152 0 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX Class B Common Shares Conversion of derivative security 101,923,596 90,196,595 25 Jul 2025 See Footnote
Keoni Andrew Schwartz ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -8,491,134,179 0 25 Jul 2025 See Footnote
Jeffrey L. Radke ARX Class A Common Shares Conversion of derivative security 249,828 249,828 25 Jul 2025 By Trust
Jeffrey L. Radke ARX Class A Common Shares Conversion of derivative security 27,945,395 27,945,395 25 Jul 2025 By LLC
Jeffrey L. Radke ARX Class A Common Shares Conversion of derivative security 33,464 33,464 25 Jul 2025 Direct
Jeffrey L. Radke ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -24,372 0 25 Jul 2025 By Trust
Jeffrey L. Radke ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -204,207,109 0 25 Jul 2025 By LLC
Jeffrey L. Radke ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -3,265 0 25 Jul 2025 Direct
Francis James ONeill ARX Class A Common Shares Conversion of derivative security 7,144,680 7,144,680 25 Jul 2025 Direct
Francis James ONeill ARX Redeemable Preference Shares Disposed to Issuer -100% -22,190 0 25 Jul 2025 Direct
Francis James ONeill ARX Convertible Preference Shares Conversion of derivative security -100% -7,975 0 25 Jul 2025 Direct
Francis James ONeill ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -163,616,981 0 25 Jul 2025 Direct
Karen Sue Meriwether ARX Class A Common Shares Award 9,210 9,210 25 Jul 2025 Direct
Paul Christopher Little ARX Class A Common Shares Award 9,210 9,210 25 Jul 2025 Direct
Christopher Lee-Smith ARX Class A Common Shares Conversion of derivative security 17,509,884 17,509,884 25 Jul 2025 Direct
Christopher Lee-Smith ARX Redeemable Preference Shares Disposed to Issuer -100% -62,132 0 25 Jul 2025 Direct
Christopher Lee-Smith ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -107,086,944 0 25 Jul 2025 Direct
Nancy Hasley ARX Class A Common Shares Purchase 500 500 25 Jul 2025 By Spouse
Nancy Hasley ARX Class A Common Shares Conversion of derivative security 512,531 512,531 25 Jul 2025 By Trust
Nancy Hasley ARX Class A Common Shares Conversion of derivative security 1,385,665 1,385,665 25 Jul 2025 Direct
Nancy Hasley ARX Redeemable Preference Shares Disposed to Issuer -100% -22,190 0 25 Jul 2025 Direct
Nancy Hasley ARX Convertible Preference Shares Conversion of derivative security -100% -17,025 0 25 Jul 2025 Direct
Nancy Hasley ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -50,000 0 25 Jul 2025 By Trust
Nancy Hasley ARX LP Interests of Accelerant Holdings LP Conversion of derivative security -100% -34,242,081 0 25 Jul 2025 Direct
Wendy Liisa Harrington ARX Class A Common Shares Conversion of derivative security 153.2% 14,105 23,315 25 Jul 2025 Direct
* marks a reported price that did not pass the local price check.
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