Insider Transactions Reported by 15 Insiders of Accelerant Holdings

Symbol: ARX on NYSE
Location: Grand Cayman, Cayman Islands

Quick Takeaways

ARX - Accelerant Holdings has 15 insiders with reported activity on this page.
Net insider value flow over the last year: +$1,248,551.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $1,886,836; sell value: $638,285.
Net share flow: +90,552.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

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

Buys

$1,886,836

Shares: 140,552

Insiders: 6

Sells

$638,285

Shares: 50,000

Insiders: 1

Net

+$1,248,551

Shares: +90,552

Insiders: 5

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	50,000	$0	$638,285	-$638,285
3-6	140,552	0	$1,886,836	$0	+$1,886,836
6-9	0	0	$0	$0	$0
9-12	0	0	$0	$0	$0

Accelerant Holdings executives and other stock owners filed with the SEC include:

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
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	$3,626,738	+$74,696	+2.1%	Mixed	18 Mar 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
Karen Sue Meriwether	Director	$143,056	+$7,951	+5.9%	Filing P/S	08 Dec 2025
Samuel Gaynor	Director	$100,773	+$100,774	+100%	Filing P/S	19 Nov 2025
Nancy Hasley	General Counsel, Director	$0			Mixed	25 Jul 2025
Keoni Andrew Schwartz	Director, 10%+ Owner	$0			Mixed	25 Jul 2025
Michael Kenneth Searles	Director				Mixed	23 Jul 2025
Wendy Liisa Harrington	Director				Mixed	25 Jul 2025
Paul Christopher Little	Director				Mixed	25 Jul 2025
Kunal Arora	Director				Mixed	23 Jul 2025

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

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
ACP Accelerant Holdings, L.P.	13D/G	ACP Insurance Management, LLC	44%	90,916,741	$1,353,750,273	$0	30 Sep 2025	13D/G
Jeffrey L. Radke	13D/G 3/4/5	RADKE JEFFREY L · Co-Founder, CEO, Director, 10%+ Owner	30%	36,750,813	$547,219,606	$0	30 Sep 2025	13D/G 3/4/5
Lee-Smith Christopher	13D/G 3/4/5	Co-Founder, Head of Distrib., Director	17%	20,386,940	$303,561,537	$0	30 Sep 2025	13D/G 3/4/5
ONeill Francis James	13D/G 3/4/5	Co-Founder, Chief U/W Officer	7%	8,079,736	$120,307,269	$0	30 Sep 2025	13D/G 3/4/5
SECURITY BENEFIT LIFE INSURANCE CO /KS/	13F	Company	2.9%	5,866,257	$95,913,302	—	31 Dec 2025	13F
Capital World Investors	13F 13D/G	Company	5.1% from 13D/G	5,767,631	$94,300,767	—	31 Dec 2025	13F 13D/G
GILDER GAGNON HOWE & CO LLC	13F	Company	1.8%	3,703,078	$60,545,325	—	31 Dec 2025	13F
Keenan Capital, LLC	13F	Company	1.5%	3,139,980	$51,338,673	—	31 Dec 2025	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	1.4%	2,846,468	$46,539,752	—	31 Dec 2025	13F
BALYASNY ASSET MANAGEMENT L.P.	13F	Company	1.3%	2,733,595	$44,694,278	—	31 Dec 2025	13F
BARINGS LLC	13F	Company	1.5%	3,128,867	$41,926,818	—	31 Dec 2025	13F
Azora Capital LP	13F	Company	1.2%	2,439,094	$39,879,187	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	1.1%	2,235,136	$36,544,474	—	31 Dec 2025	13F
JPMORGAN CHASE & CO	13F	Company	0.95%	1,952,996	$31,931,485	—	31 Dec 2025	13F
FMR LLC	13F	Company	0.87%	1,788,135	$29,236,007	—	31 Dec 2025	13F
ArrowMark Colorado Holdings LLC	13F	Company	0.8%	1,644,013	$26,879,613	—	31 Dec 2025	13F
Grandeur Peak Global Advisors, LLC	13F	Company	0.79%	1,621,022	$26,503,710	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.74%	1,528,451	$24,990,174	—	31 Dec 2025	13F
BAMCO INC /NY/	13F	Company	0.59%	1,209,114	$19,769,014	—	31 Dec 2025	13F
T. Rowe Price Investment Management, Inc.	13F	Company	0.47%	976,086	$15,960,000	—	31 Dec 2025	13F
Jay Michael Green	3/4/5	Chief Financial Officer	0.57%	1,175,589	$15,007,216	-$638,285	23 Mar 2026	3/4/5
CITADEL ADVISORS LLC	13F	Company	0.35%	715,452	$11,697,640	—	31 Dec 2025	13F
NORGES BANK	13F	Company	0.32%	665,076	$10,873,993	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.26%	535,637	$8,757,665	—	31 Dec 2025	13F
FRED ALGER MANAGEMENT, LLC	13F	Company	0.21%	439,698	$7,189,063	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	0.17%	348,147	$5,692,204	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.16%	335,739	$5,489,333	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.15%	302,626	$4,947,935	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	0.12%	247,656	$4,049,176	—	31 Dec 2025	13F
Matthew David Sternberg	3/4/5	COO, Risk Exchange	0.16%	338,631	$3,626,738	+$74,696	18 Mar 2026	3/4/5
Linda Huber	3/4/5	Chief Financial Officer	0.1%	214,408	$3,505,570	—	31 Mar 2026	3/4/5
SEVEN GRAND MANAGERS, LLC	13F	Company	0.1%	200,000	$3,270,000	—	31 Dec 2025	13F
Squarepoint Ops LLC	13F	Company	0.1%	199,070	$3,254,795	—	31 Dec 2025	13F
Lighthouse Investment Partners, LLC	13F	Company	0.1%	198,850	$3,251,198	—	31 Dec 2025	13F
Woodline Partners LP	13F	Company	0.1%	197,312	$3,226,051	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.09%	181,647	$2,969,928	—	31 Dec 2025	13F
TEACHER RETIREMENT SYSTEM OF TEXAS	13F	Company	0.09%	176,043	$2,878,303	—	31 Dec 2025	13F
Counterpoint Mutual Funds LLC	13F	Company	0.09%	175,967	$2,877,060	—	31 Dec 2025	13F
Lykos Global Management, LP	13F	Company	0.09%	175,000	$2,861,250	—	31 Dec 2025	13F
Interval Partners, LP	13F	Company	0.08%	169,348	$2,768,840	—	31 Dec 2025	13F
Neuberger Berman Group LLC	13F	Company	0.08%	160,047	$2,616,768	—	31 Dec 2025	13F
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	13F	Company	0.07%	150,000	$2,452,500	—	31 Dec 2025	13F
Centiva Capital, LP	13F	Company	0.06%	127,605	$2,086,342	—	31 Dec 2025	13F
Walleye Capital LLC	13F	Company	0.06%	125,880	$2,058,138	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.05%	108,230	$1,769,561	—	31 Dec 2025	13F
XTX Topco Ltd	13F	Company	0.05%	106,248	$1,737,155	—	31 Dec 2025	13F
Burkehill Global Management, LP	13F	Company	0.05%	100,000	$1,635,000	—	31 Dec 2025	13F
Ghisallo Capital Management LLC	13F	Company	0.05%	100,000	$1,635,000	—	31 Dec 2025	13F
G2 Investment Partners Management LLC	13F	Company	0.05%	93,341	$1,526,125	—	31 Dec 2025	13F
Clifford R. Jenks	3/4/5	General Counsel	0.04%	85,763	$1,402,225	—	31 Mar 2026	3/4/5

Recent Insider Transactions by Companies or Individuals for Accelerant Holdings

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

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
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
Wendy Liisa Harrington	ARX	Class A Common Shares	Award				9,210	9,210	25 Jul 2025	Direct
Wendy Liisa Harrington	ARX	Convertible Preference Shares	Conversion of derivative security	-100%			-6,297	0	25 Jul 2025	Direct
Wendy Liisa Harrington	ARX	LP Interests of Accelerant Holdings LP	Conversion of derivative security	-100%			-10,882,806	0	25 Jul 2025	Direct
Jay Michael Green	ARX	Class A Common Shares	Award				1,454,851	1,454,851	25 Jul 2025	Direct
Jay Michael Green	ARX	Stock Option (Right to Buy)	Other	-100%			-1,087,948	0	25 Jul 2025	Direct
Jeffrey L. Radke	ARX	Stock Option (Right to Buy)	Award				8,279,552	8,279,552	23 Jul 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.