Accelerant Holdings ARX Insider Ownership

NYSE ARX

$19.75 -0.08 (-0.40%)

As of: Oct 20, 2026 · 3:59 PM EDT

Insider Holdings by Owner

58.28Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

27.26%

▼-0.497% pp QoQ

Shares Held by Insiders

59.54Mn

filed for Sep 2026

▼-1.79% QoQ

Shares Outstanding

218.41Mn

218,412,430 shares

Direct Holdings

21.52Mn

Indirect: 38.03Mn

Net Shares Traded (QoQ)

-1.09Mn

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past 12 months, Accelerant Holdings insiders bought $1.89 million of stock on the open market (140.55K shares) and sold $21.58 million (1.62Mn shares).

Behind Accelerant Holdings' open-market trades in the past 12 months were 6 insiders buying and 6 insiders selling.
Among Accelerant Holdings' insiders, the largest open-market purchases in the past 12 months were by Jeffrey L. Radke (Co-Founder, CEO), totaling $999,366 (74.11K shares), most recently on November 14, 2025.
On the selling side, Francis James Oneill (Co-Founder, Chief U/W Officer) was the top open-market seller of Accelerant Holdings over the past 12 months, with $11 million sold (827.84K shares) and the latest sale on August 11, 2026.
The latest open-market trade on record is a sale of 542 shares for $10,631 by Karen Sue Meriwether (Director) on August 21, 2026.
Apart from open-market trades, ARX insiders received 923.78K shares in stock awards and gave up 233.17K shares to cover taxes or exercise prices in the past 12 months.
Business Quant data puts insider holdings in ARX at 59.54Mn shares across insiders' latest Form 4 filings, or 27.26% of the 218.41Mn shares outstanding; that total is down 1.79% from 60.63Mn shares at the end of Q2 2026 and down 0.32% from 59.73Mn shares at the end of Q3 2025.
By type of ownership, ARX insiders hold 36.14% of their shares directly (21.52Mn shares) and 63.86% indirectly (38.03Mn shares).
The insider holdings in Accelerant Holdings belong to 13 insiders who have reported on Form 4 within the past two years.
ARX's largest insider holders by reported holdings are Jeffrey L. Radke (Co-Founder, CEO, 28.18Mn shares), Christopher Lee-Smith (Co-Founder, Head of Distrib., 17.78Mn shares) and Francis James Oneill (Co-Founder, Chief U/W Officer, 6.54Mn shares).
The holding of Jeffrey L. Radke makes up 47.32% of all shares held by Accelerant Holdings insiders.
Institutional investors owned 54.52% of ARX shares as of Q2 2026, per their 13F filings.
Over the trailing 12 months, 11 insiders reported transactions in ARX stock across 36 Form 4 filings.
The insider holdings and trades above for Accelerant Holdings reflect Form 4 filings through August 25, 2026.

Form 4 Holdings

Insiders Holding ARX

Insiders 13

Shares held 58.28Mn

Of outstanding 26.68%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Jeffrey L Radke	Co Founder, Ceo	0	27,591,939	27,591,939	47.3%	11 Aug, 2026
2	Christopher Lee-Smith	Co Founder, Head Of Distrib.	17,784,023	0	17,784,023	30.5%	20 Mar, 2026
3	Francis James Oneill	Co Founder, Chief U/W Officer	0	6,369,290	6,369,290	10.9%	12 Aug, 2026
4	Keoni Andrew Schwartz	Director, TenPercentOwner	0	3,302,263	3,302,263	5.7%	29 Jul, 2025
5	Nancy Hasley	General Counsel	1,341,834	0	1,341,834	2.3%	14 Aug, 2026
6	Jay Michael Green	Chief Financial Officer	1,175,589	0	1,175,589	2.0%	24 Mar, 2026
7	Matthew David Sternberg	Coo, Risk Exchange	596,482	0	596,482	1.0%	27 Jul, 2026
8	David George Paul Talach	Director	23,316	0	23,316	0.0%	15 May, 2026
9	Simon Wainwright	Director	23,316	0	23,316	0.0%	15 May, 2026
10	Wendy Liisa Harrington	Director	23,315	0	23,315	0.0%	29 Jul, 2025
11	Paul Christopher Little	Director	20,868	0	20,868	0.0%	15 May, 2026
12	Karen Sue Meriwether	Director	20,868	0	20,868	0.0%	25 Aug, 2026
13	Samuel Gaynor	Director	7,500	0	7,500	0.0%	20 Nov, 2025

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

101 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
21 Aug, 2026	Karen Sue Meriwether	Director	Disposed S	542	$19.62	$10.63K	20,868	Direct
13 Aug, 2026	Nancy Hasley	Director	Disposed S	20,489	$19.56	$400.84K	1,341,834	Direct
10 Aug, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	63,616	$12.07	$767.67K	6,458,509	Indirect
11 Aug, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	89,219	$12.41	$1.11Mn	6,369,290	Indirect
10 Aug, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$12.09	$967.10K	27,591,939	Indirect
03 Aug, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$12.06	$964.53K	27,671,939	Indirect
27 Jul, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	110,467	$14.63	$1.62Mn	6,626,772	Indirect
28 Jul, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	104,647	$14.56	$1.52Mn	6,522,125	Indirect
27 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$14.63	$1.17Mn	27,767,162	Indirect
27 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	15,223	$14.45	$220.01K	27,751,939	Indirect
23 Jul, 2026	Matthew David Sternberg	Coo, Risk Exchange	Disposed F	3,910	$13.77	$53.84K	614,050	Direct
27 Jul, 2026	Matthew David Sternberg	Coo, Risk Exchange	Disposed S	17,568	$14.64	$257.21K	596,482	Direct
17 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	14,777	$14.30	$211.28K	27,927,162	Indirect
20 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$13.51	$1.08Mn	27,847,162	Indirect
14 Jul, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	83,119	$12.84	$1.07Mn	6,820,006	Indirect
15 Jul, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	82,767	$12.71	$1.05Mn	6,737,239	Indirect
13 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$13.18	$1.05Mn	27,941,939	Indirect
06 Jul, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$13.33	$1.07Mn	28,021,939	Indirect
29 Jun, 2026	Jeffrey L Radke	Co Founder, Ceo	Disposed S	80,000	$12.87	$1.03Mn	28,101,939	Indirect
25 Jun, 2026	Francis James Oneill	Co Founder, Chief U/W Officer	Disposed S	73,500	$13.06	$959.78K	6,976,625	Indirect

Showing 1 to 20 of 101 transactions