Accelerant Holdings (ARX)
NYSE: ARX · Insurance Agents, Brokers & Service · Grand Cayman, KY · filing with the SEC since 2023
Who owns Accelerant Holdings
As filed with the SECHolders of 5% or more
5
ACP Insurance Management, LLC holds 44.2% of Class A common shares, $0.0000011951862 par value per share, as its SCHEDULE 13G filed Nov 14, 2025 says.
Directors and officers
17
report now, of 17 people on the record since 2025. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
ACP Insurance Management, LLC
SCHEDULE 13G · filed Nov 14, 2025 · Class A common shares, $0.0000011951862 par value per share
Radke Jeffrey L
SCHEDULE 13G · filed Nov 14, 2025 · Class A common shares, $0.0000011951862 par value per share
Lee-Smith Christopher
SCHEDULE 13G · filed Nov 14, 2025 · Class A common shares, $0.0000011951862 par value per share
ONeill Francis James
SCHEDULE 13G · filed Nov 14, 2025 · Class A common shares, $0.0000011951862 par value per share
Glazer Capital, LLC
SCHEDULE 13G · filed Sep 30, 2026 · Common Stock
Capital World Investors
SCHEDULE 13G/A · filed May 14, 2026 · Common Stock · reported falling below 5%, from 5.1% in Nov 13, 2025
What ARX reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Altamont Capital Partners
An entity · legal entity · owns, named in the 10-K filed Mar 18, 2026
Ayax Acquisition Co. Ltd
An entity · legal entity · owns, named in the 10-K filed Mar 18, 2026
Managing General Agents
An investee · investee · invested in, named in the 10-K filed Mar 18, 2026
Ayax Specialty, S.L
A company bought · acquisition · Nov 2024 · owns, named in the 10-K filed Mar 18, 2026
Capital Markets Underwriting Limited, Omega Insurance Holdings, Inc, American Eagle Underwriting Managers, LLC
A company bought · acquisition · owns, named in the 10-K filed Mar 18, 2026
Corniche Underwriting Ltd.
A company bought · acquisition · owns, named in the 10-K filed Mar 18, 2026
Mission Underwriting Holdings LLC
A company bought · acquisition · owns, named in the 10-K filed Mar 18, 2026
112 subsidiaries in 11 countries, from the list filed with the 10-K filed Mar 18, 2026.
Insider tradesForm 4
25sales
6purchases
24sales on a scheduled plan
6people selling
$21.6Msold, in dollars
$1.9Mbought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 19 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Oneill Francis James | Co-Founder, Chief U/W Officer | 10 | $11.0M | 10 | 1 | $500,000 |
| Radke Jeffrey L | Co-Founder, CEO | 10 | $8.8M | 10 | 1 | $1.0M |
| Hasley Nancy | General Counsel | 2 | $900,000 | 2 | 0 | $0 |
| Green Jay Michael | Chief Financial Officer | 1 | $600,000 | 1 | 0 | $0 |
| Sternberg Matthew David | COO, Risk Exchange | 1 | $300,000 | 1 | 1 | $100,000 |
| Lee-Smith Christopher | Co-Founder, Head of Distrib. | 0 | $0 | 0 | 1 | $200,000 |
| Meriwether Karen Sue | director | 1 | $0 | 0 | 1 | $0 |
| Gaynor Samuel | director | 0 | $0 | 0 | 1 | $100,000 |