Francis James O'Neill - 25 Jun 2026 Form 4 Insider Report for Accelerant Holdings (ARX)

Reporting relationship: Co-Founder, Chief U/W Officer
Issuer ticker: ARX
Reported as of: 25 Jun 2026
Net transaction value: -$1,928,677
SEC form: 4
Accepted by SEC: 29 Jun 2026, 21:12:45 UTC
Prior SEC filing: 24 Jun 2026
Next SEC filing: 16 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert L. Villasenor, attorney-in-fact for Francis James O'Neill

Key filing fact

Francis James O'Neill filed Form 4 for Accelerant Holdings (ARX) on 29 Jun 2026.

Key facts

This page summarizes Francis James O'Neill's Form 4 filing for Accelerant Holdings (ARX).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 29 Jun 2026, 21:12.

Change

Previous filing in this sequence was filed on 24 Jun 2026.
Current net transaction value: -$1,928,677.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002008632 Primary reporting owner

ONeill Francis James

Relationship: Co-Founder, Chief U/W Officer
Address: UNIT 106, WINDWARD 3, REGATTA OFFICE PARK, WEST BAY ROAD, GRAND CAYMAN, CAYMAN ISLANDS
Signature: /s/ Robert L. Villasenor, attorney-in-fact for Francis James O'Neill
Signature date: 29 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARX transaction

Class A Common Shares

Sale

Transaction value: $959,778
Shares: -73,500
Change %: -1%
Price: $13.06
Shares after: 6,976,625
Date: 25 Jun 2026
Ownership: By Famed Ventures Limited
Footnotes: F1, F2

ARX transaction

Class A Common Shares

Sale

Transaction value: $968,899
Shares: -73,500
Change %: -1.1%
Price: $13.18
Shares after: 6,903,125
Date: 26 Jun 2026
Ownership: By Famed Ventures Limited
Footnotes: F1, F3

ARX holding

Class A Common Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 166,644
Date: 25 Jun 2026
Ownership: Direct

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.79 to $13.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.8750 to $13.78, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.