Accelerant co-founder sells 147K shares in plan

Accelerant Holdings co-founder and Chief Underwriting Officer Francis James O’Neill reported indirect open-market sales of Class A Common Shares through Famed Ventures Limited, an entity he solely owns and directs.

Rhea-AI Filing Summary

Accelerant Holdings co-founder and Chief Underwriting Officer Francis James O’Neill reported indirect open-market sales of Class A Common Shares through Famed Ventures Limited, an entity he solely owns and directs. Famed Ventures sold 70,536 shares at a weighted average price of $13.2072 and 76,464 shares at a weighted average price of $13.1098, totaling 147,000 shares sold. These transactions were executed under a Rule 10b5-1 trading plan adopted on March 23, 2026. After the sales, indirect holdings through Famed Ventures were 7,050,125 shares, and direct holdings were 166,644 shares.

Insider Trade Summary 10b5-1

Net Seller: 147,000 shares

Net Sell 3 txns

Insider ONeill Francis James

Role Co-Founder, Chief U/W Officer

Sold 147,000 shs ($1.93M)

Type	Security	Shares	Price	Value
Sale	Class A Common Shares	76,464	$13.1098	$1.00M
Sale	Class A Common Shares	70,536	$13.2072	$932K
holding	Class A Common Shares	--	--	--

Holdings After Transaction: Class A Common Shares — 7,050,125 shares (Indirect, By Famed Ventures Limited); Class A Common Shares — 166,644 shares (Direct)

Footnotes (4)

1. 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.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.89 to $13.6150, 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.
3. F3. These securities are held directly by Famed Ventures Limited. The Reporting Person is the sole director and owner of Famed Ventures Limited.
4. F4. 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 $13.30, 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.

Key Figures

Shares sold 2026-06-23: 76,464 shares at $13.1098 Shares sold 2026-06-22: 70,536 shares at $13.2072 Total shares sold: 147,000 shares +2 more

5 metrics

Shares sold 2026-06-23 76,464 shares at $13.1098 Open-market sale of Class A Common Shares

Shares sold 2026-06-22 70,536 shares at $13.2072 Open-market sale of Class A Common Shares

Total shares sold 147,000 shares Net open-market sales in this Form 4

Indirect holdings after trades 7,050,125 shares Class A Common Shares via Famed Ventures Limited

Direct holdings after trades 166,644 shares Class A Common Shares held directly

Key Terms

Rule 10b5-1 trading plan, weighted average price, Class A Common Shares, open-market sale, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"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."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Class A Common Shares financial

"security_title": "Class A Common Shares""

A Class A common share is a specific type of ordinary company share that represents an ownership stake and usually carries particular voting rights or payout priorities compared with other share classes. For investors it matters because those differences affect how much influence you have over company decisions, how dividends or liquidation proceeds might be distributed, and how easily the shares trade — like choosing between car models where one has extra features (more control) and another focuses on price or availability (liquidity).

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

indirect ownership financial

"ownership_type": "indirect""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider activity did Accelerant Holdings (ARX) disclose in this Form 4?

Accelerant Holdings reported indirect insider share sales totaling 147,000 shares. An entity controlled by co-founder Francis James O’Neill sold Class A Common Shares in open-market transactions, while he retained both substantial indirect holdings through the entity and a separate direct position.

Who executed the share sales reported for Accelerant Holdings (ARX)?

The sales were executed by Famed Ventures Limited, an entity owned by Francis James O’Neill. O’Neill, Accelerant’s Co-Founder and Chief Underwriting Officer, is the sole director and owner of Famed Ventures, which holds the reported Class A Common Shares.

How many Accelerant Holdings (ARX) shares were sold and at what prices?

A total of 147,000 Class A Common Shares were sold in two transactions. Famed Ventures sold 70,536 shares at a weighted average price of $13.2072 and 76,464 shares at a weighted average price of $13.1098, across multiple trades within stated price ranges.

Were the Accelerant Holdings (ARX) insider sales pre-planned under Rule 10b5-1?

Yes, the reported sales were made under a Rule 10b5-1 trading plan. The footnotes state that the transactions were effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 23, 2026, indicating they were scheduled in advance.

What are Francis James O’Neill’s remaining Accelerant Holdings (ARX) shareholdings?

After these transactions, indirect holdings were 7,050,125 shares and direct holdings were 166,644 shares. The indirect position is held through Famed Ventures Limited, while the direct position reflects shares held in O’Neill’s own name.

What type of security was involved in the Accelerant Holdings (ARX) insider transactions?

The transactions involved Class A Common Shares of Accelerant Holdings. All reported entries on the Form 4 relate to non-derivative Class A Common Shares, with no derivative securities or option exercises disclosed in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/24/2026 - 08:08 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ONeill Francis James

(Last) (First) (Middle)

UNIT 106, WINDWARD 3

REGATTA OFFICE PARK, WEST BAY ROAD

(Street)

GRAND CAYMAN KY1-1108

(City) (State) (Zip)

CAYMAN ISLANDS

(Country)

2. Issuer Name and Ticker or Trading Symbol
Accelerant Holdings [ ARX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-Founder, Chief U/W Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Shares	06/22/2026		S		70,536(1)	D	$13.2072(2)	7,126,589	I	By Famed Ventures Limited(3)
Class A Common Shares	06/23/2026		S		76,464(1)	D	$13.1098(4)	7,050,125	I	By Famed Ventures Limited(3)
Class A Common Shares								166,644	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.89 to $13.6150, 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.

3. These securities are held directly by Famed Ventures Limited. The Reporting Person is the sole director and owner of Famed Ventures Limited.

4. 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 $13.30, 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.

Remarks:

Exhibit List: Exhibit 24 - Power of Attorney

	/s/ Robert L. Villasenor, attorney-in-fact for Francis James O'Neill	06/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)