Accelerant COO granted 180,667 RSUs

Sternberg Matthew David reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Sternberg Matthew David reported acquisition or exercise transactions in this Form 4 filing.

Accelerant Holdings reported that Matthew David Sternberg, COO of Risk Exchange, received an award of 180,667 Class A Common Share RSUs on March 18, 2026. These restricted stock units were granted at no cash cost and are part of his equity compensation.

The RSUs are scheduled to vest as to 25% on the one-year anniversary of the grant date and 6.25% on the first day of each of the twelve calendar quarters after that anniversary. Following this award, Sternberg directly holds 338,631 Class A Common Shares.

Insider Trade Summary

Grant/Award: 180,667 shares

Grant/Award 1 txn

Insider Sternberg Matthew David

Role COO, Risk Exchange

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Shares	180,667	$0.00	$0.00

Holdings After Transaction: Class A Common Shares — 338,631 shares (Direct)

Footnotes (1)

1. F1. Represents an award of Restricted Stock Units granted on March 18, 2026. The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary.

FAQ

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

What insider transaction did Accelerant Holdings (ARX) report for Matthew David Sternberg?

Accelerant Holdings reported that COO, Risk Exchange, Matthew David Sternberg received an equity grant of 180,667 Class A Common Share restricted stock units. The award is a compensation-related grant, not an open-market share purchase or sale, and increases his direct share holdings.

How many Accelerant Holdings (ARX) shares does Matthew David Sternberg hold after this Form 4?

After this transaction, Matthew David Sternberg directly holds 338,631 Class A Common Shares of Accelerant Holdings. This total includes the newly granted 180,667 restricted stock units, which will vest over time according to the disclosed schedule in the filing’s footnote.

What are the vesting terms of the 180,667 RSUs granted by Accelerant Holdings (ARX)?

The 180,667 restricted stock units vest 25% on the one-year anniversary of the March 18, 2026 grant date. The remaining RSUs vest 6.25% on the first day of each of twelve calendar quarters beginning after that anniversary, creating a multi-year vesting schedule.

Was cash paid for the Accelerant Holdings (ARX) RSU grant to Matthew David Sternberg?

No cash was paid for this grant. The Form 4 shows a transaction price per share of 0.0000, indicating the 180,667 restricted stock units were awarded as equity compensation rather than purchased in the open market by the reporting person.

What does transaction code “A” mean in the Accelerant Holdings (ARX) Form 4 filing?

Transaction code “A” in this Form 4 indicates a grant, award, or other acquisition of securities. Here it reflects the compensation-related grant of 180,667 restricted stock units to Matthew David Sternberg, rather than an open-market buy or sell transaction.

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

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Accepted by SEC EDGAR 03/20/2026 - 06:43 PM 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).

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^*

Sternberg Matthew David

(Last) (First) (Middle)

UNIT 106, WINDWARD 3

REGATTA OFFICE PARK, WEST BAY ROAD

(Street)

GRAND CAYMAN KY1-1108

(City) (State) (Zip)

UNITED STATES

(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)
	COO, Risk Exchange

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

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	03/18/2026		A		180,667(1)	A	$0	338,631	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. Represents an award of Restricted Stock Units granted on March 18, 2026. The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary.

Remarks:

	/s/ David Pelsue, Attorney-in-Fact	03/20/2026
	** 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)