[Form 4] Ategrity Specialty Insurance Company Holdings Insider Trading Activity

Rhea-AI Filing Summary

Insider purchase reported: A Form 4 shows that Stuart J. Zimmer and Zimmer Financial Services Group LLC acquired additional shares of Ategrity Specialty Insurance Co Holdings (ASIC) on 08/13/2025. Mr. Zimmer is identified as a director and a greater-than-10% owner; ZFSG is also a 10% owner. The filing reports a purchase of 5,051 common shares at a weighted-average price of $19.4864 per share, executed in multiple trades priced between $19.34 and $19.50. After the transaction, beneficial ownership is reported as 38,517,491 shares (indirect) plus 253,330 shares held by trusts.

Positive

• Insider purchase disclosed: Director and >10% owner acquired 5,051 shares at a weighted-average price of $19.4864, showing purchasing activity by a major holder.

Negative

• None.

Insights

Financial Analyst

TL;DR: Director and 10% owner purchased a small incremental stake at ~$19.49; overall beneficial holdings remain large.

This Form 4 discloses a modest open-market purchase of 5,051 shares at a weighted-average price of $19.4864. The acquisition size is small relative to the reported indirect holding of 38.5 million shares, so the transaction is immaterial to outstanding position sizing but signals continued purchasing activity by a major shareholder. The filing clarifies that some shares are held of record by Zimmer Financial Services Group LLC and additional shares are held via trusts, with Mr. Zimmer as sole managing member of ZFSG.

Corporate Governance Expert

TL;DR: Director/10% owner disclosed purchase; ownership structure and control are clearly stated.

The disclosure properly identifies the reporting persons and their relationships to the issuer, and includes the weighted-average price range for the multiple trades. Footnotes explain indirect ownership through Zimmer Financial Services Group LLC and trusts, and the filing is signed by an attorney-in-fact. From a governance and disclosure perspective, the Form 4 appears complete and compliant with Section 16 reporting requirements.

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

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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^*

Zimmer Stuart J.

(Last) (First) (Middle)

ATEGRITY SPECIALTY INSURANCE CO HOLDINGS

9 WEST 57TH STREET, 33RD FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Ategrity Specialty Insurance Co Holdings [ ASIC ]

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

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2025

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

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

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

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
Common Stock	08/13/2025		P		5,051	A	$19.4864(1)	38,517,491	I	See Footnote(2)
Common Stock								253,330	I	By Trusts

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

1. Name and Address of Reporting Person^*

Zimmer Stuart J.

(Last) (First) (Middle)

ATEGRITY SPECIALTY INSURANCE CO HOLDINGS

9 WEST 57TH STREET, 33RD FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Zimmer Financial Services Group LLC

(Last) (First) (Middle)

ATEGRITY SPECIALTY INSURANCE CO HOLDINGS

9 WEST 57TH STREET, 33RD FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $19.34 to $19.50, 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 purchased at each separate price within the ranges set forth in this footnote.

2. Securities held of record by Zimmer Financial Services Group LLC ("ZFSG"). Mr. Zimmer is the sole managing member of ZFSG and therefore may be deemed to share beneficial ownership of the securities held of record by ZFSG.

	/s/ Eric Crespolini, Attorney-in-Fact for Stuart J. Zimmer	08/15/2025
	/s/ Eric Crespolini, Attorney-in-Fact for Zimmer Financial Services Group LLC	08/15/2025
	** 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.

FAQ

What did the ASIC Form 4 filed by Stuart J. Zimmer report?

The Form 4 reports the purchase of 5,051 common shares of Ategrity Specialty Insurance Co Holdings on 08/13/2025 at a weighted-average price of $19.4864.

How many shares does Stuart J. Zimmer beneficially own after the transaction?

The filing reports 38,517,491 shares beneficially owned indirectly plus 253,330 shares held by trusts after the reported transaction.

Who else is named as a reporting person on the Form 4?

Zimmer Financial Services Group LLC is named; it is recorded as a 10% owner and Mr. Zimmer is the sole managing member, which may give him indirect beneficial ownership of ZFSG-held shares.

What price range were the purchased shares executed at?

The footnote states the shares were purchased in multiple transactions at prices ranging from $19.34 to $19.50, and the reported price is a weighted average of $19.4864.

When was the Form 4 signed and who signed it?

The form is signed by Eric Crespolini, Attorney-in-Fact for both Stuart J. Zimmer and Zimmer Financial Services Group LLC on 08/15/2025.