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

Rhea-AI Filing Summary

Stuart J. Zimmer and Zimmer Financial Services Group LLC reported purchases of Ategrity Specialty Insurance Co Holdings (ASIC) common stock. Transactions include 6,130 shares acquired on 09/29/2025 at a weighted-average price of $19.3741 and 5,000 shares acquired on 09/30/2025 at a weighted-average price of $19.4651. Following the 09/29 purchases, beneficial ownership reported was 38,533,541 shares (indirect); after the 09/30 purchases it rose to 38,538,541 shares (indirect). The filing notes an additional 253,330 shares held indirectly by trusts and clarifies that Zimmer is the sole managing member of Zimmer Financial Services Group LLC, which holds shares of record.

Positive

• Insider purchases disclosed on 09/29/2025 and 09/30/2025 showing active acquisition of ASIC shares
• Clear reporting of beneficial ownership, with post-transaction totals of 38,533,541 and 38,538,541 shares (indirect)
• Disclosure of ownership structure clarifying Zimmer is sole managing member of Zimmer Financial Services Group LLC

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Insider purchases by a director and 10% owner indicate continued ownership alignment, disclosed per Section 16 reporting rules.

The Form 4 shows routine open-market purchases by Stuart J. Zimmer and Zimmer Financial Services Group LLC on consecutive days at prices in the $19.07–$19.50 range, using weighted-average pricing footnotes. Reported beneficial ownership after the transactions is substantial, exceeding 38.5 million shares held indirectly, with an additional 253,330 shares via trusts. The filing properly discloses the relationship between Zimmer and the holding LLC, and is signed by an attorney-in-fact, meeting execution formalities.

Securities Analyst

TL;DR: Small incremental insider purchases were disclosed; they are notable but not necessarily material on their own.

The transactions comprise modest share additions (6,130 and 5,000 shares) executed across multiple trades at disclosed weighted-average prices. The filing provides transaction detail and ownership totals, showing large existing indirect holdings through Zimmer Financial Services Group LLC. While insider buying can be a positive signal, the disclosed purchase sizes are small relative to the reported total holdings and the filing contains no additional corporate financial information.

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
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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).

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)
09/29/2025

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	09/29/2025		P		6,130	A	$19.3741(1)	38,533,541	I	See Footnote(2)
Common Stock	09/30/2025		P		5,000	A	$19.4651(3)	38,538,541	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 $19.07 to $19.48, 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.

3. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $19.29 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

	/s/ Eric Crespolini, Attorney-in-Fact for Stuart J. Zimmer	10/01/2025
	/s/ Eric Crespolini, Attorney-in-Fact for Zimmer Financial Services Group LLC	10/01/2025
	** 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.
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FAQ

What trades did Stuart J. Zimmer report on Form 4 for ASIC?

He reported purchasing 6,130 shares on 09/29/2025 at a weighted-average price of $19.3741 and 5,000 shares on 09/30/2025 at a weighted-average price of $19.4651.

How many ASIC shares does Zimmer beneficially own after these transactions?

The filing reports beneficial ownership of 38,538,541 shares (indirect) following the 09/30/2025 transaction, plus 253,330 shares held indirectly by trusts.

Who else filed the Form 4 alongside Stuart J. Zimmer?

Zimmer Financial Services Group LLC also filed; the filing states Zimmer is the sole managing member and may be deemed to share beneficial ownership of shares held of record by ZFSG.

Were the reported prices single trades or weighted averages?

The reported prices are weighted-average prices reflecting multiple transactions: the 09/29 price covers trades from $19.07 to $19.48; the 09/30 price covers trades from $19.29 to $19.50.

Who signed the Form 4 filing?

The form was signed by Eric Crespolini, Attorney-in-Fact for both Stuart J. Zimmer and Zimmer Financial Services Group LLC on 10/01/2025.