Boston Partners reports 6.07% stake in American Integrity Insurance Group (AII)

Rhea-AI Filing Summary

Boston Partners has disclosed a 6.07% passive stake in American Integrity Insurance Group, Inc. The investment adviser reports beneficial ownership of 1,189,292 shares of American Integrity’s common stock as of 12/31/2025, with sole voting and sole dispositive power over all of these shares and no shared power. The shares are held in discretionary accounts for certain clients, and Boston Partners states that no other person has rights to dividends or sale proceeds for more than 5% of the class. The firm certifies that the position was acquired and is held in the ordinary course of business and not for the purpose of changing or influencing control of the company.

Insights

Institutional ownership analyst

Boston Partners reports a passive 6.07% stake in American Integrity.

Boston Partners, a Delaware investment adviser, reports beneficial ownership of 1,189,292 shares of American Integrity Insurance Group common stock, representing 6.07% of the class as of 12/31/2025. It holds sole voting and sole dispositive power over all reported shares, indicating centralized control of how these shares are voted and potentially traded.

The shares are held in discretionary accounts for certain clients, and the filing notes that no other person has rights to dividends or sale proceeds for more than 5% of the class. Boston Partners certifies that the position is held in the ordinary course of business and not with the purpose or effect of influencing control, which characterizes this as a passive institutional holding rather than an activist position.

For investors, this reflects the presence of a sizable professional shareholder in American Integrity’s investor base. Future ownership reports from Boston Partners and other large holders in regular SEC filings may show whether this stake grows, shrinks, or remains stable over time.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

American Integrity Insurance Group, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

026948109

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 026948109

1

Names of Reporting Persons

Boston Partners

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,189,292.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,189,292.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,189,292.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.07 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: American Integrity Insurance Group, Inc.
(b)	Address of issuer's principal executive offices: 5426 BAY CENTER DRIVE, SUITE 600, TAMPA, FLORIDA 33609
Item 2.
(a)	Name of person filing: Boston Partners
(b)	Address or principal business office or, if none, residence: ONE BEACON STREET 30TH FLOOR BOSTON, Massachusetts 02108
(c)	Citizenship: Boston Partners - DELAWARE
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 026948109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,189,292
(b)	Percent of class: 6.07 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Boston Partners - 1,189,292
	(ii) Shared power to vote or to direct the vote: Boston Partners - 0
	(iii) Sole power to dispose or to direct the disposition of: Boston Partners - 1,189,292
	(iv) Shared power to dispose or to direct the disposition of: Boston Partners - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. This Schedule is being filed with respect to 1,189,292 shares of American Integrity Insurance Group (the Common Stock) held by Boston Partners on 12/31/2025 for the discretionary account of certain clients. By reason of rule 13d-3 under the act Boston Partners may be deemed to be a beneficial owner of such Common Stock. To the knowledge of Boston Partners no person has the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of such Common Stock which represents more than 5% of the outstanding shares of the Common Stock referred to in item 4(b) hereof.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Boston Partners

Signature:	/s/Akiko Lindholm
Name/Title:	Senior Compliance Manager
Date:	01/14/2026

FAQ

What percentage of American Integrity Insurance Group (AII) does Boston Partners own?

Boston Partners reports beneficial ownership of 6.07% of American Integrity Insurance Group’s common stock as of 12/31/2025.

How many American Integrity Insurance Group (AII) shares does Boston Partners hold?

Boston Partners reports beneficial ownership of 1,189,292 shares of American Integrity Insurance Group, Inc. common stock.

Is Boston Partners an active or passive investor in American Integrity Insurance Group (AII)?

Boston Partners certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose or effect of changing or influencing control of American Integrity Insurance Group.

Does Boston Partners share voting or dispositive power over its AII shares with others?

No. The filing shows sole voting power and sole dispositive power over 1,189,292 shares, with zero shared voting or shared dispositive power.

Who ultimately benefits from Boston Partners’ ownership of AII shares?

The 1,189,292 shares are held by Boston Partners for the discretionary accounts of certain clients. The filing states that no person has rights to dividends or sale proceeds for more than 5% of the outstanding common stock.

What type of entity is Boston Partners in this AII ownership filing?

Boston Partners is classified as an investment adviser (Type of Reporting Person: IA) organized in Delaware.