X0202 SCHEDULE 13G/A 0001386060-25-000017 0001386060 XXXXXXXX LIVE 2 Common Stock 03/31/2026 0002007587 American Integrity Insurance Group, Inc. 026948109 3000 BAYPORT DRIVE, SUITE 500 TAMPA FL 33607 Rule 13d-1(b) Boston Partners DE 1468404 0 1468404 0 1468404 N 7.5 IA American Integrity Insurance Group, Inc. 3000 BAYPORT DRIVE, SUITE 500, TAMPA, FLORIDA 33607 Boston Partners ONE BEACON STREET 30TH FLOOR BOSTON, Massachusetts 02108 Boston Partners - DELAWARE N IA 1,468,404 7.5 Boston Partners - 1,468,404 Boston Partners - 0 Boston Partners - 1,468,404 Boston Partners - 0 Y N This Schedule is being filed with respect to 1,468,404 shares of American Integrity Insurance Group (the Common Stock) held by Boston Partners on 03/31/2026 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. Y Y Y N 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. Boston Partners /s/Ali Farooqi 05/14/2026