X0202 SCHEDULE 13G/A 0000938206 XXXXXXXX LIVE 1 Class A Common Stock 03/31/2026 0002065708 Andersen Group Inc. 033853102 333 Bush Street, Suite 1700 San Francisco CA 94104 Rule 13d-1(b) DRIEHAUS CAPITAL MANAGEMENT LLC DE 0 560207 0 560207 560207 N 4.43 IA Andersen Group Inc. 333 Bush Street, Suite 1700, San Francisco, California, 94104 Driehaus Capital Management LLC 25 East Erie Street, Chicago, Illinois 60611 USA N IA 560207 4.43 0 560207 0 560207 N Y Y 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. DRIEHAUS CAPITAL MANAGEMENT LLC Janet McWilliams 05/15/2026