Registration Statement No. 333- Table of Contents As filed with the Securities and Exchange Commission on September 19, 2025. FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Andersen Group Inc. (Exact name of Registrant as specified in its charter) Delaware 7389 33-4630773 (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer incorporation or organization) Classification Code Number) Identification Number) Andersen Group Inc. 333 Bush Street Suite 1700 San Francisco, ...