Neptune Insurance Holdings(NP) - Prospectus(update)

As filed with the Securities and Exchange Commission on September 22, 2025. Registration No. 333-289995 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 TO FORM S-1 REGISTRATION STATEMENT Under The Securities Act of 1933 _____________________________________ NEPTUNE INSURANCE HOLDINGS INC. (Exact name of registrant as specified in its charter) _____________________________________ Delaware 6411 33-4189588 (State or other jurisdiction of incorporation or organization) ( ...