144 0002087995 XXXXXXXX LIVE 0002067129 NEPTUNE INSURANCE HOLDINGS INC. 001-42878 400 6TH ST S ST. PETERSBURG FL 33701 727-202-4815 BSIV HOLD 101, LP 10% Stockholder Class A Common Stock Morgan Stanley & Co. LLC

1585 Broadway New York NY 10036

1632160 54220355.20 93773525 07/29/2026 NYSE Class A Common Stock 10/01/2025 Converted from convertible preferred stock acquired in a private placement. Issuer N 27293482 05/10/2023 Cash N BSIV Hold 101, LP

200 Park Avenue, 45th Floor New York NY 10166

Class A Common Stock 05/15/2026 4589351 126207152.50 BSIV Hold 101, LP

200 Park Avenue, 45th Floor New York NY 10166

Class A Common Stock 05/19/2026 688403 18931082.50 The shares of Class A Common Stock listed in Table II were sold in the past three months in a registered offering. 07/29/2026 /s/ Michelle Riley