0001231919-25-000236.txt : 20250924 0001231919-25-000236.hdr.sgml : 20250924 20250924122043 ACCESSION NUMBER: 0001231919-25-000236 CONFORMED SUBMISSION TYPE: D PUBLIC DOCUMENT COUNT: 1 ITEM INFORMATION: Rule 506(b) provides a "safer harbor" for a private offering FILED AS OF DATE: 20250924 DATE AS OF CHANGE: 20250924 EFFECTIVENESS DATE: 20250924 FILER: COMPANY DATA: COMPANY CONFORMED NAME: DEEP FISSION, INC. CENTRAL INDEX KEY: 0001918102 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC SERVICES [4911] ORGANIZATION NAME: 01 Energy & Transportation EIN: 874265302 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: D SEC ACT: 1933 Act SEC FILE NUMBER: 021-558495 FILM NUMBER: 251336395 BUSINESS ADDRESS: STREET 1: 55 NE 5TH AVE STREET 2: SUITE 401 CITY: BOCA RATON STATE: FL ZIP: 33432 BUSINESS PHONE: 561 464 2841 MAIL ADDRESS: STREET 1: 55 NE 5TH AVE STREET 2: SUITE 401 CITY: BOCA RATON STATE: FL ZIP: 33432 FORMER COMPANY: FORMER CONFORMED NAME: Surfside Acquisition Inc. DATE OF NAME CHANGE: 20220317 D 1 primary_doc.xml X0708 D LIVE 0001918102 DEEP FISSION, INC. 2831 Garber Street Berkeley CA CALIFORNIA 94705 (707) 400-0778 DELAWARE Surfside Acquisition Inc. Corporation true 2021 Elizabeth A. Muller c/o Deep Fission, Inc. 2831 Garber Street Berkeley CA CALIFORNIA 94705 Executive Officer Director Richard A. Muller c/o Deep Fission, Inc. 2831 Garber Street Berkeley CA CALIFORNIA 94705 Executive Officer Director William Mark Schmitz c/o Deep Fission, Inc. 2831 Garber Street Berkeley CA CALIFORNIA 94705 Executive Officer Other Energy Decline to Disclose 06b false 2025-09-05 false true true true true The Issuer issued shares as consideration for the merger of Deep Fission Acquisition Co., its wholly-owned subsidiary, with and into Deep Fission Nuclear Inc. (fka Deep Fission Inc., "DFNI"), with DFNI surviving the merger as Issuer's wholly-owned sub. 0 120000000 0 120000000 There is no current public market for Issuer's common stock. Amount shown is based on the $3.00 per share purchase price for shares of common stock issued in the concurrent private placement. true 11 83 0 0 0 false DEEP FISSION, INC. /s/ Elizabeth A. Muller Elizabeth A. Muller President and CEO 2025-09-24