secwatch.observer — SEC 8-K summary
======================================

Issuer:     DEEP FISSION, INC. (FISN)
CIK:        0001918102
Form:       8-K
Filed at:   2025-09-11T23:59:59+00:00
Accession:  0001213900-25-086894
Event type: other_material
Sentiment:  neutral
Materiality: 0.85
Item codes: 1.01, 2.01, 3.02, 3.03, 4.01, 5.01, 5.02, 5.03, 5.06, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Deep Fission completes reverse merger with Surfside, raises $30M for nuclear reactors
--------------------------------------------------------------------------------

- Merger closed Sept 5, 2025; Deep Fission becomes public via reverse merger with Surfside Acquisition.
- Raised $30M ($3/share) in private placement; net ~$26M for R&D, working capital, and pilot reactor.
- New leadership: Elizabeth Muller (CEO), Richard Muller (CTO), William 'Mark' Schmitz (CFO).
- 50.8M shares outstanding post-merger; Legacy Deep Fission holders get 38.5M shares.
- Company developing 15 MWe underground pressurized water nuclear reactors in boreholes one mile deep.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1918102/000121390025086894/0001213900-25-086894-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1918102/000121390025086894/ea0256443-8k_deep.htm
  HTML page:      https://secwatch.observer/filing/0001213900-25-086894

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer