{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-046488","form_type":"8-K","ticker":"FISN","cik":"0001918102","company_name":"DEEP FISSION, INC.","filed_at":"2026-04-22T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.276886+00:00","generated_at":"2026-05-15T04:56:27.004602+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Deep Fission confidentially submits draft S-1 for proposed IPO of common stock","bullets":["Confidential submission of Form S-1 to SEC for a proposed public offering of common stock.","Number of shares and price range not yet determined; offering subject to market conditions.","Deep Fission develops small modular pressurized water reactors installed one mile underground."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-046488","json":"https://secwatch.observer/filing/0001104659-26-046488.json","markdown":"https://secwatch.observer/filing/0001104659-26-046488.md","text":"https://secwatch.observer/filing/0001104659-26-046488.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1918102/000110465926046488/0001104659-26-046488-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1918102/000110465926046488/tm2612289d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T04:56:27.004602+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}