{"filing":{"accession_number":"0001104659-26-117389","cik":"0001918102","ticker":"FISN","company_name":"DEEP FISSION, INC.","form":"8-K","filing_date":"2026-10-20","report_date":"2026-10-20","primary_document":"tm2627978d1_8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1918102/000110465926117389/tm2627978d1_8k.htm"},"events":[{"id":36375,"run_id":33538,"accession_number":"0001104659-26-117389","anchor_item_number":"7.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"Deep Fission announced execution of a binding 25-year Master Energy Purchase Agreement with the Great Plains Development Authority for a planned commercial nuclear power project, with an initial phase of 150 MW targeted for September 2028 and potential expansion to 2 GW by 2031. This represents a material operational and strategic milestone—conversion of a December 2025 letter of intent into a definitive commercial contract—that would affect a reasonable investor's assessment of the company's path to commercialization and revenue generation, though it remains subject to regulatory approvals and other conditions.","company_name":"DEEP FISSION, INC.","ticker":"FISN","filing_date":"2026-10-20","form":"8-K","submitted_at":null,"items":[{"id":40770,"accession_number":"0001104659-26-117389","item_number":"7.01","item_title":"Regulation FD Disclosure","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"Deep Fission announced execution of a binding 25-year Master Energy Purchase Agreement with the Great Plains Development Authority for a planned commercial nuclear power project, with an initial phase of 150 MW targeted for September 2028 and potential expansion to 2 GW by 2031. This represents a material operational and strategic milestone—conversion of a December 2025 letter of intent into a definitive commercial contract—that would affect a reasonable investor's assessment of the company's path to commercialization and revenue generation, though it remains subject to regulatory approvals and other conditions.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T19:55:38.356724+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":40770,"accession_number":"0001104659-26-117389","item_number":"7.01","item_title":"Regulation FD Disclosure","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"Deep Fission announced execution of a binding 25-year Master Energy Purchase Agreement with the Great Plains Development Authority for a planned commercial nuclear power project, with an initial phase of 150 MW targeted for September 2028 and potential expansion to 2 GW by 2031. This represents a material operational and strategic milestone—conversion of a December 2025 letter of intent into a definitive commercial contract—that would affect a reasonable investor's assessment of the company's path to commercialization and revenue generation, though it remains subject to regulatory approvals and other conditions.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T19:55:38.356724+00:00","company_name":"DEEP FISSION, INC.","ticker":"FISN","filing_date":"2026-10-20"}]}