{"schema_version":"secwatch.filing_event.v1","accession":"0001213900-25-093191","form_type":"8-K","ticker":"IMSR","cik":"0002019804","company_name":"Terrestrial Energy Inc. /DE/","filed_at":"2025-09-29T23:59:59+00:00","discovered_at":"2026-05-14T18:02:45.827179+00:00","generated_at":"2026-05-17T05:27:59.202408+00:00","sec_items":["8.01","9.01","7.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"HCM II and Terrestrial Energy: SEC declares S-4 effective, shareholder meeting set for Oct 20","bullets":["SEC declared effective the Registration Statement on Form S-4 on September 26, 2025 for the business combination.","HCM II shareholders to vote at Extraordinary General Meeting on October 20, 2025; record date September 24, 2025.","Post-combination company plans to list on Nasdaq under symbols IMSR and IMSRW upon closing.","Terrestrial Energy develops IMSR small modular nuclear plants with Generation IV technology.","Definitive proxy statement/prospectus began mailing to shareholders on September 26, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-25-093191","json":"https://secwatch.observer/filing/0001213900-25-093191.json","markdown":"https://secwatch.observer/filing/0001213900-25-093191.md","text":"https://secwatch.observer/filing/0001213900-25-093191.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2019804/000121390025093191/0001213900-25-093191-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2019804/000121390025093191/ea0259069-8k425_hcm2acq.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T05:27:59.202408+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"}