{"schema_version":"secwatch.filing_event.v1","accession":"0002019804-26-000018","form_type":"8-K","ticker":"IMSR","cik":"0002019804","company_name":"Terrestrial Energy Inc. /DE/","filed_at":"2026-07-28T20:35:43+00:00","discovered_at":"2026-07-28T20:37:00.248954+00:00","generated_at":"2026-07-28T20:37:06.396454+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Terrestrial Energy appoints nuclear industry veteran Kathryn McCarthy to Board; Q2 earnings call set for Aug 11","bullets":["Kathryn McCarthy appointed to Board effective July 22, 2026; she is a member of National Academy of Engineering.","McCarthy previously directed US ITER Project Office at Oak Ridge National Lab and held senior roles at Idaho National Lab.","Company to report Q2 2026 earnings before market open on August 11, 2026; conference call at 8:30 a.m. ET.","McCarthy's experience includes leadership at Canadian Nuclear Laboratories and over 25 years at Idaho National Laboratory."],"urls":{"canonical":"https://secwatch.observer/filing/0002019804-26-000018","json":"https://secwatch.observer/filing/0002019804-26-000018.json","markdown":"https://secwatch.observer/filing/0002019804-26-000018.md","text":"https://secwatch.observer/filing/0002019804-26-000018.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000018/0002019804-26-000018-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000018/tmb-20260723x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-07-28T20:37:06.396454+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":[{"claim_id":"63e3b2c25b","claim":"Kathryn McCarthy was appointed as director at Terrestrial Energy Inc. /DE/.","evidence_excerpt":"On July 22, 2026, the Board of Directors (the \"Board\") of Terrestrial Energy Inc. (the “Company”) appointed Kathryn McCarthy to serve as a director of the Company, effective on July 22, 2026.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000018/0002019804-26-000018-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}