{"filing":{"accession_number":"0002019804-26-000021","cik":"0002019804","ticker":"IMSRW","company_name":"Terrestrial Energy Inc. /DE/","form":"8-K","filing_date":"2026-07-31","report_date":"2026-07-27","primary_document":"tmb-20260727x8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000021/tmb-20260727x8k.htm"},"events":[{"id":22925,"run_id":20759,"accession_number":"0002019804-26-000021","anchor_item_number":"5.02","event_type":"exec_departure","event_domain":"governance","is_material":true,"confidence":0.95,"summary":"Shawn Matthews resigned from Terrestrial Energy Inc.'s Board of Directors effective July 27, 2026. The filing explicitly discloses a director's departure with no disagreement cited, which is a material governance event affecting the composition of the board and the registrant's leadership structure.","company_name":"Terrestrial Energy Inc. /DE/","ticker":"IMSRW","filing_date":"2026-07-31","form":"8-K","submitted_at":null,"items":[{"id":23028,"accession_number":"0002019804-26-000021","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_departure","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"Shawn Matthews resigned from Terrestrial Energy Inc.'s Board of Directors effective July 27, 2026. The filing explicitly discloses a director's departure with no disagreement cited, which is a material governance event affecting the composition of the board and the registrant's leadership structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-02T02:40:05.811907+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":23028,"accession_number":"0002019804-26-000021","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_departure","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"Shawn Matthews resigned from Terrestrial Energy Inc.'s Board of Directors effective July 27, 2026. The filing explicitly discloses a director's departure with no disagreement cited, which is a material governance event affecting the composition of the board and the registrant's leadership structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-02T02:40:05.811907+00:00","company_name":"Terrestrial Energy Inc. /DE/","ticker":"IMSRW","filing_date":"2026-07-31"}]}