{"url_path":"/sec/imsrw/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 Exhibits","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-14","source_url":"https://www.sec.gov/Archives/edgar/data/2019804/0001104659-26-061234-index.html","accession_number":"0001104659-26-061234","cik":"0002019804","ticker":"IMSR","issuer_name":"Terrestrial Energy Inc. /DE/","edgar_url":"https://www.sec.gov/Archives/edgar/data/2019804/0001104659-26-061234-index.html","primary_entity_key":"0002019804","primary_entity_name":"Terrestrial Energy Inc. /DE/"},"word_count":524,"has_tables":true,"body_markdown":"Item 6. Exhibits\n\nThe following exhibits are filed as part of, or incorporated by reference into, this Quarterly Report on Form 10-Q.\n\n​\n\n25\n\n[Table of Contents](#TOC)\n\nEXHIBIT INDEX\n\n​\n\n​\n\n​\n\n**Exhibit** **No.**\n\n**  ​ ​ ​**\n\n**Description**\n\n​\n\n​\n\n​\n\n3.1\n\n​\n\n[Composite Certificate of Incorporation of Terrestrial Energy Inc. (as amended through March 27, 2026) (incorporated by reference to Exhibit 3.1 of the Company’s Annual Report on Form 10-K, filed with the SEC on March 30, 2026)](https://www.sec.gov/Archives/edgar/data/2019804/000110465926036846/tmb-20251231xex3d1.htm)\n\n3.2\n\n​\n\n[Composite Bylaws of Terrestrial Energy Inc. (as amended through October 28, 2025) (incorporated by reference to Exhibit 3.2 of the Company’s Annual Report on Form 10-K, filed with the SEC on March 30, 2026)](https://www.sec.gov/Archives/edgar/data/2019804/000110465926036846/tmb-20251231xex3d2.htm)\n\n3.3\n\n​\n\n[Certificate of Designations for Special Voting Preferred Stock (incorporated by reference to Exhibit 3.3 of the Company’s Annual Report on Form 10-K, filed with the SEC on March 30, 2026)](https://www.sec.gov/Archives/edgar/data/2019804/000110465926036846/tmb-20251231xex3d3.htm)\n\n4.1†\n\n​\n\n[Description of Securities](tmb-20260331xex4d1.htm)\n\n10.1\n\n​\n\n[Assignment, Assumption, Waiver and Covenant Agreement, dated as of February 18, 2026, by and between Simon Irish, Terrestrial Energy Inc., and Terrestrial Energy Development Inc. (incorporated by reference to Exhibit 10.15 of the Company’s Annual Report on Form 10-K, filed with the SEC on March 30, 2026)](https://www.sec.gov/Archives/edgar/data/2019804/000110465926036846/tmb-20251231xex10d15.htm)\n\n10.2†‡\n\n​\n\n[Canadian Addendum to Terrestrial Energy Inc. 2025 Equity Incentive Plan](tmb-20260331xex10d2.htm)\n\n10.3†‡\n\n​\n\n[Form of Restricted Stock Unit Award (Canadian) under 2025 Plan](tmb-20260331xex10d3.htm)\n\n10.4†‡\n\n​\n\n[Form of Non-Employee Director Restricted Stock Unit Award (Canadian) under 2025 Plan](tmb-20260331xex10d4.htm)\n\n10.5†‡\n\n​\n\n[Form of Stock Option Award (Canadian) under 2025 Plan](tmb-20260331xex10d5.htm)\n\n31.1†\n\n​\n\n[Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](tmb-20260331xex31d1.htm)\n\n31.2†\n\n​\n\n[Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](tmb-20260331xex31d2.htm)\n\n32.1*\n\n​\n\n[Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](tmb-20260331xex32d1.htm)\n\n32.2*\n\n​\n\n[Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](tmb-20260331xex32d2.htm)\n\n101.INS†\n\n​\n\nXBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document\n\n101.SCH†\n\n​\n\nXBRL Taxonomy Extension Schema Document\n\n101.CAL†\n\n​\n\nXBRL Taxonomy Extension Calculation Linkbase Document\n\n101.DEF†\n\n​\n\nXBRL Taxonomy Extension Definition Linkbase Document\n\n101.LAB†\n\n​\n\nXBRL Taxonomy Extension Label Linkbase Document\n\n101.PRE†\n\n​\n\nXBRL Taxonomy Extension Presentation Linkbase Document\n\n104†\n\n​\n\nCover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)\n\n†\n\nFiled herewith.\n\n*     Furnished herewith.\n\n‡     Management contract or compensatory plan or arrangement.\n\n​\n\n​\n\n26\n\n[Table of Contents](#TOC)\n\nSIGNATURES\n\nPursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, duly authorized.\n\nDate: May 14, 2026\n\n​\n\n**TERRESTRIAL ENERGY INC.**\n\n​\n\n(REGISTRANT)\n\n​\n\n​\n\n​\n\nBy:\n\n/s/ Simon Irish\n\n​\n\nName:\n\nSimon Irish\n\n​\n\nTitle:\n\nChief Executive Officer\n\n​\n\n​\n\n(Principal Executive Officer)\n\n​\n\n​\n\n​\n\n​\n\nBy:\n\n/s/ Brian Thrasher\n\n​\n\nName:\n\nBrian Thrasher\n\n​\n\nTitle:\n\nChief Financial Officer\n\n​\n\n​\n\n(Principal Financial Officer)\n\n​\n\n​\n\n​\n\n​\n\n27"}