Company description

References in this section to “we,” “our,” “us,” the “Company” or “Terrestrial Energy” generally refer to Terrestrial Energy Inc. and its subsidiaries. Mission Terrestrial Energy Inc. is an advanced nuclear technology company developing the Integral Molten Salt Reactor nuclear plant (“IMSR Plant”), which uses the Company’s proprietary design of Molten Salt Reactor (“MSR”). Our mission is to transform global energy markets by commercializing our IMSR Plant, which will deliver low-carbon electricity and industrial heat with superior economics, speed to deployment, and siting flexibility. In a world demanding rapid, scalable nuclear solutions, the IMSR Plant offers a viable, efficient alternative to both the limitations of legacy nuclear and the intermittency of renewables. Corporate History HCM II Acquisition Corp. (“HCM II”) was a special purpose acquisition company incorporated on April 4, 2024, as a Cayman Islands exempted corporation for the purpose of effecting a merger, share exchange, asset acquisition, stock purchase, reorganization, or similar business combination with one or more businesses. On October 23, 2025, HCM II domesticated as a Delaware corporation and changed its name to “Terrestrial Energy Inc.” (the “Company”). On October 28, 2025, pursuant to the Business Combination Agreement, dated as of March 26, 2025, as amended (the “Business Combination”), the Company completed the Business Combination with Terrestrial Energy Development Inc. (“TEDI”), a Delaware corporation, with TEDI surviving as a wholly owned subsidiary of the Company.

Read the full filing description · filed 30 Mar 2026

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