- CEO
- Simon Irish
- Sector
- Energy
- Industry
- Regulated Electric
- Address
- 2730 W. Tyvola Road Charlotte NC United States of America 28217
- IPO Date
- Oct 24, 2025
- Business
- Terrestrial Energy Inc. (Nasdaq: IMSR) develops and commercializes Generation IV nuclear power plants featuring its proprietary Integral Molten Salt Reactor (IMSR) technology, which delivers zero-carbon, high-temperature industrial heat and electricity through a small modular reactor design using molten salt coolant, enriched uranium fuel, and graphite moderation; the IMSR plant configuration comprises two 442 MWt core units providing 884 MWt total thermal capacity and 390 MWe electrical output for cogeneration applications including data center power, industrial process heat, grid power, and green fuels production. The company targets industrial sectors requiring reliable, dispatchable clean energy such as chemical synthesis, manufacturing, and AI-driven data operations, with operations focused primarily in North America including the United States and Canada. Founded in 2013 and headquartered in Oakville, Ontario, Canada, Terrestrial Energy operates independently following its October 2025 business combination with HCM II Acquisition Corp., which raised over $292 million in gross proceeds including a $50 million PIPE to accelerate IMSR commercialization.
The IMSR differentiates from conventional light-water reactors through its low-pressure operation, inherent safety features, 44% electrical efficiency, reduced waste generation, and modular construction enabling deployment in under four years; it supports dual-use energy roles with remote thermal, steam, and electric systems customizable for hybridization with other sources. Products encompass IMSR 400 core units (195-200 MWe each), full IMSR plants for co-located industrial power and heat, and associated fuel services leveraging standard low-enriched uranium without HALEU requirements. Geographic focus includes U.S. sites like the Texas A&M University RELLIS campus, selected in February 2025 via competitive RFP for initial commercial IMSR deployment.
Recent developments include the Canadian Nuclear Safety Commission's successful completion of the IMSR programmatic Pre-Licensing Vendor Design Review in 2023; U.S. Department of Energy selections for the Advanced Reactor Pilot Program (Project TETRA, targeting initial criticality by July 2026) and Fuel Line Pilot Program in 2025; an expanded manufacturing and supply contract with Westinghouse Springfields in November 2025 for IMSR fuel pilot plant design, deconversion, fabrication, packaging, and transportation starting construction in 2026; collaborations with Ameresco Energy Solutions announced in June 2025 for customized IMSR plant projects across multiple U.S. sites; a memorandum of understanding with EnergySolutions in late 2024 for IMSR siting and deployment; and joining the Texas Nuclear Alliance as a founding member to advance nuclear initiatives in Texas. These partnerships and milestones position Terrestrial Energy to scale IMSR fleet deployment from 2030, supported by alliances with national laboratories including Idaho National Laboratory, Oak Ridge National Laboratory, and Argonne National Laboratory.