Summary of Terrestrial Energy's Q4 and Full Year 2025 Earnings Call

1Key Financial Results and Metrics

Net Loss: Terrestrial Energy reported a net loss of $28 million for 2025, an increase of $17 million from the previous year.

R&D Expenses: Increased to $10 million, reflecting expanded materials testing and graphite qualification work.

General and Administrative Expenses: Rose to $14 million, up $10 million due to personnel expansion and corporate infrastructure costs.

Interest Expense: Increased to $4 million, attributed to larger debt balances.

Cash Position: At year-end, the company had approximately $298 million in cash and short-term investments, bolstered by a business combination with HCM II that generated over $292 million in gross proceeds.

2Strategic Updates and Business Highlights

Public Listing: Terrestrial Energy began trading on NASDAQ under the ticker IMSR on October 29, 2025, following a successful business combination.

Regulatory Progress: The NRC completed and accepted the Topical Report on IMSR Principal Design Criteria, marking a significant step towards licensing.

Partnerships: Collaborations with Texas A&M University for a full-scale IMSR plant and with Ameresco for project development were highlighted.

Supply Chain Development: Continued relationships with major suppliers like Westinghouse and Siemens Energy to enhance fuel supply and reactor component readiness.

3Forward Guidance and Outlook

2026 Expectations: Anticipated announcements of 1 to 3 additional commercial projects, further agreements with Texas A&M, and submission of at least 3 additional Topical Reports to the NRC.

Project Development: Plans to provide updates on the TETRA and TEFLA projects, which are crucial for regulatory readiness and commercial operations.

4Challenges and Points of Concern

Increased Losses: The rise in net loss and expenses raises concerns about the company’s current financial sustainability and the need for continued investment.

Regulatory Complexity: While progress has been made, navigating the regulatory landscape remains a challenge, particularly with the potential for changes in licensing pathways (e.g., NRC's Part 53).

Market Competition: The nuclear energy sector is competitive, and Terrestrial Energy must differentiate its IMSR technology to capture market share effectively.

5Notable Q&A Insights

Project Maturity: In response to inquiries about future project announcements, CEO Simon Irish emphasized that projects are defined by location and the intention of involved parties, suggesting a cautious approach to disclosures.

Licensing Pathways: The company is considering the NRC's Part 53 licensing as a potential option but currently plans to pursue a Part 50 strategy for its first plants, indicating a preference for a more traditional regulatory approach. Overall, 2025 was a transformative year for Terrestrial Energy, marked by significant regulatory advancements and strategic partnerships, despite facing challenges related to rising costs and competitive pressures in the nuclear energy sector.