IMSR — Terrestrial Energy Inc.

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

1. Key Financial Results and Metrics

• Net Loss: $28 million for 2025, an increase of $17 million from the prior year, primarily due to rising expenses related to engineering, regulatory activities, and organizational expansion.
• R&D Expenses: Increased to $10 million, up $5 million year-over-year, reflecting expanded materials testing and graphite qualification work.
• General and Administrative Expenses: Rose to $14 million, an increase of $10 million, driven by personnel expansion and professional services related to public company readiness.
• Cash Position: Approximately $298 million in cash and short-term investments at year-end, bolstered by a business combination with HCM II, which generated over $292 million in gross proceeds.

2. Strategic 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, a crucial step towards the IMSR operating license submission.
• Federal Support: Received two awards from the Department of Energy to accelerate advanced reactor development, supporting the TETRA and TEFLA projects.
• Supply Chain Development: Strengthened partnerships with leading industrial nuclear suppliers, including Westinghouse and Siemens Energy, to enhance supply chain readiness for IMSR commercial operations.
• Project Development: Announced the selection of Texas A&M University for a full-scale IMSR plant site and a collaboration with Ameresco for project development.

3. Forward Guidance and Outlook

• 2026 Expectations: Anticipate announcing 1 to 3 additional commercial projects, further agreements with Texas A&M, and submitting at least 3 additional Topical Reports to the NRC.
• Focus Areas: Continued emphasis on disciplined execution across engineering, regulatory developments, and supply chain advancements.

4. Bad News, Challenges, or Points of Concern

• Increased Losses: The significant rise in net loss indicates growing operational costs, which could raise concerns about financial sustainability if not managed effectively.
• Regulatory Complexity: While progress has been made, navigating the regulatory landscape remains a challenge, particularly with the potential for delays in licensing processes.
• Market Competition: The nuclear energy sector is competitive, and Terrestrial Energy must differentiate itself effectively to secure market share in a rapidly evolving energy landscape.

5. Notable Q&A Insights

• Project Maturity: In response to inquiries about future project announcements, management emphasized that the definition of an IMSR project begins with location and the intention of parties to proceed, suggesting ongoing discussions but no definitive timelines.
• Licensing Pathways: Management acknowledged the potential benefits of pursuing the NRC's new Part 53 licensing pathway but indicated that their current strategy remains focused on the Part 50 approach for initial plants.

This earnings call highlighted Terrestrial Energy's strategic positioning and progress in the nuclear energy sector while also addressing the financial challenges and competitive landscape it faces moving forward.