On March 30, 2026, Terrestrial Energy Inc. (NASDAQ: IMSR) announced its financial results for the fourth quarter and full year ended December 31, 2025, reporting a net loss of $28 million, which represents a $17 million increase from the previous year. The increase in losses is attributed to higher research and development (R&D) costs, general and administrative expenses, and interest expenses. Specifically, R&D costs rose by $5 million as the company expanded materials testing and progressed graphite qualification work. General and administrative expenses increased by $10 million due to legal and accounting fees, personnel-related expenses, and stock-based compensation. Additionally, interest expenses grew by $2 million due to higher debt balances and amortization of debt discount.

Despite the financial losses, Terrestrial Energy highlighted significant progress in regulatory readiness and project development. The U.S. Nuclear Regulatory Commission (NRC) completed its safety evaluation and accepted the company's Topical Report submission on IMSR Principal Design Criteria, which is crucial for licensing readiness. Furthermore, the company received two awards from the U.S. Department of Energy (DOE) to support its advanced reactor programs, which are expected to accelerate the pathway for IMSR Plant licensing and commercial operation.

The company also announced a successful business combination with HCM II Acquisition Corp, raising approximately $292 million in gross proceeds. This transaction is expected to strengthen Terrestrial Energy's balance sheet and enhance its ability to execute its growth strategy. The company is focused on deploying its Generation IV Integral Molten Salt Reactor (IMSR) technology, which aims to provide reliable, clean energy solutions for industrial markets.

Looking ahead, Terrestrial Energy plans to provide updates on expected milestones for 2026, including commercial, regulatory, and development progress during its upcoming earnings call. The company remains committed to advancing its IMSR technology and engaging with regulators, suppliers, and industrial partners to build and license the first IMSR plants in the early 2030s.

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