Terrestrial Energy Inc SEC Filings

Terrestrial Energy Inc. files a Post-Effective Amendment to its Form S-1 to register a primary offering of up to 53,492,818 shares of common stock (including shares issuable upon exercise of warrants and exchangeable shares) and a resale registration for up to 13,723,445 shares and 1,267,599 warrants, subject to completion. The prospectus discloses that the Selling Securityholders may sell Resale Securities from time to time by various methods and that the Company will receive proceeds only if warrants are exercised for cash. The filing states aggregate cash proceeds if all Public and Private Placement Warrants are exercised would be approximately $225.6 million, and if all Legacy Terrestrial Warrants are exercised would be approximately $23.9 million. The prospectus notes 105,935,266 shares and share equivalents outstanding as of May 29, 2026 and that the Resale Securities represent approximately 20.7% of issued and outstanding common stock.

Registration for up to 151,970,541 common shares and 18,350,000 warrants. This Supplement No. 3 to the Form S-4 prospectus updates the offering materials to incorporate Terrestrial Energy Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026. The supplement clarifies current financials from the Form 10-Q: cash and cash equivalents of $76,946, short-term investments of $198,018, and a net loss of $10,503 for the three months ended March 31, 2026. The Form 10-Q shows common shares issued and outstanding of 82,242,434 as of March 31, 2026 and reports 105,935,254 ordinary shares outstanding as of May 6, 2026. The supplement amends and supersedes prior prospectus disclosures where inconsistent and should be read together with the Prospectus.

Terrestrial Energy Inc. files a Supplement No. 2 to its Prospectus (Form S-1) dated December 30, 2025, updating the offering terms and incorporating selected disclosures from its Quarterly Report on Form 10-Q for the quarter ended March 31, 2026.

The supplement registers a primary offering of up to 18,776,119 shares of common stock and a secondary (resale) offering of 18,792,599 shares, together with 1,267,599 warrants to purchase common stock. The filing cites condensed consolidated financials showing $76,946 in cash, $198,018 in short-term investments, and a net loss of $10,503 for the three months ended March 31, 2026. The supplement is conditioned by the Prospectus and updates that document where conflicts exist.

Terrestrial Energy Inc. reported a net loss of $10,503 (amounts in thousands) for the three months ended March 31, 2026, unchanged at $(0.10) per share versus 2025 due to higher share count. Operating expenses more than doubled to $11,931, driven by increased research and development spending of $4,566 and general and administrative costs of $7,304 as the company scales its Integral Molten Salt Reactor program.

Despite higher losses, Terrestrial Energy ended the quarter with $76,946 in cash and cash equivalents and $198,018 in short-term investments, supporting net working capital of $271,695 and total assets of $295,168. Management believes this liquidity, enhanced by more than $292,000 of gross proceeds from its late‑2025 business combination and related financing, is sufficient to fund operations for at least the next twelve months while it advances IMSR development and DOE-supported pilot projects.

Terrestrial Energy Inc. reported first quarter 2026 results, highlighting a development-stage nuclear business with a substantial cash position and growing expenses as projects advance. The company focuses on its Integral Molten Salt Reactor (IMSR) engineering and regulatory programs, supply chain development, and commercial pipeline.

As of March 31, 2026, Terrestrial Energy held $289.9 million in cash and investments and described its balance sheet as providing a significant runway. Net loss for the quarter was $10.5 million, or $(0.10) per share, compared with a $6.3 million loss a year earlier, driven by higher research and development and general and administrative costs.

Total operating expenses rose to $11.9 million from $4.9 million, reflecting increased R&D and corporate spending. Other income turned positive, helped by $1.5 million of interest and dividend income and minimal interest expense after prior-period convertible note financing. The company ended the quarter with $295.2 million in total assets and $6.6 million in total liabilities.

Terrestrial Energy Inc. reported that director David Hill has notified the company he will resign from its Board of Directors effective July 1, 2026.

Hill has served on the Board since 2014, and the company states his resignation is not due to any disagreement about its operations, policies, or practices.

Terrestrial Energy Inc. is asking stockholders to vote at its 2026 virtual annual meeting. The meeting will be held by live webcast on June 11, 2026 at 10:00 a.m. Eastern time for holders of common stock and special voting preferred stock as of April 20, 2026.

Stockholders are being asked to elect three Class I directors — Frederick Buckman, William Johnson, and Hugh MacDiarmid — to terms running to the 2029 annual meeting, and to ratify UHY LLP as independent registered public accounting firm for the fiscal year ending December 31, 2026. The Board recommends voting “FOR” all nominees and “FOR” auditor ratification.

The proxy also describes the company’s classified nine‑member board structure, committee composition, director independence determinations, executive and director compensation programs, and ownership data. It notes the October 2025 business combination in which HCM II Acquisition Corp. became Terrestrial Energy Inc. and the company’s shares and warrants began trading on Nasdaq under “IMSR” and “IMSRW.”