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Terrestrial Energy Inc. reported that EVP, Engineering Pamela Beth Cowan received a grant of 299,401 stock options under the Terrestrial Energy Inc. 2025 Equity Incentive Plan. The options have an exercise price of $5.0100 per share, become exercisable starting 2027-07-29, expire on 2036-07-29, and vest in one-third increments on each of the first, second and third anniversaries of the grant date, subject to her continued service. Following the grant, she held 299,401 derivative securities.
Terrestrial Energy Inc. is identified as the issuer in a Form 3 that names Pamela Beth Cowan, EVP, Engineering, as a reporting person. The Form 3 shows no insider stock transactions in the provided data, and the remarks reference Exhibit 24.1, a Power of Attorney.
Terrestrial Energy Inc., a Delaware corporation whose common stock trades on The Nasdaq Stock Market LLC under the symbol IMSR and whose redeemable warrants trade under IMSRW, reported a change in its Board of Directors.
On July 27, 2026, Shawn Matthews informed the company that he was resigning from the Board of Directors, effective the same day. The company states that Mr. Matthews’ decision to resign was not the result of any disagreement on any matter relating to its operations, policies or practices. The report is signed by Chief Financial Officer Brian Thrasher as the duly authorized officer.
Terrestrial Energy Inc. appointed Kathryn McCarthy to its Board of Directors, effective July 22, 2026. She brings decades of leadership in nuclear science and technology from Oak Ridge National Laboratory, the US ITER Project Office, Canadian Nuclear Laboratories and Idaho National Laboratory.
McCarthy will receive compensation under the existing non-employee director policy and has signed the standard indemnification agreement. The company stated there are no related-party arrangements or reportable transactions involving her. On July 28, 2026, Terrestrial Energy announced her appointment and that it will report second quarter 2026 earnings before market open on August 11, 2026, followed by an investor conference call at 8:30 a.m. Eastern Time.
Terrestrial Energy Inc. director Kathryn Ann McCarthy received a grant of 2049 Restricted Stock Units on 2026-07-23 under the Terrestrial Energy Inc. 2025 Equity Incentive Plan. Each unit represents a contingent right to acquire one share of Common Stock and vests in full on December 31, 2026, subject to her continued service. Following this award, she directly holds 2049 restricted stock units.
Terrestrial Energy Inc. has a new Form 3 on file for director Kathryn Ann McCarthy. The Form 3 identifies her as a director, not an officer and not a ten percent owner. It does not report any insider transactions or any securities currently held as beneficially owned.
Terrestrial Energy Inc. made an investor presentation available on July 21, 2026 for use in general corporate and investor communications. The presentation is posted on the company’s investor relations website and furnished as Exhibit 99.1 under a Regulation FD disclosure. The material is furnished and not deemed “filed” for purposes of Section 18 of the Exchange Act, and is not incorporated by reference into other Securities Act or Exchange Act filings unless specifically referenced. The company’s Common Stock trades on Nasdaq under IMSR, and its Redeemable Warrants trade under IMSRW, each whole warrant exercisable for one share of Common Stock at $11.50 per share.
Terrestrial Energy Inc. reported an upcoming executive leadership change. The employment of Steven Millsap, who serves as General Counsel, Secretary and Chief Compliance Officer, will be ending effective September 12, 2026. This change affects the company’s top legal and compliance functions. Terrestrial Energy is incorporated in Delaware, and its common stock and redeemable warrants trade on The Nasdaq Stock Market under the symbols IMSR and IMSRW, respectively.
Terrestrial Energy Inc. reported the results of its 2026 Annual Meeting of Stockholders held on June 11, 2026. Stockholders elected three Class I directors—Frederick Buckman, William Johnson, and Hugh MacDiarmid—to three-year terms, each receiving about 56.7 million votes in favor and roughly 0.3 million withheld, with 12.7 million broker non-votes.
Stockholders also ratified UHY LLP as the independent registered public accounting firm for the fiscal year ending December 31, 2026, with 69,103,315 votes for, 400,853 against, and 165,166 abstentions.
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.