Welcome to our dedicated page for Terrestrial Energy SEC filings (Ticker: IMSR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Terrestrial Energy Inc.'s SEC filings document its public-company reporting as a Nasdaq-listed developer of IMSR nuclear plant technology. Recent 8-K reports cover financial and operating results, shareholder communications, executive employment agreements, board changes, and Regulation FD disclosures.
The filing record also identifies the company's common stock under IMSR and redeemable warrants under IMSRW, each listed on Nasdaq, and reflects the capital structure established after the completed business combination. Proxy materials cover annual-meeting voting, director elections, executive compensation, governance practices, and other stockholder voting matters presented under SEC proxy rules.
Terrestrial Energy Inc. received a Schedule 13G filing disclosing that investor Roberto Sella, together with the Roberto M. Sella 2012 Family Trust and LL Charitable Foundation, holds a significant passive stake in the company. The filing reports that Sella beneficially owns 15,378,689 shares of common stock, representing 14.34% of the class, including shares held directly, jointly with his spouse, and through warrants. The Trust holds 1,538,319 shares (1.44% of the class), and the Foundation holds 653,334 shares (0.62% of the class). These positions arose when the reporting persons received Terrestrial Energy Inc. securities at the closing of an October 29, 2025 business combination, and they certify that the holdings are not for the purpose of changing or influencing control.
Terrestrial Energy Inc. insider Sella Roberto Marco, a more than 10% owner, filed an initial statement of beneficial ownership as of 10/29/2025, reflecting equity received at the closing of a business combination between the current Terrestrial Energy entity and its predecessor.
The filing reports 180,316 shares of common stock held directly, plus additional common shares held indirectly through joint ownership with his spouse, the Roberto M. Sella 2012 Family Trust and the LL Charitable Foundation, where he may have voting and dispositive power but disclaims beneficial ownership except to the extent of his pecuniary interest. It also lists several series of warrants to purchase common stock, both directly and through these related entities, with exercise prices of $2.24 per share and expirations on 07/31/2028.