Welcome to our dedicated page for HCM II ACQUISITION SEC filings (Ticker: HONDU), 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.
The SEC filings page for HCM II Acquisition Corp. (HONDU) brings together the regulatory documents that describe its life cycle as a special purpose acquisition company and its transition through a business combination. HCM II Acquisition Corp. is characterized in its disclosures as a blank check company formed to effect a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses, with flexibility across sectors and a stated focus on established businesses of scale.
Key filings include registration statements related to its initial public offering of units on the Nasdaq Global Market, where each unit consisted of one Class A ordinary share and one-half of one redeemable warrant. These documents outline the structure of the units, the Class A ordinary shares, and the warrants, and describe how the securities are expected to trade under the symbols HONDU, HOND and HONDW.
Filings also cover the company’s business combination with Terrestrial Energy Inc. A Registration Statement on Form S-4 was declared effective by the SEC in connection with this transaction, registering securities to be issued in the combination and including a proxy statement/prospectus for HCM II shareholders. An 8-K filing later explains that the entity formerly known as HCM II Acquisition Corp. consummated the business combination with the entity formerly known as Terrestrial Energy Inc., with a merger subsidiary of HCM II merging into the legacy Terrestrial Energy entity.
That same 8-K identifies the post-combination registrant as Terrestrial Energy Inc., with common stock and redeemable warrants listed on the Nasdaq Stock Market under the symbols IMSR and IMSRW. It also discusses matters such as changes in the independent registered public accounting firm following the merger. Through these filings, readers can follow how the HONDU SPAC vehicle raised capital, structured its securities, and ultimately combined with Terrestrial Energy to form the publicly traded company under the IMSR and IMSRW symbols.
On Stock Titan, these SEC filings are paired with AI-powered summaries that explain the purpose and key points of documents such as registration statements and 8-K reports. Real-time updates from EDGAR, along with structured access to information about common stock and warrant terms, help users understand the regulatory history of HCM II Acquisition Corp. and its evolution into the Terrestrial Energy structure.
Terrestrial Energy Inc. files a Prospectus Supplement No. 2 to its Form S-4 prospectus supplementing that prospectus with information from its Form 10-K for the fiscal year ended December 31, 2025. The supplement covers up to 151,970,541 shares of common stock and 18,350,000 warrants and updates disclosures on the company’s business, technology, regulatory progress, commercialization pathway, financial history and project economics. The company reports 105,935,266 shares outstanding as of March 25, 2026, an aggregate market value of common shares held by non-affiliates of $191,475,000 as of June 30, 2025, and an accumulated deficit of $124.6 million as of December 31, 2025. The supplement incorporates material from Terrestrial Energy’s Form 10-K, including technology details for the IMSR Plant, regulatory milestones (CNSC Vendor Design Review completion), DOE selection for the TETRA pilot program, and estimated unit economics such as an LCOE of $69/MWh and LCOH of $8.60/MMBtu.
Terrestrial Energy Inc. files a prospectus supplement for a mixed offering registering 18,776,119 shares of common stock for a primary offering and a secondary resale of 18,792,599 shares, and 1,267,599 warrants to purchase common stock.
The supplement updates the December 30, 2025 prospectus with information from the company’s Form 10-K, including a stated 105,935,266 common shares outstanding as of March 25, 2026, recent fundraising, technology and regulatory milestones, and LCOE/LCOH cost estimates for the IMSR Plant.
Terrestrial Energy Inc. filed a Post-Effective Amendment No. 1 to its Form S-1 to furnish a consent from UHY LLP relating to the audited financial statements for the years ended December 31, 2025 and December 31, 2024.
The amendment is exhibit-only and states the Registration Statement was initially declared effective on December 23, 2025; the Consent and signature pages are being filed as of March 30, 2026.
Terrestrial Energy Inc. filed a Post-Effective Amendment No. 1 to its Form S-4 to furnish a consent from UHY LLP relating to the auditor's report for the financial statements for the years ended December 31, 2025 and December 31, 2024. The amendment is exhibit-only and updates Exhibit 23.1; the proxy statement/prospectus and the remainder of Part II remain unchanged.
Terrestrial Energy Inc. files its annual report describing its transition from SPAC HCM II Acquisition Corp. into a holding company focused on commercializing its Integral Molten Salt Reactor (IMSR) advanced nuclear plant through subsidiary Terrestrial Energy Development Inc.
The company targets first IMSR commercial operations around 2034, aiming to serve a serviceable addressable market it estimates at over $1.4 trillion in OECD countries, rising to $1.9 trillion by 2050. Its IMSR Plant is designed to supply 822 MW (net) thermal and 390 MW (net) electricity at 585°C with about 44% net efficiency, a 56‑year operating life, and seven‑year core replacement cycles.
Terrestrial Energy reports an accumulated deficit of $124.6 million as of December 31, 2025 and notes additional capital raises of $36.7 million since December 31, 2024 plus $292 million of gross proceeds from its business combination. It highlights regulatory progress, including completion of the Canadian Vendor Design Review with “no fundamental barriers to licensing” and ongoing U.S. NRC pre‑application work, as well as selection for a U.S. DOE advanced reactor pilot program and a pipeline of more than ten early‑stage IMSR projects.
Terrestrial Energy Inc. reported a larger net loss for 2025 while dramatically strengthening its balance sheet following a major capital raise and business combination. For the year ended December 31, 2025, the company posted a net loss of $28,016,641 versus $11,485,410 in 2024, with no revenue compared to $248,357 a year earlier, reflecting higher research and development and general and administrative spending.
Cash and cash equivalents rose to $97,164,391 from $3,021,795, and short-term investments reached $200,626,281, driven by financing activities including a completed business combination that raised approximately $292 million in gross proceeds. Total assets increased to $302,980,424, stockholders’ equity swung from a deficit of $(13,490,552) to positive equity of $295,406,242, and weighted-average basic and diluted loss per share was $(0.39) on 71.6 million shares. The company highlights regulatory, fuel supply and project development progress for its Integral Molten Salt Reactor and plans to advance clearly defined milestones into 2026.
Terrestrial Energy Inc. (IMSR) 10% owner Roberto Marco Sella has filed an amended Form 3 to update how his existing stakes are described, without reporting any new purchases or sales. The filing lists holdings of common stock and warrants as of October 29, 2025, including both direct and indirect positions.
Directly, he reports 180,316 shares of common stock and 539,117 warrants to purchase common stock. Indirectly, he reports 12,244,088 shares of common stock and multiple warrant positions held through joint ownership with his spouse, a 2012 family trust where he serves as trustee, and the LL Charitable Foundation where he is president. The amendment states it is made solely to correct footnote designations in the warrant table, indicating the change is administrative rather than economic.
Citadel affiliates and Kenneth Griffin report beneficial ownership in Terrestrial Energy Inc. They may be deemed to beneficially own a total of 2,303,796 common shares, representing 2.2% of the outstanding Shares as of December 15, 2025.
Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC each may be deemed to own 2,029,208 Shares, or 1.9% of the class. Citadel Securities LLC, Citadel Securities Group LP and Citadel Securities GP LLC each may be deemed to own 274,588 Shares, or 0.3% of the class.
The Reporting Persons state they share voting and dispositive power over these Shares and certify that the securities were not acquired and are not held for the purpose of changing or influencing control of Terrestrial Energy Inc.
Terrestrial Energy Inc. filed a current report to let investors know it has shared a new corporate update with shareholders. On January 29, 2026, the company issued a letter providing this update, which is attached to the filing as Exhibit 99.1 and incorporated by reference.
The report states that the shareholder letter and related information are being furnished under Regulation FD, meaning they are provided for fair disclosure but are not treated as filed for liability purposes under the Exchange Act or automatically included in other securities filings.
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.