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    SEC Form D filed by Terrestrial Energy Inc.

    3/31/26 9:28:05 AM ET
    $IMSR
    Get the next $IMSR alert in real time by email
    Form D
    FORM D
    Notice of Exempt Offering of Securities

    UNITED STATES SECURITIES
    AND EXCHANGE COMMISSION
    Washington, D.C.

    OMB APPROVAL
    OMB Number: 3235-0076
    Estimated Average burden hours per response: 4.0
    1. Issuer's Identity
    CIK (Filer ID Number)Previous Name(s)Checkbox not checkedNoneEntity Type
    0002019804
    HCM II Acquisition Corp.
    Radio button checkedCorporation
    Radio button not checked Limited Partnership
    Radio button not checked Limited Liability Company
    Radio button not checked General Partnership
    Radio button not checked Business Trust
    Radio button not checkedOther 
    Name of Issuer
     Terrestrial Energy Inc. /DE/
    Jurisdiction of Incorporation/Organization
    DELAWARE 
    Year of Incorporation/Organization
    Radio button not checkedOver Five Years Ago
    Radio button checkedWithin Last Five Years (Specify Year)
    2025
    Radio button not checkedYet to Be Formed
     
      
      
     
    2. Principal Place of Business and Contact Information
    Name of Issuer
     Terrestrial Energy Inc. /DE/
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100
     
    CityState/Province/CountryZIP/Postal CodePhone No. of Issuer
     CHARLOTTE
     NORTH CAROLINA
     
     28217
     646-687-8212 




    3. Related Persons

    Last NameFirst NameMiddle Name
    Irish
    Simon
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox checkedExecutive OfficerCheckbox not checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    LeBlanc
    David
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Thrasher
    Brian
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox checkedExecutive OfficerCheckbox not checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    MacDiarmid
    Hugh
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Hill
    David
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Buckman. Sr.
    Frederick
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Johnson
    William
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Pardee
    Charles
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Matthews
    Shawn
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     



    Last NameFirst NameMiddle Name
    Jones
    Robert
    Street Address 1Street Address 2
     2730 W. TYVOLA ROAD, SUITE 100 
     
    CityState/Province/CountryZIP/Postal Code
     Charlotte
     NORTH CAROLINA
     28217
     
    Relationship:Checkbox not checkedExecutive OfficerCheckbox checkedDirectorCheckbox not checkedPromoter
    Clarification of Response (if Necessary)
     





    4. Industry Group
     Radio button not checkedAgriculture
    Banking & Financial Services
     Radio button not checked Commercial Banking
     Radio button not checked Insurance
     Radio button not checkedInvesting
     Radio button not checked Investment Banking
     Radio button not checked Pooled Investment Fund

     Radio button not checkedOther Banking & Financial Services
    Radio button not checked Business Services
    Energy
     Radio button not checked Coal Mining
     Radio button not checked Electric Utilities
     Radio button not checked Energy Conservation
     Radio button not checked Environmental Services
     Radio button not checked Oil & Gas
     Radio button checked Other Energy
    Health Care
     Radio button not checked Biotechnology
     Radio button not checked Health Insurance
     Radio button not checked Hospitals & Physicians
     Radio button not checked Pharmaceuticals
     Radio button not checked Other Health Care
       
       
       
      
    Radio button not checked Manufacturing
    Real Estate
     Radio button not checkedCommercial
     Radio button not checkedConstruction
     Radio button not checkedREITS & Finance
     Radio button not checkedResidential
    Radio button not checkedOther Real Estate
    Radio button not checked Retailing
    Radio button not checkedRestaurants
    Technology
    Radio button not checked Computers
    Radio button not checked Telecommunications
    Radio button not checked Other Technology
    Travel
    Radio button not checked Airlines & Airports
    Radio button not checked Lodging & Conventions
    Radio button not checked Tourism & Travel Services
    Radio button not checked Other Travel
    Radio button not checkedOther

      
       
    5. Issuer Size
    Revenue RangeAggregate Net Asset Value Range
    Radio button not checkedNo RevenuesRadio button not checked No Aggregate Net Asset Value
    Radio button not checked $1 - $1,000,000Radio button not checked$1 - $5,000,000
    Radio button not checked $1,000,001 - $5,000,000Radio button not checked $5,000,001 - $25,000,000
    Radio button not checked$5,000,001 - $25,000,000Radio button not checked $25,000,001 - $50,000,000
    Radio button not checked$25,000,001 - $100,000,000Radio button not checked $50,000,001 - $100,000,000
    Radio button not checked Over $100,000,000Radio button not checked Over $100,000,000
    Radio button checked Decline to Disclose Radio button not checkedDecline to Disclose
    Radio button not checked Not ApplicableRadio button not checked Not Applicable

     
    6. Federal Exemption(s) and Exclusion(s) Claimed (select all that apply)
    Checkbox not checkedRule 504(b)(1) (not (i), (ii)
    or (iii))
    Checkbox checkedRule 506(b)      
    Checkbox not checkedRule 504 (b)(1)(i) Checkbox not checkedRule 506(c)
    Checkbox not checkedRule 504 (b)(1)(ii) Checkbox not checkedSecurities Act Section 4(a)(5)
    Checkbox not checkedRule 504 (b)(1)(iii)Checkbox not checkedInvestment Company Act Section 3(c)
     
     

    7. Type of Filing
    Checkbox checked New Notice Date of First Sale 
    2026-03-19
    Checkbox not checked First Sale Yet to Occur
    Checkbox not checked Amendment


     
     
    8. Duration of Offering
    Does the Issuer intend this offering to last more than one year? Radio button not checked Yes Radio button checked No
     
     
    9. Type(s) of Securities Offered (select all that apply)
    Checkbox not checkedPooled Investment Fund InterestsCheckbox checkedEquity
    Checkbox not checkedTenant-in-Common Securities Checkbox not checkedDebt
    Checkbox not checkedMineral Property SecuritiesCheckbox not checkedOption, Warrant or Other Right to Acquire Another Security
    Checkbox not checkedSecurity to be Acquired Upon Exercise of Option, Warrant or Other Right to Acquire SecurityCheckbox not checkedOther (describe)
     
     
     
    10. Business Combination Transaction
    Is this offering being made in connection with a business combination transaction, such as a merger, acquisition or exchange offer? Radio button not checked Yes Radio button checked No
    Clarification of Response (if Necessary)
     
     
     
    11. Minimum Investment
    Minimum investment accepted from any outside investor$
     0
    USD

    12. Sales Compensation
    Recipient Recipient CRD NumberCheckbox not checkedNone
     
     
    (Associated) Broker or DealerCheckbox not checkedNone(Associated) Broker or Dealer CRD Number  Checkbox not checkedNone
     
     
    Street Address 1Street Address 2
     
     
    City State/Province/CountryZIP/Postal Code
     
     
     
    State(s) of Solicitation Checkbox not checkedAll States
     



    13. Offering and Sales Amounts
     
    Total Offering Amount $
    85320
    USDCheckbox not checkedIndefinite
    Total Amount Sold $
    85320
    USD
    Total Remaining to be Sold $
    0
    USDCheckbox not checkedIndefinite
    Clarification of Response (if Necessary)
      
     
    14. Investors

    Checkbox not checkedSelect if securities in the offering have been or may be sold to persons who do not qualify as accredited investors,
    Number of such non-accredited investors who already have invested in the offering
       
      Regardless of whether securities in the offering have been or may be sold to persons who do not qualify as accredited investors, enter the total number of investors who already have invested in the offering:
    1
     
    15. Sales Commissions & Finders’ Fees Expenses
    Provide separately the amounts of sales commissions and finders' fees expenses, if any. If the amount of an expenditure is not known, provide an estimate and check the box next to the amount.
    Sales Commissions$
    0
    USDCheckbox not checkedEstimate
    Finders' Fees$
    0
    USDCheckbox not checkedEstimate
    Clarification of Response (if Necessary)
     
     

    16. Use of Proceeds
    Provide the amount of the gross proceeds of the offering that has been or is proposed to be used for payments to any of the persons required to be named as executive officers, directors or promoters in response to Item 3 above. If the amount is unknown, provide an estimate and check the box next to the amount.
     $ 
    0
    USDCheckbox not checkedEstimate
    Clarification of Response (if Necessary)
     

    Signature and Submission
     
    Please verify the information you have entered and review the Terms of Submission below before signing and clicking SUBMIT below to file this notice.
    Terms of Submission 
     In submitting this notice, each Issuer named above is: 
     
    • Notifying the SEC and/or each State in which this notice is filed of the offering of securities described and undertaking to furnish them, upon written request, the information furnished to offerees.
    • Irrevocably appointing each of the Secretary of the SEC and, the Securities Administrator or other legally designated officer of the State in which the Issuer maintains its principal place of business and any State in which this notice is filed, as its agents for service of process, and agreeing that these persons may accept service on its behalf, of any notice, process or pleading, and further agreeing that such service may be made by registered or certified mail, in any Federal or state action, administrative proceeding, or arbitration brought against it in any place subject to the jurisdiction of the United States, if the action, proceeding or arbitration (a) arises out of any activity in connection with the offering of securities that is the subject of this notice, and (b) is founded, directly or indirectly, upon the provisions of:  (i) the Securities Act of 1933, the Securities Exchange Act of 1934, the Trust Indenture Act of 1939, the Investment Company Act of 1940, or the Investment Advisers Act of 1940, or any rule or regulation under any of these statutes, or (ii) the laws of the State in which the issuer maintains its principal place of business or any State in which this notice is filed.
    • Certifying that, if the issuer is claiming a Regulation D exemption for the offering, the issuer is not disqualified from relying on Rule 504 or Rule 506 for one of the reasons stated in Rule 504(b)(3) or Rule 506(d).
     
    Each Issuer identified above has read this notice, knows the contents to be true, and has duly caused this notice to be signed on its behalf by the undersigned duly authorized person.
    For signature, type in the signer's name or other letters or characters adopted or authorized as the signer's signature.
     
    IssuerSignatureName of SignerTitleDate
    Terrestrial Energy Inc. /DE//s/ Brian ThrasherBrian ThrasherChief Financial Officer2026-03-31




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