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Reporting owner

Matthews Shawn

Reporting owner CIK 0001855118 · Director

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These transactions appear in filings associated with this reporting owner. Jointly reported quantities and amounts are unallocated; they are not this owner's individual purchases or total holdings. Names and roles reflect the relevant filing, and a reporting owner may be a person or an organization.

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Transaction timeline

Who reported an acquisition, and when the transaction occurred.

Reported acquisitions by transaction dateEach row is a reporting owner. Select a marker to open its transaction details. Jointly reported transactions appear for each associated reporting owner, without dividing quantities or amounts.Matthews ShawnMatthews ShawnHCM Investor Holdings II, LLCHCM Investor Holdings II,…Matthews Shawn · December 18, 2025 · Stock award · Restricted Stock UnitsMatthews Shawn · December 18, 2025 · Stock award · Restricted Stock UnitsMatthews Shawn · October 28, 2025 · Other acquisition · Common Stock, par value $0.0001 per shareHCM Investor Holdings II, LLC · October 28, 2025 · Other acquisition · Common Stock, par value $0.0001 per shareMatthews Shawn · October 28, 2025 · Other acquisition · Common Stock, par value $0.0001 per shareHCM Investor Holdings II, LLC · October 28, 2025 · Other acquisition · Common Stock, par value $0.0001 per shareOct 28, 2025Dec 18, 2025
PurchaseStock awardGift receivedExercise / conversionConversionOther acquisition

4 dated transactions · 2 of 2 reporting owners shown. Select one owner to focus the chart.

View timeline as a table
Transaction dateCompany / securityReporting ownersAcquisition type
Dec 18, 2025Terrestrial Energy Inc. /DE/Restricted Stock UnitsMatthews ShawnStock award
Dec 18, 2025Terrestrial Energy Inc. /DE/Restricted Stock UnitsMatthews ShawnStock award
Oct 28, 2025Terrestrial Energy Inc. /DE/Common Stock, par value $0.0001 per shareMatthews Shawn · HCM Investor Holdings II, LLCOther acquisition
Oct 28, 2025Terrestrial Energy Inc. /DE/Common Stock, par value $0.0001 per shareMatthews Shawn · HCM Investor Holdings II, LLCOther acquisition

Only transactions on this page are shown. Date windows end on the latest transaction date in this sample. Joint filings may appear on more than one row. Sales are not included. Share-price charts use a separate data source.

Transactions in associated filings

Reported insider acquisitions, ordered by filing date, newest first. Currency is shown only when reported.
Filed / transactedCompanyReporting ownersType / securityQuantityPrice / reference valueDetails
Trade: Terrestrial Energy Inc. /DE/IMSR · IMSRW · company listingsStock awardRestricted Stock UnitsDerivative security · Code A7350Value: 0Currency not specifiedView ↗
Trade: Terrestrial Energy Inc. /DE/IMSR · IMSRW · company listingsStock awardRestricted Stock UnitsDerivative security · Code A4,1900Value: 0Currency not specifiedView ↗
Trade: Terrestrial Energy Inc. /DE/IMSR · IMSRW · company listings
HCM Investor Holdings II, LLCFormer 10% owner
Joint filing · amounts unallocated		Other acquisitionCommon Stock, par value $0.0001 per shareNon-derivative security · Code J533,514Not reported *Value: Not reportedCurrency not specifiedView ↗
Trade: Terrestrial Energy Inc. /DE/IMSR · IMSRW · company listings
HCM Investor Holdings II, LLCFormer 10% owner
Joint filing · amounts unallocated		Other acquisitionCommon Stock, par value $0.0001 per shareNon-derivative security · Code J5,675,000Not reported *Value: Not reportedCurrency not specifiedView ↗