Terrestrial Energy Inc. /DE/ SEC filings

Filings

Every filing, newest first. MAJOR and NOTABLE filings lead the app's feed; ROUTINE ones are kept here.

1. ROUTINE4Terrestrial Energy Inc. /DE/IMSRW3d

   Terrestrial Energy Inc. reports ownership change

   • Pardee Charles G acquired 7,500 shares on 10/14/2026
   • Shares beneficially owned: 14,258
   • Price per share: $2.95

   Charles G Pardee, reporting

2. ROUTINE4Terrestrial Energy Inc. /DE/IMSRW5d

   Irish Simon filed Form 4 on 2026-10-14.

   • Reported ownership of 2,312,834 shares
   • Indirect ownership through LLC: 2,818,520 shares
   • Indirect ownership through IRA: 52,255 shares

   Simon Irish, reporting

3. ROUTINE4Terrestrial Energy Inc. /DE/IMSRW5d

   Terrestrial Energy Inc. reports ownership changes

   • Fred Buckman acquired 12,000 shares on 10/09/2026
   • Buckman owns 18,669 shares directly
   • Buckman holds 14,930 shares through a trust

   Frederick W Buckman, reporting

4. ROUTINE424B3Terrestrial Energy Inc. /DE/IMSRWAug 14

   Securities offering

5. NOTABLE10-QTerrestrial Energy Inc. /DE/IMSRWAug 11

   Quarterly report

6. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWAug 11

   Current report

7. ROUTINE4Terrestrial Energy Inc. /DE/IMSRWJul 31

   2 insider filings

   Pamela Beth Cowan, insider filing for IMSRW

   Show all 2

   • 4Insider filing for IMSRWJul 31
   • 3New insider at IMSRWJul 31

   Pamela Beth Cowan, reporting

8. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJul 31

   Current report

9. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJul 28

   Current report

10. ROUTINE4Terrestrial Energy Inc. /DE/IMSRWJul 27

    2 insider filings

    Kathryn Ann McCarthy, insider filing for IMSRW

    Show all 2

    • 4Insider filing for IMSRWJul 27
    • 3New insider at IMSRWJul 27

    Kathryn Ann McCarthy, reporting

11. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJul 21

    Current report

12. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJul 17

    Current report

13. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJun 12

    Current report

14. ROUTINEEFFECTTerrestrial Energy Inc. /DE/IMSRWJun 12

    Registration declared effective

15. ROUTINEPOS AMTerrestrial Energy Inc. /DE/IMSRWJun 5

    POS AM filing

16. ROUTINES-8Terrestrial Energy Inc. /DE/IMSRWMay 19

    Employee stock plan registration

17. ROUTINE424B3Terrestrial Energy Inc. /DE/IMSRWMay 14

    2 structured-note prospectuses

    Securities offering

    Show all 2

    • 424B3Securities offeringMay 14
    • 424B3Securities offeringMay 14
18. NOTABLE10-QTerrestrial Energy Inc. /DE/IMSRWMay 14

    Quarterly report

19. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWMay 14

    Current report

20. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWMay 8

    Current report

21. ROUTINEARSTerrestrial Energy Inc. /DE/IMSRWApr 29

    Annual report to shareholders

22. ROUTINEDEFA14ATerrestrial Energy Inc. /DE/IMSRWApr 29

    Additional proxy materials

23. ROUTINEDEF 14ATerrestrial Energy Inc. /DE/IMSRWApr 29

    Proxy statement

24. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWApr 16

    Current report

25. ROUTINE4Terrestrial Energy Inc. /DE/IMSRWApr 14

    4 insider filings

    Steven M. Millsap, insider filing for IMSRW

    Show all 4

    • 4Insider filing for IMSRWApr 14
    • 4Insider filing for IMSRWApr 14
    • 4Insider filing for IMSRWApr 14
    • 4Insider filing for IMSRWApr 14

    Steven M. Millsap, reporting

26. ROUTINEDTerrestrial Energy Inc. /DE/IMSRWMar 31

    Private placement notice

27. ROUTINE424B3Terrestrial Energy Inc. /DE/IMSRWMar 30

    2 structured-note prospectuses

    Securities offering

    Show all 2

    • 424B3Securities offeringMar 30
    • 424B3Securities offeringMar 30
28. ROUTINEPOS EXTerrestrial Energy Inc. /DE/IMSRWMar 30

    POS EX filing

29. ROUTINEPOS EXTerrestrial Energy Inc. /DE/IMSRWMar 30

    POS EX filing

30. NOTABLE10-KTerrestrial Energy Inc. /DE/IMSRWMar 30

    Annual report

31. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWMar 30

    Current report

32. ROUTINE3/ATerrestrial Energy Inc. /DE/IMSRWFeb 17

    Roberto Marco Sella, new insider at IMSRW (amended)

    Roberto Marco Sella, reporting

33. ROUTINESCHEDULE 13G/ATerrestrial Energy Inc. /DE/IMSRWFeb 17

    Ownership stake disclosure by CITADEL ADVISORS LLC (amended)

    CITADEL ADVISORS LLC, filed by

34. ROUTINE8-KTerrestrial Energy Inc. /DE/IMSRWJan 29

    Current report

35. ROUTINESCHEDULE 13GTerrestrial Energy Inc. /DE/IMSRWJan 22

    Ownership stake disclosure by Roberto Marco Sella

    Roberto Marco Sella, filed by

36. ROUTINE3Terrestrial Energy Inc. /DE/IMSRWJan 22

    Roberto Marco Sella, new insider at IMSRW

    Roberto Marco Sella, reporting

37. ROUTINE4/ATerrestrial Energy Inc. /DE/IMSRWJan 9

    William D Johnson, insider filing for IMSRW (amended)

    William D Johnson, reporting

38. ROUTINE424B3Terrestrial Energy Inc. /DE/IMSRWJan 5

    Securities offering

39. ROUTINES-8Terrestrial Energy Inc. /DE/IMSRWJan 5

    Employee stock plan registration

40. ROUTINE424B3Terrestrial Energy Inc. /DE/IMSRWDec 30, 2025

    Securities offering

41. ROUTINEEFFECTTerrestrial Energy Inc. /DE/IMSRWDec 29, 2025

    Registration declared effective

42. ROUTINES-1/ATerrestrial Energy Inc. /DE/IMSRWDec 23, 2025

    Securities offering (amended)

43. ROUTINE4Terrestrial Energy Inc. /DE/IMSRWDec 22, 2025

    Frederick W Buckman, insider filing for IMSRW

    Frederick W Buckman, reporting

Older filings on EDGAR