Terrestrial Energy Inc. /DE/ SEC filings IMSR
Terrestrial Energy Inc. /DE/ has 186 filings in SEC EDGAR's recent list, going back to Apr 26, 2024. Its latest annual report, Form ARS, was filed on Apr 29, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Jun 11, 2026 | — |
| D | Filing | Mar 31, 2026 | — |
| POS EX | Filing | Mar 30, 2026 | — |
| POS EX | Filing | Mar 30, 2026 | — |
| EFFECT | Filing | Dec 23, 2025 | — |
| CORRESP | Letter to the SEC | Dec 23, 2025 | — |
| 425 | Current report | Oct 22, 2025 | — |
| 425 | Form 425 | Oct 2, 2025 | — |
| 425 | Current report | Sep 29, 2025 | — |
| EFFECT | Filing | Sep 26, 2025 | — |
| CORRESP | Letter to the SEC | Sep 24, 2025 | — |
| CORRESP | Letter to the SEC | Sep 16, 2025 | — |
| UPLOAD | Letter from the SEC | Sep 12, 2025 | — |
| 425 | Form 425 | Sep 4, 2025 | — |
| CORRESP | Letter to the SEC | Sep 3, 2025 | — |
| UPLOAD | Letter from the SEC | Aug 28, 2025 | — |
| CORRESP | Letter to the SEC | Aug 15, 2025 | — |
| 425 | Form 425 | Aug 15, 2025 | — |
| 425 | Form 425 | Aug 6, 2025 | — |
| UPLOAD | Letter from the SEC | Jul 30, 2025 | — |
| CORRESP | Letter to the SEC | Jul 17, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 26, 2025 | — |
| 425 | Form 425 | Jun 24, 2025 | — |
| 425 | Form 425 | Jun 24, 2025 | — |
| DRS | Filing | May 30, 2025 | — |
| 425 | Form 425 | May 27, 2025 | — |
| NT 10-Q | Notification of late filing | May 16, 2025 | Mar 31, 2025 |
| 425 | Form 425 | Mar 28, 2025 | — |
| 425 | Form 425 | Mar 26, 2025 | — |
| 425 | Current report | Mar 26, 2025 | — |
| EFFECT | Filing | Aug 15, 2024 | — |
| CERT | Filing | Aug 15, 2024 | — |
| 8-A12B | Filing | Aug 15, 2024 | — |
| CORRESP | Letter to the SEC | Aug 13, 2024 | — |
| CORRESP | Letter to the SEC | Aug 13, 2024 | — |
| CORRESP | Letter to the SEC | Aug 2, 2024 | — |
| UPLOAD | Letter from the SEC | Jul 31, 2024 | — |
| CORRESP | Letter to the SEC | Jul 19, 2024 | — |
| UPLOAD | Letter from the SEC | Jul 10, 2024 | — |
| UPLOAD | Letter from the SEC | May 24, 2024 | — |
| DRS | Filing | Apr 26, 2024 | — |
Showing 41 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Fabricated Plate Work (Boiler Shops) (SIC 3443)
- Listed as
- IMSR (Nasdaq), IMSRW (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Charlotte, NC
- SEC filer status
- , Emerging growth company
- SEC CIK
- 2019804
- Former names
- HCM II Acquisition Corp. (until Oct 29, 2025)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.