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 |
|---|---|---|---|
| POS AM | Filing | Nov 3, 2026 | — |
| S-3 | Shelf registration | Nov 3, 2026 | — |
| S-3 | Shelf registration | Nov 3, 2026 | — |
| 424B3 | Prospectus | Aug 14, 2026 | — |
| POS AM | Filing | Jun 5, 2026 | — |
| S-8 | Employee stock plan registration | May 19, 2026 | — |
| 424B3 | Prospectus | May 14, 2026 | — |
| 424B3 | Prospectus | May 14, 2026 | — |
| 424B3 | Prospectus | Mar 30, 2026 | — |
| 424B3 | Prospectus | Mar 30, 2026 | — |
| 424B3 | Prospectus | Jan 5, 2026 | — |
| S-8 | Employee stock plan registration | Jan 5, 2026 | — |
| 424B3 | Prospectus | Dec 30, 2025 | — |
| S-1/A | Amended registration statement | Dec 22, 2025 | — |
| S-1 | Registration statement | Nov 26, 2025 | — |
| 424B3 | Prospectus | Sep 26, 2025 | — |
| S-4/A | Registration statement | Sep 23, 2025 | — |
| S-4/A | Registration statement | Sep 16, 2025 | — |
| S-4/A | Registration statement | Sep 4, 2025 | — |
| S-4/A | Registration statement | Aug 15, 2025 | — |
| S-4 | Registration for a merger or exchange | Jul 17, 2025 | — |
| 424B4 | Prospectus | Aug 16, 2024 | — |
| S-1/A | Amended registration statement | Aug 2, 2024 | — |
| S-1/A | Amended registration statement | Jul 19, 2024 | — |
| S-1/A | Amended registration statement | Jul 5, 2024 | — |
| S-1 | Registration statement | Jun 18, 2024 | — |
Showing 26 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.