# Terrestrial Energy Inc.: Form S-1/A, filed Dec 22, 2025

- Company: [Terrestrial Energy Inc.](/companies/imsr.md) (CIK 2019804)
- Form: S-1/A
- Filed: 2025-12-22
- Accepted by EDGAR: Dec 23, 2025, 11:40 ET
- Period: not reported
- Accession: 0001104659-25-123776
- Inline XBRL: yes
- Main document: https://www.sec.gov/Archives/edgar/data/2019804/000110465925123776/tmb-20250930xs1a.htm
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/2019804/000110465925123776/

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/2019804/000110465925123776/tmb-20250930xs1a.htm

Filed Dec 22, 2025.
Source: SEC EDGAR, the filing index for accession 0001104659-25-123776. Last ingested by Listed: Oct 30, 2026, 09:18 ET. No prices; not investment advice.