Terrestrial Energy Inc. /DE/ — All Filings
139 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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10-K
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10-Q/A
3
3/A
4
4/A
424B3
424B4
425
8-A12B
8-K
8-K/A
CERT
CORRESP
DEFA14A
DRS
EFFECT
NT 10-Q
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S-1/A
S-4
S-4/A
S-8
SC 13G
SCHEDULE 13D
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 3/A | — | 0001193805-26-000145 | Feb 17, 2026 | Oct 29, 2025 |
| SCHEDULE 13G/A | — | 0001104659-26-016540 | Feb 17, 2026 | — |
| 8-K | 8-K | 0001104659-26-007880 | Jan 29, 2026 | — |
| SCHEDULE 13G | — | 0001193805-26-000054 | Jan 22, 2026 | — |
| 3 | — | 0001193805-26-000053 | Jan 22, 2026 | Oct 29, 2025 |
| 4/A | AMENDED STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-26-000002 | Jan 9, 2026 | Dec 18, 2025 |
| 424B3 | 424B3 | 0001104659-26-000702 | Jan 5, 2026 | — |
| S-8 | FORM S-8 | 0001104659-26-000287 | Jan 5, 2026 | — |
| 424B3 | 424B3 | 0001104659-25-125280 | Dec 30, 2025 | — |
| EFFECT | — | 9999999995-25-003908 | Dec 23, 2025 | — |
| S-1/A | S-1/A | 0001104659-25-123776 | Dec 22, 2025 | — |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000045 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000043 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000041 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000039 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000036 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000950138-25-000034 | Dec 22, 2025 | Dec 18, 2025 |
| 4 | — | 0001213900-25-124579 | Dec 22, 2025 | Dec 18, 2025 |
| S-1 | S-1 | 0001104659-25-116127 | Nov 26, 2025 | — |
| 8-K | FORM 8-K | 0001104659-25-115406 | Nov 24, 2025 | Nov 21, 2025 |
| 10-Q/A | FORM 10-Q/A | 0001104659-25-114702 | Nov 21, 2025 | Sep 30, 2025 |
| 10-Q | QUARTERLY REPORT | 0001213900-25-111005 | Nov 14, 2025 | Sep 30, 2025 |
| 8-K/A | FORM 8-K/A | 0001104659-25-112689 | Nov 14, 2025 | Oct 28, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001213900-25-110214 | Nov 13, 2025 | Nov 6, 2025 |
| SCHEDULE 13G/A | — | 0001193125-25-276403 | Nov 12, 2025 | — |
| SCHEDULE 13G/A | — | 0001104659-25-109826 | Nov 12, 2025 | — |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108635 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108634 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108633 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108631 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108630 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108628 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108627 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108626 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108624 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108622 | Nov 7, 2025 | Oct 28, 2025 |
| 3 | OWNERSHIP DOCUMENT | 0001104659-25-108621 | Nov 7, 2025 | Oct 28, 2025 |
| SCHEDULE 13D | — | 0001104659-25-106326 | Nov 4, 2025 | — |
| SCHEDULE 13D | — | 0001104659-25-106325 | Nov 4, 2025 | — |
| 8-K | CURRENT REPORT | 0001213900-25-105304 | Nov 3, 2025 | Oct 28, 2025 |
| 4 | — | 0001213900-25-104334 | Oct 30, 2025 | Oct 28, 2025 |
| 4 | — | 0001213900-25-104333 | Oct 30, 2025 | Oct 28, 2025 |
| 4 | — | 0001213900-25-104332 | Oct 30, 2025 | Oct 28, 2025 |
| 4 | — | 0001213900-25-104331 | Oct 30, 2025 | Oct 28, 2025 |
| 4 | — | 0001213900-25-104323 | Oct 30, 2025 | Oct 28, 2025 |
| 8-K | CURRENT REPORT | 0001213900-25-103554 | Oct 29, 2025 | Oct 23, 2025 |
| 425 | CURRENT REPORT | 0001213900-25-101317 | Oct 22, 2025 | — |
| 8-K | CURRENT REPORT | 0001213900-25-101312 | Oct 22, 2025 | — |
| 425 | FORM 425 | 0001213900-25-094894 | Oct 2, 2025 | — |
| SCHEDULE 13G | — | 0001104659-25-095148 | Sep 30, 2025 | — |