Exhibit 21.1
| Subsidiary | Jurisdiction of formation | |
| Terrestrial Energy, Inc. | Delaware | |
| Terrestrial Energy USA, Inc. | Delaware | |
| Terrestrial Energy Canada (Call) Inc. | Ontario, Canada | |
| Terrestrial Energy Canada (Exchange) Inc. | Ontario, Canada | |
| Terrestrial Energy (Ontario) Inc. | Ontario, Canada | |
| Terrestrial Energy Limited | England and Wales | |
| Terrestrial Energy Canada Inc. | Alberta, Canada |