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Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2024
Basis of Presentation |
Summary of principal subsidiaries of the Company, their activities, and their geographic locations | These consolidated financial statements include the financial statements of the Company and its subsidiaries. The principal subsidiaries of the Company, their activities, and their geographic locations as at December 31, 2024, were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Proportion of
​ | ​ | ​ | ​ | ​ | ​ | Interest Held
Subsidiary(1) | ​ | Principal Activity | ​ | Location | ​ | by the Company
DeepGreen Engineering Pte. Ltd. |  | Mineral exploration |  | Singapore |  | 100%
DeepGreen Metals ULC |  | Mineral exploration |  | Canada |  | 100%
The Metals Company USA, LLC |  | Holding Company |  | USA |  | 100%
DeepGreen TOML Holding 1 Ltd. |  | Holding Company |  | British Virgin Islands |  | 100%
DeepGreen TOML Holding 2 Ltd. |  | Holding Company |  | British Virgin Islands |  | 100%
DeepGreen TOML Singapore Ltd. |  | Mineral exploration |  | Singapore |  | 100%
Koloa Moana Resources Ltd. |  | Holding Company |  | Canada |  | 100%
Nauru Ocean Resources Inc. |  | Mineral exploration |  | Republic of Nauru |  | 100%
Offshore Minerals Pty. Ltd. |  | Mineral exploration |  | Australia |  | 100%
The Metals Company Australia Pty Ltd |  | Holding Company |  | Australia |  | 100%
TMC The Metals Company UK Limited |  | Holding Company |  | United Kingdom |  | 100%
Tonga Offshore Mining Limited |  | Mineral exploration |  | Kingdom of Tonga |  | 100%
Seafloor Mineral Ventures (2) | ​ | Mineral exploration | ​ | Indonesia | ​ | 100%
| (1) | The Company’s wholly owned subsidiaries Nauru Education and Training Foundation Inc. and Nauru Health and Foundation Inc. were voluntarily dissolved on June 30, 2024.
| (2) | PT Seafloor Mineral Ventures was incorporated on May 17, 2024.

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- Definition The tabular disclosure of principal subsidiaries of the Company, their activities, and their geographic locations. + References No definition available. + Details
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