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ORGANIZATION AND BASIS OF PRESENTATION (Tables) | 12 Months Ended
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Dec. 31, 2022
ORGANIZATION AND BASIS OF PRESENTATION |
Summary of principal subsidiaries | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Percentage of legal | ​ | ​
​ | ​ | Date of | ​ | Place of | ​ | ownership | ​ | ​
Entity |  | incorporation |  | incorporation |  | by the Company |  | Principal activities
Adagene (Hong Kong) Limited | ​ | December 12, 2011 |  | Hong Kong |  | 100 | % | Investment holding
Adagene Incorporated | ​ | September 20, 2017 |  | The United States of America |  | 100 | % | Research and development of innovative medicines
Adagene (Suzhou) Limited | ​ | February 28, 2012 |  | The People’s Republic of China (“PRC” or “China”) |  | 100 | % | Research and development of innovative medicines
Adagene Australia PTY Ltd. | ​ | May 30, 2018 | ​ | Australia | ​ | 100 | % | Research and development of innovative medicines
Adagene PTE. Ltd. | ​ | March 27, 2020 | ​ | Singapore | ​ | 100 | % | Research and development of innovative medicines
Adagene AG | ​ | August 31, 2020 |  | Switzerland |  | 100 | % | Research and development of innovative medicines
Adagene Project C1 PTE. Ltd. | ​ | March 25, 2022 |  | Singapore |  | 100 | % | Research and development of innovative medicines

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