| BEIDOU ISOTOPE NUCLEAR TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| CHINA NUCLEAR FUND LIMITED | Private company limited by shares | Dissolved |
| China Ocean Nuclear Group Limited | Private company limited by shares | Live |
| China Nuclear Integrity International Limited | Private company limited by shares | Live |
| CHINA NUCLEAR INDEX INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| CHINA NUCLEAR POWER EPC LIMITED | Private company limited by shares | Live |
| CHINA NUCLEAR POWER LIMITED | Private company limited by shares | Live |
| NUCLEAR RAY ELECTRON (HK) LIMITED | Private company limited by shares | Dissolved |
| China Nuclear Energy S&T Limited | Private company limited by shares | Dissolved |
| CHINA NUCLEAR ENERGY GROUP LIMITED | Private company limited by shares | Live |
| NUCLEAR ENERGY (HK) INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| China Nuclear Energy Construction Limited | Private company limited by shares | Dissolved |
| HK NUCLEAR ENERGY ENVIRONMENT PROTECTION TECHNOLOGY EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| ZHONGSHUAI NUCLEAR ENERGY TECHNOLOGY (HK) COMPANY LIMITED | Private company limited by shares | Live |
| NUCLEAR ENGINEERING LIMITED | Private company limited by shares | Live |
| KURY CHINA NUCLEAR ENGINEERING LIMITED | Private company limited by shares | Live |
| NUCLEAR CONSTRUCTION AND ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Nuclear Fresh Limited | | Live |
| NUCLEAR FUND LIMITED | Private company limited by shares | Dissolved |
| Nuclear Green Solutions Limited | Private company limited by shares | Dissolved |
| China Nuclear (HK) Resources Group Limited | Private company limited by shares | Live |
| Guangdong Nuclear Service Co., Limited | Private company limited by shares | Dissolved |
| NUCLEAR COMPANY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG NUCLEAR EDUCATION CENTRE LIMITED | Company limited by guarantee | Dissolved |
| Hong Kong Nuclear Fusion Limited | | Live |
| HONG KONG NUCLEAR INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG NUCLEAR TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA NUCLEAR INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| CLP Nuclear Business Liaison Limited | Private company limited by shares | Live |
| Chengdu Nuclear 857 New Materials Co., Limited | Private company limited by shares | Live |
| China Nuclear Medical Equipment Company Limited | Private company limited by shares | Live |
| China Nuclear Urban Construction (Overseas) Limited | Private company limited by shares | Live |
| CLP Nuclear Power Company Limited | Private company limited by shares | Live |
| NUCLEAR TRACE PROMOS LIMITED | Private company limited by shares | Live |
| NUCLEAR RESOURCES H.K. LIMITED | Private company limited by shares | Dissolved |
| CENTURY NUCLEAR SERVICE, LIMITED | Private company limited by shares | Dissolved |
| SinoRus Nuclear Power Corporation Limited | Private company limited by shares | Live |
| NUCLEAR TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| W&H NUCLEAR TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CHINA NUCLEAR TECHNOLOGY APPLICATION LIMITED | Private company limited by shares | Live |
| Nuclear Science and Technology Co., Limited | | Live |
| NUCLEAR TECHNOLOGY H.K. LIMITED | Private company limited by shares | Dissolved |
| Nuclear Intelligence Technology Limited | | Live |
| NUCLEAR POWER TECHNOLOGY AND SERVICE LIMITED | | Live |
| NUCLEAR TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| CLP Nuclear Power (Yangjiang) Limited | Private company limited by shares | Live |
| NUCLEARSOFT LIMITED | Private company limited by shares | Live |
| NUCLEARSOFT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| NUCLEARSOFT TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |