| The Hongkong Electric Co., Ltd. | 100.00% | CKI Spark Holdings No. One Ltd. | 54.76% |
| CKI Spark Holdings No. Two Ltd. | 54.76% | Huaneng Hongkong Electric Dali Wind Power Co., Ltd. | 45.00% |
| Ratchaburi Power Co., Ltd. | 25.00% | Northern Gas Networks Holdings Ltd. | 41.29% |
| Wellington Electricity Distribution Network Holdings Ltd. | 50.00% | Wales & West Gas Networks (Holdings) Ltd. | 30.00% |
| HKELECTRIC-SS(02638) | 33.37% | | |