| PLUG LIMITED | Private company limited by shares | Live |
| Plug The Sun Limited | Private company limited by shares | Live |
| AD PLUG LIMITED | | Live |
| HK ADCO OF SPARK PLUG CO., LIMITED | Private company limited by shares | Live |
| PLUG CLUB HK COMPANY LIMITED | Private company limited by shares | Live |
| Plug Communications Company Limited | Private company limited by shares | Dissolved |
| PLUG CONSULTING LIMITED | Private company limited by shares | Dissolved |
| PLUG DESIGN LIMITED | Private company limited by shares | Live |
| PLUG IN FAR EAST LIMITED | Private company limited by shares | Dissolved |
| PLUG IN FAR EAST LIMITED | Private company limited by shares | Dissolved |
| PLUG GAME LIMITED | | Live |
| HONG KONG GOLDEN SPARKING PLUG MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| Handy Plug Limited -The- | Private company limited by shares | Live |
| HIP HING CABLE & PLUG MANUFACTORY LIMITED | Private company limited by shares | Live |
| HIP SHING (H.K.) CABLE & PLUG PRODUCTS LIMITED | Private company limited by shares | Live |
| POWER PLUG BUSDUCT HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Japan Denso Spark Plug (Hong Kong) Co., Limited | Private company limited by shares | Live |
| PLUG MUSIC (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Plug The Impact Limited | | Live |
| PLUG ENTERTAINMENT MANAGEMENT LIMITED | Private company limited by shares | Live |
| SO PLUG MEDIA LIMITED | Private company limited by shares | Live |
| Plug Media Services Limited | Private company limited by shares | Live |
| Plug Power Asia Pacific Limited | Private company limited by shares | Live |
| PLUG AND PLAY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MINWA AUTO-PROTECTION (SMART PLUG) TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| SONIC PLUG INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Spark Plug Limited | Private company limited by shares | Live |
| TINY PLUG TECHNOLOGY LIMITED | Private company limited by shares | Live |
| China Spark Plug Testing and Identification Association Limited | Private company limited by shares | Live |
| PLUG (PACIFIC LEGEND UNITED GROUP) CO., LIMITED | Private company limited by shares | Live |
| WIRE & PLUG TECHNOLOGY LIMITED | Private company limited by shares | Live |
| TYEN YUAN PLUG COMPANY LIMITED | Private company limited by shares | Dissolved |
| ZHUZHOU TORCH SPARK PLUG CO., LIMITED | Private company limited by shares | Live |
| PLUGI PHARMACEUTICALS LIMITED | Private company limited by shares | Live |
| PluginAsia Limited | Private company limited by shares | Live |
| B I PLUGINS Limited | Private company limited by shares | Live |
| PLUGIT LIMITED | Private company limited by shares | Live |
| Plugo Company Limited | | Live |
| PLUGOOD ELECTRONIC TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Happy Plugs Limited | Private company limited by shares | Live |
| PLUGSMANN LIMITED | Private company limited by shares | Live |
| PLUGTECH PRECISION SYSTEMS LIMITED | Private company limited by shares | Live |
| PlugtoChina Limited | Private company limited by shares | Live |
| PLUGWORKZ LIMITED | Private company limited by shares | Dissolved |
| Spark Plugx Co., Limited | | Live |
| Plugy Promotion Limited | Private company limited by shares | Live |