| H. C. WATT & COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATT LIMITED | Private company limited by shares | Live |
| Watt Amp Limited | Private company limited by shares | Live |
| 15 Watt Company Limited | Private company limited by shares | Live |
| WATT & ASSOCIATES | Private unlimited company | Dissolved |
| Smart Watt Lighting Co., Limited | Private company limited by shares | Live |
| One watt Opto-Electronic Co., Limited | Private company limited by shares | Live |
| WATT TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| TERRA WATT CO., LIMITED | Private company limited by shares | Live |
| WATT COMMUNITY COMPANY LIMITED | | Live |
| WaTT Connex Limited | Private company limited by shares | Live |
| HK Watt Development Co., Limited | Private company limited by shares | Dissolved |
| Rich Watt Engineering Company Limited | Private company limited by shares | Live |
| GIANT WATT SUPPLY CHAIN LIMITED | Private company limited by shares | Live |
| WATT GROUP LIMITED | Private company limited by shares | Live |
| WATT CHINA GROUP LIMITED | Private company limited by shares | Live |
| WATT ENERGY (HK) LIMITED | Private company limited by shares | Live |
| SOLAR WATT (HK) LIMITED | Private company limited by shares | Live |
| WATT TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| WATT, ZENITH HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Watt Energy Tec Co., Limited | Private company limited by shares | Live |
| TYZ WATT IMPORT & EXPORT CO., LIMITED | Private company limited by shares | Live |
| WATT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| GIN WATT INTERNATIONAL CORP LIMITED | Private company limited by shares | Dissolved |
| WATT INTERNATIONAL ENERGY TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| GIN WATT INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| WATT TECH (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| Watt Technology International Limited | Private company limited by shares | Live |
| Watt Investment Limited | Private company limited by shares | Live |
| JOHNSON & WATT LIMITED | Private company limited by shares | Dissolved |
| KING WATT LIMITED | Private company limited by shares | Dissolved |
| KING WATT OPTO-ELECTRONICS (HK) CO., LIMITED | Private company limited by shares | Live |
| GIN WATT LEATHER CORPORATION LIMITED | Private company limited by shares | Dissolved |
| HK ONE WATT LIGHT TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SO WATT Lighting Limited | Private company limited by shares | Dissolved |
| WATT WAH LOGISTICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| WATT MANAGEMENT LIMITED | | Live |
| 1 WATT MEDIA LIMITED | | Live |
| MICRO WATT CO., LIMITED | Private company limited by shares | Live |
| WATT (NOMINEES) LIMITED | Private company limited by shares | Dissolved |
| WATT & LO (NOMINEES) LIMITED | Private company limited by shares | Dissolved |
| WATT PUBLISHING COMPANY LIMITED | Private company limited by shares | Dissolved |
| QUEEN WATT COMPANY LIMITED | Private company limited by shares | Live |
| RATHSAM & WATT, LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI SANXING WATT HOUR METER LIMITED | Private company limited by shares | Live |
| Hong Kong watt semiconductor Co., Limited | | Live |
| WATT TECHNOLOGY LIMITED | Private company limited by shares | Live |
| WATT SOLAR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MEGA WATT TRADING COMPANY LIMITED | Private company limited by shares | Live |
| YOUSSOUF WATT LIMITED | Private company limited by shares | Live |
| Watta Feng Trading (HK) Co., Limited | Private company limited by shares | Live |
| HONGKONG WATTA TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| WATTCOM LIMITED | Private company limited by shares | Dissolved |
| WATTEAU INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WATTE-E GROUP LIMITED | Private company limited by shares | Live |
| WATTEL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| WATTEN CAPITAL LIMITED | Private company limited by shares | Live |
| WATTEN ENTERPRISES LIMITED | Private company limited by shares | Live |
| Watten Capital Group Limited | Private company limited by shares | Live |
| Wattenmeer Limited | Private company limited by shares | Live |
| Watterson Assets Limited | Private company limited by shares | Live |
| WATTFIELD LIMITED | Private company limited by shares | Dissolved |
| WATTFLY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| WATTFX LIMITED | Private company limited by shares | Live |
| J. A. WATTIE AND COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATTINSON COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATTIX BATTERIES (HK) LIMITED | Private company limited by shares | Dissolved |
| WATTLAND ASIA LIMITED | Private company limited by shares | Dissolved |
| WATTLAND I.T. LIMITED | Private company limited by shares | Dissolved |
| WATTLE LIMITED | Private company limited by shares | Dissolved |
| WATTLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATTLE BEST LIMITED | Private company limited by shares | Live |
| WATTLE GROUP LIMITED | Private company limited by shares | Live |
| WATTLE INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATTLINE L. P. GAS LIMITED | Private company limited by shares | Dissolved |
| Wattology Limited | | Live |
| WATTON LIMITED | Private company limited by shares | Dissolved |
| WATTON INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| WATTON INT'L LIMITED | Private company limited by shares | Live |
| WATTON MARINE CO., LIMITED | Private company limited by shares | Live |
| WATTOP LIMITED | Private company limited by shares | Live |
| HK DYNASTY FITMENT WATTRESS GROUP INT'L LIMITED | Private company limited by shares | Dissolved |
| 3 WATTS LIMITED | Private company limited by shares | Dissolved |
| Watts Clever Limited | Private company limited by shares | Live |
| Watts Clever Group Limited | Private company limited by shares | Live |
| LED WATTS CO., LIMITED | Private company limited by shares | Live |
| Watts Design Company Limited | Private company limited by shares | Live |
| Grant Watts Limited | Private company limited by shares | Live |
| CHINA WATTS WATER INDUSTRY VALVE GROUP LIMITED | Private company limited by shares | Live |
| WATTS INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| WATTS - GTC INDUSTRIAL TYRE COMPANY LIMITED | Private company limited by shares | Dissolved |
| WATTS OPTICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PETER WATTS DESIGNS LIMITED | Private company limited by shares | Live |
| WATTS SOLUTION LIMITED | Private company limited by shares | Dissolved |
| RS WATTS TECHNOLOGY LIMITED | | Live |
| Watts Venture Limited | Private company limited by shares | Live |
| WATTSBURG COMPANY LIMITED | Private company limited by shares | Live |
| Wattson Limited | Private company limited by shares | Live |
| Wattstation Power Limited | | Live |
| WATTSTRAIGHT LIMITED | Private company limited by shares | Dissolved |