| WILLIAM EQUITY COMPANY LIMITED | Private company limited by shares | Live |
| FORT WILLIAM ESTATES LIMITED | Private company limited by shares | Live |
| WILLIAM S.T. LEE (EXPORT) LIMITED | Private company limited by shares | Live |
| WILLIAM FANK COMPANY, LIMITED | Private company limited by shares | Dissolved |
| WILLIAM ARTISTS AGENCIES (FAR EAST) LIMITED | Private company limited by shares | Live |
| WILLIAM RUSSELL (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM FASHION ASIA CO., LIMITED | Private company limited by shares | Dissolved |
| WILLIAM SERVICE FIBREGLASS BOAT LIMITED | Private company limited by shares | Dissolved |
| WILLIAM FOOD COMPANY LIMITED | Private company limited by shares | Live |
| PAT WILLIAM FOOD & BEVERAGE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| William Wallace Food Wholesale Limited | Private company limited by shares | Live |
| WILLIAM FORBES AND COMPANY, LIMITED | Company limited by guarantee | Dissolved |
| William Doo Foundation Limited -The- | Private company limited by shares | Live |
| DR. WILLIAM CHAO DIGESTIVE ENDOSCOPY FOUNDATION LIMITED | Company limited by guarantee | Dissolved |
| WILLIAM S.D. LOUEY EDUCATIONAL FOUNDATION LIMITED | Company limited by guarantee | Live |
| VICTOR AND WILLIAM FUNG FOUNDATION LIMITED | Company limited by guarantee | Live |
| Francis & William Limited | | Live |
| Frank & William Holding Limited | Private company limited by shares | Live |
| WILLIAM & FUNG COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM FUNG COMPANY LIMITED | Private company limited by shares | Live |
| Germany Dr William Holding Limited | Private company limited by shares | Live |
| WILLIAM ALUMINIUM WINDOW GLASS LIMITED | Private company limited by shares | Live |
| WILLIAM GOODWILL COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM MARK GOURMET TOUR (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| Anna William Group Limited | Private company limited by shares | Live |
| WILLIAM GEORGE GROUP LIMITED | Private company limited by shares | Live |
| ROYAL WILLIAM WINE GROUP LIMITED | Private company limited by shares | Live |
| WILLIAM HANDBAG FACTORY LIMITED | Private company limited by shares | Live |
| WILLIAM HARDFACED PLATE LIMITED | Private company limited by shares | Live |
| WILLIAM HARVEY BOOKS CENTRE COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM H. HINTON ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| WILLIAM AU-YEUNG (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM BRANDSTEN (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM CHANG FINANCE (HK) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM CHANG INVESTMENTS (HK) LIMITED | Private company limited by shares | Dissolved |
| CHINA WILLIAM (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM CHAN DESIGNERS (HK) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM FAN ENTERPRISES (HK) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM & ERICA (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM (HK) IMPORT EXPORT CO., LIMITED | Private company limited by shares | Dissolved |
| WILLIAM GROUP (HK) CO., LIMITED | Private company limited by shares | Live |
| WILLIAM HARE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM (H.K.) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| WILLIAM INDUSTRY (H.K.) LIMITED | Private company limited by shares | Live |
| WILLIAM MOTOR (HK) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM W. LAU HOLDINGS LIMITED | Private company limited by shares | Live |
| WILLIAM HOLDINGS COMPANY LIMITED | Private company limited by shares | Live |
| WILLIAM LAND HOLDINGS LIMITED | Private company limited by shares | Live |
| MOONGOON & WILLIAM HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| WILLIAM ROYL HOLDINGS CO. LIMITED | Private company limited by shares | Dissolved |
| HONG KONG WILLIAM MOUSSE CAKES LIMITED | Private company limited by shares | Dissolved |
| WILLIAM (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| William Green (Hong Kong) Pty Limited | Private company limited by shares | Live |
| HONG KONG WILLIAM INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM JACKS & COMPANY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong William Yu Limited | Private company limited by shares | Dissolved |
| WILLIAM BARCLAY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM E. CONNOR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM GRANT & SONS HONG KONG LIMITED | Private company limited by shares | Live |
| HONG KONG WILLIAM ZIRCON LIMITED | Private company limited by shares | Live |
| HONGKONG WILLIAM BIOTECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HONGKONG WILLIAM FILM CO., LIMITED | Private company limited by shares | Live |
| Hongkong Mini William Food Co., Limited | Private company limited by shares | Live |
| HONGKONG WILLIAM IMPORT EXPORT CO., LIMITED | Private company limited by shares | Live |
| HONGKONG WILLIAM (GROUP) LIMITED | Private company limited by shares | Dissolved |
| HONGKONG WILLIAM PRINCE INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| HongKong William Media Limited | Private company limited by shares | Live |
| HONGKONG WILLIAM ROYAL PROPERTY LIMITED | Private company limited by shares | Live |
| WILLIAM ROYAL (HONGKONG) TRADE CO., LIMITED | Private company limited by shares | Dissolved |
| HUNDA (WILLIAM) COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM HUNT ENGINEERS LIMITED | Private company limited by shares | Dissolved |
| WILLIAM HWANG AND COMPANY, LIMITED | Private company limited by shares | Dissolved |
| WILLIAM IMPORT AND EXPORT CO. LIMITED | Private company limited by shares | Live |
| WILLIAM INDUSTRIAL&TRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| WILLIAM CHANG INDUSTRIES (HK) LIMITED | Private company limited by shares | Dissolved |
| WILLIAM STUART INDUSTRIES (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG WILLIAM INDUSTRIES LIMITED | Private company limited by shares | Live |
| WILLIAM WATCH INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| WILLIAM INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM WOO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| WILLIAM INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 28-Jan-2011 |
| LEO WILLIAM INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| WILLIAM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| William International Airport Services Limited | Private company limited by shares | Live |
| WILLIAM ARTISTS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| WILLIAM CHUNG INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HK WILLIAM INTERNATIONAL AUCTION CO., LIMITED | Private company limited by shares | Live |
| William International Supply Chain Co., Limited | | Live |
| William Innovate Technology International Co., Limited | Private company limited by shares | Live |
| WILLIAM INTERNATIONAL CONSTRUCTION LIMITED | Private company limited by shares | Live |
| WILLIAM INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| WILLIAM SO INTERNATIONAL FOUNDATION LIMITED | Company limited by guarantee | Live |
| WILLIAM GROUP INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| WILLIAM INTERNATIONAL HOLDINGS COMPANY LIMITED | Private company limited by shares | Dissolved |
| William International Group (Hong Kong) Limited | Private company limited by shares | Live |
| WILLIAM INTERNATIONAL (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| Hong Kong William International Limited | Private company limited by shares | Live |
| WILLIAM INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| William International Investment Limited | | Live |