| Pfizer (China) Biotechnology Limited | Private company limited by shares | Live |
| Pfizer Corporation Hong Kong Limited | Private company limited by shares | Live |
| Pfizer PFE Corporation Hong Kong Limited | Private company limited by shares | Live |
| Pfizer (Far East) Limited | Private company limited by shares | Live |
| PFIZER GLOBAL LIMITED | Private company limited by shares | Live |
| Pfizer (H.K.) Holding Limited | Private company limited by shares | Live |
| Pfizer Hong Kong Industrial Co., Limited | Private company limited by shares | Live |
| HongKong Pfizer Technology Co., Limited | | Live |
| Pfizer International Co., Limited | | Live |
| PFIZER INVESTMENT LIMITED | Private company limited by shares | Live |
| PFIZER HEALTH MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| PFIZER PHARMACEUTICALS (HONGKONG) LIMITED | Private company limited by shares | Live |
| PFIZER HK SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| USA PFIZERSK INT'L ENTERPRISE GROUP LIMITED | Private company limited by shares | Dissolved |