| HK CREN BIOTECH LIMITED | Private company limited by shares | Dissolved |
| CUBE Biotech Cosmetics International Limited | Private company limited by shares | Live |
| Royce Cullian Biotech Limited | | Live |
| CUOMO BIOTECH LIMITED | Private company limited by shares | Live |
| CYBERNETICS BIOTECH LIMITED | Private company limited by shares | Live |
| CYBERTECH BIO-TECH LIMITED | Private company limited by shares | Live |
| CYPRESS BIO-TECH COMPANY LIMITED | Private company limited by shares | Live |
| DANGDAI BIOTECH LIMITED | Private company limited by shares | Live |
| DaRen Biotech Limited | Private company limited by shares | Live |
| Darui Biotech (Hong Kong) Co., Limited | Private company limited by shares | Live |
| DARWIN BIOTECH LIMITED | Private company limited by shares | Live |
| Dazzeon Biotech Limited | Private company limited by shares | Live |
| DeBary Biotech Limited | | Live |
| DECHENG BIOTECH (HK) CO., LIMITED | Private company limited by shares | Live |
| Deepsense Biotech Limited | | Live |
| Delonix Biotech Limited | Private company limited by shares | Live |
| BIOTECH DENTAL LIMITED | Private company limited by shares | Live |
| DERLL BIOTECH LIMITED | Private company limited by shares | Live |
| DESMI BIOTECH LIMITED | | Live |
| DEVELOP BIOTECH (HK) LIMITED | Private company limited by shares | Dissolved |
| DGEN BIOTECH LIMITED | Private company limited by shares | Dissolved |
| WM DIANORM BIOTECH CO., LIMITED | Private company limited by shares | Live |
| Dillion Biotech Limited | Private company limited by shares | Live |
| DINE GROUP BIOTECH (H.K) CO., LIMITED | Private company limited by shares | Live |
| HK DIYANTANG BIOTECH LIMITED | Private company limited by shares | Live |
| DONGSHENG BIOTECH CO., LIMITED | Private company limited by shares | Live |
| DORIS (FRANCE) BIOTECH LIMITED | Private company limited by shares | Live |
| DOWAY BIOTECH LIMITED | Private company limited by shares | Live |
| DOWIN BIOTECH LIMITED | Private company limited by shares | Dissolved |
| DRAGON BIO-TECH COMPANY LIMITED | Private company limited by shares | Live |
| DreaMpact Bio-Tech Limited | Private company limited by shares | Live |
| Dshare Biotech Limited | Private company limited by shares | Live |
| Dymind Biotech (HK) Co., Limited | Private company limited by shares | Live |
| Algae Dynamic Biotech Limited | Private company limited by shares | Live |
| DYTGEN BIOTECH LIMITED | | Live |
| EAGLE FAST INTERNATIONAL BIOTECH COMPANY LIMITED | Private company limited by shares | Live |
| Earth Care Biotech Products Company Limited | Private company limited by shares | Live |
| Easson Polyphenols Biotech INTL Limited | | Live |
| BIOTECH SOUTH EAST ASIA CORPORATION LIMITED | Private company limited by shares | Dissolved |
| EASTSIGN BIO-TECH LIMITED | Private company limited by shares | Live |
| Easy Bio-Tech Limited | | Live |
| EAZIER BIOTECH LIMITED | Private company limited by shares | Dissolved |
| E-CARE BIOTECH LIMITED | Private company limited by shares | Dissolved |
| Ecofungus Bio-Tech (HK) Co., Limited | Private company limited by shares | Live |
| CROSS-STRAIT BIOTECH CULTURE & EDUCATION LIMITED | Private company limited by shares | Live |
| E-ECO BIOTECH LIMITED | Private company limited by shares | Dissolved |
| E.g. Biotech Limited | | Live |
| ELEBEAU BIOTECH LIMITED | Private company limited by shares | Live |
| BIOTECH ELECTRONICS LIMITED | Private company limited by shares | Live |
| HK Eleventh Bio-tech Co., Limited | | Live |
| Elite Asia Biotech Limited | Private company limited by shares | Dissolved |
| Nature Elite Biotech Co., Limited | Private company limited by shares | Live |
| Elleon Biotech Limited | | Live |
| EMKA BIOTECH HONG KONG CO., LIMITED | Private company limited by shares | Live |
| BIO-TECH ENERGY LIMITED | Private company limited by shares | Dissolved |
| 3MC BIOTECH ENERGY LIMITED | Private company limited by shares | Live |
| Green Energy Bio-Tech Limited | Private company limited by shares | Live |
| GREEN ENERGY BIOTECH CORPORATION LIMITED | Private company limited by shares | Live |
| Green Energy Bio-Tech Holding Limited | Private company limited by shares | Live |
| ADVANCED BIOTECH AND ENGINEERING LIMITED | | Live |
| CYTOTREND BIOTECH ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| HK ZHONGRUN BIOTECH ENGINEERING LIMITED | Private company limited by shares | Live |
| FRANCE ELILEI BIO-TECH ENTERPRISE GROUP LIMITED | Private company limited by shares | Dissolved |
| LANDAKENT BIO-TECH ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| ALLOWANCE OF ASCENDANT ENVIRONMENTAL BIOTECH LIMITED | Private company limited by shares | Dissolved |
| Enzyme Biotech Company Limited | Private company limited by shares | Dissolved |
| HONG KONG ENZYMOGEN BIOTECH COMPANY LIMITED | Private company limited by shares | Live |
| EONTERRA BIOTECH GROUP CO., LIMITED | | Live |
| Epiphany Biotech Group Limited | Private company limited by shares | Live |
| ePOCT Biotech Limited | Private company limited by shares | Live |
| EPPEN BIOTECH (HONGKONG) LIMITED | Private company limited by shares | Live |
| EPRUI Biotech Co., Limited | Private company limited by shares | Live |
| Eram Biotech Co. Limited | Private company limited by shares | Live |
| Ergpel Biotech HK Limited | | Live |
| ESENSE BIOTECH COMPANY LIMITED | Private company limited by shares | Live |
| Eterno Biotech Limited | | Live |
| ETIKA BIOTECH LIMITED | Private company limited by shares | Live |
| EVERBEST BIOTECH LIMITED | Private company limited by shares | Live |
| Everbright Biotech (HK) Limited | Private company limited by shares | Live |
| EVERSHINE BIOTECH CO., LIMITED | Private company limited by shares | Live |
| EXCALIBENE BIOTECH LIMITED | Private company limited by shares | Dissolved |
| EXPLORER BIOTECH COMPANY LIMITED | Private company limited by shares | Live |
| HK EYEKEY BIOTECH LIMITED | Private company limited by shares | Dissolved |
| Eyenova Biotech Limited | | Live |
| Fance Page Bio-Tech Co., Limited | Private company limited by shares | Live |
| Fanchau Biotech Limited | Private company limited by shares | Live |
| FANDA BIO-TECH LIMITED | Private company limited by shares | Live |
| HK FANGLEI BIOTECH LIMITED | Private company limited by shares | Live |
| HK FANYAXI BIOTECH LIMITED | Private company limited by shares | Live |
| RICH FARMS BIOTECH LIMITED | Private company limited by shares | Live |
| FECONDO BIOTECH LIMITED | Private company limited by shares | Live |
| FEIFEI BIOTECH LIMITED | | Live |
| FELICITY BIOTECH CO., LIMITED | Private company limited by shares | Live |
| Feronia Biotech Limited | Private company limited by shares | Live |
| Fick Life (Hong Kong) Biotech Limited | | Live |
| First-Element Biotech Limited | | Live |
| ECO FISH AQUA BIO-TECH (HK) LIMITED | Private company limited by shares | Live |
| Fortune Five International Bio-Tech Limited | Private company limited by shares | Live |
| Flourish Biotech Co., Limited | Private company limited by shares | Live |
| Flychem Bio-tech Company Limited | Private company limited by shares | Live |