| DIAAS LIMITED | Private company limited by shares | Live |
| DIABASE COMPANY LIMITED | Private company limited by shares | Dissolved |
| NORTH DIABASE LIMITED | Private company limited by shares | Dissolved |
| DIABEAM COMPANY, LIMITED | Private company limited by shares | Dissolved |
| DIABELL HK LIMITED | Private company limited by shares | Live |
| ANGEL OF DIABETIC LIMITED | Company limited by guarantee | Live |
| Diabigdata HK Limited | Private company limited by shares | Live |
| DEL DIABLO LIMITED | Private company limited by shares | Dissolved |
| DIABLUE LIMITED | Private company limited by shares | Dissolved |
| DIABO COMPANY LIMITED | Private company limited by shares | Dissolved |
| Diabolo Limited | Private company limited by shares | Live |
| DIABOLO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Diabond Limited | | Live |
| DIABRIGHT LIMITED | Private company limited by shares | Dissolved |
| DIA-BRILLIANT JEWELRY COMPANY LIMITED | Private company limited by shares | Live |
| DIABRO LIMITED | Private company limited by shares | Dissolved |
| DiaCarta, Limited | Private company limited by shares | Live |
| DIACENTRE COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIACIA JEWELRY LIMITED | Private company limited by shares | Live |
| DIACIFO INTERNATIONAL GROUP CO., LIMITED | Private company limited by shares | Live |
| DIACIFO INTERNATIONAL SARL LIMITED | Private company limited by shares | Dissolved |
| DIACO JEWELLERY LIMITED | Private company limited by shares | Live |
| DIACO TRADING LIMITED | Private company limited by shares | Dissolved |
| DIACOM HK LIMITED | Private company limited by shares | Dissolved |
| DIACONO COMPANY LIMITED | Private company limited by shares | Live |
| M.D.M. DIACRAFTS LIMITED | Private company limited by shares | Live |
| DIACT PRO LIMITED | Private company limited by shares | Live |
| DIACTIVE LIMITED | Private company limited by shares | Dissolved |
| DIACUT LIMITED | Private company limited by shares | Live Commenced dormancy on 31-Dec-2014 |
| DIACUT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| DIADE ASIA LIMITED | Private company limited by shares | Dissolved |
| DIADEM LIMITED | Private company limited by shares | Dissolved |
| Diadem Limited | Private company limited by shares | Live |
| DIADEM DIAMONDS LIMITED | Private company limited by shares | Live |
| Diader LIMITED | Private company limited by shares | Live |
| Diader Beauty makeup Co., Limited | Private company limited by shares | Live |
| Diadong Trading Limited | Private company limited by shares | Live |
| ITALY DIADORA LIMITED | Private company limited by shares | Dissolved |
| DIADORA ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| DIAEY MOND CO., LIMITED | Private company limited by shares | Live |
| DIAFANO CO., LIMITED | Private company limited by shares | Live |
| DIAFLARE LIMITED | Private company limited by shares | Dissolved |
| FRANCE DIAFLEI FASHION LIMITED | Private company limited by shares | Live |
| DIAFORM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAFRO COMPANY LIMITED | Private company limited by shares | Live |
| DIAFRO HK LIMITED | Private company limited by shares | Dissolved |
| DIAFUNDS LIMITED | Private company limited by shares | Dissolved |
| Diag Limited | | Live |
| DIAG TRADE CO., LIMITED | Private company limited by shares | Live |
| DIAG INTERNATIONAL LIMITED | | Live |
| DiagCare Limited | Private company limited by shares | Live |
| DiagCor Bioscience Limited | Private company limited by shares | Live |
| DIAGCOR (HOLDING) COMPANY LIMITED | Private company limited by shares | Live |
| DIAGDELIVERY LIMITED | Private company limited by shares | Dissolved |
| DIA-GEM LIMITED | Private company limited by shares | Dissolved |
| DIAGEM JEWELS LIMITED | Private company limited by shares | Dissolved |
| DIAGLO TRADING LIMITED | Private company limited by shares | Live |
| DIAGNAL LIMITED | Private company limited by shares | Live |
| DIAGNOCHIP LIMITED | Private company limited by shares | Dissolved |
| Diagnogen Limited | | Live |
| Retinal Diagnos (Hong Kong) Limited | Private company limited by shares | Live |
| OTECH DIAGNOS LIMITED | Private company limited by shares | Live |
| Diagnose Early Hong Kong Limited | Private company limited by shares | Live |
| iCarbonx Diagnosis Investment Limited | | Live |
| Worg Diagnosis(HongKong) Co., Limited | | Live |
| CFT DIAGNOSTIC LIMITED | Private company limited by shares | Dissolved |
| DIAGNOSTIC BOX LIMITED -THE- | Private company limited by shares | Live |
| Diagnostic Way Limited | Private company limited by shares | Live |
| EP DIAGNOSTIC LIMITED | Private company limited by shares | Live |
| Diagnostic One Company Limited | | Live |
| Bioeco Diagnostic Limited | | Live |
| 519 Skin Analysis and Diagnostic Centre Limited | | Live |
| PROMED DIAGNOSTIC CENTRE LIMITED | Private company limited by shares | Live |
| DIAGNOSTICBIO LIMITED | Private company limited by shares | Dissolved |
| GEO DIAGNOSTICS LIMITED | Private company limited by shares | Dissolved |
| CCL DIAGNOSTICS LIMITED | Private company limited by shares | Dissolved |
| Top Diagnostics SRL Limited | Private company limited by shares | Live |
| MST DIAGNOSTICS HK LIMITED | Private company limited by shares | Live |
| GAP DIAGNOSTICS LIMITED | Private company limited by shares | Dissolved |
| TEK DIAGNOSTICS LIMITED | Private company limited by shares | Dissolved |
| Qi Diagnostics Limited | Private company limited by shares | Live |
| DIAGNOSTICS LIMITED | | Live |
| APAC Diagnostics Limited | Private company limited by shares | Live |
| BIO-ASIA DIAGNOSTICS COMPANY LIMITED | Private company limited by shares | Live |
| HK.DNA Diagnostics Centre Limited | Private company limited by shares | Live |
| HK.DNA Diagnostics Centre Limited | Private company limited by shares | Live |
| HEALTHCARE DIAGNOSTICS CHINA LIMITED | Private company limited by shares | Live |
| GENERAL DIAGNOSTICS LIMITED | | Live |
| HEALTHCARE DIAGNOSTICS LIMITED | Private company limited by shares | Live |
| DIAGNOSTICS-ACCESS COMPANY LIMITED | Private company limited by shares | Live |
| DIAGNOTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| DiagnoVEX Therapeutics Limited | | Live |
| DIAGON JUNGLE COMPANY LIMITED | | Live |
| DIAGONAL LIMITED | Private company limited by shares | Dissolved |
| DIAGONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN DIAGPOWER TECH CO., LIMITED | Private company limited by shares | Live |
| DIAGRAM LIMITED | Private company limited by shares | Live |
| HONGKONG DIAGRAM TECHNOLOGY COMPANY LIMITED | | Live |
| DIAGRAM PRODUCT LIMITED | Private company limited by shares | Dissolved |
| DIAGTECH PACIFIC LIMITED | Private company limited by shares | Dissolved |