| Diamond Gas Company Limited | | Live |
| RED DIAMOND COMPANY LIMITED | | Live |
| DIAMOND 44 LIMITED | | Live |
| Liz Diamond Limited | | Live |
| ABLE DIAMOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| ABLE DIAMOND LIMITED | Private company limited by shares | Live |
| ADAMAN DIAMOND LIMITED | Private company limited by shares | Dissolved |
| AETERNA DIAMOND LIMITED | Private company limited by shares | Live |
| SOUTH AFRICA DIAMOND EXCHANGE LIMITED | Private company limited by shares | Live |
| DIAMOND MINE AGENTS LIMITED | Private company limited by shares | Dissolved |
| DIAMOND AGREE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Diamond Airlines Company Limited | Private company limited by shares | Live |
| Diamond Alignment Limited | Company limited by guarantee | Live |
| ALLIED DIAMOND LIMITED | | Live |
| ALSON DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| AMBITIOUS DIAMOND LIMITED | Private company limited by shares | Live |
| AMPLE DIAMOND LIMITED | Private company limited by shares | Live |
| DIAMOND WAH MEI AMUSEMENT ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| ANAYA DIAMOND LIMITED | Private company limited by shares | Live |
| DIAMOND ANGEL LIMITED | Private company limited by shares | Live |
| DIAMOND ANNIVERSARY LIMITED | Private company limited by shares | Dissolved |
| Antonelli Diamond Brothers Limited | Private company limited by shares | Live |
| DIAMOND SKY GAS APPLIANCES LIMITED | Private company limited by shares | Live |
| Aprilshine Diamond Limited | | Live |
| AQUARIUS DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND ARCH LIMITED | Private company limited by shares | Live |
| DIAMOND ARTISTIC JEWELLERY LIMITED | Private company limited by shares | Live |
| JOEY & ASHLEY DIAMOND LIMITED | Private company limited by shares | Live |
| ASIA DIAMOND LIMITED | Private company limited by shares | Dissolved |
| DIAMOND ASIA LIMITED | Private company limited by shares | Live |
| ASIA DIAMOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA DIAMOND LIMITED | Private company limited by shares | Live |
| DIAMOND ASIA HK LIMITED | | Live |
| DIAMOND AUDIO ASIA LIMITED | Private company limited by shares | Live |
| DIAMOND FORD (ASIA) LIMITED | Private company limited by shares | Live |
| GOLD DIAMOND ASIA LIMITED | Private company limited by shares | Live |
| Diamond Of Asia International Trading Import & Export Company Limited | Private company limited by shares | Live |
| Asian Diamond Company Limited | Private company limited by shares | Live |
| DIAMOND ASSET LIMITED | Private company limited by shares | Dissolved |
| DIAMOND ASSET LIMITED | Private company limited by shares | Live |
| DIAMOND ASSET INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PACIFIC DIAMOND ASSETS LIMITED | Private company limited by shares | Dissolved |
| ASTM DIAMOND, LIMITED | Private company limited by shares | Live |
| Diamond Audio Limited | Private company limited by shares | Live |
| Diamond Avenue Limited | | Live |
| DIAMOND BANCORP COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND BARON LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BASE LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BASE LIMITED | Private company limited by shares | Live |
| Base Diamond Company Limited | Private company limited by shares | Live |
| DIAMOND BEACH LIMITED | Private company limited by shares | Live |
| DIAMOND BEAR LIMITED | Private company limited by shares | Live |
| BEAUTY DIAMOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| Diamond Beauty Limited | Private company limited by shares | Live |
| Japan Glittering as a Diamond (International) Technology Beauty Limited | Private company limited by shares | Live |
| Pure Diamond Beauty Company Limited | Private company limited by shares | Live |
| HK DIAMOND WOMEN BEAUTY LIMITED | Private company limited by shares | Live |
| BENNY LAU DIAMOND JEWELLERY LIMITED | Private company limited by shares | Live |
| BEST DIAMOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| BEST DIAMOND LIMITED | Private company limited by shares | Live Commenced dormancy on 29-Dec-2011 |
| DIAMOND BEST LIMITED | Private company limited by shares | Live |
| BEST DIAMOND LIMITED | Private company limited by shares | Live |
| Beyond Diamond Limited | Private company limited by shares | Live |
| BIRCH DIAMOND LIMITED | Private company limited by shares | Live |
| Black Diamond Limited | Private company limited by shares | Dissolved |
| BLACK DIAMOND KIT CLOTHE LIMITED | Private company limited by shares | Live |
| Black Diamond Heliaero Limited | | Live |
| Black Diamond Holding Limited | Private company limited by shares | Live |
| Black Diamond Investment Limited | Private company limited by shares | Live |
| BLING FAMILY DIAMOND & WATCH COMPANY LIMITED | Private company limited by shares | Live |
| Blink Diamond Limited | Private company limited by shares | Live |
| DIAMOND BLOOM COMPANY LIMITED | Private company limited by shares | Live |
| BLUEFINE DIAMOND JEWELLERY COMPANY LIMITED | Private company limited by shares | Live |
| BOGATA DIAMOND LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BOND LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BOOTH LIMITED | Private company limited by shares | Live |
| BOUNTIFUL DIAMOND LIMITED | Private company limited by shares | Live |
| BOWAY DIAMOND LIMITED | Private company limited by shares | Live |
| DIAMOND BRAVE LIMITED | Private company limited by shares | Live |
| DIAMOND BRAVE LIMITED | Private company limited by shares | Live |
| BRIGHTON DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND BROOKS LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BROTHERS LIMITED | Private company limited by shares | Dissolved |
| Diamond Brothers HK Limited | | Live |
| BUILD DIAMOND PROPERTIES LIMITED | Private company limited by shares | Live Commenced dormancy on 05-Jun-1998 |
| DIAMOND BUSINESS LIMITED | | Live |
| DIAMOND CAPITAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND CAPITAL LIMITED | Private company limited by shares | Dissolved |
| DIAMOND SKY CAPITAL LIMITED | Private company limited by shares | Live |
| Diamond Dragon Capital Limited | Private company limited by shares | Live |
| Diamond Catering Limited | Private company limited by shares | Live |
| CATHYPAUL DIAMOND LIMITED | Private company limited by shares | Live |
| CELESTIAL DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND CENTER COMPANY LIMITED | Private company limited by shares | Live |
| ASIA DIAMOND EXCHANGE CENTRE LIMITED | Private company limited by shares | Live |
| DIAMOND CENTURY LIMITED | Private company limited by shares | Live |
| CENTURY DIAMOND LIMITED | Private company limited by shares | Live |
| CHAMP DIAMOND LIMITED | Private company limited by shares | Dissolved |
| CHAMP DIAMOND LIMITED | Private company limited by shares | Live |