| HARRY INDUSTRIAL DIAMOND TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND INFINITY LIMITED | Private company limited by shares | Live |
| Infinity Diamond Limited | | Live |
| DIAMOND INNOVATIONS LIMITED | | Live |
| Integrity Diamond Limited | Private company limited by shares | Live |
| ACE OF DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND WAY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND FUR INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND SUN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NEW DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BAY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOP DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ALL DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| Hua Xia Diamond Investment Limited | Private company limited by shares | Live |
| San Diamond Investment Limited | Private company limited by shares | Dissolved |
| DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND SKY INVESTMENT LIMITED | Private company limited by shares | Live |
| ASIA DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND BASE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Best Diamond Way Investment Limited | Private company limited by shares | Live |
| DIAMOND BOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND BRONZE INVESTMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 18-Aug-2009 |
| DIAMOND CAPITAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Diamond Investment Centre Limited | Private company limited by shares | Live |
| DIAMOND DRAGON INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND FAIR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND FORM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND FRIEND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND FULL INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND GLORY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GLORY DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| GOLD DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GOLD DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| GRAND DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND HARBOUR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Diamond Holding Investment Limited | Private company limited by shares | Live |
| KWUN TAT DIAMOND INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LAND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LUCK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LUCK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PACIFIC DIAMOND INVESTMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 29-Apr-2009 |
| DIAMOND POINT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| RICH DIAMOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND STRONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND TRADE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DIAMOND VALUE INVESTMENT LIMITED | Private company limited by shares | Live |
| Vast Diamond Investment Limited | Private company limited by shares | Live |
| DIAMOND WAVE INVESTMENT LIMITED | Private company limited by shares | Live |
| DIAMOND INVESTMENTS LIMITED | Private company limited by shares | Live |
| DIAMOND NEW INVESTMENTS LIMITED | Private company limited by shares | Live Ceased dormancy on 26-Aug-2013 |
| GAO XIN DIAMOND INVESTMENTS LIMITED | Private company limited by shares | Live |
| DIAMOND ACE INVESTMENTS LIMITED | Private company limited by shares | Live |
| EASTERN DIAMOND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Diamond Edge Investments Limited | Private company limited by shares | Live |
| Diamond Ocean Investments Limited | Private company limited by shares | Live |
| DIAMOND RICHIE INVESTMENTS LIMITED | Private company limited by shares | Live |
| JACK BROTHER DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| Jasmine Diamond HK Limited | | Live |
| J.B. Diamond Limited | Private company limited by shares | Live |
| HK DIAMOND WANGLAOWU JEWEL LIMITED | Private company limited by shares | Live |
| BO FAI JEWELLERY & DIAMOND LIMITED | Private company limited by shares | Dissolved |
| DIAMOND RAY JEWELLERY LIMITED | Private company limited by shares | Live |
| DIAMOND ART JEWELLERY COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| BE DIAMOND JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| BTR DIAMOND & JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| L D Diamond and Jewellery Limited | Private company limited by shares | Live |
| In Diamond Jewellery Limited | Private company limited by shares | Live |
| Diamond & Diamond Jewellery Limited | | Live |
| DIAMOND BASE JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| Blink Diamond & Jewellery Limited | Private company limited by shares | Live |
| DIAMOND AND JEWELLERY CENTRE LIMITED -THE- | Private company limited by shares | Dissolved |
| DIAMOND COLLECTION JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| DREAMZ DIAMOND AND JEWELLERY LIMITED | Private company limited by shares | Live |
| FASHIONABLE DIAMOND AND JEWELLERY COMPANY LIMITED | | Live |
| DIAMOND GLORY JEWELLERY CO. LIMITED | Private company limited by shares | Live |
| GOLD DIAMOND JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| GOLD & DIAMOND JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| Diamond Gold Jewellery Limited | Private company limited by shares | Live |
| TRULY DIAMOND GOLD & JEWELLERY COMPANY LIMITED | Private company limited by shares | Live Ceased dormancy on 22-Sep-2015 |
| Loving diamond jewellery Limited | Private company limited by shares | Live |
| DIAMOND NICE JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| MY JEWELRY (DIAMOND) LIMITED | Private company limited by shares | Live |
| 1 DIAMOND JEWELRY LIMITED | Private company limited by shares | Dissolved |
| Sky Diamond Jewelry Limited | | Live |
| WORLD GOLD JEWELRY JADE DIAMOND IMP & EXP TRADE SPREAD LIMITED | Private company limited by shares | Dissolved |
| INDIA HARI DIAMOND JEWELRY INVESTMENT CORPORATION (HK) LIMITED | Private company limited by shares | Live |
| THOUSAND DIAMOND STARS (HK) INT'L JEWELRY LIMITED | Private company limited by shares | Dissolved |
| PURE DIAMOND & JEWELRY LIMITED | Private company limited by shares | Live |
| JINLI DIAMOND TRADING LIMITED | Private company limited by shares | Live |
| JINRUI DIAMOND TOOL FACTORY LIMITED | | Live |
| JINRUI DIAMOND TOOLS FACTORY LIMITED | Private company limited by shares | Live |
| JOYFUL DIAMOND LIMITED | Private company limited by shares | Live |
| DIAMOND JUPITER LIMITED | Private company limited by shares | Live |
| DIAMOND JUPITER MANUFACTORY COMPANY LIMITED | Private company limited by shares | Live |
| JUST DIAMOND COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 08-Aug-2016 |
| RK DIAMOND JWELLERY CO LIMITED | | Live |
| EAST DIAMOND HILL KAI-FONG WELFARE ASSOCIATION LIMITED | Company limited by guarantee | Dissolved |
| KAPPA DIAMOND LIMITED | Private company limited by shares | Dissolved |