| 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 |
| KAREY DIAMOND COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND (HOP KEE) DYEING & BLEACHING FACTORY LIMITED | Private company limited by shares | Dissolved |
| KELLAN DIAMOND LIMITED | Private company limited by shares | Dissolved |
| KIMBERLEY DIAMOND LIMITED | Private company limited by shares | Live |
| KODIAK DIAMOND LIMITED | Private company limited by shares | Dissolved |
| KONG DIAMOND LIMITED | Private company limited by shares | Dissolved |
| KWAI YU DIAMOND LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LABEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LABO LIMITED | Private company limited by shares | Live |
| DIAMOND LAKE COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LAKE COMPANY LIMITED | Private company limited by shares | Live |
| DIAMOND LAMPS LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LAND LIMITED | Private company limited by shares | Live |
| DIAMOND LAND LIMITED | | Live |
| LANTON DIAMOND LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Sep-1998 |
| DIAMOND LEADER LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LEAF LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LEAF INVESTMENTS LIMITED | Private company limited by shares | Live |
| LEEDS DIAMOND COMPANY LIMITED | Private company limited by shares | Live |
| Legend Diamond Limited | Private company limited by shares | Live |
| Diamond Legend Limited | Private company limited by shares | Live |
| WOO LEUNG LEE DIAMOND COMPANY, LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LIBERTY LIMITED | | Live |
| DIAMOND LIBRARY LIMITED -THE- | Private company limited by shares | Live |
| Lichen Diamond Limited | Private company limited by shares | Live |
| DIAMOND LINK LIMITED | Private company limited by shares | Dissolved |
| DIAMOND LINK LIMITED | Private company limited by shares | Live |
| DIAMOND LINK ENTERPRISES LIMITED | Private company limited by shares | Live |
| DIAMOND LINKAGE LIMITED | Private company limited by shares | Live |
| LINPO DIAMOND TECH LIMITED | Private company limited by shares | Live Commenced dormancy on 16-Jul-2009 |
| Diamond Logistic Company Limited | Private company limited by shares | Live |
| LONDON DIAMOND GALLERY LIMITED | Private company limited by shares | Dissolved |
| LONDON DIAMOND GALLERY LIMITED | Private company limited by shares | Live |
| LONG DIAMOND LIMITED | Private company limited by shares | Dissolved |
| LONGER DIAMOND LIMITED | Private company limited by shares | Dissolved |