| MYSIS SALON & SPA LIMITED | | Live |
| mySister.hk Limited | Private company limited by shares | Dissolved |
| mySiteHK Limited | Private company limited by shares | Live |
| MYSK LIMITED | Private company limited by shares | Dissolved |
| Myskin Limited | Private company limited by shares | Live |
| MySky Limited | Private company limited by shares | Live |
| MYSKYJOB LIMITED | Private company limited by shares | Live |
| MYSKYLINE LIMITED | | Live |
| HK MYSLINK ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| mySmartJarvis Limited | Private company limited by shares | Live |
| My-Smartt Limited | Private company limited by shares | Live |
| MYSMARTTOOL LIMITED | Private company limited by shares | Live |
| MYSO LIMITED | Private company limited by shares | Dissolved |
| MYSOBIO COMPANY LIMITED | Private company limited by shares | Live |
| Mysolartech Co., Limited | Private company limited by shares | Live |
| MYSOLO LIMITED | Private company limited by shares | Live |
| Mysolutions Asia Co Limited | Private company limited by shares | Live |
| Myson Limited | Private company limited by shares | Live |
| Mysoul Crafts Limited | Private company limited by shares | Live |
| MYSP LIMITED | Private company limited by shares | Dissolved |
| MYSP LIMITED | Private company limited by shares | Live |
| My Coach My Movement MySpace Limited | | Live |
| Myspeed Limited | Private company limited by shares | Live |
| my-Spexx Limited | Private company limited by shares | Live |
| MYST LIMITED | Private company limited by shares | Live |
| MYST ENTERPRISE CO., LIMITED | Private company limited by shares | Live |
| Myst Investment Limited | Private company limited by shares | Live |
| MYST TECH LIMITED | | Live |
| MYSTA HK INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| MYSTAR HK LIMITED | | Live |
| MYSTAR TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| MyStarPick Limited | | Live |
| Mystart Limited | Private company limited by shares | Live |
| MYSTATICE COMPANY LIMITED | Private company limited by shares | Live |
| MYSTEEL MO HK LIMITED | Private company limited by shares | Live |
| FRENCH MYSTELAN (INTERNATIONAL) GROUP LIMITED | | Live |
| MYSTEM LIMITED | Private company limited by shares | Live |
| MYSTEP LIMITED | Private company limited by shares | Live |
| MYSTEP 227 LIMITED | Private company limited by shares | Live |
| mYSTEPS Limited | | Live |
| MYSTERE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Mysteri International Holdings Corporation Limited | Private company limited by shares | Live |
| Mysterio Limited | Private company limited by shares | Dissolved |
| Mysterio Limited | Private company limited by shares | Live |
| MYSTERIOUS BOX CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Mysterious Cultural Communications Limited | Private company limited by shares | Live |
| Mysterious Stone & Crystal Company Limited | Private company limited by shares | Live |
| Mysterious Dream Limited | | Live |
| East Mysterious Power Limited | | Live |
| MYSTERIOUS FIRE DIGITAL Technology Limited | Private company limited by shares | Live |
| Hong Kong Mysterious Man Firm Limited | | Live |
| Mysterious Glamour Hong Kong Limited | Private company limited by shares | Dissolved |
| MYSTERIOUS EASTERN HERBS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONGKONG MYSTERIOUS ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Mysterious Industrial Co., Limited | | Live |
| MYSTERIOUS MOON INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Mysterious Island Hotel Management Co., Limited | Private company limited by shares | Live |
| Mysterious Solutions Limited | Private company limited by shares | Live |
| WORLD MYSTERIOUS ZHEN-DAO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MYSTERIUM COMPANY LIMITED | Private company limited by shares | Live |
| 18 Mystery Limited | Private company limited by shares | Live |
| Mystery Limited | Private company limited by shares | Live |
| C.T MYSTERY LIMITED | Private company limited by shares | Live |
| About Mystery Company Limited | | Live |
| Asia Mystery Research Limited | Private company limited by shares | Live |
| Benchmark Mystery Shopper Limited | Private company limited by shares | Live |
| BEAUTY MYSTERY (CHINA) LIMITED | Private company limited by shares | Live |
| Mystery Joy Co., Limited | Private company limited by shares | Live |
| MYSTERY HK CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Mystery Trading Co., Limited | Private company limited by shares | Live |
| Mystery Hong Kong Trading Co., Limited | | Live |
| MYSTERY CROWN LIMITED | Private company limited by shares | Dissolved |
| HK MYSTERY CROWN IND LIMITED | Private company limited by shares | Live |
| MYSTERY CROWN ENTERPRISES LIMITED | Private company limited by shares | Live |
| MYSTERY CROWN INVESTMENT LIMITED | Private company limited by shares | Live |
| Vegetable And Fruit Mystery Agricultural Products Development Limited | Private company limited by shares | Live |
| MYSTERY ELECTRONICS LIMITED | Private company limited by shares | Live |
| Mystery Electronics Pte Limited | Private company limited by shares | Live |
| Mystery Element Limited | Private company limited by shares | Live |
| MORE MYSTERY Engineering Limited | | Live |
| FACE MYSTERY BEAUTY GROUP LIMITED | Private company limited by shares | Live |
| ORIENTAL MYSTERY (GROUP) LIMITED | Private company limited by shares | Dissolved |
| STAR MYSTERY GROUP LIMITED | Private company limited by shares | Live |
| MYSTERY HEAVENLY LOVE INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Angie Mystery Holdings Limited | Private company limited by shares | Live |
| MYSTERY STRATEGY (HOLDINGS) CO. LIMITED | Private company limited by shares | Live |
| HONG KONG MYSTERY CULTURE COMMUNICATION CO., LIMITED | | Live |
| Mystery Design (Hong Kong) Limited | Private company limited by shares | Dissolved |
| MYSTERY INTERNATIONAL BEAUTY INDUSTRY GROUP (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG HAPPINESS MYSTERY CULTURAL INDUSTRY GROUP HOLDING LIMITED | Private company limited by shares | Live |
| Mystery Box Hong Kong Limited | | Live |
| Hong Kong Time Mystery Health Management Holding Group Limited | | Live |
| HONGKONG LIFE MYSTERY BIOTECHNOLOGY LIMITED | Private company limited by shares | Live |
| INTERNATIONAL HUAXIA CIVILIZATION MYSTERY CULTURAL RESEARCH INSTITUTE LIMITED | Private company limited by shares | Live |
| MYSTERY CROWN INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HEALTH MYSTERY HEALTH INDUSTRY LIMITED | Private company limited by shares | Live |
| Mystery Client Information Technology Co., Limited | | Live |
| MYSTERY L INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MYSTERY CROWN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MYSTERY PROSPEROUS INTERNATIONAL LIMITED | Private company limited by shares | Live |