| Regius Asset Management Limited | Private company limited by shares | Live |
| REGIUS CAPITAL PARTNERS LIMITED | Private company limited by shares | Live |
| REG-KING CORPORATE SERVICES LIMITED | Private company limited by shares | Live |
| COLOURTONE REGLAZING LIMITED | Private company limited by shares | Dissolved |
| Regline Limited | | Live |
| Hong Kong Re-Glory Resources Recycling Limited | Private company limited by shares | Live |
| Regmed Solutions Limited | Private company limited by shares | Live |
| REGNA TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Regna International Limited | Private company limited by shares | Live |
| BUNNY REGNANT CO. LIMITED | Private company limited by shares | Live |
| REGNANT TRADING DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| REGNANT ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| REGNAULT CONSULTING LIMITED | | Live |
| REGNIERL INTERNATIONAL HONGKONG GROUP LIMITED | Private company limited by shares | Live |
| Caramella Regno Limited | | Live |
| Regnocrypto Limited | | Live |
| Regnum Company Limited | Private company limited by shares | Live |
| Regnum Enterprise Co., Limited | Private company limited by shares | Live |
| Regnum Digital Limited | Private company limited by shares | Live |
| REGNUM ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| REGNUM FOODSERVICE LIMITED | Private company limited by shares | Live |
| GLOBAL REGNUM LIMITED | Private company limited by shares | Live |
| REGNUM ENTERTAINMENT HOLDINGS LIMITED | Private company limited by shares | Live |
| REGNUM SALUTEM LIMITED | Private company limited by shares | Live |
| REGO LIMITED | Private company limited by shares | Dissolved |
| REGO TOOLING CO., LIMITED | Private company limited by shares | Live |
| REGO TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| REGO FAR EAST LIMITED | Private company limited by shares | Dissolved |
| REGO ENTERPRISE LIMITED | Private company limited by shares | Live |
| HK REGO IMPORT AND EXPORT CO., LIMITED | Private company limited by shares | Live |
| REGO GAINER COMPANY LIMITED | Private company limited by shares | Dissolved |
| Germany REGO Group Co., Limited | Private company limited by shares | Live |
| REGO Global Trading Limited | Private company limited by shares | Live |
| REGO INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| REGO (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| REGO (HONG KONG) LIMITED | Private company limited by shares | Live |
| REGO INDUSTRIAL LIMITED | Private company limited by shares | Live |
| REGO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| REGO AGRO Invest Holding Limited | Private company limited by shares | Live |
| Rego Investments Limited | Private company limited by shares | Live |
| REGO PACKAGE LIMITED | Private company limited by shares | Dissolved |
| REGO PACKING (HK) INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| REGO AUTOMOBILE PARTS CO., LIMITED | Private company limited by shares | Live |
| REGO PROPERTIES LIMITED | Private company limited by shares | Live |
| Rego Property Management Company Limited | | Live |
| Rego Shipping Limited | Private company limited by shares | Live |
| Rego (Hongkong) Supply Chain Limited | Private company limited by shares | Live |
| REGO Technology (Hongkong) Limited | Private company limited by shares | Live |
| Rego Plast (HK) Technology Limited | Private company limited by shares | Live |
| REGOAL LIMITED | Private company limited by shares | Live |
| REGOAL ENGINEERING LIMITED | Private company limited by shares | Live |
| Asia Regolden Capital Limited | Private company limited by shares | Live |
| REGOLITE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Regolith Limited | Private company limited by shares | Live |
| REGON LIMITED | Private company limited by shares | Dissolved |
| REGONIA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| REGOODS (HK) LIMITED | Private company limited by shares | Live |
| REGOR LIMITED | Private company limited by shares | Dissolved |
| REGOR LIMITED | Private company limited by shares | Live |
| REGO'S CATERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| REGPUS LIMITED | Private company limited by shares | Live |
| REGR COMPANY LIMITED | Private company limited by shares | Dissolved |
| REGRAVITY CO., LIMITED | Private company limited by shares | Live |
| REGREAT TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ReGreen Limited | | Live |
| No Regrets Company Limited | Private company limited by shares | Live |
| EC REGROWTH LIMITED | | Live |
| RegShield AI Limited | Private company limited by shares | Live |
| RegSolution Limited | | Live |
| Regtec (International) Co., Limited | Private company limited by shares | Live |
| REGTECH COMPANY LIMITED | Private company limited by shares | Live |
| GCC Regtech Limited | Private company limited by shares | Live |
| Kingship Regtech Limited | Private company limited by shares | Live |
| ViewPoint RegTech Limited | Private company limited by shares | Live |
| REGTEK LIMITED | Company limited by guarantee | Live |
| Regtics Limited | Private company limited by shares | Live |
| REGTIME.NET LIMITED | Private company limited by shares | Dissolved |
| Regua Technology (HongKong) Limited | Private company limited by shares | Live |
| REGUFLUID CONTROL CO., LIMITED | Private company limited by shares | Live |
| REGUL LIMITED | Private company limited by shares | Live |
| REGULAR LIMITED | Private company limited by shares | Dissolved |
| NEW REGULAR LIMITED | Private company limited by shares | Live |
| Regular Boxx Limited | Private company limited by shares | Live |
| REGULAR HONEST LIMITED | Private company limited by shares | Dissolved |
| REGULAR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Regular Realty Limited | Private company limited by shares | Live |
| REGULAR TRADING LIMITED | Private company limited by shares | Dissolved |
| CONTINENTALS REGULATING LIMITED | Private company limited by shares | Dissolved |
| GALA REGULATING LIMITED | Private company limited by shares | Live |
| PARS REGULATOR (HONGKONG) LIMITED | Private company limited by shares | Live |
| RAIL REGULATOR TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Regulatorix Asia Limited | Private company limited by shares | Live |
| GERMANY LIWEI NON-CONTACT REGULATORS (CHINA) MANUFACTURING LIMITED | Company limited by guarantee | Dissolved |
| Alliance Regulatory Limited | | Live |
| REGULATORY ENGINEERING CONSULTANCY LIMITED | Private company limited by shares | Live |
| GUARDIAN REGULATORY CONSULTING LIMITED | Private company limited by shares | Live |
| HONG KONG AND MACAU REGULATORY SERVICE LIMITED | Private company limited by shares | Live |
| Regulatory House Limited -The- | Private company limited by shares | Dissolved |
| PHARMACEUTICAL REGULATORY SERVICES (HONG KONG) LIMITED | Private company limited by shares | Live |
| PHARMACEUTICAL REGULATORY SERVICES (HONG KONG) LIMITED | Private company limited by shares | Live |