| 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 |
| PROFESSIONAL MEDICAL REGULATORY SERVICE LIMITED | Private company limited by shares | Live |
| Professional Quality & Regulatory Resources Limited | Private company limited by shares | Live |
| Regulatory Assistance Project Limited -The- | Private company limited by shares | Live |
| Buchanan Technology and Regulatory Services Limited | Private company limited by shares | Live |
| REGULATORY SERVICES INTERNATIONAL LIMITED | Private company limited by shares | Live |
| REGULUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| RegulusTech Company Limited | Private company limited by shares | Live |
| Regulux Co Limited | Private company limited by shares | Live |
| Regulux Company Limited | | Live |