| PRIMUS CO. LIMITED | Private company limited by shares | Dissolved |
| PRIMUS LIMITED | Private company limited by shares | Live |
| PRIMUS IT LIMITED | Private company limited by shares | Live |
| Primus Braginskii Limited | Private company limited by shares | Live |
| Primus Cabibbo Limited | Private company limited by shares | Live |
| PRIMUS CAPITAL LIMITED | Private company limited by shares | Live |
| Primus Win Co., Limited | Private company limited by shares | Live |
| PRIMUS ELECTRONIC LIMITED | Private company limited by shares | Live |
| PRIMUS ENTERPRISE LIMITED | Private company limited by shares | Live |
| PRIMUS FINANCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Primus Football Limited | Private company limited by shares | Live |
| Primus Ginzburg Limited | Private company limited by shares | Live |
| PRIMUS GLOBAL LIMITED | Private company limited by shares | Dissolved |
| Primus Global Investment Limited | Private company limited by shares | Live |
| PRIMUS GROUP LIMITED | Private company limited by shares | Live |
| Primus (Hong Kong) Company Limited | Private company limited by shares | Live |
| Primus Power (Hong Kong) Limited | | Live |
| PRIMUS INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| PRIMUS INVESTMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Primus Jacobian Limited | Private company limited by shares | Live |
| Primus Langevin Limited | | Live |
| Primus Majorana Limited | | Live |
| Primus Management Limited | Private company limited by shares | Live |
| PRIMUS ASSET MANAGEMENT LIMITED | Private company limited by shares | Live |
| PRIMUS NATURAL RESOURCES COMPANY LIMITED | Private company limited by shares | Live |
| PRIMUS NETWORK SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| Primus Onsager Limited | | Live |
| PRIMUS PAPER PRODUCTS COMPANY LIMITED | Private company limited by shares | Live |
| Primus Quasineutrality Limited | | Live |
| PRIMUS REALTY LIMITED | Private company limited by shares | Live |
| Primus Riesz Limited | | Live |
| Primus Shubnikov Limited | | Live |
| Primus Solutions Limited | Private company limited by shares | Live |
| Primus Tonks Limited | | Live |
| PRIMUS VISION LIMITED | | Live |