| ptaby Limited | Private company limited by shares | Live |
| PTAC CYBER E-BIZ LIMITED | Private company limited by shares | Dissolved |
| Ptah Heritage Limited | Private company limited by shares | Live |
| PTAH HOLDING LIMITED | | Live |
| PTAH INTERNET TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PTAI Limited | Private company limited by shares | Live |
| PTANG STUDIO LIMITED | Private company limited by shares | Live |
| PTANG STUDIO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| PTARMIGAN INTEGRATION LIMITED | Private company limited by shares | Live |
| Ptarmigan And Eden Asset Management Limited | Private company limited by shares | Live |
| PTAT LIMITED | Private company limited by shares | Live |
| pTau Bio Limited | Private company limited by shares | Live |