| KOSTA LIMITED | Private company limited by shares | Dissolved |
| HONG KONG KOSTA NETWORK TECHNOLOGY COMPANY LIMITED | | Live |
| HONG KONG KOSTA TRADING LOGISTIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOSTA INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| Kosta Electronic Technology Co., Limited | Private company limited by shares | Live |
| KOSTA TRADING LIMITED | Private company limited by shares | Dissolved |
| KOSTAH ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| KOSTANA COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOSTAR BATTERY CO., LIMITED | Private company limited by shares | Dissolved |
| KO-STAR DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| U.S.A KOSTAR GROUP LIMITED | Private company limited by shares | Dissolved |
| KOSTAR H.K. CO., LIMITED | Private company limited by shares | Dissolved |
| KOSTAR INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| KOSTAR INVESTMENTS LIMITED | Private company limited by shares | Live |
| KoStarter Limited | Private company limited by shares | Live |
| KCA (Kostas Chatzigiannis Architecture) Limited | Private company limited by shares | Live |