| Company name | Reg. code |
|---|---|
| GERMOSTAR OÜ (former name Germostar UÜ) | 12872142 |
| GERMASTER OÜ kustutatud | 12841532 |
| TERMOSTAR OÜ | 16461111 |
| VERBOSTAR OÜ kustutatud | 10853583 |
| BERLOSTAR OÜ | 10958425 |
| A-TERMOSTAR OÜ | 10541205 |
| DEMOSTAR OÜ | 10652034 |
| ZEROSTAR OÜ kustutatud | 14288068 |
| TERMSTAR OÜ | 12835098 |
| HEROSTAR GRUPP OÜ kustutatud | 11225084 |
| SOAPMAKER OÜ (former name ErmoSaar OÜ) | 17062488 |
| HUPROKI PAIGALDUS OÜ (former name EV-Estonia OÜ) | 12744757 |