| Company name | Reg. code |
|---|---|
| Estrus Holdings kustutatud | 11301294 |
| ESTHUS HOLDING OÜ | 12069116 |
| ESTOCS HOLDING kustutatud | 10646401 |
| ASTRUM HOLDINGS OÜ | 10783813 |
| ESTRAVEL HOLDING OÜ (former name ESTRAV HOLDING OÜ) | 12967500 |
| ESTRON HOLDING OÜ (former name Estron Holding UÜ) | 14715932 |
| CITRUS HOLDING OÜ | 10484252 |