| Company name | Reg. code |
|---|---|
| ORR HOLDINGS OÜ | 17408432 |
| ORG HOLDINGS OÜ | 16497014 |
| DRR HOLDING OÜ kustutatud (former name DRR Holding UÜ) | 14026635 |
| MRR45 HOLDING OÜ (former name MetRem OÜ) | 14342081 |
| ORG HOLDING GROUP OÜ | 14699920 |
| AIRION TECHNOLOGIES OÜ (former name RR Holding & Management OÜ) | 17179440 |