| Company name | Reg. code |
|---|---|
| MRR45 HOLDING OÜ (former name MetRem OÜ) | 14342081 |
| MRO HOLDING OÜ kustutatud | 16712381 |
| MRM HOLDING OÜ | 17218967 |
| MAR HOLDING OÜ kustutatud | 16253714 |
| DRR HOLDING OÜ kustutatud (former name DRR Holding UÜ) | 14026635 |
| MLR HOLDING OÜ | 10631262 |
| SINCOBELE VELTEREDE OÜ (former name MLR Holding) | 11233084 |
| AIRION TECHNOLOGIES OÜ (former name RR Holding & Management OÜ) | 17179440 |