| Company name | Reg. code |
|---|---|
| ULTRANORD OÜ (former name Ultranord UÜ) | 17311388 |
| ULTRAFORM OÜ | 12764004 |
| ULTRACORE OÜ kustutatud (former name Ultracore UÜ) | 14031174 |
| ULTRAWOOD OÜ kustutatud | 16454594 |
| EXTRANORD OÜ (former name Extranord UÜ) | 14135896 |
| HÜPERTEOS OÜ (former name OÜ Ultrabold) | 12900660 |