| Company name | Reg. code |
|---|---|
| ULTRALINE OÜ kustutatud | 12511792 |
| ULTRALINE HOLDING OÜ | 11951508 |
| VÕSAVENNAD OÜ (former name Ultralines OÜ) | 16236459 |
| ULTRATONE OÜ kustutatud | 12020611 |
| ULTRAPIPE INTERNATIONAL OÜ (former name Fluxforty OÜ) | 14301834 |
| INTRALINE OÜ kustutatud | 11123958 |
| PLURALINE OÜ kustutatud | 12190230 |
| ULLALINE OÜ | 12070939 |
| ELTALINE OÜ | 14600867 |