| Company name | Reg. code |
|---|---|
| PRIMOSTAR OÜ | 10653217 |
| PRIMOSTAR TOOTMINE OÜ (former name WPMEesti OÜ) | 14552654 |
| PRIMASTOR OÜ kustutatud | 10675182 |
| PRIMATAR OÜ kustutatud (former name Primatar UÜ) | 14293313 |
| PROMOSTAR OÜ | 11551186 |
| PRAIMSTAR OÜ kustutatud | 10575405 |
| TRIMASTAR OÜ | 11511399 |
| PROTOSTAR OÜ kustutatud | 11477604 |
| PROMOSTAR MEDIA OÜ kustutatud | 14424778 |
| RIOSTAR OÜ kustutatud (former name Riostar UÜ) | 14751997 |
| E20 SERVICE OÜ (former name Promostar Group OÜ) | 11949316 |