| Company name | Reg. code |
|---|---|
| STUDIO LINGUA OÜ | 11045187 |
| LINKUP STUDIO OÜ | 16585988 |
| AURASYSTEMS OÜ kustutatud (former name Lingvo Studio OÜ) | 14349396 |
| LIGNUM ART STUDIO OÜ | 14464004 |
| LINEA STUUDIO OÜ (former name Sonnschein OÜ) | 14973930 |
| STUUDIOLINE OÜ (former name Inga Koppel Stuudio OÜ) | 12408212 |