| Company name | Reg. code |
|---|---|
| GRUGA OÜ | 17065908 |
| KOLOMARD GRUPA OÜ (former name GF Instrumendid OÜ) | 11699701 |
| GRUIA PLOPIROR OÜ kustutatud (former name ZUZA Project OÜ) | 11860585 |
| RGW GRUPA OÜ | 16893263 |
| DARTZ GRUPA OÜ | 11553015 |
| GRIGA OÜ | 12343768 |
| SETO RÜGÄ OÜ | 11631867 |