| Company name | Reg. code |
|---|---|
| WORKGROUP OÜ (former name Studio Disain OÜ) | 12323872 |
| TA WORKGROUP OÜ | 16312575 |
| RLS WORKGROUP OÜ | 17456017 |
| ESTLAND WORKGROUP OÜ kustutatud (former name Estland Grupp OÜ) | 14380803 |
| BORTGROUP OÜ | 14523687 |
| NORDGROUP SOLUTIONS OÜ kustutatud | 12244121 |
| AO NORDGROUP OÜ | 16081561 |