| Ettevõtte nimi | Reg. kood |
|---|---|
| QUESTANO OÜ | 16466172 |
| QUESTART OÜ | 14650115 |
| QUESTALL OÜ (endine nimi Questall UÜ) | 12947644 |
| QUESTAE OÜ | 14987257 |
| QUESTALL CAPITAL OÜ kustutatud (endine nimi Questall Capital UÜ) | 12947673 |
| QUESTALL GROUP OÜ (endine nimi Questall Group UÜ) | 14347150 |
| QUESTING SERVICES OÜ kustutatud | 17009399 |
| ULTIMATE QUESTION OÜ | 16401876 |
| QUESTION MANAGEMENT OÜ | 17063192 |
| QUESTRO ANALYTICS OÜ | 12836413 |
| NORD TAK & BYGG TEKNIK OÜ (endine nimi Questall Group OÜ) | 14065842 |
| WINEBUDDI OÜ (endine nimi Questall Service OÜ) | 14076337 |