| Company name | Reg. code |
|---|---|
| CITIDEAL OÜ | 11682209 |
| CITADEL HOLDING OÜ (former name Dellago OÜ) | 14144599 |
| CITADEL TRADING OÜ kustutatud | 12083646 |
| DIGITAL CITADEL OÜ | 17198118 |
| CITADEL INVEST GRUPP OÜ kustutatud | 12376288 |
| DIGIDEAL OÜ | 16932272 |
| CMTIDEA OÜ | 14823573 |
| DIGIDEAL INVESTMENT OÜ kustutatud | 16134292 |
| SYNHOLDINGS OÜ (former name Citadel Consulting OÜ) | 12754164 |
| DATA SOLUTIONS OÜ (former name Datavalve OÜ) | 14055418 |