| Company name | Reg. code |
|---|---|
| IKK HOLDING OÜ | 11371691 |
| BKK HOLDING OÜ | 12615474 |
| NKK HOLDING OÜ | 12453480 |
| IDKK HOLDING OÜ kustutatud | 12961816 |
| KIK HOLDING OÜ | 17223572 |
| KKK INVEST&HOLDING OÜ kustutatud | 14497903 |
| Litegrav Bio Holdings OÜ (former name Dersan Holding OÜ) | (asutamisel) |