| Company name | Reg. code |
|---|---|
| JZTK OÜ | 12677311 |
| JÄTK OÜ | 16906101 |
| JTK OÜ | 10195068 |
| JTK ENTERTAINMENT OÜ | 16931440 |
| JTK INVEST OÜ | 16155578 |
| JTK LOUHINTA OÜ kustutatud (former name Triosale OÜ) | 14085520 |
| JTK ULTRADE GROUP OÜ | 14786139 |
| JTK TRANSPORT SERVISE OÜ | 16224598 |