| Company name | Reg. code |
|---|---|
| TJK OÜ | 12393200 |
| TJK WORKS OÜ kustutatud | 12682683 |
| TJK VENTURES OÜ | 16533550 |
| TIK-TAK OÜ | 10296562 |
| TUK-TUK OÜ kustutatud | 12095796 |
| HJK OÜ | 16063155 |
| TJS OÜ | 14944532 |
| TJR OÜ kustutatud | 12371210 |
| TKK OÜ | 12975758 |
| CJK OÜ (former name UÜ CJK) | 12524913 |
| TBK OÜ kustutatud | 12197692 |
| KJK OÜ kustutatud | 11917345 |
| TDK OÜ | 16622040 |
| TOK OÜ | 14303129 |
| TGK OÜ | 16566726 |
| TLK OÜ (former name TT Academy OÜ) | 11062234 |
| TRK OÜ | 10831601 |
| TPK OÜ | 17024938 |
| JTK OÜ | 10195068 |
| TJT OÜ | 12252273 |
| TYK OÜ | 17196438 |
| TKJ OÜ | 16459344 |
| TVK OÜ | 14763693 |
| TLK+1 OÜ kustutatud | 14283065 |
| EJK OÜ | 16841351 |
| TKJK CONSULT OÜ | 14234813 |
| TKJK INVEST OÜ | 14928852 |
| TJO KONSULTATSIOONID OÜ | 10375741 |
| TMK CONSULTING OÜ kustutatud | 14739461 |
| TLK LAB OÜ | 16263173 |
| TRK CONSULTING OÜ | 14832000 |
| TJT INVEST OÜ | 11661058 |
| LJK STUDIOS OÜ kustutatud | 16343433 |
| DJK CONSULT OÜ kustutatud | 12878624 |
| TFK INVESTMENTS OÜ | 16988108 |
| TFK HOLDINGS OÜ | 16988539 |
| TSK TRADE OÜ | 12770370 |
| TJS-TÖÖ OÜ kustutatud | 12473264 |
| TLK INVESTMENTS OÜ | 16468159 |
| TLK PRIVAAT OÜ | 12470969 |
| TKJK HOLDING OÜ | 17041687 |
| JTK ENTERTAINMENT OÜ | 16931440 |
| TBK LAHENDUSED OÜ | 14318697 |
| KJK GRUPP OÜ kustutatud | 12203866 |
| HJK TRAVEL OÜ | 12338425 |
| TRK INVEST OÜ | 16568725 |
| TEK MANAGEMENT OÜ (former name Uptick trade systems OÜ) | 14614177 |
| AJK & SONS OÜ | 12808782 |
| TEK HOLDING OÜ | 16082164 |
| TTK ASSETS OÜ | 16574453 |