| Company name | Reg. code |
|---|---|
| TKS OÜ | 12088170 |
| TKS EST OÜ | 11274212 |
| ELME TKS OÜ | 10775386 |
| TKS GRUPP OÜ kustutatud | 12824261 |
| TKS INVEST OÜ | 16381990 |
| VALTEK TKS OÜ kustutatud | 11242812 |
| TKS ARENDUSE OÜ (former name Teabekandjad OÜ) | 14849383 |
| TKS TEENUSED OÜ kustutatud | 14538022 |
| TKS KOOLITUS OÜ | 14284745 |
| TKS LOGISTICS OÜ | 16524165 |
| TKS KAUBANDUS OÜ | 10789164 |
| TKSK OÜ | 11840811 |
| TKSPORTS OÜ | 16492212 |
| TKSK SERVICE OÜ (former name Topeltruum OÜ) | 14630070 |
| TKSP HOLDING OÜ | 11761908 |
| TKSOLUTIONS OÜ | 16756220 |
| TKN OÜ | 17062838 |
| TJS OÜ | 14944532 |
| TFKS2022 OÜ | 16597158 |
| 1TAKS OÜ kustutatud | 14264760 |
| TKK OÜ | 12975758 |
| TKE OÜ | 11390760 |
| TAKS OÜ | 16362366 |
| TAS OÜ | 11973740 |
| TIKS OÜ | 14385386 |
| RKS OÜ | 10773884 |
| TKM OÜ | 12565865 |
| TKH OÜ | 12291037 |
| TCS OÜ | 16585925 |
| KKS OÜ | 12149486 |
| MKS OÜ | 14246414 |
| FKS OÜ kustutatud (former name OÜ Fred Kotkas) | 12342869 |
| TKJ OÜ | 16459344 |
| TKC OÜ | 11785659 |
| PKS OÜ kustutatud | 10449043 |
| AKS42 OÜ | 16944619 |
| THS OÜ | 12827360 |
| SKS TEHNIKA OÜ | 10873195 |
| PORTERO GKS OÜ | 17328644 |
| LKS CONSULT OÜ | 14649069 |
| TKB INTERNATIONAL OÜ | 16181363 |
| TKB CONSULTING OÜ kustutatud | 16484299 |
| TJS-TÖÖ OÜ kustutatud | 12473264 |
| TKM AUTO OÜ | 11282852 |
| TKH FOODS OÜ kustutatud | 12057815 |
| RKS KONSULT OÜ | 17414740 |
| RKS DRIVE OÜ (former name RKS Sushi OÜ) | 12875896 |
| TKDS TEAM OÜ | 17355078 |
| TAS GALERII OÜ | 14957730 |
| CROWDESTATE LKS5 OÜ kustutatud | 12987263 |