| Company name | Reg. code |
|---|---|
| RK OÜ | 12167722 |
| RK3 OÜ | 16426729 |
| RK4 OÜ kustutatud | 12662580 |
| RJ & RK OÜ | 14798591 |
| RK4JD OÜ | 12296856 |
| LINK RK OÜ | 10268689 |
| RK AUTO OÜ | 12170871 |
| RK LABS OÜ (former name AJAL OÜ) | 16002662 |
| RK REVO OÜ | 16454743 |
| RK TEAM OÜ | 16780046 |
| RK GOLD OÜ | 17478740 |
| RK WORK OÜ | 16891521 |
| RK MEID OÜ | 12250570 |
| RK TECH OÜ | 16832777 |
| TALI RK OÜ | 10313332 |
| RK METS OÜ | 14751885 |
| RK-CAR OÜ | 16602072 |
| RK-WELD OÜ | 17193859 |
| RK MEDIA OÜ | 14743118 |
| RK - WOOD OÜ | 12117954 |
| EETOS RK OÜ | 10281572 |
| SAARE RK OÜ | 14707045 |
| RK VARAD OÜ | 11698676 |
| RK GRUPP OÜ (former name Forber Group OÜ) | 14073221 |
| RK TRANS OÜ kustutatud | 10187560 |
| RK GROUP OÜ kustutatud | 12363375 |
| SMART RK OÜ | 17214024 |
| RK IDEED OÜ | 14068243 |
| RK AUTOR OÜ | 16625989 |
| RK NAILS OÜ | 14689376 |
| RK LASHES OÜ | 14535101 |
| RK INVEST OÜ kustutatud | 11673512 |
| RK MOVILE OÜ | 12699910 |
| RK REISID OÜ | 14163467 |
| RK METALL OÜ kustutatud | 12186056 |
| RK-GRUPP OÜ kustutatud | 14890167 |
| RK BUTIIK OÜ | 16278878 |
| RK SCOVER OÜ | 11379793 |
| RK FOREST OÜ | 12013048 |
| RK ASSIST OÜ | 17204238 |
| RK REBROC OÜ | 12812631 |
| RK SYSTEM OÜ | 12137448 |
| RK ASSETS OÜ | 16322606 |
| RK STUDIO OÜ | 17005384 |
| RK MOTORS OÜ | 14295134 |
| RK HALDUS OÜ | 14804104 |
| RK BEAUTY OÜ | 16720280 |
| RK HOTELS OÜ (former name OÜ Rüütli-Küütri) | 16177700 |
| RK ESTATE OÜ | 17456081 |
| RK TENACI OÜ | 12015604 |