| Ettevõtte nimi | Reg. kood |
|---|---|
| JKF OÜ | 16205402 |
| JKF DIGITAL OÜ | 16837728 |
| JKT OÜ | 17120323 |
| JLF OÜ | 14935556 |
| AKF OÜ | 11932037 |
| JKV OÜ | 14367276 |
| JKL OÜ | 12611447 |
| LKF OÜ | 17141584 |
| JKP OÜ | 17560803 |
| RKF OÜ | 16046895 |
| JPF OÜ | 14194433 |
| JKG OÜ | 12343165 |
| JKO OÜ | 11045980 |
| NKF OÜ kustutatud | 14070903 |
| JKM OÜ kustutatud | 10050588 |
| JKA OÜ kustutatud | 16280349 |
| JKV COMPANY OÜ | 14696726 |
| AKF AUTOMAATIKA OÜ (endine nimi osaühing AKF EDITOR) | 10883555 |
| JKMF INVEST OÜ | 12854167 |
| JKR VENTURES OÜ | 14453975 |
| JKK INVEST OÜ | 14562670 |
| TKF MANAGEMENT OÜ | 17516268 |
| JEF INNOVATIONS OÜ | 12910210 |
| MKF HALDUS OÜ | 11246655 |
| JEF HOLDING OÜ | 11185327 |
| JAF ZG OÜ | 10429247 |
| SKF-MASSAGE OÜ | 17588322 |
| JKP PROJEKTID OÜ (endine nimi Tartu Liikluslinnak OÜ) | 14051455 |
| JKL MEDIA OÜ | 16905884 |
| JKH CAPITAL OÜ (endine nimi J&K Kaubandus OÜ) | 14016051 |
| JKL EENSALU OÜ | 16786907 |
| LKF DEMOL OÜ | 14024323 |
| JKL TRUST OÜ | 14451947 |
| JEF BREWERY OÜ | 17400407 |
| JKT3CH OÜ | 17190743 |
| SKF ESTONIA OÜ | 11254947 |
| JKA HOLDING OÜ | 12853860 |
| JKE SERVICE OÜ | 14131645 |
| JMF INSTALL OÜ | 14357898 |
| JKM CONSULTING OÜ | 17455638 |
| JKR SOLUTIONS OÜ | 16267136 |
| LKF KULLER OÜ | 11220147 |
| JKL PROJEKT OÜ | 11158649 |
| JKR & CO OÜ | 16849430 |
| JKT METALL OÜ | 14076320 |
| JKN ESTATE OÜ | 17074238 |
| JKJ GRUPP OÜ | 16944803 |
| JKM TITANIUM OÜ | 14484562 |
| GKF COACHING OÜ | 17440826 |
| JKR SAILING OÜ | 16781597 |