| Company name | Reg. code |
|---|---|
| JACK OÜ | 17140343 |
| JACK19 OÜ | 14681512 |
| 910JACK OÜ kustutatud | 14546043 |
| JACK & ROSE OÜ kustutatud | 14573509 |
| RÄPINA JACK OÜ | 16718509 |
| BANKER JACK OÜ | 17278857 |
| JACK DEVANT OÜ kustutatud | 14155350 |
| ADVENTURE JACK OÜ | 16323739 |
| JACK ELEKTRIEHITUS OÜ | 11321664 |
| JACK'S IT OÜ | 14416365 |
| VIIU JA JACK OÜ | 16220123 |
| JACK JA BARBOSSA OÜ kustutatud | 12320833 |
| JACK WABBIT COMMUNICATIONS OÜ kustutatud | 12547034 |
| JACK OF ALL TRADES OÜ | 16307568 |
| JACK BUTLER MIDDLETON CAPITAL OÜ | 16590015 |
| EASY ACCESS SOLUTION OÜ (former name Jack-Steel) | 12835402 |
| JUNGLE JACKS OÜ kustutatud | 11388929 |
| JACKE ÄRIKESKUS OÜ kustutatud | 10336971 |
| JACO OÜ (former name OÜ Balkan Partner) | 12044391 |
| KUTSAPUHVET OÜ kustutatud (former name Jacks Lighters OÜ) | 14492490 |
| JACE TECH OÜ | 14185782 |
| DESIGNING JACQ OÜ kustutatud | 16269796 |
| JACKAL OÜ | 11004834 |
| JACKEST OÜ | 16826966 |
| JACKROMI OÜ (former name Montreco Invest OÜ) | 14994501 |
| JACKIECC OÜ | 16990005 |
| JACKFORCE OÜ | 16256032 |
| JACKRABBOT OÜ kustutatud (former name Frederik Goossens OÜ) | 14336330 |
| JACKSON SCG OÜ (former name Entertainment Plus OÜ) | 14328603 |
| JACKFISHING OÜ | 16341988 |
| JACKPOTDEAL OÜ | 16038140 |
| JACKPOT MEDIA OÜ | 16461460 |
| JACKDAW SERVICES OÜ | 17233702 |
| JACKAL TECHNOLOGIES OÜ | 17158975 |
| MKUSHI LUKOSHI OÜ kustutatud (former name Jackie Estonia OÜ) | 16548852 |
| RORYART OÜ (former name Jackdisain OÜ) | 12866851 |
| MONTECH OÜ (former name Jackhammer OÜ) | 14814887 |
| JAHK OÜ | 16822552 |
| ZACK OÜ | 12354513 |
| JANK OÜ kustutatud | 10354791 |
| JÄTK OÜ | 16906101 |
| JÄÄK OÜ | 16575346 |
| JAIK OÜ (former name Von Krahli Majad OÜ) | 14388806 |
| RACK OÜ | 11949109 |
| ACK2021 OÜ | 16156900 |
| ZACK PETTERSSON OÜ | 17350856 |
| PACK EXPERT OÜ | 14921212 |
| M-PACK OÜ kustutatud | 11509652 |
| RENT PACK OÜ kustutatud | 16448636 |
| FULL RACK OÜ kustutatud | 14597705 |