| Company name | Reg. code |
|---|---|
| HGK OÜ | 17193249 |
| HJK OÜ | 16063155 |
| HAK OÜ kustutatud | 10080684 |
| HHK OÜ | 16782690 |
| VGK OÜ | 12105603 |
| HGT OÜ | 17334225 |
| GGK OÜ | 12756720 |
| HÄK OÜ | 12799408 |
| LGK OÜ (former name Osaühing LGK) | 10073916 |
| HTK OÜ | 12405334 |
| HRK OÜ kustutatud | 12097306 |
| HGF OÜ kustutatud | 12708767 |
| GHK OÜ (former name Junior Shipping OÜ) | 12937887 |
| HLK OÜ | 11971630 |
| HBK OÜ kustutatud | 16702690 |
| HVK OÜ | 12634388 |
| EGK OÜ | 16661301 |
| 3HAK OÜ | 16375742 |
| TGK OÜ | 16566726 |
| HSK MEDIA OÜ | 16630393 |
| HAK GRUPP OÜ | 12926151 |
| VGK JEFOREN OÜ kustutatud | 16664892 |
| O3LGK OÜ kustutatud (former name EuroSensor OÜ) | 12931703 |
| HNK VECTRAVA OÜ | 17483155 |
| AGK ADVISO OÜ | 17174709 |
| ESTMA HGI OÜ (former name Metcom Finance OÜ) | 11343884 |
| HEK ADVISORY OÜ | 16955014 |
| LGK ATRAKTSIOONID OÜ kustutatud | 10139615 |
| HGB MANAGEMENT OÜ | 16399406 |
| HVK BUSINESS OÜ | 11638088 |
| HGV GROUP OÜ kustutatud | 16147194 |
| HJK TRAVEL OÜ | 12338425 |
| HJK TALLINN OÜ | 12165870 |
| HPK DIGITAL OÜ | 17042899 |
| HSK VARAD OÜ | 14198282 |
| HTK BÜROO OÜ | 14502136 |
| HRK STYLE OÜ | 12079024 |
| HRK CONSULT OÜ | 10503127 |
| HIIU HSK OÜ | 11394611 |
| KGK INVEST OÜ | 14377814 |
| RGK MEDIA OÜ | 14696488 |
| HRK ADVICE OÜ | 11733183 |
| HERIKA HRK OÜ | 10373373 |
| HJK SPORT OÜ | 11987788 |
| HMK ARENDUS OÜ | 14226222 |
| MGK KITCHEN OÜ | 12642560 |
| HJK PROJEKT OÜ | 14906141 |
| TGK-LINK OÜ kustutatud | 10140392 |
| HKG EESTI OÜ (former name Elenora Fashion OÜ) | 14643322 |
| MGK BUILDING OÜ (former name Aleart OÜ) | 14956825 |