| Company name | Reg. code |
|---|---|
| EXTRONE OÜ (former name Extrone UÜ) | 14139032 |
| EXTORNO OÜ | 11114971 |
| EXTRADE OÜ kustutatud | 12187089 |
| EXTRANET OÜ | 10979640 |
| EXTRAZONE OÜ | 10680935 |
| EXTRUDE OÜ | 17003304 |
| EXTREME OÜ | 14921761 |
| EXTROM OÜ | 10904085 |
| EXTREN OÜ | 10961232 |
| EXTREME LAND OÜ | 11292129 |
| MANOREX EXTREME OÜ kustutatud | 10859798 |
| EXTRAZONE LOGISTICS OÜ | 17442251 |
| EXTREME BALTIC OÜ | 12504042 |
| ALHO-EXTREME OÜ kustutatud | 11595189 |
| JET EXTREME OÜ (former name Jet Exstreme OÜ) | 14254678 |
| EXTREME EVENTS OÜ kustutatud | 11695850 |
| EXTREME SERVICES OÜ | 14321759 |
| RENT EXTREME OÜ | 12893471 |
| EXTREME DREAM OÜ kustutatud | 14050131 |
| EXTREME WORKS OÜ | 11001184 |
| EXTREME SOUND OÜ | 14641961 |
| EXTREME WHITE OÜ kustutatud (former name CENTER SALON OÜ) | 14255838 |
| HTC-EXTREME OÜ kustutatud | 12716318 |
| EXTREME CATERING OÜ kustutatud | 12406026 |
| EXTREME ART OÜ | 14668859 |
| EXTREME ROAD OÜ | 12896585 |
| EXTREME CAPITAL OÜ kustutatud | 11284161 |
| EXTREME MOVEMENT OÜ | 10061576 |
| EXTON WOOD OÜ (former name OÜ Ekland Group) | 11121103 |
| EXTON TEENUSED OÜ | 12214835 |
| EXTON GRUPP OÜ | 10979901 |
| ESTRONE OÜ kustutatud | 11063297 |
| PETRONE & PETRONE OÜ | 12983278 |
| CITRONE OÜ kustutatud | 12051356 |
| ELTRONEX OÜ | 14483433 |
| VEXTRON OÜ | 17477373 |
| ENTRINE OÜ | 14494017 |
| ESTDRONE OÜ | 14269987 |
| EXPRONET OÜ | 14854023 |
| ESTROSE OÜ | 11052738 |
| ENTRYONE OÜ | 14536017 |
| OXIRONE OÜ (former name Oxiron OÜ) | 14016982 |
| FENTRONE OÜ kustutatud (former name Clavados OÜ) | 14044981 |
| ESTRONET OÜ (former name Estronet UÜ) | 14200582 |
| NEXTRON OÜ | 16021797 |
| INTRONE OÜ | 11543608 |
| RETRONE OÜ (former name Retrone UÜ) | 14165087 |
| NEXTONE OÜ | 16808170 |
| EHITUSABILINE OÜ (former name Extreme Buildings OÜ) | 12099009 |
| ESTONE OÜ | 16608985 |