| Company name | Reg. code |
|---|---|
| ALTEUS OÜ | 14258222 |
| ALTEUS ESTONIA OÜ | 12634905 |
| ALTUS OÜ | 16620153 |
| ALTENS GRUPP OÜ (former name Biskviit OÜ) | 14313642 |
| ALTIUS TRADE OÜ | 16637389 |
| ALTIUS KR OÜ kustutatud | 12414190 |
| ALTIUS ADVISORY OÜ (former name QX Trade Group OÜ) | 12051066 |
| ALTIUS CAPITAL OÜ (former name Altius Energia OÜ) | 11951112 |
| ALTEKS PLEKKSEPP OÜ kustutatud | 11351330 |
| ALTIUS TS OÜ | 10077146 |
| ALTIUS GROUP OÜ | 17125600 |
| ALTUS HALDUS OÜ | 16696707 |
| ALTUS CENTAURI OÜ | 17371918 |
| ALTUS TEENUS OÜ | 12080470 |
| ALTUS TEHNO OÜ | 11593434 |
| ALTIUS CONSULT PARTNERS OÜ | 11518094 |
| ALTIUS BUSINESS SERVICES OÜ | 10376674 |
| NUTIMAJA OÜ (former name Altius Project OÜ) | 11338481 |
| OVISION OÜ (former name ALTUS TRADING OÜ) | 14102394 |
| ALTANUS GROUP OÜ kustutatud | 12812312 |
| ALTECO SYSTEMS OÜ | 12192625 |
| ALTEAL KAUP OÜ kustutatud | 12142047 |
| ALTEAMS EESTI OÜ | 11079571 |
| ALTEDIS EESTI OÜ | 11027350 |
| ALTECO P&P OÜ kustutatud | 14961111 |
| ALTEROS GROUP OÜ (former name Alteros Wood OÜ) | 12598681 |
| ALTERA AUTOKOOL OÜ (former name OÜ Altera SP) | 11950064 |
| BALTEUS OÜ | 12674198 |
| GAS ENERGY SOLUTIONS OÜ (former name ALTUS EST OÜ) | 14837368 |
| PT ALTUM OÜ (former name PulsTech Altum OÜ) | 14839114 |
| ATEUS OÜ | 12063046 |
| ALNOS OÜ (former name Alten OÜ) | 14100001 |
| ALFENUS OÜ | 14623489 |
| ALITUS OÜ | 17116341 |
| ALSERUS OÜ | 17419938 |
| ALEOUS OÜ | 10115247 |
| ALGERUS OÜ kustutatud | 12577472 |
| ALIKUS OÜ kustutatud | 10013529 |
| AITEMS OÜ | 10840296 |
| ALMEKS OÜ | 16906984 |
| ALLEUM OÜ | 16073716 |
| ALPEXS OÜ kustutatud | 12669062 |
| ALPIUS OÜ | 12336722 |
| ALMETS OÜ | 14155150 |
| ALREIS OÜ (former name Alrei OÜ) | 16819417 |
| ALTENT OÜ | 11012710 |
| ALTHEUM OÜ | 17069728 |
| ALTELI OÜ kustutatud | 16164620 |
| ALTRUST OÜ kustutatud | 12410996 |
| ALTERO OÜ kustutatud | 11159620 |