| Company name | Reg. code |
|---|---|
| ALTMER OÜ | 12190431 |
| ALTMER EHITUS OÜ | 14891416 |
| ALTMER ENERGY OÜ (former name Kaevuri Hostel OÜ) | 14263861 |
| ALTMED OÜ | 12997211 |
| ALTER OÜ kustutatud | 12935760 |
| ALTMAR GRUPP OÜ | 14211887 |
| ALTAMER INVEST OÜ | 11594190 |
| ALTER ENERGY OÜ | 16960274 |
| ALTER TRUST OÜ | 16507824 |
| ALTER BREWERY OÜ | 17305465 |
| ALTER FOUNDATION OÜ | 16193320 |
| ALTER GECKO OÜ | 14999544 |
| TUUDUR ALTER OÜ | 10497639 |
| ALTER BALTICS OÜ | 12026341 |
| ALTER GROUP OÜ (former name Osaühing Alter Electric) | 10167942 |
| ALTER.ESTATE OÜ | 16880859 |
| ALTER SECURITY OÜ | 12492416 |
| GLOBAL ALTER GROUP OÜ kustutatud | 16059573 |
| SEARIVERLOG OÜ kustutatud (former name Alter Energia OÜ) | 14474026 |
| ROBAT MAHELA OÜ kustutatud (former name Alter Holding OÜ) | 14065919 |
| LAOTEHNIKA OÜ (former name Parkize OÜ) | 16025255 |
| ALEMER OÜ | 10806000 |
| ALOMER OÜ | 12098582 |
| ALMER OÜ kustutatud | 14313984 |
| ALTERA AUTOKOOL OÜ (former name OÜ Altera SP) | 11950064 |
| ALTAIR BREATH OÜ (former name Altair Travel OÜ) | 10860241 |
| ARTMER RPT OÜ | 12852027 |
| BALTMER MÖÖBEL OÜ | 17395698 |
| BALTMER COMPANY OÜ (former name Baltmer Company UÜ) | 14176151 |
| WALTMER PROJEKT OÜ | 11626814 |
| ASTMER GRUPP OÜ | 14180342 |
| BALTMER CONSULT OÜ | 10902092 |
| ALMER KÜTUS OÜ kustutatud | 10313438 |
| ALMER HOOLDUS OÜ | 10964905 |
| ALMER TEXTILE OÜ | 16934638 |
| AETHER OÜ | 16641528 |
| ALEMAR OÜ | 14291076 |
| ALIGER OÜ | 11219523 |
| ALETER OÜ | 11777074 |
| ALIŠER OÜ | 12658804 |
| ADAMER OÜ kustutatud | 11075550 |
| ALACER OÜ kustutatud | 11785151 |
| ALIMED OÜ | 16251661 |
| ALIMIR OÜ | 14747174 |
| ALEVER OÜ | 16958107 |
| ALIMPER OÜ | 11166241 |
| ALAMEA OÜ | 14282226 |
| ALFAMER OÜ | 16977783 |
| AITHER OÜ (former name OÜ Aither) | 11271452 |
| ALIMAR OÜ | 14185948 |