| Company name | Reg. code |
|---|---|
| OA OÜ | 16971846 |
| ÖÄ OÜ kustutatud | 12198852 |
| OA VARA OÜ | 16593999 |
| OA FINANTS OÜ | 11474920 |
| OA CONSULTING OÜ | 17394262 |
| VERTUSOIMEN I OÜ kustutatud (former name OÜ ÕÄ) | 12142277 |
| COFFEEMANN OÜ (former name OA Module1 OÜ) | 16732863 |
| COFFISSIMUS OÜ (former name OA Coffeeshop OÜ) | 12584756 |
| OA COFFEE AS (former name OA Coffee OÜ) | 12883571 |
| OAK & OAK OÜ | 14610713 |
| ÖÄÕ OÜ | 16571360 |
| OAH OÜ | 16737334 |
| OAK OÜ | 12598095 |
| ÕÄÖÜ OÜ | 12146097 |
| OASI OÜ | 16407324 |
| OAAS OÜ kustutatud | 11218133 |
| OAKIT OÜ | 14205906 |
| OANDU OÜ | 16935827 |
| OASIS OÜ | 11436031 |
| OAKEN OÜ kustutatud | 12907969 |
| OAÕIE OÜ | 12535982 |
| UP OAK OÜ | 12891851 |
| OAKIL OÜ | 14447029 |
| OALLOP OÜ kustutatud | 14850334 |
| OALYNK OÜ | 16529369 |
| OAKMAN OÜ | 14543201 |
| OAJAAN OÜ | 12984160 |
| OAVARS OÜ | 14585582 |
| OAKLYN OÜ | 17055175 |
| OAK ASH OÜ | 16810379 |
| BIG OAK OÜ | 16363176 |
| 77 OAKS OÜ kustutatud | 11371308 |
| OANEIE OÜ kustutatud | 14187901 |
| BLUE OAK OÜ | 12726185 |
| OAKLAND OÜ | 16876912 |
| OAKLAKE OÜ | 17398202 |
| OAKTREE OÜ | 11968503 |
| OAK AGRO OÜ | 14782242 |
| OAKSUSA OÜ (former name Salv Technologies OÜ) | 14821918 |
| OAKTAMM OÜ | 14167028 |
| OAKWOOD OÜ kustutatud | 10471232 |
| OAK&ASH OÜ kustutatud | 14875015 |
| OAKLEAF OÜ | 17464531 |
| ILU OAAS OÜ kustutatud | 12849976 |
| OAKHOST OÜ | 16131052 |
| OAKMIND OÜ | 14263298 |
| OAKSHIRE OÜ | 16735465 |
| OAKFIELD OÜ | 12655114 |
| OAKWATER OÜ kustutatud | 16794657 |
| OAKRIDGE OÜ | 10480828 |