| Firma nimi |
|---|
| Oneself OÜ |
| OneWood OÜ |
| Onia Original Idea OÜ |
| ONNINEN AS |
| Ontic OÜ |
| Onyxia OÜ |
| Ooloom Likes You OÜ |
| OPTIMA BALTIC OÜ |
| Optimera Estonia AS |
| ORAK OÜ |
| Organia OÜ |
| Orien Trade OÜ |
| Oriens OÜ |
| Orkla Eesti AS |
| Orto AS |
| Firma nimi |
|---|
| Oneself OÜ |
| OneWood OÜ |
| Onia Original Idea OÜ |
| ONNINEN AS |
| Ontic OÜ |
| Onyxia OÜ |
| Ooloom Likes You OÜ |
| OPTIMA BALTIC OÜ |
| Optimera Estonia AS |
| ORAK OÜ |
| Organia OÜ |
| Orien Trade OÜ |
| Oriens OÜ |
| Orkla Eesti AS |
| Orto AS |