| Nimi | Paikkakunta |
|---|---|
| O.I. Ihana Oy | Espoo |
| OA Consulting Oy | Espoo |
| Oak Ventures Oy | Espoo |
| OBA TRANS | Espoo |
| Obstans Oy | Espoo |
| Ocarina Oy Ltd | Espoo |
| OCCO | ESPOO |
| Ocean Hookline | Espoo |
| Oconco Oy | Espoo |
| OD Capital Oy | Espoo |
| Odano | Espoo |
| OEAB-Invest Oy | Espoo |
| Oehlandt Energy Oy | Espoo |
| Office Manager Finland Ky | Espoo |
| Officio Oy | Espoo |
| Offshore Partners Finland Oy | Espoo |
| Ofvigo Oy | Espoo |
| OGELI BIG BAND RY | Espoo |
| Ohdake puutarha | Espoo |
| Ohjelmistokehitys T.Bergman | Espoo |
| Oieta Oy | Espoo |
| Oikarinen Hanna Maria | Espoo |
| Oikio Oy | Espoo |
| OiKukas Oy | Espoo |
| Oilwise Recycling Services Oy Ltd. | Espoo |
Yritysesittely