| Nimi | Paikkakunta |
|---|---|
| One Entity Oy | Helsinki |
| One Eyed Spirits Holding Oy | Helsinki |
| One House | Helsinki |
| One Plus Three Oy | Helsinki |
| One Thousand Flavours | Helsinki |
| One Up Media | Helsinki |
| One Wheel Ads | Helsinki |
| One-Service Oy | Helsinki |
| One4All Finland Oy | Helsinki |
| OneCompany Consulting Oy | Helsinki |
| OneFrameCinema | Helsinki |
| OneGuest Oy | Helsinki |
| Oneiric Oy | Helsinki |
| onespirit-productions | Helsinki |
| ONH Service Oy | Helsinki |
| onionfish design | Helsinki |
| Onkija Oy | Helsinki |
| Onkiva Oy | Helsinki |
| Online HPLC Oy | Helsinki |
| Online Tools LC Oy | Helsinki |
| Onnela Consulting | Helsinki |
| Onnellinen Aurinko - Mutlu Gunes Oy | Helsinki |
| Onnellinen Tiikeri | Helsinki |
| Onnelliset tmi | Helsinki |
| Onnellisten heimo | Helsinki |
Yritysesittely