| Nimi | Paikkakunta |
|---|---|
| Oceido Oy | Helsinki |
| Ocet International Oy | Helsinki |
| Octahed Oy | Helsinki |
| Octante Oy | Helsinki |
| Odco Oy | Helsinki |
| Odds Intelligence | Helsinki |
| Ode to Music | Helsinki |
| ODE-Holding Oy | Helsinki |
| Odenkirk Oy AB | Helsinki |
| OdenOikut | Helsinki |
| ODILON Oy | Helsinki |
| ODM House Oy | Helsinki |
| ODYSSEUSPENELOPE | Helsinki |
| Oehlandt & Co Oy | Helsinki |
| Off Consult Oy | Helsinki |
| OFF ROAD PROMOTION & MANAGEMENT Oy | Helsinki |
| OFFBEAT Helsinki | Helsinki |
| Offerbridge OY | Helsinki |
| Office Deli Oy | Helsinki |
| OFFICIAL FINNISH HAWKWIND ASSOCIATION RY | Helsinki |
| Offside Productions | Helsinki |
| Ofisea Oy | Helsinki |
| Oförsagd / tvoo | Helsinki |
| OGELIA | HELSINKI |
| Ogelin Hammaslääkärit Oy | Helsinki |
Yritysesittely