Bedrift O - Flatåsen
- Optimec AS
- Omsorgskafèen Trondheim
- Orkdalsveien 88 AS
- Odd Forseth AS
- Olli Holding AS
- Ofe Eiendom AS
- Olena Pushkarenko
- Onshus Bygg AS
- Oterhålet Veilag
- Odyslav Bozhenko
- Ottebergsen Service
- Odd Forseth Eiendom AS
- Oeyan Invest AS Tvangsavviklingsbo
- Oeyan Invest AS Tvangsavviklingsbo
- Okken O. Bay AS
- Oromo Professionals Association In Norway
- Oromo Professionals Association In Norway