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