Bedrift O - Skollenborg
- Ole Kjørstad
- Oreholt Holding AS
- Olav Hedenstad
- Olav Aandstad
- Odd Arne Kornrud
- Odden Magne Edvin
- Ole Steffen Andersen
- Ole Anton Sending
- Ole- Kristian Bjerknes
- Omholt Odd Harry
- Odd Håvard Odden
- Oslo Prosjekt Consult AS
- Odins Ravner Mc
- Odd Frode Johannessen
- OK Minilager Kongsberg
- Odins Ravner Mc
- Ole E Teigen Magnussen
- Okanagan Wine Import Thoresen