Bedrift O - Bjugn
- Olmi AS
- Otto Aslaksen
- Onkel Mats AS
- O3 Service AS
- Olav Johansen
- Oddmund Groven AS
- Odds Firma
- Oem Havfiske AS
- Odd Arne Eide
- Oddmund Groven Eiendom AS
- Oddmund Groven Invest AS
- Oddmund Groven Holding AS
- Oem Brunhuset Holding AS
- Oddvar Dagfinn Brungot
- O.E.M Eiendom AS
- O.E.M Eiendom AS
- O.E.M Fiske AS
- Ole Jakob Hammertrø Husbyggarn AS -
- O I Jensen Sport1
- Okb-Kajakk Ole Kristian Brendøy
- Oddmund Groven Pukkverk & Maskinstasjon Oddmund