Bedrift O - Rolvsøy
- Olaj
- Oredalshagen AS
- Ombergsvingen Garasjebryggeri
- Omberg Eiendom AS
- Ohg 37 AS
- Ordsmien Dale
- Oredalstunet Velforening
- Oredalstunet Velforening
- Olafsen Invest AS
- Omberg Racing
- Omberg Racing
- Omberg Invest AS
- Omberg Holdingselskap AS
- Oliviaklinikken, Myklebostad
- Oskar Rostad
- Op Mikalsen Transport AS
- Op Mikalsen Transport
- Op Mikalsen Transport
- Oceaneering Asset Integrity
- Ole Petter Andersen
- O-R Åkeberg
- Olnationz Nwonwu Services
- Odd Ivar Gjersvik
- OK Minilager Rolvsøy
- Ole-Henrik Ringstad
- Osteopat Line Therese Olsen
- Odins Spear Krystian Szczepanski
- O.F Transport Limited
- Olavesen Rør og Sveis
- Ole-Henrik Kaspersen Olsen
- Osteopat Sarah Bringa Lindberg D.O.