Bedrift O - Huseby

• Ortis AS
• Othelius AS
• Oslo Orlogsforening
• Omega Invest AS
• Omega Eiendom AS
• Owesen Invest AS
• Owesen Eiendom AS
• Owesen Venture AS
• Oslo vestre Sportsskyttere
• Oslo Garnisons Pistolklubb
• Oslo Gynekologiske Forening
• Oslo og Akershus Eiendom AS
• Oslo & Omegn Fasadevask AS