Bedrift O - Heggedal

• Oreon AS
• Orangeriet AS
• Onedoc AS
• Orangeriet AS
• Operasjonssykepleier Auset
• Orefellen Consulting
• Oslo Gitarklubb
• Om Gundersen
• Oliva Holding AS
• Oceans Interactive AS
• Oslo Trebåtbyggeri AS
• Ole Eldar Kjølen
• Ole Fredrik Haugstad
• Ole Jonny Grønbrekk AS
• OK Minilager Heggedal
• Organisation for Human Rights And Justice In Ethiopia (Ohje)