Bedrift O - Finstadjordet
- Oracksport AS
- Oslo Paintball AS
- Oseth T&B
- Olaussen Fasademontering
- Ollendorff Holding AS
- Ollendorff Eiendom AS
- Oksrødkilen Hytteeierforening
- Ollendorff Trygve
- Octavio Cervantes
- Ors International AS
- Octavio Cervantes Photography
- Oseth T&B AS Tvangsavviklingsbo
- Oseth T&B AS Tvangsavviklingsbo
- Omar Ahmed Akkouh
- Osteopat Mia Syverud
- Odd Halfdan Elvebø
- Onpoint Xhedeon Mata
- Odd Edgar Kristoffersen
- Ollendorff Ragnhild Irene
- Omax Imran Farooq
- Oscars gate 19 AS
- Ole-Kristian Bergaust Thomassen
- Oslo Taxi A541 Malkiat Singh