Firma O - Skjetten
- Orogenic AS
- Oecona AS
- Olavsgaard Drift AS
- Olavsgaard Næringsbygg AS
- Orange Gaming AS
- Olavsgaard Gruppen AS
- Opas Kreditt AS
- OBO Bettermann
- Oslo Automatgear AS
- Olavsgaard Næringspark AS
- One World AS
- Onstad Jørn
- Olavsgaard Eiendom AS
- Olsen Varetransport
- Outsearching.Com AS
- Ow Eiendom AS
- Offshore Constructor AS
- Oslo Overflateteknikk AS
- Oslo Høytrykksvask AS
- Olav Garlie
- Oslo Markise AS
- Osan Consulting
- OBRON Sørøst
- Otto Olsen Skipsinvest AS
- Olsen Stian Alexander
- Olavsgaard Hotell Eiendom AS
- Olav Morten Haug
- Odd Glasø Knutsen
- Oslo Transport Iqbal
- Otto Olsen Eiendom AS
- Oslo Akershus Brytekrets
- Otto Olsen Boligutvikling AS
- Oslo og Akershus Kaninavlsforening
- Omran Ahmed Sharafeldien Adam
- Onninen Express Hvam, Skjetten
- Opsahl & Osland Miljøkonsult DA
- Olaf Gjesti & Sønn AS
- Oslo Snekker Service Celal Emami
- OBOS Block Watne Viken Nord
- Ole Martin Kolbjørnshus Viser og Vers
- OBOS Block Watne AS Avd Viken nord 26440