Bedrift J - Kjelsås
- Joamar AS
- Jovian AS
- Joveig AS
- Josevo AS
- Joranor AS
- Jotinor AS
- Jarek AS
- Jec AS
- Jærhagen Holdbart
- Jacob Less
- Jon Hanekamp
- Jlf Invest AS
- Jgb Eiendom AS
- Join Consulting AS
- Jens Gundersen A/S
- Joker Kjelsås
- Janne Hansen
- Jphs Invest AS
- Jon Sandvand AS
- Jon Skurdal
- Jensen Consulting
- Johansen Kultur
- Johan Siqveland
- Julie Oredam
- Julie Moviken
- Jørgenvaag Donutplug
- Julie Bodahl
- Julie Bodahl
- Jensen Tind
- Johnny Singh
- Joly Nueva
- Johannes Hvidsten
- Ja Industrier AS
- Jeløy Ingeniørforretning AS
- Jeffrey Scott Engberg
- J.Harøy Fysioterapi
- Johan Helland - Musiker
- Janne Helen Skranes
- Jan-Erik Hybertsen
- J. K. Holding AS
- John Erik Kaada
- Jon Cederbrand Arkitektur AS
- Johs Bjerke Elektro DA
- James Newell Unbounded
- Johanne Moen Jensen
- Johnsen Ingunn Vold
- Jens Lauge Sørensen
- Jørn Are Vigestad Berge AS
- John-Arne Ø. Gundersen
- Jchristiansen Consulting Jan Christiansen
- Jon Sindre Fjellvang Klonteig
- Julius & Ørenberg Bokbinderi
- Julina Andersen Kahavidanalage Don
- Julie Nikoline & Alfred Angel AS
- Jcn Media Joachim Corneliussen Nilsen
- Jms Measurements Jaroslaw Marek Majchrzak
- Journalist og Fotograf Marte Nordahl