Bedrift J - Røyse
- Jovana
- Jacobsen Fysioterapi
- Jordal Design
- Jk Eiendom AS
- Jan Haukedalen
- Jonny Tuvsjøen AS
- Joca Holding AS
- Jøsil Eiendom AS
- Jh Drift DA
- Joy-Time
- Jordan-Johnsen
- Jahr Tech
- Jordmor Snoen
- Jaro Holding AS
- Jansons Legat
- Joy-Time
- Jacek Kullanda
- John Fekjær
- Jan Smola
- John Dæhli
- Jma Maskindata AS
- John Reidar Strand
- Jon E. Rogne AS
- Jon Tveiten Skuterud
- Jørn Kristian Ullern
- Jakub Szymon Rejnin
- J.K. Utleie AS
- J.K. Invest AS
- J.K. Utvikling AS
- Jensen Ole Andres
- Jaroslaw Mieczyslaw Huszcza
- J.P.R. Holding AS
- Jørgen Ullern Bygg & Anlegg AS
- Jan Haukedalen Transport og Service