Bedrift J - Korsvoll
- Juven AS
- Jonanor AS
- JS Kapital AS
- Jon Solberg
- Juels Konsulentbyrå
- Jakob Lothe
- Johnsrud Vannmølle
- Juel Rådgivning AS
- Jørgbu Holding AS
- Jg Consulting AS
- Jemar Holding AS
- Johnsen Muse
- Jensen Byggetjenester
- Joakim Fensholt
- Jeppe Stensland
- Jc Petersen Helse
- Jens Otto Mæhlen
- Jorunn Granholm Aarseth
- Jørgen Gustav Bramness
- Jarl Bjarne Kjelby
- Jarobygg - Jaroslaw Palus
- J. Simpson Trepleie
- Jg Design V/Gjerdi Lecrecq
- Jon Flinth Vatne Holding AS