Bedrift I - Grålum
- Isy DA
- Itre AS
- Isea AS
- Infotjenester AS
- Integrera AS
- Infraservice AS
- Isfritt AS
- Isac Ghenadi
- IcopalTak Avd Østfold
- Ingeniør Aaker
- Inspiria Utvikling AS
- Img Invest AS
- Img Consilio AS
- Ireneusz Braszkowski
- Infratek Elsikkerhet AS
- Inspiria Eiendom AS
- Idrettslag Tune
- If Skadeforsikring
- Interiørarkitekt Trine Davidsen
- Inspiria Science Center AS