Bedrift I - Rolvsøy
- Ilia AS
- Ipoa AS
- Ipro Bygg AS
- IT Vakttelefon
- Ingeniørfirma Big AS
- Initiativ Hauge
- Imte Eiendom AS
- Installatøren Holding AS
- Installatøren Fredrikstad AS
- Installatøren Gruppen AS
- Interline Europe AS
- IKM Inspection AS
- Initiativ Hauge
- Infocus International Bv
- Issam Alhassan
- Iunita Tudurel
- Iversby Holding AS
- Ilj Holding AS
- Irene Skår
- Ifratelli Eiendom AS
- Invest-Auto AS
- Iversby Eiendom AS
- Inge Schjerpen
- Innova Abrahamsen
- Iceme Nordic Hage
- Idrettens Studieforbund Østfold
- Idris Arif Abdullah
- Influencer Services Fossaas
- Ibeta Håkon Sandmark
- Inger Lise Wendelbo
- Istrefaj Bygg AS Konkursbo
- Istrefaj Bygg AS Konkursbo
- Inger Hegna Gabrielsen
- Ingerid Grimsæth Yoga
- Igniva Christian Seilø Torgersen
- International Bzt Companys Online AB
- Import & Export Hamzaoui
- Idg Fredrikstad Comunity Hub
- Idg Fredrikstad Comunity Hub
- Indica Mihi - Fortell Meg
- Indica Mihi - Fortell Meg
- ISS Facility Services AS Avd Transcom Fredrikstad
- Iggys Tattoo - Marius Sten Larsen
- Insider Facility Solutions AS Kantine Fredrikstad Postterminal