| Aass Maskinservice AS | Construction | 2005 |
| Alexander Karlsen AS | Construction | 2010 |
| Andre Johansen Holding AS | | 2019 |
| Arkitekt Og Design Tjenster AS | Professional & scientific | 2015 |
| Armstrong Holding AS | | 2023 |
| Askeli AS | Agriculture & fishing | 2016 |
| Atlas Services AS | Real estate | 2005 |
| Avb Aktiv AS | | 2024 |
| Avb Holding AS | Real estate | 2005 |
| Bella Holding AS | Real estate | 2005 |
| Berger Holding AS | Hospitality | 2015 |
| Bergheim KS2 AS | Real estate | 2021 |
| Bergheim KS3 AS | Real estate | 2021 |
| Bergheim KS4 AS | Real estate | 2021 |
| Bergheim KS8 AS | Real estate | 2023 |
| Bergheim Syd AS | Real estate | 2015 |
| Bergheimsvingen AS | Real estate | 2023 |
| Beroma AS | Wholesale & retail | 2004 |
| Bic Eiendom AS | Real estate | 2020 |
| Bolig Scan AS | | 2021 |
| Bossum Drift AS | | 2021 |
| Bossum Maskin AS | Construction | 2014 |
| Braathen Trading AS | Wholesale & retail | 2005 |
| Bygge AS | Construction | 2017 |
| Byggmester Forsetlund AS | Construction | 2012 |
| Cecbek Holding AS | | 2025 |
| Clano AS | Wholesale & retail | 2019 |
| Clarvia AS | Information & communication | 2025 |
| Cool Factory AS | Health & social care | 2020 |
| Datatech Ans | Wholesale & retail | 1996 |
| Do IT AS | Information & communication | 2025 |
| Ecommerce Thomas S Pettersen Og Ketil Skauen Da | Information & communication | 1999 |
| Entitet AS | Information & communication | 2014 |
| Erbjo Invest AS | | 2022 |
| Fagfolkguiden.No AS | Information & communication | 2026 |
| Faj Capital Ltd Nuf | Information & communication | 2008 |
| Feedpro AS | Manufacturing | 2024 |
| FG Mesterbygg AS | Construction | 2024 |
| FHW Invest AS | Real estate | 2013 |
| Finance Resources Toa AS | Professional & scientific | 2015 |
| Fjordkapp Invest AS | | 2025 |
| Flowphys AS | Professional & scientific | 2010 |
| Foor AS | Manufacturing | 2024 |
| Forsetlund Eiendom AS | Real estate | 2011 |
| Fredrikstad Boligforvaltning AS | Professional & scientific | 2020 |
| Fredrikstad Golfpark AS | Arts & recreation | 1999 |
| Gigasats AS | Information & communication | 2025 |
| Gini Eiendom AS | Real estate | 2022 |
| Glemminge AS | Real estate | 2019 |
| H.H.H AS | | 2024 |
| Habil Holding AS | Real estate | 2005 |
| Hagle Eiendom AS | Real estate | 2021 |
| Hagle Holding AS | Real estate | 2021 |
| Hagles Eiendommer AS | Real estate | 1982 |
| Havvikollen Va SA | Water & waste | 2011 |
| Heiro AS | Wholesale & retail | 2005 |
| Helmaks Bygg AS | Construction | 2023 |
| HH Bygg AS | Construction | 2021 |
| HM Stranda Invest AS | Wholesale & retail | 2015 |
| Homco AS | Professional & scientific | 2022 |
| Horgen Eiendom AS | Real estate | 2003 |
| Horgen-Gruppen AS | | 1931 |
| Huseby & Hankø Golfbane AS | Arts & recreation | 2003 |
| Husløs Bussgarasje Da | Real estate | 2021 |
| Hvaler Golfbane AS | Arts & recreation | 2000 |
| Hyttefeber AS | Wholesale & retail | 2015 |
| Høm Holding AS | Professional & scientific | 2022 |
| Høyda Hotelleiendom AS | | 2025 |
| Innotec Norway AS | Wholesale & retail | 2004 |
| Innotrade AS | Wholesale & retail | 2005 |
| Invero AS | | 2022 |
| J. S. Larsen AS | Construction | 2012 |
| J11 Eiendom AS | Real estate | 2020 |
| Jacob Solgaard AS | | 2022 |
| Jernbanegata 11 AS | Real estate | 2006 |
| John E Edvardsen Holding AS | | 2017 |
| Juliussens AS | Wholesale & retail | 2015 |
| Kjærre Bygg AS | Construction | 1980 |
| Kjøkkensenter Viken AS | Wholesale & retail | 2015 |
| Klo Invest AS | | 2024 |
| Kpe Group AS | Administrative & support | 2025 |
| Kristian Horgen Invest AS | Real estate | 2005 |
| KSV Snekkerservice AS | Construction | 2013 |
| Laha Invest AS | Financial services | 2008 |
| Landberg Bygg AS | Construction | 2024 |
| Lifedesign AS | Wholesale & retail | 2014 |
| Lilleeng 2 AS | Real estate | 2025 |
| Lokalveien Eiendom AS | Real estate | 2015 |
| Lra Holding AS | | 2023 |
| Lund Vestre Maskindrift AS | Construction | 2020 |
| Mads Torp Holding AS | | 2022 |
| Major Major AS | | 2020 |
| Manstad Grill AS | Hospitality | 2025 |
| Manstad Helsehus AS | Real estate | 2023 |
| Manstad Kabel-Tv SA | Information & communication | 1989 |
| Manstad Kjøtt AS | Manufacturing | 2007 |
| Manstad Legekontor AS | Health & social care | 2023 |
| Manstad Tannklinikk AS | Health & social care | 2021 |
| Mesterbygg Fredrikstad Da | Construction | 2008 |
| Missingen Services AS | Professional & scientific | 2013 |