| 2 Hjul Invest AS | Wholesale & retail | 2021 |
| 4X4 Adventure AS | Administrative & support | 2020 |
| 910 Holdings AS | | 2024 |
| A.S.A Invest AS | Wholesale & retail | 2022 |
| Adg Maling Tapet Og Gulv AS | Construction | 2018 |
| Ae Bolig AS | Real estate | 2025 |
| Ae Prosjektledelse AS | Real estate | 2025 |
| Agera Holding AS | Construction | 2014 |
| Agera Utvikling AS | Real estate | 2022 |
| Ahjohansen AS | | 2026 |
| Aitech AS | Information & communication | 2014 |
| Ak Helse Og Velvære AS | Health & social care | 2023 |
| Akj Invest AS | Real estate | 2019 |
| Aktiv Østfold Eiendomsmegling AS | Real estate | 2023 |
| Alcom AS | Wholesale & retail | 2000 |
| Alen Eiendom AS | Real estate | 2019 |
| Alen Holding AS | Real estate | 2018 |
| Amosa- Omsorg AS | Health & social care | 2026 |
| Andreassen Råd & Vedlikehold AS | Construction | 2024 |
| Anik Holding Invest AS | Administrative & support | 2022 |
| Antoc AS | Wholesale & retail | 2011 |
| Apollo Hårsenter Torp AS | Other services | 2021 |
| Arian Bahar AS | Health & social care | 2006 |
| Arild Sverre Andersen Holding AS | Wholesale & retail | 2005 |
| AS Bjørnsonsg 2 | Real estate | 1984 |
| AS Mag | Professional & scientific | 2022 |
| Asfaltbonden AS | Real estate | 2023 |
| Auto-Globe AS | Wholesale & retail | 2026 |
| Awara Invest AS | Construction | 2025 |
| Bagron Holding AS | | 2024 |
| Bakster AS | | 2023 |
| Bemko AS | | 2020 |
| Bergland Bygg AS | Construction | 2020 |
| Berwary Consulting AS | Information & communication | 2019 |
| Besor AS | Real estate | 2021 |
| BGV Byggeservice AS | Construction | 2022 |
| Billetten AS | Information & communication | 2018 |
| Bjørn S Jørgensen AS | Real estate | 2023 |
| Blyqon AS | Wholesale & retail | 2025 |
| Blyqon Holding AS | | 2025 |
| Bokmiljø AS | Wholesale & retail | 2000 |
| Borgar Anlegg AS | Construction | 2012 |
| Borge Rør AS | Construction | 1999 |
| Bovio Consult AS | Information & communication | 2012 |
| Bra Byggpartner | Construction | 2020 |
| Brødrene Johannessen AS | Construction | 1990 |
| Brødrene Lindberg AS | Administrative & support | 2026 |
| Butikkartikler AS | Wholesale & retail | 2010 |
| Bygg Og Bolig AS | Real estate | 2020 |
| Bygg Å Bo AS | Real estate | 2021 |
| Byggmester Arild Andersen AS | Construction | 2000 |
| Byggmester Arild Andersen Eiendom AS | Wholesale & retail | 1990 |
| Byggutsalget AS | Wholesale & retail | 2018 |
| Bøckmann Innredninger & Display AS | Wholesale & retail | 2018 |
| Bør Eiendom AS | Real estate | 2006 |
| Creation Creates AS | Professional & scientific | 2016 |
| Creation Creates Concepts AS | Professional & scientific | 2022 |
| Dahls Elektro AS | Construction | 2026 |
| Damsleth Skilt & Reklame AS | Manufacturing | 1990 |
| Dayana Invest AS | | 2025 |
| Denton AS | Wholesale & retail | 2015 |
| Dronespesialisten AS | Manufacturing | 2024 |
| Drømmetelt AS | Administrative & support | 2026 |
| Easy Living AS | Wholesale & retail | 1993 |
| Econic AS | Professional & scientific | 2023 |
| Edge Theory AS | | 2026 |
| Elgordo Holding AS | Wholesale & retail | 2024 |
| Ellefsen Holding AS | Real estate | 2016 |
| Ema Glass AS | Wholesale & retail | 2005 |
| Emv Bygg AS | Construction | 2026 |
| Emv Bygg Og VVS AS | Construction | 2018 |
| Enbo Bygg Og Vedlikehold AS | Construction | 2018 |
| Enggata AS | Real estate | 2021 |
| Enitor Consulting AS | Professional & scientific | 2000 |
| Evva Auto AS | Wholesale & retail | 2023 |
| Fager Skjønnhetspleie AS | Other services | 2016 |
| Fagkonsulentene AS | Professional & scientific | 2016 |
| Fagprosjekt AS | Construction | 2015 |
| Fagprosjekt Eiendom AS | Real estate | 2021 |
| FHA5 AS | Real estate | 2006 |
| Fjell AS | Construction | 2026 |
| Flexi Fug Drift AS | Construction | 2021 |
| Font Nuf | Professional & scientific | 2016 |
| Forsell Eiendom AS | Real estate | 2021 |
| Fredrikstad Bygg AS | Real estate | 2017 |
| Fredrikstad Industrilakk AS | Manufacturing | 2021 |
| Fredrikstad Maler & Bygg AS | Construction | 2023 |
| Fredrikstad Parkettsliperi AS | Construction | 2019 |
| Fredrikstad Tannteknikk AS | Arts & recreation | 1998 |
| Frefa AS | Administrative & support | 2023 |
| Friskren AS | Administrative & support | 2025 |
| G.Tegneby AS | Wholesale & retail | 2002 |
| Geir Ræstad AS | Construction | 2008 |
| Gibson Short AS | Information & communication | 2025 |
| Gridwise AS | Professional & scientific | 2026 |
| Grill House Torp AS | Hospitality | 2024 |
| Grimm AS | Wholesale & retail | 2008 |
| Gråtass Barnehage Fagen AS | Education | 2023 |
| Gråtass Barnehage Skjærviken AS | Education | 2023 |
| Gråtass Barnehage Torp AS | Education | 2004 |