| 3R Renhold AS | Administrative & support | 2020 |
| Adminno AS | Professional & scientific | 2024 |
| Amr Holding AS | Real estate | 2021 |
| Apotek Morenen AS | Wholesale & retail | 2008 |
| AS Transport Service Og Industri | Manufacturing | 1990 |
| Askim & Mysen Rør AS | Construction | 1998 |
| Askim Minilager AS | Real estate | 2022 |
| Biek Holding AS | Real estate | 2012 |
| Bilskadesenteret Østfold AS | Other services | 2005 |
| Bjørn Einar Lier AS | Construction | 2012 |
| BRS Eiendom Ans | Real estate | 2006 |
| Brødrene Høie Blikk AS | Construction | 2015 |
| Exo AS | Wholesale & retail | 2001 |
| Eyecatcher Lysreklame AS | Manufacturing | 2016 |
| Family Print AS | Manufacturing | 2022 |
| Febo Norge AS | Wholesale & retail | 1974 |
| Febo Wecyveien AS | Real estate | 2017 |
| Glødern AS | Manufacturing | 2023 |
| Gunnar Skallerud AS | Agriculture & fishing | 2021 |
| Hedos Bygg AS | Construction | 2026 |
| Henningsmoen AS | Transport & logistics | 2017 |
| Herstad AS | Construction | 2000 |
| Herstad Entreprenør AS | Construction | 2016 |
| Hestekur AS | Professional & scientific | 2006 |
| Hus Og Hage AS | Construction | 2024 |
| Hybridgear AS | Wholesale & retail | 2026 |
| Jarle Andre Olsson AS | Financial services | 2012 |
| K & K Vent AS | Construction | 2021 |
| Kaminski Productions AS | Information & communication | 2024 |
| Kenneth Arnesen Bilverksted AS | Other services | 2016 |
| Lana Transport AS | Transport & logistics | 2025 |
| Lars Uvaag AS | Construction | 2022 |
| Lars Uvaag AS | Construction | 2026 |
| Larsen & Larsen Ans | Water & waste | 1997 |
| Leines AS | Transport & logistics | 2023 |
| Lmu AS | | 2026 |
| Luft & Miljø AS | Construction | 2006 |
| Lysaker Transport AS | Agriculture & fishing | 2022 |
| Makksund Bemanning AS | Other services | 2018 |
| Maskinagenten AS | Wholesale & retail | 2020 |
| Mathisen Vinduspuss AS | Administrative & support | 2025 |
| Maurtvedt Gårdsegg AS | Wholesale & retail | 2024 |
| Moas Eiendom AS | Real estate | 2022 |
| Moas Holding AS | Wholesale & retail | 2022 |
| Morenen Næringspark AS | Real estate | 2024 |
| Moreneveien 1 AS | Real estate | 2002 |
| Moreneveien 12 AS | Real estate | 2004 |
| Morstongveien 60 AS | Real estate | 2020 |
| Nissabo AS | Wholesale & retail | 2024 |
| Norsk Sikringsindustri AS | Wholesale & retail | 2008 |
| NS Autopark AS | Wholesale & retail | 2023 |
| Nøklebo Invest Da | Real estate | 2003 |
| Objective Automation AS | Professional & scientific | 2010 |
| Objective Technology AS | Information & communication | 1997 |
| Ol Montering 1 AS | Construction | 2012 |
| Ol Montering Eiendom AS | Real estate | 2012 |
| Ol Montering Holding AS | Real estate | 2012 |
| Paul Wold AS | Construction | 2010 |
| Plattio AS | Wholesale & retail | 2026 |
| Ret AS | Transport & logistics | 2023 |
| Ret Eiendom AS | Real estate | 2018 |
| Ronny Enger Transport AS | Transport & logistics | 2014 |
| S H Utvikling AS | Real estate | 2020 |
| Saksofonen Frisør AS | Other services | 2016 |
| SD Bygg Og Ventilasjon AS | Construction | 2012 |
| SD Produksjon AS | Construction | 2022 |
| SH Prosjekt AS | Professional & scientific | 2012 |
| SKK Eiendom AS | Real estate | 2009 |
| Skogholt AS | Real estate | 2026 |
| Slam Og Spyleservice Indre Østfold AS | Water & waste | 2000 |
| Slitu Eiendom AS | Real estate | 2020 |
| Slitu Friskole AS | Education | 2025 |
| Slitu Karosseriverksted AS | Other services | 2005 |
| Slitu Karosseriverksted Eiendom AS | Real estate | 1968 |
| Solvang-Holding AS | | 2025 |
| Sport & Food AS | Wholesale & retail | 2025 |
| SZ Holding AS | Wholesale & retail | 2017 |
| T.K.Motorsport AS | Other services | 2019 |
| Terje Torp Invest AS | Health & social care | 2020 |
| Text Shop AS | Professional & scientific | 1992 |
| Tjernæs Handel AS | Wholesale & retail | 2026 |
| Transportpartner AS | Wholesale & retail | 2019 |
| Transportsentralen AS Indre Østfold | Transport & logistics | 1982 |
| Trøgstad Maskinhandel Ans | Wholesale & retail | 1994 |
| TTC Norge AS | Manufacturing | 1988 |
| Viken Bygg Og Asfaltering AS | Construction | 2020 |
| Wecy Santos AS | Wholesale & retail | 1983 |
| Wecyveien 5 AS | Real estate | 2023 |
| Wecyveien 7A AS | Real estate | 2023 |
| Wecyveien 7B AS | Real estate | 2023 |
| Wecyveien AS | Real estate | 2023 |
| Østfold Bilskadesenter Eiendom AS | Real estate | 2005 |
| Østfold Elbil AS | Wholesale & retail | 2022 |
| Østfold Taxitjenester AS | Transport & logistics | 1993 |
| Øtt Drift AS | Transport & logistics | 2017 |
| Øyeren Strandpark AS | Real estate | 2020 |