| 1593 Holding AS | Administrative & support | 2017 |
| A1 Miljøtek AS | Administrative & support | 2015 |
| Andresen Unum AS | | 2019 |
| Anton Motors AS | Other services | 2020 |
| Bruket I Svinndal AS | Hospitality | 2026 |
| Byggmester Thor-Arne Moslått AS | Construction | 2006 |
| Bøndenes Hus-Svinndal SA | Real estate | 1978 |
| Børresen AS | Transport & logistics | 2024 |
| Certiplay AS | Information & communication | 2026 |
| Eivind Skolt AS | Financial services | 2006 |
| Enoksen Transport AS | Transport & logistics | 2024 |
| Farmen Hunde- Og Kattehotell AS | Other services | 2019 |
| Finn Hunstad AS | Manufacturing | 1980 |
| Fraagodt Holding AS | Information & communication | 2015 |
| Gemco AS | Real estate | 2000 |
| Hagquist AS | Professional & scientific | 2025 |
| Hermine Bil AS | Wholesale & retail | 2023 |
| Hermine Eiendom AS | Real estate | 2023 |
| Hermine Holding AS | Wholesale & retail | 2022 |
| Håvard Pedersen AS | | 2014 |
| Inviss Holding AS | Professional & scientific | 2023 |
| Iveta Renhold AS | Administrative & support | 2024 |
| Jensemann Holding AS | Financial services | 2007 |
| Join the Choir AS | Arts & recreation | 2021 |
| Kjærnsrød Gartneri AS | Agriculture & fishing | 2006 |
| Kristin Grøtvedt AS | Manufacturing | 2023 |
| Linbus Fletteri AS | Manufacturing | 2013 |
| Markusløkka AS | Real estate | 2017 |
| Max Weiler Transport AS | Transport & logistics | 2011 |
| Molosse Antique AS | Wholesale & retail | 2020 |
| Moslått Holding AS | Real estate | 2006 |
| N.H. Takst & Byggrådgivning AS | Professional & scientific | 2022 |
| Nedre Østfold Oljesenter AS | Wholesale & retail | 1998 |
| Northline Music Company AS | Information & communication | 2007 |
| Norwegian Beauty AS | Other services | 2016 |
| Ole a. Bakken AS | Real estate | 2012 |
| PK Skaug Holding AS | | 2023 |
| Plankebyen Avl Og Oppdrett AS | Other services | 2024 |
| Robsrud Eiendom AS | Real estate | 1996 |
| Råde Frakt AS | Transport & logistics | 2022 |
| Solistera AS | Wholesale & retail | 2024 |
| Stene Multiservice AS | Other services | 2018 |
| Sterkenborg AS | Wholesale & retail | 2023 |
| Støten Holding AS | Real estate | 2002 |
| Sunne Føtter AS | Health & social care | 2019 |
| Superna AS | Information & communication | 2026 |
| Svinndal Bil & Maskin AS | Transport & logistics | 2005 |
| Svinndal Bygdeservice AS | Manufacturing | 2023 |
| Tømrerfirma Pettersen AS | Construction | 2019 |
| Ungeskolt AS | | 2020 |
| VVS Rør Svinndal AS | Construction | 2026 |
| Waxonwaxoff AS | Other services | 2016 |
| Wilnor AS | Information & communication | 2000 |
| Wowo Holding AS | Other services | 2016 |
| Østfold Kranbilservice Nuf | Wholesale & retail | 2007 |