| 83 Invest AS | | 2021 |
| Abc Lageret AS | Real estate | 2018 |
| Akershus Renhold & Service AS | Administrative & support | 2025 |
| Akt Trading AS | Wholesale & retail | 2010 |
| Aktiv Naprapati AS | Health & social care | 2019 |
| Art Vandelay Invest AS | | 2022 |
| AS Vittingfoss Industri Eiendom | Real estate | 2023 |
| Aunan Maskin AS | Construction | 2011 |
| Bakerigården AS | Real estate | 2000 |
| Bbgroup AS | Wholesale & retail | 2018 |
| Bergsli Og Opsahl Skogsdrift Ans | Agriculture & fishing | 1989 |
| Bjerkes Eiendomsselskap AS | Real estate | 1982 |
| Bjørkebakken Andelslag SA | Education | 2003 |
| Brubakken Home AS | Professional & scientific | 2023 |
| BST Lagertjenester AS | Real estate | 2012 |
| C-Optikk Hvittingfoss AS | Wholesale & retail | 2004 |
| Correct Eiendom AS | Real estate | 2016 |
| Dinodesign AS | Manufacturing | 2023 |
| Dørsjø Skogsveiforening SA | Real estate | 2014 |
| Ebs AS | Real estate | 1987 |
| Edeneco Ventures AS | Mining & quarrying | 2024 |
| El Boss AS | Construction | 2019 |
| Emek AS | Other services | 1998 |
| Emitra AS | Transport & logistics | 2020 |
| Englers Flis & Skifer AS | Construction | 2014 |
| Erga Bygg Og Anlegg AS | Construction | 2022 |
| Eyey AS | Information & communication | 2021 |
| Feel Free Entertainment AS | Professional & scientific | 2022 |
| Finali AS | Professional & scientific | 2023 |
| Foss Gård Ans | Agriculture & fishing | 2011 |
| FPJ Holding AS | | 2021 |
| Free Spirit Da | Other services | 2008 |
| FT Eiendom AS | Construction | 2005 |
| Furuly Spiseri AS | Hospitality | 2005 |
| Gintas Bygg AS | Construction | 2013 |
| Golfsim Hvittingfoss AS | Education | 2020 |
| Gym'N AS | Arts & recreation | 2020 |
| Heddalsveien Dagligvare AS | Wholesale & retail | 2007 |
| Historiske Spill Da | Manufacturing | 2026 |
| Historiske Telt AS | Wholesale & retail | 2014 |
| Hiva Group AS | Education | 2024 |
| Hvittingfoss Auto AS | Other services | 2018 |
| Hvittingfoss Butikksenter AS | Real estate | 2008 |
| Hvittingfoss Dagligvare AS | Wholesale & retail | 2025 |
| Hvittingfoss Eiendom Ans | Real estate | 1991 |
| Hvittingfoss Fruktlager SA | Wholesale & retail | 1951 |
| Hvittingfoss Helsehus AS | Real estate | 2013 |
| Hvittingfoss Legekontor Da | Health & social care | 2013 |
| Hvittingfoss Servicesenter AS | Wholesale & retail | 2013 |
| Hvittingfoss Tannlegesenter AS | Health & social care | 2021 |
| IN2VISION AS | Information & communication | 2018 |
| Industrimontage Øland AS | Manufacturing | 2021 |
| Iota AS | Information & communication | 2015 |
| Iversen's Malerservice AS | Construction | 2018 |
| Jarle Evju AS | Real estate | 2000 |
| JTH Holding AS | Financial services | 2018 |
| Kapi Eiendom AS | Real estate | 2023 |
| Kapi Gruppen AS | Construction | 2021 |
| Kick Treningssenter AS | Arts & recreation | 2009 |
| Komnes Maskin AS | Wholesale & retail | 2019 |
| Kongsberg Vinduspuss AS | Administrative & support | 2009 |
| Kongsgrunn Eiendom AS | Real estate | 2023 |
| La Elle Estetikk Klinikk AS | Other services | 2026 |
| La-Ha Holding AS | | 2020 |
| Lie Bygg AS | Construction | 1997 |
| Lie Og Holt Maskin AS | Construction | 2025 |
| Look AS | Wholesale & retail | 2014 |
| Louis AS | Health & social care | 2006 |
| Løver Maskinservice AS | Manufacturing | 2000 |
| MD Gulv AS | Construction | 2018 |
| Merkur Regnskap SA | Professional & scientific | 2003 |
| Monica's Hårsalong AS | Other services | 2013 |
| Mt-Utleie AS | Hospitality | 2021 |
| Nedre Vines Gård Da | Agriculture & fishing | 2020 |
| Nimy Eiendom AS | Real estate | 2012 |
| Nordre Foss Holding AS | | 2023 |
| Nårlia Invest AS | Real estate | 2021 |
| Pallemannen Østlandet AS | Transport & logistics | 2026 |
| Ree Forretningsdrift AS | Real estate | 2013 |
| Reine Adu AS | Professional & scientific | 2021 |
| Ronneberg Holding AS | | 2026 |
| Rosenborg Ruggieri Fyrverkeri AS | Manufacturing | 2015 |
| Rune Nilsen Maskin AS | Construction | 2013 |
| Rønneberg Gartneri Og Hagesenter AS | Agriculture & fishing | 1984 |
| Sandberg Trading AS | Wholesale & retail | 2005 |
| Sauetraet Bruktbil Da | Wholesale & retail | 2025 |
| Scandconsult AS | Professional & scientific | 2015 |
| Scandinano Solfilm AS | Other services | 2023 |
| Sekel AS | Other services | 2019 |
| SGW Holding AS | Financial services | 2017 |
| SH Maskindrift AS | Construction | 2022 |
| Skogen Trepleie AS | Agriculture & fishing | 2021 |
| Skolem Jordbær Da | Agriculture & fishing | 2010 |
| Smartstone AS | Wholesale & retail | 2018 |
| SPORT1 Hvittingfoss AS | Wholesale & retail | 2001 |
| Sterda Da | Administrative & support | 2006 |
| Sølvfoss Holding AS | | 2025 |
| TB Myrvold Eiendom AS | Real estate | 1997 |
| Test Run Da | Arts & recreation | 2023 |
| Therkelsen Maskin AS | Wholesale & retail | 2016 |