| 3-T Bygg AS | Construction | 1996 |
| A&N Auto AS | Wholesale & retail | 2025 |
| Aas Bil & MC AS | Education | 2024 |
| Adamczyk Invest AS | | 2019 |
| Admin Tech Solutions AS | Professional & scientific | 2024 |
| Adventure-Booking Norway AS | Real estate | 2015 |
| Airdrop Services AS | Professional & scientific | 2025 |
| Alfa Klima Og Elektro AS | Education | 2015 |
| Allmax AS | Administrative & support | 2021 |
| Alt Lillestrøm AS | Wholesale & retail | 2001 |
| Anlegg Og Transporttjenester AS | Construction | 2018 |
| Automasjonskontroll AS | Professional & scientific | 2022 |
| Ava Kvinnehelse AS | Health & social care | 2026 |
| B.W Bygg AS | Construction | 2024 |
| Barkenes AS | Construction | 2015 |
| Bartek Invest AS | Financial services | 2017 |
| Beconor AS | Wholesale & retail | 1990 |
| Bergskaug Fus Barnehage AS | Education | 2005 |
| Betonorte AS | Real estate | 2025 |
| Binnish Bygg Transport AS | Transport & logistics | 2025 |
| Bjerke Eiendom AS | Real estate | 1978 |
| Bjerke Og Høgda AS | Arts & recreation | 2013 |
| Boligmiljø Invest AS | Real estate | 2012 |
| Borettslags-Service AS | Administrative & support | 2023 |
| Bosse Bygg AS | Construction | 2025 |
| Bruseveien Eiendom AS | Real estate | 2006 |
| Bye & Sønn Eiendom AS | Real estate | 1997 |
| Byggia AS | Construction | 2016 |
| C.P. Sand Transport A/S | Transport & logistics | 1988 |
| Chrome Eiendom AS | Construction | 2017 |
| Cleantech AS | Wholesale & retail | 2024 |
| Clifford AS | Real estate | 1975 |
| Cyberhive AS | Information & communication | 2022 |
| Dfo AS | Health & social care | 2023 |
| Digital Group AS | Professional & scientific | 2016 |
| DLP Bygg AS | Construction | 2024 |
| Dominant Fitness AS | Arts & recreation | 2024 |
| Dream Worker AS | | 2024 |
| Driftsleder Elektro AS | Construction | 2014 |
| Driftstjenester AS | Administrative & support | 2020 |
| Eckermann Eiendom AS | Real estate | 2009 |
| Eiche AS | | 2020 |
| Ekko Nor AS | Construction | 2024 |
| Elektroentreprenør Kjell Brendjord AS | Construction | 1993 |
| Em Bakken Holding AS | Real estate | 2012 |
| Enebakk Blikkenslager Verksted AS | Construction | 2026 |
| Enebakk Byggtjeneste & Vedlikehold AS | Construction | 1999 |
| Enebakk Holding AS | Wholesale & retail | 2005 |
| Enebakk Sportsenter Ans | Arts & recreation | 1992 |
| Eobd AS | Other services | 2019 |
| European Fitness Group AS | Wholesale & retail | 2022 |
| Fast-Sports AS | Wholesale & retail | 2007 |
| Flateby Apotek AS | Wholesale & retail | 2024 |
| Flateby Auto AS | Other services | 2023 |
| Flateby Eiendom AS | Real estate | 1997 |
| Flateby Sentrumsutvikling AS | Real estate | 2013 |
| Flateby Sko Ans | Wholesale & retail | 1995 |
| Flateby Vannverk SA | Water & waste | 1952 |
| Flateby Zoo Vestli Og Johnsen Ans | Wholesale & retail | 1987 |
| Flatebysenteret AS | Real estate | 2002 |
| Flis Og Ildsted AS | Construction | 2019 |
| Fliskjempen AS | Wholesale & retail | 2021 |
| Fløtten Transport AS | Transport & logistics | 2011 |
| Folkets Pub Flateby AS | Hospitality | 2021 |
| Formuefabrikken AS | | 2025 |
| FPH AS | Real estate | 2019 |
| Fridén Eiendom AS | Real estate | 2019 |
| Fridén Holding AS | | 2024 |
| Frigus Invest AS | Professional & scientific | 2022 |
| Fritzvold Holding AS | Information & communication | 2018 |
| FSU-6-382 AS | Real estate | 2026 |
| FSU-6-383 AS | Real estate | 2026 |
| Goodeal AS | Professional & scientific | 2017 |
| Gym Partner AS | Other services | 2023 |
| Gyo Consulting AS | Professional & scientific | 2017 |
| Hauglia Barnehage SA | Education | 1996 |
| Haugnes Holding AS | Wholesale & retail | 1997 |
| Haugstein Holding AS | Real estate | 2007 |
| Havig & Ellingsen Entreprenør AS | Construction | 2012 |
| Heiaas Regnskap AS | Professional & scientific | 2005 |
| Helsten Bygg AS | Construction | 2025 |
| Hermanrud Holding AS | | 2025 |
| Hilthom Invest AS | Wholesale & retail | 2023 |
| Hussain Ahmad Medical Services AS | Health & social care | 2024 |
| Håndverkere Robinsson AS | Construction | 2014 |
| Håndverkeren Lefter AS | Construction | 2025 |
| Hår Og Barbershop AS | Other services | 2021 |
| Idawill Drift AS | Arts & recreation | 2026 |
| Idawill Holding AS | Real estate | 2021 |
| Itb Elektro AS | Construction | 2023 |
| Jordan VVS AS | Construction | 2014 |
| JR Malerfirma AS | Construction | 2020 |
| Julie Miliane Invest AS | | 2024 |
| JWL Hud Og Hår AS | Other services | 2012 |
| Kaber AS | Professional & scientific | 2008 |
| Kassapartner Konsult AS | Professional & scientific | 2022 |
| Katkas AS | Wholesale & retail | 2025 |
| Kenneth's Malerservice Nuf | Construction | 2007 |
| Keymen AS | Information & communication | 2018 |
| Khag Holding AS | | 2025 |