| 100-METERSKOGEN Barnehage AS | Education | 2006 |
| A-Z Byggkompaniet AS | Construction | 2025 |
| AB Elektro AS | Construction | 2019 |
| Abrir Økonomistyring AS | Professional & scientific | 1998 |
| Aj Transport AS | Transport & logistics | 1999 |
| Align Design AS | Professional & scientific | 2023 |
| Alitek Eiendom AS | Real estate | 2015 |
| Alliance Røyken AS | Wholesale & retail | 2009 |
| Almanova AS | Real estate | 2000 |
| An Elektro AS | Construction | 2022 |
| Anleggsgartner Marius Gatevold AS | Administrative & support | 2010 |
| Anleggsgartner Richard Bryhn AS | Administrative & support | 1997 |
| Anne Rød Et Al AS | Professional & scientific | 2006 |
| Ar Elektro AS | Construction | 2019 |
| Arne Himling AS | Construction | 2012 |
| Art Taxi AS | Transport & logistics | 2024 |
| AS Meneur | Professional & scientific | 1991 |
| AS Metax | Manufacturing | 1984 |
| AS Søndre Nærsnes | Real estate | 1926 |
| Asker Byggtjenester AS | Construction | 2021 |
| Asker Lås Og Sikkerhet AS | Manufacturing | 2021 |
| Asker Og Bærum Bad Og Flis AS | Construction | 2015 |
| Asker Og Bærum Elektro AS | Construction | 2023 |
| Asker Taxisentral AS | Transport & logistics | 2023 |
| Askerhalvøya Eiendom AS | Real estate | 2010 |
| Astro Invest AS | Wholesale & retail | 2017 |
| Atina AS | Professional & scientific | 1997 |
| Auto Global AS | Wholesale & retail | 2023 |
| Auto Røyken AS | Other services | 2021 |
| Avesta Byggservise AS | Construction | 2023 |
| Aware of AS | Education | 2018 |
| Ayno Ans | Education | 2000 |
| Beb Holding AS | Real estate | 2008 |
| Bebicon AS | | 2020 |
| Belgravia AS | Mining & quarrying | 2017 |
| Best Som Meg Da | Manufacturing | 2020 |
| BHB AS | Administrative & support | 2023 |
| Bitehagen Barnehage SA | Education | 1998 |
| Bjørnstadgården AS | Professional & scientific | 2004 |
| Bobgrip AS | Information & communication | 2023 |
| Boligrehab.No AS | Real estate | 2014 |
| Borse Capital AS | Administrative & support | 2022 |
| Borse Holding AS | Administrative & support | 2022 |
| Brokke Invest AS | | 2020 |
| Bråset Legesenter Da | Health & social care | 2011 |
| Bud Medical AS | Health & social care | 2022 |
| Bunadsystua AS | Manufacturing | 2014 |
| Buøy Holding AS | | 2023 |
| Bygg Hedinsson AS | Construction | 2019 |
| Byggtech-Asker AS | Wholesale & retail | 2020 |
| Byggtech-Bti AS | Wholesale & retail | 2024 |
| C&B Pro AS | Wholesale & retail | 2025 |
| Cacea AS | Real estate | 2009 |
| Campus Marine AS | Professional & scientific | 2010 |
| Carlén Holding AS | Construction | 2019 |
| Carview Norway AS | Wholesale & retail | 2025 |
| CB Bygg AS | Construction | 2014 |
| Cbek Holding AS | Real estate | 2021 |
| Cbtools.No AS | Manufacturing | 2017 |
| Cenian AS | Financial services | 2021 |
| Ci Coaching AS | Professional & scientific | 2017 |
| Citco AS | Professional & scientific | 2020 |
| Classic Pizza AS | Hospitality | 1999 |
| D.O Holding AS | Health & social care | 2020 |
| Damasa AS | | 2024 |
| Daniels Inrednings Snickeri AS | Construction | 2017 |
| Danke AS | Real estate | 2022 |
| Dermaboost Klinkk AS | Other services | 2026 |
| Dessen Invest AS | Financial services | 2008 |
| Di-Em AS | Financial services | 2015 |
| Difference Gruppen AS | Other services | 2005 |
| DP Performance AS | Other services | 2013 |
| DR Ing Bjørn Buen AS | Professional & scientific | 1991 |
| Driftco AS | Professional & scientific | 2025 |
| Dykkerfirma Torbjørn Børstad AS | | 1990 |
| Døgnbemannede Omsorgsboliger AS | Health & social care | 2020 |
| E & E Bygg AS | Construction | 2023 |
| East West Trading Ans | Wholesale & retail | 2001 |
| Easy Jobs Norge AS | Construction | 2026 |
| Easyfact AS | Information & communication | 2012 |
| Effektiv Rengjøring AS | Administrative & support | 2018 |
| Eliesen Holding AS | Professional & scientific | 2023 |
| Elite Partner Nordic AS | Construction | 2018 |
| Engeset Invest AS | Professional & scientific | 2024 |
| Enter Equity AS | Real estate | 2021 |
| Erichsen Drift & Service AS | Administrative & support | 2023 |
| Erichsen Wealth Management AS | Financial services | 2022 |
| Ertzgaard Bygg AS | Construction | 2021 |
| Et Management AS | | 2022 |
| Everlite AS | Wholesale & retail | 2020 |
| Eycarus AS | Information & communication | 2006 |
| Farmland AS | Manufacturing | 2017 |
| Fasong AS | Other services | 2013 |
| Feelgood Øst AS | Arts & recreation | 2024 |
| Fenrir Capital Holding AS | | 2026 |
| Fjake Invest AS | Real estate | 1998 |
| Fjordabris Holding AS | | 2026 |
| Flovik Holding AS | | 2021 |
| Fordringsfabrikken AS | Real estate | 2002 |
| Fore!Front AS | Information & communication | 2025 |