| 5H Holding AS | | 2015 |
| A-Dream AS | | 2020 |
| A. Hanssen AS | | 2021 |
| A1 Bygg AS | Construction | 2026 |
| Aaserud Design AS | Professional & scientific | 2006 |
| Abi Auto AS | Real estate | 2015 |
| Acclivity AS | Professional & scientific | 2016 |
| Advokatfirmaet Skog AS | Professional & scientific | 2024 |
| Airgenic AS | Manufacturing | 2000 |
| Ak-Regnskap AS | Professional & scientific | 2005 |
| Akershus Bolig Og Sparing AS | Real estate | 2001 |
| Akvyra AS | Professional & scientific | 2024 |
| Alfa Kollega AS | Administrative & support | 2011 |
| Alignum Consulting AS | Professional & scientific | 2026 |
| Am Hauge AS | Real estate | 2014 |
| Ambost AS | Financial services | 2005 |
| Amfora Ønh AS | Health & social care | 2021 |
| Angur Invest AS | Real estate | 2019 |
| Anima Holding AS | Professional & scientific | 2025 |
| Ansur Proxima AS | Information & communication | 2005 |
| Aquamarine Vemork AS | Wholesale & retail | 2021 |
| Arealpartner AS | Real estate | 2021 |
| AS Autoforretning | Wholesale & retail | 2023 |
| AS Legu | Real estate | 2015 |
| Ascali AS | Real estate | 2005 |
| Asker Og Bærum Traktortjenester AS | Administrative & support | 1997 |
| Asklaner Holding AS | | 2025 |
| Atomic Holding AS | | 2022 |
| Atvb Holding AS | Construction | 2024 |
| Atvb Montasje AS | Construction | 2024 |
| Avl Invest AS | Financial services | 2017 |
| Axbo AS | Transport & logistics | 1984 |
| Baastad Berg Invest AS | | 2022 |
| Bagateller AS | Hospitality | 2012 |
| Balento AS | Wholesale & retail | 2024 |
| Baloo Invest AS | | 2024 |
| Beisvåg Invest AS | Financial services | 2005 |
| Benne AS | | 2019 |
| Betongforsegling AS | Construction | 1994 |
| Billen AS | Real estate | 2005 |
| Billington Process Technology AS | Professional & scientific | 1993 |
| Bjag Holding AS | | 2025 |
| Bjellen AS | Professional & scientific | 1995 |
| Bliss Capital AS | | 2025 |
| Bookme AS | Information & communication | 2022 |
| Borettsbil AS | Administrative & support | 2026 |
| British Auto Norway AS | Wholesale & retail | 2025 |
| Bugges AS | Professional & scientific | 2007 |
| Business Presentations AS | Professional & scientific | 1962 |
| Byggmester A.Meisingset AS | Construction | 2022 |
| Bårds Selskap for Aksjeinvestering Og Øvrige Aksjonæraktiviteter AS | | 2024 |
| Båstadveien 67C AS | Real estate | 2026 |
| Bærum Hudlegekontor AS | Health & social care | 2023 |
| Bærum Mur Og Flis AS | Construction | 2011 |
| Bærum Regnskap AS | Professional & scientific | 2008 |
| Bærum Vekst AS | Real estate | 1984 |
| C7 Invest AS | | 2025 |
| Calmio AS | Health & social care | 2024 |
| Calossa Aksjeselskap | Professional & scientific | 2021 |
| Carma Holding AS | | 2020 |
| Cashdollar Invest AS | | 2023 |
| Casoro AS | Professional & scientific | 2004 |
| Christiane Consulting AS | Professional & scientific | 2006 |
| Cibarius AS | Financial services | 2012 |
| Cirka AI AS | Professional & scientific | 2026 |
| Classic 9 AS | Wholesale & retail | 2011 |
| Clipper Trading AS | Real estate | 1980 |
| Curry & Capital Holding AS | | 2026 |
| DDC Safety & Design AS | Professional & scientific | 2017 |
| Dgrn AS | Information & communication | 2019 |
| Dhh-Invest AS | | 2012 |
| Dicaprio Auto AS | Wholesale & retail | 2023 |
| Dikt AS | Health & social care | 2019 |
| DLB Entreprise AS | Construction | 2012 |
| Doors Like This AS | | 2024 |
| Duo Frisør AS | Other services | 2025 |
| Duoform Designbyrå Ans | Professional & scientific | 2003 |
| E. Kirkeby Invest AS | Real estate | 2007 |
| E3 Entreprenør AS | Construction | 2018 |
| Echas Revisjon AS | Professional & scientific | 1999 |
| Eckhardt AS | Professional & scientific | 1999 |
| Edsvik Invest AS | | 2025 |
| Egelund Invest AS | Real estate | 2015 |
| Ehsas Holding AS | | 2024 |
| Elektro Sol & Varme (Esv) AS | Construction | 2024 |
| Elite Bilvask AS | Other services | 2025 |
| Ellinors Rede Bolig Og Uterom AS | Professional & scientific | 2019 |
| Embos AS | | 2022 |
| Emosjoner AS | Education | 2024 |
| Emwi Holding AS | Professional & scientific | 2005 |
| Endely AS | Professional & scientific | 2021 |
| Engelsen Golfinvest AS | Education | 2022 |
| Epvs Holding AS | | 2025 |
| Erdal-Arvnes Holding AS | | 2022 |
| Estageworks AS | Education | 2025 |
| Eventus Sandvika Ans | Professional & scientific | 2002 |
| Falckenborg AS | | 1992 |
| Fawi Holding AS | | 2005 |
| Fernholt Consulting AS | Professional & scientific | 2010 |
| Fin-Ins AS | Information & communication | 2016 |