| 121 Realfag AS | Education | 2018 |
| 1353 Eiendom AS | Real estate | 2025 |
| 1353 Holding AS | | 2022 |
| 1353 Invest AS | Financial services | 2023 |
| A1 Økonomi AS | Professional & scientific | 2012 |
| Aanstad Holding AS | Professional & scientific | 2022 |
| Adpoint AS | Professional & scientific | 2019 |
| Adpoint Solutions AS | Professional & scientific | 2025 |
| African Colours Ans | Wholesale & retail | 1990 |
| Agency Academy AS | Education | 2021 |
| Aje Craftsman AS | Professional & scientific | 2024 |
| Aje Holding AS | Professional & scientific | 2024 |
| Ajour Eiendomsdrift AS | Real estate | 2002 |
| Akobe AS | Administrative & support | 2006 |
| Alknes Holding AS | | 2021 |
| Alt Rent AS | Administrative & support | 2016 |
| AS Luctor | | 2023 |
| Asker Og Bærum Eldreomsorg AS | Health & social care | 2026 |
| Asker Og Bærum Energi AS | Construction | 1992 |
| Asker Og Bærum Hundelufting AS | Other services | 2012 |
| Audr AS | | 2025 |
| Avee AS | Information & communication | 2014 |
| Awgi Star International Moving & Storage AS | Transport & logistics | 2016 |
| B Safe AS | | 2016 |
| B&B Holding AS | Professional & scientific | 2005 |
| Backyard-Antiques AS | Wholesale & retail | 2019 |
| Bedre Bunnlinje AS | Professional & scientific | 2019 |
| Bergs AS | | 2023 |
| Beta Maskin AS | Wholesale & retail | 1998 |
| BHM Consulting AS | Professional & scientific | 2012 |
| Bie Produksjon AS | Information & communication | 2010 |
| Billie Invest AS | | 2021 |
| Birchgrove Invest AS | | 2021 |
| Blom Design & Architecture AS | Professional & scientific | 2023 |
| Blue Ocean Trading AS | | 2020 |
| Blåberget Invest AS | | 2025 |
| Blødekjær 9 AS | Real estate | 2018 |
| Bobolai AS | Professional & scientific | 2013 |
| Bram Invest AS | | 2020 |
| Bram Økonomisk Rådgivning AS | Professional & scientific | 1993 |
| Brinck-Mortensen Invest AS | Wholesale & retail | 2021 |
| Bsund AS | Professional & scientific | 2018 |
| BSX Holding AS | | 2023 |
| Busken Invest AS | Financial services | 2015 |
| Buss & Taxi Drift AS | Transport & logistics | 1994 |
| Bærum Bygg AS | Construction | 1986 |
| Bærum Eiendomsdrift AS | Administrative & support | 2023 |
| Bærum El Tek AS | Construction | 1991 |
| Bærum Tak Og Membran AS | Construction | 2012 |
| Bærum Transport 786 Da | Transport & logistics | 2011 |
| Bærums Verk AS | Real estate | 1982 |
| Bærums Verk Drift AS | Real estate | 1997 |
| Bærums Verk Holding AS | Construction | 2009 |
| Bærums Verk Legesenter Da | Health & social care | 2019 |
| Bærums Verk Tannlegesenter AS | Health & social care | 2023 |
| Bønsnesveien Eiendom AS | Real estate | 2020 |
| C-Media AS | Information & communication | 2005 |
| Cevada AS | Construction | 2025 |
| Chanty AS | Professional & scientific | 2014 |
| Cmas Holding AS | Construction | 2025 |
| Concept Audio Da | Administrative & support | 2002 |
| Concrest Energy AS | Professional & scientific | 2022 |
| Contrast AS | Professional & scientific | 2008 |
| Corde Consulting AS | Professional & scientific | 2011 |
| DBS Invest Holding AS | Real estate | 2018 |
| Deformat AS | Professional & scientific | 2015 |
| Dehli Investeringer AS | | 2022 |
| Det Lille Værksted AS | Wholesale & retail | 2003 |
| Dignæs & Hansen Da | Wholesale & retail | 2000 |
| Disi Holding AS | | 2025 |
| Dorak Limited Nuf | Transport & logistics | 2008 |
| Doughty AS | Information & communication | 2005 |
| Dry Carbon Catch AS | Professional & scientific | 2010 |
| E&C Språkkurs AS | Education | 2024 |
| E. Gjeraker Aktivitets Skreddar AS | Professional & scientific | 2022 |
| Eb Field Support AS | Information & communication | 2026 |
| Ecotech International Norway AS | Construction | 2007 |
| Eekern AS | | 2024 |
| Einbrat AS | Professional & scientific | 2024 |
| Einbrat Invest AS | Professional & scientific | 2024 |
| Ekom Service AS | Construction | 2018 |
| El Wett AS | Construction | 2004 |
| Eline Og Silje Da | Wholesale & retail | 2010 |
| Elstranda AS | Construction | 2024 |
| Energetica AS | Professional & scientific | 2014 |
| Enjoy the Effort AS | Education | 2023 |
| Ers 368 Holding AS | | 2023 |
| Estupendo Kommunikasjon AS | Arts & recreation | 2016 |
| Et Hjem AS | Wholesale & retail | 2016 |
| Event AS | Professional & scientific | 2010 |
| Fagereng Holding AS | Financial services | 2017 |
| Faglærer I Helse Og Omsorgsfag AS | Education | 2023 |
| Fanitullen AS | | 2018 |
| Fayad Transport AS | Transport & logistics | 2022 |
| Fearless Diva AS | Wholesale & retail | 2023 |
| Fenotype AS | Professional & scientific | 2000 |
| Feriehus AS | Hospitality | 2012 |
| Finikk AS | Information & communication | 2019 |
| Fitness Robotics AS | Professional & scientific | 2016 |
| Five AS | Financial services | 1998 |