| 2 Sikre AS | Professional & scientific | 2005 |
| 2-HAND International Machinery and Production Equipment AS | Wholesale & retail | 2013 |
| 3B Innovation AS | Professional & scientific | 2013 |
| 60 Degrees AS | Wholesale & retail | 2025 |
| 7MANTIS AS | Information & communication | 2020 |
| A Holst Holding AS | | 2026 |
| Abagust AS | Financial services | 1997 |
| Abo Installasjon AS | Construction | 1997 |
| Accelera AS | Professional & scientific | 2001 |
| Ace Algo AS | Professional & scientific | 2025 |
| Add Value AS | Real estate | 2000 |
| Aetheris Invest AS | | 2023 |
| Ajour Nordic/Norge AS | Wholesale & retail | 2016 |
| Akira Invest AS | | 2025 |
| Allimac Invest AS | | 2023 |
| Anb AS | | 2023 |
| Ancon AS | Professional & scientific | 1996 |
| Andersson Eiendomsutvikling AS | Real estate | 2023 |
| Andresen Family Holding AS | | 2026 |
| Andresen Holding AS | Real estate | 2018 |
| Apr 400 Holding AS | | 2023 |
| Ariela Invest AS | | 2024 |
| Arne Berg Invest AS | | 2023 |
| Artegis Holding AS | | 2026 |
| AS Østre Sverresborgs Plass | Real estate | 1926 |
| Asap Rørservice AS | Construction | 2013 |
| Asker & Bærum Bygg AS | Construction | 1998 |
| Asker Og Bærum Taxi AS | Transport & logistics | 1964 |
| Asker Og Bærum Taxi SA | Transport & logistics | 1984 |
| Assistco Eier AS | | 2023 |
| Atelier Wien Ans | Manufacturing | 2001 |
| Atom AS | Professional & scientific | 2005 |
| Augmentum Invest AS | | 2021 |
| Aurora S Consulting AS | Information & communication | 2026 |
| Axus Group AS | Wholesale & retail | 2025 |
| Bald Ideas AS | Information & communication | 2020 |
| Bjelland Holding AS | Professional & scientific | 2005 |
| Bjerkseter AS | Financial services | 2017 |
| BK Byggservice AS | Construction | 2014 |
| Blommenholding AS | Financial services | 2016 |
| Blommenholm Barnehage SA | Education | 1987 |
| Blommenholm Eiendom AS | Real estate | 1986 |
| Blommenholm Holding AS | | 2024 |
| Boan Invest AS | Financial services | 2000 |
| Borgersen 06 AS | | 2021 |
| Borgersen 99 AS | | 2017 |
| Brikt Hansen Consult AS | Education | 2020 |
| Bringer AS | Professional & scientific | 2019 |
| Brukaas Bygg AS | Construction | 2021 |
| Bryggegangen 8 AS | Hospitality | 2026 |
| BS Seier Holding AS | | 2026 |
| Buffer AS | Real estate | 1994 |
| Bus Invest AS | Information & communication | 2019 |
| Bærum Håndverkersenter AS | Construction | 1988 |
| Bærum Håndverksenter Eiendom Da | Real estate | 1993 |
| Bærum Malermesterforretning AS | Construction | 2008 |
| Bærum Murmesterforretning AS | Construction | 1998 |
| Carand AS | Professional & scientific | 2024 |
| Carden AS | | 2026 |
| Celesteo Holding AS | Professional & scientific | 2023 |
| Christiania Auktionsforretning Og Nestor Holding AS | Real estate | 1990 |
| Clover Transport AS | Transport & logistics | 2024 |
| Computerservice AS | Other services | 2005 |
| Continuum Omsorg AS | Health & social care | 2014 |
| Crescendo Capital AS | Professional & scientific | 2016 |
| CRM Invest AS | | 2026 |
| D&B Construction AS | Construction | 2016 |
| Declaro AS | Information & communication | 2026 |
| Delta Electronics Ans | Manufacturing | 1985 |
| Desanders AS | Professional & scientific | 2024 |
| Design & Quality AS | Wholesale & retail | 2005 |
| Digitaliseringspartner AS | Information & communication | 2019 |
| Dine Puter AS | Manufacturing | 2017 |
| Dirgi AS | Administrative & support | 2006 |
| Dolphin Holding 2 AS | | 2024 |
| Dolphin Holding AS | Real estate | 2016 |
| Dolphin Kapitalforvaltning AS | Real estate | 1969 |
| Donum Invest AS | Real estate | 2020 |
| Drone AS | Transport & logistics | 2018 |
| E - Radiologi AS | Health & social care | 2016 |
| Ea Capital AS | Real estate | 2024 |
| Ed Vann Og Avløpslag SA | Water & waste | 2009 |
| Edvin Borgheim Holding AS | | 2019 |
| Ekornes Myhre Holding AS | | 2026 |
| Ekornhuset AS | Real estate | 1991 |
| Eksklusiv Media AS | Arts & recreation | 2022 |
| Elite Capital AS | Administrative & support | 1997 |
| Elorep Invest AS | Financial services | 2017 |
| Elvial AS | | 2021 |
| Emny Holding AS | | 2022 |
| Envision IT AS | Information & communication | 2000 |
| Erik Bil-Proff AS | Wholesale & retail | 2023 |
| Euro Nordic Consulting AS | Professional & scientific | 2023 |
| Evs AS | | 2023 |
| Exergy Management AS | Professional & scientific | 2022 |
| Explore North AS | Information & communication | 2009 |
| Eyvind Holt AS | Real estate | 1973 |
| Eyvind Holt Eiendom AS | Real estate | 1983 |
| Fabser Helse Foods AS | Manufacturing | 2023 |
| Fabser Wellness Import AS | Wholesale & retail | 2025 |