| 2380 Invest AS | | 2024 |
| 2380-HOLDING AS | | 2021 |
| 4A Invest AS | | 2022 |
| 5 Eiendom AS | Real estate | 2021 |
| A-S Holding AS | Real estate | 2021 |
| A. Beitrusten Holding AS | | 2025 |
| A. Evensen Eiendom AS | Real estate | 2005 |
| A. Jacobsen Holding AS | | 2021 |
| A.B Holding AS | | 2021 |
| A.P. Invest AS | | 2023 |
| Aann Holding AS | | 2026 |
| Aasen Fam Holding AS | | 2026 |
| Abholding AS | | 2022 |
| Absolute Eiendom AS | Real estate | 2023 |
| Absolutt Forlag AS | Information & communication | 2025 |
| Adan Frisør AS | Other services | 2025 |
| Adeo AS | Manufacturing | 2010 |
| Adt Bygg AS | Construction | 2025 |
| Advice Concept AS | Professional & scientific | 2021 |
| Advice Innlandet AS | Professional & scientific | 2012 |
| Advice Norge AS | Professional & scientific | 2021 |
| Advice Oslo AS | Professional & scientific | 2021 |
| Advice Reklamebyrå AS | Professional & scientific | 1986 |
| Advice Visuals AS | Professional & scientific | 2021 |
| Advokatfirmaet Grothe AS | Professional & scientific | 2025 |
| Airex Aviation AS | Education | 2014 |
| Airground Flow Technologies AS | Information & communication | 2025 |
| Ajer Kontorsenter AS | Education | 1992 |
| Ajohansen Holding AS | Financial services | 2017 |
| Ak-Eiendom AS | Real estate | 2005 |
| Aktiv Eiendomsmegling Ringsaker AS | Real estate | 2016 |
| Alaska Husky Turglede AS | Arts & recreation | 2021 |
| Alexandra Ans | Hospitality | 1992 |
| Alf Håkon Holding AS | | 2022 |
| Alfa Dot Eiendom AS | Real estate | 2005 |
| Alfred Høiby Holding AS | Wholesale & retail | 2015 |
| Alh Holding AS | | 2020 |
| Allemat AS | Wholesale & retail | 2026 |
| Aller Innerst AS | Wholesale & retail | 2021 |
| Altman Ans | Construction | 2000 |
| Amber Holding AS | Real estate | 2022 |
| Amber Invest AS | Real estate | 2020 |
| Amber Utvikling AS | Real estate | 2022 |
| Ammam AS | Information & communication | 2025 |
| Amundsens Bilverksted AS | Other services | 1994 |
| Andreas Amb AS | Arts & recreation | 2018 |
| Andreassen Legetjeneste AS | Health & social care | 2017 |
| Andvare AS | Administrative & support | 2021 |
| Anemone Blomster Ans | | 1989 |
| Angr Holding AS | | 2022 |
| Anleggsgartner Arnesen AS | Administrative & support | 2005 |
| Ans Dagfinruds Våpenforretning | Wholesale & retail | 1981 |
| Antec Holding AS | Administrative & support | 2024 |
| Antec Skadedyrkontroll AS | Administrative & support | 2024 |
| Ar Media AS | Professional & scientific | 2026 |
| Archo Norge AS | Wholesale & retail | 2017 |
| Arctic Summit AS | Professional & scientific | 2025 |
| Are Kulsveen Holding AS | Wholesale & retail | 2005 |
| Arkel Innlandet AS | Construction | 2005 |
| Arkel Profil AS | Professional & scientific | 2019 |
| Armi Holding AS | Administrative & support | 2024 |
| Arne Hansen Installasjon AS | Construction | 2001 |
| Arr Arkitekter AS | Professional & scientific | 2017 |
| Arrco AS | Administrative & support | 2006 |
| Art Thanh Hong AS | Arts & recreation | 2011 |
| Artibevaring AS | Professional & scientific | 2024 |
| Asbjørn Nordsveen AS | Construction | 1991 |
| Asko Hedmark AS | Wholesale & retail | 1968 |
| Asla Maskin AS | Construction | 2023 |
| Asv Bygg & Service AS | Construction | 2017 |
| Atfysio AS | Health & social care | 2016 |
| Atg Glede Spreder Holding AS | | 2026 |
| Atlantica Eiendom AS | Real estate | 2005 |
| Ats Eiendom Ans | Real estate | 2003 |
| Aurora Polaris AS | Health & social care | 2015 |
| Austdal Grunnmur Og Graveservice AS | Construction | 2015 |
| Auto-Benz AS | Other services | 2009 |
| Automasjon Og Montasje AS | Construction | 2008 |
| Axedo AS | Information & communication | 2019 |
| Aydin Holding AS | | 2025 |
| B & a Eiendom AS | Real estate | 2013 |
| B & G Group AS | Hospitality | 2026 |
| B E Invest AS | Construction | 2006 |
| B&H Regnskap Ans | Professional & scientific | 2004 |
| Bakeri Og Storkjøkkenutstyr AS | Wholesale & retail | 2007 |
| Bakeriet I Brumunddal AS | Manufacturing | 2013 |
| Bakgården Pub Ans | Hospitality | 2003 |
| Bakketungata AS | Real estate | 2004 |
| Balder Entreprenør AS | Construction | 2015 |
| Balder Investment AS | Construction | 2014 |
| Baldis Invest AS | Professional & scientific | 2023 |
| Bangkok Asia Mat Og Sushi AS | Hospitality | 2023 |
| Battericentralen AS | Wholesale & retail | 1989 |
| Bausbakken AS | | 2021 |
| BCB Bil Og Deler AS | Wholesale & retail | 1995 |
| BCB Bygg Og Eiendom AS | Wholesale & retail | 2000 |
| Beatrix Kiddo Invest AS | | 2022 |
| Bego Bygg Da | Professional & scientific | 1988 |
| Begravelsesbiler AS | Wholesale & retail | 2025 |
| Belcanto Invest AS | Real estate | 1981 |