| 17. Maigt 8 AS | Real estate | 2021 |
| 1997HOLDING AS | | 2025 |
| 24SEVENSOCIAL AS | Information & communication | 2010 |
| 3C Technology Holding AS | | 2019 |
| 3DMAKE AS | Information & communication | 2018 |
| 8-BITS AS | Information & communication | 2015 |
| 830 Holding AS | Real estate | 2017 |
| A.Aasen Invest AS | Other services | 2020 |
| A.L.C Holding AS | | 2023 |
| A.Multitjenester Renhold AS | Administrative & support | 2023 |
| A/S Naufgården | Real estate | 1987 |
| A3 Eiendomsinvest AS | Real estate | 2019 |
| A3C Engineering and Inspection Services AS | Professional & scientific | 2023 |
| A6 Bolig AS | Real estate | 2012 |
| Aa Optikk AS | Wholesale & retail | 2020 |
| Aamodt Sveis AS | Manufacturing | 2026 |
| Aamodt-Holding AS | | 2026 |
| Aannestad Invest AS | | 2025 |
| Ad Fonte Klinikken AS | Other services | 2022 |
| Adacon AS | Professional & scientific | 1997 |
| Advokat Ole Håkon Ellingsen AS | Professional & scientific | 2012 |
| Advokatfirmaet Fusche Jenssen AS | Professional & scientific | 2020 |
| Aet - Arbeidsmiljø Og Energiteknikk AS | Wholesale & retail | 1987 |
| Agito AS | Information & communication | 2004 |
| Ah-J Holding AS | | 2026 |
| AI Agenten AS | Information & communication | 2019 |
| Aie AS | Construction | 2015 |
| Air-Product Norge AS | Wholesale & retail | 2012 |
| Akademiet VGS Kongsberg AS | Education | 2019 |
| Akari AS | Professional & scientific | 2026 |
| Akari Gruppen AS | Professional & scientific | 2015 |
| Akari HR AS | Professional & scientific | 2026 |
| Akari Invest AS | | 2025 |
| Akari Regnskap AS | Professional & scientific | 2024 |
| Akili Investments AS | | 2025 |
| Aktiebageriet Eiendom Ans | Real estate | 1998 |
| Aktivdata Da | Information & communication | 2000 |
| Aktive Opplevelser Ans | Arts & recreation | 2007 |
| Akå Eiendom AS | Real estate | 2023 |
| Aladdin Kebab House AS | Hospitality | 2023 |
| Albert & Inga AS | Wholesale & retail | 1997 |
| Alcpaa AS | | 2023 |
| Alea Iacta Est AS | Real estate | 2016 |
| Alfa Omega Bryterservice AS | Construction | 2013 |
| Alfa Røntgen AS | Health & social care | 2011 |
| Alfatakst AS | Professional & scientific | 2012 |
| Alliance Optikk AS | Wholesale & retail | 2007 |
| Alliance Optikk Optiker Hogstad AS | Wholesale & retail | 2022 |
| Allo AS | Professional & scientific | 2019 |
| Allo Dekor AS | Manufacturing | 2012 |
| Allprofile AS | Wholesale & retail | 2019 |
| Alp Bygg AS | Construction | 2017 |
| Alt I Bygg Kongsberg AS | Construction | 2012 |
| Alt I Hage AS | Administrative & support | 2023 |
| Altavem AS | Administrative & support | 2013 |
| Alti-El AS | Construction | 2022 |
| Alti-El Eiendom AS | Real estate | 2023 |
| Alti-El Holding AS | Construction | 2021 |
| Altum Autonomy AS | Professional & scientific | 2025 |
| Ama Andersen AS | Transport & logistics | 2013 |
| Amicis AS | Real estate | 2022 |
| Amicis Holding AS | Real estate | 2022 |
| Anagma Holding AS | | 2022 |
| Anamar Produkter AS | Wholesale & retail | 2015 |
| Andersen & Bjørdal Eiendom Da | Real estate | 2007 |
| Andersson Holding AS | Real estate | 2006 |
| Anette Pladsen AS | Health & social care | 2018 |
| Anleggsgartner Rune Ek AS | Administrative & support | 2017 |
| Anne-Karin Lauritsen AS | Wholesale & retail | 2002 |
| Anow AS | Information & communication | 2019 |
| Ans Husmann | Wholesale & retail | 1988 |
| Ans Sel Eiendomsselskap | Real estate | 1985 |
| Ant-Holding AS | | 2026 |
| Antipest Norge AS | Administrative & support | 2012 |
| Antonio Holding AS | Hospitality | 2022 |
| Applied Autonomy AS | Information & communication | 2017 |
| Applied Hydrogen AS | Professional & scientific | 2020 |
| Applus Norway AS | Professional & scientific | 1993 |
| Ar Plan & Landskap AS | Professional & scientific | 2015 |
| Aras Frisør AS | Other services | 2020 |
| Arctic Invest AS | Real estate | 2021 |
| Arctic Pets AS | Wholesale & retail | 2017 |
| Arctic Ramen AS | Hospitality | 2021 |
| Are Bråthen AS | Construction | 2005 |
| Argenti Invest AS | Real estate | 2020 |
| Argentum Eiendom AS | Real estate | 2006 |
| Argentum Entreprenør AS | Construction | 2002 |
| Argentum Holding AS | Construction | 2005 |
| Argentum Prosjekt AS | Real estate | 1991 |
| Argos Solutions AS | Manufacturing | 2008 |
| Arkisign AS | Information & communication | 2003 |
| Arkitek AS | Professional & scientific | 2001 |
| Armatek AS | Professional & scientific | 2024 |
| Arnold Berg AS | Wholesale & retail | 2005 |
| Arufors AS | Real estate | 2017 |
| AS Koberg | Manufacturing | 1957 |
| AS Kongsberg Tomteselskap | Real estate | 1965 |
| AS Møbelfrakt | Transport & logistics | 2013 |
| AS Storgt 10 | Wholesale & retail | 1991 |
| Asaf AS | Wholesale & retail | 2025 |