| Aequitas AS | Administrative & support | 2025 |
| Aess AS | Professional & scientific | 2013 |
| Aesthetic Dispatch AS | Professional & scientific | 2024 |
| Aev Holding AS | Real estate | 2017 |
| Af-Kompetanse AS | Professional & scientific | 2015 |
| AF2019 Alpha AS | Financial services | 2019 |
| Afa Holding AS | Real estate | 2005 |
| Afalch Invest AS | | 2019 |
| Afe Holding AS | Real estate | 2019 |
| Affero Graviter AS | | 2021 |
| Africana Da | Hospitality | 2012 |
| Agaas AS | Information & communication | 2026 |
| Agai AS | Administrative & support | 2025 |
| Agasøster Holding AS | | 2022 |
| Agathon Datamagi Da | Information & communication | 2003 |
| Agenturer AS | Professional & scientific | 2013 |
| Agi Holding AS | Real estate | 2005 |
| Agicom Da | Information & communication | 2001 |
| Agnes Vevle Tvinnereim AS | | 2020 |
| Agon Helse AS | Health & social care | 2023 |
| Agora AS | Hospitality | 1998 |
| Aguila Invest AS | Mining & quarrying | 2014 |
| Ah Agenturer AS | Wholesale & retail | 2014 |
| Aha 21 AS | | 2024 |
| AI Innovation Center AS | Professional & scientific | 2015 |
| AI Marine Risk AS | Professional & scientific | 2024 |
| Aicon AS | Information & communication | 2001 |
| Aidme Holding AS | Professional & scientific | 2025 |
| Aika AS | | 2013 |
| Aikido Technologies AS | Energy | 2025 |
| Aileron AS | Information & communication | 2012 |
| Aipify Group AS | Information & communication | 2026 |
| Aiseek AS | Information & communication | 2025 |
| Aivia Holding AS | | 2026 |
| Aiway AS | Information & communication | 2021 |
| Aje Invest AS | | 2005 |
| Ajjo Invest AS | Real estate | 2016 |
| Ak Bertelsen AS | Health & social care | 2015 |
| Akademiet VGS Bergen AS | Education | 2004 |
| Akademika AS | Wholesale & retail | 1986 |
| Akasia Capital AS | Information & communication | 2022 |
| Akea AS | | 2018 |
| Akerselva Atrium Ans | Real estate | 2001 |
| Akerselva Atrium AS | Real estate | 2005 |
| Akeso AS | Health & social care | 2013 |
| Akgeyik Holding AS | Wholesale & retail | 2023 |
| Akoffsuit Holding AS | | 2018 |
| Akonsult Bygg AS | Real estate | 2021 |
| Akonsult Holding AS | Real estate | 2021 |
| Akos Invest Ans | Agriculture & fishing | 2004 |
| Aksdal Marked AS | Wholesale & retail | 2009 |
| Aksell Gruppen AS | Manufacturing | 2012 |
| Aksjerederiet Atlantic AS | Transport & logistics | 1913 |
| Aksum Eiendomsinvest AS | Real estate | 2016 |
| Akt Kompetansetjeneste for Rus- Og Psykisk Helse AS | Education | 2019 |
| Aktiv Bergen Holding AS | Real estate | 2020 |
| Aktiv Bergen Sentrum AS | Real estate | 2008 |
| Aktiv Datapartner AS | Information & communication | 1998 |
| Aktiv Elite Eiendomsmegling AS | Real estate | 2007 |
| Aktiv Omsorg Vest AS | Administrative & support | 2017 |
| Aktiv Oppgjør AS | Administrative & support | 2004 |
| Aktiv Prosjektmegling Vestland AS | Real estate | 2007 |
| Aktiva Eiendomsinvestering AS | Real estate | 2010 |
| Aktuell Media AS | Professional & scientific | 2026 |
| Aktuell Økonomi AS | Professional & scientific | 2014 |
| Akufo AS | Arts & recreation | 2024 |
| Akupunktur Alliansen AS | Health & social care | 2015 |
| Akvahjelp AS | Professional & scientific | 2024 |
| Akval Invest AS | Health & social care | 2023 |
| Akw AS | Professional & scientific | 2024 |
| Akå Bil AS | Wholesale & retail | 1997 |
| Al Habib Holding AS | Real estate | 2015 |
| Alba Records Da | Arts & recreation | 1994 |
| Albatrossen AS | Health & social care | 2020 |
| Albeslag AS | Construction | 2022 |
| Albeslag Eiendom AS | Real estate | 2022 |
| Albeslag Holding AS | Construction | 2022 |
| Albumprinter Norway AS | Manufacturing | 2014 |
| Alce Distribusjon AS | Professional & scientific | 2023 |
| Aldea AS | Real estate | 2017 |
| Aldeles AS | Information & communication | 2005 |
| Alden Cancer Therapy AS | Professional & scientific | 2013 |
| Aleksander Hindenes Consulting AS | Information & communication | 2016 |
| Alenfit AS | Professional & scientific | 2014 |
| Alesko AS | Professional & scientific | 2024 |
| Alett Regnskapshjelp AS | Professional & scientific | 2012 |
| Alex Birger Grieg AS | Wholesale & retail | 1916 |
| Alexander G Vedeler AS | Financial services | 2017 |
| Alf Gundersen AS | Professional & scientific | 1987 |
| Alfa Bergen AS | Real estate | 2006 |
| Alfamed AS | Health & social care | 2024 |
| Alfapotet AS | Information & communication | 2025 |
| Ali Baba International Da | Hospitality | 1989 |
| Alien Invest AS | | 2023 |
| Alk Holding AS | | 2023 |
| Allasso.No Ans | Health & social care | 2003 |
| Allegaten Eiendom AS | Real estate | 2015 |
| Allehelgens Gate 4 AS | Real estate | 2000 |
| Allehelgensgate 2 Business Centre AS | Real estate | 2018 |
| Aller Aqua Norway AS | Wholesale & retail | 2009 |