| Arijo AS | Education | 2020 |
| Arild Hestås Invest AS | Real estate | 2005 |
| Arina Bilvask AS | Other services | 2009 |
| Arina Invest AS | | 2008 |
| Arkadekongen AS | Wholesale & retail | 2025 |
| Arki Stray AS | Professional & scientific | 2017 |
| Arkicon AS | Professional & scientific | 2015 |
| Arkitektur AS | Financial services | 2005 |
| Armas Holding AS | | 2026 |
| Arne & Arne Invest AS | Other services | 2022 |
| Arne Rasch Eiendom AS | Real estate | 2016 |
| Arne Rasch Invest AS | Real estate | 2016 |
| Aromashop AS | Wholesale & retail | 2023 |
| Arro Capital AS | | 2026 |
| Art Connections Ans | Administrative & support | 2006 |
| Arta Renhold Og Service AS | Administrative & support | 2025 |
| Arta Tech AS | Information & communication | 2020 |
| Artglass AS | Construction | 2014 |
| Artisjokken AS | Wholesale & retail | 2013 |
| Artistbyrået AS | Professional & scientific | 2016 |
| Artman Holding AS | | 2020 |
| Artofy AS | Wholesale & retail | 2026 |
| Artspots AS | Professional & scientific | 2015 |
| Artura AS | Professional & scientific | 2025 |
| Arvegullet Holding AS | | 2024 |
| Arvid Malm Byggfirma AS | Construction | 2024 |
| AS Agder Alle NR 21 23 Og 25 | Households | 1950 |
| AS Astra Nova | Professional & scientific | 1990 |
| AS Bjismern | Real estate | 1978 |
| AS Budex Norge | Transport & logistics | 2012 |
| AS Elektrisk Kristiansand | Real estate | 2015 |
| AS Fidalgo | Information & communication | 1964 |
| AS Gyldenløvesgt 34/40 | Real estate | 1947 |
| AS Haanes | Real estate | 1979 |
| AS Hamreheia 84 | Households | 1955 |
| AS Hannevik Terrasse | Real estate | 2018 |
| AS Haveby II | Households | 1946 |
| AS Haveby III | Households | 1947 |
| AS Haveby NR 1 | Households | 1946 |
| AS Heimdalsgatens Boligbygg Blokk B Og C | Households | 1950 |
| AS Hodne | Wholesale & retail | 1967 |
| AS Hårdmetallverktøy | Wholesale & retail | 1948 |
| AS Kiropraktor Tor Christian Birkeland | Health & social care | 2020 |
| AS Nortrade | Wholesale & retail | 1987 |
| AS Otra Maling Og Lakkfabrikk | Manufacturing | 1965 |
| AS Radio-Televisjon Herman Justvik | Real estate | 1965 |
| AS Reiersen VVS | Construction | 1980 |
| AS Tannlege Klouman | Health & social care | 2020 |
| AS Thelma | Transport & logistics | 1989 |
| Asalivator AS | Manufacturing | 2021 |
| Asbjørnsen Holding AS | Real estate | 1988 |
| Asfalt Og Betongknusing AS | Mining & quarrying | 2008 |
| Ash Eiendom AS | Wholesale & retail | 2021 |
| Ash Holding AS | Wholesale & retail | 2015 |
| Asiabutikken AS | Wholesale & retail | 2011 |
| Asiatisk Kristiansand AS | Hospitality | 2025 |
| Asitech Ans Adgangskontroll Sikrings Teknikk | Construction | 1986 |
| Ask Aviation Tech Team AS | Education | 2019 |
| Aske & Baardsen Holding AS | Wholesale & retail | 2023 |
| Aske Rørleggermester AS | Construction | 2005 |
| Askehaugen AS | Real estate | 2000 |
| Aslak Berntsen Eiendom AS | Real estate | 2024 |
| Aspelund Art AS | Arts & recreation | 2017 |
| Aspelund Eiendom AS | Arts & recreation | 2017 |
| Aspelund Holding AS | Arts & recreation | 2005 |
| Aspire Holding AS | | 2024 |
| Assess Kompetanse AS | Professional & scientific | 1997 |
| Assist Kristiansand AS | Wholesale & retail | 2003 |
| Assist Kristiansand Holding AS | | 2021 |
| Assistance Systems AS | Professional & scientific | 2019 |
| Assistert Selvhjelp AS | Information & communication | 2012 |
| Assure AS | Professional & scientific | 2005 |
| Astma Og Allergisenteret AS | Health & social care | 2008 |
| Astra Nova Invest AS | Real estate | 2016 |
| Astrait Invest AS | | 2025 |
| Astrum Agency AS | Professional & scientific | 2022 |
| Asvi AS | Real estate | 2017 |
| At Consulting AS | Professional & scientific | 2009 |
| Atami AS | Information & communication | 2012 |
| Atco Eiendom AS | Real estate | 2001 |
| Atekton AS | Information & communication | 2022 |
| Atelier Laura Vallenes AS | Arts & recreation | 2025 |
| Atelier Ribe AS | Wholesale & retail | 2015 |
| Atelier Ribe Eiendom AS | Wholesale & retail | 2023 |
| Atelier T. Olsen AS | Professional & scientific | 2008 |
| Atelko AS | Education | 2001 |
| Ati Service AS | Construction | 2021 |
| Atkinson Holding AS | | 2026 |
| Atlanter AS | Real estate | 2013 |
| Atlanter Holding AS | Real estate | 2019 |
| Atlas Holdco AS | | 2024 |
| Atle Fiskebekk Invest AS | Real estate | 2011 |
| Atle Mykjåland Invest AS | | 2020 |
| ATO2012 Eiendom AS | Professional & scientific | 2012 |
| Atom Wine Agency AS | Arts & recreation | 2017 |
| Atorp Holding AS | Health & social care | 2022 |
| Atrium Norge AS | Wholesale & retail | 2017 |
| Atrium Sør Eiendom AS | Real estate | 2017 |
| Atrium Sør Holding AS | Wholesale & retail | 2017 |
| Att Marketing AS | Administrative & support | 2021 |