| Agder Gruppen AS | | 2019 |
| Agder Gulvsliping AS | Construction | 2023 |
| Agder Industri-Automasjon AS | Manufacturing | 1996 |
| Agder Innovasjonsdistrikt AS | Professional & scientific | 2026 |
| Agder IT AS | Information & communication | 2017 |
| Agder Kalesje AS | Manufacturing | 2010 |
| Agder Kalesje Holding AS | Manufacturing | 2020 |
| Agder Kjøkken AS | Wholesale & retail | 2024 |
| Agder Kollektivtrafikk AS | Public administration | 2007 |
| Agder Last Og Dekk AS | Other services | 2025 |
| Agder Lines AS | Wholesale & retail | 2024 |
| Agder Lærlingesenter AS | Education | 2012 |
| Agder Maritim AS | Professional & scientific | 1990 |
| Agder Maskintransport AS | Transport & logistics | 2015 |
| Agder Massemottak AS | Construction | 2018 |
| Agder Massetransport AS | Transport & logistics | 2015 |
| Agder Miljøteknikk AS | Water & waste | 2019 |
| Agder Montasjeservice AS | Other services | 2003 |
| Agder Næringsmegling AS | Real estate | 2015 |
| Agder Næringsoppgjør AS | Real estate | 2022 |
| Agder Områdesikring AS | Construction | 2022 |
| Agder Property AS | Real estate | 2020 |
| Agder Prosjekt AS | Real estate | 2004 |
| Agder Rental AS | Administrative & support | 2016 |
| Agder Rental AS | Administrative & support | 2017 |
| Agder Research Holding AS | Education | 2017 |
| Agder Revisjon AS | Professional & scientific | 2007 |
| Agder Rør AS | Construction | 2000 |
| Agder Seed AS | Financial services | 2021 |
| Agder Smådyr Krematorium AS | Other services | 2017 |
| Agder Solskjerming AS | Wholesale & retail | 2021 |
| Agder Startup Fund I AS | | 2026 |
| Agder Taxi AS | Transport & logistics | 1992 |
| Agder Termografi AS | Professional & scientific | 2014 |
| Agder Tilhengersenter AS | Wholesale & retail | 2018 |
| Agder Turbuss AS | Transport & logistics | 2023 |
| Agder Vaktmester AS | Administrative & support | 2018 |
| Agder Ventilasjon AS | Construction | 2005 |
| Agder Økonomi Ans | Information & communication | 1990 |
| Agder Øre-Nese-Hals AS | Health & social care | 2014 |
| Agder-Tech AS | Construction | 2003 |
| Agderbyen 10 AS | Real estate | 2010 |
| Agderbyen 11 AS | Real estate | 2010 |
| Agderbyen 13 AS | Real estate | 2010 |
| Agderbyen 14 AS | Real estate | 2010 |
| Agderbyen 2 AS | Real estate | 2010 |
| Agderbyen 22 a AS | Real estate | 2019 |
| Agderbyen 22B AS | Real estate | 2023 |
| Agderbyen 24 AS | Real estate | 2010 |
| Agderbyen 25 AS | Real estate | 2010 |
| Agderbyen 27 AS | Real estate | 2010 |
| Agderbyen 28 AS | Real estate | 2010 |
| Agderbyen 31 AS | Real estate | 2010 |
| Agderbyen 32 AS | Real estate | 2010 |
| Agderbyen 33 AS | Real estate | 2010 |
| Agderbyen 4 AS | Real estate | 2010 |
| Agderbyen 6 AS | Real estate | 2010 |
| Agderbyen 7 AS | Real estate | 2010 |
| Agderbyen 9 AS | Real estate | 2010 |
| Agderbyen Eiendomsutvikling AS | Real estate | 2010 |
| Agderbyen Felt O AS | Real estate | 2010 |
| Agderbyen Khob 1 AS | Real estate | 2012 |
| Agderbyen Khob 2 AS | Real estate | 2012 |
| Agderbyen Khob 3 AS | Real estate | 2012 |
| Agderbyen Khob 4 AS | Real estate | 2012 |
| Agderbygg AS | Construction | 1992 |
| Agderbygg Eiendom AS | Real estate | 1989 |
| Agderport AS | Construction | 2021 |
| Agile Solutions AS | Information & communication | 2002 |
| Agile Solutions Mobility AS | Information & communication | 2020 |
| Agme AS | Real estate | 2020 |
| Agnetas AS | Health & social care | 2020 |
| Agon Solutions AS | Professional & scientific | 2015 |
| Agrio AS | Professional & scientific | 2023 |
| Ags Holding AS | Real estate | 2005 |
| Ah-Tech AS | Professional & scientific | 2020 |
| AH3 Eiendom AS | Real estate | 2011 |
| Ahagel AS | Information & communication | 2023 |
| Ahlbom Invest AS | | 2026 |
| Aho Aktiva AS | | 2021 |
| Ahs AS | Financial services | 2005 |
| Aht Service AS | Construction | 2025 |
| AI Dental Holding AS | | 2024 |
| AI Solutions AS | Information & communication | 2019 |
| AI Tech Invest 1 AS | Real estate | 2019 |
| Ai-Med System AS | Health & social care | 2023 |
| Aicentric AS | Information & communication | 2023 |
| Aidm AS | Professional & scientific | 2016 |
| Aih AS | Information & communication | 2015 |
| Aih Eiendom AS | Real estate | 2026 |
| Air Products AS | Manufacturing | 1978 |
| Aiveo AS | Information & communication | 2022 |
| Ajjo Holding AS | | 2025 |
| Ak Auto AS | Wholesale & retail | 2023 |
| Ak Mal AS | Construction | 2019 |
| Ak-G Invest AS | Real estate | 2014 |
| Akademiet Kristiansand AS | Education | 1998 |
| Akaro AS | Health & social care | 2021 |
| Akka Invest AS | Financial services | 2005 |
| Ako AS | Construction | 2001 |