| A-67 Motor AS | Manufacturing | 2024 |
| A.Løvdal AS | | 2023 |
| A67 Eiendom AS | Real estate | 2020 |
| A67 Invest AS | Real estate | 2018 |
| Aasbø Eiendom AS | Real estate | 2009 |
| Aasbø Holding AS | Professional & scientific | 2015 |
| Abac AS | Professional & scientific | 2017 |
| Activa Bolig AS | Real estate | 2024 |
| Activa Eiendom AS | Real estate | 2013 |
| Activa Prosjekt AS | Construction | 2016 |
| Agatek AS | Construction | 2015 |
| Agder Eiendomsforvaltning AS | Real estate | 2026 |
| Agder Takstol AS | Manufacturing | 2021 |
| Agder Trefiberisolering AS | Construction | 2025 |
| Agderterapi AS | Health & social care | 2019 |
| Ainformed AS | Information & communication | 2025 |
| Akr AS | Real estate | 2020 |
| Aktivitetshuset AS | Real estate | 2003 |
| Amtmannsvingen Bensinstasjon AS | Other services | 1991 |
| Amtmannsvingen Eiendom AS | Other services | 1993 |
| Amtmannsvingen Frisør AS | Other services | 1996 |
| Amtmannsvingen Motorsenter AS | Other services | 2000 |
| Andemat AS | Real estate | 1999 |
| Andersen Eiendom AS | Real estate | 1996 |
| Andreas Dønnestad AS | Construction | 1978 |
| Ann Maris Hud Og Velvære AS | Other services | 2018 |
| Aragea AS | Administrative & support | 2022 |
| Arco Invest AS | Financial services | 2005 |
| Are Omdal Invest AS | | 2021 |
| AS PC Verkstedet Reparasjon Og Salg | Other services | 2019 |
| AS Pulp Service | Professional & scientific | 1940 |
| AS Suldal Glimmerforekomster | | 1948 |
| AS Tebe | Financial services | 1981 |
| Aslaksen Drift Og Vedlikehold AS | Administrative & support | 2026 |
| Atl Holding AS | Manufacturing | 2010 |
| Atletix Tvedestrand AS | Arts & recreation | 2021 |
| Auto A-67 AS | Wholesale & retail | 2023 |
| Avenir Regnskap AS | Professional & scientific | 2001 |
| Baardsen & Høiland Holdingselskab AS | | 2026 |
| Bad-Konsulenten AS | Professional & scientific | 2022 |
| Baffe AS | Professional & scientific | 2023 |
| Bakgaarden Pub & Losji AS | Hospitality | 2007 |
| Beva Holding AS | Real estate | 2019 |
| Bevel Holding AS | Health & social care | 2022 |
| Bilvask.No Amtmannsvingen AS | Other services | 2022 |
| Bio-Bygg AS | Construction | 2025 |
| Bjellandsgården Ans | Agriculture & fishing | 2005 |
| BKT Holding AS | Financial services | 2005 |
| Black Betty AS | | 2024 |
| Blokc AS | Information & communication | 2022 |
| Blåbærskogen Naturbarnehage AS | Education | 2012 |
| Bodin Anlegg AS | Construction | 2018 |
| Bodin Invest AS | | 2021 |
| Bokhuset Forlag AS | Information & communication | 2020 |
| Bondensvalg AS | Manufacturing | 2015 |
| Broms Limited Nuf | Wholesale & retail | 2006 |
| Brygge Og Mur AS | Construction | 2012 |
| Brødrene Knutsen Maskin AS | Construction | 2001 |
| Brødrene Vatne AS | Construction | 2004 |
| Burbab AS | Hospitality | 2023 |
| BVS Klima Og Rør AS | Construction | 2021 |
| Bydal Bruk Holding AS | | 2025 |
| Bydal Upcycling AS | Professional & scientific | 2025 |
| Byens Vaktmester AS | Administrative & support | 2019 |
| Byggmester Seeberg AS | Construction | 2025 |
| Byggmester Tobias Irgens AS | Real estate | 2015 |
| Byggrenovering AS | Construction | 2006 |
| Bæråsenveien SA | Administrative & support | 2014 |
| Canillos AS | Hospitality | 2007 |
| Cecar Tvedestrand AS | Financial services | 2005 |
| Cedo AS | Financial services | 2018 |
| CFD Marine AS | Professional & scientific | 2008 |
| CL3 Norge AS | Manufacturing | 2022 |
| Coto AS | | 2023 |
| Creo Studio AS | Professional & scientific | 2014 |
| Dag Og Henry Eiendom AS | Wholesale & retail | 1999 |
| Dalholt Holding AS | | 2019 |
| DDD Dansestudio AS | Education | 2005 |
| Dekkis AS | Other services | 2024 |
| Designkokken AS | Professional & scientific | 2026 |
| Din Frisør Tvedestrand AS | Other services | 2020 |
| Dinglizar AS | Professional & scientific | 2021 |
| Direkte Import KBK Jakt Og Fritid AS | Wholesale & retail | 1999 |
| Dønnestadgården AS | Real estate | 2013 |
| Eb Eiendomsinvest AS | Real estate | 2017 |
| Elements AS | Manufacturing | 2025 |
| Elements IP AS | Administrative & support | 2025 |
| Elesco Tvedestrand AS | Other services | 2003 |
| Elevare Solution AS | Wholesale & retail | 2021 |
| Ellefsen Bygg AS | Construction | 2023 |
| Elta AS | Wholesale & retail | 1987 |
| Enkel Hund AS | Other services | 2025 |
| Erling Olsen AS | Construction | 1989 |
| Ertec AS | Manufacturing | 1988 |
| Espeland Eiendom Og Utvikling AS | Real estate | 2011 |
| Etu AS | Information & communication | 2021 |
| Evamed AS | Health & social care | 2016 |
| Evide AS | Professional & scientific | 2024 |
| F. Øien Holding AS | Real estate | 2025 |
| Fagelektro AS | Construction | 2000 |