| 4THUNES AS | Financial services | 2013 |
| Aanonsen Maritime Bygg AS | Construction | 2024 |
| Abp AS | Real estate | 2021 |
| Abp Eiendom Holding AS | | 2021 |
| Abp Elektro AS | Construction | 2012 |
| Abp Elektro Holding AS | Construction | 2012 |
| Agder Boligutleie AS | Real estate | 2018 |
| Agder Digitaldesign Da | Manufacturing | 2004 |
| Agder Maritime Service AS | Manufacturing | 2024 |
| Aktiv Nh-Eiendom AS | Real estate | 2001 |
| Allblue Offshore Loading AS | Transport & logistics | 2026 |
| Alpha Energy AS | Manufacturing | 2015 |
| Alt I Anlegg AS | Construction | 2020 |
| Alveberget AS | Real estate | 2011 |
| Anette Gjerrestad AS | Transport & logistics | 2023 |
| Ap Prosjekt AS | Professional & scientific | 2025 |
| Arcticsoftware.No AS | Information & communication | 2019 |
| Arendal Anlegg Drift AS | Mining & quarrying | 2017 |
| Arendal Anlegg Fjellsikring AS | Construction | 2001 |
| Arendal Boats AS | Manufacturing | 2025 |
| Arendal Catering AS | Hospitality | 2014 |
| Arendal Hotell & Restaurant Holding AS | | 2018 |
| Arnes Holding AS | Manufacturing | 2022 |
| Aust-Agder Eiendom AS | Real estate | 2005 |
| Aviar AS | Professional & scientific | 2005 |
| Barnekiropraktoren AS | Health & social care | 2023 |
| Baskjæråsen AS | Real estate | 2021 |
| BBT AS | Real estate | 2022 |
| Belland Drift AS | Construction | 2012 |
| Blmf Holding AS | Professional & scientific | 2007 |
| Bluefin Holding AS | | 2025 |
| Blåsen Kunsthavn AS | Arts & recreation | 2016 |
| Boligfoto Sør AS | Professional & scientific | 2025 |
| Botne Va Drift SA | Water & waste | 2024 |
| Botne Va Utbygging SA | Water & waste | 2023 |
| Brattopsa Invest AS | | 2018 |
| Breidablikk Vertshus Ans | | 1991 |
| Brekkestrand Hyttelag Drift SA | Water & waste | 2019 |
| Bsas Invest AS | | 2022 |
| Bukti Holding AS | Real estate | 2011 |
| Byggmester Gjøtterud AS | Construction | 2026 |
| Byggmester Knapskog AS | Construction | 2026 |
| Båtmannen Arendal AS | Manufacturing | 2024 |
| C Knudsen Holding AS | | 2024 |
| Casa Piemonte AS | Real estate | 2021 |
| CB Studio AS | Arts & recreation | 2024 |
| Claims Survey AS | Professional & scientific | 2011 |
| D20 Invest AS | Financial services | 2021 |
| Daisy Holding AS | Wholesale & retail | 2008 |
| Dampskibsaktieselskabet Ora | Real estate | 1918 |
| DLM Holding AS | Financial services | 2017 |
| DP Consulting AS | | 2020 |
| DR. Gunhild AS | Education | 2022 |
| Dreier Drift AS | Administrative & support | 2024 |
| Dønvik AS | Financial services | 2006 |
| Eikaas Kran Og Transport AS | Transport & logistics | 2011 |
| Eldrekraft AS | Other services | 2026 |
| Elvheim AS | Real estate | 1996 |
| Endresen Marine Consulting AS | Professional & scientific | 2025 |
| Enokk AS | | 2026 |
| Ernst & Co Invest AS | | 2021 |
| Etl Invest AS | Real estate | 2013 |
| Evn AS | Professional & scientific | 2016 |
| Evne AS | Wholesale & retail | 2013 |
| Fabelaktig AS | Professional & scientific | 2024 |
| Favør Eiendom AS | Real estate | 2015 |
| Favør Entreprenør AS | Construction | 1994 |
| Fensli Consulting AS | Professional & scientific | 2017 |
| Fjeldly Holding AS | Real estate | 2021 |
| Fjernvarmepartner AS | | 2026 |
| Fotklinikken Arendal AS | Other services | 2014 |
| Friergangen 4 Hotell Eiendom AS | Real estate | 2018 |
| Friis Consult AS | Professional & scientific | 2018 |
| Frolandssenteret 5 AS | Real estate | 2020 |
| Frydenberg Invest AS | | 2024 |
| Furuhaug 382 AS | Professional & scientific | 2022 |
| Geirtur Holding AS | | 2026 |
| Gjenbruk Og Bærekraft AS | Health & social care | 2020 |
| Golding Invest AS | | 2023 |
| Harald Mortensen AS | Financial services | 2015 |
| Haugenes Bygg AS | Construction | 2024 |
| HBG Holding AS | Health & social care | 2026 |
| Heim Holding AS | | 2025 |
| Helhetlig Helse Arendal AS | Health & social care | 2024 |
| Hjertevarme Og Egenpleie AS | Other services | 2025 |
| Hove Drifts- Og Utviklingsselskap AS | Hospitality | 2002 |
| Hove Leirskole AS | Education | 2018 |
| J&G Eiendomsinvest AS | | 2025 |
| Janejan Da | Administrative & support | 1990 |
| Jaro Kapital AS | Real estate | 2015 |
| Jarokon Invest AS | Real estate | 2017 |
| JF Snekkerservice AS | Construction | 2014 |
| Johannessen Drift & Invest AS | Wholesale & retail | 2024 |
| John Digital Invest AS | | 2025 |
| Jonsvoll Invest AS | | 2019 |
| Joyful Invest AS | | 2026 |
| Joyful Wines AS | Wholesale & retail | 2025 |
| JSL Eiendom 1 AS | Real estate | 2026 |
| JSL Group AS | | 2026 |
| Kav Holding AS | Construction | 2018 |