| Café Ibsen AS | Hospitality | 2006 |
| Callisto AS | Real estate | 1984 |
| Callosum AS | Real estate | 1993 |
| Campus Grimstad Arena AS | Construction | 2015 |
| Campus Hotel AS | Real estate | 2023 |
| Caprice Holding AS | Real estate | 2016 |
| Care Response Norway SA | Information & communication | 2016 |
| Casa Don Bernhard AS | Real estate | 2022 |
| Casa Don Johan AS | Real estate | 2008 |
| Castor Shipping AS | Real estate | 2007 |
| Castra Invest AS | Real estate | 2016 |
| CB Gastronomi AS | Wholesale & retail | 2023 |
| CB Restaurering AS | Construction | 2015 |
| Cehili AS | Real estate | 2015 |
| Central Bageri AS | Manufacturing | 2023 |
| Cerno AS | Information & communication | 2025 |
| Cero Invest AS | Real estate | 1992 |
| Cero Invest Holding AS | Real estate | 2005 |
| Ceta Invest AS | Real estate | 2011 |
| CHR Bergs Eftf AS | Real estate | 1972 |
| CHR Repstad Sønner AS | Other services | 1982 |
| Chris Invest AS | Real estate | 1974 |
| Christine G. AS | Wholesale & retail | 2005 |
| CHT Holding AS | Real estate | 2017 |
| Ci Eiendomsservice AS | Administrative & support | 2006 |
| Cirka Invest AS | | 2019 |
| Claritas AS | Professional & scientific | 2023 |
| Clawback Aqua AS | Professional & scientific | 2020 |
| Clean Dekor AS | Wholesale & retail | 2025 |
| Cleviora AS | Information & communication | 2026 |
| Closedpen AS | Professional & scientific | 2021 |
| Coleene Concepts AS | Professional & scientific | 2026 |
| Con-Serv AS | Manufacturing | 2009 |
| Conducta AS | Professional & scientific | 2004 |
| Constructive Solution AS | Professional & scientific | 2025 |
| Consultare Technologies AS | Professional & scientific | 2023 |
| Continews AS | Professional & scientific | 2025 |
| Corefluence AS | Professional & scientific | 2025 |
| Cornelius Byggetjenester AS | Construction | 2016 |
| Crossfit Grimstad AS | Arts & recreation | 2015 |
| Crypteria AS | Information & communication | 2026 |
| Cs-Invest AS | Real estate | 2019 |
| Culvert Crawler AS | Manufacturing | 2020 |
| D K Salvesen Holding AS | Real estate | 2005 |
| Daland Industrier Da | Manufacturing | 2002 |
| Dancy Sport AS | | 2022 |
| Darak Eiendom AS | Real estate | 2015 |
| Data Consultants AS | Information & communication | 2016 |
| Davia Holding AS | Professional & scientific | 2022 |
| Davidhorn AS | Information & communication | 2002 |
| Decia AS | Information & communication | 2017 |
| Delina Aurora AS | Wholesale & retail | 2022 |
| Delli Transport AS | Transport & logistics | 2022 |
| Dentarium AS | Health & social care | 2021 |
| Dentholding AS | Real estate | 2011 |
| Devio AS | Professional & scientific | 2019 |
| DHR Invest AS | | 2020 |
| Diana Renhold AS | Administrative & support | 2025 |
| Diavola AS | | 2024 |
| Diforma AS | Professional & scientific | 2018 |
| Digital Innovation Hub Oceanopolis AS | Information & communication | 2021 |
| Dke Invest AS | Construction | 2012 |
| DO2 Design AS | Wholesale & retail | 2022 |
| Dompa AS | Real estate | 2023 |
| Don Invest AS | | 2021 |
| Drammen Boligutvikling AS | Real estate | 2022 |
| Dravat AS | Wholesale & retail | 2022 |
| Driiv AS | Construction | 2023 |
| Driiv Solutions AS | Professional & scientific | 2024 |
| Drottningborg Eiendom AS | Real estate | 2014 |
| Drottningborg Ungdomsskole AS | Education | 2014 |
| Drottningborg VGS AS | Education | 2005 |
| Dråb Holding AS | Financial services | 2018 |
| Drønn AS | | 2026 |
| Dufter.No AS | Wholesale & retail | 2012 |
| Dybdalsheia Eiendom AS | Real estate | 2015 |
| Dybesund Invest AS | Financial services | 2017 |
| Dykkerservice AS | Wholesale & retail | 2025 |
| Dynamittbukta AS | | 2024 |
| E.H Protech AS | Administrative & support | 2026 |
| Easier AS | Professional & scientific | 2026 |
| Ebit Holding AS | Financial services | 2016 |
| Eddiken Eiendom AS | Real estate | 2025 |
| Eddiken Holding AS | | 2025 |
| Edens Eiendom AS | Real estate | 2016 |
| Egde Consulting AS | Information & communication | 2016 |
| Egenes Contracts Consulting AS | Professional & scientific | 2020 |
| Egenes Invest AS | Real estate | 2004 |
| Eic AS Engineering & Industry Consultants | Administrative & support | 1992 |
| Eide Bygg AS | Construction | 1995 |
| Eide Vann & Kloakk AS | Water & waste | 2001 |
| Eieland AS | Construction | 2021 |
| Eiendomsselskapet Pharos Vei AS | Real estate | 2004 |
| Eiendomsvokter AS | Administrative & support | 2024 |
| Eik Prosjekt Agder AS | Professional & scientific | 2025 |
| Eik Prosjekt AS | | 2026 |
| Eikefjell AS | Real estate | 2015 |
| Ej Tjenester AS | Construction | 2026 |
| Ek-Transport AS | Transport & logistics | 2025 |
| Elba Invest AS | | 2024 |