| Byggmester Tom R. Hansen AS | Professional & scientific | 2021 |
| Byggporten AS | Professional & scientific | 2020 |
| Byggtek Alta 2 AS | Construction | 2025 |
| Byggtek Alta AS | Construction | 2020 |
| Byggtek Holding AS | | 2025 |
| Byggtotal AS | Professional & scientific | 2019 |
| Byhagen Eiendom AS | Real estate | 2011 |
| Byhagen Legesenter AS | Health & social care | 2012 |
| Bår Røkenes Invest AS | Real estate | 2005 |
| Børre Andersen Maskin AS | Construction | 2022 |
| Bøysen Kjeveortopedi AS | Health & social care | 2018 |
| C-Somme AS | Information & communication | 2025 |
| C-Somme Holding AS | Information & communication | 2025 |
| C. Mannsverk AS | Real estate | 2013 |
| C.K Kystfiske AS | Agriculture & fishing | 2022 |
| Camilla Olsen Holding AS | | 2022 |
| Canyon AS | Hospitality | 2021 |
| Canyon Jakt & Fiske AS | Wholesale & retail | 2006 |
| Casas AS | | 2021 |
| Catapult AS | Real estate | 2023 |
| Catapult Bolig AS | Real estate | 2023 |
| Catapult Start AS | Real estate | 2023 |
| Cav Holding AS | | 2026 |
| CBK Holding AS | Hospitality | 2023 |
| CC60 Bygg AS | Construction | 2026 |
| Ceh AS | | 2019 |
| Cels AS | Construction | 2022 |
| Cerebroh AS | Professional & scientific | 2026 |
| Ceri AS | Information & communication | 2022 |
| Chapman AS | Information & communication | 2026 |
| Christer Sundstrøm AS | Construction | 2014 |
| Christian Oskarsson AS | Professional & scientific | 2015 |
| Chrodin AS | | 2019 |
| Chrodin Utvikling AS | Professional & scientific | 2019 |
| City Hud AS | Other services | 2020 |
| Claus Thomassen AS | Transport & logistics | 2014 |
| Clec Production AS | Manufacturing | 2011 |
| Climago AS | Professional & scientific | 2021 |
| Cloudberry Escapes AS | Administrative & support | 2025 |
| Code Inventive Da | Information & communication | 2014 |
| Colloquium AS | Professional & scientific | 2016 |
| Columna AS | Health & social care | 2014 |
| Comfort Alta AS | Construction | 1987 |
| Containerservice AS | Transport & logistics | 2001 |
| Coop Finnmark SA | Wholesale & retail | 1999 |
| Creo Media AS | Professional & scientific | 2022 |
| Crescit AS | Real estate | 2015 |
| Crosta AS | Hospitality | 2020 |
| Crsh Holding AS | | 2022 |
| Cruise Nord-Norge Og Svalbard SA | Administrative & support | 2010 |
| CSP AS | Construction | 2014 |
| CSP Engro AS | Wholesale & retail | 2022 |
| CSP Utleie AS | Administrative & support | 2026 |
| Culex AS | Financial services | 2005 |
| Cutting Edge Frisørsalong AS | Other services | 2022 |
| D Akselsen Holding AS | | 2025 |
| D Bjørkli AS | Construction | 2025 |
| D Jakobsen Holding AS | Construction | 2017 |
| D.Hammari AS | Construction | 2024 |
| D.J Fisk AS | Agriculture & fishing | 2023 |
| D.Sivertsen Holding AS | | 2025 |
| Daniel Jakobsen Maskin AS | Construction | 2017 |
| Daniel Romsdal AS | Construction | 2016 |
| Daniel Åsheim AS | Real estate | 2013 |
| Danjo AS | Transport & logistics | 2020 |
| Dark Holding AS | Professional & scientific | 2023 |
| Davvin Norway AS | Wholesale & retail | 2020 |
| Db-Eiendom AS | Real estate | 2018 |
| Db-Holding AS | Manufacturing | 2018 |
| Dedia AS | Information & communication | 2016 |
| Dek Holding AS | | 2022 |
| Demi & Li AS | Hospitality | 2012 |
| Design & Dekor Ans | Professional & scientific | 1992 |
| Design Røsberg AS | Manufacturing | 2009 |
| Devda AS | Information & communication | 2023 |
| Develix AS | | 2025 |
| Digitur Media AS | Professional & scientific | 2025 |
| Digre Eiendom AS | Wholesale & retail | 2012 |
| Digre Holding AS | Wholesale & retail | 2012 |
| Din Stil Alta AS | Wholesale & retail | 2006 |
| Ditt Rom AS | Wholesale & retail | 2024 |
| Dittbosted AS | Real estate | 2022 |
| Dittbosted Utleie AS | Real estate | 2022 |
| Djerv Frisør AS | Other services | 2019 |
| Djervv AS | Other services | 2011 |
| DKS Eiendom Alta AS | Real estate | 2005 |
| DKS Invest Alta AS | Real estate | 2005 |
| DLJ Holding AS | | 2020 |
| Dna Holding AS | | 2005 |
| Doctor AS | Health & social care | 2026 |
| Donia Alta AS | Wholesale & retail | 2025 |
| Donia Internasjonal Matvarer AS | Wholesale & retail | 2015 |
| Dr-Utleie AS | Administrative & support | 2026 |
| Drakkar Innsikt AS | Professional & scientific | 2025 |
| Driftinor AS | Administrative & support | 2017 |
| Dygestein Holding AS | | 2025 |
| Dåvøy Invest AS | | 2021 |
| Dølør Eiendom AS | Real estate | 2018 |
| E Halvorsens Elektro AS | Construction | 1995 |
| E-Commerce AS | Wholesale & retail | 2024 |