| Contracktr AS | Information & communication | 2021 |
| Craftel AS | Construction | 2025 |
| Crispy Food Narvik AS | Hospitality | 2016 |
| Crossfit Narvik AS | Arts & recreation | 2022 |
| Cut X Ans | Other services | 1996 |
| CVL Invest AS | | 2024 |
| D Capital AS | | 2025 |
| D Mathisen Entreprenør AS | Construction | 2003 |
| Dag-Arne Granberg Holding AS | Professional & scientific | 2014 |
| Dalan Holding AS | | 2019 |
| David AS | | 2007 |
| Day Out Narvik AS | Administrative & support | 2023 |
| DB Byggservice AS | Administrative & support | 2026 |
| Debt Invest AS | | 2020 |
| Deepquant AS | Information & communication | 2024 |
| Delikatessen AS | Hospitality | 2024 |
| Delikatessen Mat. AS | Hospitality | 2009 |
| Den Sorte Dør NR.7 AS | | 2019 |
| Dena Eiendom AS | Real estate | 2021 |
| Dental I Nor AS | Manufacturing | 2002 |
| Dentalcompagniet Eiendom AS | Arts & recreation | 1997 |
| Designplan.No AS | Manufacturing | 2019 |
| Deterministic Intelligence AS | Information & communication | 2026 |
| Detex AS | Construction | 2021 |
| DGT 51 AS | Real estate | 2025 |
| Dialog Nord AS | Professional & scientific | 2010 |
| Dib AS | Construction | 2020 |
| Die Schnapskapelle Ans | Arts & recreation | 1995 |
| Dime AS | Professional & scientific | 2018 |
| Din Anbudshjelp AS | Professional & scientific | 2014 |
| Din Portmontør AS | Construction | 2020 |
| Din Rørlegger Narvik AS | Construction | 2019 |
| Djupvik Eiendommer AS | Real estate | 2018 |
| Djupvik Terrasse AS | Real estate | 2020 |
| Djupvikveien 4 AS | Real estate | 2025 |
| Domuskvartalet AS | Real estate | 2002 |
| Dover Europe Sarl | Wholesale & retail | 2014 |
| DR. Apelqvist Ekhorn AS | Health & social care | 2024 |
| Dramaq AS | Health & social care | 2024 |
| Dronningen Dagspa AS | Other services | 2010 |
| Dronningens Gate 27 Narvik AS | Real estate | 2021 |
| Dronningens Gate 61 Narvik AS | Real estate | 2020 |
| Dronningensgate 45 AS | Real estate | 2006 |
| Dronningensgate 46 Narvik AS | Real estate | 2015 |
| Dronningensgt 47 AS | Real estate | 2000 |
| Dybwad Gruppen AS | Real estate | 1996 |
| Dynotune AS | Wholesale & retail | 2019 |
| E.A.T. Eiendom AS | Real estate | 2019 |
| E10 Eiendom AS | Hospitality | 2025 |
| Edith Oline AS | Hospitality | 2025 |
| Edvardsen Trafikkskole Narvik AS | Education | 2013 |
| Effecct Bygg AS | Construction | 2005 |
| Effecct Eiendom AS | Real estate | 2006 |
| Ega Bygg AS | Construction | 2014 |
| Eidr Invest AS | | 2023 |
| Eidstø AS | Construction | 2021 |
| Eiendomsselskapet Bonitas AS | Real estate | 1995 |
| Eiksand Holding AS | | 2026 |
| Eitzen II AS | | 2024 |
| Eivind Lilje AS | Financial services | 2014 |
| Ekhorn Cfo AS | Professional & scientific | 2021 |
| Ekornstien Barnehage AS | Education | 2022 |
| Elektro Ofoten AS | Construction | 2021 |
| Elisir AS | Professional & scientific | 2006 |
| Elkjøp Stormarked Narvik AS | Wholesale & retail | 1990 |
| Ellis Eiendom AS | Real estate | 2022 |
| Elu Consult AS | Professional & scientific | 2014 |
| EMG4X4 Nuf | Professional & scientific | 2018 |
| Emptum AS | Professional & scientific | 2014 |
| Emvil AS | Information & communication | 2016 |
| En Helt Rå by AS | Administrative & support | 2025 |
| En Himmelsk Plass AS | Health & social care | 2015 |
| Enerconsult AS | Professional & scientific | 2007 |
| Enevoldsen Anleggsservice AS | Construction | 2021 |
| Enevoldsen Eiendom AS | Real estate | 2012 |
| Enevoldsen Holding AS | Wholesale & retail | 2011 |
| Entreprenad Olof Koivuniemi Handelsbolag | Construction | 1996 |
| Envikraft | Professional & scientific | 2005 |
| Espgam Holding AS | | 2025 |
| EU Bemanning AS | Administrative & support | 2015 |
| Eureka Innovasjon AS | Professional & scientific | 2003 |
| Evenes Boligutvikling AS | Real estate | 2016 |
| Eventually Aps | Administrative & support | 2012 |
| Exergy Dryers Private Ltd | Construction | 2009 |
| Faceo FM UK Limited | Construction | 2013 |
| Facere AS | Real estate | 2015 |
| Fagerjord Vannverk SA | Water & waste | 1956 |
| Fagernes Boligbygg AS | Administrative & support | 2010 |
| Fagernes Handelssted AS | Wholesale & retail | 1998 |
| Fagernesfjellet Parkering AS | Transport & logistics | 2018 |
| Fagernessletta 8 AS | Real estate | 1994 |
| Fagernesveien 1 AS | Real estate | 2012 |
| Fagernesveien 132 AS | Real estate | 2016 |
| Fagernesveien 134 AS | Real estate | 2016 |
| Fagernesveien 140 AS | Real estate | 2021 |
| Fagernesveien 4 AS | Real estate | 1999 |
| Fagerthun Trafikkskole AS | Education | 2004 |
| Fairfox Factory AS | Manufacturing | 2012 |
| Fame Hårdesign Frisør AS | Other services | 2012 |
| Fast Takst AS | Professional & scientific | 2023 |