| Kgts-Eiendom AS | Real estate | 2016 |
| Kifjord AS | Financial services | 2018 |
| Kilskar Invest AS | | 2023 |
| Klipa AS | Real estate | 2011 |
| Kmont AS | Construction | 2011 |
| Koje AS | | 2021 |
| Krøger Holding AS | | 2016 |
| Kumlokk Holding AS | Financial services | 2010 |
| Kurt Endre AS | Agriculture & fishing | 2022 |
| Kvalsund Lodge AS | Hospitality | 2022 |
| Kvaløya Lodge AS | Hospitality | 2016 |
| Kvaløya Nordre Grunneierlag SA | Real estate | 1961 |
| Kvaløya Utleie AS | Administrative & support | 2014 |
| Kvaløyvåg Landhandleri AS | Wholesale & retail | 2011 |
| Kvannlicare AS | Health & social care | 2024 |
| Kvass Holding AS | | 2022 |
| Kvasse Kniver AS | Manufacturing | 2021 |
| Laba AS | | 2026 |
| Larseng Sjøtransport AS | Transport & logistics | 1999 |
| Larseng-Håkøybotn Grunneierlag SA | Real estate | 1992 |
| Lauklines Kystferie AS | Hospitality | 2014 |
| Lavik Transport & Utleie AS | Administrative & support | 2015 |
| Littlemarbleknits AS | Professional & scientific | 2026 |
| Lock Holding AS | Construction | 2020 |
| Lofotenturist AS | Real estate | 2021 |
| Løvli Maskin Ans | Construction | 2009 |
| M. Klaudiussen Transport AS | Transport & logistics | 2019 |
| M.H. Consulting AS | Professional & scientific | 2023 |
| Magnella Holding AS | Administrative & support | 2017 |
| Magnus Seppola Holding AS | | 2023 |
| Makeni AS | Real estate | 2018 |
| Malin JP Holding AS | | 2019 |
| Marc & Stella AS | Manufacturing | 2018 |
| Mareman AS | Financial services | 2014 |
| Maribell Sjøbuer AS | Real estate | 2012 |
| Marin Motor AS | Manufacturing | 2017 |
| Marisofi Holding AS | | 2020 |
| Maskinentreprenør Tor Gabrielsen AS | Construction | 2000 |
| Max Vaktmester Service AS | Administrative & support | 2018 |
| Meaw Invest AS | | 2021 |
| Mediaskjerm Media Da | Information & communication | 2008 |
| Melia Maling & Oppussing AS | Construction | 2024 |
| Middelthon Invest AS | Real estate | 2019 |
| Mindful Yoga Tromsø AS | Education | 2020 |
| Mni Multiservice AS | Construction | 2020 |
| Moves to Freedom AS | Professional & scientific | 2026 |
| Mpe Bygg AS | Construction | 2020 |
| Multimarked AS | Other services | 2020 |
| Mwa AS | Professional & scientific | 2007 |
| Nauste Eiendomselskap AS | Real estate | 2020 |
| Nerd Nomads AS | Information & communication | 2018 |
| Next Gen Anlegg AS | Construction | 2026 |
| Nikida AS | Professional & scientific | 2024 |
| Nilson AS | Transport & logistics | 2022 |
| Nofi AS | | 2018 |
| Nofi Doptec AS | Professional & scientific | 2023 |
| Nofi Eiendom AS | Real estate | 2018 |
| Nofi Oppdrettservice AS | Agriculture & fishing | 2009 |
| Nofi Tromsø AS | Manufacturing | 2003 |
| Nofi Vakos AS | Professional & scientific | 2016 |
| Nofika AS | | 2020 |
| Nomi Brygge AS | Real estate | 2018 |
| Nord Energi Consult AS | Professional & scientific | 2014 |
| Nord Trygg AS | Professional & scientific | 2025 |
| Nordic Bilpleie AS | Other services | 2015 |
| Nordic Drift AS | Professional & scientific | 2026 |
| Nordic Pharma Inc AS | Manufacturing | 2005 |
| Nordic Resilience Team AS | Professional & scientific | 2026 |
| Nordic Safety Gear AS | Professional & scientific | 2025 |
| Nordic Spark Ventures AS | | 2024 |
| Nordplast AS | Manufacturing | 1989 |
| Nordre Kattfjord Grunneierlag SA | Real estate | 1984 |
| Nordtind AS | Real estate | 2023 |
| Nordås Dental AS | Health & social care | 2019 |
| Norse Marin AS | Transport & logistics | 2015 |
| Norsk Flåteservice AS | Wholesale & retail | 2025 |
| Norsohl AS | Real estate | 2025 |
| Northern Subsea and Diving Agency AS | Construction | 2014 |
| Norvalid AS | Information & communication | 2023 |
| Nygård Hagebruk AS | Agriculture & fishing | 2012 |
| Ohj Invest AS | | 2025 |
| Oleng AS | Professional & scientific | 2024 |
| Olsborgs Snekkerservice AS | Construction | 2017 |
| Ook Holding AS | | 2018 |
| Ordalen AS | Mining & quarrying | 2006 |
| Peppr AS | Information & communication | 2026 |
| Perfekt Prosjekt AS | Wholesale & retail | 2009 |
| Pipe & Ildsted AS | Construction | 2016 |
| Polarman AS | Professional & scientific | 1996 |
| Polkonsult AS | Professional & scientific | 1984 |
| Polstrand Eiendom AS | Real estate | 2025 |
| Polstrand Eiendom Holding AS | Real estate | 2024 |
| Praktisk Reindrift AS | Transport & logistics | 2005 |
| Prestenggata 19 AS | Real estate | 2022 |
| R&F Utleie AS | Wholesale & retail | 2009 |
| Racation AS | Wholesale & retail | 2026 |
| Rammeskjeiv Ans | Information & communication | 2019 |
| Rawiel AS | Construction | 2011 |
| Red Impact Holding AS | Professional & scientific | 2022 |
| Regnskapsrådet AS | Professional & scientific | 2021 |