| Infra Anlegg AS | Construction | 2006 |
| Infra Nord AS | | 2025 |
| Ingeniør Christian Utheim AS | Professional & scientific | 2022 |
| Innkjøpsservice Advokatfirma AS | Professional & scientific | 2008 |
| Intersport Fauske AS | Wholesale & retail | 2023 |
| Investermo AS | | 2026 |
| Ise Entreprenør AS | Energy | 2014 |
| Ise Fiber AS | Information & communication | 2024 |
| Ise Kvarv Kraft AS | Energy | 2024 |
| Ise Produksjon Røyrvatn AS | Energy | 2014 |
| Ise Utvikling AS | Professional & scientific | 2015 |
| Isobygg Fauske AS | Construction | 2025 |
| Ivar Hansen Transport AS | Transport & logistics | 2002 |
| J Marken Eiendom AS | Real estate | 2021 |
| J Skår Holding AS | Real estate | 2007 |
| J.O.A Holding AS | | 2021 |
| Jens Jenssen & Sønn AS | Real estate | 2024 |
| JN Bedriftsrådgivning AS | Professional & scientific | 2021 |
| Jon Olav Gjerskvål AS | Professional & scientific | 1990 |
| JTW Holding AS | | 2022 |
| JTW Invest AS | | 2022 |
| Justis Inkasso AS | Administrative & support | 1972 |
| K Skår Holding AS | Real estate | 2007 |
| K.A Parts AS | Wholesale & retail | 2024 |
| Kaffe & Calma Da | Wholesale & retail | 2025 |
| Kennet Windstad Holding AS | Transport & logistics | 2022 |
| Kipb Holding AS | | 2024 |
| Kjærran Holding AS | Construction | 2014 |
| KKR AS | Real estate | 2020 |
| Klinikk Renate AS | Other services | 2021 |
| Klungset Leir AS | Arts & recreation | 2012 |
| KM Invest AS | Transport & logistics | 2006 |
| Knit by Ruth AS | Professional & scientific | 2025 |
| Koloritt Marmorbrudd AS | Mining & quarrying | 1994 |
| Koloritt Marmorbrudd Braseth & Sønn | Mining & quarrying | 1981 |
| Krokdalsmyra Eiendom AS | Real estate | 2018 |
| Krutåga Kraft AS | Energy | 2008 |
| Krølle Frisør AS | Other services | 1990 |
| Kvitblik Vannverk SA | Water & waste | 1950 |
| Kvitblikveien 2 AS | Real estate | 2021 |
| Kvitre Barnehage AS | Education | 2022 |
| Lagerveien 1 AS | Real estate | 2026 |
| Laksåga Kraftverk AS | Energy | 2024 |
| Lars Morten Og Torgeir Rødaas Ans | Agriculture & fishing | 1992 |
| Larsen-Skaret Eiendom AS | Real estate | 2011 |
| Larssen Maskin AS | Construction | 2004 |
| Lauransen Holding AS | Construction | 2012 |
| Lcamp AS | Hospitality | 2007 |
| Ledav 607 Holding AS | | 2023 |
| Leivset Grunneierlag SA | Agriculture & fishing | 1999 |
| Lise Dahlberg AS | Financial services | 2016 |
| LMG Holding AS | | 2022 |
| Lodbrok Eiendom AS | Real estate | 2021 |
| Lu Company Økonomi AS | Professional & scientific | 2019 |
| Lyngheia Barnehage AS | Education | 1991 |
| Løvgavlveien 16 AS | Real estate | 2019 |
| Marbakken Invest AS | | 2022 |
| Marianne Invest AS | | 2023 |
| Marken Eiendom Bodø AS | Real estate | 2021 |
| Marsteen AS | | 2023 |
| Marsteen Eiendom AS | Hospitality | 2026 |
| Martin Monsen AS | Wholesale & retail | 1980 |
| Mat-Hjørnet AS | Wholesale & retail | 2004 |
| Matklubben Fauske Da | Hospitality | 2024 |
| Mberntzen Holding AS | | 2026 |
| Mercur Havfiske AS | Agriculture & fishing | 2016 |
| Mesterbygg Fauske AS | Construction | 2013 |
| Miljø Isolering AS | Construction | 2017 |
| Min Nye Eiendom AS | Real estate | 2020 |
| MK Pro AS | Administrative & support | 2025 |
| Moment Salten Aft AS | Education | 2017 |
| Moment Salten AS | Health & social care | 2021 |
| Moment Salten Holding AS | Education | 2022 |
| Mosti Invest AS | Real estate | 2023 |
| MRV AS | Other services | 2022 |
| Multiservice Fauske AS | Construction | 1990 |
| Murmester Sigurd Tverå AS | Construction | 2005 |
| Musicorum AS | Information & communication | 2020 |
| Møller Bygg AS | Construction | 2024 |
| Møllna AS | Manufacturing | 2010 |
| Nanos AS | Financial services | 2001 |
| Napoli 2 AS | Hospitality | 2010 |
| Navjord AS | Real estate | 2008 |
| Navjord Holding AS | Real estate | 2005 |
| NBT Hylle 1 AS | Professional & scientific | 2024 |
| Nettdev AS | Information & communication | 2025 |
| Nevervatn Kraft AS | Energy | 2016 |
| Nico Farvehandel AS | Wholesale & retail | 2007 |
| Nico Håndverk Malermester Sten Yttervik AS | Construction | 1990 |
| Nico Invest AS | Real estate | 2001 |
| NK Holding AS | Wholesale & retail | 2021 |
| Noor Frisør AS | Other services | 2021 |
| Nor-Maskin AS | Construction | 2026 |
| Nor-Montasje AS | Construction | 2018 |
| Norcad AS | Professional & scientific | 2015 |
| Nordavind Energi Nordland AS | Energy | 2025 |
| Nordic Blu AS | Administrative & support | 2019 |
| Nordic Blu Seaweed AS | Agriculture & fishing | 2021 |
| Nordic Blu Technology AS | Professional & scientific | 2020 |
| Nordicfab AS | Manufacturing | 2021 |