| Johan Rist Holding AS | | 2022 |
| Johansen Holding AS | Real estate | 1993 |
| Johnny Selsbakk AS | Wholesale & retail | 2005 |
| Johnsen & Abelsen Maskinentreprenør Ans | Construction | 2000 |
| Jol AS | Real estate | 2005 |
| Jomi Holding AS | Real estate | 2016 |
| Jonimy AS | | 2021 |
| Jordbruksveien 48-50 AS | Real estate | 2015 |
| Jordbærpikene City Nord AS | Hospitality | 2016 |
| Jordmor-Ultralyd Og Kvinnesenter AS | Health & social care | 2023 |
| Jostehan Invest AS | Real estate | 2019 |
| Jotu AS | Real estate | 2019 |
| Jovil AS | Hospitality | 2008 |
| Joy Band AS | Information & communication | 2023 |
| Joy Medispa AS | Health & social care | 2022 |
| JP Hauge Holding AS | | 2025 |
| JP Manuellterapi AS | Health & social care | 2015 |
| Jpcn AS | Real estate | 2021 |
| Jra AS | Construction | 2016 |
| JRJ Invest AS | | 2024 |
| JS Boligutleie AS | Real estate | 2020 |
| JT Riley AS | Professional & scientific | 2022 |
| JTH Invest AS | | 2021 |
| Juleland AS | Wholesale & retail | 2022 |
| Julie Trafikkskole AS | Education | 2021 |
| Julius Jakhelln AS | Wholesale & retail | 2019 |
| Jungen Holding AS | Real estate | 2016 |
| Junkerdalen AS | Real estate | 2015 |
| Juridica Rettshjelp AS | Professional & scientific | 2020 |
| Just Padel Bodø AS | Arts & recreation | 2021 |
| Justad Rorbuer Og Vandrehjem AS | Hospitality | 2023 |
| Juvika Eiendom AS | Real estate | 2021 |
| JV Johansen Holding AS | Real estate | 2008 |
| JVJ AS | Other services | 2017 |
| K Nilsen-Nygaard AS | Wholesale & retail | 1997 |
| K Trans Invest AS | Financial services | 2007 |
| K. Hansen Optik AS | Wholesale & retail | 2007 |
| K.K Maskin AS | Construction | 2016 |
| K.O.Smaage Invest AS | | 2024 |
| K.P. Invest AS | Construction | 2005 |
| Ka's AS | | 2009 |
| Kaare AS | Real estate | 2023 |
| Kafo AS | Hospitality | 2018 |
| Kaikanten Bodø AS | Real estate | 2019 |
| Kaira AS | Other services | 2012 |
| Kajeima Holding AS | | 2025 |
| Kallia AS | Information & communication | 2015 |
| Kamine Invest AS | | 2017 |
| Kanskje AS | Arts & recreation | 2016 |
| Kapabel Helse & Idrett AS | Health & social care | 2017 |
| Kapnord AS | Professional & scientific | 2006 |
| Kappa Holding AS | Real estate | 1997 |
| Karianne AS | Agriculture & fishing | 2018 |
| Karlsens AS | Construction | 2019 |
| Karlsens Billakkering AS | Other services | 1985 |
| Karoto Holding AS | | 2025 |
| Karrierepiloten AS | Education | 2022 |
| Karu Rivningsservice Ans | Construction | 1997 |
| Kasmi AS | Real estate | 2019 |
| Kaspersen IT AS | Information & communication | 2025 |
| Katla Consult AS | Arts & recreation | 2025 |
| Katla Drift AS | Administrative & support | 2026 |
| Kausalhelse AS | Health & social care | 2022 |
| KB Eiendomsutvikling Ans | Real estate | 2005 |
| KB Lager Hunstad AS | Transport & logistics | 2024 |
| KBK Trading AS | | 2022 |
| Kcanlegg AS | Administrative & support | 2025 |
| Kebo Eiendom AS | Real estate | 1972 |
| Keiservarden AS | Financial services | 2006 |
| Ken Hansen AS | Real estate | 2020 |
| Ken Hansen Holding AS | Real estate | 2022 |
| Kernel AS | Information & communication | 2016 |
| Keru Eiendom AS | Real estate | 2014 |
| KFD Holding AS | | 2025 |
| KFS Holding AS | | 2023 |
| KG Livsstil AS | Wholesale & retail | 2016 |
| KGH Invest AS | Real estate | 2005 |
| Kibsgård Manuellterapi AS | Health & social care | 2014 |
| Kiddo AS | | 2024 |
| Kie AS | Wholesale & retail | 2024 |
| Kima-Med AS | Wholesale & retail | 2005 |
| Kioskdrift Jacobsen AS | Wholesale & retail | 2021 |
| Kioskdrift Olaussen AS | Wholesale & retail | 2025 |
| Kirkeparken Eiendom AS | Real estate | 2018 |
| KJB Finans AS | Real estate | 2016 |
| Kjellbakk AS | Construction | 2005 |
| Kjelstad Holding AS | Wholesale & retail | 2017 |
| Kjeminor AS | Wholesale & retail | 2025 |
| Kjerringøy Bolig AS | Real estate | 2002 |
| Kjerringøy Eiendom AS | Real estate | 2004 |
| Kjeveortoped Alst AS | Health & social care | 1994 |
| Kjoler Og Sånn AS | Wholesale & retail | 2019 |
| Kjøkkenhuset Bodø AS | Wholesale & retail | 2011 |
| Kjøpstad Finans AS | | 2024 |
| Kjøretøyspesialisten Bodø AS | Other services | 2002 |
| Klare Finans AS | Financial services | 2005 |
| Klare Inkasso AS | Administrative & support | 2011 |
| Kleiva 25 AS | Real estate | 2016 |
| Kleivås AS | Real estate | 2015 |
| Klette Bygg Og Montasje AS | Construction | 2025 |