| Helseinnovatørene Narvik AS | Real estate | 2019 |
| Helsekost AS | Wholesale & retail | 2017 |
| Hemink Transport | Transport & logistics | 2011 |
| Hernor Invest AS | Real estate | 2018 |
| HFH Eiendom Ans | Real estate | 2009 |
| HFS Holding AS | Health & social care | 2017 |
| High Tech Solutions Nord AS | Professional & scientific | 2015 |
| Himmelblaa AS | Professional & scientific | 2012 |
| Hms-Partner Stig Bolle Svein Rydholt Da | Professional & scientific | 1997 |
| Hmsl Holding AS | Financial services | 2018 |
| HN Taxidrift AS | Transport & logistics | 2022 |
| Hobra Invest AS | Real estate | 2014 |
| Holi Holding AS | | 2025 |
| Holmen Bilservice AS | Other services | 2011 |
| Holmlund Oljeservice AS | Wholesale & retail | 1999 |
| Holtet Eiendommer AS | Real estate | 2019 |
| Hoppensprett Barnehage Soltoppen AS | Education | 2022 |
| HRS Bioressurs AS | Water & waste | 2024 |
| HRS Husholdning AS | Water & waste | 2008 |
| HRS Miljø AS | Water & waste | 2003 |
| Hålogaland Lås & Sikkerhet AS | Manufacturing | 2018 |
| Hålogaland Revisjon AS | Professional & scientific | 1983 |
| Hålogaland Syn Og Øye AS | Health & social care | 2012 |
| Hålogalandsnett Ans | Information & communication | 2000 |
| Håndverkscompagniet AS | Construction | 2002 |
| Håreks Gate 58 60 Narvik AS | Real estate | 2022 |
| Håreksgate 10 AS | Real estate | 2021 |
| Håreksgate Bolig AS | Real estate | 2017 |
| Hårstrået Frisør Narvik AS | Other services | 2015 |
| I-Sak AS | Professional & scientific | 2022 |
| Ice Mate AS | Professional & scientific | 2017 |
| Iholding AS | | 2026 |
| Imcd Holding AS | Real estate | 2025 |
| Impact Solution Norway AS | Wholesale & retail | 2021 |
| Incarthe Invest AS | | 2005 |
| Indira AS | Professional & scientific | 2013 |
| Indira Holding AS | Professional & scientific | 2013 |
| Indira Utvikling AS | Real estate | 2020 |
| Indre Havn Eiendom Narvik AS | Real estate | 2020 |
| Industristubben 6 AS | Real estate | 2006 |
| Industriveien 12 Narvik AS | Real estate | 2021 |
| Industriveien 2-4 Narvik AS | Real estate | 2022 |
| Ingebrigtsen & Sønn Eiendom AS | Real estate | 2025 |
| Ingeniør Granberg AS | Professional & scientific | 2014 |
| Ingeniør Marius Kristiansen AS | Professional & scientific | 2024 |
| Ingeniørfirma T Jespersen AS | Construction | 2001 |
| Inova IT AS | Information & communication | 2013 |
| Insian AS | | 2019 |
| Institutt for Manuell Terapi Da | Health & social care | 1998 |
| Insu El Tech AS | Professional & scientific | 2019 |
| Invest I AS | Real estate | 2019 |
| Iski AS | Professional & scientific | 2020 |
| Isos AS | Real estate | 2000 |
| Isos Eiendom AS | Real estate | 2006 |
| Isos Utvikling AS | Construction | 2026 |
| Ivar Kjell Eiendom Ans | Real estate | 2002 |
| J&R Event AS | Administrative & support | 2026 |
| J.Enevoldsen Holding AS | Construction | 2021 |
| J.Garnes Holding AS | | 2026 |
| J.K Bygg AS | Construction | 2023 |
| JACOBS1 Holding AS | | 2020 |
| Jaklamyra Barnehage SA | Education | 1989 |
| Jaksland Holding AS | | 2026 |
| JB Energy Solutions AS | Professional & scientific | 2025 |
| Jce Holding AS | Financial services | 2015 |
| Jenbacher | Wholesale & retail | 2014 |
| Jenssen & Bolle Eiendomsmegling AS | Real estate | 2002 |
| Jenssen Taxi AS | Transport & logistics | 2021 |
| Jernbanecaféen AS | Hospitality | 2022 |
| Jernbanemateriell AS | Administrative & support | 2020 |
| JGINVEST68 AS | | 2022 |
| Jke Narvik AS | Wholesale & retail | 2010 |
| JM Føre AS | Construction | 2021 |
| Jofo Holding AS | | 2022 |
| Johnsson Holding AS | | 2026 |
| Jor AS | Hospitality | 2025 |
| Jordbærpikene Narvik AS | Hospitality | 2014 |
| Josu Media AS | Information & communication | 2020 |
| JP Retail AS | Wholesale & retail | 2022 |
| JS Fysioterapi AS | Health & social care | 2020 |
| Jso Bygg | Construction | 2019 |
| Just Eiendom AS | Real estate | 2007 |
| Just Holding AS | Wholesale & retail | 2005 |
| Juvikdalen Vannverk SA | Water & waste | 2002 |
| Jåriseth AS | Agriculture & fishing | 2023 |
| K & K Invest AS | | 2025 |
| K 24 Eiendom AS | Real estate | 2016 |
| K-B Invest AS | | 2021 |
| Kast Og Vask AS | Construction | 2021 |
| Kef AS | Manufacturing | 2021 |
| Ketil Holding AS | Transport & logistics | 2005 |
| Keyz Netthandel AS | Wholesale & retail | 2025 |
| KGT Drift AS | Administrative & support | 2020 |
| KGT Eiendom II AS | Real estate | 2021 |
| KGT Holding AS | Administrative & support | 2015 |
| KGT- 31 AS | Real estate | 2022 |
| Kinetic International B.V. Nuf | Professional & scientific | 2025 |
| Kinobakken 1 AS | Real estate | 2021 |
| Kirkeparken AS | Real estate | 2024 |
| Kiropraktorklinikken Narvik AS | Health & social care | 2005 |