| Hermann Wildenveys GT. 1 AS | Real estate | 1992 |
| Herr Og Fru Handy AS | Construction | 2022 |
| Hesa Group AS | | 2023 |
| Hesjevik Elektro AS | Construction | 2026 |
| Hi North AS | Administrative & support | 2015 |
| Hide AS | Construction | 2010 |
| Hilvardin Invest AS | Professional & scientific | 2010 |
| Holmvik Bredvold AS | Arts & recreation | 2024 |
| Horvnes Eiendom AS | Real estate | 2011 |
| Horvnesveien 70 AS | Real estate | 1998 |
| Hud by Strand AS | Other services | 2010 |
| Hurra Helgeland AS | Hospitality | 2019 |
| Hønshuset AS | Manufacturing | 2022 |
| Høy Klasse AS | Real estate | 2021 |
| Ida Kjellbakk AS | Wholesale & retail | 2025 |
| Immobiliare Investor AS | Wholesale & retail | 2016 |
| Imo Mare AS | Professional & scientific | 2022 |
| Ingeniør R E Iversen AS | Professional & scientific | 2017 |
| Ingjerd Og Peter Eiendom AS | Wholesale & retail | 2004 |
| Ingjerd Og Peter Holding AS | Wholesale & retail | 2005 |
| Insitu Eiendom AS | Real estate | 2018 |
| Interiør Service Helgeland AS | Construction | 2001 |
| Inwel Performance AS | Agriculture & fishing | 2023 |
| Inwst AS | | 2021 |
| Ivarhavn AS | Real estate | 1997 |
| Ivo AS | Wholesale & retail | 1993 |
| Jan Sørra Holding AS | Real estate | 2009 |
| Jens Tangen Bygg Og Vedlikehold AS | Construction | 2018 |
| JHK Holding Sandnessjøen AS | | 2024 |
| Jic Holding AS | Real estate | 2001 |
| JKP Invest AS | Real estate | 2024 |
| Jon Sivertsen AS | Health & social care | 2012 |
| Josse Invest AS | Professional & scientific | 2010 |
| Jr-Consulting AS | Professional & scientific | 2022 |
| Justad Utleie AS | Real estate | 2012 |
| Jusy AS | | 2023 |
| Jægtvik Eiendom AS | Real estate | 2008 |
| Jægtvik Kran Og Transport AS | Transport & logistics | 1996 |
| K Nordøy Invest AS | | 2023 |
| K.O. Talseth Holding AS | | 2024 |
| K11 Invest AS | | 2021 |
| Kaffekverna AS | Hospitality | 2018 |
| Karlsen Eiendom Ans | Real estate | 2003 |
| Keystone Estates AS | Real estate | 2012 |
| Keystone Global AS | Real estate | 2014 |
| KGT 31 AS | Real estate | 2020 |
| King Barbershop AS | Other services | 2024 |
| Kioskdrift Anette AS | Wholesale & retail | 2023 |
| Kirkhus Samdrift Ans | Agriculture & fishing | 1998 |
| Kjeveortoped Henriette Tostrup Aas AS | Health & social care | 2017 |
| Kjøpmann Rosø AS | Wholesale & retail | 2026 |
| Kjøpmannsgruppen AS | | 2025 |
| Klausen Service AS | Administrative & support | 2025 |
| Klimateknikk AS | Construction | 1996 |
| Ko Teknikk AS | Professional & scientific | 2015 |
| Kohinor AS | | 2022 |
| Kollektivhagen Syv Søstre AS | Hospitality | 2021 |
| Kolonialen Drift AS | Hospitality | 2026 |
| Kompetanseutvikling Helgeland AS | Professional & scientific | 2017 |
| Kong Inges Gate AS | Real estate | 2011 |
| Konradsen Invest AS | | 2023 |
| Konsuline AS | Professional & scientific | 2014 |
| Krisj Invest AS | | 2023 |
| Kurant Da | Professional & scientific | 2015 |
| Kuttner Holding AS | | 2021 |
| KVN 38 AS | Real estate | 2018 |
| Kynsveen Eiendom AS | Real estate | 2021 |
| Kystkapital AS | | 2023 |
| Kystservice Helgeland AS | Manufacturing | 2015 |
| L.C. Johansen Holding AS | | 2026 |
| Lamesa Catering AS | Hospitality | 2020 |
| Lan Tek AS | Administrative & support | 1989 |
| Land Eiendom AS | | 1997 |
| Laurentum AS | | 2026 |
| Lauvøylandet Småbåthavn SA | Arts & recreation | 2019 |
| Lavigove AS | | 2008 |
| Lavollen AS | Real estate | 1997 |
| Leansa AS | Financial services | 2018 |
| Lege Marianne Valnes AS | Health & social care | 2015 |
| Leira 12 Eiendom AS | Wholesale & retail | 2012 |
| Leonh L Sørra & Co AS | Real estate | 1928 |
| Letsea Innovation AS | Professional & scientific | 2022 |
| LK Catering AS | Hospitality | 2024 |
| Loeng AS | Real estate | 1998 |
| Logsys AS | Professional & scientific | 2005 |
| Lta Invest AS | Real estate | 2012 |
| LTN AS | Real estate | 2016 |
| LTV AS | Real estate | 2022 |
| Lundstø Holding AS | Real estate | 2021 |
| Lyntekk AS | Information & communication | 2025 |
| Lysvold AS | Professional & scientific | 2019 |
| M.Larsen Invest AS | Real estate | 2016 |
| Maggro Holding AS | | 2025 |
| Marjak Holding AS | | 2023 |
| Marlene Karlsen Fysioterapi AS | Health & social care | 2025 |
| Mathisen Butikkdrift AS | Wholesale & retail | 2013 |
| Mathisen Elektro AS | Construction | 1982 |
| Matja Holding AS | Professional & scientific | 2019 |
| Matsenteret Arne Og Ivar Pettersen | Wholesale & retail | 1972 |
| Mave Invest AS | | 2021 |