| Frihelg AS | Professional & scientific | 2005 |
| FRISK3 Mosjøen AS | Arts & recreation | 2008 |
| Friskgården Helgeland AS | Health & social care | 2019 |
| Frisørstuo AS | Other services | 2007 |
| Frisørtorget AS | Other services | 2003 |
| Fritidinord AS | Administrative & support | 2023 |
| Fritidssentret AS | Wholesale & retail | 1981 |
| Fru Haugans Eiendom AS | Hospitality | 2019 |
| Fundra AS | Construction | 2013 |
| Fusam Forvaltningslag SA | Real estate | 2018 |
| Fushá Velvære for Han Og Henne AS | Other services | 2018 |
| Futuroauto AS | Wholesale & retail | 2024 |
| Galleri Sos AS | Arts & recreation | 2016 |
| Galleria AS | Arts & recreation | 2018 |
| Gallion AS | Professional & scientific | 1996 |
| Garm Eiendom AS | Real estate | 2020 |
| Gdo & Jacki AS | Real estate | 2023 |
| Ggwp AS | Real estate | 2018 |
| Gilles AS | Hospitality | 2024 |
| Gjerstad Pyro AS | Wholesale & retail | 2013 |
| Gk-Holding AS | Real estate | 2022 |
| Goldman AS | | 2022 |
| Granmo Eiendom AS | Real estate | 2013 |
| Granmo Invest AS | | 2020 |
| Grytåga Settefisk AS | Agriculture & fishing | 1997 |
| Grytåga Settefisk Drift AS | Agriculture & fishing | 2016 |
| Gullsmed Rørvik AS | Wholesale & retail | 2011 |
| Guni AS | Wholesale & retail | 1994 |
| Gårdsopplevelser Nord SA | Health & social care | 2000 |
| Gøy På Landet Ans | Agriculture & fishing | 2018 |
| Habe Invest AS | | 2024 |
| Hagfors Invest AS | Real estate | 2016 |
| Halsøy Frisørsalong AS | Other services | 2000 |
| Hamarheim Eiendom AS | Real estate | 2015 |
| Hammer Tekstilagentur AS | Wholesale & retail | 2002 |
| Handelshuset Mosjøen AS | Wholesale & retail | 2009 |
| Hanefoten Fotklinikk AS | Health & social care | 2026 |
| Hanøytangen Næringspark AS | Real estate | 2019 |
| Harald Granmo AS | Construction | 2021 |
| Haugan Bygg & Maskin AS | Construction | 2013 |
| Hauketoppen AS | | 2023 |
| Havdamp Sauna AS | Other services | 2026 |
| Havna Eiendom AS | Real estate | 1995 |
| Havnegata 35 AS | Real estate | 2025 |
| Havnegata 37A AS | Real estate | 2025 |
| Havnegt 74 AS | Real estate | 1997 |
| Hbmu Eiendom AS | Other services | 2017 |
| Hbmu Invest AS | Administrative & support | 2018 |
| Headline AS | Other services | 2013 |
| Hege Olsen Butikkdrift AS | Wholesale & retail | 2016 |
| Heilhornet Invest AS | Hospitality | 2023 |
| Heim Boligutvikling AS | Real estate | 2021 |
| Heimstad BYGG1 AS | Wholesale & retail | 1979 |
| Heine Eiendom AS | Real estate | 2021 |
| Helgeland Asv AS | Health & social care | 1988 |
| Helgeland Bemanning AS | Administrative & support | 2024 |
| Helgeland Bil Og Maskinutleie AS | Administrative & support | 2005 |
| Helgeland Bilberging AS | Transport & logistics | 2023 |
| Helgeland Bolig Bygg AS | Real estate | 2003 |
| Helgeland Bolig- Og Hytteutvikling AS | Real estate | 2006 |
| Helgeland Boligutvikling AS | Real estate | 2017 |
| Helgeland Byggekontroll AS | Professional & scientific | 1998 |
| Helgeland Byggeservice AS | Construction | 2016 |
| Helgeland Dyreklinikk AS | Professional & scientific | 2001 |
| Helgeland Event AS | Arts & recreation | 2007 |
| Helgeland Folkehøyskole AS | Education | 2023 |
| Helgeland Fritidsservice AS | Other services | 2016 |
| Helgeland Hogst AS | Agriculture & fishing | 2018 |
| Helgeland Industrier AS | Health & social care | 1975 |
| Helgeland Kraft AS | Energy | 2016 |
| Helgeland Kraft Strøm AS | Energy | 2016 |
| Helgeland Kraft Utvikling AS | Professional & scientific | 2023 |
| Helgeland Kraft Vannkraft AS | Energy | 2016 |
| Helgeland Landbrukstjenester SA | Agriculture & fishing | 1995 |
| Helgeland Maskin AS | Wholesale & retail | 1989 |
| Helgeland Møbelsenter AS | Wholesale & retail | 1995 |
| Helgeland Næringseiendom AS | Real estate | 1996 |
| Helgeland Portservice AS | Wholesale & retail | 2013 |
| Helgeland Smådyrkrematorium AS | Other services | 2025 |
| Helgeland Sparebanks Eiendomsselskap AS | Real estate | 1982 |
| Helgeland Trefiberisolering AS | Construction | 2019 |
| Helgeland Treforedling AS | Manufacturing | 2022 |
| Helgeland Utleie Service AS | Administrative & support | 2021 |
| Helgeland Ventilasjon AS | Manufacturing | 2013 |
| Heli-Invest AS | Transport & logistics | 2011 |
| Hella Rental AS | Administrative & support | 2023 |
| Herring Regnskapsservice AS | Professional & scientific | 2021 |
| Herringen Bygdahus SA | Real estate | 2015 |
| Hev Gruppen AS | Arts & recreation | 2021 |
| Hjørnerød Transport AS | Transport & logistics | 2021 |
| HK Mote AS | Wholesale & retail | 2005 |
| Hmsi AS | Health & social care | 2021 |
| Hobbysenteret Mosjøen AS | Wholesale & retail | 1997 |
| Holandsvika Bomiljø AS | Manufacturing | 2011 |
| Holandsvika Industri AS | Water & waste | 2016 |
| Holm Veiteknikk AS | Professional & scientific | 2022 |
| Hotel Milano AS | Hospitality | 2005 |
| Hovslager Daniel Ravatsås AS | Agriculture & fishing | 2019 |
| HTS Mosjøen AS | Transport & logistics | 2015 |
| Husfliden AS | Wholesale & retail | 1976 |