| Freb Eiendom AS | Real estate | 2025 |
| Freb Holding AS | Information & communication | 2021 |
| Frol Eiendom AS | Real estate | 2004 |
| Frol Minilager AS | Real estate | 2017 |
| Frost Levanger AS | Wholesale & retail | 2025 |
| FS Bygg Og Eiendom AS | Real estate | 2013 |
| FS Maskin AS | Construction | 2005 |
| FS Utleie AS | Professional & scientific | 2016 |
| Fugsta Holding AS | | 2025 |
| Future-Eiendom AS | Real estate | 2005 |
| Galleri Fenka AS | Wholesale & retail | 2017 |
| Gamle Kongeveg Nord 6 AS | Real estate | 2016 |
| Garoa AS | Professional & scientific | 2021 |
| Geir Løvås AS | Wholesale & retail | 1989 |
| Genitus Software AS | Information & communication | 2018 |
| Gera Heim AS | Real estate | 2025 |
| Getz Invest AS | | 2020 |
| GGF Holding AS | | 2025 |
| Gil Holding AS | Real estate | 1999 |
| Gil Holding AS | | 2026 |
| Gilas AS | Real estate | 2021 |
| Gildevangen AS | Real estate | 2011 |
| Gilinvest AS | Financial services | 2005 |
| Gilstad Assets AS | | 2025 |
| Gilstad Eiendom AS | Real estate | 1979 |
| Gjemble Søndre AS | Real estate | 2022 |
| GKN 437 AS | Real estate | 2024 |
| GKV 1 AS | Real estate | 2025 |
| Glasstårnet Ans | Arts & recreation | 1989 |
| Gobin AS | Real estate | 2005 |
| Granås Holding AS | | 2019 |
| Gras Da | Arts & recreation | 2018 |
| Grendel Evidensbasert Psykologi AS | Health & social care | 2020 |
| Gråmyra Bil Og Fritid AS | Wholesale & retail | 2014 |
| Gråmyra Eiendom AS | Real estate | 2009 |
| Gråmyra Næringspark AS | Real estate | 2013 |
| Gtavhl AS | Hospitality | 2022 |
| Gulliksen Tømrer Service AS | Construction | 2021 |
| Gullsmed Pettersen AS | Wholesale & retail | 2001 |
| Guma Eiendom AS | Real estate | 2022 |
| Gustad Samdrift Da | Agriculture & fishing | 1977 |
| Gvido AS | Professional & scientific | 2015 |
| Gympodden AS | Information & communication | 2021 |
| H-2 Invest AS | Real estate | 2015 |
| H.L.Holberg Holding AS | | 2025 |
| Haakon Invest AS | | 2024 |
| Hag Maskinlag SA | Agriculture & fishing | 2003 |
| Hallem Invest AS | | 2020 |
| Haloma AS | | 2025 |
| Halos AS | | 2021 |
| Halsan Grendehus Bjørkheim SA | Real estate | 1984 |
| Halsan Kjøtt AS | Manufacturing | 2013 |
| Halvorsen Anlegg AS | Construction | 2024 |
| Halvorsen Pukk & Transport AS | Transport & logistics | 2025 |
| Halvorsen Utleie AS | Administrative & support | 2025 |
| Harald Vadla AS | Health & social care | 1997 |
| Has Holding Levanger AS | Wholesale & retail | 2016 |
| Haugan Maskinlag SA | Administrative & support | 2015 |
| Haugland Skjelbred AS | | 2020 |
| Havfruvegen 4 AS | Real estate | 2024 |
| Havna Småbåtforening Ba | Arts & recreation | 2003 |
| Havneveien 15 AS | Real estate | 1993 |
| HD Utleie Levanger Ans | Administrative & support | 1999 |
| Heggli Invest AS | Real estate | 2008 |
| Hegle Maskinlag SA | Agriculture & fishing | 1998 |
| Heieråsen Byggservice AS | Construction | 2023 |
| Hejotech AS | Wholesale & retail | 2023 |
| Helga Den Fagres Gate 12 AS | Real estate | 2025 |
| Helga Den Fagres GT 10 AS | Real estate | 2008 |
| Helga Den Fagresgt 12 AS | Real estate | 1999 |
| Helmersen VVS Og Varmepumper AS | Construction | 2011 |
| Helse Og Glede AS | Wholesale & retail | 2015 |
| Henke Invest AS | Professional & scientific | 2014 |
| HG3 Eiendom AS | Real estate | 2006 |
| HGL Holding AS | Financial services | 2006 |
| HHA17 AS | Real estate | 2017 |
| Hi Eiendom AS | Real estate | 2023 |
| Hige Holding AS | Wholesale & retail | 2005 |
| High Pressure Nerd AS | Education | 2020 |
| Hilex Finans AS | Real estate | 2005 |
| Hkwr AS | Information & communication | 2014 |
| HL Timing AS | Education | 2021 |
| Hojem Samdrift Da | Agriculture & fishing | 1974 |
| Holter H AS | Health & social care | 2020 |
| HPT Invest AS | Transport & logistics | 1985 |
| HS Transport Levanger AS | Transport & logistics | 2008 |
| Hudpoliklinikken Levanger AS | Health & social care | 2018 |
| Hugal Eiendom AS | Real estate | 2020 |
| Hugget Sportsfiske AS | Wholesale & retail | 2020 |
| Hugos Holding AS | Arts & recreation | 2016 |
| Hugos Tivoli AS | Arts & recreation | 2016 |
| Hunderommet AS | Wholesale & retail | 2013 |
| Husby Optikk Levanger AS | Wholesale & retail | 2017 |
| Husfliden - Levanger AS | Wholesale & retail | 2007 |
| Hustad Getz Invest AS | Financial services | 2017 |
| Hveding AS | Professional & scientific | 2023 |
| Hytte- Og Friluftsmessen AS | Administrative & support | 2024 |
| Hærolafossen AS | | 2025 |
| Hørselssenteret AS | Health & social care | 2015 |
| Høyby Holding AS | Real estate | 2017 |