| Fuglemo Holding AS | Real estate | 2016 |
| Fuglesangdahl AS | Construction | 2007 |
| Fuglesangdahl Bolig AS | Real estate | 2016 |
| Fuglestrand Invest AS | | 2024 |
| Fuglvika Holding AS | Wholesale & retail | 2010 |
| Future.Ai AS | Information & communication | 2023 |
| Fyret Sauna AS | Other services | 2024 |
| Fyrgata Legekontor AS | Health & social care | 2024 |
| Føinum Eiendom AS | Real estate | 1998 |
| Føinumgården Eiendom AS | Real estate | 2025 |
| Følling Grendehus SA | Hospitality | 1935 |
| Følling Maskinlag SA | Agriculture & fishing | 1991 |
| Føllingstua AS | Hospitality | 2018 |
| Føllingstua Camping & Resort AS | Hospitality | 2019 |
| Førerkortsenteret Steinkjer AS | Education | 2021 |
| Førstehjelp Eiendom AS | Wholesale & retail | 2002 |
| G5 Bil AS | Wholesale & retail | 2023 |
| Galleriet Leker Og Lærvare AS | Wholesale & retail | 1999 |
| Galliano AS | Information & communication | 2024 |
| Galliano Holding AS | Information & communication | 2024 |
| Garden Shop AS | Wholesale & retail | 2025 |
| Gardenia Holding AS | Real estate | 2005 |
| Garre Holding AS | Real estate | 2026 |
| Gaulstad Beitelag | Agriculture & fishing | 1983 |
| Gaundal Byggservice AS | Construction | 2019 |
| Ge-Ri Invest AS | Financial services | 2014 |
| Gemi Boats Scandinavia AS | Wholesale & retail | 2017 |
| GH Eiendom Steinkjer AS | Real estate | 2020 |
| GH Invest Steinkjer AS | Wholesale & retail | 2019 |
| GH Kontor AS | Wholesale & retail | 2019 |
| GH Utleie AS | Administrative & support | 2018 |
| Giebnie Consulting AS | Professional & scientific | 2017 |
| Gipling Eiendom AS | Real estate | 2012 |
| Giskås Holding AS | | 2026 |
| Gjev & Co AS | Professional & scientific | 2017 |
| Glam Lift AS | Health & social care | 2020 |
| Glass Og Ramme AS | Construction | 1999 |
| Gluntan AS | Arts & recreation | 2017 |
| GLW AS | Wholesale & retail | 2018 |
| GML. Dampskibskaia AS | Real estate | 2006 |
| Godt Salg AS | Wholesale & retail | 2018 |
| Gong Asiamat AS | Wholesale & retail | 2012 |
| Granstubben Barnehage Henning AS | Education | 2008 |
| Greenit Ans | Information & communication | 2003 |
| Gressåmoen Fjellgård Ans | Hospitality | 1997 |
| GRG Fjell & Anlegg AS | Construction | 2026 |
| Grimm Eiendom AS | Real estate | 2014 |
| Grimm Holding AS | Real estate | 2014 |
| Grubbis Invest AS | | 2024 |
| Grunderparken AS | Professional & scientific | 2001 |
| Grønn Utvikling AS | Professional & scientific | 2016 |
| Guffi AS | Agriculture & fishing | 2019 |
| Guldbergaunet Eiendom AS | Real estate | 2020 |
| Gullimunn AS | Manufacturing | 2015 |
| Gusthaugen Trøsklag SA | Agriculture & fishing | 2008 |
| GVG Planstyring AS | Financial services | 2013 |
| H. Dyrstad Holding AS | Administrative & support | 2013 |
| Haavabeget Tomteutvikling AS | Real estate | 2018 |
| Hair. Frisør AS | Other services | 2024 |
| Hajoco AS | | 2024 |
| Halgeir Holien AS | Administrative & support | 2022 |
| Halger Fjellvik Regnskapskontor AS | Professional & scientific | 1993 |
| Hallgeir Sagmo AS | Construction | 2007 |
| Halseth Holding AS | Information & communication | 2020 |
| Hamawa AS | | 2021 |
| Handelshuset Sentrum Steinkjer AS | Wholesale & retail | 2025 |
| Handelshuset Steinkjer AS | Wholesale & retail | 2022 |
| Handelshuset Steinkjer Eiendom AS | Real estate | 2025 |
| Hannes Brudesalong AS | Wholesale & retail | 2019 |
| Hansen Holding AS | | 2003 |
| Hare Holding AS | | 2023 |
| Hatling Samdrift Da | Agriculture & fishing | 2000 |
| Haugan Maskinring Ba | Agriculture & fishing | 2000 |
| Haugum Utvikling AS | Financial services | 2013 |
| Havkatt AS | Agriculture & fishing | 2023 |
| HDH Bygg AS | Construction | 2025 |
| Hegge Sameieskog Da | Agriculture & fishing | 2022 |
| Heidi Sagmo Eiendom AS | Real estate | 2016 |
| Heiga Holding AS | Health & social care | 2024 |
| Heimlaga AS | Wholesale & retail | 2016 |
| Hellen Samdrift Da | Agriculture & fishing | 2024 |
| Hellin Eiendom AS | Hospitality | 2011 |
| Helseservice AS | Manufacturing | 2014 |
| Heltuv Fellesfjøs Da | Agriculture & fishing | 2006 |
| Henning Samdrift Da | Agriculture & fishing | 2018 |
| Henning-Bygg AS | Construction | 2022 |
| Hermann Bil AS | Wholesale & retail | 2022 |
| Hervikbygg AS | Construction | 2001 |
| Hervikmarka Tomteutvikling AS | Professional & scientific | 2014 |
| Hilmar AS | Arts & recreation | 2011 |
| Hima AS | Wholesale & retail | 2000 |
| Himm AS | Financial services | 2011 |
| Hindklev Kapitalforvaltning AS | Real estate | 2020 |
| Hirda AS | Real estate | 2024 |
| HJK Eiendom AS | Other services | 2021 |
| Hjort Knudsen | Transport & logistics | 2011 |
| Hjort Knudsen Norge AS | Professional & scientific | 2010 |
| Hobby Pictures Da | Information & communication | 2001 |
| Hodlingrevling AS | | 2024 |
| Holan Maskin Og Transport AS | Construction | 2017 |