| Entusiasme AS | | 2021 |
| Erik & Anne Berit Holding AS | | 2021 |
| Erik Glæstad Holding AS | Financial services | 2005 |
| Erland Og Rune Holm Ans | Agriculture & fishing | 1997 |
| Ernæring- Og Helseklinikken AS | Health & social care | 2024 |
| Esmart AS | Professional & scientific | 2018 |
| Espen Mørk AS | Health & social care | 2005 |
| Espen Simensen Holding AS | Information & communication | 2019 |
| Espen Øye Amundsen AS | Health & social care | 2007 |
| Et Bil AS | | 2019 |
| Etc Electric Time Car AS | Information & communication | 2003 |
| Eth Holding AS | Professional & scientific | 2015 |
| Evenola Invest AS | | 2021 |
| Evenrud Invest AS | | 2022 |
| Eventyrlig AS | Administrative & support | 2020 |
| Evolution Norge AS | Professional & scientific | 2006 |
| Excel Utvikling AS | Information & communication | 1998 |
| Fagsenter AS | Education | 2016 |
| Fagskolen Innlandet Kantina Ans | Hospitality | 1991 |
| Fahed Frisør AS | Other services | 2026 |
| Fahlstrøm Bar & Grill AS | Hospitality | 2024 |
| Fakkelgården AS | Real estate | 1992 |
| Faks Bolig AS | Professional & scientific | 2015 |
| Fam. Adams AS | Financial services | 2005 |
| Fauno AS | Hospitality | 2018 |
| Fautvegen 10 AS | Real estate | 2026 |
| Feelgood Gjøvik AS | Arts & recreation | 2020 |
| Femmet AS | Real estate | 2004 |
| FG Gruppen AS | | 2019 |
| Fiero Games AS | Information & communication | 2020 |
| Figaro Invest AS | | 2026 |
| Figuras AS | Professional & scientific | 2019 |
| Finstuen Eiendom AS | Real estate | 2007 |
| Fjelds Eiendom AS | Real estate | 2020 |
| Fjellet Eiendomsutvikling AS | Real estate | 2020 |
| Fjellhallen Service AS | Hospitality | 1995 |
| Fjellstad Invest AS | Professional & scientific | 2005 |
| Fjordsales AS | Professional & scientific | 2023 |
| Flishaugen Holding AS | Wholesale & retail | 2013 |
| Flugstad Consulting AS | Real estate | 2006 |
| Fly-In AS | | 2016 |
| Flytfinans AS | Financial services | 2024 |
| FM Miljøprodukter AS | Wholesale & retail | 2017 |
| Fodal Holding AS | | 2019 |
| Fondant Invest AS | Real estate | 2022 |
| Fontenehuset Gjøvik AS | Health & social care | 2017 |
| Fontus AS | Professional & scientific | 2023 |
| Food Heaven AS | Hospitality | 2024 |
| Food Invest AS | Real estate | 2020 |
| Footlab Norge AS | Education | 2021 |
| Forbes United AS | | 2024 |
| Forsberger Holding AS | | 2021 |
| Fortress Holding AS | Professional & scientific | 2020 |
| Fotograf Torben AS | Professional & scientific | 2026 |
| Four Season AS | Wholesale & retail | 2017 |
| Fredensborg Butikkeiendom AS | Real estate | 2020 |
| Fredevika Holding AS | Real estate | 2017 |
| Fredrik Øverli AS | Wholesale & retail | 2023 |
| Freidar Holding AS | | 2024 |
| Fres Utvikling AS | Real estate | 2013 |
| Frisikt AS | Administrative & support | 2012 |
| Frisikt IT AS | Information & communication | 2022 |
| Frisikt Vest AS | Professional & scientific | 2007 |
| Frisinger Invest AS | | 2005 |
| Fritid Og Caravan AS | Administrative & support | 2022 |
| Frostrøyk AS | Information & communication | 2015 |
| Fruseth Holding AS | Financial services | 2018 |
| Fry AS | Real estate | 2019 |
| Fry Holding AS | | 2021 |
| Frøken Mandag AS | Health & social care | 2022 |
| Frøken Mandag Utvikling AS | Education | 2026 |
| FS - Holding AS | | 2008 |
| FSG Invest AS | Financial services | 2015 |
| FTG Holding AS | | 2019 |
| FTL Capital AS | Professional & scientific | 2019 |
| Fuktstopper AS | Construction | 2014 |
| Fullt Fokus Da | Real estate | 2016 |
| Fun Sport AS | Real estate | 2021 |
| Funding AS | | 2021 |
| Gamletorvet Sport AS | Wholesale & retail | 1989 |
| Garda Invest AS | Real estate | 2016 |
| GBP Holding AS | | 2023 |
| GBS Malerservice AS | Construction | 2012 |
| Geir Nyseth AS | Real estate | 2012 |
| Gele AS | | 2022 |
| Geni Invest AS | Financial services | 2008 |
| Gest Consult AS | Professional & scientific | 2009 |
| Gi Oculus AS | Health & social care | 2005 |
| Gigass AS | Administrative & support | 2007 |
| Gjerluvegen AS | Real estate | 2024 |
| Gjærliseter AS | Financial services | 2005 |
| Gjøbi Eiendom AS | Real estate | 1996 |
| Gjøvik Aroma AS | Other services | 2025 |
| Gjøvik Avløserlag SA | Administrative & support | 1995 |
| Gjøvik Biloppretting AS | Other services | 2004 |
| Gjøvik Boligservice Ans | Administrative & support | 2006 |
| Gjøvik Brukt Inventar Ans | | 1988 |
| Gjøvik Butikkeiendom AS | Real estate | 2005 |
| Gjøvik Bygg Og Eiendomsservice AS | Construction | 2017 |
| Gjøvik Campingsenter AS | Hospitality | 2006 |