| Fermentarium AS | Education | 2015 |
| Festmagasinet Standard Strømmen AS | Wholesale & retail | 2018 |
| Fixdesign AS | Construction | 2022 |
| Flamenco Pizza & Grill AS | Hospitality | 2024 |
| Flink Bygg AS | Construction | 2022 |
| Flinteruds Lille Kjøkken Ans | Hospitality | 1993 |
| Flock Eiendom AS | Real estate | 1999 |
| Flock Eiendom II AS | Real estate | 2017 |
| Flori Fliser AS | Construction | 2025 |
| Flyt Trafikkskole AS | Education | 2011 |
| Flyttevaskservice.No AS | Administrative & support | 2026 |
| FM Service AS | | 2026 |
| Folkets Hus Café AS | Hospitality | 2020 |
| Folkets Hus SA, Strømmen | Real estate | 1935 |
| Fom Holding AS | | 2015 |
| Food AS | Manufacturing | 2026 |
| Food Lovers AS | Hospitality | 2026 |
| Forward Consulting AS | Professional & scientific | 2026 |
| Forza Agency AS | Administrative & support | 2022 |
| Foss Sport Aktiv AS | Wholesale & retail | 2021 |
| Foss Sport AS | Wholesale & retail | 2004 |
| Framtid AS | | 2025 |
| Framtidsinvest AS | | 2019 |
| Frances Holding AS | | 2025 |
| Freedom 4 CS Invest AS | Education | 2012 |
| Frisk Pust Renhold Og Eiendom AS | Administrative & support | 2026 |
| Frisør 1 Idrees AS | Other services | 2022 |
| Frøya Sjømat AS | Wholesale & retail | 2024 |
| Full Gass AS | Real estate | 2017 |
| Funtown Da | Wholesale & retail | 2014 |
| Furuset Kjøtt Engros AS | Wholesale & retail | 2024 |
| Furuset Kjøttsentralen AS | Wholesale & retail | 2014 |
| G and C AS | | 2016 |
| G. Evensen Holding AS | Financial services | 2017 |
| Ganh AS | Hospitality | 2019 |
| Gastiq AS | Wholesale & retail | 2024 |
| GCM Transport AS | Transport & logistics | 2021 |
| Gigahjem AS | Wholesale & retail | 2025 |
| Gissi AS | Professional & scientific | 2020 |
| Glassmester Reidar Hesler AS | Construction | 1986 |
| Global Eiendom Oslo AS | Real estate | 2004 |
| Goby Trebygg AS | Construction | 2021 |
| God & Mett Babas Grill AS | Hospitality | 2015 |
| Gof Trans AS | Transport & logistics | 2025 |
| Golden Grillen AS | Hospitality | 2021 |
| Golden Kjøtt AS | Wholesale & retail | 2024 |
| Golly AS | Professional & scientific | 2008 |
| Goodfella AS | | 2017 |
| Gotham Garage AS | Wholesale & retail | 2023 |
| Grand Eiendomsutvikling AS | Real estate | 2017 |
| Greek Star AS | Hospitality | 2025 |
| Green Asian Marked AS | Wholesale & retail | 2022 |
| Grensen Sko Drift AS | Wholesale & retail | 1985 |
| Grill N Roll AS | Hospitality | 2019 |
| Grimsgård AS | | 2025 |
| Growith Holding AS | | 2018 |
| Grytbak Consult AS | Information & communication | 2021 |
| Grønli Og Paixao Design Og Møbler AS | Professional & scientific | 1998 |
| Grønliveien 30 AS | Construction | 2018 |
| Gulden Invest AS | Wholesale & retail | 2005 |
| Gullsaksen AS | Other services | 2024 |
| Guru Kirpa Eiendom AS | Real estate | 2004 |
| Gustav Pillgram Larsen AS | Professional & scientific | 2012 |
| H&S Invest AS | Wholesale & retail | 2012 |
| Haarex AS | Real estate | 2019 |
| Hage Og Grøntanlegg AS | Administrative & support | 2001 |
| Halvor AS | Real estate | 2005 |
| Halvor Eiendom AS | Real estate | 2013 |
| Hanar Marked AS | Wholesale & retail | 2026 |
| Harald Wethal Holding AS | Financial services | 2005 |
| Harvey Holding AS | Administrative & support | 2020 |
| Hassan & Hamza Invest AS | Hospitality | 2026 |
| Hast Trading AS | Wholesale & retail | 2025 |
| Haugens Bilrep & Service AS | Other services | 2012 |
| Hbø Invest AS | | 2023 |
| HCG Revisjon & Rådgivning AS | Arts & recreation | 2023 |
| Heavenly AS | Hospitality | 2024 |
| Heavy Duty Garage AS | Wholesale & retail | 2025 |
| Heftig AS | Professional & scientific | 2018 |
| Heimhusan AS | Real estate | 2013 |
| Helse Holding AS | Health & social care | 2024 |
| Helsfyr Snekkerverksted AS | Manufacturing | 1993 |
| Herdal Invest AS | Real estate | 2026 |
| Hermines Verden AS | Wholesale & retail | 2025 |
| HH Entreprenør AS | Construction | 2023 |
| HJH Invest AS | Real estate | 2006 |
| HKN Invest AS | | 2026 |
| Hoberg Holding AS | Real estate | 2005 |
| Holding IT Together AS | | 2026 |
| Holdme AS | | 2019 |
| Holestøl Fysioterapi AS | Health & social care | 2022 |
| House of Shawarma AS | Hospitality | 2024 |
| Hud & Fot AS | Health & social care | 2024 |
| Hudi AS | Professional & scientific | 2022 |
| Huenx AS | Information & communication | 2025 |
| Human Horizons AS | Wholesale & retail | 2023 |
| Huong Que Supermakret AS | Wholesale & retail | 2022 |
| Hus Og Bedriftservice AS | Administrative & support | 1969 |
| Huset I Hagen AS | Wholesale & retail | 2016 |
| Håndverk Bygg AS | Construction | 2022 |