| Follohus Gruppen AS | Construction | 2017 |
| Fordringer AS | Professional & scientific | 2005 |
| Fortis Invest AS | Real estate | 2014 |
| Fossil Invest AS | | 2018 |
| Fossum Eiendomsselskap AS | Real estate | 1999 |
| Foxen AS | | 2023 |
| Fram Education AS | Administrative & support | 2016 |
| Fredensberg AS | | 2018 |
| Frida Ronge Food & Consulting AS | Other services | 2025 |
| Frigoscandia Transport AS | Transport & logistics | 2020 |
| Frisk Bygg Og Eiendom AS | Construction | 2021 |
| Friske Føtter AS | Health & social care | 2016 |
| Frode Bjerkholt AS | Information & communication | 2011 |
| G & G Servering AS | Hospitality | 2020 |
| G Lind Eiendom AS | Real estate | 2021 |
| Ganesar Eiendom AS | Real estate | 2012 |
| Gazoline Automobilbyrå AS | Administrative & support | 1998 |
| Geir Sundal AS | Construction | 2026 |
| Gill AS | Wholesale & retail | 2000 |
| Gjør Det Da | Administrative & support | 2021 |
| Globale Sikkerhetstjenester Ans | Wholesale & retail | 2005 |
| Globo AS | Real estate | 2021 |
| Glow Naturals AS | Wholesale & retail | 2024 |
| Grave Og Riveteknikk AS | Construction | 2011 |
| Great Leap AS | Professional & scientific | 2016 |
| Greenway Agency AS | Real estate | 2018 |
| Grimlid Og Bøhler Byggmontering Ans | Wholesale & retail | 2000 |
| GT Investment AS | Hospitality | 2019 |
| Gungun Holding AS | Health & social care | 2024 |
| Gunvor Og Albert Invest AS | Financial services | 2014 |
| Gustavsen Bygg Og Prosjektledelse AS | Construction | 2013 |
| H & B Educational Consult AS | Professional & scientific | 2018 |
| Habeo Management AS | | 1996 |
| Habotai AS | Information & communication | 2023 |
| Hada Forvaltning AS | Professional & scientific | 2016 |
| Hadeland Ventilasjon Og Montasje AS | Construction | 2013 |
| Hallin AS | Construction | 2017 |
| Hans Martin Karlsen Eiendom AS | Real estate | 1994 |
| Hansen Invest AS | Information & communication | 2018 |
| Haugenveien 1 AS | Construction | 2011 |
| Haugenveien 35 AS | Real estate | 2009 |
| Hbekk Invest AS | | 2026 |
| Heimdal & Fehr AS | Construction | 2021 |
| Hekka AS | Manufacturing | 2017 |
| Hel Hverdagshelse AS | Health & social care | 2024 |
| Herlig Burger AS | Hospitality | 2026 |
| Hesteveterinær Tonje I. Frostrud AS | Professional & scientific | 2026 |
| Hibiscus AS | Professional & scientific | 2020 |
| Hjeravegen 82 AS | Real estate | 2018 |
| HJK Investment AS | Financial services | 2017 |
| Hjulet AS | Real estate | 2000 |
| Hjulet Eiendom AS | Real estate | 1978 |
| HMK Eiendom Holding AS | | 2026 |
| Hollyfood AS | Health & social care | 2026 |
| Holst Foods AS | Wholesale & retail | 2000 |
| Hope Hair Vinterbro AS | Other services | 2017 |
| Horadric Cube AS | | 2025 |
| Horze Norge AS | Wholesale & retail | 1990 |
| HPG Drift AS | Real estate | 2023 |
| HSN Consulting AS | Professional & scientific | 2015 |
| Hunskår Og Agnor Da | Hospitality | 1994 |
| Hus Og Bolig AS | Real estate | 2025 |
| Hyper AS | Wholesale & retail | 2012 |
| Håholm Invest AS | | 2020 |
| Hånde Energy AS | Professional & scientific | 2003 |
| Håndverksveien 3 AS | Real estate | 2014 |
| Høek Holding AS | Wholesale & retail | 2025 |
| Høst Invest AS | Construction | 2014 |
| Høy AS | Professional & scientific | 2026 |
| Ibab Investment AS | | 2021 |
| Iconic Beauty AS | Other services | 2015 |
| Iiiixi AS | Information & communication | 2020 |
| Ikveld Ans | Wholesale & retail | 2010 |
| Ilma Regnskap AS | Professional & scientific | 2022 |
| Income Holding AS | Real estate | 2020 |
| Infolog AS | Information & communication | 1985 |
| Infraflyt AS | Information & communication | 2014 |
| Inizia Consulting AS | Professional & scientific | 2022 |
| Institutt for Systemoppstilling AS | Education | 2012 |
| Intec Pumper AS | Wholesale & retail | 1990 |
| Interiørservice Selstad AS | Construction | 1996 |
| Interpunkt AS | | 2025 |
| Intro Flyttebyrå Oslo AS | Transport & logistics | 2002 |
| IT Invest AS | Professional & scientific | 1996 |
| IT Teknikk AS | Information & communication | 2007 |
| Itc AS | Health & social care | 2021 |
| J.V Ravenborg AS | Real estate | 2026 |
| Jakobcompany AS | Professional & scientific | 2000 |
| Jamre AS | Wholesale & retail | 2015 |
| Janh Invest AS | Real estate | 2015 |
| Japply AS | Information & communication | 2025 |
| Jaw Capital AS | | 2026 |
| Jernia AS | Wholesale & retail | 1951 |
| Jernia Detalj AS | Wholesale & retail | 1995 |
| JL Datter AS | Professional & scientific | 2016 |
| Jlenk AS | | 2021 |
| Jo Regnskap AS | Professional & scientific | 2024 |
| Jomfrulunden AS | Real estate | 2022 |
| Jondal Invest AS | | 2024 |
| Jordbærpikene Vinterbro AS | Hospitality | 2012 |