| Frøysnes Eigedom AS | Information & communication | 2005 |
| Fyrverkeri AS | Wholesale & retail | 2021 |
| Fysiorelax AS | Health & social care | 2012 |
| Fysioterapeut Oda Sodefjed Tørnkvist AS | Health & social care | 2026 |
| Førerutvikling Sør AS | Education | 2021 |
| G.D.A AS | Administrative & support | 2020 |
| Garage Gym AS | Arts & recreation | 2020 |
| Gautestad Invest AS | Financial services | 2015 |
| GE9 Invest AS | | 2007 |
| Gegga Holding AS | | 2018 |
| Generate Group AS | Information & communication | 2023 |
| Gisna Gold AS | Mining & quarrying | 2022 |
| Gladkjøkkenet AS | Hospitality | 2015 |
| Gledefabrikken AS | Wholesale & retail | 2024 |
| Glimrende Holding AS | | 2024 |
| GLJ Holding AS | Administrative & support | 2008 |
| Globe Invest AS | Professional & scientific | 2005 |
| GLT Invest AS | Administrative & support | 2012 |
| GM Jortveit AS | | 2023 |
| God Driv AS | Real estate | 1989 |
| Got Equipment AS | Manufacturing | 2010 |
| Gotti Gatekjøkken AS | Hospitality | 2020 |
| Graf Design Studio AS | Professional & scientific | 2018 |
| Granlibakken AS | Real estate | 2005 |
| Granmeisvegen 5 AS | Real estate | 2025 |
| Graslia Park AS | Real estate | 2019 |
| Gravane AS | Arts & recreation | 2016 |
| Green Carnation AS | Arts & recreation | 2019 |
| Grefstad Varehandel AS | Wholesale & retail | 2024 |
| Grete's Salong AS | Other services | 2015 |
| Grovane Eiendom AS | Real estate | 1918 |
| GT Maskinering AS | Manufacturing | 2016 |
| H. Q. Eiendom AS | Financial services | 2005 |
| Hagen Og Tveit Karosseri AS | Other services | 2020 |
| Hansen Og Jepsen AS | Construction | 2007 |
| Hansen Og Rosaas AS | Construction | 2026 |
| Happy People AS | Professional & scientific | 2009 |
| Harestua Barnehage AS | Education | 2008 |
| Haugland VVS AS | Construction | 1998 |
| Hawk Horsemanship AS | Education | 2023 |
| Hege Skeie AS | Other services | 2026 |
| Heisel Bygg AS | Construction | 2013 |
| Heisel Transport AS | Transport & logistics | 1991 |
| Helms Svandal AS | Health & social care | 2017 |
| Henbo AS | | 2021 |
| Henning Hansen Regnskap AS | Professional & scientific | 2012 |
| Heptekjerrvegen 37 AS | Wholesale & retail | 2020 |
| Hestvåg AS | Real estate | 2006 |
| Hightech Herding AS | Professional & scientific | 2022 |
| Hildebrandt Holding AS | | 2024 |
| Hirday Ram AS | Hospitality | 2024 |
| Hisa Holding AS | Information & communication | 2013 |
| Hjerterom Kaffe & Te AS | Hospitality | 2015 |
| Hjørnesteinen Eiendom AS | Real estate | 2021 |
| HKB Invest AS | Construction | 2008 |
| HNV AS | Hospitality | 2022 |
| HNV II AS | Hospitality | 2022 |
| Holbæk Holding AS | Construction | 2005 |
| Holbæk Næringsutvikling AS | Water & waste | 2011 |
| Holbæk Rør AS | Construction | 2016 |
| Holbæk Utleie AS | Real estate | 2020 |
| Holde AS | Professional & scientific | 2014 |
| Honnemyr Betongsaging AS | Construction | 2024 |
| Honnemyr Maskin AS | Administrative & support | 2021 |
| Hotno AS | Financial services | 2005 |
| Hovden 1 AS | Real estate | 2016 |
| Hovden Fjellstoge Hotellbygg AS | Real estate | 2016 |
| Hovden Fjellstoge Utvikling AS | Real estate | 2016 |
| Huba Supply AS | Administrative & support | 2013 |
| Hunsfos Arena X AS | Arts & recreation | 2026 |
| Hunsfos Autoverksted AS | Other services | 2019 |
| Hunsfos Bryggeri AS | Manufacturing | 2013 |
| Hunsfos HMS AS | Health & social care | 2020 |
| Hunsfos Invest AS | Real estate | 2018 |
| Hunsfos Næringspark AS | Real estate | 2012 |
| Hunsfos Næringspark Holding AS | | 2026 |
| Hunsfos Opplevelse AS | Administrative & support | 2015 |
| Hunsfos Panorama AS | Real estate | 2025 |
| Hunsøya Tannhelsesenter AS | Health & social care | 2023 |
| Hunsøya Utvikling AS | Real estate | 2022 |
| Huntonit AS | Manufacturing | 1971 |
| Huntonit Eiendom AS | Real estate | 2021 |
| Husøy Bygg AS | Construction | 2016 |
| Hydro Vigelands Brug AS | Manufacturing | 2016 |
| Hydroflux Energy AS | Professional & scientific | 2026 |
| Håkon Simonsen Og Knut Frøysaa Hageservice Ans | Administrative & support | 1998 |
| Håkon Simonsen Utleie AS | Administrative & support | 2011 |
| Høiåsen Invest AS | Financial services | 2015 |
| Høyåsen Service AS | Manufacturing | 2024 |
| Iar Holding AS | Wholesale & retail | 2024 |
| Ida's Catering AS | Hospitality | 2026 |
| Inform Frisørsalong AS | Other services | 1997 |
| Ingen Driv AS | Financial services | 2007 |
| IP Transport AS | Transport & logistics | 2024 |
| IT Partner Sør AS | Information & communication | 2005 |
| Jakobsen Bygg & Anlegg AS | Construction | 2025 |
| Jano Invest AS | | 2024 |
| JDL Capital AS | | 2026 |
| Jens Kvarstein AS | Real estate | 2025 |
| Jensen Gruppen AS | Professional & scientific | 2006 |