| Fjell Digital AS | Information & communication | 2008 |
| Fjellfrisk AS | | 2022 |
| Flatland Multiservice AS | Transport & logistics | 2021 |
| Fleming Industrier AS | Professional & scientific | 2012 |
| Flexi Renhold Og Anleggsgartner AS | Administrative & support | 2021 |
| Flis Og Murmester AS | Construction | 2014 |
| Flugonfjell Hytteutvikling AS | Real estate | 2010 |
| FLX Audio AS | Administrative & support | 2020 |
| Flying Sales AS | Administrative & support | 2013 |
| Flyland Holding AS | Real estate | 2020 |
| Flyteknisk Notodden AS | Manufacturing | 1987 |
| Flåterud Eiendom Da | Real estate | 1999 |
| Flåtin Bil Og Maskin AS | Transport & logistics | 2018 |
| Folkedraktsaum AS | Education | 2024 |
| Foma Consulting AS | Wholesale & retail | 2015 |
| Form Gym AS | Arts & recreation | 2025 |
| Formac Tele Trading AS | Manufacturing | 1995 |
| Forvaltningsenteret AS | Information & communication | 2002 |
| Fossheim Småbruk AS | Agriculture & fishing | 2019 |
| Frontéri Arsenal AS | Professional & scientific | 2026 |
| Fryd Hårstudio AS | Other services | 2021 |
| Frømyr Invest AS | Real estate | 2012 |
| Fs-Eiendomsdrift AS | Real estate | 2023 |
| FTS Holding AS | Real estate | 2018 |
| G.T Nordics AS | Manufacturing | 2019 |
| Ga Maskin AS | Construction | 2025 |
| Garberg Produktutvikling AS | Information & communication | 1995 |
| Gatebar AS | Hospitality | 2020 |
| Gavlesjåvegen SA | Real estate | 1979 |
| Generoc AS | Professional & scientific | 2021 |
| Geo Go AS | Information & communication | 2025 |
| Geophysix AS | Professional & scientific | 1989 |
| GHG Consulting AS | Real estate | 2019 |
| Gih Invest AS | | 2005 |
| Gika Eiendom AS | Wholesale & retail | 1989 |
| Gika Holding AS | Wholesale & retail | 2005 |
| Gjestrud AS | | 2015 |
| Gnisten Eiendom AS | Real estate | 2023 |
| Go Link AS | Information & communication | 2000 |
| Grammofon AS | Information & communication | 1995 |
| Grenland Transport AS | Transport & logistics | 1997 |
| Grindalen Service AS | Construction | 2012 |
| Grønbygelstul Skogsameige Ans | Real estate | 2008 |
| Grønkjær Skisenter SA | Arts & recreation | 1988 |
| Gt-Bygg AS | Construction | 2010 |
| Gullbring Transport Ans | Transport & logistics | 1997 |
| Gullheim Holding AS | Mining & quarrying | 2021 |
| Gulvdeal AS | Wholesale & retail | 2010 |
| Gulvdeal Extra AS | Wholesale & retail | 1960 |
| Gumpens Auto Notodden AS | Other services | 1996 |
| H & B Eiendom Da | Real estate | 2004 |
| H. Tandberg AS | Administrative & support | 2020 |
| H2O Solutions AS | Professional & scientific | 2021 |
| Haave Graveservice AS | Construction | 2018 |
| Haave Holding AS | | 2022 |
| Haave Skog AS | Agriculture & fishing | 2017 |
| Habø Eiendom AS | Real estate | 2015 |
| Haddeland Verksteddrift AS | Professional & scientific | 2016 |
| Hagemagi AS | Agriculture & fishing | 2020 |
| Hairsisters AS | | 2020 |
| Hamid Sepahvand AS | Health & social care | 1997 |
| Handelscompagniet Peer Gynt AS | Wholesale & retail | 2003 |
| Hardang Heia Eiendom AS | Real estate | 2010 |
| Hatool AS | Manufacturing | 2020 |
| Haugerud Regnskapskontor AS | Professional & scientific | 2024 |
| Hauklien Holding AS | | 2026 |
| Healthy Nisse AS | Wholesale & retail | 2026 |
| Hed Holding AS | Real estate | 2016 |
| Heddal Bensinstasjon AS | Wholesale & retail | 2003 |
| Heddal Bildeler AS | Wholesale & retail | 1993 |
| Heddal Brønnboring AS | Construction | 2016 |
| Heddal Dyregård AS | Agriculture & fishing | 2026 |
| Heddal Eiendom AS | Real estate | 2005 |
| Heddal Hytter Ans | Manufacturing | 2002 |
| Heddal Maskin AS | Agriculture & fishing | 2020 |
| Heddal Private Barneskole SA | Education | 2025 |
| Heddal Private Ungdomsskole SA | Education | 2025 |
| Heddal Samdrift Da | Agriculture & fishing | 2005 |
| Heddalsvegen 24 AS | Real estate | 2025 |
| Heddalsvegen 24 Drift AS | Real estate | 2018 |
| Heddalsvegen 24 Holding AS | Real estate | 2025 |
| Heddalsvegen 32 Ans | Real estate | 1997 |
| Heddalsvegen 44 AS | Real estate | 2025 |
| Heddalsveien 37 AS | Real estate | 2007 |
| Heddalsveien 44 AS | Real estate | 1999 |
| Heddalsveien 53 AS | Real estate | 2017 |
| Heddalsveien 878 AS | Real estate | 2002 |
| Heddøla Elveeierlag SA | Real estate | 1988 |
| Hefre Skogsdrift AS | Agriculture & fishing | 2015 |
| Hefregården AS | Real estate | 2007 |
| Hegna Grustak AS | Mining & quarrying | 2020 |
| Hegna Maskinservice AS | Construction | 1991 |
| Hegne Invest AS | | 2023 |
| Heia AS | Construction | 1994 |
| Heland Holding AS | | 2024 |
| Helgesen Maskinering AS | Manufacturing | 1999 |
| Hendana AS | Health & social care | 2026 |
| Herkules Gummi Eiendom AS | Real estate | 2008 |
| Herligheten Isbar AS | Hospitality | 2022 |
| High Impact Trailers AS | Information & communication | 2018 |