| Gf-Prosjekt AS | Professional & scientific | 2004 |
| GH Bemanning Og Rekruttering AS | Administrative & support | 2014 |
| Gjørud Færden Da | Agriculture & fishing | 2017 |
| Glba Holding AS | | 2024 |
| Granåsen Consulting AS | Professional & scientific | 2002 |
| Grønn Bee AS | Construction | 2015 |
| GS Seat AS | Manufacturing | 2009 |
| Gårder Prosjekt AS | Professional & scientific | 2021 |
| Hadeland -Takentreprenør AS | Construction | 2021 |
| Hadeland Andelslandbruk SA | Wholesale & retail | 2016 |
| Hadeland Catering AS | Hospitality | 2021 |
| Hadeland Drift AS | Hospitality | 2021 |
| Hadeland Glassverk Kunst & Kulturformidling AS | Professional & scientific | 2018 |
| Hadeland Og Ringerike Avfallsselskap AS | Water & waste | 1992 |
| Hadeland Og Ringerike Bioraffineri AS | Energy | 2025 |
| Hadeland Viltslakteri AS | Manufacturing | 2020 |
| Hadelandsnett AS | Information & communication | 2019 |
| Hafu AS | Professional & scientific | 2005 |
| Hagens Renhold Og Vedlikehold AS | Administrative & support | 2017 |
| Hakkespetten Invest AS | | 2022 |
| Hanif Barnefaglig Psykologi AS | Health & social care | 2010 |
| Haugen Jevnaker AS | Real estate | 2011 |
| Havi Eiendom AS | Real estate | 2020 |
| Havi Holding AS | Manufacturing | 2020 |
| HBB Consult AS | Information & communication | 2023 |
| Heggeli Graveservice AS | Construction | 2024 |
| Honerudseterveien SA | Real estate | 1961 |
| Honrin AS | Hospitality | 2017 |
| HRB Hjelpeselskap AS | Energy | 2025 |
| Hverven Invest AS | Professional & scientific | 2005 |
| Hydrema Norge AS | Wholesale & retail | 1974 |
| Hypetrade AS | Information & communication | 2021 |
| Hytteplan AS | Construction | 2012 |
| Hølen Invest AS | | 2023 |
| Ideo Utvikling AS | Information & communication | 2005 |
| Industriservice Ing Yngve Midtfjell AS | Wholesale & retail | 1999 |
| Ing. Jan Erik Gauksrud AS | Professional & scientific | 2012 |
| Inneiendomsinvest AS | Real estate | 2015 |
| Jafs Jevnaker AS | Hospitality | 2013 |
| Jensen Rørservice AS | Construction | 2019 |
| Jevnaker Agentur Limited Nuf | Wholesale & retail | 2007 |
| Jevnaker Auto Senter AS | Real estate | 1989 |
| Jevnaker Bil Og Karosseri AS | Other services | 2008 |
| Jevnaker Bilverksted AS | Other services | 2005 |
| Jevnaker Bilverksted Eiendom AS | Real estate | 2005 |
| Jevnaker Center AS | Real estate | 2005 |
| Jevnaker Dagligvare AS | Wholesale & retail | 2025 |
| Jevnaker Elektriske Forretning AS | Construction | 1987 |
| Jevnaker Fysikalske Institutt Da | Health & social care | 1976 |
| Jevnaker Grunneierlag | Real estate | 1970 |
| Jevnaker I F Fotball Budbiler Da | Transport & logistics | 2002 |
| Jevnaker Legegruppe AS | Health & social care | 2026 |
| Jevnaker Legegruppe Da | Health & social care | 2004 |
| Jevnaker Malerservice AS | Construction | 2022 |
| Jevnaker Smil Tannklinikk AS | Health & social care | 2022 |
| Jevnaker Taxi SA | Transport & logistics | 2004 |
| JKG Holding AS | Financial services | 2015 |
| Jore Invest AS | | 2005 |
| Jan F Andersen AS | Wholesale & retail | 1987 |
| Ka Transmek AS | Transport & logistics | 2012 |
| Ka-Ha AS | Real estate | 2022 |
| Karigg.Transport. AS | Transport & logistics | 2025 |
| Karmøy Eiendom AS | Real estate | 1991 |
| Kaselo AS | Professional & scientific | 2023 |
| Kbi Financial Management AS | Professional & scientific | 2015 |
| Ke Magnussen Invest AS | Information & communication | 2008 |
| Kem Invest AS | Real estate | 2005 |
| Key Web Design Ans | Information & communication | 2022 |
| Kjell's Selskapsmat Da | Hospitality | 1998 |
| Klar Kurs AS | Education | 2004 |
| Klinkenberg Holding AS | Construction | 2019 |
| Koem AS | Construction | 2019 |
| Koren & Co AS | | 1999 |
| Kpinvest AS | Financial services | 2017 |
| Krabset Invest AS | | 2025 |
| Krøkje Eiendom AS | Real estate | 2020 |
| Krøkje Holding AS | Real estate | 2020 |
| Kunstpause AS | Hospitality | 2025 |
| Lamme AS | Administrative & support | 2022 |
| Lastebil Eksport AS | Wholesale & retail | 2020 |
| Lauvaas AS | | 2024 |
| Level Helse Og Coaching Da | Health & social care | 2014 |
| Lige Holding AS | Real estate | 2005 |
| Lintex AS | Manufacturing | 1973 |
| Lokus Invest AS | Real estate | 2021 |
| Lst-Holding AS | Wholesale & retail | 2020 |
| Luddikom AS | Professional & scientific | 2025 |
| M P Eiendom AS | Real estate | 1987 |
| M. Carlsen & Sønn Jevnaker AS | Construction | 2009 |
| M. Kleven Invest AS | | 2020 |
| M. Korgerud AS | | 2023 |
| Mahe AS | | 2021 |
| Male Holding AS | | 2021 |
| Malermester Viken AS | Construction | 2023 |
| Management Consulting AS | Information & communication | 2012 |
| MB Auto Invest AS | Wholesale & retail | 2024 |
| Mdub Invest AS | Real estate | 2023 |
| Mehlum Butikkdata AS | Wholesale & retail | 2014 |
| Melba Profil Da | Wholesale & retail | 2001 |
| Mesmo AS | Professional & scientific | 2012 |