| Hadeland MC Og Fritid AS | Wholesale & retail | 2002 |
| Hadeland Multiservice AS | Wholesale & retail | 2020 |
| Hadeland Pulverlakk AS | Manufacturing | 2015 |
| Hapro AS | Information & communication | 1971 |
| Hapro Electronics AS | Manufacturing | 2017 |
| Hapro Inkludering AS | Health & social care | 2021 |
| Hapro Jobb Og Karriere AS | Health & social care | 2017 |
| Helgedalen Beitelag | Real estate | 1995 |
| HHS AS | Administrative & support | 2021 |
| Hidemgårdene AS | Real estate | 1983 |
| HMP Multiservice AS | Administrative & support | 2019 |
| Holbæk Eriksensgate 10 AS | Real estate | 2015 |
| Holmswiik Holding AS | | 2024 |
| Hvamstad Eiendom AS | Real estate | 2012 |
| Hvamstad Invest AS | Real estate | 2020 |
| Idata AS | Information & communication | 1988 |
| Jacobsen Eiendom AS | Real estate | 2007 |
| Jacobsen Holding AS | Real estate | 2007 |
| Jacobsen Maskin AS | Wholesale & retail | 1999 |
| Jahrmann Motorteknikk AS | Other services | 2009 |
| Jaren Center AS | Real estate | 1987 |
| Jaren Kafe AS | Hospitality | 2025 |
| Jaren Mat AS | Wholesale & retail | 1984 |
| Jaren Snekkerverksted AS | Manufacturing | 1998 |
| Jarenelementmontasje AS | Construction | 2025 |
| Jco Holding AS | Financial services | 2008 |
| Juul Eiendom AS | Wholesale & retail | 2005 |
| Juul Finans AS | Administrative & support | 2017 |
| Jørgensløkken Holding AS | Real estate | 2006 |
| Jørte AS | | 2020 |
| Kman Invest AS | Information & communication | 2021 |
| Landbruk Og Gjødselservice Hadeland Da | Agriculture & fishing | 2025 |
| Landbrukstransport AS | Transport & logistics | 2004 |
| Langedrag Eiendomsselskap AS | Real estate | 1992 |
| Lars Strøm AS | | 2023 |
| Larsen & Stensvold Eiendom AS | Real estate | 2024 |
| Lauvbro AS | Professional & scientific | 2016 |
| Lauvbro Consult AS | Professional & scientific | 2025 |
| Lauvlibakken Invest AS | | 2026 |
| Lavvoutleie.No | Administrative & support | 2001 |
| LGS Da | Construction | 2004 |
| Lifting Equipment AS | Professional & scientific | 1997 |
| Lok Gruppen AS | Real estate | 2021 |
| Lygna 2 Eiendom AS | Real estate | 2026 |
| Lygna Booking AS | Real estate | 2021 |
| Lygna Camp AS | Hospitality | 1996 |
| Lygna Hytteservice AS | Construction | 2018 |
| Lygnagrenda AS | Real estate | 2020 |
| Lygnalia Drift AS | Construction | 2015 |
| Lygnalia Grunneierlag SA | Real estate | 2006 |
| Lygnavegen Eiendom AS | Real estate | 2022 |
| M Haug & Sønn AS | Construction | 2004 |
| M Mathisen Holding AS | | 2021 |
| Martin Bekken Strøm AS | Construction | 2015 |
| MATHIS1 AS | | 2021 |
| Mathisen Lastebiltransport AS | Transport & logistics | 1998 |
| Maven Invest AS | Professional & scientific | 2021 |
| MCS Elektrotavler AS | Manufacturing | 2015 |
| Metall Team AS | Manufacturing | 2017 |
| Mfs-Services AS | Manufacturing | 2013 |
| Min Kompetanse AS | Information & communication | 2013 |
| Minel Ainstall AS | Construction | 2008 |
| Mohagalia Eiendom AS | Real estate | 2011 |
| Mohagasvingen 1 AS | Real estate | 2006 |
| Mohagen Bil AS | Wholesale & retail | 2024 |
| Mohagen Eiendom AS | Real estate | 2007 |
| Mojo Holding AS | Wholesale & retail | 2025 |
| Monsen Maskin & Transport AS | Construction | 2020 |
| Morstad Bil AS | Wholesale & retail | 2011 |
| MY1MIN Technologies AS | Information & communication | 2022 |
| Mathisen Eiendom a.s | Real estate | 1987 |
| Mælum Eiendom AS | Real estate | 2022 |
| Naturstein AS | Wholesale & retail | 2017 |
| Nifira AS | Professional & scientific | 2021 |
| Nilsen-Holding AS | Wholesale & retail | 2021 |
| Nybrøtte Eiendom AS | Real estate | 2021 |
| Nyseth Bilverksted AS | Other services | 2013 |
| Nyvent AS | Wholesale & retail | 2015 |
| O.M Transport AS | Transport & logistics | 2014 |
| Ola Hoff Entreprenør AS | Construction | 2000 |
| Orstadgutua Veglag SA | Real estate | 2007 |
| Oslo Bobilutleie AS | Administrative & support | 2020 |
| Oslo Sikkerhetsmakulering AS | Administrative & support | 2020 |
| P. Nygård AS | | 2023 |
| PCP Invest AS | | 2021 |
| Petrisen Holding AS | | 2021 |
| Prestkværn Næringspark AS | Real estate | 1969 |
| Pukk 1 Hadeland AS | Mining & quarrying | 2012 |
| Pulverlakk Østlandet AS | Manufacturing | 2026 |
| Radon AS | Professional & scientific | 2015 |
| Radonor AS | Professional & scientific | 2005 |
| Railway Insight AS | Professional & scientific | 2020 |
| Randsfjord Tømmer AS | Transport & logistics | 2006 |
| Randsfjordmuseet AS | Arts & recreation | 2004 |
| Raste 1 AS | Real estate | 2006 |
| Raste 2 AS | Real estate | 2012 |
| Rief Holding AS | | 2025 |
| Rognebakken 3 AS | Real estate | 2021 |
| Rudsflata 9 AS | Real estate | 2012 |
| Rune Kjensberg AS | Professional & scientific | 2018 |