| HRC Group AS | Wholesale & retail | 2007 |
| HSL B12 AS | Real estate | 2019 |
| HSL B20 AS | Real estate | 2019 |
| HT Consulting AS | Information & communication | 2005 |
| Huseby Maskin AS | Construction | 2007 |
| Hvittingfossveien 151 AS | Real estate | 2019 |
| Håkonsen Og Sukke Landskapsentreprenør AS | Administrative & support | 2012 |
| Håvard B. Olsen Holding AS | Real estate | 2015 |
| Høibach Bygg AS | Construction | 2026 |
| Høibach Eiendom AS | Real estate | 2025 |
| Høisæt Invest AS | Financial services | 2005 |
| Hønsvall Hontvedt Holding AS | Professional & scientific | 2025 |
| Høydepartner AS | Agriculture & fishing | 2026 |
| I. Rasmussen Bygg AS | Construction | 2019 |
| Iac Vestcold AS | Construction | 1997 |
| Idas Verden AS | Wholesale & retail | 2005 |
| Identety AS | Professional & scientific | 2016 |
| Inforte AS | Information & communication | 2007 |
| Ingenting Personlig AS | Information & communication | 2026 |
| Ink on AS | Professional & scientific | 2017 |
| Innkjøpsgruppen Vestfold AS | Administrative & support | 1997 |
| Innlaget Eiendom AS | | 1989 |
| Innlandet Invest AS | | 2022 |
| Interflon Nor AS | Wholesale & retail | 1996 |
| It-Eiendom AS | | 1981 |
| Itide AS | Transport & logistics | 2017 |
| Itx Norge AS | Information & communication | 2012 |
| J R T AS | Construction | 2007 |
| Jacmar AS | Wholesale & retail | 1986 |
| Janka AS | Financial services | 2014 |
| Janton AS | Manufacturing | 2005 |
| Jarlsberg Eiendom AS | Real estate | 2004 |
| Jarlsberg Yrkesklær AS | Wholesale & retail | 2014 |
| Jatronic AS | Manufacturing | 1990 |
| JC Renhold AS | Administrative & support | 2026 |
| JDH Holding AS | | 2022 |
| Jener Maskinering AS | Manufacturing | 2017 |
| JG Snekkeren AS | Construction | 2013 |
| JGH Invest AS | Real estate | 2005 |
| JNM Holding AS | | 2022 |
| Jobbute.No AS | Professional & scientific | 2020 |
| Johnsen and Partner Corp. AS | Financial services | 2009 |
| JP Aarseth Transport AS | Transport & logistics | 2015 |
| Juberg Digital AS | Professional & scientific | 2026 |
| Kai Archer AS | | 2024 |
| Kamilåså AS | | 2023 |
| Karl Inge Sandtrøen AS | Construction | 2013 |
| Karlsson & Dahl's Rør & Plateindustri AS | Manufacturing | 2013 |
| Karlstrøm Invest AS | Professional & scientific | 2019 |
| Kavedvik AS | Professional & scientific | 2025 |
| Keber AS | Information & communication | 2018 |
| Keber Invest AS | Real estate | 2012 |
| Kento AS | Real estate | 2017 |
| Kiga AS | | 2025 |
| Kihle Eiendom AS | Construction | 2013 |
| Kihlegård AS | Agriculture & fishing | 2009 |
| Kilen Brygge Drift AS | Administrative & support | 2008 |
| Killingmo AS | Other services | 2014 |
| Kimg Holding AS | | 2024 |
| Kin Kin AS | Hospitality | 2020 |
| Kjolz Legacy AS | | 2025 |
| Kjos Eiendom Og Invest AS | Real estate | 2006 |
| Kjær Potetpakkeri Ans | Wholesale & retail | 1994 |
| Kjærlighetsstien Næringsbygg AS | Real estate | 2016 |
| Kjønnerød Montasje AS | Construction | 2005 |
| Kleppan Holding AS | | 2019 |
| Klevstad Partners AS | Real estate | 2018 |
| Kløpper'N Frisørsenter Da | Other services | 1995 |
| Kme One AS | | 2026 |
| KMT Capital AS | | 2026 |
| Kobber Og Blikk Service AS | Construction | 2013 |
| Krifon AS | Wholesale & retail | 1998 |
| Kristian Remi Tveitan AS | Construction | 2014 |
| Kristiansen Blikk Og Vedlikehold AS | Construction | 2023 |
| Krizoo AS | Wholesale & retail | 1989 |
| Krokusveien Eiendom AS | Real estate | 2017 |
| Kronborg Eiendom AS | Real estate | 2022 |
| Kundelab AS | Information & communication | 2021 |
| L Røisgårds AS | Transport & logistics | 1998 |
| La Konsulentbyrå AS | Professional & scientific | 2024 |
| Laksesvela Holding AS | Real estate | 2018 |
| Lars Gundersen Eiendom AS | Real estate | 1996 |
| Lastmile AS | Transport & logistics | 2024 |
| Lavendel Studio AS | Other services | 2022 |
| Ledpro AS | Wholesale & retail | 2013 |
| Legacy Quest Europe | Administrative & support | 2005 |
| Letting AS | Real estate | 2021 |
| Leverance AS | Transport & logistics | 2019 |
| Lightgroupnordic AS | Wholesale & retail | 2013 |
| Lillevahr Finans AS | Real estate | 1999 |
| Lillevahrskogen 28 AS | Manufacturing | 2011 |
| Lillevarskogen 13 AS | Real estate | 2013 |
| Lillevarskogen 4 AS | Real estate | 2017 |
| Lillevarskogen 5 AS | Real estate | 1994 |
| Livorno Pizza Og Grill AS | Hospitality | 2024 |
| Logistikk Assist AS | Financial services | 2011 |
| LSS Holding AS | | 2019 |
| Lågen Tømmertransport AS | Agriculture & fishing | 2005 |
| M Marcussen Eftf AS | Manufacturing | 2012 |
| M-Transport AS | Transport & logistics | 2019 |