| Has Holding AS | Construction | 2017 |
| Has Holding II AS | Construction | 2021 |
| Haugen Elektro AS | Construction | 2019 |
| Haugnæss Rør AS | Construction | 1970 |
| Haugnæss VVS AS | Construction | 2026 |
| Hegdal Holding AS | Mining & quarrying | 2018 |
| Heggberget Thrine Og Tor Ans | Agriculture & fishing | 1981 |
| Heimdal Bil AS | Wholesale & retail | 2021 |
| Heja Eiendom AS | Wholesale & retail | 2011 |
| Helge S Invest AS | Administrative & support | 2020 |
| Helliksen Eiendom AS | Real estate | 1974 |
| Henrik Øye Holding AS | | 2020 |
| Henryk Franciszek Puzuik Uslugi Budowlane | Construction | 2006 |
| Hera Advokat AS | Professional & scientific | 2020 |
| Hesi Invest AS | | 2014 |
| Hesymaja AS | | 2021 |
| Heto Fysioterapi AS | Health & social care | 2024 |
| Heviha Holding AS | | 2025 |
| Hfglobal AS | Wholesale & retail | 2020 |
| HH Utleie Da | Administrative & support | 2024 |
| Hindbjørgmo Portmontasje AS | Construction | 2021 |
| HMS - Senteret AS | Health & social care | 2010 |
| Hoffmeister AS | Wholesale & retail | 2019 |
| Hofstad 4 AS | Real estate | 2018 |
| Hofstad Næring AS | Construction | 2017 |
| Hofstad Næringspark Øst AS | Real estate | 2023 |
| Hofstad Utvikling 4 AS | Real estate | 1998 |
| Hofstadveien 42 AS | Real estate | 2018 |
| Holdbakk Rør AS | Construction | 2005 |
| Hollum Avløpsanlegg Da | Water & waste | 2001 |
| Hollum-Kregnes Utmarkslag SA | Real estate | 2017 |
| Holmverk AS | Professional & scientific | 2026 |
| HSF Holding AS | Financial services | 2017 |
| Humla Familiebarnehage AS | Education | 2023 |
| Huyrebel Holding AS | | 2026 |
| Hverdagsråd AS | Professional & scientific | 2015 |
| Hårstad Eiendom AS | Construction | 2017 |
| Hårstad Entreprenør AS | Construction | 2017 |
| Høieggen Gård AS | Real estate | 2023 |
| Hølondvegen 3122 AS | Real estate | 2019 |
| Høyeggen 58 AS | Real estate | 2021 |
| Idecon Eiendom AS | Professional & scientific | 2007 |
| Imjonesaune AS | | 2020 |
| Inheo Invest AS | | 2023 |
| Inner Castle Music AS | Arts & recreation | 2003 |
| Innoflora AS | Wholesale & retail | 2024 |
| Integrix Holding AS | | 2026 |
| Interact AS | Professional & scientific | 2000 |
| Invia Vekst AS | Education | 2016 |
| Iro AS | | 2023 |
| ISE7 AS | Professional & scientific | 2021 |
| J. M. Solberg Holding AS | Real estate | 2013 |
| J.O.G. Holding AS | Construction | 2006 |
| JBP Prosjekt AS | Construction | 2024 |
| JBP Transport AS | Transport & logistics | 2024 |
| Jensen Prestmo Products Ans | | 1988 |
| Jernbanepartner AS | Professional & scientific | 2022 |
| Jernbetong AS | Construction | 1999 |
| Jobb & Inkludering AS | Transport & logistics | 2021 |
| Jocla Enterprises AS | Wholesale & retail | 2003 |
| Jomar Grøtan AS | | 2008 |
| Jordbærpikene Melhus AS | Hospitality | 2006 |
| Jpj-Råd AS | Professional & scientific | 2024 |
| Jsa Group Holding AS | | 2025 |
| Julie Nilsen AS | Financial services | 2015 |
| K a Berg AS | Financial services | 2016 |
| K&K Renhold AS | Administrative & support | 2017 |
| K&S Style AS | Wholesale & retail | 2016 |
| K. Storås Holding AS | | 2025 |
| K.Moe Holding AS | | 2020 |
| K9 Hundesenter AS | Other services | 2019 |
| Karivollvegen 106 AS | Real estate | 2018 |
| Karja AS | Real estate | 2005 |
| Keiserås Entreprenør AS | Construction | 2018 |
| Keiserås Holding AS | Agriculture & fishing | 2023 |
| Khaugen Invest AS | Real estate | 2021 |
| Khawgeng Thai AS | Hospitality | 2020 |
| Kirkegata 3A AS | Real estate | 2013 |
| Kjelsberg Holding AS | Real estate | 2020 |
| Kjelsberg Transport AS | Transport & logistics | 2020 |
| Kleists Gate 9 AS | Real estate | 2022 |
| Kleiven Drift AS | Construction | 2026 |
| Kleiven Holding AS | | 2026 |
| Klinikk Angel AS | Health & social care | 2020 |
| KM Rør AS | Construction | 2026 |
| Knausebu Holding AS | | 2017 |
| Knut Bugge Kran Og Transport AS | Transport & logistics | 2010 |
| Knut Eidsmo Holding AS | Manufacturing | 2005 |
| Kolibri Invest AS | Administrative & support | 2021 |
| KP Holding AS | Other services | 2019 |
| Kristian Ekren AS | | 2016 |
| Kristian Lorvik AS | Wholesale & retail | 2009 |
| Kroken Eiendom AS | Real estate | 2025 |
| Krysset Hårstudio AS | Other services | 1998 |
| Krysset Hårstudio Rita Bakken Og Hege Bjerkaker Da | Other services | 1993 |
| Krøll Holding AS | Real estate | 2016 |
| Ksbl Holding AS | | 2019 |
| Kvammen Invest AS | Construction | 2014 |
| Lanesra Holding AS | | 2022 |
| Langørgen AS | Construction | 2013 |