| Hellebæk Hagen C AS | Real estate | 2021 |
| Hellebæk Hagen D AS | Real estate | 2021 |
| Hellingsrud Consulting AS | Professional & scientific | 2023 |
| Helsekosten Kongsberg AS | Wholesale & retail | 2004 |
| Hem Eiendom AS | Real estate | 1996 |
| Hem Invest AS | | 2005 |
| Hengsle AS | Real estate | 2018 |
| Henrik Holtan AS | | 2022 |
| Hephaestus Da | Information & communication | 2008 |
| Hev Nivået AS | Arts & recreation | 2016 |
| Hilde Groven AS | Health & social care | 2021 |
| Hjortland Invest AS | | 2026 |
| Hkbn 3-4 AS | Real estate | 2020 |
| Hkbn 3-5 AS | Real estate | 2020 |
| Hkbn 3-6 AS | Real estate | 2020 |
| Hkbn 4-2 AS | Real estate | 2020 |
| Hkbn 4-3 AS | Real estate | 2020 |
| HKV Joint Venture | Wholesale & retail | 1995 |
| Hma Invest AS | | 2022 |
| Hobo Film AS | Information & communication | 2025 |
| Hoff Bilpleiesenter AS | Other services | 2022 |
| Hoffs Productions AS | Information & communication | 2025 |
| Hognestad Holding AS | Real estate | 2005 |
| Hogstad Consulting AS | Professional & scientific | 2017 |
| Holding Baaco AS | | 2018 |
| Holmen Industrieiendom AS | Real estate | 2021 |
| Holmer Invest AS | | 2023 |
| Holmko Bygg AS | Construction | 2025 |
| Homelien Eiendom AS | Real estate | 2000 |
| Homelien Holding AS | Real estate | 2021 |
| Honerud & Honerud AS | Arts & recreation | 2013 |
| HORIZONTE2TRAVEL AS | Transport & logistics | 2012 |
| Hostvedt Holding AS | Real estate | 2005 |
| Hotell Norge AS | Real estate | 1986 |
| Hotvedt AS | | 2025 |
| Hovdeplassen Barnehage AS | Education | 2023 |
| Hove Invest AS | | 1988 |
| HS News Eiendom AS | Real estate | 2020 |
| HS News Holding AS | Information & communication | 2021 |
| HS News Systems AS | Information & communication | 1995 |
| HSB Consulting AS | | 2020 |
| HSK Invest AS | Real estate | 2005 |
| Hså Holding AS | | 2021 |
| Hti Teknisk Isolasjon AS | Construction | 2015 |
| HTW Holding AS | Real estate | 2009 |
| Huldra Forlag Ans | Information & communication | 2007 |
| Hvamb Holding AS | Professional & scientific | 2019 |
| Hvammen Eiendom AS | Real estate | 2005 |
| Hvammen Holding AS | Real estate | 2005 |
| Hvila Capital AS | | 2026 |
| Hyttekompaniet Hyko AS | Real estate | 2021 |
| Håkon Berggren Holding AS | | 2025 |
| Hår Design Frisør AS | Other services | 2014 |
| Hårakutten AS | Other services | 2017 |
| Hårstua Kongsberg AS | Other services | 2009 |
| Håvardsrud Holding AS | Professional & scientific | 2016 |
| Håvardsrud Sag Og Høvleri AS | Manufacturing | 1989 |
| I Senteret AS | Manufacturing | 2011 |
| I Tide Eiendom AS | Construction | 2014 |
| Icbrg AS | Professional & scientific | 2023 |
| ICU2 Nuf | Health & social care | 2011 |
| Idab Invest AS | Real estate | 2016 |
| Ihlen Holding AS | | 2022 |
| Imago Group AS | Real estate | 2000 |
| Imago Invest AS | Other services | 2005 |
| Imbek AS | Wholesale & retail | 2017 |
| Imedical AS | Wholesale & retail | 2025 |
| Imingen Elektro AS | | 2024 |
| Industriell Dokumentasjon AS | Professional & scientific | 2017 |
| Industritunet AS | Real estate | 2021 |
| Industriveien Kongsberg AS | Real estate | 2017 |
| Inforvision Aps | Professional & scientific | 2007 |
| Ing. Heieren AS | Professional & scientific | 2008 |
| Ing. Henrik Fretheim AS | Professional & scientific | 2024 |
| Inger Eiendom AS | Financial services | 2017 |
| Inneklima 1 AS | Construction | 2023 |
| Insofern AS | Real estate | 2015 |
| Intersport Kongsberg AS | Wholesale & retail | 2026 |
| Invest 4WH AS | | 2020 |
| Invest 830 AS | Wholesale & retail | 2018 |
| Iot Labs AS | Professional & scientific | 2001 |
| Ips Norge - Bevisst Likepersonsarbeid AS | Professional & scientific | 2022 |
| Ireneusz Piotr Brys | Construction | 2009 |
| Isaksen Holding AS | Professional & scientific | 1985 |
| Isaksengården AS | Real estate | 2006 |
| Isebakke Holding AS | Real estate | 2018 |
| Isomann AS | Construction | 2021 |
| Itech System AS | Wholesale & retail | 1989 |
| Iti Ledelse AS | Professional & scientific | 2015 |
| Iton AS | Information & communication | 2000 |
| Ivinden.No AS | Wholesale & retail | 2014 |
| J S Eiendom AS | Real estate | 2009 |
| J U Eiendom AS | Real estate | 2005 |
| Jade Innovasjon AS | Administrative & support | 2019 |
| Jan Svenskerud Holding AS | Real estate | 2019 |
| Jan Torger Hvila AS | | 2021 |
| Janmar | Construction | 2007 |
| Jardar Invest AS | | 2026 |
| Jarenvegen 15 AS | Real estate | 2018 |
| Jarle Rimork AS | Professional & scientific | 2013 |