| Hennum Holding AS | Professional & scientific | 2006 |
| Hennum Invest AS | Professional & scientific | 2021 |
| Hennum Solutions AS | Real estate | 2015 |
| Henrik Ibsens Gate 8 AS | Real estate | 2011 |
| Henrik Rosenvold Invest AS | | 2018 |
| Hentiåsen Utvikling AS | Real estate | 2018 |
| Herkules Bilvask Da | Other services | 2011 |
| Herkules Helsekost AS | Wholesale & retail | 2014 |
| Herkules Kafe AS | Hospitality | 2005 |
| Herkules Klokker Og Smykker AS | Wholesale & retail | 2007 |
| Herkules Skomaker AS | Other services | 2017 |
| Herman Baggers Gate 12 AS | Real estate | 2022 |
| Herman Baggers Gate 14 AS | Real estate | 2022 |
| Herman Vegheim AS | Construction | 2023 |
| Herøya Hills Holding AS | Real estate | 2024 |
| Hesselberggaten 4 AS | Real estate | 2006 |
| Hestesport Holding AS | Real estate | 2015 |
| Hestesport-Centeret AS | Wholesale & retail | 2015 |
| HG Maskin AS | Construction | 2020 |
| HGH Invest AS | Financial services | 2005 |
| Hh&F Eiendom AS | Real estate | 2021 |
| HHN Eiendom AS | Real estate | 2011 |
| Hibernian Eiendom AS | Real estate | 2015 |
| Hibernian Holding AS | Wholesale & retail | 2005 |
| High Vibration Ans | Wholesale & retail | 1996 |
| Hillevåg Elektro-Diesel Avd Grenland AS | Wholesale & retail | 1989 |
| Himmelblå AS | Professional & scientific | 2026 |
| Himmelblå Barnevern AS | Health & social care | 2015 |
| Himmelblå Bpa AS | Health & social care | 2023 |
| Himmelblå Fosterhjem AS | Health & social care | 2026 |
| Himmelblå Helse Og Omsorg AS | Health & social care | 2019 |
| Hits AS | Financial services | 2005 |
| Hjellen Terrasse AS | Real estate | 2022 |
| Hjem Og Industrirenhold AS | Administrative & support | 1997 |
| Hjerterom AS | Wholesale & retail | 2007 |
| Hjerterommet Familiebarnehage AS | Education | 2006 |
| Hjulius Skien AS | Wholesale & retail | 2007 |
| Hjørnekontor AS | | 2026 |
| HK Group AS | Wholesale & retail | 1989 |
| HKS AS | Wholesale & retail | 2019 |
| HMS Maskin AS | Wholesale & retail | 2015 |
| HMS Rådgivning AS | Health & social care | 2020 |
| Hoels Hagesenter AS | Agriculture & fishing | 1997 |
| Hoh Holding AS | Construction | 2020 |
| Hoison AS | | 2010 |
| Hokky Holding AS | | 2026 |
| Holberg-Eiendom AS | Real estate | 2025 |
| Holbergsgate 14 AS | Real estate | 2008 |
| Holding Bårdsen AS | | 2019 |
| Holding Holding AS | Real estate | 2006 |
| Holgersen AS | Information & communication | 2020 |
| Holistic Biceps AS | Health & social care | 2021 |
| Holm Investering AS | Real estate | 2021 |
| Holmed AS | Health & social care | 2013 |
| Holtan Drift AS | Other services | 2020 |
| Holte Og Lia Eiendom 2 AS | Real estate | 2017 |
| Holthe Engineering AS | Information & communication | 2024 |
| Holthe Marketing AS | Professional & scientific | 2020 |
| Homleids Klær AS | Wholesale & retail | 1987 |
| Hopes Tradisjonsmat AS | Manufacturing | 2023 |
| Hoppestad AS | Real estate | 2017 |
| Hoppestad Gård AS | Agriculture & fishing | 2018 |
| Hoppestad Naturlig AS | Agriculture & fishing | 2016 |
| Hoppestad Supermat AS | Agriculture & fishing | 2016 |
| Hornslien Holding AS | | 2023 |
| Hotel Bryggeparken AS | Hospitality | 2001 |
| Hotel Nora AS | Real estate | 2018 |
| Hotkon AS | Administrative & support | 2017 |
| Hotwheelpizza AS | Hospitality | 2020 |
| Hovet Skole Eiendom AS | Real estate | 2016 |
| Hovetbakken 6 AS | Real estate | 2023 |
| Hovholt Gård AS | Real estate | 2024 |
| Hovland Stall Og Utleie AS | Agriculture & fishing | 2025 |
| HR Partner AS | Education | 2012 |
| HS Salg AS | Real estate | 2010 |
| Hsinvest AS | Real estate | 2018 |
| HSL Holding AS | Real estate | 2006 |
| HST Maskin AS | Construction | 2011 |
| HT Eiendom AS | Real estate | 2005 |
| HTV Holding AS | Financial services | 2005 |
| Hud Og Fot AS | Other services | 2008 |
| Hud- Og Tannestetikk AS | Other services | 2024 |
| Hugo Pedersen Holding AS | | 2026 |
| Huldra Eiendom AS | Real estate | 2011 |
| Huldra Film AS | Information & communication | 2013 |
| Huldreverket Gull Og Sølv AS | Manufacturing | 2023 |
| Hulita Holding AS | Financial services | 2020 |
| Husebø Invest AS | | 2026 |
| Husfliden AS | Wholesale & retail | 1988 |
| Husholder AS | Real estate | 2020 |
| Hustvedt Gård Da | Agriculture & fishing | 2011 |
| Huuse AS | | 2022 |
| Huuse Invest AS | Financial services | 2011 |
| Hvalen Bolig AS | Real estate | 2022 |
| HWD Investments AS | | 2024 |
| Hybeko AS | Wholesale & retail | 2007 |
| Hybert Invest AS | | 2023 |
| Hydel AS | Manufacturing | 2020 |
| Hydra Finans AS | Financial services | 2021 |
| Hydrogentech AS | | 2012 |