| Hugo.Tech AS | Information & communication | 2022 |
| Hugos Norge AS | Wholesale & retail | 1995 |
| Hugoworld AS | Arts & recreation | 2002 |
| Hummeren Eiendom Ans | Real estate | 2000 |
| Hummingbird Drift AS | Real estate | 1995 |
| Hummingbird Property AS | Real estate | 2020 |
| Hundseid Eiendom AS | Real estate | 2021 |
| Hunemo Holding AS | Energy | 2020 |
| Huracan AS | Real estate | 2019 |
| Husebye Holding AS | | 2022 |
| Huset I Markens AS | Other services | 2012 |
| Husholdts AS | Real estate | 2015 |
| Husmorgården Bolig AS | Real estate | 2018 |
| Husmorskolen Eiendom AS | Real estate | 2024 |
| Husvarme AS | Construction | 2012 |
| Husvær Brygge AS | Real estate | 2015 |
| Huynh Eiendom AS | Real estate | 2000 |
| Hvalsmarken Bygg AS | Construction | 2014 |
| Hveding Bygg AS | Construction | 2024 |
| Hvilsby AS | | 2023 |
| Hvorfor Ikke Holding AS | | 2022 |
| HW GT 19 AS | Real estate | 2025 |
| Hwe Invest AS | Professional & scientific | 2014 |
| HWS AS | Real estate | 2023 |
| HWT Invest AS | | 2025 |
| Hydraspecma Norge AS | Wholesale & retail | 2019 |
| Hygge Holding AS | Professional & scientific | 2018 |
| Hyggly AS | Wholesale & retail | 2026 |
| Hyllami AS | Professional & scientific | 2011 |
| Hyo AS | Administrative & support | 2024 |
| Hytte Og Boligutvikling AS | Real estate | 2009 |
| Hyttetomter AS | Real estate | 2021 |
| Håbesland Bygg AS | Construction | 2026 |
| Håkon Andersen Holding AS | | 2023 |
| Håkon Pettersen Bygg AS | Construction | 2024 |
| Håkon S Hansen AS | Real estate | 1974 |
| Håkon S Holding AS | Real estate | 1980 |
| Håland Invest AS | Real estate | 2020 |
| Håland Vaktmesterservice AS | Administrative & support | 2020 |
| Håndverkeren Restaurant & Pub AS | Hospitality | 2013 |
| Hånes Bygg AS | Real estate | 2007 |
| Hånes Eiendom AS | Real estate | 2003 |
| Håneskrysset Butikkdrift AS | Wholesale & retail | 2023 |
| Håneskrysset Eiendom AS | Real estate | 2002 |
| Håneskrysset Gatekjøkken AS | Hospitality | 2023 |
| Hånesveien 108 AS | Real estate | 2020 |
| Hånesveien 116 AS | Real estate | 2018 |
| Hånesveien 126 AS | Real estate | 2025 |
| Hårdesign a Salong AS | Other services | 1988 |
| Hårdesign a Salong C4 AS | Other services | 2007 |
| Hårdesign A-Salong 2 Etg. AS | Other services | 2013 |
| Hårdesign A-Salong Skippergata AS | Other services | 2020 |
| Hårpleieren AS | Wholesale & retail | 2018 |
| Hårstrået AS | Other services | 2013 |
| Hårtåppen AS | Other services | 2013 |
| Håtveit AS | Agriculture & fishing | 2023 |
| Håøya AS | Real estate | 2021 |
| Hægeland Industries AS | | 2024 |
| Hægeland Marine AS | Wholesale & retail | 2025 |
| Hægg Holding AS | | 2023 |
| Hærøya Utvikling AS | Real estate | 2020 |
| Høgsaas Invest AS | Information & communication | 2025 |
| Høie Næringspark AS | Real estate | 1986 |
| Høivold Holding AS | Financial services | 2005 |
| Høllen Brygge Drift AS | Wholesale & retail | 2025 |
| Høllen Brygge Eiendom AS | Real estate | 2000 |
| Høllen Holding AS | Real estate | 1992 |
| Høllen Vest Eiendom AS | Real estate | 1973 |
| Høster AS | Real estate | 1986 |
| Høvågskauen AS | Real estate | 2012 |
| Høvågveien 10 AS | Real estate | 2008 |
| Høyde Service AS | Administrative & support | 2001 |
| Høyde Teknikk AS | Administrative & support | 1987 |
| Høye Holding AS | Energy | 2022 |
| Høyfjellshytter AS | Real estate | 2019 |
| Høyland Gård Lindesnes Da | Agriculture & fishing | 1997 |
| Høyland Holding AS | Professional & scientific | 2021 |
| Høyres Hus AS | Real estate | 1964 |
| Høyåsheia Tomteselskap AS | Real estate | 2018 |
| I-Drift AS | Information & communication | 2016 |
| I-T Invest AS | Real estate | 2008 |
| I.H. Øgrey Invest AS | Financial services | 2005 |
| Ia Holding AS | | 2025 |
| Iab Holding AS | Financial services | 2005 |
| Iak AS | Health & social care | 2023 |
| Ibanez Holding AS | Health & social care | 2009 |
| IBOX1 AS | Transport & logistics | 2015 |
| Ibt Medisinsk Teknologi AS | Professional & scientific | 2026 |
| Ica Invest AS | Professional & scientific | 2025 |
| Icb Invest AS | Real estate | 2005 |
| Icon Hair AS | Wholesale & retail | 2001 |
| Icon Holding Norge AS | Wholesale & retail | 2021 |
| Iconsultable AS | Information & communication | 2007 |
| Ictoffice AS | Information & communication | 2020 |
| Id Musikk AS | Wholesale & retail | 1989 |
| Id-Finans AS | Financial services | 2005 |
| Ideline Eiendom AS | Financial services | 2005 |
| Identec Solutions Norway AS | Information & communication | 2003 |
| Idsøe Bentsen AS | | 2024 |
| Idèskilt AS | Professional & scientific | 2006 |