| Høst Forlag AS | Information & communication | 2026 |
| Høst Næringseiendom AS | Real estate | 2010 |
| Høstform AS | | 2021 |
| Høstmark Løve Holding AS | Administrative & support | 2020 |
| Høstsabbat AS | Arts & recreation | 2019 |
| Høvding Invest AS | Financial services | 1971 |
| Høvel AS | Financial services | 2016 |
| Høvern Holding AS | | 2021 |
| Høvik Eiendom AS | Real estate | 2010 |
| Høvik Inwest AS | Real estate | 1998 |
| Høvik Park AS | Real estate | 2016 |
| Høvik Sentrum Utvikling AS | | 2026 |
| Høvik Stasjonsby AS | Real estate | 2016 |
| Høvik Stasjonsby KS | Real estate | 2016 |
| Høvik Utbygging AS | | 2004 |
| Høvresli Drift AS | Administrative & support | 2024 |
| Høvresli Hytteområde AS | Real estate | 2022 |
| Høy Holding AS | Financial services | 2016 |
| Høy Taler AS | Arts & recreation | 2026 |
| Høybråten Blomster Og Begravelsesbyrå AS | Other services | 1996 |
| Høybråten Eiendom AS | Real estate | 2019 |
| Høybråten Fysikalske Institutt AS | Health & social care | 2004 |
| Høybråten Glasservice AS | Construction | 1991 |
| Høybråten Hjemmel Ans | Real estate | 2005 |
| Høybråten Holding AS | | 2025 |
| Høybråten Kafe Og Pizza Ans | Hospitality | 1995 |
| Høybråten Legekontor Da | Health & social care | 2015 |
| Høybråten Rørleggerbedrift AS | Construction | 2019 |
| Høybråten Tannklinikk AS | Health & social care | 2012 |
| Høybråtentrafikkskole AS | Education | 2025 |
| Høybråtenveien 52 AS | Construction | 2012 |
| Høybråtenveien 64 AS | Real estate | 2014 |
| Høybråtenveien 79 AS | Real estate | 2019 |
| Høybråtenveien AS | Real estate | 2025 |
| Høybråtenveien Holding AS | Real estate | 2022 |
| Høydahl & Co | Wholesale & retail | 1978 |
| Høyden AS | Construction | 2010 |
| Høyden Eiendom AS | Real estate | 2014 |
| Høyden Prosjekt AS | Professional & scientific | 2020 |
| Høye Nord AS | | 2010 |
| Høye Nord Invest AS | Real estate | 2017 |
| Høyenhall Boligutvikling AS | Real estate | 2019 |
| Høyer AS | Wholesale & retail | 2019 |
| Høyer Egertorget AS | Wholesale & retail | 2008 |
| Høyer Gruppen AS | Wholesale & retail | 2005 |
| Høyer Kapital AS | | 2020 |
| Høyer Markedsråd AS | Wholesale & retail | 1994 |
| Høyer Online AS | Wholesale & retail | 2016 |
| Høyer Oslo AS | Wholesale & retail | 2015 |
| Høyer Outlet Stavanger AS | Wholesale & retail | 2016 |
| Høyer Outlet Vestby II AS | Wholesale & retail | 2014 |
| Høyer Sjølyst AS | Wholesale & retail | 1996 |
| Høyer Stavanger AS | Wholesale & retail | 2007 |
| Høyer Torvet AS | Wholesale & retail | 2013 |
| Høyeraal Holding AS | | 2021 |
| Høyfjellstur AS | Education | 2020 |
| Høyholmen Holding AS | Professional & scientific | 2024 |
| Høymyrmarka 2 Eiendom AS | Real estate | 2014 |
| Høymyråsen AS | Real estate | 2017 |
| Høysand Horisont AS | Real estate | 2024 |
| Høyskel Holding AS | Transport & logistics | 1960 |
| Høyskolen for Dansekunst AS | Education | 2013 |
| Høyspent AS | Professional & scientific | 2014 |
| Høyspent Sør AS | Professional & scientific | 2024 |
| Høyspent Øst AS | Professional & scientific | 2016 |
| Høyum Holding AS | | 2024 |
| Hübert Invest AS | | 2026 |
| Hüllert Projects AS | Professional & scientific | 2020 |
| Hütten Holding AS | | 2019 |
| I Am - Integral Mentoring AS | Education | 2016 |
| I Am the Schütt AS | | 2020 |
| I Berteig AS | Health & social care | 2023 |
| I Empower Me AS | Administrative & support | 2018 |
| I Fokus AS | Financial services | 2026 |
| I Gode Hender Tannklinikk AS | Health & social care | 2025 |
| I Grunnen AS | Manufacturing | 2025 |
| I Invest AS | Information & communication | 2016 |
| I Receipt Norway AS | Information & communication | 2018 |
| I Ro AS | | 2024 |
| I Tronsmo AS | Wholesale & retail | 1937 |
| I Was a King Da | Arts & recreation | 2014 |
| I&A Management AS | Administrative & support | 2019 |
| I-D Interiørarkitektur & Design AS | Professional & scientific | 2020 |
| I-Labs AS | Information & communication | 2022 |
| I-Sec Norway Aviation Security AS | Professional & scientific | 2018 |
| I-Tech Norway AS | Wholesale & retail | 2023 |
| I-Vater AS | Real estate | 2006 |
| I. Nilsen Holding AS | | 2021 |
| I. Wohrm AS | | 2020 |
| I.A Holding AS | Real estate | 2015 |
| I.A.H. AS | Professional & scientific | 2024 |
| I.B.M Ireland Limited | Information & communication | 2009 |
| I.H.S. Holding AS | | 2023 |
| I.J. Oslo AS | Wholesale & retail | 2007 |
| I.T. International A/S | Real estate | 1988 |
| I/A Designstudio AS | Professional & scientific | 2017 |
| I1.NO AS | | 2012 |
| I1Z Studio AS | Wholesale & retail | 2025 |
| I2 Invest AS | Real estate | 2014 |
| I3 Labs AS | Information & communication | 2026 |