| Havnegata 94 AS | Real estate | 2014 |
| Havnegården Invest AS | Real estate | 2022 |
| Havnekvartalet Eiendom AS | Real estate | 2018 |
| Havnelageret Ensjø AS | Real estate | 2007 |
| Havnen Eiendom AS | Real estate | 2006 |
| Havnes & Schau Ans | Hospitality | 2001 |
| Havneutsikten AS | Real estate | 2007 |
| Havnevegen 24 AS | Real estate | 2021 |
| Havnevegen 50 AS | Real estate | 2025 |
| Havnor AS | Real estate | 2005 |
| Havnør Holding AS | Information & communication | 2007 |
| Havo Capital AS | Professional & scientific | 2020 |
| Havo Holding AS | | 2020 |
| Havo Invest AS | Information & communication | 2020 |
| Havport AS | Professional & scientific | 2023 |
| Havre AS | Information & communication | 2015 |
| Havre Labs AS | Information & communication | 2026 |
| Havreneset AS | Real estate | 2020 |
| Havrom AS | Transport & logistics | 2023 |
| Havrom Holding AS | | 2025 |
| Havsdalsgrenda Eiendom AS | Real estate | 2005 |
| Havsdalslia AS | Real estate | 2018 |
| Havsdalslie Eiendom AS | Real estate | 1997 |
| Havsgård AS | Information & communication | 2006 |
| Havsjå Holding AS | | 2024 |
| Havstad AS | Real estate | 2016 |
| Havstad Byåsveien 162 Eiendom AS | Real estate | 2014 |
| Havstruktur AS | Professional & scientific | 2021 |
| Havsule AS | Real estate | 2017 |
| Havtind AS | | 2020 |
| Havtind Konsult AS | Information & communication | 2026 |
| Havtor Eiendom AS | Real estate | 1993 |
| Havtor Holding AS | Real estate | 2009 |
| Havzun Holding AS | | 2025 |
| Hawaii Barcode AS | Hospitality | 2021 |
| Hawaii Oslo AS | Hospitality | 2018 |
| Haweka Norge AS | Wholesale & retail | 2003 |
| Hawes Signs Ltd | Construction | 1995 |
| Hawk Capital AS | | 2020 |
| Hawk Infinity AS | Information & communication | 2015 |
| Hawk Management AS | Financial services | 2019 |
| Hawk Seafood AS | Financial services | 2019 |
| Hawk Seafood Capital AS | | 2020 |
| Hawken AS | Professional & scientific | 2021 |
| Hawken Entreprenør AS | Manufacturing | 2026 |
| Hawkeye Invest AS | | 2024 |
| Hawkhill Invest AS | | 2023 |
| Hawks AS | Professional & scientific | 2021 |
| Hawkshao Holding AS | | 2025 |
| Hawler Transport AS | Transport & logistics | 2021 |
| Haxthausen Miljøtun AS | Professional & scientific | 2016 |
| Haxthausens Gate 7 AS | Real estate | 2025 |
| Hay Group AS | Professional & scientific | 1988 |
| Hay Norway AS | Wholesale & retail | 2009 |
| Hayabusa AS | Financial services | 2014 |
| Hayahflytte AS | Transport & logistics | 2025 |
| Hayart AS | Wholesale & retail | 2025 |
| Hayde AS | Arts & recreation | 2025 |
| Hayde Bluegrass Orchestra AS | Arts & recreation | 2022 |
| Haymaker AS | Professional & scientific | 2019 |
| Hayon AS | Financial services | 2018 |
| Haystack Holding AS | Information & communication | 2020 |
| Hayyan Salha AS | Wholesale & retail | 2025 |
| Haz International Ltd Nuf | Construction | 2012 |
| Haz Invest AS | | 2025 |
| Haze 8 Ventures AS | Professional & scientific | 2026 |
| Haze Enterprise AS | Wholesale & retail | 2017 |
| Haze Holding AS | Financial services | 2008 |
| Hazeland & Lexau Eiendom AS | Real estate | 2021 |
| Hazeland Invest AS | Real estate | 2019 |
| Hazlo AS | Information & communication | 2012 |
| HB Frisør AS | Other services | 2013 |
| HB Holther Arkitekt Mnal AS | Professional & scientific | 2016 |
| HB Invest AS | | 2019 |
| HB Korse AS | Wholesale & retail | 2023 |
| HB Optics AS | Financial services | 2018 |
| HB Vika AS | Education | 2025 |
| HB Woman AS | Wholesale & retail | 2008 |
| HBD Holding AS | | 2022 |
| Hbdnest AS | | 2026 |
| Hbe Invest AS | | 2023 |
| Hbe Rådgivning AS | Professional & scientific | 2020 |
| Hbfo Invest AS | Real estate | 2009 |
| HBH AS | Financial services | 2005 |
| Hbi Holding AS | Information & communication | 2024 |
| Hbi Norge AS | Wholesale & retail | 2020 |
| HBJ AS | | 2021 |
| HBK Invest AS | Real estate | 2018 |
| HBN Invest AS | | 2021 |
| HBN Master AS | Information & communication | 2025 |
| HBN Prosjekt Og Utvikling AS | Professional & scientific | 2014 |
| Hbo Nordic Services Norway AS | Professional & scientific | 2012 |
| HBP Transport AS | Transport & logistics | 2020 |
| HBR Eiendom AS | Real estate | 2020 |
| HBR Invest AS | Real estate | 2014 |
| HBS Eiendom AS | | 2022 |
| HBS Nordic AB | Wholesale & retail | 2011 |
| HBT Support AS | Real estate | 2000 |
| HBW Invest AS | | 2011 |
| Hbø Capital AS | | 2026 |