| Hvam Eiendom Invest AS | Real estate | 2018 |
| Hvamstubben Næringsbygg AS | Real estate | 2016 |
| Hvamsvingen 5 AS | Real estate | 2009 |
| Hvamsvingen II AS | Wholesale & retail | 2017 |
| Hvamsvingen Invest AS | | 2016 |
| Hvamtunet Eiendom AS | Real estate | 1989 |
| Hvamveien 1 AS | Real estate | 2016 |
| Hvamveien 4 Ans | Real estate | 1985 |
| Hvarok Research AS | | 2025 |
| Hvass AS | Administrative & support | 2004 |
| Hvasser Invest AS | | 2021 |
| Hvasser Nord AS | Real estate | 2023 |
| Hvattum Invest AS | | 2019 |
| Hve Holding AS | | 2023 |
| Hveding & Co Invest AS | | 2025 |
| Hveem Eiendom Invest AS | | 2023 |
| Hveisel AS | Information & communication | 2017 |
| Hvemm AS | Professional & scientific | 2024 |
| Hverdag AS | Information & communication | 1976 |
| Hvessa AS | Information & communication | 2026 |
| Hvflk AS | | 2016 |
| Hvibra Holding AS | | 2024 |
| Hvice AS | Hospitality | 2019 |
| Hvidsten Eiendom AS | Real estate | 1996 |
| Hvidsten Invest AS | Real estate | 2017 |
| Hvild AS | Health & social care | 2023 |
| Hvild Holding AS | Professional & scientific | 1968 |
| Hvild Life & Health AS | Financial services | 2014 |
| Hvistendahl Og Tveter AS | Wholesale & retail | 1961 |
| Hvit Lotus Renova AS | Construction | 2020 |
| Hvit Luft Ans | Professional & scientific | 2014 |
| Hviteberg AS | | 2023 |
| Hvitesider Ans | Information & communication | 1997 |
| Hvitsten AS | Financial services | 2021 |
| Hvitsten Eiendom AS | Real estate | 2014 |
| Hvitsten II Holdco AS | | 2022 |
| Hvitsten II JV AS | Energy | 2022 |
| Hvittingfossveien 123 AS | Real estate | 2012 |
| Hvittingfossveien 131 AS | Real estate | 2015 |
| Hvittingfossveien 153 AS | Real estate | 2021 |
| Hvittingfossveien 153 Holding AS | Real estate | 2021 |
| Hvittingfossveien Drift AS | Real estate | 2006 |
| Hvitveis Holding AS | | 2025 |
| Hvitveisen Barnehage Ans | Education | 1994 |
| Hvitveisen Barnehage AS | Education | 2000 |
| HVM Invest AS | | 2021 |
| Hvmk Holding AS | | 2025 |
| HVN8 AS | | 2004 |
| HW Brands AS | Wholesale & retail | 2026 |
| HW Shoes AS | Professional & scientific | 2016 |
| Hwa 12 AS | Real estate | 2025 |
| HWB AS | Professional & scientific | 2026 |
| Hwbb Holding AS | | 2025 |
| Hwe AS | | 2021 |
| HWH Eiendom AS | Professional & scientific | 2017 |
| HWH Ellingsrudveien AS | Real estate | 2022 |
| HWH Hartmann AS | Real estate | 2023 |
| HWH Kapital AS | Real estate | 2019 |
| HWH Lettvint AS | Real estate | 2024 |
| HWH Nordalveien AS | Real estate | 2020 |
| HWH Rudheim AS | Real estate | 2023 |
| HWH Team Brokers Oslo Nuf | Transport & logistics | 2008 |
| HWM AS | Real estate | 2019 |
| Hwo:Consult AS | Professional & scientific | 2013 |
| HWS Holding AS | | 2024 |
| HWS Hunger Hydraulik Weltweit- Service GmbH Nuf | Manufacturing | 2022 |
| HX Digital AS | Information & communication | 2026 |
| HX Expedition Cruises AS | Transport & logistics | 2021 |
| HX Expeditions AS | Transport & logistics | 2021 |
| HX Finance II AS | Transport & logistics | 2017 |
| HX Finance III AS | Transport & logistics | 2015 |
| HX Finance IV AS | Transport & logistics | 2015 |
| HX Invest AS | | 2021 |
| HX No AS | Transport & logistics | 2024 |
| HX Shorex AS | Transport & logistics | 2019 |
| HX Vessels AS | Transport & logistics | 2019 |
| HXB AS | Information & communication | 2021 |
| HXB Invest AS | Information & communication | 2021 |
| Hxoys AS | | 2024 |
| Hy Vedlikehold Og Byggetjenester AS | Construction | 2023 |
| Hy's Invest AS | Real estate | 2021 |
| Hy's Sushi AS | Hospitality | 2015 |
| Hybe AS | Construction | 2008 |
| Hybel AS | Information & communication | 2011 |
| Hybelbygg Bærum Holding AS | Real estate | 2020 |
| Hybr AS | Information & communication | 2025 |
| Hybrid Future AS | | 2024 |
| Hybridclay AS | Professional & scientific | 2018 |
| Hybridge Mezzanine AS | Financial services | 2021 |
| Hybrion AS | Professional & scientific | 2005 |
| Hybris Media AS | Financial services | 2013 |
| Hybrium Da | Professional & scientific | 2001 |
| Hyd Nordic AS | Wholesale & retail | 2026 |
| Hydalen AS | Financial services | 2005 |
| Hydex Fluid Power AS | Wholesale & retail | 2009 |
| Hydex Instrumatic AS | Wholesale & retail | 2008 |
| Hydia AS | Real estate | 2015 |
| Hydna AS | Professional & scientific | 2019 |
| Hydor AS | Financial services | 2009 |
| Hydor Bidco AS | | 2022 |