| Hjemmelegene BHT AS | Health & social care | 2022 |
| Hjemmepleie AS | Health & social care | 2012 |
| Hjemom Granstangen Park Hus 18 AS | Real estate | 2023 |
| Hjemom Granstangen Park Hus 19-22 AS | Real estate | 2023 |
| Hjernen Bak AS | Education | 2005 |
| Hjernesterk AS | Education | 2021 |
| Hjernetrimmen AS | Education | 2015 |
| Hjerpe Holding AS | | 2020 |
| Hjerpseth Byggservice AS | Construction | 2022 |
| Hjertaas Konsulenttjenester AS | Wholesale & retail | 2025 |
| Hjertaker Aaberg AS | Professional & scientific | 2025 |
| Hjerte 24/7 AS | Other services | 2025 |
| Hjerte Konditori AS | Wholesale & retail | 2015 |
| Hjertefryd Da | Wholesale & retail | 2013 |
| Hjerteleker AS | Wholesale & retail | 2025 |
| Hjertesenteret AS | Health & social care | 2023 |
| Hjertespesialist Loreta S. Strøm AS | Health & social care | 2024 |
| Hjertetsvei AS | Education | 2021 |
| Hjertheim AS | Professional & scientific | 2019 |
| Hjertholm Holding AS | | 2021 |
| Hjertly AS | Professional & scientific | 2025 |
| Hjertson Holding AS | | 2023 |
| HJH AS | Wholesale & retail | 2006 |
| Hjholding AS | | 2025 |
| Hjkl AS | Information & communication | 2024 |
| Hjnordic AS | Wholesale & retail | 2024 |
| Hjorth AS | | 2022 |
| Hjorth Eiendom AS | Real estate | 2007 |
| Hjorth Eiendom Og Invest AS | Real estate | 1997 |
| Hjorth Holding AS | | 2008 |
| Hjorth Invest AS | Real estate | 2007 |
| Hjortheb AS | Information & communication | 2025 |
| HJP Invest AS | | 2021 |
| Hjula Væveri Halvor Schou AS | Real estate | 2021 |
| Hjulklart AS | Wholesale & retail | 2023 |
| Hjums Eiendom AS | Real estate | 2022 |
| Hjørnesteiner AS | | 2025 |
| Hjørnet Firma Service AS | Administrative & support | 2015 |
| Hjørnet Kolonial AS | Wholesale & retail | 2022 |
| Hjørnet På Røa AS | Hospitality | 2025 |
| Hjørnetannlegene AS | Health & social care | 2014 |
| Hjørnevik AS | Wholesale & retail | 2015 |
| Hjørundfjorden AS | Financial services | 2015 |
| HK 1 Innvest AS | | 2020 |
| HK Capital AS | | 2016 |
| HK Consult AS | Professional & scientific | 2004 |
| HK Element Da | Arts & recreation | 2009 |
| HK Fil AS | Wholesale & retail | 2021 |
| HK Fitness Consulting AS | Education | 2021 |
| HK Forvaltning AS | Transport & logistics | 2022 |
| HK HCH AS | Real estate | 2017 |
| HK Holdings AS | | 2022 |
| HK Invent AS | Professional & scientific | 1987 |
| HK Investing AS | | 2024 |
| HK Maskindrift AS | Transport & logistics | 2025 |
| HK Polymer AS | Financial services | 2005 |
| HK Regnskap AS | Professional & scientific | 2004 |
| HK Tekniske Tjenester AS | Professional & scientific | 2020 |
| Hk-Capital AS | | 2023 |
| Hk-Klubben I Lo | Other services | 2000 |
| Hka Global Ltd Nuf | Professional & scientific | 2025 |
| Hka Invest AS | Financial services | 2012 |
| Hkbh Holding AS | | 2019 |
| Hkbh Invest AS | | 2025 |
| HKG AS | | 2023 |
| HKH AS | Professional & scientific | 2015 |
| HKH Invest AS | Information & communication | 2021 |
| HKH Property AS | Professional & scientific | 2025 |
| Hki Holding AS | Health & social care | 2024 |
| Hkkr AS | Professional & scientific | 2005 |
| Hkkr Invest AS | Manufacturing | 2012 |
| HKN Securities AS | | 2021 |
| Hkoll Holding AS | | 2025 |
| Hkova Holding AS | | 2025 |
| HKR Invest AS | | 2023 |
| HKT AS | Financial services | 2016 |
| HKW Advokatfirma AS | | 2025 |
| HL & SP Rådgivning AS | Financial services | 2022 |
| HL Holding AS | Financial services | 2005 |
| HL Invest AS | Real estate | 2015 |
| HL Ventures AS | | 2021 |
| Hlholding AS | | 2024 |
| Hlif Holding AS | | 2025 |
| HLK Invest AS | Real estate | 2008 |
| HLL Studio AS | Hospitality | 2023 |
| Hll-Holding AS | Hospitality | 2023 |
| Hlorride AS | Real estate | 2009 |
| HLS Holding AS | Information & communication | 2018 |
| HLW AS | Health & social care | 2025 |
| HM 33 Invest AS | Real estate | 2019 |
| HM Bjerge Holding AS | | 2022 |
| HM Bygg Og Flis AS | Construction | 2026 |
| HM Helse AS | Professional & scientific | 2025 |
| HM Håndverker AS | Construction | 2026 |
| HM Invest Holding AS | Real estate | 2006 |
| HM Investerer AS | | 2026 |
| HM Kapital AS | Health & social care | 2020 |
| HM Rør AS | Construction | 2011 |
| HM Transport AS | Transport & logistics | 2012 |
| Hma AS | Professional & scientific | 2025 |