| HHV32 AS | Real estate | 2017 |
| Hhønt Holding AS | Arts & recreation | 2024 |
| Hi Cap Bidco 2023-5 AS | | 2023 |
| Hi Cap Bidco 2025-6 AS | | 2025 |
| Hi Cap Bidco 2026-1 AS | | 2026 |
| Hi Cap Bidco 2026-2 AS | | 2026 |
| Hi Capital AS | Construction | 2011 |
| Hi Ka Ri AS | Hospitality | 2022 |
| Hi Ka Ri Holding AS | Hospitality | 2022 |
| Hi Motion & Design Ans | Information & communication | 2023 |
| Hi Topco AS | | 2017 |
| Hi, Agency AS | Information & communication | 2026 |
| Hi-Fi Klubben AS | Wholesale & retail | 1975 |
| HI4 Solutions AS | Information & communication | 2019 |
| Hia Productions Da | Arts & recreation | 2010 |
| Hiaas Invest AS | Financial services | 2016 |
| Hiape AS | Professional & scientific | 2024 |
| Hiawataband Da | Arts & recreation | 2007 |
| Hib Consulting AS | Professional & scientific | 2021 |
| Hibi AS | Manufacturing | 2024 |
| Hibis AS | Professional & scientific | 2015 |
| Hibis Holding AS | Professional & scientific | 2008 |
| Hibo Invest AS | | 2019 |
| Hibt AS | | 2018 |
| Hickory AS | | 2026 |
| Hicksville Invest AS | Financial services | 2005 |
| Hidden Paradise AS | Information & communication | 2018 |
| Hiddn Security AS | Information & communication | 2023 |
| Hiddn Technology AS | Information & communication | 2019 |
| Hide and Seek AS | Administrative & support | 2020 |
| Hide Teksttjenester AS | Arts & recreation | 2023 |
| Hidge AS | | 2020 |
| Hidroskliniken I Norge AS | Health & social care | 2025 |
| Hien Pham AS | Health & social care | 2013 |
| Hieronymus Heyerdahls Gate 1 AS | Real estate | 2003 |
| Hieronymus Heyerdahls Gate 1 Holding AS | Real estate | 2018 |
| HIG100 AS | Real estate | 2026 |
| HIG48 AS | Real estate | 2017 |
| HIG48 Felleskost AS | Real estate | 2023 |
| High 5 AS | | 2013 |
| High Access Solutions AS | Construction | 2012 |
| High Coast AS | | 2017 |
| High Kites Regnskap Oslo AS | Professional & scientific | 2024 |
| High Spirits AS | Wholesale & retail | 2001 |
| High Street AS | Real estate | 2026 |
| High Street Shopping AS | Real estate | 2017 |
| High Tech Promotion AS | Professional & scientific | 2002 |
| High Tech Warehouse Ans | Wholesale & retail | 2000 |
| High Voltage Audio AS | Information & communication | 2016 |
| High Yield AS | Real estate | 2020 |
| High Yield Crew Carriers AS | Transport & logistics | 2026 |
| High Yield Property AS | Financial services | 2019 |
| High-End AS | | 2017 |
| Highasakite AS | Arts & recreation | 2024 |
| Highered AS | Information & communication | 2015 |
| Higheredos AS | Professional & scientific | 2025 |
| Highfive Munch AS | Hospitality | 2019 |
| Highjump Event AS | Real estate | 2007 |
| Highlander Supply AS | Transport & logistics | 2023 |
| Highlander Tankers AS | Transport & logistics | 2014 |
| Highwind AS | Professional & scientific | 2020 |
| Hignett AS | Financial services | 2016 |
| Higton Bros. AS | Information & communication | 2014 |
| Higton Brothers Holding AS | | 2025 |
| Hih 16 AS | | 2025 |
| Hih 17 AS | | 2025 |
| Hih 18 AS | | 2025 |
| Hih 19 AS | | 2025 |
| Hih 20 AS | | 2025 |
| Hih 21 AS | | 2025 |
| Hih 22 AS | | 2025 |
| Hih 23 AS | | 2026 |
| Hih 25 AS | | 2026 |
| Hih 26 AS | | 2026 |
| Hih 27 AS | | 2026 |
| Hih CC Bidco AS | | 2026 |
| Hih FS AS | | 2026 |
| Hih FS Norway AS | | 2026 |
| Hih I AS | Information & communication | 2022 |
| Hih II AS | Information & communication | 2023 |
| Hih III AS | Construction | 2023 |
| Hih IV AS | | 2024 |
| Hih Ix AS | | 2025 |
| Hih S Bidco AS | | 2026 |
| Hih V AS | | 2024 |
| Hih Vi AS | | 2024 |
| Hih Vii AS | Health & social care | 2024 |
| Hih Viii AS | | 2024 |
| Hih X AS | | 2025 |
| Hih Xi AS | | 2025 |
| Hih Xii AS | | 2025 |
| Hih Xiii AS | | 2025 |
| Hih Xiv AS | | 2025 |
| Hih XV AS | | 2025 |
| Hiiko AS | Information & communication | 2026 |
| Hija Bi AS | Wholesale & retail | 2025 |
| Hijab Hus Norway AS | Wholesale & retail | 2021 |
| Hijo Capital AS | | 2023 |
| Hiki AS | Information & communication | 2016 |
| Hilbmed AS | Real estate | 2014 |