| Hovda Kaald AS | Wholesale & retail | 2006 |
| Hovdas AS | Financial services | 2015 |
| Hovden Fjellpark AS | Real estate | 1982 |
| Hovland Invest AS | Real estate | 2005 |
| Hovland Investering AS | | 2020 |
| HPT AS | Wholesale & retail | 2025 |
| HRH I AS | Manufacturing | 2013 |
| HRH II AS | Manufacturing | 2017 |
| Hrlilo Holding AS | Arts & recreation | 2023 |
| HS Investering AS | Financial services | 2005 |
| HT Marine AS | Professional & scientific | 2023 |
| Ht-Eiendom AS | Real estate | 2009 |
| Htk-Hallen AS | Arts & recreation | 2020 |
| HTL Bygg AS | Real estate | 2020 |
| Huanca AS | Professional & scientific | 2024 |
| Hubbo AS | Hospitality | 2024 |
| Hud & Estetik DR Bartosik AB | Health & social care | 2006 |
| Huk Aveny AS | Arts & recreation | 2006 |
| Hune 13 AS | Real estate | 2019 |
| Hustveit Eiendom AS | Real estate | 2003 |
| Husøyvegen 270 AS | Real estate | 2021 |
| HV Kontor AS | Real estate | 2012 |
| HV. Holding AS | Financial services | 2016 |
| Hvamm Holding AS | | 2023 |
| Hvo Eiendom AS | Real estate | 2025 |
| Hvo Invest AS | | 2025 |
| Hybridgress AS | Wholesale & retail | 2022 |
| Hydrogenious Lohc Maritime AS | Professional & scientific | 2021 |
| Hynano ASA | Professional & scientific | 2025 |
| Hystad Boliginvest AS | Real estate | 2012 |
| Haco Eiendom AS | Real estate | 1927 |
| Håkon Andreassen Ha Holding AS | Health & social care | 2017 |
| Håkon Jarl Invest AS | Real estate | 2022 |
| Hårfagre Frisør AS | Other services | 2013 |
| Høgenæs & Gulliksen Holding AS | Professional & scientific | 2017 |
| Høines Holding AS | | 2020 |
| Høvring Safety Anchor Handling Ans | Manufacturing | 1997 |
| Høyer Haugesund AS | Wholesale & retail | 2011 |
| Høystrøm AS | Wholesale & retail | 2018 |
| Høyvik Eiendom Invest AS | Wholesale & retail | 2013 |
| Høyvik Fagblomster AS | Wholesale & retail | 2001 |
| I Øvereng AS | Professional & scientific | 2020 |
| Iam Investing AS | Real estate | 2020 |
| Ibo Raglamyr AS | Wholesale & retail | 2020 |
| Ibs Holding AS | | 2026 |
| Ice 2 Invest AS | | 2026 |
| Ice Invest AS | | 2021 |
| Icepond AS | | 2022 |
| Idar AS | Manufacturing | 2021 |
| Ide Farver AS | Wholesale & retail | 1993 |
| Idrettsparken Fysioterapi AS | Real estate | 2012 |
| Ifchor Galbraiths Offshore & Renewables AS | Professional & scientific | 2010 |
| Ifocus Optikk Haugesund AS | Wholesale & retail | 2015 |
| Ifocus Øyeklinikk Haugesund AS | Health & social care | 2012 |
| Iforvaltning AS | Real estate | 2017 |
| Iglo AS | Manufacturing | 1935 |
| Ih Bygg AS | Real estate | 2024 |
| Ihc AS | Professional & scientific | 2018 |
| Ijs Investering AS | | 2025 |
| Ikm Elektrodrift AS | Manufacturing | 2008 |
| Ikm PRS Services AS | Professional & scientific | 2025 |
| Il Forno AS | Hospitality | 2011 |
| Il Invest AS | Real estate | 2020 |
| Illuminating Concepts AS | Education | 2018 |
| Imi Haugaland Begravelsesbyrå AS | Other services | 1995 |
| Impaxer AS | | 2024 |
| In Concept Beauty | Other services | 2006 |
| In Consept Bingo Ans | Arts & recreation | 2001 |
| India Gate Indisk Restaurant & Bar AS | Hospitality | 2012 |
| Indre Eide AS | Real estate | 2008 |
| Industrigata 15 AS | Real estate | 2022 |
| Industrigata 24 AS | Real estate | 2021 |
| Inermo Invest Holding AS | Professional & scientific | 2010 |
| Inero Experience AS | Information & communication | 2026 |
| Infranova Survey AS | Professional & scientific | 2026 |
| Inge Vaaga AS | Construction | 2005 |
| Ingeniør S. G. Langaker AS | Professional & scientific | 2025 |
| Ingeniørfirmaet Jone Lothe AS | Professional & scientific | 1987 |
| Inma Holding AS | | 2005 |
| Innovatech AS | | 2018 |
| Innovative Talent AS | Professional & scientific | 2022 |
| Inocare Eiendom AS | Real estate | 2021 |
| Inside Interiør AS | Wholesale & retail | 1998 |
| Inspectio AS | Information & communication | 2020 |
| Instrument Commissioning Services AS | Professional & scientific | 1992 |
| Instudio AS | Information & communication | 2025 |
| Inter Gruppen AS | Administrative & support | 2020 |
| Interhaug Holding AS | Wholesale & retail | 2003 |
| Intersport Haugesund AS | Wholesale & retail | 1971 |
| Inventum Eiendom AS | Real estate | 2011 |
| Inventum Event AS | Administrative & support | 2020 |
| Inventum Holding AS | Hospitality | 1995 |
| Inventum Servering AS | Hospitality | 2000 |
| Invicta Invest AS | Real estate | 2012 |
| Inweb AS | Information & communication | 2022 |
| Ios Pleie AS | Wholesale & retail | 2020 |
| Irene Sandvik Solberg AS | Professional & scientific | 2022 |
| Irgu Invest AS | | 2022 |
| Isel Holding AS | Construction | 2023 |
| Isentrum Eiendom AS | Real estate | 2021 |