| Helsekost Oasen AS | Wholesale & retail | 2015 |
| Heltor AS | Information & communication | 2000 |
| Hennings El-Spark Verksted Limited Nuf | Other services | 2025 |
| Hervik Invest AS | Manufacturing | 2005 |
| Hg-Invest AS | Professional & scientific | 2011 |
| Hipe-Holding AS | Administrative & support | 2007 |
| Hjørna AS | Hospitality | 2025 |
| HKK AS | | 2021 |
| Hofstad Services & Invest AS | Administrative & support | 2026 |
| Hovedgaten 29 AS | Real estate | 2017 |
| HS Montasje AS | Construction | 2013 |
| HTH Haugesund AS | Wholesale & retail | 2006 |
| Huwim AS | Information & communication | 2017 |
| Hyem AS | Wholesale & retail | 2025 |
| Håland Eiendom AS | Real estate | 2001 |
| Håndverksmur Haugesund AS | Construction | 2007 |
| Høie Invest AS | Financial services | 2014 |
| I J. Aursland AS | Wholesale & retail | 2010 |
| Ideko Skilt Og Reklame AS | Professional & scientific | 1995 |
| Idev AS | Information & communication | 2012 |
| Ikt Data AS | Information & communication | 2016 |
| Industrigaten 2 AS | Real estate | 1923 |
| Infogym AS | Information & communication | 2016 |
| Inform AS | Hospitality | 2026 |
| Inform Holding AS | | 2026 |
| Innovasjonshuset Eiendom AS | Real estate | 2016 |
| Investment Migration Insider AS | Professional & scientific | 2019 |
| J-Dekk AS | Wholesale & retail | 2025 |
| JGH Eiendom AS | Real estate | 2006 |
| JGH Holding AS | Real estate | 2005 |
| JH2 Eiendom AS | Real estate | 2021 |
| Jone Gustavsen AS | Arts & recreation | 2019 |
| Jordbærpikene Oasen Haugesund AS | Hospitality | 2019 |
| Jsem AS | Real estate | 2018 |
| Kah Kapital AS | | 2025 |
| Kallevik Holding AS | Real estate | 2013 |
| Kands Import Ans | Wholesale & retail | 1995 |
| Kari Pedersen AS | Wholesale & retail | 2014 |
| Karmsund Dyrehospital AS | Professional & scientific | 2011 |
| Karmsund Eiendom AS | Real estate | 1990 |
| Karmsundgaten 63 AS | Real estate | 2009 |
| Karmsundgaten Utleie AS | Real estate | 2008 |
| Karmøy Næringsfond AS | Public administration | 2018 |
| Kat Kapital AS | | 2025 |
| Kid Holding AS | Real estate | 2017 |
| Kilengaten 18 AS | Real estate | 1998 |
| Kilengaten 18B AS | Real estate | 2005 |
| Klar Kompetanse AS | Information & communication | 2018 |
| Klompelompe AS | Wholesale & retail | 2016 |
| Kmu Invest AS | | 2021 |
| KP Tomt 2 AS | Real estate | 2019 |
| Krutvik Holding AS | | 2025 |
| KST Metall AS | Manufacturing | 2008 |
| Kvikkfiks Oasen AS | Other services | 2017 |
| Kvinnesland AS | Financial services | 2003 |
| Lasertrykkeriet AS | Professional & scientific | 2026 |
| Leif T Færaas AS | Construction | 1987 |
| Lensit.No AS | Wholesale & retail | 1991 |
| Lervik Zoo AS | Wholesale & retail | 2014 |
| Lisell Holding AS | Real estate | 2011 |
| Livsverk Arkitektur AS | Professional & scientific | 2023 |
| Longfield & Super Skeleton AS | Arts & recreation | 2023 |
| Lygrepollen Hytter AS | Real estate | 2017 |
| Lygrepollen Invest AS | Real estate | 2017 |
| Majoren Eiendom AS | Real estate | 2020 |
| Majoren Holding AS | Real estate | 2020 |
| Makula AS | Information & communication | 2023 |
| Mana K. Holding AS | | 2026 |
| Markmaster AS | Manufacturing | 1998 |
| Marø Elektronikk AS | Wholesale & retail | 2024 |
| Matt K. W. Holding AS | Construction | 2005 |
| Matt K. W. Prosjekt AS | Professional & scientific | 2017 |
| Matt Kinwil AS | Real estate | 1999 |
| Medico International AS | Health & social care | 2006 |
| Merkesvik Transport AS | Transport & logistics | 2021 |
| MKW AS | Wholesale & retail | 2014 |
| Motebe Holding AS | | 2020 |
| MPS Bilskade Haugesund AS | Other services | 2016 |
| Møbelconsult Norge AS | Wholesale & retail | 2017 |
| N.V Invest II AS | | 2022 |
| Nautisk Tjeneste AS | Other services | 2025 |
| Nba Invest AS | | 2020 |
| Netstruct AS | Information & communication | 2025 |
| Nilsen & Scheel Kiropraktikksenter AS | Health & social care | 2016 |
| NITTEN90 AS | Information & communication | 2020 |
| NK Investering AS | | 2026 |
| Norcon AS | Professional & scientific | 1997 |
| Nord-Lys Haugesund AS | Information & communication | 2023 |
| Nord-Motor AS | Other services | 1978 |
| Nord-Motor Eiendom AS | Real estate | 2018 |
| Nordbussen AS | Transport & logistics | 2013 |
| Nordheat AS | Real estate | 2011 |
| Nordic 3 AS | Information & communication | 2024 |
| Nordlys Trading AS | Wholesale & retail | 2011 |
| Nordvegen Maskin AS | Wholesale & retail | 2025 |
| Nordviks Regnskapskontor AS | | 2020 |
| Norelco Elektro AS | Construction | 2003 |
| Noreno AS | | 2021 |
| Norevegen 10 AS | Real estate | 2005 |
| Norevegen 12 AS | Real estate | 1997 |