| Design-Hus Bolig AS | Construction | 2017 |
| Designa Haugesund AS | Wholesale & retail | 2010 |
| Destia AS | Construction | 2015 |
| Destinasjon Haugesund & Haugalandet AS | Administrative & support | 2006 |
| Devs AS | Information & communication | 2020 |
| DGM Invest AS | Real estate | 1991 |
| DH Interiør AS | Wholesale & retail | 2023 |
| DH Prosjekt AS | Construction | 2023 |
| Digel Records Da | Information & communication | 2004 |
| Diggin Foodtruck AS | Hospitality | 2016 |
| Digirør AS | Construction | 2021 |
| Digit Nord AS | Professional & scientific | 2019 |
| Digital Fokus AS | Professional & scientific | 2021 |
| Dikterveien Eiendom AS | Real estate | 2000 |
| Direkte Kontakt Da | Information & communication | 1999 |
| Ditt Miljø AS | Construction | 2017 |
| Ditt Regnskap AS | Professional & scientific | 1992 |
| Divida AS | Real estate | 2012 |
| Divisi AS | Hospitality | 2014 |
| Divot Holding AS | Real estate | 2014 |
| DJ Haugesund AS | Wholesale & retail | 2023 |
| Djupaskarveien 38 AS | Real estate | 1991 |
| DND Transport AS | Transport & logistics | 2024 |
| DNK AS | | 2024 |
| DOCK1 AS | Hospitality | 2026 |
| Doga AS | | 2023 |
| Doge Norway AS | Wholesale & retail | 2021 |
| Dokkodo AS | Information & communication | 2021 |
| Dorado AS | Real estate | 1999 |
| Dottylove AS | Professional & scientific | 2024 |
| Dovedale Intern Shipping SA | | 1997 |
| DPC Holding AS | Wholesale & retail | 2005 |
| DPC Spedisjon AS | Transport & logistics | 2008 |
| DR Mulligan AS | Arts & recreation | 2016 |
| DR. Bratlie AS | Health & social care | 2024 |
| DR. Bøgesvang AS | Health & social care | 2015 |
| DR. Dahlgren AS | Health & social care | 2024 |
| Dragehaugen a AS | | 2018 |
| Dragehaugen B AS | Other services | 2018 |
| Dragehaugen Drift AS | Other services | 2016 |
| Dragehaugen Verdi AS | Financial services | 2016 |
| Dragon Yard AS | Manufacturing | 1998 |
| Draken Harald Hårfagre AS | Transport & logistics | 2000 |
| Dreiergaarden AS | Real estate | 2022 |
| Drive-It AS | Education | 2017 |
| Drop - in Shop Ans | Wholesale & retail | 1988 |
| DSV Invest AS | Real estate | 2024 |
| Ductu Organisasjonsutvikling AS | Professional & scientific | 2025 |
| Dueland Bilservice AS | Other services | 2020 |
| Dueland Eiendom AS | Real estate | 2010 |
| Dul Sel AS | Real estate | 2017 |
| Dunkley Design AS | Wholesale & retail | 1998 |
| DX Holding AS | Financial services | 2017 |
| Dyb Holding AS | | 2021 |
| Dybdahl Betong & Riveservice AS | Construction | 2005 |
| Dynamik Management AS | Information & communication | 2017 |
| Dynamik Software Lab AS | Information & communication | 2021 |
| Dypvest AS | Agriculture & fishing | 2022 |
| Dyrland Hansen & Hauge Da | Hospitality | 2003 |
| Dagmar Eriksen Eft ANS | | 1988 |
| Døving Invest AS | Financial services | 2012 |
| E H Kongshavn AS | Transport & logistics | 1956 |
| E Jacobsen Eiendom AS | Real estate | 2020 |
| E Jacobsen Tekstil AS | Wholesale & retail | 2020 |
| E.E. Eiendom Og Vedlikehold AS | Real estate | 2022 |
| Easypeasy AS | Real estate | 2020 |
| Ebk Agent AS | Professional & scientific | 2011 |
| Ebl Eiendom AS | Construction | 2022 |
| Eci Eiendom AS | Real estate | 2024 |
| Economio AS | Information & communication | 2017 |
| Ecount Eiendom AS | Real estate | 2020 |
| Edda Accommodation Holding AS | Administrative & support | 2012 |
| Edda Accommodation Norway AS | Administrative & support | 2012 |
| Edda Bygg AS | Construction | 2008 |
| Edda Fjord AS | Administrative & support | 2024 |
| Edda Haugesund AS | Real estate | 2016 |
| Edj Investering AS | | 2024 |
| Egenberg Holding AS | | 2019 |
| Egil Næsheims Rederi AS | Transport & logistics | 1963 |
| Ego Hårstudio Solvang AS | Other services | 2022 |
| Egon Haugesund AS | Hospitality | 1990 |
| Eh Up Holding AS | Professional & scientific | 2018 |
| Ehh Invest AS | Financial services | 2005 |
| Ehs Ventures AS | | 2024 |
| Eide Offshore Consulting AS | Professional & scientific | 2020 |
| Eiendom Haugesund AS | Real estate | 2016 |
| Eiendom Og Prosjektutvikling AS | Real estate | 1995 |
| Eiendomsmegler a AS | Real estate | 2009 |
| Eiendomsutvikling AS Haugesund | Real estate | 1988 |
| Eikesdal Administrasjon AS | Administrative & support | 2011 |
| Eiknes Frisør AS | Other services | 2009 |
| Eilef Stange Holding AS | Professional & scientific | 2024 |
| Eilerås Maskin AS | Construction | 2011 |
| Einar Ljosnes AS | Manufacturing | 2013 |
| Einskatt AS | Financial services | 2005 |
| Eivind Kallevik AS | Professional & scientific | 2021 |
| Eivindsvegen 3 AS | Real estate | 2019 |
| Ejla Invest AS | Financial services | 2005 |
| Ekersholm Subsea AS | Manufacturing | 2021 |
| Ekornsæters Blomsterforretning AS | Wholesale & retail | 2010 |