| Dakmed AS | Mo I Rana | 1991 |
| Dala Fysioterapi & Løpsklinikk Ans | Brumunddal | 2019 |
| Dalangården Kiropraktorklinikk AS | Kristiansand S | 2013 |
| Daldorff Tannhelseklinikk AS | Kirkenes | 1994 |
| Dalen Legesenter Da | Fyllingsdalen | 1995 |
| Dalgård Legesenter Da | Trondheim | 2009 |
| Dalgård Legetjenester AS | Rådal | 2026 |
| Dalima AS | Sandnes | 2025 |
| Daliri Healthcare AS | Oslo | 2023 |
| Daliri Holding AS | Oslo | 2022 |
| Dalpro Holding AS | Melandsjø | 2020 |
| Dalsgrenda Eldresenter SA | Dalsgrenda | 1990 |
| Damedoktor AS | Oslo | 2016 |
| Damhaug Drift AS | Oslo | 2026 |
| Dampen-Steinkjer AS | Steinkjer | 2022 |
| Damplass Tannlege AS | Oslo | 2026 |
| Damplass Tannlegekontor AS | Oslo | 2026 |
| Damplassen AS | Oslo | 2015 |
| Damsgård Tannlegesenter AS | Ulset | 2015 |
| Dan M Norager AS | Oslo | 2021 |
| Dan Nguyen Lege AS | Oslo | 2020 |
| Dana B. Stene Psykologspesialist AS | Oslo | 2023 |
| Danco Holding AS | Kristiansand S | 2015 |
| Dandela AS | Oslo | 2025 |
| Daniel Ekeberg AS | Bjørkelangen | 2014 |
| Danmarksplass Kiropraktorklinikk AS | Bergen | 2007 |
| Danmarksplass Legesenter AS | Bergen | 2022 |
| Danmarksplass Tannhelsesenter AS | Bergen | 2023 |
| Danmarksplass Tannregulering AS | Bergen | 2023 |
| Danmo Holding AS | Stord | 2020 |
| Dano Holding AS | Mo I Rana | 2021 |
| Dansk Børnefond | Dk-2840 Holte | 2018 |
| Dantann AS | Lillehammer | 2019 |
| Danwo AS | Namsos | 2017 |
| Danzig AS | Oslo | 2016 |
| Dapmot AS | Hammerfest | 2022 |
| Darias Invest AS | Drammen | 2024 |
| Das Trading and Consulting AB Nuf | Voss | 2023 |
| Datter AS | Mehamn | 2025 |
| David Sand - Naprapati Og Rehab AS | Kristiansand S | 2022 |
| Davik Fysioterapi AS | Davik | 2012 |
| Davis Medical AS | Vikeså | 2025 |
| Dawat-E-Hadiyah Trust (United Kingdom) Nuf | Northolt Ub5 6Ag | 2025 |
| Dawe AS | Rena | 2022 |
| Daytona AS | Asker | 2020 |
| Dbhs Holding AS | Sylling | 2023 |
| DBR Gruppen Norge AS | Hosle | 2014 |
| Dci Tannpleie AS | Namsos | 2026 |
| Dco Eiendom AS | Kapp | 2021 |
| DD DD AS | Tiller | 2013 |
| De Boer Holding AS | Drøbak | 2016 |
| De Brukerstyrte Hus AS | Bergen | 2022 |
| De Holistiske Psykologene AS | Elverum | 2025 |
| De Korte Holding AS | Lier | 2023 |
| De Lange Legesenter AS | Oslo | 2025 |
| De Si Invest AS | Drammen | 2018 |
| Decenium AS | Høvik | 2013 |
| Decker Holding AS | Oslo | 2022 |
| Decon-X International AS | Lysaker | 2006 |
| Dede Klinikk AS | Sandnes | 2012 |
| Dedi Holding AS | Oslo | 2024 |
| Dedicare Omsorg AS | Stjørdal | 2025 |
| Deep Connections AS | Trondheim | 2019 |
| Deepx Analytics AS | Bergen | 2017 |
| Degerdal Legetjenester AS | Sarpsborg | 2017 |
| Delecto Arbeidsinkludering AS | Kragerø | 2021 |
| Delecto Kompetanse AS | Kragerø | 2002 |
| Delffi AS | Ski | 2022 |
| Delphi Holding AS | Hamar | 2023 |
| Delta Invest Holding AS | Drammen | 2021 |
| Delta Jobb Og Kompetanse AS | Askim | 2017 |
| Delta Næring AS | Askim | 2017 |
| Delta Ortopediske Senter | Vøyenenga | 2018 |
| Deltagruppen AS | Askim | 2017 |
| Deltaklinikken AS | Tananger | 2006 |
| Deluca Eye AS | Elverum | 2024 |
| DEMENSHJELP1 AS | Sandvika | 2018 |
| Demensomsorg AS | Fjellstrand | 2024 |
| Demp AS | Lier | 2012 |
| Den Gode Rygg AS | Oslo | 2008 |
| Den Hjertelige Samtalen Nuf | Steinberg | 2023 |
| Den Lille Hjelperen AS | Moss | 2003 |
| Den Mobile Tannklinikk AS | Hammerfest | 2022 |
| Den Skreddersydde Enhet AS | Arendal | 2014 |
| Den Skreddersydde Enhet Holding AS | Arendal | 2021 |
| Denso AS | Drammen | 2009 |
| Denta Tannklinikk AS | Sandefjord | 2022 |
| Dental & Dermal House AS | Oslo | 2019 |
| Dental Bona Fide AS | Hamar | 2013 |
| Dental Breivik AS | Asker | 2025 |
| Dental Health Care AS | Oslo | 2014 |
| Dental Keram AS | Nesodden | 2006 |
| Dental Norco I AS | Oslo | 2016 |
| Dental Norge AS | Kristiansand S | 2012 |
| Dental Norge Forus AS | Sandnes | 2014 |
| Dental Radiologi AS | Oslo | 2020 |
| Dental Specter AS | Oslo | 2018 |
| Dental Studio AS | Oslo | 2020 |
| Dental Studio Lørenskog Tannklinikk AS | Lørenskog | 2024 |
| Dentalcity Ski AS | Ski | 2022 |