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| Dann Consulting Da | Rælingen | 2025 |
| Dans & Ballett Holding AS | Sandvika | 2021 |
| DANS1 AS | Oslo | 2017 |
| Danseakademi AS | Lillehammer | 2026 |
| Danseglede AS | Mandal | 2024 |
| Dansehagen Åpen Barnehage AS | Stavanger | 2015 |
| Dansekraft AS | Kristiansund N | 2024 |
| Danseløvene AS | Oslo | 2009 |
| Dansesonen Tiril Andøl Dansestudio AS | Vollen | 2013 |
| Dansestudioet Studio Dynamica Da | Drøbak | 2011 |
| Danseverkstedet Førde AS | Førde | 2026 |
| Dark Space Studio AS | Oslo | 2017 |
| Dashing AS | Sola | 2021 |
| Datapower Skole AS | Steinkjer | 2021 |
| Datapower Skoledrift AS | Steinkjer | 2025 |
| Datarommet AS | Harstad | 2018 |
| Datawaves AS | Ulsteinvik | 2013 |
| Datsja AS | Leira I Valdres | 2015 |
| Davas AS | Tana | 2021 |
| David Martinez AS | Fyllingsdalen | 2011 |
| Davinas AS | Oslo | 2012 |
| Davvi Division AS | Kautokeino | 2021 |
| Daycamp Da | Hagan | 2006 |
| DDD Dansestudio AS | Tvedestrand | 2005 |
| De Ni Musene AS | Oslo | 2016 |
| Deakin University | Ph28Ra Perth | 2017 |
| Debio Marked AS | Bjørkelangen | 2015 |
| Decidetowin AS | Moss | 1974 |
| Decisionnodes AS | Asker | 2015 |
| Deep Education Entertainment Partners AS | Oslo | 2021 |
| Deep Fantasea Dive Center Ans | Duken | 1998 |
| Deeply Safe AS | Rognan | 2021 |
| DEFENCE4ALL - Kurs I Selvforsvar AS | Oslo | 2016 |
| Deg Og Jobb AS | Kristiansand S | 2022 |
| Degerstrøm AS | Vadsø | 2021 |
| Deila AS | Porsgrunn | 2021 |
| Delenitor Norge AS | Oslo | 2020 |
| Delfin SK AS | Skien | 2017 |
| Delfinen Svømmeskole AS | Kleppe | 2012 |
| Delta Aktivt AS | Ålesund | 2013 |
| Delta Kommunale Tjenester AS | Askim | 2017 |
| Delta Læringsglede AS | Oslo | 2024 |
| Delta Rogaland AS | Stavanger | 2019 |
| Delta Sports Management AS | Oslo | 2015 |
| Delta Trafikkskole AS | Drammen | 2024 |
| Demba Oslo AS | Oslo | 2019 |
| Demoe AS | Trondheim | 1998 |
| Den Gang Da AS | Drammen | 2019 |
| Den Lykkelige Rype AS | Tessanden | 2018 |
| Den Norske Ballettskole & Akademi AS | Oslo | 2008 |
| Den Norske Ballettskole Bærum AS | Hosle | 2018 |
| Den Norske Ballettskole Valdres AS | Bagn | 2020 |
| Den Norske Skolen I Albir | Es-03581 Albir, Alicante | 2022 |
| Den Norske Skolen I Brussel | Be-1410 Waterloo | 2013 |
| Den Norske Skolen, Malaga | Es-29631 Arroyo De La Miel | 2015 |
| Den Nye Trafikkskolen AS | Skien | 2016 |
| Den Skandinaviske Naprapathøyskolen Norsk Avdeling Av Utenlandsk Foretak Nuf | Sandnes | 2001 |
| Den Tysk-Norske Barnehagen I Oslo AS | Oslo | 2022 |
| Dentanet Norge Nuf | Dk-2900 Hellerup | 2020 |
| Design by Rebekka Slettebø AS | Nærbø | 2023 |
| Designinstituttet AS | Oslo | 2004 |
| Desiree Andersen AS | Tjøme | 2017 |
| Det Gode Arbeidsliv AS | Oslo | 2015 |
| Det Tverrfaglige Kunstinstitutt AS | Fornebu | 2005 |
| Deva Yoga Institute AS | Molde | 2014 |
| Dfa AS | Sofiemyr | 2019 |
| DFD Holding AS | Trondheim | 2022 |
| DG Invest AS | Vormsund | 2008 |
| DHT AS | Sandsli | 2025 |
| Diagnostic Ultrasound Norway AS | Bergen | 2021 |
| Diakonhjemmet Barnehage Borgenveien AS | Oslo | 2022 |
| Diakonhjemmet Barnehage Steinerud AS | Oslo | 2022 |
| Dialektordboka Ans | Bergen | 2022 |
| Dialog Foss AS | Ulset | 2018 |
| Dialoger AS | Tromsø | 2015 |
| Dialogisk Kompetanse AS | Tromsø | 2017 |
| Dialogskills AS | Bergen | 2026 |
| Diamanten 9 AS | Heimdal | 1986 |
| Dibber AS | Jessheim | 2012 |
| Dibber India AS | Jessheim | 2019 |
| Dibe AS | Oslo | 2006 |
| Didaktronikk AS | Vikhammer | 2022 |
| Diggit AS | Oslo | 2017 |
| Digiped AS | Finstadjordet | 2018 |
| Digital Heads AS | Oslo | 2014 |
| Digital Medicine MSK AS | Bodø | 2020 |
| Digital Service AS | Oslo | 2022 |
| Digital Utvikling Nuf | Kvaløysletta | 2009 |
| Dike Metodehus AS | Kløfta | 2026 |
| Din Bærekraft AS | Vormedal | 2022 |
| Din Endring AS | Sandvika | 2021 |
| Din Helse Fagskole AS | Oslo | 2025 |
| Din Helse Norge AS | Oslo | 2006 |
| Din Hvile AS | Horten | 2021 |
| Din Jobbveileder AS | Sørumsand | 2024 |
| Din Kjøreskole AS | Drammen | 1988 |
| Din Kompetanse AS | Larvik | 2022 |
| Din Kompetanse Fagskole AS | Larvik | 2018 |
| Din Konsulent AS | Skjetten | 2018 |