| Dirgi AS | Blommenholm | 2006 |
| Disab Rental | Se 24123 Eslöv | 2016 |
| Disco Vest Da | Mathopen | 2000 |
| Disco Volante AS | Oslo | 2017 |
| Discover Bergen AS | Bergen | 2025 |
| Discover Group AS | Oslo | 2020 |
| Discover Norway AS | Lillehammer | 1997 |
| Discover People AS | Oslo | 2020 |
| Discover Svalbard AS | Longyearbyen | 2015 |
| Discover the World Limited Nuf | Surrey Rh4 1Hj Dorking | 2016 |
| Discovery Route SA | Sand | 2013 |
| Diskotech Da | Bønes | 2025 |
| Dison Holding AS | Husnes | 2025 |
| Distrikt Utleie AS | Birtavarre | 2024 |
| Ditt Afrika AS | Åsgårdstrand | 2009 |
| Ditt AS | Oslo | 2010 |
| Ditt Borettslag AS | Trondheim | 2011 |
| Ditt Hvaler AS | Skjærhalden | 2016 |
| Ditt Utemiljø AS | Trondheim | 2026 |
| Ditt Utstyr AS | Oslo | 2024 |
| Div Drift AS | Kråkstad | 2021 |
| Divako Eniq AS | Oslo | 2026 |
| Divent AS | Fornebu | 2022 |
| Diverseriet Da | Tydal | 1998 |
| DJ Fasade AS | Oslo | 2026 |
| DJC Holding AS | Vinterbro | 2021 |
| Djupedalen Invest AS | Tromsø | 1998 |
| DK Workers AS | Skjetten | 2021 |
| Dkim 34 Ltd Nuf | N146Qh, London, Southgate | 2011 |
| DKM Invest AS | Kopervik | 2016 |
| DKM Services AS | Kopervik | 2007 |
| DKS Consulting AS | Oslo | 2026 |
| DM Group AS | Ski | 2013 |
| DM Kraft AS | Oslo | 2023 |
| DM Multiservice AS | Heimdal | 2021 |
| DM16 Invest AS | Rakkestad | 2017 |
| Dma International Aps | Dk-2610 Rødovre | 2011 |
| DMC Nordic Norway AS | Bergen | 2009 |
| DMC Oslo AS | Oslo | 2024 |
| DMC Scandi Lights AB | Se-434 99 Kungsbacka | 2023 |
| DMD Renhold Ltd. Nuf | Oslo | 2008 |
| DMG Mori Finance GmbH Nuf | 70794 Filderstadt | 2019 |
| DMV Service AS | Haugsvær | 2013 |
| Dna Kompetanse AS | Oslo | 2007 |
| Dna Oyj | Fi-00620 Helsinki | 2022 |
| Dname Record 60 Ltd Nuf | London Southgate N14 6Qh England | 2025 |
| DNB Bank Polska S.A. | 02-676 Warsaw | 2014 |
| DND AS | Bergen | 2022 |
| DNF Inkasso AS | Oppegård | 1981 |
| Dnhn AS | Andebu | 2024 |
| DNS Resolver 65 Ltd Nuf | London Southgate N14 6Qh England | 2025 |
| Dnskey Record 37 Ltd Nuf | N146Qh, London, Southgate | 2007 |
| Dnssec Deploy 62 Ltd Nuf | London Southgate N14 6Qh England | 2025 |
| Doa Delta Ltd | Warnminister Ba12 9Wh | 2013 |
| Doa Gamma Ltd | Wiltshire Ba12 9Hw | 2014 |
| Dobbelk AS | Stabekk | 2013 |
| Dobloug Mattis AS | Nes På Hedmarken | 2022 |
| Dobloug Utleie AS | Brumunddal | 2021 |
| Dobra Eiendom AS | Klepp Stasjon | 2013 |
| Dobra Praca SP. Z.O.O. Nuf | Klepp Stasjon | 2007 |
| Doc Cable Solutions B.V. | 4382Nm Vlissingen | 2024 |
| Doc Heavy Transport B.V. | 4382Nm Vlissingen | 2024 |
| Dodo AS | Oslo | 2016 |
| Dodois Renhold AS | Trondheim | 2009 |
| Dof Australia Pty Limited Nuf | Perth 6000 Western Austalia | 2025 |
| Dof Subsea Canada Corp. Nuf | A1N 0A4 Newfoundland And Labrador | 2019 |
| Dof Subsea Norway Offshore AS | Bergen | 2017 |
| Dof Subsea Rov AS | Bergen | 2004 |
| Doka GmbH | 3300 Amstetten | 2014 |
| Doka Norge AS | Åros | 1999 |
| Dokk Hyttetjenester Da | Ål | 2019 |
| Dokken Anleggsmaskiner AS | Bagn | 2012 |
| Dokken Drift AS | Mjøndalen | 2026 |
| Dokken Eiendom Og Utleieservice AS | Dokka | 2000 |
| Dolly Invest AS | Trondheim | 2024 |
| Dolphin Drilling Offshore Limited | Hampshire So53 3Lg | 2020 |
| Dolphin Drilling Personnel Pte. Ltd | Sg-039192 Singapore | 2020 |
| Domain Fortress Inc | Wilmington Delaware | 2007 |
| Domain Holding 001 Aps | Dk-1560 København V | 2012 |
| Domain Holding 002 Aps | Dk-1560 København V | 2013 |
| Domain Holding 003 Aps | Dk-1560 København V | 2013 |
| Domain Holding 005 Aps | Dk-1560 København V | 2015 |
| Domain Holding 006 Aps | Dk-1560 København V | 2015 |
| Domain Holding 006 Oü Nuf | Ee-10115 Tallinn | 2026 |
| Domain Holding 007 Aps | Dk-1560 Køøbenhavn V | 2016 |
| Domain Holding 007 Oü Nuf | Ee-10115 Tallinn | 2026 |
| Domain Holding 008 Oü Nuf | Ee-10115 Tallinn | 2026 |
| Domain Holding 009 Aps | Dk-1560 København V | 2017 |
| Domain Holding 009 Oü Nuf | Ee-10115 Tallinn | 2026 |
| Domain Holding 010 Aps | Dk-1560 København V | 2017 |
| Domain Holding 010 Oü Nuf | Ee-10115 Tallinn | 2026 |
| Domain Holding 011 Aps | Dk-1560 København V | 2017 |
| Domain Holding 012 Aps | Dk-1560 København V | 2019 |
| Domain Holding 013 Aps | Dk-1560 Købenghavn V | 2019 |
| Domain Holding 014 Aps | Dk-1560 København V | 2019 |
| Domain Holding 015 Aps | Dk-1560 København V | 2019 |
| Domain Holding 017 Aps | Dk-1560 København V | 2020 |
| Domain Holding 020 Aps | Dk-1560 København V | 2020 |
| Domain Holding 021 Aps | Dk-1560 København V | 2020 |
| Domain Holding 022 Aps | Dk-1560 København V | 2020 |