| Deep Sea Supply Lauban II Ltd | Skudeneshavn | 2023 |
| Deep Sea Supply Management (Malaysia) SDN. BHD. | Skudeneshavn | 2023 |
| Deep Value Driller Ltd | Mt-1250 Msida | 2023 |
| Deep Water Services AS | Sogndal | 2020 |
| Deep Water Tooling AS | Sogndal | 2021 |
| Deepak Fertilisers & Petrochemicals Corporation Limited | In-Pune - 411 036 | 2025 |
| Deepocean Pty Ltd | Au-Western Australia 6017 | 2026 |
| Deepocean Shipping AS | Haugesund | 1997 |
| Deepocean Us LLC | Tx 77073 Houston | 2023 |
| Defence Consulting Da | Kopervik | 1999 |
| Defendor Security AS | Oslo | 2022 |
| Defendor Service AS | Oslo | 2026 |
| Defi Invest AS | Oslo | 2021 |
| Defloat Austevoll AS | Ålesund | 2019 |
| Dehli Inkasso AS | Steinkjer | 2014 |
| Dehlsell AS | Mo I Rana | 2024 |
| Dekketøy AS | Randaberg | 2013 |
| Dekketøy Utleie AS | Laksevåg | 2026 |
| Dekkinvest AS | Bremnes | 2022 |
| Dekklaget AS | Tønsberg | 2023 |
| Deko & Display Ans | Tromsø | 2001 |
| Delebekk AS | Slidre | 2023 |
| Delivery Hero | De-10117 Berlin | 2024 |
| Dell Financial Services International Ireland Designated Activity Company | Ie-Dublin 18 | 2026 |
| Deloitte & Touche OY | Fi-00180 Helsinki | 2017 |
| Deloitte Consulting B.V. | 1081La Amsterdam | 2015 |
| Deloitte Ireland LLP | D02 Ay28 Dublin 2 | 2024 |
| Delphie Consulting Ans | Kvernaland | 1999 |
| Delpro | Dk-6580 Vamdrup | 2010 |
| Delsbekk Invest AS | Drammen | 2007 |
| Delta Air Lines, Inc. Nuf | Oslo | 1995 |
| Delta Corp Ship Management Dmcco | Ae- Dubai | 2022 |
| Delta Inkasso AS | Trondheim | 2014 |
| Delta Marine Crewing B.V. | 4382Za Vlissingen | 2022 |
| Delta Multiservice AS | Lier | 2020 |
| Delta Norge AS | Sjøvegan | 1994 |
| Delta Security AS | Trondheim | 2012 |
| Deltron Corporation | Oslo | 2008 |
| Deluxecare Aps | Dk-2765 Smørum | 2024 |
| Dema Cars AS | Elnesvågen | 2018 |
| Demcom AS | Rælingen | 2016 |
| Deme Environmental NV | Be-2070 Zwijndrecht | 2013 |
| Demomesser AS | Oslo | 2016 |
| Den Dagen AS | Spikkestad | 2023 |
| Den Flyvende Tallerken AS | Oslo | 1991 |
| Den Gamle Vaktmesteren AS | Oslo | 2020 |
| Den Glade Gribb Ans | Halden | 1994 |
| Den Gode Hjelper AS | Oslo | 2026 |
| Den Grønn Vask Ans | Tromsø | 2022 |
| Den Grønne Vask AS | Krokelvdalen | 2025 |
| Den Langsomme Reisen AS | Oslo | 2021 |
| Den Lokale Hjelper AS | Nesoddtangen | 2022 |
| Deneco SP. Z O.O. Nuf | Pl-80-955 Gdansk | 2018 |
| Dentalutleie AS | Solbergelva | 2018 |
| Dentfriends AS | Oslo | 2025 |
| Dep-Holding AS | Oslo | 2025 |
| Depart AS | Fredrikstad | 2026 |
| Depona AS | Oslo | 2008 |
| Der Borte Ans | Aukra | 2023 |
| Deringenskulletru AS | Dokka | 2018 |
| Dertour Nordic AB Nuf | Oslo | 1998 |
| Dervola Adventure AS | Skjervøy | 2023 |
| Descent Tools AS | Trondheim | 2023 |
| Descobre O Artico AS | Longyearbyen | 2024 |
| Desert Candles AS | Dal | 2015 |
| Design Group Staffing Inc. | Ca-T2P 3T6 Calgary, Ab | 2017 |
| Design Letters Aps | Dk-2000 Frederiksberg | 2022 |
| Designated Agent 01 Nuf | London Southgate 146Qh England | 2006 |
| Designaweb | 106Ics Amsterdam | 2007 |
| Designed by Aps | Oslo | 2013 |
| Designfire Holding AS | Saltnes | 2019 |
| Dess BTG Labuan Ltd | Skudeneshavn | 2023 |
| Desta AS | Holter | 2012 |
| Destek AS | Sandnes | 2022 |
| Destinasjon 71 Grader Nord AS | Honningsvåg | 2022 |
| Destinasjon 71 Grader Nord Holding AS | Honningsvåg | 2022 |
| Destinasjon Asker Og Bærum Da | Hvalstad | 2010 |
| Destinasjon Femund Engerdal AS | Engerdal | 2000 |
| Destinasjon Finse AS | Finse | 2017 |
| Destinasjon Fredrikstad AS | Kråkerøy | 2024 |
| Destinasjon Haugesund & Haugalandet AS | Haugesund | 2006 |
| Destinasjon Hovden AS | Hovden I Setesdal | 1985 |
| Destinasjon Kokelv AS | Kokelv | 2021 |
| Destinasjon Skeikampen AS | Svingvoll | 2022 |
| Destinasjon Sørøya SA | Hasvik | 2023 |
| Destinasjon Trysil SA | Trysil | 2006 |
| Destinasjon Vollen AS | Vollen | 2014 |
| Destinate AS | Stryn | 2016 |
| Destination Africa AS | Oslo | 2023 |
| Destination Herand AS | Lommedalen | 2023 |
| Destination Lofoten & Vesterålen AS | Stokmarknes | 2023 |
| Destination Lofoten AS | Svolvær | 1992 |
| Destination Setesdal AS | Evje | 2004 |
| Destination Tromso AS | Tromsø | 2014 |
| Destination Tromsø AS | Øverbygd | 2007 |
| Desurvey Ireland Limited | Ie-Dublin 2 | 2022 |
| Det Dekkede Bord Ans | Strømmen | 2005 |
| Det Lille Extra AS | Bergen | 2023 |
| Det Lille Frøpakkeriet Da | Sandefjord | 2011 |
| Det Norske Renholdsbyrå AS | Oslo | 2005 |