| Damsgård Industrier AS | Oslo | 2023 |
| Damsleth Skilt & Reklame AS | Torp | 1990 |
| Dan-Holding AS | Sirevåg | 2015 |
| Dan-Team Stainless Aps | Dk-6093 Sjølund | 2004 |
| Dan-Tek Energy Aps Nuf | Dk-9550 Mariager | 2026 |
| Dana Bakeri AS | Oslo | 2020 |
| Danaher UK Industries Ltd | Ss143Ba Essex | 2006 |
| Danatech | 8700 Horsens | 2015 |
| Danelec Norway AS | Bergen | 1995 |
| Danfo AB | Se-713 23 Nora | 2015 |
| Dango & Dienenthal Maschinenbau GmbH | De-57072 Siegen | 2024 |
| Danica Foods AS | Haugesund | 1993 |
| Daniel Bjerland Invest AS | Mosby | 2018 |
| Daniel Gutt | Pl-34-425 Bialy Dunajec | 2024 |
| Danieli & C. Officine Meccaniche S.P.A. | It-Buttrio (Ud) 33042 | 2021 |
| Danieli UK Holding Limited | Rotherham, South Yorkshire, S60 5Aa | 2020 |
| Danish Crane Building | Dk-9240 Nibe | 2014 |
| Danmek AS | Tomter | 1996 |
| Dannevigs Båtbyggeri AS | Arendal | 2026 |
| Danpo | Dk-7323 Give | 2016 |
| Dansk Stålmontage | 5000 Odense C | 2015 |
| Dantek AS | Kristiansund N | 2025 |
| Danvik Ib AS | Drammen | 1993 |
| Danès Perlas Nuf | 91222 Klaipeda | 2014 |
| Dap Solution AS | Ølensvåg | 2018 |
| Dapa Maps AS | Oslo | 2020 |
| Dargan AS | Mjøndalen | 1974 |
| Dargan Invest AS | Mjøndalen | 2005 |
| Darien AS | Oslo | 2018 |
| Dark Department AS | Oslo | 2025 |
| Data Dekor AS | Oslo | 2008 |
| Datalogic S.R.L. Norway | It-40012 Lippo Di Calderara,Bologna | 2026 |
| Datamaster Solutions OY Nuf | Fi-28 130 Pori | 2026 |
| Datatrykk AS | Stavanger | 1996 |
| Datek Løfteteknikk AS | Hagan | 1988 |
| Datek Løfteteknikk Nord AS | Finnsnes | 2023 |
| Datek Løfteteknikk Øst AS | Holmestrand | 2024 |
| Dava Foods Norway AS | Larvik | 1987 |
| Dava Foods Property Norway AS | Larvik | 2007 |
| Davai AS | Tverlandet | 2016 |
| Davi Turbo AS | Leinøy | 2011 |
| David Brown Santasalo Sweden AB | 42 132 Gøteborg | 2015 |
| Davidsen & Thorvaldsen Reklamebyrå Ans | Oslo | 1993 |
| Dawson Energy Ltd | Oban Pa34 4Ata | 2010 |
| Day Corp AS | Oslo | 2016 |
| DB Equipment AS | Oslo | 2011 |
| DB Service AS | Mosby | 2020 |
| Db-Holding AS | Alta | 2018 |
| Dbut Records Ans | Oslo | 1997 |
| DC Coating Norge AS | Lønset | 2000 |
| DC Service AS | Tjøme | 2021 |
| DC Works Finland OY Nuf | Fi-48770 Kotka | 2025 |
| Ddinnredning AS | Hunndalen | 2018 |
| De 3 Søstre AS | Finnøy | 2026 |
| De Gendt Design AS | Hægeland | 2012 |
| De Lysholmske Brenneri- Og Destillasjonsfabrikker Ans | Hagan | 2000 |
| De Små Hus Utvikling AS | Oslo | 2022 |
| De Wilde Slipp Og Mek AS | Bergsfjord | 2011 |
| De Winter Maskinteknikk AS | Venabygd | 2026 |
| Defa AB | Se-26162 Glumslöv | 2018 |
| Defa AS | Nesbyen | 1987 |
| Deimeks Oü | Ee-10314 Tallin, Harjumaa | 2019 |
| Deja Wood AS | Feiring | 2016 |
| Dekaro Print AS | Rakkestad | 2022 |
| Dekker Nordic AS | Oslo | 2017 |
| Dekketre AS | Snartemo | 2017 |
| Dekningsmateriell AS | Arendal | 1999 |
| Deko Holding AS | Ottestad | 2024 |
| Dekor Cut AS | Buvika | 2001 |
| Dekor Og Design AS | Kongsvinger | 2022 |
| Dekorina AS | Ræge | 2024 |
| Delecto Leverer AS | Kragerø | 2026 |
| Delga AS | Frogner | 2024 |
| Delikatessepotet SA | Sel | 2022 |
| Delitek AS | Alsvåg | 1992 |
| Delizia AS | Hafrsfjord | 2018 |
| Delta Contracting AS | Stavanger | 1993 |
| Delta Electronics Ans | Blommenholm | 1985 |
| Delta Elektro AS | Trondheim | 1998 |
| Delta Heat Services B.V | 3251Lz Stellendam | 2017 |
| Delta-P, Pumpe Og Kompressor Systemer AS | Asker | 2006 |
| Deltapump AS | Førresfjorden | 2007 |
| Demanor AS | Sande I Vestfold | 1993 |
| Demas AS | Brøstadbotn | 1989 |
| Den Bittelille Systua AS | Kjeller | 2025 |
| Den Blinde Ku AS | Drammen | 1999 |
| Den Glade Høvel AS | Risør | 2013 |
| Den Gode Baker AS | Stokke | 2004 |
| Den Gode Baker Holding AS | Stokke | 2005 |
| Den Gyldne Bønne AS | Vøyenenga | 1997 |
| Den Hemmelige Pølsefabrikken AS | Valestrandsfossen | 2018 |
| Den Lille Fabrikken AS | Bø I Telemark | 2025 |
| Den Norske Knappefabrik AS | Lillehammer | 1922 |
| Den Norske Kokosbollefabrikken AS | Oslo | 2024 |
| Den Norske Kryddermølle AS | Larvik | 2021 |
| Den Norske Snusfabrikken AS | Våler I Østfold | 2021 |
| Den Røde Tråd AS | Mosjøen | 2017 |
| Den Stolte Hane AS | Nærbø | 1998 |
| Den Stolte Pølsemaker AS | Porsgrunn | 2016 |
| Denkra AS | Kragerø | 2022 |