| Dansk Procesmontage | Dk-8600 Silkeborg | 2011 |
| Dansk Sprinkler Teknik | Ytre Enebakk | 2013 |
| Dansk Stillads Service | Dk-2650 Hvidovre | 2013 |
| Dansk Total Montage | Oslo | 2011 |
| Dansk Tømrer Bygg Ivs | 8930 Randers | 2017 |
| Dansk Wilton | Dk-7400 Herning | 1999 |
| Dansken AS | Skien | 2023 |
| Danstoker | Dk-7400 Herning | 2014 |
| Dantor Holding AS | Skien | 2014 |
| Danus Et Digitus Invest AS | Førresfjorden | 2022 |
| Danuta Biedna - Przedsiebiorstwo Transportowo-Handlowe | 863-110 Tczew | 2006 |
| Danvan | Dk-5220 Odense Sø | 2021 |
| Dar&B AS | Hommersåk | 2017 |
| Daras Bygg AS | Maura | 2025 |
| Darek AS | Sollihøgda | 2006 |
| Darek Sowa Rehabilitering AS | Vettre | 2009 |
| Dareks Maling AS | Oslo | 2016 |
| Darex Dariusz Tokarz Nuf | 22-304 Siennica Rozana | 2005 |
| Darihus Byggservice AS | Rådal | 2018 |
| Darinda | Lt-6341 Alytus | 2019 |
| Dario Dariusz Wlodzimiers Forysiuk | Oslo | 2005 |
| Darius Bygg Og Anlegg AS | Frolands Verk | 2025 |
| Darius Warachowski - Usl Budowlane | 84-200 Wyczechy | 2006 |
| Dariusz Investment Holding AS | Geithus | 2022 |
| Dariusz Krzesniak | 98-1 Zdunska Wola | 2007 |
| Dariusz Lukasiak Bygningshåndverker | 82 550 Prabuty | 2005 |
| Dariusz Marcin Bak | 33-330 Grybow | 2007 |
| Dariusz Minga | Grålum | 2007 |
| Dariusz Mroz | 07-210 Dlugsiodlo | 2005 |
| Dariusz Oberc | Sylling | 2005 |
| Dariusz Slaciak Dar | 41-400 Mysloawice | 2007 |
| Dariusz Stefaniak Stef | 78-120 Goscino | 2007 |
| Dariusz Werwchowski | 84-200 Lebork | 2007 |
| Dariusz Zawisza | Pl 39-103 Ostrow | 2021 |
| Dariusz Zieciak Dar | 82-103 Stegna | 2006 |
| Daro Bygg AS | Oslo | 2026 |
| Darom Bygg AS | Lierstranda | 2024 |
| Dasotec Service SRL Nuf | It-35031 Abano Terme | 2025 |
| Data Set Instal AS | Oslo | 2024 |
| DATA Site ANS | Oslo | 1988 |
| Datalec Precision Installations AS | Moss | 2018 |
| Datek Holding AS | Oslo | 2015 |
| Datek Installasjon AS | Oslo | 2015 |
| Datelco AS | Oslo | 1993 |
| Davai Aps | Dk-8500 Grenaa | 2018 |
| Davai Bridge & Tunnel Norge AS | Stord | 2025 |
| Davai Bridge & Tunnel Nuf | Dk-8500 Grenaa | 2023 |
| David Bygg AS | Nærsnes | 1995 |
| David Holand Anlegg AS | Egersund | 2025 |
| David Holand Holding AS | Egersund | 2013 |
| David Rugås Håndverktjenester AS | Slemmestad | 2010 |
| Davidsen Multiservice AS | Namsos | 2026 |
| Davinor Bygg AS | Åros | 2025 |
| Davo Pawel Heleniak | Pl-33-100 Tarnow | 2016 |
| Dawid Bryk Dawid | 80 - 807 Gdansk | 2008 |
| Dawid Drzyzga | 27-400 Swietokrzyce | 2007 |
| Dawids Byggtjeneste AS | Skotterud | 2013 |
| Dawson Contract Piling Limited | Buckinghamshire Mk6 1Ne | 2013 |
| DB Bygg & Montasje AS | Skien | 2017 |
| DB Bygg AS | Spydeberg | 2018 |
| DB Bygg Dirk Bödow AS | Aure | 2026 |
| DB Energy AS | Randaberg | 2019 |
| DB Håndverker AS | Hokksund | 2024 |
| DB Norge AS | Oslo | 2012 |
| DB Snekker Og Maler AS | Brumunddal | 2022 |
| DB Tømrer AS | Rykkinn | 2021 |
| DBL Building Sia | Lv-3430 Grobina | 2024 |
| DBM Holding AS | Rådal | 2019 |
| DBS Invest AS | Trondheim | 2014 |
| Dbygg AS | Roa | 2013 |
| DC Bygg & Consult AS | Kristiansand S | 2018 |
| DC Bygg AS | Trøgstad | 2020 |
| DC Bygg Service AS | Tretten | 2022 |
| DC Networks AS | Hokksund | 2012 |
| Dc-Datacenter-Group GmbH Nuf | De-57584 Wallmenroth | 2025 |
| Dci Norway AS | Grovfjord | 2022 |
| DCN Diving B.V. Norway | 4612Pl Bergen Op Zoom | 2023 |
| DCS Norway AS | Oslo | 2021 |
| DD Bad Og Bygg AS | Lørenskog | 2022 |
| DD Fire Solutions AS | Hell | 2022 |
| Dde Håndverk AS | Sandefjord | 2017 |
| De Bygg AS | Sandefjord | 2021 |
| De Elektro AS | Oslo | 2005 |
| De Flon Montasje AS | Grålum | 2024 |
| De Jonge Bygg & Snekkerservice AS | Fana | 2022 |
| De Lange AS | Stavanger | 2022 |
| De Lilla AS | Oslo | 2006 |
| De Rørleggerservice AS | Sævareid | 2004 |
| De Tre Tømrerne Nuf | Sandvika | 2008 |
| De Troy 1911 Olgierd Jerzy Kuzniar | 41-200 So Snowiel | 2008 |
| Dea Invest AS | Tranby | 2005 |
| Dealan Spolka Z Ograniczona Odpowiedzialnoscia Nuf | 66-400 Gorzow Wielkopolski | 2025 |
| Dean Tinsley Limited Nuf | Chelmsford Cm1 2Hw | 2015 |
| Deane Roofing and Cladding Nuf | Northampton Nn4 7Xd | 2026 |
| Deane Roofing Systems Nuf | Ie-Kilkelly, Co. Mayo F35 W889 | 2026 |
| Debes Maskin AS | Løfallstrand | 2016 |
| Decan Sports Equipment | 50410 Cuarte De Huerva, Zaragoza | 2021 |
| Decenter AS | Skarnes | 2012 |
| Deco Eiendom AS | Reine | 2015 |
| Deco Norge AS | Reine | 2015 |