| Amø Maskin AS | Levanger | 2012 |
| An Bygg AS | Maura | 2011 |
| An Bygg Og Maler AS | Bekkestua | 2019 |
| An Elektro AS | Røyken | 2022 |
| An Gravedrift AS | Hønefoss | 2013 |
| An Komfort Bygg AS | Skedsmokorset | 2015 |
| An Maler AS | Oslo | 2023 |
| An Mur Og Bygg AS | Kløfta | 2022 |
| Anb Projects AS | Kristiansund N | 2024 |
| Anba AS | Frogner | 2021 |
| Anc Prestige Interiors AS | Hønefoss | 2025 |
| Ancor Bygg Ans | Dokka | 2003 |
| And-Hus AS | Andenes | 2010 |
| Andebu Elektro AS | Sandefjord | 2017 |
| Andebu-Eiendom AS | Sandefjord | 2017 |
| Andenæs Rør AS | Bekkestua | 2007 |
| Andenæs VVS AS | Oslo | 1991 |
| Ander AS | Bødalen | 2013 |
| Anders & Frode Bygg AS | Nybergsund | 2011 |
| Anders Dversnes AS | Egersund | 2017 |
| Anders Ekberg Holdning AS | Hvalstad | 2005 |
| Anders Hjelmeland Invest AS | Tertnes | 2019 |
| Anders Hovde AS | Sandvika | 2013 |
| Anders Hunn Graving Og Transport AS | Sellebakk | 2012 |
| Anders Jensen AS | Sandefjord | 1992 |
| Anders Johnsen AS | Oslo | 1980 |
| Anders Johnsen Eiendom AS | Oslo | 2006 |
| Anders Johnsen Holding AS | Oslo | 2005 |
| Anders Karlsen AS | Skjeberg | 2011 |
| Anders Langelandsvik AS | Skjoldastraumen | 2025 |
| Anders Mæland Holding AS | Etne | 2013 |
| Anders O Grevstad AS | Nesttun | 1996 |
| Anders Og Alf Inge Slemmen Ans | Åfarnes | 1994 |
| Anders Poulsen AS | Fetsund | 2022 |
| Anders Smådal AS | Ytre Enebakk | 1989 |
| Anders Stangvik Anlegg AS | Risør | 2018 |
| Anders Stien Holding AS | Oslo | 2024 |
| Anders Stormoen AS | Tynset | 2019 |
| Andersen & Bakke Entreprenørforretning AS | Nøtterøy | 1990 |
| Andersen & Co Ans | Sandnes | 1979 |
| Andersen & Knoph AS | Stokke | 2015 |
| Andersen & Ljosheim Bygg AS | Nesttun | 2012 |
| Andersen & Ljosheim Prosjekt AS | Nesttun | 2021 |
| Andersen & Moen Bygg AS | Hokksund | 2012 |
| Andersen & Skildrud Invest AS | Oslo | 2007 |
| Andersen & Svendsen Ans | Skallestad | 1989 |
| Andersen & Sønn Holding AS | Kleppestø | 2005 |
| Andersen & Sønn Rørleggerforretning AS | Kleppestø | 1986 |
| Andersen Arbeidsdykking AS | Alta | 2018 |
| Andersen Autorisert Rørlegger AS | Åros | 2012 |
| Andersen Bad & Bolig AS | Oslo | 2020 |
| Andersen Bil & Maskin AS | Skotselv | 2026 |
| Andersen Bygg & Vedlikehold AS | Bjorbekk | 2025 |
| Andersen Bygg Og Vedlikehold AS | Vettre | 2019 |
| Andersen Bygg Og VVS AS | Os | 2023 |
| Andersen Byggservice AS | Nordfold | 2023 |
| Andersen Eiendomservice AS | Finstadjordet | 2025 |
| Andersen Elektriske AS | Bodø | 2011 |
| Andersen Elektro AS | Greåker | 1993 |
| Andersen Elektro Tromsø AS | Tromsø | 2020 |
| Andersen Håndverk Og VVS AS | Klavestadhaugen | 2025 |
| Andersen Kran- Og Liftutleie AS | Hokksund | 2012 |
| Andersen Maletjenester AS | Larvik | 2021 |
| Andersen Og Aksnes Rørleggerbedrift AS | Hvalstad | 2013 |
| Andersen Og Dingsør AS | Brattholmen | 2002 |
| Andersen Og Hofslundsengen Bygg AS | Kaupanger | 1998 |
| Andersen Og Larsen Rørleggerbedrift AS | Oslo | 2015 |
| Andersen Rør AS | Harstad | 1998 |
| Andersen Tak AS | Kristiansand S | 2008 |
| Andersens Håndverktjenester AS | Hesseng | 2012 |
| Andersland Bygg AS | Uggdal | 1997 |
| Andersland Rør AS | Stord | 2005 |
| Anderssen Holding AS | Longyearbyen | 2015 |
| Andersson & Karlsen AS | Bodø | 2022 |
| Andersson & Kjærnsmo AS | Oslo | 1987 |
| Andersson & Ljungblad AB | 430 20 Veddige | 2006 |
| Andersson & Olsson Plåtslageri AB | Se-67127 Arvika | 2002 |
| Andersson Rail AB Nuf | Se-772 50 Grängesberg | 2026 |
| Anderssons Elektriska I Mjølby AB | Se-595 32 Mjölby | 2026 |
| Andholding AS | Kvaløysletta | 2021 |
| Andor Hovden AS | Nordfjordeid | 2003 |
| Andra Bygg AS | Bø I Telemark | 2016 |
| Andre Bakke Maskin AS | Ramnes | 2009 |
| Andre Budde | Fyresdal | 2007 |
| Andre Skurdal AS | Nordre Frogn | 2018 |
| Andreas Dønnestad AS | Tvedestrand | 1978 |
| Andreas Erland Bygg AS | Kristiansand S | 2017 |
| Andreas Erland Holding AS | Kristiansand S | 2021 |
| Andreas Haugen AS | Fagernes | 2026 |
| Andreas Heufler - Montage Von Parkleitsystemen | Oslo | 2010 |
| Andreas Karl GmbH & Co. KG | De-85777 Fahrenzhausen | 2021 |
| Andreas Loe AS | Oppdal | 2019 |
| Andreas Og Sønn Express AS | Oslo | 2012 |
| Andreas Schützenberger / Iou-Ramps Nuf | 94081 Fürstenzell | 2016 |
| Andreas Sætre & Sønner AS | Mathopen | 1974 |
| Andreas Torpen AS | Frogner | 2012 |
| Andreas Trønnes Byggservice AS | Lena | 2024 |
| Andreas Woxen Holding AS | Porsgrunn | 2023 |
| Andreassen & Aastveit AS | Froland | 1988 |
| Andreassen - Brønn Og Energiboring AS | Bjerkvik | 2016 |