| Andre Krause - Arkitektur AS | Tromsdalen | 2023 |
| Andre Regnskap AS | Eidsnes | 1987 |
| Andre Vind Ans | Tolvsrød | 2024 |
| Andrea Hegna AS | Oslo | 2023 |
| Andrea Lynne AS | Oslo | 2025 |
| Andreas Akre AS | Trysil | 2020 |
| Andreas Bakkerud AS | Morvik | 2014 |
| Andreas Engesvik AS | Oslo | 2005 |
| Andreas Hole Holding AS | Oslo | 2017 |
| Andreas Johnsen AS | Holmestrand | 2022 |
| Andreas Kiste AS | Oslo | 2018 |
| Andreas Krogstad AS | Hamarvik | 2023 |
| Andreas Krug | Sortland | 2008 |
| Andreas Solution AS | Kongsvinger | 2024 |
| Andreas Thome AS | Eiksmarka | 2017 |
| Andreas Ziener Holding AS | Saltnes | 2023 |
| Andreassen Byggtjenester AS | Lillehammer | 2011 |
| Andreks AS | Kråkerøy | 2025 |
| Andresen Synergi AS | Ski | 2023 |
| Andrew Buchan Ltd | Peterhead Ab42 2Au - Aberdeenshire | 2014 |
| Andrew Lowe Hydrographic Services Ltd | Whitchurch Sy13 1Gw | 2013 |
| Andrew Padgett Ltd | Suffolk Nr32 2Hd | 2019 |
| Andrew Richardson Contractor Engineering Ltd | Cambridge Cb25 9Pb | 2019 |
| Andrews Associates Limited | Stroud Gl6 6Jd | 2016 |
| Andrews Hydrographics Ltd | Buckinghamshire Hp11 2Ee | 1995 |
| Andriana Invest AS | Oslo | 2020 |
| Andrik Consulting AS | Sandnes | 2013 |
| Andrimne AS | Sunndalsøra | 2020 |
| Andritz Como Srl-Nuf | It-22070 Grandate Como | 2025 |
| Andritz Feed & Biofuel | Dk-6705 Esbjerg Ø | 2010 |
| Andritz Hydro AG | Ch-6010 Kriens | 2020 |
| Andritz Küsters GmbH - Nuf | De-47805 Krefeld | 2025 |
| Andromeda RB AS | Oslo | 2020 |
| Andrup Design AS | Nøtterøy | 1997 |
| André Trogstad Holding AS | Raufoss | 2021 |
| Andsbjerg Geoscience | Københaven S 2300 | 2010 |
| Andtek AS | Oslo | 2024 |
| Andvar AS | Stavanger | 2021 |
| Andy Thornton Worldwide Interiors Limited Nuf | Hd6 1Az Brighouse | 2024 |
| Andåstangen Byggelag SA | Flekkerøy | 2020 |
| Andøya Space AS | Andenes | 1997 |
| Andøya Space Defence AS | Andenes | 1997 |
| Ane Design Interiørservice Ans | Mjølkeråen | 1984 |
| Ane Olrud AS | Oslo | 2026 |
| Anecon AS | Stavanger | 2019 |
| Anedge AS | Nesøya | 2020 |
| Anekdote AS | Bergen | 2023 |
| Aneke Holding AS | Oslo | 2024 |
| Anel AS | Finnøy | 2012 |
| Anelom AS | Høvik | 2020 |
| Anelsen AS | Oslo | 2005 |
| Anemone Studio AS | Oslo | 2011 |
| Anemos AS | Ask | 2024 |
| Aneo Build AS | Oslo | 2019 |
| Aneo Industry AS | Trondheim | 2022 |
| Aneo Production Holding AS | Trondheim | 2022 |
| Aneo Renewables Norway AS | Trondheim | 2022 |
| Aneo Retail AS | Gjøvik | 2008 |
| Aneo Retail International AS | Gjøvik | 2021 |
| Aner AS | Årnes | 2021 |
| Anero AS | Lyngdal | 2021 |
| Anette Hovland AS | Stavanger | 2022 |
| Anette Moi AS | Stavanger | 2020 |
| Anew Branding AS | Harstad | 2006 |
| Anew Konsulting AS | Oslo | 2017 |
| Anew Kontor AS | Oslo | 2025 |
| Anf Konsulent AS | Hokksund | 2020 |
| Anfar Invest AS | Nesøya | 2005 |
| Anfinnsen Innvest AS | Nærbø | 2014 |
| Anfinsen Consulting AS | Eidsvågneset | 2023 |
| Anfinsen Invest AS | Eidsvågneset | 2023 |
| Anfreca AS | Bekkestua | 1999 |
| Anga Consulting AS | Oslo | 2021 |
| Angela International Da | Oslo | 2003 |
| Angell Advokatfirma AS | Bodø | 2007 |
| Angell Holding AS | Sørvik | 2023 |
| Angell Invest AS | Hundvåg | 2010 |
| Angells Næringsutvikling AS | Sortland | 2002 |
| Angelo Partner AS | Oslo | 2008 |
| Angen Consulting AS | Fagerstrand | 2024 |
| Angenovo AS | Oslo | 2019 |
| Angewandte System Technik GmbH Energie & Umwelttechnik | De-85283 Wolznach | 2026 |
| Angkor AS | Oslo | 2007 |
| Angle Engineering AS | Kleppe | 2021 |
| Angvik Gruppen AS | Angvik | 2013 |
| Angvik Prosjektering AS | Angvik | 2007 |
| Ani Instrumentation Limited | Middlesbrough Ts6 0St | 2012 |
| Anic UK Ltd | Pl25 3Ta Cornwall | 2006 |
| Anico AS | Steinkjer | 2025 |
| Anicura AS | Oslo | 2013 |
| Anicura Online AS | Oslo | 2019 |
| Anike AS | Råholt | 2019 |
| Anike Holding AS | Råholt | 2021 |
| Anima Dyreklinikk Og Butikk AS | Sandvika | 2004 |
| Anima Holding AS | Slependen | 2025 |
| Animaskin AS | Oslo | 2016 |
| Animer AS | Saupstad | 2024 |
| Animo AS | Oslo | 2021 |
| Animo Holding AS | Oslo | 2012 |
| Animol Entertainment AS | Oslo | 2025 |