| Artic Aquaculture AS | Kabelvåg | 1998 |
| Artic Aurora Tromsø AS | Tromsø | 2026 |
| Artic Clean AS | Finnsnes | 2025 |
| Artic Ltd Nuf | Leknes | 2004 |
| Artic Personal Szczecin | Pl - 70 466 Szczesin | 2007 |
| Artika Lofoten AS | Sørvågen | 2026 |
| Artimet Industry SRL | Ro-605400 Bacau | 2020 |
| Artisten Musikkformidling Ans | Tromsø | 1997 |
| Artko AS | Strømmen | 1997 |
| Artor AS | Gran | 2025 |
| Arune Renhold AS | Borgenhaugen | 2023 |
| Arvakr AS | Oslo | 2024 |
| Arval AS | Oslo | 2017 |
| Arve Nilssen AS | Trondheim | 2017 |
| Arves Vaktmesterservice AS | Beitostølen | 2002 |
| Arvika Sport AB | 672 93 Årjang | 2011 |
| Arvus AS | Ridabu | 1997 |
| AS Argentario | Oslo | 1988 |
| AS Bislet Bilutleie | Oslo | 1989 |
| AS Bøe & Lepsøy | Hagavik | 1940 |
| AS Consulting Company - Arthur Sandum Nuf | Pl-80 434 Gdansk | 2009 |
| AS Corint | Høvik | 1987 |
| AS Fjellguide.No | Isfjorden | 2015 |
| AS Grønnevik Maskin | Stavanger | 1989 |
| AS Gårdreform | Oslo | 1987 |
| AS Hagemiljø | Vingrom | 2022 |
| AS Hibas | Vøyenenga | 1978 |
| AS Ilaveien 32 | Fredrikstad | 1981 |
| AS Kanalmontasje | Oppdal | 1982 |
| AS Knertens Bilsenter | Sofiemyr | 1971 |
| AS Lyngtun | Oslo | 1984 |
| AS Norsk Reiseliv | Tresfjord | 1989 |
| AS Ny Form Souvenir | Spikkestad | 1977 |
| AS Partygutta | Reinli | 2022 |
| AS Rettsinkasso | Lierstranda | 1983 |
| AS Skan-Kontroll | Oslo | 1974 |
| AS Tank Storage | Oslo | 2007 |
| AS Tonstad Beboertjenester | Trondheim | 1983 |
| AS Valdresbanen | Dokka | 1991 |
| AS Velara | Skogsvåg | 1987 |
| AS2 Holding AS | Fjellhamar | 2018 |
| Asap Personal AS | Jørpeland | 2001 |
| Asas Grupe Uab Nuf | Skjervøy | 2020 |
| Asator AS | Paradis | 2019 |
| Asbjørn Neverdal AS | Laksevåg | 2014 |
| Asbjørnsen & Moe AS | Sand | 2007 |
| Asbyrgi Invest AS | Fredrikstad | 2014 |
| Ascend SC | Tx 77056 | 2023 |
| Ascensores Ga Lo SL | Es-08908 L'Hospitalet De Llobregat | 2019 |
| Ascent Norway AS | Oslo | 2021 |
| Ascento AS | Bekkestua | 2019 |
| Aservice AS | Ålesund | 2011 |
| Asfaltfeiing AS | Sandefjord | 2026 |
| Asfaltspesialisten AS | Brøstadbotn | 2019 |
| Asg Merchant B.V. | 2131 Ha Hoofddorp | 2000 |
| Asgard Renhold AS | Sandnes | 2026 |
| Asgeir AS | Bjerkreim | 2017 |
| Asgeir Flåten AS | Olden | 2021 |
| Ash Utleie & Invest AS | Sandefjord | 2026 |
| Ashtead Technology AS | Klepp Stasjon | 2010 |
| Ashtead Technology Limited | Gb-Aberdeenshire Ab32 6Fg | 2011 |
| Ashton Burke Services Nuf | Gressvik | 2014 |
| Asian Nice Trip AS | Oslo | 2024 |
| Asian Super Travel AS | Oslo | 2024 |
| Asib Wasserberg E.K. | De-13405 Berlin | 2012 |
| Asinor Konsulent AS | Lørenskog | 2019 |
| Ask Eiendomsdrift AS | Heimdal | 2015 |
| Aska Services AS | Oslo | 2016 |
| Askeladden Reiser AS | Hønefoss | 2002 |
| Askepot Da | Søgne | 2013 |
| Askepott Industri Renhold AS | Kvaløya | 2021 |
| Askepotts Renhold AS | Kvaløya | 2013 |
| Askepotts Renhold Og Vedlikehold AS | Kvaløya | 2025 |
| Asker & Bærum Bilutleie AS | Haslum | 1984 |
| Asker & Bærum Vaktmesterkompani AS | Vøyenenga | 2019 |
| Asker Bilutleie AS | Asker | 1982 |
| Asker Fasadevask AS | Borgen | 2022 |
| Asker Fotballfest AS | Asker | 2023 |
| Asker Hageservice AS | Asker | 2014 |
| Asker Maskin AS | Heggedal | 2025 |
| Asker Maskin Og Liftutleie AS | Hvalstad | 2005 |
| Asker Og Bærum Anlegg AS | Asker | 2005 |
| Asker Og Bærum Servicetjenester AS | Skui | 2024 |
| Asker Og Bærum Traktortjenester AS | Slependen | 1997 |
| Asker Reisebyrå AS | Asker | 2006 |
| Asker Skadedyrkontroll AS | Filtvet | 2019 |
| Askim Sikkerhetsservice AS | Askim | 2022 |
| Askje Invest AS | Dalen | 2010 |
| Askoy Subsea Engineering Ltd Nuf | Strusshamn | 2005 |
| Askvoll Bil Da | Askvoll | 2007 |
| Askøy Hage AS | Kjerrgarden | 2017 |
| Asla AS | Valestrandsfossen | 2021 |
| Aslaksen Drift Og Vedlikehold AS | Tvedestrand | 2026 |
| Aslaksen Portservice AS | Hammerfest | 2026 |
| Aso AS | Drammen | 2021 |
| Asociacion De Urbanas Y Rusticas | 28001 Madrid | 2014 |
| Asodar AS | Oslo | 2019 |
| Asora Da | Tromsø | 2003 |
| Asp Gruppen AS | Tønsberg | 2000 |
| Aspa Norge AS | Kløfta | 2017 |