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| Antonsen Transportservice AS | Stokke | 2015 |
| Antras Nord AS | Sauland | 2021 |
| Anvit AS | Skui | 2020 |
| Anyes AS | Oslo | 2008 |
| Anzo Group AS | Hell | 2014 |
| Aot Norway AS | Ålgård | 2023 |
| Aov Transport AS | Hernes | 2019 |
| Ap Baleine 3 Operations AS | Trondheim | 2026 |
| Ap Transport AS | Sandnes | 2015 |
| Apcoa Norway AS | Oslo | 1980 |
| Apcoa Scandinavia AS | Oslo | 1999 |
| Apex Nordic Deal 1 AS | Oslo | 2020 |
| Apollo Budbiler AS | Mjøndalen | 2010 |
| Apr Flytting AS | Klepp Stasjon | 2008 |
| Apr Lager AS | Stavanger | 2008 |
| Apr Lager Sandnes AS | Sandnes | 2017 |
| Apr Norge AS | Sandnes | 2008 |
| Aq Infra Nordvest AS | Vigra | 2024 |
| Aq Parkering AS | Kristiansand S | 2010 |
| Aqs Rederi AS | Flatanger | 2016 |
| Aqua Atlantic AS | Torangsvåg | 2024 |
| Aqua Expeditions Pte Ltd Nuf | 159410 Singapore | 2025 |
| Aquadrill Leo Ltd. - Norway Branch Nuf | Hm 11 Hamilton | 2022 |
| Aquaship AS | Kristiansund N | 2018 |
| Aquaship Salmon Star AS | Kristiansund N | 2015 |
| Aquaship Service AS | Smøla | 1994 |
| Aquatrans AS | Smøla | 2014 |
| Arad Transport AS | Sandnessjøen | 2025 |
| Aranka Shipping AS | Grimstad | 2011 |
| Arbeidergata Eiendom AS | Kirkenes | 2002 |
| Arbo Consulting AS | Larvik | 2004 |
| Arc Group Holding AS | Lysaker | 2018 |
| Arch Timber Protection Limited Nuf | M 8Gq Blackley Manchester | 2024 |
| Arctic Air AB | Se-938 97 Arjeplog | 1998 |
| Arctic Assistanse AS | Svolvær | 2023 |
| Arctic Aviation AS | Bodø | 2001 |
| Arctic Bus Norway AS | Stamsund | 2011 |
| Arctic Buss AS | Vanvikan | 2002 |
| Arctic Circle Tours AS | Krokelvdalen | 2006 |
| Arctic Cruise in Norway AS | Tromsø | 2014 |
| Arctic Explorer AS | Tromsø | 2014 |
| Arctic Express Line AS | Oslo | 2009 |
| Arctic Express OY | Fi-90530 Oulu | 2019 |
| Arctic Logistics Hammerfest AS | Rypefjord | 1987 |
| Arctic Loop AS | Grovfjord | 2018 |
| Arctic Mobility AS | Harstad | 2025 |
| Arctic Ocean Services AS | Risøyhamn | 2025 |
| Arctic Offshore AS | Kirkenes | 2007 |
| Arctic Offshore International AS | Oslo | 2009 |
| Arctic Offshore Rig AS | Oslo | 2020 |
| Arctic Quest AS | Reinfjord | 2024 |
| Arctic Reefers AS | Oslo | 2004 |
| Arctic Shipping AS | Oslo | 2014 |
| Arctic Supply & Renewables AS | Bekkjarvik | 2024 |
| Arctic Thermo | Dk-6230 Rødekro | 2021 |
| Arctic Train Holding AS | Narvik | 2019 |
| Arctic Transport AS | Tomasjord | 2026 |
| Arctic Transport Service AS | Ramfjordbotn | 2025 |
| Arctic Vans AS | Aurskog | 2025 |
| Arctic Whale Tours AS | Stø | 2017 |
| Arctica Expeditions AS | Tromsø | 2011 |
| Arcturus Invest AS | Blomsterdalen | 2022 |
| Arema AS | Skien | 2005 |
| Arena Beiarn AS | Moldjord | 2014 |
| Arena Transport AS | Frogner | 2025 |
| Arendal Bud & Varetaxi Da Torfinn Nordli Og Geir Aas. | Arendal | 1989 |
| Arendal Logistikk AS | Arendal | 2014 |
| Arendal Lufthavn Gullknapp AS | Froland | 1984 |
| Arendal Taxi AS | Arendal | 2023 |
| Arendal Terminal Service AS | Eydehavn | 2024 |
| Arendalbilbergingsselskab AS | Rykene | 2018 |
| Arendals Dampskibsselskab AS | Kolbjørnsvik | 2006 |
| Argentum AS | Bergen | 2023 |
| Argo Aviation International Ltd Nuf | Narvik | 2008 |
| Argos Transport AS | Bjørøyhamn | 2013 |
| Argu Transporttjenester AS | Kvelde | 2023 |
| Aria Mobility AS | Oslo | 2023 |
| Ariel Logistikk AS | Oslo | 2016 |
| Aries Supply AS | Oslo | 2024 |
| Aries Warrior AS | Oslo | 2007 |
| Arifs Transport AS | Lørenskog | 2022 |
| Arild Holm AS | Hustad | 2016 |
| Arild Johansen Transport AS | Hagan | 1982 |
| Arild Nylund Transport AS | Stord | 2011 |
| Arild Vedvik Kran & Transport AS | Stokke | 1999 |
| Arill Gabrielsen AS | Enger | 2020 |
| Arina Transport AS | Skjetten | 2024 |
| Arinc Direct LLC | Ia 52498 Cedar Rapids | 2018 |
| Arivo AS | Oslo | 2025 |
| Arivr AS | Oslo | 2025 |
| Arjo Transport AS | Oppaker | 2024 |
| Ark Group AS | Tromsdalen | 2025 |
| Arkil | Oslo | 2013 |
| Arko Transport AS | Oslo | 2025 |
| Armadora AS | Bergen | 1999 |
| Armann AS | Oslo | 2005 |
| Armen AS | Dyrvik | 2026 |
| Arna Trans Nuf | Ytre Arna | 2014 |
| Arnatveit Transport Ans | Haukeland | 1995 |