| Alia AS | Oslo | 2025 |
| Alibi AS | Tønsberg | 2007 |
| Alicelina AS | Verdal | 2005 |
| Alicja Renhold AS | Drøbak | 2023 |
| Alien Innovation AS | Oslo | 2021 |
| Alingi AS | Fredrikstad | 2025 |
| Alinto Group Nuf | Fr-69002 Lyon | 2026 |
| Alius Hjemservice AS | Tananger | 2016 |
| Alkit Utleie AS | Ål | 2022 |
| Alkoholfri Atelier AS | Oslo | 2026 |
| Alkriva AS | Lier | 2004 |
| All About Meetings | Se-118 46 Stockholm | 2023 |
| All Byggservice Utleie AS | Råde | 2023 |
| All Clean AS | Stavanger | 2024 |
| All Crew AS | Ålesund | 2025 |
| All in 1 Rengjøring Da | Trondheim | 2010 |
| All in One Solutions Ehf | Is-105 Reykjavik | 2015 |
| All Onboard Adventure AS | Tolvsrød | 2020 |
| All Prevent B.V. | 3194 Da Hoogvliet (Rt) | 2011 |
| All Remove Danmark | Dk-3200 Helsinge | 2011 |
| All Renhold AS | Oslo | 2025 |
| All Sales AS | Hosle | 2026 |
| All Service Team AS | Laksevåg | 2025 |
| All-In AS | Oslo | 2017 |
| All-In Live Concept AS | Gjøvik | 2023 |
| All-Service Da | Bagn | 2017 |
| All-Tjeneste AS | Krokelvdalen | 2008 |
| ALL10 AS | Stavanger | 2014 |
| ALL4REN AS | Kråkerøy | 2019 |
| Allby Holding AS | Tønsberg | 2010 |
| Allcare Solutions AS | Søgne | 2024 |
| Allean Project AS | Ørje | 2021 |
| Allen Marine Oü | Ee-11711 Tallinn | 2014 |
| Aller Travel AS | Oslo | 1990 |
| Alles Utleie AS | Stokke | 2023 |
| Allhjelp Haugesund AS | Haugesund | 2018 |
| Alliance Healthcare Management Service B.V. | 5462 Gh Veghel | 2014 |
| Alliance Smart Renhold AS | Drammen | 2026 |
| Allians Renhold AS | Hagan | 2021 |
| Allianse Vakt Og Sikkerhet Da | Sauland | 2004 |
| Alliansen AS | Strømmen | 2012 |
| Alliansen Bemanning Og Rekruttering AS | Strømmen | 2025 |
| Allied Universal Executive Protection and Intelligence Services Inc | Atlanta Ga 30305 | 2021 |
| Allinrenhold Ans | Tørberget | 2021 |
| Allmax AS | Flateby | 2021 |
| Allrate AS | Fyllingsdalen | 2020 |
| Allseas Maritime Personnel | 1781 Ad Den Helder | 2015 |
| Allsidig Drift & Logistikk AS | Svelvik | 2025 |
| Allsidig Håndverk AS | Oslo | 2024 |
| Allsidig Invest AS | Tromsø | 2015 |
| Allsidig Vaktmester AS | Tromsø | 2009 |
| Allslags Trappeklatrings- Og Vaktmesterhjelp AS | Helgeroa | 2021 |
| Allsolutions AS | Bagn | 2024 |
| Allsupport AS | Stange | 2015 |
| Allteam AS | Nesttun | 2019 |
| Allteck AS | Stokke | 2023 |
| Alltex Teamservice AS | Fyllingsdalen | 1981 |
| Alltid I Tide AS | Rena | 2020 |
| Alltidrent AS | Levanger | 2011 |
| Alltjänst Kenneth Jonsson | 67192 Arvika | 2003 |
| Allwinds AB Nuf | Fi-221 50 Jomala | 2026 |
| Alm & Alm Eiendomservice AS | Jaren | 2016 |
| Alm Veiservice & Utleie AS | Brandbu | 2024 |
| Alma Noor AS | Longyearbyen | 2024 |
| Almehagen Holding AS | Sandefjord | 2016 |
| Almeli Eiendom AS | Dal | 1987 |
| Almestad & Lochli Vei Og Vedlikehold AS | Hauglandshella | 2026 |
| Almo Consult AS | Gjettum | 2021 |
| Almås Småoppdrag AS | Sagvåg | 2017 |
| Alna Leasing AS | Oslo | 2016 |
| Alna Rengjøring AS | Moss | 1997 |
| Alnes Active AS | Godøya | 2019 |
| Alnes Båtutleie Ans | Godøya | 2023 |
| Alo Produksjoner AS | Bø I Vesterålen | 2019 |
| Alotta Energy AS | Ålesund | 2023 |
| Alpegull AS | Lier | 2023 |
| Alpene AS | Østerås | 2006 |
| Alpepass AS | Stranda | 2013 |
| Alpetur AS | Rådal | 2025 |
| Alpha Bemanning AS | Ålgård | 2015 |
| Alpha Franchise Consulting AS | Oslo | 2017 |
| Alpha Labour & Recruitment Ltd | Sheffield S2 5Qy England | 2023 |
| Alpha Security Da | Trondheim | 2005 |
| Alpha Service AS | Os | 2015 |
| Alpha Venturi AS | Haslum | 2016 |
| Alpha-Security AS | Sandstad | 2014 |
| Alphasec AS | Haugesund | 2025 |
| Alpine Welten Die Bergführer GmbH | Oslo | 2026 |
| Alpistar | Stjørdal | 2005 |
| Alrun Trading AS | Hardbakke | 2016 |
| Als Holding AS | Kongsvinger | 2026 |
| Alsaker LFC Holding AS | Onarheim | 2017 |
| Alsaker LFC Spain (Nuf) Nuf | Es-03580 L`Alfàs Del Pi Alicante | 2022 |
| Alsaker Vedlikehold AS | Stord | 2025 |
| Alstom Algerie Spa | Dz- Municipality Of Bir Mourad Raid | 2026 |
| Alstom Netherlands B.V. | 2983 Gs Ridderkerk | 2023 |
| Alstom Transport Danmark | Dk-2100 Köbenhavn | 2021 |
| Alstom Transport SA Romania | Ro-060119 Bucuresti | 2022 |
| Alstom Transport UK Limited | London Wc1V 7Aa | 2020 |
| Alsvinn AS | Oslo | 2025 |