| Alfa Airlines Services Norway AS | Transport & logistics | 2024 |
| Alfa Boliggass AS | Real estate | 1998 |
| Alfa Cabling Norway AS | Information & communication | 2022 |
| Alfa Eiendom Øst AS | Real estate | 2021 |
| Alfa Enterprises Norway AS | Professional & scientific | 2013 |
| Alfa Fasade AS | Administrative & support | 2020 |
| Alfa Group AS | Professional & scientific | 2024 |
| Alfa Innredninger Ans | Manufacturing | 2000 |
| Alfa Invest & Holding AS | | 2021 |
| Alfa Kompetanse AS | Education | 1988 |
| Alfa Limousine AS | Transport & logistics | 2022 |
| Alfa Malermesterfirma AS | Construction | 1997 |
| Alfa Mobility Norway AS | Transport & logistics | 2008 |
| Alfa Moving Norway AS | Transport & logistics | 2005 |
| Alfa Nor Eiendom AS | Real estate | 2009 |
| Alfa Nord AS | Financial services | 2005 |
| Alfa Og Omega Bygg AS | Construction | 2019 |
| Alfa Olis Gass & VVS AS | Construction | 2003 |
| Alfa Prior Eiendom AS | Real estate | 2022 |
| Alfa Sko AS | Manufacturing | 1989 |
| Alfa Technology Holding AS | | 2020 |
| Alfa Termografi AS | Construction | 2018 |
| Alfa Trykk AS | Manufacturing | 2019 |
| Alfa Vedlikehold AS | Education | 2013 |
| Alfabet AS | Hospitality | 2018 |
| Alfabeta Ans | Education | 1998 |
| Alfanaprapaten AS | Health & social care | 2019 |
| Alfanor 7120 AS | | 2007 |
| Alfaprint AS | Manufacturing | 1998 |
| Alfarnes Arkitektur AS | Professional & scientific | 2025 |
| Alfarvegen 22 AS | Real estate | 1994 |
| Alfarvegen 22 Holding AS | Real estate | 2022 |
| Alfaset 1. Industrivei 5 AS | Real estate | 1986 |
| Alfaset Accounting AS | Professional & scientific | 2021 |
| Alfaset Auto Verksted AS | Other services | 1991 |
| Alfaset Eiendom AS | Real estate | 2025 |
| Alfasetveien Næringsbygg AS | Real estate | 2017 |
| Alfasigma Norway AS | Health & social care | 2021 |
| Alfaskolen AS | Education | 2012 |
| Alfateamoslo AS | Construction | 2017 |
| Alfer AS | Professional & scientific | 2023 |
| Alfheimveien 2 AS | Real estate | 2022 |
| Alfhild Eiendom AS | Real estate | 2020 |
| Alfie Holding AS | | 2026 |
| Alfons Holding AS | | 2022 |
| Alfonso Holding AS | Health & social care | 2026 |
| Alfred AI AS | Information & communication | 2025 |
| Alfred Berg Kapitalforvaltning AS | Financial services | 1989 |
| Alfredo AS | Financial services | 2005 |
| Alfsen Og Gunderson AS | Wholesale & retail | 1993 |
| Alfsens Kokkedeliske AS | Education | 2013 |
| Alg Invest AS | Financial services | 2007 |
| Algaefree AS | Wholesale & retail | 2020 |
| Algaelife AS | Wholesale & retail | 2022 |
| Algaetech AS | Wholesale & retail | 2020 |
| Algam Nordic AS | Wholesale & retail | 2017 |
| Alganox AS | Professional & scientific | 2021 |
| Algarheimsvegen 33 AS | Real estate | 2016 |
| Algaut Prosjekt AS | Professional & scientific | 2015 |
| Algoritmika AS | Information & communication | 2023 |
| Algorix AS | Information & communication | 2024 |
| Algros AS | Wholesale & retail | 2002 |
| Alhajjam Import & Eksport AS | Wholesale & retail | 2023 |
| Alhambra Holding AS | Real estate | 2005 |
| Alhariri Taxi AS | Transport & logistics | 2023 |
| Alhasala AS | | 2021 |
| Alheco Shipping AS | Transport & logistics | 2021 |
| Alhousain AS | Health & social care | 2023 |
| Ali Holding AS | Professional & scientific | 2014 |
| Ali Tech Holding AS | | 2026 |
| Ali Wali AS | Information & communication | 2021 |
| Ali's Bilvask AS | Other services | 2026 |
| Alia AS | Administrative & support | 2025 |
| Alianco AS | | 2025 |
| Alianco Regnskap AS | Professional & scientific | 2025 |
| Alianco Transport AS | Transport & logistics | 2026 |
| Alias Da | Professional & scientific | 2010 |
| Alibier AS | Arts & recreation | 2013 |
| Alibo AS | Professional & scientific | 2015 |
| Alice & Bob AS | Information & communication | 2023 |
| Alice B Holding AS | | 2025 |
| Alice I Drømmeland AS | | 2021 |
| Alice Marble Ltd Nuf | Health & social care | 2012 |
| Alicia AS | Information & communication | 2020 |
| Alico AS | Transport & logistics | 2021 |
| Alien Holding AS | Health & social care | 2007 |
| Alien Innovation AS | Administrative & support | 2021 |
| Alien Nude Ltd Nuf | Wholesale & retail | 2010 |
| Alienum AS | Financial services | 2006 |
| Alif Holding AS | Wholesale & retail | 2023 |
| Alimentaria AS | Wholesale & retail | 2014 |
| Alina Eiendom AS | Real estate | 2007 |
| Alina Luna AS | Other services | 2025 |
| Alinaa AS | Wholesale & retail | 2020 |
| Alindland Invest AS | | 2025 |
| Alinea Analytics AS | Information & communication | 2019 |
| Alisios Tankers AS | Transport & logistics | 2025 |
| Alius Da | Wholesale & retail | 2025 |
| Alive Music AS | Professional & scientific | 2017 |
| Aliya Holding AS | | 2019 |