| Aljadan Maling AS | Construction | 2026 |
| Alju Invest AS | | 2024 |
| Alk Invest AS | | 2007 |
| Alke AS | Manufacturing | 2022 |
| Alkemisten Bar AS | Hospitality | 2024 |
| Alkemix AS | Professional & scientific | 2009 |
| Alkhatib Transport AS | Transport & logistics | 2018 |
| Alkofondet AS | | 2022 |
| Alkoholfri Atelier AS | Administrative & support | 2026 |
| All Access Scandinavia AS | Hospitality | 2006 |
| All Artisans AS | Wholesale & retail | 2024 |
| All AS | Professional & scientific | 2023 |
| All Assistance Nuf | Wholesale & retail | 2018 |
| All Bygg Drift AS | Construction | 2005 |
| All Concept Da | Wholesale & retail | 1995 |
| All Day Invest AS | | 2026 |
| All Done AS | Real estate | 2020 |
| All Elements AS | | 2020 |
| All Frames Matter AS | Arts & recreation | 2025 |
| All Images AS | Information & communication | 2019 |
| All in & GG Music AS | Information & communication | 2018 |
| All in One AS | Wholesale & retail | 2022 |
| All in One Kjøtt Senter AS | Wholesale & retail | 2025 |
| All in Private Equity AS | | 2025 |
| All in Service AS | Construction | 2019 |
| All in Ventures AS | | 2023 |
| All in Vest AS | Real estate | 2014 |
| All Mediskin AS | Wholesale & retail | 2018 |
| All Mine AS | Construction | 2012 |
| All of Norway AS | Information & communication | 2025 |
| All of This Holding AS | | 2022 |
| All Or Nothing Coaching AS | Education | 2014 |
| All Pine Press AS | Professional & scientific | 2022 |
| All Plast Engineering Norway AS | | 2023 |
| All Renhold AS | Administrative & support | 2025 |
| All the Way AS | Transport & logistics | 2005 |
| All Things Live Norway AS | Professional & scientific | 2011 |
| All Things Live Norway Holding AS | Professional & scientific | 2020 |
| All Time High AS | Financial services | 2016 |
| All Tomorrow's Studio AS | Professional & scientific | 2012 |
| All-In AS | Administrative & support | 2017 |
| All-In Finance AS | Professional & scientific | 2025 |
| All-In Fund Services AS | Professional & scientific | 2025 |
| All-In-One Solution AS | Real estate | 2024 |
| Alla Aamin Holding AS | Financial services | 2018 |
| Allan AS | Mining & quarrying | 2007 |
| Allanson Holand Invest AS | | 2022 |
| Allanson Invest AS | | 2021 |
| Allcap AS | | 2022 |
| Allday Group AS | Hospitality | 2019 |
| Alldis AS | Wholesale & retail | 2016 |
| Alle Fugler AS | Arts & recreation | 1994 |
| Alle I Arbeid AS | Health & social care | 2020 |
| Alle Mulige Oppdrag AS | Construction | 2015 |
| Alle Tall AS | Professional & scientific | 2011 |
| Alle Tiders AS | Wholesale & retail | 2024 |
| Alle Tiders Kommunikasjon AS | Professional & scientific | 2014 |
| Allebo Styrebistand AS | Professional & scientific | 2023 |
| Alleen 21 AS | Real estate | 2021 |
| Allego Norway AS | Professional & scientific | 2018 |
| Allegra AS | Wholesale & retail | 2004 |
| Allegra Capital AS | | 2023 |
| Allegro AS | Real estate | 1990 |
| Allehelgens Gate 6 AS | Real estate | 2012 |
| Allehelgens Gate 6 Holding AS | Real estate | 2014 |
| Allemanns AS | Real estate | 2014 |
| Allena AS | Information & communication | 2023 |
| Allende Bygg Ans | Construction | 2023 |
| Allente Norge AS | Information & communication | 1997 |
| Aller Media AS | Information & communication | 1897 |
| Aller Property AS | Real estate | 2011 |
| Aller Travel AS | Administrative & support | 1990 |
| Allergan Pharmaceuticals Ireland | Wholesale & retail | 2012 |
| Allergodt Holding AS | Professional & scientific | 2016 |
| Allergotskogen BT1 Tilvisning AS | Construction | 2026 |
| Allergotskogen BT2 Tilvisning AS | Real estate | 2026 |
| Allersgården 2 AS | Real estate | 2021 |
| Allfarveg AS | Construction | 2004 |
| Alliance Chemtankers AS | Transport & logistics | 2024 |
| Alliance Eiendom AS | Real estate | 1989 |
| Alliance Eiendomsforvaltning AS | Real estate | 1985 |
| Alliance Healthcare Norge Apotekdrift AS | Wholesale & retail | 2000 |
| Alliance I Sentrum AS | Real estate | 2008 |
| Alliance Marine Services Ltd | Mining & quarrying | 2006 |
| Alliance Microfinance AS | | 2009 |
| Alliance Mobile AS | Transport & logistics | 2022 |
| Alliance Prosjekt AS | Professional & scientific | 1988 |
| Alliance Transport Og Spedisjon AS | Transport & logistics | 1992 |
| Alliance Venture AS | Financial services | 2000 |
| Alliance Venture Management AS | Professional & scientific | 2017 |
| Alliance Venture Partners AS | Financial services | 2006 |
| Alliance Venture Polaris AS | Financial services | 2006 |
| Alliance Venture Spring AS | Financial services | 2014 |
| Allianse Helse AS | Health & social care | 2025 |
| Allianse Holding AS | Real estate | 2010 |
| Alliant AS | Professional & scientific | 2023 |
| Alliero AS | Construction | 1999 |
| Allierogruppen AS | Construction | 1999 |
| Allin AS | | 2026 |
| Allin Capital AS | | 2026 |