| 4P Eiendom AS | Real estate | 2013 |
| 707 Technologies AS | Information & communication | 2021 |
| A. Vang Holding AS | Financial services | 2013 |
| A. Wist Holding AS | Real estate | 2013 |
| Aardal Bygg AS | Construction | 2010 |
| Aari Holding AS | Professional & scientific | 2023 |
| Abra Cadabra Barnehage AS | Education | 2016 |
| Adeveveriet Ans | Wholesale & retail | 2002 |
| Ae Levanger AS | Real estate | 2025 |
| Affexco Global AS | Professional & scientific | 2021 |
| Agg Invest AS | Real estate | 1992 |
| Ago Bygg AS | | 2016 |
| Agricola SA | Administrative & support | 2011 |
| Ak-Maskinutleie AS | Administrative & support | 2025 |
| Aktiv Eiendomsutvikling AS | Real estate | 2003 |
| Alex Dekor AS | Construction | 2025 |
| Alfaconsult Bakkely AS | Arts & recreation | 2015 |
| Alltidrent AS | Administrative & support | 2011 |
| Alstad Graving Og Vedlikehold AS | Manufacturing | 2023 |
| Alstad Sunde Fysioterapi AS | Health & social care | 2014 |
| Alt Film & TV | Information & communication | 2017 |
| Amf Holding AS | | 2018 |
| Amø Maskin AS | Construction | 2012 |
| An Holding AS | | 2008 |
| An Trøndelag AS | Education | 2023 |
| André Vevle AS | Wholesale & retail | 2008 |
| Ankora AS | Health & social care | 2024 |
| Anne-Brit K Holding AS | | 2022 |
| ANS LEVANGER BILSERVICE Snorre Flyum og Inge Flyum | Other services | 1987 |
| Ant Fysio- Og Manuellterapi AS | Health & social care | 2001 |
| Ant HMS & Bedriftshelse AS | Health & social care | 2004 |
| Aquanutrition AS | Professional & scientific | 2016 |
| Arne Steen AS | | 2017 |
| Arnold Invest AS | | 2025 |
| Arnstad AS | Transport & logistics | 2006 |
| Arnstadåsen Eiendom AS | Real estate | 2018 |
| Aroi Asia AS | Hospitality | 2017 |
| Art in Dent Levanger AS | Manufacturing | 2011 |
| Arve Skjerve Invest AS | Real estate | 2014 |
| AS Econ | Professional & scientific | 1991 |
| AS Levanger-Invest | Financial services | 1971 |
| AS Ullvaren | Real estate | 1987 |
| Askevold Invest AS | | 2026 |
| Asplund Transport AS | Transport & logistics | 2006 |
| At Work Holding AS | Information & communication | 2005 |
| At Work Invest AS | Financial services | 2005 |
| At Work Systems AS | Information & communication | 1997 |
| Aunan Holding AS | Wholesale & retail | 2005 |
| Avantago AS | Professional & scientific | 2017 |
| B2G Integrator AS | Information & communication | 2018 |
| Bakken El. Service AS | Construction | 2017 |
| Bamses Holding AS | | 2013 |
| Bamses Trafikkskole AS | Education | 2012 |
| BANKMEGLER1 AS | Financial services | 2007 |
| Bardrift Levanger Limited Nuf | Hospitality | 2010 |
| Base Camp Consultancy AS | Professional & scientific | 2024 |
| BB Eiendom Levanger AS | Real estate | 2013 |
| BC Eiendom Levanger AS | Real estate | 2013 |
| Be Boligutleie AS | Real estate | 2010 |
| Be Jernbanegata 19 Verdal AS | Real estate | 2016 |
| Be Kirkegata 30 AS | Real estate | 2016 |
| Be Melhustunet 1 AS | Real estate | 2018 |
| Be Moafjæra 10 AS | Real estate | 1998 |
| Be Moafjæra 3 AS | Real estate | 2008 |
| Be Moafjæra 4 AS | Real estate | 2000 |
| Be Moafjæra 5A AS | Real estate | 2025 |
| Be Moafjæra 6 AS | Real estate | 2006 |
| Be Moafjæra 6 Næring AS | Real estate | 2016 |
| Be Moafjæra 7C AS | Real estate | 2000 |
| Be Moafjæra 8 AS | Real estate | 2014 |
| Be Røra AS | Real estate | 2022 |
| Be Venusvegen 7 Verdal AS | Real estate | 2023 |
| Bekkevold Hold AS | | 2020 |
| Berg Byggtjenester AS | Construction | 2008 |
| Berg Eiendom Levanger AS | Real estate | 2018 |
| Berg Holding AS | Real estate | 1996 |
| Berg Økonomi AS | Professional & scientific | 1986 |
| Berge Stokkan AS | Construction | 2007 |
| Bergsmo Eiendom AS | Real estate | 2026 |
| Bergstien 6 AS | Real estate | 2022 |
| BIL2 AS | Wholesale & retail | 2015 |
| Bilhjørnet AS | Wholesale & retail | 2024 |
| Bjørn Stakset Sport AS | Wholesale & retail | 1991 |
| Bjørnaas Invest AS | Financial services | 2005 |
| Bjørum Gartneri AS | Real estate | 2000 |
| Bjørås Eiendom AS | Construction | 1978 |
| Blengsli Invest AS | Manufacturing | 2023 |
| Blikkmester AS | Construction | 2025 |
| Borgsøen Invest AS | Professional & scientific | 1994 |
| Borgund Bo AS | Real estate | 1987 |
| Borgund Holding AS | | 2007 |
| Boros Byggservice AS | Construction | 2024 |
| BR. Jessen Svinehold Da | Agriculture & fishing | 2018 |
| Branesvegen 2 AS | Real estate | 2016 |
| Brat Eiendom AS | Real estate | 2022 |
| Brath Eiendom AS | Real estate | 1999 |
| Brenne Dekk AS | Wholesale & retail | 2013 |
| Brennmål Melk Da | Agriculture & fishing | 2004 |
| Brustad Busstrafikk AS | Administrative & support | 1983 |
| Brustad Invest AS | Administrative & support | 2005 |