| A-B Consulting AS | Professional & scientific | 2023 |
| Aces Customs AS | Manufacturing | 2014 |
| Akvaserv Engineering AS | Professional & scientific | 2016 |
| Amron AS | Professional & scientific | 2019 |
| Antonsen Legedrift AS | Health & social care | 2015 |
| Autoclean AS | Wholesale & retail | 2019 |
| Autosenteret Spillum AS | Wholesale & retail | 2023 |
| B K Holding AS | Administrative & support | 2019 |
| B K Utleie AS | Administrative & support | 2022 |
| Bangdal Bruk AS | Real estate | 2012 |
| Bangdalen Eiendom Da | Real estate | 2007 |
| Bangdalen Samdrift Da | Agriculture & fishing | 2002 |
| Bangdalen Vassverk AS | Water & waste | 2012 |
| Barstad Barnehage SA | Education | 1989 |
| Bengt Blom AS | Health & social care | 2019 |
| Bernt Dahl Byggtjenester AS | Construction | 2021 |
| Bernt Dahl Holding AS | Construction | 2021 |
| Bernt Dahl Vaktmester Og Renholdstjenester AS | Administrative & support | 2021 |
| Berre Aksje Holding AS | Other services | 2022 |
| Berre Eiendom AS | Real estate | 2022 |
| Berre Entreprenør AS | Construction | 2022 |
| Bilpartner Namsos AS | Administrative & support | 1995 |
| Bilsenteret Eiendom Navarveien AS | Real estate | 1998 |
| Bilsenteret Invest AS | Real estate | 2005 |
| Bilsenteret Namsos AS | Wholesale & retail | 1996 |
| Bilskadesenteret Namsos AS | Other services | 2017 |
| Bilteknikk Eiendom AS | Real estate | 2022 |
| Bjørns Burger & Utleieservice AS | Hospitality | 2023 |
| BN Auto-Studio AS | Other services | 2017 |
| Bobilsenteret Namsos AS | Wholesale & retail | 2000 |
| Bobilsentret Holding AS | Wholesale & retail | 2005 |
| Bogna Elveeierlag SA | Other services | 1964 |
| Bolkan Eiendom AS | Real estate | 1997 |
| Bolkan Kranservice AS | Construction | 1989 |
| Bolkan Last AS | Transport & logistics | 2003 |
| Bolkan Trans Namsos AS | Transport & logistics | 1994 |
| Bondø Holding AS | | 2025 |
| Bragstad Transport AS | Transport & logistics | 2009 |
| Brandø Holding AS | Wholesale & retail | 2005 |
| Brygga Båt AS | Wholesale & retail | 1998 |
| Brødrene Ytterdahl AS | Transport & logistics | 1995 |
| BS Entreprenør AS | Construction | 2014 |
| BS Holding Eiendom AS | Construction | 2014 |
| Cr'Emanilsen AS | Professional & scientific | 2024 |
| CS Service AS | Professional & scientific | 2023 |
| Dataparty Midt-Norge Ans | Information & communication | 2003 |
| Einar Selseth AS | Transport & logistics | 2013 |
| Ek Byggtjenester AS | Construction | 2000 |
| Ekker Energy AS | Professional & scientific | 2018 |
| Elmaly AS | Other services | 2021 |
| Empi AS | Financial services | 2015 |
| F. Dahl Invest AS | Real estate | 2021 |
| Flaagan Holding AS | | 2024 |
| Flasnes Eiendom AS | Real estate | 2025 |
| Flasnes Holding AS | | 2025 |
| Flasnes Transport AS | Transport & logistics | 2025 |
| Fløan AS | Manufacturing | 2020 |
| Frobe Holding AS | Construction | 2022 |
| G G Maskin AS | Mining & quarrying | 1990 |
| Glømmen Eiendom AS | Real estate | 1986 |
| Glømmen Entreprenør AS | Construction | 2021 |
| Grønlihøgda Eiendom AS | Real estate | 2025 |
| Gsat Holding AS | Arts & recreation | 2024 |
| Gåsbakk Utleie AS | Real estate | 2024 |
| He-Plan AS | Manufacturing | 1981 |
| He-Plan Eiendom II AS | Real estate | 2020 |
| Hestmarka Eiendom AS | Real estate | 2022 |
| Holmenvegen Eiendom AS | Real estate | 2019 |
| Hundseth Skog & Gårdsservice AS | Construction | 2018 |
| Håte Eiendom AS | Real estate | 2023 |
| In-Bo Møbler AS | Wholesale & retail | 2004 |
| Industrivegen 2 AS | Real estate | 2021 |
| Industrivegen 4 Eiendom AS | Real estate | 2011 |
| JJL Invest AS | | 2025 |
| JK Transport AS | Transport & logistics | 2014 |
| KK Sveis Og Vedlikehold AS | Manufacturing | 2013 |
| Klingen Bygg AS | Construction | 2025 |
| Klingen Eiendom AS | Administrative & support | 2013 |
| Klingen Maskinentreprenør AS | Construction | 2013 |
| Kontorspesialistene Namsos AS | Wholesale & retail | 2009 |
| Kvenntangen AS | Real estate | 2024 |
| Lakkspesialisten AS | Other services | 1994 |
| Lang AS | | 2026 |
| Lang Eiendom AS | Real estate | 2026 |
| Lian Bil Og Transport AS | Transport & logistics | 2020 |
| Løvegen 1 AS | Real estate | 2019 |
| Løvsjølia Vestre Hytteområde Veilag SA | Real estate | 2016 |
| Maler B.R. Haugan AS | Construction | 2018 |
| Masi Bensin AS | Wholesale & retail | 2008 |
| Mekh Holding AS | | 2021 |
| Meox AS | Professional & scientific | 2021 |
| MESTER1 Takst AS | Professional & scientific | 2009 |
| MK Maskin&Mekk AS | Administrative & support | 2021 |
| Mn-Vekst AS | Health & social care | 1988 |
| Mn-Vekst Holding AS | Health & social care | 2021 |
| Mn-Vekst Service AS | Health & social care | 2022 |
| Mohrsen Eiendom AS | Real estate | 2019 |
| Mohrsen Holding AS | Real estate | 2023 |
| Mohrsen Multiservice AS | Other services | 2021 |
| Motorpartner Namsos AS | Wholesale & retail | 1995 |