| Marin Design AS | Professional & scientific | 2006 |
| MK Havbris AS | Transport & logistics | 2026 |
| Mmnor Invest AS | Professional & scientific | 2021 |
| Mo-Eiendom AS | Real estate | 2026 |
| Moen Eiendommer AS | Manufacturing | 1987 |
| Moen Industributikk AS | Wholesale & retail | 2007 |
| Moen Industrier AS | Manufacturing | 2012 |
| Moen Verft AS | Manufacturing | 2008 |
| Moen-Gruppen AS | Manufacturing | 2008 |
| Mohn-Haug Invest AS | Professional & scientific | 2026 |
| Movest AS | | 2023 |
| MS Tangen AS | Professional & scientific | 2025 |
| MSM Management AS | Administrative & support | 2023 |
| Msø Invest AS | | 2023 |
| Mua Invest AS | | 2025 |
| Multitrans AS | Transport & logistics | 2013 |
| Myrstad Invest AS | Information & communication | 2023 |
| Månehuset AS | Real estate | 2020 |
| Måneset Havneterminal AS | Real estate | 2016 |
| Måneset Vassverk SA | Water & waste | 1967 |
| Møbelsentret Ytre Namdal AS | Wholesale & retail | 2009 |
| Namdal Byggutleie AS | Real estate | 1990 |
| Namdal Holding AS | Financial services | 2015 |
| Namdal Renhold Da | Administrative & support | 2002 |
| Navis Maritime AS | Professional & scientific | 2015 |
| Navmar AS | Information & communication | 2022 |
| Nesset Samdrift Da | Agriculture & fishing | 1998 |
| Nordsjøen Eiendom AS | Real estate | 2021 |
| Nærøy Bil AS | Other services | 1989 |
| Nærøy Sveiseservice AS | Manufacturing | 1987 |
| Nærøysteine Eiendom AS | Real estate | 2015 |
| Nærøysund Eiendom AS | Real estate | 2007 |
| Nærøysund Eiendomsutvikling AS | Real estate | 2009 |
| Nærøysund Entreprenør AS | Construction | 2008 |
| Nærøysund Gruppen AS | Manufacturing | 2015 |
| Nærøysund Invest AS | Professional & scientific | 2008 |
| Nærøysund Kraftbetong AS | Manufacturing | 2002 |
| Nærøysund Mobilknusing AS | Manufacturing | 2016 |
| Nærøysund Tannhelse AS | Health & social care | 2013 |
| Nærøysund Taxi AS | Transport & logistics | 2016 |
| Nærøysundet Kystservice AS | Real estate | 2009 |
| Nærøysundterminalene AS | Transport & logistics | 2009 |
| Nøtteliten Barnehage 1 AS | Education | 2024 |
| Oaa Invest AS | | 2025 |
| Olan Renhold Da | Administrative & support | 2022 |
| Opk Invest AS | Real estate | 2007 |
| Osan Settefisk AS | Agriculture & fishing | 2017 |
| Otsi Invest AS | Real estate | 2008 |
| Ottersøya Maritime Næringspark Bygg 5 AS | Real estate | 2018 |
| Ozo Marine AS | Professional & scientific | 2025 |
| P-Project AS | Construction | 2023 |
| Paulsen Maskin Holding AS | Real estate | 2011 |
| Preg Barnehager Lilleval AS | Education | 2006 |
| Presanghuset AS | Wholesale & retail | 1981 |
| Purkholmen Eiendom AS | Real estate | 2022 |
| Rajab AS | Wholesale & retail | 2018 |
| Ramstad-Steine Samdrift Da | Agriculture & fishing | 2005 |
| Regnskapskontoret Rebus AS | Professional & scientific | 1983 |
| Rosenborg Eiendom AS | Real estate | 2026 |
| Røed Investments AS | Real estate | 2025 |
| Sa-To AS | Real estate | 2002 |
| Sa-To Holding AS | Wholesale & retail | 1998 |
| Salmax Fiskehelse AS | Agriculture & fishing | 2026 |
| Salmax Group AS | Professional & scientific | 2020 |
| Salmax Group AS | Professional & scientific | 2026 |
| Salmax Research AS | Professional & scientific | 2024 |
| Salmax Service AS | Agriculture & fishing | 2024 |
| Salmax Smolt AS | Agriculture & fishing | 2024 |
| Samedia AS | Information & communication | 2024 |
| Sandvollen Invest AS | Wholesale & retail | 2005 |
| Selbøe Invest AS | Real estate | 2005 |
| Selnes Bøe Invest AS | Real estate | 2020 |
| Sentrum Campus AS | Arts & recreation | 2002 |
| Sentrum Eiendom AS | Real estate | 2009 |
| Sentrumsgata 10 AS | Real estate | 2022 |
| Sentrumsgata 6 AS | Real estate | 2022 |
| Sentrumsgata Eiendom AS | Real estate | 2019 |
| Sentrumsgata Tannklinikk AS | Health & social care | 2017 |
| Sikringen Alarmservice Ans | Construction | 1992 |
| Silokompaniet SA | Administrative & support | 2022 |
| Skaga Og Horvereid Utmarkslag SA | Arts & recreation | 2017 |
| Skaldstua AS | Arts & recreation | 2020 |
| Skamik AS | Manufacturing | 1998 |
| Skotvik AS | Construction | 2023 |
| Skotvik Bøe Invest AS | Professional & scientific | 2020 |
| Snartur AS | Wholesale & retail | 2020 |
| Ss-Invest AS | Real estate | 2004 |
| Steine Consulting AS | Professional & scientific | 2001 |
| Steine Kapital AS | | 2023 |
| Strand Og Omegn Maskinlag SA | Agriculture & fishing | 2002 |
| Strandstua Lunch Og Kaffebar Ans | Hospitality | 2009 |
| Strandval Pottemakeri AS | Manufacturing | 2006 |
| Strøm Eiendom AS | Real estate | 1997 |
| Sundan Holding AS | | 2022 |
| Sveinv Holding AS | | 2026 |
| Svenn O's Graveutførelse AS | Construction | 2011 |
| Svenno's Vei Og Drift AS | Construction | 2024 |
| Sverre Tangen Maskin Og Transport AS | Construction | 2015 |
| Sørenmo Elektro AS | Construction | 2013 |
| T R Moen AS | Health & social care | 2003 |