| Akinvest AS | | 2024 |
| Akva Group Land Based Sømna AS | Manufacturing | 1988 |
| Alfs Håndverkertjeneste Da | Construction | 1998 |
| Aluform AS | Manufacturing | 2020 |
| Arnes & Warholm Landbruksentreprenør Da | Agriculture & fishing | 2022 |
| Arnøy AS | Manufacturing | 2016 |
| Arnøy Eiendom AS | Real estate | 2013 |
| Aymen Gym AS | Arts & recreation | 2026 |
| Aymen Market AS | Wholesale & retail | 2025 |
| Barlien Eiendom AS | Real estate | 2022 |
| Berg Service AS | Other services | 1986 |
| Bergodden Kai & Lager AS | Real estate | 2026 |
| Bertelsen Og Enge Interiørarkitekter Nil Ans | Professional & scientific | 1988 |
| Bjørn Solli AS | Construction | 1993 |
| Bjørnvika Natursenter AS | Hospitality | 2016 |
| Blå Bolig AS | Wholesale & retail | 2004 |
| Bygg Og Fritid AS | Construction | 1990 |
| Byggspesialisten AS | Construction | 1990 |
| Einvik Transport AS | Transport & logistics | 2018 |
| Fjord Rådgivning AS | Professional & scientific | 2024 |
| Fra Eiendom AS | Real estate | 2024 |
| Frampå Eiendom AS | Real estate | 2022 |
| Gauper AS | Manufacturing | 2015 |
| Goheim Takst Og Byggconsult AS | Professional & scientific | 2012 |
| Grøtheimslia Samdrift Da | Agriculture & fishing | 2003 |
| Hans Ivar Slåttøy Transport AS | Transport & logistics | 2003 |
| Hauglund Maskin AS | Manufacturing | 2002 |
| Helgeland Sveis AS | Manufacturing | 2007 |
| HMS. Eiendom AS | Real estate | 2019 |
| Irpafilm AS | Information & communication | 2021 |
| Irpafilm Distribution AS | Information & communication | 2024 |
| J.A.Skotnes Holding AS | | 2026 |
| Johansen Rørservice AS | Construction | 2017 |
| John Reinfjord AS | Construction | 1993 |
| Johnsen Bygg AS | Construction | 2025 |
| Kompass AS | Professional & scientific | 2002 |
| Kristof Holding AS | Construction | 2025 |
| Linvestas AS | | 2024 |
| Logomaskin AS | Health & social care | 2022 |
| Marvin Og Anders Moen Ans | Real estate | 1980 |
| MB Plast AS | Manufacturing | 2022 |
| Mghk Holding AS | | 2023 |
| Mirage Engineering AS | Real estate | 2013 |
| Møssaveien 10 AS | Real estate | 2003 |
| Nor Helgeland AS | Real estate | 2011 |
| Nord-Einnin AS | Other services | 2012 |
| Norrde Tech Team AS | Wholesale & retail | 2003 |
| Omar Cafe AS | Wholesale & retail | 2022 |
| Polytri AS | Professional & scientific | 2009 |
| På Tå AS | Health & social care | 2025 |
| Reinfjord Elektro AS | Construction | 1995 |
| Reinfjord Tømrer AS | Construction | 2025 |
| Rodal Vannverk SA | Water & waste | 2023 |
| Rør & Service AS | Construction | 2026 |
| Sand Høytørking Da | Agriculture & fishing | 2006 |
| Sande & Monsen AS | Real estate | 1982 |
| Skålvika Hyttegrend AS | Real estate | 2000 |
| Slåttøy Holding AS | Real estate | 2025 |
| Smeden Invest AS | Real estate | 2013 |
| Snekker Kristof AS | Construction | 2026 |
| Solåsen Invest AS | Transport & logistics | 2018 |
| Solåsen Utleie AS | Administrative & support | 2021 |
| Straumsås Eiendom AS | Real estate | 2018 |
| Sund Rådgivning Og Investering AS | Professional & scientific | 2008 |
| Sømna Biogass Eiendom AS | Energy | 2021 |
| Sømna Biogass Gårdsdrift SA | Wholesale & retail | 2020 |
| Sømna Blomster & Interiør AS | Wholesale & retail | 2021 |
| Sømna Bolig AS | Real estate | 2026 |
| Sømna Bussreiser AS | Transport & logistics | 2009 |
| Sømna Bygg AS | Construction | 2023 |
| Sømna Eiendom AS | Hospitality | 1998 |
| Sømna Fysiotrim AS | Health & social care | 1999 |
| Sømna Grønnsaklager SA | Transport & logistics | 1987 |
| Sømna Hud- Og Fotklinikk AS | Other services | 2019 |
| Sømna Hår Og Velvære AS | Other services | 2026 |
| Sømna Sentrumsbygg AS | Real estate | 2012 |
| Sømna Stillasutleie AS | Administrative & support | 2020 |
| Sømna Transport AS | Transport & logistics | 2007 |
| Sømna Vekst AS | Real estate | 2008 |
| TR Ingeniør Og Rådgivning AS | Professional & scientific | 2005 |
| Vatnir AS | Real estate | 2026 |
| Vennesund Camping AS | Hospitality | 2014 |
| Vennesund Eiendom AS | Real estate | 2014 |
| Veterinær Ida Marie Polland AS | Professional & scientific | 2025 |
| Vis Viva AS | Wholesale & retail | 2024 |
| Walstad Maskin AS | Construction | 2019 |
| Winter Mcbain AS | Professional & scientific | 2024 |
| Økoråd Sør-Helgeland SA | Professional & scientific | 1977 |