| Mayerling AS | Professional & scientific | 2012 |
| Mcmox AS | Information & communication | 2021 |
| Medikaisla Norge AS | Administrative & support | 2026 |
| Mgtt Holding AS | | 2021 |
| Michaelsen Investor AS | Wholesale & retail | 2016 |
| Midt Norsk Ventilasjon AS | Professional & scientific | 1998 |
| Mimic AS | Wholesale & retail | 1989 |
| MNL Bygg AS | Construction | 2011 |
| Moe & Moe AS | Education | 2025 |
| Mosjøen Regnskapskontor AS | Professional & scientific | 1966 |
| Motorservice Helgeland AS | Wholesale & retail | 2022 |
| MR Byggservice AS | Construction | 2012 |
| MTM Eiendom AS | Real estate | 2023 |
| Mtmc AS | Information & communication | 2015 |
| Myhre Olsen Holding AS | Wholesale & retail | 2011 |
| Mathisen Eiendommer AS | Real estate | 1975 |
| Müller Eiendom AS | Health & social care | 2011 |
| Napoli Restaurant & Hotell AS | Hospitality | 2018 |
| Nauste AS | Hospitality | 2020 |
| Nemesis AS | Financial services | 1997 |
| Nermoen Da | Agriculture & fishing | 2017 |
| Nett Og Elektronikkservice AS | Other services | 2005 |
| New Living Sandnessjøen AS | Real estate | 2016 |
| Newco Seaworks AS | Construction | 2016 |
| Nextcom-Itsp AS | Wholesale & retail | 2013 |
| Nikolai Rosø AS | Wholesale & retail | 2026 |
| Nomas AS | Professional & scientific | 1997 |
| Noraq AS | | 2023 |
| Nord Itc AS | Information & communication | 2020 |
| Nord Norsk Termorens AS | Manufacturing | 1999 |
| Nordland Rørinspeksjon AS | Construction | 2014 |
| Nordland Takst Og Fuktteknikk AS | Professional & scientific | 2024 |
| Nordnes Betong Og Anlegg AS | Manufacturing | 2020 |
| Nordnes Bygg & Eiendom AS | Construction | 2025 |
| Norhav Funding AS | Professional & scientific | 2008 |
| Norse Ocean AS | Wholesale & retail | 2020 |
| North Explore AS | Wholesale & retail | 2016 |
| North Inspection Sandnessjøen AS | Professional & scientific | 2024 |
| North Supply Da | Transport & logistics | 2008 |
| Northcore AS | Professional & scientific | 2022 |
| Northern Invest 115 AS | Real estate | 2012 |
| Northern Properties AS | Real estate | 2006 |
| Northern Services AS | Real estate | 2015 |
| Norwegian Cod Company AS | Agriculture & fishing | 2020 |
| Nothuset AS | Wholesale & retail | 1971 |
| Novikveien AS | Real estate | 1992 |
| NSC Invest AS | Administrative & support | 2025 |
| NT Holdings AS | Real estate | 2025 |
| Nummer 18 AS | Other services | 2017 |
| Nyheim Bygg Og Anlegg AS | Construction | 2024 |
| O Rønning Eiendom AS | Real estate | 2014 |
| O Rønning Kontor Og Data AS | Wholesale & retail | 1999 |
| Ocean Technology AS | Professional & scientific | 2017 |
| Oceaniq AS | | 2021 |
| Olaskjæret AS | Real estate | 2010 |
| Olje Compagniet AS | Wholesale & retail | 1995 |
| Omb Management AS | Financial services | 2010 |
| Onkel Oskar Eiendom AS | Real estate | 2018 |
| Onkel Oskar Sandnessjøen AS | Hospitality | 2013 |
| Opab AS | Administrative & support | 2025 |
| PCB Invest AS | Real estate | 2005 |
| Perg AS | Hospitality | 2012 |
| Perleporten AS | Wholesale & retail | 2016 |
| Pettcon AS | Real estate | 2006 |
| Pettersen & Sønn AS | Agriculture & fishing | 2024 |
| Pettersen Rådgiving AS | Professional & scientific | 2024 |
| Plasticity AS | | 2019 |
| Polarsirkelen Suvenir Ans | Arts & recreation | 1991 |
| Polartrade AS | Agriculture & fishing | 2011 |
| Porsengåsen AS | Professional & scientific | 2017 |
| Postgården Eiendom AS | Real estate | 1996 |
| Prestegården Næring AS | Real estate | 2021 |
| Primo Fysioterapi AS | Health & social care | 2014 |
| Pvjenssen AS | | 2022 |
| Pål Børholm Holding AS | Real estate | 2006 |
| Q-Ling AS | Administrative & support | 2020 |
| Radio Helgeland AS | Information & communication | 1989 |
| Radåsen AS | Real estate | 2025 |
| Radåsen Eiendom AS | Real estate | 2016 |
| Rakflæsa Invest AS | Real estate | 2022 |
| Rantom Invest AS | | 2021 |
| Raw Eiendom AS | Real estate | 2017 |
| Reklameservice Helgeland AS | Professional & scientific | 2021 |
| RH63 Eiendom AS | Real estate | 2015 |
| Ring-Eiendom AS | Real estate | 2005 |
| Ringkjøb Holding AS | Financial services | 2017 |
| Rishatten Eiendom AS | Real estate | 2012 |
| Risåsan AS | Hospitality | 2021 |
| RMC Properties AS | Real estate | 1992 |
| Rolf Nordnes Holding AS | | 2020 |
| Roy Valberg Holding AS | | 2026 |
| Rune Johansen Eiendom AS | Real estate | 2021 |
| Rune Johansen Transport AS | Transport & logistics | 2015 |
| Rune Johansen Transport Holding AS | Transport & logistics | 2018 |
| Rørleggerspesialisten AS | Construction | 2013 |
| S. Fab AS | Administrative & support | 2025 |
| Saga Regnskap Helgeland AS | Professional & scientific | 2014 |
| Salt Life AS | Water & waste | 2013 |
| Sandessjøen Montasje Og Sveis Da | Administrative & support | 2002 |
| Sandnes Eiendom AS | Real estate | 2002 |