| MS Frisør AS | Other services | 2023 |
| Murv Holding AS | | 2019 |
| Muv Eiendom AS | Real estate | 2022 |
| Muv Holding AS | Administrative & support | 2022 |
| Mähler Och Söner Norge AS | Wholesale & retail | 2014 |
| Mælabakken AS | Real estate | 2020 |
| N. Munkhaugen AS | Arts & recreation | 2014 |
| N. Munkhaugen Holding AS | Arts & recreation | 2015 |
| Nadia Invest AS | Real estate | 2020 |
| Nakama AS | Wholesale & retail | 2020 |
| Namsen Fritid AS | Wholesale & retail | 2020 |
| Naprapaten Melhus AS | Health & social care | 2013 |
| Nesterov AS | Transport & logistics | 2018 |
| Nestor Bil AS | Wholesale & retail | 2002 |
| NH Melhusbygg AS | Construction | 2007 |
| Nideng Brøyting Og Transport AS | Transport & logistics | 2018 |
| Nideng Ingeniørtjenester AS | Professional & scientific | 2019 |
| Nora Selvaag AS | | 2026 |
| Nordgarden Eiendomsutvikling AS | Real estate | 2022 |
| Nordic Display AS | Professional & scientific | 2016 |
| Nordic Servise Og Transport AS | Transport & logistics | 2025 |
| Nordisk Sauna Da | Administrative & support | 2025 |
| Nordiske Stålbygg AS | Construction | 2008 |
| Nordløkken Holding AS | Financial services | 2014 |
| Norgeshus AS | Professional & scientific | 1988 |
| Norgeshus Eiendom AS | Real estate | 2008 |
| Norgeshus Eiendomsutvikling AS | Real estate | 2023 |
| Norgeshus Global Homes AS | Wholesale & retail | 2024 |
| Norgeshus Gruppen AS | Professional & scientific | 2008 |
| Northsouth AS | Real estate | 2025 |
| Northwind Group AS | | 2026 |
| Northwind Trucks AS | Wholesale & retail | 2026 |
| Norwaters Holding AS | Manufacturing | 2013 |
| Noxon AS | Professional & scientific | 2018 |
| Næringsdrift AS | Real estate | 1985 |
| O. Øye AS | Construction | 2021 |
| O. Øye Holding AS | Construction | 2020 |
| Octax AS | Information & communication | 2026 |
| Ojn Holding AS | | 2022 |
| Ola Nordhammer Holding AS | | 2024 |
| Ola Sandrød Holding AS | | 2021 |
| Oliver-Holding AS | Real estate | 2018 |
| Om Hansen Holding AS | Administrative & support | 2020 |
| Opland Maskin AS | Construction | 2020 |
| Oppistu Utbygging AS | Real estate | 2018 |
| Oppstu Samdrift Da | Agriculture & fishing | 2005 |
| Orixs AS | Administrative & support | 2025 |
| Orixs Holding AS | Administrative & support | 2024 |
| Osloveien 18B AS | Real estate | 2017 |
| Ovdin AS | Manufacturing | 2015 |
| Pajh Invest AS | Real estate | 2013 |
| Per Ståle Aarstad Invest AS | Construction | 2014 |
| Pero Invest AS | | 2005 |
| Petroconsult AS | Professional & scientific | 2024 |
| Pilken Holding AS | | 2024 |
| Pilus AS | Wholesale & retail | 2005 |
| Pipez AS | | 2021 |
| PKD Holding AS | Real estate | 2017 |
| Plaque AS | Health & social care | 2005 |
| Pluss Service AS | Administrative & support | 2020 |
| Pottenvegen AS | Real estate | 2019 |
| Prestbakken Skogsveglag | Agriculture & fishing | 1995 |
| Profil-Fasade AS | Construction | 1986 |
| Prøven Transport AS | Transport & logistics | 1992 |
| Puls Grunnarbeid Og Betong AS | Construction | 2025 |
| Pål Rygg AS | Education | 2012 |
| R K Utleie AS | Transport & logistics | 2025 |
| Ralg Holding AS | Information & communication | 2026 |
| Rambraut Invest AS | Wholesale & retail | 2019 |
| Rambrauttunet AS | Real estate | 2019 |
| Rapbjørg Pukkverk AS | Mining & quarrying | 2018 |
| Raphaug Holding AS | | 2019 |
| Rathe AS | Wholesale & retail | 1995 |
| Rathe Holding AS | Professional & scientific | 2021 |
| Rathus AS | Real estate | 2021 |
| Realservice AS | Construction | 2008 |
| Renholdere AS | Administrative & support | 2020 |
| Rian Holding AS | Real estate | 2012 |
| Riise-Invest AS | Professional & scientific | 2019 |
| Riset Flisdesign AS | Construction | 2024 |
| Rivers AS | | 2025 |
| Roblu Holding AS | | 2023 |
| Roksvaag Kompetanse AS | | 2005 |
| Roli Drift Da | Real estate | 2010 |
| Rono Holding AS | Transport & logistics | 2005 |
| Ross Snekkertjenester AS | Construction | 2004 |
| Rosten Autosenter AS | Wholesale & retail | 2007 |
| Royale Invest AS | | 2022 |
| RPM Motorservice AS | Manufacturing | 2026 |
| Rødde Folkehøgskole AS | Education | 2014 |
| Rødde Holding AS | | 2022 |
| Rødseth Holding AS | Real estate | 2021 |
| Rønningen Panorama AS | Real estate | 2025 |
| Rørtjenesten AS | Construction | 2012 |
| Saah 994 Holding AS | | 2023 |
| Sabrura Melhus AS | Hospitality | 2022 |
| Safety Leaders AS | Mining & quarrying | 2023 |
| Safy AS | Information & communication | 2025 |
| Saga Prosjekt AS | Real estate | 2006 |
| Sandvold Malerservice AS | Construction | 2011 |