| Mel Gardermoen 19 AS | Real estate | 2021 |
| Mel Heia 34 AS | Real estate | 2022 |
| Microbits Nuf | Information & communication | 2010 |
| Midtvold Consulting AS | Professional & scientific | 2020 |
| Minnesund Eiendom AS | Real estate | 2018 |
| Miomi AS | | 2020 |
| MKB AS | Health & social care | 2023 |
| MM Eiendom AS | Professional & scientific | 2010 |
| Moch AS | | 2024 |
| Moderne Konstruksjoner AS | Construction | 2026 |
| Moffa AS | Professional & scientific | 2022 |
| Mukachevo Green Oil Exploration AS | | 2021 |
| Mundal Mobilconsult AS | Information & communication | 2013 |
| Music Baron AS | Information & communication | 2025 |
| Mynlove AS | Wholesale & retail | 2021 |
| Mysu AS | Financial services | 2015 |
| Møljen AS | Wholesale & retail | 2022 |
| Møller & Jensen Eiendom AS | Wholesale & retail | 2002 |
| Nad Invest AS | Real estate | 2017 |
| Nafeh Invest AS | | 2024 |
| Nanna Eir AS | Financial services | 2017 |
| Nasjonal AS | Real estate | 2026 |
| Netbooking AS | Information & communication | 2013 |
| New Century AS | Real estate | 2000 |
| Nimble Mind AS | Professional & scientific | 2015 |
| Nomi-Holding AS | | 2026 |
| Nor-Ide AS | Wholesale & retail | 1993 |
| Nordic Popcorn AS | Wholesale & retail | 2015 |
| Norica AS | Real estate | 2001 |
| Norsk Bolig Og Prosjektutvikling AS | | 1996 |
| Northern Field Studio AS | Information & communication | 2023 |
| Northfoxx AS | Information & communication | 2023 |
| Norwegian Apartments and Property Rental AS | Real estate | 2016 |
| Norwegianpharmafluids AS | Wholesale & retail | 2016 |
| NRV AS | Real estate | 2020 |
| Omitofu AS | Real estate | 2004 |
| Oncom Ltd Nuf | Information & communication | 2020 |
| Optiai AS | Information & communication | 2025 |
| Optoma Scandinavia AS | Wholesale & retail | 2001 |
| Oslo Watch Club AS | Wholesale & retail | 2021 |
| Ov Entreprenør AS | Construction | 2024 |
| Ovali Consulting AS | Professional & scientific | 2022 |
| Peculio AS | Professional & scientific | 2016 |
| Pikelus AS | Professional & scientific | 2014 |
| Presttun Invest AS | | 2021 |
| Procas AS | Real estate | 2004 |
| Prosjekt- Og Banekompetanse AS | Professional & scientific | 2019 |
| Protect Produkter AS | Wholesale & retail | 1999 |
| Ragnar Reitan Holding AS | | 2017 |
| Rapp Holding AS | | 2019 |
| Rasta Apotek AS | Wholesale & retail | 2025 |
| Rasta Bil AS | Wholesale & retail | 2019 |
| Rasta Legesenter AS | Health & social care | 2015 |
| Rasta Senter Seksjon 2 AS | Real estate | 2001 |
| RB Rør & Bad AS | Construction | 2023 |
| Re.Bell AS | | 2022 |
| Reconfig Systems AS | Real estate | 2026 |
| Reitbakk AS | | 2026 |
| RH Kjøleservice AS | Wholesale & retail | 2023 |
| Rip&Sip AS | Wholesale & retail | 2026 |
| Rix Mekanik AS | Manufacturing | 1998 |
| Romerike Næringsmegling AS | Real estate | 1997 |
| Ronny Bergstrøm Holding AS | Financial services | 2012 |
| Rowi AS | Real estate | 2017 |
| Rti Consult AS | Professional & scientific | 2020 |
| Rust Invest AS | Financial services | 2012 |
| Røkke Holding AS | | 2025 |
| S Risberg Holding AS | | 2026 |
| S S a Invest AS | Real estate | 2013 |
| S-Buss AS | Transport & logistics | 1982 |
| Sea Xperience AS | Administrative & support | 2023 |
| Secure AI AS | Information & communication | 2024 |
| Sentimentminds AS | | 2023 |
| Serveringsgjengen AS | Hospitality | 2014 |
| SH Eiendomsinvest AS | Real estate | 2020 |
| Sh-Bygg Holding AS | Real estate | 2021 |
| Silver City AS | Arts & recreation | 2016 |
| Sima Consulting AS | Professional & scientific | 2021 |
| Sivil AS | Information & communication | 2025 |
| Skasliens AS | | 2020 |
| Skjetne AS | Financial services | 2020 |
| Skriv Akademisk AS | Education | 2023 |
| Skrivervegen AS | Real estate | 2021 |
| Skutill AS | Professional & scientific | 2026 |
| Smia Invest AS | | 2025 |
| Smoke Hill AS | Real estate | 2021 |
| Snakknorsk AS | Education | 2021 |
| Snowproduction AS | Energy | 2016 |
| Solberg Solutions AS | Administrative & support | 2012 |
| Solheim Bygg Og VVS AS | Construction | 2012 |
| Soto Mayne AS | | 2022 |
| SPZ Holding AS | Financial services | 2005 |
| Ssa-Sn Holding AS | Financial services | 2015 |
| Star Pizza Ans | Hospitality | 2000 |
| Steen Invest AS | Real estate | 2023 |
| Steinar Stolen AS | Wholesale & retail | 1986 |
| Step Renhold AS | Administrative & support | 2015 |
| Stephold AS | Information & communication | 2019 |
| Stilsnekker'N AS | Construction | 2023 |
| Strand Eiendom Holding AS | Real estate | 2017 |