| Midtvedt Helse AS | Health & social care | 2020 |
| Mika Byggtjenester AS | Construction | 2013 |
| Miljø Diagnostics AS | Wholesale & retail | 2023 |
| Mind Technologies AS | Information & communication | 1983 |
| Mindstreet AS | Information & communication | 2005 |
| Mint Auto AS | Wholesale & retail | 2026 |
| Misty AS | Real estate | 2005 |
| MJ Partner Holdings AS | Administrative & support | 2020 |
| MK Lego AS | Construction | 2022 |
| Modig AS | Professional & scientific | 2025 |
| Monsrud Invest AS | | 2022 |
| Morten Hustad AS | Arts & recreation | 2015 |
| MT Kristian Iversen AS | Health & social care | 2026 |
| Møer AS | Professional & scientific | 2017 |
| Nanoeta AS | | 2023 |
| Navnelapper Pro AS | Information & communication | 2023 |
| Nedre Opsahl AS | Other services | 2022 |
| Neegaard Investment AS | Real estate | 2019 |
| Neo Italian Style AS | Wholesale & retail | 2026 |
| Nim Supplement AS | Professional & scientific | 2019 |
| Nit Norge AS | | 2022 |
| Nordic Convenience Group AS | Wholesale & retail | 2013 |
| Nordisk Logistikk AS | Transport & logistics | 2014 |
| Norgescatering AS | Manufacturing | 1993 |
| Norsk Informasjons Teknikk Ans | | 1990 |
| Norsonic AS | Manufacturing | 1967 |
| Norvessa AS | Wholesale & retail | 2026 |
| Nye Raaum Og Fjære AS | | 2026 |
| Nylandas AS | Construction | 2018 |
| Nytorget Handel AS | Real estate | 2004 |
| Nærbakst AS | Manufacturing | 1997 |
| Nærbakst Handel AS | Wholesale & retail | 2000 |
| Nærbakst Øst AS | Manufacturing | 2000 |
| Oelberg Holding AS | | 2019 |
| Orabliss AS | Wholesale & retail | 2025 |
| Orions Hage AS | | 2017 |
| Oslo Og Akershus Turbusser AS | Transport & logistics | 1996 |
| Pa Consulting AS | Wholesale & retail | 2020 |
| Pao Invest AS | | 2005 |
| Parneet Transport AS | Transport & logistics | 2021 |
| Parskolen SA | Education | 2021 |
| Pebbles Invest AS | | 2019 |
| Per H Stokke AS | Construction | 1992 |
| PNW Holding AS | | 2017 |
| Ponderosa Holding AS | Construction | 2024 |
| Powerinvest AS | Construction | 2019 |
| Priykala AS | Hospitality | 2026 |
| Pro Deck AS | Arts & recreation | 2013 |
| Promo AS | Administrative & support | 2003 |
| Promotion AS | Wholesale & retail | 2024 |
| Proplast Holding AS | Manufacturing | 2018 |
| Protector AS | Information & communication | 1998 |
| Pure Living AS | Information & communication | 2007 |
| Purple Tech AS | Information & communication | 2016 |
| Påstell AS | Administrative & support | 2026 |
| Raaum Og Fjære AS | Manufacturing | 2005 |
| Raaum Og Fjære Holding AS | | 2026 |
| Rakett AS | Information & communication | 2023 |
| RCA12 AS | Construction | 2017 |
| Recap AS | Real estate | 2024 |
| Ref Consult AS | Professional & scientific | 1987 |
| Ref Holding AS | Professional & scientific | 2005 |
| Remote Festival Da | Arts & recreation | 2013 |
| Rewa AS | | 2021 |
| Rezaie AS | Transport & logistics | 2026 |
| Ring Green Holding AS | | 2022 |
| Ringeriksveien 342 AS | Real estate | 2015 |
| Rognmo AS | Construction | 1990 |
| Roha Consulting AS | Professional & scientific | 2019 |
| Said Tatby Transport AS | Transport & logistics | 2012 |
| Seksten Femti AS | Real estate | 2006 |
| Shirin Jo AS | | 2025 |
| Siena Consulting AS | Information & communication | 2003 |
| Sivilingeniør Knut Mørkeseth AS | Professional & scientific | 1998 |
| Sivilingeniør Sture Hedløv AS | Wholesale & retail | 1984 |
| Skadi Bygg AS | Construction | 2025 |
| Skui Bo Og Omsorgshjem Da | Health & social care | 2006 |
| Slemdal Consulting AS | Information & communication | 2025 |
| Slåttebråtan Holding AS | | 2021 |
| Small Step Technologies AS | Information & communication | 2024 |
| Solvang Family Holding AS | | 2024 |
| Soudal AS | Wholesale & retail | 2005 |
| Space Holding AS | Real estate | 2015 |
| Spiceroute AS | Wholesale & retail | 2026 |
| Spinecrest Holding AS | | 2026 |
| Stenbakk Consult AS | Professional & scientific | 2025 |
| Stensrud Forvaltning AS | Real estate | 2020 |
| Stitt Holding AS | | 2021 |
| Storveien 123 AS | Real estate | 2025 |
| Sundt & Thomassen AS | Professional & scientific | 1981 |
| Super Pump AS | Wholesale & retail | 2025 |
| Svein Løvland AS | Financial services | 2005 |
| Sverre Klemetsdal AS | Financial services | 2003 |
| Synnea Technologies AS | Information & communication | 2022 |
| Sørkastveien SA | Real estate | 1969 |
| Sørsdal Transport AS | Transport & logistics | 2010 |
| Sørum Gård Ans | Agriculture & fishing | 1998 |
| T-Mørke Invest AS | Professional & scientific | 2012 |
| Takst Og Boligtjenester AS | Real estate | 2019 |
| Tandberg Foto AS | | 2023 |