| Luly Holding AS | | 2021 |
| Luna Holdings AS | | 2019 |
| Lunde Capital AS | Real estate | 2007 |
| Lunde Eiendomsutvikling AS | Real estate | 2016 |
| LWJ Holding AS | Hospitality | 2020 |
| Lysholm Holding AS | | 2012 |
| Lysthusflata AS | Real estate | 2022 |
| Ma Holding AS | Real estate | 2005 |
| Magne Staveli & Co AS | Wholesale & retail | 1980 |
| Maling 1000 Orkanger AS | Wholesale & retail | 2020 |
| Mardahl Eiendom AS | Real estate | 2013 |
| Mardahl Holding AS | Real estate | 2014 |
| Mardahl Industri AS | Mining & quarrying | 2005 |
| Mardahl Invest AS | Construction | 2023 |
| Mardahl Miljøteknologi AS | Professional & scientific | 2024 |
| Mardahl Verksted AS | Other services | 2003 |
| Marius Rindal Holding AS | Financial services | 2014 |
| Matmentor AS | Education | 2020 |
| Maxgym Orkanger AS | Arts & recreation | 2010 |
| Melhus Bil Orkanger AS | Wholesale & retail | 2014 |
| Melketeknikk Midt-Norge AS | Wholesale & retail | 2006 |
| Merlin Kids Orkanger AS | Wholesale & retail | 2011 |
| Midtnorsk Sprøytebetong Og Injeksjon AS | Construction | 2018 |
| Miljøpartnerne AS | Water & waste | 2008 |
| Minstasjon AS | Wholesale & retail | 2011 |
| Moa Eiendom AS | Real estate | 2011 |
| Molla AS | Other services | 2000 |
| Moment Kommunikasjon AS | Professional & scientific | 2007 |
| Monte Rosa AS | Hospitality | 2003 |
| Murerfirmaet Juel Thomsen | Construction | 2013 |
| Nardo Bil Eiendom Orkanger AS | Real estate | 2007 |
| Nardo Bil Orkanger AS | Wholesale & retail | 1991 |
| Nerøra Holding AS | | 2022 |
| Nexus Ikt AS | Information & communication | 2026 |
| Nexusnor AS | Professional & scientific | 2026 |
| Nordlys Invest AS | Financial services | 2017 |
| Nordmarc AS | Wholesale & retail | 2026 |
| Norpark AS | Hospitality | 2015 |
| Norsk Kylling AS | Manufacturing | 1998 |
| Norsk Pu Coating AS | Manufacturing | 2006 |
| Nova Housing AS | | 2012 |
| Nova Investments AS | Financial services | 2012 |
| Novalink AS | Financial services | 2017 |
| O&K Utomhus AS | Construction | 2025 |
| O-Rostad Holding AS | Wholesale & retail | 2014 |
| Oef AS | Real estate | 2015 |
| Oef Utleie AS | Real estate | 2019 |
| Oim Norway AS | Professional & scientific | 2026 |
| Ois Holding AS | | 2021 |
| Olav Johansen Holding AS | Real estate | 2015 |
| Oldus Eiendom AS | Real estate | 2019 |
| Oldus Holding AS | Real estate | 2015 |
| Omt AS | Financial services | 2012 |
| On Arkitekter Og Ingeniører AS | Professional & scientific | 2008 |
| Ope Eiendom AS | Real estate | 2020 |
| Optimal Management AS | Professional & scientific | 2020 |
| Optimal Regnskap AS | Professional & scientific | 2004 |
| Oris Mek Holding AS | | 1991 |
| Orkanger Containerterminal AS | Transport & logistics | 2020 |
| Orkanger Fysioterapi Og Osteopati AS | Health & social care | 1998 |
| Orkanger Parfymeri AS | Wholesale & retail | 1953 |
| Orkanger Pizza AS | Hospitality | 2017 |
| Orkanger Specsavers AS | Wholesale & retail | 2010 |
| Orkanger Ur Og Optikk AS | Wholesale & retail | 2003 |
| Orkdal Bilskade AS | Other services | 2023 |
| Orkdal Blomster AS | Wholesale & retail | 2000 |
| Orkdal Eiendom AS | Real estate | 2001 |
| Orkdal Gjenvinning AS | Water & waste | 2016 |
| Orkdal Grill & Pizza AS | Hospitality | 2015 |
| Orkdal Håndverksservice AS | Manufacturing | 2000 |
| Orkdal Legesenter AS | Health & social care | 2017 |
| Orkdal Trafikkskole AS | Education | 2025 |
| Orkdal Transport Holding AS | Transport & logistics | 2013 |
| Orkdal Utmarksråd | Other services | 2004 |
| Orkdal Øyeklinikk AS | Health & social care | 2014 |
| Orkdalsvegen 35 AS | Real estate | 2010 |
| Orkdalsvegen AS | Construction | 2001 |
| Orkdalsveien 49 AS | Real estate | 2012 |
| Orkdalsveien 84 AS | Real estate | 2015 |
| Orkdalsøren Kapital AS | | 2025 |
| Orkedalsv 56 AS | Real estate | 1998 |
| Orkla Blikk & Ventilasjon AS | Construction | 2024 |
| Orkla Camping AS | Hospitality | 2026 |
| Orkla Credit AS | Administrative & support | 1987 |
| Orkla Eiendomsmegling AS | Real estate | 2014 |
| Orkla Engineering AS | Professional & scientific | 2006 |
| Orkla Entreprenør AS | Construction | 2000 |
| Orkla Gass AS | Wholesale & retail | 2011 |
| Orkla Gjestegård AS | Hospitality | 2012 |
| Orkla Invest AS | Construction | 2007 |
| Orkla Isolerglass AS | Manufacturing | 1980 |
| Orkla Mardahl AS | Construction | 1972 |
| Orkla Nova AS | Professional & scientific | 2025 |
| Orkla Produkter Ans | Manufacturing | 2000 |
| Orkla Renhold AS | Administrative & support | 2009 |
| Orkla Shipping & Trading AS | Transport & logistics | 1981 |
| Orkla Sparebank | Financial services | 1841 |
| Orkla Stålkonsult AS | Construction | 2007 |
| Orkla Takst AS | Real estate | 2014 |
| Orkla Uteservice AS | Administrative & support | 2023 |