| MPH Scotland Ltd | Transport & logistics | 2022 |
| MPI (Dornoch) Limited | Real estate | 2016 |
| MPI (Elgin) Limited | Real estate | 2016 |
| MR and MRS D F Sutherland Home Farms | | 2026 |
| MR Prime Delivery Ltd | Transport & logistics | 2026 |
| MR Prime Properties Ltd | Hospitality | 2025 |
| MR Property Improvements Ltd | Construction | 2026 |
| MR Radiology Limited | Health & social care | 2013 |
| MR Wilson Joinery Ltd | Construction | 2024 |
| MRB Property Services Ltd | Households | 2023 |
| MRD Capital Limited | Financial services | 2026 |
| MRD Energyworx Limited | Construction | 2026 |
| MRF Access Ltd | Professional & scientific | 2024 |
| MRG (Scotland) Limited | Wholesale & retail | 2006 |
| MRG Holdings Inverness) Ltd | Financial services | 2023 |
| MRM Rigging Ltd | Manufacturing | 2018 |
| MRN Digital Ltd | Information & communication | 2024 |
| MRN Direct Ltd | Wholesale & retail | 2023 |
| MTG OPS 121 Ltd | Administrative & support | 2023 |
| MTG OPS 301 Ltd | Administrative & support | 2021 |
| MTG OPS 361 Ltd | Administrative & support | 2021 |
| MU Electrical Limited | Construction | 2022 |
| Muirtown Developments Ltd | Real estate | 2010 |
| Mull Gift Co Ltd | Wholesale & retail | 2026 |
| Multi Trade Accents LP | | 2018 |
| Multifield Impacts LP | | 2016 |
| Multinational L.P. | | 2015 |
| Multinational Trade L.P. | | 2014 |
| Multistar Capital LP | | 2016 |
| Munro & Noble Financial Services Limited | Financial services | 2002 |
| Munro & Noble Group Limited | Professional & scientific | 2020 |
| Munro & Noble LLP | | 2026 |
| Munro Civil Engineering Limited | Construction | 2022 |
| Munro Civils Limited | Extraterritorial | 2022 |
| Munro Electrics Ltd | Construction | 2019 |
| Munro Floors Limited | Construction | 2010 |
| Munro Plumbing & Heating Services Limited | Construction | 2026 |
| Munro's Nurseries Limited | Wholesale & retail | 2021 |
| Munro's Property Ltd | Real estate | 2021 |
| Muporion Limited | Manufacturing | 2025 |
| Murchison Law Limited | Professional & scientific | 2010 |
| Murdoch Fraser Properties Limited | Households | 2025 |
| Murphy Universal LP | | 2016 |
| Murray Fraser Appliances Limited | Other services | 2018 |
| Murray Musettes Limited | Wholesale & retail | 2015 |
| Murray Travel Group Ltd | Administrative & support | 2013 |
| Murray Travel Tour Operating Ltd | Administrative & support | 2023 |
| Murx 3D Ltd | Manufacturing | 2026 |
| My Doctor’S Recipe Ltd | Wholesale & retail | 2016 |
| Mydan Holdings Ltd | Wholesale & retail | 2024 |
| Myles Evans & Co Limited | Administrative & support | 2003 |
| Mythos Safety Consultants Limited | Health & social care | 2025 |
| Mór-Ríoghain Ltd | Other services | 2019 |
| N a Highland Ltd | Hospitality | 2019 |
| N Jack Property Ltd | Real estate | 2025 |
| N R Holland Engineering Ltd | Manufacturing | 2009 |
| N Robinson Ltd | Professional & scientific | 2026 |
| N500 Holdings Ltd | Real estate | 2017 |
| Nairn Book & Arts Festival | Arts & recreation | 2005 |
| Nairn Financial Planning Limited | Professional & scientific | 2024 |
| Nairn Show Limited | Extraterritorial | 2004 |
| Nairnside Ltd | Real estate | 2009 |
| Naitral Ltd | Financial services | 2012 |
| Nallamilli Consultancy Limited | Health & social care | 2023 |
| Namaste Inbhir NIS Ltd | Hospitality | 2024 |
| Nano Core Energy Limited | Manufacturing | 2026 |
| Nanostream Future Energy Ltd | Manufacturing | 2026 |
| NAT Hotel Limited | Administrative & support | 2011 |
| Nationwest Capital L.P. | | 2014 |
| Nationwide Alliance L.P. | | 2014 |
| Nature Bingo CIC | Education | 2025 |
| Nature Bingo Games Ltd | Education | 2025 |
| Nautis Enterprise LP | | 2016 |
| Navtor Trading LP | | 2017 |
| NC500 Official Finish Limited | Administrative & support | 2026 |
| NC500 Official Start & Finish Limited | Administrative & support | 2026 |
| NC500 Official Start Limited | Hospitality | 2025 |
| NC500 OS Limited | Hospitality | 2025 |
| NDA Prime Services Ltd | Construction | 2022 |
| NE Access Services Ltd | Professional & scientific | 2025 |
| Necessity Scaffolding Services Ltd | Construction | 2025 |
| Neck and Square Limited | Other services | 2019 |
| Need to Know Ltd. | Professional & scientific | 2001 |
| Neil Griffin Roughcasting Ltd. | Construction | 2017 |
| Neil Macgregor Contracting & Plant Hire Limited | Construction | 2024 |
| Neil Ross (Consulting Engineers) Ltd | Professional & scientific | 2015 |
| Neill & Co. Financial Services Limited | Financial services | 1986 |
| Neilson Plant & Contracting Ltd | Construction | 2025 |
| Nelu Tafta Construction Ltd | Construction | 2023 |
| Ness & Beauly Fisheries Trust | Other services | 2005 |
| Ness Apartments Ltd | Real estate | 2026 |
| Ness Aviation Ltd | Arts & recreation | 2020 |
| Ness Barbers Ltd | Other services | 2020 |
| Ness Biosensors Ltd | Manufacturing | 2021 |
| Ness Blinds & Floors Ltd | Construction | 2022 |
| Ness Castle Engineering Ltd | Mining & quarrying | 2020 |
| Ness Castle Lodges Limited | Agriculture & fishing | 1991 |
| Ness Castle Property Ltd | Households | 2026 |
| Ness Consulting (Highland) Ltd | Professional & scientific | 2025 |
| Ness Drinks Ltd | Manufacturing | 2020 |