| Metagama Services Limited | Professional & scientific | 2019 |
| Metropole Holding LP | | 2016 |
| Metropole L.P. | | 2014 |
| Metropole Management L.P. | | 2014 |
| Mfroadworks Limited | Construction | 2017 |
| MGM Joinery Ltd. | Construction | 2002 |
| Mgms Investments Ltd | Real estate | 2024 |
| Mgutt Ltd | Construction | 2025 |
| MH Fabrication Ltd | Manufacturing | 2019 |
| Mhoine Ecology Ltd | Professional & scientific | 2025 |
| Mhor Properties Limited | Households | 1995 |
| Mhor Services Ltd | Construction | 2025 |
| Miawatt Enterprises Ltd | Hospitality | 2014 |
| MIB Access Limited | Construction | 2024 |
| Michael Bonner Builders Ltd | Construction | 2026 |
| Michael Carver Photography Ltd | Professional & scientific | 2023 |
| Micro Organisms UK Ltd | Administrative & support | 2026 |
| MID Coul Farms Limited | Administrative & support | 2004 |
| MID Coul Renewables Limited | Administrative & support | 2013 |
| Midas Fine Jewellery Ltd | Wholesale & retail | 2019 |
| Midas Scottish Gold Collectors Ltd | Wholesale & retail | 2018 |
| Midas Scottish Gold Ltd | Wholesale & retail | 2018 |
| Middle Way Resources LP | | 2018 |
| Midfearn Distillery Company Limited | Other services | 2021 |
| Midmills Investments Limited | Financial services | 2021 |
| Miele's Gelateria Limited | Manufacturing | 2016 |
| Miele's Ice Cream Limited | Hospitality | 2017 |
| Migdale Smolt Limited | Agriculture & fishing | 1989 |
| Mike Fraser Joinery Ltd | Construction | 2014 |
| Millburn Inns Limited | Hospitality | 2014 |
| Millenium Dynamics LP | | 2016 |
| Milton Hotels Limited | Hospitality | 1992 |
| Milton of Leys Enterprise Ltd | Professional & scientific | 2014 |
| Milton of Leys Farmers | | 1999 |
| Minworth Trade LP | | 2018 |
| Mira Edit Ltd | Wholesale & retail | 2025 |
| Mirage Restaurant Limited | Hospitality | 2021 |
| Mitchell Engineering Services Ltd | Construction | 2026 |
| Mitchell's Healthcare Training Ltd | Public administration | 2025 |
| Mitchells Motorcycles Ltd. | Wholesale & retail | 2006 |
| Mithril Ventures Ltd | Information & communication | 2013 |
| MJ Macpherson & Sons Ltd | Manufacturing | 2024 |
| MJH Estates Ltd | Extraterritorial | 2026 |
| MJR Marine Consultancy Ltd | Administrative & support | 2013 |
| MK Holiday Cleaning Ltd | Administrative & support | 2025 |
| MM Highland Properties Ltd | Real estate | 2024 |
| MM NB Takeaway Ltd | Hospitality | 2021 |
| MMP Blyth Holdings Ltd | Wholesale & retail | 2022 |
| MNM Representations Limited | Other services | 2023 |
| Modayo Ltd | Health & social care | 2026 |
| Mode Plumbing & Heating Services Ltd | Construction | 2018 |
| Moighe Mackay Scaff Ltd | Construction | 2026 |
| Moir Hydromorphology Ltd | Professional & scientific | 2019 |
| Molly's Inverness Ltd | Hospitality | 2023 |
| Mondo Corporation L.P. | | 2014 |
| Monga UK Enterprises Ltd | Transport & logistics | 2025 |
| Moniack Mhor Limited | Arts & recreation | 1991 |
| Mono Management L.P. | | 2014 |
| Mono Trade L.P. | | 2014 |
| Monster Cabs Ltd | Transport & logistics | 2020 |
| Monster Clean A82 Limited | Administrative & support | 2025 |
| Monster Clean Highlands Ltd | Administrative & support | 2025 |
| Monster Giveaways Ltd | Wholesale & retail | 2021 |
| Monster Homes Ltd | Hospitality | 2025 |
| Monster Taxis Ltd | Transport & logistics | 2020 |
| Monsterbike Limited | Wholesale & retail | 2022 |
| Montenegro Investments Limited | Real estate | 2025 |
| Montgomery Motors (Inverness) Ltd | Wholesale & retail | 2026 |
| Moorway International Solutions LP | | 2018 |
| Moran Power LP | | 2016 |
| Moray and Aberdeen Builders Ltd | Construction | 2008 |
| Moray Fire & Security Ltd | Extraterritorial | 2025 |
| Moray Fire Extinguishers Ltd | Extraterritorial | 2025 |
| Moray Fire Ltd | Extraterritorial | 2025 |
| Moray Fire Protection (Scotland) Ltd | Administrative & support | 2025 |
| Moray Firth Divers Limited | Extraterritorial | 1986 |
| Moray Firth Fireworks Ltd | Arts & recreation | 2011 |
| Moray Firth Heating Services Limited | Construction | 2013 |
| Moray Firth Marine & Offshore Consultants Ltd | Professional & scientific | 2024 |
| Moray Firth Motors Ltd. | Wholesale & retail | 2003 |
| Moray Holdings Limited | Hospitality | 1992 |
| Moray Leisure (Trading) Limited | Arts & recreation | 1993 |
| Moray Leisure Limited | Arts & recreation | 1993 |
| Moray Ocean Community CIC | Professional & scientific | 2024 |
| Moray Properties Limited | Real estate | 2002 |
| Moray Utilities Ltd | Energy | 2023 |
| Moraystone Property Management Ltd | Hospitality | 2024 |
| More Property Group Ltd | Real estate | 2026 |
| Morisonit Capital LP | | 2016 |
| Morningfield Electrical Limited | Construction | 2013 |
| Morov Ltd | Agriculture & fishing | 2023 |
| Morridon Electrical Limited | Mining & quarrying | 2007 |
| Morrison Accountancy Limited | Professional & scientific | 2017 |
| Morven Inverness Limited | Health & social care | 2013 |
| Moss and Marble Competitions Ltd | Arts & recreation | 2025 |
| Mossom Limited | Education | 2010 |
| Mothergraze Ltd | Hospitality | 2026 |
| Motor Parts (Fraserburgh) Limited | Wholesale & retail | 2004 |
| Motovision Ltd | Wholesale & retail | 2018 |
| Mottainai Ltd | Other services | 2017 |