| Mack the Knife Limited | Health & social care | 2024 |
| Mack. Properties Ltd | Real estate | 2012 |
| Mackay Travel Limited | Administrative & support | 2017 |
| Mackenzie Hughes Services Ltd | Mining & quarrying | 2019 |
| Mackie Motors (Brechin) Limited | Wholesale & retail | 1979 |
| Mackies Auto Centre Limited | Wholesale & retail | 2022 |
| Mackintosh GIN Limited | Manufacturing | 2018 |
| Maclaurin Management Consulting Ltd | Professional & scientific | 2022 |
| Maclavic Group Limited | Wholesale & retail | 2025 |
| Maclean Transport Solutions Scotland Limited | Transport & logistics | 2022 |
| Macmarine Marine Solutions Limited | Professional & scientific | 2023 |
| Macmhuirich Ltd | Information & communication | 2023 |
| Macnabs Trustees Ltd | Professional & scientific | 2017 |
| Maco Project Services Ltd | Construction | 2018 |
| Macphail's Motor Mechanic Ltd | Wholesale & retail | 2019 |
| Macpherson Property Company Limited | Hospitality | 1997 |
| Macrae Properties Limited | Real estate | 2019 |
| Macro (Dundee) Limited | Hospitality | 2024 |
| Macwilson Group Limited | Professional & scientific | 2010 |
| Made YOU Smile Ltd | Health & social care | 2025 |
| Madera Developments Limited | Construction | 2019 |
| Madera Joinery (Scotland) Ltd | Construction | 2025 |
| Madga Limited | Hospitality | 2025 |
| Madgenesis Limited | Professional & scientific | 2026 |
| Madhouse Autovalets Ltd | Wholesale & retail | 2024 |
| Madina Delights Ltd | Hospitality | 2020 |
| Madina Takeaway Dundee Ltd | Hospitality | 2026 |
| Madjokings Limited | Construction | 2025 |
| Madla Limited | Wholesale & retail | 2010 |
| Madlock Accents LP | | 2017 |
| Maeva Commercial Limited | Construction | 2022 |
| Maeva Retail Limited | Wholesale & retail | 2023 |
| Mafalda Media Limited | Professional & scientific | 2019 |
| MAG Business LP | | 2016 |
| Magdalen Green Consultants Limited | Professional & scientific | 2025 |
| Maggeore Property Company Limited | Real estate | 2003 |
| Magic Penguin Ltd | Information & communication | 2024 |
| Magic Property Services Limited | Administrative & support | 2023 |
| Magic Scissors Lochee Ltd | Other services | 2025 |
| Maglum Limited | Construction | 2015 |
| Magnifica Property Ltd | Real estate | 2024 |
| MAH Hoos Brewing Ltd | Manufacturing | 2022 |
| Mahaba Limited | Wholesale & retail | 2025 |
| Mahl Properties Limited | Real estate | 2005 |
| MAID2CLEAN East Scotland Limited | Administrative & support | 2012 |
| Mainport Sales L.P. | | 2013 |
| Mains Castle Dundee Ltd | Hospitality | 2017 |
| Mains Joinery Ltd | Construction | 2022 |
| Mains Properties Ltd | Real estate | 2026 |
| Maintenex Ltd | Professional & scientific | 2014 |
| Maione Limited | Wholesale & retail | 2025 |
| Maisha Care at Home Limited | Health & social care | 2026 |
| Maison NOX Limited | Wholesale & retail | 2025 |
| Maisonbf Ltd | Hospitality | 2023 |
| Maitland Auto Centre Limited | Wholesale & retail | 2025 |
| Majaco Ltd | Real estate | 2022 |
| Majesty Tastes Ltd | Hospitality | 2025 |
| MAK (Scotland) Limited | Real estate | 2016 |
| MAK Accountants (Scotland) Ltd | Professional & scientific | 2024 |
| Makada Trading Limited | Wholesale & retail | 2022 |
| Makar Technologies Limited | Manufacturing | 2015 |
| Maker Dbph Limited | Financial services | 2023 |
| Malcolm Antiques & Jewellery Limited | Manufacturing | 2020 |
| Malcolm, Ogilvie & Company Limited | Professional & scientific | 1894 |
| Mali Therapeutic Massage Ltd | Other services | 2025 |
| Malikdundee Ltd | Hospitality | 2026 |
| Malla Group Limited | Financial services | 2026 |
| Mallards Consulting Limited | Professional & scientific | 2022 |
| Malmed Limited | Hospitality | 2013 |
| Mama Risi Ltd | Hospitality | 2024 |
| Mancher Limited | Construction | 2026 |
| Mander Limited | Financial services | 2022 |
| Manee Limited | Hospitality | 2013 |
| Mangard Ltd | Real estate | 2019 |
| Mango Beans (Scotland) Limited | Hospitality | 2018 |
| Mango Salons Limited | Other services | 2009 |
| Manha Zaman Ltd | Transport & logistics | 2023 |
| Manna House Estates Ltd | Hospitality | 2025 |
| Manson Investments Perth Limited | Real estate | 2019 |
| Manzura Bibi & Bashir Qamar Enterprises Ltd | Wholesale & retail | 2026 |
| Mar-Wil Property Limited | Real estate | 2024 |
| Marbel Construction Ltd | Construction | 2020 |
| Marbel Holdings (Scotland) Ltd | Financial services | 2025 |
| Marblearch Estates Ltd | Real estate | 2017 |
| Marchfield Garage Company, Ltd. (the) | Hospitality | 1947 |
| Marchwell Developments Ltd | Construction | 2010 |
| Mariam Investment Properties Ltd | Real estate | 2023 |
| Mariat Limited | Professional & scientific | 2022 |
| Mariendorf Limited | Health & social care | 2010 |
| Marine Maintenance (Fife) Ltd | Manufacturing | 2020 |
| Marine Support (Tayside) Limited | Transport & logistics | 1998 |
| Marions Corp. LP | | 2015 |
| Marioo Construction Limited | Construction | 2019 |
| Marishka Watt Ltd | Other services | 2025 |
| Maritime Environmental Developments Limited | Construction | 2016 |
| Mark Devereaux Limited | Hospitality | 2015 |
| Mark Stott Plastering Ltd | Construction | 2021 |
| Mark Walker Architect Ltd | Professional & scientific | 2015 |
| Mark Walker Electrical Services Ltd | Construction | 2025 |
| Markberg Resources L.P. | | 2016 |