| Mercy Impex LP | | 2017 |
| Merit Tartan Limited | Financial services | 2019 |
| Merqure Energy Ltd | Professional & scientific | 2023 |
| Merry Berry Property Limited | Real estate | 2021 |
| Mertal Investments Limited | Real estate | 2018 |
| MES Power Engineering Ltd | Construction | 2014 |
| Messrs John R S Grant Limited | Agriculture & fishing | 2003 |
| Messy Nessy Playcentre Ltd | Hospitality | 2018 |
| Mestone Cleaning Services Ltd | Administrative & support | 2025 |
| Mestone Motors Ltd | Wholesale & retail | 2026 |
| Metaal Design Limited | Administrative & support | 2007 |
| Metacord Experts L.P. | | 2015 |
| Metal Guard Distribution Ltd | Wholesale & retail | 2026 |
| Metalexpert L.P. | | 2013 |
| Metalfront L.P. | | 2016 |
| Metalinvest L.P. | | 2015 |
| Metaltech UK Limited | Manufacturing | 2007 |
| Metaltech UK Profiles Ltd | Manufacturing | 2018 |
| Metlux Sales L.P. | | 2014 |
| Metro Motors Bros. Ltd | Wholesale & retail | 2011 |
| MEX 2 U Limited | Hospitality | 2022 |
| MF Martial Arts Dundee LLP | | 2024 |
| MF Property Enterprises Limited | Real estate | 2022 |
| MF Retail Ltd | Wholesale & retail | 2025 |
| MFW-58 Ltd | Information & communication | 2025 |
| MG Fit-Out Ltd | Construction | 2022 |
| MGM Aersat Limited | Other services | 2017 |
| MGQ Properties Ltd | Real estate | 2019 |
| MGS Deliveries Ltd | Transport & logistics | 2025 |
| MGT Training Ltd. | Education | 2004 |
| MH Electrical (Scotland) Limited | Construction | 2012 |
| MH Fish & Chips Limited | Hospitality | 2019 |
| MHR Leisure Limited | Arts & recreation | 2012 |
| MHS (Dundee) Ltd | Households | 2018 |
| MHS Blinds Limited | Manufacturing | 2024 |
| MI Smart Ride Ltd | Transport & logistics | 2019 |
| Mi:Rna Ltd | Professional & scientific | 2019 |
| Miay Limited | Health & social care | 2020 |
| Miberry Ltd | Wholesale & retail | 2020 |
| Michael a Brown Solicitors Limited | Professional & scientific | 2017 |
| Michael Keillor Limited | Information & communication | 2017 |
| Michael Rees Ltd | Construction | 2024 |
| Michmosh Makeup Ltd. | Wholesale & retail | 2019 |
| Microbend Limited | Manufacturing | 2025 |
| Microgreens Ltd | Agriculture & fishing | 2025 |
| MID Global Ltd | Extraterritorial | 2013 |
| Mid-Lin Day Care Limited | Health & social care | 2003 |
| Midaco Ltd | Information & communication | 2013 |
| Midas & Partner LP | | 2017 |
| Midas Corp. LP | | 2015 |
| Middlebank Limited | Real estate | 2003 |
| Middleton Memorials Limited | Other services | 2009 |
| Midfront Sales L.P. | | 2013 |
| Midholm Development L.P. | | 2015 |
| Midlex Communications L.P. | | 2015 |
| Mike Mckenna UX Ltd | Information & communication | 2019 |
| Milebrook Enterprises L.P. | | 2015 |
| Mill Lake Investments Ltd | Real estate | 2023 |
| Mill O Mains Store Ltd | Wholesale & retail | 2022 |
| Millar Family Funeral Directors Ltd | Other services | 2017 |
| Millard Consulting Limited | Professional & scientific | 2021 |
| Millares Property Solution Ltd | Real estate | 2025 |
| Millars Menswear Ltd | Wholesale & retail | 2018 |
| Millbraid Limited | Professional & scientific | 1997 |
| Millburn Electrical Solutions Ltd | Construction | 2018 |
| Miller of Crail Limited | Manufacturing | 1988 |
| Miller-Wighton Homes Ltd | Real estate | 2019 |
| Millgate Properties Limited | Real estate | 2014 |
| Milne & Borwick Electrical Ltd | Construction | 2024 |
| Milne Towbars and Trailers Ltd | Wholesale & retail | 2025 |
| Milne Wealth Management Limited | Financial services | 2012 |
| Milngavie Holdings Ltd | Construction | 2018 |
| Milonex Ltd | Professional & scientific | 2014 |
| Milton Developments (Angus) Ltd | Construction | 2025 |
| Milton Developments (Monifieth) Ltd | Construction | 2023 |
| Mimir Training Solutions Limited | Professional & scientific | 2023 |
| Minahil Glasgow Limited | Hospitality | 2019 |
| Mind Room Consultants Limited | Transport & logistics | 2018 |
| Minding Kids Limited | Education | 2021 |
| Mine & Quarry Consultancy Ltd | Mining & quarrying | 2026 |
| Minhaa Ltd | Wholesale & retail | 2025 |
| Mini-Mix Childrenswear Boutique Ltd. | Wholesale & retail | 2018 |
| Minick of Cupar Limited | Wholesale & retail | 2015 |
| Minick of Ladybank Limited | Wholesale & retail | 2014 |
| Minick of Newport Limited | Wholesale & retail | 2014 |
| Minick of ST. Andrews (Artisan Butchers) Limited | Wholesale & retail | 2010 |
| Minor Lime Limited | Real estate | 2015 |
| Mint Accessories (Scotland) Limited | Wholesale & retail | 2018 |
| Mint Accounting Ltd | Professional & scientific | 2011 |
| Mint HQ Limited | Professional & scientific | 2016 |
| Mint Leaf Investments Limited | Health & social care | 2023 |
| Mint Project Control Limited | Professional & scientific | 2016 |
| Mint Tick Tax Ltd | Professional & scientific | 2011 |
| MIR Dundee Ltd | Health & social care | 2016 |
| Mira Express Services Limited | Public administration | 2022 |
| Mirano Partners Ltd | Professional & scientific | 2013 |
| Mirex Auto Precision Ltd | Wholesale & retail | 2025 |
| Mirissa Engineering Services Ltd | Professional & scientific | 2018 |
| Mirror Mirror (Scotland) Ltd | Other services | 2015 |
| Mirror Mirror Beauty (Scotland) Ltd | Other services | 2017 |