| Market Cleaning Services Limited | Water & waste | 2018 |
| Market Group Ltd | Hospitality | 2025 |
| Market Tech Solutions Ltd | Other services | 2013 |
| Marketgait Developments Limited | Real estate | 2001 |
| Marketgait Properties Limited | Hospitality | 2020 |
| Marketing Afterdark Ltd | Professional & scientific | 2020 |
| Markmatpro Limited | Wholesale & retail | 2024 |
| Marley Rentals Limited | Real estate | 2025 |
| Maroco Limited | Real estate | 2012 |
| Marr Twentyone Limited | Real estate | 2021 |
| Mars Taxis Limited | Transport & logistics | 2017 |
| Marscot Limited | Wholesale & retail | 1993 |
| Martial Art INK Ltd | Arts & recreation | 2024 |
| Martin Alan Construction Limited | Construction | 2002 |
| Martin Alan Group Limited | Financial services | 2026 |
| Martin Alan Properties Ltd | Construction | 2011 |
| Martin Taylor (Music) Limited | Arts & recreation | 1993 |
| Marueden Ltd | Households | 2018 |
| Marvelesque CIC | Education | 2018 |
| Marvend Limited | Real estate | 1996 |
| Marvo the Wonder Chicken 1 Limited | Information & communication | 2008 |
| Mary Morrison (Northern) Limited | Extraterritorial | 1979 |
| Mary S Cotter Ltd | Transport & logistics | 2024 |
| Maryland Lettings Limited | Real estate | 2022 |
| MAS Productions Limited | Education | 2012 |
| Masalagroove Ltd | Hospitality | 2026 |
| Mashed Neep Limited | Wholesale & retail | 2021 |
| Maso Group Ltd | Manufacturing | 2017 |
| Mason Assets Dundee Ltd | Construction | 2025 |
| Mass Dynamic Limited | Wholesale & retail | 2014 |
| Massie Autos Ltd | Wholesale & retail | 2023 |
| Massive Dynamic Technical Services Ltd | Professional & scientific | 2022 |
| Masterpower Electronics Limited | Administrative & support | 2019 |
| Masters Swim Coach Ltd | Education | 2024 |
| Masterton Property Ltd | Transport & logistics | 2025 |
| Matchless Properties Limited | Real estate | 2019 |
| Material UK (Scotland) Ltd | Professional & scientific | 2012 |
| Matrix Ceiling Distribution Limited | Construction | 2004 |
| Matrix Enterprise Consulting Limited | Information & communication | 2004 |
| Matrix International Sourcing Limited | Administrative & support | 2000 |
| Matrix Property Holdings Limited | Financial services | 2025 |
| Matrixa Credit L.P. | | 2015 |
| Matthew Michie Plumbing and Heating Limited | Construction | 2022 |
| Matthew Property Collective Ltd | Real estate | 2024 |
| Matthew Timmons & Co. Limited | | 1958 |
| MAX Design Agents Limited | Wholesale & retail | 2023 |
| Maxbon Limited | Hospitality | 2016 |
| Maxform Transport L.P. | | 2015 |
| Maxim Consult Limited | Professional & scientific | 2023 |
| Maximo Distribution Ltd | Wholesale & retail | 2024 |
| Maxiplan L.P. | | 2015 |
| Maxlight Manufacturing Ltd | Manufacturing | 2021 |
| Maxwelltown Information Centre | Other services | 2002 |
| MAY Isle Seafood Limited | Administrative & support | 2017 |
| Mayans Logistics LP | | 2017 |
| Maybury Contracts Ltd | Manufacturing | 2023 |
| Maycap Investments Limited | Real estate | 2016 |
| Mayfield Energy Ltd | Professional & scientific | 2026 |
| Mazaydar Dundee Ltd | Hospitality | 2018 |
| Mazocore Ltd | Real estate | 2013 |
| MB Broadcasting & Media Ltd | Information & communication | 2012 |
| MB Dundee Catering Ltd | Hospitality | 2026 |
| MB Fish Merchants Ltd | Wholesale & retail | 2017 |
| MB Services (Arbroath) Ltd | Professional & scientific | 2012 |
| MBB Scaffolding Limited | Construction | 2018 |
| Mbbr Ltd | Real estate | 2023 |
| MBC Angus Limited | Construction | 2021 |
| MBE Valeting Services Limited | Wholesale & retail | 2023 |
| MBM Fitness Ltd | Arts & recreation | 2025 |
| MBRS23 Limited | Hospitality | 2016 |
| MBS Autotech Ltd | Wholesale & retail | 2025 |
| MBS Property & Building Services Ltd | Construction | 2025 |
| MC JOINERY.EST19 Ltd | Construction | 2026 |
| MC Maritime Ltd | Transport & logistics | 2023 |
| MC Wishaw Limited | Hospitality | 2018 |
| MC2 (Scotland) Limited | Construction | 2008 |
| MCB Roofing Limited | Construction | 2020 |
| Mcbookie Ltd | Arts & recreation | 2008 |
| Mcburney Clelland & Boyd Limited | Health & social care | 1990 |
| MCC & K Services Ltd | Manufacturing | 2013 |
| Mccabe and Robertson Ltd. | Construction | 1997 |
| Mccallum & Sons T/A Alba Roofing Ltd | Construction | 2025 |
| Mccallum and Cameron Creative Ltd | Other services | 2024 |
| Mccallum Pressure Drilling Ltd | Professional & scientific | 2026 |
| Mccallum's Autobreakers Limited | Water & waste | 2019 |
| Mccash Property Haus Limited | Real estate | 2026 |
| Mcclelland Business Services Limited | Other services | 2020 |
| Mccluskey Electrics Ltd | Construction | 2025 |
| Mcdade Joinery Ltd | Construction | 2026 |
| MCDERMOTT12 Ltd | Transport & logistics | 2026 |
| Mcdermotts Foods Ltd | Manufacturing | 2019 |
| Mcdonald Builders Ltd. | Other services | 2017 |
| Mcdonald Joiners Limited | Construction | 2013 |
| Mcdonche Limited | Information & communication | 2018 |
| Mcdowell Coatings GRP Limited | Manufacturing | 2016 |
| MCE Engineering (Scotland) Ltd | Manufacturing | 1998 |
| MCE Fabrications (Scotland) Limited | Manufacturing | 2023 |
| MCG2 Limited | Hospitality | 2019 |
| Mcgarry Fashion Ltd | Information & communication | 2014 |
| Mcgonagalls Limited | Hospitality | 2023 |