| Mcgooz Pubs Limited | Hospitality | 2026 |
| Mcgowden Properties Ltd | Real estate | 2024 |
| Mcgregor Balfour (Sales) Limited | Wholesale & retail | 1981 |
| Mcgregor Welding Services Limited | Manufacturing | 2016 |
| MCH Oilfield Services Ltd | Professional & scientific | 2018 |
| Mchugh Electrical Ltd | Manufacturing | 2015 |
| Mcilravey Electrical (Dundee) Ltd | Construction | 2012 |
| Mcinrue HQ North Ltd | Real estate | 2023 |
| Mcintosh Asset Management Limited | Agriculture & fishing | 1984 |
| Mcintosh Medical Limited | Administrative & support | 2023 |
| Mcintosh Property Letting Limited | Real estate | 2020 |
| Mcintosh Shepherd Limited | Hospitality | 2020 |
| Mcintyre Media Limited | Professional & scientific | 2023 |
| Mcintyres Salons Ltd | Real estate | 2023 |
| Mciver Group Limited | Arts & recreation | 2021 |
| Mcivers Motor Mechanics Limited | Wholesale & retail | 2017 |
| Mcjoinery Scot Ltd | Construction | 2026 |
| MCK Roofing & Construction Ltd | Construction | 2024 |
| Mckay & Innes Limited | Other services | 2014 |
| Mckean Ltd | Construction | 2024 |
| Mckennas Law Practice Ltd | Professional & scientific | 2009 |
| Mckenzie and Archibald Limited | Manufacturing | 2026 |
| Mckeown Property Development Ltd | Real estate | 2025 |
| Mckerracher Towers Limited | Real estate | 2018 |
| Mckinlay Rope Access Ltd | Construction | 2018 |
| Mckinley Consulting Ltd. | Information & communication | 2002 |
| Mclaren Flooring Ltd | Wholesale & retail | 2025 |
| Mclaren Henderson (ST Andrews) Limited | Real estate | 1949 |
| Mclean Engineering Services Ltd | Professional & scientific | 2024 |
| Mclean Roofing Limited | Construction | 2015 |
| Mcleans Electrical Ltd | Mining & quarrying | 2018 |
| Mcleans Seafoods Limited | Wholesale & retail | 2019 |
| Mcleish Properties Limited | Real estate | 2002 |
| Mcleod Building Services Ltd | Construction | 2021 |
| Mcleod Consultancy Limited | Information & communication | 2017 |
| Mcleod Rope Access Solutions Limited | Other services | 2024 |
| Mcleod Transport Ltd | Transport & logistics | 2025 |
| MCM Access Solutions Ltd | Construction | 2025 |
| Mcmaihin Ceramics Limited | Construction | 2014 |
| Mcmanus Knight Developments Ltd | Real estate | 2023 |
| Mcmillan Leisure(Scotland) Ltd | Hospitality | 2018 |
| Mcmillan Rome Ltd | Professional & scientific | 2013 |
| Mcminn Marine Limited | Professional & scientific | 2007 |
| Mcnally Electrical (Dundee) Limited | Construction | 2023 |
| Mcnally Recruitment Ltd | Administrative & support | 2019 |
| Mcnally Scaffolding Ltd | Construction | 2026 |
| Mcnicoll and Cairnie Limited | Wholesale & retail | 2017 |
| MCO Defence Solicitors Ltd | Professional & scientific | 2018 |
| Mcphails Ltd | Hospitality | 2018 |
| Mcphee Electrical Ltd | Construction | 2024 |
| Mcpherson Pharmacy Limited | Wholesale & retail | 1998 |
| Mcqueen Transport Solutions Ltd | Transport & logistics | 2026 |
| Mcquillan Cosmetics Ltd | Health & social care | 2013 |
| Mcwest Properties Limited | Real estate | 2022 |
| MD Mortgage Solutions Limited | Financial services | 2015 |
| MD2 Property Ltd | Real estate | 2023 |
| Mdlc Property Services Ltd | Financial services | 2025 |
| MDS Dundee Limited | Construction | 2006 |
| ME OFF Ltd | Other services | 2011 |
| Meaa Group Limited | Information & communication | 2015 |
| Meaa Group Logistics Ltd | Transport & logistics | 2020 |
| Meadowplace Investments Limited | Real estate | 2001 |
| Meadowside Bars Limited | Hospitality | 2025 |
| Meadowside Nominees Limited | Professional & scientific | 2007 |
| Meadowside Trustees Limited | Professional & scientific | 2013 |
| Mearns Matco Ltd | Professional & scientific | 2024 |
| Medalion Ltd | Health & social care | 2020 |
| Meded Engage Ltd | Professional & scientific | 2020 |
| Media Muse Limited | Information & communication | 2025 |
| Mediavoodoo Limited | Information & communication | 2014 |
| Medical + Dental Financial Planning Services Ltd | Administrative & support | 2006 |
| Medical Ascend Limited | Information & communication | 2024 |
| Medics Solutions Limited | Health & social care | 2019 |
| Mediprescribe Ltd | Health & social care | 2024 |
| Medpsychkh Ltd | Health & social care | 2024 |
| Medusa Property Ltd | Real estate | 2023 |
| Meera Samdani Limited | Wholesale & retail | 2023 |
| Megan’S Sports Bar & Club Ltd | Hospitality | 2025 |
| Meikle Builders Coalburn Ltd | Construction | 2011 |
| Mekon Artz Ltd. | Administrative & support | 2007 |
| Mel's Munch Ltd | Hospitality | 2023 |
| Melete Well-Being Services Ltd | Other services | 2024 |
| Melliot Alliance LP | | 2017 |
| Meltdown Design Ltd | Arts & recreation | 2023 |
| Meltur Trading Limited | Wholesale & retail | 2012 |
| Melville-Knox Christian School Fife Ltd | Education | 2022 |
| Memishi Properties Limited | Real estate | 2025 |
| MEN in Black Building Services Ltd | Construction | 2020 |
| Mental Health Matters MH Ltd | Health & social care | 2024 |
| Mentalist Project LP | | 2016 |
| Menzies & Sons Limited | Real estate | 1926 |
| Menzies Properties Ltd | Real estate | 2025 |
| MEP Technologies Ltd | Manufacturing | 2015 |
| Merabray Ventures Ltd | Real estate | 2025 |
| Meraki Halo Contracts Ltd | Construction | 2021 |
| Meraki Halo Holdings Ltd | Real estate | 2025 |
| Meraki Halo Ltd | Real estate | 2020 |
| Mercury Chauffeur Hire Ltd | Transport & logistics | 2025 |
| Mercury Oilfield Consultancy Ltd | Professional & scientific | 2012 |
| Mercy & Joy Specialist Dentistry Services Limited | Health & social care | 2024 |