| Malikabra Ltd | Wholesale & retail | 2020 |
| Mallard Harbour Limited | Real estate | 2026 |
| Mallon Coffee Co Ltd | Hospitality | 2017 |
| Malts and Spirits Ltd | Wholesale & retail | 2019 |
| Mama's Perth Ltd | Hospitality | 2024 |
| Mangan Ventilation Ltd | Construction | 2019 |
| Mangle Cottage Limited | Hospitality | 2003 |
| Mansfield Estates Pension Trustees Limited | Administrative & support | 2007 |
| Mantebre Company Ltd | Administrative & support | 2023 |
| Mantebre Sparkle Ltd | Administrative & support | 2025 |
| Mantle Data Ltd | Information & communication | 2023 |
| MAP Aircraft Parts Limited | Manufacturing | 2009 |
| MAP Retail Ltd | Wholesale & retail | 2018 |
| MAR Commercial Consulting Ltd | Administrative & support | 2025 |
| Mara Adhbhar Community Interest Company | Health & social care | 2026 |
| Marchmont MFL Limited | Other services | 2016 |
| Mardun Limited | Real estate | 2023 |
| Margaret Morrison (Holdings) Ltd | Extraterritorial | 2024 |
| Mari & Z Ltd | Wholesale & retail | 2026 |
| Marius Covaci Ltd | Administrative & support | 2026 |
| Mark Birkbeck & Sons Limited | Professional & scientific | 2012 |
| Mark Macdonald Joiner & Contractor Limited | Construction | 2013 |
| Marks and Spencer Scottish Limited Partnership | | 2007 |
| Marlefield Farm | | 2001 |
| Maron Solutions Ltd | Information & communication | 2024 |
| Marshall & Co (Scot) Ltd | Construction | 2026 |
| Marshall Company (Scot) Limited | Administrative & support | 2022 |
| Martian Girl Brewing Co Limited | Manufacturing | 2021 |
| Martin E. Payne Limited | Real estate | 1985 |
| Martin Ramsay Painters and Decorators Ltd | Construction | 2025 |
| Marvel Serviced Accomodation Limited | Extraterritorial | 2025 |
| Marwick Brothers Limited | Energy | 2011 |
| Mason James Properties Limited | Real estate | 2025 |
| Master Electrical Ltd | Construction | 2026 |
| Master Stormont Trading Company Limited | Administrative & support | 2015 |
| Match Day Competitions Ltd | Information & communication | 2026 |
| Maya Express Limited | Hospitality | 2025 |
| Maya's Kitchen and Bar Limited | Hospitality | 2023 |
| Maycroft Retreat Limited | Hospitality | 2020 |
| Mazee Group Ltd | Manufacturing | 2023 |
| MB Erecting and Lifting Ltd | Construction | 2026 |
| MBB Developments Ltd. | Construction | 2013 |
| MBB Estate Ltd | Real estate | 2026 |
| MC Properties and Developments Ltd | Real estate | 2025 |
| Mcadam Trading Limited | Professional & scientific | 2017 |
| Mccabe Solutions Ltd | Construction | 2025 |
| Mccash & Hunter LLP | | 2008 |
| Mccormack Decorators - Perth Ltd | Construction | 2026 |
| Mccue Marketing Company Ltd | Professional & scientific | 2021 |
| Mcdermott Group Limited | Construction | 1999 |
| Mcdiarmid Park Limited | Arts & recreation | 1988 |
| Mcgoth Ltd | Arts & recreation | 2019 |
| MCH Holdings Limited | Information & communication | 2016 |
| MCH Sports Limited | Wholesale & retail | 2024 |
| Mchb Perth Ltd | Financial services | 2024 |
| Mchb Wealth Management Limited | Financial services | 1987 |
| Mcintosh & Robertson Limited | Construction | 2015 |
| Mcintosh Autocare Limited | Wholesale & retail | 2016 |
| Mckay Construction Limited | Construction | 2026 |
| Mckay Health & Safety Solutions Ltd | Professional & scientific | 2024 |
| Mckay Smith Ltd | Professional & scientific | 2019 |
| Mckay Smith Renewables Ltd | Construction | 2021 |
| Mckay Training Limited | Education | 2023 |
| Mckean Gardner Limited | Other services | 2015 |
| Mckenzie Burke Homes Ltd. | Other services | 2017 |
| Mckenzie Miller Limited | Public administration | 2012 |
| Mckeown and Smith Property Limited | Real estate | 2024 |
| Mckinlay Contracts Ltd | Construction | 2021 |
| Mclaren Kinvaid Farmers | | 1997 |
| Mclaren Murdoch & Hamilton Limited | Professional & scientific | 1967 |
| Mclaren Worx Ltd | Construction | 2025 |
| Mclaughlan Transport (Perth) Limited | Transport & logistics | 1987 |
| Mclaughlan Trustees Limited | Administrative & support | 2003 |
| Mcleod the Glaziers Perth Limited | Construction | 1983 |
| Mclw Ltd | Information & communication | 2013 |
| Mcmaster Finance Ltd | Professional & scientific | 2025 |
| Mcnicol Plumbing & Heating Services Ltd | Construction | 2023 |
| Mcniven Hire Ltd | Administrative & support | 2018 |
| Mcniven Landscaping Ltd | Administrative & support | 2018 |
| MD (Perth) Limited | Health & social care | 2021 |
| MDG Capital 1 Limited | Construction | 2016 |
| MDG Capital 2 Limited | Other services | 2017 |
| MDG Capital 3 Limited | Wholesale & retail | 2017 |
| MDG Capital Limited | Construction | 2016 |
| MDG Chameleon Ltd. | Wholesale & retail | 2016 |
| MDG Group Business Energy Ltd | Professional & scientific | 1998 |
| MDG Investments Ltd. | Construction | 2016 |
| Mdon Roofing Limited | Construction | 2021 |
| MDS Removals Ltd | Transport & logistics | 2023 |
| MDT Co. Ltd | Arts & recreation | 2020 |
| ME Photonics Limited | Professional & scientific | 2025 |
| Media Mentoring Ltd | Information & communication | 2020 |
| Megalops Limited | Administrative & support | 2010 |
| Meldrum Construction (Perth) Ltd. | Construction | 2004 |
| Melvich Wind Farm Limited | Energy | 1992 |
| Mena Club Limited | Wholesale & retail | 2023 |
| Mendell Helium PLC | Mining & quarrying | 2020 |
| Merlin Energy Ltd | Professional & scientific | 2020 |
| Merlin ERD Limited | Mining & quarrying | 2007 |
| Messrs Stanley J Johnston Limited | Agriculture & fishing | 2016 |