| Mayfield Suites (Edinburgh) Ltd | Hospitality | 2024 |
| Mayfield Supreme LP | | 2016 |
| Mayfield Technology Ltd | Information & communication | 2026 |
| Mayfin Design Limited | Information & communication | 2008 |
| MAYFLOWER8A Ltd | Hospitality | 2023 |
| Mayforth Asset and Development Management Limited | Professional & scientific | 2014 |
| Mayhew International Ltd | Information & communication | 2004 |
| Mayinscotland Ltd | Administrative & support | 2024 |
| Mayline Corporation LP | | 2014 |
| Mayne Ecosse Ltd | Professional & scientific | 2021 |
| Mayo Books Limited | Wholesale & retail | 2025 |
| Mayo Corporation L.P. | | 2012 |
| Mayor's Bite Bakery (UK) Ltd | Manufacturing | 2025 |
| Mayqo Ltd | Information & communication | 2024 |
| Mayrain Company LP | | 2020 |
| Mayrock Nordic L.P. | | 2015 |
| Mayside Partners Limited | Financial services | 2019 |
| Mayside Solutions LP | | 2016 |
| Mazaza Games Ltd | Administrative & support | 2023 |
| Maze Interactive Health Ltd | Health & social care | 2024 |
| Maze Reality Ltd | Professional & scientific | 2020 |
| Mazen Meat's Ltd | Wholesale & retail | 2025 |
| Mazhar ALI Global Ltd | Wholesale & retail | 2025 |
| Mazma Ltd | Real estate | 2021 |
| Mazzoli Management Services Ltd | Hospitality | 2020 |
| Mazzone & Co. LP | | 2013 |
| MB & MB Builders Ltd | Manufacturing | 2022 |
| MB & MB Limited | Professional & scientific | 2016 |
| MB Cabs Ltd | Transport & logistics | 2023 |
| MB Contracts Scotland Ltd | Construction | 2021 |
| MB Corporate International LP | | 2019 |
| MB Edinburgh Investments Limited | Real estate | 2015 |
| MB Horizon LP | | 2024 |
| MB Joinery and Construction Ltd | Manufacturing | 2021 |
| MB Nexus Limited | Construction | 2015 |
| MB Orthopaedics Limited | Health & social care | 2012 |
| MB Productions Ltd | Information & communication | 2011 |
| MB Rail Consultancy Limited | Professional & scientific | 2015 |
| MB Service Holding LP | | 2021 |
| MB Solve LLP | | 2013 |
| Mb&Mm Ltd | Transport & logistics | 2025 |
| MB1062 Ltd | Professional & scientific | 2016 |
| MB23 Consultancy Ltd | Professional & scientific | 2023 |
| MB360 Limited | Other services | 2017 |
| MB5 Limited | Professional & scientific | 2015 |
| MB6 Limited | Real estate | 2017 |
| Mbarc Solutions Limited | Information & communication | 2026 |
| MBC Lettings Edinburgh Ltd | Real estate | 2024 |
| MBC Property Edinburgh Ltd | Real estate | 2018 |
| MBD Business Consulting LP | | 2016 |
| Mbds Ltd | Health & social care | 2025 |
| MBH Carry LP | | 2019 |
| MBH Kindred Care Edinburgh Ltd | Health & social care | 2025 |
| Mbhl Limited | Professional & scientific | 2019 |
| MBI 1 Ltd | Other services | 2020 |
| MBK Joiners Ltd | Construction | 2023 |
| Mbla Accounting Firm Limited | Professional & scientific | 2025 |
| MBM & Co Edinburgh Ltd | Professional & scientific | 2020 |
| MBM Board Nominees Limited | Professional & scientific | 1995 |
| MBM Commercial LLP | | 2005 |
| MBM Escrow Services Limited | Professional & scientific | 2003 |
| MBM Limited Liability Partnership | | 2005 |
| MBM Nominees Limited | Professional & scientific | 2005 |
| MBM Property Nominees Limited | Administrative & support | 1991 |
| MBM Secretarial Services Limited | Professional & scientific | 1995 |
| MBM Shelfco (57) Limited | Wholesale & retail | 2009 |
| MBM Trustee Company Limited | Professional & scientific | 2003 |
| MBM Web LP | | 2024 |
| Mbmc International LP | | 2020 |
| Mbmfon Ltd | Information & communication | 2022 |
| Mbna Scotland LP | | 2009 |
| Mbnautic Ltd | Wholesale & retail | 2026 |
| MBP Aitchison Ltd | Real estate | 2017 |
| MBP Bailie Ltd | Real estate | 2017 |
| MBP Blair Ltd | Real estate | 2017 |
| MBP Drummond Ltd | Real estate | 2017 |
| Mbpsykes Ltd | Arts & recreation | 2025 |
| Mbrothers Holding LP | | 2016 |
| MBS Solicitors Limited | Professional & scientific | 2024 |
| MBS Therapy’S Ltd | Health & social care | 2022 |
| MBS Ventures Limited | Real estate | 2015 |
| Mbsh Holding Ltd | Financial services | 2024 |
| MC Alpine International L.P. | | 2009 |
| MC Assets & Properties Ltd | Households | 2026 |
| MC Auto Transport Ltd | Transport & logistics | 2025 |
| MC Cagna Limited | Hospitality | 2014 |
| MC Digital Consulting LP | | 2024 |
| MC Driving Ltd | Education | 2023 |
| MC Smart Investment LP | | 2017 |
| Mc&Dp Leisure Ltd | Arts & recreation | 2018 |
| Mcadam Ventures Ltd | Wholesale & retail | 2021 |
| Mcaga Group Ltd | Financial services | 2025 |
| Mcakays Logistics Limited | Transport & logistics | 2023 |
| Mcal Sweet Retail Limited | Wholesale & retail | 1999 |
| Mcallister Properties Ltd | Real estate | 2019 |
| Mcalpin Properties Limited | Hospitality | 2022 |
| Mcapple Limited | Real estate | 2015 |
| Mcara Horne & Fraser Ltd | Professional & scientific | 2017 |
| Mcardle Scottish Limited Partnership | | 2006 |
| Mcarthur Properties Limited | Real estate | 2026 |