| Maxbridge Logistics L.P. | | 2016 |
| Maxcom Intertrade LP | | 2016 |
| Maxcom Management LP | | 2017 |
| Maxcom Trading Group LP | | 2020 |
| Maxdell Trading LP | | 2016 |
| Maxful Group Ltd | Information & communication | 2025 |
| Maxi Triumph LP | | 2016 |
| Maxi's Cafe Ltd | Hospitality | 2009 |
| Maxim Technology L.P. | | 2012 |
| Maxim's Beauty Bar Ltd | Other services | 2024 |
| Maxima Capital LP | | 2018 |
| Maximelia Ltd | Real estate | 2025 |
| Maximillion Employee Ownership Trustee Limited | Financial services | 2025 |
| Maximillion Events Limited | Administrative & support | 1988 |
| Maximize Building & Renovations Ltd | Construction | 2022 |
| Maximum Availability Limited | Information & communication | 2006 |
| Maximum Effort Aircraft Maintenance Ltd | Manufacturing | 2024 |
| Maximus & Co Ltd | Construction | 2012 |
| Maximus Corporation L.P. | | 2009 |
| Maximuselonglobal Ltd | Wholesale & retail | 2025 |
| Maxitec International LP | | 2016 |
| Maxiton Assets LP | | 2016 |
| Maxiton LP | | 2015 |
| Maxlink Trading LP | | 2015 |
| Maxnet L.P. | | 2012 |
| Maxsim Ltd. | Professional & scientific | 2015 |
| Maxteam Trading LP | | 2014 |
| Maxtech Electronics LP | | 2017 |
| Maxton Capital LP | | 2014 |
| Maxtra LP | | 2018 |
| Maxtromax Consultancy Ltd | Information & communication | 2024 |
| Maxward Alliance Limited | Administrative & support | 2019 |
| Maxweldpros Ltd | Manufacturing | 2025 |
| Maxwell Church | Other services | 2024 |
| Maxwell Global L.P. | | 2011 |
| Maxwell Green Design Limited | Professional & scientific | 2004 |
| Maxwell Import/Export L.P. | | 2015 |
| Maxwell Joinery (Edin) Ltd | Construction | 2024 |
| Maxwell Management and Supply LP | | 2017 |
| Maxwell Organisation L.P. | | 2011 |
| Maxwell Power LP | | 2017 |
| Maxwell Services LP | | 2014 |
| Maxwell Trading Group L.P. | | 2009 |
| Maxx Energy Limited | Energy | 2025 |
| Maxxam International Ltd | Wholesale & retail | 2025 |
| Maxximise Limited | Information & communication | 2023 |
| Maxxway Systems LP | | 2023 |
| MAY Accountancy Ltd | Professional & scientific | 2024 |
| MAY Galvez Trader Ltd | Wholesale & retail | 2026 |
| MAY Management Consultancy Ltd | Wholesale & retail | 2021 |
| MAY Street Holdings Ltd | Financial services | 2012 |
| Maya Alliance LP | | 2016 |
| Maya Commerce LP | | 2017 |
| Maya Irwin Transformational Change Limited | Administrative & support | 2022 |
| Mayapan International Limited Partnership | | 2000 |
| Mayasummer Ltd | Wholesale & retail | 2025 |
| Maybird Trading & Co | | 1993 |
| Maybole Takeaway Ltd | Hospitality | 2013 |
| Maybrook Projects L.P. | | 2015 |
| Mayburn House Ltd | Administrative & support | 2019 |
| Mayburn International Limited | Professional & scientific | 2009 |
| Maybury Car Sales Ltd | Wholesale & retail | 2021 |
| Maybury Companies IP Limited | Financial services | 2025 |
| Maybury Construction Limited | Construction | 2025 |
| Maybury Craigs Property Limited | Households | 2024 |
| Maybury Driveways Limited | Construction | 2025 |
| Maybury Group Limited | Construction | 2020 |
| Maybury Landscaping Limited | Construction | 2025 |
| Maybury Scotland Limited | Other services | 2024 |
| Mayday Spirits Trading LP | | 2017 |
| Maydes International LP | | 2013 |
| Mayfair Capital TGF (Scots) LP | | 2017 |
| Mayfair Equity Partners I Co-Investor a LP | | 2016 |
| Mayfair Equity Partners I Co-Investor General Partner LLP | | 2015 |
| Mayfair Equity Partners I Co-Investor GP Limited | Financial services | 2015 |
| Mayfair Equity Partners I Co-Investor LP | | 2015 |
| Mayfair Equity Partners I F&F LP | | 2015 |
| Mayfair Equity Partners I General Partner Limited | Financial services | 2015 |
| Mayfair Equity Partners I GP LLP | | 2015 |
| Mayfair Equity Partners I LP | | 2015 |
| Mayfair Equity Partners I Sidecar LP | | 2015 |
| Mayfair Equity Partners I YS (II) LP | | 2017 |
| Mayfair Equity Partners I YS LP | | 2016 |
| Mayfair Equity Partners II Co-Investor a LP | | 2018 |
| Mayfair Equity Partners II Co-Investor General Partner LLP | | 2018 |
| Mayfair Equity Partners II Co-Investor GP Limited | Administrative & support | 2018 |
| Mayfair Equity Partners II F&F LP | | 2018 |
| Mayfair Equity Partners II General Partner Limited | Administrative & support | 2018 |
| Mayfair Equity Partners II GP LLP | | 2018 |
| Mayfair Equity Partners II LP | | 2018 |
| Mayfair Equity Partners II Sidecar LP | | 2018 |
| Mayfair Equity Partners III F&F LP | | 2023 |
| Mayfair Equity Partners III GP LLP | | 2022 |
| Mayfair Luxury Properties Ltd | Real estate | 2018 |
| Mayfair Project Services Ltd | Real estate | 2026 |
| Mayfield Anaesthesia Services Ltd | Health & social care | 2017 |
| Mayfield Edinburgh Guest House Limited | Hospitality | 2018 |
| Mayfield FRY Limited | Hospitality | 2021 |
| Mayfield Property Services Ltd | Real estate | 2020 |
| Mayfield Renovations & Maintenance Limited | Construction | 2025 |