| Mcteague Consulting Limited | Professional & scientific | 2023 |
| Mctrade Instruments LP | | 2015 |
| Mcvie Electrical Ltd | Construction | 2015 |
| Mcvie Property Ltd | Real estate | 2024 |
| Mcvitie & Price Limited | Professional & scientific | 1911 |
| MCW Property Group Ltd | Real estate | 2023 |
| Mczee Global Services Limited | Wholesale & retail | 2024 |
| MD 2010 GBP Limited Partnership | | 2010 |
| MD 2010 USD Limited Partnership | | 2010 |
| MD Edinburgh Investments Ltd | Real estate | 2018 |
| MD Emtiyaz Hossain Limited | Transport & logistics | 2025 |
| MD Engineering Group Ltd | Professional & scientific | 2025 |
| MD Event Design & Delivery Ltd | Professional & scientific | 2017 |
| MD GAS Ltd | Construction | 2022 |
| MD Hair Academy Ltd | Education | 2025 |
| MD Joinery Ltd | Construction | 2022 |
| MD Management L.P. | | 2021 |
| MD Milne Limited | Hospitality | 2004 |
| MD P&C Holding Ltd | Real estate | 2021 |
| MD Property Lettings Limited | Real estate | 2015 |
| MD2B Ltd | Professional & scientific | 2000 |
| MDA Cross Global LP | | 2017 |
| MDA Studio (Edinburgh) Limited | Professional & scientific | 2025 |
| MDA Studio LLP | | 2021 |
| MDA Universum LP | | 2015 |
| MDB Property Investment Company Limited | Real estate | 2012 |
| MDC Edinburgh Ltd | Health & social care | 2013 |
| MDC1 Limited | Construction | 2025 |
| MDD1 Ltd | Hospitality | 2022 |
| Mdevelop Limited | Information & communication | 2019 |
| Mdhl Property Ltd | Real estate | 2024 |
| MDI Consulting LP | | 2017 |
| MDJ Logistics (Scotland) Ltd. | Other services | 2017 |
| MDL Systems Ltd | Information & communication | 2025 |
| MDM Joiners Ltd | Construction | 2021 |
| MDM Tech Holdings Limited | Administrative & support | 2025 |
| Mdo&G Ltd | Professional & scientific | 2018 |
| MDP Capital Ltd | Professional & scientific | 2020 |
| Mdrake Safety Ltd | Professional & scientific | 2025 |
| MDS Consult LP | | 2015 |
| Mdscommerce Ltd | Wholesale & retail | 2025 |
| Mdvue Limited | Health & social care | 2018 |
| ME Social Limited | Information & communication | 2025 |
| ME Twenty TEN Ltd. | Real estate | 2020 |
| MEA Investments & Trading L.P. | | 2015 |
| Meaalofa 3 L.P. | | 2015 |
| Meadow Bars Ltd | Hospitality | 2025 |
| Meadow Holding & Resources L.P. | | 2009 |
| Meadow Vending Ltd | Wholesale & retail | 2025 |
| Meadowbank Orchard Ltd | Wholesale & retail | 2025 |
| Meadowmill Shed's Ltd | Wholesale & retail | 2021 |
| Meadows Croquet Club | Arts & recreation | 2001 |
| Meadows Foods Ltd | Hospitality | 2023 |
| Meadows Holiday LET Ltd | Real estate | 2018 |
| Meadows Hope Catering Ltd | Hospitality | 2026 |
| Meadows International Shipping Services Ltd | Transport & logistics | 2016 |
| Meadows Linguistic Services Limited | Education | 2015 |
| Meadows Nursery Limited | Health & social care | 2019 |
| Meadows Prosthodontics Limited | Health & social care | 2018 |
| Meadowside Health Ltd | Health & social care | 2025 |
| Meaf Limited | Health & social care | 2026 |
| Meainsinvest & Co. LP | | 2008 |
| Mealia Consulting Ltd | Information & communication | 2013 |
| Mealmile Limited | Real estate | 1994 |
| Meandr Ltd | Manufacturing | 2016 |
| Meaning HQ Ltd | Professional & scientific | 2025 |
| Meaningful AI Limited | Information & communication | 2025 |
| Mearns & Company Limited | Financial services | 2005 |
| Measuretwice Ltd | Information & communication | 2025 |
| Meat & Food Trading LP | | 2014 |
| Meat Meet Limited | Hospitality | 2021 |
| Meaujo (Properties) PLC | Professional & scientific | 1922 |
| Meccariello Consulting Ltd | Financial services | 2017 |
| Mechanic Hive Ltd | Professional & scientific | 2026 |
| Mechanical & Electrical Fixings Limited | Construction | 1987 |
| Mecopp (Minority Ethnic Carers of People Project) | Health & social care | 1999 |
| Mect IT Consulting Ltd | Information & communication | 2023 |
| MED Design Ltd | Professional & scientific | 2025 |
| MED Etech Innovation Ltd | Wholesale & retail | 2018 |
| Med-Ecosse Limited | Wholesale & retail | 1994 |
| Medannex Limited | Professional & scientific | 2009 |
| Medas Strategy Limited | Information & communication | 2023 |
| MEDASSIST247 Ltd | Transport & logistics | 2026 |
| Medberg Universal LP | | 2014 |
| Medcatalyst Innovations Ltd | Extraterritorial | 2025 |
| Medcentras (U.K.) Tech Co. L.P. | | 2009 |
| Medcline Ltd | Health & social care | 2021 |
| Medcom Trade Holdings LP | | 2018 |
| Medcurrent UK Ltd | Information & communication | 2018 |
| Medeira Trading LP | | 2020 |
| Medenta Finance Limited | Administrative & support | 2004 |
| Medford Impacts LP | | 2016 |
| Medford Projects LP | | 2015 |
| Medford Treid LP | | 2015 |
| Media Absolute LP | | 2015 |
| Media Advertising LP | | 2015 |
| Media Agency Foundation | | 1990 |
| Media Avenue Limited | Information & communication | 2005 |
| Media Blaze Management LP | | 2015 |
| Media Bloom Limited | Professional & scientific | 2014 |