| MH Statutory Inspections Ltd | Professional & scientific | 2020 |
| MH Surgical Limited | Health & social care | 2025 |
| MH Telecom Ltd | Construction | 2026 |
| MH Wall (22) Ltd | Health & social care | 2025 |
| Mham Estate Ltd | Real estate | 2023 |
| Mharal Limited | Information & communication | 2009 |
| MHF Management Ltd | Extraterritorial | 2012 |
| Mhiso Limited | Information & communication | 2017 |
| MHJ Three Ltd | Real estate | 2012 |
| MHL Homes Ltd | Construction | 2024 |
| Mhmq Limited | Other services | 2024 |
| MHN PUB Enterprises Limited | Hospitality | 2026 |
| Mhor Outdoor Ltd | Arts & recreation | 2020 |
| Mhor Power Limited | Other services | 2024 |
| Mhpropertyhub Ltd | Real estate | 2024 |
| MHR Realisations Limited | Professional & scientific | 2005 |
| MHS Collie Medical Associates Limited | Health & social care | 2018 |
| MHS Professional Services Ltd | Transport & logistics | 2025 |
| Mhscot Workplace Wellbeing CIC | Administrative & support | 2013 |
| MHV I Carried Interest Partner GP Limited | Other services | 2023 |
| MHV I Carried Interest Partner Limited Partnership | | 2023 |
| MI Locum Service Limited | Health & social care | 2026 |
| MIA Alliance LP | | 2017 |
| MIA II Carry & Co-Investment LP | | 2026 |
| Miak Ltd | Information & communication | 2012 |
| Miakoda LAB Ltd | Information & communication | 2025 |
| Mialgae Ltd | Water & waste | 2016 |
| Mianbros Ltd | Transport & logistics | 2023 |
| MIC (Scotland) Limited | Real estate | 2024 |
| MIC Capital Partners (Brazil Special Opportunities) (Scottish) GP, LLP | | 2019 |
| MIC Capital Partners (Brazil Special Opportunities) 1, LP | | 2019 |
| MIC Capital Partners (Brazil Special Opportunities) 2, LP | | 2019 |
| MIC Capital Partners (Brazil Special Opportunities) 3, LP | | 2019 |
| Micelmax Limited | Real estate | 2018 |
| Michael Atkinson Consultancy Ltd | Professional & scientific | 2026 |
| Michael Carpenter Ltd | Construction | 2021 |
| Michael Gorsky Logistics and Transportation Ltd | Transport & logistics | 2022 |
| Michael Juska Ltd | Real estate | 2018 |
| Michael Kirkham Illustration Ltd | Arts & recreation | 2022 |
| Michael Laird (Holdings) Limited | Professional & scientific | 2009 |
| Michael Laurie Architects Ltd | Professional & scientific | 2015 |
| Michael Miller Family Investment Company 2 | Administrative & support | 2023 |
| Michael Miller Family Investment Company Limited | Administrative & support | 2015 |
| Michael Philip Limited | Construction | 2019 |
| Michael Wood Educational Consultancy Ltd. | Education | 2017 |
| Michael's Story Ltd | Professional & scientific | 2013 |
| Michal Courier Limited | Transport & logistics | 2024 |
| Michal Painters & Decorators Ltd | Construction | 2016 |
| Michelle & Rich Essence Ltd Ltd | Manufacturing | 2026 |
| Michelle Brown PR Ltd | Professional & scientific | 2014 |
| Michelle Strain Consultancy Limited | Health & social care | 2017 |
| Michigan Property (Hamilton) Limited | Real estate | 2011 |
| Michigan/Patron Scotland LP | | 2004 |
| Mick & KO. Ltd | Wholesale & retail | 2026 |
| Micro Empire Media Limited | Professional & scientific | 2012 |
| Micro Renewables (Domestic) Limited | Energy | 2010 |
| Micro Renewables Limited | Energy | 2010 |
| Microbira Limited | Professional & scientific | 2019 |
| Microbrand Marketing Ltd | Professional & scientific | 2024 |
| Microhealth International Ltd | Health & social care | 2023 |
| Microstar Global L.P. | | 2012 |
| Microsys L.P. | | 2012 |
| Microtech Europe L.P. | | 2009 |
| Microtech Industries LP | | 2016 |
| MID Whitestones Solar Ltd | Professional & scientific | 2022 |
| MID Wynd International Investment Trust PLC | Financial services | 1965 |
| Mid-Atlantic Partnership | | 2001 |
| Midas Enterprise Ltd | Real estate | 2020 |
| Midas Touch Investments LP | | 2015 |
| Midcalder Retail Limited | Wholesale & retail | 2025 |
| Middlands Associates L.P. | | 2008 |
| Middlebank Accountancy Limited | Extraterritorial | 2018 |
| Middlebrooks Business Recovery & Advice Limited | Professional & scientific | 2014 |
| Middledrift Medical Limited | Health & social care | 2013 |
| Middledrift Property Limited | Real estate | 2026 |
| Middleham International Partners | | 1994 |
| Middlemiss & Associates Holdings Limited | Other services | 2025 |
| Middlesex Services LP | | 2015 |
| Middleton Orthopaedics Limited | Health & social care | 2022 |
| Midfield Medical Limited | Health & social care | 2025 |
| Midform L.P. | | 2011 |
| Midgard Construction Ltd | Construction | 2019 |
| Midgard North Construction Ltd | Construction | 2026 |
| Midiline Trading LP | | 2015 |
| Midland Company Services LP | | 2017 |
| Midland Corporate Consulting LP | | 2017 |
| Midland Partnership L.P. | | 2010 |
| Midlands Co-Op General Partner Limited | Administrative & support | 2011 |
| Midlands Co-Op Scottish Limited Partnership | | 2011 |
| Midlothian Developments Ltd | Real estate | 2017 |
| Midlothian Energy Limited | Energy | 2020 |
| Midlothian Kickback Media Ltd | Arts & recreation | 2015 |
| Midlothian Schools (Debt Co) Limited | Administrative & support | 2006 |
| Midlothian Schools (Holdings) Limited | Administrative & support | 2006 |
| Midlothian Schools Limited | Administrative & support | 2006 |
| Midlothian Taxis Ltd | Extraterritorial | 2020 |
| Midlothian Utilities Limited | Construction | 2018 |
| Midmar Capital LLP | | 2008 |
| Midmar Consulting Ltd | Professional & scientific | 2021 |
| Midmark 15 Limited | Professional & scientific | 1989 |