| Mortgage Solutions Plus Ltd | Financial services | 2025 |
| Mortgage Spot Ltd | Financial services | 2020 |
| Mortgage Time Limited | Financial services | 2018 |
| Mortice Enterprises Limited | Hospitality | 2026 |
| Mortimer Influence LP | | 2015 |
| Mortimer Resources LP | | 2015 |
| Mortlock Ltd | Information & communication | 2025 |
| Morton Fraser Directors Limited | Professional & scientific | 1995 |
| Morton Fraser Macroberts LLP | | 2004 |
| Morton Fraser Macroberts Trustees 1 Limited | Professional & scientific | 2004 |
| Morton Fraser Macroberts Trustees 2 Limited | Professional & scientific | 2011 |
| Morton Fraser Macroberts Trustees 3 Limited | Professional & scientific | 2006 |
| Morton Fraser Macroberts Trustees 4 Limited | Professional & scientific | 2005 |
| Morton Fraser Macroberts Trustees Limited | Professional & scientific | 1973 |
| Morton Fraser Nominees (NO 2) Limited | Professional & scientific | 1996 |
| Morton Fraser Nominees Limited | Professional & scientific | 1996 |
| Morton Hart Ltd | Construction | 2015 |
| Morton Mixers & Blenders Ltd | Manufacturing | 2008 |
| Morton Mixers Limited | Manufacturing | 2016 |
| Morton Sales LP | | 2013 |
| Morton Trading LP | | 2010 |
| Morty LP | | 2012 |
| Morva Management & Lettings Ltd | Real estate | 2025 |
| Mosaic Intelligence Consulting Ltd | Professional & scientific | 2024 |
| Mosaic NS LP | | 2015 |
| Mosaic Property Special Partner 2 LP | | 2008 |
| Moscar Capital (S) LP | | 2019 |
| Moscopole Ltd | Extraterritorial | 2025 |
| Moscow Trade LP | | 2014 |
| Moses Mclaren Limited | Real estate | 2000 |
| Mosfer Bros Ltd | Hospitality | 2023 |
| Mosko Edinburgh Limited | Health & social care | 2015 |
| Moson Ltd | Manufacturing | 2026 |
| Mosque Kitchen Limited | Hospitality | 2009 |
| Mossatex Import LP | | 2014 |
| Mossblown Properties (Scotland) Limited | Hospitality | 2020 |
| Mosset Consulting Ltd | Professional & scientific | 2017 |
| Mossland Investments L.P. | | 2010 |
| Mosspark Enterprises Ltd | Wholesale & retail | 2026 |
| Mosspark Management Ltd | Real estate | 2025 |
| Mossvale Care Home Limited | Health & social care | 2007 |
| Mossytop Dreamharvest Ltd | Information & communication | 2016 |
| Most Alliance LP | | 2015 |
| Most Energy Technologies LP | | 2011 |
| Most Entertaining Ltd | Education | 2011 |
| Most Trade LP | | 2015 |
| Mostaco Corp LP | | 2015 |
| Mostal & Co | | 1993 |
| Mostbet LP | | 2019 |
| Mostly Media (North) Limited | Professional & scientific | 2018 |
| Moston Care Foundation | Health & social care | 2013 |
| Mosytop Publishing LP | | 2019 |
| Mota UK Holdings Limited | Real estate | 2025 |
| MOTE102 Limited | Wholesale & retail | 2023 |
| Motel One (Scotland) Limited | Hospitality | 2011 |
| Mothcatcher Ltd | Information & communication | 2020 |
| Mother Bahia Ltd | Manufacturing | 2026 |
| Mother Trucker Trailer Company Ltd | Wholesale & retail | 2026 |
| Mothercat Limited | Extraterritorial | 1995 |
| Mothership (Scotland) Limited | Hospitality | 2005 |
| Motherwell Trade LP | | 2017 |
| Motif Training & Development Ltd | Wholesale & retail | 2019 |
| Motif UK (PTY) Ltd | Information & communication | 2022 |
| Motion Development LP | | 2013 |
| Motion Fund II (GP) LP | | 2005 |
| Motional Stability L.P. | | 2012 |
| Motioncraft Limited | Information & communication | 2015 |
| Motivado LP | | 2002 |
| Motivational Solutions Ltd | Administrative & support | 2017 |
| Moto Stable Ltd | Real estate | 2016 |
| Motoalliance Limited | Wholesale & retail | 2024 |
| Motojoe Limited | Wholesale & retail | 2013 |
| Motor Sport Plus 1 Scotland Limited | Wholesale & retail | 2022 |
| Motor Sports Promotions | | 1996 |
| Motorads Limited | Information & communication | 2025 |
| Motorsport Master LP | | 2016 |
| Motorsport Security Event Limited | Administrative & support | 2016 |
| Motorsports Investment LP | | 2011 |
| Mototec Limited | Wholesale & retail | 2022 |
| Mototech (Scotland) Limited | Wholesale & retail | 2018 |
| Mots Consulting Limited | Professional & scientific | 2023 |
| Mouat Software Limited | Information & communication | 2022 |
| Mould and Co. | | 2002 |
| Moulinsart Medical Ltd | Health & social care | 2019 |
| Mouller Finance LP | | 2017 |
| Mount Blair Limited | Extraterritorial | 1988 |
| Mount Crystal LP | | 2016 |
| Mount Melville Limited | Agriculture & fishing | 1994 |
| Mount Stuart Renewables Limited | Energy | 2013 |
| Mount Stuart Trading Company Limited | Wholesale & retail | 2013 |
| Mount Trans Logistics LP | | 2014 |
| Mountain Cloud LP | | 2002 |
| Mountain Goat Films Ltd | Information & communication | 2024 |
| Mountain Guide Group LP | | 2016 |
| Mountain Momo Ltd | Hospitality | 2025 |
| Mountain Palm SP | | 2002 |
| Mountain Rain SP | | 2004 |
| Mountain Sky SP | | 2003 |
| Mountain Technology Ltd | Information & communication | 2023 |
| Mountain Valley LP | | 2003 |