| Mandator LP | | 2016 |
| Mandatum Limited | Professional & scientific | 2021 |
| Mandiyu LP | | 2025 |
| Mandrell Services LP | | 2013 |
| Mane Character Ltd | Other services | 2026 |
| Maneken International | | 2003 |
| Manety Property Limited | Real estate | 2022 |
| Mangezi Ltd | Information & communication | 2022 |
| Mango Esen Ltd | Hospitality | 2020 |
| Manhattan Peanuts (UK) Ltd | Manufacturing | 2013 |
| Mani Brother Granton Ltd | Wholesale & retail | 2025 |
| Mani Brothers Airdrie Ltd | Wholesale & retail | 2025 |
| Mani Brothers Limited | Wholesale & retail | 2022 |
| Mani Brothers West Granton Ltd | Wholesale & retail | 2026 |
| Mani Investments Ltd | Real estate | 2023 |
| Mania Edinburgh Limited | Hospitality | 2015 |
| Manifecta Trading LP | | 2019 |
| Manifex Smart LP | | 2017 |
| Manifold Research Centre Ltd | Manufacturing | 2021 |
| Manipulate Arts Ltd | Arts & recreation | 1996 |
| Manitoba LP | | 2016 |
| Manjen Food Ltd | Hospitality | 2023 |
| Manjob Systems Limited | Information & communication | 1998 |
| Mankay L.P. | | 2013 |
| Mannix International L.P. | | 2009 |
| Manny Plant Hire and Ground Works Ltd | Construction | 2022 |
| Manohrax Holdings Ltd | Wholesale & retail | 2025 |
| Manolova Consulting Limited | Professional & scientific | 2025 |
| Manor Developments Edinburgh Limited | Real estate | 2020 |
| Manor Estates Associates Limited | Real estate | 2008 |
| Manor Executive Suites Limited | Construction | 1983 |
| Manor Home Design Ltd | Construction | 2020 |
| Manor House Real Estate Limited | Real estate | 2010 |
| Manor International Solutions L.P. | | 2009 |
| Manor Place Developments Limited | Real estate | 2017 |
| Manor Place Property Limited | Real estate | 2025 |
| Manor United LP | | 2014 |
| Manora Corporation L.P. | | 2011 |
| Manordale Limited | Transport & logistics | 2000 |
| Manorhaven Limited | Extraterritorial | 2001 |
| Manoto Agency LP | | 2024 |
| MANRAY7 LLP | | 2024 |
| Mansel & Dorset LP | | 2009 |
| Mansell Automotive Ltd | Manufacturing | 2014 |
| Mansell Investments LP | | 2016 |
| Manseridge Limited | Professional & scientific | 2003 |
| Mansfield Care Group Limited | Financial services | 2016 |
| Mansfield Care Limited | Health & social care | 2007 |
| Mansfield Development (Eskbank) Limited | Health & social care | 2020 |
| Mansfield Development (Ferry Road) Limited | Construction | 2025 |
| Mansfield Development (Loanhead) Limited | Construction | 2022 |
| Mansfield Management Ltd | Professional & scientific | 2015 |
| Mansfield Traquair Trust | Real estate | 1995 |
| Mansford (UK) Co-Invest LP | | 2008 |
| Mansford CIP (GP) Limited | Administrative & support | 2008 |
| Mansford CIP LP | | 2008 |
| Mansford Core 2 (GP) Limited | Real estate | 2012 |
| Mansford Core 2 Property Portfolio LP | | 2013 |
| Mansford Core CIP (GP) Limited | Administrative & support | 2012 |
| Mansford Core CIP LP | | 2012 |
| Mansford Core Investors (GP) Limited | Administrative & support | 2012 |
| Mansford Core Investors LP | | 2012 |
| Mansford Core Property Portfolio LP | | 2012 |
| Mansford General Partner Limited Partnership | | 2008 |
| Mansford Investors (GP) Limited | Administrative & support | 2008 |
| Mansford Investors LP | | 2008 |
| Mansford Opportunities IV LP | | 2012 |
| Mansford Opportunities V LP | | 2015 |
| Mansford Opportunities VI LP | | 2019 |
| Mansford Opportunity Feeder LP | | 2008 |
| Mansford Opportunity Fund III LP | | 2008 |
| Mansford UK (Feeder a) GP Limited | Real estate | 2009 |
| Mansford UK (Feeder a) LP | | 2010 |
| Mansford UK Co-Invest (GP) Limited | Administrative & support | 2008 |
| Manshar Ltd | Information & communication | 2020 |
| Manshire Services Limited | Administrative & support | 2017 |
| Manson Architects Limited | Professional & scientific | 1978 |
| Manson Contracts Ltd | Administrative & support | 2026 |
| Manston Skyport Limited | Administrative & support | 2013 |
| Mantarai Limited | Information & communication | 2025 |
| Mantel (Edinburgh) Limited | Wholesale & retail | 2024 |
| Mantel Corp Properties Ltd | Real estate | 2022 |
| Mantel Worthy Ltd | Professional & scientific | 2025 |
| Mantex Organisation L.P. | | 2009 |
| Mantis Geophysics Limited | Information & communication | 2024 |
| Manttis Bay LP | | 2003 |
| Manuka Cherries Ltd | Wholesale & retail | 2026 |
| Manukan Management Ltd | Extraterritorial | 2012 |
| Manyi Travel Ltd | Administrative & support | 2016 |
| Manzanar SP | | 2002 |
| Manzi Electrical Limited | Construction | 2024 |
| Manzil Construction Ltd | Construction | 2023 |
| Maomao Property Investment Ltd | Real estate | 2026 |
| MAP Consult Ltd | Professional & scientific | 2016 |
| Mapa Firinn Ltd | Professional & scientific | 2022 |
| Mapi Consulting Limited | Administrative & support | 2003 |
| Mapify Limited | Information & communication | 2025 |
| Mapilab LP | | 2014 |
| Mapix Technologies Ltd. | Information & communication | 1996 |
| Maple and Spruce LP | | 2007 |