| Manshraj Property Ltd | Real estate | 2024 |
| Mansoor Commerce Ltd | Wholesale & retail | 2026 |
| Manston Court (Torquay) Limited | Households | 1979 |
| Manta Financial Limited | Professional & scientific | 2015 |
| Manta Marine Ltd | Other services | 2017 |
| Manta RAY Imaging Ltd | Health & social care | 2018 |
| Mantis Shrimp Limited | Hospitality | 2025 |
| Mantis Tattoo Ltd | Other services | 2025 |
| Mantle Partners Global Ltd. | Information & communication | 2023 |
| Mantra Co Group Ltd | Professional & scientific | 2025 |
| Mantri Insights Ltd | Information & communication | 2018 |
| Mantrose UK Limited | Manufacturing | 1995 |
| Manu Botanicals Limited | Manufacturing | 2026 |
| Manual Therapy Solutions Ltd | Health & social care | 2025 |
| Manufacturing Systems Engineering Ltd | Professional & scientific | 2022 |
| Manvers House Trowbridge Limited | Real estate | 2024 |
| Many Hands Circus Ltd | Arts & recreation | 2024 |
| Manzoor Store (UK) Ltd | Wholesale & retail | 2019 |
| MAP Automotive Limited | Wholesale & retail | 2001 |
| MAP Electrical Contractors Ltd | Energy | 2012 |
| MAP Health Care Ltd | Administrative & support | 2015 |
| MAP Impact Ltd | Professional & scientific | 2023 |
| MAP Interim Services Limited | Professional & scientific | 2011 |
| MAP Maintenance (SW) Ltd | Construction | 2022 |
| MAP Space Ltd | Real estate | 2024 |
| MAP Technical SW Ltd | Construction | 2014 |
| Mapatasi Limited | Real estate | 2002 |
| Mapedge Ltd | Professional & scientific | 2025 |
| Maphi Limited | Construction | 2022 |
| Maple & Fleur Photography Ltd | Professional & scientific | 2022 |
| Maple (107) Limited | Households | 1996 |
| Maple (128) Limited | Households | 1998 |
| Maple (129) Limited | Households | 1998 |
| Maple (164) Limited | Households | 2001 |
| Maple (232) Limited | Households | 2004 |
| Maple (253) Limited | Households | 2005 |
| Maple (273) Limited | Households | 2005 |
| Maple (411) Limited | Households | 2016 |
| Maple (459) Limited | Households | 2020 |
| Maple (461) Limited | Households | 2020 |
| Maple (473) Limited | Households | 2022 |
| Maple (486) Limited | Households | 2023 |
| Maple (490) Limited | Households | 2023 |
| Maple (491) Limited | Households | 2023 |
| Maple (493) Limited | Households | 2023 |
| Maple (494) Limited | Households | 2024 |
| Maple (496) Limited | Households | 2024 |
| Maple (497) Limited | Households | 2024 |
| Maple (498) Limited | Households | 2024 |
| Maple (502) Limited | Households | 2024 |
| Maple (503) Limited | Households | 2024 |
| Maple (505) Limited | Households | 2024 |
| Maple (506) Limited | Households | 2024 |
| Maple (507) Limited | Households | 2024 |
| Maple (508) Limited | Households | 2025 |
| Maple (509) Limited | Households | 2025 |
| Maple (510) Limited | Households | 2025 |
| Maple (511) Limited | Households | 2025 |
| Maple (512) Limited | Households | 2025 |
| Maple (513) Limited | Households | 2025 |
| Maple (514) Limited | Households | 2025 |
| Maple (515) Limited | Households | 2025 |
| Maple Construction & Design Limited | Construction | 2014 |
| Maple Drive (Stoke Bishop) Management Company Limited | Real estate | 2015 |
| Maple Floor Limited | Construction | 2024 |
| Maple Glen Ltd | Construction | 2025 |
| Maple Interiors Bristol Ltd | Construction | 2024 |
| Maple Leaf (Investments) Limited | Real estate | 2018 |
| Maple Leaf (Property Ventures) Limited | Real estate | 2005 |
| Maple Pensions Limited | Financial services | 2017 |
| Maple Property Development Somerset Limited | Real estate | 2025 |
| Maple Tree Psychology Limited | Health & social care | 2022 |
| Maple Valley Ltd | Construction | 2017 |
| Maplebrook Edge Network Ltd | Administrative & support | 2023 |
| Maplebrook Funeral Plans Trustees Limited | Other services | 2019 |
| Maplebrook Group Limited | Professional & scientific | 2020 |
| Maplebrook Wills North Somerset Limited | Professional & scientific | 2019 |
| Maples Community Care Limited | Health & social care | 1994 |
| Maples Community Housing Limited | Health & social care | 1998 |
| Maples Holdings Limited | Financial services | 2018 |
| Mapometer Limited | Information & communication | 2010 |
| Mapstack Ltd | Information & communication | 2022 |
| Mapstone HR Limited | Administrative & support | 2022 |
| Mapstone Rise (NO.2) Management Ltd | Households | 2014 |
| Mara Business Solution Ltd | Extraterritorial | 2023 |
| Mara Engineering Ltd | Manufacturing | 2023 |
| Mara Property Management Ltd | Real estate | 2024 |
| Maraila Properties Ltd | Real estate | 2018 |
| Marand Ltd | Transport & logistics | 2014 |
| Marauder United Ltd | Wholesale & retail | 2025 |
| Marbal Associates Limited | Professional & scientific | 2009 |
| Marbble Events Ltd | Hospitality | 2019 |
| Marbelladevco Ltd | Construction | 2011 |
| Marble & Granite Interiors Limited | Wholesale & retail | 2025 |
| Marble Flooring Specialists Limited | Construction | 1948 |
| Marble Mosaic Co. (Properties) Limited(The) | Real estate | 1983 |
| Marble Sage Ltd | Real estate | 2021 |
| Marble Supreme Ltd | Manufacturing | 2007 |
| Marc Fletcher Carpentry Ltd | Construction | 2014 |
| Marc MAY Ltd | Information & communication | 2019 |