| Maloka Investments Limited | Real estate | 2025 |
| Malonetrimz Ltd | Other services | 2025 |
| Malpass Automotive Properties Limited | Real estate | 2025 |
| Malpass Group Limited | Real estate | 2025 |
| Malpass Investments Limited | Financial services | 2025 |
| Malthead Ltd | Real estate | 2025 |
| Malzardshomes Ltd | Real estate | 2025 |
| MAM Services Derby Ltd | Construction | 2022 |
| MAM TOR Publishing Ltd | Information & communication | 2004 |
| Mama Blossom Limited | Education | 2020 |
| Mama Holding One Ltd | Real estate | 2025 |
| Mamba Payroll Ltd | Professional & scientific | 2024 |
| Mambo Mobile Bars Limited | Hospitality | 2016 |
| Mamma MIA Hull Ltd | Hospitality | 2024 |
| Mamma Mia's Takeaway Ltd | Hospitality | 2020 |
| Mammoth Contracts Ltd | Professional & scientific | 2024 |
| Mamo Derby Limited | Other services | 2025 |
| MAN and Van Courier Ltd | Transport & logistics | 2023 |
| MAN LEE (Derby) Limited | Hospitality | 2002 |
| Manaforge Games Limited | Wholesale & retail | 2024 |
| Managed Healthcare Solutions Limited | Administrative & support | 2024 |
| Management Holdings Ltd | Financial services | 2016 |
| Manan Properties Limited | Real estate | 2017 |
| Manchester Tamatanga Limited | Hospitality | 2024 |
| Mand T.A Limited | Wholesale & retail | 2020 |
| Mandair Enterprises Ltd | Real estate | 2023 |
| Mandesh Johal Ltd | Administrative & support | 2016 |
| Mandio Ltd | Information & communication | 2023 |
| Mandy Kelly Limited | Professional & scientific | 2003 |
| Manform Limited | Professional & scientific | 2015 |
| Mango (Eco) Ltd | Agriculture & fishing | 2021 |
| Mango Hill Ltd | Professional & scientific | 2018 |
| Mango Support Ltd | Information & communication | 2022 |
| Mango Transport Ltd | Transport & logistics | 2022 |
| Mangobee Ltd | Wholesale & retail | 2025 |
| Manguard Electrical Security Limited | Construction | 2012 |
| Manhattan Trading Group Limited | Education | 2017 |
| Manhaus Grooming Ltd | Other services | 2025 |
| Mani Electrical Ltd | Construction | 2019 |
| Manii MZD Ltd | Wholesale & retail | 2025 |
| Manik Architects Ltd | Professional & scientific | 2022 |
| Manitty Limited | Extraterritorial | 2012 |
| Manku Accounting Services Ltd | Professional & scientific | 2023 |
| Manmar Security Doors Ltd | Manufacturing | 2023 |
| Mann & Co Property Ltd | Real estate | 2025 |
| Mann 13 Ltd | Transport & logistics | 2026 |
| Mann Acquisitions 1956 Ltd | Real estate | 2024 |
| Mann Acquisitions Ltd | Real estate | 2023 |
| Mann Brothers Transport Ltd | Transport & logistics | 2017 |
| Mann Global Trading Company Ltd | Wholesale & retail | 2011 |
| Mann-Uk Ltd | Transport & logistics | 2015 |
| Manna Haulage Limited | Transport & logistics | 2025 |
| Manns Enterprises (Derby) Limited | Real estate | 2016 |
| Mannwealth Limited | Transport & logistics | 2009 |
| Manor Arch Ltd | Construction | 2020 |
| Manor Court Management Company (Barrow on Trent) Limited | Administrative & support | 1993 |
| Manor Farm Barns (Breadsall 2009) Management Company Limited | Households | 2009 |
| Manor Farm Mickleover RMC Ltd | Households | 2024 |
| Manor Financial Services Limited | Administrative & support | 2016 |
| Manor Flooring Derby Ltd | Construction | 2022 |
| Manor Gardens (Derby) Management Company Limited | Real estate | 2004 |
| Manor House (Derby) Limited | Construction | 2023 |
| Manor House Block One Ltd | Real estate | 2024 |
| Manor House Shardlow Limited | Real estate | 2025 |
| Manor Lodge Consultants Limited | Real estate | 1996 |
| Manor Lodge Investment Ltd | Real estate | 2008 |
| Manor Park Consultants Limited | Real estate | 2000 |
| Manor Property Projects Limited | Professional & scientific | 2018 |
| Manor Vans Limited | Administrative & support | 2023 |
| Manorhouse Building Services Ltd | Construction | 2017 |
| Mansa Holdings Ltd | Financial services | 2024 |
| Mansell Furniture Company Limited | Wholesale & retail | 2010 |
| Mansfield Road Properties Limited | Real estate | 1999 |
| Mansha Healthcare Limited | Wholesale & retail | 2022 |
| Mansha Traders Limited | Wholesale & retail | 2025 |
| Mantar Holdings Ltd | Financial services | 2024 |
| Mantawin Limited | Extraterritorial | 1989 |
| Mantis (Eco) Ltd | Agriculture & fishing | 2021 |
| Mantis Body & Mind Ltd | Arts & recreation | 2022 |
| Mantis Gym Ltd | Arts & recreation | 2025 |
| Manusamoa Tuilagi (UK) Ltd | Other services | 2013 |
| Manx Engines Limited | Wholesale & retail | 2001 |
| Maochang DAI Limited | Wholesale & retail | 2026 |
| MAP- Mega Affordable Products Ltd | Wholesale & retail | 2025 |
| Mapcomms Limited | Professional & scientific | 2020 |
| Mapesea Limited | Hospitality | 2022 |
| Maple Accountancy Group Limited | Professional & scientific | 2013 |
| Maple Accountancy Limited | Professional & scientific | 2007 |
| Maple Accounting Ltd | Extraterritorial | 2018 |
| Maple Contracts Derby Limited | Construction | 2003 |
| Maple Employment Ltd | Extraterritorial | 2008 |
| Maple Financial Solutions Ltd | Financial services | 2013 |
| Maple House Capital Ltd | Professional & scientific | 2020 |
| Maple IT Services Ltd | Information & communication | 2020 |
| Maple Joinery Services (Derby) Limited | Construction | 2002 |
| Maple Leaf Lifestyle Medicine Ltd | Health & social care | 2024 |
| Maple Tree Studio Ltd | Information & communication | 2024 |
| Maple Trinity Healthcare Ltd | Health & social care | 2024 |
| Maple York Care Group Limited | Health & social care | 2008 |
| Mapleton Blinds Limited | Construction | 2021 |