| Manchester Accounting UK Ltd | Professional & scientific | 2022 |
| Manchester Anaesthetic Services Limited | Health & social care | 2024 |
| Manchester Associated Mills Limited | Wholesale & retail | 1982 |
| Manchester Auto Electrical Limited | Wholesale & retail | 1993 |
| Manchester Automotive Limited | Wholesale & retail | 2012 |
| Manchester Back Office Services Ltd | Professional & scientific | 2022 |
| Manchester Bargain Plumbing Ltd | Wholesale & retail | 2020 |
| Manchester Bulgarian Community CIC | Administrative & support | 2026 |
| Manchester Car Movements Limited | Transport & logistics | 2018 |
| Manchester City Builders Ltd | Construction | 2023 |
| Manchester Commercial Holdings Limited | Financial services | 2023 |
| Manchester Commercial Ltd | Real estate | 2023 |
| Manchester Commercials & Sons (NW) Ltd | Wholesale & retail | 2016 |
| Manchester Congregation of Spanish and Portuguese Jews | Other services | 2017 |
| Manchester Consultants Ltd | Wholesale & retail | 2026 |
| Manchester Courier Company Limited | Information & communication | 1990 |
| Manchester Curries Ltd | Hospitality | 2026 |
| Manchester Drywall Limited | Construction | 1997 |
| Manchester Electrical Compliance Ltd | Construction | 2018 |
| Manchester Estates Ltd | Real estate | 2010 |
| Manchester Event Medical Solutions Ltd. | Health & social care | 2016 |
| Manchester GAS and Heating Ltd | Construction | 2022 |
| Manchester Handy and Telecoms Ltd | Wholesale & retail | 2022 |
| Manchester HK Ltd | Administrative & support | 2025 |
| Manchester Homeswares Ltd | Wholesale & retail | 2022 |
| Manchester Industrials Ltd | Real estate | 2021 |
| Manchester Jewish Philanthropic | Other services | 2007 |
| Manchester Jewish School for Special Education | Education | 2010 |
| Manchester Judaica Ltd | Wholesale & retail | 2019 |
| Manchester Leisure Holdings Limited | Real estate | 2018 |
| Manchester Neurotherapy Centre Ltd. | Health & social care | 2003 |
| Manchester Ohannes Ltd | Hospitality | 2021 |
| Manchester Padel Tennis Club Ltd | Arts & recreation | 2023 |
| Manchester Parkour Academy Ltd | Education | 2023 |
| Manchester Private Hire Ltd | Other services | 2015 |
| Manchester Senior Girls School | Education | 2010 |
| Manchester Skin Group Ltd | Other services | 2025 |
| Manchester Smart Education Ltd | Education | 2024 |
| Manchester Television Network Limited | Information & communication | 2011 |
| Manchester Tennis & Racquet Club Limited | Arts & recreation | 2016 |
| Manchester Waste Limited | Professional & scientific | 1999 |
| Manchouse Productions Ltd | Information & communication | 2023 |
| Mancunian Apartments Ltd | Construction | 2024 |
| Mancunian Estates Limited | Extraterritorial | 1981 |
| Mandalia Service Limited | Health & social care | 2023 |
| Mandeer Transport Ltd | Transport & logistics | 2023 |
| Mandin NO 3 Ltd | Extraterritorial | 2020 |
| Mandin NO 4 Ltd | Extraterritorial | 2020 |
| Mandin NO 5 Ltd | Extraterritorial | 2020 |
| Mandin NO 7 Ltd | Real estate | 2020 |
| Mandle Living Ltd | Manufacturing | 2023 |
| Manentia Advisory Ltd | Information & communication | 2026 |
| Manko Services Limited | Other services | 2011 |
| Manley Road Estates Limited | Real estate | 2019 |
| Manofmilesuk Ltd | Administrative & support | 2024 |
| Manor Court Nominees 2 Ltd | Extraterritorial | 2021 |
| Manor Court Nominees Ltd | Extraterritorial | 2021 |
| Manorton Ltd | Professional & scientific | 2004 |
| Manport Limited | Professional & scientific | 2020 |
| Mansam Products Limited | Wholesale & retail | 2009 |
| Mansfield Solutions Limited | Extraterritorial | 2019 |
| Manuel Swaden Limited | Professional & scientific | 2011 |
| Manuka AI Limited | Information & communication | 2016 |
| Manēr London Ltd | Wholesale & retail | 2021 |
| MAP IT Projects Ltd | Other services | 2024 |
| Mapalo Training (UK) Limited | Professional & scientific | 2024 |
| Maplewave Investments Limited | Real estate | 2015 |
| Maraman Limited | Real estate | 2023 |
| Marbim Ltd | Administrative & support | 2026 |
| Marble Contractors Ltd | Administrative & support | 2023 |
| Marble Rose Construction Ltd | Construction | 2024 |
| Marble Rose Estates Ltd | Real estate | 2023 |
| Marblestone Estates Ltd | Real estate | 2023 |
| Marc Darcy Group Limited | Professional & scientific | 2019 |
| Marc Darcy Holdings Limited | Professional & scientific | 1989 |
| Marc Darcy International Limited | Wholesale & retail | 2008 |
| Marc Davies Bespoke Interiors Limited | Construction | 2008 |
| Marc Williams Heating Engineers Limited | Extraterritorial | 2018 |
| Marches Care Limited | Health & social care | 1990 |
| Marcia G Consultancy Ltd | Education | 2022 |
| Marcon Media Ltd | Administrative & support | 2016 |
| Marcson Consulting Ltd. | Professional & scientific | 2013 |
| Marcuscurantis Limited | Financial services | 2025 |
| Marek Tyczynski Trans Ltd | Transport & logistics | 2015 |
| Marel Group Ltd | Administrative & support | 2019 |
| Marelli Automotive Systems Europe Ltd | Manufacturing | 1989 |
| Margal Estates Ltd | Real estate | 2022 |
| Margo L. Young Limited | Professional & scientific | 2025 |
| Margo Writes Things Ltd | Professional & scientific | 2024 |
| Maria Semedo Ltd. | Health & social care | 2015 |
| Mariama Jallow Healthcare Solution UK Limited | Health & social care | 2025 |
| Marina Qureshi Ltd | Manufacturing | 2019 |
| Marissa Holdings Limited | Administrative & support | 2019 |
| Mark Stanley Lighting Ltd | Information & communication | 2013 |
| Markanan Ltd | Construction | 2026 |
| Markden Homes Construction Limited | Construction | 2022 |
| Markden Homes Limited | Construction | 2022 |
| Markden Homes SPV 1 Limited | Construction | 2022 |
| Markden Homes SPV 2 Limited | Construction | 2022 |
| Markden Homes SPV 4 Limited | Construction | 2022 |