| Moores Rowland UK (Mruk) Limited | Extraterritorial | 2018 |
| Moores Window Cleaning Ltd | Other services | 2025 |
| Moorgrove Interiors Limited | Construction | 2008 |
| Moorhouse Farm Investments Limited | Agriculture & fishing | 2020 |
| Moorwell Property Limited | Real estate | 1999 |
| Moosa and Haroon Co Ltd | Wholesale & retail | 2024 |
| Moose Trading Co. Ltd | Real estate | 2016 |
| Mooving Boxes Ltd | Transport & logistics | 2021 |
| Mooving Estates Limited | Real estate | 2015 |
| MOP and Broom Cleaning Services Limited | Administrative & support | 2023 |
| Mopac Technologies Ltd | Information & communication | 2023 |
| Mopane Investment Company Limited | Professional & scientific | 2002 |
| Mopaway Ltd | Administrative & support | 2023 |
| Morad Sallam Limited | Health & social care | 2022 |
| Moraj Limited | Extraterritorial | 2021 |
| Morales Travel Ltd | Administrative & support | 2020 |
| Moran Group Capital Limited | Real estate | 2021 |
| Moran Homes Ltd | Real estate | 2024 |
| Moran Structural Consultants Limited | Professional & scientific | 2011 |
| Morayo Limited | Information & communication | 2020 |
| Morco Holding 1 Ltd | Households | 2024 |
| Morco Hospitality Ltd | Hospitality | 2026 |
| Morco Properties Ltd | Real estate | 2014 |
| Mordrive Ltd | Transport & logistics | 2025 |
| More Consultancy Services Ltd | Professional & scientific | 2023 |
| More OR Less Drinks Company Limited | Manufacturing | 2013 |
| More Starts Ltd | Administrative & support | 2022 |
| More Than Directors UN Limited | Professional & scientific | 2020 |
| More Than Limited | Manufacturing | 2023 |
| More Than Loft Ladders Franchise Development Ltd | Professional & scientific | 2022 |
| More Than Loft Ladders Limited | Extraterritorial | 2025 |
| Moreloved Care Ltd | Health & social care | 2020 |
| Morero Assets Ltd | Financial services | 2026 |
| Moreservices Ltd | Manufacturing | 2019 |
| Morestyle UK Limited | Construction | 2003 |
| MORETHAN3D Limited | Professional & scientific | 2019 |
| Moretime PA Services Ltd | Administrative & support | 2016 |
| Morevo Ltd | Wholesale & retail | 2025 |
| Morfose Barbers Notts Ltd | Other services | 2025 |
| Morgan & Company (Nottm) Ltd | Other services | 2019 |
| Morgan & Company Commerce Limited | Other services | 2018 |
| Morgan and Company Services Ltd | Other services | 2020 |
| Morgan Brothers Properties Ltd | Real estate | 2025 |
| Morgan Collective Ltd | Professional & scientific | 2026 |
| Morgan Cross Consulting Limited | Professional & scientific | 2009 |
| Morgan Electrical Contractors Ltd | Construction | 2015 |
| Morgan Gynaecology Ltd | Health & social care | 2022 |
| Morgan Housing Estates Limited | Real estate | 1946 |
| Morgan Jones Properties Ltd | Real estate | 2021 |
| Morgan Mainstays Limited | Hospitality | 2022 |
| Morgan Print Services Limited | Manufacturing | 2015 |
| Morgan Property Interiors Ltd | Real estate | 2019 |
| Morgan Storage Ltd | Transport & logistics | 2019 |
| Morgan Taylor Limited | Extraterritorial | 2018 |
| Morgan Visuals Ltd | Professional & scientific | 2025 |
| Morgans Windscreens Limited | Wholesale & retail | 1987 |
| Morley Lets Ltd | Real estate | 2025 |
| Morley Mills Management Company Limited | Households | 2001 |
| Morley Mills Nottingham RTM Company Limited | Households | 2015 |
| Morley-Brown Limited | Health & social care | 2025 |
| Morning Care Security Services Ltd | Other services | 2015 |
| Mornington Property Services Ltd | Construction | 2008 |
| Moroni 7 Records Ltd | Wholesale & retail | 2012 |
| Morose Consultant Ltd | Professional & scientific | 2025 |
| Morpeth Town V.E. Limited | Other services | 1999 |
| Morph Ecological Consultants Limited | Professional & scientific | 2020 |
| Morral & Sons Limited | Construction | 2014 |
| Morris Chapel Properties Limited | Real estate | 2024 |
| Morris Vermaport Limited | Manufacturing | 1998 |
| Morse Estates Ltd | Real estate | 2009 |
| Morsel Adventures Limited | Manufacturing | 2022 |
| Morte Ltd | Information & communication | 2017 |
| Mortec Projects Limited | Construction | 2018 |
| Mortech Systems Limited | Information & communication | 1998 |
| Mortgage Brokers Direct Ltd | Financial services | 2021 |
| Mortgage for Business Ltd. | Financial services | 2015 |
| Mortgage for YOU Solutions Ltd | Financial services | 2026 |
| Mortgage Link (Derby) Limited | Financial services | 2003 |
| Mortimer Duke Limited | Extraterritorial | 2019 |
| Mortimer QS Ltd | Construction | 2019 |
| Mortimer Recruitment Ltd | Administrative & support | 2023 |
| Mortl Ltd | Professional & scientific | 2025 |
| Morton Plumbing & Heating Limited | Construction | 2018 |
| Morton Property Services Ltd | Construction | 2019 |
| Mortonbentley Properties Ltd | Real estate | 2007 |
| Moruth Ltd | Transport & logistics | 2020 |
| Morvette Williams Consultancy Limited | Health & social care | 2011 |
| MOS Investments Limited | Real estate | 2006 |
| MOS Legals Limited | Professional & scientific | 2023 |
| Mosaic Estate Planning Limited | Professional & scientific | 2025 |
| Mosaic Events Planner Ltd | Hospitality | 2025 |
| Moshah Enterprises Limited | Information & communication | 2024 |
| Moshe-Aron Care Ltd | Administrative & support | 2018 |
| Mosiqi Animation Studio Ltd | Information & communication | 2025 |
| MOSKO76 Limited | Transport & logistics | 2010 |
| Moss & Beecham Building Supplies Ltd | Construction | 2017 |
| Moss & Brown Ltd | Construction | 2024 |
| Most Admired Ltd | Arts & recreation | 2017 |
| Most Valued Property Ltd | Real estate | 2025 |
| Mostins Limited | Real estate | 2025 |