| Moosa Properties Limited | Real estate | 2021 |
| Moosey Goosey Holdings Limited | Real estate | 2025 |
| Moov Logistics Solutions Limited | Transport & logistics | 2024 |
| Moova Fitness Ltd | Arts & recreation | 2019 |
| MOR Partners Ltd | Hospitality | 2023 |
| MOR.E26 Ltd | Manufacturing | 2019 |
| Moran Developments (Yorkshire) Ltd | Construction | 2015 |
| Morar Consultancy Ltd | Professional & scientific | 2023 |
| Moray Group Limited | Financial services | 2019 |
| More (UK) Limited | Wholesale & retail | 2001 |
| More 4 Less Leeds Limited | Wholesale & retail | 2011 |
| More Bamboo Ltd | Professional & scientific | 2024 |
| More Life Limited | Professional & scientific | 2003 |
| More Machine Limited | Information & communication | 2015 |
| More Room Ltd | Construction | 2022 |
| More Tea Design Limited | Professional & scientific | 2012 |
| More Than a Footballer Ltd | Information & communication | 2024 |
| More Than Monkeys Limited | Information & communication | 2017 |
| More Vapes Ltd | Wholesale & retail | 2021 |
| MORE2MINDS Clinical Hypnotherapy Ltd | Other services | 2023 |
| Moreability Limited | Construction | 2003 |
| Moreby Wealth Limited | Financial services | 2023 |
| Moreco Developments Ltd | Real estate | 2023 |
| Moreco Energy Ltd | Administrative & support | 2025 |
| Moreco EV Ltd | Real estate | 2022 |
| Moreco Investments Ltd | Real estate | 2025 |
| Moreeco Group Ltd | Real estate | 2022 |
| Moreeco Ltd | Administrative & support | 2022 |
| Moreira Clean Ltd | Administrative & support | 2024 |
| Morely Group Ltd | Administrative & support | 2021 |
| Morevision Limited | Information & communication | 1990 |
| Morfind 2019 Limited | Extraterritorial | 2015 |
| Morfind 2020 Limited | Extraterritorial | 2015 |
| Morfind 2022 Limited | Extraterritorial | 2010 |
| Morfind 2023 Limited | Extraterritorial | 2010 |
| Morfind 2024 Limited | Extraterritorial | 2010 |
| Morfind 2025 Limited | Extraterritorial | 1996 |
| Morfind 2026 Limited | Extraterritorial | 1995 |
| Morfind 2027 Limited | Extraterritorial | 2001 |
| Morfind 2028 Limited | Extraterritorial | 2007 |
| Morfind 2029 Limited | Extraterritorial | 1996 |
| Morfind 2030 Limited | Extraterritorial | 1983 |
| Morfitt Shaw Limited | Real estate | 2003 |
| Morgan & Fenwick Ltd | Manufacturing | 2019 |
| Morgan Agency Limited | Professional & scientific | 2011 |
| Morgan Anaesthesia | Health & social care | 2018 |
| Morgan Architecture Plus Limited | Professional & scientific | 2011 |
| Morgan Bros Properties Ltd | Real estate | 2021 |
| Morgan Brothers Ltd | Professional & scientific | 2018 |
| Morgan Charlesworth Ltd | Real estate | 2018 |
| Morgan Fenton Limited | Administrative & support | 2024 |
| Morgan Fleming & Partners Limited | Administrative & support | 2024 |
| Morgan Menzies Consultancy Limited | Administrative & support | 2021 |
| Morgan Properties (Cleethorpes) Ltd | Real estate | 2025 |
| Morgan Research Limited | Information & communication | 2020 |
| Morgan Travel Limited | Administrative & support | 2001 |
| Morgan-Head Properties Ltd | Real estate | 2019 |
| Morgan-Jupiter Assets Management (UK) Limited | Real estate | 2021 |
| Morgan-Jupiter Investment Ltd | Real estate | 2021 |
| Morgardening Limited | Administrative & support | 2026 |
| Morhen Group Limited | Wholesale & retail | 2023 |
| Moriscar Limited | Professional & scientific | 2019 |
| Morkunas Properties Ltd | Real estate | 2024 |
| Morland Technology Limited | Information & communication | 2019 |
| Morley Cars Ltd | Wholesale & retail | 2023 |
| Morley Central Line Ltd | Transport & logistics | 2025 |
| Morley Chinese Acupuncture&Herbs Ltd | Health & social care | 2011 |
| Morley Doors & Windows Ltd | Administrative & support | 2011 |
| Morley Ducting Limited | Manufacturing | 2012 |
| Morley Fencing & Landscaping Ltd | Administrative & support | 2015 |
| Morley Fisheries Ltd | Hospitality | 2025 |
| Morley Glass & Glazing Limited | Manufacturing | 1998 |
| Morley Grocery & Polish Shop Ltd | Hospitality | 2018 |
| Morley Hotels and Leisure Limited | Hospitality | 1990 |
| Morley Leeds Ltd | Wholesale & retail | 2025 |
| Morley Leisure Centre Cafe Ltd | Hospitality | 2023 |
| Morley Live C.I.C. | Arts & recreation | 2025 |
| Morley Mobiles Limited | Wholesale & retail | 2017 |
| Morley MOT & Service Centre Limited | Administrative & support | 2010 |
| Morley Motor Spares Limited | Wholesale & retail | 2014 |
| Morley Pizza & Kebab House Ltd | Hospitality | 2023 |
| Morley Property Investments Ltd | Real estate | 2020 |
| Morley Real Estate Limited | Real estate | 2025 |
| Morley Vehicle Repairs Limited | Wholesale & retail | 2021 |
| Morley Ventilation Limited | Construction | 2008 |
| Morleychallengersbc CIC | Arts & recreation | 2024 |
| Mornington Builders Limited | Construction | 2004 |
| Moroak-Ney Ltd | Professional & scientific | 2024 |
| Moroccorintal Ltd | Hospitality | 2019 |
| Morphosis Limited | Real estate | 2018 |
| Morrell Vision Care Limited | Health & social care | 2013 |
| Morrells Window Cleaning Ltd | Administrative & support | 2021 |
| Morris Building Services Ltd | Construction | 2023 |
| Morris Electrical (Yorkshire) Limited | Construction | 2022 |
| Morris Engineering Group Ltd | Professional & scientific | 2019 |
| Morris Hype Mart Ltd | Wholesale & retail | 2025 |
| Morris Infrastructure Group UK Ltd | Construction | 2018 |
| Morris Property Pioneers Ltd | Real estate | 2019 |
| Morrish Solicitors LLP | | 2009 |
| Mortalman Limited | Hospitality | 2016 |