| Morgiv Global Ltd | Manufacturing | 2022 |
| Morii Studios Limited | Information & communication | 2019 |
| Morish Jems Ltd. | Manufacturing | 2015 |
| Moritix Ltd | Information & communication | 2019 |
| Morland and Co Limited | Real estate | 2014 |
| Morley House Limited | Households | 2018 |
| Morley's (Fast Foods) Limited | Other services | 1996 |
| Morley's (UK) Limited | Other services | 2005 |
| Morley's Dcrl Limited | Hospitality | 2026 |
| Morley's International Limited | Administrative & support | 2018 |
| Morleys Kent Ltd | Hospitality | 2025 |
| Mornicrest Limited | Wholesale & retail | 1981 |
| Morningfresh Ltd | Hospitality | 2024 |
| Moroccan Decor Ltd | Wholesale & retail | 2016 |
| Morouj Commodities UK Limited | Wholesale & retail | 2017 |
| Morpankhcloset Ltd | Wholesale & retail | 2026 |
| Morphitects Ltd | Construction | 2025 |
| Morris House NH Ltd | Households | 2022 |
| Morrison Fleming Limited | Real estate | 2026 |
| Morrissey Electrical Limited | Construction | 2019 |
| Morston Properties Ltd | Real estate | 2023 |
| Mortgage & Life Limited | Financial services | 2017 |
| Mortgage Advice ME Ltd | Financial services | 2020 |
| Mortgage Finance Specialists Ltd | Financial services | 2023 |
| Mortgage for Your Home Limited | Financial services | 2026 |
| Mortgage Guarantee 2025 Limited | Financial services | 2026 |
| Mortgage Guarantee Limited | Financial services | 1980 |
| Mortgage Track Limited | Financial services | 2007 |
| Moruju Construction Ltd | Construction | 2014 |
| Mosaic Counselling Services CIC | Health & social care | 2015 |
| Mosaic Films Limited | Information & communication | 2002 |
| Mosaic Recruitment Solutions Ltd | Administrative & support | 2019 |
| Mosaics of Cancer Ltd | Professional & scientific | 2024 |
| Moses Mobility Ltd | Information & communication | 2015 |
| Mosfilo LLP | | 2017 |
| Mosfilo Trading Limited | Real estate | 2023 |
| Mosfin Traders Ltd | Wholesale & retail | 2009 |
| Mosms Ltd | Information & communication | 2022 |
| Moss Automotive Storage Ltd | Hospitality | 2018 |
| Moss Croft Limited | Professional & scientific | 2015 |
| Mossymex Limited | Real estate | 2022 |
| Mostly Solutions Ltd | Wholesale & retail | 2025 |
| Motac Group Limited | Financial services | 2024 |
| Motacus Builders Merchants Limited | Wholesale & retail | 2019 |
| Motacus Constructions Limited | Construction | 2005 |
| Motacus Limited | Construction | 2006 |
| Motacus Plumbing & Heating Limited | Construction | 2020 |
| Mote Road Development Ltd | Construction | 2024 |
| Mote Road Holdco Limited | Real estate | 2024 |
| Mother & Baby Care Collective Limited | Health & social care | 2026 |
| Mother Trucker Limited | Other services | 2003 |
| Motherlabs Limited | Wholesale & retail | 2026 |
| Motherland(Uk) Ltd | Wholesale & retail | 2020 |
| Mothr Limited | Information & communication | 2025 |
| Motion Architecture Ltd | Professional & scientific | 2005 |
| Motion Clothing Ltd | Wholesale & retail | 2024 |
| Motion Food Studio Limited | Hospitality | 2025 |
| Motion Picture Capital Limited | Information & communication | 2011 |
| Motion Picture Production Ltd | Information & communication | 2026 |
| Motion Technology (UK) Limited | Other services | 2014 |
| Motionmeter Limited | Arts & recreation | 1988 |
| Motiv Sports UK Limited | Arts & recreation | 2013 |
| Motive Unknown Limited | Professional & scientific | 2014 |
| Motivex Recruitment Ltd | Transport & logistics | 2023 |
| Moto Decals Ltd | Professional & scientific | 2018 |
| Motor Capital London Limited | Wholesale & retail | 2025 |
| Motordoc Limited | Wholesale & retail | 2012 |
| Motormatchfinance Ltd | Financial services | 2025 |
| Motors & More Limited | Wholesale & retail | 2021 |
| Motorsuk Limited | Construction | 2018 |
| Motorvation Matters Ltd | Education | 2023 |
| Motovans Limited | Wholesale & retail | 2017 |
| Motter Investments Limited | Real estate | 2023 |
| Motter Limited | Health & social care | 2021 |
| Moucuti Limited | Construction | 2019 |
| Moulati Zanine Ltd | Professional & scientific | 2022 |
| Moumit.Art Limited | Arts & recreation | 2026 |
| Mount Sinai Holdings Limited | Financial services | 2009 |
| Mount Wollaton Associates Limited | Financial services | 2024 |
| Mountain Chefs Ltd | Other services | 2023 |
| Mountaire Court Management Company Limited | Households | 1999 |
| Mountcross Limited | Construction | 2006 |
| Mountprint Limited | Other services | 2010 |
| Mountside Construction Ltd | Construction | 2003 |
| Mountside Investments Ltd | Real estate | 2023 |
| Mountview Consultancy Limited | Professional & scientific | 2024 |
| Moura INK Limited | Wholesale & retail | 2022 |
| Mourya Jewells Ltd | Wholesale & retail | 2018 |
| Mousecky Limited | Households | 1978 |
| MOV Locator Ltd | Real estate | 2017 |
| Move in Properties Limited | Real estate | 2009 |
| MOVE4WORLD Ltd | Transport & logistics | 2019 |
| Movement for Self-Determination of Tamil Eelam Limited | Health & social care | 2024 |
| Moviegoers Entertainment Limited | Information & communication | 2020 |
| Moving Pictures Ltd | Information & communication | 2011 |
| Moving the Needle CIC | Education | 2022 |
| Mowai Properties Limited | Other services | 2007 |
| Mowgli Estates Limited | Real estate | 2015 |
| Moxto Tech and Consultancy Ltd | Manufacturing | 2023 |
| MOY Atelier Ltd | Wholesale & retail | 2017 |