| Mobile Engine Rebuilds Ltd | Wholesale & retail | 2024 |
| Mobile House Ltd. | Wholesale & retail | 2018 |
| Mobile Miracles Limited | Wholesale & retail | 2019 |
| Mobile Nexus Limited | Wholesale & retail | 2025 |
| Mobile Point EM Ltd | Wholesale & retail | 2020 |
| Mobile Salutation Limited | Wholesale & retail | 2025 |
| Mobile Truck and BUS Engineering Ltd. | Extraterritorial | 2015 |
| Mobile Tyre Runner Ltd | Wholesale & retail | 2024 |
| Mobile Windscreens Limited | Wholesale & retail | 1978 |
| Mobilehubnottingham Limited | Wholesale & retail | 2020 |
| Mobiles and Computers LAB Limited | Wholesale & retail | 2016 |
| Mobiles Plus Repairs Ltd | Other services | 2019 |
| Mobilestyle UK Trading Limited | Wholesale & retail | 2016 |
| Mobilewand Repairs Ltd | Manufacturing | 2020 |
| Mobisist Direct Ltd | Health & social care | 2009 |
| Mobisport UK Ltd | Wholesale & retail | 2017 |
| Mobius Language Services Limited | Professional & scientific | 2004 |
| Mobius Waste Management Ltd | Water & waste | 2024 |
| Mobivana Ltd | Wholesale & retail | 2025 |
| Mobooms Care Services Ltd | Administrative & support | 2022 |
| Mobytap Ltd | Administrative & support | 2016 |
| Mochridhe (Edinburgh and Lothians) Services Limited | Professional & scientific | 2020 |
| Mockrock Limited | Construction | 2018 |
| MOD (1975) (OF2) Pension Fund Limited | Financial services | 2020 |
| MOD Environmental Limited | Construction | 2019 |
| MOD Minds Ltd | Information & communication | 2024 |
| Mod.E.L Venture Holdings Limited | Financial services | 2024 |
| Modabo Ltd | Real estate | 2017 |
| Modaki Limited | Wholesale & retail | 2024 |
| Mode Consulting Solutions Limited | Professional & scientific | 2017 |
| Mode Interiors (Nottm) Ltd | Construction | 2016 |
| Mode Visuals Ltd | Arts & recreation | 2022 |
| Model 3 Ltd | Transport & logistics | 2026 |
| Model of the Universe Organisation Limited | Arts & recreation | 2020 |
| Model of the World Organisation Limited | Arts & recreation | 2020 |
| Model Students Limited | Professional & scientific | 2010 |
| Modelprop Ltd | Professional & scientific | 2023 |
| Moderate Security Services Ltd | Administrative & support | 2025 |
| Modern Classics Inc Ltd | Wholesale & retail | 2024 |
| Modern Design Solutions Limited | Professional & scientific | 2023 |
| Modern Flexible Packaging Ltd | Manufacturing | 2023 |
| Modern Life Healthcare Ltd | Hospitality | 2023 |
| Modern Methods Training Limited | Education | 2012 |
| Modern Oak Developments Ltd | Construction | 2024 |
| Modern Physiotherapy Care Ltd | Health & social care | 2024 |
| Modern Telecoms Consultants Limited | Information & communication | 2006 |
| Modern Wealth Ltd | Professional & scientific | 2013 |
| Modern Workwear Ltd | Wholesale & retail | 2019 |
| Modernity by Design Ltd | Administrative & support | 2013 |
| Modesh Ltd | Extraterritorial | 2022 |
| Modestanbul Ltd | Wholesale & retail | 2024 |
| Modestly Ltd | Wholesale & retail | 2026 |
| Modo Cogitandi Ltd | Health & social care | 2022 |
| Modoire Limited | Wholesale & retail | 2026 |
| Modular Conveyor Systems Limited | Professional & scientific | 2022 |
| Modular Metering Solutions Limited | Professional & scientific | 2022 |
| Modules 4 Automation Ltd | Manufacturing | 2021 |
| Moed Consulting Limited | Information & communication | 1998 |
| Moffat Academy Limited | Health & social care | 2016 |
| Moffat Kemp Ltd | Real estate | 2024 |
| Mogador MR Ltd | Hospitality | 2025 |
| MOH Player Limited | Information & communication | 2012 |
| Mohammadbashir Logistics Ltd | Transport & logistics | 2025 |
| Mohammed Sayeed (Group) Ltd | Other services | 2024 |
| Mohan and Mehrotra Specialist Medical Services Limited | Health & social care | 2015 |
| Mohd Enterprises Ltd | Financial services | 2026 |
| Mohid Innovative Ltd | Wholesale & retail | 2023 |
| Mohinder Investments Limited | Real estate | 2024 |
| Moholondon Limited | Professional & scientific | 2014 |
| Mohr Limited | Real estate | 2009 |
| Moiz Traders Limited | Wholesale & retail | 2017 |
| Mojatu Limited | Information & communication | 2011 |
| Mojo Athletic Limited | Information & communication | 2020 |
| Mojo Soft Ltd | Information & communication | 2018 |
| Mokka Desserts Ltd | Hospitality | 2026 |
| Molahmedia Ltd | Information & communication | 2023 |
| Molars and More Limited | Health & social care | 2020 |
| Molecularspray Ltd | Manufacturing | 2008 |
| Moleface Limited | Hospitality | 2008 |
| Moles Monsonis Limited | Health & social care | 2016 |
| Moli Holdings Ltd | Financial services | 2025 |
| Mollie MAY Ltd | Health & social care | 2022 |
| Mollis Fried Chicken Ltd | Hospitality | 2024 |
| Molly Angell Property Ltd | Real estate | 2023 |
| Molly's Cleaning Fairies Ltd | Administrative & support | 2025 |
| MOM Incubators Ltd. | Manufacturing | 2014 |
| Moma Breastfeeding Community Interest Company | Education | 2025 |
| Momdad Ltd | Wholesale & retail | 2023 |
| Momentum Associates Limited | Professional & scientific | 2009 |
| Momken Stone Ltd | Construction | 2024 |
| Momma Bains Ltd | Hospitality | 2020 |
| Momo Khim Limited | Hospitality | 2025 |
| Momo's Home and Gardening Services Ltd | Construction | 2025 |
| Monaco Gedling Limited | Hospitality | 2018 |
| Monaco Living Ltd | Real estate | 2025 |
| Monaghan Insight Ltd | Information & communication | 2026 |
| Monaj Ltd | Wholesale & retail | 2024 |
| Monala Estates Ltd | Real estate | 2024 |
| Monarate Limited | Real estate | 1997 |
| Monarch Acoustics (SPV) Limited | Manufacturing | 2012 |