| Moto-Tech Fleet Servicing Limited | Wholesale & retail | 2002 |
| Moto-Tech Holdings Limited | Financial services | 2021 |
| Moto-Tech Properties Limited | Real estate | 2021 |
| Motor Accident Solicitors Society | Other services | 2016 |
| Motor Dock Ltd | Wholesale & retail | 2024 |
| Motor Sales Bristol Limited | Wholesale & retail | 2025 |
| Motor Selection Ltd | Wholesale & retail | 2021 |
| Motor Strategies Ltd | Administrative & support | 2011 |
| Motorange - Bristol Ltd | Wholesale & retail | 2025 |
| Motorbase Bristol Ltd | Wholesale & retail | 2026 |
| Motorflix Ltd | Manufacturing | 2020 |
| Motorgraph Ltd | Wholesale & retail | 2023 |
| Motorhome and Campervan Services Ltd | Manufacturing | 2025 |
| Motornova Ltd | Wholesale & retail | 2020 |
| Motoron Holdings Limited | Financial services | 2021 |
| Motorsport Inspired Ltd | Other services | 2024 |
| Motorsports Hub Ltd | Wholesale & retail | 2025 |
| Motorweld Limited | Wholesale & retail | 1998 |
| Motowa Care Limited | Health & social care | 2018 |
| Mott Properties Investment Ltd | Real estate | 2025 |
| Motto Media Limited | Information & communication | 2023 |
| Motus Investment Limited | Administrative & support | 2013 |
| Motus Recruitment Limited | Administrative & support | 2024 |
| Mouflon Ltd | Professional & scientific | 2025 |
| Moulder Joinery Limited | Manufacturing | 2000 |
| Mouldsurv Ltd | Extraterritorial | 2026 |
| Mounds Court Properties Ltd | Real estate | 2024 |
| Mount Athos Advisory Ltd | Professional & scientific | 2026 |
| Mount Elton Limited | Professional & scientific | 2011 |
| Mount Everest Construction Ltd | Construction | 2019 |
| Mount KIP Holdings Limited | Administrative & support | 2019 |
| Mount Pleasant Management Company Limited | Households | 1988 |
| Mount Pleasant Solar Farm Limited | Energy | 2021 |
| Mount Pleasant Trees Limited | Manufacturing | 2003 |
| Mount Soleil Limited | Other services | 2007 |
| Mount Tech Retail Ltd | Wholesale & retail | 2021 |
| Mount's Bay Smokery Limited | Manufacturing | 2025 |
| Mountain Civil Engineering Consultancy Limited | Professional & scientific | 2007 |
| Mountain Property Ventures Ltd | Real estate | 2018 |
| Mountain Range Limited | Administrative & support | 2000 |
| Mountain Reprographics Ltd | Professional & scientific | 2022 |
| Mountain RUG Cleaning Ltd | Other services | 2022 |
| Mountain Spirit Limited | Administrative & support | 2000 |
| Mountain Sushi Ltd | Hospitality | 2026 |
| Mountain Way Pictures Limited | Information & communication | 2018 |
| Mounthill Leisure Limited | Hospitality | 2023 |
| Moura Group Ltd | Wholesale & retail | 2025 |
| Moura Motors Ltd | Wholesale & retail | 2023 |
| Mouse Deer Films Ltd | Information & communication | 2024 |
| Move and Soothe Wellness CIC | Other services | 2024 |
| Move Easy Treatment Rooms Ltd | Real estate | 2026 |
| Move Free CIC | Arts & recreation | 2023 |
| Move on Removals and Storage Ltd | Households | 2020 |
| Moveme Ltd | Transport & logistics | 2022 |
| Moven Limited | Real estate | 2023 |
| Moventi Ltd | Wholesale & retail | 2017 |
| Moving Experience Ltd | Financial services | 2007 |
| Moving Made Simple Ltd | Real estate | 2026 |
| Moving on Properties Ltd | Real estate | 2024 |
| Moving Picture Hire Ltd | Administrative & support | 2010 |
| Mowbray Court (Exeter) RTM Company Limited | Households | 2010 |
| Mowiastro Investments Limited | Real estate | 2023 |
| Moxie Security Ltd | Administrative & support | 2022 |
| Moxim Holdings Limited | Information & communication | 2024 |
| MOY Vets Limited | Extraterritorial | 2007 |
| Moya London Ltd | Wholesale & retail | 2021 |
| Moyse Foods Ltd | Agriculture & fishing | 2026 |
| MP Alpha Holdings Limited | Professional & scientific | 2021 |
| MP Communications UK Limited | Professional & scientific | 2008 |
| MP Estate Planning (UK) Ltd | Professional & scientific | 2023 |
| MP Plumbing Services Limited | Construction | 2019 |
| Mp's Hairdressing Limited | Health & social care | 2015 |
| MP81 Group Ltd | Transport & logistics | 2026 |
| Mpbtrade Ltd | Wholesale & retail | 2018 |
| MPF Trading Company Ltd | Professional & scientific | 2020 |
| MPG Stonemasons Ltd | Construction | 2022 |
| MPH Merchant (Home Counties) Limited | Wholesale & retail | 2008 |
| MPH Merchant (London) Limited | Wholesale & retail | 2008 |
| MPH Merchant (North East) Limited | Wholesale & retail | 2008 |
| MPH Merchant (North West) Limited | Wholesale & retail | 2008 |
| MPH Merchant (South Coast) Limited | Wholesale & retail | 2008 |
| MPH Merchant (South East) Limited | Wholesale & retail | 2008 |
| MPH Merchant (South West) Limited | Wholesale & retail | 2008 |
| MPH Merchant (Southern) Limited | Wholesale & retail | 2008 |
| MPH Merchant (Wessex) Limited | Wholesale & retail | 2008 |
| MPH Merchant (West Midlands) Limited | Wholesale & retail | 2008 |
| MPH Merchant Limited | Wholesale & retail | 2008 |
| MPI (Bristol) Ltd | Real estate | 2021 |
| MPI Studios Limited | Professional & scientific | 2018 |
| Mpii Ltd | Real estate | 2022 |
| Mpire Business Center Ltd | Other services | 2025 |
| Mpire Business Club Ltd | Other services | 2025 |
| Mpire Catering Ltd | Other services | 2025 |
| Mpire Seminars Ltd | Other services | 2025 |
| Mpixel Limited | Information & communication | 2016 |
| MPJ Fencing & Landscaping Ltd | Administrative & support | 2021 |
| MPK Conversions and Construction Limited | Construction | 2005 |
| MPL Chartered Project Managers & Building Consultants Ltd | Professional & scientific | 2025 |
| MPL Loft Conversions Ltd | Construction | 2021 |
| MPN Music Ltd | Arts & recreation | 2015 |