| Moses Gate Shop Ltd | Wholesale & retail | 2026 |
| Mosh Real Estate Limited | Real estate | 2021 |
| Moss Bank House Management Company Limited | Households | 1993 |
| Moss Building & Maintenance Contractors Ltd | Construction | 2019 |
| Moss Drainage Ltd | Professional & scientific | 2024 |
| Moss Hall Farm Cattery Ltd | Other services | 2019 |
| Moss Hall Farm Management Company Limited | Households | 2005 |
| MOT & Tyre Ltd | Wholesale & retail | 2025 |
| MOT Staffing Solutions Limited | Wholesale & retail | 2025 |
| Mother & Moon CIC | Health & social care | 2026 |
| Mother and Nature Limited | Wholesale & retail | 2015 |
| Mother Hubbards (Preston) Ltd | Hospitality | 2023 |
| Mother's Curry House Ltd | Hospitality | 2024 |
| Motion Assist Ltd | Other services | 2010 |
| Motionly Ltd | Information & communication | 2008 |
| Motla Construction Group Ltd | Construction | 2023 |
| Motla Property Development Group Ltd | Construction | 2026 |
| Moto Centre Limited | Wholesale & retail | 2010 |
| Motor DEN Ltd | Wholesale & retail | 2025 |
| Motor Traders Online Limited | Wholesale & retail | 2025 |
| Motorcor Preston Ltd | Other services | 2017 |
| Motorjoy Limited | Wholesale & retail | 2018 |
| Mott & Mott Limited | Real estate | 2019 |
| Mould Tool Repairs Ltd | Construction | 2026 |
| Mould Tool Welding Services Ltd | Construction | 2017 |
| Mount Canyon Ltd | Real estate | 2020 |
| Mount Engraving Company Limited | Manufacturing | 1981 |
| Mount House School (Holdings) Limited | Education | 2015 |
| Mount House School Limited | Education | 2017 |
| Mountcliffe Ltd | Real estate | 2007 |
| Mountport Holdings Limited | Financial services | 2025 |
| Mousybusiness Limited | Information & communication | 2021 |
| Mouths ROW Property Limited | Real estate | 2017 |
| Movement Presentations Limited | Professional & scientific | 1984 |
| Movementislife Limited | Professional & scientific | 2019 |
| Movetech UK Limited | Professional & scientific | 1984 |
| Moxifit Limited | Wholesale & retail | 2024 |
| Moxon Global Investments Limited | Administrative & support | 2010 |
| Moxruby Ltd | Real estate | 2018 |
| Moyovans Ltd | Transport & logistics | 2022 |
| Mozi Productions Limited | Other services | 2023 |
| Mozo Media Limited | Wholesale & retail | 2008 |
| MP Archways Ltd | Real estate | 2025 |
| MP Consultants Limited | Professional & scientific | 2024 |
| MP Optical Group Limited | Health & social care | 2021 |
| MP Optical Ltd | Wholesale & retail | 2021 |
| MP Pharma Limited | Health & social care | 2014 |
| MP Reqs Ltd | Administrative & support | 2019 |
| MP Transport Services Limited | Transport & logistics | 2018 |
| Mpaba Limited | Health & social care | 2013 |
| MPB Flooring Limited | Construction | 2025 |
| MPC Plumbing Solutions Ltd | Construction | 2022 |
| Mpcg HR & Recruitment Limited | Administrative & support | 2014 |
| MPH Consultancy Services Ltd | Professional & scientific | 2024 |
| MPH Holidays Ltd | Hospitality | 2024 |
| MPH Mortgage & Protection Ltd | Financial services | 2020 |
| MPH Professional Services Ltd | Other services | 2026 |
| MPH Property Development Ltd | Real estate | 2024 |
| MPI Property Management Services Ltd | Households | 2020 |
| MPJ Fish Supplies Limited | Wholesale & retail | 2023 |
| MPJ Recruitment Ltd | Administrative & support | 2022 |
| Mplbeauty Ltd | Other services | 2020 |
| Mpp&A Services Limited | Health & social care | 2017 |
| MPS Automotive Ltd | Wholesale & retail | 2020 |
| MPS Software Limited | Information & communication | 2019 |
| Mpse Instinct Ltd | Manufacturing | 2013 |
| MPW Transport Limited | Transport & logistics | 2021 |
| Mpwarehouse Limited | Wholesale & retail | 2018 |
| MQL NW Ltd | Other services | 2014 |
| MQM Holdings Ltd | Wholesale & retail | 2026 |
| MQS Services Limited | Construction | 2008 |
| MR B.Bolton Ltd | Hospitality | 2024 |
| MR Barbeque Limited | Hospitality | 2022 |
| MR BBQ Limited | Hospitality | 2024 |
| MR Builder 786 Ltd | Construction | 2022 |
| MR Chips Horwich Limited | Hospitality | 2013 |
| MR Claus Ltd | Construction | 2018 |
| MR Construction Services Ltd | Construction | 2019 |
| MR Cool Air-Conditioning and Refrigeration Specialists Ltd | Professional & scientific | 2021 |
| MR Dads Heating Services Limited | Construction | 2022 |
| MR Dads Property Maintenance Limited | Construction | 2014 |
| MR Diagnostic Limited | Wholesale & retail | 2022 |
| MR Engineering Services Ltd | Professional & scientific | 2025 |
| MR Fries Bolton Ltd | Hospitality | 2024 |
| MR Halal Meat UK Limited | Wholesale & retail | 2022 |
| MR Humphrey’S Ltd. | Wholesale & retail | 2019 |
| MR Muck's Garden Supplies Ltd | Administrative & support | 2009 |
| MR PHO Bolton Ltd | Hospitality | 2025 |
| MR PHO Ltd | Hospitality | 2024 |
| MR P’Z Limited | Hospitality | 2024 |
| MR R S Bale Ltd | Health & social care | 2010 |
| MR Shadab Ltd | Wholesale & retail | 2025 |
| MR Shines Mobile Valeting Services Ltd | Wholesale & retail | 2022 |
| MR T Chippy & Fast Food Limited | Hospitality | 2024 |
| MR Tech FIX Ltd | Wholesale & retail | 2023 |
| MR Tyres Bolton Ltd | Wholesale & retail | 2021 |
| MRA Couriers Limited | Administrative & support | 2017 |
| MRA Motors Limited | Wholesale & retail | 2026 |
| MRF Investments Ltd | Real estate | 2021 |
| MRG1061 Limited | Professional & scientific | 2019 |