| M & R Plumbing & Heating Ltd | Manufacturing | 2005 |
| M & S (Fitton Hill) Ltd | Wholesale & retail | 2017 |
| M & S Bedrooms Ltd | Manufacturing | 2013 |
| M & S Sprinklers Limited | Manufacturing | 2016 |
| M & W Property Ltd | Real estate | 2015 |
| M a Anderton Limited | Construction | 2011 |
| M a Porter Ltd | Construction | 2004 |
| M a S Couriers Ltd | Transport & logistics | 2023 |
| M a S Store Limited | Wholesale & retail | 2018 |
| M Afar Ltd | Wholesale & retail | 2025 |
| M and K Consulting Services Ltd | Information & communication | 2025 |
| M and KP Investments Ltd | Wholesale & retail | 2019 |
| M and M Couriers Service Ltd | Transport & logistics | 2026 |
| M and M Dental Ltd | Health & social care | 2024 |
| M Ashton Ltd | Transport & logistics | 2016 |
| M B Akhtar Holdings Ltd | Real estate | 2017 |
| M B Contracting Services Ltd | Transport & logistics | 2024 |
| M B Electrical (Bolton) Limited | Construction | 2013 |
| M C a (Bolton) Limited | Financial services | 2002 |
| M C E Builders Ltd | Construction | 2022 |
| M C North Limited | Hospitality | 2025 |
| M Chhipa Limited | Health & social care | 2016 |
| M D E Fitness Solutions Limited | Wholesale & retail | 2016 |
| M Dawson Electrical Services Ltd | Construction | 2019 |
| M Devine Garden Services Limited | Administrative & support | 2018 |
| M Di-Rupo Limited | Professional & scientific | 2020 |
| M Fernandes Designs Ltd | Construction | 2025 |
| M G Driveways Ltd | Construction | 2025 |
| M G Electrical Services (Bolton) Limited | Construction | 2005 |
| M Gill Limited | Administrative & support | 2016 |
| M H Adam Ltd | Transport & logistics | 2025 |
| M Halal Meat UK Ltd | Wholesale & retail | 2018 |
| M I Atcha Limited | Professional & scientific | 2025 |
| M J Buckingham Investments Ltd | Other services | 2024 |
| M J Clothing Limited | Wholesale & retail | 2012 |
| M J Evro Ltd | Real estate | 2024 |
| M J Louram Transport (UK) Ltd | Transport & logistics | 2025 |
| M J MAY Estates Limited | Households | 2024 |
| M J MAY Transport Limited | Transport & logistics | 2013 |
| M Jennings Homes Ltd | Construction | 2019 |
| M K Estates (Midlands) Ltd | Real estate | 2015 |
| M K Fazal Ltd | Health & social care | 2021 |
| M K Plumbing Ltd | Construction | 2011 |
| M Kernaoui Ltd | Other services | 2019 |
| M Kerry Property Ltd | Real estate | 2023 |
| M Khan & Sons Ltd | Wholesale & retail | 2020 |
| M Lamont Holdings Limited | Financial services | 2025 |
| M Lamont Ltd | Information & communication | 2024 |
| M Lamont Properties Limited | Real estate | 2025 |
| M Mackay Ltd | Hospitality | 2023 |
| M Media Ltd | Professional & scientific | 2025 |
| M Muhib Signature Ltd | Professional & scientific | 2025 |
| M Munshi Limited | Health & social care | 2014 |
| M N Eyecare Ltd | Health & social care | 2019 |
| M Nasir Consultancy Ltd | Professional & scientific | 2012 |
| M Nazir Goods Ltd | Wholesale & retail | 2023 |
| M Patel Ltd | Wholesale & retail | 2023 |
| M Patel Optical Ltd | Health & social care | 2022 |
| M Patel Optics Ltd | Health & social care | 2024 |
| M RAI Holdings Ltd | Financial services | 2017 |
| M Rashey Logistics Limited | Transport & logistics | 2022 |
| M S Business Holdings Limited | Financial services | 2024 |
| M S Business Ventures Ltd | Real estate | 2022 |
| M S Parla Limited | Real estate | 2025 |
| M S Transport (Bolton) Limited | Transport & logistics | 1999 |
| M Smith Roofing Ltd | Construction | 2015 |
| M Squared Invest Limited | Real estate | 2021 |
| M Talati Ltd | Health & social care | 2024 |
| M Two Search Ltd | Administrative & support | 2021 |
| M U Opticals Limited | Health & social care | 2015 |
| M W S Servicing Limited | Construction | 2012 |
| M W Servicing and Repairs Limited | Wholesale & retail | 2007 |
| M Wild Utilities Limited | Construction | 2016 |
| M Williams Design Ltd | Professional & scientific | 2024 |
| M Wilson Transport Limited | Transport & logistics | 2016 |
| M&A Balint Ltd | Construction | 2025 |
| M&A Tomlin Consulting Ltd | Administrative & support | 2022 |
| M&B CARE360 Ltd | Administrative & support | 2026 |
| M&F Advisory Ltd | Information & communication | 2019 |
| M&G Inc Ltd | Hospitality | 2022 |
| M&H Assets Ltd | Real estate | 2024 |
| M&H Clothing Ltd | Wholesale & retail | 2020 |
| M&H Fuel Services Ltd | Wholesale & retail | 2020 |
| M&H Legal Consultants Limited | Other services | 2024 |
| M&H TEK Ltd | Administrative & support | 2021 |
| M&J Stevenson Holdings Limited | Financial services | 2026 |
| M&K Digital Limited | Wholesale & retail | 2020 |
| M&L Digital Limited | Information & communication | 2022 |
| M&M Assist Ltd | Transport & logistics | 2024 |
| M&M Bargains Limited | Wholesale & retail | 2022 |
| M&M Enterprises NW Limited | Professional & scientific | 2026 |
| M&M GAS Ltd | Construction | 2021 |
| M&M Goods Ltd | Wholesale & retail | 2025 |
| M&M Group Ltd | Real estate | 2021 |
| M&M Motors Manchester Ltd | Wholesale & retail | 2018 |
| M&M Prestige Autos Ltd | Wholesale & retail | 2025 |
| M&M Properties (NW) Ltd | Real estate | 2025 |
| M&M Signature Ltd | Wholesale & retail | 2026 |
| M&M Ventureprise Ltd | Wholesale & retail | 2021 |
| M&N Logic Ltd | Health & social care | 2022 |