| Mahr Impex UK Ltd | Manufacturing | 2005 |
| Mahz UK Ltd | Professional & scientific | 2024 |
| MAI Health Ltd | Health & social care | 2019 |
| Maidmar Limited | Administrative & support | 2014 |
| MAIDZ2CLEAN Ltd | Administrative & support | 2025 |
| Mailway Displays Limited | Administrative & support | 2023 |
| Mailway Packaging Solutions Group Limited | Administrative & support | 2018 |
| Mailway Packaging Solutions Limited | Manufacturing | 2010 |
| Maimoonah Fiaz Ltd | Health & social care | 2019 |
| Mainlift Limited | Construction | 1988 |
| Mainstay Properties Ltd | Households | 2022 |
| Maintain 365 Limited | Construction | 2024 |
| Maira Properties Limited | Households | 2024 |
| Maisa Properties Limited | Real estate | 2017 |
| Maison DE Nails Ltd | Other services | 2025 |
| Maison Nura Ltd | Health & social care | 2026 |
| Maison Threads Suppliers Ltd | Wholesale & retail | 2023 |
| Maizee Solution Limited | Construction | 2025 |
| Maizgram Ltd | Real estate | 2019 |
| Maja Sklep Ltd | Wholesale & retail | 2015 |
| Majestic Industries Ltd | Wholesale & retail | 2016 |
| Majestic Meat Holdings Ltd | Manufacturing | 2019 |
| Majestic Meat Ltd | Manufacturing | 2013 |
| Majestic Properties & Lettings Ltd | Real estate | 2024 |
| Majestic View Property Limited | Real estate | 2024 |
| Majid ALI Ltd | Transport & logistics | 2019 |
| MAJTRADERS80 Ltd | Transport & logistics | 2025 |
| MAK & a Ltd | Wholesale & retail | 2025 |
| MAK Accountants & Tax Limited | Professional & scientific | 2021 |
| MAK Care Services Ltd | Health & social care | 2024 |
| MAK Coding Ltd | Wholesale & retail | 2023 |
| MAK Digital Community Interest Company | Information & communication | 2004 |
| MAK Forecourts Ltd | Wholesale & retail | 2026 |
| MAK Intl Services Ltd | Information & communication | 2025 |
| MAK Managemnt Ltd | Households | 2025 |
| MAK Payroll Ltd | Administrative & support | 2020 |
| MAK Professional Services Ltd | Information & communication | 2026 |
| MAK Supliers Ltd | Wholesale & retail | 2025 |
| MAK Sweets Limited | Manufacturing | 2025 |
| Makain Ltd | Construction | 2014 |
| Makclean Services Ltd | Administrative & support | 2020 |
| Make App Ltd | Other services | 2023 |
| Make ME Beautiful Ltd | Other services | 2024 |
| Make the Change 365 Ltd | Information & communication | 2024 |
| Makeability Limited | Professional & scientific | 2024 |
| Makeup by Anisha Ltd | Other services | 2017 |
| Makeup by Nisha C Ltd | Education | 2021 |
| Makhen Solutions Ltd | Administrative & support | 2026 |
| Makin Dixon Solicitors Limited | Professional & scientific | 2014 |
| Making Plans Limited | Information & communication | 1995 |
| Makkah Travel (BFD) Ltd | Administrative & support | 2023 |
| Makki & Madani Travel Limited | Administrative & support | 2002 |
| Makm Construction Ltd | Manufacturing | 2025 |
| Maks NO Bull Recovery Limited | Wholesale & retail | 2025 |
| Maksud Limited | Information & communication | 2025 |
| Malaika Care Solutions CIC | Health & social care | 2025 |
| Malakand Floorings Ltd | Wholesale & retail | 2023 |
| Malala Properties Ltd | Financial services | 2025 |
| Malayel Ltd | Wholesale & retail | 2026 |
| Malayikah Ltd | Professional & scientific | 2016 |
| Malcolm Bright & SON (Haulage & Distribution) Limited | Transport & logistics | 2012 |
| Malcomms Limited | Construction | 2016 |
| Malik & SAA Ltd | Hospitality | 2024 |
| Malik AM Locum Limited | Health & social care | 2020 |
| Malik Construction Services Bradford Ltd | Construction | 2025 |
| Malik Enterprises Bradford Ltd | Real estate | 2026 |
| Malik Group Holdings Ltd | Real estate | 2022 |
| Malik Halls 2 Ltd | Real estate | 2007 |
| Malik Halls Limited | Real estate | 2007 |
| Malik House Ltd | Real estate | 2007 |
| Malik IT Support Ltd | Other services | 2019 |
| Malik Property Partners Ltd | Real estate | 2025 |
| Malik Real Estate Limited | Real estate | 2006 |
| Malik's Kitchen Limited | Manufacturing | 2022 |
| Malikutz Ltd | Other services | 2025 |
| Malikx Sofa Ltd | Wholesale & retail | 2025 |
| Malinga Healthcare Services Ltd | Health & social care | 2014 |
| Malones Spice Ltd | Hospitality | 2020 |
| Malones Wibsey Limited | Hospitality | 2023 |
| Maltby Spice Lounge Restaurant Ltd | Hospitality | 2023 |
| MAM Core Investments Ltd | Health & social care | 2026 |
| MAM Locum Ltd | Wholesale & retail | 2025 |
| Mama Africa Food Store Ltd | Wholesale & retail | 2026 |
| Mama Hoodoo Limited | Arts & recreation | 2021 |
| Mambavape Ltd | Wholesale & retail | 2023 |
| Mambo Tanz Ltd | Other services | 2023 |
| Mambo Wine and Dine Ltd | Hospitality | 2021 |
| Mamin Healthcare Limited | Health & social care | 2016 |
| Mamoon Optical Ltd | Health & social care | 2026 |
| Mamselle Limited | Wholesale & retail | 2017 |
| Management Support & Development Limited | Professional & scientific | 2022 |
| Managing 2 Succeed Limited | Professional & scientific | 2012 |
| Manal Ltd. | Real estate | 2006 |
| Mancero Services Ltd | Information & communication | 2023 |
| Manchester Bolt & NUT Company Limited | Wholesale & retail | 1974 |
| Manchester Cakes and Shakes Limited | Hospitality | 2018 |
| Manchester Ceramics Tiling Limited | Construction | 2024 |
| Manchester Road Barbers Ltd | Other services | 2025 |
| Manchester Road DIY Ltd | Wholesale & retail | 2025 |
| Manchester Taxi Group Limited | Information & communication | 2023 |