| Minparo Logistics Ltd | Wholesale & retail | 2025 |
| Mins Holdings Limited | Real estate | 1962 |
| Minsterhouse Ltd | Real estate | 2024 |
| Mintridge Management Services Ltd | Administrative & support | 2012 |
| Minty Fresh Cleaners Ltd | Administrative & support | 2026 |
| Minuet Paddocks Management Limited | Real estate | 2019 |
| Minuet Village Limited | Real estate | 2017 |
| Minuet Village Management Limited | Households | 2023 |
| Miracle's Properties Limited | Real estate | 2024 |
| Mirage Enterprise Holdings Ltd | Real estate | 2025 |
| Mirage Wedding Services Ltd | Manufacturing | 2015 |
| Mirak Logistics Ltd | Administrative & support | 2013 |
| Mirha Junaid Enterprises Ltd | Wholesale & retail | 2026 |
| Mirhas Choice Limited | Wholesale & retail | 2025 |
| Mirkhan Quickshop Ltd | Wholesale & retail | 2026 |
| Miron Cars Ltd | Wholesale & retail | 2025 |
| Mirror Mirror Hairdressing Limited | Other services | 2004 |
| Mirrorball Consulting Ltd | Professional & scientific | 2023 |
| Mirrorsoft Ltd | Information & communication | 2024 |
| Miruna Georgiana Ltd | Administrative & support | 2025 |
| Mirza Contractors Ltd | Construction | 2026 |
| Misa Build and Maintain Ltd | Construction | 2021 |
| Misha Health Ltd | Health & social care | 2024 |
| Miss Paradise Ltd | Other services | 2022 |
| Missingspoons Ltd | Other services | 2024 |
| Mission Associates Limited | Professional & scientific | 2025 |
| Misteria Ltd | Manufacturing | 2026 |
| Mitchell Carter & Moon Ltd | Information & communication | 2004 |
| Mitchell Cook AV Limited | Construction | 2024 |
| Mitchell Finance Limited | Real estate | 2011 |
| Mitchmac Group Limited | Wholesale & retail | 2021 |
| Miteri Travel Limited | Administrative & support | 2024 |
| Mitha Foods Limited | Hospitality | 2025 |
| MITRANS1986 Ltd | Other services | 2019 |
| Mivra Design & Strategy Limited | Information & communication | 2025 |
| Mixon Limited | Transport & logistics | 2025 |
| MJ Car Sales (Peterborough) Limited | Wholesale & retail | 2017 |
| MJ Cruz Ltd | Hospitality | 2018 |
| MJ Dream Property's Ltd | Real estate | 2024 |
| MJ Driver Ltd | Administrative & support | 2025 |
| MJ Electrical Plumbing Services Ltd | Construction | 2022 |
| MJ Oundle Ltd | Wholesale & retail | 2017 |
| MJ Precast Concrete Finishing Ltd | Construction | 2020 |
| Mjanke Transport Ltd | Transport & logistics | 2018 |
| MJB Trans Limited | Transport & logistics | 2017 |
| MJC Management Ltd | Professional & scientific | 2021 |
| MJC, Removals Ltd | Transport & logistics | 2025 |
| MJJ Maintenance Ltd | Construction | 2023 |
| MJJ Welding Limited | Construction | 2021 |
| MJM Property Maintenance Ltd | Construction | 2022 |
| MJO Transport Ltd | Transport & logistics | 2025 |
| MJS Properties (TS) Ltd | Real estate | 2024 |
| MJS Trading Limited | Wholesale & retail | 2023 |
| MK Aerobatics Ltd | Education | 2021 |
| MK Car Sales Ltd | Wholesale & retail | 2026 |
| MK Connections Ltd | Manufacturing | 2023 |
| MK Consultancy Solutions Ltd | Information & communication | 2025 |
| MK Empire Ltd | Financial services | 2026 |
| MK Haven Ltd | Hospitality | 2024 |
| MK Invest BLU Apartments LLP | | 2026 |
| MK Mario Service Ltd | Transport & logistics | 2019 |
| MK Paint Ltd | Wholesale & retail | 2016 |
| MK Waki Construction Ltd | Construction | 2026 |
| Mk&At Ltd | Wholesale & retail | 2014 |
| MK1 Consulting Limited | Administrative & support | 2024 |
| MK4ELECTRICAL Ltd | Construction | 2018 |
| MKD Networks Limited | Information & communication | 2019 |
| Mkdc Services Ltd | Water & waste | 2017 |
| Mkim Logistics Ltd | Administrative & support | 2015 |
| Mkjavell Health Ltd | Health & social care | 2022 |
| MKN Cleaner Ltd | Administrative & support | 2021 |
| MKS Customs Ltd | Wholesale & retail | 2015 |
| MKS Electrics Ltd | Construction | 2012 |
| MKS Motors Ltd | Wholesale & retail | 2024 |
| Mkturbo Ltd | Wholesale & retail | 2016 |
| MKW Group Limited | Real estate | 2020 |
| MKY Investments Ltd | Real estate | 2024 |
| MKY69 Ltd | Transport & logistics | 2024 |
| ML Binns Ltd | Health & social care | 2013 |
| MLC Legal Services Ltd | Professional & scientific | 2025 |
| MLG Warehouse Ltd | Wholesale & retail | 2024 |
| MLK Tech Consultancy Services Limited | Information & communication | 2019 |
| Mlody Trans Ltd | Transport & logistics | 2019 |
| MLP Properties Management Ltd | Real estate | 2023 |
| MLS Welding Limited | Manufacturing | 2019 |
| Mlsn Consultancy Ltd | Professional & scientific | 2024 |
| MLT Management Limited | Manufacturing | 1992 |
| MLV Encore Limited | Information & communication | 2023 |
| MM Carpenter & Joinery Ltd | Construction | 2025 |
| MM Conservatory Services Ltd | Construction | 2022 |
| MM Estates 26 Limited | Real estate | 2026 |
| MM Family Autos Limited | Wholesale & retail | 2012 |
| MM Family Properties Ltd | Construction | 2022 |
| MM Real Estate Limited | Real estate | 2021 |
| MM Sorani Logistics Ltd | Transport & logistics | 2025 |
| MMA Business Consultants Ltd | Information & communication | 2025 |
| MMA Management Limited | Hospitality | 2024 |
| Mmameen Consultancy Ltd | Information & communication | 2025 |
| Mmfi Investments Ltd | Real estate | 2023 |
| Mmfi Limited | Health & social care | 2009 |