| Mind Matters More Limited | Health & social care | 2019 |
| Mind Mingle MK Limited | Education | 2024 |
| Mind Over Matter Consultancy Limited | Professional & scientific | 2013 |
| Mindas GAS Services Ltd | Construction | 2026 |
| Mindas Heating Ltd | Construction | 2015 |
| Mindful Gardens Ltd | Administrative & support | 2025 |
| Mindful Health Matters Limited | Health & social care | 2022 |
| Mindgate Solutions (UK) Limited | Information & communication | 2024 |
| Mindmap Technology Limited | Information & communication | 2015 |
| Mindseed Innovations Ltd | Education | 2024 |
| Mindshop UK Limited | Professional & scientific | 1998 |
| Mindz Ltd | Health & social care | 2010 |
| Mine for NOW Ltd | Real estate | 2024 |
| Minerva Money Management Limited | Financial services | 2015 |
| Mineshaft Ltd | Real estate | 2015 |
| Ming BIN Chen Ltd. | Wholesale & retail | 2025 |
| Ming CAN OU Ltd. | Wholesale & retail | 2025 |
| Ming Jian OU Ltd. | Wholesale & retail | 2025 |
| Ming JIE OU Ltd. | Wholesale & retail | 2025 |
| Ming KE OU Ltd. | Wholesale & retail | 2025 |
| Ming XIN Media Ltd | Professional & scientific | 2025 |
| Ming Zhao Yang Ltd. | Wholesale & retail | 2025 |
| Minglobal Group Limited | Other services | 2022 |
| Mini Concepts Limited | Wholesale & retail | 2021 |
| Mini Maids Cleaning Services Ltd | Administrative & support | 2023 |
| Mini Monsters Preschool Limited | Education | 2011 |
| Minidragon Ltd | Financial services | 2026 |
| Minimal IT Limited | Information & communication | 2005 |
| Minimowl Events Ltd | Arts & recreation | 2020 |
| Minis Puds Ltd | Extraterritorial | 2023 |
| Ministerio Palavra Genuina-Christ Apostolic Church Limited | Other services | 2007 |
| Ministry of Defiance Limited | Information & communication | 2024 |
| Minja Superstore Ltd | Wholesale & retail | 2022 |
| Mink Enterprises Ltd | Information & communication | 2024 |
| Minkels UK Limited | Wholesale & retail | 2005 |
| Minster Building Company Ltd | Real estate | 2007 |
| Minster Developments Limited | Construction | 2011 |
| Mint and Lavender Limited | Professional & scientific | 2020 |
| Mint Green Sustainability Ltd | Professional & scientific | 2011 |
| Mint Impact Solutions Ltd | Wholesale & retail | 2025 |
| Mint Rewards Ltd | Professional & scientific | 2023 |
| Mint Technology South Limited | Information & communication | 2022 |
| Minted Supply Ltd | Wholesale & retail | 2026 |
| Minton Park Management Limited | Administrative & support | 1994 |
| Mints London Ltd | Real estate | 2021 |
| Mintworks Agency Ltd | Professional & scientific | 2023 |
| Miqua Developments Ltd | Real estate | 2017 |
| Mira Horizon Ltd | Real estate | 2026 |
| Mirai Consultancy Limited | Administrative & support | 2013 |
| Miraj Empire Limited | Arts & recreation | 2022 |
| Miraj Trading Ltd | Wholesale & retail | 2018 |
| Miralpha Limited | Wholesale & retail | 2009 |
| Miranda Business and Commercial Capital Solutions Limited | Financial services | 2024 |
| Miranda Property Group Limited | Real estate | 2024 |
| Mireka Ltd | Real estate | 2025 |
| Miria Internatioal Services Ltd | Health & social care | 2023 |
| Mirjanja Ltd | Real estate | 2021 |
| Mirka (UK) Ltd | Wholesale & retail | 1979 |
| Miroszewski Transport Ltd | Transport & logistics | 2018 |
| Mirror Eyes Ltd | Health & social care | 2022 |
| Mirror Mechanics Limited | Information & communication | 2025 |
| Mirza (UK) Limited | Wholesale & retail | 1993 |
| MIS Consulting Services Ltd | Professional & scientific | 2022 |
| Misbah Enterprises Ltd | Hospitality | 2020 |
| Mishi’S Munchies Limited | Hospitality | 2024 |
| Misoji Limited | Wholesale & retail | 2018 |
| Miss AI Ltd | Information & communication | 2025 |
| Miss Havisham's Tea Shop Limited | Hospitality | 2015 |
| Miss Lillies Ltd | Wholesale & retail | 2020 |
| Mission Education Ltd | Education | 2025 |
| Mission India | Other services | 1998 |
| Mission Property Ltd | Real estate | 2018 |
| Mister Nice Lease Limited | Financial services | 2021 |
| Misthos Ltd. | Information & communication | 2005 |
| Mistmanor Developments Limited | Real estate | 1992 |
| Mistra Management Ltd | Administrative & support | 2024 |
| Mistry Clinical Ltd | Administrative & support | 2018 |
| Mistry Optics Ltd | Health & social care | 2023 |
| Mistry Professional Services Ltd | Professional & scientific | 2017 |
| Mistymeadowscare Ltd | Health & social care | 2026 |
| Mitcham Logistics Ltd | Transport & logistics | 2021 |
| Mitchell & Wright Consulting Limited | Information & communication | 2022 |
| Mitchell Brook Gardens NO. 2 Residents Company Limited | Households | 1989 |
| Mitchell Brook Gardens NO.4 Residents Company Limited | Households | 1994 |
| Mitchell Contracting Services Ltd | Construction | 2025 |
| Mitchell Ryan Ltd | Wholesale & retail | 2015 |
| Mitdoc 1 Limited | Financial services | 2024 |
| Mith Management Ltd | Real estate | 2026 |
| Mith Properties Ltd | Real estate | 2019 |
| Mito Business Limited | Construction | 2022 |
| Mitr Globally UK Limited | Professional & scientific | 2025 |
| Mitre Oak Limited | Manufacturing | 2005 |
| Mitrea Ltd | Information & communication | 2023 |
| Mitrena Limited | Information & communication | 2018 |
| Mitrita Transport Ltd | Transport & logistics | 2025 |
| Mitsubishi Pencil Co. U.K. Ltd. | Wholesale & retail | 1984 |
| Mitsubridge Global Ltd | Professional & scientific | 2025 |
| Mitten & Moon Education Ltd | Education | 2026 |
| MIU Muse Music Ltd. | Information & communication | 2025 |
| MIV Construction Ltd | Construction | 2020 |