| Mita Investments Ltd | Real estate | 2023 |
| Mitchell and Norris Property Solutions Ltd | Real estate | 2019 |
| Mitchell Lucas Associates Limited | Real estate | 2024 |
| Mitchell Property Lettings Ltd | Real estate | 2024 |
| Mitchell Wilde LLP | | 2005 |
| Mitchell Yacht Solutions Ltd | Transport & logistics | 2025 |
| Mitchell's (Caravans) Limited | Extraterritorial | 1949 |
| Mitchell's Supermarket Ltd | Wholesale & retail | 2025 |
| Mitroi Limited | Transport & logistics | 2013 |
| Mittonoak Limited | Real estate | 1993 |
| Mittro Limited | Administrative & support | 2014 |
| Mityo Mitev Ltd | Transport & logistics | 2011 |
| Miuayga Ltd | Wholesale & retail | 2017 |
| MIX Motors Ltd | Wholesale & retail | 2019 |
| Mixed Foundations | Other services | 2014 |
| Mixed Foundations Holistic Homes Ltd | Health & social care | 2019 |
| Mixxd Ltd | Information & communication | 2025 |
| MIY Limited | Wholesale & retail | 2020 |
| Miyansco Personnel and Logistics Services Ltd | Information & communication | 2023 |
| Mizar Telecommunications Ltd | Information & communication | 2020 |
| Mizu RG Ltd | Hospitality | 2025 |
| MJ Beresford & SON Building Contractors Limited | Construction | 2026 |
| MJ Bespoke Building Service Ltd | Construction | 2024 |
| MJ Care Limited | Health & social care | 2014 |
| MJ Cribs Ltd | Real estate | 2019 |
| MJ Engineering (Newark) Ltd | Manufacturing | 2011 |
| MJ Newsletter Ltd | Professional & scientific | 2025 |
| MJ Prop & Investment Limited | Real estate | 2023 |
| MJ Publishing Ltd | Information & communication | 2021 |
| MJ Solutions Air Conditioning and Heat Pumps Ltd | Energy | 2015 |
| MJ Spaces Ltd | Real estate | 2025 |
| MJ Strategies Limited | Real estate | 2015 |
| MJ Therapy Ltd | Health & social care | 2020 |
| MJ ZOE Ltd | Health & social care | 2012 |
| Mj&Kaz Trading Limited | Wholesale & retail | 2025 |
| MJ-4U Ltd | Wholesale & retail | 2024 |
| MJA Accountancy Services Limited | Professional & scientific | 2014 |
| Mjaj Ltd | Wholesale & retail | 2019 |
| Mjak Resourcing Ltd | Information & communication | 2016 |
| Mjay’S Barbershop Ltd | Other services | 2025 |
| MJB Civils Limited | Construction | 2014 |
| MJC Electrical Ltd | Construction | 2004 |
| MJC Law Limited | Professional & scientific | 2017 |
| MJC Management Services Limited | Professional & scientific | 2020 |
| MJD Housing Services Ltd | Real estate | 2025 |
| MJD Midlands Limited | Real estate | 2025 |
| MJD Nest Ltd | Real estate | 2026 |
| MJE Projects Limited | Administrative & support | 2010 |
| MJE Ventures Limited | Professional & scientific | 2026 |
| MJG Property Solutions Ltd | Construction | 2023 |
| MJH Generator Winding Repairs Limited | Manufacturing | 2018 |
| MJH Surgical Limited | Health & social care | 2014 |
| Mjhretail Ltd | Wholesale & retail | 2025 |
| MJK Traders Ltd | Wholesale & retail | 2024 |
| MJL Ventures Ltd | Real estate | 2024 |
| Mjlt Media Ltd | Information & communication | 2026 |
| MJM Property & Investments Limited | Real estate | 2023 |
| MJM Trade Ltd | Construction | 2026 |
| MJM Transform Ltd | Professional & scientific | 2024 |
| Mjmj Ltd | Administrative & support | 2016 |
| MJN Developers Ltd | Real estate | 2023 |
| MJN Plant & Machinery Ltd | Administrative & support | 2011 |
| Mjpassistance Ltd | Health & social care | 2024 |
| MJS Fibre & Data Installations Limited | Information & communication | 2005 |
| Mjs.Ac Ltd | Construction | 2021 |
| Mjstaples Ltd | Construction | 2020 |
| MJW Scaffolding Ltd | Construction | 2014 |
| Mjwhyman Ltd | Real estate | 2020 |
| MK Bookkeeping Limited | Professional & scientific | 2017 |
| MK Builders (Midlands) Ltd | Construction | 2020 |
| MK Coding Ltd | Information & communication | 2025 |
| MK Commercial Consultancy Limited | Professional & scientific | 2017 |
| MK Consultants Limited | Professional & scientific | 2016 |
| MK Cycle Repairs Ltd | Wholesale & retail | 2026 |
| MK Developments (Midlands) Limited | Construction | 2024 |
| MK Electrical Installation & Control Ltd | Construction | 2012 |
| MK Electrical Services Limited | Energy | 2015 |
| MK Feast Limited Limited | Hospitality | 2025 |
| MK Financial Consultancy Limited | Professional & scientific | 2022 |
| MK Flavour Limited | Hospitality | 2026 |
| MK Food Store (Nottingham) Ltd | Wholesale & retail | 2024 |
| MK Holdings (Nottm) Ltd | Financial services | 2020 |
| MK Japan Cars Ltd | Wholesale & retail | 2023 |
| MK Legal Consultants Ltd | Financial services | 2025 |
| MK Medical Specialists Limited | Health & social care | 2013 |
| MK Mentoring & Training Ltd | Other services | 2025 |
| MK Nott Limited | Hospitality | 2025 |
| MK Property (Nottm) Ltd | Real estate | 2020 |
| MK PTY Ltd | Wholesale & retail | 2022 |
| MK Purple Estates Ltd | Real estate | 2025 |
| MK Quality Services Ltd | Professional & scientific | 2017 |
| MK Redevelopments Ltd | Construction | 2024 |
| MK Studio Nottingham Ltd | Other services | 2021 |
| MK Trans Express Ltd | Transport & logistics | 2025 |
| MK Vehicle Services Limited | Transport & logistics | 2018 |
| MK Yummy Limited | Hospitality | 2025 |
| MK1 Display Solutions Limited | Wholesale & retail | 2009 |
| MK1 Welding Services Ltd | Manufacturing | 2019 |
| MKA Builders (Nottingham) Ltd | Construction | 2023 |
| MKA Care Services Ltd | Health & social care | 2025 |