| Local Letting Limited | Real estate | 2001 |
| Loco Vuelo Limited | Wholesale & retail | 2012 |
| London and Midland Group Limited | Construction | 2024 |
| Lone Wolf Creative Ltd | Administrative & support | 2018 |
| Loqia Ltd | Information & communication | 2024 |
| Love Pompette Limited | Wholesale & retail | 2026 |
| Lower Farm Associates Ltd | Households | 2023 |
| Lowherty Bars Ltd | Administrative & support | 2026 |
| Lucent Homes Ltd | Real estate | 2025 |
| M & B Market Promotions | | 1997 |
| M&A Technical Ltd | Professional & scientific | 2026 |
| M&G Delivery Solution Ltd | Transport & logistics | 2022 |
| M.A G Barber Ltd | Other services | 2026 |
| M.J. Carter Associates Limited | Professional & scientific | 1983 |
| Mahadev Propco Ltd | Real estate | 2026 |
| Maid of the Mill Ltd | Hospitality | 2021 |
| Majestic Splendour Limited | Other services | 2014 |
| Major Gardening & Decorating Services Limited | Administrative & support | 2022 |
| Make IT Special Events Ltd | Arts & recreation | 2021 |
| Mamba Negra Art & Tattoo Limited | Arts & recreation | 2021 |
| Manor Road (Atherstone) Management Company Limited | Construction | 2007 |
| Manor Tree Care Limited | Administrative & support | 2013 |
| Mansell Motorsport Limited | Arts & recreation | 2009 |
| Maple Motor Company Ltd | Wholesale & retail | 2019 |
| Mark Archer Limited | Manufacturing | 2026 |
| Mark Webster & Co - Lettings Limited | Real estate | 2008 |
| Mark Webster & Co-Residential Limited | Real estate | 2007 |
| Market Information Services Limited | Professional & scientific | 2012 |
| Marshall Egerton Limited | Manufacturing | 2018 |
| Martin Butler Limited | Real estate | 2016 |
| Martin James Associates Limited | Financial services | 2003 |
| Martina Orchard Ltd | Hospitality | 2023 |
| Maruleaf Ltd | Wholesale & retail | 2024 |
| Marys Cupcakes Limited | Wholesale & retail | 2023 |
| MAS Precision Engineering Holdings Limited | Financial services | 2025 |
| MAS Precision Engineering Limited | Manufacturing | 2010 |
| Masterfit Contractors Ltd | Construction | 2025 |
| Masterfit Roofing & Building Ltd | Construction | 2023 |
| Matt's Transport Ltd | Transport & logistics | 2019 |
| Maxie Earle Ltd | Professional & scientific | 2024 |
| Mayville Cleaning Services Ltd | Administrative & support | 2022 |
| Mcgreal & Gibson Ltd | Wholesale & retail | 2020 |
| Medi PIX Ltd | Wholesale & retail | 2023 |
| Mercia Ventures Limited | Real estate | 2019 |
| Meredith Historic Motorsport Limited | Wholesale & retail | 2024 |
| Merevale House Limited | Health & social care | 2022 |
| Meriden Environmental Limited | Professional & scientific | 2024 |
| Merlin Leisure and Hospitality Ltd | Real estate | 2025 |
| Merrivale (Austrey) Management Company Limited | Households | 2017 |
| MG Event & Sound Ltd | Professional & scientific | 2016 |
| MGA Property Holdings Ltd | Real estate | 2024 |
| Mhan Solutions Limited | Manufacturing | 2025 |
| Microfilm Shop Limited(The) | Extraterritorial | 1985 |
| Midland Chemicals Limited | Manufacturing | 1991 |
| Midland Energy Group Ltd | Construction | 2025 |
| Midlands Infrastructure Services Ltd. | Professional & scientific | 2003 |
| Midlands Removals Ltd | Transport & logistics | 2018 |
| Midlands Renovations Ltd | Construction | 2025 |
| Millen Digital Solutions Ltd | Information & communication | 2025 |
| Millichamp Logistics Limited | Transport & logistics | 2002 |
| Milliners Court Management Company Limited | Other services | 1988 |
| Miriam Clrb Transport Limited | Transport & logistics | 2018 |
| Misa Consultancy Limited | Professional & scientific | 2026 |
| MJH Contracts Ltd | Construction | 2015 |
| MJP Industrial Maintenance Services Ltd | Professional & scientific | 2025 |
| MK Brow Academy Ltd | Education | 2025 |
| MLK Associates Ltd | Real estate | 2019 |
| MMB Technical Building Services Ltd. | Construction | 2018 |
| MNG Trading Ltd | Hospitality | 2026 |
| Mobile Care Services Limited | Health & social care | 2002 |
| Mobilestar Limited | Administrative & support | 1978 |
| Modern Vision Furniture Limited | Construction | 2014 |
| Moore Masonry Services Limited | Construction | 2014 |
| Morris Developments 2025 UK Limited | Construction | 2025 |
| MPC Motor Company Limited | Wholesale & retail | 2023 |
| MSM (Tamworth) Limited | Information & communication | 1997 |
| Mssp Group Ltd | Information & communication | 2025 |
| Munchables Limited | Manufacturing | 2022 |
| Murrell Commercial Services Ltd | Professional & scientific | 2022 |
| Murrow Construction Ltd | Construction | 2021 |
| Mythe Barn Limited | Real estate | 2011 |
| Mythe Bridge Farm Management Company Ltd | Construction | 2020 |
| Mythe Farm Limited | Agriculture & fishing | 1977 |
| Mythe Services Ltd | Professional & scientific | 2021 |
| N J Percival Ltd | Manufacturing | 2026 |
| N.N.A.A Enterprise Ltd | Hospitality | 2025 |
| Nanko Trans Limited | Transport & logistics | 2017 |
| NB Electrician Ltd | Construction | 2024 |
| Ndnt Healthcare Ltd | Health & social care | 2023 |
| Nemo (1991) Limited | Wholesale & retail | 1986 |
| Nemo Group Holdings Limited | Real estate | 2023 |
| NES Recycling Limited | Water & waste | 2007 |
| New Dawn Media Ltd | Information & communication | 2011 |
| New Images Atherstone Ltd | Other services | 2020 |
| New Images Rentals Ltd | Other services | 2024 |
| Nick Perry Fork Lift Training Services Ltd | Education | 2011 |
| Nick the Fish MAN Ltd | Wholesale & retail | 2018 |
| Nick Trans Limited | Transport & logistics | 2008 |
| Nicolas Adam Ltd | Other services | 2011 |
| Nimblefish Consultancy Limited | Professional & scientific | 2006 |