| Little Big Crafty Co Ltd | Wholesale & retail | 2025 |
| Little Big Party Co Ltd | Wholesale & retail | 2022 |
| Little Rabbit Ltd | Hospitality | 2022 |
| Little Rascals Play Buxton Limited | Hospitality | 2014 |
| Livro Co Ltd | Hospitality | 2024 |
| LJ Ventures Ltd. | Financial services | 2018 |
| LJM Psychotherapies Ltd | Health & social care | 2023 |
| LJM Software Solutions Limited | Information & communication | 2013 |
| LL Electrical Solutions Ltd | Other services | 2024 |
| Llap Ltd | Professional & scientific | 2023 |
| LMI Properties Limited | Households | 2022 |
| Lodes View Management Company Limited | Households | 2021 |
| Lomas Distribution Limited | Transport & logistics | 1994 |
| Lomas Plant Solutions LLP | | 2020 |
| Lomas Plant Solutions UK Limited | Construction | 2021 |
| London RD Freehold Company Ltd | Real estate | 2025 |
| Lone Pictures Ltd | Information & communication | 2020 |
| Loney Street (Macclesfield) Management Company Limited | Households | 2018 |
| Loring Properties Limited | Financial services | 2014 |
| Lounge Forty 1 Ltd | Other services | 2015 |
| LOW Foot Holdings Ltd | Financial services | 2019 |
| Lower Hurst Organic Limited | Extraterritorial | 2011 |
| Lower Marnshaw Head Ltd | Hospitality | 2018 |
| Lubens Ltd | Hospitality | 2021 |
| Lydgate Farm Limited | Hospitality | 2015 |
| LYL House Ltd | Professional & scientific | 2017 |
| LYL Management Ltd | Real estate | 2017 |
| M & R Chappell Properties Limited | Real estate | 2011 |
| M a Bingham Limited | Transport & logistics | 2019 |
| M Brightmore Racing Limited | Arts & recreation | 2025 |
| M C Beattie Property Limited | Real estate | 2016 |
| M C Snook Consulting Ltd | Administrative & support | 2026 |
| M Heathcote Services Buxton Limited | Transport & logistics | 2008 |
| M J Bassett Limited | Construction | 2011 |
| M J Bassett Plumbing Ltd | Construction | 2025 |
| M LEE CS Ltd | Professional & scientific | 2023 |
| M Simpson Ltd | Construction | 2013 |
| M Woodward Building Contractors Ltd | Construction | 2023 |
| M&A Sweet Treats Ltd | Wholesale & retail | 2025 |
| M.C. Properties (Buxton) Ltd | Construction | 1998 |
| M.C.G Construction Group Ltd | Construction | 2024 |
| M.Markovitz Limited | Wholesale & retail | 1959 |
| Macclesfield Trials Club Limited | Arts & recreation | 2022 |
| Madera Hvdc Consulting Ltd | Information & communication | 2024 |
| Madin & Moss Ltd | Construction | 2021 |
| Madin Steel Limited | Professional & scientific | 2025 |
| Magnet Memories Ltd | Manufacturing | 2025 |
| Magnum Armstrong Investments Limited | Administrative & support | 2008 |
| Mainleafe Training Limited | Other services | 2008 |
| Makarina Ltd | Information & communication | 2020 |
| Make IT Creative Support Limited | Arts & recreation | 2020 |
| Manchesterroofbox Limited | Administrative & support | 2022 |
| Manor Holdings & Activities Limited | Financial services | 2020 |
| Manor Scaffolding Limited | Construction | 2008 |
| Mark Allen UK Limited | Construction | 2003 |
| Mark Bennett Electrical Ltd | Construction | 2016 |
| Mark Vernon Property Services Limited | Construction | 2015 |
| Markovitz Group Holdings Limited | Financial services | 2023 |
| Marlborough Road (Buxton) Management Ltd | Households | 2000 |
| Marsh Green Business Park Limited | Real estate | 2021 |
| Marthall Tree Products Limited | Manufacturing | 1990 |
| Mason Mason and Bowyer Ltd | Professional & scientific | 2012 |
| Masterkey Properties Ltd | Real estate | 2023 |
| Matt Taylor Limited | Information & communication | 2020 |
| Matt Whiting Art Ltd | Manufacturing | 2022 |
| Mattin Maclean Limited | Professional & scientific | 1997 |
| Mavericks Properties Limited | Real estate | 2025 |
| MAY Day Designs Limited | Wholesale & retail | 2026 |
| Mbux Limited | Professional & scientific | 2019 |
| Mccall Associates | | 1993 |
| Mcdonald Wood Construction Limited | Construction | 2002 |
| Mckerrow Farming Ltd | Agriculture & fishing | 2022 |
| MDD Plastering Limited | Construction | 2020 |
| Mdoq Ltd | Information & communication | 2004 |
| Meadowside Veterinary Clinic Ltd | Professional & scientific | 2024 |
| Meet (Castleford) Ltd | Hospitality | 2024 |
| Memories (Buxton) Ltd | Hospitality | 2025 |
| Mercian FS Limited | Financial services | 2021 |
| Merelake Estates Ltd | Real estate | 2006 |
| Merge Decals Limited | Professional & scientific | 2018 |
| Merit Publications Limited | Administrative & support | 2006 |
| Merlin’S Book Emporium Ltd | Wholesale & retail | 2026 |
| Merridale Laycock Limited | Manufacturing | 2003 |
| Merrill Limited | Information & communication | 2017 |
| Metarae Limited | Information & communication | 2022 |
| MFA Property Services Ltd | Construction | 2025 |
| MG Building & Joinery Limited | Construction | 2021 |
| MG Properties & Lettings Limited | Real estate | 2023 |
| MGB Pumping Limited | Administrative & support | 2026 |
| MH Site Maintenance Services Ltd | Manufacturing | 2014 |
| Michael Design Limited | Professional & scientific | 2018 |
| Micro Aviation Limited | Transport & logistics | 2017 |
| Micro Training Cheshire Limited | Arts & recreation | 2024 |
| Micro Training Derbyshire Limited | Arts & recreation | 2024 |
| Microton Limited | Wholesale & retail | 2025 |
| Middlepeak Engineering Limited | Manufacturing | 2001 |
| Midlands Car Giveaways Ltd | Arts & recreation | 2019 |
| Millers Peak Limited | Arts & recreation | 2020 |
| Milway Consulting Limited | Professional & scientific | 2011 |
| Minco Inc. | | 1990 |