| Leasing Equipment Disposals Limited | Financial services | 2006 |
| Ledbrook Limited | Real estate | 1999 |
| Leek Bearings Limited | Wholesale & retail | 2008 |
| Leek Tools and Fasteners Ltd | Professional & scientific | 2003 |
| Leigh Engineering & Management Services Limited | Administrative & support | 2001 |
| Leloop Estates Limited | Real estate | 2004 |
| Lely Center Midlands Ltd | Wholesale & retail | 2009 |
| Leomansley Associates Limited | Professional & scientific | 2016 |
| Leoni Pension Trustees Limited | Financial services | 2000 |
| Leoni Wiring Systems U.K. Limited | Manufacturing | 2000 |
| Lets Party & Lets Dance Limited | Wholesale & retail | 2003 |
| Lets Play (UK) Ltd | Construction | 2003 |
| Lichfield Accident Repair Centre Limited | Wholesale & retail | 1999 |
| Lichfield Cathedral Enterprises Ltd. | Wholesale & retail | 1985 |
| Lichfield Computer Centre Ltd | Other services | 2005 |
| Lichfield Diocesan Board of Finance(Incorporated)(The) | Other services | 1929 |
| Lichfield Specsavers Limited | Wholesale & retail | 1994 |
| Lichfield Survey Supplies Limited | Professional & scientific | 2005 |
| Lichfield Visionplus Limited | Wholesale & retail | 1994 |
| Lidr Contract Furniture Limited | Manufacturing | 1986 |
| Lifestyle (Lichfield) Limited | Real estate | 1999 |
| Linfield Care Limited | Health & social care | 2002 |
| Linkbox Limited | Real estate | 1998 |
| Lipstudio Limited | Information & communication | 2003 |
| Livestock Exchange Worldwide Limited | Wholesale & retail | 2005 |
| LK Mid-Staffs Limited | Arts & recreation | 2006 |
| Lotus Pond and Garden Services Limited | Administrative & support | 2021 |
| Loudwater Services Limited | Professional & scientific | 1998 |
| Louis Sandy Limited | Real estate | 1926 |
| Lovett 2 Care Holdings Limited | Financial services | 2024 |
| LRO Creative Ltd | Arts & recreation | 2022 |
| LSC Nursing & Care Services Ltd | Health & social care | 2006 |
| LUX Auto Valeting Ltd | Wholesale & retail | 2024 |
| M and M Ball Plant Limited | Construction | 2004 |
| M J P Structural Design Limited | Professional & scientific | 2003 |
| M Madders Farming Limited | Agriculture & fishing | 2008 |
| M.Davies Butchers Limited | Hospitality | 2003 |
| M.G. Evans & Sons Limited | Other services | 2001 |
| M.H.C. Industrials Limited | Manufacturing | 1957 |
| M.J. Smith (Butchers) Ltd. | Wholesale & retail | 2002 |
| Machinery Systems Ltd. | Wholesale & retail | 1992 |
| Mackinnon Staffordshire Limited | Professional & scientific | 2000 |
| Major Motors Limited | Wholesale & retail | 2005 |
| Malcolm Wain Agricultural Supplies Limited | Wholesale & retail | 2009 |
| Malik Poultry Limited | Manufacturing | 1978 |
| Mammoet Offshore Services Limited | Transport & logistics | 1983 |
| Manifold Commercials Limited | Wholesale & retail | 2002 |
| Manumit Trading Limited | Wholesale & retail | 1999 |
| Mark Anthony Logistics Ltd. | Professional & scientific | 2005 |
| Mark Everill Ltd. | Construction | 2001 |
| Mark Titley Carpentry Limited | Construction | 2000 |
| Marketing Angel Limited | Professional & scientific | 2005 |
| Marnie Ceylon Shipping Line Ltd | Wholesale & retail | 2020 |
| Martin Gilbert Antiques Limited | Wholesale & retail | 2002 |
| Mary Jones Design Limited | Professional & scientific | 2002 |
| Mason Architectural Hardware Limited | Manufacturing | 2004 |
| Mason's Ironstone China Limited | Professional & scientific | 1987 |
| Masons Hospitality Limited | Hospitality | 2022 |
| Mass Vehicle Leasing Ltd | Administrative & support | 2024 |
| Matco Holdings Limited | Construction | 2000 |
| Matheson Knight Ltd | Construction | 2007 |
| Mawson & Roche Limited | Other services | 2002 |
| MAX Frank Limited | Manufacturing | 2007 |
| Maximity Limited | Information & communication | 2004 |
| Mayes & Warwick Limited | Manufacturing | 1949 |
| Meadow Farm Foods Limited | Wholesale & retail | 1999 |
| Metalline (Services) Limited | Manufacturing | 1990 |
| Metaphorically Training Limited | Professional & scientific | 1999 |
| Mgfcs Ltd | Financial services | 2006 |
| Mgnl Ltd | Manufacturing | 2025 |
| Michelin Development Limited | Administrative & support | 2002 |
| Michelin Lifestyle Limited | Administrative & support | 2000 |
| Micronics Filtration Limited | Manufacturing | 1995 |
| Microtec Networks Limited | Information & communication | 2008 |
| Midco Toy Planet Ltd | Wholesale & retail | 2007 |
| Midland Chiropractic Limited | Health & social care | 2006 |
| Midland Karting Limited | Arts & recreation | 2001 |
| Midland Sewing Services Limited | Other services | 2003 |
| Midland Timber Limited | Manufacturing | 1992 |
| Midsoft UK Limited | Information & communication | 2005 |
| Midway Surveying Limited | Energy | 2007 |
| Mikado Packaging Limited | Wholesale & retail | 1999 |
| Mill House Inns Limited | Professional & scientific | 1994 |
| Millennium Chicken UK Limited | Hospitality | 2016 |
| Millers Quay Management Company Limited | Households | 1997 |
| Millward Auto Electrics Limited | Manufacturing | 2002 |
| Milwards (Chemists) Ltd | Wholesale & retail | 2003 |
| Minim Investments Limited | Real estate | 1967 |
| Mobile Applications Limited | Administrative & support | 1981 |
| Mobile Telescopic Cranes Limited | Administrative & support | 1985 |
| Moducel A.H. Ltd | Manufacturing | 2016 |
| Moments of Beauty Limited | Other services | 2005 |
| Mortgage Advice (Staffs) Limited | Financial services | 2004 |
| Morton Installation Ltd | Construction | 2015 |
| Mortonlloyd Ltd | Real estate | 2023 |
| Motorglaze Limited | Wholesale & retail | 2007 |
| MPK Projects Limited | Construction | 2013 |
| Mullaney Construction Limited | | 1999 |
| Multilec Electrical Contractors Limited | Construction | 2006 |
| Murtagh Seafoods Limited | Manufacturing | 2004 |