| Klass Glass (N.W.) Limited | Construction | 2008 |
| Klass Upvc Limited | Construction | 2008 |
| Kleos-Uk Limited | Information & communication | 2005 |
| Kman Consulting Limited | Professional & scientific | 2005 |
| Kruger Jewellers Limited | Manufacturing | 2003 |
| Kuharska Limited | Wholesale & retail | 2025 |
| Kuumba Imani Millennium Centre Limited | Real estate | 2000 |
| Kwok Wing Foods Limited | Manufacturing | 2007 |
| L & L Property Management Ltd. | Real estate | 2020 |
| L & M Accounts Ltd | Professional & scientific | 2003 |
| L and C Developments (Southport) Ltd | Real estate | 2003 |
| L.F.Moon Limited | Manufacturing | 1964 |
| Lairds Sports Club 93 | Hospitality | 1993 |
| LAK Food and Wine Ltd | Wholesale & retail | 2025 |
| Lancashire Upholstery Ltd | Manufacturing | 2006 |
| Lance Court Management Company Ltd. | Households | 1987 |
| Lane Ends Engineering Limited | Wholesale & retail | 1975 |
| Lattimer Limited | Manufacturing | 1941 |
| Laughton & Wallace (Northern) Limited | Construction | 1986 |
| Laughton & Wallace (Service) Ltd | Construction | 1992 |
| LCR Technical Services Limited | Administrative & support | 2001 |
| LEA Associates Limited | Professional & scientific | 2004 |
| Learning Steps Education Limited | Other services | 1977 |
| Lee's Pharmacy Ltd | Wholesale & retail | 2002 |
| Leech Bedrooms Limited | Construction | 1994 |
| Leech Tarpaulins (Wales) Limited | Extraterritorial | 1984 |
| Leeming Murphy Fabrications Limited | Manufacturing | 2006 |
| Lenbee Properties Limited | Real estate | 1996 |
| Leung Sing Limited | Manufacturing | 2002 |
| Leymac Engineering Services Limited | Professional & scientific | 1976 |
| LFT Management Limited | Professional & scientific | 2017 |
| Life 2 Live Limited | Real estate | 2007 |
| Liferafts International Limited | Manufacturing | 2021 |
| Linwood Partnerships Limited | Professional & scientific | 2002 |
| Lipa Enterprises Limited | Arts & recreation | 1991 |
| Listaid Ltd | Information & communication | 2026 |
| Lite Limited | Education | 1984 |
| Lith Brickwork Limited | Construction | 2003 |
| Live Power Limited | Wholesale & retail | 2000 |
| Lively Lark Scriptwriting Limited | Administrative & support | 2021 |
| Livemanor Homes Limited | Real estate | 1997 |
| Livent Lithium UK Limited | Manufacturing | 2000 |
| Liverpool Basketball Club Ltd | Arts & recreation | 2000 |
| Liverpool Building Material Co. (1983) Limited | Wholesale & retail | 1983 |
| Liverpool Diocesan Board of Finance(The) | Other services | 1883 |
| Liverpool Experience Campus Ltd | Real estate | 2004 |
| Liverpool Medals Limited | Wholesale & retail | 1979 |
| Liverpool University Press 2004 Limited | Information & communication | 2004 |
| Liverpool's Mathew Street Music Festival Limited | Arts & recreation | 1995 |
| Livesey Spottiswood Holdings Limited | Professional & scientific | 2006 |
| Livesey Spottiswood Limited | Professional & scientific | 2002 |
| Load & Go Limited | Wholesale & retail | 2002 |
| Loller Limited | Real estate | 2004 |
| Lowry & Williams Limited | Wholesale & retail | 2006 |
| Lowry Projects Ltd | Construction | 2004 |
| Lrdt Workspace Limited | Real estate | 2007 |
| LTC Properties Ltd | Real estate | 2021 |
| Lucy Lockets Day Nursery Limited | Education | 2005 |
| Ludlow Wealth Management Group Ltd | Financial services | 1996 |
| M and D Medcalf Limited | Construction | 2007 |
| M C P Media Technologies Limited | Information & communication | 1993 |
| M H M (Chester) Limited | Construction | 2004 |
| M. a. Logistics Holdings Limited | Financial services | 2004 |
| M.A.D. Plumbing and Heating Limited | Construction | 2002 |
| M.S. Milton Limited | Wholesale & retail | 1985 |
| M.S.M.Cars Ltd | Wholesale & retail | 2017 |
| Madcutta Ltd | Information & communication | 2016 |
| Madeley Management Limited | Real estate | 2001 |
| Madison Enterprises Limited | Professional & scientific | 2016 |
| Maghull Tyre and Exhaust Limited | Wholesale & retail | 2007 |
| Mail Order Discount Co. (Liverpool) Limited | Transport & logistics | 1964 |
| Malwa Constructions and Double Glazing Ltd | Construction | 2025 |
| Marble Beauty Ltd | Other services | 2025 |
| March Database Consultancy Ltd | Information & communication | 1998 |
| Marchioness Ltd. | Manufacturing | 1917 |
| Marina Court (West Kirby) Freehold Limited | Households | 2017 |
| Marlyn Property Ltd | Real estate | 2021 |
| Marsh Poultry Ltd | Agriculture & fishing | 2011 |
| Marsh's Bakeries Limited | Wholesale & retail | 2000 |
| Martra Brush & Mopstick Cleaning Services Ltd | Other services | 2025 |
| Mash Investments Limited | Real estate | 1992 |
| Mast International Limited | Health & social care | 1981 |
| Master Lock & Safe Limited | Manufacturing | 1987 |
| Masterfix Ceilings Limited | Construction | 2005 |
| Matrix Law Limited | Professional & scientific | 2007 |
| May-Lean & Co. Limited | Manufacturing | 1973 |
| MBL Holdco Ltd | Other services | 2022 |
| MBL Solutions Limited | Administrative & support | 2001 |
| Mccloy Supply Chain Consulting Ltd | Professional & scientific | 2023 |
| Mcdermott Enterprises Ltd | Professional & scientific | 2019 |
| Mcdonald Maintenance Ltd | Other services | 2000 |
| Mcgreal Vance and Associates Limited | Administrative & support | 2003 |
| MCJ Services Limited | Other services | 1997 |
| Mckillop Dental Equipment Limited | Health & social care | 1989 |
| MCL Design Solutions Ltd | Professional & scientific | 2007 |
| Mdlc Services Limited | Health & social care | 2018 |
| MEC North West Enterprises Ltd | Education | 1998 |
| Medesign Limited | Manufacturing | 1982 |
| Medru Limited | Professional & scientific | 2005 |
| Megruc Limited | Real estate | 2010 |