| Laziza Halal Meat Ltd | Wholesale & retail | 2024 |
| Lbia Holding Limited | Professional & scientific | 2006 |
| Lcvs Enterprises Limited | Administrative & support | 1980 |
| Leas Country Park Management Limited | Households | 1987 |
| Leeds Back and Foot Centres Limited | Health & social care | 2002 |
| Leeds Road Dental Practice Limited | Health & social care | 2007 |
| Leeds Sculpture Workshop | Real estate | 2001 |
| Leeds Student Homes Limited | Education | 2000 |
| Legend Electrics Ltd. | Administrative & support | 1992 |
| Lejista Design Studio Ltd | Manufacturing | 2007 |
| Leonard Jowett (Holdings) Limited | Financial services | 1977 |
| Levi Solicitors LLP | | 2005 |
| Lewis Metal Fabrications Limited | Manufacturing | 2005 |
| Liberty Software Development Ltd | Information & communication | 2007 |
| Lightgridge Enterprises Ltd | Wholesale & retail | 2025 |
| Lindley Print & Design Ltd | Manufacturing | 2004 |
| Linguashop Limited | Real estate | 2002 |
| Link Jewellery Limited | Wholesale & retail | 1978 |
| Linton Logistics Limited | Transport & logistics | 2000 |
| Lionel Robinson & Co Limited | Professional & scientific | 1932 |
| LIR Limited | Other services | 2001 |
| Lister Engineering Limited | Manufacturing | 1999 |
| Lister Seven Limited | Professional & scientific | 1984 |
| Lizard King Records Limited | Information & communication | 2005 |
| LKM Group Ltd | Transport & logistics | 2026 |
| Lloyd Loaders (M.H.) Limited | Manufacturing | 1960 |
| LMM Holdings Limited | Professional & scientific | 2006 |
| Lodore Communication Cabling Limited | Construction | 2008 |
| Logic On-Line Limited | Information & communication | 1996 |
| London Law School Limited | Extraterritorial | 1999 |
| Longley Community Sports Club | Arts & recreation | 2003 |
| Longwood Engineering Company Limited | Manufacturing | 1902 |
| Lordgrade Estates Limited | Water & waste | 1999 |
| Lota Enterprises Limited | Wholesale & retail | 2007 |
| Lota Properties Limited | Real estate | 2007 |
| LOW Farm Garage Limited | Wholesale & retail | 2004 |
| LPD (Holdings) Limited | Real estate | 2008 |
| LRC Group Limited | Professional & scientific | 2002 |
| Lunarko Peak Technologies Ltd | Wholesale & retail | 2025 |
| Lupton Stores Limited | Wholesale & retail | 2004 |
| Luxury Fibres Limited | Administrative & support | 2007 |
| Luxury Yarns International Limited | Administrative & support | 2008 |
| Lverston Sheet Metal and Engineering Company Limited | | 1986 |
| M and M Yorkshire Stone Products Limited | Mining & quarrying | 2004 |
| M El-Khoueiry Limited | Information & communication | 2007 |
| M H & S a Webster Limited | Wholesale & retail | 2003 |
| M W Denton Limited | Professional & scientific | 2007 |
| M Widdup & Sons Limited | Manufacturing | 1951 |
| M. Rotherforth & Company Limited | | 1976 |
| M.A. Stephenson Limited | Construction | 2007 |
| M.E.C.R. Draughting Limited | Administrative & support | 1997 |
| M.H. Castle Limited | Wholesale & retail | 2007 |
| M1 Hose & Hydraulics Limited | Manufacturing | 2001 |
| Macgay Consultants Limited | Real estate | 1983 |
| Machinery Moving Services Limited | Transport & logistics | 2005 |
| Mahmood Rizvi Accountancy Services Limited | Professional & scientific | 1998 |
| Majestic Estates Ltd | Construction | 2001 |
| Majestic Interactive Limited | Information & communication | 2001 |
| Make IT Happen NOW Ltd | Professional & scientific | 2004 |
| Malik Poultry Products Limited | Wholesale & retail | 2004 |
| Maltman Property Limited | Real estate | 2006 |
| Mamas & Papas (Holdings) Limited | Professional & scientific | 2003 |
| Mamas & Papas Limited | Wholesale & retail | 2003 |
| Manasamitra Limited | Arts & recreation | 2005 |
| Mancroft Limited | Wholesale & retail | 2006 |
| Mango Vegetarian Limited | Hospitality | 2008 |
| Manningham Project Limited | Information & communication | 2002 |
| Manor Precision Ltd | Manufacturing | 2005 |
| Mantis Numerics Limited | Professional & scientific | 1987 |
| Margaret Mode Ltd | Wholesale & retail | 2026 |
| Mark Bradley Projects Limited | Professional & scientific | 2005 |
| Mark Gant Ltd | Construction | 2008 |
| Mark Kellett Builder Ltd | Construction | 2006 |
| Marshall (Building Contractors) Ltd | Construction | 1969 |
| Marshall Building Contractors (Facilities Management) Limited | Construction | 2001 |
| Marshall Construction (Northern) Limited | Construction | 1979 |
| Marshall Construction (West Yorkshire) Limited | Construction | 1979 |
| Marshall Holdings Limited | Professional & scientific | 1976 |
| Martial Properties Limited | Real estate | 2005 |
| Martin Gough Limited | Professional & scientific | 2003 |
| Martin Knowles Electrical Limited | Construction | 2006 |
| Martin Pursey Limited | Professional & scientific | 2007 |
| Martini Productions Limited | Extraterritorial | 2005 |
| Marvell Consultants Limited | Professional & scientific | 1985 |
| Masons Catering Limited | Wholesale & retail | 2006 |
| Masons Limited | Professional & scientific | 1988 |
| Mastercraft Memorials Limited | Extraterritorial | 1997 |
| Mattelle Limited | Information & communication | 1996 |
| Matthew J. Millican Limited | Health & social care | 2006 |
| Mawdsley Williams Limited | Extraterritorial | 2005 |
| Maxxnft Limited | Education | 2025 |
| Mazzakerry Limited | Construction | 2007 |
| MBA Business Solutions Ltd. | Information & communication | 2000 |
| Mccartney I.T. Consulting Limited | Information & communication | 2001 |
| Mccormack Opticians Limited | Health & social care | 2004 |
| Mcgowan Signs Limited | Administrative & support | 1999 |
| Mclean Consultants Limited | Extraterritorial | 1998 |
| Mctigue Funeral Directors Limited | Other services | 2006 |
| Meadowsprite Limited | Manufacturing | 2000 |
| Measured Ltd | Professional & scientific | 2002 |