| JTH Farms Limited | Agriculture & fishing | 2002 |
| JTL Services Limited | Professional & scientific | 1998 |
| K & B Design (Lancs) Limited | Professional & scientific | 1997 |
| K & M Acoustics Limited | Wholesale & retail | 2003 |
| K Brown & Partner Limited | Wholesale & retail | 2007 |
| K C Joinery (Preston) Limited | Construction | 2004 |
| K Class Foods Limited | Hospitality | 2003 |
| K D Aerial Services Limited | Information & communication | 2002 |
| K LI Limited | Health & social care | 2003 |
| K Pumps Limited | Administrative & support | 2002 |
| K S J Engineering Limited | Manufacturing | 2007 |
| K Schofield Butchers Ltd | Wholesale & retail | 2004 |
| K T Litho Printers Limited | Manufacturing | 1999 |
| K&G Trading (Importers) Ltd | Wholesale & retail | 2007 |
| K&T Properties (NW) Limited | Real estate | 2026 |
| K. & C. Hird Limited | Agriculture & fishing | 1970 |
| K. Daly Limited | Construction | 2004 |
| K. J. Norris Electrical Limited | Construction | 2003 |
| K.A. Nichols Electrical Limited | Construction | 2007 |
| K.D. Building Limited | Construction | 2002 |
| K.F. Datasave Ltd | Information & communication | 1997 |
| K.K.D. Trailers Ltd. | Manufacturing | 2006 |
| Karabiner Computer Services Limited | Information & communication | 2004 |
| Karen Fenner Consultancy Limited | Professional & scientific | 2002 |
| Karl Kramer Photography Limited | Professional & scientific | 2006 |
| Kasher Trading & Consulting Limited | Wholesale & retail | 2020 |
| Kawal Balti House Limited | Hospitality | 1998 |
| Kaye Kosher Consultants Ltd | Health & social care | 2003 |
| Keenan Spence Ltd | Wholesale & retail | 2025 |
| Keep Fashion Ltd | Wholesale & retail | 2023 |
| KEG Utilities Limited | Construction | 2006 |
| Keily Hampson Ltd | Administrative & support | 2002 |
| Keith Shaw Haulage Limited | Transport & logistics | 2004 |
| KEN Abram (Holdings) Limited | Professional & scientific | 1999 |
| KEN Hodgson Scales Limited | Administrative & support | 2002 |
| Kenlea Properties (Huddersfield) Limited | Administrative & support | 1963 |
| Kenrick & Co Ltd | Real estate | 2003 |
| Kenwyn Properties Limited | Households | 1999 |
| Keoco 181 Limited | Professional & scientific | 1999 |
| Kessel Laird Limited | Hospitality | 1988 |
| Keyglory Limited | Manufacturing | 1983 |
| Keystone Design Associates Limited | Professional & scientific | 1998 |
| Kfitz Ltd | Real estate | 2019 |
| Kilmartin (North West) Limited | Construction | 2005 |
| Kiln Clough Properties Limited | Real estate | 1997 |
| Kilroy P.P.H. Ltd. | Real estate | 1996 |
| Kingprint Limited | Professional & scientific | 2003 |
| Kingswood Estates Limited | Real estate | 2005 |
| Kiss My Name Ltd | Arts & recreation | 2013 |
| KK Thompson Solicitors Limited | Professional & scientific | 2013 |
| Klein Property Holdings Limited | Real estate | 2000 |
| Klenox Limited | Wholesale & retail | 2026 |
| Klexo Enterprises Limited | Transport & logistics | 1991 |
| KM Design Services Limited | Professional & scientific | 2006 |
| KMM Civils Ltd | Construction | 2025 |
| KMM Plant Hire Solutions Ltd | Construction | 2025 |
| Knockout Roadshow Limited | Arts & recreation | 2003 |
| Knowlesway Limited | Financial services | 2020 |
| Kolorspec Limited | Manufacturing | 1995 |
| Kolours Limited | Hospitality | 1999 |
| Kyalami Properties LLP | | 2006 |
| L L G Wheelchairs Limited | Wholesale & retail | 2006 |
| L. V. E. Limited | Administrative & support | 2007 |
| L.A. Joinery Ltd | Construction | 2007 |
| L.A.C. Air Conditioning Limited | Construction | 2005 |
| L.B. Restorations Limited | Wholesale & retail | 1998 |
| L.E.M.O Consulting Limited | Education | 2025 |
| L.G.L. Limited | Construction | 1997 |
| L.J. Mcgrory | | 2001 |
| LA Casa Bar & Restaurant Limited | Hospitality | 2024 |
| LA Pizza 4U Limited | Hospitality | 2023 |
| Lakeland Antiques Limited | Wholesale & retail | 2003 |
| Lakeland Car & Commercial Ltd | Wholesale & retail | 2007 |
| Lakeland Roofing Limited | Construction | 2001 |
| Lakeland Timber Frame Limited | Manufacturing | 2000 |
| Lancashire Bedrooms (2004) Limited | Construction | 2004 |
| Lancashire Building & Brickwork Limited | Construction | 2007 |
| Lancashire Cricket Foundation Limited | Arts & recreation | 2007 |
| Lancashire Edible OIL Limited | Manufacturing | 1996 |
| Lancashire Locums (NW) Limited | Health & social care | 2018 |
| Lancashire Sports Repairs Ltd | Other services | 1994 |
| Lancashire Turf Supplies Limited | Transport & logistics | 2007 |
| Lancaster M.O.T. Centre Limited | Professional & scientific | 2003 |
| Landlord North West Limited | Real estate | 2002 |
| Landmark Investors Limited | Construction | 1979 |
| Landmark Property Consultants Limited | Real estate | 2005 |
| Langho Pharmacy Ltd | Wholesale & retail | 2003 |
| Langworthy Cornerstone Association Limited | Health & social care | 2005 |
| Lanigans Limited | Wholesale & retail | 1949 |
| Laptopbits Ltd. | Wholesale & retail | 2001 |
| Large Financial Limited | Financial services | 2006 |
| Latium Holdings Limited | Professional & scientific | 2006 |
| Laurel Bank Property Management (Lancaster) Limited | Real estate | 2005 |
| Laurels Worldwide Limited | Arts & recreation | 1999 |
| Lawton & Taylor Financial Services Limited | Financial services | 2003 |
| Lawton Bernie Ltd | Wholesale & retail | 2025 |
| LCD Gwynedd Limited | Administrative & support | 2007 |
| LEA Valley Limited | Real estate | 2004 |
| Learn IT UK Limited | Information & communication | 2004 |
| Leatherbarrow & Associates Limited | Manufacturing | 2007 |