| Lancaster Wines Limited | Wholesale & retail | 2013 |
| Lancaster Woodcraft Limited | Manufacturing | 2011 |
| LANCASTER13 Ltd | Hospitality | 2025 |
| Lancasterclinic:Advanced Prescribing Limited | Health & social care | 2026 |
| Lancastercr Ltd | Other services | 2017 |
| Lancastrian Associates Limited | Wholesale & retail | 2018 |
| Lancastrian Estates (Preston) Limited | Real estate | 2018 |
| Lancastrian Estates Limited | Real estate | 2005 |
| Lancastrian Lettings Limited | Real estate | 2025 |
| Lancit Haulage Limited | Transport & logistics | 2009 |
| Land + Sea Lancaster Ltd | Hospitality | 2020 |
| Land Ahoy Studio Ltd | Professional & scientific | 2025 |
| Landlord Supply Services Ltd | Wholesale & retail | 2021 |
| Langate Consultancy Limited | Professional & scientific | 2025 |
| Lanmore Ltd | Construction | 2015 |
| Lanor Productions Ltd | Information & communication | 2011 |
| Lanpro Limited | Agriculture & fishing | 2001 |
| Lanshaw Enterprises Limited | Real estate | 1999 |
| Lanshaw Holdings Limited | Financial services | 2016 |
| Lanshospitality Ltd | Hospitality | 2024 |
| Lanweb Limited | Arts & recreation | 2012 |
| Lanx Private Ambulance Service Ltd | Transport & logistics | 2025 |
| Large Animal Locums Ltd | Professional & scientific | 2020 |
| Larsen Ltd | Administrative & support | 2025 |
| Laser Skate Shop Ltd | Extraterritorial | 2024 |
| Laterem Management Limited | Construction | 2022 |
| Laume Ltd | Wholesale & retail | 2024 |
| Laume Ventures Ltd | Real estate | 2024 |
| Laundrybelle Ltd | Other services | 2026 |
| Laura Bruce Dance Academy Limited | Arts & recreation | 2025 |
| Laurelle Limited | Wholesale & retail | 2002 |
| Laureston Management Company Ltd | Households | 2021 |
| Laverick Hall Caravan Site Limited | Hospitality | 2024 |
| Lawla Holdings Limited | Financial services | 2023 |
| Lawn Development Consultants Limited | Professional & scientific | 2023 |
| Lawson Dairy Ltd | Agriculture & fishing | 2019 |
| Lawson's Farm Limited | Agriculture & fishing | 2010 |
| Lbsliving Limited | Real estate | 2021 |
| LC Developers Ltd | Construction | 2025 |
| LC Smith Consultancy Limited | Information & communication | 2012 |
| Lccp Limited | Health & social care | 2003 |
| LCD Support Services Limited | Administrative & support | 2009 |
| LDC Dance Limited | Arts & recreation | 2024 |
| LDL Lifestyle Ltd | Wholesale & retail | 2025 |
| LDR Holdings Limited | Financial services | 2020 |
| Leach House Farm Management Company Limited | Real estate | 2001 |
| Leanne Edwards School of Theatre Arts Limited | Arts & recreation | 2024 |
| Leapers Rock Ltd | Mining & quarrying | 2016 |
| Leaps & Bounds Preschool Ellel CIC | Education | 2018 |
| Leathermonkeyla Ltd | Wholesale & retail | 2026 |
| LEE CHA Lancaster Ltd | Wholesale & retail | 2022 |
| LEE Engineering Limited | Manufacturing | 1999 |
| LEE Grant Joinery and Building Limited | Construction | 2000 |
| LEE Jones Personal Training Limited | Health & social care | 2022 |
| Leeds - Morecambe Community Rail Partnership Company Ltd | Transport & logistics | 2006 |
| Legacy Angel Limited | Professional & scientific | 2017 |
| Legionnaire Security Ltd | Administrative & support | 2024 |
| Lehmann Food Ingredients Limited | Wholesale & retail | 2003 |
| Leicestershire Spring Dance Festival Limited | Arts & recreation | 2024 |
| Leisure Park Cabins Limited | Hospitality | 2025 |
| Leisure Park Holdings Limited | Financial services | 2025 |
| Leisure Park Pods Limited | Construction | 2024 |
| Leisure Park Pro Ltd | Professional & scientific | 2024 |
| Lekker Wines Limited | Wholesale & retail | 2020 |
| Lennox Bookkeeping & Accountancy Ltd | Professional & scientific | 2014 |
| Leong Locums Limited | Health & social care | 2024 |
| Leonovation Limited | Professional & scientific | 2025 |
| LES Pots Limited | Manufacturing | 2020 |
| Leshy Consulting Limited | Information & communication | 2025 |
| Less (Lancaster District) CIC | Education | 2007 |
| Lets Live Lettings Ltd | Real estate | 2017 |
| Lets Rent IT Limited | Real estate | 2021 |
| LHD Solicitors Limited | Professional & scientific | 2010 |
| LHF Properties Limited | Construction | 2022 |
| Lhtc Holdings Limited | Financial services | 2019 |
| Liam Roskell Heating Services Ltd | Construction | 2021 |
| Liam Shannon Word & Performance Limited | Arts & recreation | 2022 |
| LID Assist Ltd | Wholesale & retail | 2018 |
| Life and Wild Ecology Ltd | Professional & scientific | 2026 |
| Lighthouse Care NW Limited | Health & social care | 2024 |
| LIL Beatz Limited | Wholesale & retail | 2018 |
| Lime Tree Property Renovations Ltd | Real estate | 2025 |
| Lime Tree Property Services Ltd | Construction | 2018 |
| Limeburners Arms Limited | Hospitality | 2008 |
| Lina Energy Ltd | Manufacturing | 2017 |
| Linier Ltd | Administrative & support | 2017 |
| Link Plant Limited | Construction | 2014 |
| Linndale Ltd | Professional & scientific | 2022 |
| Linnk Limited | Professional & scientific | 2006 |
| Linsfort 978 Ltd | Real estate | 2019 |
| Lion Heart Promotions Limited | Information & communication | 2025 |
| Lion's DEN Real Estate Limited | Real estate | 2023 |
| Liquidance Limited | Arts & recreation | 2026 |
| Litcraft: Bringing the Text to Life C.I.C. | Education | 2024 |
| Little Sloggers Cricket Academy Ltd | Arts & recreation | 2025 |
| Littledale Hall Farm Limited | Energy | 2011 |
| Littledale Hall Generations Limited | Financial services | 2025 |
| Littledale Hall Therapeutic Community Limited | Health & social care | 2005 |
| Littledale Mews Management Company Limited | Households | 1990 |
| Live Love Perform Limited | Arts & recreation | 2024 |