| Lancastrian Properties Holdings Limited | Financial services | 2023 |
| Lancastrian Properties Ltd | Real estate | 2012 |
| Lancsboro Ltd | Construction | 2025 |
| Laneside Holdings (NW) Limited | Financial services | 2026 |
| Laneside Investments Ltd | Financial services | 2023 |
| Langtec Holdings Limited | Financial services | 1993 |
| Langtec International Limited | Financial services | 2010 |
| Langtec Limited | Manufacturing | 1958 |
| Langtec Mica Limited | Manufacturing | 2001 |
| Lantex Holdings Limited | Financial services | 2018 |
| Lantex Manufacturing Company Limited | Manufacturing | 1918 |
| Laser Medicine at the Wellness Centre Ltd | Health & social care | 2021 |
| Laundercentre Limited | Other services | 2017 |
| Launderette Collections Ltd | Administrative & support | 2017 |
| Laura Bolton Ltd | Real estate | 2018 |
| Law Simplified Ltd | Information & communication | 2020 |
| Lawler&Sons Ltd | Construction | 2025 |
| Laxoria Ltd | Wholesale & retail | 2024 |
| Lazyverse Ltd | Information & communication | 2025 |
| LBC (NW) Limited | Arts & recreation | 2024 |
| LC Electrical Contracts Ltd | Construction | 2014 |
| LD Dirt Warriors Limited | Administrative & support | 2021 |
| LD Service and Repairs Ltd | Professional & scientific | 2026 |
| LD Timber Ltd | Manufacturing | 2025 |
| LE Rain Florist Ltd | Wholesale & retail | 2018 |
| Lead & Rein VP Limited | Professional & scientific | 2024 |
| Leafy Technologies Ltd | Wholesale & retail | 2019 |
| Learn Different Ltd | Education | 2025 |
| LEE LEE Property Ltd | Extraterritorial | 2018 |
| Leevan Properties Limited | Real estate | 2025 |
| Legacy INK Supplies Ltd | Wholesale & retail | 2024 |
| Legionary Security Group Ltd | Administrative & support | 2025 |
| Lend Logic Ltd | Administrative & support | 2016 |
| LENNY24/7 Ltd | Administrative & support | 2021 |
| Leopard Cabs Ltd | Transport & logistics | 2022 |
| Lesbi-Naughty Ltd | Wholesale & retail | 2024 |
| LET Management Group Ltd | Professional & scientific | 2016 |
| Lettamar Ltd | Hospitality | 2024 |
| Letting Locations Limited | Real estate | 2004 |
| Lew@Lewscales.Com Limited | Professional & scientific | 2026 |
| LGA Dynamics Ltd | Manufacturing | 2025 |
| Lgrm Engineering Projects Ltd | Construction | 2022 |
| Lgrm Services Ltd | Construction | 2024 |
| LH Classics Limited | Wholesale & retail | 2024 |
| Life Celebrated Limited | Other services | 2012 |
| Lift & Shift Professional Services Limited | Transport & logistics | 2026 |
| Lift AID Limited | Manufacturing | 1987 |
| Lift-Rigg UK Limited | Construction | 2021 |
| Liger Digital Studio Ltd | Information & communication | 2016 |
| Ligna Interiors Limited | Construction | 2012 |
| Lilian Barbars Limited | Other services | 2026 |
| Lindsay Jane Ltd | Other services | 2014 |
| Linkyme Ltd | Wholesale & retail | 2025 |
| Lion Rock Properties Limited | Real estate | 2020 |
| Liquid Management Solutions Limited | Extraterritorial | 2002 |
| Little BEE Play Cafe Limited | Hospitality | 2024 |
| Little Crown 2025 Limited | Hospitality | 2025 |
| Little Strawberry Limited | Professional & scientific | 2017 |
| Little Tinkers Child Care Limited | Education | 2007 |
| Little Treasures Nursery NW Ltd | Education | 2024 |
| Litunk Ltd | Real estate | 2018 |
| Livesey Provisions Ltd | Hospitality | 2026 |
| Living Solutions (NW) Ltd | Real estate | 2020 |
| Liyas Care Ltd | Health & social care | 2020 |
| LJF Welding and Fabrication Ltd | Manufacturing | 2026 |
| LJM Facilities Management Ltd | Administrative & support | 2025 |
| LN Race Performance Limited | Wholesale & retail | 2026 |
| Local Champion Tyres UK Limited | Wholesale & retail | 2026 |
| Location Events UK Limited | Hospitality | 2023 |
| Lochness Interior Design Ltd | Wholesale & retail | 2024 |
| Loftlogik Ltd | Construction | 2023 |
| Lola Belle Boutique Limited | Wholesale & retail | 2020 |
| Loom Loft Limited | Wholesale & retail | 2018 |
| Lords Sewing Limited | Wholesale & retail | 2024 |
| Lorenz Corp Limited | Information & communication | 2016 |
| Lorimers Ales (1919) Limited | Manufacturing | 2013 |
| Lorne Bancroft Ltd | Construction | 2026 |
| Louise Grimshaw Ltd | Extraterritorial | 2022 |
| Lovecars Ltd | Wholesale & retail | 2009 |
| LP Sheet Metal Ltd | Manufacturing | 2021 |
| LPA Today Ltd | Administrative & support | 2014 |
| LPB Solutions Ltd | Professional & scientific | 2019 |
| LS Facilities Management Ltd | Administrative & support | 2021 |
| LS Leisure Group Ltd | Arts & recreation | 2024 |
| LS Theatres Ltd | Arts & recreation | 2023 |
| Lsfm Investments Limited | Financial services | 2025 |
| Lsfm Limited | Financial services | 2020 |
| LTC North West Limited | Professional & scientific | 2019 |
| LTC R Oak Limited | Hospitality | 2025 |
| Lubezone Limited | Manufacturing | 2024 |
| Luci (Accrington) Limited | Hospitality | 2025 |
| Lucky Eddie Limited | Wholesale & retail | 2008 |
| Lumbapro Limited | Health & social care | 2017 |
| Lumen Tutela Ltd | Professional & scientific | 2025 |
| Lutschg Family Investments Ltd | Real estate | 2020 |
| Lutschg Financial Investments Ltd | Financial services | 2016 |
| Lutschg Property Investments Ltd | Real estate | 2016 |
| Luxorama Retails Ltd | Wholesale & retail | 2023 |
| Luxury AID Ltd | Wholesale & retail | 2021 |
| Luxury Life International Ltd | Wholesale & retail | 2020 |