| KPB Cardiology Ltd | Health & social care | 2012 |
| Kraftier Co Ltd | Wholesale & retail | 2024 |
| Kscc Cards Ltd | Wholesale & retail | 2026 |
| KSW Marketing Limited | Administrative & support | 2026 |
| Kushboo Wellness Limited | Health & social care | 2026 |
| KYM Nails Beauty Ltd | Other services | 2025 |
| L Cowking Building Contractors Limited | Construction | 2005 |
| L&T Jackson Holdings Ltd | Financial services | 2023 |
| LA Bella Mozzarella Ltd | Hospitality | 2021 |
| LA Chiqe Ltd | Other services | 2017 |
| LA Civils Ltd | Construction | 2025 |
| LAK Endoscopy Limited | Health & social care | 2017 |
| Lakeland Coaches Limited | Professional & scientific | 2000 |
| Lakes Ready MIX Ltd | Manufacturing | 2026 |
| Lancashire Car Spares Ltd | Wholesale & retail | 2023 |
| Lancashire Enterprise Trust Ltd | Professional & scientific | 2009 |
| Lancashire Notary Ltd | Professional & scientific | 2021 |
| Lancashire PA Hire Ltd | Other services | 2020 |
| Laneside Soap Company Ltd | Manufacturing | 2022 |
| Lanx Group Limited | Wholesale & retail | 2017 |
| Lapp Associates Limited | Administrative & support | 2018 |
| Latium Roofing Systems Limited | Professional & scientific | 2006 |
| Laund Holding Company Limited | Construction | 1960 |
| Launderama Burnley Ltd | Other services | 2025 |
| Laundry Maintenance Nationwide Ltd | Information & communication | 2019 |
| LC- ANP Services Limited | Health & social care | 2013 |
| LCT Solutions Limited | Construction | 2014 |
| LE Designs Ltd | Professional & scientific | 2025 |
| Leafield Windows Limited | Construction | 2010 |
| Leagram Mill Farm Ltd | Agriculture & fishing | 2023 |
| Lean Learning Collective Ltd | Professional & scientific | 2025 |
| Lean Sigma Improvements Ltd | Professional & scientific | 2023 |
| Leaping Lizards Events & Parties Ltd | Hospitality | 2025 |
| Leaping Lizards Play Centre Ltd. | Arts & recreation | 2014 |
| Learnivf.Com Ltd | Extraterritorial | 2015 |
| Leeming Enterprises Limited | Real estate | 2009 |
| Leeming Property Limited | Real estate | 2009 |
| Legato Communications Ltd. | Professional & scientific | 2015 |
| Lent Lettings Limited | Real estate | 2025 |
| Leodensian Consulting Ltd | Professional & scientific | 2023 |
| Lester Surgical Ltd | Wholesale & retail | 2024 |
| Levi Properties Ltd | Real estate | 2025 |
| Lewis Mitchell Limited | Professional & scientific | 2020 |
| LEX System Ltd | Wholesale & retail | 2024 |
| Lexfit Corp Ltd | Manufacturing | 2016 |
| Liam Fahy & Associates Ltd | Administrative & support | 2013 |
| Liamtron Metals Limited | Wholesale & retail | 2025 |
| Liamtron UK Limited | Wholesale & retail | 2025 |
| Licensing Matters Ltd | Professional & scientific | 2006 |
| Lidun Group Limited | Hospitality | 2008 |
| Lifenet (U.K.) Limited | Construction | 2000 |
| Lift Installation Services Ltd | Professional & scientific | 2017 |
| Lifting Management Group Ltd | Construction | 2021 |
| Light Gear Limited | Manufacturing | 2024 |
| Lightbulb Law Limited | Professional & scientific | 2025 |
| Lightingspiration Ltd | Wholesale & retail | 2018 |
| Lightworks Stained Glass Limited | Manufacturing | 2003 |
| Linda Skellorn Ltd | Health & social care | 2008 |
| Linen Club Limited | Wholesale & retail | 2025 |
| Links Club Ltd | Wholesale & retail | 2026 |
| Linton Medics Ltd | Health & social care | 2026 |
| Little Acorns Child Care Limited | Education | 2001 |
| Little Acorns Hindley Green Ltd | Health & social care | 2006 |
| Little Acorns Holdings Ltd | Financial services | 2021 |
| Little Acorns Padiham Ltd | Education | 2022 |
| Little Green BUS Ltd | Transport & logistics | 2010 |
| Little JAN CAN Limited | Wholesale & retail | 2020 |
| Little Middop Farm Limited | Hospitality | 2022 |
| Little Middop Homes Ltd | Real estate | 2024 |
| Little Wonders Box Company Ltd | Education | 2025 |
| Livewire Systems Ltd | Extraterritorial | 2024 |
| LJ Albion & Sons Ltd | Wholesale & retail | 2026 |
| LJT Joinery & Construction Ltd | Construction | 2025 |
| LKR Ltd | Wholesale & retail | 2024 |
| LL Investments Holdings Ltd | Financial services | 2026 |
| LME Wealth Management Ltd | Financial services | 2013 |
| LN Consulting Ltd | Administrative & support | 2022 |
| Location Power Limited | Extraterritorial | 2023 |
| LOE Catering Limited | Hospitality | 2025 |
| Logic North West Limited | Professional & scientific | 2011 |
| London Breast Imaging Associates Ltd | Health & social care | 2015 |
| Lorenzo BRO Limited | Information & communication | 2025 |
| Lotready Ltd | Information & communication | 2026 |
| Lottie and Companions Limited | Wholesale & retail | 2023 |
| Lottiedesigns Limited | Professional & scientific | 2011 |
| Lotus Medical Limited | Health & social care | 2024 |
| Louise Masters Reiki Ltd | Other services | 2026 |
| Love Local Solutions Ltd | Administrative & support | 2013 |
| Love to Brand Ltd | Professional & scientific | 2010 |
| Lower Shorrock HEY Farms Limited | Real estate | 1989 |
| Lower Wellgate Ltd | Real estate | 2010 |
| Lowther Investments Ltd | Professional & scientific | 2023 |
| Loyal Lettings Limited | Real estate | 2023 |
| Lsbp Lettings Limited | Real estate | 2025 |
| Lsbp Property Services Limited | Real estate | 2025 |
| LSN Healthcare Planning Limited | Health & social care | 2022 |
| Lspt Ltd | Health & social care | 2023 |
| Luccol Ltd | Wholesale & retail | 2025 |
| Lucy Hair & Beauty Limited | Other services | 2020 |
| Luna 90 Limited | Administrative & support | 2015 |