| KTT Global Ltd | Transport & logistics | 2016 |
| Kulle Kart Ltd | Professional & scientific | 2026 |
| Kulture Klik Ltd | Administrative & support | 2017 |
| Kunleoyedokun Ltd | Professional & scientific | 2023 |
| Kuro Limited | Real estate | 2000 |
| L J Mach Ltd | Wholesale & retail | 2017 |
| L L Boutique Ltd | Wholesale & retail | 2021 |
| L Spencer Building Contractor Ltd | Construction | 2012 |
| L&E Trans Ltd | Transport & logistics | 2019 |
| L&G Enterprise Ltd. | Health & social care | 2014 |
| L.P.S Personnel Solutions Limited | Administrative & support | 2020 |
| L.R.C Commercial Services Ltd | Professional & scientific | 2025 |
| L.Shepherd Building and Construction Ltd | Construction | 2024 |
| L13 Bar & Events Ltd | Wholesale & retail | 2026 |
| L13 Consultancy & Investments Limited | Professional & scientific | 2022 |
| LA Consultants North West Limited | Professional & scientific | 2024 |
| LA Flooring (Southport) Limited | Construction | 2014 |
| LA Vera Napoli Pizzeria Ltd | Hospitality | 2019 |
| Labeldex Limited | Manufacturing | 2025 |
| Labells Enterprises Ltd | Professional & scientific | 2017 |
| Laburnum House (Shaw) Limited | Health & social care | 1999 |
| Laffa Jaffa Productions Limited | Arts & recreation | 1994 |
| Lakeside Court Management Company (Southport) Limited | Households | 1966 |
| Lakeview Court Property Management Limited | Households | 1990 |
| LAL Qila Indian Takeaway Ltd | Hospitality | 2025 |
| Lalsc Limited | Health & social care | 2018 |
| Lambrinidis Limited | Information & communication | 1999 |
| Lancashire Bathrooms Limited | Wholesale & retail | 2003 |
| Lancashire Driving Ltd | Education | 2019 |
| Lancashire Farms Ltd | Agriculture & fishing | 1974 |
| Lancashire Glass (Holdings) Limited | Real estate | 1972 |
| Lancashire Handy Heroes Ltd | Construction | 2026 |
| Lancashire Heritage (2018) CIC | Arts & recreation | 2018 |
| Lancashire Hygiene Limited | Wholesale & retail | 2006 |
| Lancashire Wills Limited | Professional & scientific | 2014 |
| Lancaster Gardens (1-6) RTM Company Limited | Households | 2023 |
| Lancaster Gardens (14-18) RTM Company Limited | Households | 2023 |
| Lancaster Gardens (7-12) RTM Company Limited | Households | 2023 |
| Lancaster Gardens (Southport) Management Ltd | Households | 2023 |
| Lancaster House (Birkdale) RTM Company Limited | Households | 2009 |
| Lancaster Lodge Southport Limited | Households | 1973 |
| Lancaster Mansions Ltd | Households | 2024 |
| Lancs Tanks Limited | Administrative & support | 2010 |
| Land of Landrovers Ltd | Other services | 2023 |
| Land Properties Limited | Real estate | 2017 |
| Landmark Propco Ltd | Real estate | 2026 |
| Landmark Safeco Ltd | Financial services | 2026 |
| Lanespage Properties Limited | Construction | 1992 |
| Lanherne Consulting Limited | Professional & scientific | 2016 |
| Lansdale Nurseries Limited | Agriculture & fishing | 1988 |
| Lansdowne Bistro Home Experience Ltd | Hospitality | 2025 |
| LAO Developments Ltd | Real estate | 2017 |
| Larkfield Lane Limited | Households | 2021 |
| Laser Clinic Southport Ltd | Other services | 2021 |
| Laser LAB LVP Limited | Other services | 2025 |
| Late Post Records Ltd | Arts & recreation | 2026 |
| Latest Marketing Solutions Ltd | Professional & scientific | 2019 |
| Latham Medical Ltd | Administrative & support | 2023 |
| Latham Property Group Ltd | Real estate | 2020 |
| Lathom Management Ltd | Households | 2020 |
| Lathom Mews Management Company Limited | Households | 2007 |
| Lathom Road Flat Management Limited | Real estate | 2010 |
| Lattimer Precision Engineering Limited | Manufacturing | 2017 |
| Laudan (2020) Limited | Wholesale & retail | 2020 |
| Launchpad Recruitment Limited | Administrative & support | 2025 |
| Laura and Mandy Properties Ltd | Real estate | 2025 |
| Laura Loveday Creative Design Ltd | Professional & scientific | 2015 |
| Lavender Day Spa (2017) Limited | Other services | 2017 |
| Lavender Lactation Ltd | Health & social care | 2025 |
| Lawthority Holdings Limited | Financial services | 2023 |
| Layher Scaffolding Limited | Construction | 2026 |
| Lazy Dragon Ltd | Professional & scientific | 2005 |
| LBM Direct Limited | Wholesale & retail | 2023 |
| LC Action Limited | Information & communication | 2023 |
| Lchm Limited | Agriculture & fishing | 2021 |
| LCJ Housing Ltd | Real estate | 2017 |
| LCO Design Studio Ltd | Wholesale & retail | 2020 |
| LCO Investments Ltd | Real estate | 2022 |
| LD Property (North West) Limited | Real estate | 2017 |
| LDM Civil Engineering Ltd | Construction | 2018 |
| LDM Estates Ltd | Real estate | 2024 |
| LDP Site Services Ltd | Construction | 2025 |
| Ldrt Ltd | Real estate | 2016 |
| LDY Project Planning & Controls Ltd | Construction | 2026 |
| LE BON Espoir Ltd | Financial services | 2022 |
| LE Moose (Southport) Limited | Hospitality | 2018 |
| LE Petit Play Ltd | Administrative & support | 2022 |
| Leader Property Group Limited | Real estate | 2021 |
| Leadfully Limited | Administrative & support | 2022 |
| Leading Edge Holdings Limited | Real estate | 2016 |
| Leading Edge Support Ltd | Professional & scientific | 2007 |
| Lean Therapies Ltd | Health & social care | 2012 |
| Leansave Limited | Real estate | 1993 |
| Learn to Thrive With Michelle Limited | Other services | 2021 |
| Learning Rose Ltd | Transport & logistics | 2019 |
| Leda Management Services Ltd | Information & communication | 2017 |
| Ledson Housing Limited | Real estate | 2020 |
| LEE Health Ltd | Health & social care | 2012 |
| LEE Riley - Building and Construction Services Limited | Construction | 2021 |
| Legal Heroes Limited | Other services | 2015 |