| Lakewax Ltd | Other services | 2007 |
| Lakhani Estates (Harrow) Limited | Construction | 2022 |
| Lakhani Estates (London) Limited | Construction | 2022 |
| Lakhani Investments Ltd | Construction | 2024 |
| Lakhs Properties Limited | Real estate | 2020 |
| Lakisha Consultancy Ltd | Health & social care | 2023 |
| Laksa Cafe Limited | Hospitality | 2017 |
| Lakshan Foods Ltd | Hospitality | 2025 |
| Lakshio Group Ltd | Wholesale & retail | 2025 |
| Lakshmi Hands | Hospitality | 2017 |
| Laksmi Homes Limited | Real estate | 2024 |
| Lakul Properties Ltd | Real estate | 2021 |
| Lala-Tini Limited | Other services | 2014 |
| Lalale Foods and Events Limited | Manufacturing | 2021 |
| Lalani Michaelis Ltd. | Professional & scientific | 2014 |
| Lalco London Ltd | Real estate | 2021 |
| Laleza Property Investment Ltd | Real estate | 2021 |
| Lalibella Management Limited | Real estate | 2004 |
| Lalita Holdings Limited | Real estate | 2018 |
| Lalji Services Ltd | Real estate | 2026 |
| Lally Medical Services Ltd | Health & social care | 2018 |
| Lamadsie Medical Consulting Limited | Health & social care | 2009 |
| Lamba Enterprises Limited | Wholesale & retail | 2006 |
| Lambeth Action for Youth C.I.C. | Education | 2011 |
| Lambo Property Limited | Real estate | 2019 |
| Lambov Ltd | Construction | 2013 |
| Lambspot Limited | Real estate | 2014 |
| Lamda Property Ltd | Real estate | 2023 |
| Lammerite Property Limited | Real estate | 2024 |
| Lamour Destination Management Ltd | Administrative & support | 2024 |
| Lamour Voyages Europe Ltd | Administrative & support | 2022 |
| Lamsal Ltd | Professional & scientific | 2025 |
| Lamyra LLP | | 2011 |
| Lana TV Ltd | Information & communication | 2018 |
| Lana+Tv Ltd | Manufacturing | 2018 |
| Lanark Student Living Limited | Construction | 2015 |
| Lancaster House (Chesham) Management Company Limited | Households | 2013 |
| Lancaster House Residents Association Limited | Households | 2001 |
| Lancelot Developments Limited | Real estate | 2006 |
| Lancelot Medical Center Ltd | Health & social care | 2026 |
| Land & Equity City Limited | Financial services | 1994 |
| Land & Equity Investments Ltd | Administrative & support | 2013 |
| Land Brooke Limited | Other services | 2020 |
| Land Brooke Properties Limited | Real estate | 2025 |
| Land Countrywide Limited | Real estate | 2023 |
| Land Investment Property Services Limited | Real estate | 2013 |
| Land Leader Ltd | Real estate | 2016 |
| Land Mercantile Limited | Financial services | 1988 |
| Land of Property Limited | Real estate | 2024 |
| Land Security Ltd | Administrative & support | 2016 |
| Landara Limited | Administrative & support | 2007 |
| Landarb Solutions Ltd | Administrative & support | 2018 |
| Landform DG Limited | Financial services | 2015 |
| Landlord Assistance Service Ltd | Administrative & support | 2024 |
| Landlord Building Certificates Ltd | Construction | 2021 |
| Landlords Maintenance Ltd | Real estate | 2016 |
| Landmark Bridging Limited | Financial services | 2005 |
| Landmark Estates (London) Limited | Construction | 2014 |
| Landmark G Limited | Real estate | 2025 |
| Landmark Property (Acton) Ltd | Real estate | 2017 |
| Landmark Property (Ealing) Ltd | Real estate | 2020 |
| Landmark Property (Peckham) Limited | Construction | 2014 |
| Landmark Property (SB) Ltd | Construction | 2022 |
| Landmark Property London Limited | Households | 2013 |
| Landmark Property SS Ltd | Financial services | 2024 |
| Landon Investments Ltd | Professional & scientific | 2026 |
| Landsdowne Developments Limited | Other services | 2018 |
| Landview Carpentry & Joinery Limited | Construction | 2017 |
| Landway Investments Limited | Real estate | 2022 |
| Lane International Ltd | Professional & scientific | 2023 |
| Lanehta Ltd | Wholesale & retail | 2026 |
| Lanemede Property Limited | Administrative & support | 2005 |
| Laneview Properties Limited | Real estate | 2002 |
| Langdale Hills Properties Ltd | Real estate | 2022 |
| Langdale Residents (Wembley) Limited | Households | 1970 |
| Langdons Group Limited | Construction | 2026 |
| Langham Court (Ruislip) RTM Company Limited | Households | 2023 |
| Langham Property Co. Limited | Real estate | 1973 |
| Langley Court Management Co. Limited | Households | 1988 |
| Langstone (GB) Limited | Wholesale & retail | 2013 |
| Languages Online Ltd | Education | 2014 |
| Langworthy Management (Hatch END) Limited | Households | 1978 |
| Lanik Developments Limited | Construction | 2011 |
| Lanik Holdings Limited | Financial services | 2018 |
| Laninfosys Limited | Information & communication | 2025 |
| Lanis Catering Limited | Hospitality | 2025 |
| Lanisa Limited | Professional & scientific | 2019 |
| Lankan Parcel Ltd | Transport & logistics | 2021 |
| Lankika Motors Limited | Administrative & support | 2016 |
| Lans G.D Engineering Limited | Professional & scientific | 2003 |
| Lans GD Invest Limited | Real estate | 2024 |
| Lanstones Property Limited | Construction | 2020 |
| Lantern Health CIC | Health & social care | 2011 |
| Lantrade Global Supplies Limited | Other services | 1995 |
| Lanz & Associates Limited | Professional & scientific | 2025 |
| Laocoon Gallery Limited | Wholesale & retail | 2019 |
| LAP16 Limited | Professional & scientific | 2021 |
| Lapcol Surgical Services Limited | Health & social care | 2013 |
| Lapislink Ltd. | Financial services | 2019 |
| Laptopdeal UK Ltd | Wholesale & retail | 2025 |