| Lamb, Law & Consultants Ltd | Professional & scientific | 2025 |
| Lambeth & Southwark Community Transport | Transport & logistics | 2002 |
| Lambys Butchers Ltd | Wholesale & retail | 2025 |
| Lamlane Ltd | Hospitality | 2025 |
| Lamm Properties Ltd | Real estate | 2024 |
| Lamp (NW) Ltd | Education | 2009 |
| Lampadina Limited | Wholesale & retail | 2016 |
| Lampridis Medical Ltd | Health & social care | 2025 |
| Lamrock Limited | Professional & scientific | 2017 |
| Lamtek Services Ltd | Mining & quarrying | 2024 |
| Lamy Rail Ltd | Construction | 2017 |
| LAN Fries Limited | Hospitality | 2023 |
| LAN Rail Ltd | Construction | 2018 |
| Lana Entertainment Ltd | Arts & recreation | 2026 |
| Lana Flannery Trading Limited | Professional & scientific | 2019 |
| Lanabild Limited | | 1980 |
| Lanataeback Ltd | Real estate | 2015 |
| Lancashire Bespoke Homes Limited | Construction | 2020 |
| Lancashire Care Association Limited | Other services | 2026 |
| Lancashire County Rugby Football Union Limited | Arts & recreation | 2009 |
| Lancashire Holiday Homes Limited | Hospitality | 2023 |
| Lancashire Machinery Services Limited | Wholesale & retail | 2019 |
| Lancaster Gamelin Ltd | Real estate | 2021 |
| Lancaster Joinery and Construction Ltd | Construction | 2023 |
| Lancroft Properties Limited | Real estate | 1972 |
| Land Air Limited | Transport & logistics | 2004 |
| Land and Brew Ltd | Hospitality | 2026 |
| Land and Commercial Limited | Real estate | 2008 |
| Land Assembly (UK) Limited | Real estate | 2004 |
| Land Bridge Technical Support Ltd | Construction | 2021 |
| Land Ecology Ltd | Extraterritorial | 2011 |
| Land of Lodges UK Ltd | Manufacturing | 2025 |
| Land of Tricks Ltd | Information & communication | 2023 |
| Land Planning Limited | Professional & scientific | 2001 |
| Land Sea Solutions Ltd | Professional & scientific | 2020 |
| Land Search and Data Limited | Administrative & support | 2017 |
| Land Settlement 1. Ltd | Real estate | 2023 |
| Land Settlement Group 2. Limited | Real estate | 2023 |
| Land Value Limited | Administrative & support | 2012 |
| Land's END Limited | Professional & scientific | 1991 |
| Landbank Limited | Professional & scientific | 2002 |
| Lander Property Services Limited | Real estate | 2024 |
| Landframe Securities Limited | Construction | 1998 |
| Landlord Assist UK App Ltd | Professional & scientific | 2025 |
| Landlord Services Manchester Ltd | Real estate | 2024 |
| Landmark Express Ltd | Hospitality | 2020 |
| Landmark Joinery Ltd | Construction | 2018 |
| Landmark Law Limited | Professional & scientific | 2012 |
| Landmark Office Units Ltd | Real estate | 2009 |
| Landor Planning Consultants Limited | Professional & scientific | 2018 |
| Landoy Ltd | Real estate | 2025 |
| Landscape Projects (Properties) Ltd | Financial services | 2002 |
| Landscape Projects Ltd | Professional & scientific | 1999 |
| Landseek Limited | Construction | 2018 |
| Landsky Properties Ltd | Real estate | 2018 |
| Landtech Contracting Ltd | Construction | 2025 |
| Landtech Surveying Limited | Construction | 2026 |
| Landtech Training Limited | Education | 2025 |
| Landways Limited | Professional & scientific | 1980 |
| Lane B&A Academy Ltd | Education | 2026 |
| Lane Fabrication Ltd | Professional & scientific | 2012 |
| Lane Gastro Pubs Ltd | Real estate | 2021 |
| Lanetown Capital L.P. | | 2018 |
| Lang Engineering Consultancy Ltd | Administrative & support | 2019 |
| Lang Engineering Limited | Construction | 2026 |
| Langan Capital Ltd | Financial services | 2023 |
| Langan Property Ltd | Real estate | 2019 |
| Langberrys Limited | Hospitality | 2006 |
| Langdale Acquisitions Limited | Other services | 2010 |
| Langdale View HB Ltd | Real estate | 2021 |
| Langdawe Limited | Manufacturing | 1993 |
| Langford Homes (NW) Ltd | Construction | 2018 |
| Langton Law Ltd | Professional & scientific | 2022 |
| Langtons Payroll Services Limited | Information & communication | 1977 |
| Langtons Professional Services Limited | Professional & scientific | 2014 |
| Language Legends Education Ltd | Education | 2025 |
| Language Scanners Limited | Professional & scientific | 2024 |
| Lanigans Bar Liverpool Limited | Hospitality | 2017 |
| Lanigans Slater Street Ltd | Hospitality | 2020 |
| Lanisan Ltd | Hospitality | 2007 |
| Lanka Clothing Ltd | Wholesale & retail | 2020 |
| Lannervale Limited | Manufacturing | 2002 |
| Lannigan Autos Ltd | Wholesale & retail | 2008 |
| Lanos Cleaning Services Limited | Administrative & support | 2023 |
| Lanrest Advisory Ltd | Professional & scientific | 2024 |
| Lansdown Associates Ltd | Real estate | 2018 |
| Lanson Consultancy Limited | Professional & scientific | 2024 |
| LAO Bistro Ltd | Hospitality | 2025 |
| Lapis Global Limited | Wholesale & retail | 2026 |
| Laptop Power (NW) Limited | Other services | 2010 |
| Larchleigh Developments Limited | Real estate | 1984 |
| Larchwood Estates Ltd | Real estate | 2023 |
| Larchwood Homes Ltd | Real estate | 2023 |
| Larcomm Ltd | Information & communication | 2026 |
| Larikas Brazilian Taste Ltd | Hospitality | 2023 |
| Lario Consulting Ltd | Information & communication | 2024 |
| Larisa RAU Limited | Administrative & support | 2018 |
| Laritma Ltd | Administrative & support | 2014 |
| Lark Lane 2020 Ltd | Hospitality | 2020 |
| Lark Lane Conservatory Ltd | Hospitality | 2019 |