| Land Investment Partners Ltd | Construction | 2025 |
| Land Investments (UK) Ltd | Construction | 2006 |
| Land Leads Ltd | Real estate | 2021 |
| LAND22 Ltd | Real estate | 2025 |
| Landlord Property Compliance Ltd | Construction | 2022 |
| Landmark Facades Ltd | Construction | 2019 |
| Lane Engineering Design Limited | Administrative & support | 1991 |
| Lanedell Ltd | Professional & scientific | 2019 |
| Langley Moore Consulting Limited | Professional & scientific | 2016 |
| Langshore Financial Management Limited | Financial services | 2023 |
| Lansdown Gardens Management Company Limited | Households | 2025 |
| Laraz Control Services Limited | Professional & scientific | 2013 |
| Lark Distribution Ltd | Wholesale & retail | 2019 |
| Lark Project Management Limited | Construction | 2019 |
| LAS Vegas Amusements Limited | Arts & recreation | 1971 |
| Latimer Travel Ltd | Administrative & support | 2026 |
| Laughton Digital Limited | Administrative & support | 2016 |
| Launch Electrical Contracts Limited | Construction | 2024 |
| Launch Fabrications Limited | Manufacturing | 2025 |
| Launch Group Holdings Limited | Financial services | 2025 |
| Launch Laboratories Ltd | Information & communication | 2025 |
| Launch Mechanical Ltd | Construction | 2021 |
| Laura Simpson Holdings Ltd | Financial services | 2024 |
| Laurel House Ltd | Construction | 2016 |
| Laurelle Holdings Limited | Financial services | 2019 |
| Laurelle London Ltd | Manufacturing | 2007 |
| Laurelle Manufacturing Limited | Manufacturing | 2020 |
| Laurelle Property Limited | Construction | 2019 |
| Lausn Limited | Professional & scientific | 2011 |
| LB Maths Tuition Ltd | Education | 2026 |
| LBH Fire Systems Limited | Public administration | 2016 |
| LBL Trading Limited | Wholesale & retail | 2023 |
| LBM Boxing Limited | Administrative & support | 2011 |
| LBM Fitness Limited | Wholesale & retail | 2006 |
| LBM Property Ltd | Real estate | 2015 |
| LBS Enforcement Limited | Professional & scientific | 2007 |
| LBW Property Developments Limited | Construction | 2023 |
| LC Estates Ltd | Real estate | 2018 |
| LCM Administration Services Limited | Administrative & support | 2018 |
| Lcwv Ltd | Real estate | 2024 |
| LDA Estates Ltd | Real estate | 2025 |
| LDC Services Ltd. | Professional & scientific | 2015 |
| LDN Kitchen Ltd | Wholesale & retail | 2023 |
| LE Paragon Limited | Hospitality | 2024 |
| LE Rameur Ltd | Hospitality | 2021 |
| LE Vack Estates Limited | Construction | 2014 |
| Leaders First Ltd | Education | 2018 |
| Leading Edge Carpentry Ltd | Manufacturing | 2015 |
| Leading Edge Fire Stopping Ltd | Construction | 2019 |
| Leading Landscapes Limited | Administrative & support | 2006 |
| Lean Agile Coaching Ltd | Information & communication | 2020 |
| Leapthree Limited | Information & communication | 2016 |
| Lear Medical Limited | Health & social care | 2020 |
| Leas Properties Ltd | Real estate | 2015 |
| Leave IT to Sarah Cleaning Services Limited | Administrative & support | 2025 |
| LED Silent Disco Hire Ltd | Administrative & support | 2021 |
| LEE Adams Wealth Management Limited | Financial services | 2017 |
| Legacy Wills and Trusts (Northwich) Limited | Financial services | 2014 |
| Legally Stolen Art Ltd | Arts & recreation | 2022 |
| Legra Academy Trust | Education | 2012 |
| Legra Brewtap & Dining Ltd | Manufacturing | 2022 |
| Legra Collective Limited | Financial services | 2025 |
| Legra Construction Limited | Construction | 2025 |
| Legra Developments Ltd | Construction | 2012 |
| Legra Electrical and Renewables Limited | Construction | 2023 |
| Legra Plumbing & Heating Limited | Construction | 2025 |
| Legra Properties Limited | Real estate | 2022 |
| Legra Property Management Limited | Real estate | 2019 |
| Legra Soap Ltd | Manufacturing | 2019 |
| Leifsgata Limited | Real estate | 2018 |
| Leigh - Tech 37 Ltd | Wholesale & retail | 2024 |
| Leigh Beads Limited | Manufacturing | 2021 |
| Leigh Business Solutions Ltd | Administrative & support | 2025 |
| Leigh Chemist Limited | Wholesale & retail | 2021 |
| Leigh Commodities Ltd | Financial services | 2021 |
| Leigh Developments Limited | Construction | 2026 |
| Leigh Drinks Company Limited | Wholesale & retail | 2022 |
| Leigh Electrical Limited | Construction | 2016 |
| Leigh Enterprises Limited | Professional & scientific | 2021 |
| Leigh Eyecare Limited | Health & social care | 2002 |
| Leigh Field Ltd | Hospitality | 2024 |
| Leigh Hall Limited | Real estate | 2024 |
| Leigh Heath Court Investments Limited | Real estate | 1971 |
| Leigh Hill Close Residents Limited | Real estate | 2021 |
| Leigh Home & Garden Limited | Construction | 2014 |
| Leigh London Ltd | Other services | 2022 |
| Leigh on Sea Brewing Company Limited | Manufacturing | 2017 |
| Leigh on Sea Catering Limited | Hospitality | 2017 |
| Leigh on Sea Commercial Cleaning Limited | Administrative & support | 2023 |
| Leigh on Sea Plumbing Limited | Construction | 2009 |
| Leigh on Sea Services Ltd | Professional & scientific | 2015 |
| Leigh Property Development and Maintenance Ltd | Construction | 2024 |
| Leigh Rigden Media Consultancy Services Limited | Professional & scientific | 2003 |
| Leigh Sanctuary Limited | Other services | 2004 |
| Leigh Shop Ltd | Wholesale & retail | 2023 |
| Leigh Spice Limited | Hospitality | 2006 |
| Leigh Spirit Company Limited | Manufacturing | 2020 |
| Leigh Treasures Preschool Limited | Education | 2025 |
| Leigh Tutoring Limited | Education | 2015 |
| Leigh Valeting Centre Ltd | Administrative & support | 2025 |