| LDI Management Limited | Real estate | 2021 |
| LDL Motors Ltd | Wholesale & retail | 2016 |
| Ldm-Facilities Management Ltd | Real estate | 2017 |
| Ldmj Ltd | Wholesale & retail | 2015 |
| LDP Property Management Ltd | Real estate | 2025 |
| LDR Utilities Ltd | Construction | 2015 |
| Ldrs Group Ltd | Construction | 2025 |
| LDS Art & Sound Limited | Wholesale & retail | 2023 |
| LDS Batley Ltd | Hospitality | 2025 |
| LDS Beeston Ltd | Hospitality | 2026 |
| LDS Bradford Ltd | Hospitality | 2025 |
| LDS Car Hire Ltd | Administrative & support | 2026 |
| LDS Great Horton Ltd | Hospitality | 2025 |
| LDS HB01 Corp Stores Ltd | Wholesale & retail | 2024 |
| LDS Lighting Ltd | Manufacturing | 2022 |
| LDS Liverpool Ltd | Hospitality | 2026 |
| LDS Property Investments Ltd | Real estate | 2024 |
| LDS Quickil Limited | Administrative & support | 2026 |
| LDS15 WAG Consultants Ltd | Energy | 2025 |
| LE Digital Ltd | Information & communication | 2025 |
| LE Grand Fromage Unlimited | Financial services | 2025 |
| LE Group LLP | | 2012 |
| LE Kaffe Ltd | Hospitality | 2024 |
| LE Petit Fromage Unlimited | Financial services | 2025 |
| LE Raaj Chester Moor NE Ltd | Hospitality | 2024 |
| LE Raaj Group Ltd | Financial services | 2024 |
| LE Raaj Morpeth NE Ltd | Hospitality | 2024 |
| LE Raaj Sedgefield NE Ltd | Hospitality | 2024 |
| LE Savoir Etre Limited | Hospitality | 2013 |
| Le&Hi Property Estates Ltd | Real estate | 2025 |
| LEA Cleaner Ltd | Administrative & support | 2022 |
| LEA Lettings Limited | Real estate | 2017 |
| Leaan Bailey Properties Ltd | Real estate | 2025 |
| Lead Actions Capital Limited | Hospitality | 2020 |
| Lead Housing Ltd | Households | 2024 |
| Lead Partnership Ltd | Education | 2025 |
| Lead Smile Ltd | Information & communication | 2026 |
| Lead Technologies (Europe) Limited | Information & communication | 2008 |
| Leadengate House Limited | Real estate | 2010 |
| Leadenhall Insurance Brokers Limited | Financial services | 2002 |
| Leader Education Limited | Administrative & support | 2024 |
| Leader Facilities Management Limited | Administrative & support | 2024 |
| Leader Limited | Construction | 1997 |
| Leader Recruitment Group Limited | Administrative & support | 2020 |
| Leading Care Solutions Limited | Administrative & support | 2023 |
| Leading Edge 2022 Ltd | Construction | 2022 |
| Leading Edge Fall Protection Ltd. | Professional & scientific | 2019 |
| Leading Edge Leeds Ltd | Construction | 2022 |
| Leading Link Support Limited | Administrative & support | 2024 |
| Leading Supported Living Limited | Health & social care | 2024 |
| Leadon Pet Supplies Ltd | Manufacturing | 2022 |
| Leadpilot Limited | Information & communication | 2025 |
| Leads Genie Sweden Limited | Professional & scientific | 2024 |
| Leads Kompany Ltd | Wholesale & retail | 2019 |
| Leads United Ltd | Professional & scientific | 2009 |
| Leadvisiq Limited | Information & communication | 2025 |
| Leafield Group Ltd | Education | 2022 |
| Leafield House Limited | Real estate | 2018 |
| Leah Jayne Ltd | Other services | 2026 |
| Leake.Io Limited | Information & communication | 2019 |
| Leaks Plumbing Services Limited | Construction | 2005 |
| Leaky Barrel Candle Co. Ltd | Manufacturing | 2023 |
| Leamington Mortgage Corporation Limited | Extraterritorial | 1986 |
| Lean Consulting & Recruitment Limited | Administrative & support | 2026 |
| Lean Finance Solutions Ltd | Professional & scientific | 2025 |
| Leanflow Consulting Limited | Professional & scientific | 2006 |
| Leanih Limited | Professional & scientific | 2022 |
| Leaning Technologies Limited | Information & communication | 2012 |
| Leanna Claire Corban Limited | Administrative & support | 2018 |
| Leanne Glennon Therapeutic Services Ltd | Health & social care | 2025 |
| Leap DOT Cloud Limited | Information & communication | 2017 |
| Leap Solutions Ltd | Manufacturing | 2019 |
| Leap Travel Limited | Transport & logistics | 2024 |
| Learn 2 Drive Leeds Ltd | Education | 2025 |
| Learn Q Limited | Information & communication | 2022 |
| Learn to Master Ltd | Information & communication | 2014 |
| Learning Opportunities VIA Ejhaz CIC | Health & social care | 2022 |
| Learning Partnerships | Information & communication | 1991 |
| Learning Spaces Global Limited | Manufacturing | 2023 |
| Learnqual Ltd | Education | 2020 |
| Leasechecker (UK) Limited | Financial services | 2006 |
| Leasehold Debt Recovery Limited | Administrative & support | 2016 |
| Leasehub Properties Ltd | Real estate | 2026 |
| Leaventhorpe Hall Developments Limited | Construction | 2020 |
| Leaver Consulting Limited | Professional & scientific | 2019 |
| Lebestia Fitness Ltd | Education | 2021 |
| Leboss Services Ltd | Transport & logistics | 2023 |
| LEC Aspired Investment Co Ltd | Real estate | 2015 |
| Leconfield Strategic Solutions Limited | Information & communication | 2020 |
| LED Autolamps Europe LLP | | 2010 |
| LED Hive Limited | Manufacturing | 2013 |
| LED Site Limited | Manufacturing | 2016 |
| Leda Design and Development Ltd | Administrative & support | 2019 |
| Leda Developments Limited | Real estate | 2003 |
| Ledgard Bridge Management Company Limited | Households | 2006 |
| Ledge Property Services Ltd | Construction | 2023 |
| Ledgeredge Ltd | Information & communication | 2020 |
| Ledohubo Limited | Professional & scientific | 2014 |
| Ledor Ltd | Manufacturing | 2025 |
| Ledsham Cricket Club Limited | Arts & recreation | 2020 |