| Law Russell House Limited | Real estate | 2011 |
| LAWAN50 Ltd | Transport & logistics | 2026 |
| Lawbot Ltd | Professional & scientific | 2010 |
| Lawgate Properties Limited | Financial services | 1966 |
| Lawi Property Ltd | Real estate | 2023 |
| Lawi Restaurant Ltd | Hospitality | 2025 |
| Lawrence Build Ltd | Construction | 2025 |
| Lawy Car Sales Ltd | Wholesale & retail | 2022 |
| Lawyer Assist AI Ltd | Information & communication | 2023 |
| LAX Customs Ltd | Manufacturing | 2024 |
| Laycock & Sons Limited | Construction | 2024 |
| Layden Retail Consulting Ltd | Professional & scientific | 2024 |
| Layerthorpe Limited | Extraterritorial | 1991 |
| Layl Ltd | Wholesale & retail | 2026 |
| Layla Couture Ltd | Wholesale & retail | 2019 |
| Laywell Beds Ltd | Manufacturing | 2018 |
| Laziz Food Ltd | Hospitality | 2025 |
| Lazy Beds Ltd | Wholesale & retail | 2013 |
| Lazzaro Limited | Wholesale & retail | 2016 |
| LB Personal Physio Ltd | Health & social care | 2014 |
| LBM Engineering Ltd | Professional & scientific | 2022 |
| Lbpr Solutions Limited | Other services | 2017 |
| LBT Services Ltd | Administrative & support | 2023 |
| LC Payroll Services Ltd | Professional & scientific | 2024 |
| LCB Trading Cambridge Ltd | Wholesale & retail | 2021 |
| LCD Transport Ltd | Administrative & support | 2017 |
| LCD Yorkshire Ltd | Construction | 2006 |
| LCF Law Limited | Professional & scientific | 2014 |
| LCF Legal Services Group Limited | Professional & scientific | 2024 |
| LCF Residential Limited | Professional & scientific | 2006 |
| LCR Trading Ltd | Hospitality | 2018 |
| Lcuk Bradford Ltd | Other services | 2021 |
| LD Property Lets Limited | Real estate | 2026 |
| LD Property Maintenance & Developments Ltd | Construction | 2026 |
| Ldmc Yorkshire Ltd | Hospitality | 2024 |
| LDN DXB Ltd | Wholesale & retail | 2019 |
| Ldragomir Logistics Ltd | Transport & logistics | 2025 |
| LDS (BFD) Services Ltd | Other services | 2015 |
| LDZ Property Management Ltd | Real estate | 2024 |
| LE Coeur Cafe Limited | Hospitality | 2024 |
| Leabrooks Club Limited | Arts & recreation | 1994 |
| Lead Corporate Reconstruction Limited | Professional & scientific | 2023 |
| Lead Future Holdings Limited | Professional & scientific | 2022 |
| Leadeatt Limited | Financial services | 2024 |
| Leaded Glass Studios Ltd | Manufacturing | 2023 |
| Leader Wholesale Group Limited | Wholesale & retail | 2021 |
| Leading Properties Limited | Professional & scientific | 2014 |
| Leaf of Light Ltd | Professional & scientific | 2025 |
| Leafield Homes Ltd | Real estate | 2024 |
| Leak JET Limited | Construction | 2026 |
| Leap Private Hire Limited | Extraterritorial | 2011 |
| Leap Taxis Limited | Transport & logistics | 2011 |
| Learn 2 Lead School of Motoring Ltd | Other services | 2019 |
| Learn Your Faith Ltd | Education | 2018 |
| Learners Lodestar Ltd | Education | 2025 |
| Learning College International Limited | Education | 2016 |
| Learning Legends CIC | Education | 2025 |
| Learnwise Esol Centre Ltd | Education | 2024 |
| Lease 2 Own Ltd | Wholesale & retail | 2018 |
| Leather Handicrafters Ltd | Manufacturing | 2025 |
| Leather Made Limited | Manufacturing | 2025 |
| Leather Pulse Ltd | Wholesale & retail | 2025 |
| Leaventhorpe Stables Limited | Agriculture & fishing | 2009 |
| LED BUG Limited | Administrative & support | 2012 |
| LED Innovation Ltd | Wholesale & retail | 2018 |
| LED Light Sheet Limited | Extraterritorial | 2012 |
| Ledgertech Accountants Ltd | Professional & scientific | 2025 |
| LEE M Pickles Limited | Extraterritorial | 2024 |
| LEE Montana Pickles Limited | Extraterritorial | 2024 |
| LEE Pickles Limited | Extraterritorial | 2024 |
| LEE Stafford Limited | Administrative & support | 2007 |
| Leeds & Bradford Homes Limited | Construction | 2005 |
| Leeds & Bradford Properties Limited | Construction | 2002 |
| Leeds & London Land Limited | Real estate | 2011 |
| Leeds Acro Limited | Construction | 2009 |
| Leeds Autocare (Yorkshire) Ltd | Wholesale & retail | 2025 |
| Leeds Cakes & Shakes Limited | Hospitality | 2018 |
| Leeds Canine Hydrotherapy Limited | Professional & scientific | 2025 |
| Leeds City Office Park Ltd | Construction | 2024 |
| Leeds Cleaning Company Ltd | Administrative & support | 2025 |
| Leeds Container Storage Cmpyl Ltd | Transport & logistics | 2026 |
| Leeds Crownbridge UK Ltd | Wholesale & retail | 2025 |
| Leeds Digital Media Limited | Information & communication | 2020 |
| Leeds Foot Care Ltd | Health & social care | 2021 |
| Leeds Hill Ltd | Wholesale & retail | 2022 |
| Leeds Hire Limited | Administrative & support | 2013 |
| Leeds Injector Centre Limited | Extraterritorial | 2025 |
| Leeds Karsales Limited | Real estate | 1934 |
| Leeds Lifts Ltd | Manufacturing | 2020 |
| Leeds Radio Ltd | Wholesale & retail | 2019 |
| Leeds Road Boxing Club Ltd | Arts & recreation | 2024 |
| Leeds Road Carpets Limited | Wholesale & retail | 2016 |
| Leeds Road Commercial Limited | Real estate | 2025 |
| Leeds Road Fest Ltd | Health & social care | 2024 |
| Leeds Road Fisheries Yorkshire Limited | Other services | 2016 |
| Leeds Road Grocery Limited | Wholesale & retail | 2020 |
| Leeds Road Investments Ltd | Real estate | 2023 |
| Leeds Road Kitchen BD3 Limited | Manufacturing | 2025 |
| Leeds Road Local Market Ltd | Wholesale & retail | 2024 |
| Leeds Road Plaza Limited | Real estate | 2019 |