| Layluu Ltd | Wholesale & retail | 2024 |
| Layne & Layne Ltd | Real estate | 2014 |
| Lazarkiskrakers Ltd | Wholesale & retail | 2026 |
| Lazarous Limited | Health & social care | 2014 |
| Laze Days Holidays Limited | Hospitality | 2017 |
| Lazuli Blue Limited | Financial services | 2023 |
| Lazy Bones Homes Limited | Real estate | 2024 |
| Lazyboy AI Ltd | Information & communication | 2026 |
| LB Digital Ltd | Professional & scientific | 2018 |
| LB Novatrax Ltd | Transport & logistics | 2025 |
| LB Transport Ltd | Transport & logistics | 2025 |
| Lbarbos Limited | Construction | 2022 |
| LBC Consultancy Ltd | Administrative & support | 2020 |
| Lbnbluetrans Ltd | Transport & logistics | 2020 |
| LBP Estate Planning Limited | Financial services | 2008 |
| LBR Homes Ltd | Health & social care | 2023 |
| LBS Property Solutions Ltd | Construction | 2024 |
| Lbty Limited | Construction | 2025 |
| LBV Medical Ltd | Health & social care | 2021 |
| LC Breakers Ltd | Wholesale & retail | 2026 |
| LC Digital Limited | Information & communication | 2020 |
| LC Legal Solutions Ltd | Professional & scientific | 2025 |
| LC Leicester Catering Equipments Ltd | Wholesale & retail | 2025 |
| LC Ltd | Financial services | 2019 |
| LC Motors (UK) Limited | Wholesale & retail | 2014 |
| LC R2R Ltd | Real estate | 2019 |
| LC SC Energy Ltd | Professional & scientific | 2021 |
| LC SCA Ltd | Real estate | 2019 |
| LC SCE Ltd | Real estate | 2019 |
| LC SCM HH Ltd | Real estate | 2018 |
| LC Surfacing Limited | Construction | 2020 |
| LC Vehicle Limited | Wholesale & retail | 2019 |
| Lc&C Ltd | Manufacturing | 2022 |
| Lcak Pubs Ltd | Hospitality | 2026 |
| LCB Events Ltd | Other services | 2023 |
| LCJ Developments Ltd | Construction | 2025 |
| Lcjones Ltd | Wholesale & retail | 2025 |
| LCP & Sons Building & Civil Engineering Limited | Construction | 2026 |
| Lcpa Limited | Education | 2014 |
| LCS Direct Limited | Wholesale & retail | 2016 |
| LD Electrical Contractors Ltd | Construction | 2022 |
| LDA Commercial Ltd | Financial services | 2025 |
| LDA Communications Limited | Professional & scientific | 1999 |
| LDC Cable Jointers Limited | Construction | 2025 |
| LDD Builders Limited | Construction | 2025 |
| LDH Group Limited | Construction | 2017 |
| LDH Plumbing and Electrical Limited | Construction | 2017 |
| LDH Royale Products Limited | Manufacturing | 2016 |
| LDN Event Management Ltd | Professional & scientific | 2019 |
| LDO Logistics Recruitment Ltd | Administrative & support | 2025 |
| Ldo.Uk Ltd | Transport & logistics | 2020 |
| LDP Brickwork Ltd | Construction | 2022 |
| LDP Window Cleaning Ltd | Administrative & support | 2016 |
| Ldrs Limited | Professional & scientific | 2006 |
| LDS Hire & Sales Ltd. | Manufacturing | 2013 |
| LDT Holdings Limited | Professional & scientific | 2014 |
| LE Automotive Groupe Ltd | Administrative & support | 2024 |
| LE Capital UK (Asset 1) Limited | Information & communication | 2020 |
| LE Capital UK (Asset 2) Limited | Information & communication | 2024 |
| LE Capital UK Limited | Information & communication | 2020 |
| LE Cars Automotive Ltd | Wholesale & retail | 2026 |
| LE Gourmand Ltd | Transport & logistics | 2013 |
| LE MAZ Ltd | Real estate | 2019 |
| LE Property Holdings Ltd | Real estate | 2020 |
| LE Rouge Limited | Manufacturing | 2005 |
| LE Thrift Limited | Other services | 2024 |
| LE1+1 Clothiing Ltd | Wholesale & retail | 2014 |
| LE10 Motors Company Ltd | Wholesale & retail | 2019 |
| LE18 Property Innovations Limited | Real estate | 2026 |
| LE2 Vapes Ltd | Wholesale & retail | 2026 |
| LE2 Ventures Limited | Financial services | 2026 |
| LE4 Electrical Services Ltd | Construction | 2023 |
| LE4 Properties Ltd | Real estate | 2024 |
| LE4 Rainbow Pizza Ltd | Hospitality | 2025 |
| LE5 Ltd | Real estate | 2025 |
| LE9 Caravan Storage Ltd | Transport & logistics | 2020 |
| LE9 Storage Ltd | Other services | 2021 |
| Lead Careers Pharma Ltd | Administrative & support | 2025 |
| Lead Conneqt Limited | Information & communication | 2025 |
| Lead for Life C.I.C. | Education | 2026 |
| Lead Fresh Catering Ltd | Manufacturing | 2024 |
| Lead Market Technology Solutions Ltd | Information & communication | 2009 |
| Lead-Pd Ltd | Professional & scientific | 2026 |
| Leader Fire Protection Ltd | Public administration | 2021 |
| Leader Flooring Ltd | Construction | 2006 |
| Leadgate Established Ltd | Transport & logistics | 2015 |
| Leading Finish Solutions Ltd | Construction | 2025 |
| Leading Projects for Imbort Co Ltd | Wholesale & retail | 2026 |
| Leadtech Tehcnologies Limited | Extraterritorial | 2016 |
| Leaf Displays Ltd | Manufacturing | 2024 |
| Leaf Miles Limited | Transport & logistics | 2025 |
| Leaf Trading Limited | Wholesale & retail | 2019 |
| Leafico Sustainable Solutions Ltd | Manufacturing | 2023 |
| Leaflet Lanes Ltd | Professional & scientific | 2025 |
| Leafy Designs Limited | Transport & logistics | 2006 |
| Leam Financial Services Limited | Professional & scientific | 2026 |
| Lean Partners Ltd | Hospitality | 2020 |
| Lean Your Efforts Ltd | Professional & scientific | 2015 |
| Leaninfo Consulting UK Limited | Professional & scientific | 2010 |
| Leanpie Ltd | Manufacturing | 2009 |