| Laurence Skinner Limited | Real estate | 2021 |
| Laurus Enterprises Limited | Professional & scientific | 2010 |
| Lavender Analytics Limited | Information & communication | 2019 |
| Lavender Fields Ltd | Professional & scientific | 2023 |
| Lavenham Close 1969 Limited | Extraterritorial | 2015 |
| Lavery Advisory & Support Services Ltd | Professional & scientific | 2025 |
| Lavian Ltd | Transport & logistics | 2014 |
| Lavinia Stewart-Brown Events Ltd | Hospitality | 2018 |
| Lavish Babies Ltd | Wholesale & retail | 2020 |
| Lavish Looks Saloon Ltd | Other services | 2025 |
| Lavone Ltd | Other services | 2021 |
| Lavy Grocery Ltd | Wholesale & retail | 2022 |
| Lavy Properties Ltd | Real estate | 2024 |
| Law Firm Services Limited | Information & communication | 2001 |
| Law Trans Ltd | Transport & logistics | 2019 |
| Lawal Properties Limited | Construction | 2024 |
| Lawateq Ltd | Information & communication | 2026 |
| Lawford Exhibits Limited | Other services | 2005 |
| Lawnscape Gardeners Ltd | Administrative & support | 2018 |
| Lawnscience (Bucks) Ltd | Administrative & support | 2023 |
| Lawrence Cleaning Services Limited | Administrative & support | 2003 |
| Lawrence Lawns Ltd | Administrative & support | 2015 |
| Lawrie's Holdings Limited | Financial services | 2026 |
| Lawrie's Property Rental Limited | Real estate | 2026 |
| Lawrie’S Block Paving Limited | Construction | 2022 |
| Lawson Development Projects Ltd | Construction | 2025 |
| Lawson Independent Financial Services Ltd. | Financial services | 2012 |
| Lawsy Property Services Ltd | Households | 2025 |
| Lawton Northants Ltd | Wholesale & retail | 2014 |
| Lawton Rental Ltd | Real estate | 2022 |
| Laxiran Limited | Wholesale & retail | 2025 |
| LAY Enterprises Limited | Construction | 2024 |
| LAY Homes Ltd | Real estate | 2025 |
| Layfem Global Resources Ltd | Health & social care | 2024 |
| Layifa Apartments Ltd | Real estate | 2025 |
| Layifa Property (Deals) Ltd | Administrative & support | 2025 |
| Layla's Lair Limited | Wholesale & retail | 2023 |
| Layo's Pristine Touch Limited | Administrative & support | 2025 |
| Layoprestige Limited | Professional & scientific | 2019 |
| Layton Letts Limited | Financial services | 2020 |
| Laytondings Entertainments Limited | Arts & recreation | 2012 |
| Layus Investment Ltd | Hospitality | 2026 |
| Laza Ltd | Transport & logistics | 2024 |
| Lazar Pro Construction Ltd | Construction | 2022 |
| Lazeez Lebanese Tapas Ltd | Administrative & support | 2014 |
| LB Transport 1 Ltd | Transport & logistics | 2025 |
| LB UK Services Limited | Professional & scientific | 2021 |
| LBC Logistics Limited | Transport & logistics | 2019 |
| LBC Utility Solutions Ltd | Construction | 2019 |
| LBP Outlander Series 3 Ltd | Information & communication | 2016 |
| LC Hedging and Grass Maintenance Ltd | Administrative & support | 2021 |
| LC Stoneworks Ltd | Construction | 2026 |
| LCC Rail and Civil Services Ltd | Construction | 2026 |
| LCH Electrical Services Ltd | Construction | 2023 |
| LCJ Group Ltd | Administrative & support | 2024 |
| LCL Housing Limited | Real estate | 2017 |
| LCL Trading Ltd | Transport & logistics | 2018 |
| LCM Bookkeeping & Accounting Limited | Professional & scientific | 2026 |
| LD Admin Solutions Limited | Education | 2012 |
| LD Brickwork Services Limited | Construction | 2023 |
| LD Pressure Washing Services Ltd | Administrative & support | 2022 |
| LD Roofing Services Limited | Construction | 2016 |
| LD Roofing Supplies Limited | Wholesale & retail | 2022 |
| LD Scaffolding Ltd | Construction | 2020 |
| LD Scaffolding Services Ltd | Construction | 2020 |
| LD Services Holdings Limited | Financial services | 2022 |
| Ld-Fhp Limited | Professional & scientific | 2025 |
| LDB Send Consultant Limited | Education | 2022 |
| LDC Property Ltd | Real estate | 2024 |
| LDN Agency Limited | Administrative & support | 2019 |
| LDN Aviation Ltd | Professional & scientific | 2025 |
| Ldny Foundation | Health & social care | 2014 |
| LDT Projects Limited | Real estate | 2023 |
| LE Hagley Property Three Ltd | Real estate | 2025 |
| LE Holloway Property Eight Ltd | Real estate | 2023 |
| LE Holloway Property Eleven Ltd | Real estate | 2023 |
| LE Holloway Property Fifteen Ltd | Construction | 2023 |
| LE Holloway Property Five Ltd | Construction | 2023 |
| LE Holloway Property Four Ltd | Real estate | 2023 |
| LE Holloway Property Fourteen Ltd | Real estate | 2023 |
| LE Holloway Property Nine Ltd | Real estate | 2023 |
| LE Holloway Property One Ltd | Construction | 2023 |
| LE Holloway Property Seven Ltd | Construction | 2023 |
| LE Holloway Property SIX Ltd | Real estate | 2023 |
| LE Holloway Property TEN Ltd | Real estate | 2023 |
| LE Holloway Property Thirteen Ltd | Real estate | 2023 |
| LE Holloway Property Three Ltd | Construction | 2023 |
| LE Holloway Property Twelve Ltd | Real estate | 2023 |
| LE Holloway Property Two Ltd | Real estate | 2023 |
| LE Jardin Management Company Limited | Households | 2009 |
| LE Pont Ltd | Hospitality | 2023 |
| LE PRÉ Catelan Limited | Professional & scientific | 2020 |
| LEA Grill Ltd | Hospitality | 2024 |
| Lead Consultants Limited | Professional & scientific | 2014 |
| Leader Consulting Limited | Professional & scientific | 2017 |
| Leaders of ALL Nations International Community Interest Company | Other services | 2016 |
| Leadership IS YOU Limited | Education | 2025 |
| Leading Impressions Limited | Professional & scientific | 2020 |
| Leading Point Financial Markets Ltd | Information & communication | 2016 |
| Leading Two Ltd | Hospitality | 2025 |