| Lauren Brady Money Matters Ltd | Professional & scientific | 2024 |
| Lauren JAY Paris Ltd | Wholesale & retail | 2022 |
| Laurence Supply Co. (Leather Goods) Limited | Wholesale & retail | 1975 |
| Lavelle Clinic ( Glasgow ) Ltd | Health & social care | 2024 |
| Lavelle Clinic (Bradford) Ltd | Health & social care | 2022 |
| Lavelle Clinic Blackburn Ltd | Health & social care | 2023 |
| Lavelle Clinic Ltd | Health & social care | 2020 |
| Lavelle Waste Services Limited | Other services | 2016 |
| Lavender Court (Westhoughton) RTM Company Ltd | Households | 2020 |
| Lavender Property Management Limited | Real estate | 2024 |
| Lavendor Properties Ltd | Real estate | 2021 |
| Lavish Hair and Beauty NW Ltd | Other services | 2025 |
| Lavish House Ltd | Construction | 2018 |
| Lavz Media Ltd | Professional & scientific | 2022 |
| Law Microbiology Consulting Limited | Professional & scientific | 2022 |
| Law School Compass Limited | Education | 2024 |
| Lawrence F Consulting Limited | Professional & scientific | 2026 |
| Lawrence Health Group Ltd | Health & social care | 2026 |
| Lawrence Health Ltd | Health & social care | 2025 |
| Lawson 16 Ltd | Real estate | 2024 |
| Lawson FOX & Company Ltd | Professional & scientific | 2026 |
| Lawson FOX Associates Ltd | Professional & scientific | 2025 |
| Lawson FOX Debt Solutions Ltd | Financial services | 2010 |
| Lawson FOX Group Limited | Professional & scientific | 2019 |
| Lawson FOX Partners Ltd | Professional & scientific | 2025 |
| Lawson James Services Limited | Information & communication | 2016 |
| Lawton Court (Leigh) Management Company Limited | Households | 2005 |
| Lawton Lawyers Limited | Professional & scientific | 2010 |
| LAX Properties NW Limited | Real estate | 2022 |
| Lay-Space Ltd Limited | Manufacturing | 2025 |
| Layl Cafe Ltd | Hospitality | 2025 |
| Layla Aesthetics Ltd | Other services | 2025 |
| Layla Ltd | Information & communication | 2019 |
| Layrish Limited | Wholesale & retail | 2025 |
| Lazara Ltd | Transport & logistics | 2008 |
| LB Hub Limited | Other services | 2025 |
| LB Nightlife Ltd | Administrative & support | 2022 |
| LB Physiotherapy Limited | Health & social care | 2018 |
| LB22 Ltd | Financial services | 2025 |
| LBH Accountancy Services Limited | Professional & scientific | 2005 |
| LBH Maritime Ltd | Education | 2018 |
| LBL Fascia & Soffits Ltd | Administrative & support | 2024 |
| LBL Roofing Ltd | Construction | 2024 |
| LBW Consultants Limited | Professional & scientific | 2014 |
| LBW Property Ltd | Real estate | 2024 |
| Lbww Limited | Financial services | 2005 |
| LBX Holdings Limited | Financial services | 2025 |
| LC Equipment & Supplies Ltd | Administrative & support | 2023 |
| LC Fire Protection UK Ltd | Construction | 2023 |
| LC Group Holdings Ltd | Financial services | 2023 |
| LC Joinery, Building & Electrical Ltd | Construction | 2025 |
| LC Pereira Property Ltd | Real estate | 2022 |
| LCL Flooring Ltd | Wholesale & retail | 2024 |
| Lcsv Limited | Health & social care | 2014 |
| LCT Creative Limited | Administrative & support | 2016 |
| LD Cleworth & Sons Limited | Administrative & support | 2014 |
| LD Logistics Ltd | Transport & logistics | 2024 |
| LDG Joinery Ltd | Construction | 2026 |
| Ldnh Solutions Limited | Information & communication | 2025 |
| LDS Sales Guarantees Ltd | Real estate | 2015 |
| LE Papillon Beauty and Aesthetics Academy Ltd | Other services | 2023 |
| LE Petit Paper Company Limited | Manufacturing | 2023 |
| LE Valen Limited | Wholesale & retail | 2022 |
| LE Wolf Properties Limited | Real estate | 2024 |
| Le-And Homes Limited | Real estate | 2025 |
| LEA Scaffolding and Access Limited | Construction | 2018 |
| Leabrook Garden Centre Limited | Wholesale & retail | 2014 |
| Leach Trading Ltd | Wholesale & retail | 2023 |
| Lead Alpha Solutions Ltd | Wholesale & retail | 2025 |
| Lead Drive Limited | Professional & scientific | 2025 |
| Lead Energy Consultancy Ltd | Professional & scientific | 2026 |
| Lead GEN Supermarket Ltd | Information & communication | 2024 |
| Lead Navigator Limited | Professional & scientific | 2024 |
| Lead Property Solutions Limited | Real estate | 2020 |
| Lead Soulfully Limited | Administrative & support | 2024 |
| Leaders Garage Ltd | Wholesale & retail | 2025 |
| Leadership Future Limited | Professional & scientific | 2017 |
| Leading Edge Supplies Ltd | Transport & logistics | 2016 |
| Leading Ladies Limited | | 1985 |
| Leading Medical Services Limited | Health & social care | 2022 |
| Leading Secretly Ltd | Information & communication | 2025 |
| Leadsuk Ltd | Financial services | 2017 |
| Leaf Bean POD Ltd | Hospitality | 2021 |
| Leafield Gardening Services Limited | Other services | 2014 |
| Leafletfrog Limited | Manufacturing | 2012 |
| Leafshade Consulting Limited | Information & communication | 2019 |
| Leagate Developments Ltd | Construction | 2025 |
| Lean AM Ltd | Professional & scientific | 2016 |
| Lean Into Learning Ltd | Professional & scientific | 2023 |
| Leap Brio Ltd | Construction | 2020 |
| Leap N Link Limited | Wholesale & retail | 2010 |
| Lear the Film Limited | Information & communication | 2016 |
| Learners Bay Limited | Education | 2016 |
| Learning Cubs Bolton Ltd | Education | 2022 |
| Learning Quran Academy Ltd | Education | 2024 |
| Learning Stages Ltd | Arts & recreation | 2024 |
| Learning Through Motion Ltd | Education | 2025 |
| Learning to Inspire Limited | Education | 2003 |
| Learning Xpress Limited | Extraterritorial | 2018 |
| Leather Connection Limited | Manufacturing | 2003 |