| Living Enzimes Limited | Households | 2024 |
| Living for Learning Limited | Information & communication | 2007 |
| LJ & G Property Limited | Real estate | 2021 |
| LJ Engineering Consultancy Ltd | Professional & scientific | 2023 |
| LJP Promotions Limited | Real estate | 2013 |
| LK Family Express Ltd | Wholesale & retail | 2021 |
| LK House Ltd | Wholesale & retail | 2024 |
| LKH Electrical Services Ltd | Construction | 2024 |
| LKL Car Hire Ltd | Transport & logistics | 2024 |
| Llexan International Limited | Wholesale & retail | 2001 |
| LMR Enterprise Ltd | Professional & scientific | 2021 |
| LMS Meridian Ltd | Wholesale & retail | 2022 |
| LMS Sheridans Ltd | Real estate | 1999 |
| Lmxled Limited | Wholesale & retail | 2013 |
| LMY Limited | Wholesale & retail | 2018 |
| LNE Electrical Ltd | Construction | 2022 |
| LOC8UM Ltd | Administrative & support | 2017 |
| Local Brickwork Ltd | Construction | 2019 |
| Local Savers Ltd | Wholesale & retail | 2023 |
| Local Windscreen Services Limited | Wholesale & retail | 2018 |
| Localhub Limited | Administrative & support | 2013 |
| Locate and Resolve Ltd | Construction | 2025 |
| Lockbridge Court Management Company Limited | Households | 1989 |
| Locksbridge Capital Limited | Financial services | 2011 |
| Locksbridge Developments (Braintree) Limited | Real estate | 2018 |
| Locksbridge Developments Limited | Construction | 2011 |
| Loco Design London Ltd | Professional & scientific | 2022 |
| Locum Healthcare Ltd | Health & social care | 2019 |
| LOD Property Limited | Professional & scientific | 2024 |
| Loftspec Ltd | Construction | 2021 |
| Logevision Ltd | Information & communication | 2021 |
| Logic School of Motoring Ltd | Other services | 2009 |
| Logicsage Ltd | Information & communication | 2014 |
| Logistic Build Ltd | Construction | 2022 |
| Logixal Document Solutions Holdings Limited | Financial services | 2021 |
| Logixal Document Solutions Limited | Information & communication | 2011 |
| Logixal Voice & Data Solutions Limited | Information & communication | 2014 |
| Logos Heart Care Ltd | Health & social care | 2019 |
| Logwin Air + Ocean UK Limited | Transport & logistics | 1981 |
| Lomaculo Limited | Health & social care | 2013 |
| Lonbud Ltd | Construction | 2026 |
| London Academy of Business and Management Ltd | Professional & scientific | 2019 |
| London Atlantic Ltd | Other services | 2014 |
| London Beverages Limited | Hospitality | 2020 |
| London Chauffeur Hire Ltd | Transport & logistics | 2019 |
| London Clinicare Limited | Wholesale & retail | 2013 |
| London Constructions & Designs Ltd | Construction | 2018 |
| London Counties Party Wall Surveyors Ltd | Professional & scientific | 2018 |
| London Coworks Limited | Real estate | 2018 |
| London Curry Club Ltd | Professional & scientific | 2025 |
| London Empire Hotel Ltd | Hospitality | 2023 |
| London Empire Organisation Ltd | Other services | 2026 |
| London Expert Orthopaedics Ltd | Education | 2019 |
| London Fire Inspections Ltd | Public administration | 2022 |
| London Gems & Jewelry Limited | Wholesale & retail | 2022 |
| London Gourmet Ltd | Manufacturing | 2024 |
| London Hospitality Ltd | Hospitality | 2025 |
| London Ideas UK Limited | Administrative & support | 2024 |
| London Law Chambers Ltd | Professional & scientific | 2019 |
| London Longevity Medicine Ltd | Health & social care | 2025 |
| London LUX Transfer Ltd | Transport & logistics | 2024 |
| London Media Lounge Limited | Information & communication | 2020 |
| London Motorcycle Parts Ltd | Wholesale & retail | 2019 |
| London Next Ltd | Manufacturing | 2018 |
| London Nexus Chauffeurs Ltd | Transport & logistics | 2025 |
| London OHM Improvements Ltd | Construction | 2022 |
| London Organic Day Nurseries Limited | Education | 2011 |
| London P&P Fashion Ltd | Wholesale & retail | 2025 |
| London Paint Company Limited | Construction | 2016 |
| London Palette Ltd | Information & communication | 2026 |
| London Perishable Limited | Wholesale & retail | 2020 |
| London Plastic and Windows Ltd | Other services | 2020 |
| London Prestige Cars Recovery Ltd | Wholesale & retail | 2022 |
| London Prestige Property Ltd | Construction | 2026 |
| London Prestige Transfers Limited | Transport & logistics | 2025 |
| London Private Chauffeurs Limited | Transport & logistics | 2013 |
| London Rapid Repair Ltd | Construction | 2025 |
| London Research & Development Organisation Ltd | Information & communication | 2023 |
| London Rides Ltd | Administrative & support | 2017 |
| London Screwbase Limited | Construction | 2024 |
| London Speech and Language Therapy Limited | Health & social care | 2014 |
| London Square (Bugsby Way) Holdings Limited | Financial services | 2021 |
| London Square (Crayford) Holdings Limited | Financial services | 2023 |
| London Square (Crayford) Limited | Construction | 2023 |
| London Square (Crimscott Street) Limited | Construction | 2013 |
| London Square (Holdings) Limited | Financial services | 2010 |
| London Square (Investments) Limited | Financial services | 2011 |
| London Square (Projects) Limited | Construction | 2011 |
| London Square (Putney) Limited | Construction | 2011 |
| London Square (RSG) Limited | Construction | 2012 |
| London Square (Springfield) Holdings Limited | Financial services | 2023 |
| London Square (Springfield) Limited | Construction | 2023 |
| London Square (Staines) Limited | Construction | 2015 |
| London Square (Streatham) Limited | Construction | 2013 |
| London Square (Walton-On-Thames) Holdings Ltd | Financial services | 2018 |
| London Square (Walton-On-Thames) Ltd | Construction | 2018 |
| London Square (West Croydon) Holdings Limited | Financial services | 2020 |
| London Square (West Croydon) Limited | Construction | 2019 |
| London Square Devco 2 Limited | Construction | 2025 |
| London Square Devco Limited | Construction | 2021 |