| LMB Property Holdings Ltd | Real estate | 2020 |
| LMG Building Services (London) Ltd | Construction | 2016 |
| LMW Talent Management Ltd | Professional & scientific | 2026 |
| Lobesli Co., Ltd | Extraterritorial | 2019 |
| Locmai Ltd | Other services | 2025 |
| Loco Blue Limited | Real estate | 2016 |
| Loco Investments Limited | Real estate | 2016 |
| Loco Management Services Limited | Real estate | 2014 |
| Locomotive Media Ltd | Information & communication | 2010 |
| Loft & Roof Experts Limited | Construction | 2013 |
| Logistix 365 Ltd | Transport & logistics | 2019 |
| Logisy Co., Ltd | Wholesale & retail | 2023 |
| Logrus Consulting Ltd | Information & communication | 2016 |
| Logtech International Co., Ltd | Mining & quarrying | 2015 |
| Logvanish Limited | Information & communication | 2021 |
| Loizou Properties Ltd | Real estate | 2014 |
| Lojistix Consulting Group Ltd | Wholesale & retail | 2025 |
| LOK Chong International Co., Ltd | Extraterritorial | 2017 |
| LOK FU TAK Commercial Company Limited | Extraterritorial | 2020 |
| Loki Bear Ltd | Other services | 2023 |
| Loki Coffee Ltd | Hospitality | 2025 |
| Lola Thai Spa Ltd | Health & social care | 2024 |
| London AAA Limited | Administrative & support | 2013 |
| London Alliance Consulting Ltd | Wholesale & retail | 2022 |
| London Bridge Films Ltd | Information & communication | 2018 |
| London Cardiology and Electrophysiology Limited | Health & social care | 2014 |
| London Centre for Longevity and Metabolic Health Ltd | Health & social care | 2018 |
| London City Island Clinic Limited | Other services | 2024 |
| London Ensemble Limited | Arts & recreation | 2002 |
| London Falconry Limited | Agriculture & fishing | 2017 |
| London Fraud Forum Limited | Other services | 2007 |
| London Guitar Company Ltd | Wholesale & retail | 2019 |
| London Marketing SET Ltd | Education | 2018 |
| London NET Solutions Limited | Administrative & support | 2009 |
| London Osteopathy Limited | Health & social care | 2014 |
| London Project Services Ltd | Construction | 2007 |
| London Road Mitcham Developments Limited | Construction | 2021 |
| London School of Design and Arts UK | Education | 2024 |
| London Self Drive Limited | Professional & scientific | 2004 |
| London Skip Holdings Limited | Financial services | 2013 |
| London Soundtrack Orchestra Ltd | Arts & recreation | 2009 |
| London Tube Scaffolding Limited | Construction | 2018 |
| London Wessler Industry Co., Ltd | Extraterritorial | 2022 |
| London Wind Turbines Limited | Professional & scientific | 2015 |
| London Winner Legend Limited | Wholesale & retail | 2024 |
| London Zhangye Atelier Ltd | Extraterritorial | 2018 |
| Long Crypto Group Limited | Information & communication | 2021 |
| Long Run Research Limited | Information & communication | 2021 |
| Longboom Pacific Limited | Wholesale & retail | 2014 |
| Longbow Trading Limited | Manufacturing | 2023 |
| Longchem Co., Ltd | Wholesale & retail | 2019 |
| Longever Trading Limited | Wholesale & retail | 2025 |
| Longilat Group Co., Ltd | Manufacturing | 2023 |
| Longjiang Circuits Co., Ltd | Extraterritorial | 2013 |
| Longley Group Holdings Limited | Financial services | 2020 |
| Longley Group Limited | Construction | 2011 |
| Longley Stone Premier Homes Limited | Real estate | 2015 |
| Longsheng Aquatic Products Co., Ltd | Extraterritorial | 2013 |
| Longsun Corporation Ltd | Extraterritorial | 2010 |
| Longteng Trading Co., Ltd | Wholesale & retail | 2020 |
| Longtop Ltd | Extraterritorial | 2023 |
| Longwei Hometextile Co., Ltd | Wholesale & retail | 2022 |
| Longy Auto Parts Co., Ltd | Extraterritorial | 2015 |
| Longyin Limited | Professional & scientific | 2024 |
| Longyu Metal Technology Co., Ltd | Extraterritorial | 2018 |
| Lonicera Ltd | Real estate | 2025 |
| Lonna Group Limited | Wholesale & retail | 2022 |
| Lonpart (UK) Electronics Co., Ltd | Extraterritorial | 2018 |
| Lonxia Group Limited | Extraterritorial | 2014 |
| Loong Sails-Uk Limited | Manufacturing | 2014 |
| Loorfees (UK) Co., Ltd | Wholesale & retail | 2024 |
| Lorbens Ltd | Other services | 2007 |
| Lords Blinds and Awnings Limited | Construction | 2019 |
| Lorin Electronics Company Limited | Extraterritorial | 2019 |
| Lorisg Consultants Limited | Professional & scientific | 2014 |
| Lork Group Co., Ltd | Manufacturing | 2024 |
| Lorri Vanni UK Ltd | Wholesale & retail | 2026 |
| LOS Andes Trade Ltd | Extraterritorial | 2015 |
| Losta Lumna Beauty Co., Ltd | Wholesale & retail | 2024 |
| Loto International Trading Co., Ltd | Extraterritorial | 2024 |
| Loughborough Road Freehold Limited | Households | 2012 |
| Louis & Aroma (UK) Ltd | Extraterritorial | 2013 |
| Louise Black Real Estate Ltd | Real estate | 2020 |
| Louise Design Limited | Professional & scientific | 2016 |
| Louise Ward Communications Ltd | Professional & scientific | 2014 |
| Louki Farm Ltd | Agriculture & fishing | 2017 |
| Love Buzz Wedding Planning Ltd | Other services | 2025 |
| Love Innovation Consulting Ltd | Professional & scientific | 2017 |
| Love Local Media London Limited | Professional & scientific | 2024 |
| Love of HIS Glory | Other services | 2011 |
| Loveheart Events Limited | Education | 2016 |
| Lovemami Medical Center | Professional & scientific | 2021 |
| Loving Sprouts Ltd | Wholesale & retail | 2024 |
| Lovio Marketing Management Limited | Wholesale & retail | 2023 |
| Loxor Capital Limited | Financial services | 2015 |
| Loxor Ltd | Financial services | 2007 |
| Loyalty Headwear & Accessories Co., Ltd. | Wholesale & retail | 2017 |
| LP Harman Building Services Ltd | Construction | 2018 |
| LP Harman Homes Ltd | Real estate | 2025 |
| LP Sales Limited | Administrative & support | 2015 |