| Lgns Property Investment Ltd | Real estate | 2020 |
| Lidwina Prado Limited | Other services | 2014 |
| Liebchen Ltd | Wholesale & retail | 2023 |
| Lifestyle Press Limited | Information & communication | 2004 |
| Lift With Aria Ltd | Other services | 2025 |
| Light Exponent Ltd | Information & communication | 2018 |
| Lighthouse Beacon Ltd | Construction | 2016 |
| Lighting Partners London Ltd | Wholesale & retail | 2015 |
| Lilely ENT Ltd | Information & communication | 2023 |
| Lilly London Services Ltd | Construction | 2019 |
| Limegrove Consulting Ltd | Financial services | 2021 |
| Limitless Coaching Ltd | Professional & scientific | 2011 |
| Limitless Independent Films Ltd | Information & communication | 2025 |
| Limitless Tennis Limited | Education | 2019 |
| Line of Roses Ltd | Wholesale & retail | 2015 |
| Link Locums Ltd | Health & social care | 2012 |
| Lion Group Management Ltd | Financial services | 2024 |
| Lion Property Hub Ltd | Real estate | 2024 |
| Liquid Gold Consultancy Ltd | Professional & scientific | 2026 |
| Little Artists Ltd | Education | 2026 |
| Little Oliver Ltd | Wholesale & retail | 2025 |
| Little Smart Courier Ltd | Transport & logistics | 2018 |
| Liyekri Ltd | Transport & logistics | 2020 |
| LJ Technology Solutions Limited | Information & communication | 2019 |
| LKS Driving Ltd | Real estate | 2023 |
| LKS Morden Ltd | Hospitality | 2024 |
| Lleson Studios Ltd | Wholesale & retail | 2023 |
| Lloyd Creative Ltd | Professional & scientific | 2015 |
| LMB Investments (UK) Limited | Wholesale & retail | 2014 |
| LMS07 Ltd | Manufacturing | 2012 |
| LO Hair Ltd | Wholesale & retail | 2018 |
| Local House Movers Ltd | Transport & logistics | 2025 |
| Locked & Ledgered Ltd | Professional & scientific | 2025 |
| Logosew Limited | Manufacturing | 2018 |
| Lok-Tek Logistics London Ltd | Transport & logistics | 2023 |
| Lokali Digital Ltd | Professional & scientific | 2017 |
| London & South West Properties Limited | Real estate | 1997 |
| London 2012 Developments Limited | Construction | 2005 |
| London Academy of Digital Marketing Ltd | Education | 2025 |
| London and London Books Ltd | Professional & scientific | 2023 |
| London and Surrey Renewables. Ltd | Construction | 2023 |
| London Autos and Repairs Ltd | Wholesale & retail | 2023 |
| London Bathroom Design Company Ltd | Construction | 2025 |
| London Building Repair and Maintenance Ltd | Construction | 2020 |
| London Cars Hire Ltd | Transport & logistics | 2019 |
| London Cars Minicab Ltd | Transport & logistics | 2017 |
| London City Assets Ltd | Real estate | 2023 |
| London Direct Limited | Wholesale & retail | 2016 |
| London Driver Ltd | Transport & logistics | 2025 |
| London Eco Cleaners Limited | Administrative & support | 2008 |
| London Extensions Specialist Ltd | Construction | 2025 |
| London Fashion House (LFH) Limited | Wholesale & retail | 2017 |
| London Home Refurbishment and Extensions Ltd | Construction | 2009 |
| London Investment Property Ltd | Real estate | 2020 |
| London Link Private Hire Ltd | Transport & logistics | 2026 |
| London Quick Car Sales Limited | Wholesale & retail | 2024 |
| London Riders Ltd | Administrative & support | 2015 |
| London Road Residence Ltd | Real estate | 2025 |
| London Safety Certificates Limited | Construction | 2018 |
| London Secure Guard Ltd | Administrative & support | 2025 |
| London Skies Ltd | Financial services | 2022 |
| London Space Ltd | Real estate | 2024 |
| London Tamil Marketing Ltd | Health & social care | 2026 |
| London Timber Windows and Doors Ltd | Other services | 2016 |
| London Vape 1 Ltd | Wholesale & retail | 2025 |
| London Wealth Box Limited | Professional & scientific | 2024 |
| London ZIP Ltd | Wholesale & retail | 2018 |
| LOP Foods Ltd | Hospitality | 2019 |
| Lopoconstruction Limited | Construction | 2020 |
| Lords Global Ltd | Wholesale & retail | 2021 |
| Lorentzo.Utu Ltd | Construction | 2017 |
| Loreta Ltd | Construction | 2019 |
| Lorin Raphael Cakes Ltd | Wholesale & retail | 2023 |
| Lothar M10 Limited | Professional & scientific | 2023 |
| Loudon INT Ltd | Other services | 2024 |
| Loue Realty Holding Ltd | Financial services | 2024 |
| Loue Realty Property Investment Ltd | Real estate | 2024 |
| Loujaine Pastry Co Ltd | Manufacturing | 2024 |
| Louxes Ltd | Wholesale & retail | 2019 |
| Love My Range (LMR) Limited | Wholesale & retail | 2024 |
| LOVE2LOVE Lingerie Ltd | Wholesale & retail | 2020 |
| LOW Price Limited | Wholesale & retail | 2004 |
| Lower Morden Equestrian Centre Ltd | Agriculture & fishing | 2021 |
| Loyal Driving School Ltd | Education | 2024 |
| LPD Cars Ltd | Transport & logistics | 2018 |
| LPD Trading Ltd | Transport & logistics | 2016 |
| LRW Group Ltd | Information & communication | 2024 |
| LRY Executive Ltd | Transport & logistics | 2025 |
| LSW (Chepstow) Limited | Construction | 2017 |
| Ltech Electrical Ltd | Construction | 2024 |
| LTM Groups Limited | Wholesale & retail | 2025 |
| Luaur Group Ltd | Professional & scientific | 2022 |
| Lucia Healthcare London Limited | Health & social care | 2015 |
| Lucky Loots Ltd | Wholesale & retail | 2026 |
| Lucky Spot Competition Ltd | Construction | 2021 |
| Lucky Wheels Ltd | Transport & logistics | 2025 |
| Lucy Electrical Limited | Professional & scientific | 2003 |
| Luigi Italiano Limited | Hospitality | 2011 |
| Lumaspace Ltd | Real estate | 2025 |
| Lume and Leaf Ltd | Wholesale & retail | 2017 |