| Lifestyle Residences Limited | Construction | 2016 |
| Light Collective Ltd | Professional & scientific | 2008 |
| Lightbringer Solutions Ltd | Professional & scientific | 2013 |
| Lightr Lighting Design Limited | Professional & scientific | 2025 |
| Lightrunners Productions Ltd | Professional & scientific | 2014 |
| Lili Design Limited | Construction | 2011 |
| Liliya's Cleaning Services Ltd | Administrative & support | 2026 |
| Lill Accounting Ltd | Professional & scientific | 2012 |
| Lilly Palmer Ltd | Information & communication | 2020 |
| Lillyhall Properties Limited | Administrative & support | 2010 |
| Lily Property Investment Limited | Real estate | 2021 |
| Lily Sylvestre Limited | Professional & scientific | 2019 |
| Limilia Ltd | Wholesale & retail | 2019 |
| Lindsay JAY Fit Ltd | Education | 2024 |
| Lingerie Bowl Ltd | Arts & recreation | 2021 |
| Lingmotion Ltd | Education | 2025 |
| Lingualumi Ltd | Information & communication | 2025 |
| Link Chinese Limited | Education | 2005 |
| Linkglobal Ltd | Wholesale & retail | 2025 |
| Linlin Beauty Ltd | Other services | 2024 |
| Linnebank Ltd | Professional & scientific | 2023 |
| Linnovate Ltd | Health & social care | 2023 |
| Lion Corporate Services Limited | Administrative & support | 1998 |
| Lionlockx Lion Lockx Ltd. | Information & communication | 2017 |
| LIS Investments Ltd | Real estate | 2022 |
| Lisa (Rossendale) Limited | Real estate | 2020 |
| Lisa Lucas Ltd | Information & communication | 2022 |
| Lisa Marie Designs Limited | Professional & scientific | 2014 |
| Lisavin Consulting Limited | Professional & scientific | 2011 |
| Listeh Ltd | Real estate | 2025 |
| Listorg Ltd | Real estate | 2025 |
| Litedrive Limited | Manufacturing | 2024 |
| Lithos Investments Limited | Real estate | 2024 |
| Little Bird Press Limited | Arts & recreation | 2013 |
| Little Black Limited | Wholesale & retail | 2018 |
| Little Brown Monkey Limited | Professional & scientific | 2002 |
| Little Georges Ltd | Education | 2010 |
| Little Hunan Ltd | Hospitality | 2019 |
| Little Troopers Day Nursery Limited | Other services | 2006 |
| Little Writing Company Limited | Education | 2019 |
| Live 8 Limited | Extraterritorial | 2005 |
| Live Sound Services Ltd | Information & communication | 2011 |
| Liveforce Ltd | Information & communication | 2017 |
| Livid Dare Limited | Real estate | 2014 |
| Livsell UK Ltd | Hospitality | 2020 |
| Lizzie James Ltd | Arts & recreation | 2021 |
| Lksconsulting Ltd | Information & communication | 2012 |
| LKW Solutions Limited | Manufacturing | 2017 |
| Llinn Ltd | Information & communication | 2024 |
| Lloyd Herman Ltd | Construction | 2019 |
| LMK Marketing Consultancy Ltd | Professional & scientific | 2008 |
| Lmkm Ltd | Information & communication | 2020 |
| Lobins Limited | Wholesale & retail | 1994 |
| Local Heroes PVT Ltd | Wholesale & retail | 2026 |
| Lockes Field Management Company Limited | Households | 1986 |
| Lockview Business Services Limited | Professional & scientific | 2001 |
| Lofty Llama Ltd | Professional & scientific | 2022 |
| Logantech Consulting Ltd | Information & communication | 2023 |
| Logical Acquisitions Ltd | Administrative & support | 2009 |
| Logicfix Ltd | Wholesale & retail | 2024 |
| Lojj Limited | Real estate | 2015 |
| LON Flow Ltd | Information & communication | 2025 |
| London AD Ltd | Information & communication | 2022 |
| London Beauty Clinic Ltd | Other services | 2023 |
| London Bronze Casting Limited | Manufacturing | 2014 |
| London Building Solutions Ltd | Construction | 2012 |
| London Central Construction Limited | Construction | 2024 |
| London Church International | Other services | 2002 |
| London Consulting Centre Ltd. | Real estate | 2014 |
| London Dental Academy Ltd | Health & social care | 2016 |
| London Derm Ltd | Health & social care | 2019 |
| London Drylining and Soundproofing Ltd | Construction | 2009 |
| London Executive Living Limited | Real estate | 2021 |
| London Executive Training Ltd | Education | 2024 |
| London Five Star Limited | Wholesale & retail | 2022 |
| London Fruits and VEG Ltd | Wholesale & retail | 2023 |
| London Horror Comic Ltd | Information & communication | 2007 |
| London Insurance Academy Limited | Financial services | 2012 |
| London Karate Limited | Arts & recreation | 2001 |
| London Konnekt Services Ltd | Administrative & support | 2022 |
| London Korean Music Academy | Education | 2023 |
| London Laboratory Equipment Ltd | Wholesale & retail | 2018 |
| London Law IDV Limited | Extraterritorial | 2025 |
| London Law Limited | Professional & scientific | 1990 |
| London Law Secretarial Limited | Administrative & support | 1989 |
| London Law Services Limited | Administrative & support | 1989 |
| London Orthotic Consultancy Consolidated Ltd | Financial services | 2024 |
| London Perfect Plastering Ltd | Construction | 2026 |
| London Property Search Limited | Real estate | 2023 |
| London Railway Consultancy Limited | Professional & scientific | 2013 |
| London School of Artificial Intelligence Ltd | Information & communication | 2026 |
| London School of Supernatural Ministry | Education | 2013 |
| London Skolars Limited | Arts & recreation | 2002 |
| London Strings Ltd | Arts & recreation | 2023 |
| London Tiramisu Limited | Hospitality | 2024 |
| London Vintage Limited | Wholesale & retail | 2026 |
| Londonfurs Management Ltd | Other services | 2012 |
| London’S Local Chambers Limited | Other services | 2021 |
| Long Mill Consultants Limited | Professional & scientific | 2025 |
| Longview London Limited | Real estate | 2020 |