| London Minibasket Ltd | Education | 2021 |
| London Offices IO Limited | Real estate | 2025 |
| London Pavilion(Uk) Ltd | Real estate | 2023 |
| London Pianos Limited | Wholesale & retail | 2012 |
| London Plastercraft Limited | Manufacturing | 2000 |
| London Regional Commercial Limited | Real estate | 2016 |
| London Regional Housing Limited | Administrative & support | 2010 |
| London Regional Housing Southern Limited | Administrative & support | 2014 |
| London Renew & Refurb Limited | Construction | 2018 |
| London School of Medical & Health Sciences Limited | Education | 2022 |
| London School of Pole Dancing Limited | Arts & recreation | 2016 |
| London Screw Piling Ltd | Construction | 2018 |
| London Smart Ventilation Ltd. | Construction | 2016 |
| London Sofa & Carpet Cleaners Ltd | Administrative & support | 2022 |
| London Soma Ltd | Construction | 2023 |
| London Stage Hire Ltd | Administrative & support | 2018 |
| London UK Events Company Ltd | Arts & recreation | 2013 |
| London Vascular Centre Limited | Health & social care | 2019 |
| Londonpath Professional Services Limited | Health & social care | 2019 |
| Londons Contractors Ltd | Construction | 2025 |
| Londons Real Estate Limited | Real estate | 2018 |
| Long John Silver Ltd | Real estate | 2025 |
| Long Lane Cash & Carry Limited | Wholesale & retail | 2015 |
| Long Paws Alpha Ltd | Manufacturing | 2023 |
| Long Roots Limited | Real estate | 2025 |
| Longbeech Limited | Construction | 1991 |
| Longxing Advertising UK Ltd | Information & communication | 2025 |
| Lonsdale Terrace Developments Limited | Construction | 2025 |
| Look Storage (Southampton) Limited | Transport & logistics | 2024 |
| Lopesproperty Limited | Real estate | 2025 |
| Lorcan Court Management Limited | Real estate | 2007 |
| Lord Byron Investments Limited | Real estate | 2000 |
| Lost Jungle Limited | Extraterritorial | 2026 |
| Lost on Infinity Limited | Professional & scientific | 2008 |
| Lottie Mutton Limited | Wholesale & retail | 2008 |
| Lotus Cafe Limited | Hospitality | 2021 |
| Lotus Contractors Limited | Construction | 2025 |
| Lotus Engineering Services Limited | Professional & scientific | 2023 |
| Lotus Family Investment Ltd | Real estate | 2025 |
| Lotus Fincom Limited | Professional & scientific | 2013 |
| Lotus Hair London Limited | Administrative & support | 2014 |
| Lotus Homes Developments Ltd | Construction | 2025 |
| Lotus Homes Investments Ltd | Real estate | 2023 |
| Lotus Kitchen Ltd | Hospitality | 2021 |
| Loudly Loaded Corner Ltd | Education | 2023 |
| Louella Belle Limited | Wholesale & retail | 2002 |
| Loughrey Construction Limited | Construction | 2017 |
| Louie's Catering of Essex and Hertfordshire Ltd | Hospitality | 2017 |
| Louise Elizabeth Limited | Real estate | 2007 |
| Louise Jones Interiors Limited | Other services | 2001 |
| Louise Solutions Limited | Administrative & support | 2023 |
| Loupe Jewellery Valuation & Consultancy Ltd | Administrative & support | 2016 |
| Lourin Capital Ltd | Financial services | 2014 |
| Lovatt Consulting (London) Ltd | Health & social care | 2014 |
| Love 2 Limited | Wholesale & retail | 2024 |
| Love Corsica Limited | Wholesale & retail | 2022 |
| Love of Nature Ltd | Wholesale & retail | 2021 |
| Love Soul Events Limited | Hospitality | 2025 |
| Love-Hate Social Club Limited | Administrative & support | 2012 |
| Love-Ya-Lox Ltd | Other services | 2022 |
| Loveday Samble Ltd | Arts & recreation | 2025 |
| Lovell Dairys Ltd | Wholesale & retail | 2024 |
| Lowlands Court Management Company Limited | Households | 2003 |
| Lowndes Lodge Management Company Limited | Households | 1986 |
| Lowry Property Investments Ltd | Real estate | 2023 |
| Loy's Beauty Ltd | Other services | 2024 |
| LP Apex Services Limited | Wholesale & retail | 2026 |
| LP Living Ltd | Real estate | 2020 |
| LR Drylining Ltd | Construction | 2023 |
| LR Roofing Contractor Ltd | Construction | 2025 |
| LRO Property Management Limited | Real estate | 2013 |
| LS Acton 1 Ltd | Real estate | 2020 |
| LS Consulting (UK) Limited | Professional & scientific | 2014 |
| Lsca Consultancy Services Limited | Information & communication | 2016 |
| LSJ Investment Holdings Ltd | Real estate | 2019 |
| Lsqvalue Investments Ltd | Other services | 2014 |
| Ltec Electrical Ltd | Construction | 2025 |
| Luca P Construction Limited | Construction | 2014 |
| Lucas Car Services Ltd | Wholesale & retail | 2025 |
| Lucia Modelling Ltd | Other services | 2020 |
| Lucid Lumination Limited | Arts & recreation | 2008 |
| Lucky BEE Care Services Limited | Health & social care | 2023 |
| Lucky Bucks Giveaways Ltd | Other services | 2024 |
| Lucky Charm Entertainment Limited | Wholesale & retail | 2025 |
| Lucky FVG Group Ltd | Wholesale & retail | 2019 |
| Lucky Limited | Real estate | 2024 |
| Lucy Fewell Limited | Administrative & support | 2012 |
| Ludgate Square One Limited | Real estate | 2026 |
| Ludgrove Hall Residents Company Limited | Households | 1999 |
| Ludlow Eyre Legal Ltd | Professional & scientific | 2024 |
| Luftavion Travel & Tours Limited | Administrative & support | 1993 |
| Luke Derrick Ltd | Wholesale & retail | 2021 |
| Luke's Dog School Ltd | Other services | 2022 |
| Lukrative Freehold Talbot Limited | Real estate | 2015 |
| Lula’S Crab Shack Ltd | Hospitality | 2019 |
| Lullaby Baby Sleep Limited | Other services | 2025 |
| Lulu’S Flowers of Hampstead Ltd | Wholesale & retail | 2023 |
| Lumark Development Ltd | Real estate | 2018 |
| Lume Concepts Ltd | Professional & scientific | 2025 |
| Lumiere Wellness & Lifestyle Limited | Health & social care | 2025 |