| Lami Auto Ltd | Wholesale & retail | 2020 |
| Lamrose Properties Limited | Real estate | 2002 |
| Lantis Venture Limited | Real estate | 2025 |
| Larrie Lems Ltd | Hospitality | 2018 |
| Laswon Traders Limited | Construction | 2023 |
| Latour Limited | Administrative & support | 2010 |
| Launear OY Limited | Financial services | 2025 |
| Lavim Ltd | Construction | 2025 |
| Lawn Lane Newsagent Ltd | Wholesale & retail | 2022 |
| Lawyers Limited | Professional & scientific | 1995 |
| Laxmi Developers Limited | Construction | 2022 |
| Layan Consultancy Limited | Other services | 2018 |
| Lbright Oxford Academy Ltd | Education | 2025 |
| LE Grande Waffle Co. | | 2006 |
| Lean on ME Community Care Services Ltd | Health & social care | 2004 |
| Leart Properties Ltd | Real estate | 2019 |
| Lebanese Fine Wines Limited | Wholesale & retail | 2010 |
| Ledgercraft UK Limited | Professional & scientific | 2026 |
| Legacy Car Sales Ltd | Wholesale & retail | 2022 |
| Leilah Ortiz Ltd | Wholesale & retail | 2023 |
| Leke Construction Limited | Construction | 2017 |
| Lemaya Ltd | Professional & scientific | 2025 |
| Leopard UK Properties Ltd | Real estate | 2018 |
| LESCO88 Ltd | Wholesale & retail | 2019 |
| Less 2 More Ltd | Financial services | 2020 |
| Leti Construction Ltd | Administrative & support | 2021 |
| Letoon Capital Ltd | Professional & scientific | 2023 |
| Levish Enterprise Ltd | Wholesale & retail | 2025 |
| Lewis Capital Accounting Ltd | Financial services | 2021 |
| Lexendo Ltd | Information & communication | 2026 |
| Lexi Construction Services Ltd | Construction | 2025 |
| Lexquisite Ltd | Wholesale & retail | 2024 |
| Liam Deehan Haulage Limited | Transport & logistics | 2021 |
| Libena Limited | Construction | 2025 |
| Lidder Property Co Ltd | Real estate | 2018 |
| Lifeline Accounting Services Limited | Professional & scientific | 2025 |
| Lifestyled Homes Ltd | Real estate | 2023 |
| Light 4 Life | Health & social care | 2006 |
| Light Boost Ltd | Wholesale & retail | 2021 |
| Light Trick Electrical Limited | Construction | 2015 |
| Liliana Bivol Limited | Real estate | 2026 |
| Lilium Care Ltd | Administrative & support | 2023 |
| Lima Homes Ltd | Real estate | 2025 |
| Limbus Tech Ltd | Information & communication | 2024 |
| Limestone Ltd | Administrative & support | 2024 |
| Limpiezaservices Ltd | Administrative & support | 2025 |
| Ling Commercials Ltd | Financial services | 2016 |
| Links Family Investment Limited | Financial services | 2026 |
| Links Gardening Ltd | Administrative & support | 2021 |
| LIO Construction Ltd | Construction | 2022 |
| Lion Smiths Ltd | Wholesale & retail | 2025 |
| Lioness Ventures Ltd | Real estate | 2025 |
| Lions Media Ltd | Information & communication | 2022 |
| Little Hearts Childcare Ltd | Health & social care | 2021 |
| Living&Giving Ltd | Administrative & support | 2018 |
| Liya Homes Ltd | Real estate | 2024 |
| LJA Express Ltd | Transport & logistics | 2017 |
| Llumbrella Ltd | Professional & scientific | 2023 |
| LND SEO Agency Ltd | Professional & scientific | 2021 |
| LNR1 Properties Limited | Real estate | 2024 |
| Loart Ltd | Arts & recreation | 2025 |
| Local Leaflet Promotion HA Ltd | Other services | 2021 |
| Local's Welcome Ltd | Wholesale & retail | 2013 |
| Lockedoutapp Ltd | Information & communication | 2025 |
| Lodevo Ltd | Transport & logistics | 2026 |
| Lods Limited | Wholesale & retail | 2003 |
| Loft Extension Roofing Ltd | Construction | 2023 |
| Loftex London Limited | Construction | 2019 |
| Logic Certification Limited | Education | 2002 |
| Logic Property Partnership Limited | Real estate | 2016 |
| Lolo Foundation Limited | Health & social care | 2018 |
| Lolos Kitchen Limited | Hospitality | 2019 |
| London Bakes and Cakes Limited | Hospitality | 2022 |
| London Boss UK Ltd | Financial services | 2025 |
| London Engineering Services Ltd | Construction | 2015 |
| London Film Holding Ltd | Wholesale & retail | 2018 |
| London Homes Management Ltd | Real estate | 2019 |
| London Kreatives Ltd | Information & communication | 2018 |
| London NM Construction Ltd | Construction | 2025 |
| London Parcel Services Ltd | Transport & logistics | 2025 |
| London Prime Apartment Ltd | Real estate | 2025 |
| London Proprietors Real Estate Ltd | Real estate | 2019 |
| London Rewire Electrical Services Ltd | Construction | 2024 |
| London Zone Ltd | Wholesale & retail | 2024 |
| Londongrad VIP Ltd | Transport & logistics | 2014 |
| Londres Tour Turismo Ltd | Administrative & support | 2020 |
| Lonles Ltd | Wholesale & retail | 2021 |
| Loquacious Media Ltd | Information & communication | 2021 |
| Loquimur Ltd | Hospitality | 2012 |
| Lori Properties Ltd | Real estate | 2020 |
| Lotus (SSL Healthcare) Ltd | Health & social care | 2021 |
| Lotus Accountancy Ltd | Professional & scientific | 2021 |
| Lotus Care (ASH Cottage) Limited | Health & social care | 2015 |
| Lotus Care (Ellerslie Court) Limited | Health & social care | 2016 |
| Lotus Care (North) Limited | Health & social care | 2023 |
| Lotus Care Anchorage Ltd | Health & social care | 2024 |
| Lotus Care Brandon Lodge Ltd | Health & social care | 2024 |
| Lotus Care Croxteth Park Ltd | Health & social care | 2024 |
| Lotus Care High LEA House Ltd | Health & social care | 2024 |
| Lotus Care Kingswood Manor Ltd | Health & social care | 2024 |