| Last Interiors Ltd | Professional & scientific | 2020 |
| Last Mile Water Limited | Water & waste | 2016 |
| Laszlo Transport Limited | Transport & logistics | 2012 |
| Late Apex Films Ltd | Information & communication | 2018 |
| Lately Music Ltd | Wholesale & retail | 2021 |
| Latentconnect Ltd | Information & communication | 2025 |
| Lateo Solutions Limited | Professional & scientific | 2014 |
| Later Life Planning Consultants Ltd | Other services | 2018 |
| Latham Bros Holdings Limited | Professional & scientific | 2010 |
| Latham Construction South Wales Limited | Construction | 2013 |
| Latham Properties Limited | Real estate | 1993 |
| Latham Property Holdings Ltd | Real estate | 2024 |
| Lathe to the Grave Limited | Information & communication | 2017 |
| Latif Advo Ltd | Professional & scientific | 2024 |
| Latif Films Limited | Administrative & support | 2024 |
| Latif Industries Ltd | Wholesale & retail | 2020 |
| Latifa Cleaning Services Ltd | Administrative & support | 2019 |
| Latitude Holdings Ltd | Information & communication | 2026 |
| Latrad Limited | Professional & scientific | 2011 |
| Lattice Build Technology Limited | Information & communication | 2021 |
| Lattice Computing Limited | Manufacturing | 2026 |
| Latymer Solutions Limited | Professional & scientific | 2024 |
| Laughing Buddha Builders Ltd | Construction | 2019 |
| Laulax Ltd | Wholesale & retail | 2012 |
| Launchbd Ltd | Professional & scientific | 2019 |
| Launcher Digital Limited | Information & communication | 2022 |
| Laundry Quarter (Cardiff) Limited | Households | 2022 |
| Laura DUO Ltd | Wholesale & retail | 2025 |
| Laura MAY Bridal Ltd | Wholesale & retail | 2009 |
| Laurasia Consulting Ltd | Professional & scientific | 2019 |
| Laurasia Erythraen Periplus Ltd | Professional & scientific | 2021 |
| Laurcox Trade Ltd | Wholesale & retail | 2026 |
| Laurean Transport Limited | Construction | 2019 |
| Laurel Intellectual Property Ltd. | Administrative & support | 2015 |
| Laurel Landscapes (UK) Limited | Administrative & support | 2016 |
| Laurel Private Investment Limited | Financial services | 2016 |
| Lauren Townsend Limited | Wholesale & retail | 2017 |
| Laurens Tattoo Parlour Limited | Arts & recreation | 2024 |
| Laurentum Construction Ltd | Construction | 2018 |
| Laurias Ltd | Real estate | 2017 |
| Lautrans Ltd | Transport & logistics | 2014 |
| Lava Catering Ltd | Wholesale & retail | 2025 |
| LAVA90 Ltd | Hospitality | 2025 |
| Lavat Commerce Ltd | Wholesale & retail | 2023 |
| Lavdosi Solutions Ltd | Wholesale & retail | 2021 |
| Lavent Ltd | Professional & scientific | 2022 |
| Lavery Marine Services Ltd | Transport & logistics | 2018 |
| Lavie Biotech Ltd | Extraterritorial | 2021 |
| Laville Luxury Ltd | Hospitality | 2025 |
| Lavin Rose Ltd | Hospitality | 2017 |
| Lavish Academy Limited | Other services | 2026 |
| Lavish Beauty Clinic Ltd | Other services | 2025 |
| Lavish Boutique Limited | Wholesale & retail | 2026 |
| Lavish Children's Ware Limited | Wholesale & retail | 2026 |
| Lavish Nails & Spa Ltd | Other services | 2024 |
| Lavited Ltd | Administrative & support | 2019 |
| Law & Business Worldwide Management Ltd | Professional & scientific | 2015 |
| Law Healthcare Limited | Health & social care | 2019 |
| Law Works Ltd | Professional & scientific | 2020 |
| Law-Fix Automotive Ltd | Wholesale & retail | 2025 |
| Lawalex Ltd | Professional & scientific | 2014 |
| Lawdroid Limited | Information & communication | 2018 |
| Lawhchue Mart Ltd | Wholesale & retail | 2025 |
| Lawk Pizza Ltd | Hospitality | 2022 |
| Lawn and Weed Expert 2024 Limited | Administrative & support | 2024 |
| Lawn and Weed Expert Limited | Administrative & support | 2026 |
| Lawray Holdings Limited | Financial services | 2022 |
| Lawray Limited | Professional & scientific | 1992 |
| Lawrence International Trade Ltd | Wholesale & retail | 2024 |
| Lawswood Claims Ltd | Administrative & support | 2019 |
| Lawswood International Ltd | Professional & scientific | 2018 |
| Lawten Property Limited | Construction | 2022 |
| LAX Builders Ltd | Construction | 2026 |
| Laxton Wholesale Ltd | Wholesale & retail | 2021 |
| Layaura Ltd | Arts & recreation | 2025 |
| Layer Stone Limited | Construction | 2019 |
| LAYER21 Ltd | Wholesale & retail | 2023 |
| Layhaco Ltd | Wholesale & retail | 2025 |
| Layota Ltd | Professional & scientific | 2013 |
| Laytel Limited | Information & communication | 2017 |
| Layth 149 Limited | Real estate | 2019 |
| Lazarou Brothers Barber Shop Ltd | Other services | 2013 |
| Lazarou Hair Salons Birchgrove Ltd | Other services | 2018 |
| Lazawa Ltd | Education | 2025 |
| Lazdans AI Limited | Information & communication | 2025 |
| Lazer Beam Productions Ltd | Information & communication | 2015 |
| Lazika Ltd | Information & communication | 2025 |
| Laziz Shawarma Ltd | Hospitality | 2019 |
| Laziza Take Away Ltd | Hospitality | 2024 |
| LAZIZA2 Shawarma Ltd | Hospitality | 2025 |
| Lazkong Tech Limited | Wholesale & retail | 2022 |
| Lazsoftfit Ltd | Wholesale & retail | 2025 |
| Lazy Bear Lodge Ltd | Hospitality | 2021 |
| LB IT Solutions Ltd | Information & communication | 2018 |
| LB Suisse UK Ltd | Wholesale & retail | 2021 |
| LB Wholesale Limited | Wholesale & retail | 2020 |
| Lbabah Motors Ltd | Administrative & support | 2019 |
| LBB Haulage Ltd | Transport & logistics | 2019 |
| LBF SW Ltd | Real estate | 2024 |
| LBG Healthcare Limited | Health & social care | 2014 |