| LTB Consultants Limited | Information & communication | 2019 |
| LTC Consulting & Services Limited | Professional & scientific | 2018 |
| LTF Consulting Ltd | Administrative & support | 2015 |
| LTJ Estates Ltd | Real estate | 2026 |
| LTW Limited | Administrative & support | 2013 |
| Luana Hanson Design Ltd | Arts & recreation | 2013 |
| Luar Solutions Ltd | Real estate | 2025 |
| Lucarlo Properties Limited | Real estate | 2022 |
| Lucas Steele Racing Ltd | Arts & recreation | 2024 |
| Lucchesi Limited | Health & social care | 2012 |
| Lucian Ciolan Ltd | Transport & logistics | 2019 |
| Lucid Investments Limited | Real estate | 2018 |
| Lucidpath Ltd | Professional & scientific | 2023 |
| Lucienne Suren Limited | Other services | 2017 |
| Lucinda Summers Medicare Limited | Health & social care | 2025 |
| Lucky Bars Ltd | Hospitality | 2026 |
| Lucky Stone 416 Limited | Hospitality | 2025 |
| Lucy B Limited | Administrative & support | 2025 |
| Lucy's (Padgate) Limited | Hospitality | 2025 |
| Lugal Ltd | Professional & scientific | 2021 |
| Lukasz Gebala Transport Ltd. | Transport & logistics | 2014 |
| Luke Pomfrett Inspection Services Limited | Construction | 2017 |
| Luked Transport Ltd | Transport & logistics | 2024 |
| Lulay Communications Ltd | Information & communication | 2026 |
| Luma Property Group Ltd | Real estate | 2026 |
| Lumagen Limited | Construction | 2024 |
| Lumb Brook Millennium Green Limited | Health & social care | 2010 |
| Lume Software Limited | Information & communication | 2018 |
| Lumen Lighting Limited | Professional & scientific | 2010 |
| Lumeo Developments Ltd | Real estate | 2025 |
| Lumiatech Solutions Ltd | Professional & scientific | 2024 |
| Lumifil Poland Ltd | Wholesale & retail | 2021 |
| Lumifil UK Ltd | Wholesale & retail | 2020 |
| Luminaliving Ltd | Real estate | 2025 |
| Luminara Consulting Ltd | Administrative & support | 2026 |
| Luminex Electrical Contractors Ltd | Manufacturing | 2014 |
| Luminous Rectangle Limited | Administrative & support | 2013 |
| Lumipro UK Ltd | Wholesale & retail | 2023 |
| Lumisure Ltd | Financial services | 2023 |
| Lumora Sales and Consulting Ltd | Professional & scientific | 2026 |
| Lumsden Management Services Ltd | Administrative & support | 2025 |
| Luna LET Ltd | Information & communication | 2021 |
| Luna Property NW Ltd | Real estate | 2021 |
| Lunai Ltd | Information & communication | 2026 |
| Lunanovo Properties Limited | Real estate | 2024 |
| Lunarock Studios Ltd | Information & communication | 2026 |
| Luno WA Limited | Hospitality | 2025 |
| Lure Menswear Ltd. | Manufacturing | 2020 |
| Lusso Manufacturing Limited | Manufacturing | 2023 |
| Lusso Recruitment Limited | Administrative & support | 2023 |
| Lusso Transport Ltd | Transport & logistics | 2025 |
| Luvucu Ltd | Wholesale & retail | 2023 |
| LUX Brite UK Limited | Wholesale & retail | 2005 |
| LUX Doors Ltd | Construction | 2025 |
| Luxcraft Limited | Construction | 2025 |
| Luxe Consultancy Ltd | Professional & scientific | 2014 |
| Luxe Salon & Training Limited | Other services | 2023 |
| Luxist Ltd. | Professional & scientific | 2022 |
| Luxmy Group Limited | Information & communication | 2025 |
| Luxofresh Ltd | Wholesale & retail | 2021 |
| Luxshare - ICT Europe Limited | Wholesale & retail | 2014 |
| Luxury Renovations Ltd | Construction | 2020 |
| Luxx Design and Build Ltd | Construction | 2024 |
| Luxzoura Limited | Manufacturing | 2025 |
| Luzorah Ltd | Wholesale & retail | 2026 |
| LV Bathrooms Limited | Construction | 2021 |
| LV Building Management Limited | Administrative & support | 2016 |
| LV Construct Limited | Construction | 2023 |
| LV Project Services Ltd | Construction | 2023 |
| LVH Consultancy Limited | Administrative & support | 2015 |
| LW Maintenance Ltd | Professional & scientific | 2024 |
| LW Test Consultancy Limited | Administrative & support | 2016 |
| Lwet Ltd | Other services | 2019 |
| Lwfibf Limited | Administrative & support | 2026 |
| LWG Services Ltd | Manufacturing | 2009 |
| LWT Consulting Ltd | Administrative & support | 2023 |
| LXT Network Solutions Limited | Information & communication | 2022 |
| Lyall Properties Limited | Construction | 2020 |
| Lycan Project Services Limited | Administrative & support | 2026 |
| Lyceum Financial Planning Limited | Financial services | 2018 |
| Lychgate Court Management Company Limited | Real estate | 2005 |
| LYD DOC Creative Limited | Professional & scientific | 2019 |
| Lyme Propco 1 Limited | Real estate | 2025 |
| Lymm Accounting Ltd | Professional & scientific | 2012 |
| Lymm Brewery TAP Ltd. | Hospitality | 2013 |
| Lymm Cars Limited | Wholesale & retail | 2012 |
| Lymm Construction Ltd | Construction | 2022 |
| Lymm Electric Limited | Construction | 2021 |
| Lymm Engine Components Limited | Wholesale & retail | 2012 |
| Lymm Hydraulics Ltd | Manufacturing | 2017 |
| Lymm Management Services Limited | Information & communication | 2012 |
| Lymm Road Properties Limited | Real estate | 2007 |
| Lymm Scaffolding Limited | Construction | 2012 |
| Lymm Truckwash Limited | Transport & logistics | 1997 |
| Lymmited Land Jets Ltd | Transport & logistics | 2025 |
| Lymphology Ltd | Other services | 2025 |
| Lynch Property Development Limited | Real estate | 2019 |
| Lynchehaun Consulting Limited | Professional & scientific | 2023 |
| Lyndmere Ltd | Administrative & support | 2026 |
| Lynn Design Piping Ltd | Professional & scientific | 2018 |