| Lonhai Ltd | Manufacturing | 2026 |
| Looks Like New Cleaning Limited | Administrative & support | 2011 |
| Loom Leasehold Limited | Professional & scientific | 2022 |
| Loom Legal Limited | Administrative & support | 2016 |
| Loona Properties Ltd | Real estate | 2023 |
| Loong Mang PAI Ltd. | Arts & recreation | 2016 |
| Loop Management Consultants Limited | Professional & scientific | 2025 |
| Loopsystems Global Limited | Financial services | 2025 |
| Loralei Richards Wealth Management Limited | Financial services | 2014 |
| Lord Barty Events Limited | Other services | 2021 |
| Lords of the Manor | | 1995 |
| Lorien Project Management Ltd | Professional & scientific | 2026 |
| Lost Lions Tribe Ltd | Wholesale & retail | 2026 |
| Lottie & Albert Limited | Wholesale & retail | 2025 |
| LOU Rumi Music Ltd | Information & communication | 2023 |
| Lou's Barbershop Ltd | Other services | 2018 |
| Louden Developments Ltd | Construction | 2023 |
| Louell Homes Ltd | Construction | 2025 |
| Loughrigg Holdings Limited | Financial services | 2019 |
| Louie-Paul Jaspal Limited | Information & communication | 2023 |
| Louis Parsons Limited | Administrative & support | 2008 |
| Louise Jackson Interior Design Ltd | Professional & scientific | 2013 |
| Louise Johnston Management Limited | Professional & scientific | 2015 |
| Louise Newman & Co Ltd | Professional & scientific | 2013 |
| Loumin Estates Limited | Construction | 2006 |
| Lounge Seventy Two Ltd | Hospitality | 2010 |
| LOUNGE63 Limited | Hospitality | 2013 |
| Lovat House Holdings Limited | Financial services | 2018 |
| Lovat House Limited | Health & social care | 2018 |
| Love Experience Ltd | Professional & scientific | 2016 |
| Love Giving Ltd | Professional & scientific | 2018 |
| Love Health and Healing Limited | Other services | 2013 |
| Love INK Limited | Real estate | 2023 |
| Love Leadership Limited | Professional & scientific | 2021 |
| Love Parasols Limited | Wholesale & retail | 2026 |
| Love Trails Festival Ltd | Arts & recreation | 2017 |
| Love Your Content Ltd | Professional & scientific | 2024 |
| Lovell Purbeck Limited | Extraterritorial | 2013 |
| Lovell Stone Group Holdings Limited | Financial services | 2015 |
| Lovell Stone Group Limited | Mining & quarrying | 2009 |
| Lovers Grove Management Company Limited | Households | 2024 |
| Lovesfood Limited | Hospitality | 2017 |
| Loving Properties Ltd | Real estate | 2021 |
| LOW Cost Cleaning Limited | Administrative & support | 1969 |
| Lowe P27 Bidco Limited | Other services | 2018 |
| Lower Farm Holdings Limited | Real estate | 2023 |
| Lower Mill Holdings Ltd | Real estate | 2025 |
| Lower Swell Management Limited | Professional & scientific | 2003 |
| Lower Swell Properties Limited | Construction | 2019 |
| Lowmandale Limited | Real estate | 2024 |
| Lowry’S Espresso Bar Limited | Hospitality | 2019 |
| LOX Bar Co Ltd | Hospitality | 2019 |
| Loxley Building Solutions Ltd | Construction | 2006 |
| Loxley Business Services (Cotswolds) Limited | Administrative & support | 2021 |
| Loxley Holidays Limited | Hospitality | 2017 |
| Loxton Capital Limited | Financial services | 2026 |
| Loxton Property Consultants Limited | Construction | 2026 |
| Loxwood Building Services Limited | Construction | 2020 |
| Loyac Ltd | Health & social care | 2015 |
| Loyetapp Ltd | Information & communication | 2025 |
| LP Interiors Ltd | Construction | 2024 |
| LPC Painting Limited | Construction | 2015 |
| LPD Building Services Limited | Construction | 2024 |
| Lpwindows Ltd | Construction | 2025 |
| LR Electrical Services Ltd | Construction | 2020 |
| LRB Lettings Limited | Real estate | 2014 |
| LRC Glos and Bristol Storage Ltd | Transport & logistics | 2022 |
| LRC Gloucestershire and Bristol Removals Ltd | Transport & logistics | 2022 |
| LRC Gloucestershire Ltd | Transport & logistics | 2019 |
| LRC Gloucestershire Storage Ltd | Transport & logistics | 2019 |
| LRC Midlands and Oxfordshire Ltd | Transport & logistics | 2019 |
| LRC Midlands and Oxfordshire Storage Ltd | Transport & logistics | 2021 |
| LRG Van Hire Ltd | Transport & logistics | 2020 |
| LRH Consultancy Limited | Information & communication | 2016 |
| LRH Language Services Ltd | Professional & scientific | 2022 |
| LRW Global Ltd | Financial services | 2025 |
| LS Construction Ltd | Construction | 2016 |
| LS Roofing and SON Ltd | Construction | 2025 |
| Lscc Limited | Administrative & support | 2010 |
| LSN Health Ltd | Health & social care | 2024 |
| LT Construction & Landscape Ltd | Construction | 2022 |
| LT Countryside Services Ltd | Agriculture & fishing | 2020 |
| LTM Design Ltd. | Construction | 2015 |
| Lucas Powles Properties Limited | Real estate | 2024 |
| Lucere Consulting Limited | Professional & scientific | 2022 |
| Lucid Electrical Ltd | Construction | 2020 |
| Lucida's Cave Limited | Professional & scientific | 2020 |
| Lucky 13 Bikes Ltd | Manufacturing | 2019 |
| Lucky Onion Projects Limited | Extraterritorial | 2016 |
| Luctor Emergo Commerce Ltd | Wholesale & retail | 2025 |
| Lucy Cafe Ltd | Hospitality | 2024 |
| Lucy Clare Interiors Limited | Professional & scientific | 2018 |
| Lucy Lane FOX Limited | Other services | 2012 |
| Lucy MAE Consulting Ltd | Administrative & support | 2023 |
| Lucy's Cafe Limited | Hospitality | 2019 |
| Ludice Wealth Management Ltd | Financial services | 2021 |
| Lulu Balms and Creams Ltd | Manufacturing | 2026 |
| Lumeg Limited | Manufacturing | 2003 |
| Lumi Interiors Ltd | Manufacturing | 2023 |
| Lumiere.Cc Limited | Hospitality | 2003 |