| Livelystone FGA Ltd | Health & social care | 2025 |
| Living Esentials Ltd | Wholesale & retail | 2024 |
| Living in Loveliness Limited | Wholesale & retail | 2021 |
| Livingston Cochrane Square Real Estate Limited | Real estate | 2016 |
| Livkar & MAR Ltd | Wholesale & retail | 2017 |
| LIZ Health Care Ltd | Health & social care | 2018 |
| Liza Rogers Estates Ltd | Real estate | 2019 |
| Lizzy Investments Ltd | Real estate | 2021 |
| Ljdb Ltd | Administrative & support | 2023 |
| LJM Property Acquisitions Ltd | Real estate | 2021 |
| LJT CNC Maintenance Services Ltd | Manufacturing | 2021 |
| LJT Consulting Ltd | Professional & scientific | 2018 |
| LJT Electrical Contractors Limited | Construction | 2019 |
| Ljts PUB Co Limited | Hospitality | 2026 |
| LJV Housing (Chipping Campden) Management Co. Ltd | Real estate | 2014 |
| LK Autos and Vans Ltd | Wholesale & retail | 2024 |
| LK Laser Limited | Other services | 2022 |
| Lkkp Limited | Real estate | 2018 |
| LKM Software Ltd | Information & communication | 2024 |
| Lkw.Tattoos Ltd | Other services | 2016 |
| LL Property & Investments Ltd | Administrative & support | 2016 |
| LLJ Consultancy Ltd | Health & social care | 2015 |
| LLL TM Ltd | Construction | 2017 |
| LLM Auto Ltd | Wholesale & retail | 2024 |
| Lloyd a Limited | Wholesale & retail | 2016 |
| LM & T Limited | Health & social care | 2015 |
| LMP Landscapes Ltd | Administrative & support | 2024 |
| LMS Electrical (West Midlands) Ltd | Manufacturing | 2014 |
| Lmsi Transport Ltd | Transport & logistics | 2025 |
| LNT Distribution Ltd | Wholesale & retail | 2020 |
| Loadflow Ltd | Information & communication | 2026 |
| Loading Bay Service Ltd | Wholesale & retail | 2002 |
| Loaves Lovers Ltd | Manufacturing | 2025 |
| Local General Store Ltd | Wholesale & retail | 2026 |
| Local Haulage Ltd | Transport & logistics | 2018 |
| Local Hero Awards Ltd | Administrative & support | 2024 |
| Local Locksmith Cheap Ltd | Other services | 2019 |
| Local Saver Express Limited | Wholesale & retail | 2026 |
| Local SEO Wiser Ltd | Information & communication | 2026 |
| Local Translation Services Ltd | Professional & scientific | 2022 |
| Local Tree Services Ltd | Administrative & support | 2025 |
| Localseochief Ltd | Wholesale & retail | 2021 |
| LOCATION11 Ltd | Real estate | 2024 |
| Lock 7 Coffees Ltd | Hospitality | 2026 |
| Locket Ceremonies Limited | Other services | 2017 |
| Lockheart Advisory Ltd | Professional & scientific | 2026 |
| Loco Beauty Ltd | Other services | 2023 |
| Loco Cafe Ltd | Hospitality | 2024 |
| Lodge Park Commercial Developments Limited | Construction | 2006 |
| Lodge Swiftly Ltd | Real estate | 2025 |
| Lodgewood Site Limited | Water & waste | 2012 |
| Lodging Investments Ltd | Hospitality | 2020 |
| Loelroteo Ltd | Transport & logistics | 2021 |
| Lofts 4 Storage Ltd | Manufacturing | 2020 |
| Loftstyle Limited | Construction | 2005 |
| Logan Pubs & Clubs Ltd | Hospitality | 2020 |
| Logic Tree Limited | Information & communication | 2019 |
| Logicalwebsol Ltd | Wholesale & retail | 2025 |
| Logicswise Ltd | Professional & scientific | 2025 |
| Logimerc Limited | Wholesale & retail | 2025 |
| Logofy Ltd | Wholesale & retail | 2025 |
| Lohar Orthopedic Surgical Ltd | Manufacturing | 2024 |
| Loki Leisurewear Limited | Wholesale & retail | 2003 |
| Loki Specialist Limited | Other services | 2023 |
| Lomas Enterprises Limited | Hospitality | 2013 |
| London Cars Sale Ltd | Wholesale & retail | 2021 |
| London City Healthcare Limited | Health & social care | 2019 |
| London City Physiotherapy Limited | Health & social care | 2005 |
| London Creations Limited | Real estate | 2010 |
| London Diamond Exchange Ltd | Other services | 2015 |
| London Elite Centre Ltd | Professional & scientific | 2022 |
| London Safety Checks Ltd | Administrative & support | 2026 |
| London School of Fire Engineering Limited(The) | Education | 1986 |
| London School of Graduate Studies Limited | Education | 2025 |
| London Tech Supply Ltd | Wholesale & retail | 2025 |
| London Telecare Limited | Professional & scientific | 2005 |
| London Urology Limited | Health & social care | 2007 |
| London Westend Theatre Group Ltd | Administrative & support | 2023 |
| Londoncart Ltd | Wholesale & retail | 2026 |
| Lone Culprit Ltd | Wholesale & retail | 2023 |
| Lone Wolff Limited | Financial services | 2021 |
| Long Shore Driftwood Limited | Manufacturing | 2018 |
| Longevity-Uk Health Ltd | Health & social care | 2026 |
| Longford Care Limited | Health & social care | 2015 |
| Longford Investments (Cannock) Limited | Real estate | 1981 |
| Longlife Developments Ltd | Extraterritorial | 2013 |
| Look Sharp Perfect Barber Ltd | Other services | 2025 |
| Look Within Ltd | Wholesale & retail | 2023 |
| Looks Hair Studio Ltd | Other services | 2014 |
| Loopmart Ltd | Wholesale & retail | 2025 |
| Lopon Transport Ltd | Transport & logistics | 2023 |
| Lord of Sandhurst Ltd | Administrative & support | 2025 |
| Lord Street Properties Ltd | Real estate | 2025 |
| Lordex Logistics Limited | Transport & logistics | 2026 |
| Lords (Haymarket) Limited | Wholesale & retail | 1999 |
| Lords Enterprise Ltd | Real estate | 2021 |
| Lorellin Ltd | Other services | 2024 |
| Lorivo Limited | Wholesale & retail | 2026 |
| Lornab Ltd | Wholesale & retail | 2021 |
| Lorraine Upton Limited | Financial services | 2016 |