| LMB Consulting Limited | Professional & scientific | 2026 |
| LMB Signs Ltd | Professional & scientific | 2016 |
| LMC20 Limited | Construction | 2026 |
| Lmig Holdings Ltd | Hospitality | 2023 |
| Lmpg Holdings Ltd | Real estate | 2025 |
| LMW Innovations Limited | Administrative & support | 2025 |
| Lngb Ltd | Construction | 2018 |
| LNV Holdings Limited | Financial services | 2020 |
| LNV Limited | Information & communication | 2015 |
| LNV Properties Limited | Real estate | 2021 |
| Loaded Labz Ltd | Hospitality | 2026 |
| Loads Better Limited | Information & communication | 2002 |
| Loans Warehouse Limited | Financial services | 2006 |
| Lobotics Limited | Administrative & support | 2019 |
| LOC MED Recruitment Limited | Administrative & support | 2017 |
| Local KS Limited | Wholesale & retail | 2013 |
| Local Organic Growers CIC | Agriculture & fishing | 2024 |
| Local Renovators Ltd | Construction | 2025 |
| Localhomefoods Ltd | Manufacturing | 2025 |
| LOCALTRADERS2YOU Limited | Administrative & support | 2019 |
| Lock & Key Estates Ltd | Real estate | 2025 |
| Lock and Noble Limited | Information & communication | 2015 |
| Lock and Stock Studios Limited | Information & communication | 2010 |
| Lockleigh Limited | Professional & scientific | 2017 |
| Locks Ride Developments Ltd | Real estate | 2023 |
| Locksmith Master Limited | Administrative & support | 2023 |
| Lockwood Lettings Limited | Real estate | 2018 |
| Lodge Avenue Limited | Real estate | 2022 |
| Logho Professional Services Limited | Professional & scientific | 2026 |
| Logic IT Networks Limited | Information & communication | 2009 |
| Logic Recruitment Limited | Administrative & support | 1996 |
| Logical Recycling Limited | Water & waste | 2021 |
| Logiconic Investments Limited | Real estate | 2019 |
| Logicsafe Limited | Administrative & support | 2015 |
| Logicwise Software Ltd | Information & communication | 2024 |
| Logistic Don's Ltd | Administrative & support | 2023 |
| Logisticdata Ltd | Transport & logistics | 2024 |
| Logistique Distribution Ltd | Extraterritorial | 2022 |
| Logistique Express Ltd | Extraterritorial | 2022 |
| Logistique Holdings Ltd | Real estate | 2023 |
| Logistique Solutions Ltd | Transport & logistics | 2019 |
| Loidis Medical Services Ltd | Health & social care | 2024 |
| Loire Valley Stork Limited | Health & social care | 2022 |
| Lois Gastoneaux Limited | Construction | 1986 |
| Loiz Cashmere Limited | Wholesale & retail | 2022 |
| Lola Clips Limited | Information & communication | 2014 |
| Lollishop Ltd | Wholesale & retail | 2023 |
| Loma Ltd | Information & communication | 2024 |
| LOMO15 Ltd | Real estate | 2021 |
| Lonbridge Limited | Professional & scientific | 1997 |
| London & Colonial Ltd | Hospitality | 2022 |
| London Antiaging Clinic Ltd | Other services | 2018 |
| London Appliances Ltd | Construction | 2021 |
| London Bearings (Kent) Limited | Wholesale & retail | 1988 |
| London Calling Calendars Limited | Wholesale & retail | 2014 |
| London City Ventures Ltd | Other services | 2015 |
| London City Vintners Ltd | Wholesale & retail | 2019 |
| London Commercial Interiors Ltd | Administrative & support | 2019 |
| London Commercial Services Limited | Professional & scientific | 2025 |
| London Construction Equipment Solutions Limited | Administrative & support | 2022 |
| London Digital Web Ltd | Information & communication | 2021 |
| London Fashion Consultancy Ltd | Professional & scientific | 2011 |
| London Function Ltd | Real estate | 2017 |
| London General Trading Co. Limited | Professional & scientific | 2005 |
| London Gynae Clinic Ltd | Health & social care | 2016 |
| London H&W Ltd | Health & social care | 2021 |
| London Handyfix Limited | Construction | 2025 |
| London Hearing and Balance Centre Limited | Health & social care | 2010 |
| London Housing Group Limited | Real estate | 2015 |
| London Ignite Ltd | Construction | 2024 |
| London Integrated Care Ltd | Health & social care | 2024 |
| London Integrated Systems Ltd | Administrative & support | 2017 |
| London ITU Limited | Health & social care | 2012 |
| London K Cartel Ltd | Wholesale & retail | 2019 |
| London Lightworks Ltd | Construction | 2017 |
| London Maths Tutors Ltd | Education | 2025 |
| London Moving Services Ltd | Transport & logistics | 2020 |
| London Paving Ltd | Administrative & support | 2025 |
| London Performance Academy Ltd | Professional & scientific | 2017 |
| London Plant Limited | Administrative & support | 2014 |
| London Proactive Limited | Education | 2022 |
| London Professional Services Limited | Administrative & support | 2020 |
| London Property & Investment Group Limited | Construction | 2024 |
| London Real Estate Group Ltd | Real estate | 2021 |
| London School of Business and Public Affairs Ltd | Education | 2022 |
| London Secret Garden Limited | Real estate | 2011 |
| London SMA Ltd | Construction | 2024 |
| London Stubble Ltd | Wholesale & retail | 2025 |
| London Trade Properties Ltd | Real estate | 2019 |
| London Upvc Glazing Ltd | Manufacturing | 2023 |
| London Watford Ltd | Construction | 2025 |
| London Who's WHO Limited | Real estate | 2013 |
| London's Loop Ltd | Wholesale & retail | 2019 |
| Londonforus Ltd | Information & communication | 2014 |
| Londonhair Limited | Wholesale & retail | 2024 |
| Londonnut Ltd | Information & communication | 2015 |
| Londonwide (2018) Limited | Extraterritorial | 2018 |
| Londonwide Properties PLC | Construction | 1996 |
| Londonwide Roofing Ltd | Construction | 2025 |
| Londown Limited | Wholesale & retail | 1994 |