| LNO & Associates Limited | Real estate | 2026 |
| Load Developments Limited | Other services | 2017 |
| Load Toad Limited | Professional & scientific | 2002 |
| Loan Talk Limited | Extraterritorial | 2003 |
| Loates Business Solutions Limited | Administrative & support | 2011 |
| Lobo Holdings Limited | Financial services | 1998 |
| Lobo Systems Limited | Manufacturing | 1996 |
| Local Business Pocket Book Limited | Professional & scientific | 2026 |
| Local Roofing Supplies (Derby) Ltd | Construction | 2024 |
| Local Scoop (Digital) Limited | Information & communication | 2024 |
| Local Top Traders Ltd | Information & communication | 2016 |
| Local Trusted Boiler Repair Ltd | Construction | 2025 |
| Local Vending Limited | Hospitality | 2002 |
| Locally WE DO... Beauty & Wellbeing Services UK Ltd | Health & social care | 2025 |
| Locally WE DO... Bespoke Property Solutions UK Ltd | Construction | 2025 |
| Locally WE DO... Enterprise Holdings Ltd | Financial services | 2025 |
| Locally WE DO... Franchises UK Ltd | Professional & scientific | 2025 |
| Locally WE DO... Support Services UK Ltd | Health & social care | 2024 |
| Locanda UNO Ltd | Real estate | 2024 |
| Located Living Ltd. | Real estate | 2018 |
| Lock ‘N’ Roll Derbyshire Locksmiths Ltd | Administrative & support | 2025 |
| Lockdale Properties Ltd | Real estate | 2022 |
| Locked in Lessons Ltd | Education | 2026 |
| Lockfinder Ltd | Wholesale & retail | 2014 |
| Lockington Financial Ltd | Financial services | 2013 |
| Locko Ventures Ltd | Transport & logistics | 2024 |
| Locksmith by John G and Co Ltd | Manufacturing | 2017 |
| Lockwood Haulage Limited | Transport & logistics | 1972 |
| Lockwood Kitchens Ltd | Manufacturing | 2024 |
| Lockwoods Limited | Manufacturing | 1973 |
| Locum 24X7 Ltd | Health & social care | 2024 |
| Locum House Ltd | Administrative & support | 2017 |
| Locum Locato Limited | Health & social care | 2012 |
| Locum Search Limited | Administrative & support | 2003 |
| Locumdex Ltd | Health & social care | 2015 |
| Lodge Hill Management Company Limited | Households | 2020 |
| Loft Consult Ltd | Professional & scientific | 2025 |
| Loft ONE12 Limited | Professional & scientific | 2015 |
| Lofty Consultant Ltd | Manufacturing | 2026 |
| Logezy Academy Ltd | Education | 2020 |
| Logger Ltd | Wholesale & retail | 2014 |
| Loggerheads Limited | Real estate | 2025 |
| Loggerheads Yard (Whitby) Ltd | Real estate | 2025 |
| Logiforce Limited | Professional & scientific | 2010 |
| Logjam Solutions Limited | Information & communication | 2014 |
| Loki Ltd | Wholesale & retail | 2023 |
| Lokr Sports Ltd | Information & communication | 2023 |
| Lokstar Limited | Real estate | 2021 |
| Lolosbeads Limited | Manufacturing | 2019 |
| Lomac Property Limited | Real estate | 2020 |
| Lomak Electrical Services Ltd | Manufacturing | 2021 |
| London and Commercial Enterprises Ltd | Professional & scientific | 2020 |
| London Brand Management Ltd | Administrative & support | 2011 |
| London Commercial Interiors Group Ltd | Professional & scientific | 2025 |
| London Forensic Pathology Limited | Health & social care | 2007 |
| London IEC Capital Ltd | Real estate | 2025 |
| London International Clinic Limited | Professional & scientific | 2017 |
| London International Endocrine Clinic Limited | Health & social care | 2022 |
| London International Property Limited | Real estate | 2022 |
| London Medical Recruitment Ltd | Administrative & support | 2025 |
| London Odion Ltd | Professional & scientific | 2026 |
| London Software Training Limited | Education | 2018 |
| London Student Network Ltd | Education | 2024 |
| London Top Rentals Ltd | Real estate | 2026 |
| Londons Luxury Candle Supplies Ltd | Wholesale & retail | 2018 |
| Lone Wolf SD Limited | Manufacturing | 2025 |
| Lonely BOY Ltd | Manufacturing | 2022 |
| Long Beech Developments Ltd | Construction | 2020 |
| Long Eaton Barber Shop Limited | Other services | 2003 |
| Long Eaton BJJ Limited | Arts & recreation | 2017 |
| Long Eaton Caravans Limited | Other services | 2005 |
| Long Eaton Guild of Furniture Manufacturers Limited | Administrative & support | 2001 |
| Long Eaton Health and Fitness Ltd | Arts & recreation | 2024 |
| Long Eaton Transport and Plant Ltd | Wholesale & retail | 2017 |
| Long HAN Ltd | Hospitality | 2020 |
| Long Motors Limited | Wholesale & retail | 2018 |
| Long Rose Electronic Ltd | Manufacturing | 2018 |
| Longbridge Building & Civil Engineering Ltd | Construction | 2012 |
| Longbridge Enterprises Limited | Professional & scientific | 2007 |
| Longcroft Boarding Kennels & Cattery Limited | Other services | 2023 |
| Longford House Limited | Professional & scientific | 2020 |
| Longford Property Holdings Ltd | Real estate | 2023 |
| Longlands Lane (Findern) Management Company Limited | Real estate | 2005 |
| Longmoor Consulting Limited | Information & communication | 2015 |
| Longpark Tower LLP | | 2026 |
| Longridge Farm (Bedlington) Management Company Limited | Households | 2020 |
| Longrose Leisure Limited | Hospitality | 2016 |
| Longstone Consulting Limited | Professional & scientific | 2024 |
| Longview Estates Limited | Real estate | 2025 |
| Longwick Chase Residents Management Company Limited | Households | 2023 |
| Longxing 888 Limited | Hospitality | 2025 |
| Lonik Group Ltd | Wholesale & retail | 2024 |
| Lonleaf Ltd | Wholesale & retail | 2016 |
| Lonsdale Financial Consulting Limited | Administrative & support | 1998 |
| Lonsdale Swimming & Sports Trading Limited | Arts & recreation | 2013 |
| Lonsdale Swimming and Sports Trust Limited | Arts & recreation | 2006 |
| Lont Properties Limited | Real estate | 2007 |
| Looe Leisure Limited | Arts & recreation | 1991 |
| Lookup Solutions Ltd | Information & communication | 2022 |
| Loop Europe Ltd | Information & communication | 2014 |