| LJI Knowles Utility Solutions Ltd | Construction | 2026 |
| LJR Marketing Ltd | Professional & scientific | 2023 |
| LJS Consultancy Ltd | Professional & scientific | 2020 |
| LJW Group Ltd | Construction | 2014 |
| LK Cars Limited | Wholesale & retail | 2018 |
| LK Cleaning (NW) Ltd | Professional & scientific | 2025 |
| LKH Consulting Ltd | Professional & scientific | 2023 |
| LKI Properties Limited | Real estate | 2025 |
| LKS Design & Build Ltd | Construction | 2025 |
| LKS Projects Ltd | Construction | 2022 |
| Lktoi Limited | Hospitality | 2023 |
| LL Consultants Ltd | Professional & scientific | 2026 |
| LLK Service & Repairs Limited | Extraterritorial | 2012 |
| Lllt Consulting Ltd | Professional & scientific | 2024 |
| Llme Limited | Hospitality | 2025 |
| Lloyd Flooring Ltd | Construction | 2025 |
| Lloyds Care Limited | Health & social care | 2022 |
| Lluumia Ltd | Other services | 2024 |
| LM Aesthetic B Ltd | Other services | 2026 |
| LM Beauty Ltd | Other services | 2025 |
| LM Conversions Ltd | Construction | 2020 |
| LM Plumbing & Property Maintenance Ltd | Construction | 2024 |
| LM Rainbow Limited | Other services | 2013 |
| LM Stone Creative Ltd | Construction | 2021 |
| LM Windows and Joinery Ltd | Construction | 2021 |
| Lmap Engineering Limited | Manufacturing | 2026 |
| LMR PC Repair Limited | Information & communication | 2019 |
| LMR Property Management Ltd | Real estate | 2026 |
| LN New Tajmahal Ltd | Hospitality | 2026 |
| Loadbasket Limited | Wholesale & retail | 2021 |
| Loaded Cartel Limited | Hospitality | 2024 |
| Loaded Cartelz Limited | Hospitality | 2026 |
| Loadlifter Limited | Real estate | 2006 |
| Lobo Seafood & Poultry Ltd | Agriculture & fishing | 2021 |
| Locadarlo Ltd | Health & social care | 2022 |
| Local Food First CIC | Agriculture & fishing | 2023 |
| Local Furniture Shop Ltd | Wholesale & retail | 2018 |
| Local Maintenance Solutions Ltd | Construction | 2025 |
| Localhost Development Ltd | Information & communication | 2025 |
| Lock & Key Homes Ltd | Real estate | 2024 |
| Lock Down Escape Rooms Limited | Arts & recreation | 2017 |
| Lockdown Promotions Limited | Administrative & support | 2017 |
| Locums Sixty One Limited | Wholesale & retail | 2022 |
| Lodge Lane Newsagents Ltd | Professional & scientific | 2018 |
| Lodgerig Ltd | Wholesale & retail | 2013 |
| Loft Estate Agents Ltd | Real estate | 2024 |
| Loft Twenty Four Limited | Hospitality | 2023 |
| Lofthouse Park Management Company Limited | Households | 2008 |
| Logan & Wilcox Limited | Arts & recreation | 2017 |
| Logan Roch Holding Co Ltd | Financial services | 2023 |
| Logic Engagements Limited | Administrative & support | 2004 |
| Logic Renewables Ltd | Construction | 2022 |
| Logic Upvc Limited | Construction | 2021 |
| Logik Estates Oldham Ltd | Financial services | 2024 |
| Logistic Agency Limited | Transport & logistics | 2010 |
| Logistic Global Solutions Ltd | Transport & logistics | 2012 |
| Logistics Management Limited | Professional & scientific | 2020 |
| Logistiquest Ltd | Wholesale & retail | 2025 |
| Logistixpro Ltd | Transport & logistics | 2025 |
| Lois Burton Ltd | Public administration | 2002 |
| Lois Burton Online Ltd | Administrative & support | 2016 |
| Lokfast Limited | Wholesale & retail | 1973 |
| Lollypop Limited | Hospitality | 2024 |
| London Beacon Academy Ltd | Information & communication | 2022 |
| London Cooling Services Limited | Energy | 2021 |
| London Crown Ltd | Wholesale & retail | 2023 |
| London Healthcare Limited | Wholesale & retail | 2000 |
| London One Studios Ltd | Information & communication | 2023 |
| Long Dog Events Ltd | Other services | 2020 |
| Long Time Dead Tattoo Ltd | Administrative & support | 2018 |
| Longan Trade Limited | Wholesale & retail | 2025 |
| Longeva Limited | Wholesale & retail | 2026 |
| Longevity Clinix Limited | Public administration | 2025 |
| Longley Control Solutions Limited | Manufacturing | 2012 |
| Longreal Ltd. | Real estate | 2012 |
| Longspur Technologies Ltd | Wholesale & retail | 2026 |
| Loofy Ltd | Information & communication | 2026 |
| Loomin Ltd | Administrative & support | 2022 |
| Loop Recruitment Ltd | Administrative & support | 2025 |
| Loopnetix Limited | Wholesale & retail | 2025 |
| Looto Ltd | Wholesale & retail | 2026 |
| Lord Demolition and Excavations Limited | Construction | 2020 |
| Lord Demolition Services Limited | Construction | 2013 |
| Lord Street Barber Ltd | Other services | 2026 |
| Lords Heating Limited | Administrative & support | 2009 |
| Lori Daniela Construction Ltd | Transport & logistics | 2020 |
| Lornacarter Limited | Hospitality | 2026 |
| Lors Engineering Ltd | Professional & scientific | 2024 |
| LOS Compadres Ltd | Hospitality | 2022 |
| Lost Souls Tattoo Studios Ltd | Other services | 2022 |
| Lotti Wave Limited | Administrative & support | 2013 |
| Lotus Leaf Reproofing Limited | Wholesale & retail | 2025 |
| LOU Casey Ltd | Administrative & support | 2020 |
| Lounais Property Ltd | Real estate | 2026 |
| Love (Holdings) Limited | Financial services | 2022 |
| Love Invoicing Ltd | Information & communication | 2026 |
| Love Mobility Limited | Wholesale & retail | 2017 |
| Love Stairlifts Limited | Wholesale & retail | 2017 |
| Love UK Interiors Ltd | Real estate | 2017 |
| Loveable Rogue Salvage Ltd | Water & waste | 2017 |