| Lloyd Investments Limited | Extraterritorial | 2008 |
| Lloyd Morgan Ltd | Real estate | 2023 |
| Lloyd Projects Group Ltd | Transport & logistics | 2024 |
| Lloyd Software Services Limited | Information & communication | 2019 |
| Lloyds Decorators Contractors Limited | Construction | 2016 |
| Lloyds Decorators Limited | Construction | 2003 |
| Lloyds Landscapes and Groundcare Limited | Administrative & support | 2015 |
| Lloyds WA3 Ltd | Real estate | 2014 |
| Llys Trefor Management Ltd | Households | 2008 |
| LM Properties North West Limited | Real estate | 2016 |
| LM Railway Engineering Limited | Professional & scientific | 2025 |
| LM Roofing and Cladding Services Limited | Construction | 2014 |
| LMA Consulting Limited | Information & communication | 2013 |
| Lman Consultancy Limited | Administrative & support | 2015 |
| Lmbs Education Limited | Education | 2026 |
| LMH Information Technology Limited | Information & communication | 2010 |
| LMS Electrical Services Ltd | Construction | 2026 |
| LN Properties Group Ltd | Financial services | 2025 |
| LNG Koga Limited | Transport & logistics | 2025 |
| LNH Storage Solutions Limited | Real estate | 2020 |
| LNH Transport Ltd | Transport & logistics | 2011 |
| LNP Consultancy Limited | Administrative & support | 2015 |
| Lo's Consultancy Co Ltd | Real estate | 2024 |
| LOA Transport Ltd | Transport & logistics | 2026 |
| Local Corner Limited | Wholesale & retail | 2026 |
| Local Corner Shop North Ltd | Wholesale & retail | 2020 |
| Local Property Maintenance (MCR) Ltd | Construction | 2025 |
| Local Removals Ltd | Water & waste | 2025 |
| Local Super OFF Licence Limited | Wholesale & retail | 2024 |
| Locker Architectural Limited | Professional & scientific | 2008 |
| Locker Group Limited | Financial services | 2005 |
| Locker Holdings Limited | Financial services | 2013 |
| Locker Wire Weavers Limited | Manufacturing | 1946 |
| Lockhart Mechanical Engineering Limited | Administrative & support | 2016 |
| Lockie Group Limited | Manufacturing | 2025 |
| Lockie Limited | Manufacturing | 2004 |
| Lockwood Collective Ltd | Information & communication | 2025 |
| Lockwood Construction Holdings Ltd | Financial services | 2017 |
| Lockwood Homes (Knutsford) Ltd | Construction | 2021 |
| Lockwood Homes (Mere) Ltd | Construction | 2021 |
| Lockwood Homes (Pickmere) Ltd | Construction | 2019 |
| Lockwood Homes (Wilmslow) Ltd | Construction | 2019 |
| Lockwood Homes Ltd | Construction | 2017 |
| Locserve Limited | Information & communication | 2012 |
| Lode Consulting Limited | Professional & scientific | 2018 |
| Lodestar Store Ltd | Wholesale & retail | 2025 |
| Lodge Engineering Ltd | Manufacturing | 2023 |
| Lodwicks Logistics Ltd | Transport & logistics | 2024 |
| Loftus Energy Limited | Administrative & support | 2024 |
| Logabyte Solutions Limited | Information & communication | 2008 |
| Logchain Global Ltd | Information & communication | 2026 |
| Logikal Network Limited | Transport & logistics | 2013 |
| Logisticsandconsultancy Ltd | Wholesale & retail | 2026 |
| Loglide Limited | Information & communication | 2021 |
| Loika Limited | Information & communication | 2026 |
| LOJ Limited | Hospitality | 2024 |
| LOJ100 Limited | Administrative & support | 2011 |
| LOK Fibre Services Limited | Administrative & support | 2024 |
| Loki Internet Limited | Information & communication | 2014 |
| Lola Consulting Ltd | Administrative & support | 2026 |
| Lola-Rae Candles Limited | Manufacturing | 2019 |
| Lollipop 732 Limited | Real estate | 2012 |
| Lomu Solutions Ltd | Administrative & support | 2023 |
| Londel Ltd | Real estate | 2002 |
| London and Manchester Healthcare Ltd | Health & social care | 2009 |
| London City Management Ltd | Construction | 2018 |
| London Construction and Consultancy Ltd | Administrative & support | 2023 |
| London International Student Exchanges Limited | Hospitality | 2018 |
| London Pioneer Training & Consulting Limited | Professional & scientific | 2024 |
| London Tower Service Limited | Wholesale & retail | 1988 |
| London's Own Limited | Information & communication | 2016 |
| Long Covid Support | Health & social care | 2021 |
| Long Lane (Costessey) Limited | Real estate | 2021 |
| Long Place Ltd | Hospitality | 2017 |
| Long Throats Limited | Hospitality | 2025 |
| Longb Co. Ltd | Wholesale & retail | 2024 |
| Longcap Engineering Limited | Administrative & support | 2007 |
| Longfield Gardens Management Company Limited | Real estate | 2008 |
| Longs Convenience Ltd | Wholesale & retail | 2024 |
| Longshaw Ward Ltd | Arts & recreation | 2016 |
| Longwell Europe Limited | Wholesale & retail | 2002 |
| Longworth Architectural Louvres Limited | Construction | 2025 |
| Longworth Building Services Limited | Construction | 1996 |
| Longworth Group Ltd | Administrative & support | 2001 |
| Longworth Hard Metals Ltd | Construction | 2021 |
| Longworth Specialist Services Ltd | Professional & scientific | 2020 |
| Looks Legend Ltd | Wholesale & retail | 2021 |
| Loomstate Limited | Professional & scientific | 2020 |
| Loop Pro Accountancy Ltd | Administrative & support | 2025 |
| Loop Property Ltd | Real estate | 2024 |
| Lorainemarielaing Ltd | Health & social care | 2015 |
| Lords Fold (Rainford) Management Company Limited | Households | 2021 |
| Lorena & Sorin Services Limited | Administrative & support | 2015 |
| Lorenzo Cargo Ltd | Transport & logistics | 2024 |
| Lorex Estates Limited | Extraterritorial | 2018 |
| Lorimer Training Limited | Administrative & support | 2025 |
| Lost C.I.C. | Arts & recreation | 2024 |
| Lost Gatsby & Co. Ltd | Hospitality | 2024 |
| Lots of Lambdas Ltd | Information & communication | 2019 |
| Lotsu Consults Limited | Administrative & support | 2025 |