| LEE Glanville Carpentry Ltd | Construction | 2011 |
| LEE Haskins Ltd | Hospitality | 2020 |
| LEE Jennings Carpentry & Joinery Limited | Manufacturing | 2014 |
| LEE Mcgreevy QS Services Ltd | Professional & scientific | 2023 |
| LEE Mets Electrical Contractors Limited | Construction | 2010 |
| LEE Nails Spa Limited | Other services | 2025 |
| LEE R Scott Limited | Arts & recreation | 2019 |
| LEE Ricketts Limited | Construction | 2004 |
| LEE Selby Limited | Arts & recreation | 2014 |
| LEE Selby Properties Ltd | Real estate | 2018 |
| LEE UK Properties Limited | Real estate | 2020 |
| LEE Walker Ltd | Construction | 2016 |
| LEE Walters Design Tech Ltd | Information & communication | 2025 |
| LEE Whittaker Ltd | Professional & scientific | 2019 |
| Lee's Henley Fish Bar Ltd | Hospitality | 2019 |
| Lee's Waste Disposal Ltd | Water & waste | 2026 |
| Leefe Robinson Mews Management Company Limited | Households | 2022 |
| Leefitnesscoaching Ltd | Education | 2021 |
| Leenadav Limited | Real estate | 2020 |
| Lees Carpets & Flooring Ltd | Wholesale & retail | 2026 |
| Lees Carpets Ltd | Wholesale & retail | 2009 |
| Leese & Gordon Estate Agents Ltd | Real estate | 2003 |
| Leesh & Brish Property Lets Ltd | Real estate | 2025 |
| Leeside Consulting Limited | Other services | 2011 |
| Leeuwenburgh Veneers (UK) Limited | Administrative & support | 2000 |
| Leeway Motor Company Limited | Wholesale & retail | 2017 |
| Left Handed Giant Ltd. | Manufacturing | 2013 |
| Lefter Courier Ltd | Transport & logistics | 2023 |
| Lefthand Creative Limited | Professional & scientific | 2014 |
| Leftwich Warehouses Limited | Real estate | 1936 |
| LEG Property Ltd | Real estate | 2025 |
| Legacy 3TLD Property LLP | | 2019 |
| Legacy Bodyworks Ltd | Wholesale & retail | 2025 |
| Legacy Contracts Ltd | Construction | 2025 |
| Legacy Developments (Bristol) Limited | Real estate | 2022 |
| Legacy Hill Resources Ltd | Mining & quarrying | 2014 |
| Legacy Pro Fitness Ltd | Arts & recreation | 2024 |
| Legacy Renew Ltd | Professional & scientific | 2025 |
| Legacy Security Group Limited | Administrative & support | 2024 |
| Legal and Wealth Limited | Professional & scientific | 2017 |
| Legal Claims Group Limited | Financial services | 2017 |
| Legal Consultancy Enterprises Limited | Professional & scientific | 2006 |
| Legal London Ltd | Administrative & support | 2021 |
| Legal Protection Group Limited | Financial services | 2016 |
| Legalitea Ltd | Administrative & support | 2020 |
| Legamo Limited | Professional & scientific | 2018 |
| Legatus Enterprises Ltd | Financial services | 2026 |
| Legend Brands Europe Holdings Limited | Manufacturing | 1998 |
| Legends & Shadows Ltd | Wholesale & retail | 2026 |
| Legends Awaken Limited | Information & communication | 2023 |
| Legends Bristol Ltd | Arts & recreation | 2021 |
| Leggwork Construction Services Limited | Administrative & support | 2019 |
| Legion House Developments Ltd | Construction | 2013 |
| Legsm Limited | Information & communication | 2013 |
| Legwork Property Solutions Ltd | Construction | 2008 |
| LEH Ventures Ltd | Information & communication | 2019 |
| Lehamim Ltd | Wholesale & retail | 2020 |
| Lehj Holdings Ltd | Real estate | 2019 |
| LEI Group Holdings Ltd | Financial services | 2018 |
| Leicester BSF Company 1 Limited | Construction | 2007 |
| Leicester BSF Company 2 Limited | Construction | 2011 |
| Leicester BSF Holdings Company 1 Limited | Construction | 2007 |
| Leicester BSF Holdings Company 2 Limited | Construction | 2011 |
| Leicester Hose & Hydraulics Limited | Administrative & support | 2005 |
| Leidos Calanais Limited | Administrative & support | 2011 |
| Leidos Europe, Limited | Transport & logistics | 2014 |
| Leidos Supply, Limited | Transport & logistics | 2014 |
| Leigh Court (Bristol) Limited | Households | 1966 |
| Leigh Court Farm Limited | Agriculture & fishing | 2002 |
| Leigh Court Holdings Limited | Professional & scientific | 2000 |
| Leigh Court Management Limited | Administrative & support | 1990 |
| Leigh Court Properties Limited | Real estate | 2000 |
| Leigh Court Services Limited | Administrative & support | 2007 |
| Leigh Farmer T/A Well Land Limited | Administrative & support | 2025 |
| Leigh Visual Security Systems Limited | Administrative & support | 2018 |
| Leighton Design Studio Ltd | Professional & scientific | 2017 |
| Leighton-Carey Social Work Services Limited | Health & social care | 2014 |
| Leighwood House Management Limited | Households | 1963 |
| Leila Board Ltd | Information & communication | 2025 |
| Leila Peacock Limited | Professional & scientific | 2026 |
| Leila Playa NO.1 Limited | Professional & scientific | 1986 |
| Leila Playa NO.2 Limited | Professional & scientific | 1986 |
| Leila Playa NO.3 Limited | Professional & scientific | 1986 |
| Leinster House Partnership Ltd | Manufacturing | 2003 |
| Leisoft Ltd | Information & communication | 2025 |
| Leisure Directories Ltd | Information & communication | 2025 |
| Leisure Events Security Limited | Administrative & support | 2015 |
| Leisure Lodges Ltd | Hospitality | 2023 |
| Leisureline Consulting Limited | Administrative & support | 2007 |
| Leite Works Ltd | Wholesale & retail | 2025 |
| Leith Creatives Limited | Information & communication | 2006 |
| Leithenwater Wind Energy Hub Limited | Energy | 2021 |
| Leiza Transport Ltd | Transport & logistics | 2021 |
| Lek-Trix Limited | Construction | 2007 |
| Lela Investment Limited | Real estate | 2025 |
| LELAPA5 Ltd | Real estate | 2024 |
| Lemaks LP | | 2016 |
| Leman Property Ltd | Real estate | 2024 |
| Lemg Limited | Information & communication | 2009 |
| Lemnic Ltd | Hospitality | 2023 |