| Leamington Spa V.E. Limited | Other services | 1998 |
| Lean Sigma Consulting Ltd | Professional & scientific | 2014 |
| Leanca RO Trans Limited | Transport & logistics | 2019 |
| Leanderson Limited | Health & social care | 2013 |
| Leanhr Limited | Professional & scientific | 2014 |
| Leanstudentchef Ltd | Arts & recreation | 2018 |
| Leap Management Productions Ltd | Financial services | 2023 |
| Leapfrog Marketing Limited | Professional & scientific | 1992 |
| Leaping Education Ltd | Education | 2019 |
| Leaps and Heights Services Limited | Professional & scientific | 2024 |
| Learning Academy Education Limited | Education | 2021 |
| Learning Through Leadership Limited | Education | 2010 |
| Learning Works for Children Ltd | Health & social care | 2006 |
| Leasing Works International Ltd | Administrative & support | 2017 |
| Leasingham Estates Ltd | Construction | 2022 |
| Leastrong Ltd | Administrative & support | 2008 |
| Leat Property Investments Limited | Real estate | 2018 |
| Leathen Healthcare IT Solutions Ltd | Information & communication | 2016 |
| Leatherlux Products Limited | Wholesale & retail | 2024 |
| Leavy Property Development Ltd | Real estate | 2024 |
| Leaworks Development Limited | Real estate | 2012 |
| Leaworks East Limited | Real estate | 2016 |
| Leaworks Estate Ltd | Real estate | 2015 |
| Leaworks Lakeside Limited | Agriculture & fishing | 2017 |
| Leaworks Limited | Manufacturing | 2004 |
| Leaworks North Limited | Real estate | 2015 |
| Leaworks Properties Limited | Real estate | 2015 |
| Leaworks Riverside Limited | Real estate | 2016 |
| Leaworks South Limited | Real estate | 2016 |
| Leblek Ltd | Professional & scientific | 2022 |
| LEC (Nottm) Limited | Real estate | 2018 |
| Lecn Europe Limited | Wholesale & retail | 2017 |
| Lecture Space Limited | Education | 2021 |
| Lecturers Association for Academic Delivery Laad C.I.C. | Education | 2025 |
| Leda Resales Ltd | Wholesale & retail | 2025 |
| Ledba Sontas Ltd | Transport & logistics | 2025 |
| Ledecolite Ltd | Construction | 2013 |
| Ledgecrete Ltd | Real estate | 2023 |
| Ledger Bookkeeping Ltd | Professional & scientific | 2019 |
| Ledger PAL Ltd | Professional & scientific | 2025 |
| Ledian Gardens Management Limited | Households | 2021 |
| Ledmark Ltd | Manufacturing | 2010 |
| Ledra Consulting Ltd | Professional & scientific | 2015 |
| Ledture Limited | Manufacturing | 2023 |
| LEE Anthony Braybrook Limited | Construction | 2025 |
| LEE Beauty Ltd | Hospitality | 2021 |
| LEE Business Advisory Ltd | Financial services | 2017 |
| LEE Gareth Ltd | Information & communication | 2025 |
| LEE Glass Holdings Limited | Financial services | 2022 |
| LEE Glass Properties Limited | Real estate | 2002 |
| LEE Haven Management Ltd | Administrative & support | 2025 |
| LEE Haven Property Ltd | Real estate | 2024 |
| LEE Henshaw Transport Ltd | Transport & logistics | 2022 |
| LEE Holmes Beauty Limited | Other services | 2016 |
| LEE Holmes Limited | Other services | 2011 |
| LEE Long Island Limited | Real estate | 2012 |
| LEE Mattocks - Handmade in Nottingham Ltd | Wholesale & retail | 2023 |
| LEE Rosy's Tea Ltd | Wholesale & retail | 2005 |
| LEE Sheldon Golf Limited | Arts & recreation | 2007 |
| LEE Sherwood Building Contractors Limited | Construction | 2017 |
| LEE Wallis Gardens Limited | Administrative & support | 2017 |
| Lee.Hunter. Ltd | Wholesale & retail | 2025 |
| Lee.Hunterandco. Limited | Wholesale & retail | 2025 |
| Leec Group Holdings Limited | Financial services | 2026 |
| Leec Holdings Limited | Manufacturing | 2009 |
| Leec Limited | Manufacturing | 1979 |
| Leecolnkye Ltd | Wholesale & retail | 2025 |
| Leeds Air Conditioning Limited | Construction | 2025 |
| Leehall Property Ltd | Households | 2023 |
| Leela Construction Limited | Construction | 2018 |
| Leela Consulting Limited | Professional & scientific | 2026 |
| Leela Holdings Limited | Real estate | 2021 |
| Leeland Dental Limited | Health & social care | 2016 |
| Leeloy Properties Ltd | Real estate | 2024 |
| Leeman & Schwok Ltd | Real estate | 2021 |
| Leemash Investments Ltd | Administrative & support | 2015 |
| Leen Court Management Limited | Households | 1987 |
| Leen Cycling Ltd | Hospitality | 2017 |
| Leen Gate Engineering Co. Limited | Manufacturing | 1957 |
| Leen Gate Manufacturing Limited | Professional & scientific | 2005 |
| Leen Gate Metal Holdings Limited | Professional & scientific | 2005 |
| Leen Gate Metal Supplies Limited | Wholesale & retail | 1975 |
| Leen Gate Metals (Bedford) Limited | Wholesale & retail | 2010 |
| Leen Gate Metals Limited | Wholesale & retail | 2000 |
| Leen Gate Stockholders Limited | Financial services | 2015 |
| Leen Valley Angling Ltd | Agriculture & fishing | 2019 |
| Leenside Surgical Ltd | Health & social care | 2024 |
| Leepritchard Ltd | Information & communication | 2025 |
| Leeroys Takeaway Ltd | Hospitality | 2023 |
| Lees & Wilson Holdings Ltd | Hospitality | 2018 |
| Lees Property Investments Limited | Real estate | 2025 |
| Leetham Capital Holdings Ltd | Financial services | 2022 |
| Leewrangler U.K. Holdings Limited | Financial services | 2019 |
| Leewrangler U.K. Limited | Wholesale & retail | 2018 |
| Leeyah Services Ltd | Administrative & support | 2025 |
| Leezameer Ltd | Professional & scientific | 2021 |
| LEF & Co Ltd | Professional & scientific | 2024 |
| Left ME Blushing Ltd | Other services | 2026 |
| Leftlion Limited | Information & communication | 2013 |
| Legacy Builders Circle Ltd | Financial services | 2026 |