| Lawn Building Services Limited | Extraterritorial | 2003 |
| Lawrence Vehicles Limited | Wholesale & retail | 2001 |
| Lawrence&Family Properties Ltd | Real estate | 2024 |
| Lawson Skin Clinic Ltd | Other services | 2024 |
| Lawton Lowndes Group Limited | Administrative & support | 2003 |
| Layer Mills Holdings Limited | Financial services | 2022 |
| Layered Indulgence Ltd | Manufacturing | 2026 |
| Layns Serviced Apartments Ltd | Households | 2025 |
| Layzell Engineering (Derby) Limited | Professional & scientific | 2006 |
| Lazar Electronics Ltd | Other services | 2020 |
| Lazeeza Grill Derby Ltd | Hospitality | 2024 |
| LB Biostatistics Ltd | Information & communication | 2012 |
| LB Commercial Vehicle Services Ltd | Wholesale & retail | 2019 |
| LB Developments Ltd | Construction | 2026 |
| LB Fencing & Landscapes Ltd | Construction | 2022 |
| LB Midlands Limited | Hospitality | 2018 |
| LB Vision Properties Ltd | Real estate | 2019 |
| LBE Installations Ltd | Construction | 2005 |
| LC Nails and Beauty Ltd | Other services | 2025 |
| LCF Associates Limited | Financial services | 2025 |
| LCJ Professional Services Limited | Professional & scientific | 2012 |
| LCM Solutions Limited | Real estate | 2006 |
| LCR Rail Services Limited | Manufacturing | 2024 |
| LCS Ventures Ltd | Professional & scientific | 2023 |
| LD Reality Ltd | Real estate | 2025 |
| LD Subway Ltd | Hospitality | 2023 |
| LDR Consultancy Ltd | Information & communication | 2020 |
| LDS Direct Ltd | Wholesale & retail | 2024 |
| LE Bronk Property Ltd | Real estate | 2016 |
| LE Grain Consultancy Limited | Professional & scientific | 2024 |
| LE Strength & Conditioning Ltd | Arts & recreation | 2018 |
| LE VAL Retirement Solutions Limited | Financial services | 2022 |
| LEA Aesthetics Ltd | Health & social care | 2023 |
| Lead HER Story CIC | Education | 2025 |
| Lead One Limited | Professional & scientific | 2020 |
| Lead Rent Ltd | Professional & scientific | 2025 |
| Leading Edge Doors and Windows Ltd | Construction | 2022 |
| Leading the Blind Limited | Information & communication | 2024 |
| Leads for Lawyers Ltd | Information & communication | 2009 |
| Leaf Gifts Limited | Wholesale & retail | 2014 |
| Leaf Training Solutions Ltd | Education | 2019 |
| Leafgreen Consultants Ltd | Professional & scientific | 2021 |
| Leah Hill Holdings Ltd | Financial services | 2025 |
| Leakys Event Water Solutions Ltd | Construction | 2023 |
| Leamount Limited | Manufacturing | 1997 |
| Lean Constructs Group Limited | Administrative & support | 2018 |
| Lean Enterprise & Transformation Limited | Professional & scientific | 2018 |
| Lean Improvement Ltd | Professional & scientific | 2023 |
| Lean Intuition Limited | Information & communication | 2016 |
| Lean Leadership Solutions Limited | Professional & scientific | 2012 |
| Lean Machine (Leicester) Limited | Professional & scientific | 2008 |
| Lean Solutions (Derby) Limited | Professional & scientific | 2003 |
| Lean Tax Ltd | Professional & scientific | 2026 |
| Learning Hub (Littleover) LLP | | 2020 |
| Lease and Fleet Management Services Limited | Administrative & support | 1997 |
| Leasemaster Limited | Extraterritorial | 2011 |
| Leask Modular Limited | Professional & scientific | 2013 |
| Leat Properties Ltd | Households | 2017 |
| Leatnetic Ltd | Professional & scientific | 2021 |
| Lecaw (Duffield) Limited | Other services | 2016 |
| Lecaw Allestree Limited | Other services | 2018 |
| Lecaw Investment Group Limited | Professional & scientific | 2015 |
| Lecaw Limited | Other services | 2014 |
| Lecaw Mickleover Limited | Other services | 2023 |
| Lecaw Professional Services Limited | Construction | 2015 |
| Lecaw Ripley Limited | Other services | 2023 |
| LED Homes Ltd | Real estate | 2017 |
| Leddy's at 38 Ltd | Hospitality | 2024 |
| Lede Atelier Auto Interiors Ltd | Manufacturing | 2026 |
| Ledger Properties Limited | Real estate | 2010 |
| Ledjon Topalli Ltd | Manufacturing | 2025 |
| Ledom Ltd | Financial services | 2024 |
| LEE Court (ST Mary's Street) Management Company Limited | Real estate | 2006 |
| LEE Pearson Tiling Limited | Construction | 2017 |
| LEE Wynne Plastering Ltd | Construction | 2012 |
| Lee's Bodyshop Ltd | Wholesale & retail | 2026 |
| Leedale (1989) Limited | Transport & logistics | 2021 |
| Leedham Farm Limited | Agriculture & fishing | 2010 |
| Leeds Montessori Ltd | Education | 2014 |
| Leeds Tamatanga Limited | Hospitality | 2022 |
| Leeke Properties Limited | Construction | 2024 |
| Leen Ltd | Other services | 2026 |
| Lees Bank Management Limited | Real estate | 2011 |
| Leesbrook Rugby Union Football Club Ltd | Arts & recreation | 2016 |
| Leese & Moore Limited | Administrative & support | 2013 |
| Leez Properties Limited | Financial services | 2023 |
| Left Legal Support Group Ltd | Education | 2019 |
| Leftfield Property Ltd | Real estate | 2021 |
| LEGAC1 Limited | Extraterritorial | 2017 |
| Legacy Associates Limited | Professional & scientific | 2017 |
| Legacy Crown Consulting Limited | Information & communication | 2026 |
| Legacy Equine Rehabilitation Centre Ltd | Agriculture & fishing | 2023 |
| Legacy Holdings Derby Ltd | Real estate | 2021 |
| Legacy Interiors Ltd | Construction | 2015 |
| Legacy Lines Logistic Ltd | Transport & logistics | 2026 |
| Legacy Pipework & Welding Ltd | Energy | 2025 |
| Legacy Two Limited | Hospitality | 2025 |
| Legal Advice Centre UK Ltd | Financial services | 2012 |
| Legatoria Ltd | Administrative & support | 2025 |
| Legatum Capital Ltd | Financial services | 2023 |