| Lexaabag Limited | Manufacturing | 2023 |
| Lexamin Legal Ltd | Professional & scientific | 2026 |
| Lexi Lets Ltd | Real estate | 2015 |
| Lextin Care and Support Limited | Public administration | 2024 |
| Lexuk Ltd | Wholesale & retail | 2026 |
| Lexun UK Ltd | Wholesale & retail | 2021 |
| LEY Hill Management Company Limited | Households | 2008 |
| Leyburn (13-23) Management Company Limited | Households | 1999 |
| Leyburn (2-18) Management Company Limited | Real estate | 1999 |
| Leyunchi Ltd | Professional & scientific | 2017 |
| LFG London Limited | Real estate | 2013 |
| LFS Consulting Services Limited | Professional & scientific | 2023 |
| Lfsgd Ltd | Professional & scientific | 2014 |
| LG Tech Ltd | Information & communication | 2026 |
| LGD Fleet Healthcare Ltd | Administrative & support | 2022 |
| LGM Engineering Limited | Professional & scientific | 2014 |
| LGP Consulting Ltd | Health & social care | 2014 |
| LGR London Limited | Administrative & support | 2017 |
| LHP Electrician Ltd | Construction | 2020 |
| LI4E Ltd. | Wholesale & retail | 2017 |
| Liam Neaves Engineering Ltd | Construction | 2020 |
| Liamholt Consultants Limited | Professional & scientific | 2015 |
| Lianne Foods Consultancy Limited | Professional & scientific | 2025 |
| Libbytee's Chocolate Factory Ltd | Hospitality | 2011 |
| Liber Logistics Ltd | Transport & logistics | 2022 |
| Liberal Hall (ST. Ives) Management Company Limited | Households | 2017 |
| Liberi Estates Limited | Real estate | 2025 |
| Liberty Bell AI Ltd | Information & communication | 2025 |
| Liberty Bell Ethical Enfranchisement Ltd | Households | 2025 |
| Liberty Bell Property Management Ltd | Households | 2023 |
| Liberty Health Ltd | Wholesale & retail | 2020 |
| Liberty Ladies Property Limited | Wholesale & retail | 2025 |
| Liberty NIO Limited | Construction | 2023 |
| Liberty Square Management Company Limited | Households | 1995 |
| Libra 240 Ltd | Real estate | 2025 |
| Libra Findon Limited | Wholesale & retail | 2010 |
| Libra Real Estates Ltd | Real estate | 2016 |
| Libra Residential Ltd | Real estate | 2019 |
| Librex Limited | Wholesale & retail | 2026 |
| Libris Park Management Co Ltd | Households | 2000 |
| License to Clean Ltd | Administrative & support | 2025 |
| Licensed Trade Stock Auditors Ltd | Administrative & support | 2024 |
| Lichfield Grange Management Company Ltd | Households | 2022 |
| Licmik Limited | Real estate | 2020 |
| Lidya Trading Ltd | Professional & scientific | 2012 |
| Life & Living - Baston Limited | Construction | 2025 |
| Life Balance Limited | Arts & recreation | 2020 |
| Life Changing Ministry International Limited | Other services | 2005 |
| Life Choice Global Resources Services Limited | Manufacturing | 2025 |
| Life City Church Ltd | Other services | 2004 |
| Life Counsel Limited | Health & social care | 2021 |
| Life Giving Grace International Ministry Ltd | Other services | 2019 |
| Lifecare Planning Solutions Limited | Other services | 2011 |
| Lifefood HUT Limited | Hospitality | 2018 |
| Lifeline Express CIC | Other services | 2022 |
| Lifestylesoul Ltd | Information & communication | 2019 |
| Lift Consultancy Services Limited | Professional & scientific | 2005 |
| Light of GOD Limited | Health & social care | 2022 |
| Light Style London Limited | Wholesale & retail | 2001 |
| Light Work Production Services Limited | Arts & recreation | 2025 |
| Lightbourne Legacy Ltd | Arts & recreation | 2013 |
| Lightmega Immigration Ltd | Professional & scientific | 2017 |
| Lightspace Properties Ltd | Real estate | 2024 |
| Lightwalk Consultancy Services Limited | Administrative & support | 2021 |
| Like NO Other Beauty Limited | Wholesale & retail | 2025 |
| Lil'Leo CIC | Information & communication | 2025 |
| Lilburn Langdon Limited | Real estate | 2014 |
| Lilium Restaurants Limited | Hospitality | 2014 |
| Lilly's Coffee Ltd | Hospitality | 2025 |
| Lily Field Ltd | Real estate | 2021 |
| Lily Lake Limited | Real estate | 2024 |
| Lily Milano Limited | Wholesale & retail | 2024 |
| Lima Lima Management Ltd | Real estate | 2017 |
| Lime Enterprise Ltd | Administrative & support | 2011 |
| Lime Tree Investments Limited | Real estate | 2019 |
| Lime Wharfe Management Company Limited | Households | 2007 |
| Limehurst (Services) Limited | Households | 1995 |
| Limelounge Coffee Limited | Hospitality | 2025 |
| Limeo Home Solutions Ltd | Manufacturing | 2024 |
| Limes Close (Redhill) Management Company Limited | Households | 2012 |
| Limes Park Management Co. Limited | Real estate | 1980 |
| Limestone Property Ltd | Real estate | 2026 |
| Limitless Connections Ltd | Construction | 2023 |
| Limitless Market Ltd | Wholesale & retail | 2023 |
| Limitless MB Ltd | Administrative & support | 2022 |
| Limmi Ventures Limited | Real estate | 2025 |
| Limon Construct Limited | Construction | 2019 |
| LIN Holdings Group Ltd | Real estate | 2026 |
| LIN Kells Ltd | Health & social care | 2023 |
| Lin's Unisex Beauty Salon Ltd | Other services | 2024 |
| Linaria Education Ltd | Professional & scientific | 2021 |
| Lincoln Dessert House Limited | Hospitality | 2025 |
| Lincoln Park Residents Association CIC | Households | 2019 |
| Lincoln Urogynaecology Care Ltd | Health & social care | 2025 |
| Lincolns Mead (Phase II) Management Company Limited | Households | 1996 |
| Lincolns Mead Management Company Limited | Households | 1986 |
| Linda's Kitchen&Catering Ltd | Hospitality | 2025 |
| Linden House Residents Company Limited | Households | 1968 |
| Linea Cobham Ltd | Real estate | 2022 |
| Linea Cutty Sark Ltd | Real estate | 2021 |