| Leon Rudd Consulting Ltd | Professional & scientific | 2025 |
| Leon Stolarski Fine Wines Limited | Wholesale & retail | 2003 |
| Leon's Pricewise Ltd | Wholesale & retail | 2021 |
| Leonard Design Group Limited | Professional & scientific | 2016 |
| Leonard Design Limited | Professional & scientific | 2006 |
| Leonard Murray & Associates Limited | Professional & scientific | 2004 |
| Leonard School of Dance Ltd | Education | 2003 |
| Leonardi Ltd | Professional & scientific | 2021 |
| Leonardo's Property Ltd | Real estate | 2023 |
| Leonshaws Properties Limited | Real estate | 2021 |
| Leonx Limited | Manufacturing | 2016 |
| Leoon Restaurant Ltd | Hospitality | 2024 |
| Leopard Roofing Ltd | Construction | 2026 |
| Leoville Properties Ltd | Construction | 2020 |
| Leptiss Consultants Ltd | Households | 2025 |
| LES Charles Engineering Services Ltd | Construction | 2016 |
| LES Riley & Sons Limited | Construction | 1999 |
| Lesan Ltd | Wholesale & retail | 2025 |
| Lesh Consulting Ltd | Administrative & support | 2024 |
| Lesh Investing Ltd | Real estate | 2019 |
| Lesley & Jones Properties Ltd | Real estate | 2026 |
| Lesley Cree Opticians Limited | Wholesale & retail | 2012 |
| Lesley Greaves Limited | Real estate | 2006 |
| Lessgears Limited | Education | 2004 |
| Lester Gill Consulting Ltd | Information & communication | 2018 |
| Lester Properties Limited | Real estate | 2025 |
| LET & Stay Ltd | Hospitality | 2019 |
| LET Clean Ltd | Administrative & support | 2020 |
| LET Nature Provide Ltd | Wholesale & retail | 2012 |
| LET US Meat UK Limited | Wholesale & retail | 2020 |
| Let's GET Letting Ltd | Extraterritorial | 2020 |
| Let's Grab IT Ltd | Transport & logistics | 2021 |
| Let's Recycle Artificial Grass Ltd | Administrative & support | 2023 |
| Let-Win Ltd | Real estate | 2022 |
| Letra Limited | Wholesale & retail | 2008 |
| Lets by the Sea Ltd | Hospitality | 2020 |
| Lets Cheer Ltd | Transport & logistics | 2024 |
| Lets LET Properties Ltd | Real estate | 2012 |
| Lets Make Change Limited | Education | 2025 |
| Lets Move Nottingham Limited | Real estate | 2015 |
| Lets Protect Limited | Financial services | 2020 |
| Lets Talk Credit Limited | Administrative & support | 2019 |
| Letsaspire Consultancy Ltd | Professional & scientific | 2025 |
| Letsfixit Ltd | Professional & scientific | 2012 |
| Letsgig Ltd | Hospitality | 2024 |
| Letters and Links Ltd | Wholesale & retail | 2021 |
| Letting IT BE Limited | Real estate | 2025 |
| Lettings Deluxe Ltd | Real estate | 2026 |
| Letts Services Ltd | Manufacturing | 2022 |
| Letts Wheeler Architecture & Design Limited | Construction | 2003 |
| Levan African Restaurant Limited | Hospitality | 2025 |
| Levan Cafe Ltd | Hospitality | 2022 |
| Levantine Cuisine Notts Ltd | Hospitality | 2025 |
| Levaroo Limited | Wholesale & retail | 2026 |
| Levay Ltd | Wholesale & retail | 2022 |
| Level 1 Network Solutions Limited | Information & communication | 2019 |
| Level Lettings Limited | Real estate | 2019 |
| Level UP Arcade Limited | Arts & recreation | 2024 |
| Level UP DAN Construction Ltd | Construction | 2021 |
| Levelo Coaching Ltd | Professional & scientific | 2025 |
| Levels Groundwork’S and Landscaping Ltd | Construction | 2025 |
| Levelsett Limited | Construction | 1998 |
| Leveragepoint AI Ltd | Information & communication | 2025 |
| Levers Virtual Shopping Ltd | Wholesale & retail | 2023 |
| Levers-George Design Limited | Professional & scientific | 2025 |
| Leverton Environmental Services Limited | Water & waste | 2009 |
| Leverton Holdings Limited | Financial services | 2009 |
| Leverton Plant Limited | Administrative & support | 2009 |
| Levins Limited | Wholesale & retail | 2017 |
| Levromax Ltd | Real estate | 2018 |
| Levy Inter Limited | Construction | 2022 |
| Levy Investments (UK) Limited | Real estate | 2014 |
| Lewan's Limited | Real estate | 2023 |
| Lewcan Limited | Professional & scientific | 1991 |
| Lewin Estates Ltd | Real estate | 2025 |
| Lewins Accountants Limited | Professional & scientific | 2024 |
| Lewis & Ashbery Maintenance Property Services Ltd | Manufacturing | 2026 |
| Lewis & Mellors Limited | Construction | 1966 |
| Lewis & Ryan Property Ltd | Real estate | 2022 |
| Lewis Baba Limited | Wholesale & retail | 2026 |
| Lewis ETC. Ltd. | Extraterritorial | 2012 |
| Lewis Francois Management Ltd | Real estate | 2022 |
| Lewis Medical Services Limited | Health & social care | 2021 |
| Lewis Mitchell Builders Ltd | Construction | 2026 |
| Lewis Noble Art Limited | Arts & recreation | 2021 |
| Lewiscaters Limited | Hospitality | 2025 |
| Lewisham V.E. Limited | Other services | 1999 |
| LEX Agile Solutions Ltd | Information & communication | 2021 |
| LEX Aurea Ltd | Information & communication | 2025 |
| Lexan Development for Construction Ltd | Construction | 2021 |
| Lexay Business Solutions Limited | Wholesale & retail | 2023 |
| Lexilion Golf Ltd | Arts & recreation | 2023 |
| Lexilion Ltd | Arts & recreation | 2023 |
| Lexington Place Management Company Limited | Households | 2002 |
| Lexysliving Ltd | Real estate | 2023 |
| Leyden (Scunthorpe) Limited | Wholesale & retail | 1962 |
| Leys Heights Ltd | Real estate | 2016 |
| Leyton Motor Services Ltd | Wholesale & retail | 2014 |
| Leza Training Ltd | Hospitality | 2025 |
| Lezayla Empire Limited | Wholesale & retail | 2025 |