| Level UP Lifestyle Limited | Professional & scientific | 2017 |
| Level VII Marketing Limited | Professional & scientific | 2024 |
| Lever Academy Trust | Education | 2015 |
| Lever Associates Holdings Limited | Financial services | 2021 |
| Lever Associates Limited | Professional & scientific | 2006 |
| Lever Bridge Limited | Hospitality | 2019 |
| Lever Convenience Store Limited | Wholesale & retail | 2021 |
| Lever Edge Equity Ltd | Real estate | 2020 |
| Lever Edge Primary Academy | Education | 2010 |
| Lever Edge Property Ltd | Real estate | 2021 |
| Lever Park Developments Limited | Real estate | 2022 |
| Lever Street Convenience Store Ltd | Wholesale & retail | 2017 |
| Leverforge Solutions Ltd | Information & communication | 2025 |
| Leverhulme Academy Church of England and Community Trust | Education | 2016 |
| Levin Software Ltd | Information & communication | 2022 |
| Levore Lashes Limited | Wholesale & retail | 2024 |
| Lewe Engineering Limited | Manufacturing | 2016 |
| Lewe Property Investment Ltd | Real estate | 2024 |
| Lewe Property Management Ltd | Real estate | 2022 |
| Lewis Lowery Communications Ltd | Professional & scientific | 2025 |
| Lewis Towers Ltd | Real estate | 2025 |
| Lewisjdolan Ltd | Construction | 2026 |
| LEX Insure Services Ltd | Financial services | 2017 |
| LEX Legal (UK) Ltd | Professional & scientific | 2012 |
| LEX Property Investment Limited | Real estate | 2016 |
| Lexander SCA Ltd | Health & social care | 2019 |
| Lexella Partners Ltd | Administrative & support | 2025 |
| Lexiglobal Interpreters Ltd | Professional & scientific | 2025 |
| Lexton Flooring Solutions Ltd | Construction | 2022 |
| Leyland Pipework Engineering Services Limited | Construction | 2014 |
| LF Thirteen Limited | Financial services | 2025 |
| LFC Logistics Limited | Transport & logistics | 2020 |
| LFL Haulage Limited | Transport & logistics | 2020 |
| LG Learning Adventures Limited | Education | 2024 |
| LG Project Services Limited | Information & communication | 2007 |
| LGM Solutions Ltd | Information & communication | 2010 |
| Lgnt Limited | Administrative & support | 2017 |
| Lgps Holdings Limited | Administrative & support | 2022 |
| LH Commercials Ltd | Wholesale & retail | 2023 |
| LH Properties (North West) Limited | Real estate | 2024 |
| LH Transport Services Limited | Transport & logistics | 2025 |
| LHC Property Management Ltd | Real estate | 2020 |
| LHE Data Consulting Limited | Professional & scientific | 2024 |
| LHH Investments Limited | Hospitality | 2007 |
| Lhsk LLP | | 2020 |
| Liam Harrison Training Limited | Other services | 2019 |
| Liamra Solutions Limited | Professional & scientific | 2015 |
| Liana Cafe Ltd | Hospitality | 2019 |
| Lias Industrial Limited | Professional & scientific | 2001 |
| Liberay Legal Limited | Professional & scientific | 2022 |
| Liberty Bytes Limited | Information & communication | 2025 |
| Liberty Installations Limited | Construction | 2017 |
| Liberty Path Solutions Ltd | Information & communication | 2025 |
| Liberty Property Solutions Ltd | Real estate | 2022 |
| Lidless Arts Ltd | Arts & recreation | 2019 |
| Life Chance Education Limited | Education | 2015 |
| Life Cycle Engineering Ltd | Professional & scientific | 2023 |
| Lifebridge Asend | Education | 2015 |
| Lifepro Ltd | Financial services | 2018 |
| Lifestyle 1.COM Ltd | Financial services | 2000 |
| Lifestyle Ecommerce Ltd | Wholesale & retail | 2021 |
| Lifetime Ceilings Limited | Construction | 2006 |
| Lifeway Properties Limited | Real estate | 2020 |
| Lifework Coaching Limited | Other services | 2022 |
| Liffey Blue Limited | Professional & scientific | 2017 |
| Liftech Garage Equipment Ltd | Professional & scientific | 2010 |
| Light Methods Limited | Information & communication | 2018 |
| Light Weight Group Limited | Arts & recreation | 2025 |
| Lightbound Foods Limited | Hospitality | 2025 |
| Lightest Night Limited | Information & communication | 2019 |
| Lighthouse Psychology & Therapy Services Limited | Health & social care | 2007 |
| Lightnetic Customs Ltd | Wholesale & retail | 2021 |
| Lightning Security Services Ltd | Administrative & support | 2022 |
| Lightweight Group Woodseats Limited | Arts & recreation | 2026 |
| Likes Global Ltd | Other services | 2025 |
| Lilac Cars Limited | Transport & logistics | 2018 |
| Lilacflint Ltd | Financial services | 2021 |
| Lilarose Care Limited | Extraterritorial | 2024 |
| Lilford Plant Ltd. | Wholesale & retail | 2010 |
| Lilirose Ltd | Wholesale & retail | 2025 |
| Lills Pizza Ltd | Hospitality | 2024 |
| Lilly's Dog Grooming Ltd | Arts & recreation | 2014 |
| Lilted Investments Limited | Financial services | 2021 |
| Lily and Sage Limited | Wholesale & retail | 2021 |
| Lily RK Limited | Real estate | 2011 |
| Lily Rose Advisory Limited | Administrative & support | 2021 |
| Lily's Cafee Ltd | Hospitality | 2024 |
| Lily's Little Gems Childcare Limited | Education | 2018 |
| Lily-Conn Services Limited | Other services | 2018 |
| LILY2SHOES Limited | Wholesale & retail | 2025 |
| Lima Hand Car Wash Limited | Administrative & support | 2017 |
| Lima Holdings NW Ltd | Real estate | 2023 |
| Limar Trading Ltd | Wholesale & retail | 2010 |
| Limars Limited | Wholesale & retail | 2012 |
| Limbada Associates Limited | Professional & scientific | 2010 |
| Limbro Limited | Financial services | 2018 |
| Lime and Ginger Hair & Beauty Ltd | Other services | 2013 |
| Lime Assist Ltd | Wholesale & retail | 2019 |
| Lime Assistive Technology Limited | Wholesale & retail | 2014 |
| Lime Equities Ltd | Real estate | 2020 |