| Laurel Avenue Ltd | Real estate | 2025 |
| Laurelbank Living Limited | Real estate | 2026 |
| Laurie Thomas Ltd | Transport & logistics | 2025 |
| Lauzzo Ltd | Construction | 2018 |
| Lavelle & Huxley Property Limited | Real estate | 2025 |
| Lavender Barn Limited | Other services | 2016 |
| Lavender Wigan Road Management Company Limited | Households | 2023 |
| Lawless Theatre Works Ltd | Arts & recreation | 2023 |
| Lawrence Dawe Ltd | Financial services | 2025 |
| Lawries Landscapes Limited | Administrative & support | 2025 |
| Lawscan Limited | Information & communication | 2016 |
| Lawson Azam Holdings Limited | Financial services | 2021 |
| Lawson Drainage & Plumbing Ltd | Construction | 2015 |
| Laycock Gate Services Ltd | Real estate | 2019 |
| Lazar Capital Group Limited | Information & communication | 2025 |
| Lazor Transport Ltd | Transport & logistics | 2017 |
| LB Dunamis Limited | Professional & scientific | 2024 |
| LB Services Ltd | Professional & scientific | 2005 |
| LB42 Limited | Wholesale & retail | 2023 |
| Lbcbproperty Limited | Real estate | 2022 |
| LBD Direct Ltd | Transport & logistics | 2024 |
| Lbdf Ltd | Wholesale & retail | 2026 |
| LC Livestock Limited | Agriculture & fishing | 2026 |
| LCN Cleaning Solutions Ltd | Administrative & support | 2026 |
| LDA Training Ltd | Education | 2025 |
| LDJ Developments Ltd | Real estate | 2024 |
| Ldle Diagnostics Limited | Wholesale & retail | 2023 |
| LDM Holdings Limited | Financial services | 2020 |
| LE Cayla Management Limited | Households | 1992 |
| Leadershiip Limited | Education | 2024 |
| Leading Martial Arts Limited | Arts & recreation | 2022 |
| Lean & Green (Chorley) Limited | Hospitality | 2018 |
| Lean on ME Bar Company Ltd | Hospitality | 2021 |
| Lean on ME Consultants Ltd | Professional & scientific | 2013 |
| Leanne Jones Wealth Management Ltd | Financial services | 2026 |
| Learn Live Limited | Education | 2013 |
| Learning Global Ltd. | Education | 2016 |
| Leather Hides UK Ltd | Wholesale & retail | 2009 |
| Lechic Aesthetics & Beauty Ltd | Health & social care | 2016 |
| Lecks Logistics Ltd | Transport & logistics | 2024 |
| Lectus Solutions Ltd | Construction | 2026 |
| Leda Concrete Ltd | Construction | 2019 |
| LEE Cartmell Services Limited | Administrative & support | 2014 |
| LEE GEE 1 Limited | Transport & logistics | 2012 |
| LEE Murphy Surveys Limited | Other services | 2024 |
| Leedalt Ltd | Transport & logistics | 2015 |
| Leeds Seamen Ltd. | Hospitality | 2019 |
| Leehand Limited | Professional & scientific | 2002 |
| Leehand Properties Limited | Construction | 1991 |
| Legacy Creative Ltd | Wholesale & retail | 2025 |
| Legacy Gardens Ltd | Agriculture & fishing | 2024 |
| Legacy Renewables Ltd Ltd | Construction | 2018 |
| Legal Experience Limited | Professional & scientific | 2015 |
| Legal Partnership Group Limited | Administrative & support | 2023 |
| Leighbrow Limited | Financial services | 2013 |
| Leisureplan Investments Limited | Professional & scientific | 2004 |
| Leisureplan Limited | Public administration | 2002 |
| Leisureplan Projects Finance Limited | Construction | 2007 |
| Leisureplan Projects Limited | Construction | 2007 |
| Lemero Ltd | Wholesale & retail | 2023 |
| Lemor Electrical Ltd | Construction | 2013 |
| LEO Landscapes Ltd | Administrative & support | 2022 |
| LET ME NOW Ltd | Real estate | 2009 |
| Let's Glow Sensory Limited | Education | 2024 |
| Let's Make a Difference Community Interest Company | Construction | 2023 |
| Letch Medical Services Limited | Health & social care | 2019 |
| Letransporteur Ltd | Transport & logistics | 2018 |
| Levy Gera Tax Back Services Limited | Professional & scientific | 2021 |
| Lewco Meat Feeders Limited | Other services | 1961 |
| Lewis & Hill Services Ltd | Other services | 2018 |
| Lewis Heyes Garden Services Limited | Administrative & support | 2026 |
| Lewispierpoint Limited | Real estate | 2014 |
| Lexical Peregrine Limited | Financial services | 2025 |
| Lexis Properties Limited | Real estate | 2024 |
| Leyland Automotive Limited | Wholesale & retail | 2023 |
| Leyland Lane Wrought Iron Gates and Railings Limited | Construction | 2020 |
| LF Structures Ltd | Professional & scientific | 2023 |
| LFP Civil & Environmental Engineering Ltd | Construction | 2020 |
| LFP Consultants Limited | Professional & scientific | 2004 |
| LFP Environmental Limited | Construction | 2022 |
| LG Joinery Solutions Ltd | Construction | 2025 |
| LG Property Creations Ltd | Construction | 2024 |
| LG8 Products Limited | Wholesale & retail | 2023 |
| LGF Properties Limited | Real estate | 2016 |
| Lhbcs Ltd | Construction | 2020 |
| LHC Property Limited | Real estate | 2024 |
| Lhnw Ltd | Real estate | 2025 |
| LI Ping Ltd | Real estate | 2016 |
| LI Zhao Limited | Hospitality | 2017 |
| Liaison Legal Support Limited | Other services | 2007 |
| Liam Carroll Transport Limited | Transport & logistics | 2023 |
| Liam Leigh Drainage Ltd | Water & waste | 2025 |
| Liam O'Sullivan Transport Ltd | Transport & logistics | 2020 |
| Libereka Limited | Education | 2020 |
| LID Vision Limited | Manufacturing | 2011 |
| LIDDSINN470 Limited | Hospitality | 2023 |
| Life Quote Direct Limited | Financial services | 2016 |
| Lifelong Skills Limited | Education | 2012 |
| Lifespan Adhd Ltd. | Education | 2018 |
| Lifetime Financial Solutions (UK) Ltd | Financial services | 2011 |