| Leicester Ventures Limited | Professional & scientific | 2026 |
| Leigh Golf Club Limited | Arts & recreation | 1956 |
| Leigh Judo Club | Arts & recreation | 2012 |
| Leigh Skip Works Limited | Real estate | 1944 |
| Leighton Mitchell Limited | Administrative & support | 2021 |
| Lema Holdings Limited | Professional & scientific | 2016 |
| Lemoignan Industries Ltd | Professional & scientific | 2007 |
| Lemon 33 Limited | Information & communication | 2024 |
| Lemoni Limited | Administrative & support | 2011 |
| Lemos Consultancy Limited | Information & communication | 2018 |
| Lemur Consulting Services Ltd | Information & communication | 2018 |
| Lena&Miko Ltd | Transport & logistics | 2021 |
| Lend a Key Properties Ltd | Real estate | 2024 |
| Lennon Brothers Ltd | Transport & logistics | 2026 |
| Lenoch Projects Limited | Administrative & support | 2018 |
| Lensite Limited | Administrative & support | 2025 |
| LEO Upholstery Limited | Professional & scientific | 2013 |
| LEO Ventures and Company (LVC) Ltd | Real estate | 2019 |
| Leo's Culcheth Ltd | Hospitality | 2022 |
| Leosa Limited | Information & communication | 2018 |
| Leox Associates Ltd | Administrative & support | 2024 |
| Lepservices Ltd | Professional & scientific | 2020 |
| Lerutan Technology Limited | Professional & scientific | 2007 |
| LES Yates Surveys Limited | Professional & scientific | 2013 |
| Lesley Mellor Education & Wellbeing Ltd | Education | 2026 |
| Lesley Patel Lettings Ltd | Real estate | 2021 |
| Less FUR More Play Limited | Other services | 2022 |
| Leszczynscy-Grigg Enterprises Limited | Information & communication | 2016 |
| LET ME Sing Productions Limited | Arts & recreation | 2024 |
| LET N Sell Limited | Real estate | 2020 |
| LET the Light in Productions Limited | Information & communication | 2026 |
| Let's BE Kids Limited | Health & social care | 2017 |
| Let:Buy Limited | Real estate | 2016 |
| Lets Plan Meals Limited | Information & communication | 2020 |
| Letti Group Ltd | Information & communication | 2025 |
| Lettice Limited | Administrative & support | 2022 |
| Levchenko Electrics Limited | Professional & scientific | 2017 |
| Levchyk Ltd | Professional & scientific | 2018 |
| Level UP Leisure Limited | Information & communication | 2023 |
| Leven Contracts Ltd | Administrative & support | 2025 |
| Levens Properties Ltd | Real estate | 2024 |
| Leverage Lifestyle Limited | Wholesale & retail | 2026 |
| Levi Enforcement & Security Ltd | Administrative & support | 2021 |
| Levi Solutions Ltd | Administrative & support | 2019 |
| Levidar Ltd | Administrative & support | 2014 |
| Lewandowski R&D Services Limited | Administrative & support | 2015 |
| Lewis (Cheshire) Holdings Ltd | Real estate | 2020 |
| Lewis Bros (Warrington) Limited | Manufacturing | 2018 |
| Lewis James Properties Ltd | Construction | 2019 |
| Lewis Legal Education Limited | Education | 2025 |
| Lewis Legal Ltd | Administrative & support | 2021 |
| Lewis's Steel Services Ltd | Manufacturing | 2023 |
| Lewis-Cordwell Consultants Limited | Administrative & support | 2013 |
| Lewis-Meek Holdings Limited | Financial services | 2024 |
| Lewis-Meek Property Services Ltd | Real estate | 2021 |
| Lexelle Consult Ltd | Professional & scientific | 2016 |
| Lexicon Professional Services Ltd | Information & communication | 2006 |
| Leyburn Engineering Limited | Administrative & support | 2013 |
| Leyland Surfacing Ltd | Construction | 2020 |
| LF Initiatives Limited | Construction | 2017 |
| LFG Management Ltd | Information & communication | 2015 |
| LFM Transport Ltd | Transport & logistics | 2020 |
| LGF Joinery and Building Ltd | Construction | 2025 |
| Lgfc Limited | Hospitality | 2021 |
| LGI UK Limited | Wholesale & retail | 2004 |
| LGL MEP Services Ltd | Construction | 2020 |
| LGS Airtightness Limited | Administrative & support | 2025 |
| LGV Driver Hire Ltd. | Transport & logistics | 2019 |
| LH (88) Property Holdings Limited | Real estate | 2019 |
| LH Building Control Compliance Services Ltd | Professional & scientific | 2026 |
| LH Care 5 Limited | Health & social care | 2021 |
| LH Care Limited | Health & social care | 2015 |
| LH Project Management Limited | Other services | 2018 |
| LH Software Ltd | Information & communication | 2014 |
| LHM Surveying Limited | Administrative & support | 2024 |
| LIA Trans Ltd | Transport & logistics | 2017 |
| Liam Kirkham Technical Services Ltd | Hospitality | 2024 |
| Liam Philip Stubbs (LPS) Automotive Limited | Professional & scientific | 2016 |
| Liam Rogers Hospitality Limited | Hospitality | 2021 |
| Liberation Street Ltd | Arts & recreation | 2024 |
| Liberty Bell Coffee Limited | Hospitality | 2018 |
| Liberty Bidco UK Limited | Financial services | 2016 |
| Liberty Commercial Limited | Administrative & support | 2019 |
| Liberty Contracts NW Ltd | Real estate | 2019 |
| Liberty Estates NW Ltd | Real estate | 2025 |
| Liberty in Love Limited | Wholesale & retail | 2009 |
| Liberty Midco 3 Limited | Financial services | 2016 |
| Liberty Phoenix Limited | Administrative & support | 2014 |
| Liberty Projects Limited | Construction | 2007 |
| Libra Management Ltd | Professional & scientific | 2022 |
| Libx Capital Ltd | Professional & scientific | 2023 |
| License AI Ltd | Information & communication | 2026 |
| Lichen Learning Limited | Administrative & support | 2024 |
| Lickle Ltd | Hospitality | 2024 |
| Life Coach @ Home Ltd | Administrative & support | 2019 |
| Life in Colour Coaching Ltd | Health & social care | 2014 |
| Life Light (Training) Limited | Professional & scientific | 2011 |
| Life Long Lets Ltd | Real estate | 2021 |
| Life-Goals Limited | Health & social care | 2003 |
| Lifecycle Properties Limited | Real estate | 2017 |