| Leach Engineering Limited | Professional & scientific | 2018 |
| Leading Travel Limited | Transport & logistics | 2025 |
| Leah Charles Limited | Administrative & support | 2013 |
| Leahu Transport Limited | Transport & logistics | 2018 |
| Learnfastapp Ltd | Information & communication | 2024 |
| Learning Partner Solutions Ltd | Professional & scientific | 2022 |
| Learntime Ltd | Education | 2023 |
| Lecsoft Ltd | Wholesale & retail | 2011 |
| LED Trans Limited | Transport & logistics | 2019 |
| LEE Calman Ltd | Professional & scientific | 2025 |
| LEE on Trading Ltd | Wholesale & retail | 2014 |
| LEE Smithson Formwork Ltd | Construction | 2026 |
| Leen Services Limited | Professional & scientific | 1999 |
| Legacy Business Investments Ltd | Financial services | 2020 |
| Legendury Beatz Entertainment Ltd. | Arts & recreation | 2017 |
| Leicester Court (Bulkington) Limited | Households | 1972 |
| Leicester Fire Systems Ltd | Construction | 2016 |
| Leicestershire Independent Educational Trust | Education | 1983 |
| Leigh Gayes Limited | Real estate | 2015 |
| Leigh Morris Electrical Limited | Construction | 2003 |
| Leisure Avenues Limited | Hospitality | 2005 |
| Leisure Security Training Organisation Ltd | Education | 2025 |
| Lendon & Wilson Limited | Professional & scientific | 2019 |
| Leniks Motor Panels Limited | Manufacturing | 2001 |
| Lennon Mills Limited | Information & communication | 2025 |
| Lenza World Limited | Other services | 2020 |
| Leon Systems Limited | Professional & scientific | 2025 |
| Lesland Ltd | Other services | 2022 |
| Lesscost Solutions Ltd | Construction | 2023 |
| Let's Go Swish CIC | Wholesale & retail | 2025 |
| LETME123 Limited | Professional & scientific | 2011 |
| Level UP Concrete Ltd | Manufacturing | 2024 |
| Level UP Renovation Ltd | Construction | 2024 |
| Level UP Tyres Ltd | Wholesale & retail | 2025 |
| Lewi Investments Ltd | Real estate | 2021 |
| Lewis Consulting Group Ltd | Real estate | 2013 |
| Lewis Pointon (Nuneaton) Ltd | Real estate | 2008 |
| Leybourne Renewables Ltd | Construction | 2024 |
| Leyland Gardens Management Company (Nuneaton) Limited | Households | 2021 |
| LFJ Fleet Repairs Limited | Transport & logistics | 2025 |
| LFL Management Ltd | Extraterritorial | 2009 |
| LGD Homes Ltd | Real estate | 2022 |
| LH & Sons Property Maintenance Ltd | Construction | 2025 |
| Liam Griffin Financial Services Ltd | Financial services | 2026 |
| Libaya Cuisine Ltd | Hospitality | 2024 |
| Libra Projects Ltd | Professional & scientific | 2011 |
| Licorish Creative Limited | Professional & scientific | 2018 |
| Life Assembly Limited | Manufacturing | 2022 |
| Lifeonthego Limited | Wholesale & retail | 2013 |
| Lifeplan Ltd | Education | 2024 |
| Lightening the Load Ltd | Health & social care | 2025 |
| Lightique Limited | Manufacturing | 1986 |
| Lightpulse Limited | Manufacturing | 2012 |
| Lightwater Productions Limited | Construction | 2017 |
| Like Investments Limited | Wholesale & retail | 2004 |
| Likemba Pilates Studio Limited | Arts & recreation | 2024 |
| Lila Courier Ltd | Transport & logistics | 2021 |
| Lilley-Waddington Limited | Wholesale & retail | 1936 |
| Lilted Stays Ltd | Real estate | 2025 |
| Lilys Care Ltd | Health & social care | 2015 |
| Limbu Homes Ltd | Real estate | 2026 |
| Lime Groves Properties Limited | Real estate | 2025 |
| Lime Wholesale Ltd | Wholesale & retail | 2023 |
| Limitless Global C.I.C. | Administrative & support | 2024 |
| Limo Hire Nuneaton Ltd | Transport & logistics | 2024 |
| Linchpin Plant Ltd | Professional & scientific | 2015 |
| Lincos Pet Supplies Ltd | Wholesale & retail | 2021 |
| Lindian Associates Limited | Information & communication | 2012 |
| Lindley Hall Farms Limited | Agriculture & fishing | 1976 |
| Linear AMP UK Ltd | Extraterritorial | 2017 |
| Linear Contracts Ltd | Construction | 2020 |
| Linear Portfolio Ltd | Real estate | 2024 |
| Lingy Ltd | Professional & scientific | 2016 |
| Listening Space Therapy Limited | Health & social care | 2025 |
| Litecast Holdings Ltd | Financial services | 2019 |
| Litecast Limited | Manufacturing | 1998 |
| Litecast Properties Limited | Real estate | 2019 |
| Little and Great Adventures Ltd | Administrative & support | 2026 |
| Little Blossoms Nuneaton Limited | Health & social care | 2018 |
| Little Glendalers Pre-School Limited | Education | 2006 |
| Little Learners Day Nursery Camp Hill Ltd | Education | 2016 |
| Little Learners Holdings Ltd | Financial services | 2024 |
| Little Star Nanny Ltd | Health & social care | 2023 |
| Little Wins Therapy Ltd | Health & social care | 2026 |
| Littlecleaningcompany Limited | Administrative & support | 2026 |
| Live LX Limited | Arts & recreation | 2012 |
| Liverpool Harbour Ltd | Real estate | 2018 |
| Livewell London Limited | Real estate | 2026 |
| Living Wild Ltd | Wholesale & retail | 2024 |
| Liviu Spedition Ltd | Transport & logistics | 2018 |
| LIZ Taylor Lettings Ltd | Real estate | 2019 |
| LJ Carpets & Underfoot Comforts Limited | Wholesale & retail | 2025 |
| Lj&T Ventures Ltd. | Health & social care | 2016 |
| Ljcarrecovery Ltd | Wholesale & retail | 2025 |
| LJD Property Ltd | Real estate | 2025 |
| LJR Catering Ltd | Hospitality | 2023 |
| LJS Contract Services Ltd | Administrative & support | 2023 |
| Lloyds Courier Service Ltd | Transport & logistics | 2026 |
| LMD Supply Chain Ltd | Professional & scientific | 2012 |
| LMG Online Limited | Professional & scientific | 2012 |