| Lowesby Investments Limited | Wholesale & retail | 2000 |
| Lowrence LRE UK Limited | Transport & logistics | 2021 |
| Lowther Living Ltd | Financial services | 2025 |
| Loxleigh Investments Limited | Construction | 2011 |
| Loyal & Sons Limited | Manufacturing | 1991 |
| Loyal Holdings Limited | Financial services | 2016 |
| Loyal Parcel Service (Leicester) Limited | Transport & logistics | 2019 |
| Loyal Properties Ltd | Real estate | 2021 |
| Loyalboost Ltd | Administrative & support | 2025 |
| Loydall's Asset Management Ltd | Financial services | 2015 |
| Loyiso Limited | Health & social care | 2010 |
| LP SD Fifty Eight Limited | Wholesale & retail | 2023 |
| LP Stocks UK Ltd | Manufacturing | 2024 |
| LPC Lettings Limited | Real estate | 2025 |
| Lpcdh Games Limited | Wholesale & retail | 2021 |
| Lpco Group Ltd | Wholesale & retail | 2025 |
| Lpct Cuisine Ltd | Hospitality | 2025 |
| LPD Brands Limited | Financial services | 2023 |
| LPE Fabrication & Installation U.K Limited | Manufacturing | 2014 |
| LPE Powder Coating U.K Limited | Manufacturing | 2014 |
| LPF (2014) Limited | Administrative & support | 2014 |
| LPG Education Ltd | Health & social care | 2023 |
| LPH Graphics Ltd | Manufacturing | 2021 |
| LPO Healthcare Ltd | Health & social care | 2018 |
| LPS Hpac Ltd | Construction | 2024 |
| LPS Properties Limited | Real estate | 2013 |
| LQ Steel Fixing Ltd | Construction | 2024 |
| LR Cleaning Midlands Limited | Administrative & support | 2024 |
| Lralc Limited | Other services | 2018 |
| LRB Electrical & Solar Solutions Ltd | Construction | 2011 |
| LRC Services Ltd | Manufacturing | 2023 |
| Lrcls Limited | Information & communication | 2018 |
| LRCONSTRUCTION24 Ltd | Construction | 2025 |
| Lrdg Consulting Limited | Other services | 2023 |
| LRE Property Maintenance Ltd | Construction | 2023 |
| LRF Roofing Services Ltd | Construction | 2021 |
| LRG Fashion Ltd | Wholesale & retail | 2026 |
| LRG Holdings Ltd | Professional & scientific | 2025 |
| LRG Marketing Ltd | Professional & scientific | 2025 |
| Lrgimage Limited | Professional & scientific | 1997 |
| LRL Group Ltd | Financial services | 2024 |
| LRL UK Fashion Limited | Wholesale & retail | 2025 |
| LRL UK Sourcing Limited | Wholesale & retail | 2025 |
| LRM Recoveries Ltd | Transport & logistics | 2024 |
| Lrmc Ltd | Real estate | 2026 |
| LRN2LEAD CIC | Health & social care | 2025 |
| LS Investing Ltd | Real estate | 2019 |
| LS Medics Ltd | Health & social care | 2018 |
| LS Online Store Ltd | Wholesale & retail | 2025 |
| LSB Partners Ltd | Construction | 2026 |
| LSB Property Service Ltd | Real estate | 2024 |
| LSH Publish Ltd. | Information & communication | 2004 |
| LSH Recordings Ltd | Information & communication | 2003 |
| LSH Security Ltd | Administrative & support | 2022 |
| LSI Renovations Ltd | Real estate | 2025 |
| LSK Holdings Limited | Health & social care | 2016 |
| LSP Imports -Manufacturers Ltd | Manufacturing | 2021 |
| LSP Imports Limited | Wholesale & retail | 2017 |
| LSR Property Care Limited | Construction | 2010 |
| Lstr Ltd | Health & social care | 2022 |
| Lsvs Holdings Ltd | Financial services | 2022 |
| LT Design and Project Management Limited | Professional & scientific | 2020 |
| LT Electrical (Leicester) Ltd | Construction | 2022 |
| LT Landscapes Ltd | Administrative & support | 2021 |
| LT Maintenance Ltd | Construction | 2015 |
| LT Property Investments (Leicester) Ltd | Real estate | 2026 |
| LTB Global Finance Ltd | Financial services | 2022 |
| Ltde Ltd | Wholesale & retail | 2015 |
| LTM Couriers Limited | Transport & logistics | 2018 |
| LTX Communications Ltd | Construction | 2022 |
| Lubbesthorpe Alive CIC | Health & social care | 2020 |
| Lubby's Professional Cleaners Ltd | Administrative & support | 2023 |
| Lucarne Ltd | Information & communication | 2017 |
| Lucas Fire and Security Limited | Administrative & support | 2011 |
| Lucas Grant Lettings Ltd | Real estate | 2011 |
| Luceda Property Acquisitions Ltd | Real estate | 2025 |
| Lucenti Enterprises Ltd | Wholesale & retail | 2023 |
| Luchata Limited | Real estate | 2022 |
| Luciano Retail Ltd | Wholesale & retail | 2026 |
| Luckman Limited | Hospitality | 2018 |
| Luckman Stores Ltd | Hospitality | 2025 |
| Lucky 13 Tattoo Ltd | Arts & recreation | 2022 |
| Lucky 18 Ltd | Manufacturing | 2021 |
| Lucky 76 Ltd | Administrative & support | 2025 |
| Lucky ATU Ltd | Other services | 2020 |
| Lucky Celebrations Ltd | Real estate | 2013 |
| Lucky Cooperations Limited | Financial services | 2023 |
| Lucky Dragon Food Ltd | Hospitality | 2022 |
| Lucky Kids Community Interest Company | Health & social care | 2016 |
| Lucky Leicester Supermarket Ltd | Wholesale & retail | 2024 |
| Lucky Software Ltd | Information & communication | 2022 |
| Lucky Strike Amusements Limited | Hospitality | 2017 |
| Lucky Supermarket Limited | Real estate | 2003 |
| Lucky Two Yard Ltd | Construction | 2025 |
| Luckybear Trans Ltd | Transport & logistics | 2017 |
| Lucodify Ltd | Information & communication | 2020 |
| Lucy Bowen-King Limited | Extraterritorial | 2025 |
| Lucy Fawcett Ltd | Real estate | 2026 |
| Lucy Heaton Wellbeing Ltd | Professional & scientific | 2024 |
| Lucyya Services Ltd | Administrative & support | 2026 |