| Leah Rose Limited | Transport & logistics | 2018 |
| Lean Excel Ltd | Professional & scientific | 2011 |
| Lean People Services Limited | Administrative & support | 2021 |
| LEANAGILE101 Limited | Information & communication | 2025 |
| Leap Properties Ltd | Real estate | 2016 |
| Learn German Today Ltd | Education | 2021 |
| Learn Sign Language Limited | Education | 2008 |
| Learn to Breathe Ltd | Health & social care | 2022 |
| Learner Legal Motorcycles Ltd | Wholesale & retail | 2025 |
| Learnie Ltd | Education | 2024 |
| Learning Accelerators Limited | Education | 2019 |
| Learning and Skills Academy CIC | Education | 2019 |
| Learning Possibilities Limited | Administrative & support | 2007 |
| Learntowin Ltd | Education | 2017 |
| Leather and Sports Metropolis Ltd | Wholesale & retail | 2017 |
| Leather Lovers Studio UK Ltd | Manufacturing | 2024 |
| Leatherbiz.Com Limited | Information & communication | 2000 |
| Leatherick Limited | Wholesale & retail | 2018 |
| Leathersoul Ltd Ltd | Manufacturing | 2025 |
| Ledger Hub Limited | Professional & scientific | 2021 |
| LEE and Tate Brickwork Limited | Construction | 2016 |
| LEE Garden Long Buckby Ltd | Hospitality | 2026 |
| LEE Hewlett Building Services Limited | Construction | 2019 |
| LEE Mynard Limited | Construction | 2019 |
| LEE Stewart Holdings Ltd | Transport & logistics | 2017 |
| LEE Warren Electrical Contractors Limited | Construction | 2015 |
| Lee-Ni PVT Ltd | Hospitality | 2013 |
| Leea Painting Limited | Construction | 2023 |
| Leeco-Energy Limited | Wholesale & retail | 2023 |
| Leeco-Riders Limited | Wholesale & retail | 2021 |
| Leeds Smith Consulting Limited | Transport & logistics | 2003 |
| Leeshared Homes Ltd | Health & social care | 2023 |
| Legacy Asset Finance Ltd | Wholesale & retail | 2022 |
| Legacy Services Limited | Health & social care | 2016 |
| Legacy Wood & Works Ltd | Construction | 2025 |
| Legal Pages Limited | Professional & scientific | 2021 |
| Legal Services Direct Ltd | Professional & scientific | 2023 |
| Legato Legal Services Limited | Professional & scientific | 2007 |
| Legend Expeditions Ltd | Administrative & support | 2023 |
| Legit Drivers Limited | Transport & logistics | 2026 |
| Legwork Marketing Services Limited | Professional & scientific | 2003 |
| Leicester Event Medical Ltd | Health & social care | 2015 |
| Leicester Parade Management Company Limited | Households | 1994 |
| Leicester Plastering Limited | Construction | 2017 |
| Leigh Court Close Limited | Administrative & support | 2004 |
| Leighton Buzzard 10 Renewables Limited | Professional & scientific | 2023 |
| Leikarai Ltd | Construction | 2016 |
| Leisure & Home Interiors Ltd | Wholesale & retail | 2020 |
| Leisure Measured Ltd | Professional & scientific | 2020 |
| Leka Recovery Ltd | Wholesale & retail | 2025 |
| Lekker 2 B Lekker Ltd | Professional & scientific | 2024 |
| Lekyb Solutions Limited | Administrative & support | 2017 |
| Lelm Ltd | Professional & scientific | 2025 |
| Lema Care Ltd | Administrative & support | 2025 |
| Lemmerbell Limited | Real estate | 1973 |
| Lemmie Games Limited | Information & communication | 2023 |
| Lemon Finca Limited | Hospitality | 2025 |
| Lemon Sherbet Limited | Manufacturing | 2021 |
| Lemon Tree Events Ltd | Hospitality | 2024 |
| Lempton Ltd | Health & social care | 2014 |
| Lenada Ltd | Information & communication | 2016 |
| Lenart Motors Ltd | Wholesale & retail | 2017 |
| Leng Medical Ltd | Health & social care | 2021 |
| Lengard Limited | Construction | 1964 |
| Lennard Greig Accounting Limited | Professional & scientific | 2025 |
| Lennon Photo Co Limited | Professional & scientific | 2015 |
| LEO Brokers Ltd | Transport & logistics | 2013 |
| LEO Twins Music Ltd | Information & communication | 2021 |
| Leoan Express Ltd | Transport & logistics | 2023 |
| Leonard Hall Associates Limited | Professional & scientific | 2002 |
| Leonard Lane Property & Consultancy Services Ltd | Real estate | 2026 |
| Leonydas Ltd | Wholesale & retail | 2026 |
| Leopard Gate Property Limited | Real estate | 2024 |
| Leopatraa Limited | Health & social care | 2024 |
| Leosleo Transport Limited | Wholesale & retail | 2024 |
| Leota's Lounge Ltd | Hospitality | 2025 |
| Leova.Net Limited | Information & communication | 2013 |
| Lerato Solutions Ltd | Professional & scientific | 2019 |
| Lerca Limited | Hospitality | 2019 |
| LES Poussins (Milton Keynes) CIC | Education | 2015 |
| Leshone Limited | Information & communication | 2021 |
| Leslie - Business Coaching and Personal Development Ltd | Professional & scientific | 2024 |
| Less Than 1% Ltd | Real estate | 2013 |
| LET ME NOW Online Limited | Real estate | 2013 |
| Let's Go Splash! Limited | Administrative & support | 2011 |
| Leteast Ltd | Real estate | 2023 |
| Letech International Ltd | Manufacturing | 2019 |
| Lethal Theory Ltd | Information & communication | 2016 |
| Lets Instruct Limited | Education | 2010 |
| Lets Start Building Ltd | Construction | 2021 |
| Letterbox Traders Limited | Information & communication | 2016 |
| Letterpress Workshop Limited | Manufacturing | 2023 |
| Letts Entertainment Ltd | Administrative & support | 2026 |
| Letts Go Gardening Services Ltd | Administrative & support | 2011 |
| Lettuce Property Management Limited | Real estate | 2012 |
| LEV Training Limited | Extraterritorial | 2020 |
| Levadent Ltd | Health & social care | 2020 |
| Levalux Limited | Transport & logistics | 2018 |
| Level Expert Scaffolding Ltd | Construction | 2024 |
| Levelux Limited | Other services | 2022 |