| Lawrence Sheriff School Academy Trust | Education | 2014 |
| Lawrence Walker Limited | Professional & scientific | 1994 |
| Lawson & Deans Limited | Wholesale & retail | 2011 |
| Lawson - Blake Consulting Limited | Transport & logistics | 2016 |
| Lazzo Rocco Limited | Wholesale & retail | 2024 |
| LB Inc Transport Limited | Transport & logistics | 2012 |
| LBC Lash Ltd | Other services | 2026 |
| LC Hair and Tanning Ltd | Other services | 2024 |
| LCN Projects Limited | Wholesale & retail | 1997 |
| LCR Living & Co Ltd | Real estate | 2024 |
| LDP Consultancy Services Limited | Professional & scientific | 2024 |
| LDR Resources Limited | Transport & logistics | 2012 |
| LE Chateau X Limited | Health & social care | 2017 |
| LE Glamour UK Ltd | Wholesale & retail | 2018 |
| LEA Enterprises Limited | Real estate | 2021 |
| Leader Systems (U.K.) Limited | Administrative & support | 1989 |
| Leader Systems LLP | | 2007 |
| Leading Care and Health Limited | Health & social care | 2014 |
| Leading Edge Consulting Services Limited | Information & communication | 2018 |
| Leafspine Limited | Information & communication | 2014 |
| Leahmay Aesthetics UK Ltd | Other services | 2026 |
| Leam Holdings Limited | Financial services | 2023 |
| Leam PMC Limited | Households | 2023 |
| Leam SPV Limited | Real estate | 2021 |
| Leam Valley Golf Centre Limited | Arts & recreation | 2000 |
| Lean Production Support Limited | Professional & scientific | 2015 |
| Learn 2 Shine C.I.C. | Education | 2013 |
| Learn for Change Ltd | Administrative & support | 2012 |
| Learnarama Limited | Education | 2019 |
| Lebada Ltd | Transport & logistics | 2018 |
| Lebe Limited | Information & communication | 2015 |
| Ledas Ltd | Transport & logistics | 2021 |
| LEE Accountancy Limited | Professional & scientific | 2018 |
| Leese Plumbing Ltd | Construction | 2023 |
| Legacy AP Limited | Transport & logistics | 2026 |
| Legal Claim Finance Ltd | Financial services | 2026 |
| Legal Medical Review Ltd | Health & social care | 2025 |
| Leicester Aesthetics Ltd | Other services | 2018 |
| Leicester Halland Limited | Administrative & support | 2013 |
| Leicestershire Waste & Recycling Solutions Ltd | Water & waste | 2026 |
| Lelleford Consultancy Ltd | Professional & scientific | 2024 |
| Lelu Management Ltd | Real estate | 2026 |
| Lemila Limited | Information & communication | 2011 |
| Lemrac Limited | Professional & scientific | 2014 |
| Lemuran Ltd | Wholesale & retail | 2026 |
| Leni Consulting Limited | Information & communication | 2008 |
| Lenoch Engineering Limited | Manufacturing | 2003 |
| LEO Flooring Specialist Limited | Construction | 2025 |
| Leona IT Solutions Ltd | Information & communication | 2022 |
| Leonesco Limited | Manufacturing | 2016 |
| Leonidas 355 Properties Ltd | Construction | 2024 |
| Leroiv Silviu Limited | Transport & logistics | 2018 |
| Lesjnewman Ltd | Transport & logistics | 2016 |
| LET Creative Limited | Real estate | 2026 |
| LET IQ Ltd | Households | 2024 |
| LET IT Legal Ltd | Professional & scientific | 2023 |
| LET IT Snow Limited | Professional & scientific | 2012 |
| Lettis Diner Limited | Hospitality | 2026 |
| Levnik Properties Ltd | Other services | 2020 |
| Lewandowski Electric Gating Systems Limited | Professional & scientific | 2025 |
| Lewandowski Team Limited | Wholesale & retail | 2014 |
| Lexmera Solutions Private Ltd | Information & communication | 2023 |
| Lexxdel Trans Ltd | Transport & logistics | 2019 |
| LF Home Maintenance Ltd | Construction | 2022 |
| LFM Construction Limited | Construction | 2025 |
| LG Recovery Limited | Wholesale & retail | 2025 |
| LGD Sweeper Ltd | Transport & logistics | 2022 |
| Lgpt Bootcamp Ltd | Arts & recreation | 2019 |
| LHS Future Design Ltd | Real estate | 2021 |
| LHS Futures Consultancy Ltd | Professional & scientific | 2024 |
| LHS Futures Holding Ltd | Financial services | 2024 |
| Lian Products Limited | Wholesale & retail | 2022 |
| Lian Property Limited | Real estate | 2022 |
| Lideli Ltd | Construction | 2016 |
| Life and Building Protection Services Ltd | Administrative & support | 2016 |
| Life Investments Limited | Real estate | 2004 |
| Life IS Ltd | Health & social care | 2013 |
| Life Mastery Ltd | Other services | 2025 |
| Life Stream Apps Ltd | Information & communication | 2017 |
| Lifebrooks Ltd | Wholesale & retail | 2024 |
| Lifecare Charitable Trust(The) | Health & social care | 1986 |
| Lifelab Testing Limited | Wholesale & retail | 2017 |
| Lifeline Protect Limited | Professional & scientific | 2013 |
| Lifeline Wills Trusts and Estate Planning Ltd | Professional & scientific | 2020 |
| Lift Training Ltd | Education | 2025 |
| Lighten UP Electrical Distributors Ltd | Wholesale & retail | 2020 |
| Lightning Dogs Limited | Other services | 2024 |
| Lightning Looms Limited | Manufacturing | 1999 |
| Lightquest Ltd | Administrative & support | 2004 |
| Lightweight Mobility & Seating Ltd | Wholesale & retail | 2022 |
| Lila Designs Ltd | Professional & scientific | 2021 |
| Lilbourne Thistle Limited | Professional & scientific | 2018 |
| Lilene Limited | Wholesale & retail | 2015 |
| Lilliput Childrens Day Nursery Limited | Education | 2009 |
| Lima Romeo International Limited | Transport & logistics | 2015 |
| Limak Trans Ltd | Transport & logistics | 2018 |
| Lime Farm Services Ltd | Manufacturing | 2003 |
| Limo Hire Rugby Ltd | Transport & logistics | 2024 |
| Lincolnshire Golf Lessons Ltd | Arts & recreation | 2025 |
| Lindsay Forrester Ltd | Professional & scientific | 2015 |