| LEE Smith Street Limited | Real estate | 2005 |
| Lee.C.Nc Limited | Manufacturing | 2017 |
| Leejax Limited | Agriculture & fishing | 2025 |
| Leemar Property Limited | Real estate | 2022 |
| Leeswood Limited | Professional & scientific | 1994 |
| Legacy Independent Funeral Directors Ltd | Other services | 2010 |
| Legal Disrepair Surveyors Ltd | Real estate | 2018 |
| Legal Surveying Solutions Ltd | Administrative & support | 2024 |
| Legally Blonde Lawyers Limited | Professional & scientific | 2017 |
| Legalosophy Limited | Professional & scientific | 2016 |
| Legend Barber 2 Ltd | Other services | 2025 |
| Leisure Electronics Holdings Limited | Financial services | 2017 |
| Leisure Electronics Limited | Arts & recreation | 2000 |
| Leisure Infrastructure Group Ltd | Manufacturing | 2017 |
| Leisure Safety Services Limited | Professional & scientific | 2011 |
| Leisure Sales & Services Limited | Information & communication | 2008 |
| Leisure Vans Ltd | Manufacturing | 2017 |
| Leisureloop Ltd | Water & waste | 2023 |
| Leksi Limited | Administrative & support | 2025 |
| Lelley Barns Ltd | Hospitality | 2021 |
| Lemina Recycling Ltd | Wholesale & retail | 2015 |
| LEN Beck & SON Limited | Wholesale & retail | 1974 |
| Lenco Scaffold Limited | Construction | 2025 |
| Lennonyoung Ltd | Construction | 2026 |
| Lenny's PUB Limited | Hospitality | 2019 |
| Lenora Lounge Limited | Education | 2026 |
| Lenzing Fibers Limited | Manufacturing | 1929 |
| LEO & ANK Ltd | Water & waste | 2019 |
| LEO Haulage Ltd | Transport & logistics | 2024 |
| LEO Hull Limited | Wholesale & retail | 2025 |
| LEO Philanthropy Ltd | Administrative & support | 2025 |
| Leogo Travels Ltd | Professional & scientific | 2023 |
| Leomore Ltd | Health & social care | 2024 |
| Leonardos@Quayside Limited | Hospitality | 2010 |
| Leonards Limited | Real estate | 2025 |
| Leovi Transport Limited | Transport & logistics | 2016 |
| Lepus Living Ltd | Real estate | 2017 |
| LER Radiology Limited | Health & social care | 2024 |
| LES Holland Logistics (LHL) Ltd | Transport & logistics | 2014 |
| LES Peacock Trading Company Limited | Wholesale & retail | 2020 |
| Lessons 4 Life Limited | Public administration | 2017 |
| LET IT NOW Ltd | Real estate | 2024 |
| LET Loose Yorkshire Limited | Arts & recreation | 2023 |
| Lets Clean Hull Ltd | Administrative & support | 2025 |
| Lets Flooring Hull Limited | Wholesale & retail | 2024 |
| Lets Go Properties Ltd | Real estate | 2020 |
| Lets Rent Hull Limited | Real estate | 2020 |
| Letterbox House Ltd | Arts & recreation | 2025 |
| Leurn Ltd | Information & communication | 2026 |
| Levatrix Ltd | Information & communication | 2025 |
| Level Systems Ltd | Professional & scientific | 2014 |
| LEVEL4 IT Solutions Ltd | Information & communication | 2024 |
| Levelmint Limited | Administrative & support | 1999 |
| Levels Properties Limited | Construction | 2019 |
| Levels Residential Ltd | Real estate | 2022 |
| Levelup Driving School Ltd | Education | 2020 |
| Levi Houses Limited | Real estate | 2025 |
| Levifly Limited | Administrative & support | 2025 |
| Levs Music Ltd | Administrative & support | 2016 |
| Lewie Coyle Football Academy Limited | Arts & recreation | 2023 |
| Lewie Coyle Foundation Community Interest Company | Arts & recreation | 2026 |
| Lewis Ashley Construction Limited | Construction | 2025 |
| Lewis Ashley Developments Limited | Construction | 2003 |
| Lewis Ashley Modular Limited | Construction | 2025 |
| Lewis Ashley Services Limited | Construction | 2003 |
| Lewis Smith Wind Limited | Professional & scientific | 2026 |
| Lexiprint Limited | Manufacturing | 1985 |
| Lexpro Thinktank Ltd | Hospitality | 2025 |
| Leybournemorris Group Limited | Real estate | 2020 |
| Lezzet 1 Ltd | Extraterritorial | 2023 |
| LFS Joinery Limited | Extraterritorial | 2023 |
| LGC Supplies Limited | Wholesale & retail | 2003 |
| LGT Wind Limited | Manufacturing | 2025 |
| LH Accountants Ltd | Professional & scientific | 2021 |
| LH Hedon Limited | Hospitality | 2022 |
| LH Telecoms Consulting Ltd | Information & communication | 2025 |
| LH Telecoms Limited | Information & communication | 2019 |
| LH10 Investments Ltd | Real estate | 2024 |
| LHM Property Solutions Ltd | Construction | 2022 |
| Liam Prasath Ltd | Wholesale & retail | 2023 |
| Liberty Assessments Ltd | Administrative & support | 2025 |
| Liberty Lane Consulting Limited | Information & communication | 2023 |
| Libra Lifestyle Limited | Households | 2008 |
| Library of Stuff CIC | Other services | 2019 |
| Lida Square Pizza Ltd | Hospitality | 2024 |
| Lidar Scanning London Limited | Professional & scientific | 2025 |
| Lidus Consulting Ltd | Professional & scientific | 2022 |
| Liefern Global Services UK Limited | Wholesale & retail | 2026 |
| Lieu Hung Limited | Other services | 2021 |
| Life Consults CIC | Professional & scientific | 2023 |
| Life for a KID Foundation Ltd | Other services | 2009 |
| Life Link Biologicals Limited | Other services | 2016 |
| Life Skills Hub Holdings Limited | Financial services | 2025 |
| Life Skills Hub Limited | Education | 2021 |
| Lifehackr Ltd | Information & communication | 2025 |
| Lifted Horse Box Hire Ltd | Administrative & support | 2025 |
| Lifted Services Limited | Professional & scientific | 2019 |
| Liftplan Pro Ltd | Construction | 2025 |
| Light and Scent Ltd | Wholesale & retail | 2020 |
| Light Bearers Project Ltd | Education | 2024 |