| Lexden Logistics Ltd | Transport & logistics | 2014 |
| Lexicon Serv Limited | Professional & scientific | 2024 |
| Lexicon Services Ltd | Administrative & support | 2025 |
| Lexington Park Investments Ltd | Real estate | 2017 |
| Lexique Content Ltd | Professional & scientific | 2019 |
| Lexis Lighting International Ltd | Wholesale & retail | 2017 |
| Lexmark UK PVT Ltd | Manufacturing | 2020 |
| Leyco+ Limited | Real estate | 2022 |
| Leyden Consulting Ltd | Administrative & support | 2015 |
| Leyla's Jewellery Ltd | Manufacturing | 2024 |
| Leyton Beauty Therapy Limited | Other services | 2019 |
| Leyton Mills Tea Ltd | Hospitality | 2026 |
| Leytonstone Halal Meat Ltd | Manufacturing | 2018 |
| Leytonstone Transport Ltd | Transport & logistics | 2014 |
| Lezant Ltd | Transport & logistics | 2015 |
| LFC Beauty Salon Ltd | Other services | 2022 |
| LFC Traders Ltd | Manufacturing | 2022 |
| LFI Kitchens and Bedrooms Limited | Construction | 2006 |
| LFW Investments Limited | Real estate | 2024 |
| LG Heating and Mechanical Ltd | Construction | 2020 |
| LG Innovations Ltd | Professional & scientific | 2023 |
| LG Logistics Ltd | Transport & logistics | 2018 |
| LG Properties Devopment Ltd | Construction | 2022 |
| LG Sewing Machines Limited | Wholesale & retail | 2011 |
| LG Willowbrook Ltd | Financial services | 2022 |
| LGG Transport Ltd | Transport & logistics | 2020 |
| Lghthouse Recruitment Limited | Administrative & support | 2026 |
| LGN Properties Limited | Real estate | 2023 |
| LGS Enterprises Ltd | Hospitality | 2007 |
| LGS Trading Ltd | Wholesale & retail | 2026 |
| LH Delight Ltd | Hospitality | 2025 |
| LH Joinery Ltd | Construction | 2015 |
| LH Laher Consultancy Ltd. | Administrative & support | 2015 |
| LHA Consulting Limited | Professional & scientific | 2012 |
| LHL International Services Ltd | Transport & logistics | 2026 |
| LHR Logistics Ltd | Transport & logistics | 2019 |
| Lhrco Ltd | Hospitality | 2016 |
| Lhsbm Ltd | Professional & scientific | 2012 |
| LI Cleaning Solutions Ltd | Administrative & support | 2024 |
| LIA Relief Trust | Health & social care | 2013 |
| Liam Kyle Limited | Construction | 2014 |
| Liam Pham Ltd | Other services | 2024 |
| Liam Restaurant Ltd | Hospitality | 2026 |
| Liam Short Limited | Administrative & support | 2017 |
| Lian Elise Limited | Professional & scientific | 2013 |
| Lian Services Ltd | Wholesale & retail | 2018 |
| Lianark Ltd | Health & social care | 2024 |
| Liani Limited | Wholesale & retail | 2018 |
| Libas Al-Taqwa Boutique Ltd | Other services | 2024 |
| Liberi Bidco Limited | Financial services | 2024 |
| Liberi Finco 1 Limited | Financial services | 2024 |
| Liberi Finco 2 Limited | Financial services | 2024 |
| Liberi Midco Limited | Financial services | 2024 |
| Liberi Nominee Limited | Financial services | 2024 |
| Liberi Topco Limited | Financial services | 2024 |
| Libertas Capital Corporate Finance Limited | Financial services | 2001 |
| Liberty and Honey Limited | Wholesale & retail | 2020 |
| Liberty Diner Limited | Hospitality | 2022 |
| Liberty Frozen Foods Limited | Wholesale & retail | 2021 |
| Liberty Hair and Beauty Ltd | Wholesale & retail | 2020 |
| Liberty HSC Limited | Health & social care | 2014 |
| Liberty Immigration Services Limited | Other services | 2011 |
| Liberty International Properties Limited | Real estate | 2022 |
| Liberty Panda Limited | Wholesale & retail | 2017 |
| Libin Properties Limited | Real estate | 2022 |
| Licensed Apparel Limited | Wholesale & retail | 2016 |
| Lidar Holdings Ltd | Professional & scientific | 2024 |
| Lidar Properties Ltd | Real estate | 2018 |
| Life After Public Service Ltd | Manufacturing | 2024 |
| Life Armour Ltd | Wholesale & retail | 2019 |
| Life Care Group UK Ltd | Health & social care | 2023 |
| Life Changing Care Ltd | Administrative & support | 2015 |
| Life Hack Apps Ltd | Information & communication | 2026 |
| Life MAT Services Ltd. | Administrative & support | 2012 |
| Life Medic Limited | Health & social care | 2018 |
| Life Multi-Academy Trust | Education | 2012 |
| Life on the Road Ltd | Transport & logistics | 2020 |
| Life Properties Ltd | Real estate | 2017 |
| Life Pyramids Travel Ltd | Transport & logistics | 2025 |
| Life Stylist - Katrina Wong Limited | Administrative & support | 2014 |
| Life Tabernacle CIC | Other services | 2014 |
| LIFE4EVER H.C.S. Ltd | Health & social care | 2015 |
| LIFE4U Ltd | Administrative & support | 2023 |
| Lifecare Facilities Ltd | Real estate | 2024 |
| Lifeful Care Services Ltd | Health & social care | 2023 |
| Lifelia Ltd | Other services | 2022 |
| Lifelia UK Ltd | Extraterritorial | 1998 |
| Lifeline Movers and Packers Ltd | Transport & logistics | 2022 |
| Lifely Services Ltd | Information & communication | 2026 |
| Lifequest Ltd | Professional & scientific | 2024 |
| LIFES2GOOD (UK) Limited | Wholesale & retail | 2002 |
| Lifescollars Ltd | Wholesale & retail | 2024 |
| Lifestream Floatation and Wellness Centre Limited | Arts & recreation | 2016 |
| Lifestyle Enterprises Ltd | Wholesale & retail | 2022 |
| Lifestyle Group Properties Limited | Real estate | 2021 |
| Lifestyle With Khans Ltd | Construction | 2023 |
| Lifestyler Limited | Health & social care | 2024 |
| Lifestyling Services Ltd | Administrative & support | 2006 |
| Lifetouch Technology LP | | 2018 |
| Lifetron Properties DS01 Limited | Real estate | 2024 |