| Librios Research Limited | Information & communication | 1994 |
| Life & Health Direct Limited | Extraterritorial | 1995 |
| Life and Sickness Solutions Limited | Financial services | 2015 |
| Life Changes 4 Good Limited | Information & communication | 2025 |
| Life Fount Ltd | Professional & scientific | 2015 |
| Life Imagined Ltd | Wholesale & retail | 2015 |
| Life IS Beautiful Music Ltd | Information & communication | 2022 |
| Life of Love Ltd | Wholesale & retail | 2023 |
| Life of Luxe Ltd | Extraterritorial | 2024 |
| Life Recordings Ltd | Arts & recreation | 2014 |
| Life Science Healthcare UK Limited | Wholesale & retail | 2018 |
| Life Skills Through Sport Limited | Arts & recreation | 2017 |
| Life Transformation Coaching Ltd | Professional & scientific | 2023 |
| Lifealike Limited | Hospitality | 2008 |
| Lifealike USA Ltd | Hospitality | 2012 |
| Lifecare Surgicals Ltd | Manufacturing | 2020 |
| Lifeplan International Ltd | Financial services | 2019 |
| Lifequbes UK Ltd | Wholesale & retail | 2018 |
| Lifestyle Financial Choices Limited | Financial services | 2003 |
| Life’S Little Cover Ltd | Financial services | 2020 |
| Lift Gym MK Ltd | Arts & recreation | 2025 |
| Lift Truck Services Limited | Administrative & support | 2000 |
| Light RAY Technologies Ltd | Manufacturing | 2025 |
| Light Supply Electrical Services Ltd | Construction | 2025 |
| Light Tax Limited | Professional & scientific | 2022 |
| LIGHT18 Medicals PVT Limited | Health & social care | 2026 |
| Lighthouse HR Consultancy Ltd | Administrative & support | 2025 |
| Lighthouse UK Services Ltd | Health & social care | 2024 |
| Lightup Future CIC | Education | 2025 |
| Lignum Artis Ltd | Construction | 2024 |
| Liha Wesybury Limited | Hospitality | 2018 |
| LII Limited | Construction | 2017 |
| Like Ltd | Real estate | 2021 |
| Lilium Aviation UK Ltd | Other services | 2017 |
| Lilly Cafe Ltd | Hospitality | 2021 |
| Lillys Fairies Ltd | Administrative & support | 2017 |
| Lillystar Restaurant Limited | Hospitality | 2009 |
| Lilly’S Fairies Shine Ltd | Administrative & support | 2025 |
| Lily Lock's Chocs Ltd | Manufacturing | 2025 |
| Lily's PAD Film Services Ltd | Construction | 2016 |
| Lilyaus Limited | Health & social care | 2025 |
| Lilypads Properties Ltd | Information & communication | 2023 |
| Lilyvalley Care Ltd | Public administration | 2022 |
| Lilywood Residences Limited | Real estate | 2020 |
| LIM Group Ltd | Wholesale & retail | 2002 |
| Lima Kitchens Limited | Wholesale & retail | 2006 |
| Limar Care Services Limited | Health & social care | 2024 |
| Limar Childcare Solutions Limited | Health & social care | 2025 |
| Lime Cleaning Limited | Administrative & support | 2025 |
| Lime Court Properties Limited | Real estate | 2023 |
| Lime Electrical Limited | Construction | 2025 |
| Lime Heating Limited | Construction | 2022 |
| Lime Install Limited | Energy | 2025 |
| Lime Street Systems Solutions Limited | Financial services | 2009 |
| Limes Montessori Ltd | Education | 2018 |
| Limestone Design Limited | Professional & scientific | 2007 |
| Limited Layer Studio Ltd | Professional & scientific | 2026 |
| Limitless Accident Management Ltd | Wholesale & retail | 2016 |
| Limitless Activewear Ltd | Wholesale & retail | 2017 |
| Limitless Pharma Ltd | Professional & scientific | 2022 |
| Limora Bar and Grill Ltd | Hospitality | 2025 |
| Limpid Kranium Project Management Services Ltd | Professional & scientific | 2022 |
| LIN Huang Ltd. | Wholesale & retail | 2025 |
| Linacre Designs Limited | Professional & scientific | 2025 |
| Linaker Holdings Limited | Real estate | 2021 |
| Lincoln Green Law Limited | Professional & scientific | 2017 |
| Lincoln Green Solicitors Limited | Professional & scientific | 2018 |
| Lincoln TW Ltd | Real estate | 2018 |
| Linda Inks Limited | Manufacturing | 2023 |
| Lindal Security Ltd. | Wholesale & retail | 2003 |
| Lindler Court Management Limited | Households | 2001 |
| Lindsey Solutions Ltd | Other services | 2024 |
| Lindseyinchbald.Com Ltd | Other services | 2016 |
| Linear Building Innovations Limited | Manufacturing | 2014 |
| Linear Homes Limited | Real estate | 2009 |
| Linegate Properties Limited | Extraterritorial | 2017 |
| Lineinspector Ltd | Other services | 2024 |
| Liners Online Limited | Wholesale & retail | 2007 |
| Lines Building & Maintenance Limited | Construction | 2009 |
| Linesmc Logistics Group Ltd | Transport & logistics | 2025 |
| Linford Academy Ltd | Education | 2026 |
| Linford Cleaning Services Limited | Administrative & support | 2008 |
| Linford Corner Limited | Real estate | 2023 |
| Linford Digital Ltd | Information & communication | 2019 |
| Linford&Co. Ltd | Administrative & support | 2021 |
| Ling Tong Investments Ltd | Real estate | 2021 |
| Lingua Centra Ltd. | Education | 2014 |
| Linguini Ltd | Hospitality | 2022 |
| Link 2 Create Ltd | Education | 2006 |
| Link Management Solutions Ltd | Administrative & support | 2016 |
| Link One Limited | Manufacturing | 2022 |
| Link Stays Ltd | Households | 2025 |
| Link Supplies Ltd | Wholesale & retail | 2000 |
| Linked Business Connect and Events Company Limited | Arts & recreation | 2024 |
| Linkmk Ltd | Wholesale & retail | 2015 |
| Linko Ltd | Other services | 2019 |
| Linkqit Payments Technology Ltd | Financial services | 2023 |
| Linkserve Consultants Ltd | Professional & scientific | 2021 |
| Linkup IT Limited | Information & communication | 2013 |
| Linnell Land LLP | | 2010 |