| Lils Property Limited | Real estate | 2021 |
| Lily & Jack Optique Ltd | Professional & scientific | 2026 |
| Lily Care Northants Ltd | Health & social care | 2014 |
| Lily Consulting Limited | Professional & scientific | 2010 |
| Lily Vale Ltd | Other services | 2025 |
| Lilylocks & Co Ltd | Other services | 2024 |
| Limaru NV Limited | Other services | 2022 |
| Lime Bay Ltd | Administrative & support | 2019 |
| Lime Residential Property Management Ltd | Real estate | 2018 |
| Lime Security Ltd | Administrative & support | 2024 |
| Lime Tree IT Limited | Information & communication | 2016 |
| Limecast Ltd | Information & communication | 2019 |
| Limehurst Square Freehold Ltd | Real estate | 2023 |
| Limelight Hub Limited | Wholesale & retail | 2024 |
| Limoges Court, 08/03/1972 Limited | Extraterritorial | 2014 |
| Lina RAI UK Limited | Extraterritorial | 2023 |
| Lincoln CDA Limited | Health & social care | 2008 |
| Lincolnshire Childcare Limited | Education | 1996 |
| Lincolnshire Coastal Removals & Storage Ltd | Transport & logistics | 2012 |
| Linda F Knight Ltd | Financial services | 2011 |
| Linda Harvey FD Services Ltd | Professional & scientific | 2020 |
| Lindab Limited | Manufacturing | 1982 |
| Linden Mews (Kettering) Limited | Professional & scientific | 2003 |
| Lindustries Tech Ltd | Information & communication | 2021 |
| Line Resources Recruitment Ltd | Transport & logistics | 2021 |
| Lineham and Co Limited | Professional & scientific | 2015 |
| Linford Interiors Limited | Manufacturing | 2021 |
| Lingerie Lowdown Limited | Information & communication | 2017 |
| Lingua Tree Limited | Education | 2013 |
| Lingvistika UK Limited | Professional & scientific | 2017 |
| Lini Assets Limited | Information & communication | 2020 |
| Link Construction and Landscaping Limited | Construction | 2023 |
| Link Site Northampton Ltd | Transport & logistics | 2024 |
| Link Transport Limited | Transport & logistics | 2017 |
| Linkedbyme Ltd | Wholesale & retail | 2020 |
| Linkrides Limited | Transport & logistics | 2026 |
| Linkstone Capital Limited | Financial services | 2003 |
| Linktip Limited | Water & waste | 1979 |
| Linnell Monopoly Limited | Real estate | 2022 |
| Linslade Plumbing Limited | Wholesale & retail | 2018 |
| Linwell Nutrition Ltd | Manufacturing | 2022 |
| Lion Court RTM Company Ltd | Households | 2015 |
| Lion Floors Limited | Construction | 2018 |
| Lion Free Limited | Households | 2021 |
| Lion House Dentistry (Bridgwater) Limited | Health & social care | 2012 |
| Lion Intelectcars Ltd | Transport & logistics | 2017 |
| Lion Leader Limited | Transport & logistics | 2022 |
| Lion Lettings Ltd | Real estate | 2022 |
| Lion Mentality Ltd | Real estate | 2021 |
| Lion Mountain Limited | Real estate | 2022 |
| Lionheart AC Ltd | Construction | 2024 |
| Lionhearted Enterprises Limited | Wholesale & retail | 2021 |
| Lionmede Limited | Manufacturing | 1990 |
| Lionmede Wealth Management Ltd | Financial services | 2016 |
| Lionseal Ltd | Construction | 2022 |
| Lionshields Automotive Ltd | Other services | 2017 |
| Lionshields Customs Ltd | Other services | 2025 |
| Lior Global Services Ltd | Wholesale & retail | 2021 |
| Lipax Construction Limited | Construction | 2006 |
| Liqmeds Lifecare Limited | Professional & scientific | 2016 |
| Liqmeds Limited | Professional & scientific | 2016 |
| Liqmeds Worldwide Limited | Professional & scientific | 2016 |
| Liquid 33 Limited | Hospitality | 2017 |
| Liquid Design Limited | Administrative & support | 1997 |
| Liquid Life Ltd | Wholesale & retail | 2017 |
| Liquid Speak Ltd | Information & communication | 2009 |
| Lisa Deighan Limited | Professional & scientific | 2012 |
| Lisa Finch Limited | Professional & scientific | 2009 |
| Lisa O'Reilly Consultancy Limited | Education | 2014 |
| Lisaff Ltd | Hospitality | 2020 |
| Lishman Plumbing & Heating Contractors Ltd | Construction | 2016 |
| Lisieux Animals Limited | Agriculture & fishing | 2017 |
| Lisnic.Dev Limited | Information & communication | 2024 |
| Listars Academy Limited | Arts & recreation | 2012 |
| Listen Consulting Limited | Professional & scientific | 2021 |
| Litaliana Shenley Limited | Hospitality | 2019 |
| Litchborough Industrial Estate LLP | | 2006 |
| Litchfield Care Limited | Extraterritorial | 1990 |
| Lite One Production Services Limited | Arts & recreation | 2019 |
| Lite Studio Ltd | Professional & scientific | 2023 |
| Litefly Limited | Information & communication | 2016 |
| Lithusha PVT Ltd | Wholesale & retail | 2021 |
| Little Barn Owls Pre-School Ltd | Other services | 2016 |
| Little Bell Childminders Ltd | Health & social care | 2022 |
| Little Belsteads Care Home Limited | Health & social care | 2016 |
| Little Belsteads Holdings Limited | Professional & scientific | 2016 |
| Little Black Dog Beer Company Ltd | Manufacturing | 2016 |
| Little Bugs Childminding Ltd | Health & social care | 2023 |
| Little Church Street Apartments (Rugby) Ltd | Households | 2021 |
| Little Cloudy LC Limited | Manufacturing | 2023 |
| Little GEM Coffee and Cake House Ltd | Hospitality | 2025 |
| Little Grove Learning Limited | Education | 2026 |
| Little Harrowden 10 Renewables Limited | Professional & scientific | 2023 |
| Little Houghton Hospitality Limited | Real estate | 2010 |
| Little Kept Limited | Professional & scientific | 2024 |
| Little Knights Limited | Manufacturing | 2018 |
| Little Leeds Ltd. | Wholesale & retail | 2015 |
| Little Muse Creative Ltd | Professional & scientific | 2025 |
| Little Nightingale's Children's Day Nursery Limited | Health & social care | 2006 |
| Little Peach Moon Ltd | Professional & scientific | 2024 |