| Liiife Wellness Ltd | Hospitality | 2024 |
| Like Digital Media Ltd | Administrative & support | 2011 |
| LIL Cottage Limited | Real estate | 2025 |
| LIL1 Lightrock Limited | Energy | 2026 |
| Lilac Medical Ltd | Health & social care | 2020 |
| Lilarama Limited | Manufacturing | 2017 |
| Lili's ARK Limited | Information & communication | 2024 |
| Lilleson Limited | Manufacturing | 2018 |
| Lilly & Jones Ltd | Wholesale & retail | 2019 |
| Lilly BOW Ltd | Health & social care | 2024 |
| Lilly Elbra PR Limited | Administrative & support | 2002 |
| Lily Lodge Equestrian Centre Ltd. | Arts & recreation | 2016 |
| Lily PA Management Limited | Professional & scientific | 2014 |
| Lily Rose Hospitality Ltd | Hospitality | 2025 |
| Lilygood Ltd | Wholesale & retail | 2021 |
| Lily’S Boutique Retail Ltd | Wholesale & retail | 2020 |
| Limar Childcare Limited | Health & social care | 2011 |
| Lime 62 Interiors Ltd | Construction | 2005 |
| Lime Aviation Ltd | Other services | 2024 |
| Limehub HR Ltd | Professional & scientific | 2024 |
| Limelight Laser & Cutting Services Limited | Manufacturing | 1998 |
| Limelight Presentation Systems Limited | Administrative & support | 2009 |
| Limeplus Limited | Real estate | 2024 |
| Limes 2018 Limited | Households | 2018 |
| Limes Management (Rotherham) Limited | Households | 2005 |
| Limewood Estates Limited | Real estate | 1992 |
| LIMITED2ART Ltd | Wholesale & retail | 2002 |
| Limitedly Limited | Extraterritorial | 2025 |
| Limitless Cruises Ltd | Administrative & support | 2025 |
| Limitless Futures Group Ltd | Administrative & support | 2024 |
| Limitless Homes and Support Ltd | Hospitality | 2019 |
| Limitless Pages Limited | Information & communication | 2025 |
| Limitless Potential Coaching & Mentoring CIC | Public administration | 2026 |
| Limitstate Limited | Information & communication | 2006 |
| LIMONA24 Limited | Health & social care | 2021 |
| Limra Services Ltd | Wholesale & retail | 2021 |
| LIN QI Jiong Ltd | Wholesale & retail | 2025 |
| Lina Catering Ltd | Wholesale & retail | 2026 |
| Linafair Services Limited | Hospitality | 2025 |
| Linbridge Investments Limited | Real estate | 2006 |
| Linbrooke Design Services Limited | Professional & scientific | 2014 |
| Linburg Touring (Sales) Ltd | Transport & logistics | 2004 |
| Linburg Touring Limited | Transport & logistics | 2002 |
| Lincoln Comms Ltd | Manufacturing | 2016 |
| Lincoln Electric (U.K.) Limited | Manufacturing | 1986 |
| Lincoln Finance Ltd | Financial services | 2005 |
| Lincolnshire Trailers Limited | Administrative & support | 2020 |
| Linda LEE Limited | Administrative & support | 2012 |
| Linden House (Sheffield) Limited | Households | 2008 |
| Linden LEA Developments Limited | Construction | 2019 |
| Linden LEA Living Ltd | Real estate | 2025 |
| Lindholme Motor Sports Club Limited | Arts & recreation | 1994 |
| Lindley Leasing Limited | Administrative & support | 2021 |
| Lindley Property Management Limited | Real estate | 2021 |
| Lindrick Accountancy Services Ltd | Professional & scientific | 2008 |
| Lindrick Aggregates Limited | Mining & quarrying | 2019 |
| Lindrick Park Development Limited | Construction | 2015 |
| Lindsey Hall Coaches Limited | Other services | 2023 |
| Lindsey Harrad Ltd | Administrative & support | 2012 |
| Lindum Medical Ltd | Information & communication | 2016 |
| Linear Employee Ownership Trust Limited | Financial services | 2022 |
| Linear Property Developments Limited | Construction | 2002 |
| Linear Recruitment Limited | Administrative & support | 2001 |
| Linernotes Limited | Information & communication | 2011 |
| Ling Jing Limited | Real estate | 2012 |
| Linghai Supply Chain Limited | Wholesale & retail | 2025 |
| Lingmoor JJI Ltd | Health & social care | 2015 |
| Lingolearners Ltd | Education | 2014 |
| Link Industry Limited | Wholesale & retail | 2006 |
| Link Learning Communities CIC | Education | 2023 |
| Link Learning Ltd | Education | 2018 |
| Link ME UP Ltd | Hospitality | 2024 |
| LINK2 Limited | Information & communication | 2012 |
| Links Sports Trust | Arts & recreation | 2004 |
| Links Together CIC | Health & social care | 2026 |
| Linmar Pipework Ltd | Manufacturing | 2017 |
| Linmar Pipework Systems Ltd | Manufacturing | 2023 |
| Lins Trading & Services Ltd | Administrative & support | 2026 |
| Linton Commercials Ltd | Wholesale & retail | 2025 |
| Linus Technology Ltd | Information & communication | 2022 |
| Linx Beds Limited | Wholesale & retail | 2008 |
| Linx Transport Ltd | Transport & logistics | 2024 |
| LIO AI Ltd | Information & communication | 2023 |
| Lion Design Ltd | Administrative & support | 2009 |
| Lion Homes Developments Ltd | Construction | 2020 |
| Lion Scaffold Alarms Limited | Manufacturing | 2013 |
| Lion Works ( UK ) Limited | Real estate | 2016 |
| Lionhart Tax Ltd | Professional & scientific | 2023 |
| Lions and Bears Ltd | Information & communication | 2013 |
| Lionsgate Cleaning Ltd | Administrative & support | 2025 |
| Liopleurodon Capital Limited | Financial services | 2010 |
| Liora Clothing Ltd | Wholesale & retail | 2025 |
| Lipa Health Limited | Health & social care | 2021 |
| Lipo LAB Chesterfield Ltd | Other services | 2026 |
| Lipo LAB Ltd | Other services | 2021 |
| Lipocube BIO Technology Limited | Wholesale & retail | 2017 |
| Lipstick Group Ltd | Information & communication | 2019 |
| Liquid Assets (Investments) Limited | Professional & scientific | 2022 |
| Liquid Dance Academy CIC | Education | 2024 |
| Liquid Image Limited | Professional & scientific | 2000 |