| Leyland TM Ltd | Construction | 2023 |
| Leylas Grill House Limited | Hospitality | 2026 |
| LFT Transport Ltd | Transport & logistics | 2012 |
| LG Dunscroft Limited | Hospitality | 2020 |
| LG Environmental Services Ltd | Water & waste | 2025 |
| LG Fencing & Garden Maintenance Ltd | Administrative & support | 2021 |
| LG Spares Ltd | Wholesale & retail | 2025 |
| Lgcs (Southern) Limited | Construction | 2007 |
| LGE Plant Limited | Construction | 2017 |
| LGK Farms LLP | | 2011 |
| LGL Electrical Limited | Wholesale & retail | 2006 |
| LGX Solutions Ltd | Professional & scientific | 2023 |
| LHD Partners Ltd | Education | 2004 |
| Lhetherington Ltd | Real estate | 2021 |
| Lhmh Property Ltd | Real estate | 2024 |
| LHT Limited | Administrative & support | 2009 |
| Liakada Corfu Ltd | Other services | 2015 |
| Liam Flynn TM Ltd | Public administration | 2025 |
| Liam Gelder 1 Ltd | Transport & logistics | 2021 |
| Liam Haigh Signalling Ltd | Construction | 2025 |
| Liam Wallace TM Ltd | Public administration | 2025 |
| Liam’S Disco & Karaoke Ltd | Arts & recreation | 2021 |
| Liana Group Limited | Construction | 2018 |
| Liany Limited | Transport & logistics | 2017 |
| Libera Beauty Clinic Ltd | Other services | 2022 |
| Libertas Homes Lettings Limited | Real estate | 2024 |
| Liberty Capital Asset Management GB Ltd | Financial services | 2023 |
| Liberty Group Holdings Ltd | Financial services | 1996 |
| Liberty Guard (U.K.) Limited | Construction | 2002 |
| Liberty Libations Langley Limited | Hospitality | 2024 |
| Liberty Libations Limited | Hospitality | 2020 |
| Libig Ltd | Transport & logistics | 2025 |
| Libra Logistica Ltd | Wholesale & retail | 2025 |
| Libra Logistics Limited | Transport & logistics | 2022 |
| Libra Support Ltd | Administrative & support | 2024 |
| Librix Ltd | Financial services | 2025 |
| Life Mobility of Thorne Ltd | Wholesale & retail | 2012 |
| Lifeknife Ltd | Extraterritorial | 2025 |
| Lifelike Gaming Ltd | Wholesale & retail | 2024 |
| Lifespan Community Care CIC | Health & social care | 2026 |
| Lifestyle Foods Limited | Professional & scientific | 1987 |
| Lifestyle Hotels Limited | Hospitality | 2007 |
| Lifetask Limited | Administrative & support | 2022 |
| Lifeways Healthcare Limited | Administrative & support | 2021 |
| Lift and Thrive Ltd | Arts & recreation | 2026 |
| Liftex Engineering & Technical Services Limited | Manufacturing | 2007 |
| Lifting Support Services Limited | Administrative & support | 2010 |
| Light & Shade Soft Furnishings Ltd | Manufacturing | 2023 |
| Light Haulage Courier Limited | Transport & logistics | 2019 |
| Light Plus Lighting Limited | Manufacturing | 2025 |
| Light Plus UK Limited | Manufacturing | 2025 |
| Light Sauce Limited | Wholesale & retail | 2011 |
| Lightburn Electrical Ltd | Construction | 2022 |
| Lighthouse Connect Limited | Financial services | 2018 |
| Lighthouse Creative C.I.C. | Arts & recreation | 2024 |
| Lighthouse Works Ltd | Wholesale & retail | 2026 |
| Lightling Limited | Information & communication | 2022 |
| Lightning Archive Ltd | Information & communication | 2020 |
| Lights in the Sky Ltd | Information & communication | 2018 |
| Ligita Limited | Health & social care | 2016 |
| Lillie-Rose Home Care Limited | Administrative & support | 2021 |
| Lily Hall Limited | Construction | 2016 |
| LIM Transport Ltd | Transport & logistics | 2023 |
| Lime PAY Admin Ltd | Administrative & support | 2025 |
| Lime PAY Services Ltd | Administrative & support | 2025 |
| Lime PAY Solutions Ltd | Construction | 2025 |
| Limelite (North Lincolnshire) Limited | Other services | 2009 |
| Limemarkets Group Limited | Hospitality | 2023 |
| Limited Edition Tattoo Studios Limited | Administrative & support | 2009 |
| Limitless Commercial Ltd | Wholesale & retail | 2021 |
| Limitless Digital Limited | Information & communication | 2016 |
| Limitless Tanlines Ltd | Other services | 2025 |
| Limitless.Trading Ltd | Wholesale & retail | 2025 |
| Linchips Limited | Manufacturing | 2003 |
| Lincoln Lens Ltd | Professional & scientific | 2024 |
| Lincolnshire Independent Financial Advisers Limited | Financial services | 2007 |
| Lincolnshire Property Group Ltd | Construction | 2026 |
| Lincs Wheels Ltd | Administrative & support | 2025 |
| Lincwaste Limited | Water & waste | 1991 |
| Lindale Business Consulting Ltd | Information & communication | 2018 |
| Lindholme Convenience & Cafe Ltd | Wholesale & retail | 2025 |
| Lindholme Lakes Country Park Ltd | Hospitality | 2012 |
| Lindholme Residents Management Company Limited | Households | 1991 |
| Lindholme Retreat Ltd | Hospitality | 2024 |
| Lindrick Management Services Limited | Professional & scientific | 2003 |
| Lindsay Barber & Co Limited | Construction | 2003 |
| Lindsay Mcglone Ltd | Administrative & support | 2024 |
| Line Tech Development Ltd | Information & communication | 2022 |
| Lingfield Court Management Limited | Households | 1980 |
| Link 75 Consulting Ltd | Professional & scientific | 2025 |
| Link-Agent Limited | Wholesale & retail | 1985 |
| Linkisuk Ltd | Wholesale & retail | 2024 |
| Links Plastic and Recycling Solutions Ltd | Water & waste | 2019 |
| Linley Lettings Limited | Real estate | 2025 |
| Linley Property Holdings Ltd | Real estate | 2023 |
| Linroyale Potatoes Ltd | Agriculture & fishing | 2015 |
| Lion Trading (GB) Limited | Wholesale & retail | 2008 |
| Lionheart Property Partnership Limited | Real estate | 2018 |
| LIONROAD79 Ltd | Transport & logistics | 2024 |
| Liora Wellness Ltd | Health & social care | 2026 |