| Latham Trading Limited | Administrative & support | 2000 |
| Lauderdale Solutions Ltd | Professional & scientific | 2023 |
| Launch Lettings Ltd | Real estate | 2024 |
| Laura & Andrei Trans Ltd | Transport & logistics | 2025 |
| Laura Beaumont Nail Artist Ltd | Other services | 2021 |
| Laura SS Harvey Ltd | Administrative & support | 2021 |
| Lauren Shaffstall Ltd | Manufacturing | 2024 |
| Lautim Ltd | Real estate | 2024 |
| Lavender Medic UK Ltd | Health & social care | 2018 |
| Lavender Moon Ltd | Wholesale & retail | 2022 |
| Lavender Stockbroking Ltd | Financial services | 2014 |
| Lavenland Limited | Administrative & support | 1989 |
| Lavi Services Ltd | Manufacturing | 2023 |
| Lavinine Ltd | Manufacturing | 2021 |
| Lavish Life Ltd | Hospitality | 2012 |
| LAVISH4ME Ltd | Manufacturing | 2019 |
| Law Developments Limited | Construction | 2003 |
| Law's (HK) Limited | Wholesale & retail | 2015 |
| LAW74 Ltd. | Wholesale & retail | 2013 |
| Lawra Consulting Ltd | Professional & scientific | 2013 |
| Lawrence Leisure Limited | Real estate | 1977 |
| Lawrence Paige Limited | Wholesale & retail | 2024 |
| Lawro Engineering Ltd | Professional & scientific | 2026 |
| Laxdigital Ltd | Wholesale & retail | 2025 |
| Laxmi LOX Limited | Real estate | 2003 |
| Layad Ltd | Wholesale & retail | 2026 |
| Layla Gordon Consulting Ltd | Administrative & support | 2025 |
| Layla Gordon Nutrition Ltd | Health & social care | 2021 |
| LAZ16 Limited | Wholesale & retail | 2016 |
| Lazar Trans Services Limited | Transport & logistics | 2017 |
| Lazy Days Skippered Boat Charters Ltd | Transport & logistics | 2020 |
| Lazy Gardening Ltd | Wholesale & retail | 2022 |
| LB Cleaning Contractors Ltd | Administrative & support | 2025 |
| LB Dorset Ltd | Other services | 2024 |
| LB23 Limited | Information & communication | 2026 |
| LBC Life Style Limited | Households | 2025 |
| Lbcb Properties Limited | Construction | 2020 |
| LC Software Limited | Information & communication | 2023 |
| LCA Interiors Ltd | Construction | 2024 |
| LCN Works Ltd | Wholesale & retail | 2024 |
| LD Holdings Limited | Financial services | 2021 |
| LD Land and Property Ltd | Real estate | 2022 |
| LDF PUB Company Limited | Hospitality | 2019 |
| LDI Holdings Ltd | Financial services | 2018 |
| LDK Cargo Couriers Limited | Transport & logistics | 2024 |
| LDL Productions Limited | Information & communication | 2022 |
| Ldss Consulting Limited | Professional & scientific | 2025 |
| LE Boutillier Estates Limited | Real estate | 1996 |
| LE Chateau Limited | Hospitality | 2001 |
| LE Mesurier Studio Ltd | Professional & scientific | 2023 |
| Le.Nari. Ltd | Wholesale & retail | 2025 |
| LEA House Ltd | Health & social care | 2017 |
| Lead Aware UK Ltd | Professional & scientific | 2024 |
| Lead GEM Ltd | Professional & scientific | 2025 |
| Lead Partners Limited | Information & communication | 2017 |
| Leader-Fox Ltd | Real estate | 2016 |
| Leader-Woolfenden Limited | Real estate | 2012 |
| Leading Edways Ltd | Information & communication | 2024 |
| Leadlift Limited | Professional & scientific | 2024 |
| Leadnestai Ltd | Construction | 2025 |
| Leadtree Global Limited | Financial services | 2013 |
| Leaf Enterprises Limited | Education | 2018 |
| Leaf Petals Ltd | Wholesale & retail | 2022 |
| Leaning Tower Property Solutions Ltd | Real estate | 2019 |
| Learning Pioneers Ltd | Education | 2024 |
| Leasechange Residents Management Limited | Professional & scientific | 1988 |
| Leatherbound Fantasy Ltd | Wholesale & retail | 2026 |
| Leauxla Lashes Ltd | Wholesale & retail | 2018 |
| Ledball Properties Limited | Real estate | 2025 |
| Ledhouse Limited | Administrative & support | 2018 |
| LEE Property Services and Developments Ltd | Construction | 2025 |
| LEE YAU Enterprise Ltd | Wholesale & retail | 2023 |
| Leeway Strategy Limited | Professional & scientific | 2022 |
| Left of Centre Ltd | Real estate | 2008 |
| Legacy Academy of Dance and Performing Arts Limited | Arts & recreation | 2018 |
| Legacy Prints Ltd | Information & communication | 2025 |
| Legacy Strategics Ltd | Construction | 2021 |
| Legacy Supported Housing CIC | Health & social care | 2025 |
| Legal Cloud Ltd | Professional & scientific | 2014 |
| Legal Compliance Support Limited | Professional & scientific | 2023 |
| Leigh Davies Windows Limited | Construction | 2015 |
| Leisure First Limited | Wholesale & retail | 2020 |
| Leisure Homes Direct Limited | Wholesale & retail | 2009 |
| Leisuredeck Limited | Information & communication | 2023 |
| LEK Systems Ltd | Information & communication | 2026 |
| LEM Media Ltd | Arts & recreation | 2022 |
| Lemega Design Ltd | Professional & scientific | 2024 |
| Lemongrass Foods Limited | Hospitality | 2013 |
| Lemur Attractions Limited | Arts & recreation | 2021 |
| Lemur Leisure Limited | Arts & recreation | 1992 |
| Lemur Limited | Professional & scientific | 2002 |
| Lemur Waterparks Limited | Arts & recreation | 2009 |
| Lenara Training Ltd | Education | 2023 |
| Lenbeau Limited | Professional & scientific | 2025 |
| Lendbulb Limited | Professional & scientific | 2020 |
| Lennarts Ltd | Information & communication | 2016 |
| Lensomi Ltd | Professional & scientific | 2026 |
| LEO Creative Limited | Arts & recreation | 2013 |
| LEO Engineering Consulting Ltd | Manufacturing | 2023 |
| LEO HCW Ltd | Administrative & support | 2024 |