| LE Trapp Ltd | Hospitality | 2025 |
| Leadership Visibility Co Ltd | Professional & scientific | 2025 |
| Leadsy Limited | Professional & scientific | 2020 |
| Leah Morgan Properties Ltd | Extraterritorial | 2021 |
| Lean Vision Limited | Professional & scientific | 2017 |
| Leanwork Consultants Ltd | Professional & scientific | 2024 |
| Learn 2 Resell Ltd | Wholesale & retail | 2024 |
| Learn Technology Ltd | Education | 2021 |
| Learning Community Trust | Education | 2017 |
| Learning Link Online | Education | 2025 |
| Lease Options Made Simple Limited | Professional & scientific | 2010 |
| Ledbrook Developments Ltd | Construction | 2024 |
| Ledders Sauce Company Ltd | Manufacturing | 2025 |
| LEE MAC Limited | Hospitality | 2025 |
| LEE Matthews British Military Martial Arts Limited | Arts & recreation | 2006 |
| LEE Street Limited | Real estate | 2014 |
| Leebeez Transport Services Ltd | Transport & logistics | 2022 |
| Leegate Care Limited | Health & social care | 1999 |
| Leegate Holdings Limited | Professional & scientific | 2023 |
| Leegomery Computers Limited | Extraterritorial | 2015 |
| Leeways Construction Ltd | Construction | 2010 |
| Legacy Africa Ltd | Construction | 2019 |
| Legacy Court Limited | Construction | 2016 |
| Legacy Equine Ltd | Wholesale & retail | 2025 |
| Legacy Spark Ltd | Administrative & support | 2025 |
| Legalbase TFL Limited | Professional & scientific | 2021 |
| Legrande Cleaning Services Ltd | Administrative & support | 2026 |
| Leigh Accountancy Limited | Professional & scientific | 2014 |
| Leigh Property Management Ltd | Real estate | 2025 |
| Leiknir Ltd | Other services | 2019 |
| Leisure and Outdoor Furniture Association Limited | Other services | 1986 |
| Leiyo Ltd | Other services | 2020 |
| Lekwajo Ltd | Health & social care | 2025 |
| Lemaire Care Limited | Health & social care | 2022 |
| Lemeno Ltd | Information & communication | 2017 |
| Lemp Services Ltd | Agriculture & fishing | 2021 |
| Lengreo Ltd | Other services | 2019 |
| Lenli Ltd | Manufacturing | 2019 |
| Leoboy Servers Limited | Information & communication | 2021 |
| Leoglo Ltd | Health & social care | 2019 |
| Leonard Court (Oakengates) Residents Management Company Limited | Households | 2004 |
| Leoniw Ltd | Other services | 2019 |
| Lephoria Limited | Wholesale & retail | 2020 |
| Leptikut Ltd | Wholesale & retail | 2019 |
| LES the Wellington Cobbler Ltd | Other services | 2017 |
| Lettershanner Sole Trader Limited | Health & social care | 2011 |
| Lettingson Ltd | Real estate | 2021 |
| LEV Direct Limited | Wholesale & retail | 1995 |
| Levantus Ltd | Wholesale & retail | 2019 |
| Level UP Partyware Ltd | Wholesale & retail | 2020 |
| Level UP Self Build Support Ltd | Construction | 2026 |
| Levella Engineering Ltd | Manufacturing | 2020 |
| Levels Property Management Ltd | Real estate | 2025 |
| Lewes Builders Limited | Construction | 2009 |
| Lewis Architecture Limited | Professional & scientific | 2005 |
| Lewis Catering Limited | Hospitality | 2014 |
| Lewis Howdle Limited | Construction | 1999 |
| Lewis Russell Ltd | Administrative & support | 2015 |
| Lexrae Holdings Ltd | Financial services | 2021 |
| Lexrae Support Ltd | Public administration | 2020 |
| Leyefe Limited | Wholesale & retail | 2023 |
| LF Housing&Accommodation Ltd | Hospitality | 2023 |
| LFT Services Ltd | Construction | 2016 |
| LG 101 Limited | Hospitality | 2025 |
| LH Medical Ltd | Health & social care | 2016 |
| LIB Property Investors Ltd | Real estate | 2018 |
| Liberec Ltd | Other services | 2020 |
| Liberty & Redemption Bushcraft CIC | Education | 2024 |
| Liberty Glazing Ltd | Construction | 2026 |
| Libra Systems Limited | Manufacturing | 2003 |
| Licence Bureau Limited | Extraterritorial | 2008 |
| Licensed Kennel and Cattery Association | Other services | 2014 |
| Life Design Group Limited | Information & communication | 2016 |
| Life Frontiers Limited | Health & social care | 2023 |
| Life Growth Limited | Information & communication | 2020 |
| Lifting Machinery Consultants & Surveyors Limited | Professional & scientific | 2013 |
| Lightbox Management Company Ltd | Households | 2021 |
| Lighthouse Data Services Ltd | Information & communication | 2019 |
| Lightmoor New Community Limited(The) | Other services | 1985 |
| Lightmoor Property Ltd | Real estate | 2025 |
| Lightspeedscd Ltd | Manufacturing | 2021 |
| Lightweight Mobility Scooters Ltd | Wholesale & retail | 2020 |
| Ligia Poara Limited | Information & communication | 2025 |
| Lignum 22 Limited | Manufacturing | 2015 |
| Lilla Ltd | Transport & logistics | 2021 |
| Lillie Rose Mgmt Ltd | Manufacturing | 2020 |
| Lily & Loaf International Ltd | Wholesale & retail | 2013 |
| Lilyhurst Industrial Estate Limited | Real estate | 2024 |
| Lilyhurst Property Ltd | Real estate | 2024 |
| Lime Green Associates Limited | Professional & scientific | 2018 |
| Limehill Homes Limited | Construction | 2017 |
| Limetree Landscape Services and Nurseries Limited | Administrative & support | 2009 |
| Limevibe Limited | Information & communication | 2009 |
| Limited Edition Apparel Ltd | Wholesale & retail | 2023 |
| Limitless Life Publishing Limited | Other services | 2019 |
| Limogest Ltd | Other services | 2019 |
| Lindos Locks Ltd | Manufacturing | 2026 |
| Line Dance Central CIC | Arts & recreation | 2025 |
| Linense Ltd | Other services | 2022 |
| Link 7 Consulting Ltd | Professional & scientific | 2016 |