| Lancashire Family Support Ltd | Health & social care | 2026 |
| Lancashire Spitfires Girls Club Limited | Arts & recreation | 2020 |
| Land Freedom Partners Ltd | Real estate | 2025 |
| Land MX Ltd | Wholesale & retail | 2025 |
| Land to Living Planning Specialists Ltd | Real estate | 2026 |
| Landfall Marine Ltd | Wholesale & retail | 2026 |
| Landlord and Property Solutions Ltd | Real estate | 2017 |
| Landmark Axis Limited | Administrative & support | 2025 |
| Laneet Ltd | Arts & recreation | 2025 |
| Langdon Mueller Ltd | Information & communication | 2026 |
| Langley Property Management (Midlands) Ltd | Real estate | 2023 |
| Langley-Brown Property Holdings Limited | Real estate | 2023 |
| Langlois Family Law Limited | Professional & scientific | 2022 |
| Langney Road Management Company Limited | Households | 2023 |
| Langport Boating CIC | Transport & logistics | 2025 |
| Languo Ltd | Wholesale & retail | 2025 |
| Laniakea Continuum Ltd | Information & communication | 2016 |
| Lanin Home Ltd | Wholesale & retail | 2024 |
| Lanko Trading Co., Ltd | Manufacturing | 2021 |
| Lanshore Trade Ltd | Wholesale & retail | 2025 |
| Lanternintelligencesolutions Ltd | Information & communication | 2025 |
| Lanwall Internetnational Trade Co., Ltd | Wholesale & retail | 2025 |
| Lanying Trade Ltd | Wholesale & retail | 2024 |
| Laosilaisizf Co., Ltd | Wholesale & retail | 2025 |
| Laoyao Ltd | Wholesale & retail | 2025 |
| Lapp Land Limited | Construction | 2025 |
| Lapwing & Oban Advisory Ltd | Professional & scientific | 2026 |
| Larena Trading Ltd | Wholesale & retail | 2019 |
| Larj Property Solutions Ltd | Real estate | 2026 |
| Laser Store Ltd | Wholesale & retail | 2025 |
| Last Day on Earth Limited | Information & communication | 2024 |
| Last Page Group Ltd | Wholesale & retail | 2024 |
| Laterna Zagnus Ltd | Wholesale & retail | 2025 |
| Latin Cafe Ltd | Hospitality | 2021 |
| Lattice Moon Ltd | Information & communication | 2025 |
| LAU Films Limited | Information & communication | 2026 |
| Launchentra Campaign Office Ltd | Information & communication | 2026 |
| Launchmate Labs Ltd | Information & communication | 2025 |
| Laundry Clan Ltd | Other services | 2026 |
| Laundry Wash Ltd | Other services | 2025 |
| Lauravigo Ltd | Manufacturing | 2023 |
| Lavenco Trade Ltd | Wholesale & retail | 2025 |
| Lavinia Solution Limited | Administrative & support | 2026 |
| Lavkor Company Ltd | Wholesale & retail | 2026 |
| Lavmay Ltd | Extraterritorial | 2024 |
| Law Link (ATE) Limited | Financial services | 2003 |
| Lawn Supreme Ltd | Administrative & support | 2021 |
| Lawtutor.Io Ltd | Education | 2021 |
| Laxander Limited | Wholesale & retail | 2024 |
| Layerhaus Ltd | Real estate | 2025 |
| Layr LDN Ltd | Professional & scientific | 2025 |
| Layxhsdress Ltd | Wholesale & retail | 2025 |
| Lbarker Construction Ltd | Construction | 2024 |
| Lccoo Ltd | Extraterritorial | 2024 |
| Lccycy Ltd | Manufacturing | 2026 |
| LCL Media Ltd | Wholesale & retail | 2025 |
| LCL Windows & Doors Ltd | Construction | 2020 |
| LDC Recruitment Ltd | Administrative & support | 2026 |
| LE Food Link Ltd | Information & communication | 2024 |
| LE Manoir DE Founcroup Limited | Real estate | 1998 |
| LEA Made Ltd | Manufacturing | 2021 |
| Lead Valve (UK) Ltd | Administrative & support | 2011 |
| Leader Proto Co., Ltd | Administrative & support | 2024 |
| Leading Homes Limited | Real estate | 2019 |
| Leadquality Ltd | Professional & scientific | 2023 |
| Leaf and Key Properties Limited | Real estate | 2026 |
| Leanne Margaret Ltd | Wholesale & retail | 2025 |
| Learn Price Analysis Ltd | Information & communication | 2025 |
| Lease Cars Ltd | Administrative & support | 2018 |
| Leathees Ltd | Wholesale & retail | 2022 |
| Leather Accessories Co., Ltd | Administrative & support | 2023 |
| LEATHER4YOU Ltd | Wholesale & retail | 2021 |
| Leave Curious Ltd | Information & communication | 2026 |
| Lecatech Ltd | Wholesale & retail | 2025 |
| Lecy Global Ltd | Wholesale & retail | 2025 |
| Ledgershift Accountancy Ltd | Professional & scientific | 2025 |
| Lee-Breedon Properties Ltd | Real estate | 2025 |
| Leeds Lite Co., Limited | Wholesale & retail | 2024 |
| Leeds Queer Film Festival CIC | Arts & recreation | 2025 |
| Legaci Homes Ltd | Real estate | 2025 |
| Legacy Business Solutions Ltd | Information & communication | 2025 |
| Legally Associated Ltd | Administrative & support | 2020 |
| Legato Worldwide Limited | Wholesale & retail | 2025 |
| Legba Ltd | Information & communication | 2026 |
| Legend Culture Media Ltd | Professional & scientific | 2025 |
| LEGEND84 Ltd | Information & communication | 2025 |
| Legendary Whale Media Ltd | Arts & recreation | 2025 |
| LEI MA Limited | Wholesale & retail | 2023 |
| Leicestershire Ambulance Service Ltd | Health & social care | 2018 |
| Leinuozf Co., Ltd | Wholesale & retail | 2025 |
| Leipusen-Tools Ltd | Wholesale & retail | 2025 |
| Leisure Team UK Ltd | Administrative & support | 2025 |
| Lejean Travels Ltd | Wholesale & retail | 2026 |
| Lele Cultural Media Ltd | Information & communication | 2025 |
| Lemaiyan Labs Ltd | Information & communication | 2025 |
| Lemon Balm Education Ltd | Information & communication | 2026 |
| Lemon Brick Road Ltd | Professional & scientific | 2022 |
| Lemon COG Ltd | Information & communication | 2018 |
| Lemontina Ltd | Other services | 2025 |
| Lemora Ltd | Wholesale & retail | 2025 |