| Laviar Ltd | Construction | 2018 |
| Lavin Ltd | Wholesale & retail | 2021 |
| Lavina Gomes Limited | Other services | 2025 |
| Lavish Design & Build Ltd | Construction | 2024 |
| Lawmen Solicitors Limited | Professional & scientific | 2017 |
| LAY Property Management Ltd | Real estate | 2026 |
| Layne Co. Service Limited | Construction | 2026 |
| Lazex Enterprises Limited | Extraterritorial | 2014 |
| LCK Funeral Support Services Ltd | Other services | 2017 |
| LCR Autoworks Ltd | Wholesale & retail | 2021 |
| LDD Building Services Ltd | Construction | 2020 |
| LEA Health Ltd | Information & communication | 2026 |
| Leadership Tribe Ltd | Professional & scientific | 2017 |
| Leading Business Group Ltd | Manufacturing | 2021 |
| Learn Abroad Education Consultancy Ltd | Education | 2024 |
| Learn With FUN Childminder Ltd | Health & social care | 2018 |
| Learning Bright Limited | Education | 2025 |
| Learning Haven Hayes Limited | Education | 2026 |
| Learnova Group Limited | Education | 2026 |
| Leather Parts Apparel Ltd | Wholesale & retail | 2026 |
| Leatherwala Limited | Wholesale & retail | 2025 |
| Leayle Transport Ltd | Transport & logistics | 2016 |
| Lebidi. Ltd | Health & social care | 2019 |
| LED by Vision Limited | Wholesale & retail | 2012 |
| Ledger and Enterpise Ltd | Professional & scientific | 2025 |
| LEE Clements Piling Ltd | Administrative & support | 2018 |
| LEE Monk Consultancy Ltd | Professional & scientific | 2026 |
| Legacy Construction & Roofing Ltd | Construction | 2025 |
| Legal Professional Development Limited | Administrative & support | 2002 |
| Legend 87 Ltd | Wholesale & retail | 2021 |
| Leila Home London Ltd | Wholesale & retail | 2020 |
| Lelylance Electricals Limited | Construction | 2017 |
| LEN Wizzle Limited | Wholesale & retail | 2018 |
| Leno Construction Ltd | Construction | 2019 |
| Lenora Construction Ltd | Construction | 2020 |
| LEO Flooring Limited | Construction | 2024 |
| Leominster Business Park Ltd | Real estate | 2024 |
| Lepare Ltd | Wholesale & retail | 2019 |
| Lerida Recruitment Ltd | Information & communication | 2024 |
| Let's EAT & Greet Ltd | Hospitality | 2023 |
| Levassi Ltd | Wholesale & retail | 2023 |
| Level Plus Builder Ltd | Construction | 2023 |
| Level UP Builders Ltd | Construction | 2019 |
| Level UP Construction London Ltd | Hospitality | 2025 |
| Levyne Daniel Research and Development Ltd | Professional & scientific | 2020 |
| LEWI10 Ltd | Health & social care | 2023 |
| Lewis Logan Ltd | Construction | 2018 |
| LEX 21 Ltd | Professional & scientific | 2024 |
| LEX Readers LLP | | 2024 |
| Lexen Law Ltd | Professional & scientific | 2022 |
| LFA Academy Ltd | Education | 2022 |
| LHM Traders Ltd | Administrative & support | 2024 |
| LHR Cars Limited | Transport & logistics | 2013 |
| LHR Ride Ltd | Transport & logistics | 2024 |
| Libanex Limited | Real estate | 1992 |
| Liberty MAY Limited | Financial services | 2017 |
| Libertyelektra Ltd | Health & social care | 2018 |
| Licencing & Qualifications Limited | Administrative & support | 2016 |
| Lider Construct Ltd | Construction | 2024 |
| Life Construction (London) Limited | Construction | 2009 |
| Life IS Health Limited | Manufacturing | 2025 |
| Lifeline AID for Humanity CIC | Information & communication | 2024 |
| Lifelog Limited | Information & communication | 2025 |
| Lifted Group Limited | Water & waste | 2022 |
| Liftwise Car Hire Ltd | Administrative & support | 2023 |
| Light 32 Ltd | Manufacturing | 2021 |
| Lighthouse Research & Development Ltd | Administrative & support | 2022 |
| Lightnshade Couples & Family Therapy Ltd | Other services | 2020 |
| Lightsafe Limited | Construction | 2020 |
| Lightwood Builds Ltd | Construction | 2019 |
| Liie Mayfair Ltd | Administrative & support | 2023 |
| Likang Limited | Health & social care | 2020 |
| Lily & Rock Ltd | Wholesale & retail | 2020 |
| Lily Anne Webster Limited | Extraterritorial | 2024 |
| LIM Education Ltd | Public administration | 2020 |
| Limelight Investments Ltd | Real estate | 2021 |
| Limitless Prizes Ltd | Other services | 2020 |
| Limitlus Ltd | Wholesale & retail | 2017 |
| Limra Foods Ltd. | Hospitality | 2017 |
| Limu Goods Limited | Wholesale & retail | 2024 |
| Line Haven Limited | Wholesale & retail | 2026 |
| Link 4 London Ltd | Construction | 2024 |
| Link Consultancy Services Limited | Administrative & support | 2025 |
| Link Courtesy Cars Ltd | Administrative & support | 2022 |
| Link Data Solutions Ltd | Information & communication | 2018 |
| Link Properties (UK) Limited | Real estate | 2004 |
| Link-Up Intl. Limited | Wholesale & retail | 2011 |
| Linked Business UK Ltd | Professional & scientific | 2021 |
| Lions City Football Club Limited | Arts & recreation | 2023 |
| Liquor Masters Ltd | Wholesale & retail | 2024 |
| Lishkaarevirsa Ltd | Arts & recreation | 2025 |
| Lithiksha Limited | Wholesale & retail | 2025 |
| Little Angel Global Ltd | Wholesale & retail | 2025 |
| Little Charm Uniforms Limited | Wholesale & retail | 2025 |
| Little Hill Ltd | Construction | 2021 |
| Little Locum Ltd | Health & social care | 2023 |
| Little Marvels Nursery Services Limited | Education | 2015 |
| Little Shiraz Ltd | Hospitality | 2020 |
| Little Tigers Sports Ltd | Arts & recreation | 2024 |
| Liv-Elite Ltd | Wholesale & retail | 2024 |