| Lifestyle Training Ltd | Other services | 2012 |
| LIFESTYLE4FITNESS Ltd | Education | 2025 |
| Lifetime School of Motoring Ltd | Education | 2023 |
| Light Dreams Assets Ltd | Real estate | 2018 |
| Light Dreams Freeholds Limited | Real estate | 2025 |
| Light Dreams Property Services Ltd | Real estate | 2016 |
| Light Snow Properties Ltd | Real estate | 2020 |
| Lighthouse Electrical Services Ltd | Construction | 2004 |
| Lila Investments Limited | Real estate | 2016 |
| Lilibet Properties Limited | Real estate | 2022 |
| Lilymayz UK Ltd. | Wholesale & retail | 2015 |
| Lima Plumbing & Heating Limited | Construction | 2019 |
| Limetree Accounting Ltd | Professional & scientific | 2009 |
| Limited Holdings Ltd | Wholesale & retail | 2023 |
| Limo Fitness Limited | Arts & recreation | 2022 |
| LIN CHI Ltd | Hospitality | 2004 |
| Lincoln Harford Solicitors LLP | | 2009 |
| Linden Design Solutions Limited | Professional & scientific | 2010 |
| Linear Property Management Ltd | Real estate | 2022 |
| Lingam Jewellers Ltd | Wholesale & retail | 2014 |
| Lingam Private Ltd | Manufacturing | 2015 |
| Lingoria Ltd | Professional & scientific | 2026 |
| Link Light Ltd | Wholesale & retail | 2021 |
| Linkage Homes UK Limited | Real estate | 2021 |
| Linklynx Ltd | Wholesale & retail | 2023 |
| Links Express Limited | Real estate | 2009 |
| Links Road Limited | Real estate | 2025 |
| LIO Limited | Wholesale & retail | 2015 |
| Lion Locum Services Ltd | Wholesale & retail | 2022 |
| Lion Signs & Blinds Ltd | Wholesale & retail | 2008 |
| Lionacre Holdings Limited | Financial services | 2018 |
| Lionacre Holdings SC Limited | Financial services | 2017 |
| Lionacre Properties (SC) Limited | Real estate | 2017 |
| Lionacre Properties Limited | Real estate | 2018 |
| Lionheart Gyms Ltd | Arts & recreation | 2015 |
| Lions Way Limited | Real estate | 2015 |
| Liore and Indispice Ltd | Wholesale & retail | 2026 |
| Liquorloom Ltd | Wholesale & retail | 2025 |
| Lisa Property Investments Ltd | Real estate | 2024 |
| Lismore Holding Limited | Professional & scientific | 2011 |
| LIT Life Ltd | Wholesale & retail | 2020 |
| LIT Retail Ltd | Wholesale & retail | 2021 |
| Little Bubba's Wellness Ltd | Other services | 2024 |
| Little Charm Jewels Ltd | Wholesale & retail | 2025 |
| Little Elms Management Limited | Households | 1967 |
| Little HUT Designs Limited | Professional & scientific | 2012 |
| Little India Traders Association ( Wembley) Ltd | Other services | 2022 |
| Little Kittens Childminding Limited | Education | 2026 |
| Little Luxuries Boutique Limited | Extraterritorial | 2018 |
| Little Muffins Childcare Limited | Education | 2024 |
| Little Ones Photography Limited | Professional & scientific | 2017 |
| Little Sparks Nursery Ltd | Health & social care | 2014 |
| Little Sparx Nursery Limited | Health & social care | 2025 |
| Litzu Ltd | Construction | 2017 |
| Livago Limited | Real estate | 2024 |
| Live IT Style IT Limited | Wholesale & retail | 2014 |
| Live London Residential Limited | Administrative & support | 2016 |
| Livealth Biopharma (UK) PVT. Ltd | Manufacturing | 2023 |
| Liventis Ltd | Information & communication | 2026 |
| Livestay Investments Ltd | Real estate | 2023 |
| Livestay Ltd | Real estate | 2019 |
| Livestay Sourcing Ltd | Real estate | 2023 |
| Living Stone Church Ltd | Hospitality | 2025 |
| Living With Water Ltd | Construction | 2025 |
| Lixiuj Electronic Technology Ltd | Wholesale & retail | 2023 |
| Liya Milton Ltd | Wholesale & retail | 2025 |
| Liyanage PVT Ltd | Administrative & support | 2024 |
| Liyaria Ltd | Professional & scientific | 2026 |
| LIZ Cooper Limited | Professional & scientific | 2002 |
| Lizon Ltd | Wholesale & retail | 2016 |
| LJS Construction and Consulting Ltd | Construction | 2014 |
| Lkmsuk Ltd | Wholesale & retail | 2011 |
| LKS Software Limited | Information & communication | 2025 |
| Lksn Services Ltd | Construction | 2024 |
| LL Solutions Ltd | Professional & scientific | 2025 |
| LL Tax and Accounting Ltd | Professional & scientific | 2022 |
| Llai Ayuspa Ltd | Other services | 2015 |
| Llann Homes Limited | Construction | 2024 |
| Llann Investment Ltd | Real estate | 2012 |
| Llanover Road Limited | Households | 2005 |
| LLM Enterprise Ltd | Extraterritorial | 2011 |
| Lloyd Accidents & Claims Limited | Professional & scientific | 2018 |
| LLP 98 Ltd | Construction | 2025 |
| LMD Construct Ltd | Construction | 2019 |
| LML Productions Ltd | Arts & recreation | 2017 |
| LN Maintenance Ltd | Construction | 2022 |
| Lnba Ltd | Hospitality | 2026 |
| Loadedz Peri Peri Ltd | Hospitality | 2026 |
| Local Pizza & Chicken Ltd | Hospitality | 2024 |
| Local Residence Ltd | Real estate | 2023 |
| Locum Connection Limited | Information & communication | 2012 |
| Lodhata Limited | Wholesale & retail | 2022 |
| Loftus Engineers Ltd | Professional & scientific | 2026 |
| Loftus Estates Limited | Real estate | 2026 |
| Logical 73 Ltd | Construction | 2014 |
| Logicris Limited | Transport & logistics | 2018 |
| Logixone Services Limited | Transport & logistics | 2026 |
| Lolav Ltd | Other services | 2018 |
| Londinium Bites Limited | Hospitality | 2025 |
| Londinium Investments Limited | Real estate | 2015 |