| Little BOT Games Ltd | Information & communication | 2025 |
| Little Foxes Holdings Limited | Real estate | 2019 |
| Little Green Group Limited | Manufacturing | 2020 |
| Little Monkeys FUN House Ltd | Arts & recreation | 2015 |
| Little Movers Physiotherapy Limited | Health & social care | 2026 |
| Little Sparkles and Stars Limited | Education | 2015 |
| Little Twinkles and Sparkles Ltd | Education | 2022 |
| Littlefish Creative Agency Limited | Manufacturing | 2014 |
| Live Area Limited | Professional & scientific | 2009 |
| Live Futures Limited | Education | 2025 |
| Live Register Ltd | Information & communication | 2012 |
| Live Repair Training Ltd | Information & communication | 2025 |
| Live Well Property Group Limited | Real estate | 2025 |
| Live Wire Electrical Installations Ltd | Construction | 2024 |
| Livery Street Lofts Limited | Construction | 2019 |
| Livery Studio Ltd | Wholesale & retail | 2025 |
| Living NOW Limited | Health & social care | 2004 |
| Lixia Limited | Wholesale & retail | 2021 |
| Liyalysa Limited | Financial services | 2022 |
| Li’L Mass Ltd | Wholesale & retail | 2023 |
| LJR International Limited | Other services | 2018 |
| LKH Alpha Ltd | Construction | 2025 |
| LKH Beta Ltd | Construction | 2025 |
| LKH Charlie Ltd | Construction | 2025 |
| LKO Podiatry Ltd | Health & social care | 2025 |
| LL Accommodations Limited | Hospitality | 2023 |
| Lloyd-Thomas Architects Limited | Professional & scientific | 2002 |
| Lloyd-Thomas Developments Limited | Real estate | 2002 |
| Lltsc Trading Ltd | Arts & recreation | 2026 |
| LMA Housing Ltd | Real estate | 2026 |
| Lmtn Property Limited | Real estate | 2021 |
| Lnhm Properties Ltd | Real estate | 2022 |
| Lobster & Crab Ltd | Hospitality | 2023 |
| Local END of Tenancy Cleaning Ltd | Administrative & support | 2025 |
| Local MAN With a Van Limited | Transport & logistics | 2024 |
| Local Surveyors (Poole) Limited | Professional & scientific | 2013 |
| Local Surveyors Ltd | Extraterritorial | 2013 |
| Local TS Ltd | Transport & logistics | 2021 |
| Localhost Capital Ltd | Financial services | 2024 |
| Localhost Holdings Ltd | Real estate | 2020 |
| Localhost Ltd | Information & communication | 2019 |
| Locality Locums Limited | Professional & scientific | 2020 |
| Lodge and Lakes Designs Limited | Hospitality | 2024 |
| Logate Ltd. | Information & communication | 2015 |
| Logisticology Ltd | Administrative & support | 2024 |
| London State of Mind Ltd | Real estate | 2016 |
| London Therapy Ltd | Health & social care | 2011 |
| London Toon Ltd | Hospitality | 2011 |
| Longsword Investments Limited | Real estate | 2021 |
| Lonsar Consultancy Limited | Professional & scientific | 2011 |
| Lord & Sword Ltd | Other services | 2021 |
| Lord Tzeentch Property Ltd | Administrative & support | 2023 |
| Lork Properties Limited | Real estate | 2026 |
| LOS Perdidos Technology Ltd | Manufacturing | 2021 |
| Lott Bazaar Handmade Gifts CIC | Wholesale & retail | 2024 |
| Lotus Spirit Therapy Ltd | Health & social care | 2021 |
| Loudlocal Limited | Professional & scientific | 2020 |
| Louise Krawczyk Limited | Administrative & support | 2017 |
| Louise Riley Skin Clinic Ltd | Other services | 2026 |
| Love and Labour Ltd. | Wholesale & retail | 2017 |
| Loveday Building Solutions Limited | Construction | 2016 |
| Lowercasedesigns Ltd | Arts & recreation | 2023 |
| Lowther Enterprises Ltd | Professional & scientific | 2015 |
| LOX Hair and Beauty Boutique Ltd | Other services | 2017 |
| Loyalfree Holdings Ltd | Financial services | 2022 |
| LP Cleaning and Property Maintenance Limited | Administrative & support | 2023 |
| LP Financial Consulting Limited | Professional & scientific | 2024 |
| LP Vitto (UK) Limited | Professional & scientific | 2023 |
| LR Builders (Leamington) Limited | Construction | 2017 |
| LSC Warwick Limited | Construction | 2013 |
| Lslawley Ltd | Real estate | 2025 |
| LSP Strategic Planning Ltd | Financial services | 2016 |
| Ltcomm Ltd | Information & communication | 2018 |
| LTT Decorating Services Ltd | Construction | 2021 |
| LUA Limited | Wholesale & retail | 2006 |
| Luchma Properties Ltd | Real estate | 2025 |
| Luck Ltd | Transport & logistics | 2018 |
| Lucky Time Events Ltd | Wholesale & retail | 2026 |
| Lucky Time London Ltd | Extraterritorial | 2026 |
| Luigianos Ltd | Hospitality | 2023 |
| Luis Weir Limited | Information & communication | 2025 |
| Luke J Knight Limited | Information & communication | 2016 |
| Luke Keenan Homes Ltd | Construction | 2025 |
| Luke Seal Performance Training Ltd | Arts & recreation | 2025 |
| Lumiere Psychotherapy Limited | Professional & scientific | 2025 |
| Lumina Mind Ltd | Health & social care | 2024 |
| Lumiq-Live Limited | Other services | 2021 |
| Lumivine Limited | Wholesale & retail | 2024 |
| Lumière PM Studio Ltd | Manufacturing | 2026 |
| Lumnia Consulting Limited | Hospitality | 2015 |
| Luna Investments Ltd | Real estate | 2005 |
| Luna Promotions Limited | Information & communication | 1998 |
| Lusarn Limited | Professional & scientific | 2025 |
| Lusty Media Limited | Professional & scientific | 2024 |
| Lutterworth Swim School Limited | Arts & recreation | 2023 |
| LUX Lupo Ltd | Manufacturing | 2024 |
| Luxor Property Ltd | Real estate | 2018 |
| Luxury Property Partners Ltd | Real estate | 2022 |
| LV Wealth Management Ltd | Financial services | 2024 |
| LVT Solutions Limited | Information & communication | 2023 |