| LIN Property Ltd | Real estate | 2022 |
| Linbuild Limited | Wholesale & retail | 1991 |
| Linc Group Limited | Wholesale & retail | 2019 |
| Lincoln's Property Services Ltd | Real estate | 2004 |
| Lincon Education Ltd | Education | 2012 |
| Lindfield Green Limited | Information & communication | 2023 |
| Lindsey Road Ltd | Real estate | 2024 |
| Line X Group Ltd | Construction | 2024 |
| Linear LUX Group Limited | Construction | 2025 |
| Linefndation IT Ltd | Information & communication | 2025 |
| Linen House 1 Limited | Real estate | 2013 |
| Ling Hall Transport Ltd | Professional & scientific | 2023 |
| Lingeshwara Natyalaya Ltd | Education | 2023 |
| Linguisti Limited | Professional & scientific | 2019 |
| Link Building Specialist PVT Ltd | Other services | 2025 |
| Link Carpentry Ltd | Manufacturing | 2023 |
| Link Properties (Essex) Limited | Real estate | 2022 |
| Link Telecom Enterprise Ltd | Wholesale & retail | 2018 |
| Linkpharm Limited | Wholesale & retail | 2007 |
| Links Estate Agency Limited | Real estate | 2016 |
| Links Legal Conveyancing Ltd | Professional & scientific | 2022 |
| Links Legal Limited | Professional & scientific | 2006 |
| Links Security Services Ltd | Administrative & support | 2021 |
| Links Traders Limited | Other services | 2021 |
| Linkss International Ltd | Real estate | 2015 |
| Linless Limited | Households | 1993 |
| Linqora Ltd | Wholesale & retail | 2026 |
| Lint (Redington Road) Limited | Construction | 2005 |
| Lint Broker Services Limited | Financial services | 2018 |
| Lint Constructions Limited | Construction | 2016 |
| Lint Developments Limited | Construction | 2016 |
| Lint Estate Management Limited | Real estate | 2007 |
| Lint Group Limited | Financial services | 2005 |
| Lintax Services Ltd | Professional & scientific | 2025 |
| Linton Contractors Building & Civil Engineering Limited | Construction | 2001 |
| Lion Development Group Limited | Construction | 2020 |
| Lion Group (London) Ltd | Construction | 2015 |
| Lion Technologies Limited | Information & communication | 2024 |
| Lions Air CON Ltd | Energy | 2025 |
| Lionsdean Limited | Hospitality | 2025 |
| Lion’S Best Building Ltd | Construction | 2025 |
| Lipcote & Co Limited | Manufacturing | 2017 |
| Lipy Ltd | Transport & logistics | 2026 |
| Liquid Flow Ltd | Wholesale & retail | 2025 |
| Liquid Glug Limited | Transport & logistics | 2004 |
| Lisa Nugent Financial Planning Limited | Financial services | 2019 |
| Lish Aesthetics Ltd | Other services | 2023 |
| Lishaan Properties Ltd | Real estate | 2024 |
| Lisk Inshur Ltd | Information & communication | 2026 |
| Listed Group Ltd | Administrative & support | 2021 |
| Listening to Your Voice Limited | Other services | 2015 |
| Liswaak Ltd | Wholesale & retail | 2025 |
| LIT 1 Ltd | Real estate | 2026 |
| Lita Building Services Ltd | Construction | 2016 |
| Lita Projects Ltd | Construction | 2014 |
| Lite Events Ltd | Administrative & support | 2025 |
| Literally Need Ltd | Wholesale & retail | 2019 |
| Litewave Limited | Wholesale & retail | 2025 |
| Little Bees Preschool Ltd | Health & social care | 2025 |
| Little Bloom Childcare Limited | Health & social care | 2026 |
| Little Einsteins Childcare Services Limited | Education | 2018 |
| Little Foxes Foundation | Arts & recreation | 2010 |
| Little Giants Nursery Limited | Education | 2010 |
| Little London Farm Chigwell Ltd | Education | 2025 |
| Little Ones London Ltd | Health & social care | 2025 |
| Little PIG Properties Ltd | Professional & scientific | 2016 |
| Little Rainbow Nursery Limited | Education | 2009 |
| Little Robes Royale Limited | Wholesale & retail | 2015 |
| Little Stars (Ilford) Ltd | Education | 2024 |
| Liuxia Jane Limited | Wholesale & retail | 2025 |
| Livarch Group Ltd | Real estate | 2024 |
| Livarch Homes Ltd | Construction | 2025 |
| Livarch Limited | Professional & scientific | 2016 |
| Livcriss Builders Ltd | Construction | 2020 |
| Livdo Serv Ltd | Construction | 2025 |
| Live Accounts London Limited | Professional & scientific | 2013 |
| Live Autos Limited | Wholesale & retail | 2023 |
| Livedoor Ltd | Information & communication | 2009 |
| Lively Traders Ltd | Wholesale & retail | 2023 |
| Liverpool 2024 Ltd | Real estate | 2024 |
| Living Key Estates Ltd | Real estate | 2025 |
| Livora Property Management Ltd | Real estate | 2025 |
| Livwise Ltd | Real estate | 2022 |
| Livyn Ltd | Real estate | 2026 |
| Liya AK Ltd | Wholesale & retail | 2024 |
| LIYAHSTYL3S Ltd | Other services | 2023 |
| LIZ Norton Change Analyst Limited | Information & communication | 2022 |
| LJ Investments Ltd | Other services | 2010 |
| LJB Security Ltd | Administrative & support | 2001 |
| LJN Analysis Ltd | Administrative & support | 2026 |
| LJP Autos Ltd | Wholesale & retail | 2015 |
| LJS Renewables Ltd | Construction | 2025 |
| LJS Trade Ltd | Wholesale & retail | 2025 |
| LK Capital Group Limited | Construction | 2021 |
| LK Families Hand Ltd | Professional & scientific | 2019 |
| LK Football Ltd | Arts & recreation | 2018 |
| Lk's Property Services Limited | Other services | 2018 |
| LKE Property Limited | Real estate | 2020 |
| LLA Chai Ltd | Hospitality | 2024 |
| Llanharan Service Station Limited | Wholesale & retail | 2023 |