| Lilybank Associates Limited | Health & social care | 2014 |
| Limchingbung Medical Services Ltd | Health & social care | 2024 |
| Lime Tree Lodge Ltd | Health & social care | 2022 |
| Limechilli Ltd | Manufacturing | 2026 |
| Limitless Freedom Ltd | Arts & recreation | 2022 |
| Limitless Rigging Ltd | Arts & recreation | 2021 |
| Limma Limited | Real estate | 2021 |
| Lindsay Estates (Aylesbury) Limited | Real estate | 1999 |
| Lindsay Properties Limited | Real estate | 1996 |
| Link Agri Ltd | Wholesale & retail | 2026 |
| Link Building Mastery Limited | Professional & scientific | 2024 |
| Link Gadgets Ltd | Wholesale & retail | 2024 |
| Link Management Group Limited | Professional & scientific | 2000 |
| Linkflights Travel Ltd | Administrative & support | 2026 |
| Linklife Limited | Wholesale & retail | 2001 |
| Linx Ltd | Administrative & support | 2025 |
| Lion Crest Holdings Limited | Real estate | 2009 |
| Lioness Fitness Ltd | Arts & recreation | 2025 |
| Liora Lane Limited | Wholesale & retail | 2025 |
| Lipwood House Limited | Construction | 2019 |
| Liquid Lighting UK Limited | Information & communication | 2013 |
| Lisann International Limited | Manufacturing | 1988 |
| Lisony Accounting Limited | Professional & scientific | 2022 |
| Litemove Limited | Real estate | 2014 |
| Little Bird Property Limited | Real estate | 2020 |
| Little Brambles ( Holdings) Limited | Real estate | 2022 |
| Little Glass Pictures Ltd | Information & communication | 2018 |
| Little Home Learners Ltd | Education | 2026 |
| Little Italy Espresso Bar Limited | Hospitality | 2005 |
| Little Karma Co. Ltd | Manufacturing | 2020 |
| Little Lions Sport Limited | Arts & recreation | 2017 |
| Little London Smallholdings Limited | Financial services | 2022 |
| Little Munden Equestrian Ltd | Agriculture & fishing | 2013 |
| Little Olive Company Ltd | Other services | 2017 |
| Little Tots Nurseries Limited | Health & social care | 2004 |
| Littlewick Homes Ltd | Construction | 2024 |
| Live Sharer Ltd | Information & communication | 2022 |
| Live Without Records Ltd | Manufacturing | 2025 |
| Livetourism Limited | Arts & recreation | 2003 |
| Livewire Industries Limited | Professional & scientific | 1997 |
| Living Energy SPV 99 Limited | Energy | 2015 |
| Living Horizon Ltd | Health & social care | 2012 |
| Livingbe Limited | Real estate | 2018 |
| Livjens Health Limited | Health & social care | 2024 |
| Lizdon UK Limited | Construction | 2018 |
| LJ Khoury Ltd | Professional & scientific | 2023 |
| Lkee Care Services Limited | Health & social care | 2020 |
| Lkee Childcare Services Limited | Education | 2020 |
| Lkee Property Investments Ltd | Real estate | 2023 |
| LKM Carpentry Ltd | Construction | 2026 |
| LL Finance Ltd | Professional & scientific | 2021 |
| Lloyd & Simms | | 1997 |
| LLR Limited | Wholesale & retail | 2012 |
| Llumarlite (Holdings) Ltd | Professional & scientific | 2010 |
| Llumarlite Limited | Manufacturing | 1990 |
| LM Brickwork Ltd | Construction | 2026 |
| LM Finance Consulting Ltd | Professional & scientific | 2026 |
| Lm's Garden Maintenance Ltd | Administrative & support | 2020 |
| LMA Trans Limited | Transport & logistics | 2026 |
| LMC Haulage Ltd | Transport & logistics | 2025 |
| LME Medical Services Ltd | Health & social care | 2013 |
| LMK Accounting Ltd | Professional & scientific | 2014 |
| LMS Drylining Limited | Construction | 2018 |
| LMV Content Studio Ltd | Information & communication | 2026 |
| Lnewlf Ltd | Wholesale & retail | 2021 |
| LNG Drylining Ltd | Construction | 2023 |
| Lobby Accommodation Ltd | Real estate | 2023 |
| Lobon Morees Ltd | Hospitality | 2022 |
| LOCAL71 Ltd | Professional & scientific | 2023 |
| Lochdown Limited | Extraterritorial | 2020 |
| Lock & Roll Financial Services Ltd | Financial services | 2017 |
| Lockfit Aylesbury Ltd | Administrative & support | 2022 |
| Locklance Consulting Limited | Wholesale & retail | 2025 |
| Lockwell Hill Farming Limited | Agriculture & fishing | 2018 |
| Logan Light Studios Ltd | Arts & recreation | 2019 |
| Logi Services Ltd | Information & communication | 2024 |
| Logical Safety Solutions Ltd | Professional & scientific | 2020 |
| Logik Real Estates Ltd | Real estate | 2021 |
| Logixtrade Ltd | Wholesale & retail | 2025 |
| Lois Hillier Creative Limited | Professional & scientific | 2021 |
| Lok-It Ltd | Manufacturing | 2026 |
| Lola Maria Limited | Hospitality | 2025 |
| Lomax Projects Ltd | Construction | 2025 |
| London Buildings (Camden) Limited | Real estate | 1994 |
| London Buildings (Commercial) Limited | Real estate | 2022 |
| London Buildings (Highgate) Limited | Real estate | 1996 |
| London Buildings (Spitfire) Limited | Real estate | 2013 |
| London Buildings Holdings Limited | Financial services | 1994 |
| London Buildings Project Management Limited | Professional & scientific | 1992 |
| London Mobile Bar Company Ltd | Hospitality | 2017 |
| London Pro Plumbing Ltd | Construction | 2026 |
| London Road Business Park Management Limited | Real estate | 2012 |
| London School of Business & Innovation Technologies Ltd | Education | 2026 |
| London Superior Gardens Ltd | Real estate | 2014 |
| Lonegenius Software Limited | Information & communication | 2004 |
| Long Crendon (Stevens Close) Management Company Ltd | Households | 2026 |
| Long Crendon Football Club Limited | Arts & recreation | 2022 |
| Long Crendon Manor Estates Ltd | Agriculture & fishing | 2014 |
| Long Story Short Media Ltd | Professional & scientific | 2015 |
| Longbow International Limited | Administrative & support | 2025 |