| Lincoln Real Estate Ltd | Real estate | 2019 |
| Line Design Ltd | Construction | 2016 |
| Linen Express London Ltd | Other services | 2021 |
| Linford Homes Ltd | Real estate | 2017 |
| Linghang Building Material Co., Ltd | Administrative & support | 2020 |
| Link House London Ltd | Other services | 2015 |
| Linklearn Ltd | Education | 2021 |
| Links World Wholesale Ltd | Wholesale & retail | 2019 |
| Linpharm Limited | Health & social care | 2014 |
| Linx News Limited | Information & communication | 2000 |
| Linx Productions Limited | Extraterritorial | 1999 |
| Lionhex Ltd | Construction | 2024 |
| Liquid Waterproofing Specialist Ltd | Construction | 2023 |
| Lisa Nguyen Nails Ltd | Other services | 2022 |
| Liss Home Limited | Real estate | 2023 |
| Lissus FC Ltd | Wholesale & retail | 2024 |
| Liston Law Practice Limited | Professional & scientific | 2017 |
| Lita Vita Limited | Arts & recreation | 2025 |
| Lite Consultancy UK Limited | Professional & scientific | 2016 |
| Litearts Limited | Arts & recreation | 2003 |
| Literiver Properties Ltd | Real estate | 2022 |
| Literiver Services Limited | Construction | 2011 |
| Little Assembly Limited | Information & communication | 2013 |
| Little Beauty Boutique Ltd | Other services | 2014 |
| Little Companions Limited | Education | 2012 |
| Little Green Acres Mobile Home Park Ltd | Real estate | 2022 |
| Little Stars Pre-School Group | | 1999 |
| Little Stars Preschool Nursery Ltd | Health & social care | 2016 |
| Little Tracks Limited | Real estate | 2022 |
| Liverpool 55 Ltd | Real estate | 2019 |
| Lixlina Limited | Administrative & support | 2023 |
| LJ Copywriting Limited | Professional & scientific | 2017 |
| Ljcarter Ltd | Professional & scientific | 2023 |
| LK Mortgage and Finance Ltd | Financial services | 2021 |
| LL Metal Material Technology Co. Ltd. | Administrative & support | 2023 |
| Llano Electronic Limited | Wholesale & retail | 2022 |
| Llewoh Ltd | Wholesale & retail | 2024 |
| Lloyd Park Nursing Home Ltd | Health & social care | 2011 |
| Lloyd Richard Stewart Limited | Extraterritorial | 2022 |
| Lloyds Trading (UK) Limited | Financial services | 2012 |
| LM Meta Limited | Information & communication | 2021 |
| LMG & Sons Ltd | Construction | 2024 |
| Lmhr Limited | Professional & scientific | 2017 |
| LMS Sheridans (Ruislip) Ltd | Real estate | 2024 |
| LMT Global Ltd | Professional & scientific | 2019 |
| LMV Tutoring Ltd | Education | 2019 |
| LNP Holdings Ltd | Financial services | 2023 |
| Lo-Content Partners UK Limited | Professional & scientific | 2015 |
| LOANS4HOMES Limited | Financial services | 2020 |
| Local Roofing Consultants Ltd | Construction | 2022 |
| Lochlease Limited | Households | 1995 |
| Locks Eleven Limited | Construction | 2007 |
| Locum Excellence Limited | Health & social care | 2015 |
| Locus Freehold Limited | Real estate | 2011 |
| Lodge Logistics Limited | Transport & logistics | 2015 |
| Loft. Whole Together Ltd | Other services | 2022 |
| Loftus Engineering Services Ltd. | Construction | 2008 |
| Logikarl Automotive Limited | Wholesale & retail | 2024 |
| Loginex Limited | Wholesale & retail | 2026 |
| Lollipop Interiors Limited | Other services | 2018 |
| Loma Thai Ltd | Hospitality | 2025 |
| Londinium Limo Ltd | Transport & logistics | 2025 |
| Londis Cippenham Ltd | Wholesale & retail | 2020 |
| London Accountancy & Tax Services Ltd | Professional & scientific | 2017 |
| London Aesthetic College Ltd | Health & social care | 2025 |
| London and Home Counties Limited | Construction | 1982 |
| London Blast Contracts Ltd | Construction | 2016 |
| London Boiler Expert.Com Limited | Construction | 2012 |
| London Building Services Ltd | Construction | 2026 |
| London BUS Group Limited | Transport & logistics | 2009 |
| London Business Management Limited | Other services | 2018 |
| London Chiropractic Services Ltd | Health & social care | 2019 |
| London Delivery Network Group Ltd | Transport & logistics | 2024 |
| London Design and Woodwork Ltd | Manufacturing | 2019 |
| London Direct Services International Ltd | Professional & scientific | 1994 |
| London Eagle Company Ltd | Hospitality | 2020 |
| London Estates Investment Ltd | Real estate | 2024 |
| London Gate Security Ltd | Administrative & support | 2022 |
| London Gynae Cancer Limited | Health & social care | 2018 |
| London Hostels Ltd | Hospitality | 2013 |
| London Interior Blinds Limited | Manufacturing | 2018 |
| London International College of Graduate Studies Ltd | Education | 2024 |
| London Luxury Chauffeuring Ltd | Transport & logistics | 2013 |
| London Luxury Concierge Services Ltd | Transport & logistics | 2023 |
| London Luxury Jets Ltd | Transport & logistics | 2023 |
| London Luxury Property Group Ltd | Real estate | 2026 |
| London Luxury Servicing Ltd | Administrative & support | 2018 |
| London Movie Mills Limited | Information & communication | 2009 |
| London Outlet Store Limited | Wholesale & retail | 2017 |
| London Painting Facilities Limited | Construction | 2020 |
| London Strength Ltd | Education | 2019 |
| London Tamil Media Ltd | Professional & scientific | 2012 |
| London View Properties Ltd | Real estate | 2022 |
| London Wealth Ltd | Professional & scientific | 2020 |
| London West Cycling Ltd | Extraterritorial | 2025 |
| London West Velo Ltd | Extraterritorial | 2025 |
| London Windscreen Ltd | Wholesale & retail | 2022 |
| London World Limited | Transport & logistics | 2021 |
| Londoner Trades Ltd | Wholesale & retail | 2024 |
| Londsy Ltd | Wholesale & retail | 2019 |