| London Scientific Solutions Ltd | Wholesale & retail | 2024 |
| London Scooters Limited | Wholesale & retail | 2024 |
| London Security Services 24/7 Ltd | Administrative & support | 2022 |
| London Sellers Ltd | Wholesale & retail | 2026 |
| London Services (England) Ltd | Wholesale & retail | 2019 |
| London Services 4U Ltd | Administrative & support | 2021 |
| London Seva Services Ltd | Transport & logistics | 2025 |
| London Shooting Supplies Ltd | Wholesale & retail | 2025 |
| London Signs & Awnings Ltd | Construction | 2019 |
| London SRI Sabari Ayyappan Association | Other services | 2014 |
| London Suitables Ltd | Real estate | 2015 |
| London Taxi Business Ltd | Transport & logistics | 2025 |
| London Taxis Airport Ltd | Transport & logistics | 2023 |
| London Teachers Supply Ltd | Administrative & support | 2021 |
| London Tech (England) Limited | Administrative & support | 2022 |
| London Toast Bar Ltd | Hospitality | 2025 |
| London Toilet Hire Ltd | Water & waste | 2024 |
| London Top Clubs Ltd | Administrative & support | 2025 |
| London Top Team Limited | Arts & recreation | 2017 |
| London Traction Limited | Transport & logistics | 2021 |
| London Trade Centre Limited | Other services | 2018 |
| London Tradecenter Ltd | Wholesale & retail | 2014 |
| London Tradesman 24/7 Limited | Construction | 2016 |
| London Tradesmen 24/7 Limited | Construction | 2022 |
| London Training and Consultancy Group Ltd | Administrative & support | 2023 |
| London Transfers UK Ltd | Transport & logistics | 2018 |
| London Travel Centre Ltd | Administrative & support | 2009 |
| London Trophy Sports Limited | Arts & recreation | 2020 |
| London Tuktuk London Ltd | Transport & logistics | 2021 |
| London Tyres (London) Ltd | Wholesale & retail | 2018 |
| London Vehicle Repair Ltd | Wholesale & retail | 2024 |
| London Wardrobes & Beds Limited | Manufacturing | 2026 |
| London Waste and Demolitions Ltd | Construction | 2022 |
| London West Opco Ltd | Hospitality | 2026 |
| London Wholesale Ltd | Wholesale & retail | 2011 |
| London Windows Double Glazing Limited | Manufacturing | 2024 |
| LONDON1 Recruitment Ltd | Professional & scientific | 2023 |
| Londoncab Express Ltd | Transport & logistics | 2025 |
| Londoneducare Ltd | Education | 2026 |
| Londongate CA Ltd | Professional & scientific | 2022 |
| LONDONGLASSES4U Ltd | Households | 2021 |
| Londonhuslorclassified Limited | Other services | 2026 |
| Londonluxurychauffeur (LLC) Limited | Transport & logistics | 2025 |
| Londonshopfitterwindows Ltd | Construction | 2024 |
| Londonwharf Development Limited | Construction | 2017 |
| Londrom Ltd | Construction | 2019 |
| Lonee Solutions Ltd | Construction | 2022 |
| Long HOP Partnership Limited | Hospitality | 2012 |
| Long Leys Properties Ltd | Construction | 2021 |
| Long's Foods Limited | Manufacturing | 2018 |
| Longbridge Properties Limited | Real estate | 2023 |
| Longley Manor RTM Company Ltd | Households | 2013 |
| LONGLIFE247 Ltd | Hospitality | 2019 |
| Longlove Ltd | Other services | 2007 |
| Longtower Limited | Real estate | 2023 |
| Longwood Auto Services Ltd | Wholesale & retail | 2013 |
| Longwyre 7 Ltd | Real estate | 2024 |
| Lonsdale Convenience Store Ltd | Wholesale & retail | 2018 |
| Lonsdale Wines and Grocers Ltd | Wholesale & retail | 1998 |
| Lony Soultion Ltd | Construction | 2022 |
| Look NO Further Building Services Limited | Construction | 2014 |
| Looklookagain Ltd | Wholesale & retail | 2021 |
| Loom to Room Limited | Manufacturing | 2016 |
| Loop Basket Ltd | Wholesale & retail | 2026 |
| Loopflow Solutions Ltd | Administrative & support | 2025 |
| Lootech Consulting Ltd | Information & communication | 2026 |
| Looys Limited | Wholesale & retail | 2025 |
| Lopes Dias Limited | Real estate | 2008 |
| Lord ASK Estates Ltd | Real estate | 2022 |
| Lord International Ltd | Wholesale & retail | 2017 |
| Lord Walthamstow Properties Limited | Real estate | 2016 |
| Lord.Tech Limited | Information & communication | 2017 |
| Lords Bushes Management Limited | Households | 1988 |
| Lords Solicitors LLP | | 2007 |
| Lorecor Property Investment Ltd | Real estate | 2025 |
| Loredanbalantrans Ltd | Transport & logistics | 2018 |
| Loren Building and Landscaping Ltd | Administrative & support | 2017 |
| Loren Nexorix Ltd | Wholesale & retail | 2026 |
| Lorion Tiling Ltd | Construction | 2019 |
| Lorkins Farm Limited | | 1985 |
| Lornette UK Limited | Wholesale & retail | 2012 |
| Lorry Jordi Ltd | Wholesale & retail | 2019 |
| Lory Builders Limited | Construction | 2024 |
| Loryon Ltd | Transport & logistics | 2010 |
| LOS Consulting Limited | Information & communication | 2018 |
| Losa Outfits Ltd | Wholesale & retail | 2024 |
| Lost Legend Games Ltd | Wholesale & retail | 2024 |
| LOT Holdings UK Ltd | Transport & logistics | 2026 |
| Lotus and Stour Ltd | Real estate | 2026 |
| Lotus Assets Management Limited | Real estate | 2026 |
| Lotus Aura Holistic Limited | Other services | 2025 |
| Lotus Co. Ltd | Hospitality | 2020 |
| Lotus Feet Ltd | Real estate | 2025 |
| Lotus IT Solutions Limited | Administrative & support | 2015 |
| Lotus Noor Properties Ltd | Real estate | 2023 |
| Lotus One Consultancy Ltd | Information & communication | 2026 |
| Lotus Packaging Ltd | Wholesale & retail | 2010 |
| Lotus Publishers Limited | Information & communication | 2026 |
| Lotustame Ltd | Real estate | 2015 |
| Lourdes Properties Ltd | Real estate | 2023 |