| Locke Consulting Ltd | Professional & scientific | 2014 |
| Locke Investments Limited | Real estate | 2014 |
| Locksley Services Ltd | Other services | 2024 |
| Lockwood & Wallace Ltd | Professional & scientific | 2025 |
| Locky Consultancy Ltd | Professional & scientific | 2021 |
| Loco Coco S & C Ltd | Wholesale & retail | 2024 |
| Lodax Appliance Repair Limited | Other services | 2019 |
| Lodge Road Care Limited | Real estate | 2022 |
| Lodore F&M Services Limited | Administrative & support | 2023 |
| Logic GAS Ltd | Real estate | 2025 |
| Logica Software Ltd | Information & communication | 2021 |
| Logical Minds IT Solutions Limited | Information & communication | 2018 |
| Logos Ventures Ltd | Health & social care | 2023 |
| Loja DE GOA Ltd | Wholesale & retail | 2026 |
| Lokc Limited | Information & communication | 2015 |
| LOKESH1 Construction Ltd | Construction | 2024 |
| Loli Imports & Exports Ltd | Wholesale & retail | 2021 |
| Lollyjay Concepts Ltd | Information & communication | 2018 |
| Lomas Electrical Ltd | Construction | 2017 |
| Lombardy Properties Limited | Construction | 1986 |
| London AAT Services Ltd | Administrative & support | 2017 |
| London Acupuncture Clinic Limited | Health & social care | 2007 |
| London Airport Drive Ltd | Wholesale & retail | 2019 |
| London Apartments World Limited | Administrative & support | 2019 |
| London Arabian Ltd | Wholesale & retail | 2025 |
| London Author House Ltd | Information & communication | 2026 |
| London Auto Experts Limited | Wholesale & retail | 2023 |
| London Autos Ltd | Wholesale & retail | 2023 |
| London BED Company Limited | Extraterritorial | 1992 |
| London BIN Hygiene Ltd | Administrative & support | 2015 |
| London Bros Construction UK Ltd | Construction | 2026 |
| London Brothers Construction Ltd | Construction | 2024 |
| London City Educators Limited | Education | 2021 |
| London Collectiion Ltd | Wholesale & retail | 2025 |
| London College of Practical Studies Ltd | Education | 2023 |
| London Cooking Oils Ltd | Water & waste | 2024 |
| London Domestic Windows Limited | Construction | 2020 |
| London Ductwork Steel Ltd | Construction | 2025 |
| London Energy Consultants Limited | Professional & scientific | 2016 |
| London Executive Tours Ltd | Transport & logistics | 2020 |
| London Fruit & VEG Emporium Ltd | Wholesale & retail | 2007 |
| London GAS Engineers Ltd | Construction | 2012 |
| London GB Properties Ltd | Real estate | 2025 |
| London Getaways Ltd | Real estate | 2024 |
| London Heathrow Cars Limited | Transport & logistics | 2009 |
| London Heating and GAS Services Limited | Construction | 2024 |
| London Home Lettings Ltd | Real estate | 2026 |
| London Homes Construction Ltd | Construction | 2022 |
| London International Group Limited | Financial services | 1950 |
| London Leadership Ltd | Information & communication | 2025 |
| London Location Service Limited | Real estate | 2018 |
| London LUX Limited | Transport & logistics | 2021 |
| London Luxury Tours Ltd | Administrative & support | 2019 |
| London Medical & Aesthetics Ltd | Education | 2023 |
| London Medical Suppliers Ltd | Health & social care | 2016 |
| London Metals Group Ltd | Financial services | 2026 |
| London Metropolis Lettings Ltd | Real estate | 2025 |
| London Open Management Ltd | Administrative & support | 2022 |
| London QS & Estimating Ltd | Professional & scientific | 2019 |
| London Security Training Academy UK Ltd | Education | 2015 |
| London Southbank Process Enterprise Ltd | Professional & scientific | 2018 |
| London Stag Properties Ltd | Households | 2023 |
| London Super Car Ltd | Transport & logistics | 2018 |
| London Supplement Company Ltd | Wholesale & retail | 2021 |
| London Tavistock Consulting Ltd | Health & social care | 2023 |
| London Trade Windows & Doors Ltd | Construction | 2019 |
| London Trading Academy Ltd | Education | 2019 |
| London United Chauffeurs Ltd | Transport & logistics | 2016 |
| London VIP Travel Ltd | Transport & logistics | 2017 |
| London's GAS Limited | Manufacturing | 2010 |
| Londongadgetgen Limited | Wholesale & retail | 2025 |
| Long-Haul Transport Ltd | Manufacturing | 2026 |
| Longbridge Deverill Care Limited | Health & social care | 2022 |
| Longford Building Services Ltd | Real estate | 2002 |
| Longley Hall Limited | Health & social care | 2012 |
| Longley Hall Yorkshire Ltd | Health & social care | 2024 |
| Longlook Holdings Limited | Information & communication | 2025 |
| LOOKS13 Hair Ltd | Other services | 2023 |
| Loomycraft Ltd | Wholesale & retail | 2024 |
| Loooook! Ltd | Other services | 2021 |
| Loop Distributions Ltd | Wholesale & retail | 2023 |
| Loop Products Ltd | Manufacturing | 2023 |
| Lopoco Ltd | Financial services | 2022 |
| Lords Transport Limited | Transport & logistics | 2025 |
| Loreno LDN Ltd | Wholesale & retail | 2017 |
| Lost in London Ltd | Arts & recreation | 2010 |
| Lotus Care Link Ltd | Health & social care | 2017 |
| Lotus Island Properties Ltd | Real estate | 2025 |
| Lotus Kitchen 98 Ltd | Hospitality | 2025 |
| Lotus Life Safety Ltd | Public administration | 2022 |
| Lotus Parking Ltd | Hospitality | 2025 |
| Louis Hopkins Building Ltd | Construction | 2021 |
| Lounge 16 Ltd | Hospitality | 2023 |
| Louvelle Ltd | Other services | 2025 |
| Love Gardening Services Ltd | Administrative & support | 2025 |
| Love Ghotra Transport Ltd | Transport & logistics | 2025 |
| Love My Cleaner Slough Ltd | Administrative & support | 2026 |
| Love the Beat Ltd | Other services | 2011 |
| Love YOU ALL Ltd | Manufacturing | 2019 |
| Lovelock Property Services Ltd | Manufacturing | 2022 |