| Logan Property Services Limited | Real estate | 2017 |
| Logicline Trunks Limited | Other services | 2009 |
| Logistics Consulting Solutions Ltd | Transport & logistics | 2010 |
| LOJ Enterprise Limited | Wholesale & retail | 2019 |
| Lokoj Bangla-Uk CIC | Arts & recreation | 2025 |
| Lomedo Services Limited | Health & social care | 2016 |
| Londek Southend Ltd | Wholesale & retail | 2025 |
| London Aggregate Supplies Ltd | Construction | 2011 |
| London Ancient Coins Limited | Wholesale & retail | 2010 |
| London Basements Limited | Construction | 2017 |
| London City Accommodation Ltd | Real estate | 2021 |
| London College of Cosmetics Ltd | Education | 2025 |
| London EYE Studio Limited | Professional & scientific | 2020 |
| London Freelance Collective Limited | Professional & scientific | 2026 |
| London Guidewall Contractors Limited | Construction | 2017 |
| London Horizons Limited | Manufacturing | 1997 |
| London Local Skips Limited | Water & waste | 2014 |
| London School of Trade Ltd | Education | 2023 |
| London South East Holdings Ltd | Financial services | 2019 |
| London South East Limited | Information & communication | 2007 |
| London Southend Airport Company Limited | Transport & logistics | 1993 |
| London Southend Aviation Services Limited | Transport & logistics | 2022 |
| London Southend JET Centre Limited | Transport & logistics | 2017 |
| London Southend Solar Limited | Energy | 2014 |
| London Taxi Fleet Services Ltd | Administrative & support | 2013 |
| London Transport Company Import & Export Ltd | Transport & logistics | 2017 |
| London Wine Rooms Ltd | Manufacturing | 2011 |
| Londono Global Limited | Professional & scientific | 2024 |
| Londvs Ltd | Professional & scientific | 2023 |
| Lone Star Amusements Limited | Arts & recreation | 2023 |
| Lone Star Leisure Limited | Arts & recreation | 2023 |
| Lonec Property Development Ltd | Real estate | 2016 |
| Lonely Planet Ltd | Hospitality | 2025 |
| Long Pier Limited | Wholesale & retail | 2023 |
| Long Term Investments (PRS 1) Limited | Real estate | 2005 |
| Long Term Investments (PRS 2) Limited | Real estate | 2005 |
| Long Term Investments (PRS 3) Limited | Real estate | 1999 |
| Long Term Investments (PRS) Holdings Limited | Professional & scientific | 2002 |
| Long Term Reversions (Cambridge) Limited | Real estate | 2006 |
| Long Term Reversions (Dulwich) Limited | Real estate | 1999 |
| Long Term Reversions (Glastonbury) Limited | Real estate | 1989 |
| Long Term Reversions (Gloucester) Limited | Real estate | 2005 |
| Long Term Reversions (Harrogate) Limited | Real estate | 1989 |
| Long Term Reversions (Housing) Limited | Extraterritorial | 2015 |
| Long Term Reversions (Penzance) Limited | Real estate | 1996 |
| Long Term Reversions (Shrewsbury) Limited | Real estate | 1999 |
| Long Term Reversions (Torquay) Limited | Real estate | 1999 |
| Long Term Reversions (Winchester) Limited | Real estate | 2002 |
| Long Term Reversions Limited | Real estate | 1945 |
| Long Term Reversions NO 1 Limited | Real estate | 2002 |
| Longevity Solutions Group Ltd | Professional & scientific | 2025 |
| Longhedge Village (Salisbury) Management Company Limited | Households | 2016 |
| Longridge Contracts Limited | Construction | 2004 |
| Look Beautiful Limited | Wholesale & retail | 2013 |
| Looking Good Consultants Limited | Wholesale & retail | 2014 |
| Lord Anthony Services Limited | Construction | 1997 |
| Lords Court Management Company Limited | Real estate | 2005 |
| Lordsec Ltd | Real estate | 2022 |
| Lotus Support Ltd | Professional & scientific | 2021 |
| LOU Morgan Limited | Other services | 2009 |
| Loughrigg View Limited | Households | 1994 |
| Love Camp Ltd | Hospitality | 2024 |
| Love Rocks Ltd | Professional & scientific | 2020 |
| LOW Level Ltd | Transport & logistics | 2013 |
| LOW Moor Meadows (Morley) Management Company Limited | Households | 2018 |
| Lowden Plumbing and Heating Ltd | Construction | 2017 |
| Lowes Estates Limited | Real estate | 2025 |
| Lowman Limited | Construction | 2008 |
| Lowman Plant Limited | Administrative & support | 2025 |
| Loyalty Risk & Security Group Ltd | Administrative & support | 2023 |
| Loylap Ltd | Information & communication | 2020 |
| LR Accountancy Services Ltd | Professional & scientific | 2022 |
| Lrhosting Limited | Information & communication | 2006 |
| Lrnw Investments Limited | Households | 2021 |
| Lsataxi Ltd | Transport & logistics | 2019 |
| Lsca Holdings Ltd | Real estate | 2023 |
| LSL Construction Group Ltd | Construction | 2025 |
| LSL Global Commerce Ltd | Wholesale & retail | 2023 |
| LTC Construction Group Limited | Manufacturing | 2019 |
| LTR (Altitude Point) Limited | Real estate | 2020 |
| LTR (Axium) Limited | Real estate | 2021 |
| LTR (Baronet) Limited | Extraterritorial | 2017 |
| LTR (Bedford House) Limited | Extraterritorial | 2012 |
| LTR (Bermondsey Works) Limited | Real estate | 2020 |
| LTR (Bourchier Court) Limited | Real estate | 2021 |
| LTR (Caledonian Road) Limited | Real estate | 2020 |
| LTR (Hexagon) Limited | Real estate | 2022 |
| LTR (Legacy) Limited | Real estate | 2020 |
| LTR (Liberty Building) Limited | Real estate | 2015 |
| LTR (Manchester Gardens) Limited | Extraterritorial | 2017 |
| LTR (Regency Heights) Limited | Real estate | 2021 |
| LTR (Riverwalk) Limited | Real estate | 2015 |
| LTR (UK) Developments Limited | Extraterritorial | 2015 |
| LTR (Venue) Limited | Real estate | 2021 |
| LTR (Victoria Point) Limited | Real estate | 2021 |
| LTR 1 Limited | Real estate | 2016 |
| LTR 10 Limited | Real estate | 2022 |
| LTR 11 Limited | Real estate | 2022 |
| LTR 12 Limited | Real estate | 2022 |
| LTR 13 Limited | Real estate | 2022 |