| LGD Handball Ltd | Arts & recreation | 2016 |
| LGP Ceramics Ltd | Arts & recreation | 2023 |
| LGP Unique Ltd | Administrative & support | 2026 |
| LHS Plumbing Services Ltd | Construction | 2014 |
| Lidmarsh Properties Limited | Construction | 1973 |
| Life at Limited | Real estate | 2002 |
| Life Pharmaceuticals Ltd | Transport & logistics | 2003 |
| Lifesmiths LLP | | 2003 |
| Lifetime Care Services Limited | Health & social care | 2022 |
| Lift and Go Construction and Tool Hire Limited | Construction | 2024 |
| Liftandsweat Ltd | Wholesale & retail | 2024 |
| Lightworks Film Limited | Information & communication | 2004 |
| Lilijay Ltd | Wholesale & retail | 2022 |
| Limetown Limited | Administrative & support | 2003 |
| Link Cycling Ltd | Wholesale & retail | 2018 |
| LINK365 Limited | Manufacturing | 2011 |
| Links Electronics Ltd | Wholesale & retail | 2019 |
| Lion & FOX Removals Ltd | Transport & logistics | 2025 |
| Lion Estates Limited | Real estate | 2003 |
| Lion Scaffolding Group Ltd | Construction | 2020 |
| Lion Stone Holdings Ltd | Real estate | 2026 |
| Lion Stone Marble Ltd | Construction | 2012 |
| Lioncrest Development Services Limited | Construction | 2017 |
| Lionstar Limited | Real estate | 2002 |
| Lips Inc Limited | Other services | 2019 |
| Lisa Russell Group Ltd | Health & social care | 2025 |
| Lissus First Ltd | Real estate | 2025 |
| LIT GAS Ltd | Construction | 2026 |
| Little August London Ltd | Wholesale & retail | 2025 |
| Little Birches Childcare Ltd | Education | 2021 |
| Little Birches in Brenchley Ltd | Health & social care | 2022 |
| Little Birches in Chertsey Ltd | Education | 2025 |
| Little Birches in Great Wilbraham Ltd | Education | 2014 |
| Little Birches in Sonning Common Ltd | Education | 2003 |
| Little Birches in ST Nicholas Ltd | Education | 2026 |
| Little Birches in Tunbridge Wells Ltd | Education | 2013 |
| Little Birches WW Ltd | Health & social care | 2018 |
| Little Flickers Limited | Wholesale & retail | 2018 |
| Little Gems Childminding Services Ltd | Health & social care | 2021 |
| Little Lavers Management Limited | Construction | 2018 |
| Little Party Monkeys Events Ltd | Other services | 2022 |
| Little Pond Consulting Limited | Professional & scientific | 2020 |
| Littlecroft Properties Limited | Construction | 1978 |
| Live UN Limited | Information & communication | 2005 |
| Livingston Lodge RTM Company Limited | Households | 2008 |
| LJB Cooling Ltd | Energy | 2018 |
| LJC Management Ltd | Professional & scientific | 2015 |
| LJC Sales Consultancy Limited | Professional & scientific | 2017 |
| LJS Asset Management Ltd | Administrative & support | 2020 |
| Llfc Developments Ltd | Construction | 2026 |
| LLJ Enforcement Services Ltd | Administrative & support | 2024 |
| Lloyds Pickleball Club | Arts & recreation | 2026 |
| Lmanga Plastering Limited | Construction | 2021 |
| LMC Catering Limited | Hospitality | 2019 |
| Lmep FM Limited | Administrative & support | 2025 |
| LNL Holdings Limited | Other services | 2023 |
| LNW Ductwork Limited | Construction | 2023 |
| Lobsternet Limited | Wholesale & retail | 2013 |
| Local Wellness Ltd | Arts & recreation | 2025 |
| Location Standby Service Ltd | Administrative & support | 2023 |
| Lockey Locks Limited | Manufacturing | 2023 |
| Locko Services Ltd | Construction | 2013 |
| Lodgeshine Limited | Administrative & support | 2007 |
| Logham Properties and Investments Limited | Administrative & support | 2012 |
| Logicorp Ltd | Other services | 2018 |
| Logini Bells Ltd | Hospitality | 2024 |
| Logini Borrins Ltd | Health & social care | 2025 |
| Logini Care Contracts Ltd | Health & social care | 2021 |
| Logini Care Solutions Ltd | Health & social care | 2014 |
| Logini Castleford Care Home Ltd | Health & social care | 2022 |
| Logini Croft Ltd | Health & social care | 2025 |
| Logini Finance Limited | Hospitality | 2004 |
| Logini Glyn Thomas Ltd | Health & social care | 2025 |
| Logini Hollies Care Home Ltd | Health & social care | 2021 |
| Logini Old Library Limited | Health & social care | 2022 |
| Logini Properties Ltd | Real estate | 2020 |
| Logini Pubs Ltd | Hospitality | 2017 |
| Logini Rossmere Ltd | Health & social care | 2023 |
| Logini ST Clares Ltd | Health & social care | 2025 |
| Logini Stoneacre Lodge Ltd | Health & social care | 2025 |
| Lomena Limited | Administrative & support | 2001 |
| London & City Properties PLC | Construction | 1985 |
| London & City Property Investments Limited | Administrative & support | 1995 |
| London and Essex Therapy Ltd | Health & social care | 2025 |
| London Build Services Ltd | Construction | 2025 |
| London City Electrics Ltd | Construction | 2020 |
| London Electrical & Testing Limited | Construction | 2015 |
| London Essex Management Limited | Real estate | 2022 |
| London First Construction Ltd | Construction | 2011 |
| London Flooring Solutions Ltd | Construction | 2019 |
| London Green (220-227) Management Limited | Real estate | 1986 |
| London Green (38-43) Management Limited | Real estate | 1987 |
| London Hauliers Ltd | Other services | 2017 |
| London Homeland Ltd | Real estate | 2015 |
| London Life Safety Systems Limited | Administrative & support | 2024 |
| London Light Productions Limited | Hospitality | 2016 |
| London Locksmiths & Grilles Ltd | Administrative & support | 2015 |
| London MEP Group Holdings Ltd | Financial services | 2024 |
| London MEP Group Ltd | Construction | 2016 |
| London New Homes Limited | Construction | 2000 |