| Lewala Ltd | Hospitality | 2014 |
| Lewden Ltd | Wholesale & retail | 1946 |
| LGM Property Investments Ltd | Real estate | 2021 |
| LGN Property Ltd | Real estate | 2021 |
| Lgtw Ltd | Construction | 2024 |
| LGV Fixing Ltd | Construction | 2022 |
| LHN Investments Limited | Real estate | 2017 |
| Liberty Demolition Ltd | Agriculture & fishing | 2016 |
| Life Success Development Limited | Health & social care | 2005 |
| Life Vanguard Care Limited | Health & social care | 2024 |
| Lifecycle.Investments Ltd | Financial services | 2025 |
| Lifestiles Central Limited | Professional & scientific | 2009 |
| Lifestiles Ltd | Wholesale & retail | 2004 |
| Light 'N' Easy (Essex) Limited | Manufacturing | 2016 |
| Light Aircraft Maintenance Support Ltd | Manufacturing | 2023 |
| Light UP ME Limited | Construction | 2024 |
| Lightwork Surface Solutions Ltd | Administrative & support | 2026 |
| Lilley Farm Properties Limited | Real estate | 2024 |
| Lime Cleaning Group Ltd | Other services | 2025 |
| Liminal Strategies Limited | Professional & scientific | 2023 |
| Linbec Multi Services Limited | Manufacturing | 2019 |
| Linda Crawford Clinics Ltd | Health & social care | 2011 |
| Lindendash Motorsport Ltd | Wholesale & retail | 2025 |
| Lindendash Multi Services Ltd | Wholesale & retail | 2025 |
| Linfold Management Services 2023 Limited | Professional & scientific | 2023 |
| Link Civil Engineering Limited | Construction | 2014 |
| Link Contracts Limited | Administrative & support | 2013 |
| Link Trading Limited | Administrative & support | 2013 |
| List-Lens Limited | Information & communication | 2026 |
| Little Dunmow Pre-School Ltd | Education | 2020 |
| Little Green Music Limited | Arts & recreation | 2024 |
| Little Hedgehogs Day Nurseries Limited | Health & social care | 2012 |
| Little Hedgehogs Pre-School Limited | Extraterritorial | 2012 |
| Little Hill Foot Ltd | Administrative & support | 2013 |
| Little House Investments Limited | Real estate | 2022 |
| Little Learners & Explorers Ltd | Health & social care | 2024 |
| Little Lily’S Academy Ltd | Health & social care | 2023 |
| Little Notley's Pre-School Limited | Education | 2010 |
| Little Novas Limited | Wholesale & retail | 2025 |
| Little Rainbows Home Nursery Ltd | Health & social care | 2022 |
| Little Yellow Hedgehog Ltd | Hospitality | 2015 |
| Littlebigshark Ltd | Information & communication | 2025 |
| Live by Choice Coaching and Media Academy Ltd | Information & communication | 2025 |
| Livestream.Global Ltd | Information & communication | 2006 |
| Living Energi Limited | Real estate | 2009 |
| Livingstone Global Ltd | Real estate | 2019 |
| LIZ Napier Solutions Limited | Administrative & support | 2014 |
| LJ Oconnor Developments Limited | Real estate | 2020 |
| LJ Simkins Limited | Professional & scientific | 2020 |
| LJO Partners Limited | Financial services | 2018 |
| LJP Consultants Ltd | Administrative & support | 2019 |
| LKR Event Management Limited | Public administration | 2019 |
| LM Shakes Braintree Ltd | Hospitality | 2023 |
| Lmctf Ltd | Education | 2025 |
| LMT Innovation Consultancy Ltd | Professional & scientific | 2022 |
| Lobster Smack Limited | Hospitality | 2025 |
| Lock Fire Consultancy Ltd | Public administration | 2025 |
| Lodge and Sons (Builders) Limited | Construction | 1976 |
| Loftus Farms Limited | Agriculture & fishing | 2025 |
| Logicom Ltd | Transport & logistics | 2025 |
| Logismart Fulfilment Ltd | Transport & logistics | 2023 |
| Loldean Timber LLP | | 2020 |
| London Perfume Factory Ltd | Wholesale & retail | 2014 |
| London River Logistics Limited | Real estate | 1998 |
| Longshaw Holdings Limited | Financial services | 2013 |
| Looking for Cake Limited | Information & communication | 2018 |
| Lorimer Developments Limited | Construction | 2014 |
| Lorms Limited | Construction | 2021 |
| Lossless AV Ltd | Construction | 2024 |
| Lotus Earth Creative Ltd | Wholesale & retail | 2024 |
| Loudcare Solutions Ltd | Administrative & support | 2023 |
| LOV Limited | Real estate | 2004 |
| Love Holidays and Lettings Limited | Hospitality | 2016 |
| Love Nails 03 Limited | Other services | 2026 |
| Lovegrove Engineering Ltd | Other services | 2018 |
| Lovelike Ltd | Information & communication | 2025 |
| Lovi Enterprises Ltd | Wholesale & retail | 2018 |
| LP Property Improvements Ltd | Construction | 2023 |
| LT Accountants Limited | Professional & scientific | 2024 |
| LT Capital Investment Limited | Real estate | 2025 |
| Ltav Limited | Professional & scientific | 2020 |
| Lucid Graphics Limited | Other services | 2002 |
| Luitech Automation Ltd | Professional & scientific | 2018 |
| LUK Stas Ltd | Transport & logistics | 2020 |
| Luke Johnson Photography Ltd | Professional & scientific | 2025 |
| Luke Scully Limited | Information & communication | 2011 |
| Lumen Domus UK Limited | Extraterritorial | 2007 |
| Lumiere Studios Limited | Information & communication | 2006 |
| Lumina Healing Ltd | Health & social care | 2024 |
| Lusso Tanning Ltd | Other services | 2025 |
| Luxeaura Lounge Limited | Other services | 2026 |
| Luxford Theatre Trips Limited | Arts & recreation | 2024 |
| Lydsbutler Limited | Professional & scientific | 2022 |
| Lym.App Ltd | Information & communication | 2024 |
| Lynderswood Park Ltd | Administrative & support | 2014 |
| Lyndseys Beautique Limited | Health & social care | 2026 |
| Lyons Electrical Services Ltd | Construction | 2026 |
| Lyons Hall Business Park LLP | | 2008 |
| M & a Digby Limited | Manufacturing | 2004 |
| M a J Groundworks Limited | Construction | 2019 |