| Lambert-Montague Education Ltd | Education | 2022 |
| Lambeth Labour Limited | Extraterritorial | 2016 |
| Lambov Interiors Ltd | Construction | 2015 |
| Lamor Productions Ltd | Arts & recreation | 2025 |
| Lancashire Associates Ltd | Professional & scientific | 2016 |
| Lancaster Financial Limited | Professional & scientific | 2026 |
| Lancaster Group Limited | Professional & scientific | 1967 |
| Land Bureau (Southern) Limited | Professional & scientific | 2013 |
| Land Enterprises Limited | Real estate | 1998 |
| Land Girls JH Limited | Administrative & support | 2013 |
| Land Legal Ltd | Professional & scientific | 2017 |
| Landews Meadow Farm LLP | | 2015 |
| Landlord Advice Line Limited | Education | 2013 |
| Landscaping in Kent Ltd | Agriculture & fishing | 2018 |
| Landsmore Group Limited | Financial services | 2020 |
| Landsmore Purley Ltd | Real estate | 2020 |
| Lanegan Services Limited | Professional & scientific | 2022 |
| Lanesra Properties Ltd | Real estate | 2023 |
| Lanfranc Limited | Construction | 2013 |
| Lang Building & Landscaping Services Ltd | Construction | 2024 |
| Lang Contractors Ltd | Construction | 2016 |
| Langley Commercials Limited | Wholesale & retail | 2024 |
| Language Choices Limited | Extraterritorial | 2009 |
| Lanrod Limited | Wholesale & retail | 2025 |
| Lanseyecare Limited | Wholesale & retail | 2010 |
| Lapa Distribution UK Ltd | Extraterritorial | 2009 |
| Laport Services Limited | Professional & scientific | 2021 |
| Lapse Ltd | Information & communication | 2019 |
| Larkin Electrical Limited | Professional & scientific | 2012 |
| Lash Lust Limited | Other services | 2019 |
| Lashenden Cafe Limited | Hospitality | 2025 |
| Last Minute DOT COM SAP Trainers Ltd | Administrative & support | 2016 |
| Lastgate Limited | Real estate | 1988 |
| Lattice Property Projects Limited | Real estate | 2019 |
| Laudecor Limited | Construction | 2023 |
| Laughing Chili Ltd | Arts & recreation | 2018 |
| Laughland Jones Limited | Administrative & support | 2004 |
| Laura Clifton Holt Limited | Real estate | 2022 |
| Laura Massey Design Ltd | Arts & recreation | 2012 |
| Laura Nails Ltd | Other services | 2026 |
| Laura's Beauty Corner Ltd | Other services | 2021 |
| Laurel Court (Ashford) Management Limited | Households | 2022 |
| Laurel Exec Limited | Transport & logistics | 2022 |
| Laurel Tree Management Ltd | Households | 2025 |
| Lauxor Salon Ltd | Other services | 2026 |
| Lavania Ltd | Transport & logistics | 2022 |
| Lavender 24 Health Care Ltd | Health & social care | 2022 |
| Lavender’S Window Cleaning Company Limited | Administrative & support | 2022 |
| Lavington Design Limited | Arts & recreation | 2014 |
| Law Plastering (Kent) Ltd | Construction | 2024 |
| Law Training Centre (Canterbury) Ltd | Education | 2018 |
| Lawford International Limited | Extraterritorial | 1991 |
| Lawns One Ltd | Administrative & support | 2008 |
| Lawsons Enterprises Ltd | Information & communication | 2025 |
| LB Roofing Specialist Ltd | Construction | 2018 |
| LBS Sahaya Ltd | Professional & scientific | 2020 |
| LBS Wealth Ltd | Professional & scientific | 2025 |
| LCD Holding Limited | Administrative & support | 2016 |
| LCE Global Logistics Limited | Financial services | 2004 |
| LCH Kent Ltd | Wholesale & retail | 2026 |
| LCH Properties Ltd | Real estate | 2026 |
| Lcme Ltd | Construction | 2020 |
| LCS Site Services Limited | Construction | 2011 |
| LD Chipping Ltd | Information & communication | 2021 |
| LD Detailing & Valet Ltd | Administrative & support | 2025 |
| LD Drainage & Construction Ltd | Construction | 2024 |
| LDC Direct Ltd | Construction | 2014 |
| LDC Irrigation & Landscaping Ltd | Administrative & support | 2021 |
| Ldmp Ltd. | Information & communication | 2006 |
| LDN Project Services Ltd | Construction | 2015 |
| LE Pet Express Ltd | Transport & logistics | 2015 |
| LE Simba Ltd | Real estate | 2020 |
| Leacroft Electrical Services Limited | Construction | 2013 |
| Leacroft Kitchens and Bathrooms Limited | Construction | 2019 |
| Leaders Property Partnerships Limited | Real estate | 2024 |
| Leadhammer Ltd | Professional & scientific | 2025 |
| Leading Conservatories Ltd | Construction | 2021 |
| Leading Construction Limited | Manufacturing | 2018 |
| Leading Social Work Limited | Health & social care | 2023 |
| Leafield Dental Surgery LLP | | 2007 |
| Leagues UK Commercial Co., Ltd | Wholesale & retail | 2022 |
| Lean 5S Products UK Ltd | Other services | 2022 |
| Lean Transformation Group Ltd | Professional & scientific | 2019 |
| Leanne Willoughby Art Ltd | Arts & recreation | 2025 |
| Leastone Limited | Wholesale & retail | 2005 |
| Leatherhead Car Sales Limited | Wholesale & retail | 2001 |
| Lecky's Construction Ltd | Construction | 2018 |
| LED by the Wild C.I.C. | Education | 2018 |
| Ledger Associates Limited | Administrative & support | 2015 |
| Lednor Construction Limited | Construction | 2009 |
| LEE & Will Electrical Partners Limited | Construction | 2021 |
| LEE Construction Limited | Construction | 1998 |
| LEE Riley Logistics Ltd | Transport & logistics | 2024 |
| Leee Jeffries Consulting Limited | Information & communication | 2017 |
| Leemark Properties Limited | Real estate | 2020 |
| Leep Media Ltd | Professional & scientific | 2023 |
| Lees Court Films Limited | Other services | 2014 |
| Lees Orient Limited | Hospitality | 2025 |
| Leet Limited | Wholesale & retail | 2003 |
| Leeva Signs & Installation Limited | Professional & scientific | 2012 |