| LAB Nootropics Ltd | Manufacturing | 2023 |
| LAB Racing (UK) Limited | Professional & scientific | 2002 |
| Lacus Ltd | Administrative & support | 2013 |
| Lady Patricia Ltd | Agriculture & fishing | 2012 |
| Laes Studio Ltd | Wholesale & retail | 2024 |
| Laigan Estates Limited | Other services | 2014 |
| Laing Bennett Limited | Real estate | 2009 |
| Lakehurst Developments (Kent) Limited | Construction | 1994 |
| Lakehurst Developments Limited | Construction | 1987 |
| Lakehurst Homes Limited | Construction | 2002 |
| Lakehurst Investments Limited | Construction | 2003 |
| LAN Elecom Limited | Construction | 2014 |
| Lanaway Organisation Ltd | Construction | 2025 |
| Lancaster Drive South Limited | Households | 2012 |
| Lancaster Drive West Limited | Households | 2012 |
| Landau Holdings (Folkestone) Limited | Professional & scientific | 2010 |
| Landwood Estates Limited | Real estate | 2018 |
| Lara Gabrielle Interiors Limited | Other services | 2016 |
| Latota Community Interest Company | Information & communication | 2018 |
| Launderama (Ashford) Ltd | Other services | 2009 |
| Laura NEE Copywriter Limited | Professional & scientific | 2018 |
| Law Property Holdings Ltd | Real estate | 2025 |
| LB Brosis Limited | Hospitality | 2025 |
| LCM (Folkestone) Ltd | Extraterritorial | 2009 |
| LDP Consulting Limited | Real estate | 2016 |
| LDP Electrical Ltd | Construction | 2019 |
| LDT Plumbing & Heating Ltd | Construction | 2023 |
| LE Frog Ltd | Professional & scientific | 2014 |
| Leadingham Projects (UK) Ltd | Administrative & support | 2004 |
| Leadjen Ltd | Professional & scientific | 2025 |
| Lean 6SIGMA Solutions Ltd | Administrative & support | 2012 |
| Learning by Choice Ltd | Health & social care | 2022 |
| Leas House Management Limited | Households | 2011 |
| Leaside Court Management Limited | Real estate | 1997 |
| LEC Gate Automation Kent Ltd | Construction | 2024 |
| Lecon Limited | Wholesale & retail | 2010 |
| Leevon Ltd | Hospitality | 2020 |
| Leeway Construction & Building Services Limited | Construction | 2016 |
| Legacy Collective Ltd | Professional & scientific | 2023 |
| Legal Rescue Consultants Limited | Professional & scientific | 1986 |
| Legion Barbell Ltd | Arts & recreation | 2015 |
| Leigh Construction Ltd | Construction | 2014 |
| Leighton Carpets Limited | Wholesale & retail | 2024 |
| Leisure Republic Limited | Professional & scientific | 2009 |
| Lemon Leaf Limited | Hospitality | 2018 |
| Lemona Limited | Information & communication | 2026 |
| Lemonade Events Ltd | Administrative & support | 2022 |
| Lemurian Properties Ltd | Real estate | 2025 |
| Lennard House Ltd | Hospitality | 2010 |
| LEO Retail Hub Limited | Wholesale & retail | 2024 |
| Let's Amore Ltd | Hospitality | 2023 |
| Levine Limited | Professional & scientific | 2002 |
| Levine Property Development Limited | Real estate | 2006 |
| LEW Bear's Boutique Ltd | Wholesale & retail | 2021 |
| LH Construction & Landscapes Ltd | Construction | 2026 |
| LH Property Block Management Ltd | Real estate | 2020 |
| LHP Groundworks Limited | Construction | 2025 |
| Lianggee Limited | Hospitality | 2026 |
| Libad Collectible Curiosities Ltd | Wholesale & retail | 2024 |
| Liberty Lodge Limited | Health & social care | 2011 |
| Libu Ltd | Information & communication | 1999 |
| Lidie Developments Limited | Construction | 2024 |
| Life Force Trauma Healing Ltd | Health & social care | 2021 |
| Life in Data Ltd | Professional & scientific | 2025 |
| Life News Media Ltd | Information & communication | 2021 |
| Lifetime Renovations Ltd | Construction | 2026 |
| Light and Power Solutions Ltd | Wholesale & retail | 2014 |
| Lighthouse Driving School Ltd | Education | 2020 |
| LIGHTHOUSE43 Ltd | Health & social care | 2020 |
| Limesdale Ltd | Health & social care | 2018 |
| Limeworx Web Development Limited | Information & communication | 2009 |
| Limuni Ltd | Information & communication | 2026 |
| Linch Technology Services Limited | Information & communication | 2023 |
| Line and Loop Ltd | Education | 2025 |
| Linkator Ltd | Information & communication | 2018 |
| Linkory Interactive Limited | Wholesale & retail | 2024 |
| Lions Crest Estates Ltd | Real estate | 2025 |
| Liora Lens Group Ltd | Manufacturing | 2026 |
| Liquid ANT Limited | Information & communication | 2013 |
| Liquid Computing Limited | Information & communication | 2011 |
| Lisdeau Ltd | Professional & scientific | 2024 |
| Little AB Limited | Administrative & support | 2013 |
| Little Bird Estates Limited | Real estate | 2026 |
| Little Helpers (Southeast) Ltd | Administrative & support | 2022 |
| Little Joe's Deli Ltd | Hospitality | 2024 |
| Little Oaks Canterbury Limited | Education | 2012 |
| Little Oaks Capel Limited | Education | 2024 |
| Little Oaks Early Years Limited | Education | 2003 |
| Little Paper Bugs Ltd | Wholesale & retail | 2025 |
| Little Rana Family Investment Ltd | Real estate | 2025 |
| Little Redbrooks Management Company Limited | Households | 2007 |
| Living Words Arts | Arts & recreation | 2013 |
| Livingston Homes Ltd | Real estate | 2013 |
| Ljrautoservices Ltd | Wholesale & retail | 2025 |
| LK Property Professionals Ltd | Real estate | 2024 |
| LKA International Limited | Information & communication | 2016 |
| LLB Brickwork Ltd | Construction | 2023 |
| LLG Property Ltd. | Construction | 2012 |
| Lloyd Adams Barbers Ltd | Other services | 2021 |
| Lloyd Adams Ltd | Other services | 2019 |