| Komz Global Ltd | Information & communication | 2024 |
| Krinoris Limited | Wholesale & retail | 2025 |
| KS Fibre PM Services Limited | Information & communication | 2024 |
| KSD Housing Limited | Real estate | 2013 |
| Ksd-Air Limited | Transport & logistics | 2025 |
| KT Learning Limited | Professional & scientific | 2013 |
| L & a Devine Hub Limited | Health & social care | 2024 |
| L & R Associates Limited | Real estate | 2010 |
| L T Gaming CIC | Wholesale & retail | 2019 |
| L to P Driving School Ltd | Education | 2022 |
| L&R Brickwork & Construction Limited | Construction | 2014 |
| L. J. Designs Limited | Wholesale & retail | 2000 |
| L7 Academy Limited | Education | 2018 |
| LA Automotive Ltd | Wholesale & retail | 2025 |
| LA Bella Vista Limited | Hospitality | 2022 |
| LA Cucina Woodfired Limited | Hospitality | 2025 |
| LA Marne Court Residents Association Company Limited | Households | 1993 |
| LA Riviere Limited | Agriculture & fishing | 1981 |
| LA14 Properties Ltd | Real estate | 2025 |
| Labtorium Melodrama C.I.C. | Arts & recreation | 2024 |
| Ladle Sussex Ltd | Hospitality | 2019 |
| Lalco Construction (Hastings) Ltd | Construction | 2022 |
| Lamarina Restaurant Ltd | Hospitality | 2025 |
| Land Estates (Hollington) Ltd | Real estate | 2022 |
| Landic Ltd | Professional & scientific | 2018 |
| Lanon IT Services Limited | Information & communication | 2026 |
| Larrysmartart Ltd | Wholesale & retail | 2016 |
| Latest Scene Limited | Real estate | 2025 |
| Laurawat Limited | Information & communication | 2011 |
| Law Connect Limited | Professional & scientific | 2017 |
| Lawn Lads Ltd | Administrative & support | 2024 |
| LAY Back Climbing Limited | Arts & recreation | 2021 |
| Lazy Lobster Stays Ltd | Hospitality | 2026 |
| Lbwm Limited | Financial services | 2016 |
| Lcele Limited | Real estate | 2023 |
| LCM Property Limited | Real estate | 2020 |
| LE Bonzz Hairdesign Limited | Other services | 2019 |
| LE Kamri Ltd | Wholesale & retail | 2021 |
| Leadership in Passenger Transport Awards Limited | Professional & scientific | 2012 |
| Lealands Park Limited | Real estate | 2021 |
| Learn. Achieve. Succeed Ltd | Education | 2026 |
| Learnfinance Ltd | Information & communication | 2024 |
| Learnsure Education Ltd | Education | 2022 |
| Leddra Family Limited | Other services | 2010 |
| Leddra Farms LLP | | 2011 |
| LEE Amusements Limited | Arts & recreation | 1990 |
| Legends Assets Partnership Limited | Real estate | 2016 |
| Leisure & Learning (Hastings) Limited | Administrative & support | 2019 |
| Leisurestart Limited | | 1989 |
| Lemonchase Assets LLP | | 2016 |
| Lemonchase Limited | Wholesale & retail | 2005 |
| Lenny Merch Limited | Wholesale & retail | 2025 |
| Leonora Crawley Ltd | Administrative & support | 2011 |
| Leons Gate Ltd | Transport & logistics | 2019 |
| Level Industries Ltd | Extraterritorial | 2011 |
| LEVEL-3 Productions C.I.C. | Information & communication | 2000 |
| Lexicom Ltd | Real estate | 2022 |
| Lexicom Technology Ltd | Wholesale & retail | 2005 |
| LIA Toby Limited | Professional & scientific | 2011 |
| Liam Atkins Limited | Information & communication | 2015 |
| Lidrona Ltd | Wholesale & retail | 2025 |
| Life Movies Ltd | Information & communication | 2021 |
| Life Technology Ltd | Information & communication | 2017 |
| Life-Work Psychotherapy Ltd | Health & social care | 2015 |
| Lifelift Consultancy Ltd | Health & social care | 2019 |
| Lifesize CIC | Arts & recreation | 2019 |
| Lifestyle Health Therapy Limited | Health & social care | 2022 |
| Lifetime Trustees Ltd | Professional & scientific | 2000 |
| LIGHTHOUSE284 Ltd | Hospitality | 2025 |
| Lighting Force Limited | Wholesale & retail | 2001 |
| Lillyun Ltd | Other services | 2025 |
| Linton Court Limited | Households | 2004 |
| Lions Gate Food Limited | Hospitality | 2026 |
| Little Big Dog Ltd | Real estate | 2021 |
| Little Butterfly Organic Ltd | Wholesale & retail | 2012 |
| Little Concepts Distribution Ltd. | Wholesale & retail | 2015 |
| Little Treasures Vintage Limited | Wholesale & retail | 2012 |
| Livcoast Ltd | Extraterritorial | 2023 |
| Living Record Productions Ltd | Arts & recreation | 2016 |
| Living Rents (Hastings) Limited | Real estate | 2015 |
| LJ Fletcher Builders Limited | Construction | 2010 |
| LL 1066 Holdings Limited | Financial services | 2022 |
| Loading Talent Limited | Information & communication | 2016 |
| Lobster and Swan Ltd | Wholesale & retail | 2015 |
| Localcolour Social Risk Management Ltd | Professional & scientific | 2012 |
| Lockhart & Hastings Limited | Professional & scientific | 2011 |
| Logoflow Ltd | Information & communication | 2020 |
| London Audio Post Ltd | Information & communication | 2015 |
| London Property Management Rentals Ltd | Real estate | 2019 |
| Lone Goat Limited | Information & communication | 2013 |
| Looking Glass Lodge Limited | Hospitality | 2021 |
| Lore of Shangri-La Limited | Arts & recreation | 2017 |
| Lotus Search Ltd | Administrative & support | 2019 |
| Loubarnrecovery Ltd | Transport & logistics | 2025 |
| Love Hastings Limited | Other services | 2017 |
| Lovefx Limited | Hospitality | 2011 |
| LOW Tide Ltd | Professional & scientific | 2025 |
| Lowrie Design Limited | Professional & scientific | 2011 |
| LSP Conexus Ltd | Information & communication | 2024 |
| LUA Creative Ltd | Professional & scientific | 2019 |