| Lavant Education Limited | Agriculture & fishing | 2001 |
| Lavant House Academy Limited | Hospitality | 2017 |
| Lavant House Stables Limited | Agriculture & fishing | 2019 |
| Lavant Legal 24 Limited | Professional & scientific | 2023 |
| Lavant Livery Limited | Agriculture & fishing | 2019 |
| Lavant Riding Limited | Real estate | 2016 |
| Lavant Watch Company Ltd | Manufacturing | 2024 |
| Lavender Events Limited | Wholesale & retail | 2018 |
| Lavender House and Garden Ltd | Wholesale & retail | 2010 |
| Lavish Habitat Limited | Real estate | 2019 |
| Lavventura Consulting Limited | Information & communication | 2014 |
| Law South Group Limited | Other services | 1988 |
| Lawns & Hedges Limited | Extraterritorial | 2015 |
| Lawrance Transport Limited | Transport & logistics | 2008 |
| Lawrence & Layers Interiors Ltd | Professional & scientific | 2025 |
| Lbmd Promotions Ltd | Arts & recreation | 2023 |
| LBP Property Management Ltd | Real estate | 2026 |
| Lbsc Group Ltd | Information & communication | 2024 |
| LC Health Ltd | Professional & scientific | 2026 |
| LC Marine Chichester Limited | Manufacturing | 2023 |
| LC Solutions Limited | Administrative & support | 2017 |
| LCG Assets Ltd | Administrative & support | 2011 |
| LCG Limited | Wholesale & retail | 1980 |
| Lcpg Ltd | Health & social care | 2012 |
| LDN Metal Works Ltd. | Wholesale & retail | 2011 |
| LE Baou D'Enfer Limited | Professional & scientific | 1981 |
| Le&Mo Limited | Real estate | 2022 |
| Leading-Edge Renewables Ltd | Construction | 2026 |
| Leapfrogg Limited | Other services | 2003 |
| Leasemain Property Management Limited | Households | 1994 |
| Leath International Trading Ltd | Wholesale & retail | 2024 |
| Lea’S Photography Ltd | Professional & scientific | 2026 |
| Ledingham Estates Limited | Construction | 2007 |
| LEE J Productions Ltd | Arts & recreation | 2015 |
| LEE Software Solutions Limited | Information & communication | 2015 |
| Lee-Hobson FS Ltd | Other services | 2026 |
| Leemark House (Littlehampton) Limited | Households | 1976 |
| Legado Solutions UK Ltd | Professional & scientific | 2013 |
| Legend Barber Chichester Ltd | Other services | 2023 |
| Leggatts Farm Holdings Ltd | Real estate | 2024 |
| Leigh Skips Limited | Water & waste | 2021 |
| Leisure Dreams Ltd | Professional & scientific | 2006 |
| Leisure Retail Limited | Arts & recreation | 2008 |
| Leivars Limited | Professional & scientific | 2007 |
| Lello Design Limited | Manufacturing | 2009 |
| Lemon Drainage Services Limited | Water & waste | 2015 |
| Lemonade Thinking Limited | Professional & scientific | 2017 |
| Lenam Ltd | Transport & logistics | 2006 |
| Lennon High Performance Boats Limited | Professional & scientific | 2016 |
| Lennox Partners LLP | | 2009 |
| Lennox Renewables Limited | Financial services | 2023 |
| Leon Advisory Limited | Other services | 2006 |
| Let's GET Coffee Ltd | Information & communication | 2016 |
| Letisse Investments Limited | Real estate | 2011 |
| Lewis Brownlee (Chichester) Limited | Professional & scientific | 2013 |
| Lexicona Ltd | Professional & scientific | 2020 |
| Lextego Ltd | Information & communication | 2019 |
| LF Trading Limited | Wholesale & retail | 2025 |
| LG Mobile Autos Limited | Wholesale & retail | 2024 |
| LGA Holdings Limited | Financial services | 2024 |
| LGM Developments Limited | Construction | 2014 |
| LHM 19 Holdings Ltd | Financial services | 2024 |
| Libera | Other services | 2008 |
| Lidier Tech Ltd | Manufacturing | 2024 |
| Life Actuarial Services Limited | Financial services | 2026 |
| Life Centre | Professional & scientific | 2008 |
| Life's a Beach Sussex Ltd | Administrative & support | 2018 |
| Lifeboat Inn (Selsey) Ltd | Hospitality | 2014 |
| Light and Motion Limited | Professional & scientific | 2023 |
| Light UP Burn OUT Candles Limited | Wholesale & retail | 2024 |
| Lighthouse Neurodiversity UK Ltd | Health & social care | 2023 |
| Lili of Chichester Limited | Wholesale & retail | 2013 |
| Lillyhold Limited | Financial services | 2024 |
| Lillyhouse Investments Limited | Financial services | 2022 |
| Lillywhite PUB Group Limited | Hospitality | 2020 |
| Lindfield's Gluten Free Larder Limited | Wholesale & retail | 2026 |
| Lindford 2 Limited | Real estate | 2021 |
| Linknet Telecoms Ltd | Information & communication | 2020 |
| Linkup Support Ltd | Health & social care | 2025 |
| Linn Systems Ltd | Information & communication | 2009 |
| Linzey Associates Ltd | Professional & scientific | 2025 |
| Lion Composite Ltd | Construction | 2018 |
| Lion Place Management Company Limited | Real estate | 1984 |
| Lionheart Business Ltd | Information & communication | 2023 |
| Lisoma International Limited | Manufacturing | 1998 |
| Little Breach Ltd | Real estate | 2022 |
| Little Diggers Montessori Bosham Ltd | Education | 2025 |
| Little Diggers Montessori Group Ltd | Education | 2025 |
| Little Diggers Montessori Limited | Education | 2019 |
| Little Dreamer Sleep Consultant Limited | Other services | 2025 |
| Little Harriers Limited | Education | 2013 |
| Little London Barber Company Ltd | Other services | 2019 |
| Little London Property Limited | Real estate | 2020 |
| Little London Property Trading Company Limited | Real estate | 1973 |
| Little Midhurst Management Limited | Households | 1983 |
| Little Monster TAP Ltd | Hospitality | 2024 |
| Little Olive Digital Ltd | Professional & scientific | 2025 |
| Little Starts Gift Cards Limited | Other services | 2024 |
| Little Willow Property Ltd | Real estate | 2026 |
| Little Wolves Grooming Spa Ltd | Other services | 2022 |