| L D S Technology Limited | Information & communication | 1989 |
| L K Interiors & Carpentry Limited | Manufacturing | 2025 |
| L M Intuitive Ltd | Education | 2017 |
| L V Scaffolding Ltd | Construction | 2018 |
| L&C Digital Delivery Ltd | Information & communication | 2024 |
| L.C.G. Properties Limited | Real estate | 1996 |
| L2 Business Events Limited | Administrative & support | 2006 |
| LA Bling Boutique Limited | Wholesale & retail | 2020 |
| LA Boirie Limited | Professional & scientific | 2018 |
| LA Lean Consulting Ltd | Professional & scientific | 2026 |
| LA Lounge Hair and Beauty Limited | Other services | 2024 |
| LA Nautica (Mudeford) Company Limited | Households | 2005 |
| Labetts Limited | Wholesale & retail | 2015 |
| Labouchardiere Family Holdings Ltd | Financial services | 2024 |
| Lady Clean Ltd | Other services | 2008 |
| Laing Securities Limited | Real estate | 2013 |
| Lakeland IT Limited | Administrative & support | 2021 |
| Lama Productions Ltd | Arts & recreation | 2024 |
| Lambar Limited | Wholesale & retail | 1990 |
| Lambda Analytics Ltd | Information & communication | 2021 |
| Lambert Company Investments Ltd | Financial services | 2025 |
| Lamform Ltd. | Manufacturing | 2003 |
| Laminin Digital Ltd | Information & communication | 2020 |
| Lanben Limited | Financial services | 2017 |
| Land and Sea (Exmouth) Limited | Hospitality | 2024 |
| Land and Sea (Harbour Shed) Limited | Hospitality | 2023 |
| Land and Sea (Holdings) Limited | Wholesale & retail | 2024 |
| Land and Sea (Investments) Ltd | Financial services | 2025 |
| Land and Sea (Topsham) Limited | Hospitality | 2024 |
| Land Products (Holdings) Ltd | Financial services | 2026 |
| Land Products (Wessex) Limited | Construction | 1991 |
| Land to Sea Ltd | Professional & scientific | 2021 |
| Landing Gear and Systems Solutions Limited | Professional & scientific | 2022 |
| Landrich Solutions Limited | Professional & scientific | 2013 |
| Langano Consulting Ltd | Information & communication | 2024 |
| Langland Conservation Ltd | Information & communication | 2020 |
| Langley Corporate Solutions Ltd. | Financial services | 2007 |
| Langrove Publishing Ltd | Information & communication | 2024 |
| Langton Building Services Limited | Construction | 2008 |
| Lansdowne Cottage Limited | Real estate | 2018 |
| Lartech Limited | Information & communication | 2013 |
| Late Tuesday Night Productions Limited | Administrative & support | 1992 |
| Laura Holmes Limited | Other services | 2012 |
| Lauren Francis Bridal Ltd | Wholesale & retail | 2022 |
| Lauren Management Company Limited | Households | 1994 |
| Lauren Mason Ltd | Manufacturing | 2022 |
| Laurie Greenland Racing Limited | Arts & recreation | 2018 |
| Lava Software Ltd | Information & communication | 2019 |
| Lawrence Edward Management Ltd | Information & communication | 2026 |
| Laybourne Finance Ltd | Financial services | 2013 |
| Laybourne Holdings Ltd | Financial services | 2018 |
| LB Contracting Ltd | Information & communication | 2017 |
| LBH Fencing and Landscaping Ltd | Administrative & support | 2021 |
| LC Marketing Services Limited | Professional & scientific | 2023 |
| LCB Legal Ltd | Professional & scientific | 2019 |
| LDC Renewables Limited | Construction | 2015 |
| LE Mesurier Holdings Ltd | Financial services | 2026 |
| LE Taux Limited | Information & communication | 2025 |
| LEA Court Freehold Limited | Households | 2018 |
| Lead Energy Infra Partners Ltd | Professional & scientific | 2019 |
| Lead Windows Limited | Manufacturing | 2021 |
| Leadcore Consulting Ltd | Professional & scientific | 2025 |
| Leader Belting Limited | Wholesale & retail | 2005 |
| Leading Edge Communications Ltd | Professional & scientific | 2010 |
| Leads of the Future Ltd | Information & communication | 2020 |
| Leadstal Limited | Public administration | 2022 |
| Leagate Properties Limited | Real estate | 1962 |
| Lean Together Ltd | Information & communication | 2015 |
| Learnpilot Limited | Professional & scientific | 2024 |
| Leave NO Prints Ltd | Extraterritorial | 2021 |
| Leclair Solutions Ltd | Professional & scientific | 2015 |
| Lectern Court Limited | Households | 2020 |
| Ledeed and Besley Limited | Professional & scientific | 2025 |
| LEE Godbold Limited | Wholesale & retail | 2008 |
| Lee-Well Catering Ltd. | Hospitality | 1995 |
| Leed Property Management Limited | Real estate | 2000 |
| Legacy Trail Ltd | Information & communication | 2025 |
| Legal Eagle Wills Ltd | Professional & scientific | 2014 |
| Leggacy Holdings Ltd | Real estate | 2025 |
| Leigh LEN Belle Ltd | Hospitality | 2022 |
| Leigh Mews Management Company Limited | Households | 2012 |
| Lekanmedia Limited | Professional & scientific | 2013 |
| Lema Investments Limited | Real estate | 2023 |
| Lemar Systems Ltd | Information & communication | 2021 |
| Lemma Limited | Professional & scientific | 2022 |
| Lemma Properties Limited | Real estate | 2024 |
| Lemon Street Property Investments Ltd | Real estate | 2022 |
| Leoma Consulting Services Limited | Information & communication | 2020 |
| LES Blanches Vineries (UK) Limited | Agriculture & fishing | 2003 |
| Lester Brunt Wealth Management Ltd | Professional & scientific | 2017 |
| Leticia Ciofani Design Limited | Professional & scientific | 2024 |
| Lets Ltd | Professional & scientific | 2007 |
| Letter X Limited | Wholesale & retail | 1999 |
| Lettfolio Ltd | Information & communication | 2026 |
| Lewens Limited | Extraterritorial | 2007 |
| Lewis & Smith Properties Limited | Real estate | 2025 |
| Lewis Concrete Limited | Manufacturing | 2018 |
| Lewis Goode Properties Limited | Real estate | 2017 |
| Lewis Trott Design Ltd | Professional & scientific | 2011 |
| Lewis Wyatt (Construction) Limited | Construction | 1990 |