| Lisa Maidment Coaching and Mentoring Limited | Education | 2009 |
| Lisa Roberts Animal Physiotherapy Limited | Professional & scientific | 2022 |
| Lisbon. P.D. Limited | Real estate | 2001 |
| Lithium Lifting Ltd | Construction | 2016 |
| Litten Group Ltd | Financial services | 2023 |
| Litten Services Ltd | Construction | 2021 |
| Little Bay Eatery Company Ltd | Hospitality | 2022 |
| Little BIT Extra Limited | Manufacturing | 2021 |
| Little Coffee Bean @ Active Leisure Limited | Hospitality | 2022 |
| Little Coffee Bean @ Silksworth SKI Limited | Hospitality | 2022 |
| Little Dragon Reptile Supplies Limited | Manufacturing | 2025 |
| Little People Childcare Limited | Health & social care | 2015 |
| Little Pixies Studios Ltd | Professional & scientific | 2024 |
| Little Robin Press Ltd | Information & communication | 2019 |
| Live Forever Limited | Other services | 2023 |
| Live Well Group Limited | Health & social care | 2018 |
| Livents Ltd | Administrative & support | 2017 |
| Livewire Sound and Lighting Ltd | Arts & recreation | 2025 |
| Living Hope Consult Ltd | Hospitality | 2023 |
| LJ Oak Management Ltd | Hospitality | 2026 |
| LJ Property Law Ltd | Professional & scientific | 2024 |
| LJ2 Ltd | Professional & scientific | 2024 |
| LJA Homes Flats Ltd | Real estate | 2023 |
| LJA Homes Ltd | Hospitality | 2021 |
| LJB Utilities Ltd | Construction | 2023 |
| LJC Brickwork Southern Ltd | Construction | 2024 |
| LKD Electrical Limited | Construction | 2022 |
| LKW Space Limited | Information & communication | 2023 |
| LL Donnelly Solutions Ltd | Information & communication | 2024 |
| Llewellynliving Ltd | Real estate | 2024 |
| Lloyds Beal Holdings Ltd | Real estate | 2022 |
| Lloyds Beal Ltd | Professional & scientific | 2005 |
| Lloyds Garage Doors Ltd | Construction | 2023 |
| Lloyds Light Haulage Limited | Transport & logistics | 2010 |
| Lloyds Ships Safety Services Limited | Manufacturing | 2014 |
| Llywelyn Ltd | Wholesale & retail | 2025 |
| LM Electrical Solutions Ltd | Construction | 2023 |
| LM Festivals & Events Limited | Professional & scientific | 2017 |
| LM Transformation Consulting Ltd | Professional & scientific | 2025 |
| LM2 Properties Ltd | Real estate | 2025 |
| LMC Scaffolding Ltd | Construction | 2025 |
| Lmcm Property Ltd | Households | 2020 |
| LMG Digital Limited | Professional & scientific | 2023 |
| LMK Vehicle Service Centre Limited | Wholesale & retail | 2007 |
| LMP Homes Ltd | Real estate | 2026 |
| Loaded Sundaes Ltd | Hospitality | 2024 |
| Lochlyn Torey & Sorcha Limited | Extraterritorial | 2015 |
| Lochlyn Torey Limited | Professional & scientific | 2014 |
| Lock-On Security Limited | Administrative & support | 2013 |
| Lodhi Group of Industries Limited | Wholesale & retail | 2019 |
| Lofthouse Construction Group Ltd | Financial services | 2021 |
| Lofthouse Enterprises Ltd | Construction | 2021 |
| Lofthouse Premier Construction Services Ltd | Construction | 2023 |
| Lofthouse Residences Ltd | Construction | 2018 |
| Logical Cube Limited | Information & communication | 2009 |
| Logistics Solutions & Consulting Ltd | Information & communication | 2025 |
| Lolin Building Services Ltd | Construction | 2026 |
| Loncomposites Ltd | Manufacturing | 2024 |
| London Apartments Limited | Hospitality | 2021 |
| London Gelato (UK) Limited | Wholesale & retail | 2014 |
| London Genetic Centre Limited | Health & social care | 2021 |
| London Oncology and Wellbeing Centre Limited | Health & social care | 2019 |
| London RD Restaurants Ltd | Hospitality | 2018 |
| London Rheumatology Limited | Health & social care | 2009 |
| London Road Express Limited | Hospitality | 2021 |
| London School of Wrestling Limited | Education | 2022 |
| London Service Apartments Limited | Hospitality | 2021 |
| London Smart Systems Limited | Other services | 2016 |
| London Waterproofing Group Limited | Financial services | 2022 |
| Long Time Accountancy Limited | Extraterritorial | 2017 |
| Long Time Lettings Ltd | Real estate | 2025 |
| Longacres Farm Ltd | Financial services | 2023 |
| Longacres Farm Storage Ltd | Construction | 2023 |
| Longlife Window Systems Ltd | Construction | 2021 |
| Longmeadows Landscaping Ltd | Administrative & support | 2019 |
| Longmore Enterprises Limited | Financial services | 2024 |
| Longs of Sherborne Limited | Financial services | 2011 |
| Longview Consultants Ltd. | Professional & scientific | 2016 |
| Longwood Avenue Management Limited | Real estate | 2006 |
| Lonsco Holdings Limited | Financial services | 2024 |
| Look Good, Feel Great, Smell Fantastic Limited | Wholesale & retail | 2020 |
| Loriyo Properties Limited | Real estate | 2025 |
| Lorna J Properties Ltd | Real estate | 2021 |
| Lorna K Aesthetics Ltd | Other services | 2023 |
| Lorraine Lambe Hairdressing Ltd | Other services | 2015 |
| Lost Sorrows Ltd | Wholesale & retail | 2025 |
| Lotties Florist Ltd | Wholesale & retail | 2025 |
| Lotus Waterlooville Limited | Hospitality | 2018 |
| Love Automotive Limited | Wholesale & retail | 2024 |
| Love Basketball Academy Ltd | Education | 2013 |
| Love Dean Spice Ltd | Hospitality | 2024 |
| Love Hair Design Limited | Other services | 2020 |
| LOVE11 Ltd | Professional & scientific | 2021 |
| Lovedean Homecare Limited | Health & social care | 2014 |
| Lovedean Plumbing Limited | Construction | 2017 |
| Lovegood Group Ltd | Construction | 2021 |
| Lovegood Property Ltd | Hospitality | 2022 |
| Lovejoy Properties Ltd | Real estate | 2019 |
| Lovell Construction Services Ltd | Professional & scientific | 2019 |
| Lovitt Digital Limited | Information & communication | 2024 |