| Lomas Brothers Limited | Transport & logistics | 1994 |
| Lombard Shop Ltd | Wholesale & retail | 2025 |
| Lonach Investments Ltd | Administrative & support | 2000 |
| Lonah Limited | Wholesale & retail | 2003 |
| London Archer Ltd | Manufacturing | 2019 |
| London Formations Limited | Extraterritorial | 1999 |
| London Market Shop Ltd | Wholesale & retail | 2023 |
| London Provincial Debt Services Limited | Wholesale & retail | 2023 |
| London Roastery UK Ltd | Manufacturing | 2026 |
| London SEO GUY Ltd | Professional & scientific | 2022 |
| Londonista Limited | Wholesale & retail | 2018 |
| Long Life Handyman Services Limited | Construction | 2024 |
| Long Player Running Ltd | Arts & recreation | 2025 |
| Longespee Management Limited | Households | 2002 |
| Longfield Carpentry Ltd | Manufacturing | 2015 |
| Longham Motor Engineers Limited | Wholesale & retail | 2008 |
| Longview Studio Ltd | Arts & recreation | 2025 |
| Lonsdale House (Bournemouth) Limited | Households | 2008 |
| Look Architecture Limited | Professional & scientific | 2007 |
| Look Promotions UK Ltd | Administrative & support | 2019 |
| Loopecart Ltd | Wholesale & retail | 2026 |
| Loopy-For-Love Ltd | Arts & recreation | 2025 |
| Loraglow Limited | Real estate | 1974 |
| Lorcan Developments Limited | Construction | 2021 |
| Lorde Limited | Extraterritorial | 2019 |
| Lords Properties Management Ltd | Real estate | 2026 |
| Lorekeep Group Limited | Professional & scientific | 2025 |
| Lorena Spataru Ltd | Health & social care | 2018 |
| Lorne Park Mansions Limited | Households | 2006 |
| Lorrimer Conveyancing Limited | Professional & scientific | 2025 |
| LOS Nietos Limited | Hospitality | 2014 |
| Lost Summit Limited | Administrative & support | 2021 |
| Lots of Rice Chinese Takeaway Ltd | Hospitality | 2020 |
| Lotus Spa Ltd | Other services | 2024 |
| Loughran and Sons Limited | Real estate | 2015 |
| Louis and Scott Consultants Ltd | Financial services | 2011 |
| Louisa Wellways Ltd | Professional & scientific | 2024 |
| Louise Harrison Couture Ltd | Wholesale & retail | 2017 |
| Louise TAY Limited | Wholesale & retail | 2025 |
| Love & Light Productions Ltd | Extraterritorial | 2015 |
| Love Camping 2017 Ltd. | Wholesale & retail | 2017 |
| Love My Group Limited | Professional & scientific | 2017 |
| Love My Vibe Tribe Ltd | Health & social care | 2025 |
| Love Puffin Ltd | Other services | 2018 |
| Loveday Social Ltd | Information & communication | 2021 |
| Lovegrove Wellness Ltd | Other services | 2021 |
| Lovell Carpentry & Marine Ltd | Manufacturing | 2024 |
| Lovell&Kotkowski Ltd | Real estate | 2025 |
| Lovelove Communities C.I.C. | Information & communication | 2013 |
| Lovelove Films Ltd | Information & communication | 2010 |
| Lovelove Originals Ltd | Information & communication | 2021 |
| Lovely Jubbly Fabrics Ltd | Wholesale & retail | 2014 |
| Loving Life Retreats Ltd | Education | 2023 |
| LOW Cost Furniture Ltd. | Real estate | 1970 |
| LOW Sulphur Fuels Limited | Mining & quarrying | 2018 |
| Lowey Building Limited | Construction | 2014 |
| Lowkie Ltd | Professional & scientific | 2025 |
| Lowther Road RTM Limited | Households | 2009 |
| LOYALTY365 Ltd | Information & communication | 2025 |
| Lozano Ltd | Real estate | 2018 |
| LP Aspire Estates Ltd | Real estate | 2024 |
| LPM Real Estates Management Ltd | Real estate | 2017 |
| LR Carpentry Ltd | Construction | 2024 |
| LR Hair Ltd | Other services | 2025 |
| LRD Joinery Limited | Construction | 2023 |
| LRK Couriers Ltd | Transport & logistics | 2022 |
| LRL Cafe Ltd | Hospitality | 2024 |
| LRO Electrical Limited | Construction | 2015 |
| Lseara Property Limited | Real estate | 2025 |
| LSG Property Management Ltd | Real estate | 2023 |
| LST Southampton Ltd | Hospitality | 2025 |
| LT Hine Limited | Information & communication | 2016 |
| LT Lifts Ltd | Manufacturing | 2023 |
| LT3B Limited | Professional & scientific | 2025 |
| LTC School of English Bournemouth Ltd | Education | 2024 |
| LTH Construction Ltd | Information & communication | 2018 |
| LTR Motors Limited | Wholesale & retail | 2026 |
| LTS Grieco Ltd | Real estate | 2023 |
| Luana Popa Limited | Health & social care | 2016 |
| Luca's Cafe Limited | Hospitality | 2025 |
| Lucky Day Coffee Shop Ltd | Hospitality | 2026 |
| Lucky Lukas Removals Ltd | Transport & logistics | 2019 |
| Lucky Penny Click Co Ltd | Professional & scientific | 2024 |
| Lucky XIN Ltd | Hospitality | 2025 |
| Lucro Wealth Management Limited | Professional & scientific | 2024 |
| Lucy's Aesthetics Christchurch Limited | Other services | 2022 |
| Ludere Studio Ltd | Professional & scientific | 2024 |
| Ludicrous Lipo Ltd | Wholesale & retail | 2018 |
| Luggar Services Limited | Information & communication | 2026 |
| Luka Homes ( Dawkins Road) Ltd | Construction | 2022 |
| Lukagra Ltd | Real estate | 2023 |
| Lukas Trans Ltd | Transport & logistics | 2020 |
| Lukasz Chajkowski Ltd | Wholesale & retail | 2020 |
| Lukasz Marine Limited | Manufacturing | 2021 |
| Luke Sanderson Web Consultancy Ltd | Information & communication | 2014 |
| Lukes Garden Services Limited | Administrative & support | 2002 |
| Lukes Upholstery and Interiors Limited | Manufacturing | 2020 |
| Lukgarage Ltd | Wholesale & retail | 2023 |
| Lulu & MO Limited | Wholesale & retail | 2024 |
| Lulworth Cove Supplements Ltd | Wholesale & retail | 2025 |