| Love Shopping Direct Ltd | Wholesale & retail | 2008 |
| Love Steel Holdings Limited | Financial services | 2023 |
| Love Your Smile Ltd | Health & social care | 2024 |
| Lovely Cakes Ltd | Hospitality | 2025 |
| Lovely Sweets Ltd | Hospitality | 2024 |
| Lovendu Ltd | Wholesale & retail | 2020 |
| Lover Girl Productions Ltd | Arts & recreation | 2026 |
| LOW Wheel UK Ltd | Other services | 2017 |
| Lowercase Investments Limited | Real estate | 2023 |
| Loyalgrove Limited | Manufacturing | 1991 |
| LOZ Distribution Ltd | Hospitality | 2022 |
| Lozannex Consultancy Limited | Wholesale & retail | 2013 |
| LP SD Eighty Five Limited | Wholesale & retail | 2023 |
| LP SD Ninety Nine Limited | Wholesale & retail | 2023 |
| LP SD One Hundred SIX Limited | Wholesale & retail | 2023 |
| LP SD Thirty Seven Limited | Wholesale & retail | 2023 |
| LPF Clubs CIC | Professional & scientific | 2024 |
| LPR Security Installations Limited | Administrative & support | 2024 |
| Lpyr Ltd | Wholesale & retail | 2026 |
| LRK Flooring Ltd | Construction | 2022 |
| LRM Pubs Ltd | Hospitality | 2026 |
| Lrsx Limited | Construction | 2019 |
| LS Insurance Solutions Ltd. | Financial services | 2023 |
| Lsjc Engineering Services Limited | Construction | 2012 |
| LSK Assest Ltd | Real estate | 2025 |
| LSN Events Ltd | Hospitality | 2025 |
| LSS Associates Ltd | Administrative & support | 2019 |
| Luca Andrew Ltd | Transport & logistics | 2022 |
| Luca Christos Limited | Real estate | 2013 |
| Lucalink Transport Limited | Transport & logistics | 2025 |
| Lucania Care Limited | Health & social care | 2024 |
| Lucas Antics Limited | Arts & recreation | 2022 |
| Lucas Ruth Leather Goods Limited | Wholesale & retail | 2024 |
| Luckway Inter Ltd | Wholesale & retail | 2025 |
| Lucky Group Limited | Hospitality | 2021 |
| Lucky New WOK Limited | Hospitality | 2023 |
| Luckytwin Consultancy Ltd | Administrative & support | 2019 |
| Luctec Ltd | Wholesale & retail | 2022 |
| Lukasz Padzinski Ltd | Other services | 2018 |
| Luke Carrington Properties Ltd | Real estate | 2017 |
| Luke Elite Auto Care UK Ltd | Wholesale & retail | 2018 |
| Luke Kelly Cladding Ltd | Construction | 2024 |
| Luke Staton Limited | Other services | 2017 |
| Luki Motors Ltd | Wholesale & retail | 2022 |
| Lukia Group Ltd | Administrative & support | 2019 |
| Lula ANN Bridal Limited | Wholesale & retail | 2016 |
| Lulu Entertainment and Promotion Services Limited | Hospitality | 2025 |
| Luma Accountants Ltd | Professional & scientific | 2019 |
| Lumic Tail Lifts Ltd | Wholesale & retail | 2024 |
| Lumincarts Ltd | Wholesale & retail | 2025 |
| Lumisen Ltd | Real estate | 2026 |
| Luna Luxury Limited | Wholesale & retail | 2025 |
| Lunar Gardens Management Limited | Households | 2025 |
| Lunnaré Ltd | Wholesale & retail | 2025 |
| Lupascu Ltd | Transport & logistics | 2026 |
| Lussuoso Properties Ltd | Households | 2024 |
| Lustal Ltd | Wholesale & retail | 2020 |
| Luvcarers Ltd | Health & social care | 2023 |
| Luvgym Limited | Arts & recreation | 2013 |
| LUX Homeware UK Ltd | Wholesale & retail | 2022 |
| LUX Lemons Ltd | Wholesale & retail | 2026 |
| LUX Structures Ltd | Construction | 2020 |
| Luxboro Logistics LLP | | 2012 |
| Luxbuild Ltd | Construction | 2015 |
| Luxe Hairdressing Limited | Wholesale & retail | 2016 |
| Luxe Vault Limited | Wholesale & retail | 2023 |
| Luxoraa UK Ltd | Wholesale & retail | 2026 |
| Luxultra Lighting Limited | Manufacturing | 2019 |
| Luxury Line Motorhomes Ltd | Administrative & support | 2024 |
| Luxury London Events Ltd | Administrative & support | 2024 |
| Luxury Nails Aldridge Ltd | Other services | 2026 |
| LUXURYNAILS1 Ltd | Other services | 2025 |
| LV Nails Walsall Ltd | Other services | 2025 |
| Lvlv Events Ltd | Hospitality | 2008 |
| Lvlv Team Solutions Ltd | Real estate | 2015 |
| LW Property Management Limited | Real estate | 2019 |
| Lwsc Ltd | Health & social care | 2023 |
| LX Automotive Ltd | Wholesale & retail | 2020 |
| LX Computers Ltd | Manufacturing | 2019 |
| LXR Ltd | Real estate | 2021 |
| Lyallpuri & Sons Ltd | Transport & logistics | 2022 |
| Lyees General Cleaning Ltd | Administrative & support | 2024 |
| Lyndbourne Access Limited | Manufacturing | 1994 |
| Lysw Co. Ltd | Wholesale & retail | 2025 |
| Lywyu Transportation Ltd | Transport & logistics | 2024 |
| M & a Luxe Creations Ltd | Wholesale & retail | 2025 |
| M & BG Group Limited | Administrative & support | 2011 |
| M & BG Limited | Construction | 2011 |
| M & C Motorcycles Ltd | Wholesale & retail | 2018 |
| M & C Recovery Limited | Wholesale & retail | 2026 |
| M & K Commercials Ltd | Wholesale & retail | 2022 |
| M & K RAJ Souvlaki Foods Limited | Manufacturing | 2024 |
| M & L D Installations Limited | Manufacturing | 2016 |
| M & M Estate Letting Ltd | Real estate | 2024 |
| M & R Medical Solutions Limited | Health & social care | 2010 |
| M & S Energy Solutions Ltd | Other services | 2020 |
| M & S Solutions West Midlands Limited | Real estate | 2016 |
| M & SJ Bagshaw Ltd | Manufacturing | 2009 |
| M & T Supermarket Limited | Wholesale & retail | 2009 |
| M a Car Group Limited | Administrative & support | 2016 |