| Lookers TPS Limited | Administrative & support | 2007 |
| Looks AG Limited | Health & social care | 2000 |
| Loom'N'Line Interiors Ltd | Professional & scientific | 2025 |
| Loop Fibre Services Ltd | Information & communication | 2022 |
| Loose Mango Limited | Professional & scientific | 2019 |
| Loqdin Ltd | Wholesale & retail | 2026 |
| Lord's Care Recruit Limited | Administrative & support | 2018 |
| Lord-Fox Estates Limited | Real estate | 2025 |
| Lore Trans Ltd | Transport & logistics | 2018 |
| Loreforge Limited | Wholesale & retail | 2026 |
| Lorenz Estates Ltd | Real estate | 2026 |
| Lost INK Ltd | Other services | 2024 |
| Lott 3 Limited | Professional & scientific | 2022 |
| Lottiem Ltd | Other services | 2014 |
| Lotus Kitchen Stoke Ltd | Hospitality | 2024 |
| Lou-D-Lou's Ltd | Other services | 2023 |
| Loughton Independent Assessments Ltd | Health & social care | 2014 |
| Louis Holdings Ltd | Real estate | 2020 |
| Louisa Blake Limited | Professional & scientific | 2022 |
| Louise Butler Beauty Ltd | Other services | 2025 |
| Louise Parks Consultancy Limited | Professional & scientific | 2021 |
| Love Stoke Church | Other services | 2008 |
| Love-Davies Properties Limited | Real estate | 2017 |
| Loved Logs Ltd | Wholesale & retail | 2023 |
| Loveit.Global Ltd | Information & communication | 2024 |
| Lovelocks Luxury Hair Extensions Limited | Other services | 2018 |
| LOW Carbon Dynamics Ltd | Professional & scientific | 2023 |
| LOW Cost Mobiles Ltd | Wholesale & retail | 2011 |
| LOW Cost Plumbing & Heating Ltd | Construction | 2023 |
| Lowe Mortgages & Protection Limited | Financial services | 2018 |
| Lowe Voltage Ltd | Construction | 2024 |
| Lower ASH Convenience Store Ltd | Wholesale & retail | 2022 |
| Lower ASH Minimart Ltd | Wholesale & retail | 2023 |
| Lower Barton Farm Limited | Agriculture & fishing | 2004 |
| Lower Mill Properties Limited | Construction | 1964 |
| Lowe’S Lets Ltd | Real estate | 2025 |
| Lowsale Ltd | Wholesale & retail | 2026 |
| Loxley Holdings Limited | Financial services | 2015 |
| Loyal PAK Construction Limited | Manufacturing | 2025 |
| LP Driveway Specialist Limited | Administrative & support | 2025 |
| LPC Compliance Limited | Transport & logistics | 2024 |
| LPG Holdings Ltd | Financial services | 2024 |
| LR Birkdale Development Limited | Construction | 2025 |
| LRB Cafe Bar Ltd. | Wholesale & retail | 2014 |
| LRD Assets Ltd | Financial services | 2019 |
| LRH Property Developments Limited | Real estate | 2025 |
| LS Costa Ltd | Wholesale & retail | 2026 |
| LS Prime Homes Ltd | Construction | 2026 |
| LS Property Solutions Ltd | Real estate | 2026 |
| LS Stock Limited | Hospitality | 2020 |
| Lsab Electrical Services Limited | Construction | 2015 |
| LSM Assets Limited | Real estate | 2025 |
| LSM Gassama Ltd | Other services | 2012 |
| LSM Tutoring Ltd | Education | 2025 |
| LSW Properties Ltd | Real estate | 2022 |
| LTW Bespoke Properties Ltd | Real estate | 2024 |
| LTW Care Limited | Health & social care | 2019 |
| Lucent Software Ltd | Information & communication | 2026 |
| Lucestella Milano Ltd | Wholesale & retail | 2025 |
| Lucia Fashion Ltd | Wholesale & retail | 2024 |
| Lucian Driving Services Limited | Transport & logistics | 2019 |
| Luck Trader Ltd | Wholesale & retail | 2010 |
| Luckeee ME Ltd | Administrative & support | 2026 |
| Lucking Nourished Ltd | Health & social care | 2025 |
| Lucky Seven Private Hire Ltd | Transport & logistics | 2022 |
| Lucky Sevens Embroidery Limited | Manufacturing | 2003 |
| Lucky Tkcnn Ltd | Hospitality | 2023 |
| Luckylads Ltd | Arts & recreation | 2025 |
| Luco Medical Limited | Health & social care | 2019 |
| Lucy Griffiths Foundation Ltd | Real estate | 2004 |
| Luda (Wigan) Ltd | Construction | 2024 |
| Luda Developments Ltd | Real estate | 2025 |
| Luda Holdings Ltd | Real estate | 2024 |
| Luda Property Group Ltd | Real estate | 2023 |
| Lufem Solutions Ltd | Information & communication | 2025 |
| Lukasz.Piotrowicz Limited | Transport & logistics | 2026 |
| Lumar Healthcare Solutions Ltd | Health & social care | 2024 |
| Lumar Home Care Services Ltd | Health & social care | 2026 |
| Lumiere Holdings & Rentals Ltd | Real estate | 2024 |
| Lumina Elegance Limited | Wholesale & retail | 2024 |
| Luminary Living Ltd | Households | 2023 |
| Lummo Limited | Financial services | 2018 |
| Lumo Media Limited | Arts & recreation | 2014 |
| Lunar Restaurants Group Ltd | Hospitality | 2021 |
| Lunar Rhodes Music Limited | Information & communication | 2025 |
| Lunora Group Limited | Administrative & support | 2026 |
| Lunvex Ltd | Wholesale & retail | 2026 |
| Luoski Limited | Administrative & support | 2023 |
| Luosko Centre of Excellence Ltd | Education | 2025 |
| Lupul Retail Limited | Wholesale & retail | 2025 |
| Lurline Property Ltd | Real estate | 2018 |
| Lurline Services Ltd | Administrative & support | 2019 |
| Lush Convenience Stores Limited | Wholesale & retail | 2018 |
| Lusso Prior Limited | Transport & logistics | 2023 |
| Lutumailagi Ltd | Professional & scientific | 2018 |
| Luvium Property Investments Ltd | Real estate | 2026 |
| LUX AESTHETICS4 Ltd. | Other services | 2025 |
| LUX Car Valeting Centre Ltd | Wholesale & retail | 2023 |
| LUX Line Chauffeurs 24/7 Ltd | Transport & logistics | 2025 |
| Luxe Nails Academy Ltd | Education | 2026 |