| Luckwell Developments Limited | Real estate | 2012 |
| Luckwell Road Management Company Limited | Households | 1981 |
| Lucky 4 Music Limited | Professional & scientific | 2000 |
| Lucky Abode Limited | Real estate | 2024 |
| Lucky Chancer Limited | Manufacturing | 2022 |
| Lucky Chef 2023 Ltd | Hospitality | 2023 |
| Lucky China Ltd | Hospitality | 2024 |
| Lucky House Digital Ltd | Information & communication | 2020 |
| Lucky House Management Ltd | Administrative & support | 2020 |
| Lucky Key Limited | Wholesale & retail | 2021 |
| Lucky LN. Limited | Real estate | 2016 |
| Lucky ME Productions Ltd | Information & communication | 2026 |
| Lucky Saint Films Limited | Information & communication | 2018 |
| Lucky Stuff Productions Limited | Arts & recreation | 2007 |
| Lucky US Ltd | Wholesale & retail | 2025 |
| Lucky Winners Competition Ltd | Wholesale & retail | 2022 |
| Lucuna Ltd | Information & communication | 2025 |
| Lucy Ellen Hill Coaching Ltd | Other services | 2019 |
| Lucy Grewar Associates Limited | Administrative & support | 2016 |
| Lucy Sanderson Ltd | Professional & scientific | 2020 |
| Lucy Webber Dermatology Ltd | Health & social care | 2025 |
| Lucy White Planning Limited | Professional & scientific | 2017 |
| Lucy-Locket Home Care Limited | Health & social care | 2023 |
| Luda Investment Limited | Real estate | 2023 |
| Ludan Hills Holdings Limited | Wholesale & retail | 2020 |
| Ludicrous Lengths Ltd | Other services | 2019 |
| Ludinc Limited | Information & communication | 2018 |
| Ludwell Developments Ltd | Real estate | 2020 |
| Ludwell Properties Ltd | Real estate | 2016 |
| Lueurs Advisory Ltd | Professional & scientific | 2024 |
| Luffman Construction Limited | Construction | 2026 |
| Lugat Enterprises Limited | Health & social care | 2019 |
| Lugbury Escapes Limited | Hospitality | 2014 |
| Luggage World and Repair Centre UK Limited | Wholesale & retail | 2012 |
| LUI1960 Ltd | Wholesale & retail | 2025 |
| Luidelivery Limited | Transport & logistics | 2025 |
| Luin Investments Limited | Financial services | 2018 |
| LUK Delivery Ltd | Transport & logistics | 2020 |
| Luk-Mar Trans Ltd | Transport & logistics | 2018 |
| Luka Holdings Ltd | Other services | 2023 |
| Luka Plumbing Ltd | Construction | 2025 |
| Lukasz Szejka Studio Ltd | Other services | 2019 |
| Luke Allen Animation Ltd | Arts & recreation | 2021 |
| Luke Anthony Consulting Ltd | Professional & scientific | 2025 |
| Luke Build and Design Ltd | Financial services | 2023 |
| Luke J Hawthorne Ltd | Construction | 2016 |
| Luke Jerram Limited | Administrative & support | 2008 |
| Luke Lloyd Ltd | Construction | 2016 |
| Luke S Build and Design Ltd | Construction | 2018 |
| LUKEBM1 Limited | Real estate | 2017 |
| Lukefrsh Limited | Information & communication | 2022 |
| Luken Ltd | Households | 2022 |
| Lukesland Leisure Limited | Hospitality | 2017 |
| Lukins Technical & Design Limited | Professional & scientific | 2011 |
| Lukoll Care Limited | Wholesale & retail | 2016 |
| Lukonic Limited | Manufacturing | 2016 |
| Lulalex Limited | Wholesale & retail | 2024 |
| Lullington Court Farm Limited | Agriculture & fishing | 2015 |
| Lulsgate Quarry Company Limited | Mining & quarrying | 1984 |
| Luma Brand and Marketing Consultancy Ltd | Professional & scientific | 2022 |
| Luma Health Holdings Ltd | Real estate | 2025 |
| Lumanova Ltd | Wholesale & retail | 2025 |
| Lumavir Ltd | Wholesale & retail | 2026 |
| Lumberland Ltd | Wholesale & retail | 2016 |
| Lume Studio Bristol Ltd | Professional & scientific | 2025 |
| Lumefade International Ltd | Wholesale & retail | 2025 |
| Lumen IO Ltd | Information & communication | 2026 |
| Lumen Properties Limited | Real estate | 2025 |
| Lumenate Growth Ltd | Manufacturing | 2019 |
| Lumendi International Limited | Manufacturing | 2018 |
| Lumendi Limited | Manufacturing | 2014 |
| Lumenely Ltd | Information & communication | 2025 |
| Lumens Systems Ltd | Information & communication | 2026 |
| Lumenstream Finance Ltd | Administrative & support | 2017 |
| Lumeos Lighting Ltd | Manufacturing | 2024 |
| Lumera Holdings Ltd | Financial services | 2026 |
| Lumes Media Limited | Professional & scientific | 2018 |
| Lumetrics Ltd | Manufacturing | 2025 |
| Lumex Hair Art Limited | Other services | 2023 |
| Lumia Couriers Ltd | Transport & logistics | 2019 |
| Lumia Transport Ltd | Transport & logistics | 2014 |
| Lumin Sports Installations Ltd | Construction | 2021 |
| Lumina Periodontics Ltd | Health & social care | 2026 |
| Luminahq Ltd | Professional & scientific | 2026 |
| Luminance Marketing Ltd | Professional & scientific | 2025 |
| Luminary Candles Ltd | Wholesale & retail | 2023 |
| Luminasoft UK Ltd | Information & communication | 2016 |
| Lumisafe Ltd | Wholesale & retail | 2012 |
| Lumisoft Ltd | Professional & scientific | 2021 |
| Lumiton Limited | Health & social care | 2016 |
| Lumo Liquids Ltd | Manufacturing | 2014 |
| Lumoptica Limited | Professional & scientific | 2015 |
| Lumora and Pearl Ltd | Wholesale & retail | 2026 |
| Lumos Healthcare Ltd | Health & social care | 2022 |
| Lumpy Film Services Limited | Information & communication | 2015 |
| Lumsden Prop Co Limited | Real estate | 2024 |
| Lumziizi Limited | Wholesale & retail | 2026 |
| Luna 9 Design Ltd | Arts & recreation | 2018 |
| Luna BLU Ltd | Professional & scientific | 2021 |
| Luna Domes Limited | Hospitality | 2019 |