| LSH (Newlands) Limited | Construction | 2023 |
| LSH (Offenham) Limited | Construction | 2026 |
| LSH (Shirley) Limited | Construction | 2025 |
| LSH (Somersham) Limited | Construction | 2022 |
| LSH (Tibberton) Limited | Construction | 2023 |
| LSH (Wythall) Limited | Construction | 2026 |
| LSK Money Ltd | Manufacturing | 2023 |
| LSN Computing Ltd | Information & communication | 2015 |
| LT59 Limited | Professional & scientific | 2023 |
| LTC Plus Limited | Health & social care | 2005 |
| LTK Consultants Limited | Other services | 2007 |
| LTL Consultancy Ltd | Professional & scientific | 2012 |
| LUC Automotive Ltd | Manufacturing | 2017 |
| Lucache Ltd | Financial services | 2025 |
| Lucanco Ltd | Information & communication | 2020 |
| Lucas GAS Turbine Equipment Limited | Professional & scientific | 1907 |
| Lucas NSF Controls Limited | Professional & scientific | 1968 |
| Lucasvarity | Financial services | 1996 |
| Lucent Financial Planning Ltd | Financial services | 2012 |
| Lucentis Consulting Limited | Professional & scientific | 2025 |
| Luchrain Investments Limited | Financial services | 2016 |
| Luchrain Trading Limited | Administrative & support | 2018 |
| Lucidcatalyst Limited | Information & communication | 2016 |
| Lucky Couriers Limited | Transport & logistics | 2025 |
| Lucky ME Company Ltd | Real estate | 2021 |
| Lucky Solutions 2025 Limited | Administrative & support | 2025 |
| Lucky-Tech Limited | Wholesale & retail | 2021 |
| Luckyhousesolihull Limited | Hospitality | 2022 |
| Lucy Martin Productions Ltd | Arts & recreation | 2023 |
| Lucy's Hair and Beauty Boutique Limited | Other services | 2014 |
| Lucy's Mill Limited | Households | 1983 |
| Lukan Griffith Properties Ltd | Real estate | 2025 |
| Lukas Peter Deliveries Limited | Hospitality | 2025 |
| Luke Davies Carpentry & Construction Ltd | Construction | 2014 |
| Luke Draper Heating Ltd | Construction | 2023 |
| Luke Investments Limited | Financial services | 2022 |
| Lukiri Holdings Ltd | Financial services | 2024 |
| Lukiri Investments Ltd | Real estate | 2024 |
| Lumanox Ltd | Construction | 2024 |
| Lumiere Light UP Hire Ltd | Arts & recreation | 2022 |
| Lumina Coaching & Consulting Limited | Education | 2023 |
| Lumina Healthcare Services Ltd | Health & social care | 2025 |
| Luminex V Consulting Limited | Information & communication | 2023 |
| Lumora Wellness Limited | Other services | 2025 |
| Lumos Mirrors Ltd | Wholesale & retail | 2024 |
| Luna Engineering Limited | Construction | 2025 |
| Luna Stays Limited | Real estate | 2024 |
| Lunar ARC Botanicals Ltd | Administrative & support | 2025 |
| Lunchtrucks Limited | Professional & scientific | 1984 |
| Luneco Way Ltd | Other services | 2024 |
| Lurke Street LLP | | 2006 |
| Lusso Contracts Ltd | Construction | 2018 |
| Luventertainment Limited | Other services | 2020 |
| LUX Executive Ltd | Transport & logistics | 2023 |
| LUX Wedding Planner Limited | Other services | 2023 |
| Luxant Living Ltd | Households | 2023 |
| Luxe Division Ltd | Wholesale & retail | 2024 |
| Luxe Hair Design Ltd | Other services | 2015 |
| Luxe Laser LAB Ltd | Other services | 2023 |
| Luxe Remy Limited | Wholesale & retail | 2026 |
| Luxpool Ltd | Construction | 2022 |
| Luxury Airbnb Limited | Real estate | 2019 |
| Luxury Linens (UK) Ltd | Wholesale & retail | 2014 |
| Lvng Solihull Limited | Hospitality | 2022 |
| Lvssa Solutions Ltd. | Information & communication | 2012 |
| LW Liftings Ltd | Construction | 2018 |
| LW Wealth Management Ltd | Financial services | 2012 |
| LWS Consultancy Services Ltd | Professional & scientific | 2020 |
| Lxst Century Ltd | Wholesale & retail | 2023 |
| Lyath Holdings Limited | Financial services | 2023 |
| Lyath Properties Limited | Real estate | 2025 |
| Lyewood Residents Management Company Limited | Households | 2019 |
| Lygocox International Ltd | Real estate | 2022 |
| Lykeable Ltd | Information & communication | 2025 |
| Lyla Lewis Ltd | Other services | 2022 |
| Lymdale Limited | Real estate | 2004 |
| Lymore Investors Limited | Construction | 2017 |
| Lyndon Central Limited | Financial services | 2018 |
| Lyndon Fish Bar Limited | Hospitality | 2020 |
| Lynx Solution Consultants Limited | Information & communication | 2009 |
| LYP Marketing Limited | Professional & scientific | 2024 |
| Lyttelton Gardens Management Company Limited | Households | 2010 |
| Lyttleton Gate Management Company Limited | Real estate | 2025 |
| LZT Homes Limited | Real estate | 2025 |
| L’Atelier Ltd | Other services | 2019 |
| M & B Wines Limited | Wholesale & retail | 2011 |
| M & E G Holdings Limited | Professional & scientific | 2024 |
| M & L Ventures Ltd | Real estate | 2014 |
| M & M Pipeline Limited | Hospitality | 2019 |
| M & M Pipeline Services Ltd | Construction | 2024 |
| M & S Property (Leicester) Limited | Real estate | 2013 |
| M & S Property Lettings Limited | Real estate | 2016 |
| M & S Property Limited | Construction | 2012 |
| M a Support Services (West Midlands) Limited | Hospitality | 2019 |
| M B Exculisves Ltd | Hospitality | 2026 |
| M B System Networks Limited | Information & communication | 2001 |
| M Bhogal Optom Ltd | Health & social care | 2026 |
| M C 333 Ltd | Information & communication | 2024 |
| M C Project Services Ltd | Construction | 2015 |
| M C Residents Co. Ltd | Households | 2016 |