| Lakeside Products Limited | Administrative & support | 2010 |
| Lakeside Services Ltd | Professional & scientific | 2025 |
| Lakeview Property Solutions Limited | Real estate | 2016 |
| Lambournes(B'Ham)Limited | Real estate | 1932 |
| Lamp-Post Associates Limited | Administrative & support | 2019 |
| Lamplighter Digital Ltd | Information & communication | 2025 |
| Land & Property Investments (1961) Limited | Real estate | 1961 |
| Landapp Limited | Extraterritorial | 2012 |
| Landcomorg Ltd | Construction | 2023 |
| Landlord Web Ltd | Other services | 2015 |
| Landscaping & Driveways Birmingham Ltd | Administrative & support | 2019 |
| Langford Bhogal Ltd | Professional & scientific | 2021 |
| Langford Fields Residents Management Company Limited | Households | 2018 |
| Langham Commercial Properties Limited | Administrative & support | 2017 |
| Langham Walsh Limited | Professional & scientific | 2011 |
| Langland Fitness Limited | Arts & recreation | 2014 |
| Language Boutique Ltd | Professional & scientific | 2017 |
| Language Innovation Ltd | Education | 2024 |
| Lansdowne Assets Limited | Real estate | 2017 |
| Lansdowne Corporate Holdings Ltd | Real estate | 2017 |
| Lansdowne Group Limited | Real estate | 2016 |
| Lansdowne Property Developers Limited | Real estate | 2017 |
| Lantern House (Olton) Ltd | Hospitality | 2022 |
| Lanyon 1620 Limited | Construction | 2004 |
| Lanyon Consulting Limited | Professional & scientific | 2013 |
| Laptab Holdings Ltd | Financial services | 2020 |
| Laptops and Phones Repair Centre Ltd | Other services | 2022 |
| Lapworth Consultants Ltd | Professional & scientific | 2008 |
| Lapworth Developments Ltd | Construction | 2026 |
| Lapworth Lettings Developments Limited | Real estate | 2021 |
| Lapworth Lettings Limited | Real estate | 2024 |
| Lapworth Scarecrow Festival | Administrative & support | 2011 |
| Large Bars Limited | Hospitality | 2002 |
| Larma Group Limited | Administrative & support | 2024 |
| Lasan Group Management Limited | Professional & scientific | 2018 |
| Lasan Restaurant Limited | Hospitality | 2001 |
| Laser Enterprise Ltd | Manufacturing | 2025 |
| Laserline Contracts Limited | Manufacturing | 2014 |
| Lasit Laser UK Ltd | Manufacturing | 2023 |
| Last Chance Deals Ltd | Wholesale & retail | 2025 |
| Late Night YEW Tree Limited | Wholesale & retail | 2014 |
| Latham Industries (West Midlands) Limited | Manufacturing | 2025 |
| Laumann Group UK Limited | Financial services | 2006 |
| Launchchange Holding Company | Financial services | 1996 |
| Launchchange Instrumentation Limited | Professional & scientific | 1988 |
| Launchchange Limited | Professional & scientific | 1991 |
| Launchchange Operations Limited | Professional & scientific | 2009 |
| Launchchange UK Holdco Limited | Financial services | 2021 |
| Laundry Drop Ltd | Professional & scientific | 2026 |
| Laura O'Neill Medical Aesthetics Ltd | Health & social care | 2023 |
| Laura Wedgeworth Ltd | Professional & scientific | 2021 |
| Laurel Pension Trustee Company Limited | Financial services | 2008 |
| Lava Cars Limited | Wholesale & retail | 2025 |
| Lavang Shirley Limited | Hospitality | 2024 |
| Lavish Real Estates Ltd | Real estate | 2025 |
| Law Without a Lawyer (Franchises) Limited | Other services | 2012 |
| Lawd Business Solutions Ltd | Professional & scientific | 2019 |
| Lawn Homes Ltd | Real estate | 2024 |
| Lawrence Family Holdings Ltd | Financial services | 2020 |
| Lawson Tech Services Limited | Professional & scientific | 2025 |
| Lawsports Limited | Professional & scientific | 2003 |
| Lawsync Bidco Limited | Other services | 2025 |
| Lawyerapp Limited | Information & communication | 2026 |
| Laybury Property Management Ltd | Real estate | 2018 |
| Layden Creations Ltd | Hospitality | 2024 |
| Layertec Systems Ltd | Information & communication | 2013 |
| Layker Limited | Administrative & support | 2018 |
| Layton-Small Holdings Ltd | Real estate | 2024 |
| Lazy Fish Ltd | Real estate | 2017 |
| Lazy Lizard Securities Limited | Real estate | 1996 |
| Lazy PIG Events Ltd | Hospitality | 2022 |
| LB Bespoke Services Ltd | Administrative & support | 2024 |
| LB Electrical Installations Ltd | Construction | 2017 |
| LB Supply Co Ltd | Wholesale & retail | 2024 |
| LBG Network Installations Ltd | Construction | 2023 |
| LBL Properties Limited | Real estate | 2017 |
| Lbms Consultancy Ltd | Professional & scientific | 2025 |
| LC Estates Group Ltd | Real estate | 2023 |
| LCA Reeves Consultancy Limited | Professional & scientific | 2022 |
| LCL Group Limited | Professional & scientific | 2013 |
| LD Aesthetics Ltd | Other services | 2018 |
| LD IT Solutions Ltd | Information & communication | 2025 |
| LDB Advisory Limited | Professional & scientific | 2022 |
| LDH Medical Limited | Health & social care | 2013 |
| LDH Property Ltd | Real estate | 2021 |
| Ldheard Limited | Financial services | 2020 |
| LDM Homes Ltd | Real estate | 2022 |
| LDM Property Investments Limited | Real estate | 2015 |
| LDP Services Ltd | Professional & scientific | 2012 |
| Ldsy Engineering Limited | Wholesale & retail | 2014 |
| LE Host Limited | Hospitality | 2014 |
| LE Nails & Spa (264) Ltd | Other services | 2018 |
| LE Petit LE20 Ltd | Hospitality | 2019 |
| LE Van Limited | Professional & scientific | 2018 |
| Leach Surveyors Limited | Other services | 2021 |
| Leader Auto Electrics Limited | Wholesale & retail | 2013 |
| Leader Chuck Systems Limited | Wholesale & retail | 1991 |
| Leading Results Limited | Administrative & support | 2011 |
| Leaf Property Holdings Limited | Financial services | 2023 |
| Leafhopper Enterprise Support Limited | Information & communication | 2005 |