| LCB Horizon Group Ltd | Transport & logistics | 2024 |
| LD Wireless Ltd | Information & communication | 2021 |
| LE Gala Property Limited | Real estate | 2024 |
| Lead Funnel Blueprint Ltd | Information & communication | 2020 |
| Leadership Learning Ltd | Professional & scientific | 2021 |
| Leaf Films Ltd | Information & communication | 2014 |
| Leaf Futures Ltd | Construction | 2021 |
| Leamington Hosakakwai Ltd | Arts & recreation | 2025 |
| Leanne Thomas Nails Ltd | Other services | 2025 |
| Learn to Swim Limited | Education | 2020 |
| Lectaurus Electrical Ltd | Construction | 2023 |
| LEE a Construction Ltd | Construction | 2021 |
| LEE Barton Consultancy Limited | Professional & scientific | 2019 |
| LEE Porter Carpets Limited | Construction | 2009 |
| Lee-Moore Construction Ltd | Construction | 2021 |
| Leedham Property Holdings Ltd | Real estate | 2023 |
| Lees Windows Ltd | Construction | 2025 |
| LES Lilas Properties Limited | Construction | 1992 |
| Leswyn Limited | Real estate | 2016 |
| Lettings & Management Ltd | Real estate | 2019 |
| Let’S Connect WM C.I.C. | Health & social care | 2024 |
| LEV Systems Ltd | Construction | 2022 |
| Level Line Construction Ltd | Administrative & support | 2019 |
| Levell Hygiene Care Limited | Health & social care | 2026 |
| Levels Bricklayers & Construction Limited | Construction | 2025 |
| LEVELUP7 Solutions Ltd | Information & communication | 2026 |
| Lewis Pipework Solutions Ltd | Construction | 2020 |
| Lewismyattdesignstudio Limited | Professional & scientific | 2025 |
| Lexa Loft Ltd | Wholesale & retail | 2021 |
| Lexi Estates Limited | Real estate | 2026 |
| Lexnis Payroll Services Ltd | Professional & scientific | 2023 |
| Leyfields Fire & Security Ltd | Administrative & support | 2025 |
| LG Autos Ltd | Wholesale & retail | 2014 |
| LG Luxury Limited | Wholesale & retail | 2023 |
| LGE Rowe Services Ltd | Professional & scientific | 2020 |
| LGM Motor Sales Ltd | Wholesale & retail | 2023 |
| LH & AA Properties LLP | | 2014 |
| LH Tech Trims Ltd | Manufacturing | 2017 |
| LHL Consultants Ltd | Professional & scientific | 2026 |
| Liaisons UK Ltd | Manufacturing | 2003 |
| Liam's Touch Limited | Wholesale & retail | 2022 |
| Liberty Healthcare Solutions Limited | Health & social care | 2008 |
| Lichfield Chiropractic Clinic Limited | Professional & scientific | 2010 |
| Lichfield Garden Buildings Ltd | Wholesale & retail | 2023 |
| Lichfield Street Barbers Limited | Other services | 2014 |
| Lichfield Street Motor Company Ltd | Wholesale & retail | 2014 |
| Life & Soul Collective Ltd | Administrative & support | 2021 |
| Life Quality Bathing Ltd | Construction | 2021 |
| Lifestyle Conversions & Developments Limited | Construction | 2007 |
| Lifestyle Conversions Management Ltd | Construction | 2014 |
| Lift Your Limits Ltd | Health & social care | 2025 |
| Light UP Creative Ltd | Information & communication | 2018 |
| Lika Cleaning Ltd | Other services | 2026 |
| Likethevideofilms Limited | Information & communication | 2016 |
| Lilbitofeverything Ltd | Wholesale & retail | 2025 |
| Liliann Styled by Ryan Ltd | Wholesale & retail | 2021 |
| Lillie PUB Co Limited | Hospitality | 2024 |
| Lillis Properties Limited | Real estate | 2020 |
| Lilly PAD Leisure Limited | Hospitality | 2026 |
| Lilly Rose Ltd | Real estate | 2022 |
| Lily Housing Ltd | Real estate | 2025 |
| Lily Nails Limited | Wholesale & retail | 2015 |
| Lime Box Limited | Administrative & support | 2012 |
| Lime Taxis Ltd | Transport & logistics | 2017 |
| Lincoln Estate Planning Solutions Ltd | Professional & scientific | 2019 |
| Linford Motorsport Limited | Manufacturing | 2018 |
| Link Tyres Limited | Extraterritorial | 2018 |
| Linkedleads Limited | Administrative & support | 2020 |
| Linkster Accountant Limited | Professional & scientific | 2025 |
| Lisa Allen Ltd | Professional & scientific | 2022 |
| Lisa Baughen Consultancy Limited | Professional & scientific | 2019 |
| Lisa J Taylor BIA Ltd | Health & social care | 2025 |
| Lisa M Stretton Limited | Professional & scientific | 2019 |
| Little Acorns (Drayton Bassett) Limited | Health & social care | 2004 |
| Little Berties Ltd | Extraterritorial | 2022 |
| Little Gems Vintage Tea Room Ltd | Hospitality | 2025 |
| Little Oaks Pre-School Tamworth Ltd | Health & social care | 2025 |
| Little Olive Branch Ltd | Wholesale & retail | 2022 |
| Little Stars Childcare Tamworth Limited | Health & social care | 2025 |
| Little Western Enterprises Ltd | Manufacturing | 2026 |
| Live Sparks Media Ltd | Construction | 2024 |
| Lively Solutions Limited | Construction | 2025 |
| Liver GAL Medical Services Ltd | Health & social care | 2021 |
| Livi London(Wm) Ltd | Administrative & support | 2022 |
| Living Linked Ltd | Health & social care | 2024 |
| Liviu Chiscop Spedition Ltd | Transport & logistics | 2014 |
| LIZ Heath Marketing Limited | Professional & scientific | 2005 |
| Ljays Cakery Ltd | Manufacturing | 2024 |
| LJC Ventures Ltd | Real estate | 2025 |
| LK Borthwick Ltd | Professional & scientific | 2024 |
| LKQ Group (UK) Limited | Wholesale & retail | 1992 |
| LKW Trading Ltd | Administrative & support | 2015 |
| LL Interior & Staging Limited | Professional & scientific | 2024 |
| LL Property Solutions Ltd | Real estate | 2024 |
| LLA Rail Ltd | Construction | 2017 |
| Lloyd Winter Limited | Wholesale & retail | 2015 |
| LLR Facilities Management Limited | Real estate | 2026 |
| LMS Boutique Ltd | Wholesale & retail | 2022 |
| LMS Test Ltd | Professional & scientific | 2025 |
| Load 4U Ltd | Transport & logistics | 2025 |