| Lesk Engineering Group Limited | Professional & scientific | 2005 |
| Lesk Engineers Limited | Manufacturing | 1965 |
| Leslie George & Co. Limited | Wholesale & retail | 2009 |
| Let's Feed Brum Limited | Health & social care | 2017 |
| Letivo Gleam Ltd | Administrative & support | 2026 |
| Letivo Limited | Households | 2026 |
| Lets Kollab Ltd | Professional & scientific | 2021 |
| Letting & Property Management Ltd | Hospitality | 2022 |
| Leukaemia Care | Health & social care | 2019 |
| Leukaemia Care Trading Limited | Health & social care | 2022 |
| Level-Heads Crewing Limited | Professional & scientific | 2015 |
| Leveldisc Systems Limited | Information & communication | 1996 |
| Leviathan Systems Ltd | Administrative & support | 2020 |
| Lewis Air Conditioning (2001) Limited | Construction | 2009 |
| Lewis Light Haulage Ltd | Transport & logistics | 2021 |
| Lewis Storage Solutions Ltd | Transport & logistics | 2022 |
| Lewis' GAS & HOP Supplies Limited | Agriculture & fishing | 2019 |
| LF Urology Ltd | Health & social care | 2024 |
| LFT Electrical Ltd | Construction | 2021 |
| Lftd Enterprises Ltd | Arts & recreation | 2023 |
| LFW Windows Limited | Construction | 2007 |
| LG Accounts and Consulting Ltd | Professional & scientific | 2020 |
| LG Complete Building Services Ltd | Construction | 2025 |
| LGH Agencies Limited | Wholesale & retail | 2008 |
| LGL Balanced Equine Nutrition Ltd | Manufacturing | 2021 |
| LGT Trans Limited | Transport & logistics | 2019 |
| LH2 Solutions Ltd | Construction | 2025 |
| LHF Building Management Services Limited | Construction | 2022 |
| LHJ Holding UK Limited | Financial services | 2015 |
| LHP Trading Ltd | Manufacturing | 2021 |
| Liam and SAM Ltd | Hospitality | 2024 |
| Licenced Consultancy Limited | Hospitality | 2016 |
| Lickey Builders Ltd | Construction | 2007 |
| Light-Technique Limited | Wholesale & retail | 2014 |
| Lighthill Risk Network Limited | Information & communication | 2017 |
| Lighthouse Consultants Limited | Professional & scientific | 2023 |
| Lighthouse Family Centre Community Interest Company | Health & social care | 2024 |
| Lights OUT Production Ltd | Manufacturing | 2015 |
| Lightstone Media Ltd | Information & communication | 2019 |
| Lightup Families Ltd | Education | 2024 |
| LIL Munch Bakery Ltd | Wholesale & retail | 2025 |
| Lilla Stugan Camping Limited | Hospitality | 2014 |
| Lilly PAD Limited | Construction | 2006 |
| Lima Zulu Services Limited | Manufacturing | 2017 |
| Limatech Services Limited | Information & communication | 2025 |
| Limelite People Group Ltd | Administrative & support | 2020 |
| Limitless Scaffolding Services Ltd | Construction | 2020 |
| Limitless Talent Limited | Manufacturing | 2001 |
| Lincetter Lodges Ltd | Hospitality | 2022 |
| Linco Engineers Limited | Professional & scientific | 2008 |
| Lincolnshire Developments Limited | Real estate | 2003 |
| Lincs Haulage Limited | Other services | 2026 |
| Linden Corporate Finance Limited | Professional & scientific | 2017 |
| Linden Homes (Worcester) Limited | Real estate | 1986 |
| Linden Works Ltd | Professional & scientific | 2024 |
| Line Side Development Limited | Manufacturing | 2025 |
| Linge Holdings Limited | Financial services | 2016 |
| Link Design UK Ltd | Professional & scientific | 2020 |
| Linked Consults Ltd | Professional & scientific | 2025 |
| Linked Risk Management Systems Limited | Construction | 2008 |
| Linksector Residents Management Limited | Real estate | 1988 |
| Linkstreamservices Ltd | Professional & scientific | 2016 |
| Linley Green Ltd | Wholesale & retail | 2025 |
| Lintott Property Limited | Real estate | 2015 |
| Linxos Limited | Professional & scientific | 2011 |
| Lioncourt Homes (Binley Woods) LLP | | 2009 |
| Lioncourt Homes (Development NO. 12) Limited | Construction | 2010 |
| Lioncourt Homes (Development NO. 13) Limited | Construction | 2010 |
| Lioncourt Homes (Development NO. 2) Limited | Construction | 2006 |
| Lioncourt Homes (Development NO. 3) Limited | Construction | 2006 |
| Lioncourt Homes (Development NO. 5) Limited | Construction | 2007 |
| Lioncourt Homes (Development NO.1) Limited | Construction | 2006 |
| Lioncourt Homes (Development NO.10) Limited | Construction | 2010 |
| Lioncourt Homes (Development NO.14) Limited | Construction | 2010 |
| Lioncourt Homes (Development NO.16) Limited | Construction | 2013 |
| Lioncourt Homes (Development NO.17) Limited | Construction | 2015 |
| Lioncourt Homes (Development NO.7) Limited | Construction | 2009 |
| Lioncourt Homes (Development NO.8) Limited | Construction | 2009 |
| Lioncourt Homes (Development NO.9) Limited | Construction | 2009 |
| Lioncourt Homes (Development) Limited | Construction | 2006 |
| Lioncourt Homes (Honeybourne) LLP | | 2010 |
| Lioncourt Homes Holdings Limited | Construction | 2021 |
| Lioncourt Homes Limited | Construction | 2006 |
| Lioncourt Strategic Land (Sharpness) Limited | Construction | 2018 |
| Lioncourt Strategic Land Limited | Construction | 2009 |
| Lione Ltd | Information & communication | 2005 |
| Lions Constrction Limited | Construction | 2026 |
| Lisa Jackson Limited | Wholesale & retail | 2015 |
| Lisa Watkins Limited | Other services | 2012 |
| Listely UK Ltd | Information & communication | 2025 |
| LIT Effect Limited | Financial services | 2024 |
| Little Daydream's Play Cafe Ltd | Education | 2024 |
| Little Fledglings Hallow Ltd | Education | 2026 |
| Little Guests Ltd. | Other services | 2004 |
| Little House. of Hair Limited | Other services | 2018 |
| Little Marrakesh Limited | Hospitality | 2025 |
| Little Marrakesh Property Holdings Limited | Financial services | 2025 |
| Little Munchkin Patch Childcare Limited | Education | 2013 |
| Little Treasures Limited | Education | 2000 |
| LIV13 Ltd | Construction | 2024 |