| Lecote Company Secretarial Limited | Administrative & support | 2021 |
| Lecworx Ltd | Wholesale & retail | 2023 |
| Ledward Property Solutions Ltd | Real estate | 2025 |
| LEE & LIM Limited | Real estate | 2017 |
| LEE Circle Property Ltd | Real estate | 2015 |
| LEE Circle Rentals Ltd | Real estate | 2015 |
| LEE Property Limited | Real estate | 2019 |
| Leeds Limousines Limited | Extraterritorial | 1983 |
| Leehope Services Limited | Extraterritorial | 1975 |
| Left PEG Films Limited | Information & communication | 2024 |
| Left Right Footwear Ltd | Wholesale & retail | 2018 |
| Legal Beat Ltd | Professional & scientific | 2019 |
| Legal Consultant Services UK Ltd | Extraterritorial | 2020 |
| Legal Executive Services UK Ltd | Extraterritorial | 2020 |
| Legato Lessons Limited | Education | 2025 |
| Legend Hair Ltd | Other services | 2024 |
| Legends Ceilings and Partitions Ltd | Construction | 2016 |
| Legends Clinic Ltd | Other services | 2023 |
| Leighton Builders Limited | Construction | 1997 |
| Leisure Accounting and Consultancy Limited | Administrative & support | 2011 |
| LEJ Financial Management Ltd | Professional & scientific | 2021 |
| Lemark Office Equipment Co (North) Limited | Wholesale & retail | 1973 |
| Lenbee Ltd | Real estate | 2022 |
| Lenona Limited | Information & communication | 2012 |
| Leolla Holdings Limited | Financial services | 2020 |
| Leolla Properties Ltd | Real estate | 2021 |
| Lerroc Technical Services Limited | Professional & scientific | 2015 |
| Lesley Walker Consultancy Limited | Professional & scientific | 2018 |
| Lesleys Aesthetics Limited | Other services | 2025 |
| LET IT BE Realestate Ltd | Households | 2025 |
| Let's DO Better C.I.C. | Health & social care | 2021 |
| Let's Talk Training Limited | Professional & scientific | 2004 |
| Lets Recollect Ltd | Wholesale & retail | 2024 |
| Letsell Limited | Real estate | 2016 |
| Level 46 Games Limited | Manufacturing | 2026 |
| Level Company Group Limited | Financial services | 2020 |
| Level Electrical Engineering Limited | Construction | 2009 |
| Level Protection Limited | Construction | 2015 |
| Leverton Funeral Service(Dartford)Limited(The) | Extraterritorial | 1935 |
| Leviathan Brewing Ltd | Manufacturing | 2018 |
| Levon Consulting Limited | Professional & scientific | 2012 |
| Levon Group Holdings Limited | Financial services | 2020 |
| Lexan Solutions Limited | Professional & scientific | 2025 |
| Lexhabitus Limited | Real estate | 2012 |
| Lexicomm Limited | Professional & scientific | 2020 |
| Lexlodge Limited | Real estate | 2017 |
| Lexrae Property Ltd | Real estate | 2024 |
| Leyah Modesty Ltd | Wholesale & retail | 2026 |
| Lfhs RGN Ltd | Health & social care | 2019 |
| LGS Complete Solutions Limited | Professional & scientific | 2016 |
| LH Skin Clinic Ltd | Other services | 2022 |
| LHA Development Limited | Real estate | 2009 |
| LHH Property Ltd | Real estate | 2015 |
| LI House Limited | Hospitality | 2021 |
| LI WOK Limited | Hospitality | 2026 |
| Liamas Ltd | Health & social care | 2006 |
| Liberty Advisors Ltd | Financial services | 2020 |
| Licensed Services Limited | Administrative & support | 2013 |
| Lichfield Coach House Ltd | Real estate | 2024 |
| Lichfield Machine Tools 1990 Limited | Real estate | 1975 |
| Lichfield Road Estates Ltd | Real estate | 2017 |
| Life Group Holdings Ltd | Financial services | 2026 |
| Life Start Training Solutions Ltd | Education | 2025 |
| Life Transforming Fitness CIC | Public administration | 2024 |
| Lifestyle Birmingham Ltd | Real estate | 2016 |
| Lifestyle Builders Ltd | Construction | 2025 |
| Lifestyle Group Holdings Ltd | Financial services | 2020 |
| Lightbulb Comms Ltd | Manufacturing | 2023 |
| LIGHTERU2 Ltd | Health & social care | 2023 |
| Lighthouse Childcare Limited | Education | 2013 |
| Lighthouse HR Consulting Limited | Professional & scientific | 2008 |
| Lilah Aesthetics Limited | Health & social care | 2018 |
| Lilies Funeral Directors (Great Barr) Ltd | Other services | 2020 |
| Lilies Funeral Directors Ltd | Other services | 2015 |
| Lillian Stanley Financial Services Limited | Wholesale & retail | 2019 |
| LIM Medical Ltd | Health & social care | 2017 |
| Limeminds Investments Limited | Real estate | 2018 |
| Limitless Home Care Ltd. | Health & social care | 2017 |
| Limuru Services Limited | Administrative & support | 2025 |
| LIN & Co. Legal Consultancy Limited | Professional & scientific | 2022 |
| Linale (UK) Limited | Manufacturing | 2012 |
| Lindavista Holdings Limited | Financial services | 2019 |
| Lindridge Enterprises Limited | Education | 2012 |
| Lindridge Homes Ltd | Construction | 2025 |
| Lindsay Group Holdings Limited | Financial services | 2019 |
| Lindsay Property Investments Limited | Real estate | 2018 |
| Line Consulting Engineers Limited | Information & communication | 2014 |
| Line Consulting Solutions Limited | Professional & scientific | 2025 |
| Lingfield Grange Management Company Limited | Households | 2000 |
| Linked HR Ltd | Professional & scientific | 2011 |
| Linnecor & Co Limited | Construction | 2005 |
| Linterieur Ltd | Manufacturing | 2022 |
| Lions Muay Thai Ltd | Education | 2025 |
| Liquidlux Ltd | Construction | 2026 |
| Lisel Technical Services Ltd | Wholesale & retail | 2002 |
| LITHIUM3 IT Consulting Limited | Information & communication | 2017 |
| Little Acorns Day Nursery (Burton) Limited | Health & social care | 2014 |
| Little Aston Management Services Limited | Professional & scientific | 1988 |
| Little Aston Pre-School Ltd | Health & social care | 2017 |
| Little Bears Birthdays Limited | Health & social care | 2024 |