| LAND34 Limited | Construction | 2024 |
| Lane & Co Property Ltd | Real estate | 2022 |
| Larebsgotcakes Ltd | Manufacturing | 2024 |
| Larford Estates Limited | Professional & scientific | 1943 |
| Larissa Bridal and Prom Ltd | Wholesale & retail | 2020 |
| Lash Bloom Beauty Ltd | Wholesale & retail | 2021 |
| Lasting Change Holdings Ltd | Financial services | 2025 |
| Lathams Plant Hire, Repairs & Sales Ltd | Administrative & support | 2023 |
| Lawnest Ltd | Professional & scientific | 2024 |
| Lawnswood Property Ltd | Construction | 2023 |
| Lawrence Cleaning Holdings Limited | Financial services | 2025 |
| Lawrence Cleaning Limited | Administrative & support | 1983 |
| Lawton Brooke Solicitors Ltd | Professional & scientific | 2022 |
| Layse Limited | Health & social care | 2014 |
| LBM Autos Ltd | Wholesale & retail | 2019 |
| LBO Property Services Ltd | Real estate | 2026 |
| LBR Property Maintenance Limited | Real estate | 2016 |
| LBW Business Advisory Ltd | Administrative & support | 2025 |
| LBW Holdings and Investments Ltd | Financial services | 2025 |
| LD Peter Ltd | Administrative & support | 2019 |
| LD Propco Limited | Real estate | 2023 |
| LDG Property Rentals Ltd | Real estate | 2025 |
| LDS RGN Limited | Health & social care | 2023 |
| LE RAJ Restaurant (Dudley) Limited | Hospitality | 2016 |
| Lead Recruitment Ltd | Administrative & support | 2025 |
| Leadmagpie Ltd | Administrative & support | 2024 |
| Leaflet Dropper Ltd | Professional & scientific | 2021 |
| Leah Homes Holdings and Investments Ltd | Financial services | 2026 |
| Leah Homes Ltd | Construction | 2026 |
| Learning Journeys Daycare Commercial Holdings Ltd | Real estate | 2023 |
| Learning Journeys Daycare Ltd | Education | 2015 |
| LED First Choice Ltd | Administrative & support | 2015 |
| Ledgerstone Developments Ltd | Construction | 2025 |
| LEE Hughes Limited | Transport & logistics | 2022 |
| LEE Services Limited | Real estate | 2015 |
| Lee-Chang Records Ltd | Information & communication | 2025 |
| Lees Construction Limited | Construction | 2021 |
| Lees Developments Ltd | Construction | 2025 |
| Legacy Holdings and Investments Ltd | Financial services | 2024 |
| Legah Holdings Ltd | Financial services | 2025 |
| Legion Juice Ltd | Wholesale & retail | 2017 |
| Legion Signs Limited | Professional & scientific | 2018 |
| Lennard Stanley Investments Limited | Real estate | 2023 |
| LEO FILMS22 Ltd | Information & communication | 2022 |
| Leo’S Emergency Mobile Tyre Fitting Ltd | Wholesale & retail | 2023 |
| LET IT B Property Limited | Real estate | 2020 |
| LET Sleeping Dogs LIE Ltd | Wholesale & retail | 2025 |
| Let’S Cook Ltd | Hospitality | 2025 |
| Levi Jaheim Brown Limited | Extraterritorial | 2025 |
| Lewis Smith & Co.Limited | Professional & scientific | 2003 |
| Lewis Smith Holdings Limited | Financial services | 2022 |
| Leyland Pharma Limited | Wholesale & retail | 2025 |
| Liamnor Property Limited | Real estate | 2016 |
| Liberate Life Coaching Ltd | Other services | 2025 |
| Libertad-Potts Limited | Health & social care | 2020 |
| Libra Material Handling Limited | Manufacturing | 2010 |
| Life & General (Sedgley) Limited | Financial services | 1994 |
| Life Development Solutions Ltd | Information & communication | 2021 |
| Life Perspective Podcast Ltd | Information & communication | 2026 |
| Light Legal Ltd | Professional & scientific | 2024 |
| Lightningvale Ltd | Administrative & support | 2018 |
| Lillyraven Ltd | Administrative & support | 2020 |
| Lily Healthcare Limited | Health & social care | 2013 |
| Lilypads Daycare Ltd | Health & social care | 2016 |
| Lime Housing Management Ltd | Households | 2021 |
| Limepit Lane Property Management Limited | Households | 2014 |
| Lina Nails Ltd | Other services | 2021 |
| Link 2 Link Courier Services Ltd. | Transport & logistics | 2017 |
| Links Property Management Ltd | Real estate | 2013 |
| Lion Construction (West Bromwich) Limited | Financial services | 2009 |
| Lion Containers (Conversions) Limited | Extraterritorial | 2013 |
| Lion Containers (Fabrications) Limited | Manufacturing | 2013 |
| Lion Containers (Offshore) Limited | Extraterritorial | 2013 |
| Lion Containers Limited | Other services | 2012 |
| Liquid Lettings Limited | Real estate | 2023 |
| Lisen K9 Ltd | Agriculture & fishing | 2020 |
| Lison Products UK Ltd | Manufacturing | 2025 |
| Little Academy Nursery Ltd | Health & social care | 2012 |
| Little and Large Removals Ltd | Transport & logistics | 2025 |
| Little BO Peep Limited | Health & social care | 2007 |
| Little Devils Diner Ltd | Hospitality | 2026 |
| Little Frogs Holdings Limited | Financial services | 2015 |
| Little Hands of Silver Limited | Other services | 2012 |
| Little Ingestre Care Limited | Health & social care | 2013 |
| Little Italy Menswear Limited | Wholesale & retail | 1998 |
| Little Pumpkins Daycare Group Ltd | Health & social care | 2018 |
| Little Pumpkins Daycare Nursery Property Holding Company Limited | Real estate | 2018 |
| Little Pumpkins Holdings Limited | Financial services | 2024 |
| Little Rainbows Childcare Ltd | Health & social care | 2022 |
| Littlemoor Care Home Limited | Health & social care | 2016 |
| Livcare Ltd | Professional & scientific | 2026 |
| Lived Aspirations Ltd | Health & social care | 2024 |
| Livin Large Entertainments Ltd | Extraterritorial | 2008 |
| Livinfootball Ltd | Arts & recreation | 2024 |
| Liwia Shop Ltd | Wholesale & retail | 2025 |
| Liwynmaen Ltd | Construction | 2021 |
| LJ Industrial Roofing Ltd | Construction | 2019 |
| LJH Hospitality Shrewsbury Ltd | Hospitality | 2025 |
| Ljhl Holdings Limited | Real estate | 2026 |
| LJK Lettings Ltd | Real estate | 2026 |