| Laville Partners Ltd | Professional & scientific | 2025 |
| Lavin Consultancy Services Ltd | Real estate | 2019 |
| Law Export Truck Sales Limited | Wholesale & retail | 2023 |
| Law Exports Truck Centre Limited | Wholesale & retail | 2019 |
| Law Exports Truck Sales Limited | Wholesale & retail | 2023 |
| Law Plant Centre Limited | Wholesale & retail | 2023 |
| Law Plant Limited | Wholesale & retail | 2023 |
| Law Plant Sales Limited | Wholesale & retail | 2023 |
| Law Truck Centre Ltd | Wholesale & retail | 2007 |
| Law Truck Limited | Wholesale & retail | 2023 |
| Lawless Ventures Limited | Hospitality | 2022 |
| Lawn Care North West Limited | Administrative & support | 2022 |
| Lawnkeeper (East Cheshire) Limited | Administrative & support | 2014 |
| Lawrence Knibbs Partnership Ltd | Health & social care | 2025 |
| Lawton Heating and Plumbing Limited | Construction | 2023 |
| Lawton MD Limited | Health & social care | 2019 |
| LAX Smile Ltd | Health & social care | 2026 |
| Layah Healthcare Limited | Health & social care | 2023 |
| Layer Landscape Architecture Limited | Professional & scientific | 2015 |
| Layer Studio Limited | Professional & scientific | 2023 |
| Lazy Camp Ltd | Hospitality | 2020 |
| Lazy Carpets Limited | Wholesale & retail | 2019 |
| LC Project Solutions Limited | Professional & scientific | 2023 |
| LCR Brands Ltd | Wholesale & retail | 2022 |
| LE Nord Bakery UK Ltd | Manufacturing | 2024 |
| Lead Pulse Network Ltd | Administrative & support | 2024 |
| Leaders in Allergy Care Limited | Health & social care | 2014 |
| Leaders in Heart Rhythm Care LLP | | 2020 |
| Leading EYE Surgeons Ltd | Health & social care | 2021 |
| Leads DO Work Ltd | Information & communication | 2024 |
| Lean Engineering Recruitment Limited | Administrative & support | 2013 |
| LEAP29 Holdings Limited | Professional & scientific | 2013 |
| LEAP29 Limited | Administrative & support | 1999 |
| LEAP29 Services UK Limited | Professional & scientific | 2024 |
| Leasehold Clarity Limited | Information & communication | 2026 |
| Ledco Ltd | Other services | 2025 |
| Ledigo Events Ltd | Other services | 2024 |
| Leeds General Surgery Ltd | Health & social care | 2022 |
| Legacy Concert Company Limited | Administrative & support | 2024 |
| Legacy Kitchens Bathrooms and Conversions Ltd | Construction | 2023 |
| Legal Partner Search Limited | Administrative & support | 2023 |
| Legal Works Recruitment Limited | Administrative & support | 2008 |
| Leicht Kitchen Design Centre North London Limited | Construction | 2019 |
| Leicht Kitchen Design Centre Sevenoaks Limited | Construction | 2020 |
| Leicht Kitchen Design Centre Tunbridge Wells Limited | Construction | 2016 |
| Leigh Nelson Events Limited | Other services | 2008 |
| Lemgare Limited | Health & social care | 2026 |
| Lemon Drop Consultancy Ltd | Professional & scientific | 2018 |
| Lemon Software Limited | Information & communication | 2013 |
| Lemonade Financial Services Ltd | Financial services | 2025 |
| Lemonade Life Cheshire Ltd | Professional & scientific | 2023 |
| LEO Vassiliou Limited | Health & social care | 2019 |
| Lessa Homes Limited | Real estate | 2006 |
| Lets for Life | Real estate | 2014 |
| Levant Properties Limited | Real estate | 2017 |
| Level Communications Limited | Professional & scientific | 2017 |
| Lewis Health Ltd | Health & social care | 2023 |
| Lewis Travis Ltd | Real estate | 2022 |
| Leyana Investments Ltd | Real estate | 2021 |
| LG Anaesthetics Ltd | Health & social care | 2019 |
| LG Project & Programme Management Solutions Ltd | Professional & scientific | 2015 |
| LGC Industries Ltd | Financial services | 2024 |
| LGS Family Limited | Health & social care | 2017 |
| LH BA Limited | Administrative & support | 2013 |
| LH Electrical Southwest Limited | Construction | 2013 |
| LH Personal Training Limited | Other services | 2018 |
| LHB Medical Ltd | Health & social care | 2018 |
| Liaboc Ltd | Real estate | 2016 |
| Liam Enterprises Limited | Information & communication | 2023 |
| Lib-Erty Recycling Solutions Limited | Water & waste | 2024 |
| Liberty Cars Whaley Bridge Ltd | Wholesale & retail | 2019 |
| Liberty Perpetua Limited | Professional & scientific | 2026 |
| Liberty Surgical Limited | Health & social care | 2023 |
| Liew Plastic Surgery Limited | Health & social care | 2019 |
| Life Beyond Limits Limited | Health & social care | 2009 |
| Life IT Limited | Information & communication | 1999 |
| Lift Sports Wear Ltd | Wholesale & retail | 2024 |
| Lightfoots Funeral Services Limited | Other services | 2007 |
| Lights on Invco Ltd | Information & communication | 2020 |
| Lilburn Diagnostic Imaging Ltd | Health & social care | 2024 |
| Lilly Health Limited | Health & social care | 2020 |
| Limbo Solutions Ltd | Professional & scientific | 2024 |
| Limora Ltd | Other services | 2026 |
| Limra 23 Ltd | Real estate | 2023 |
| Linafar Ltd | Wholesale & retail | 2023 |
| Lincoln Road (Wilmslow) Limited | Real estate | 2014 |
| Lincolnshire Properties (Norfolk Street) Limited | Real estate | 1997 |
| Lind Medical Ltd | Health & social care | 2019 |
| Lindon Events Ltd | Administrative & support | 2024 |
| Lindow Lawn Tennis Club Limited | Arts & recreation | 2024 |
| Lindow Ministry Trust | Other services | 2003 |
| Lindow Properties Limited | Real estate | 2025 |
| Lindsay Health Consulting Ltd | Professional & scientific | 2022 |
| Lingua GM C.I.C. | Professional & scientific | 2021 |
| Link GDL Limited | Professional & scientific | 2023 |
| Link Together Ltd | Real estate | 2021 |
| Linklogic Limited | Professional & scientific | 2025 |
| Linnell Design Ltd | Professional & scientific | 2011 |
| Linqinvest Limited | Other services | 2016 |
| Lion ENT Ltd | Health & social care | 2026 |