| Longton Investments Ltd | Real estate | 2019 |
| Longton Vehicle Solutions Ltd | Transport & logistics | 2025 |
| Lorcom Properties Limited | Real estate | 2015 |
| Lord Joinery & Construction Ltd | Construction | 2025 |
| Lorraine Miranda HR Business Consultant Limited | Administrative & support | 2019 |
| Lostock Legal Solicitors Ltd | Professional & scientific | 2024 |
| Louise Mcerlain Nutrition Consultancy Ltd | Other services | 2021 |
| Louise Walsh Limited | Professional & scientific | 2008 |
| Love Steel Group Limited | Manufacturing | 2021 |
| Love Vintage Diamonds.Com Limited | Wholesale & retail | 2013 |
| LOVE2LEARN Limited | Education | 2024 |
| Lowdham Salon Limited | Other services | 2006 |
| Lowe Boyd Residential Ltd | Households | 2024 |
| Lowe Residential Limited | Real estate | 2021 |
| Loxtec Limited | Administrative & support | 2026 |
| Lpdh Ltd | Administrative & support | 2023 |
| LPE Holdings Limited | Administrative & support | 2017 |
| LPP Aesthetics Limited | Other services | 2025 |
| Lprice Rigging Ltd | Construction | 2011 |
| LPZ Properites Ltd | Real estate | 2020 |
| LRB Law Limited | Professional & scientific | 2024 |
| LRJ Transport Services Limited | Transport & logistics | 2014 |
| LRL Construction Ltd | Construction | 2013 |
| LS Carpentry Solutions Ltd | Construction | 2017 |
| LS Fencing Services Limited | Construction | 2025 |
| LS Property Management Ltd | Administrative & support | 2017 |
| LS Success Ltd | Professional & scientific | 2025 |
| LSH Care Services Limited | Health & social care | 2025 |
| Lsuk Developments (Glendale) Limited | Construction | 2021 |
| LTC & DTC Limited | Administrative & support | 2004 |
| Luca MED Limited | Health & social care | 2018 |
| Luca T Port Ltd | Transport & logistics | 2022 |
| Lucania Associates Limited | Professional & scientific | 2016 |
| Lucas Auto Bodies Limited | Manufacturing | 2024 |
| Lucas Green Barn Limited | Construction | 2019 |
| Lucid Dreaming Ltd | Information & communication | 2019 |
| Lucky 8S Rock and Blues Bar Limited | Hospitality | 2017 |
| Luid Ltd | Real estate | 2018 |
| Lukasz Kondrat Transport Ltd. | Administrative & support | 2014 |
| Lumen Psychology Limited | Administrative & support | 2025 |
| Lumen Sense Ltd | Education | 2026 |
| Lumlee Ltd | Real estate | 2016 |
| Luna Deli Ltd | Hospitality | 2018 |
| Luna Glitz Ltd | Wholesale & retail | 2019 |
| Luneside Care Holdings Limited | Health & social care | 2024 |
| Luscious Lingerie Ltd | Wholesale & retail | 2020 |
| Luwukya Enterprise Limited | Health & social care | 2020 |
| LUX OCC Medical Ltd | Health & social care | 2018 |
| Luxe Property Solutions Ltd | Households | 2023 |
| Luxeaura Network Ltd | Professional & scientific | 2026 |
| Luxlite LED Solutions Limited | Wholesale & retail | 2018 |
| Luxlite Limited | Wholesale & retail | 2013 |
| Luxury Landscaping Direct Ltd | Administrative & support | 2022 |
| Luxury Rattan Ltd | Wholesale & retail | 2024 |
| LV Care Staffing Ltd | Administrative & support | 2026 |
| LW Electrical NW Ltd | Construction | 2025 |
| LW Event Group Limited | Administrative & support | 2018 |
| Lwequine Ltd | Wholesale & retail | 2020 |
| Lydiate Farm (Eccleston) Management Company Limited | Households | 2022 |
| Lymedosc Consulting Ltd | Professional & scientific | 2025 |
| Lynch Land and Development Ltd | Professional & scientific | 2018 |
| Lynchelle Ltd | Hospitality | 2023 |
| Lyndhurst Developments (Northwest) Limited | Administrative & support | 2019 |
| Lyndhurst MSR Holdings Limited | Financial services | 2025 |
| Lyndhurst Precision Engineering Limited | Manufacturing | 1990 |
| Lyndhurst Property Rentals Limited | Real estate | 2024 |
| Lyon Griffiths (Financial Services) Limited | Financial services | 2016 |
| Lyons Energy Supply Limited | Energy | 2025 |
| M & B Garages Limited | Wholesale & retail | 2018 |
| M & B Lift Services Ltd | Manufacturing | 2012 |
| M & D People Consulting Ltd | Administrative & support | 2022 |
| M & E Thompson Limited | Transport & logistics | 2002 |
| M & F Plumbing and Heating Contractors Limited | Construction | 2002 |
| M & G Construction Services Limited | Construction | 2003 |
| M & J Freelance Ltd | Transport & logistics | 2011 |
| M & M Environmental Consultancy Ltd | Professional & scientific | 2016 |
| M & P Meats Ltd | Financial services | 2023 |
| M & R Car Sales Ltd | Wholesale & retail | 2020 |
| M & R Motor Services Ltd | Wholesale & retail | 2020 |
| M & S Marketing Ltd | Wholesale & retail | 2011 |
| M a Brickworks Ltd | Construction | 2011 |
| M a Training Solutions Ltd | Education | 2014 |
| M C G Grooming Ltd | Other services | 2024 |
| M Dale Services Ltd | Construction | 2024 |
| M Dalley Property Services Limited | Real estate | 2024 |
| M Dalley Services Limited | Real estate | 2021 |
| M F Payne Limited | Construction | 2003 |
| M G Thornton Inns Ltd | Hospitality | 2025 |
| M Gani and Sons Limited | Wholesale & retail | 2024 |
| M I Fabrication GB Limited | Construction | 2012 |
| M J Driver Hire Ltd | Transport & logistics | 2019 |
| M J N Joinery and Building Services Ltd | Manufacturing | 2021 |
| M Lynch Landscapes Ltd | Construction | 2017 |
| M Miles Consulting Ltd | Information & communication | 2019 |
| M P Maintenance Ltd | Construction | 2026 |
| M Pennington Ltd | Construction | 2003 |
| M Riding Builders Ltd | Construction | 2023 |
| M Spedition Ltd | Transport & logistics | 2026 |
| M Taylor & SON Ltd | Construction | 2014 |
| M Wilson Property Ltd | Real estate | 2019 |