| KMT Properties Ltd | Real estate | 2015 |
| KRI Group Ltd | Financial services | 2021 |
| KTC Property Investments (NW) Ltd | Real estate | 2025 |
| KTJ Rope Access & Inspection Ltd | Wholesale & retail | 2018 |
| Ktny Limited | Wholesale & retail | 2025 |
| KW Publishing Ltd | Information & communication | 2023 |
| Kwerky Ltd | Arts & recreation | 2009 |
| L B INK Limited | Other services | 2024 |
| LA Luna Italian 1 Ltd | Hospitality | 2026 |
| LA Luna Italian Ltd | Hospitality | 2025 |
| LA Petite Mort Theatre | Arts & recreation | 2013 |
| Ladies Gym Wyre Ltd | Arts & recreation | 2022 |
| Laevisattire Ltd | Wholesale & retail | 2026 |
| Laidleys Estates Limited | Households | 2025 |
| Lake District White Water Rafting Ltd | Arts & recreation | 2020 |
| Lakeland Holdings Ltd | Real estate | 2020 |
| Lakes & Fells Property Management Ltd | Hospitality | 2026 |
| Lancashire Waste Management Limited | Water & waste | 2010 |
| Lancashire Waste Recycling (Holdings) Limited | Financial services | 2019 |
| Lancashire Waste Recycling Limited | Water & waste | 2010 |
| Lancs 2 Ltd | Hospitality | 2019 |
| Last Van Standing Ltd | Real estate | 2026 |
| Last Waltz Limited | Arts & recreation | 2016 |
| Latham Estates Limited | Real estate | 2008 |
| Latham Homes Limited | Real estate | 2011 |
| Latham Leisure Limited | Extraterritorial | 2016 |
| Laura H Creative Ltd | Manufacturing | 2023 |
| LD Trade Ltd | Manufacturing | 2020 |
| Leacott Trading Ltd | Wholesale & retail | 2021 |
| Leading-Edge-Integrity Ltd | Professional & scientific | 2025 |
| Ledzakimbo Ltd | Wholesale & retail | 2024 |
| LEE Projects (Crank) Ltd | Administrative & support | 2015 |
| Lemanda Properties Ltd | Real estate | 2026 |
| Lesk Electrical Ltd | Construction | 2024 |
| Lesk Property Management Ltd | Households | 2025 |
| LET ME in Properties Ltd | Real estate | 2024 |
| Little Orchard Caravan Park Ltd | Hospitality | 2026 |
| Little Orchard Enterprises Limited | Extraterritorial | 1997 |
| Little Swifts Childcare Ltd | Health & social care | 2023 |
| Little Treasures (NW) Ltd | Health & social care | 2018 |
| Liver Screening Solutions Ltd | Health & social care | 2026 |
| Liverpool Wholesale Fruit & VEG Market Ltd | Wholesale & retail | 2018 |
| LJS Sports Ltd | Professional & scientific | 2022 |
| LJW Tavern Limited | Hospitality | 2024 |
| LKW Estates Ltd | Real estate | 2020 |
| LL Property Ltd | Households | 2023 |
| Lloyd Accountancy Services Ltd | Professional & scientific | 2024 |
| Louis Meyer Watches Ltd | Wholesale & retail | 2014 |
| Love Media Group Ltd | Professional & scientific | 2024 |
| LOWRIE13 Ltd | Construction | 2025 |
| Loynds Holdings Limited | Financial services | 2018 |
| Loynds International Limited | Wholesale & retail | 1983 |
| Loynds UK Limited | Wholesale & retail | 2017 |
| Luna Bunny Ltd | Wholesale & retail | 2026 |
| Lush Events Ltd | Arts & recreation | 2019 |
| M E GR8 Ltd | Transport & logistics | 2025 |
| M S Ratcliffe Limited | Construction | 2003 |
| M&M Embroidery Ltd | Manufacturing | 2022 |
| Mainline Property Group Limited | Real estate | 2024 |
| Malabar Fashion Ltd | Wholesale & retail | 2017 |
| Malaga Drift Express Ltd | Wholesale & retail | 2016 |
| Malamute Matters Limited | Wholesale & retail | 2014 |
| Mango Digital Media Ltd | Professional & scientific | 2016 |
| Mansource Group UK Ltd | Financial services | 2019 |
| Mansource UK Ltd | Professional & scientific | 2011 |
| Marcella Chocolates Limited | Manufacturing | 2021 |
| Marina Hospitality Limited | Hospitality | 2024 |
| Mark Stockell Heating Ltd | Construction | 2017 |
| Mark W Limited | Transport & logistics | 2019 |
| Mark Wilkinson Construction Services Limited | Construction | 2014 |
| Marmars 1 Ltd | Other services | 2025 |
| Marquis (North-East) Ltd | Real estate | 2019 |
| Martin&Rosie Ltd | Hospitality | 2021 |
| Marton Mayfair Court Limited | Households | 1976 |
| Masons Court (Fleetwood) Limited | Households | 1979 |
| Master Energy Services UK Limited | Financial services | 2023 |
| Mayan Retreats Ltd | Health & social care | 2023 |
| MB Projects NW Ltd | Construction | 2021 |
| Mcgann Boxing Ltd | Wholesale & retail | 2024 |
| Mcmillan Dental Laboratory Ltd | Manufacturing | 2012 |
| Mcwhinney Offshore Logistics Ltd | Mining & quarrying | 2014 |
| MDL Taverns Ltd | Hospitality | 2025 |
| Meadowvue UK Limited | Financial services | 2023 |
| Megbor Limited | Wholesale & retail | 2008 |
| Melges UK Limited | Wholesale & retail | 2023 |
| Meltons Motors Ltd | Wholesale & retail | 2024 |
| Meridiem Holdings Ltd | Real estate | 2022 |
| Merin Takeaway Ltd | Hospitality | 2026 |
| MGS & Sons Ltd | Extraterritorial | 2022 |
| Microtech Software Solutions Ltd | Information & communication | 2022 |
| Midland Fish Company Limited | Wholesale & retail | 2006 |
| Millpine Limited | Hospitality | 2019 |
| Miztech Construction Limited | Construction | 2019 |
| MJN Properties North West Ltd | Professional & scientific | 2009 |
| Mjpa END 2 END Consulting Limited | Professional & scientific | 2025 |
| Montclare Holdings 1 Ltd | Real estate | 2025 |
| Montgomery Transport Limited | | 1984 |
| Moores Homes Construction Ltd | Construction | 2020 |
| Morley Property Services Limited | Real estate | 2003 |
| Mosley & Jarman Ltd | Real estate | 2010 |