| MUG Life Crisis Ltd | Hospitality | 2025 |
| Muhammad Muzamil Ltd | Wholesale & retail | 2025 |
| Muhtar 73 Limited | Hospitality | 2022 |
| Mulberry Community Projects (Blackpool) | Health & social care | 2007 |
| Multi Resolutions Ltd | Wholesale & retail | 2025 |
| Multi-Ply Components Limited | Manufacturing | 1998 |
| Multinet Limited | Information & communication | 2024 |
| Multistream Programming Ltd | Information & communication | 2015 |
| Mumentum Solutions UK Ltd | Wholesale & retail | 2025 |
| Munchkin Creative Limited | Wholesale & retail | 2010 |
| Mundi Asset Management Ltd | Real estate | 2011 |
| Mural Crown Holdings Limited | Real estate | 2024 |
| Murdock Services Ltd | Wholesale & retail | 2025 |
| Musashi Consulting Ltd | Information & communication | 2007 |
| Mustafa Associates & Builders Ltd | Construction | 2025 |
| Mutualmart Limited | Households | 1991 |
| MV Joinery Ltd | Construction | 2023 |
| MVS Auto Repair Shop Ltd | Wholesale & retail | 2024 |
| MW Digimedia Limited | Professional & scientific | 2015 |
| Mwanga Mental Health Assessment Hub Limited | Health & social care | 2026 |
| Mwanga Transitions Blackpool and Lancashire Ltd | Health & social care | 2026 |
| MWC Consultants Limited | Administrative & support | 2017 |
| MWC Electrical Services Ltd | Construction | 2012 |
| My Danvers Properties Ltd | Real estate | 2024 |
| My Feet World Ltd | Professional & scientific | 2023 |
| My HR Consultancy Ltd | Extraterritorial | 2016 |
| My People People Limited | Administrative & support | 2013 |
| My People Team Limited | Professional & scientific | 2015 |
| My Plumbing Heating Ltd | Construction | 2017 |
| My Travel Money Limited | Professional & scientific | 2023 |
| Mybusiness Consultancy Limited | Professional & scientific | 2016 |
| Myebook Global Limited | Information & communication | 2014 |
| Myidapparel Ltd | Wholesale & retail | 2021 |
| Mylaptopshop.Com Ltd | Information & communication | 2014 |
| Mylawns Artificial Grass Ltd | Administrative & support | 2020 |
| Mypda Limited | Information & communication | 2019 |
| Myra Yachting Ltd | Extraterritorial | 2024 |
| Myrtle Lynch Ltd | Wholesale & retail | 2025 |
| Mythop Leisure Club Limited | Arts & recreation | 1988 |
| Mythop Village Management Company Limited | Households | 1988 |
| Myton Grange Management Company Limited | Households | 1990 |
| Myvedik Group Ltd | Information & communication | 2021 |
| MZ IT Ltd | Transport & logistics | 2017 |
| MZK Chicken Ltd | Wholesale & retail | 2016 |
| N & L Total Clean Ltd | Administrative & support | 2026 |
| N D Car Sales Limited | Wholesale & retail | 2024 |
| N S Childs Management Services Limited | Administrative & support | 2018 |
| N Treasure Design Ltd | Information & communication | 2018 |
| N W Car Parks Limited | Transport & logistics | 2011 |
| N W R Thompson Limited | Arts & recreation | 2008 |
| N Yorke Consultancy Ltd | Information & communication | 2021 |
| N&G Services Ltd | Real estate | 2025 |
| N&R Jointing Ltd | Construction | 2023 |
| N.A. Robson Limited | Administrative & support | 1989 |
| N.D.F. Limited | Real estate | 1976 |
| N.G.E. Drainage and Plumbing Limited | Construction | 1998 |
| N.P.M. Accounting Services Limited | Professional & scientific | 2005 |
| N.W. Transpormations Ltd | Wholesale & retail | 2018 |
| N430 Consultants Ltd | Professional & scientific | 2015 |
| NA & CB Property Limited | Construction | 2024 |
| NA Yachting Limited | Extraterritorial | 2023 |
| NAD Plus Online Ltd | Health & social care | 2025 |
| Nadi & Market Limited | Wholesale & retail | 2025 |
| Nadine Kitchens Ltd | Construction | 2026 |
| Nail BUS Ltd | Other services | 2018 |
| Nail Your Beauty Ltd | Other services | 2024 |
| Nala Yachting Ltd | Arts & recreation | 2024 |
| Namesra Yachting Ltd | Extraterritorial | 2024 |
| Namploy Blackpool Ltd | Wholesale & retail | 2021 |
| Nancy Milligan Medical Ltd | Professional & scientific | 2014 |
| Nanjo Limited | Professional & scientific | 2008 |
| Napco Limited | Administrative & support | 2009 |
| Napier Lodge Limited | Health & social care | 2012 |
| NAR Sailing Ltd | Extraterritorial | 2024 |
| Nary M Consultancy Ltd | Professional & scientific | 2021 |
| Natalia & Clara Construction Ltd | Manufacturing | 2024 |
| Natalie Rixon Consulting Ltd | Professional & scientific | 2024 |
| Natanyos Marketing Ltd | Administrative & support | 2021 |
| Nateby Court Maintenance Company (Blackpool) Ltd | Households | 1972 |
| Nathans Parlour Ltd | Wholesale & retail | 2004 |
| National Energy Savers Limited | Construction | 2020 |
| National Federation of Self Employed and Small Businesses Limited | Administrative & support | 1976 |
| National Neat Holdings Ltd | Education | 2024 |
| National Pontoon Ltd | Administrative & support | 2019 |
| Nationwide Caravan Repairs Limited | Construction | 2020 |
| Nationwide Clutch Distributors UK Ltd | Wholesale & retail | 2004 |
| Nationwide Developers Ltd | Construction | 2023 |
| Nationwide Energy & Power Limited | Energy | 2014 |
| Nationwide Protection Ltd | Information & communication | 2024 |
| Nationwide Trades Ltd | Construction | 2022 |
| Naturaelis Limited | Financial services | 2024 |
| Naturescape North West CIC | Administrative & support | 2025 |
| Navarasa Group Ltd | Wholesale & retail | 2026 |
| Navigate Healthtech Ltd | Professional & scientific | 2025 |
| Nayak Foundation CIC | Education | 2021 |
| Nayak Properties Ltd | Real estate | 2019 |
| Nazora Properties Ltd | Real estate | 2025 |
| NB Brows & PMU Ltd | Other services | 2021 |
| NB Energy Limited | Information & communication | 2013 |
| NB PMU Training Ltd | Education | 2022 |