| Multi Broker Ltd | Financial services | 2020 |
| Multi Circuit Metering UK Ltd | Manufacturing | 2021 |
| Murphy's MOT Testing Station Limited | Wholesale & retail | 2017 |
| Murray DPS Holdings Ltd | Real estate | 2025 |
| Murray Moore Services Limited | Professional & scientific | 2008 |
| Murrays Direct Pallet Services Ltd | Wholesale & retail | 2001 |
| Murrayview Property Group Ltd | Real estate | 2026 |
| MWX Limited | Professional & scientific | 2024 |
| My Life Social Support Ltd | Health & social care | 2009 |
| My Media INK Ltd | Construction | 2017 |
| My Property (Merseyside) Limited | Real estate | 2002 |
| MYG Stars Ltd | Arts & recreation | 2019 |
| MYO Interiors Ltd | Professional & scientific | 2019 |
| MYO Made Ltd | Manufacturing | 2019 |
| Myriad Collective Limited | Financial services | 2019 |
| N & a Horizons Ltd | Construction | 2025 |
| N&B Law Ltd | Real estate | 2021 |
| N&L Group Limited | Hospitality | 2023 |
| N&Tor Property Ltd | Real estate | 2024 |
| N. W. Truck and Mixer Repairs Ltd | Manufacturing | 2005 |
| N.A.C Development Ltd | Construction | 2024 |
| N8 Business Solutions Ltd | Information & communication | 2018 |
| Nannau Developments Ltd | Construction | 2025 |
| Nannovo Limited | Health & social care | 2026 |
| Nanson Brothers Plastering Contractors Limited | Construction | 2012 |
| Nant-Y-Gwrdu Limited | Hospitality | 1936 |
| Narita House Pizza Ltd | Hospitality | 2023 |
| Narita Pizza Widnes Ltd | Hospitality | 2025 |
| National Wall Installations Limited | Construction | 2018 |
| Natures World Pet Supplies Ltd | Wholesale & retail | 2024 |
| NCJ Property Limited | Real estate | 2024 |
| NCR Survey Supplies Ltd | Wholesale & retail | 2024 |
| Neighbourhood Connectors CIC | Health & social care | 2026 |
| Nest Worthy Ltd | Households | 2026 |
| Network Print Solutions Limited | Manufacturing | 2008 |
| Neuroaffirmative Consultancy & More Limited | Extraterritorial | 2025 |
| Never 4GOTTEN Ltd | Information & communication | 2025 |
| Nevjen Limited | Wholesale & retail | 2024 |
| New Future Horizon Ltd | Wholesale & retail | 2022 |
| New Ground Developments Ltd | Households | 2019 |
| Newburgh New Burch Estate Developments Ltd | Construction | 2025 |
| Newkind Limited | Information & communication | 2026 |
| Newlyn Healthcare Specialist Equipment Limited | Wholesale & retail | 2004 |
| Newnes Property Ltd | Real estate | 2022 |
| Newo Sound and Wellness Limited | Other services | 2024 |
| Newtech Data Tracking Ltd | Information & communication | 2015 |
| Newton PMK Ltd | Real estate | 2024 |
| Newton-Le-Willows Blinds Ltd | Wholesale & retail | 2025 |
| Nextgen Consulting Limited | Information & communication | 2010 |
| NFC Health & Social Care Limited | Health & social care | 2018 |
| Nichols Naveed Limited | Health & social care | 2026 |
| Nicholson Hird Holiday Lets Limited | Hospitality | 2019 |
| Nicholson Hird Ltd | Administrative & support | 2016 |
| Nicola's Commercial Properties Limited | Real estate | 2016 |
| Nightstop Communities Northwest C.I.C. | Hospitality | 2012 |
| Nine Yards Limited | Professional & scientific | 1993 |
| Niro Test Services Limited | Information & communication | 2016 |
| NL Electrics Ltd | Construction | 2018 |
| NLS Enterprises (Widnes) Limited | Hospitality | 2023 |
| Nmo-Uk Rare Illness Research Foundation CIC | Information & communication | 2013 |
| NO Guru Ltd | Other services | 2005 |
| Nokuayisha Ltd | Health & social care | 2026 |
| Nononsense Holdings Ltd | Transport & logistics | 2019 |
| Norcott Instrumentation Limited | Manufacturing | 2006 |
| Norcott Technologies Limited | Manufacturing | 1997 |
| Norman Denton Associates Limited | Professional & scientific | 2011 |
| North Cheshire Accountants Limited | Professional & scientific | 2019 |
| North Cheshire Scaffolding Limited | Construction | 2016 |
| North West Billboards Ltd | Professional & scientific | 2017 |
| North West Contracts Widnes Limited | Construction | 2015 |
| North West Couriers Ltd | Transport & logistics | 2026 |
| North West Domestic Appliances Limited | Wholesale & retail | 2007 |
| North West Envirotruck Ltd. | Wholesale & retail | 2018 |
| North West Render Specialist Limited | Construction | 2011 |
| North West Render Systems Limited | Construction | 2019 |
| North-West Customs Widnes Ltd | Wholesale & retail | 2024 |
| Northern Auto Electrical Supplies Limited | Wholesale & retail | 2004 |
| Northstar Advisors Ltd | Professional & scientific | 2018 |
| Northwest Cardiovascular Imaging Ltd | Health & social care | 2023 |
| Northwest Demolition Ltd | Construction | 2021 |
| Northwest Heating Services (Widnes) Ltd | Construction | 2013 |
| Northwest Lifting Inc Ltd | Construction | 2026 |
| Northwest Tree Services Limited | Agriculture & fishing | 2014 |
| Nouvelle Ltd | Other services | 2022 |
| Nova Estate Agents Limited | Other services | 2022 |
| Novira Properties Ltd | Real estate | 2025 |
| NP Projects Limited | Information & communication | 2004 |
| Npjselectricalservices Ltd | Construction | 2025 |
| Nstar Trading Ltd | Wholesale & retail | 2025 |
| NTD Electrical Services Ltd | Construction | 2017 |
| NU Home Improvements Ltd | Construction | 2020 |
| Nu-Care Estates Ltd | Real estate | 2026 |
| Nu-Care Hub Ltd | Health & social care | 2025 |
| Nutis Ltd | Transport & logistics | 2017 |
| Nutrigood Ltd | Hospitality | 2022 |
| NW Security Systems Limited | Administrative & support | 2019 |
| NWE Electrical Services Ltd | Construction | 2023 |
| NWH Landscapes Ltd | Administrative & support | 2021 |
| O a Universal Ltd | Wholesale & retail | 2025 |
| O M Contractors (NW) Ltd | Construction | 2020 |