| Multicrete Products Limited | Manufacturing | 2006 |
| Munir Properties Limited | Real estate | 2017 |
| Murmac Leisure Ltd | Hospitality | 2019 |
| Musbury Wealth Management Ltd | Financial services | 2025 |
| My POD My Space Ltd | Construction | 2020 |
| My Total Office Solutions Ltd | Wholesale & retail | 2015 |
| My Wedding Flowers Ltd | Wholesale & retail | 2013 |
| Mycelium Holdings Ltd | Financial services | 2021 |
| Mycelium Properties Ltd | Real estate | 2021 |
| MYG Global Limited | Wholesale & retail | 2026 |
| Mygardener, Private & Commercial Garden Maintenance Ltd | Administrative & support | 2021 |
| Myrtle Earth Farm Limited | Agriculture & fishing | 2024 |
| N Callan Engineering Limited | Professional & scientific | 2012 |
| N W Site Inspections Limited | Real estate | 2006 |
| N.J.T. Limited | Wholesale & retail | 2002 |
| N24 Properties Ltd | Real estate | 2024 |
| Nadiam Limited | Health & social care | 2025 |
| Nail for YOU Haslingden Ltd | Other services | 2023 |
| Nakud Limited | Health & social care | 2021 |
| Nasco Trading Ltd | Wholesale & retail | 2026 |
| Nati KN Limited | Professional & scientific | 2006 |
| National Commercial Services Ltd | Financial services | 2019 |
| Naylaw Ltd | Professional & scientific | 2024 |
| NC Salford Holdings Ltd | Real estate | 2022 |
| NCM Medical & Aesthetics Ltd | Health & social care | 2025 |
| NCS IT Limited | Information & communication | 1994 |
| NCS IT Services Limited | Extraterritorial | 2021 |
| NCS Support Services Limited | Extraterritorial | 2018 |
| ND Hospitality Ltd | Hospitality | 2025 |
| Neilson Control Installations Limited | Construction | 2008 |
| Netweaver.Com Limited | Information & communication | 2001 |
| Never Naked Ltd | Other services | 2023 |
| New Generation Kitchens Ltd | Construction | 2010 |
| New Hall Developments (NW) Ltd | Construction | 2024 |
| New Pleasant View Ltd | Other services | 2026 |
| New RAJ Ltd | Hospitality | 2022 |
| New Start Energy Limited | Professional & scientific | 2013 |
| Newbarn Limited | Health & social care | 1993 |
| Newdale Investments Ltd | Real estate | 2023 |
| Newstrade Logistics Limited | Transport & logistics | 2004 |
| Newton Footwear Agencies Limited | Wholesale & retail | 2020 |
| Next GEN Interiors NW Ltd | Construction | 2022 |
| Nextgen Energy Solutions Limited | Construction | 2025 |
| NG Commercial Developments Ltd | Construction | 2012 |
| NHG Integrated Systems Ltd | Construction | 2025 |
| Ninja Coffee Mobile & Events Ltd | Manufacturing | 2024 |
| Ninja Coffee Shops Ltd | Manufacturing | 2022 |
| Nirok Investments Limited | Construction | 2024 |
| NIX Construction Solutions Ltd | Professional & scientific | 2025 |
| Nixon-Haris Properties Limited | Real estate | 2022 |
| NJH Medical Ltd | Education | 2023 |
| NJH Wealth Management Limited | Financial services | 2002 |
| NK Genetics Training Limited | Health & social care | 2014 |
| Nordale Resin Flooring Ltd | Construction | 2026 |
| Norpress Limited | Information & communication | 1988 |
| North ST Ross Ltd | Hospitality | 2024 |
| North Street Restaurant Ltd | Hospitality | 2017 |
| North West Plumbing and GAS Ltd | Construction | 2023 |
| North West Removals and Storage Limited | Transport & logistics | 2014 |
| North West Tier 1 Properties Ltd | Real estate | 2024 |
| Northern Creative Limited | Professional & scientific | 2020 |
| Northern Flame Candle Company Limited | Manufacturing | 2026 |
| Northern Light Advisory Limited | Professional & scientific | 2009 |
| Northern Logic Tech Ltd | Professional & scientific | 2025 |
| Northern Snagging Co Ltd | Construction | 2023 |
| Northern Soul Capital Growth LP | | 2013 |
| Northern Sports & Wellbeing Ltd | Real estate | 2024 |
| Northern Ventilation Ltd | Other services | 2019 |
| Northern Whisper Brewing Company Limited | Manufacturing | 2017 |
| Northernmadeco Limited | Arts & recreation | 2022 |
| Northernprintingco Limited | Arts & recreation | 2022 |
| Northkind CIC | Education | 2026 |
| Northwest Psychotherapies Limited | Health & social care | 2012 |
| Northwest Welfare Ltd | Administrative & support | 2016 |
| Nouttosee Ltd | Wholesale & retail | 2023 |
| NPI Fire & Security Ltd | Administrative & support | 2010 |
| NRT Consultants Limited | Professional & scientific | 2019 |
| Nubia Holdings Limited | Financial services | 2021 |
| Nursery END Garden Centre Ltd | Agriculture & fishing | 2025 |
| Nvca | Other services | 2019 |
| NW Self Storage Ltd | Administrative & support | 2025 |
| NW Storage Holdings Ltd | Administrative & support | 2025 |
| O'Brien.C Ltd | Professional & scientific | 2019 |
| Oafk Ltd | Financial services | 2025 |
| Oak HEY Limited | Wholesale & retail | 2013 |
| Oakenhead (Rawtenstall) Management Company Limited | Households | 2019 |
| Oasis Plumbing & Heating Limited | Construction | 2021 |
| Obdale Ltd | Professional & scientific | 2021 |
| Ocean Moulds Ltd | Manufacturing | 2020 |
| Octopus Compliance Limited | Information & communication | 2019 |
| OF Dirt & Grace Ltd | Wholesale & retail | 2025 |
| Off-Market Developments Ltd | Construction | 2025 |
| Old Cars & Spares Ltd | Wholesale & retail | 2021 |
| Old Madison Ltd | Hospitality | 2019 |
| Oliver John Ltd | Real estate | 2026 |
| Omega Creative Network Ltd | Information & communication | 2025 |
| OMG - OH My Gifts Ltd | Wholesale & retail | 2024 |
| ON Site Finance Director Limited | Professional & scientific | 2020 |
| One Call Business Services Limited | Administrative & support | 2008 |
| One Call Leasing Limited | Extraterritorial | 2012 |