| Nature Awareness Ltd | Health & social care | 2024 |
| NB Reel Estate Limited | Real estate | 2024 |
| ND Label Ltd | Wholesale & retail | 2025 |
| Neil Clarke Developments Limited | Construction | 2023 |
| Neptune Brewery Ltd | Manufacturing | 2015 |
| Nest Residential Care Limited | Health & social care | 2023 |
| Netwerkhaven Tech Ltd | Information & communication | 2025 |
| Network-Base Ltd | Wholesale & retail | 2024 |
| Never PAY Retail Limited | Wholesale & retail | 2016 |
| Nevera Properties Limited | Real estate | 1949 |
| New Brook Developments (Yardley) Limited | Real estate | 1964 |
| New ERA Property Management Ltd | Professional & scientific | 2020 |
| Newgrange Property Company Ltd | Real estate | 2024 |
| News Factor (Bolton) Ltd | Wholesale & retail | 2017 |
| Nexgen Controls Ltd | Construction | 2023 |
| Next Wave Generation Ltd | Professional & scientific | 2025 |
| Nexus Firesec Ltd | Construction | 2026 |
| Nimsara Ltd | Wholesale & retail | 2023 |
| Nine Dragons Martial Arts Ltd | Education | 2025 |
| Nithis Ltd | Real estate | 2022 |
| NO Digging Ltd | Construction | 2018 |
| Nonso Co. Ltd | Wholesale & retail | 2025 |
| Norie Developments Limited | Real estate | 2023 |
| Norie Group Holdings Limited | Financial services | 2023 |
| Norkson Breakdown Recovery Ltd | Transport & logistics | 2024 |
| Normac Shipping Limited | Transport & logistics | 2000 |
| North Liverpool Construction Limited | Construction | 1986 |
| North Park Convenience Store Limited | Wholesale & retail | 2016 |
| North Park Fireworks Ltd | Wholesale & retail | 2020 |
| North Park Tavern Ltd | Hospitality | 2019 |
| North Valley Supplies Limited | Professional & scientific | 2014 |
| North West CNC Milling Services Ltd | Professional & scientific | 2025 |
| North West Construction & Carpentry Ltd | Construction | 2025 |
| North West Forktrucks Limited | Wholesale & retail | 2014 |
| North West Locum Service Limited | Real estate | 1989 |
| North West Luxury Travel Ltd | Administrative & support | 2023 |
| North West Properties Investments Limited | Real estate | 2012 |
| North West Property Transformations Ltd | Construction | 2025 |
| North West Turbos Liverpool Limited | Wholesale & retail | 2023 |
| Northern Abrasives Limited | Wholesale & retail | 1975 |
| Northern Property Lettings Limited | Real estate | 2017 |
| Northliverpoolflooring Ltd | Wholesale & retail | 2019 |
| Northwest Entertainments Limited | Wholesale & retail | 2015 |
| Northwest Leak Detection Ltd | Construction | 2024 |
| Northwest Liverpool Young Engineers Ltd | Education | 2025 |
| Northwest Local Stores Ltd | Wholesale & retail | 2023 |
| NS Digital Art Ltd | Professional & scientific | 2021 |
| Ntgw Limited | Real estate | 2023 |
| NU Networks Ltd | Construction | 2024 |
| Nurture IQ Ltd | Professional & scientific | 2025 |
| Nutella House Limited | Hospitality | 2024 |
| Nutrihub Performance Limited | Wholesale & retail | 2025 |
| Nutritionforlife Wellness CIC | Health & social care | 2026 |
| Nuts 4 Travel Limited | Administrative & support | 2019 |
| NW Capital Investments Group Ltd | Wholesale & retail | 2023 |
| NW Props and Prints Ltd | Manufacturing | 2023 |
| Nweps Ltd | Construction | 2025 |
| NWF Bootle Ltd | Construction | 2011 |
| NWR Property Limited | Real estate | 2015 |
| Nyakaz Ltd | Other services | 2014 |
| Nyamma's Bakery Ltd | Manufacturing | 2025 |
| O & C Kennard Associates Limited | Administrative & support | 2019 |
| O Suites Ltd | Information & communication | 2022 |
| O&A Garage Liverpool Ltd | Wholesale & retail | 2026 |
| Oakfield One Ltd | Transport & logistics | 2023 |
| Oaklan Trading Ltd | Wholesale & retail | 2025 |
| Oakmere Services Ltd | Real estate | 2018 |
| Oasis in the Park Ltd | Hospitality | 2011 |
| ODL Europe Limited | Manufacturing | 2004 |
| ODL Holdings Limited | Professional & scientific | 2004 |
| Officialpubguide.Com Limited | Professional & scientific | 2009 |
| Officialvizeh Ltd | Information & communication | 2023 |
| Offroute Limited | Wholesale & retail | 2023 |
| OK Services Ltd | Professional & scientific | 2025 |
| OK Student Ltd | Education | 2025 |
| Okotito Ltd | Wholesale & retail | 2026 |
| Old George Transport Ltd | Transport & logistics | 2018 |
| Old Hall Inns & Taverns Limited | Hospitality | 1978 |
| Ollis L.D. Limited | Construction | 2019 |
| Omdelivery Ltd | Transport & logistics | 2026 |
| Omega Discount Plastics Limited | Wholesale & retail | 2001 |
| Omega Perfect Space Ltd | Wholesale & retail | 2017 |
| Omis Developments Ltd | Construction | 2025 |
| One Latin Culture | Education | 2011 |
| One Stop Design Shop Limited | Wholesale & retail | 2022 |
| One/Phase Ltd | Construction | 2025 |
| Ontrek Ltd | Wholesale & retail | 2025 |
| Onyx Music Mentoring and Development CIC | Information & communication | 2025 |
| Onyx Outdoors Ltd | Wholesale & retail | 2019 |
| Onyx Real Estate Investment Ltd | Real estate | 2020 |
| OP Consultants Limited | Wholesale & retail | 2019 |
| Optic Bi-Folds UK Limited | Manufacturing | 2020 |
| Optic Upvc Windows Ltd | Manufacturing | 2022 |
| Optics Limited | Real estate | 2001 |
| Optimal Health and Safety Solutions Ltd | Construction | 2019 |
| Opulence Transport Ltd | Transport & logistics | 2024 |
| Opus Media Limited | Information & communication | 2012 |
| Orange Lake Properties Limited | Real estate | 2023 |
| Orbit MIS Ltd | Information & communication | 2018 |
| Orchid Cove Hair and Beauty Limited | Administrative & support | 2021 |