| Nextgen Consultancy Group Ltd | Public administration | 2025 |
| Nexus European Ltd | Transport & logistics | 2025 |
| NG Waste Management Ltd | Water & waste | 2026 |
| NGP Trends Ltd | Professional & scientific | 2022 |
| Nibori Limited | Extraterritorial | 2004 |
| Nicestyle Limited | Health & social care | 2008 |
| Nicestyle Properties Limited | Real estate | 2023 |
| Nick Jackson Consulting Ltd | Professional & scientific | 2022 |
| Nicola Cahill Anaesthetic Services Limited | Health & social care | 2025 |
| Nieves Barragan Limited | Hospitality | 2024 |
| Nigel Metcalfe Ltd | Construction | 2017 |
| Nikau Consultancy Ltd | Education | 2025 |
| Nikolov Orthodontics Ltd | Health & social care | 2016 |
| NINETEEN38 Limited | Wholesale & retail | 2018 |
| NINETEEN78 Limited | Financial services | 2018 |
| NJR Global Ltd | Hospitality | 2021 |
| NKA Haulage Limited | Extraterritorial | 2015 |
| Noctam Limited | Information & communication | 2018 |
| Noiro Limited | Information & communication | 2014 |
| Noise Agency Ltd | Information & communication | 2014 |
| Nomad Music Events Ltd | Arts & recreation | 2020 |
| Nomadic Life Ltd | Professional & scientific | 2025 |
| Norbreck Self Storage Ltd | Other services | 2023 |
| Norman Developments (NW) Limited | Construction | 2020 |
| Norman Gorrill Limited | Real estate | 1949 |
| Normesh Limited | Manufacturing | 2002 |
| North Atlantic Limited | Agriculture & fishing | 2018 |
| North by Northwest Limited | Arts & recreation | 2014 |
| North Star Projects Ltd | Professional & scientific | 2019 |
| North West Bird Control Ltd | Transport & logistics | 2012 |
| North West Inspection Services Ltd | Professional & scientific | 2020 |
| North West Investment Holdings Ltd | Construction | 2021 |
| North West Luxury Living Ltd | Real estate | 2022 |
| North West Pleural Academy Limited | Education | 2024 |
| North West Roofing Limited | Construction | 2015 |
| North West Sauna Company Ltd | Other services | 2026 |
| Northbeam Advisory Limited | Professional & scientific | 2025 |
| Northbound PR Ltd | Professional & scientific | 2026 |
| Northbound Wines Ltd | Wholesale & retail | 2026 |
| Northern Chicken (Cold Stores) Limited | Wholesale & retail | 1967 |
| Northern Delights Lancaster Limited | Wholesale & retail | 2022 |
| Northern Hi-Tec Limited | Manufacturing | 1983 |
| Northern Leisure Parks Limited | Hospitality | 2020 |
| Northern Morris Associated Cinemas Ltd | Financial services | 2009 |
| Northern Practice Co. Limited | Extraterritorial | 2013 |
| Northern RIB Hire Limited | Manufacturing | 2006 |
| Northern Solar Power Ltd | Construction | 2022 |
| Northgate Business Park Management Company Limited | Real estate | 2008 |
| Northstar PM Ltd | Administrative & support | 2021 |
| Northwest Single PLY & Building Limited | Construction | 2022 |
| Northwesterner Limited | Professional & scientific | 2025 |
| Northwood (Lancaster) Limited | Real estate | 2007 |
| Northwood Tissue (Lancaster) Limited | Manufacturing | 2012 |
| Norwood Court Management Company (Lancaster) Limited | Households | 1993 |
| NOW Recruit Ltd | Professional & scientific | 2012 |
| NRC Futures CIC | Education | 2025 |
| NS Elec Ltd | Construction | 2022 |
| NSR Accounting Services Limited | Professional & scientific | 2021 |
| NSR Fashion UK Limited | Wholesale & retail | 2025 |
| NTK Distribution Limited | Information & communication | 2008 |
| Nuclear Criticality Services Limited | Other services | 2012 |
| Nuevo Ltd | Professional & scientific | 2021 |
| Nuggetsmash Ltd | Information & communication | 2025 |
| Numafa Cleaning & Automation UK Limited | Administrative & support | 2016 |
| Nura Health Limited | Health & social care | 2025 |
| Nurture Care Inspections Limited | Public administration | 2025 |
| Nurture-Integral-Change-Expertise Ltd | Information & communication | 2014 |
| Nutrigrow Lancashire CIC | Wholesale & retail | 2024 |
| Nwgear Limited | Wholesale & retail | 2021 |
| NWT Flat Roofing Limited | Construction | 2022 |
| Nyameayei Limited | Health & social care | 2020 |
| Nytram Holdings Limited | Financial services | 2023 |
| Nytram Pro Gym - Chorley Limited | Arts & recreation | 2023 |
| Nytram Pro Refurbs Limited | Manufacturing | 2023 |
| Nytram Properties Limited | Real estate | 2023 |
| O Beauty Ltd | Wholesale & retail | 2019 |
| Oak Education 1:1 Ltd | Education | 2020 |
| Oak View (Woodplumpton) Management Company Limited | Households | 2024 |
| Obrien's Rentals Ltd | Real estate | 2025 |
| Ocala Construction Limited | Real estate | 1995 |
| Oceanic Seafoods Limited | Manufacturing | 2009 |
| Oddfellows Hall (Cityspace) Limited | Real estate | 2019 |
| Off-Piste Digital Limited | Information & communication | 2013 |
| Oglethorpe Sturton & Gillibrand LLP | | 2009 |
| OHH LA LA Ltd | Professional & scientific | 1999 |
| OJP Group Limited | Real estate | 2016 |
| OJR Property Investments Limited | Financial services | 2022 |
| Old Crookhey Limited | Water & waste | 2006 |
| Old Parkside Farm Ltd | Agriculture & fishing | 2023 |
| Old Parkside Properties Ltd | Construction | 2020 |
| Old Town Hall Mews Maintenance Company Limited | Households | 1985 |
| Olicana Financial Limited | Professional & scientific | 2023 |
| Ollecram Ltd | Professional & scientific | 2008 |
| Olton Investigations Ltd | Professional & scientific | 2021 |
| Omarmayar Limited | Real estate | 2017 |
| OMM Ltd. | Manufacturing | 1997 |
| ON Stage Performing Arts Limited | Arts & recreation | 2026 |
| ON the Move Food Ltd | Hospitality | 2026 |
| One Step Beyond Limited | Information & communication | 2023 |
| One Tenth Human | Arts & recreation | 2018 |