| New Day Properties Ltd | Real estate | 2025 |
| New Door Homes Ltd | Real estate | 2020 |
| New Highwood Holdings Ltd | Construction | 2021 |
| New Home Company Construction Ltd | Construction | 2017 |
| New Market Walk Developments Northampton Limited | Construction | 2020 |
| New Normal Studio Limited | Professional & scientific | 2012 |
| New OPS Holdings Limited | Financial services | 2021 |
| New Phase Electrical Limited | Construction | 2011 |
| New River Avon Chinese Restaurant Limited | Hospitality | 2012 |
| New Street Takeaway Ltd | Hospitality | 2024 |
| New Way Housing Limited | Real estate | 2015 |
| New World Automotive Limited | Professional & scientific | 2019 |
| Newbury Property Limited | Real estate | 2002 |
| Newey Property Ltd | Construction | 2024 |
| Newgen Innovations Limited | Professional & scientific | 2004 |
| Newhall Consulting Ltd | Information & communication | 2024 |
| Newlands Court Commercial Management Company Limited | Real estate | 2005 |
| Newman Trips & Tours Ltd | Administrative & support | 2025 |
| Newmove Trading Ltd | Real estate | 2013 |
| Newouda Warehousing Service Limited | Transport & logistics | 2026 |
| Newport & Telford Funeral Service Ltd | Extraterritorial | 2013 |
| Newport Hire(I.W.)Limited | Extraterritorial | 1962 |
| News & Booze (Walsall) Limited | Wholesale & retail | 2017 |
| Newsome's Funeral Service (Royston) Limited | Extraterritorial | 1983 |
| Newton Croft (Management Co) Ltd | Households | 2026 |
| Newtown Metrology Limited | Professional & scientific | 1998 |
| Newvision Promotions Limited | Manufacturing | 1991 |
| Nexlock Limited | Wholesale & retail | 2025 |
| Next Generation Academy Ltd | Education | 2022 |
| Nextgen AI Technologies Limited | Information & communication | 2024 |
| Nextlink Consultancy Limited | Health & social care | 2023 |
| Nexus Capital Development Limited | Real estate | 2026 |
| Nexus Care Services Limited | Health & social care | 2020 |
| NH Pharm Ltd | Health & social care | 2017 |
| NH Pharmaco Ltd | Health & social care | 2025 |
| NH Propco Ltd | Real estate | 2026 |
| NHC Housing Ltd | Real estate | 2026 |
| NHC Land 2 Ltd | Real estate | 2022 |
| NHC Land Ltd | Construction | 2020 |
| Nibby Design Ltd | Professional & scientific | 2004 |
| NIC Whittaker Limited | Financial services | 2015 |
| Nican Health Limited | Health & social care | 2026 |
| Nicholas Road Limited | Real estate | 2025 |
| Nicholexniauk Ltd | Health & social care | 2026 |
| Nicholls Memorials Limited | Extraterritorial | 2004 |
| Nicks Grill Limited | Hospitality | 2019 |
| Nicolaou Investment Limited | Real estate | 2025 |
| Niem Holdings Limited | Other services | 2024 |
| Nifty Needle Limited | Wholesale & retail | 2015 |
| Night City Electrical Ltd | Construction | 2026 |
| Night OUT Entertainments Ltd | Wholesale & retail | 2018 |
| Nijjar Brothers Developments Ltd | Real estate | 2025 |
| Nikolaz Limited | Real estate | 2010 |
| Nikos Investments Limited | Real estate | 2026 |
| Nilakshi's Bells & Beats Ltd | Arts & recreation | 2024 |
| NIM Pharma Limited | Health & social care | 2014 |
| Nipa PVT Ltd | Real estate | 2020 |
| Nippy Investments Ltd | Real estate | 2020 |
| Nirmal Homes Limited | Hospitality | 2016 |
| Nirsun Homes Ltd | Wholesale & retail | 2021 |
| Nirsun Properties Ltd | Real estate | 2017 |
| Niscolt Ltd | Wholesale & retail | 2025 |
| Nishaan Limited | Wholesale & retail | 2024 |
| Nisian Monk Limited | Real estate | 1971 |
| Nitrogen and Compressed Air Treatment Limited | Professional & scientific | 2017 |
| NJC Financial Limited | Financial services | 2013 |
| NKC Innovations Ltd | Financial services | 2026 |
| Nkompass Installations Ltd | Construction | 2019 |
| NLO IT Consultancy Ltd | Information & communication | 2015 |
| NMK3 Properties Limited | Real estate | 2021 |
| NMS Davies Limited | Professional & scientific | 2024 |
| NN Associates Ltd | Other services | 2022 |
| NNI Ltd | Financial services | 2024 |
| Nniche Limited | Manufacturing | 2023 |
| Noah Social (2019) Ltd | Health & social care | 2019 |
| Noble Motor Company Limited | Wholesale & retail | 2003 |
| Nomad Medicare Limited | Health & social care | 2025 |
| Noodle Express Fast Food Ltd | Hospitality | 2025 |
| Nook & Desk Ltd | Wholesale & retail | 2026 |
| Nookbazaar Ltd | Wholesale & retail | 2025 |
| Noolabs Limited | Wholesale & retail | 2019 |
| Noolabs Trading Limited | Wholesale & retail | 2020 |
| Noor Holdings Limited | Financial services | 2016 |
| Noor Prop Limited | Real estate | 2025 |
| Noosa Bay Limited | Real estate | 2023 |
| Norfolk Crematorium,Limited | Extraterritorial | 1967 |
| Norma's Touch Limited | Hospitality | 2025 |
| Normanton Property Limited | Real estate | 2022 |
| North Lodge Oxford Limited | Real estate | 2025 |
| North Stone Accountants Limited | Professional & scientific | 2018 |
| North Winchcombe Limited | Wholesale & retail | 2019 |
| Northam Development Consultants Limited | Professional & scientific | 2021 |
| Northampton Crematorium Limited | Extraterritorial | 1953 |
| Northbilt Developments Limited | Real estate | 1959 |
| Northern Developments Limited | Real estate | 2016 |
| Northern Site Electrics Limited | Construction | 2010 |
| Northern Site Installations Limited | Construction | 2016 |
| Northfield Group Limited | Professional & scientific | 2024 |
| Northpoint(Burry Port) Ltd | Households | 2012 |
| Northwood Investments 1 Ltd | Real estate | 2018 |