| Neatward Limited | Extraterritorial | 2026 |
| Needcade Limited | Extraterritorial | 2021 |
| Needglen Limited | Extraterritorial | 2006 |
| Needglyn Limited | Extraterritorial | 2025 |
| Needpine Limited | Wholesale & retail | 2025 |
| Needrate Limited | Information & communication | 2024 |
| Needshaw Limited | Extraterritorial | 2025 |
| Needstar Limited | Extraterritorial | 2026 |
| NEF Aviation Services Limited | Manufacturing | 2011 |
| Neil Boobyer Rugby Solutions Limited | Education | 2011 |
| Neil Levy Rigging Limited | Information & communication | 2010 |
| Neil's Property Management Limited | Real estate | 2025 |
| Nelinde Gaming Ltd | Manufacturing | 2022 |
| Nemein Precision Engineering Ltd | Manufacturing | 2023 |
| Nest Wise Properties Ltd | Hospitality | 2018 |
| Nestus Ltd | Construction | 2024 |
| NET Zero Industry Wales Limited | Other services | 2022 |
| Networth Finance Ltd | Financial services | 2025 |
| Neuf Trous CYF | Arts & recreation | 2014 |
| Neuro Physio Wales Ltd | Health & social care | 2003 |
| New Air Technical Services Limited | Manufacturing | 1980 |
| New Eco Developments Limited | Real estate | 2014 |
| New Garden Restaurant Limited | Hospitality | 2014 |
| New KEG Co Limited | Manufacturing | 2014 |
| New Look Furniture Limited | Wholesale & retail | 2001 |
| New Phones Limited | Information & communication | 2018 |
| New Road Flip Ltd | Real estate | 2024 |
| Newbridge Counselling Bridgend Limited | Health & social care | 2022 |
| Newcover Limited | Wholesale & retail | 2023 |
| Newid Impact Limited | Professional & scientific | 2026 |
| Newlands Drive Limited | Households | 2025 |
| Newman Auto Repairs Limited | Wholesale & retail | 2020 |
| Newman's MOT Services Limited | Wholesale & retail | 2015 |
| Newride Limited | Wholesale & retail | 2011 |
| Newtech 3000 Limited | Information & communication | 2008 |
| Newton (Porthcawl) Estate Company Limited | Other services | 1934 |
| Newton Beach Development Company Limited | Administrative & support | 2008 |
| Newton Croft Management Limited | Households | 1990 |
| Newtown Chinese Takeaway Limited | Hospitality | 2024 |
| Next Step Qualifications Limited | Education | 2025 |
| Neyu Transport Ltd | Transport & logistics | 2026 |
| NH Delight Limited | Hospitality | 2026 |
| NIC Knows HR Limited | Administrative & support | 2025 |
| NIC Trading Limited | Financial services | 2023 |
| Nice Price Furniture Limited | Wholesale & retail | 1999 |
| Nick Lang Contracting SW Limited | Transport & logistics | 2016 |
| Nick Richards Commercial Limited | Real estate | 2015 |
| Nicola Reeves Travel & Memories Agent Ltd | Administrative & support | 2025 |
| Night of the Living Dead Ltd | Information & communication | 2011 |
| Nightingales Community Hub CIC | Wholesale & retail | 2024 |
| Nightjar Haven Property Limited | Hospitality | 2024 |
| Nimah Tandoori Ltd | Hospitality | 2022 |
| Nina Davies Limited | Health & social care | 2006 |
| Ninety SIX Degree Coffee Limited | Hospitality | 2018 |
| Nishman Barbers Bridgend Ltd | Other services | 2025 |
| Nitelife Barry Ltd | Hospitality | 2018 |
| Nitelife Port Talbot Ltd | Hospitality | 2018 |
| Nizuru Ltd | Professional & scientific | 2024 |
| NJT Family Property Investments Ltd | Real estate | 2022 |
| Nkt.Primus Ltd | Information & communication | 2023 |
| Nlsj Property Solutions Limited | Real estate | 2025 |
| NNA Convenience Stores Ltd | Wholesale & retail | 2024 |
| NO. 27 Wine Bar Limited | Hospitality | 2025 |
| Nobleflow Limited | Information & communication | 2025 |
| Nodor Company,Limited(The) | Extraterritorial | 1938 |
| Nodor International Limited | Manufacturing | 1994 |
| NOL Properties Ltd | Real estate | 2024 |
| Nola Estates Ltd | Real estate | 2022 |
| Nolan Customs Limited | Transport & logistics | 2019 |
| Nolan Realty Limited | Real estate | 2009 |
| Nolan Recycling Group Limited | Professional & scientific | 2012 |
| Nolan Transport (UK) Ltd | Transport & logistics | 2016 |
| Nolan Transport Holdings Limited | Transport & logistics | 2016 |
| Nolton Bowl Limited | Hospitality | 2021 |
| Nolton CUT Barbers Limited | Other services | 2023 |
| Nolton Tandoori Ltd | Administrative & support | 2019 |
| Nomad Mechanical Services Ltd | Manufacturing | 2025 |
| Noon Multi Media Limited | Administrative & support | 2005 |
| Noosa Projects Limited | Construction | 2004 |
| Nordale Court Management Company Limited | Professional & scientific | 1964 |
| Noria 261001 Ltd | Administrative & support | 2026 |
| North Conelly Pizza New Ltd | Hospitality | 2026 |
| North Voyages Ltd | Administrative & support | 2024 |
| Northall Limited | Extraterritorial | 2025 |
| Northfox Limited | Information & communication | 2024 |
| Northlake Property Limited | Real estate | 2023 |
| Northleach Lettings Limited | Real estate | 2024 |
| Northley Limited | Extraterritorial | 2025 |
| Northray Limited | Extraterritorial | 2025 |
| Northward Solutions Limited | Wholesale & retail | 2004 |
| Norton Property Services Limited | Construction | 2024 |
| Norwegian Developments LLP | | 2012 |
| Nosdar (Developments) Limited | Construction | 1957 |
| Nottage Joinery Limited | Construction | 1973 |
| Nourish Wellbeing Ltd | Hospitality | 2026 |
| Nova Medical Limited | Health & social care | 2025 |
| Nova Nifts Ltd | Wholesale & retail | 2025 |
| Novabray Limited | Extraterritorial | 2022 |
| Novamoss Limited | Extraterritorial | 2025 |
| Novella Visual Limited | Professional & scientific | 2023 |