| Muhammad Abubakar Ltd | Wholesale & retail | 2025 |
| Mulligans Neath Ltd | Wholesale & retail | 2023 |
| Multi LET Management Ltd | Real estate | 2025 |
| Mumbles Electric (Installation and Maintenance) Limited | Construction | 2003 |
| Mums and Toddlers CIC | Health & social care | 2023 |
| Mundays Bar Ltd | Hospitality | 2022 |
| Munya Green Limited | Health & social care | 2019 |
| MWP Audio Limited | Information & communication | 2020 |
| My Conscious Mind UK Ltd | Manufacturing | 2025 |
| My-Board Limited | Other services | 2022 |
| Myrddin (Accommodation) Ltd. | Hospitality | 2000 |
| Mythscribe Ltd | Information & communication | 2025 |
| N & D Engineering Limited | Professional & scientific | 2016 |
| N & R Lettings Ltd | Real estate | 2024 |
| N Avery Properties Ltd | Real estate | 2022 |
| N Avery Property Holdings Ltd | Real estate | 2025 |
| N I Brown Limited | Professional & scientific | 2008 |
| N J M Construction Ltd | Construction | 2008 |
| N J Management Systems Ltd | Professional & scientific | 2024 |
| N Kabia Contracts Ltd | Administrative & support | 2013 |
| N R Curry Ltd | Hospitality | 2024 |
| Naissance Natural Ingredients Limited | Wholesale & retail | 2012 |
| Nannies Goat Milk Soap CYF | Manufacturing | 2024 |
| Naseem Foods Limited | Wholesale & retail | 2024 |
| Natashalisa Limited | Administrative & support | 2025 |
| Nathaniel Watts Estates Ltd | Real estate | 2025 |
| Natmeg Ltd | Hospitality | 2020 |
| Nayany Supermart Limited | Wholesale & retail | 2025 |
| Neath Abbey Construction Limited | Construction | 1996 |
| Neath Afan Gymnastics and Activities Limited | Arts & recreation | 2009 |
| Neath Air GUN Centre Ltd | Arts & recreation | 2018 |
| Neath Athletic Rugby Football Club Ltd | Arts & recreation | 2016 |
| Neath Cafe Ltd | Hospitality | 2024 |
| Neath Chiropody Clinic Limited | Health & social care | 2003 |
| Neath Cladding Ltd | Construction | 2021 |
| Neath Coach Travel Ltd | Administrative & support | 2011 |
| Neath Comedy Festival Ltd | Hospitality | 2022 |
| Neath Community Tennis Courts Limited | Arts & recreation | 2018 |
| Neath Cricket Club Limited | Arts & recreation | 2025 |
| Neath Delight Limited | Hospitality | 2024 |
| Neath EAR WAX Removal Specialists Ltd | Health & social care | 2024 |
| Neath Eatout Ltd | Hospitality | 2024 |
| Neath Fish&Chips Ltd | Hospitality | 2026 |
| Neath Flyers Academy CIC | Education | 2019 |
| Neath Football Club Ltd | Arts & recreation | 2009 |
| Neath GAS Services Ltd | Construction | 2022 |
| Neath Glass & Glazing Ltd | Construction | 2024 |
| Neath Golf Club Limited | Arts & recreation | 2023 |
| Neath Gym & Studio Ltd | Other services | 2024 |
| Neath Hand Car Wash Ltd | Wholesale & retail | 2026 |
| Neath Hardware Limited | Construction | 2008 |
| Neath Mini Market Limited | Wholesale & retail | 2026 |
| Neath MOT Centre Limited | Wholesale & retail | 2015 |
| Neath Pharmacy Ltd | Wholesale & retail | 2019 |
| Neath Port Talbot Carers Service Ltd | Health & social care | 2009 |
| Neath Port Talbot Child Contact Centre | Health & social care | 2005 |
| Neath Port Talbot Children's Rights Unit | Education | 2003 |
| Neath Port Talbot College Enterprises Limited | Professional & scientific | 1994 |
| Neath Port Talbot Mind Association | Other services | 1999 |
| Neath Rugby Limited | Arts & recreation | 2003 |
| Neath Vale Properties Limited | Real estate | 2022 |
| Neath Window Care Limited | Construction | 2024 |
| Neil Jenkins Solutions Limited | Construction | 2009 |
| Neil Llewellyn Ltd | Construction | 2015 |
| Neotek Labs Ltd | Other services | 2022 |
| Neuadd Drymmau Care Home Ltd | Health & social care | 2006 |
| Neurological Rehabilitation Wales CIC | Other services | 2018 |
| New Garden Oasis Limited | Hospitality | 2023 |
| New Garden Works Ltd | Hospitality | 2025 |
| New Life & New Choice Ltd | Hospitality | 2022 |
| Newlands Building Contractors Ltd | Construction | 2021 |
| Nexus Design UK Ltd | Professional & scientific | 2021 |
| Nexus Renewables Ltd | Construction | 2025 |
| Nicholas Process Systems Ltd | Manufacturing | 2017 |
| Nick & James Limited | Wholesale & retail | 2008 |
| Nicola and Sons Limited | Hospitality | 2026 |
| Nidum Consulting Ltd | Professional & scientific | 2019 |
| Nidum House Management Company Limited | Administrative & support | 2011 |
| Nidum Limited | Arts & recreation | 2026 |
| Niloji Retail Ltd | Wholesale & retail | 2025 |
| Nimimehek's Tech Ltd | Information & communication | 2023 |
| Nitelite Security and Property Services Ltd | Administrative & support | 2012 |
| Nitro Group Limited | Administrative & support | 2015 |
| NIX Loungewear Ltd. | Manufacturing | 2024 |
| NJJ Consultancy Services Limited | Extraterritorial | 2013 |
| NO 6 at Bronleigh House Ltd | Hospitality | 2026 |
| Nonk Ltd | Wholesale & retail | 2023 |
| Northern Batch Ltd | Wholesale & retail | 2025 |
| Northfields Rotherham Management Company Limited | Real estate | 2017 |
| NPD Weld Ltd | Manufacturing | 2025 |
| NPT Electrics Ltd | Construction | 2025 |
| NPT Homes Limited | Real estate | 2017 |
| NS Techno Limited | Wholesale & retail | 2024 |
| NSE & W Developments Ltd | Construction | 2020 |
| NSE & W Living Ltd | Real estate | 2020 |
| NSE & W Properties Ltd | Real estate | 2020 |
| Nsgb Group Limited | Households | 2022 |
| Nsrj Investments Ltd | Real estate | 2019 |
| NT Groundworks Limited | Construction | 2008 |
| NTE Roofing Services Limited | Construction | 2024 |