| New Healing Solutions Clinic Limited | Health & social care | 2024 |
| New Hope Elderly Day Care Ltd | Health & social care | 2020 |
| New Horizons Trust South Yorkshire | Real estate | 2005 |
| New Light Invest Ltd | Transport & logistics | 2023 |
| New Milanos Ltd | Hospitality | 2024 |
| New Ocean Bites Ltd | Hospitality | 2025 |
| New Options Community Fitness C.I.C. | Arts & recreation | 2011 |
| New Orient Express UK Ltd | Hospitality | 2024 |
| New Outlook Ltd | Professional & scientific | 2019 |
| New Premier Carpets and Vinyls Limited | Wholesale & retail | 2021 |
| New Premier Wholesale Limited | Wholesale & retail | 2022 |
| New Site Finders Limited | Real estate | 2015 |
| New Street Fish Bar Ltd | Hospitality | 2025 |
| New Waterton Park Limited | Real estate | 2003 |
| New West Solutions Ltd | Information & communication | 2019 |
| Newco C Limited | Professional & scientific | 2024 |
| Newco Developments (South Yorkshire) Limited | Professional & scientific | 2014 |
| Newcroft 58 | Financial services | 2016 |
| Newdawn PUB Co Limited | Hospitality | 2018 |
| Newhall Developments Limited | Real estate | 2021 |
| Newhall Transport Services Limited | Transport & logistics | 2014 |
| Newleaf Holdings LLP | | 2015 |
| Newlife Yoga & Wellness Ltd | Health & social care | 2023 |
| Newman Group Ltd | Construction | 2022 |
| Newsome’S Tavern Ltd | Hospitality | 2022 |
| Newsys Solutions Ltd | Information & communication | 2016 |
| Newtec Repair and Refinishing Limited | Wholesale & retail | 2020 |
| Newton Ecommerce Ltd | Wholesale & retail | 2025 |
| Newtown Property Developments Limited | Construction | 2023 |
| Nexara Group Ltd | Professional & scientific | 2024 |
| Nexara MA Ltd | Education | 2018 |
| Nexdev Consulting Ltd | Information & communication | 2026 |
| Next Chapter Property Ltd | Real estate | 2019 |
| Next GEN Commercials Ltd | Wholesale & retail | 2019 |
| Next GEN Glazing Ltd | Manufacturing | 2012 |
| Next GEN Sports & Entertainment Limited | Arts & recreation | 2017 |
| Next Step Asset Finance Ltd | Financial services | 2019 |
| Nextgen Force Ltd | Transport & logistics | 2025 |
| Nextgen Rentals Ltd | Administrative & support | 2023 |
| Nextmove Logistics&Freight Ltd | Wholesale & retail | 2025 |
| Nexus Integration Solutions Limited | Administrative & support | 2023 |
| NFS Taxi Ltd | Transport & logistics | 2023 |
| NG Estates Ltd | Real estate | 2009 |
| Ngahan's Ltd | Transport & logistics | 2021 |
| NGC1 Consultancy Limited | Professional & scientific | 2026 |
| NGC1 Limited | Financial services | 2025 |
| NGU Professional Limited | Professional & scientific | 2024 |
| NGW (Barnsley) Property Ltd | Financial services | 2025 |
| Ngyere Property Lettings Ltd | Real estate | 2022 |
| NHI Properties Ltd | Real estate | 2020 |
| NHI Retail Ltd | Wholesale & retail | 2020 |
| Nibbles Events Ltd | Hospitality | 2019 |
| Nibosak Ltd | Health & social care | 2019 |
| Nicholson Haulage Limited | Transport & logistics | 2024 |
| Nicholson Structures Limited | Manufacturing | 2024 |
| Nicholson Utilities Ltd | Construction | 2012 |
| Nick Jones Transport Limited | Transport & logistics | 2017 |
| Nickwilsondefence Limited | Public administration | 2023 |
| Nicola Johnson Occupational Therapy Ltd | Health & social care | 2020 |
| Nield on Demand Limited | Wholesale & retail | 2008 |
| Nifty FOX Creative Ltd | Professional & scientific | 2019 |
| Nifty FOX Holdings Limited | Financial services | 2024 |
| Nightingales (Doncaster) Management Company Limited | Households | 2021 |
| Nightingales Healthcare Limited | Health & social care | 2019 |
| NIK Owen Transport Ltd | Transport & logistics | 2023 |
| Nika George Limited | Hospitality | 2019 |
| Nikmet Ltd | Water & waste | 2025 |
| Nikolas 2018 Ltd | Wholesale & retail | 2020 |
| Nikostar Limited | Wholesale & retail | 2026 |
| Nimrod Environmental Limited | Construction | 2007 |
| Nine Arch Limited | Real estate | 2025 |
| Nino's Pizza Ltd | Hospitality | 2019 |
| Ninth Wave Software Limited | Information & communication | 2007 |
| Nirvana Corporation Ltd | Wholesale & retail | 2024 |
| Nithu MFC Fried Chicken Ltd | Hospitality | 2021 |
| Nivalis-Tech Limited | Professional & scientific | 2021 |
| Nixey Properties Limited | Real estate | 2025 |
| NKD Group Limited | Wholesale & retail | 2019 |
| NKW Developments Limited | Real estate | 2025 |
| NL Joinery Ltd | Construction | 2021 |
| NM Lets Ltd | Real estate | 2025 |
| NM Metal Processing Ltd | Wholesale & retail | 2026 |
| NM Metal Recycling Ltd | Water & waste | 2020 |
| NML Armoury Ltd | Wholesale & retail | 2024 |
| NML Events and Training Ltd | Arts & recreation | 2025 |
| NML Retail Ltd | Wholesale & retail | 2025 |
| Nmtf Ltd | Other services | 2015 |
| NNH Project Solutions Ltd | Information & communication | 2025 |
| NO SIX Business Consultancy Ltd | Professional & scientific | 2021 |
| NO. 14 Thai Cafe Ltd | Hospitality | 2026 |
| NO. 37 Sandwich & Coffee Corner Ltd | Hospitality | 2025 |
| Noah's ARK Pet Rescue Limited | Professional & scientific | 2020 |
| Noble JS Ltd | Wholesale & retail | 2014 |
| Noble Warrior Ltd | Professional & scientific | 2025 |
| Noblethorpe Hall Ltd | Hospitality | 2024 |
| Nodonagoya Limited | Hospitality | 2026 |
| Nogers Skip Hire Ltd | Water & waste | 2023 |
| Noiré Coffee & Cocktails Ltd | Hospitality | 2025 |
| Nomadic Media Ltd | Professional & scientific | 2012 |
| Norham Plastics Limited | Manufacturing | 2007 |