| New-Con (Yorkshire) Ltd | Construction | 2023 |
| Newbeg Ltd | Wholesale & retail | 2023 |
| Newbridge Capital Bath Ltd | Information & communication | 2024 |
| Newbury Construction Services Limited | Construction | 2021 |
| Newdon Care Services Limited | Health & social care | 2013 |
| Newdon Catering Ltd | Hospitality | 2025 |
| Newdon Health Care Limited | Health & social care | 2019 |
| Newex Limited | Professional & scientific | 2017 |
| Newgen Roofing and Landscaping Ltd | Construction | 2025 |
| Newhog Holdings Limited | Professional & scientific | 2018 |
| Newington Engineering Limited | Construction | 2026 |
| Newkitchendoors Limited | Extraterritorial | 2016 |
| Newland Group SY Ltd | Wholesale & retail | 2025 |
| Newline Roofing and Fascias Ltd | Construction | 2024 |
| Newmans FIX IT Fast Limited | Wholesale & retail | 2025 |
| Newmart Cooling Ltd | Construction | 2024 |
| Newmart Holdings Ltd | Financial services | 2025 |
| Newrate Limited | Other services | 2013 |
| Newsham & Jenkins Limited | Financial services | 2018 |
| Newton Arms Ltd | Hospitality | 2020 |
| Newton Dynasty Holdings Limited | Financial services | 2020 |
| Newton Property Investments (Doncaster) Limited | Households | 2017 |
| Newton Property Maintenance Ltd | Households | 2014 |
| Newview Home Improvements Ltd | Construction | 2022 |
| Nexa Advertising Ltd | Information & communication | 2025 |
| Nexa Business AI Ltd | Information & communication | 2025 |
| Nexa Engineering Consultancy Ltd | Professional & scientific | 2014 |
| Nexa Proteam Ltd | Information & communication | 2026 |
| Nexa Solve AI Limited | Information & communication | 2026 |
| Nexa Studio AI Ltd | Information & communication | 2025 |
| Nexacloud Technologies Ltd | Extraterritorial | 2026 |
| Nexacore Group Ltd | Transport & logistics | 2026 |
| Nexalya Ltd | Wholesale & retail | 2026 |
| Nexgenbrokers Ltd | Financial services | 2024 |
| Nexora Fieldworks Ltd | Extraterritorial | 2026 |
| Nexovate Trading Ltd | Wholesale & retail | 2025 |
| Nexpress Courier Ltd | Transport & logistics | 2026 |
| Nexscale Digital Ltd | Information & communication | 2025 |
| Nexsys Tech Limited | Information & communication | 2026 |
| Next Automotive Ltd | Wholesale & retail | 2022 |
| Next Gear International Limited | Wholesale & retail | 2023 |
| Next GEN Arts Ltd | Arts & recreation | 2020 |
| Next Level Safety Ltd | Education | 2025 |
| Next Level Spirit Ltd | Extraterritorial | 2022 |
| Next Stage Brands Ltd | Professional & scientific | 2025 |
| Next Stage Dancewear Ltd | Wholesale & retail | 2025 |
| Next Step HR Ltd | Administrative & support | 2010 |
| Next Year's Model Limited | Arts & recreation | 2011 |
| Nextclaud Limited | Information & communication | 2026 |
| Nextdoor Health Ltd | Extraterritorial | 2025 |
| Nextgen Active Ltd | Wholesale & retail | 2026 |
| Nextgen Heritage Hub Limited | Administrative & support | 2025 |
| Nextgen Traffic Limited | Construction | 2024 |
| Nextora Trading and Supplies Ltd | Extraterritorial | 2026 |
| Nextorial Limited | Manufacturing | 2025 |
| Nexus Building Ltd | Construction | 2024 |
| Nexus Capital Investments Ltd | Financial services | 2025 |
| Nexus Corporate Solutions Limited | Financial services | 2023 |
| Nexus Hub Ltd | Professional & scientific | 2024 |
| Nexus Strength and Wellbeing Ltd | Arts & recreation | 2024 |
| Nexus Works Ltd | Information & communication | 2018 |
| Nezumi Holdings Ltd | Financial services | 2022 |
| Nezumi Properties Ltd | Real estate | 2021 |
| NF Fleet Care Ltd | Wholesale & retail | 2025 |
| Nfcp Holding Limited | Financial services | 2018 |
| NFH Services Limited | Professional & scientific | 2022 |
| NFM TM Ltd | Construction | 2025 |
| Nfpar Limited | Health & social care | 2023 |
| NFT Trans Ltd | Transport & logistics | 2019 |
| NG Quality Inspection Services Ltd. | Professional & scientific | 2013 |
| NG Trading & Marketing Group Ltd | Other services | 2012 |
| NGF Projects Limited | Construction | 2016 |
| NGM Trans Ltd | Transport & logistics | 2019 |
| NGS Travel Limited | Transport & logistics | 2019 |
| NGV Trans Limited | Transport & logistics | 2017 |
| NHC Trading Limited | Administrative & support | 1998 |
| NHD Tattoo Ltd | Wholesale & retail | 2025 |
| NHN Holdings Limited | Professional & scientific | 2015 |
| Nhung Nails Bar and Spa Ltd | Other services | 2023 |
| NI HAO Takeaway (Doncaster) Ltd | Hospitality | 2019 |
| Niaz Off-Licence Limited | Wholesale & retail | 2025 |
| Nica Sales and Construct Limited | Manufacturing | 2022 |
| Nicco Ltd | Real estate | 2024 |
| Nice One TM Ltd | Construction | 2015 |
| Niche Autos Service & MOT Centre Wakefield Ltd | Wholesale & retail | 2023 |
| Niche Emporium Ltd | Manufacturing | 2014 |
| Niche Health and Wellbeing Ltd | Other services | 2024 |
| Niche Landscapes Limited | Administrative & support | 2020 |
| Niche Leisure Ltd | Real estate | 2021 |
| Niche Roofing Ltd | Construction | 2020 |
| Niche Tiles UK Ltd | Construction | 2024 |
| Nicholsons Property Ltd | Real estate | 2022 |
| Nick Aldridge Films Limited | Arts & recreation | 2019 |
| Nick Andrews Sign Language Limited | Other services | 2009 |
| Nick Bridgwater Ceilings & Partitions Specialist Limited | Construction | 2016 |
| Nick Cave Electrical Ltd | Manufacturing | 2014 |
| Nick Davies Rigging Limited | Information & communication | 2013 |
| Nick Maskey and SON Limited | Construction | 2015 |
| Nick Maskey Joinery Limited | Construction | 2007 |
| Nick Troth Fire Engineering Ltd | Professional & scientific | 2025 |