| Novelo Limited | Information & communication | 2023 |
| Noverre House Management Company Limited | Households | 1999 |
| Novi Constructions Limited | Construction | 2006 |
| Noviachp Limited | Energy | 2015 |
| Novo Farina Limited | Manufacturing | 2016 |
| Novoseum Ltd | Professional & scientific | 2024 |
| Novus Accountancy Ltd | Professional & scientific | 2019 |
| Nowbond Limited | Real estate | 1992 |
| Nowco Limited | Administrative & support | 2019 |
| Nowlan Data Services Ltd | Information & communication | 2026 |
| Nowruz Enterprises Limited | Wholesale & retail | 2022 |
| Noys Limited | Information & communication | 2014 |
| NP Catering Ltd | Hospitality | 2022 |
| NP Security Solutions Ltd | Administrative & support | 2011 |
| NPB Commercial Projects Limited | Construction | 2026 |
| NPB Properties Ltd | Real estate | 2022 |
| NPD Brickwork Ltd | Construction | 2022 |
| NPD Decorators Limited | Construction | 2026 |
| NPF Properties Limited | Real estate | 2022 |
| Nph&L Ltd | Real estate | 2025 |
| NPL Consulting Limited | Health & social care | 2019 |
| NPM Projects Ltd | Professional & scientific | 2013 |
| NPS Barnsley Limited | Professional & scientific | 2010 |
| NPS Humber Limited | Professional & scientific | 2008 |
| NPS Leeds Limited | Professional & scientific | 2011 |
| NPS Newport Limited | Professional & scientific | 2014 |
| NPS North West Limited | Professional & scientific | 2004 |
| NPS Norwich Limited | Professional & scientific | 2011 |
| NPS NW Limited | Professional & scientific | 2019 |
| NPS Peterborough Limited | Professional & scientific | 2016 |
| NPS Property Consultants Limited | Professional & scientific | 1994 |
| NPS South East Limited | Professional & scientific | 2008 |
| NPS South West Limited | Professional & scientific | 2007 |
| NPS Stockport Limited | Extraterritorial | 2006 |
| NR Autopoint Limited | Wholesale & retail | 2024 |
| NR Care Holdings Limited | Real estate | 2017 |
| NR Care Ltd | Administrative & support | 2012 |
| NR Designs Ltd | Wholesale & retail | 2018 |
| NR Heating and Bathrooms Ltd | Construction | 2025 |
| NR Homes (Norfolk) Limited | Construction | 2017 |
| NR Recruitment Ltd | Administrative & support | 2019 |
| NR Roofing Specialists Ltd | Construction | 2023 |
| NR Surveyors Ltd | Professional & scientific | 2025 |
| NR Traders Ltd | Wholesale & retail | 2024 |
| NR Transfers Ltd | Transport & logistics | 2023 |
| NR1 4AJ Management Co. Ltd. | Households | 2017 |
| NR1 Accountancy Ltd | Professional & scientific | 2013 |
| NR1 Business Centre Ltd | Administrative & support | 2022 |
| NR1 Properties Limited | Real estate | 2019 |
| NR1 Taxis Ltd | Transport & logistics | 2023 |
| NR12 Fitness Gym & Studio Limited | Arts & recreation | 2020 |
| NR2 Bars Ltd | Manufacturing | 2019 |
| NR2 Dental Studio Ltd | Health & social care | 2019 |
| NR2 PT Ltd | Arts & recreation | 2026 |
| NR29 Guide Ltd | Information & communication | 2019 |
| NR3 Access Ltd | Construction | 2019 |
| NR3 Independent Ltd | Hospitality | 2020 |
| NR30 2DG Limited | Real estate | 2017 |
| NR4 Developments Ltd | Real estate | 2023 |
| NR6 Cycles Ltd | Wholesale & retail | 2020 |
| NR6 Limited | Construction | 2010 |
| Nrdflk Ltd | Hospitality | 2026 |
| NRG Developers Limited | | 2007 |
| Nrhandyservices Ltd | Construction | 2026 |
| Nrit Recruitment Limited | Administrative & support | 2006 |
| Nrlh Holding Company Limited | Financial services | 2020 |
| NRM Managing Agents Limited | Real estate | 2025 |
| NRM Property Maintenance Limited | Administrative & support | 2025 |
| NRN (UK) Limited | Professional & scientific | 2007 |
| NRP Car Parking Limited | Transport & logistics | 2017 |
| NRZ Services Ltd | Hospitality | 2025 |
| NS Bioanalytical Consulting Ltd | Professional & scientific | 2023 |
| NS Design 7 Studio Ltd | Professional & scientific | 2025 |
| NS70 Limited | Administrative & support | 2019 |
| NSA Anaesthesia Limited | Health & social care | 2015 |
| Nsba Ltd | Professional & scientific | 1996 |
| NSC Electrical Ltd | Construction | 2026 |
| NSK Meal Prep Ltd | Hospitality | 2022 |
| NSM Developments Norfolk Ltd | Construction | 2025 |
| NSS Holdings East Anglia Ltd | Financial services | 2020 |
| Ntek Beverley Limited | Hospitality | 2019 |
| Ntelligence Ltd | Information & communication | 2019 |
| NTO Building Services Ltd | Construction | 2016 |
| NTS Services Norwich Limited | Financial services | 2016 |
| Ntss Ltd | Administrative & support | 2014 |
| NU Centrale RTM Company Limited | Households | 2012 |
| NU Image Design Ltd | Professional & scientific | 2014 |
| NU Seating Ltd | Other services | 2017 |
| NU Vision Home Improvements Ltd | Construction | 2024 |
| NU YOU Filler Suppliers Limited | Wholesale & retail | 2020 |
| Nu-Faze Construction Ltd | Construction | 2023 |
| Nudd Holdings Limited | Financial services | 2020 |
| Nude Beauty Limited | Health & social care | 2020 |
| Nullam Financial Ltd | Professional & scientific | 2021 |
| Nullam Real Estate Ltd | Real estate | 2022 |
| Numantia Limited | Professional & scientific | 2018 |
| Numbat Ltd | Manufacturing | 2021 |
| Number 14 Ltd | Hospitality | 2014 |
| Number 23 - the Academy Ltd | Education | 2018 |
| Number 6 Don'T LET HIM Turn Ltd | Extraterritorial | 2022 |