| NO 1 Buyer Ltd | Wholesale & retail | 2017 |
| NO1PLUS Ltd | Wholesale & retail | 2019 |
| Norcutt Mortgages Limited | Financial services | 2021 |
| Norfolk and Better Ltd | Manufacturing | 2021 |
| Norfolk Building Contractors Ltd | Construction | 2019 |
| Norfolk Colonial Homes Limited | Construction | 2002 |
| Norfolk Countryside Care Ltd | Administrative & support | 2009 |
| Norfolk Horizon Holdings Ltd | Financial services | 2024 |
| Norfolk Industrial Cleaning Limited | Administrative & support | 2014 |
| Norfolk Landscaping and Treatment Tanks Ltd | Water & waste | 2025 |
| Norfolk Plant & Machinery Ltd | Wholesale & retail | 2016 |
| Norfolk Renovation & Build Ltd | Construction | 2026 |
| Norfolk Smoke PIT Ltd | Manufacturing | 2021 |
| Norfolk Spore Ltd. | Agriculture & fishing | 2023 |
| Norfolk Sports and Performance Cars Limited | Wholesale & retail | 2019 |
| Norfolk Surfacing Ltd | Construction | 2022 |
| Norfolk Treatment Tanks Ltd | Water & waste | 2024 |
| Norfolkhouseevents Ltd | Administrative & support | 2026 |
| Nova Farming Ltd | Agriculture & fishing | 2014 |
| Nova Millennium Properties Ltd | Real estate | 2026 |
| Noxavellion Ltd | Wholesale & retail | 2025 |
| NR1 Engineering Ltd | Professional & scientific | 2026 |
| Nssignals Ltd | Construction | 2023 |
| O Boteco Ltd | Wholesale & retail | 2026 |
| O W Wortley & Sons (Estates) Ltd | Financial services | 2023 |
| O W Wortley & Sons Property Holdings Limited | Financial services | 2021 |
| O'Brien Bathrooms Limited | Construction | 2025 |
| Oakdale Construction and Maintenance Ltd | Construction | 2008 |
| Oakley Way (Outwell) Management Company NO2 Limited | Households | 2024 |
| Occra Limited | Wholesale & retail | 2017 |
| Oddfellows Hall (Tenant) Limited | Extraterritorial | 2020 |
| Ohana Property Developments Ltd | Real estate | 2023 |
| Old School Green Management Company Limited | Households | 2001 |
| Olde Mill Upwell Management Company Limited | Real estate | 2012 |
| Olex Motors Ltd | Wholesale & retail | 2025 |
| Omar Graphics Design Limited | Professional & scientific | 2025 |
| One Stop PIT Bikes Ltd. | Manufacturing | 2018 |
| Onefish Twofish Limited | Professional & scientific | 2005 |
| Only Outdoors Ltd | Wholesale & retail | 2025 |
| Onyx Facility Service Ltd | Professional & scientific | 2021 |
| Oozecode Ltd | Information & communication | 2018 |
| Opex Diamond Minds Ltd | Professional & scientific | 2021 |
| Opportunity Africa Ltd | Professional & scientific | 2012 |
| Optimise Asset Protection Limited | Administrative & support | 2015 |
| Orchid Group Holdings Ltd | Construction | 2025 |
| Ormc Property Ltd | Real estate | 2021 |
| Ortumex Systems Ltd | Manufacturing | 2020 |
| Otto Holiday Club Ltd | Information & communication | 2024 |
| Overland (Vehicle Services) Limited | Wholesale & retail | 2004 |
| OZI 58 Limited | Hospitality | 2020 |
| P & R Hickman Ltd | Construction | 2013 |
| P R Crane Civil Engineering Limited | Construction | 2007 |
| P&D Rental Properties Ltd | Real estate | 2026 |
| P. J. Slapp Limited | Administrative & support | 1981 |
| P. Payne & SON (Farmers) Limited | Agriculture & fishing | 1958 |
| PA Estates (EN) Ltd | Real estate | 2022 |
| Panda Domestics Ltd | Manufacturing | 2024 |
| Panther Estates LLP | | 2025 |
| Paper Convertec Limited | Other services | 2014 |
| Paratus Electrical Limited | Construction | 2024 |
| Pardot Barton Properties Limited | Real estate | 2004 |
| Parintele Ltd | Transport & logistics | 2025 |
| Parker Property Solutions Limited | Real estate | 2025 |
| Parkes Products Limited | Manufacturing | 1985 |
| Pasture Best Ltd | Agriculture & fishing | 2023 |
| Patkar Ltd | Wholesale & retail | 2025 |
| Patrick Janssens Limited | Wholesale & retail | 2012 |
| Patrick Janssens Racing Limited | Arts & recreation | 2013 |
| Paul Cross Leisure Limited | Hospitality | 1978 |
| Paul Harris Productions Limited | Arts & recreation | 2011 |
| Paul T Sancho Autos Limited | Wholesale & retail | 2021 |
| Paul-Gabriel-Care Ltd | Construction | 2023 |
| Paulcyone International Ltd | Administrative & support | 2024 |
| PD Furniture Ltd | Wholesale & retail | 2023 |
| Pearsons Capital Projects Limited | Real estate | 2008 |
| Pearsons Capital Securities Limited | Real estate | 1999 |
| Pearsons Environmental Limited | Extraterritorial | 2014 |
| Peddars Property Limited | Households | 2026 |
| Peerless Plastics and Coatings Limited | Manufacturing | 2009 |
| Pegasus Profiles (Southern) Limited | Manufacturing | 1982 |
| Pegasus Profiles (UK) Limited | Manufacturing | 2013 |
| Pegasus Profiles Limited | Manufacturing | 1967 |
| Perfect Paws Norfolk Ltd | Other services | 2025 |
| Pergega Plumbing & Heating Ltd | Construction | 2015 |
| Perry & ME Ltd | Wholesale & retail | 2024 |
| Pete Scott Ltd | Professional & scientific | 2014 |
| Peter Conoley & SON Watton Goldsmiths Limited | Wholesale & retail | 2009 |
| Pettit Property Co Ltd | Financial services | 2018 |
| Pezhon Ltd | Wholesale & retail | 2019 |
| PFG Auto Repair Ltd | Wholesale & retail | 2026 |
| PG & AJ Jarvis Limited | Agriculture & fishing | 2003 |
| PGM Medical Ltd | Health & social care | 2022 |
| Phil Weedon Photography Ltd | Professional & scientific | 2014 |
| Philip Quantrill (Structural Engineers) Limited | Wholesale & retail | 1970 |
| Phoenix House Takeaway Ltd | Hospitality | 2025 |
| Pikom Ltd | Manufacturing | 2020 |
| Pine Close Ltd | Hospitality | 2022 |
| Pink Pound Marketing Limited | Professional & scientific | 2014 |
| Pipitech Consultancy Limited | Information & communication | 2013 |
| Pizza Star OK Ltd | Hospitality | 2025 |