| Mystical Rose | Other services | 2008 |
| Nails by Steve Limited | Other services | 2019 |
| NAR Valley Farms Limited | Agriculture & fishing | 2009 |
| NAT PAL Limited | Manufacturing | 1994 |
| Natures Grub Limited | Manufacturing | 2015 |
| Navigate Compliance Limited | Administrative & support | 2021 |
| Nelson's Coffee Shop Limited | Hospitality | 2002 |
| Nest Security Ltd | Construction | 2021 |
| New Galaxy World Limited | Hospitality | 2017 |
| New Wave Plumbing & Heating Limited | Construction | 2005 |
| Nightjar Vintage Limited | Other services | 2025 |
| NK Childcare Limited | Education | 2016 |
| Nklp Limited | Wholesale & retail | 2014 |
| NMLONDONRETAIL1 Limited | Administrative & support | 2024 |
| Nnbj Ltd | Administrative & support | 2015 |
| NOD Butcher & SON Ltd | Construction | 2015 |
| Noisecanvas Limited | Extraterritorial | 2009 |
| Norfolk Alarms Limited | Administrative & support | 2020 |
| Norfolk Campers Ltd | Administrative & support | 2019 |
| Norfolk Classic Cars and Memorabilia Ltd | Wholesale & retail | 2018 |
| Norfolk Clearance Limited | Water & waste | 2026 |
| Norfolk Decorative Antiques Limited | Wholesale & retail | 2007 |
| Norfolk Electric Bikes Ltd | Administrative & support | 2018 |
| Norfolk Fire Protection (UK) Limited | Other services | 2019 |
| Norfolk Green Energy Limited | Extraterritorial | 2011 |
| Norfolk Green Management Ltd | Professional & scientific | 2024 |
| Norfolk Green Waste Ltd | Water & waste | 2024 |
| Norfolk Home Solutions Limited | Wholesale & retail | 2012 |
| Norfolk Housekeeper Limited | Administrative & support | 2023 |
| Norfolk Pheasant Limited | Administrative & support | 2010 |
| Norfolk Plaster Mouldings Ltd | Construction | 2026 |
| Norfolk Plumbing & Heating Solutions Ltd | Construction | 2021 |
| Norfolk Property and Home Solutions Ltd | Construction | 2024 |
| Norfolk Quail Limited | Extraterritorial | 2012 |
| Norfolk Roots Living Limited | Wholesale & retail | 2024 |
| Norfolk Roots Property Limited | Real estate | 2008 |
| Norfolk Sealants Ltd | Construction | 2022 |
| Norfolk Storage Limited | Extraterritorial | 2024 |
| Norfolk Superhero Challenge Limited | Arts & recreation | 2021 |
| Norfolk Tree Services Limited | Agriculture & fishing | 2012 |
| Norfolk's Natural Dog Store Ltd | Wholesale & retail | 2023 |
| Norfolk-Hampers Limited | Wholesale & retail | 2022 |
| Norfolkgeoconsult Limited | Information & communication | 2020 |
| Norfolks Little Cleaning Company Limited | Administrative & support | 2024 |
| North Norfolk 1 PCN Ltd | Health & social care | 2023 |
| North Norfolk Blinds & Carpets Ltd | Wholesale & retail | 2019 |
| North Norfolk Building Company Ltd | Construction | 2018 |
| North Norfolk Coastal Farmers Group Ltd | Other services | 2024 |
| North Norfolk Electrical Contractors Limited | Extraterritorial | 2011 |
| North Norfolk Embroidery Ltd | Manufacturing | 2021 |
| North Norfolk Engineering Limited | Professional & scientific | 2013 |
| North Norfolk Gardeners Limited | Administrative & support | 2025 |
| North Norfolk Glamping Ltd | Hospitality | 2019 |
| North Norfolk Glass Ltd | Construction | 2026 |
| North Norfolk Hotels Ltd | Hospitality | 2021 |
| North Norfolk Mangoes Ltd | Real estate | 2014 |
| North Norfolk Osteopaths Limited | Health & social care | 2017 |
| North Norfolk Paint & Body Limited | Wholesale & retail | 2023 |
| North Norfolk Sinfonia Productions Ltd | Arts & recreation | 2024 |
| North Norfolk Tomatoes LLP | | 2014 |
| Northshore Partners Ltd | Professional & scientific | 2026 |
| Northshore Place Management Limited | Households | 2018 |
| Novelty Estates (UK) Limited | Extraterritorial | 2014 |
| NWG Property Holdings Limited | Financial services | 2018 |
| NWS Decks Ltd | Administrative & support | 2022 |
| O Street Norfolk Ltd | Administrative & support | 2019 |
| Oak Cottage Associates Limited | Real estate | 1995 |
| Oakham Lets Limited | Real estate | 2024 |
| Oceanskies (UK) Limited | Administrative & support | 2013 |
| Oceanskies Support Services Limited | Administrative & support | 2022 |
| OIL Distributors Limited | Wholesale & retail | 2023 |
| Old Alliance Hospitality Ltd | Hospitality | 2024 |
| Old Hall Farm Holidays Ltd | Real estate | 2022 |
| Olive Fisher Court Management Company Limited | Households | 2010 |
| Olivia Close (Fakenham) Management Limited | Other services | 2008 |
| Onyx K9 Ltd | Wholesale & retail | 2024 |
| Origin Guiding Limited | Administrative & support | 2024 |
| Origin Power Services Ltd | Construction | 2015 |
| Oriole Birding Limited | Administrative & support | 2014 |
| Ortus Education Limited | Education | 2023 |
| Ova-Jmr Lighting LLP | | 2008 |
| OWL Tree Developments Ltd | Construction | 2019 |
| Oxford Meadows Ltd | Real estate | 2023 |
| P & S Butchers Limited | Wholesale & retail | 2003 |
| P&S Synergy Ltd | Mining & quarrying | 2025 |
| P4 Limited | Manufacturing | 1989 |
| Painted Red Limited | Information & communication | 2003 |
| Park Avenue Property Management Limited | Households | 2021 |
| Parkhill Cloud Ltd | Information & communication | 2024 |
| Paul Coaching Limited | Professional & scientific | 2020 |
| Paul Towers Plumbing and Heating Ltd | Construction | 2020 |
| Paulcoach Limited | Professional & scientific | 2020 |
| PAX Projects Ltd | Financial services | 2025 |
| Payne Crop Nutrition Limited | Manufacturing | 2016 |
| Peaceful Pets Limited | Professional & scientific | 2001 |
| Pearl River Fakenham Ltd | Hospitality | 2012 |
| Perfectly Pure Cleaning Services Ltd | Administrative & support | 2021 |
| Pete Naylor Productions Ltd | Information & communication | 2023 |
| PG Repairs Limited | Manufacturing | 2018 |
| Phillip Woodhouse Limited | Professional & scientific | 2001 |