| Norcon Events Limited | Hospitality | 2015 |
| Nordev Ltd | Information & communication | 2023 |
| Nordic Venture Development Ltd | Administrative & support | 2021 |
| Nordica UK Limited | Wholesale & retail | 2010 |
| Nordwell Ltd | Construction | 2003 |
| Norfire Ltd | Extraterritorial | 2025 |
| Norflower Ltd | Arts & recreation | 2025 |
| Norfolk & Norwich Festival Limited | Hospitality | 2015 |
| Norfolk & Norwich Indoor Bowling Club Limited | Arts & recreation | 1966 |
| Norfolk & Suffolk Aggregates Limited | Water & waste | 2023 |
| Norfolk & Suffolk Care Support Limited | Other services | 2002 |
| Norfolk & Suffolk Construction Limited | Construction | 2010 |
| Norfolk & Suffolk Cyber Security Cluster. CIC | Other services | 2019 |
| Norfolk & Suffolk Plant Limited | Construction | 2014 |
| Norfolk 3D Printing Ltd | Manufacturing | 2025 |
| Norfolk 4X4 Limited | Extraterritorial | 2001 |
| Norfolk Accountancy Ltd | Professional & scientific | 2005 |
| Norfolk Accountancy Services Ltd | Professional & scientific | 2020 |
| Norfolk Affinity Care Services Ltd. | Health & social care | 2020 |
| Norfolk Agri Limited | Manufacturing | 2004 |
| Norfolk Air Conditioning Ltd | Construction | 2025 |
| Norfolk and Norwich Architecture Limited | Professional & scientific | 2004 |
| Norfolk and Norwich Biomedical Research Campus Limited | Professional & scientific | 2025 |
| Norfolk and Norwich Law Society | Other services | 1892 |
| Norfolk and Norwich Property Company Limited | Financial services | 2024 |
| Norfolk and Norwich Science Park Limited | Professional & scientific | 2011 |
| Norfolk and Norwich Send Association Ltd | Health & social care | 1993 |
| Norfolk and Suffolk Services Limited | Construction | 2012 |
| Norfolk Angels CIC | Administrative & support | 2022 |
| Norfolk Antique & Reclamation Centre Limited | Wholesale & retail | 2015 |
| Norfolk Bait Rolling Services Ltd | Agriculture & fishing | 2023 |
| Norfolk Barn Restorations Ltd | Real estate | 2015 |
| Norfolk Barn Specialists Ltd | Construction | 2015 |
| Norfolk Barns Limited | Construction | 2013 |
| Norfolk Bathrooms and Boilers Ltd | Construction | 2026 |
| Norfolk Bearings Ltd | Wholesale & retail | 2010 |
| Norfolk Beekeeping Equipment Limited | Wholesale & retail | 2023 |
| Norfolk Bells Limited | Hospitality | 2024 |
| Norfolk Bespoke Construction Limited | Construction | 2019 |
| Norfolk Bespoke Homes Limited | Construction | 2022 |
| Norfolk Biomechanics Clinic Ltd | Health & social care | 2011 |
| Norfolk Boats Limited | Wholesale & retail | 2018 |
| Norfolk Boiler Services Limited | Construction | 2004 |
| Norfolk Brake and Clutch Specialists Limited | Wholesale & retail | 2003 |
| Norfolk Brickwork & Build Ltd | Construction | 2026 |
| Norfolk British Muslim Association Ltd | Health & social care | 2022 |
| Norfolk Broads Brewing LLP | | 2005 |
| Norfolk Broads Construction Services Ltd | Construction | 2024 |
| Norfolk Broads Exteriors Limited | Construction | 2015 |
| Norfolk Broads Fencing and Ladscaping Ltd | Administrative & support | 2025 |
| Norfolk Broads Recovery Services Ltd | Administrative & support | 2009 |
| Norfolk Broads Yacht Club Limited | Arts & recreation | 2021 |
| Norfolk Building & Property Services Ltd | Administrative & support | 2026 |
| Norfolk Building Group Ltd | Construction | 2023 |
| Norfolk Building Ltd | Construction | 2024 |
| Norfolk Business Consultants Ltd | Professional & scientific | 2012 |
| Norfolk Business Consulting Ltd | Information & communication | 2015 |
| Norfolk Business Projects 3 Limited | Extraterritorial | 2024 |
| Norfolk Business Support Ltd | Professional & scientific | 2016 |
| Norfolk Cafes Ltd | Hospitality | 2021 |
| Norfolk Camping Holidays Ltd | Hospitality | 2025 |
| Norfolk Capacitors Limited | Manufacturing | 2019 |
| Norfolk Capital Group Limited | Financial services | 2015 |
| Norfolk Capital Management Services Limited | Professional & scientific | 2012 |
| Norfolk Care Association Ltd | Other services | 2020 |
| Norfolk Carpentry & Property Ltd | Manufacturing | 2020 |
| Norfolk Carpentry and Renovations Ltd | Manufacturing | 2025 |
| Norfolk Carpentry Contractors Limited | Manufacturing | 2024 |
| Norfolk Carpentry Service Ltd | Manufacturing | 2024 |
| Norfolk Carpet Fitting Limited | Wholesale & retail | 2015 |
| Norfolk Cart Lodges Limited | Construction | 2016 |
| Norfolk Cart Sheds Limited | Extraterritorial | 2015 |
| Norfolk Catering Limited | Hospitality | 2019 |
| Norfolk Cement & Building Supplies Limited | Wholesale & retail | 2016 |
| Norfolk Chambers of Commerce | Other services | 1896 |
| Norfolk Chartering and Shipping Limited | Transport & logistics | 1998 |
| Norfolk Child and Adolescent Psychotherapy Services Ltd | Health & social care | 2020 |
| Norfolk Children's Book Centre Ltd | Wholesale & retail | 2025 |
| Norfolk Chiro Group Holdings Ltd | Financial services | 2022 |
| Norfolk Christmas Trees Limited | Professional & scientific | 2000 |
| Norfolk Citizens Advice | Health & social care | 1998 |
| Norfolk Civil Ltd | Construction | 2022 |
| Norfolk Clean & Shine Ltd | Administrative & support | 2026 |
| Norfolk Cleaning Contractors Ltd | Administrative & support | 2025 |
| Norfolk Cleaning Services Ltd | Extraterritorial | 2024 |
| Norfolk Cleans Ltd | Administrative & support | 2023 |
| Norfolk CMS Limited | Financial services | 2024 |
| Norfolk Coachways Limited | Transport & logistics | 2014 |
| Norfolk Coalition of Disabled People | Health & social care | 2000 |
| Norfolk Coastal Cleaners Limited | Households | 2017 |
| Norfolk Coastal Properties Ltd | Real estate | 2025 |
| Norfolk Community Arts Limited | Education | 2001 |
| Norfolk Community Foundation | Information & communication | 2004 |
| Norfolk Community Law Service Ltd | Information & communication | 1998 |
| Norfolk Composites Limited | Professional & scientific | 2025 |
| Norfolk Computer Services Ltd | Extraterritorial | 2021 |
| Norfolk Construction & Anglian Recycling Ltd | Construction | 2024 |
| Norfolk Construction & Landscaping Ltd | Construction | 2017 |
| Norfolk Construction & Recycling Ltd | Construction | 2024 |
| Norfolk Construction & Waste Recycling Ltd | Construction | 2024 |