| Northfield House Management (Mundesley) Ltd | Real estate | 2021 |
| Northgate House Property Ltd | Real estate | 2016 |
| Northgate Lifestyle Limited | Wholesale & retail | 2017 |
| Northman Aero Services Ltd | Manufacturing | 2021 |
| Northside Motors Ltd | Wholesale & retail | 2019 |
| Northstar Technical Solutions Ltd | Professional & scientific | 2026 |
| Northwards Properties Limited | Real estate | 2019 |
| Northway House Residential Home Limited | Health & social care | 2000 |
| Northwest Holidays Ltd | Administrative & support | 2015 |
| Northwic Projects Ltd | Real estate | 2022 |
| Northwold Blue Limited | Professional & scientific | 2017 |
| Northwood Norwich Ltd | Real estate | 2003 |
| Northwood Tree & Garden Services Ltd | Construction | 2015 |
| Norton & Norton Property Management Limited | Real estate | 2020 |
| Norton & Singer Homes Ltd | Construction | 2021 |
| Norton & Singer Investments Ltd | Real estate | 2023 |
| Norton Construction (Brundall) Limited | Construction | 2017 |
| Norton House Limited | Households | 2017 |
| Norton Legal Limited | Professional & scientific | 2012 |
| Norton Plastic Surgery Limited | Health & social care | 2014 |
| Norton Studios Ltd | Information & communication | 2013 |
| Nortonscan Limited | Real estate | 1985 |
| Norvic Guards Security Ltd | Administrative & support | 2025 |
| Norvic Healthcare (Anglia) Limited | Health & social care | 2003 |
| Norvic Holdings Ltd | Real estate | 2018 |
| Norvic Investments Ltd | Real estate | 2019 |
| Norvic Knives Ltd | Wholesale & retail | 2024 |
| Norvic Properties Ltd | Real estate | 2019 |
| Norvic Training (UK) Ltd. | Education | 2009 |
| Norvista Ltd | Construction | 2025 |
| Norwa Care Solutions Ltd | Administrative & support | 2024 |
| Norwegian Design Holding Ltd | Wholesale & retail | 2025 |
| Norwich & District Wildfowlers Association Limited | Arts & recreation | 2006 |
| Norwich & Norfolk Developments Ltd | Construction | 2021 |
| Norwich & Norfolk Surgical Ltd | Health & social care | 2017 |
| Norwich (Baltic Wharf) Management Company Limited | Real estate | 2005 |
| Norwich Academy of Driving Ltd | Education | 2024 |
| Norwich Accommodation Agency Trustees Limited | Administrative & support | 2023 |
| Norwich Accommodation Ltd | Hospitality | 2002 |
| Norwich Accountancy Services Ltd | Professional & scientific | 2010 |
| Norwich Aesthetics Clinic Ltd | Health & social care | 2021 |
| Norwich Airport Fuel Services Limited | Transport & logistics | 2025 |
| Norwich Airport Taxis Limited | Administrative & support | 2017 |
| Norwich Aluminium Limited | Manufacturing | 2015 |
| Norwich and District Society of Model Engineers Limited | Other services | 1967 |
| Norwich Apex Limited | Construction | 2019 |
| Norwich Auto Locksmith Limited | Wholesale & retail | 2024 |
| Norwich Autoworks Ltd | Wholesale & retail | 2020 |
| Norwich Balustrade Installations Ltd | Construction | 2017 |
| Norwich Bargains Ltd | Wholesale & retail | 2025 |
| Norwich Bespoke Paving and Landscaping Ltd | Administrative & support | 2019 |
| Norwich Bicycle Repair Co-Operative Ltd | Manufacturing | 2013 |
| Norwich Biosciences Limited | Professional & scientific | 1995 |
| Norwich Brickwork Ltd | Administrative & support | 2016 |
| Norwich Building & Carpentry Services Ltd | Construction | 2025 |
| Norwich Building Services Limited | Construction | 2015 |
| Norwich Business Aviation Centre Ltd | Other services | 2009 |
| Norwich Business Improvement District Limited | Other services | 2012 |
| Norwich Business Projects 2 Limited | Extraterritorial | 2024 |
| Norwich Business Women's Network Limited | Other services | 2025 |
| Norwich Cameras Limited | Wholesale & retail | 2025 |
| Norwich Capital Group Limited | Financial services | 2014 |
| Norwich Car Centre Limited | Wholesale & retail | 1986 |
| Norwich Car Clinic Limited | Manufacturing | 2016 |
| Norwich Car Sales Limited | Wholesale & retail | 2015 |
| Norwich Car Storage Ltd | Transport & logistics | 2023 |
| Norwich Car Store Ltd | Wholesale & retail | 2024 |
| Norwich Caravans Limited | Wholesale & retail | 1967 |
| Norwich Cathedral Enterprises Limited | Wholesale & retail | 1972 |
| Norwich Ceilings and Interiors Ltd | Construction | 2023 |
| Norwich Chiropractic Ltd | Health & social care | 2021 |
| Norwich Choi Kwang DO Ltd | Arts & recreation | 2026 |
| Norwich Christian Resources | Extraterritorial | 2008 |
| Norwich City Football Development Limited | Arts & recreation | 2019 |
| Norwich City New Co Ltd | Real estate | 2019 |
| Norwich City of ALE Limited | Administrative & support | 2010 |
| Norwich City Services Limited | Administrative & support | 2020 |
| Norwich City Transport Ltd | Transport & logistics | 2022 |
| Norwich Cleaning Equipment Ltd | Wholesale & retail | 2023 |
| Norwich Cleaning Services Ltd. | Administrative & support | 2011 |
| Norwich Cleaning Solutions Ltd | Administrative & support | 2022 |
| Norwich Cloud Ltd | Information & communication | 2021 |
| Norwich Coachworks Limited | Manufacturing | 1997 |
| Norwich Colour Print Limited | Manufacturing | 1984 |
| Norwich Commercial Rooms Ltd | Health & social care | 2022 |
| Norwich Community Support Umbrella Network CIC | Information & communication | 2025 |
| Norwich Computer Systems Limited | Information & communication | 2007 |
| Norwich Conservatory Roofs Ltd | Construction | 2022 |
| Norwich Consolidated Charities | Other services | 2015 |
| Norwich CP Limited | Hospitality | 2026 |
| Norwich Creative Ltd | Professional & scientific | 2011 |
| Norwich Dance Wear Limited | Wholesale & retail | 1979 |
| Norwich Dancewear Holdings Ltd | Wholesale & retail | 2026 |
| Norwich Delivery Limited | Transport & logistics | 2015 |
| Norwich Dental Care Limited | Health & social care | 2023 |
| Norwich Dermaclinic Limited | Wholesale & retail | 2019 |
| Norwich Developments Limited | Real estate | 1971 |
| Norwich Diocesan Board of Finance Limited(The) | Other services | 1906 |
| Norwich Double Glazing Repairs Ltd | Construction | 2024 |
| Norwich Drain Services Ltd | Water & waste | 2022 |