| A & R Thornton Farming Ltd | Agriculture & fishing | 2023 |
| A & R Wright Consulting Limited | Professional & scientific | 2016 |
| A & S Cooling Services EOT Limited | Administrative & support | 2022 |
| A & S Cooling Services Limited | Construction | 2009 |
| A & T Barnes Limited | Construction | 1998 |
| A a H Software Ltd | Information & communication | 2016 |
| A a Waste Services Limited | Water & waste | 1993 |
| A a Zelley Ltd | Wholesale & retail | 2024 |
| A and D Garage Services Ltd | Wholesale & retail | 2014 |
| A and X Auto Garage Limited | Wholesale & retail | 2015 |
| A B C Holiday Lets Limited | Wholesale & retail | 2003 |
| A B Dack Plumbing and Heating Limited | Construction | 2019 |
| A Bayton Limited | Professional & scientific | 2010 |
| A Bennett Electrical (Norfolk) Ltd | Manufacturing | 2025 |
| A Bowles Ltd | Financial services | 2018 |
| A Brown Services Limited | Administrative & support | 2019 |
| A Building Solution Limited | Construction | 2015 |
| A Bull Consulting Limited | Professional & scientific | 2022 |
| A C Boiler Services Ltd | Other services | 2007 |
| A C Stephenson FS Ltd | Financial services | 2021 |
| A C Stocky Limited | Construction | 2026 |
| A Cancao DE Lisboa Limited | Wholesale & retail | 2015 |
| A Complete Window and Door Service Ltd | Construction | 2021 |
| A Connected Home Limited | Information & communication | 2015 |
| A Cutting Enterprises Ltd | Hospitality | 2018 |
| A D Hire Services Ltd | Administrative & support | 2018 |
| A D Mcdonald Haulage Ltd | Transport & logistics | 2012 |
| A D Nicholson Ltd | Wholesale & retail | 2025 |
| A D Renovates Ltd | Construction | 2024 |
| A Dancers World Limited | Wholesale & retail | 2007 |
| A Dent Limited | Wholesale & retail | 1934 |
| A E Barker Limited | Financial services | 2012 |
| A Elfleet Limited | Construction | 2022 |
| A F Vali Limited | Construction | 2015 |
| A F W Plastering Ltd | Construction | 2012 |
| A Fee-Lings Project Limited | Wholesale & retail | 2015 |
| A Hughes Ltd | Wholesale & retail | 2019 |
| A J Baker [Builders] Limited | Construction | 2002 |
| A J Engravers Ltd | Manufacturing | 2003 |
| A J Fields Limited | Hospitality | 2016 |
| A J Frozen Food Ltd | Other services | 2012 |
| A J Hodgson & Sons Ltd | Construction | 2011 |
| A J Last Limited | Construction | 2018 |
| A J Palmer Building & Maintenance Services Limited | Construction | 2004 |
| A J Roberts Installation Ltd | Manufacturing | 2024 |
| A J Syder Plumbing & Heating Ltd | Construction | 2013 |
| A Kind of Space Ltd | Information & communication | 2025 |
| A L T Mobile Mechanic Limited | Manufacturing | 2026 |
| A Life in Progress CIC | Health & social care | 2025 |
| A Little Bird Told ME Ceremonies Ltd | Other services | 2022 |
| A Little More Kindness CIC | Other services | 2023 |
| A M Bathrooms & Kitchens Ltd | Construction | 2022 |
| A M Blake Ltd | Professional & scientific | 2009 |
| A M G Carpentry Limited | Construction | 2007 |
| A MAY Services Limited | Manufacturing | 2022 |
| A Medicare Ltd | Health & social care | 2016 |
| A N Other Cole Consultancy Ltd | Real estate | 2022 |
| A New Vision Ltd | Wholesale & retail | 2025 |
| A Norfolk Break Ltd | Hospitality | 2020 |
| A P Marr Holdings Limited | Real estate | 2021 |
| A P Maynard Limited | Financial services | 2026 |
| A P Warehousing & Logistics Limited | Wholesale & retail | 2018 |
| A P West Ltd | Administrative & support | 2024 |
| A Phone Shop Ltd | Wholesale & retail | 2019 |
| A Piece of Cake (Coltishall) Limited | Hospitality | 2016 |
| A Piper Properties Ltd | Households | 2018 |
| A Plan Kitchens & Bedroom Furniture Limited | Manufacturing | 2013 |
| A Priest Solutions Ltd | Professional & scientific | 2011 |
| A R Construction (EA) Ltd | Construction | 2021 |
| A R Peachment Limited | Other services | 1991 |
| A R Plumbing & Heating Limited | Construction | 2004 |
| A Rich Company Limited | Professional & scientific | 2015 |
| A S Entertainment Ltd | Administrative & support | 2018 |
| A S Hardingham Limited | Other services | 2017 |
| A S Norwich Store Ltd | Wholesale & retail | 2025 |
| A S Supplies (Retford) Limited | Wholesale & retail | 2015 |
| A S W Advisory Limited | Professional & scientific | 2025 |
| A Safer Future Community Interest Company | Health & social care | 2025 |
| A Squared Architects Limited | Professional & scientific | 2017 |
| A Star Private Tutoring Ltd | Administrative & support | 2016 |
| A T Coombes Associates Limited | Agriculture & fishing | 2014 |
| A T Cornfield Roofing Ltd | Construction | 2024 |
| A T Fundell Limited | Financial services | 2012 |
| A T Plumbing & Heating Solutions Ltd | Construction | 2021 |
| A to Z Marine Ltd | Professional & scientific | 2015 |
| A W Electrical Services (Norwich) Limited | Construction | 2014 |
| A W Flooring (Norfolk) Ltd | Construction | 2017 |
| A W Hart Limited | Administrative & support | 2016 |
| A W Plumbing and Heating Norfolk Ltd | Construction | 2020 |
| A W Roofing Limited | Construction | 2007 |
| A W Webb Limited | Administrative & support | 2011 |
| A Wholesome Life Ltd | Information & communication | 2023 |
| A Will Works Limited | Arts & recreation | 2019 |
| A&A Apex Impex Ltd | Wholesale & retail | 2015 |
| A&C Clearances Ltd | Water & waste | 2014 |
| A&C Food and Drinks Ltd | Hospitality | 2019 |
| A&C Knowles Ltd | Health & social care | 2020 |
| A&C Promotions Ltd | Arts & recreation | 2018 |
| A&D Logan Logistics UK Ltd | Water & waste | 2015 |
| A&H Fastfood Limited | Hospitality | 2017 |