| 00825409 Limited | Information & communication | 1964 |
| 1 Clifton Lawn RTM Company Limited | Real estate | 2008 |
| 11 Moorland Road Limited | Households | 2025 |
| 1SANDYFORD Limited | Real estate | 2014 |
| 1ST Training Properties Limited | Real estate | 2011 |
| 2 DEC Limited | Construction | 2007 |
| 2 Samba Limited | Health & social care | 2016 |
| 21 East Coffee Ltd | Hospitality | 2021 |
| 24/7 Emergency Plumbing Norwich Ltd | Construction | 2026 |
| 25 Creative Ltd | Information & communication | 2024 |
| 2780 Limited | Wholesale & retail | 2024 |
| 28BUSINESS Ltd | Wholesale & retail | 2025 |
| 2SD Investments Limited | Real estate | 2021 |
| 2SD Limited | Professional & scientific | 2018 |
| 30 Marine Parade Property Management Limited | Households | 1990 |
| 360 Colombo Limited | Wholesale & retail | 2025 |
| 360KNIFEBLOCK Ltd | Wholesale & retail | 2025 |
| 365FIT Pro Ltd | Transport & logistics | 2024 |
| 36FASHIONPOINT Ltd | Wholesale & retail | 2025 |
| 37 Pavilion Road Limited | Hospitality | 2012 |
| 3D at Depth Limited | Professional & scientific | 2018 |
| 3D Creations Limited | Administrative & support | 2010 |
| 3J Property Investment Limited | Real estate | 2016 |
| 60 Clarence Road Management Company Limited | Real estate | 2004 |
| 7EVN Entertainments Limited | Hospitality | 2025 |
| 7EVN Leisures Limited | Hospitality | 2025 |
| 7EVN Prop Limited | Real estate | 2025 |
| 7EVN Retails Limited | Wholesale & retail | 2025 |
| 80/20 Services Limited | Hospitality | 2019 |
| 84 North Denes Road Ltd | Households | 2020 |
| 88MA Investments Ltd | Real estate | 2025 |
| 9BLEND Limited | Information & communication | 2024 |
| @Boomsterconsulting Ltd | Professional & scientific | 2017 |
| A & a Taverns Limited | Hospitality | 2014 |
| A & B Estates Limited | Hospitality | 2004 |
| A & F Myers Developements Ltd | Construction | 2022 |
| A & I Bromwich Promotions Limited | Hospitality | 2012 |
| A Bell Plumbing and Maintenance Ltd | Construction | 2026 |
| A C Pembroke (Builder) Ltd | Construction | 1998 |
| A C Pembroke (Construction) Ltd | Construction | 2009 |
| A Classic Improvements Limited | Construction | 2024 |
| A Couple of Decorators Ltd | Construction | 2024 |
| A Fordable Storage Solutions Limited | Wholesale & retail | 2010 |
| A G Parker Construction Ltd | Professional & scientific | 2013 |
| A Lowe Builders Limited | Construction | 2009 |
| A M Road Markin.Gs Limited | Professional & scientific | 2010 |
| A R Brickwork Ltd | Construction | 2021 |
| A S Construction (Essex) Ltd | Construction | 2015 |
| A S S Electrics Ltd | Construction | 2024 |
| A Star Cleaning Services (Norfolk) Limited | Administrative & support | 2020 |
| A V Footwear Limited | Wholesale & retail | 2010 |
| A W P R (East Anglia) Limited | Real estate | 2021 |
| A W Plant Limited | Professional & scientific | 2003 |
| A Watson Services Limited | Construction | 2025 |
| A&G Trans Ltd | Transport & logistics | 2025 |
| A&M Property Rentals Limited | Real estate | 2022 |
| A&P Star Ltd | Health & social care | 2024 |
| A-D-C Fabrication Ltd | Construction | 2023 |
| A.Akbar Medical Services Ltd | Health & social care | 2025 |
| A.J. Shorten Limited | Agriculture & fishing | 1980 |
| A.J.S Joinery Services Ltd | Construction | 2019 |
| A.J.T Companies Ltd | Wholesale & retail | 2022 |
| A.M.P Building & Plastering Services Ltd | Construction | 2025 |
| A.W. Plant Services Limited | Construction | 1982 |
| A1 Safety Training Consultants (1995) Ltd. | Education | 1995 |
| A2B Events Ltd | Wholesale & retail | 2023 |
| AA Renewables Ltd | Professional & scientific | 2025 |
| AA Sisters Properties Limited | Real estate | 2024 |
| AAA Green Ventures Limited | Real estate | 2021 |
| AAA Motor Services Limited | Wholesale & retail | 2018 |
| AAE Technologies Limited | Real estate | 2015 |
| Aaron Services Ltd | Extraterritorial | 2025 |
| Aaron Thurlow Ltd | Construction | 2025 |
| Aathi Estates Ltd | Real estate | 2026 |
| Aathi Express Ltd | Wholesale & retail | 2025 |
| AB Primary Care Locums Limited | Health & social care | 2013 |
| Abba Holdings Limited | Real estate | 2016 |
| Abbey Chemicals Properties Ltd | Administrative & support | 2014 |
| Abbey Environmental Limited | Extraterritorial | 2015 |
| Abbey Waste Control Limited | Water & waste | 2002 |
| Abbey Waste Limited | Extraterritorial | 2013 |
| Abbeychem Limited | Manufacturing | 1988 |
| ABC Developments UK Limited | Construction | 2024 |
| ABC GT Carwash Ltd | Wholesale & retail | 2025 |
| ABP Trans Ltd | Transport & logistics | 2023 |
| Abro Engineering (East Anglia) Ltd | Professional & scientific | 2013 |
| Absolute Scenes Photography Ltd | Professional & scientific | 2018 |
| Abstinence Limited | Real estate | 2020 |
| AC Electrical (East Anglia) Limited | Construction | 2012 |
| AC Gilchrist Ltd | Other services | 2024 |
| Access & Safety Ltd | Construction | 2026 |
| Access Heights Ltd | Professional & scientific | 2025 |
| Access Solutions (GT Yarmouth) Limited | Mining & quarrying | 2015 |
| Accessible Automotive Ltd | Wholesale & retail | 2025 |
| Accounting Equations Ltd | Professional & scientific | 2002 |
| Ace Damp Solutions Ltd | Construction | 2024 |
| ACN Marine Limited | Professional & scientific | 2016 |
| ACN Offshore Ltd. | Professional & scientific | 2018 |
| Acorn & SON Developments Limited | Construction | 2025 |
| Adams Cleaning & Maintenance Services Limited | Administrative & support | 2003 |