| 1004 Enclave Limited | Administrative & support | 2024 |
| 11:11 Brand Alignment Ltd | Professional & scientific | 2022 |
| 1606 Investments Ltd | Real estate | 2025 |
| 21 Augusta Road RTM Company Limited | Households | 2012 |
| 22 Coffee Lounge Ltd | Hospitality | 2024 |
| 2CHOLIDAYS Ltd | Real estate | 2019 |
| 3ITC Limited | Administrative & support | 2020 |
| 3QUENCI Limited | Other services | 2015 |
| 5779 Training and Development Ltd | Education | 2018 |
| 63 Saltram Crescent Limited | Households | 1998 |
| 777 Networks Limited | Information & communication | 2011 |
| A G Francis Ltd | Other services | 2025 |
| A G Moore Limited | Wholesale & retail | 2012 |
| A J Freezer Water Services Limited | Agriculture & fishing | 2001 |
| A&S Stratton Property Group Ltd | Real estate | 2022 |
| A.M. UK Security Limited | Administrative & support | 2010 |
| AB Stoves & Home Improvements Limited | Other services | 2023 |
| Abacus Hotels Limited | Hospitality | 1995 |
| ABC Motorcycles Ltd | Manufacturing | 2024 |
| AC Brittain Ltd | Professional & scientific | 2012 |
| AC Docking House Limited | Health & social care | 2026 |
| AC Driftwood House Limited | Health & social care | 2026 |
| AC Norfolk Lodge Limited | Health & social care | 2026 |
| AC Solutions International Limited | Administrative & support | 2014 |
| AC Summerville House Limited | Health & social care | 2026 |
| AC Terrington Lodge Limited | Health & social care | 2026 |
| AC Whitehaven Limited | Health & social care | 2024 |
| Acorn Works Limited | Construction | 1998 |
| Action Apps Limited | Administrative & support | 2020 |
| Aermotus Ltd | Other services | 2017 |
| Agrd Ltd | Professional & scientific | 2020 |
| AHF Swaffham Limited | Hospitality | 2025 |
| Air Accountancy Services Ltd | Professional & scientific | 2025 |
| Air Charter Solutions Ltd | Transport & logistics | 2012 |
| Airo Cycles Ltd | Manufacturing | 2019 |
| AJ Records Holdings Limited | Financial services | 2026 |
| AJ Records Limited | Hospitality | 2026 |
| AJM Training Limited | Administrative & support | 2016 |
| AJR Hanway Limited | Real estate | 2026 |
| Akesis Consulting Ltd | Professional & scientific | 2022 |
| AKM Accounting Solutions Limited | Professional & scientific | 2017 |
| AKM Advisory Limited | Administrative & support | 2025 |
| AKM Associates Limited | Professional & scientific | 1999 |
| Albion Dock Company Limited | Manufacturing | 2017 |
| Aldridge Developments Limited | Construction | 2015 |
| Alexia Xani Ltd | Wholesale & retail | 2025 |
| ALIN2021 Limited | Hospitality | 2024 |
| ALL Car Components (Norfolk) Ltd | Financial services | 2024 |
| ALL Property Trading LLP | | 2017 |
| ALL Property Ventures Limited | Construction | 2017 |
| Alpe International Projects Limited | Administrative & support | 2025 |
| Alpha Homes (Norfolk) Ltd | Construction | 2007 |
| Alpha UK Projects Limited | Construction | 2018 |
| AM88 Corporation Limited | Administrative & support | 2025 |
| AMB Plant Limited | Construction | 2004 |
| Ambassador Supreme Ltd | Manufacturing | 2026 |
| Amco Safety Management Services Ltd | Professional & scientific | 2017 |
| Amia Design Limited | Information & communication | 2021 |
| Amorphous State Limited | Financial services | 2017 |
| Amped Fitness Ltd | Arts & recreation | 2023 |
| Andrew Francis Funeral Services King's Lynn Ltd | Other services | 2017 |
| Anglia Recycling and Repurposing of Organic Waste Limited | Administrative & support | 2021 |
| Anvic Precision Engineering Limited | Manufacturing | 1999 |
| APF Safety Services Limited | Information & communication | 2015 |
| AQB Solutions Limited | Administrative & support | 2022 |
| Aqua Clarity Limited | Extraterritorial | 2010 |
| Arbortec Forestwear Ltd | Wholesale & retail | 2025 |
| Argo Construction Services Limited | Construction | 2019 |
| Arms Alliance Limited | Financial services | 2024 |
| Armscare Limited | Real estate | 2002 |
| Array INK Europe Limited | Wholesale & retail | 2003 |
| Arteko Ltd | Construction | 2021 |
| Arthur Green Limited | Real estate | 2020 |
| Artichoke Collection Limited | Wholesale & retail | 2015 |
| Articom Limited | Construction | 2015 |
| Artj Pallets Limited | Wholesale & retail | 2025 |
| AS Prescribed Health Ltd | Health & social care | 2025 |
| ASHA1 Ltd | Health & social care | 2025 |
| Astraea Hercules Limited | Professional & scientific | 2024 |
| Athena Holistics Limited | Health & social care | 2011 |
| Aware Advisory Limited | Professional & scientific | 2026 |
| Aware Hospitality Ltd | Professional & scientific | 2017 |
| B H Aggregates and Recycling Ltd | Construction | 2023 |
| B H Haulage Ltd | Transport & logistics | 2021 |
| B Sharp Quality Consulting Limited | Professional & scientific | 2023 |
| Back Equity Estates Limited | Real estate | 2016 |
| Back Holdings Limited | Financial services | 2024 |
| Back Real Estate Limited | Financial services | 2024 |
| Backlog Radiology Limited | Health & social care | 2023 |
| Ballycassidi Limited | Real estate | 2021 |
| Barefoot Norfolk Ltd | Real estate | 2014 |
| Barn Door Developments Limited | Construction | 2025 |
| Barradell and Daughters Limited | Wholesale & retail | 2024 |
| BC Developments (Norfolk) Ltd | Construction | 2025 |
| BDI Energy Limited | Manufacturing | 2023 |
| BDI Group Holdings Ltd | Professional & scientific | 2018 |
| Beckfield Before Limited | Administrative & support | 2021 |
| Beel's Plumbing and Heating Limited | Construction | 2023 |
| Beijing 2023 Ltd | Hospitality | 2023 |
| Belters News Limited | Information & communication | 2024 |