| 11 Kirkley Cliff Management Company Limited | Real estate | 2005 |
| 121 Change Limited | Administrative & support | 2019 |
| 38X Cyber Ltd | Professional & scientific | 2011 |
| 4ADVISORY Limited | Professional & scientific | 2013 |
| A J Duncan Consulting Ltd | Information & communication | 2015 |
| A M Knowledge Care Services Limited | Health & social care | 2023 |
| A P H Screens Limited | Manufacturing | 2005 |
| A Randlesome Limited | Mining & quarrying | 2012 |
| A S Elvin Transport Ltd | Transport & logistics | 2015 |
| A W Folkes Haulage Limited | Transport & logistics | 2003 |
| A&D Watson Ltd | Real estate | 2022 |
| A.T.Bent(Properties)Limited | Real estate | 1960 |
| A1 Clearance and Recycling Limited | Water & waste | 2019 |
| Abseilute Inspection Solutions Ltd | Professional & scientific | 2014 |
| Acapella Ltd | Information & communication | 2026 |
| Access Plastering & Rendering Ltd | Construction | 2025 |
| Accounting Taxation & Business Services Limited | Professional & scientific | 2015 |
| Ace Clearance (East Anglia) Ltd | Water & waste | 2021 |
| Acescreen Computing Limited | Hospitality | 1996 |
| Action Traffic Management Ltd | Professional & scientific | 2021 |
| Admora Ltd | Professional & scientific | 2025 |
| Adspec Solutions Ltd | Real estate | 2014 |
| Adyta Limited | Construction | 2023 |
| Agentrest Limited | Wholesale & retail | 2000 |
| Agri-Connect Ltd | Agriculture & fishing | 2020 |
| Agserve Ltd | Agriculture & fishing | 2022 |
| Airbridge Rentals Limited | Administrative & support | 2009 |
| Aircraft Solutions Ltd | Professional & scientific | 2019 |
| AJA Recruitment Limited | Administrative & support | 2018 |
| AJK Lettings Ltd | Real estate | 2021 |
| AJR Sales Ltd | Wholesale & retail | 2021 |
| Alex Banks Music Ltd | Arts & recreation | 2002 |
| Alexander Piatigorsky Trust | Other services | 2010 |
| Alfie Bowen Photography Ltd | Professional & scientific | 2018 |
| Alice Mattocks Medical Aesthetics Limited | Health & social care | 2023 |
| Allsaints Distillery Ltd | Manufacturing | 2019 |
| Amber Heating Solutions Limited | Extraterritorial | 2015 |
| Andra 2021 Valeting Ltd | Other services | 2022 |
| Andy Bierton Limited | Transport & logistics | 2016 |
| Anglia Print Limited | Manufacturing | 2008 |
| Anglia Therapy Ltd | Health & social care | 2015 |
| Anglian Construction Services Ltd | Construction | 2025 |
| Anglian HCW Limited | Other services | 2017 |
| Annamar UK Limited | Wholesale & retail | 2018 |
| Anthony Charles Beccles Ltd | Wholesale & retail | 2025 |
| Apex Link Solutions Limited | Wholesale & retail | 2026 |
| Apparition Marketing and Design Limited | Professional & scientific | 2009 |
| Aquablast Limited | Manufacturing | 1988 |
| Aquagas (Anglia) Limited | Construction | 2005 |
| Archy Rival UK Limited | Information & communication | 2023 |
| ARG (East Anglia) Limited | Water & waste | 2022 |
| Arowick Limited | Arts & recreation | 2014 |
| Artisan Dairy Company Ltd | Wholesale & retail | 2025 |
| Asha Aura Ltd | Wholesale & retail | 2025 |
| Assured Electrical Services (East Anglia) Limited | Construction | 2006 |
| ATK Communications Limited | Professional & scientific | 2016 |
| Atlantic SME Ltd | Arts & recreation | 2013 |
| ATR Estates Ltd | Real estate | 2017 |
| Attenburrow Training and Education Limited | Professional & scientific | 2015 |
| Audio Images (Lowestoft) Ltd. | Wholesale & retail | 1990 |
| Aura & Co East Anglia Ltd | Wholesale & retail | 2026 |
| Auricle Studio Limited | Professional & scientific | 2019 |
| AW Saltgate Ltd | Real estate | 2025 |
| B & B Skip Hire Ltd | Water & waste | 2002 |
| B K W LLP | | 2010 |
| B&B Radical Limited | Manufacturing | 2014 |
| B.F.S. Enterprise (Fabrications) Limited | Manufacturing | 1978 |
| Baileys Delicatessen Ltd | Wholesale & retail | 2018 |
| Baldwins Electrical Services Ltd | Manufacturing | 2016 |
| Ball Electrical Ltd | Construction | 2023 |
| Barber Rail Services Ltd | Construction | 2017 |
| Barleybird C.I.C. | Agriculture & fishing | 2023 |
| Barnby Motors Ltd | Wholesale & retail | 2018 |
| Barsham Securities Limited | Real estate | 1987 |
| Bay & FIG Events Ltd | Hospitality | 2023 |
| Bear and Bells Limited | Hospitality | 2022 |
| Beautifully Buxom Ltd | Wholesale & retail | 2016 |
| Beccles and Sibson Skydivers Ltd | Administrative & support | 2017 |
| Beccles Auctions Ltd | Wholesale & retail | 2023 |
| Beccles Books Limited | Wholesale & retail | 2011 |
| Beccles Conservative Club Limited(The) | Other services | 1911 |
| Beccles Convenience Store Ltd | Wholesale & retail | 2025 |
| Beccles Equine Veterinary Services Ltd | Professional & scientific | 2024 |
| Beccles Lido Limited | Arts & recreation | 2009 |
| Beccles Lido Trading Limited | Hospitality | 2014 |
| Beccles Maltings Association Limited | Households | 1973 |
| Beccles Mobility Centre Ltd | Wholesale & retail | 2023 |
| Beccles Mobility Ltd | Wholesale & retail | 2025 |
| Beccles MOT Centre Ltd | Professional & scientific | 2022 |
| Beccles Public Hall Trading Limited | Other services | 2023 |
| Beccles Rugby Club | Education | 2016 |
| Beccles Store Ltd | Wholesale & retail | 2026 |
| Beccles Takeaway Limited | Hospitality | 2026 |
| Beccles Tile Centre Limited | Construction | 1985 |
| Beccles Town FC Limited | Arts & recreation | 2018 |
| Beccles Tyre Centre Limited | Wholesale & retail | 2012 |
| Beechglen Properties Limited | Extraterritorial | 1988 |
| Bellingham Homes Ltd | Construction | 2014 |
| BEN Smith Associates Limited | Wholesale & retail | 2002 |
| Benacre (2022) LLP | | 2022 |