| 237 Group Limited | Real estate | 2023 |
| 240 Wherstead Ltd | Construction | 2023 |
| 3 H Services (UK) Ltd | Wholesale & retail | 2014 |
| 4 Girls Travel Limited | Administrative & support | 1996 |
| 4 Life Landscapes Limited | Administrative & support | 2013 |
| 8-TRACK Ltd | Professional & scientific | 2021 |
| A & M Ingram Holdings Limited | Financial services | 2025 |
| A & M Marble Construction Limited | Professional & scientific | 1989 |
| A and K Plumbing and Maintenance Ltd | Construction | 2025 |
| A Trip Down Memory Lane LP | | 2023 |
| AAG Homes Limited | Extraterritorial | 2013 |
| Aaron Clarke Ltd | Extraterritorial | 2016 |
| AB Plumbing & Heating Suffolk Ltd | Construction | 2021 |
| Abacus Construction Services Limited | | 1991 |
| Accelerate Leisure Ltd | Hospitality | 2020 |
| Advised Consulting Group Limited | Professional & scientific | 2019 |
| Agentic Capital Limited | Manufacturing | 2020 |
| AJB Productions Limited | Information & communication | 2006 |
| Alchemist Ltd | Financial services | 2013 |
| Alfa Trustees Limited | Extraterritorial | 1993 |
| ALP Consulting Limited | Information & communication | 2025 |
| Amos Services Hadleigh Limited | Real estate | 2002 |
| Anchor Fencing and Landscaping Ltd | Administrative & support | 2026 |
| Anglo Overseas Admin Services Limited | Transport & logistics | 2017 |
| ANJ Haulage (GBR) Ltd | Transport & logistics | 2024 |
| Apex Container Logistics Limited | Transport & logistics | 2025 |
| Arnold Consulting Limited | Professional & scientific | 2026 |
| Aspire Integrated Services Limited | Other services | 2018 |
| Assured Conveyancing Searches East Ltd | Professional & scientific | 2025 |
| Astral Global Logistics Limited | Transport & logistics | 2020 |
| AT Capital Management Ltd | Agriculture & fishing | 2020 |
| Audrey Alexandra Consultancy Limited | Professional & scientific | 2025 |
| Authentic Paving and Building Ltd | Construction | 2021 |
| Authentic Roofing and Building Ltd | Construction | 2024 |
| Autoplant Limited | Wholesale & retail | 2011 |
| Avaco Ltd | Transport & logistics | 2026 |
| AVO Marketing Agency Ltd | Professional & scientific | 2024 |
| Axis Commercial Interiors Ltd | Construction | 2026 |
| Aztec Heat Pumps Ltd | Construction | 2012 |
| BCO Medical Limited | Other services | 2022 |
| Beals Joinery Limited | Wholesale & retail | 1988 |
| Beaumont Premier Cars Ltd | Transport & logistics | 2021 |
| Beauti Within Ltd | Other services | 2020 |
| Beestons (Hadleigh) Limited | Transport & logistics | 1952 |
| Benaray Ltd | Information & communication | 2023 |
| Bentley & Co Promotions Ltd | Professional & scientific | 2026 |
| Bescon Bespoke Construction Ltd | Construction | 2024 |
| Bescon Ltd | Construction | 2015 |
| BGM Investors Ltd | Professional & scientific | 2024 |
| Bio-Lion (UK) Ltd | Administrative & support | 2026 |
| Bioethanol-Fireplace Limited | Wholesale & retail | 2021 |
| Black Hart Tattoos Ltd | Other services | 2023 |
| BLU Bear Holdings Limited | Real estate | 2017 |
| Blush Living Limited | Wholesale & retail | 2019 |
| Bray Estates Ltd | Real estate | 2019 |
| BRE Developments Ltd | Construction | 2025 |
| British European Study Tours Limited | Education | 1999 |
| Bryanstone Limited | Real estate | 2010 |
| Buckley LDC Limited | Construction | 2018 |
| Bushell Enterprises Ltd | Financial services | 2023 |
| Bushell Entertainment Ltd | Administrative & support | 2020 |
| BWB (East Anglia) Limited | Professional & scientific | 2017 |
| BY Design Electrical Ltd | Construction | 2018 |
| Byford Court (Hadleigh) Management Limited | Real estate | 2004 |
| C.K. Chemicals Ltd. | Wholesale & retail | 1987 |
| Capital City Building Solutions Ltd | Construction | 2026 |
| Carpet Matters Limited | Wholesale & retail | 1990 |
| Castle Multimedia (UK) Limited | Information & communication | 2018 |
| CC Corporate Ltd | Wholesale & retail | 2022 |
| CFS Handling Ltd | Transport & logistics | 2022 |
| Charles Wright Ltd | Real estate | 2021 |
| Charles Wright Property Holdings Ltd | Real estate | 2023 |
| China Garden IP7 LD Limited | Hospitality | 2021 |
| Church Street Developments Suffolk Ltd | Real estate | 2023 |
| CL Ductwork Ltd | Construction | 2026 |
| CLC Partnership Ltd | Professional & scientific | 2025 |
| Cleanseco Ltd | Administrative & support | 2024 |
| Clearfast Limited | Transport & logistics | 1980 |
| Clissold Developments Ltd | Construction | 2024 |
| Colin Parker Ltd | Construction | 2019 |
| Comino Capital Management Limited | Professional & scientific | 2013 |
| Complete Swimming Pool Services Limited | Administrative & support | 2004 |
| Constable Coaches Limited | Transport & logistics | 1962 |
| Construction One East Ltd | Construction | 2022 |
| Copdock Enterprises Ltd | Professional & scientific | 2019 |
| Corn Exchange Business Centre Limited | Real estate | 2016 |
| CP Sheetfeeders Ltd | Manufacturing | 2011 |
| CPI Commercial Painting & Interiors Ltd | Construction | 2026 |
| CPJ Painting & Decorating Ltd | Construction | 2020 |
| Crowe Groundworks (Norfolk) Ltd | Construction | 2024 |
| Cuthbert Corporate Travel Limited | Transport & logistics | 2025 |
| CW Properties (Suffolk) Ltd | Construction | 2022 |
| D & C Communications Ltd | Construction | 2020 |
| D & G Estates (GBR) Ltd | Real estate | 2020 |
| D G Heating (Suffolk) Ltd | Construction | 2022 |
| Daniel Newman Racing Ltd | Information & communication | 2025 |
| Dare Films Limited | Information & communication | 2021 |
| Data Defence Consulting Ltd | Professional & scientific | 2023 |
| Dave Howard Consulting Ltd | Professional & scientific | 2021 |
| DBF Builders UK Ltd | Construction | 2016 |