| 08000 Health Limited | Real estate | 2008 |
| 0800GASMAN Limited | Construction | 2018 |
| 100-110 (Even) Phoenix Way RTM Company Ltd | Households | 2023 |
| 11626218 Ltd | Manufacturing | 2018 |
| 127 Trading Ltd | Hospitality | 2019 |
| 16 North Villas Limited | Real estate | 2005 |
| 1ST Couriers Limited | Transport & logistics | 2020 |
| 21 Moy's Ltd | Construction | 2021 |
| 21:01 Aesthetic and Wellness Clinic Ltd | Other services | 2024 |
| 2F Air Conditioning Ltd | Administrative & support | 2021 |
| 2SOM Ltd | Manufacturing | 2018 |
| 2XSM Consulting Limited | Professional & scientific | 2023 |
| 3 Point Property Block Management Ltd | Real estate | 2020 |
| 3 Point Property Development Limited | Construction | 2022 |
| 3 Point Property Management Limited | Households | 2013 |
| 365 Resource Solutions Ltd | Administrative & support | 2023 |
| 3ADESIGN Ltd | Professional & scientific | 2016 |
| 4 Acts Life Coaching Ltd | Other services | 2024 |
| 420 Media Ltd | Professional & scientific | 2025 |
| 48-58 (Even) Phoenix Way RTM Company Ltd | Households | 2024 |
| 4B Building Limited | Construction | 2021 |
| 51 North Consulting Limited | Professional & scientific | 2009 |
| 8-BIT EGG Limited | Other services | 2022 |
| A 1 4 Vans LLP | | 2013 |
| A F Upton Transport Limited | Transport & logistics | 2022 |
| A H & S Consultants Limited | Professional & scientific | 2013 |
| A J Drewery Electrical Limited | Construction | 2018 |
| A J Stiff Construction Limited | Construction | 2017 |
| A Little Box of Memories Limited | Professional & scientific | 2008 |
| A Maclean Construction Management Limited | Professional & scientific | 2017 |
| A Porch & Sons (Builders) Limited | Construction | 2003 |
| A R Catering & Company Limited | Hospitality | 2018 |
| A&J Prime Development Ltd | Construction | 2026 |
| A&J Prime Properties Ltd | Real estate | 2026 |
| A.C. Electrical (Suffolk) Limited | Manufacturing | 2018 |
| A.D Agri Contractor & Pest Control Ltd | Agriculture & fishing | 2023 |
| A.M. & P.M. Transportation Limited | Transport & logistics | 1999 |
| A.P.G. Painting & Decorating Limited | Construction | 2025 |
| A.R.W. Plumbing and Heating Ltd | Construction | 2004 |
| A.W Service Centre Ltd | Wholesale & retail | 2022 |
| A1 Commercials Ltd | Wholesale & retail | 2019 |
| A2B Solution Logistics Limited | Professional & scientific | 2018 |
| AA Salvage Repair and Sales Ltd | Wholesale & retail | 2023 |
| AB Trees Tree Surgery Limited | Administrative & support | 2024 |
| Abacus Square Limited | Professional & scientific | 2016 |
| Abbey Developments (Suffolk) Ltd | Construction | 2014 |
| Abigail Hirshman Consulting Limited | Professional & scientific | 2020 |
| Abigail Walton Design Studio Ltd | Professional & scientific | 2026 |
| Ablaze Media Limited | Professional & scientific | 2002 |
| ABP Construction Services Limited | Professional & scientific | 2005 |
| ABS Home Improvements Limited | Real estate | 2002 |
| Acceleration Associates Limited | Professional & scientific | 2016 |
| Accountancy & Admin Services Limited | Professional & scientific | 2008 |
| Ace (Anglia) Limited | Health & social care | 2013 |
| Ace Reception Ltd | Professional & scientific | 2026 |
| Acre Farm (Suffolk) LLP | | 2024 |
| Action 97 Limited | Financial services | 2022 |
| Acumen Executive Coaching Limited | Professional & scientific | 2003 |
| AD Astra Avionics Ltd | Manufacturing | 2016 |
| AD Engineering Limited | Manufacturing | 2025 |
| Adams & Briggs Property Limited | Real estate | 2025 |
| Adaptasoft Limited | Information & communication | 2012 |
| Adaptive Computer Solutions Ltd | Information & communication | 2016 |
| Adream Properties Ltd | Real estate | 2019 |
| Adrian Pritchard Consultancy Ltd | Professional & scientific | 2023 |
| Advance Hypnotherapy Limited | Other services | 2017 |
| Advanced Demolition Limited | Water & waste | 1997 |
| Affine Consulting Ltd | Professional & scientific | 2019 |
| Afrocrib Limited | Wholesale & retail | 2026 |
| Afrowears Ltd | Manufacturing | 2026 |
| Agriinsight Ltd | Information & communication | 2013 |
| Agroinsights Technologies Ltd | Information & communication | 2025 |
| AH Hair Ltd | Other services | 2018 |
| AI Tree Services Limited | Agriculture & fishing | 2017 |
| Airestead Property Developments (Eastern) LLP | | 2016 |
| Airestead Property Developments Limited | Real estate | 2015 |
| AJ Autos Stowmarket Ltd | Wholesale & retail | 2025 |
| AJ Chapman Investments Ltd | Real estate | 2017 |
| AJK Cabling Ltd | Construction | 2024 |
| AJM Cellar Service Limited | Wholesale & retail | 2026 |
| AJP Holdco Limited | Financial services | 2018 |
| AK Plumbing and Heating (Suffolk) Limited | Construction | 2015 |
| Akamai Intelligence Limited | Professional & scientific | 2017 |
| Akenfield Homes Limited | Construction | 2014 |
| AKW Technologies Limited | Professional & scientific | 2009 |
| Alan John King Limited | Construction | 2011 |
| ALB Business Consulting Limited | Professional & scientific | 2022 |
| Alexander Crow Limited | Wholesale & retail | 2013 |
| Alexander Welding Services Suffolk Limited | Manufacturing | 2014 |
| Alexandliane Limited | Administrative & support | 2011 |
| Alfaa Property Management Ltd | Real estate | 2024 |
| ALL Aspects Landscapes Ltd | Construction | 2023 |
| ALL Safe Plumbing & Storage Ltd | Transport & logistics | 2025 |
| Allbolts Limited | Manufacturing | 1998 |
| Allbury Maintenance Services Limited | Construction | 2011 |
| Alnoi Property Limited | Real estate | 2026 |
| Alpasky Limited | Professional & scientific | 2015 |
| Alpha 1 Projects Limited | Real estate | 2022 |
| Alpha 6 Consulting Limited | Professional & scientific | 2025 |
| ALS Accountancy Services Limited | Professional & scientific | 1997 |