| 3DT Limited | Information & communication | 2007 |
| 3FO Future Co., Ltd | Wholesale & retail | 2022 |
| 4 Montague Road RTM Company Limited | Real estate | 2011 |
| 4 Tremadoc Road Management Limited | Households | 2018 |
| 4 Yscs Ltd | Professional & scientific | 2023 |
| 40/20 Consultancy Services Limited | Administrative & support | 2023 |
| 41FLOW Ltd | Information & communication | 2026 |
| 429ALPHA Ltd | Wholesale & retail | 2022 |
| 43 Royal York Crescent Management Company Limited | Real estate | 1995 |
| 43K Creative Limited | Information & communication | 2013 |
| 44 Construction 1 Limited | Construction | 2019 |
| 442 Turfcare Limited | Administrative & support | 2023 |
| 450 Marine Freehold Limited | Real estate | 2025 |
| 484 Office Furniture Limited | Real estate | 2003 |
| 4BYLAND Ltd | Wholesale & retail | 2026 |
| 4C Assets Limited | Real estate | 2026 |
| 4DNCN Ltd | Information & communication | 2026 |
| 4FISCAL Investments Limited | Extraterritorial | 2012 |
| 4N Care Ltd | Health & social care | 2019 |
| 4N PVT Limited | Transport & logistics | 2021 |
| 4P Properties Ltd | Financial services | 2023 |
| 4PRINCIPLES Construction Ltd | Construction | 2015 |
| 4SURE Accountancy Limited | Professional & scientific | 2013 |
| 5 K'S Management Ltd | Real estate | 2021 |
| 51 Talbot Street Ltd | Households | 2020 |
| 57 Henley Road Limited | Households | 2022 |
| 5DM Group Ltd | Professional & scientific | 2023 |
| 5DM Infinity Ltd | Professional & scientific | 2025 |
| 5EYES Properties Ltd | Real estate | 2025 |
| 5RQ Ltd | Wholesale & retail | 2021 |
| 6 CS Professional Care Limited | Health & social care | 2016 |
| 6 Elements Outdoor Living Ltd. | Professional & scientific | 2019 |
| 6 TEN 70 Limited | Professional & scientific | 2015 |
| 6 Willoughby Road RTM Company Limited | Households | 2020 |
| 61-67 Cauldwell Hall Road RTM Company Limited | Households | 2015 |
| 66 Nelson Road RTM Company Limited | Real estate | 2009 |
| 6T6 Ltd | Construction | 2025 |
| 7 Days Market Ipswich Ltd | Wholesale & retail | 2025 |
| 7 Days Transport Ltd | Transport & logistics | 2017 |
| 7 Days Whitton Ltd | Wholesale & retail | 2024 |
| 7-9 ELM Street Ipswich RTM Company Limited | Households | 2020 |
| 7/11 Handyman Services Ltd | Professional & scientific | 2016 |
| 7/8 Delivery Ltd | Transport & logistics | 2024 |
| 70 Lavenham Road RTM Company Limited | Households | 2020 |
| 72 Wrentham Avenue Management Company Limited | Real estate | 1999 |
| 73/75 High RD West Residents Management Company Limited | Real estate | 2025 |
| 7711 Groundworks Ltd | Construction | 2024 |
| 786 Prestige Cars Ltd | Wholesale & retail | 2025 |
| 7CUBE Construction Ltd | Construction | 2019 |
| 8 Seafood Limited | Wholesale & retail | 2008 |
| 85 Aggregates Limited | Water & waste | 2025 |
| 85 Pembury Road Limited | Professional & scientific | 2021 |
| 852 Property Ltd | Households | 2025 |
| 8543CHAMBERS.LTD Limited | Manufacturing | 2024 |
| 87 Caelum Drive Limited | Real estate | 2016 |
| 888 Service Group Ltd | Administrative & support | 2024 |
| 9 Baltic Court Apartments Ltd | Real estate | 2022 |
| 9 Carr Street Convenience Ltd | Wholesale & retail | 2026 |
| 91 Chessington Road Development Limited | Construction | 2022 |
| 92 Christchurch Street (Ipswich) Management Company Limited | Households | 1987 |
| 964 Consulting Limited | Information & communication | 2011 |
| 9GUARD Security Services Ltd | Administrative & support | 2025 |
| 9PLUS1 Limited | Wholesale & retail | 2016 |
| 9TH ROW Official Ltd | Wholesale & retail | 2026 |
| A & a Tricker Limited | Wholesale & retail | 2013 |
| A & B S Property Ltd | Real estate | 2026 |
| A & D Investa Ltd | Real estate | 2024 |
| A & J Motor Services Limited | Wholesale & retail | 2002 |
| A & J Nextgen CIC | Arts & recreation | 2026 |
| A & K Valeting Services Ltd | Other services | 2021 |
| A & V Hair Limited | Other services | 2010 |
| A a Electrical (East Anglia) Ltd | Construction | 2002 |
| A a Mechanise Limited | Construction | 2022 |
| A Better View Limited | Administrative & support | 2013 |
| A Brady Picture Ltd | Arts & recreation | 2025 |
| A C Brickwork (South East) Limited | Construction | 2013 |
| A C R Car Services Ltd | Wholesale & retail | 2016 |
| A Cole Cars Ltd | Wholesale & retail | 2022 |
| A CUT Barber Ltd | Other services | 2020 |
| A D Scafes Ltd | Transport & logistics | 2018 |
| A DEV London Ltd | Transport & logistics | 2025 |
| A E White Surfacing Limited | Construction | 1999 |
| A F Robertson Ltd | Construction | 2013 |
| A G Landscaping Services Ltd | Construction | 2017 |
| A Global Village Ltd | Professional & scientific | 2023 |
| A Good Decision Limited | Administrative & support | 2023 |
| A Group Suffolk Ltd | Real estate | 2021 |
| A Haulage Services Limited | Transport & logistics | 2014 |
| A I Style Limited | Households | 2007 |
| A J & K Properties Limited | Real estate | 2012 |
| A J Harris (Decorating & Home Improvements) Limited | Construction | 2003 |
| A J Kerry S&T Ltd | Construction | 2017 |
| A J Wright Consulting Limited | Information & communication | 2018 |
| A Jackaman Carpentry Limited | Construction | 2006 |
| A K Services (Suffolk) Ltd | Water & waste | 2013 |
| A L Racing Limited | Arts & recreation | 2011 |
| A M Collis Carpentry Ltd | Manufacturing | 2020 |
| A M Hedges Properties Limited | Real estate | 2008 |
| A M Stores Ipswich Ltd | Wholesale & retail | 2024 |
| A M Taylor Property Group Limited | Construction | 2019 |