| DD Services (East Anglia) Ltd | Construction | 2019 |
| Dean Banyard Limited | Construction | 2008 |
| Defy Reality Entertainment UK Ltd | Information & communication | 2025 |
| Design Technology International Limited | Professional & scientific | 1997 |
| Dgmd Property Ltd | Real estate | 2024 |
| Discoveryscapes Limited | Administrative & support | 2023 |
| Djaj Property Ltd | Real estate | 2019 |
| DNB Projects Ltd | Professional & scientific | 2022 |
| DR. Bump (South East) Limited | Wholesale & retail | 2005 |
| Drenchd Group Ltd | Manufacturing | 2026 |
| Duke Bros Limited | Hospitality | 2003 |
| Dutch Dressage Limited | Agriculture & fishing | 2024 |
| E-Commerce Regulations Simplified Limited | Professional & scientific | 2017 |
| East Terms Limited | Administrative & support | 2018 |
| Eastwood Commercials Ltd | Wholesale & retail | 2024 |
| Edvica Limited | Wholesale & retail | 2020 |
| Eleanor Sykes Consultancy Limited | Education | 2018 |
| Elevator Maintenance Company Ltd | Manufacturing | 2021 |
| Ellison Business Services Ltd | Administrative & support | 2003 |
| Emily Bentley Shots Ltd | Hospitality | 2026 |
| Engineering and Technical Procurement Services Ltd | Professional & scientific | 2012 |
| Entellectual Services Ltd | Information & communication | 2006 |
| Escape Ipswich Limited | Arts & recreation | 2017 |
| Essex and Suffolk Fire Works Ltd | Wholesale & retail | 2023 |
| Essex Carpet Sales Limited | Wholesale & retail | 1987 |
| Essex Contract Flooring Limited | Wholesale & retail | 2006 |
| ETM Consultancy Ltd | Professional & scientific | 2026 |
| Eurograin (U.K.) Limited | Administrative & support | 1977 |
| Feigenbaum Software Ltd | Extraterritorial | 2009 |
| Felixstowe Spa Beach HUT Limited | Administrative & support | 2024 |
| FHB Ventures Ltd | Financial services | 2025 |
| Filtertec Holdings Limited | Professional & scientific | 2008 |
| Filtertec Systems Ltd | Water & waste | 2004 |
| First 4 Feet (UK) Ltd | Health & social care | 2024 |
| Flint Barn Interior Joinery Ltd | Construction | 2022 |
| Fluffy Moon Limited | Wholesale & retail | 2023 |
| Fork Kitchen & Deli Ltd | Wholesale & retail | 2020 |
| Frasers Guest House Ltd | Hospitality | 2017 |
| Frasers Tearooms Ltd | Hospitality | 2017 |
| Fredhug Ltd | Professional & scientific | 2024 |
| Frontier Creative Ltd | Professional & scientific | 2023 |
| FTW Property Ltd | Professional & scientific | 2020 |
| G & T East Anglia Ltd | Construction | 2012 |
| G and K Ingram Holdings Limited | Financial services | 2025 |
| G. Duke & Sons Limited | Construction | 1985 |
| G3 Capital Limited | Financial services | 2026 |
| Gauranga Estates Limited | Real estate | 2024 |
| Genesis Growth Ltd | Professional & scientific | 2022 |
| Geoserve Consulting Ltd | Professional & scientific | 2023 |
| Gipping Gundogs Limited | Agriculture & fishing | 2020 |
| GLG Sustainability Ltd | Professional & scientific | 2024 |
| Gloves & Glory Limited | Administrative & support | 2016 |
| Go Logistics Holdings Limited | Transport & logistics | 2026 |
| Go Ministries Limited | Other services | 2011 |
| Gray Works Ltd | Construction | 2024 |
| Greater Minds Limited | Information & communication | 2008 |
| GS Group Limited | Financial services | 2023 |
| GT Capital Partners Limited | Professional & scientific | 2020 |
| Guymer King Limited | Professional & scientific | 2013 |
| H J Commercials & Auditing Ltd | Wholesale & retail | 2024 |
| H.H. Hopson & Company Ltd | Administrative & support | 2022 |
| Hadleigh & Thundersley Cricket Club Ltd | Hospitality | 2022 |
| Hadleigh Chamber of Commerce C.I.C. | Other services | 2013 |
| Hadleigh EYE & Hearing Centre Limited | Wholesale & retail | 2020 |
| Hadleigh Glass Limited | Manufacturing | 2000 |
| Hadleigh Infants and Nursery School (Academy) | Education | 2011 |
| Hadrian Safety Rails Limited | Other services | 2011 |
| Hanlon Harding Ltd | Professional & scientific | 2016 |
| Happier Homecare Ltd | Health & social care | 2026 |
| Hardway Services Ltd | Professional & scientific | 2013 |
| Healthy Living Network Ltd | Health & social care | 2024 |
| Hestur Limited | Professional & scientific | 2011 |
| HG Trade Limited | Construction | 2012 |
| Hilltrax Plant Ltd | Manufacturing | 2017 |
| Hire an RV (GBR) Ltd | Transport & logistics | 2023 |
| Hire an RV Ltd | Administrative & support | 2021 |
| HJ Structural Engineers Limited | Professional & scientific | 2019 |
| HOK Investments Ltd | Financial services | 2024 |
| Holwins Competitions Limited | Administrative & support | 2025 |
| HOM Property Limited | Real estate | 2020 |
| Home Farm Close Maintenance (2025) Ltd | Extraterritorial | 2025 |
| Homedean Limited | Other services | 2023 |
| Hori Ltd | Construction | 2026 |
| House to Home Property Refurbishments Ltd | Real estate | 2013 |
| Howling Products Ltd | Wholesale & retail | 2023 |
| Hybrid Mechanical Ltd | Construction | 2010 |
| Icollege Education Ltd | Education | 2024 |
| Ignat Ltd | Transport & logistics | 2011 |
| Integrity Automotive Limited | Wholesale & retail | 2015 |
| Investeq Holdings Limited | Financial services | 2019 |
| Ipswich & Suffolk Estates Limited | Real estate | 2005 |
| Ipswich & Suffolk Property Management Limited | Real estate | 2012 |
| Ipswich Financial Services Limited | Financial services | 2003 |
| Ipswich Grab Hire Limited | Administrative & support | 2005 |
| Izods Pens Limited | Wholesale & retail | 2017 |
| J & D Paving Essex Ltd | Administrative & support | 2025 |
| J & M Beauty LLP | | 2020 |
| J W Carpentry Essex Ltd | Manufacturing | 2026 |
| Jarvis Building Contractors Ltd | Construction | 2021 |
| Jarvis Cosmetic Developments Ltd. | Manufacturing | 1978 |