| Diss Ironworks Limited | Wholesale & retail | 2003 |
| Diss Kebab Limited | Hospitality | 2025 |
| Diss Masonic Club Limited | Other services | 2001 |
| Diss Mini Market Ltd | Wholesale & retail | 2020 |
| Diss Motorcycle Club Limited | Arts & recreation | 1985 |
| Diss Rugby Club Limited | Arts & recreation | 2015 |
| Diss Scaffolding Holdings Ltd | Financial services | 2017 |
| Diss Scaffolding Services Ltd | Construction | 2011 |
| Diss Securities Limited | Financial services | 2018 |
| Diss Telecom Limited | Information & communication | 2022 |
| Diss Town Football Club Development Company Limited | Construction | 1980 |
| Diss Tyres Limited | Wholesale & retail | 2025 |
| Diss Van Centre Ltd | Wholesale & retail | 2008 |
| Diss Vehicle Contracts Ltd | Administrative & support | 2021 |
| Diss, Thetford and District Citizens Advice Bureau | Other services | 2001 |
| DJ Pro Catering Ltd | Hospitality | 2024 |
| Django's Pet Services Limited | Other services | 2022 |
| DJP Traffic Solutions Ltd | Construction | 2026 |
| DL Creations Ltd | Manufacturing | 2022 |
| DLK Consultants Limited | Professional & scientific | 2014 |
| DR Group Ltd | Manufacturing | 2003 |
| Dragon Palace ( Norfolk ) Ltd | Hospitality | 2023 |
| Drax IT Limited | Information & communication | 2012 |
| Driftways Glamping Ltd | Hospitality | 2021 |
| DRY Hire Lighting Limited | Administrative & support | 2003 |
| DT Investments UK Limited | Financial services | 2025 |
| Ductstation Ltd | Energy | 2015 |
| Duffin and Daughters Ltd | Real estate | 2016 |
| Dunckley Country Services Limited | Transport & logistics | 2017 |
| Dunhill Farm Limited | Agriculture & fishing | 2015 |
| Dunhill Farm Pigs Limited | Agriculture & fishing | 2021 |
| Duramite Limited | Manufacturing | 1989 |
| DVP Projects Ltd | Construction | 2021 |
| DVS Ltd | Wholesale & retail | 2003 |
| E R Ling & Sons Limited | Agriculture & fishing | 1996 |
| E. S. Cole and Sons (Holdings). | Financial services | 1988 |
| E.S. Cole and Sons Limited | Agriculture & fishing | 1987 |
| E23KIEL Limited | Professional & scientific | 2018 |
| EAH Developments Limited | Construction | 2024 |
| EAH Investments Limited | Real estate | 2024 |
| Earl Soham Brewery Limited | Manufacturing | 2003 |
| East Anglia Domestic Cleaning Limited | Administrative & support | 2015 |
| East Anglia Homes Ltd | Real estate | 2022 |
| East Anglian Building Consultancy Ltd | Other services | 2017 |
| East Engineering Solutions Ltd | Manufacturing | 2022 |
| East Hope Haven Ltd | Health & social care | 2011 |
| East Living Wattisfield Limited | Construction | 2023 |
| East Machine Hire Ltd | Administrative & support | 2024 |
| East of England Veterinary Specialists Limited | Professional & scientific | 2017 |
| Eastern Fencing & Timber Supplies Ltd | Wholesale & retail | 2016 |
| Eastern Western Limited | Real estate | 2021 |
| Easy-Init Limited | Manufacturing | 1971 |
| Ebidders Limited | Extraterritorial | 2004 |
| Echopause Limited | Real estate | 1986 |
| Eco-Nomic Insulation Ltd | Wholesale & retail | 2007 |
| Eco-Pipe Shell Ltd | Wholesale & retail | 2020 |
| Edgar Farmhouse Ltd | Hospitality | 2014 |
| Edge Cctv Ltd | Extraterritorial | 2007 |
| Eduwin Learning Services (ELS) Limited | Education | 2015 |
| Edwards Enterprises(Uk) Ltd | Hospitality | 2011 |
| Eemc Limited | Wholesale & retail | 2015 |
| Efzen Limited | Wholesale & retail | 2021 |
| Eggs Networking Ltd | Administrative & support | 2025 |
| Eight 71 Ltd | Real estate | 2025 |
| EJ Consultancy Ltd | Professional & scientific | 2025 |
| EJN Associates Limited | Professional & scientific | 2014 |
| Elecsecure Ltd | Energy | 2012 |
| Elite Exterior Spaces Suffolk Ltd | Administrative & support | 2021 |
| Elite Rocking Horses Limited | Wholesale & retail | 2021 |
| Elite Saddlery Limited | Wholesale & retail | 2016 |
| Elitexnt Ltd | Professional & scientific | 2025 |
| Elmlake MGA Limited | Financial services | 2024 |
| ELS Projects Limited | Professional & scientific | 2022 |
| Elwyn Barton Homes Ltd | Construction | 2017 |
| Endell Veterinary Group Limited | Professional & scientific | 2012 |
| Ender Energy Limited | Professional & scientific | 2025 |
| Endure Civil Engineering Limited | Construction | 2025 |
| Enjoy EAT Pizza Ltd | Construction | 2019 |
| Entreprix Limited | Arts & recreation | 1987 |
| EP Engineering Limited | Wholesale & retail | 2012 |
| Equinity Investments Limited | Administrative & support | 2013 |
| Eras Holdings Limited | Professional & scientific | 2004 |
| Eras Limited | Professional & scientific | 1984 |
| Esora London Limited | Extraterritorial | 2023 |
| Essex Tax Services Ltd | Professional & scientific | 2007 |
| Ethelreda Drive Management Company Limited | Real estate | 2008 |
| Eufloria Limited | Manufacturing | 2025 |
| Ewings Consultancy Ltd | Real estate | 2024 |
| EXCELR8 Motorsport Engineering Ltd | Manufacturing | 2018 |
| Executive Blood Lines Limited | Administrative & support | 1998 |
| Expert Transporter Ltd | Transport & logistics | 2024 |
| Express Bodyshop Lowestoft Limited | Wholesale & retail | 2024 |
| Express Diss Taxis Limited | Transport & logistics | 2018 |
| Express Va's Ltd | Administrative & support | 2022 |
| Extra Mile Group Ltd | Transport & logistics | 2021 |
| EYE Registrars Limited | Administrative & support | 1990 |
| EYE Show Limited | Extraterritorial | 1999 |
| Eyesurge Limited | Health & social care | 2015 |
| Ezerche Limited | Hospitality | 2025 |
| F-B Projects (Guildford) Ltd | Construction | 2018 |