| Dubweld Services and Repairs Ltd | Wholesale & retail | 2025 |
| Dunnett Group Ltd | Wholesale & retail | 2024 |
| Dusty Roads Campers Ltd | Wholesale & retail | 2026 |
| Dusty Roads Limited | Manufacturing | 2024 |
| Dwello Hub Ltd | Information & communication | 2024 |
| Dynacam Limited | Manufacturing | 2024 |
| E - Success Limited | Information & communication | 2002 |
| E C Engineering Ltd | Construction | 2023 |
| E J Wright & Co Ltd | Professional & scientific | 2013 |
| E.R. & R.T. Rackham Limited | Wholesale & retail | 1957 |
| Earth.Org Worldwide Ltd | Information & communication | 2020 |
| East Anglia Community Homes Limited | Construction | 2018 |
| East Anglia Crane Services Ltd | Manufacturing | 2018 |
| East Anglia Group Ltd | Construction | 2022 |
| East Anglian Concrete Supplies Limited | Manufacturing | 2022 |
| East Anglian Pest Control Limited | Extraterritorial | 2009 |
| East Anglian Property Maintenance Ltd | Households | 2024 |
| East Anglian Schools Trust Ltd | Education | 2011 |
| East Coast Homes Limited | Construction | 2014 |
| East Coast Property (UK) Limited | Construction | 2015 |
| East Coast Removals Ltd | Transport & logistics | 2015 |
| East Coast Vehicles Limited | Wholesale & retail | 2021 |
| East Green Energy Limited | Construction | 2007 |
| East Suffolk Construction Services Limited | Construction | 2019 |
| East Suffolk Holdings Limited | Financial services | 2019 |
| East Suffolk Produce Ltd | Agriculture & fishing | 2013 |
| East Suffolk Property Developments Limited | Construction | 2019 |
| East Suffolk Property Investments Limited | Real estate | 2019 |
| East Suffolk Services Limited | Water & waste | 2022 |
| East Suffolk Water Abstractors Ltd | Agriculture & fishing | 2003 |
| Eastedge Capital Ltd | Financial services | 2017 |
| Eastern Property Contracts Limited | Real estate | 1999 |
| Easton Events Company Limited | Arts & recreation | 1994 |
| Easton Grange Limited | Other services | 2011 |
| Easton Park Estate Limited | Agriculture & fishing | 2026 |
| Easton White Horse Limited | Hospitality | 2012 |
| Eastwave Limited | Wholesale & retail | 2014 |
| Easy Cabs Suffolk Ltd | Transport & logistics | 2026 |
| Easy Living Homes Limited | Real estate | 2008 |
| EAT at Grange Farm Ltd | Hospitality | 2024 |
| EB Projects Ltd | Wholesale & retail | 2012 |
| Econdata Limited | Information & communication | 2016 |
| Ecosy Build Ltd | Construction | 2020 |
| Eden Rose Developments Limited | Real estate | 2005 |
| Eden Rose Investments Limited | Financial services | 2015 |
| Edenlab Ltd | Arts & recreation | 2012 |
| Edenlabs International Limited | Administrative & support | 2019 |
| Edwin Avenue 1970 Limited | Extraterritorial | 2014 |
| Effective Advertising Gifts Limited | Professional & scientific | 1992 |
| Efficura Solutions Limited | Information & communication | 2024 |
| Egenie Ltd | Extraterritorial | 2015 |
| EHB International Horse Transport Limited | Transport & logistics | 2016 |
| Eithne Leming Associates Ltd | Education | 2014 |
| Ejhaesthetics Ltd | Other services | 2020 |
| Electronic Terminations Limited | Manufacturing | 1977 |
| Elger & Co. Limited | Professional & scientific | 1999 |
| Elignum Ltd | Information & communication | 2013 |
| Elise Equestrian Ltd | Agriculture & fishing | 2021 |
| Ellimar Limited | Information & communication | 2013 |
| Elliott Black Design Limited | Professional & scientific | 2026 |
| Elmhurst Developments Limited | Construction | 2020 |
| Elsom Spettigue Associates Limited | Real estate | 2001 |
| Elton Murphy Limited | Wholesale & retail | 2013 |
| Embraceit Limited | Information & communication | 2004 |
| Emerald Road Management Limited | Real estate | 2017 |
| Emery Data Solutions Limited | Professional & scientific | 2025 |
| Endurance Media Group Ltd | Professional & scientific | 2019 |
| Engineering & Turbine Consultancy Limited | Professional & scientific | 2014 |
| Enterprise AI Executive Limited | Information & communication | 2026 |
| Envie Green Limited | Professional & scientific | 2013 |
| EPC Management Services Ltd | Professional & scientific | 2025 |
| EPC Marketing Ltd | Professional & scientific | 2010 |
| Equal Studio Limited | Administrative & support | 2008 |
| Equanimity Estates Ltd | Construction | 2022 |
| Escape Velocity Theatre Ltd | Professional & scientific | 2024 |
| Essen Deli Ltd | Wholesale & retail | 2021 |
| Essexio Ltd | Administrative & support | 2015 |
| Estragon Limited | Administrative & support | 2016 |
| Etincelle Inns Ltd | Hospitality | 2011 |
| ETON66 Design Limited | Arts & recreation | 2006 |
| Evelyn Jacks Ltd | Other services | 2025 |
| Evenstrabridge Limited | Hospitality | 1963 |
| Everyday Leader Limited | Professional & scientific | 2017 |
| Evolve Construct Ltd | Construction | 2017 |
| Evolve Lifetime Ltd | Financial services | 2018 |
| Excel Charter Aviation Limited | Manufacturing | 2020 |
| Excel Charter Limited | Transport & logistics | 2000 |
| Extreme Clean Suffolk Ltd | Administrative & support | 2025 |
| Ezirent Limited | Administrative & support | 2023 |
| F G Weller Holdings Limited | Real estate | 2019 |
| F J Pawsey Limited | Construction | 2020 |
| FAB Training & Management Ltd | Professional & scientific | 2024 |
| Facilities Management Ltd | Administrative & support | 2020 |
| Fairbank & Evans Developments Limited | Construction | 2021 |
| Fairbank Enterprises Limited | Extraterritorial | 2015 |
| Fairo Ltd | Real estate | 2026 |
| Famra Solar Ltd | Professional & scientific | 2011 |
| Fanny and Frank Ltd | Wholesale & retail | 2004 |
| Farrow & Shorten Engineering Ltd | Professional & scientific | 2021 |
| FAS South Suffolk Ltd | Professional & scientific | 2003 |