| DSW Groundworks Limited | Construction | 2018 |
| DT Home Improvements Ltd | Construction | 2021 |
| DTS East Limited | Manufacturing | 2007 |
| Duane Rackham Limited | Information & communication | 2009 |
| Duarte Holiday Home Ltd | Hospitality | 2025 |
| Dubamaskin Ltd | Professional & scientific | 2025 |
| DUE East Media Limited | Professional & scientific | 2016 |
| Dufinkle Limited | Agriculture & fishing | 2019 |
| Duibhai Ltd | Hospitality | 2025 |
| Duke of Marlborough (EA) Ltd | Hospitality | 2023 |
| Dummett Copp LLP | | 2010 |
| Dummett Copp Services Limited | Professional & scientific | 2009 |
| Dunblue Ltd | Information & communication | 2007 |
| Duncan Consulting Ltd | Professional & scientific | 2023 |
| Duncan Woodburn Ltd | Professional & scientific | 2021 |
| Duncrue Security Distribution Limited | Wholesale & retail | 2003 |
| Duneways Property Co. Limited | Real estate | 1975 |
| Dunlin Rentals Ltd | Real estate | 2002 |
| Dunster Street Management Limited | Households | 2020 |
| Dunstone Optometry Limited | Wholesale & retail | 2018 |
| Dunthorne Cottage Ltd | Real estate | 2024 |
| Dunwell Motor Group (Ipswich) Ltd | Wholesale & retail | 2022 |
| Dunwich Cottage Holidays Ltd. | Hospitality | 2000 |
| Dunwoody Technology Ltd | Information & communication | 2012 |
| Dunya Kitchen Accessories Ltd | Wholesale & retail | 2026 |
| Dupricom Group Ltd | Administrative & support | 2022 |
| Dura Payroll Group Ltd | Construction | 2023 |
| Durapack Ltd | Wholesale & retail | 2019 |
| Durham Ventures Ltd | Wholesale & retail | 2012 |
| Durrant Riley Advisory Limited | Professional & scientific | 2025 |
| Dusenbery Europe Limited | Extraterritorial | 2013 |
| Dusters and Drills Limited | Administrative & support | 2024 |
| Duzgun Properties Limited | Other services | 2016 |
| Duzzami Ltd | Wholesale & retail | 2025 |
| Dvog Services Ltd | Professional & scientific | 2024 |
| Dvonswe Ltd | Wholesale & retail | 2025 |
| DVP Restorations Limited | Wholesale & retail | 2013 |
| Dvsl Transport Ltd | Transport & logistics | 2025 |
| DW Marine Consultants Ltd | Professional & scientific | 2020 |
| DWA Urban Design Limited | Professional & scientific | 2022 |
| Dwellstar Living Limited | Real estate | 2018 |
| DWR Concerts Ltd | Arts & recreation | 2018 |
| DY Trans Limited | Transport & logistics | 2019 |
| Dylan Byrne Coaching Ltd | Health & social care | 2023 |
| DYM Holdings Limited | Hospitality | 2004 |
| DYNAM1C Limited | Wholesale & retail | 2020 |
| Dynamic Force Limited | Financial services | 2017 |
| Dynamic Project Developments Limited | Construction | 2018 |
| Dynamic Responses Software Limited | Information & communication | 2019 |
| Dynamican 2 Limited | Professional & scientific | 2010 |
| Dynamican Ltd. | Professional & scientific | 2002 |
| Dynamite Sports Consultants Limited | Arts & recreation | 2024 |
| Dynamixsports Ltd | Education | 2026 |
| Dynas Investments Limited | Extraterritorial | 2021 |
| Dynas Ltd | Wholesale & retail | 2015 |
| Dynasty Transport Limited | Transport & logistics | 2014 |
| DZ Construction Ltd | Construction | 2021 |
| DZD Solutions Ltd | Professional & scientific | 2026 |
| D’Eez Café Ltd | Hospitality | 2025 |
| E & EO Solutions Limited | Transport & logistics | 2017 |
| E & G Silav Ltd | Wholesale & retail | 2026 |
| E & J’S Boutique Limited | Wholesale & retail | 2025 |
| E a P Services Limited | Professional & scientific | 2000 |
| E C Consultants (East Anglia) Limited | Professional & scientific | 2011 |
| E H Ipswich Ltd | Wholesale & retail | 2024 |
| E J R Surgery Limited | Health & social care | 2013 |
| E Jacobs & Sons Limited | Manufacturing | 2007 |
| E K Consulting Ltd | Professional & scientific | 2024 |
| E Maricevas Limited | Transport & logistics | 2020 |
| E&E Recruitment Ltd | Administrative & support | 2025 |
| E&I Drywall Ltd | Construction | 2020 |
| E&J Fire and Security Limited | Administrative & support | 2003 |
| E-Marketing Technologies Limited | Financial services | 2020 |
| E. J Fosker Planning Limited | Professional & scientific | 2013 |
| E. L. Construction Limited | Construction | 1982 |
| E. Rand & Sons Limited | Manufacturing | 1980 |
| E. T. Clark & SON Limited | Construction | 2012 |
| E.B.J. & Co. (Hadleigh) Limited | | 1974 |
| E.D.A. Logistics Ltd | Transport & logistics | 2023 |
| E.P.S. Anglia Limited | Wholesale & retail | 2007 |
| E.R.F. Landscapes Limited | Administrative & support | 2003 |
| E.Y.E. Lifting Limited | Extraterritorial | 2005 |
| E.Y.E. Marine Limited | Wholesale & retail | 2005 |
| E5 Food Ltd | Financial services | 2024 |
| EA Bright Ltd | Real estate | 2025 |
| EA Fire Limited | Public administration | 2022 |
| EA Roofing Limited | Construction | 2014 |
| Eaba UK Limited | Administrative & support | 2019 |
| EAC Supplies & Solutions Ltd | Wholesale & retail | 2025 |
| Eagle Deliveries Ltd | Transport & logistics | 2023 |
| Eagle Freight Terminal Limited | Transport & logistics | 1990 |
| Eagle Global Trading Limited | Wholesale & retail | 2009 |
| Eagle Groceries Express Ltd | Wholesale & retail | 2025 |
| Eagle Properties (UK) Limited | Real estate | 2010 |
| Eagle Surveillance and Security Ltd | Information & communication | 2025 |
| Eamc Holdings Ltd | Financial services | 2025 |
| Earl Solutions Ltd | Professional & scientific | 2018 |
| Earlmain Limited | Households | 1990 |
| Earlsborne Limited | Information & communication | 2025 |
| Early Bird Developments Limited | Construction | 2004 |