| Dhanvika Retail Limited | Wholesale & retail | 2025 |
| Dialbeam Properties Limited | Real estate | 1984 |
| Diamond Property Services EA Ltd | Real estate | 2019 |
| Diamond Winners Limited | Wholesale & retail | 2025 |
| Dilo Limited | Hospitality | 2024 |
| Dinky Town Limited | Other services | 2016 |
| DINO2HIRE Ltd | Arts & recreation | 2021 |
| Discount Boilers East Anglia Limited | Professional & scientific | 2020 |
| Discount Fencing Limited | Construction | 2025 |
| Disney Properties Limited | Real estate | 2016 |
| District Care Ltd | Health & social care | 2013 |
| District Roofing Limited | Construction | 2019 |
| District Services Limited | Construction | 2011 |
| DIY Distribution Ltd | Wholesale & retail | 2019 |
| DJ Family Properties Ltd | Real estate | 2025 |
| DJ Renewables Ltd | Professional & scientific | 2025 |
| DJM Holdings (Suffolk) Limited | Real estate | 2021 |
| DJM Plumbing & Heating Limited | Construction | 2011 |
| DJT Logistics Limited | Information & communication | 2008 |
| DK Fibreglass Works Ltd | Construction | 2020 |
| DKP Group Ltd | Construction | 2019 |
| DLH Steel Services Ltd | Construction | 2024 |
| DM Brown Ltd | Real estate | 2025 |
| DMG Resolution Ltd | Construction | 2026 |
| Dmjs Property Management Ltd | Households | 2022 |
| Dmjs UK Limited | Real estate | 2008 |
| Dmt.Groupmaintenance Ltd | Construction | 2022 |
| Dobstrainingclub Limited | Education | 2026 |
| DOE Metal Recycling Limited | Water & waste | 2006 |
| Domestic Asbestos Surveys Limited | Professional & scientific | 2015 |
| Domina Fortuna Ltd | Administrative & support | 2025 |
| Doran's Multi-Services Ltd | Transport & logistics | 2025 |
| Dotty's Bistro Ltd | Hospitality | 2026 |
| Double Dutch Holdings Limited | Financial services | 2025 |
| Double Glazing Doctor (East Anglia) Limited | Construction | 2009 |
| Downvile Limited | Real estate | 2016 |
| DP Renovations (East Anglia) Limited | Construction | 2023 |
| DR Ying Acupuncture Research Ltd | Education | 2019 |
| Dragon Evolution Ltd | Information & communication | 2021 |
| Dragon Woman Limited | Real estate | 2017 |
| Dragonfly Decorators Limited | Extraterritorial | 2021 |
| Drej M Car Sales and Transport Ltd | Wholesale & retail | 2026 |
| Drew Care Limited | Health & social care | 2000 |
| Drew Services Limited | Professional & scientific | 2024 |
| Drivewright Ltd | Education | 2023 |
| DS Vista Properties Ltd | Real estate | 2025 |
| Dsenergy Holdings Ltd | Extraterritorial | 2023 |
| Dttc Limited | Hospitality | 2025 |
| Dub-X Ltd | Professional & scientific | 2026 |
| Duende Properties Ltd | Real estate | 2016 |
| Dunne Enterprises Limited | Real estate | 1999 |
| Dunne Property Management Limited | Real estate | 2023 |
| Dunx Cycles Limited | Wholesale & retail | 2015 |
| Dusden Ltd | Hospitality | 2017 |
| Dylanns News Limited | Wholesale & retail | 2014 |
| Dynamic Drilling Tools Ltd | Professional & scientific | 2018 |
| Dynamic Leisure Management Limited | Real estate | 2020 |
| E a Franchise Ltd | Arts & recreation | 2023 |
| E R S Marine Services Limited | Real estate | 1996 |
| E.W. Jermy Limited | Agriculture & fishing | 1975 |
| EA Compressors Solution Ltd | Manufacturing | 2014 |
| EA Energy Services Ltd | Administrative & support | 2026 |
| EA Gymnastics CIC | Education | 2026 |
| Ea-Web Limited | Information & communication | 2011 |
| Eacs-Pp Limited | Financial services | 2018 |
| EAR Care Lowestoft Limited | Health & social care | 2026 |
| Early Dawn Windows & Conservatories Limited | Construction | 1999 |
| Earthreach UK & Europe Limited | Construction | 2019 |
| Easel Ltd | Arts & recreation | 2003 |
| East Anglia Cleaning Services Limited | Administrative & support | 1988 |
| East Anglia Coaching Limited | Education | 2019 |
| East Anglia Electrical Installations Limited | Construction | 2010 |
| East Anglia Flooring Limited | Construction | 2016 |
| East Anglia Packaging Ltd | Manufacturing | 2023 |
| East Anglia Real Estate Limited | Construction | 2016 |
| East Anglia Renovations Ltd | Construction | 2023 |
| East Anglia Roller Shutters Ltd | Construction | 2019 |
| East Anglia Signs Ltd | Manufacturing | 2022 |
| East Anglia Tool & Plant Hire Ltd | Administrative & support | 2025 |
| East Anglia Transport Museum Trading Limited | Arts & recreation | 2023 |
| East Anglia Yarn Festival Ltd | Arts & recreation | 2022 |
| East Anglian Computer Supplies Limited | Manufacturing | 1984 |
| East Anglian Electrical Contractors Limited | | 1959 |
| East Anglian Events Group Ltd | Hospitality | 2024 |
| East Anglian Signs Ltd | Manufacturing | 2022 |
| East Coast Administration Limited | Public administration | 2011 |
| East Coast Advisory Ltd | Professional & scientific | 2025 |
| East Coast Ambulance Service Ltd | Health & social care | 2022 |
| East Coast Boat Building Services Limited | Manufacturing | 2024 |
| East Coast Boatbuilders Limited | Manufacturing | 2024 |
| East Coast Care Ltd | Health & social care | 2022 |
| East Coast Community Healthcare C.I.C. | Health & social care | 2011 |
| East Coast Drains Limited | Water & waste | 2006 |
| East Coast Fisheries Liaison Limited | Agriculture & fishing | 2017 |
| East Coast Funerals Limited | Other services | 2015 |
| East Coast Golf Holdings Ltd | Financial services | 2025 |
| East Coast Ground Care Ltd | Financial services | 2022 |
| East Coast Heating and Plumbing Services Limited | Construction | 2002 |
| East Coast Holding Ltd | Professional & scientific | 2013 |
| East Coast Interiors (East Anglia) Limited | Construction | 2014 |