| Crafting Market Ltd | Wholesale & retail | 2017 |
| Crafty Craft Place Limited | Arts & recreation | 2024 |
| Crawley Forest Products Limited | Real estate | 1993 |
| Cripps Developments Holdings Limited | Financial services | 2021 |
| Cripps Developments Limited | Construction | 2000 |
| Cross Properties (Lowestoft) Ltd | Real estate | 2021 |
| Cucumber COW Limited | Agriculture & fishing | 2014 |
| Cunningham Auction Consultancy Ltd | Real estate | 2020 |
| Cwtch Catering Ltd | Hospitality | 2026 |
| D Steward Groundworks & Water Contractors Limited | Construction | 2014 |
| D T Services 30 Limited | Mining & quarrying | 2016 |
| D W B Mechanical Services Ltd | Wholesale & retail | 2020 |
| D W Fairhead Limited | Administrative & support | 2008 |
| D.S. Watson Civil Engineering (Anglia) Limited | Construction | 1974 |
| D2 Hair Skin & Beauty Ltd | Other services | 2025 |
| Daemon Bull Ltd | Wholesale & retail | 2019 |
| Darren Austin Limited | Wholesale & retail | 2024 |
| Davey Sheds Ltd | Manufacturing | 2015 |
| David Adcroft Arbitration and Consultancy Services Limited | Professional & scientific | 2018 |
| Daylight Churchill Limited | Real estate | 2016 |
| Daylight Contracting Limited | Construction | 2018 |
| Daylight Nelson House Limited | Construction | 2016 |
| DB Automation Limited | Extraterritorial | 2009 |
| DCI NET Electrical Contractors Ltd | Construction | 2016 |
| DCI NET Red Limited | Administrative & support | 2016 |
| DCI NET Renewables Ltd | Construction | 2023 |
| Dcinet Ltd | Construction | 2010 |
| DDC Automation Ltd | Manufacturing | 2012 |
| Decorative Renovation Limited | Construction | 2022 |
| Desborough Estates Ltd | Real estate | 2012 |
| Devitt & Sons Limited | Construction | 2008 |
| DI Rollo (Holdings) Limited | Financial services | 2021 |
| Dial-A-Tv (Rentals) Limited | Extraterritorial | 2009 |
| Dial-A-Tv Limited | Extraterritorial | 2013 |
| Diamond CUT Beccles Ltd | Other services | 2024 |
| Digital Clef Limited | Manufacturing | 2017 |
| Dinacato International Freight Forwarding Services Ltd | Transport & logistics | 2018 |
| Dingle Marsh Barns Dunwich Limited | Hospitality | 2017 |
| Divity Health Ltd | Information & communication | 2020 |
| DKS Removals Ltd | Transport & logistics | 2020 |
| Dockblast Ltd | Manufacturing | 2010 |
| Docs-To-Data Ltd | Administrative & support | 2015 |
| Donny's Tyres Limited | Other services | 2017 |
| Dorset Freeholders Limited | Households | 2012 |
| Drake Engineering Limited | Construction | 2009 |
| Drcm Consulting Ltd | Public administration | 2023 |
| DW Group (Anglia) Limited | Financial services | 2021 |
| DW Holdings (Anglia) Ltd | Financial services | 2019 |
| Dynamic Buildings Limited | Professional & scientific | 2024 |
| E J LAY Investment Ltd | Real estate | 2018 |
| Eade Hawkes Limited | Real estate | 2023 |
| EAR Care Centre Norwich Limited | Health & social care | 2016 |
| East Anglian Pianos Limited | Manufacturing | 2026 |
| East Anglian Wills & Estate Planning Limited | Administrative & support | 2020 |
| East Coast Accountancy Limited | Professional & scientific | 2023 |
| East Coast Accountants Limited | Professional & scientific | 2022 |
| East Coast Vehicle Rescue Ltd | Transport & logistics | 2017 |
| East Point Wealth Management Ltd | Financial services | 2015 |
| East Suffolk Aviation Ltd | Education | 2021 |
| East Suffolk Properties Limited | Real estate | 2021 |
| Eastern Estimating Ltd | Construction | 2024 |
| Eastway Pallets Ltd | Administrative & support | 2003 |
| Easy Tiger Beccles Limited | Hospitality | 2024 |
| Eavox Ltd | Real estate | 2021 |
| Eccles Equestrian Ltd | Transport & logistics | 2015 |
| Echris Limited | Wholesale & retail | 2016 |
| Eclipse Electrical Solutions Ltd | Construction | 2017 |
| Ecoflue Limited | Construction | 2005 |
| Ecom Vault Ltd | Professional & scientific | 2024 |
| Ecurie 137 Limited | Administrative & support | 2016 |
| Edge Computer Solutions Limited | Information & communication | 2014 |
| Edge Graphics Ltd | Professional & scientific | 2025 |
| Edge Noko Limited | Hospitality | 2026 |
| Edwards Compliance Consultancy Limited | Professional & scientific | 2014 |
| EEL Films Limited | Information & communication | 2012 |
| Eileen Crisp Court Management Company Limited | Real estate | 2007 |
| EJL Anaesthesia Limited | Health & social care | 2019 |
| EKP Productions Limited | Arts & recreation | 2008 |
| Electroplate (UK) Limited | Manufacturing | 2001 |
| Ella Sopp Media Limited | Professional & scientific | 2017 |
| Ellis Properties (Barsham) Limited | Real estate | 2022 |
| Ellough Feedstocks Ltd | Agriculture & fishing | 2016 |
| Elmbid Limited | Construction | 1985 |
| Elms Meadow Ltd | Hospitality | 2021 |
| Elmswood Kitchens and Interiors Ltd | Construction | 2025 |
| Emdr Services Ltd | Health & social care | 2026 |
| Emerald Autoservices Limited | Wholesale & retail | 2002 |
| Emma Beverley Ltd | Health & social care | 2026 |
| Engel Enterprises Limited | Health & social care | 2023 |
| Entragen Ltd | Professional & scientific | 2020 |
| Epic Brands Limited | Wholesale & retail | 2025 |
| Epsom Downs Limited | Professional & scientific | 2014 |
| ET Wind Technician Ltd | Construction | 2025 |
| Ethereal EGO Ltd | Wholesale & retail | 2025 |
| European Squirrel Initiative | Agriculture & fishing | 2003 |
| Excalibur Halls Limited | Real estate | 2005 |
| Exploration Electronics Holdings Ltd | Financial services | 2018 |
| Exploration Electronics Limited | Professional & scientific | 1982 |
| Family Finance Centre Group Ltd | Financial services | 2015 |
| Family First Legal Ltd | Professional & scientific | 2021 |