| David Alston (Norfolk) Limited | Agriculture & fishing | 1955 |
| David Bullen Properties (UK) Limited | Real estate | 2007 |
| David Harrowven Ltd | Professional & scientific | 1997 |
| David Neve Building Contractor Limited | Construction | 1989 |
| David Peachey Electrical and Mechanical Limited | Construction | 2008 |
| David Utting Engineering Ltd | Manufacturing | 2004 |
| David Venni Photography Limited | Professional & scientific | 2000 |
| David West Limited | Construction | 2003 |
| Dempsey Heating Limited | Construction | 1996 |
| Denis Tuttle Architecture Limited | Professional & scientific | 2007 |
| Dereham Country Garage Limited | Extraterritorial | 1987 |
| Derek Powley Services Limited | Manufacturing | 2002 |
| Derma Consultant Limited | Health & social care | 2023 |
| Dersingham Building & Contracting Company,Limited | Construction | 1946 |
| Desira Holdings PLC | Wholesale & retail | 2002 |
| Desira Norfolk Limited | Wholesale & retail | 1988 |
| Deuba Ltd | Wholesale & retail | 2021 |
| Diglea Caravan Park Ltd | Hospitality | 2005 |
| Diss Catering Limited | Hospitality | 1995 |
| Diss Medical Centre Limited | Real estate | 2005 |
| Diss Publishing Company Limited(The) | Wholesale & retail | 1925 |
| Dissauto Ltd | Wholesale & retail | 2023 |
| Dissauto Motors Ltd | Wholesale & retail | 2024 |
| Divine Spice Ltd | Hospitality | 2025 |
| Doffer Ltd | Wholesale & retail | 2024 |
| Dolls House Beauty Co Ltd | Other services | 2022 |
| Dopson Consultancy Limited | Professional & scientific | 2006 |
| Dovetail Carpets Ltd | Administrative & support | 1996 |
| Downham Building Supply Co. Limited | Wholesale & retail | 1969 |
| Downham Petroleum Company Limited | Wholesale & retail | 1999 |
| Downham Plant Services Limited | Construction | 2007 |
| Dpsmn Limited | Education | 2009 |
| DS Consultancy (UK) Limited | Professional & scientific | 2006 |
| Dunhams of Norwich | | 2006 |
| DYY Group Limited | Transport & logistics | 2025 |
| E C S Computers Limited | Manufacturing | 1989 |
| E. Moore (Joinery) Limited | Wholesale & retail | 1966 |
| E.J.W. Computer Distributors Limited | | 1984 |
| E.U. Limited | Wholesale & retail | 1982 |
| EA Assist Limited | Professional & scientific | 2007 |
| East Anglia Yacht Surveys Limited | Professional & scientific | 2005 |
| East Anglian Aviation Services Ltd | Transport & logistics | 2026 |
| East Anglian Driveability Limited | Health & social care | 1991 |
| East Anglian Motor Auctions (Norwich) Limited | Wholesale & retail | 1958 |
| East Anglian Valves & Engineering Services Limited | Transport & logistics | 1988 |
| East Midlands Pickleball Limited | Arts & recreation | 2025 |
| Eastern Cash Registers (Norwich) Limited | Wholesale & retail | 1975 |
| Eastern Industrial Plant Ltd | Administrative & support | 2005 |
| Eastwood Catering Equipment & Consulting Ltd | Manufacturing | 2004 |
| Eco Building Contractors Limited | Construction | 2007 |
| Ecoprogress Limited | Professional & scientific | 1991 |
| Edmonds Property Services Limited | Construction | 2001 |
| Edwin Seaman Farms Limited | Agriculture & fishing | 1946 |
| Elecsure Limited | Construction | 1993 |
| Elveden Developments Limited | Extraterritorial | 2004 |
| Elveden Housing Limited | Extraterritorial | 2004 |
| Elveden Produce Limited | Wholesale & retail | 2006 |
| ELY Building & Maintenance Services Limited | Construction | 2006 |
| Embrace Property Developments Limited | Other services | 2018 |
| Emporium Pine Limited | Wholesale & retail | 2004 |
| Empson Electrical Ltd | Construction | 2025 |
| Engineering FAB Weld Limited | Professional & scientific | 2003 |
| Engineering Support Practice Ltd | Professional & scientific | 2004 |
| Ensign Photographic Company Limited | Professional & scientific | 1980 |
| Enterprise Veterinary Services Limited | Professional & scientific | 2011 |
| Eric Bates & Sons Ltd | Manufacturing | 2000 |
| Ertan Catering Ltd | Hospitality | 2013 |
| ESF One LLP | | 2011 |
| ESF Three LLP | | 2011 |
| ESF Two LLP | | 2011 |
| Esther 3D Consultancy Ltd | Administrative & support | 2018 |
| Eurodiesel Limited | Professional & scientific | 1976 |
| Euroquake Ltd | Professional & scientific | 2003 |
| Evans (Instruments) Limited | Manufacturing | 1991 |
| Evenwind Limited | | 1972 |
| EW Fine Arts Limited | Arts & recreation | 2018 |
| Exclusive Africa Limited | Administrative & support | 2002 |
| EYLUL06 Limited | Hospitality | 2025 |
| F J Clabon Potatoes Limited | Agriculture & fishing | 2004 |
| F.W. Myhill and SON Limited | Wholesale & retail | 1954 |
| Fabrican Engineering Limited | Manufacturing | 1997 |
| Fairgreen Garages Limited | Real estate | 1957 |
| Fairhead Bradford Accountants Limited | Professional & scientific | 2006 |
| Fakenham Racecourse Limited | Arts & recreation | 1965 |
| Fastfit Exhausts Limited | Wholesale & retail | 1978 |
| Fasting Chick Group Holdings Ltd | Real estate | 2025 |
| Fatso's Restaurants Ltd | Professional & scientific | 2006 |
| Fatso's Speakeasy Ltd | Hospitality | 2006 |
| Feilden + Mawson LLP | | 2001 |
| Fern Estates Limited | Construction | 1999 |
| Findafashion Limited | Wholesale & retail | 2006 |
| Finecalm Limited | Real estate | 1984 |
| Finney of Gaywood Limited | Construction | 2002 |
| Firetek Limited | Administrative & support | 1999 |
| First AID Training Associates Ltd | Education | 2006 |
| First Self Drive Limited | Administrative & support | 2005 |
| Fisherbullen Limited | Construction | 1943 |
| Fit 4 Office Limited | Professional & scientific | 2003 |
| Flanbio Limited | Information & communication | 1983 |
| Flavour of Stalham Ltd | Hospitality | 2025 |