| Courier Link 24/7 Limited | Transport & logistics | 2011 |
| Covell Construction Limited | Construction | 2008 |
| Covell Developments Limited | Construction | 2019 |
| COX & Danks Limited | Extraterritorial | 2012 |
| CR Enterprises 2000 Limited | Professional & scientific | 2001 |
| Cressfield Limited | Professional & scientific | 2019 |
| CRF Tuning Ltd | Wholesale & retail | 2026 |
| Crisp Surfacing Consultants Ltd | Construction | 2023 |
| Croft Meadow (Necton) Management Company Limited | Households | 2019 |
| Crown Empire Ltd | Wholesale & retail | 2025 |
| Crown Inn Trunch Ltd | Wholesale & retail | 2025 |
| Cuesports and Darts East CIC | Arts & recreation | 2025 |
| Curds Hall Barn Limited | Other services | 2020 |
| D to 3D Ltd | Professional & scientific | 2012 |
| Dairy Management Systems Ltd | Professional & scientific | 2003 |
| Dana Lodges Ltd | Hospitality | 2020 |
| Danish Domestic Services Ltd | Extraterritorial | 2015 |
| Dawson Building Contractors Limited | Construction | 2014 |
| Deane Southwest Ltd | Mining & quarrying | 2015 |
| Dental Fill-In Ltd | Health & social care | 2018 |
| Dereham Construction Limited | Construction | 2019 |
| Derek Hales (Plumbing Contractors) Limited | Construction | 1974 |
| Derexi Management Services Ltd | Professional & scientific | 2024 |
| Dermaguru Limited | Health & social care | 2023 |
| Dimension Brickwork Ltd | Construction | 2022 |
| Distinctive Ltd | Wholesale & retail | 2015 |
| DJB Electrical Services Ltd | Construction | 2012 |
| DLS Engineering Limited | Manufacturing | 2014 |
| DME Limited | Professional & scientific | 2025 |
| Dolly Dusters Cleaning & Laundry Limited | Administrative & support | 2025 |
| Dolly Dusters Limited | Administrative & support | 2011 |
| Dorky Pigeon Ltd | Wholesale & retail | 2026 |
| DPG Tech Services Limited | Construction | 2014 |
| DPT Commercial Ltd | Wholesale & retail | 2023 |
| Dunnett Consulting Limited | Administrative & support | 2020 |
| Dunnett Properties Limited | Real estate | 2022 |
| Dunthorne Parker Architects Limited | Professional & scientific | 2014 |
| Dunthorne Parker Services Limited | Construction | 1985 |
| E & T Property Investments Limited | Construction | 2016 |
| E-Gurney Ltd | Manufacturing | 2022 |
| EA Radiology Consultancy Group Ltd | Health & social care | 2020 |
| Earth Panda Creations Ltd | Wholesale & retail | 2023 |
| East Anglia Retro Furniture (UK) Limited | Wholesale & retail | 2019 |
| East Anglian Builders Limited | Construction | 2025 |
| East Coast Residential Properties Ltd | Real estate | 2025 |
| East Coast Sunrise CIC | Arts & recreation | 2023 |
| East Garden Chinese Restaurants Limited | Hospitality | 2016 |
| Eastern Drainage Services Ltd | Construction | 2010 |
| EC Personnel Ltd | Administrative & support | 2017 |
| EC Properties Norfolk Ltd | Real estate | 2024 |
| Eddie Figg Facilities Management Ltd | Construction | 2023 |
| EDG Car Sales Limited | Wholesale & retail | 2008 |
| EGW (East) Psychology Services Ltd. | Health & social care | 2010 |
| Eichinger Equipment Ltd | Construction | 2011 |
| EJ Enterprises Ltd | Hospitality | 2021 |
| EJ Operations Ltd | Hospitality | 2025 |
| Elderman Enterprise Limited | Arts & recreation | 2024 |
| Elecselect Limited | Construction | 2014 |
| Elecsoft Limited | Administrative & support | 2002 |
| Elecsoft Solutions Ltd | Administrative & support | 2018 |
| Electric Aviation Group Ltd | Professional & scientific | 2017 |
| Electrician Magician Limited | Construction | 2020 |
| Elite Property Improvements (UK) Limited | Construction | 2012 |
| Ellis Construction Management Services Ltd | Construction | 2010 |
| Emmerson Energy & Engineering Ltd | Professional & scientific | 2026 |
| Empire Adventure Limited | Real estate | 2024 |
| Enclave 3806 Limited | Extraterritorial | 2015 |
| Encore Norfolk Limited | Real estate | 2026 |
| Enhance (Norfolk) Limited | Administrative & support | 2022 |
| Epic Fitness and Coaching Ltd | Arts & recreation | 2021 |
| Essential Safety & Environmental Solutions Limited | Professional & scientific | 2009 |
| Essi MSO (UK) Limited | Administrative & support | 2025 |
| Estate Managers (Surrey) Ltd | Professional & scientific | 2013 |
| Evercrest Agriculture Ltd | Wholesale & retail | 2024 |
| Evergreen SEN Consultancy Limited | Education | 2023 |
| Excel Engineering UK Limited | Manufacturing | 2007 |
| Executive Lifestyle Planning Ltd | Financial services | 2011 |
| Exige Interiors Ltd | Construction | 2024 |
| Expert Response Training Ltd | Education | 2024 |
| F & L Studios Limited | Arts & recreation | 2018 |
| Fakenham Fires Ltd | Construction | 2012 |
| Fakenham GAS Centre Limited | Wholesale & retail | 2003 |
| Fallow Construction Ltd | Construction | 2015 |
| Fedro Investments Limited | Administrative & support | 2017 |
| Feel Financial Services Limited | Financial services | 2018 |
| Feyz Property Ltd | Real estate | 2019 |
| Fides Associates Limited | Extraterritorial | 2014 |
| Fides Financial Management Limited | Extraterritorial | 2023 |
| Fides Limited | Financial services | 2015 |
| Field & Garden Limited | Wholesale & retail | 2002 |
| Financial Design Limited | Extraterritorial | 2003 |
| Fire & Industrial Personal Protective Equipment Limited | Professional & scientific | 2001 |
| First Klass Property Improvements Ltd | Construction | 2020 |
| Flexion Global Limited | Wholesale & retail | 2014 |
| Floodsense Limited | Construction | 2011 |
| Fordham Landscapes Limited | Real estate | 2003 |
| Fordham Lettings Limited | Real estate | 2024 |
| Forever Norfolk Limited | Hospitality | 2021 |
| Formedium Limited | Manufacturing | 2002 |
| Founding Drinks Ltd | Manufacturing | 2017 |