| D H Digger Hire Limited | Administrative & support | 2022 |
| D H Entertainment Services Limited | Arts & recreation | 2022 |
| D J Loveless Property Maintenance Ltd | Construction | 2019 |
| D M G Timber Limited | Wholesale & retail | 2002 |
| D Norfolk Investments Ltd | Financial services | 2010 |
| D R Jordan R C Finishing Limited | Construction | 2014 |
| D S Means Limited | Agriculture & fishing | 2010 |
| D T Loose Shellfish Limited | Agriculture & fishing | 2013 |
| D Trading Services Limited | Wholesale & retail | 2015 |
| D&E Future Care Ltd | Health & social care | 2022 |
| D&T Lettings Limited | Real estate | 2026 |
| D&W Events Limited | Hospitality | 2024 |
| D-Squared Engineering Limited | Manufacturing | 2022 |
| D. a. Griggs Decorators Limited | Construction | 2004 |
| D. Payne Holdings Ltd | Real estate | 2018 |
| D.A. Seaman Ltd | Health & social care | 2002 |
| D.J.Projects Limited | Construction | 2011 |
| D.L.H. Commercials Ltd | Real estate | 2023 |
| D.L.H. Lease Holdings Limited | Real estate | 2026 |
| D.L.H. Property Maintenance Limited | Construction | 2009 |
| D4U Tower Court Limited | Construction | 2020 |
| DAA Media Limited | Information & communication | 2025 |
| Dafrelo Trading Ltd | Professional & scientific | 2022 |
| Daga Limited | Households | 1993 |
| Dagri Transport Limited | Transport & logistics | 2025 |
| Daisies Limited | Arts & recreation | 2025 |
| Daiviltis Ltd | Transport & logistics | 2018 |
| Daka Properties Ltd | Real estate | 2025 |
| Daly Construction & Building Services Limited | Construction | 2023 |
| Damara Ltd | Professional & scientific | 2019 |
| Damp Spot Ltd | Construction | 2026 |
| DAN FAB UK Ltd. | Manufacturing | 2014 |
| DAN Rust Builders Limited | Construction | 2017 |
| Danclad UK Limited | Construction | 2015 |
| Dandelion (East Anglia) Ltd | Wholesale & retail | 2024 |
| Dandoni Bookkeeping Services Ltd | Professional & scientific | 2019 |
| Dandy Gorilla Ltd | Wholesale & retail | 2026 |
| Daniel Hedges Limited | Administrative & support | 2021 |
| Daniel Sanderson Limited | Construction | 2008 |
| Daniels Travers & Co Limited | Professional & scientific | 2013 |
| Danlet Limited | Real estate | 2019 |
| Danty Partners Limited | Construction | 2023 |
| DAR Travel & Tourism UK Limited | Administrative & support | 2024 |
| Darcha Estates Ltd | Real estate | 2021 |
| Darcha Property Group Limited | Construction | 2025 |
| Dare Media Ltd | Information & communication | 2016 |
| Dark Art Norfolk Ltd | Arts & recreation | 2024 |
| Darson Build Ltd | Construction | 2017 |
| DAS Electrical Installations Limited | Construction | 2018 |
| DAS International Recycling Solution Limited | Manufacturing | 2024 |
| DAS Metal Ltd | Manufacturing | 2024 |
| DAS Polymers Ltd | Manufacturing | 2025 |
| DAS Real Estate Limited | Construction | 2025 |
| Data Driven Software Limited | Information & communication | 2019 |
| Dataficient Ltd | Information & communication | 2013 |
| Datalab Industries Ltd | Information & communication | 2024 |
| Daulat RAM Ltd | Manufacturing | 2024 |
| David Auker Jewellery Limited | Wholesale & retail | 2005 |
| David Brice Dog Behaviourist Limited | Other services | 2017 |
| David Hillier Pools Ltd | Administrative & support | 2017 |
| David Price Limited | Professional & scientific | 2002 |
| David Ward (Newton) Limited | Agriculture & fishing | 1961 |
| David Weaver-Pope Carpentry Limited | Construction | 2019 |
| Day & Co Estates Limited | Wholesale & retail | 2018 |
| Day & Co Investments Limited | Construction | 2022 |
| Daybuild Websites Ltd | Other services | 2020 |
| Daysecure Ltd | Administrative & support | 2012 |
| Dazzling Deep Cleaning Ltd | Administrative & support | 2026 |
| DB23 Ltd | Wholesale & retail | 2023 |
| DCF Safety Services Ltd | Construction | 2022 |
| DCI Entertainment Limited | Hospitality | 2024 |
| DCI Leisure Limited | Hospitality | 2024 |
| Dcsmg Limited | Real estate | 2026 |
| DE Havilland Gardens Management Company Limited | Households | 2004 |
| DE Silva Coaching Ltd | Administrative & support | 2024 |
| Dead Beat JOE Limited | Information & communication | 2015 |
| Deanscroft Investments Ltd | Financial services | 2025 |
| Debaka Ltd | Real estate | 2020 |
| Debonaire Homes Ltd | Real estate | 2019 |
| Decentralised Nodes Ltd | Information & communication | 2023 |
| Decis Limited | Professional & scientific | 2017 |
| Decorative Events (NKT) Limited | Hospitality | 2018 |
| DED PXL Ltd | Information & communication | 2025 |
| Deejays Tanker Service Limited | Extraterritorial | 2020 |
| Deepdale Farm Limited | Agriculture & fishing | 1964 |
| Deerfield Holdings Limited | Real estate | 2020 |
| Dell Crescent Residents Association Limited | Other services | 1988 |
| Delphi Limited | Arts & recreation | 1990 |
| Delta GAS Installations Ltd | Construction | 2022 |
| Delta Ground Maintenance Ltd | Administrative & support | 2022 |
| Dempsey Property Developments Ltd | Construction | 2024 |
| Deniz 22 Ltd | Hospitality | 2023 |
| Dennis & Pellizzaro Accountancy Services Limited | Professional & scientific | 2025 |
| Dentan Williams Limited | Construction | 2011 |
| Denver Ryston Limited | Households | 2022 |
| Deol (Norfolk) Limited | Health & social care | 2022 |
| Derek Miller Ltd | Wholesale & retail | 2022 |
| Dersingham Green Management Company Ltd | Households | 2001 |
| Destenicá Technologies UK Limited | Wholesale & retail | 2020 |
| Devrim Enterprises Limited | Real estate | 2017 |