| Delta Fire Limited | Manufacturing | 1990 |
| Delta Four Next GEN Ltd | Education | 2026 |
| Delta Four Skatepark CIC | Wholesale & retail | 2022 |
| Deltascope.Com Limited | Information & communication | 2008 |
| Deltec Engineering Ltd | Professional & scientific | 2025 |
| Delux Dental Ltd | Health & social care | 2023 |
| Deluxe Norwich Ltd | Other services | 2022 |
| Delve Interactive Limited | Information & communication | 2014 |
| Delycam Ltd | Transport & logistics | 2024 |
| Demajoy Ltd | Administrative & support | 2017 |
| Demarborough Ltd | Administrative & support | 2023 |
| Dementia Signage Ltd | Manufacturing | 2021 |
| Demetrio Milea Ltd | Health & social care | 2025 |
| Demirci Properties Ltd | Real estate | 2023 |
| Demirci's Fish Bar Ltd | Hospitality | 2022 |
| Demograffix Ltd | Construction | 2025 |
| Demon Recruitment Group Limited | Administrative & support | 2003 |
| Demould Solutions Ltd | Professional & scientific | 2023 |
| Demstrip Services Limited | Construction | 2018 |
| Demure Dogs Ltd | Agriculture & fishing | 2025 |
| DEN Jackson Solutions Limited | Administrative & support | 2001 |
| Dencora (57KBR) Limited | Real estate | 2023 |
| Dencora (Browick Business Park) Limited | Real estate | 2010 |
| Dencora (Browick Road) Limited | Real estate | 2010 |
| Dencora (Watford) LLP | | 2014 |
| Dencora 2000 Limited | Real estate | 2000 |
| Dencora Barnard Road LLP | | 2007 |
| Dencora Carrow Road LLP | | 2007 |
| Dencora Construction Limited | Real estate | 2001 |
| Dencora Dereham Retail Partnership LLP | | 2004 |
| Dencora Developments Limited | Construction | 2014 |
| Dencora Estates Limited | Real estate | 2001 |
| Dencora House Management Company Limited | Real estate | 2005 |
| Dencora Investments LLP | | 2005 |
| Dencora Mason Road LLP | | 2006 |
| Denethorpe Limited | Transport & logistics | 2009 |
| DENIS2010 Limited | Transport & logistics | 2018 |
| Denison Clark Ltd | Administrative & support | 2015 |
| Denke Medical Ltd | Manufacturing | 2013 |
| Denmark Convenience Store Ltd | Wholesale & retail | 2025 |
| Denmark Property Management Limited | Real estate | 2013 |
| Dennington Electrical Contractors Ltd | Construction | 2015 |
| Dennis Deliveries Limited | Transport & logistics | 2013 |
| Dennis E. Smith (Norwich) Limited | Construction | 1962 |
| Denny's Motor Company Limited | Manufacturing | 2021 |
| Dentacation Ltd | Education | 2020 |
| Dental Art Ceramics Ltd | Health & social care | 2003 |
| Dental Art Ceramics Properties Limited | Real estate | 2018 |
| Dentee Ltd | Health & social care | 2024 |
| Dentiko Limited | Health & social care | 2024 |
| Denton Management Group Limited | Professional & scientific | 2021 |
| DEO Orthopaedics Limited | Health & social care | 2016 |
| Depaty 24 Health Care Ltd | Health & social care | 2024 |
| Deptford Days Ltd | Real estate | 2025 |
| Deraed Limited | Manufacturing | 2019 |
| Derand Limited | Construction | 2002 |
| Derby Ritz Ltd | Hospitality | 2019 |
| Derbyshirefoods Ltd | Hospitality | 2025 |
| Dereham Medical Supplies Ltd | Wholesale & retail | 2025 |
| Dereham Neatherd Road Maltings Management Company Limited | Households | 1992 |
| Dereham Pharma Ltd | Wholesale & retail | 2025 |
| Dereham Road Chippy Ltd | Hospitality | 2024 |
| Derek Ingram Homes Limited | Construction | 1995 |
| Derek Ingram Limited | Construction | 1971 |
| Derivateq Ltd | Professional & scientific | 2021 |
| Derma Clinic Aesthetics Group Ltd | Other services | 2026 |
| Dermaesthetica Limited | Health & social care | 2020 |
| Dermal Elegance Aesthetics Ltd | Health & social care | 2025 |
| Dermalase Ltd | Other services | 2023 |
| Dermatology Dermatosurgery & Aesthetics Limited | Health & social care | 2025 |
| Dermot Barry Farrier Limited | Agriculture & fishing | 2002 |
| Derowa Ltd | Health & social care | 2025 |
| Derrett Consultancy Ltd | Professional & scientific | 2018 |
| DES Middleton Property Services Ltd | Construction | 2013 |
| Desert Hope Limited | Administrative & support | 2023 |
| Desert Island Dishes Ltd | Information & communication | 2023 |
| Desi Flavourz Limited | Hospitality | 2025 |
| Design and Plan Ltd | Administrative & support | 2007 |
| Design and Project Management Services Ltd | Professional & scientific | 2018 |
| Design Audit Limited | Professional & scientific | 2006 |
| Design by Vine Limited | Professional & scientific | 2018 |
| Design Furniture Limited | Wholesale & retail | 2013 |
| Design Heating Ltd | Construction | 2025 |
| Design House Norwich Ltd. | Wholesale & retail | 2012 |
| Design Smith Ltd | Manufacturing | 2025 |
| Design Stone Works Limited | Construction | 2007 |
| Design Vertigo Limited | Information & communication | 2007 |
| Designer Lock UP Ltd | Wholesale & retail | 2020 |
| Designg Limited | Manufacturing | 2022 |
| Designkey Ltd | Professional & scientific | 2018 |
| Desire Cosmetic Shop Ltd | Other services | 2018 |
| Deskbed Limited | Manufacturing | 2016 |
| Deskstack Ltd | Wholesale & retail | 2026 |
| Desres Limited | Households | 1997 |
| Destination Holdings Ltd | Extraterritorial | 2022 |
| Destinations Innovation Ltd | Professional & scientific | 2022 |
| Destinyvapes Ltd | Wholesale & retail | 2025 |
| Deus Mecum EST Limited | Health & social care | 2015 |
| Deux-Elles Limited | Information & communication | 1998 |
| DEV Bhumi UK Limited | Hospitality | 2023 |