| DAN Burrill Consulting Ltd | Professional & scientific | 2024 |
| DAN Goffin Consultancy Ltd | Other services | 2021 |
| DAN Greenway Ltd | Information & communication | 2006 |
| DAN Hudson Ltd | Education | 2017 |
| DAN Jacobs Limited | Professional & scientific | 2011 |
| DAN MOT & Services Ltd | Wholesale & retail | 2021 |
| DAN to Earth Electrical Ltd | Construction | 2022 |
| Dan's Auto Repair Norwich Ltd | Wholesale & retail | 2022 |
| Dana D a Ltd | Wholesale & retail | 2022 |
| Danailovv Limited | Transport & logistics | 2022 |
| Danc Trans Ltd | Transport & logistics | 2017 |
| Dance Devotion Limited | Arts & recreation | 2010 |
| Dance Educates Ltd | Education | 2014 |
| Dance House of Norwich Limited | Administrative & support | 2007 |
| Dancesteps Limited | Arts & recreation | 2003 |
| Dancing Horse Management Limited | Households | 2010 |
| Danco Building Services Limited | Construction | 2009 |
| Dandelion & Frog Ltd | Manufacturing | 2021 |
| Dandelion Property Management Ltd | Real estate | 2025 |
| Danecote House Limited | Real estate | 2019 |
| Danel Scientific Consultancy Ltd | Professional & scientific | 2020 |
| Danesgate Ltd | Professional & scientific | 2022 |
| Danforth Advisors UK Ltd. | Professional & scientific | 2023 |
| Danger Dare Ltd | Administrative & support | 2022 |
| Danger UK Limited | Manufacturing | 1996 |
| Daniel Anscombe Design Ltd | Professional & scientific | 2021 |
| Daniel Boast Engineers Surveyors and Tradesmen Ltd | Construction | 2020 |
| Daniel Company & Limited | Hospitality | 2017 |
| Daniel Farrow Hospitality & Leisure Ltd | Hospitality | 2019 |
| Daniel Georgiev Ltd | Transport & logistics | 2020 |
| Daniel Lacey Construction Limited | Wholesale & retail | 2011 |
| Daniel Salter Consultancy Limited | Wholesale & retail | 2015 |
| Daniela Espada Ltd | Information & communication | 2024 |
| Daniela Food Ltd | Hospitality | 2022 |
| Daniela Marchesi Consulting Ltd | Professional & scientific | 2026 |
| Daniels Construction Norfolk Ltd | Construction | 2026 |
| Daniels Plumbers Limited | Construction | 2003 |
| Daniels Properties Holdings Limited | Construction | 2019 |
| Daniels Properties Limited | Construction | 2014 |
| Danino-Taidi Limited | Health & social care | 2014 |
| Danisprint Ltd | Transport & logistics | 2025 |
| Danny Mills Limited | Extraterritorial | 2002 |
| Dannylee Aesthetics Ltd | Health & social care | 2018 |
| Dannytechuk Ltd | Other services | 2015 |
| Danoli Solutions Ltd | Other services | 2005 |
| Dantean Limited | Real estate | 1977 |
| Dantech Engineering Ltd | Manufacturing | 2003 |
| Daphne Metland Consulting Limited | Arts & recreation | 2007 |
| Dapper Dogs Grooming Ltd | Other services | 2008 |
| Dapper FOX Group Ltd | Information & communication | 2018 |
| Dapple Investors Ltd | Financial services | 2019 |
| Dara IT Solutions Ltd | Information & communication | 2019 |
| Darcy George Consultants Limited | Administrative & support | 2017 |
| Dardan Building Services Ltd | Construction | 2006 |
| Dardania Illyria Limited | Professional & scientific | 2019 |
| Dare Advisory & Intelligence Ltd | Professional & scientific | 2026 |
| Daren Taylor Building Ltd | Construction | 2025 |
| Daria 2025 Ltd | Hospitality | 2025 |
| Darin Barber Ltd | Other services | 2022 |
| Darley Abbey Village Stores Limited | Wholesale & retail | 2015 |
| Darlington House Hotels Limited | Real estate | 1964 |
| Darlston Ltd | Professional & scientific | 2014 |
| Darper Properties Ltd | Real estate | 2022 |
| Darren Chapman Property Group Ltd | Real estate | 2025 |
| Darren Hunter Limited | Financial services | 2019 |
| Darren Hunton Plumbing and Heating Ltd | Construction | 2025 |
| Darren James Consultancy Ltd | Information & communication | 2014 |
| Darren Rudd Services Ltd | Mining & quarrying | 2013 |
| Darsi Studio Ltd | Manufacturing | 2022 |
| Darsun Limited | Real estate | 2019 |
| Dart Property Company Limited | Real estate | 1993 |
| Dart Superstore Ltd | Wholesale & retail | 2025 |
| Dartmouth Laundry and Linen Hire Limited | Other services | 2018 |
| Darwin AV Services Limited | Professional & scientific | 2010 |
| Darwin Court Residents Management Company Limited | Households | 2016 |
| Darwins Portfolio Ltd | Real estate | 2024 |
| DAS Auto Norwich Limited | Wholesale & retail | 2011 |
| Dash Taxis Ltd | Transport & logistics | 2022 |
| Data Flow & Insights Limited | Professional & scientific | 2019 |
| Data Inspires Limited | Information & communication | 2013 |
| Data Privacy Matters Ltd | Extraterritorial | 2020 |
| Data Protection Enterprise Limited | Professional & scientific | 2018 |
| Data Reporting Solutions Ltd | Information & communication | 2022 |
| Data Traceid (Europe) Limited | Manufacturing | 2001 |
| Data Vision Services Ltd | Professional & scientific | 2021 |
| DATA2EDUCATE Ltd | Professional & scientific | 2018 |
| Datadot Technology (UK) Limited | Manufacturing | 2001 |
| Dataglot Limited | Information & communication | 2019 |
| Datamark Marking Systems Limited | Wholesale & retail | 2025 |
| Datanorfolk Ltd | Information & communication | 2013 |
| Datapaq Limited | Manufacturing | 1983 |
| Dataqual Ltd | Mining & quarrying | 2013 |
| Datasight Ltd | Information & communication | 2023 |
| Datocampol’S Group Ltd | Hospitality | 2024 |
| Dave Barry Ltd | Transport & logistics | 2013 |
| Dave Price Services Ltd | Education | 2025 |
| Dave Rigby Limited | Wholesale & retail | 2007 |
| Davely Ltd | Transport & logistics | 2024 |
| Daveney Limited | Professional & scientific | 1997 |
| Daventry School of Motoring Limited | Education | 2006 |