| Dancris Ltd | Transport & logistics | 2021 |
| Danescroft Services Limited | Professional & scientific | 2008 |
| Danfast Limited | Wholesale & retail | 1983 |
| Danfo Transport Service Ltd | Transport & logistics | 2026 |
| Dangerous Derk Interactive Limited | Information & communication | 2014 |
| Daniel Alexander Auto Care Limited | Wholesale & retail | 2026 |
| Daniel George Transport Ltd | Transport & logistics | 2016 |
| Daniel Johannessen Limited | Professional & scientific | 2013 |
| Daniel Mcmullen Ltd | Information & communication | 2025 |
| Daniel Winiarski Transport Limited | Transport & logistics | 2017 |
| Daniela Photographer Ltd | Professional & scientific | 2025 |
| Danielaimternational Limited | Manufacturing | 2025 |
| Danielsautoshop Ltd | Wholesale & retail | 2025 |
| Danielslfie Ltd | Wholesale & retail | 2025 |
| Danilsonvbarbers Ltd | Other services | 2025 |
| Danish Discount Store Ltd | Wholesale & retail | 2026 |
| Danjan Ventures Ltd | Manufacturing | 2018 |
| Danjay Properties Ltd | Real estate | 2021 |
| Dans Mobile Tyres 24/7 Ltd | Wholesale & retail | 2025 |
| Dansom & Lane Limited | | 2011 |
| Danuema Innovations Ltd | Information & communication | 2026 |
| Dapa Consultancy Limited | Professional & scientific | 2025 |
| Dapper Barbers 1 Ltd | Other services | 2023 |
| Daqri Ltd | Real estate | 2020 |
| Darcies Delights Limited | Hospitality | 2025 |
| Dardania Limited | Wholesale & retail | 2015 |
| Darian Properties Ltd | Real estate | 2026 |
| Darius Driving Services Limited | Transport & logistics | 2016 |
| Dark Magic Limited | Wholesale & retail | 2014 |
| Darling Consultancy Ltd | Professional & scientific | 2024 |
| Darnley Whitecroft and Company Limited | Wholesale & retail | 2021 |
| Darren FOX Flooring Limited | Construction | 2014 |
| Darren Mullins Builders Limited | Construction | 2018 |
| Darts Cave Ltd | Manufacturing | 2025 |
| Daryl Burdon Ltd | Professional & scientific | 2019 |
| DAS Haus Property Ltd | Real estate | 2024 |
| Dasc Ltd | Construction | 2019 |
| Dasc Property Ltd | Real estate | 2026 |
| Dash Auto Locksmith Ltd | Other services | 2025 |
| Dash Investment Holdings Limited | Financial services | 2023 |
| Dashmart Ltd | Wholesale & retail | 2025 |
| Dastagir & Sons Ltd | Wholesale & retail | 2025 |
| DAT HV Mechanical Electrical Fitting Ltd | Energy | 2016 |
| Data Cool Ltd | Construction | 2025 |
| Data Facilities (Yorkshire) Limited | Professional & scientific | 2008 |
| Datacow Limited | Information & communication | 2020 |
| Datamark UK Limited | Manufacturing | 1995 |
| Datamark UK Properties Limited | Real estate | 2007 |
| Dave Basker Social Work Services Ltd | Health & social care | 2019 |
| Dave Ledger Quality Consultant Ltd | Professional & scientific | 2008 |
| Dave Smith Carpets Ltd | Wholesale & retail | 2017 |
| Dave Smith Property Ltd | Real estate | 2024 |
| Davenport Properties Ltd | Real estate | 2021 |
| David Adam Jones Design Limited | Arts & recreation | 2023 |
| David Allen Hairdressing Limited | Other services | 2011 |
| David John Sharman Limited | Information & communication | 2025 |
| David Kilby Health & Safety Limited | Professional & scientific | 2020 |
| David Thomlinson Plant Repairs Limited | Wholesale & retail | 2016 |
| David Ward Haulage Limited | Wholesale & retail | 2000 |
| David Waters Consulting Limited | Professional & scientific | 2013 |
| David William Bryan Productions Ltd | Arts & recreation | 2019 |
| David's Courier Ltd | Transport & logistics | 2023 |
| David's Machinery Ltd | Wholesale & retail | 2019 |
| Davies and Borg Property Lets Ltd | Households | 2026 |
| Davis Consultancy Services Limited | Professional & scientific | 2019 |
| Davpack Ltd | Hospitality | 2024 |
| Dawbers Interiors Ltd | Construction | 2025 |
| DAX Detailing Ltd | Administrative & support | 2025 |
| Daybid Ltd | Real estate | 2026 |
| Daymarine Ltd | Wholesale & retail | 2009 |
| Daymech Ltd | Professional & scientific | 2002 |
| Daze Coffee House Limited | Hospitality | 2025 |
| Dazz Hull Limited | Health & social care | 2016 |
| DB Campers Ltd | Manufacturing | 2025 |
| DB Engineering Site Services Ltd | Professional & scientific | 2025 |
| DB Site Welding Services Limited | Construction | 2020 |
| DB Structural Fabrications Ltd | Manufacturing | 2022 |
| DBA HR Solutions Limited | Real estate | 2007 |
| DBG Rentals & Hire Ltd | Real estate | 1954 |
| DBM AI Ltd | Information & communication | 2020 |
| DBS (Hull) Limited | Administrative & support | 2004 |
| DBS Construction (Hull) Ltd | Construction | 2026 |
| DBT Trading Ltd | Wholesale & retail | 2018 |
| DC Garage Ltd | Wholesale & retail | 2012 |
| DC Packaging Consultants Limited | Administrative & support | 2016 |
| DC Travel (Hull) Limited | Transport & logistics | 2020 |
| Dcdi Group Limited | Financial services | 2025 |
| DCE Donaldson Limited | Administrative & support | 2006 |
| DCE Group Limited | Professional & scientific | 1936 |
| DCE Limited | Professional & scientific | 1919 |
| Dcjh Holdings Limited | Financial services | 2024 |
| Dcmk Limited | Financial services | 2016 |
| DCR Automotive Services Ltd. | Wholesale & retail | 2016 |
| DCS One Holdings Ltd | Financial services | 2021 |
| DCT East Riding Ltd | Real estate | 2024 |
| DD Access Solutions Ltd | Construction | 2026 |
| DD Automotive & Engineering Ltd | Wholesale & retail | 2026 |
| DD Wind Services Ltd | Construction | 2026 |
| DDB Renewables Ltd | Professional & scientific | 2026 |
| DDP Hull Limited | Transport & logistics | 2000 |