| Damien Stokes Ltd | Professional & scientific | 2024 |
| Damost Retail Ltd | Wholesale & retail | 2025 |
| Damson Ace Ltd | Households | 2021 |
| DAN Pro Corp Ltd | Wholesale & retail | 2024 |
| DAN Transport 2024 Ltd | Transport & logistics | 2024 |
| Dancefest | Education | 2001 |
| Dancing MAD Ltd | Information & communication | 2024 |
| Dandelion ZT Ltd | Hospitality | 2025 |
| Dandelions Nursery School Ltd | Education | 2018 |
| Danesbury House Limited | Extraterritorial | 2020 |
| Danesbury Limited | Hospitality | 2020 |
| Daniel Daniels Public Relations Consultants Limited | Professional & scientific | 2017 |
| Danielle Construct Limited | Construction | 2026 |
| Danmund Delivery Limited | Transport & logistics | 2024 |
| Danvic Properties Limited | Real estate | 2020 |
| Danzig Manchester Limited | Real estate | 2021 |
| Dapv Limited | Wholesale & retail | 2012 |
| Dart Communications Limited | Information & communication | 2001 |
| Dash Cover Ltd | Financial services | 2018 |
| Data Guides Group Limited | Information & communication | 2025 |
| Datacom Industries Ltd | Information & communication | 2013 |
| Datimcare Service Ltd | Health & social care | 2025 |
| Dattanna Ltd | Health & social care | 2022 |
| Dave Hillbrook Consulting Ltd | Professional & scientific | 2023 |
| Dave's Workwear Limited | Manufacturing | 2025 |
| David Chapman Ltd | Professional & scientific | 2020 |
| David Curnock Limited | Transport & logistics | 1964 |
| David Felton Photography Limited | Professional & scientific | 2013 |
| David Fielding Services Limited | Mining & quarrying | 2005 |
| David Holland Architect Ltd | Professional & scientific | 2019 |
| David Hoult Limited | Other services | 2002 |
| David Humphreys Consulting Ltd | Professional & scientific | 2021 |
| David Hunt (North Devon) Limited | Hospitality | 1998 |
| David Jones Property Expert Ltd | Real estate | 2023 |
| David Rowberry Art Works Ltd | Professional & scientific | 2008 |
| David Warburton Consulting Ltd | Professional & scientific | 2026 |
| Davidpriceracing.Com Limited | Professional & scientific | 2021 |
| Davies Electrical Worcestershire Ltd | Construction | 2024 |
| Davies Plumbing Heating Ltd | Construction | 2023 |
| Davis Construct Limited | Construction | 2026 |
| Davis Towler Property Ltd | Real estate | 2025 |
| DAW Resources Ltd | Hospitality | 2025 |
| DAW Securities Limited | Financial services | 2026 |
| DAW Ventures Ltd | Hospitality | 2025 |
| Dawes Associates Limited | Extraterritorial | 2013 |
| DB Drive Ltd | Transport & logistics | 2025 |
| DB DRY Cleaning and Laundry Ltd | Other services | 2025 |
| DB Smart Repairs Ltd | Wholesale & retail | 2021 |
| DBI Works Ltd | Professional & scientific | 2025 |
| DC Base Ltd | Construction | 2017 |
| DCH Estates Partnership LLP | | 2017 |
| DCH Estates Project Co. Limited | Construction | 2018 |
| Dcharmonised Ltd | Professional & scientific | 2023 |
| DCS Special Projects Ltd | Transport & logistics | 2025 |
| DD & TD Ltd | Professional & scientific | 2018 |
| DD Aquarium Developments Ltd | Wholesale & retail | 2018 |
| DD Imports Ltd | Wholesale & retail | 2016 |
| DDC Dezzdotcom Ltd | Professional & scientific | 2009 |
| Ddoddle Limited | Construction | 2024 |
| Ddp&S Limited | Professional & scientific | 2006 |
| DDR Hire Ltd | Administrative & support | 2020 |
| Ddwit Ltd | Information & communication | 2026 |
| DE Electronics Limited | Professional & scientific | 2019 |
| DE Lacy Executive Limited | Administrative & support | 2016 |
| DE Lisle Design Ltd | Information & communication | 2026 |
| Dealhart Limited | Real estate | 2002 |
| Deanfield (Shipton Under Wychwood) Management Company Limited | Households | 2018 |
| Deansgate House Limited | Other services | 2025 |
| Deansway Regeneration Limited | Construction | 2019 |
| Decent Packaging Ltd | Administrative & support | 2018 |
| Decorum Interior Design Ltd | Professional & scientific | 2017 |
| Dedicated to Education Limited | Education | 2007 |
| Deeway Ltd | Wholesale & retail | 2023 |
| Defined by KR Ltd | Other services | 2025 |
| Delighted Properties Ltd | Households | 2024 |
| Delivery Concepts Ltd | Professional & scientific | 2016 |
| Delta Hardiman Limited | Professional & scientific | 2013 |
| Delta Launch Ltd | Professional & scientific | 2024 |
| Delta Property Ltd | Real estate | 2020 |
| Deltacom I.T. Limited | Information & communication | 1999 |
| Deltech UK STS Limited | Other services | 2005 |
| Demo SOS (Strip OUT Solutions) Ltd | Construction | 2016 |
| Democonstruct Ltd | Transport & logistics | 2024 |
| DEMOCRACIA84 CIC | Professional & scientific | 2025 |
| Dene Communications Systems Ltd | Professional & scientific | 2016 |
| Denham Hedley Commercials Limited | Wholesale & retail | 2012 |
| Denham Property Development Ltd | Construction | 2026 |
| Denis Hair Ltd | Other services | 2024 |
| Denver Fast Food Ltd | Hospitality | 2025 |
| Dependable Home Care Services Limited | Health & social care | 2017 |
| Derbyshire & Robbins Improvements Ltd | Construction | 2023 |
| Dero Fabrication Limited | Manufacturing | 2000 |
| Derrick Morgan (Construction) Limited | Wholesale & retail | 1973 |
| Derwent Family Holdings Limited | Financial services | 2025 |
| Desat Ltd | Financial services | 2024 |
| Design 29 Limited | Administrative & support | 1999 |
| Design Bank Studios Limited | Professional & scientific | 2019 |
| Design Eighty Eight Eight Limited | Wholesale & retail | 2003 |
| Design Religion Limited | Professional & scientific | 2003 |
| Designer Equestrian Ltd | Wholesale & retail | 2022 |