| DESIGN970 Ltd | Professional & scientific | 2019 |
| Designer Connect Ltd | Wholesale & retail | 2026 |
| Designer Pick Limited | Wholesale & retail | 2021 |
| Designer Travel Limited | Wholesale & retail | 2007 |
| Desirable Dens Ltd | Construction | 2021 |
| Desire Healthcare Services Ltd | Information & communication | 2020 |
| Desire Trading Ltd | Wholesale & retail | 2021 |
| DESSERTS2YOU Ltd | Hospitality | 2025 |
| Detailking Ltd. | Wholesale & retail | 2015 |
| Detox Bar Ltd | Wholesale & retail | 2019 |
| Devcon Services Limited | Professional & scientific | 2018 |
| Developee Limited | Construction | 2025 |
| Developments MCR UK Ltd | Construction | 2021 |
| Deviasi Ltd | Wholesale & retail | 2024 |
| Devonhurst Lettings Limited | Real estate | 2019 |
| Dewan Couriers Ltd | Transport & logistics | 2024 |
| Dewy & Fresh Makeup Bar Limited | Manufacturing | 2025 |
| DF Property Services Ltd | Construction | 2024 |
| DG Fleet Support Ltd | Extraterritorial | 2024 |
| DG Interiors NW Ltd | Wholesale & retail | 2024 |
| Dghe Limited | Administrative & support | 2020 |
| DGI Investment Limited | Wholesale & retail | 2025 |
| DGS Executive Travel Limited | Transport & logistics | 2019 |
| DH and S Holdings Limited | Financial services | 2023 |
| Dhanif Properties Ltd | Real estate | 2026 |
| DHK Sports Limited | Arts & recreation | 2025 |
| Diabeease Limited | Wholesale & retail | 2024 |
| Dial-A-Chem Ltd | Professional & scientific | 2022 |
| Diamond Car Wash PVT Ltd | Administrative & support | 2024 |
| Diamond Care Properties Ltd | Health & social care | 2022 |
| Diamond Fusing and Heating Ltd | Wholesale & retail | 1995 |
| Diamond Healthcare Agency Ltd | Professional & scientific | 2022 |
| Diamond Recycling Ltd | Water & waste | 2020 |
| Diamond Resin Ltd | Construction | 2025 |
| Diamond Stone International Ltd | Financial services | 2023 |
| Diazwatson Limited | Information & communication | 2019 |
| Dice Technologies Ltd | Wholesale & retail | 2025 |
| Diesel Power Technologies Ltd | Wholesale & retail | 2010 |
| Digby Productions Ltd | Professional & scientific | 2026 |
| Diggle Blues Festival Limited | Arts & recreation | 2010 |
| Diggle Dog Fields Ltd. | Other services | 2024 |
| Diggle Motor Services Limited | Wholesale & retail | 2007 |
| Diggle Village Store Limited | Wholesale & retail | 2013 |
| Diggle-Brook Management Co. Limited | Households | 1983 |
| Digital Automation Training Limited | Education | 2003 |
| Digital Contracts Management Limited | Professional & scientific | 1999 |
| Digital Data Cloud Ltd | Information & communication | 2025 |
| Digital Edge Print Group Ltd | Manufacturing | 2020 |
| Digital Goal MAX Ltd | Wholesale & retail | 2023 |
| Digital Lilly Ltd | Information & communication | 2018 |
| Digital Phoenix Media Ltd | Information & communication | 2019 |
| Digital Prints and Supplies Ltd | Manufacturing | 2021 |
| Digital Projection Holdings Limited | Professional & scientific | 1996 |
| Digital Projection International Limited | Professional & scientific | 2001 |
| Digital Projection Limited | Manufacturing | 1996 |
| Digital Security & Surveillance Limited | Administrative & support | 2009 |
| Digitally Printed Splashbacks Ltd | Other services | 2021 |
| DIL Specialist Cars Ltd | Wholesale & retail | 2026 |
| Dilan 26 Limited | Wholesale & retail | 2026 |
| Dilawar Malkiat Limited | Wholesale & retail | 2020 |
| Dilpasand UK Ltd | Wholesale & retail | 2018 |
| DIN Contracting Limited | Construction | 2023 |
| Dinair Central Europe Ltd. | Wholesale & retail | 2016 |
| Dinmore LLP | | 2021 |
| Dinnerstone Limited | Hospitality | 2006 |
| Diode Energy Limited | Professional & scientific | 2015 |
| Diode Solutions Ltd | Professional & scientific | 2026 |
| Diodes Fast Analog Solutions Limited | Professional & scientific | 1996 |
| Diodes Holdings UK Limited | Professional & scientific | 2008 |
| Diodes Semiconductors GB Limited | Manufacturing | 2018 |
| Diodes Zetex Limited | Professional & scientific | 1978 |
| Diodes Zetex Semiconductors Limited | Manufacturing | 1989 |
| Diosdore Management (UK) Ltd | Construction | 2025 |
| Direct Home Interiors Limited | Wholesale & retail | 2020 |
| Direct Inspections Limited | Financial services | 2016 |
| Direct Roofcare Ltd | Construction | 2025 |
| Direct Tyre Solutions Ltd | Wholesale & retail | 2023 |
| Directcleaning Ltd | Other services | 2025 |
| Directro Ltd | Real estate | 2024 |
| DIS Building Treatments Ltd | Construction | 2026 |
| Disabled Transport Solutions Ltd | Transport & logistics | 2009 |
| Disc Construction and Maintenance Ltd | Construction | 2020 |
| Disc Security Controls Ltd | Wholesale & retail | 2019 |
| Discount Furniture Centre (Oldham) Limited | Wholesale & retail | 2018 |
| Discount Furniture Centre Ltd | Wholesale & retail | 2025 |
| Discount Stock Outlet Limited | Wholesale & retail | 2006 |
| Discover Mobility Limited | Wholesale & retail | 2024 |
| Discreet Business Ltd | Professional & scientific | 2025 |
| Discreet Holdings Ltd | Financial services | 2025 |
| Dismal Training Ltd | Information & communication | 2023 |
| Dispensed Ltd | Health & social care | 2023 |
| Ditchfield Consultancy Services Ltd | Professional & scientific | 2026 |
| Dive Deeper Development Ltd | Professional & scientific | 2019 |
| Diversitech Ltd. | Administrative & support | 1997 |
| Divinax Care Limited | Health & social care | 2024 |
| Divine Crown Ltd | Information & communication | 2015 |
| Divine Textiles Ltd | Wholesale & retail | 2016 |
| DIY Nation C.I.C. | Information & communication | 2019 |
| DJ Civil Engineering Limited | Construction | 2014 |
| DJ Makkar Ltd | Financial services | 2025 |