| DJ Stenstrom Ltd | Professional & scientific | 2013 |
| DJA Property Ventures Ltd | Real estate | 2026 |
| DJG Leisure Developments Ltd | Hospitality | 2019 |
| DJH Commercial Repairs Ltd | Wholesale & retail | 2025 |
| DJL Transport Limited | Transport & logistics | 2019 |
| Djpett ESQ Ltd | Health & social care | 2010 |
| DJW Plant Hire Ltd | Manufacturing | 2017 |
| DK Express 2025 Ltd | Wholesale & retail | 2025 |
| DK Noble Electrical Ltd | Construction | 2026 |
| DKM Consulting Ltd | Professional & scientific | 2025 |
| Dksol Ltd | Construction | 2019 |
| Dksubsea Limited | Wholesale & retail | 2022 |
| DKT Allseas Shipping Limited | Transport & logistics | 2014 |
| DKT Property Ltd | Real estate | 2023 |
| DL Transport Ltd | Transport & logistics | 2021 |
| DLC Tree Services Ltd | Administrative & support | 2021 |
| DLRA8CO Ltd | Wholesale & retail | 2026 |
| DLT Elec Ltd | Construction | 2023 |
| Dlt-M Construction Ltd | Construction | 2024 |
| DLV Plumbing & Heating Ltd | Construction | 2008 |
| DM Investment Properties Limited | Real estate | 2020 |
| DM Lali Ltd | Information & communication | 2022 |
| DMC Homes (London) Limited | Construction | 2015 |
| DMC Joinery & Building Limited | Construction | 2023 |
| DMC24 Limited | Wholesale & retail | 2024 |
| Dmcc Property Ltd | Real estate | 2024 |
| DMK03 Ltd | Professional & scientific | 2023 |
| DMM Business Finance Ltd | Professional & scientific | 2017 |
| DMOD23 Limited | Construction | 2023 |
| DMS UK Car Ltd | Wholesale & retail | 2025 |
| Dmsk Properties Limited | Real estate | 2021 |
| DMT Time Logistics Ltd | Transport & logistics | 2018 |
| DN Traderi Ltd | Information & communication | 2024 |
| DNA Electrical (Northwest) Limited | Construction | 2016 |
| DNA Flooring Services Limited | Wholesale & retail | 2023 |
| DNA Global Logistics Ltd | Transport & logistics | 2022 |
| DNA Tooling Ltd | Wholesale & retail | 2021 |
| DNE Commercials Ltd | Manufacturing | 2025 |
| Dnelsonroofingandbuilding Ltd | Construction | 2022 |
| DNH Cleaning Services Ltd | Administrative & support | 2025 |
| DNM Bhakta Limited | Wholesale & retail | 2024 |
| DNR MCR Limited | Hospitality | 2025 |
| DNS (Hull) Limited | Construction | 2005 |
| DNS Carpentry Limited | Construction | 2013 |
| DNWO1 Ltd | Real estate | 2019 |
| DNWO3 Ltd | Financial services | 2019 |
| DNWO4 Ltd | Financial services | 2020 |
| DO Online Ltd | Wholesale & retail | 2022 |
| DO Well Agencies Limited | Arts & recreation | 2019 |
| DO Well Fitness Ltd | Arts & recreation | 2024 |
| DO Well Food Co Ltd | Hospitality | 2021 |
| Do-Nutrition Limited | Health & social care | 2023 |
| Doctor Evercare Ltd | Health & social care | 2022 |
| Doctor's Houses Manchester Ltd | Hospitality | 2025 |
| Docustream Health Ltd | Health & social care | 2025 |
| Doda NW Ltd | Hospitality | 2022 |
| Dodmanchester Estates Limited | Real estate | 2024 |
| Dodmanchester Limited | Professional & scientific | 2023 |
| Does Data Ltd | Information & communication | 2025 |
| Dogcross Dog Field Limited | Other services | 2021 |
| Doghill Quarry Limited | Water & waste | 2013 |
| Doha Education Limited | Administrative & support | 2024 |
| Doherty Caravans Ltd | Wholesale & retail | 2025 |
| Doki Doki Donuts Ltd | Manufacturing | 2024 |
| Dolefield Ltd | Information & communication | 2022 |
| Dolphin Fish Bar Oldham Limited | Hospitality | 2018 |
| DOM Afro Ltd | Wholesale & retail | 2025 |
| DOM Maison Limited | Real estate | 2025 |
| Domestic Electrical (Oldham) Limited | Construction | 2005 |
| Domestic Energy Solutions Ltd | Professional & scientific | 2024 |
| Dominic Andrew Gartside Limited | Construction | 2021 |
| Dominic Walker Architecture Ltd | Professional & scientific | 2024 |
| Donart Film Ltd. | Information & communication | 2020 |
| Doncaster Industrial Estates Limited | Real estate | 2026 |
| Donks Cleaning Services Limited | Administrative & support | 2019 |
| Donna Taylor Services Limited | Professional & scientific | 2025 |
| Donna's Hair Design Limited | Other services | 2016 |
| Donnellan Civil Engineering Limited | Construction | 2015 |
| Don’T TIP IT!! Flip IT! Limited | Manufacturing | 2021 |
| Dornans Limited | Manufacturing | 2023 |
| DOT Courier Express Ltd | Transport & logistics | 2023 |
| DOT9 Limited | Wholesale & retail | 2013 |
| Dotproduct Limited | Information & communication | 2022 |
| Double a Motors Ltd | Wholesale & retail | 2025 |
| Double-M Business Services Limited | Administrative & support | 2012 |
| Doubleace Cleaning Limited | Administrative & support | 2026 |
| Dough Darlings Ltd | Hospitality | 2019 |
| Douglas's Carpets Limited | Wholesale & retail | 2000 |
| Dover Vanguard Roller Shutters Limited | Manufacturing | 2003 |
| Dovestone Learning Partnership | Education | 2017 |
| Dovestones International Limited | Professional & scientific | 2021 |
| Dovetales International Trust | Health & social care | 1992 |
| Dowd Holdings Limited | Wholesale & retail | 2018 |
| Downing AK Limited | Construction | 2023 |
| Dowry Park Estates Limited | Construction | 1991 |
| DP Bonchurch Developments Ltd | Real estate | 2025 |
| DP Cheyne Developments Ltd | Real estate | 2025 |
| DP Contracting Services Ltd | Wholesale & retail | 2025 |
| Dpds Properties Limited | Real estate | 2025 |
| DPF Trailer Leasing Ltd | Transport & logistics | 2008 |