| Doddul Ltd | Information & communication | 2019 |
| Dodgson Industries Ltd | Wholesale & retail | 2024 |
| Dodo Happy Ltd | Wholesale & retail | 2024 |
| Dodol Food Ltd | Hospitality | 2023 |
| Dodsworth Electrical Limited | Administrative & support | 2000 |
| Dodsworth GAS Services Limited | Construction | 2017 |
| DOE Luxury Homes Limited | Real estate | 2025 |
| Dog Pack Limited | Wholesale & retail | 2020 |
| Doggie Holiday Homes Cherque Farm Ltd | Agriculture & fishing | 2019 |
| Doggie Holiday Homes Jane Ltd | Agriculture & fishing | 2019 |
| Doggie Holiday Homes JO Ltd | Agriculture & fishing | 2023 |
| Doggie Holiday Homes Limited | Administrative & support | 2016 |
| Doggy Academy Ltd | Other services | 2022 |
| Doghealth Limited | Wholesale & retail | 2021 |
| Dogs Go Walking Ltd | Other services | 2013 |
| Doherty Engineers Ltd | Construction | 2019 |
| Doherty International Construction Limited | Construction | 2024 |
| Doherty Plant Hire Ltd | Construction | 2009 |
| Doherty Properties Ltd | Real estate | 2017 |
| Doherty's Group Ltd | Extraterritorial | 2020 |
| Doki Kagoshima Limited | Hospitality | 2020 |
| Dolafon Properties Ltd | Real estate | 2025 |
| Dolapo Health Care Services Limited | Health & social care | 2024 |
| Dolfan Limited | Administrative & support | 1996 |
| Dolittle Investment Company | Financial services | 2021 |
| Doll Accessories Limited | Wholesale & retail | 2025 |
| Dollar East Associates Ltd | Information & communication | 2013 |
| Dollarsuk Limited | Information & communication | 2013 |
| Dolled by Saba Ltd | Other services | 2023 |
| Dolly Lane Limited | Administrative & support | 2022 |
| Dolly Lane MOT Centre Limited | Other services | 2014 |
| Dolly Motors Ltd | Wholesale & retail | 2026 |
| Dolly Shot Ltd | Arts & recreation | 2022 |
| Dolman Investments Ltd | Other services | 2025 |
| Dolmen Limited | Real estate | 2021 |
| Dolphin Care Homes Group Limited | Extraterritorial | 2008 |
| Doma Property Investments Ltd | Real estate | 2019 |
| Domac Designs Limited | | 1980 |
| Domcom Installs Ltd | Construction | 2023 |
| Domechie Beauty Limited | Other services | 2017 |
| Domestic and Industrial Services Limited | | 1987 |
| Domestic Appliance Helpline Limited | Other services | 2003 |
| Domestic Convenience Limited | Wholesale & retail | 2020 |
| Domestic Goddess Leeds Ltd | Administrative & support | 2019 |
| Domi Capital Ltd | Real estate | 2026 |
| Domi Domingo Ltd | Education | 2014 |
| Dominic Marsden Ltd | Administrative & support | 2026 |
| Dominic Shine and Cleaning Ltd | Administrative & support | 2023 |
| Dominic&Melisa Ltd | Transport & logistics | 2025 |
| Dominick Holding Ltd | Real estate | 2019 |
| Dominick House Ltd | Real estate | 2019 |
| Dominik Property Limited | Real estate | 2014 |
| Dominion Education Consult Ltd | Education | 2025 |
| Dominion Payroll Solutions Ltd | Professional & scientific | 2019 |
| Dominion Transporters Limited | Transport & logistics | 2024 |
| Domino Club Leeds Ltd | Hospitality | 2019 |
| Dominus Management Group Ltd | Real estate | 2025 |
| Domus Architecture Limited | Professional & scientific | 2015 |
| DON & SIL Limited | Hospitality | 2025 |
| DON Masper Ltd | Construction | 2026 |
| DON Properties Leeds Ltd | Real estate | 2020 |
| Donachie Consulting Ltd | Wholesale & retail | 2018 |
| Donald Johnston Art Advisory Ltd | Wholesale & retail | 2024 |
| Donald Scott Safety Consultant Ltd | Professional & scientific | 2015 |
| Donald's New Interface Ltd | Information & communication | 2022 |
| Donationstarter Ltd | Information & communication | 2020 |
| Doncaster BUS Station Holdings Limited | Financial services | 2003 |
| Doncaster BUS Station Limited | Real estate | 2003 |
| Doncaster Estates Partnership Limited | Construction | 2004 |
| Doncaster Fundco 1 Limited | Construction | 2004 |
| Doncaster Fundco 2 Limited | Real estate | 2007 |
| Doncaster Fundco 3 Limited | Construction | 2009 |
| Doncaster North Management Limited | Construction | 2022 |
| Doncaster Property Investments Ltd | Real estate | 2009 |
| Doncaster Rugby League Football Club (1986) Limited | Arts & recreation | 1986 |
| Doncasters Blaenavon Limited | Manufacturing | 1964 |
| Doncasters Limited | Manufacturing | 1936 |
| Doncasters UK Finance Limited | Administrative & support | 2013 |
| Doncasters UK Holdings Limited | Administrative & support | 1997 |
| Donche Ltd | Information & communication | 2026 |
| Donedeal Limited | Professional & scientific | 1998 |
| Donerz Kebab House Limited | Hospitality | 2024 |
| Donic Management PLC | Hospitality | 1986 |
| Donice Global ENT & Drywall Limited | Construction | 2024 |
| Donice Global Investment Limited | Construction | 2019 |
| Donieli Limited | Wholesale & retail | 2022 |
| Donisthorpe Enterprises Limited | Real estate | 1992 |
| Donisthorpe Flat Company (Leeds) Limited | Real estate | 1967 |
| Donisthorpe Hall | Health & social care | 1999 |
| Donkin Fabrications Ltd | Manufacturing | 2005 |
| Donland Developments Limited | Real estate | 2004 |
| Donlarrie Healthcare Ltd | Administrative & support | 2026 |
| Donnelly Rail Systems Ltd | Professional & scientific | 2016 |
| Donnington Developments Ltd | Real estate | 2020 |
| Donnis Transport Ltd | Transport & logistics | 2024 |
| Dont Bottle IT UP Ltd | Arts & recreation | 2025 |
| Dont Tell DAD Limited | Other services | 2017 |
| Donuts & Coffee Ltd | Hospitality | 2019 |
| Dony Transport Ltd | Transport & logistics | 2023 |
| Don’T BE SHY Limited | Information & communication | 2024 |