| Doctrina Ltd | Information & communication | 2019 |
| Document Rentals Limited | Real estate | 2025 |
| Docusign UK Limited | Administrative & support | 2016 |
| Dodd Squad Developments Ltd | Real estate | 2025 |
| Dodo Apps Ltd | Information & communication | 2011 |
| Dodwellsons Limited | Information & communication | 2019 |
| Dog House Post Production Limited | Information & communication | 2005 |
| Dog Industries Ltd | Wholesale & retail | 2022 |
| Dog's Lounge Ltd | Wholesale & retail | 2017 |
| Dogesec Limited | Information & communication | 2024 |
| Dogs Across the Pond Ltd | Wholesale & retail | 2023 |
| Doha Club Limited | Hospitality | 2026 |
| Doing Bits Bristol Ltd | Wholesale & retail | 2018 |
| Doing Something Nice Ltd | Wholesale & retail | 2022 |
| Doiteg Foods & Drinks Limited | Manufacturing | 2025 |
| Dojo Digital Limited | Information & communication | 2019 |
| Dok-Tek Systems Ltd | Manufacturing | 1995 |
| Dokal Finedon Limited | Administrative & support | 2025 |
| Dolan Equipment Ltd | Wholesale & retail | 2025 |
| Dolce & Banana Ltd. | Manufacturing | 2023 |
| Dolford Property Management Limited | Professional & scientific | 1985 |
| Dollka Limited | Wholesale & retail | 2020 |
| Dolls Cottage Limited | Hospitality | 2025 |
| Dolly Shop Ltd | Wholesale & retail | 2021 |
| Dolman Properties Ltd | Real estate | 2013 |
| Dolman's Training Ltd | Education | 2026 |
| Dolph Designs Limited | Information & communication | 2004 |
| Dolph-Tech Construction Ltd | Construction | 2012 |
| Dolphin Deliveries Ltd | Professional & scientific | 2025 |
| Dolphin Food Land (Bristol) Ltd | Hospitality | 2023 |
| Dolphingate (UK) Limited | Hospitality | 2019 |
| Dolz Art, Hair and Beauty Ltd. | Wholesale & retail | 2024 |
| DOM Building Solutions Limited | Construction | 2019 |
| DOM DOM Delivery Ltd | Transport & logistics | 2025 |
| DOM Pearcy Stunts Limited | Administrative & support | 2024 |
| DOM Pickett Expeditions Limited | Administrative & support | 2015 |
| Dom's Coffee House Limited | Hospitality | 2015 |
| Dom's Super Whip Ltd | Hospitality | 2014 |
| Domain of Science Ltd | Information & communication | 2022 |
| Dome Inc Ltd | Information & communication | 2025 |
| Domestic Drains Services Ltd | Administrative & support | 2002 |
| Domestic Electrical Fit Outs Ltd | Extraterritorial | 2026 |
| Domestic Surveys Ltd | Professional & scientific | 2021 |
| Domestic/Commercial Electrical Services & Facilities Management Ltd | Construction | 2024 |
| Domin Limited | Professional & scientific | 2012 |
| Dominic Pizza Bristol Limited | Hospitality | 2024 |
| Dominic Property Solutions Ltd | Real estate | 2013 |
| Dominic Taylor Architecture & Design Ltd | Professional & scientific | 2008 |
| Dominik Euroconstruction Ltd | Construction | 2025 |
| Dominion Trading Company | | 2001 |
| Domino Engineering Bristol Limited | Other services | 2007 |
| Dominus CR Limited | Real estate | 2021 |
| Domira Recruitment Limited | Information & communication | 2018 |
| Domitian Limited | Extraterritorial | 2012 |
| Domo Group Ltd | Information & communication | 2007 |
| Domus Aeternum Ltd. | Professional & scientific | 2015 |
| Domus Holmes Limited | Real estate | 2015 |
| Domyan Cars Ltd | Transport & logistics | 2025 |
| DON Clark Camera Repairs Limited | Manufacturing | 2002 |
| DON Gay’S Florist Ltd | Wholesale & retail | 2023 |
| DON Giovannis Bristol Limited | Hospitality | 2003 |
| DON John Management Company Limited | Households | 2005 |
| Donacourt Limited | Real estate | 1989 |
| Donaldson & Newman Limited | Real estate | 1975 |
| Doncam Ltd | Administrative & support | 2025 |
| Done Advisory Group Limited | Construction | 2026 |
| Doner and Burger Ltd | Hospitality | 2026 |
| Doner Special Ltd | Hospitality | 2025 |
| Dongbei Ltd | Hospitality | 2025 |
| Dongnae Bristol Ltd | Hospitality | 2024 |
| Donicka Anand Autos Limited | Wholesale & retail | 2025 |
| Donkijote Courier Ltd | Transport & logistics | 2025 |
| Donnelly Optometry Ltd | Professional & scientific | 2024 |
| Donnington Grove Veterinary Group Limited | Professional & scientific | 2013 |
| Donoma Power Limited | Energy | 2010 |
| Donsen Ltd | Hospitality | 2017 |
| Donya Trading Company Limited | Real estate | 1998 |
| Dooggu Private Limited | Wholesale & retail | 2024 |
| Doogle Enterprises Limited | Professional & scientific | 2014 |
| Doolally Stroud Ltd | Hospitality | 2024 |
| Doom Gloom Ltd | Professional & scientific | 2019 |
| Door Gurus Ltd | Construction | 2025 |
| Door Services Holdings Ltd | Extraterritorial | 2019 |
| Door to Door BIN Cleaning Ltd | Administrative & support | 2026 |
| Doorbell.Io Limited | Information & communication | 2018 |
| Doors Open Property Group Ltd | Real estate | 2024 |
| Doorstep Photography Ltd | Wholesale & retail | 2012 |
| Doptio CIC | Professional & scientific | 2025 |
| DOR Bakehouse Ltd | Wholesale & retail | 2026 |
| Dor&Dor Trans Ltd | Transport & logistics | 2019 |
| Dorada Property Management Limited | Households | 1987 |
| Dorbin Advisory Limited | Professional & scientific | 2025 |
| Dorma Industries Limited | Manufacturing | 1989 |
| Dormers Country House Limited | Hospitality | 1951 |
| Dorota Haden Ltd | Professional & scientific | 2013 |
| Dorothea Developments Limited | Real estate | 2017 |
| Dorothea Metal Spraying Ltd | Manufacturing | 2012 |
| Dorothea Restorations Limited | Professional & scientific | 2020 |
| Dorothys L1 Venue Limited | Financial services | 2021 |
| Dorrington Mundy Limited | Professional & scientific | 2013 |