| Daly Podiatry Ltd | Health & social care | 2015 |
| Damptech Solutions Ltd | Construction | 2019 |
| Damptech SW Ltd | Construction | 2026 |
| DAN Groundworks Ltd | Construction | 2018 |
| Dancell Ltd | Health & social care | 2026 |
| Dani Construction Ltd | Construction | 2014 |
| Daniel Findlay Construction Ltd | Construction | 2022 |
| Daniel Findlay Homes Ltd | Real estate | 2024 |
| Daniels Developments Limited | Construction | 2002 |
| Danny Riders Ltd | Transport & logistics | 2015 |
| Danyas Barber Shop Ltd | Other services | 2021 |
| Darth Vaper E-Liquids Limited | Wholesale & retail | 2016 |
| Dartrans Ltd | Transport & logistics | 2019 |
| DAS Restoration Limited | Construction | 2019 |
| Dasians Ltd | Hospitality | 2025 |
| Data Tamers Ltd | Professional & scientific | 2016 |
| Database Cabling Solutions Ltd | Information & communication | 2018 |
| Datadiffusion Ltd. | Manufacturing | 2014 |
| Datarage Ltd | Information & communication | 2024 |
| Datech Software Limited | Information & communication | 2011 |
| Datel Active Limited | Information & communication | 2025 |
| Datel Group Holdings Limited | Financial services | 2025 |
| Datel London Limited | Information & communication | 2025 |
| Datel North Limited | Information & communication | 2024 |
| Datel Services Limited | Information & communication | 1999 |
| Datumbridge Ltd | Administrative & support | 2026 |
| Dave Jones Ltd | Administrative & support | 2025 |
| David Burt Limited | Professional & scientific | 2018 |
| David Chamberlain Roofing Ltd | Construction | 2015 |
| David Hill Transport Ltd | Transport & logistics | 2025 |
| David Oatley Limited | Construction | 2022 |
| David Peter Cardwell Ltd | Education | 2016 |
| David Plaister Limited | Real estate | 2013 |
| David W H Wilson Consulting Ltd | Professional & scientific | 2020 |
| Davies & Moffatt Ltd | Construction | 2023 |
| Dawson Steeplejacks Limited | Other services | 1998 |
| Day to Day Property Services Limited | Construction | 2018 |
| Day-Lec Electrical Services Ltd | Construction | 2020 |
| DBA Insights Ltd | Professional & scientific | 2026 |
| DBD Group Services Ltd | Information & communication | 2022 |
| DBI Solutions Ltd | Administrative & support | 2013 |
| DBS Piping Ltd | Construction | 2017 |
| DC Rail and Civils Ltd | Construction | 2016 |
| DC Solutions (SW) Limited | Professional & scientific | 2025 |
| DCB Property Development Ltd | Real estate | 2026 |
| DCB Property Limited | Real estate | 2024 |
| DCM Trans Ltd | Transport & logistics | 2015 |
| DCR Care Limited | Real estate | 2024 |
| DCR K33 Limited | Construction | 2014 |
| DD Cleaning 87 Limited | Administrative & support | 2020 |
| DDS Rail Solutions Ltd | Manufacturing | 2011 |
| Deacon's Court (W-S-M) Management Company Limited | Administrative & support | 1989 |
| Dean Arscott Electrical Ltd | Construction | 2020 |
| Dean Lewis Pro-Am Boxing & Fitness Ltd | Arts & recreation | 2018 |
| Deborah Durbin Properties Limited | Real estate | 2017 |
| Decorama Ltd | Construction | 2013 |
| Deedground Property Management Limited | Households | 2000 |
| Deepclean Solutions Carpet, Upholstery & Mattress Specialist Ltd | Administrative & support | 2026 |
| Defend Together CIC | Administrative & support | 2025 |
| Defender Campers Ltd | Administrative & support | 2021 |
| Delicious Foods Station Ltd | Hospitality | 2025 |
| Delicious Kebab Weston Ltd | Hospitality | 2020 |
| Delta 19 Automotive Logistics Limited | Transport & logistics | 2026 |
| Delta Famiglia Ltd | Information & communication | 2016 |
| Delta V Limited | Professional & scientific | 2014 |
| Deltak Fabrications Ltd | Manufacturing | 2023 |
| Denny Farming Ltd | Professional & scientific | 2022 |
| Dentaquest Ltd | Health & social care | 2022 |
| Dentilearn Ltd | Education | 2026 |
| Dentirecruit Ltd | Administrative & support | 2025 |
| Department 12 Limited | Administrative & support | 2017 |
| Derkacz & Co Ltd | Real estate | 2018 |
| Dermody Dogs Ltd | Agriculture & fishing | 2021 |
| Deshi AM Ltd | Wholesale & retail | 2025 |
| Design Healthcare Limited | Health & social care | 2016 |
| Design Your Tours Ltd | Administrative & support | 2020 |
| Design.Make.Construct Limited | Construction | 2012 |
| Desraka Ltd | Health & social care | 2024 |
| Detailed Developments SW Limited | Manufacturing | 2021 |
| Detailed Performance Ltd | Professional & scientific | 2014 |
| Development People Consultancy (Lettings) Ltd | Real estate | 2025 |
| Development People Consultancy Limited | Real estate | 2019 |
| Developments SW Ltd | Construction | 2026 |
| Devine Recovery Solutions Ltd | Administrative & support | 2023 |
| Devonshire Court Weston-Super-Mare (Maintenance) Limited | Households | 1973 |
| Dewey Waters Limited | Manufacturing | 2023 |
| Deyncourt House Management Company Limited | Households | 1991 |
| DFE Buzzards Field Ltd | Manufacturing | 2024 |
| DG Fabrications Limited | Manufacturing | 2022 |
| DG New Media Ltd | Information & communication | 2000 |
| DGA Frames Limited | Wholesale & retail | 2018 |
| DGS Automotive Repair Ltd | Wholesale & retail | 2026 |
| DGS Fabrications Ltd | Professional & scientific | 2014 |
| DGT Property Group Ltd | Real estate | 2025 |
| DHA Fire Stopping Limited | Construction | 2010 |
| DHC Logistic Ltd | Transport & logistics | 2022 |
| DHD Structures Ltd | Professional & scientific | 2015 |
| Dhph Limited | Construction | 2020 |
| Dhyutika Global Limited | Wholesale & retail | 2025 |
| Diamond Smile by Anca Ltd | Health & social care | 2026 |