| D.B. Cabinetry Limited | Manufacturing | 2015 |
| D.B. Gibbons (Construction) Limited | Construction | 1999 |
| D.B. Property Ltd | Real estate | 2000 |
| D.C Smart Construction Services Ltd | Construction | 2019 |
| D.G Construction South West Ltd | Construction | 2024 |
| D.G.S. Landscapes Limited | Construction | 2006 |
| D.G.S. Properties (SW) Ltd | Real estate | 2025 |
| D.H. Services (SW) Ltd | Construction | 2006 |
| D.H.A. Pollution Control Ltd. | Water & waste | 1997 |
| D.J. Howe (Weston) Ltd | Wholesale & retail | 1962 |
| D.J. Mayhead Electrical Services Limited | Construction | 2010 |
| D.J. Scaffolding Limited | Construction | 2002 |
| D.J.Ellis Ltd | Professional & scientific | 2023 |
| D.M.J Communications Ltd | Manufacturing | 2013 |
| D.N.Eng Ltd | Manufacturing | 2025 |
| D.R.W. Investments Limited | Administrative & support | 1976 |
| D.S.Davis Intergrated Global Limited | Administrative & support | 2019 |
| D.T. Cars (Bristol) Ltd | Wholesale & retail | 2018 |
| D.T. Cook Roofing & Cladding Limited | Construction | 2015 |
| D.T.E. Contractors Ltd | Construction | 2013 |
| D2 Planning Limited | Professional & scientific | 2004 |
| D20 Property Ltd | Real estate | 2025 |
| D21 Ltd | Construction | 2024 |
| D2U (Nationwide) Limited | Transport & logistics | 2017 |
| D2U Bristol Ltd | Wholesale & retail | 2021 |
| D3IP Ltd | Professional & scientific | 2026 |
| D4 E-Commerce Ltd | Wholesale & retail | 2025 |
| D4 Management Ltd | Professional & scientific | 2017 |
| D4E Mulberry (Holdings) Limited | Real estate | 2002 |
| D4E Mulberry Limited | Real estate | 2002 |
| D7 Group Limited | Wholesale & retail | 2018 |
| D7 Property Management Ltd | Real estate | 2017 |
| DA Building & Maintenance Limited | Construction | 2015 |
| DA Fuchaman Ltd | Arts & recreation | 2022 |
| DA Grid Solutions Ltd | Wholesale & retail | 2026 |
| DA Rentals Limited | Real estate | 2026 |
| DA World IS Ours Ltd | Wholesale & retail | 2025 |
| DAA Mixt Ltd | Transport & logistics | 2025 |
| Daanish Properties Limited | Real estate | 2020 |
| Daas Food Ltd | Hospitality | 2019 |
| Daas Properties Ltd | Real estate | 2018 |
| DAB Technical Consultants Ltd | Professional & scientific | 2025 |
| DAB Ventures Ltd | Financial services | 2025 |
| Daber Trans Ltd | Transport & logistics | 2013 |
| Dabih Solar Ltd | Energy | 2020 |
| Daca Property Limited | Real estate | 2026 |
| Dacamit Solutions Ltd | Wholesale & retail | 2021 |
| Dach Ventures Limited | Financial services | 2025 |
| Dachiz Limited | Health & social care | 2023 |
| Dachsbau Limited | Other services | 2015 |
| Daci Autos (Bristol) Ltd | Wholesale & retail | 2020 |
| Dacia Bristol Ltd | Wholesale & retail | 2024 |
| Dacka Consultancy Limited | Financial services | 2002 |
| Dackon LP | | 2015 |
| Dacorar (Southern) Management Company Limited | Real estate | 2015 |
| Dacosta Enterprise Ltd | Wholesale & retail | 2020 |
| Dacrisco Builders Limited | Construction | 2018 |
| Dada Breakdown Recovery Ltd | Transport & logistics | 2024 |
| Dadaras Production Ltd | Information & communication | 2012 |
| Daddlebrook Ltd | Professional & scientific | 2016 |
| Dadlaw 274 Limited | | 1984 |
| Dads CAB II Limited | Transport & logistics | 2025 |
| Daedalus Global Limited | Information & communication | 2010 |
| Dafa Properties (UK) Limited | Real estate | 2013 |
| Dafen Reserve Power Limited | Energy | 2014 |
| Daffodil Renovations (Bath) Ltd | Construction | 2023 |
| Daftec Limited | Professional & scientific | 1991 |
| Dafydd Rees Associates Limited | Information & communication | 2017 |
| Dahab Fine Jewellery Ltd | Wholesale & retail | 2019 |
| Dahab Gold Processing Ltd | Wholesale & retail | 2020 |
| Dahlia Care Consultancy Limited | Administrative & support | 2022 |
| Daily Deals Depot Ltd | Wholesale & retail | 2025 |
| Daily Draw Group Ltd | Wholesale & retail | 2021 |
| Daily Vans Bristol Ltd | Wholesale & retail | 2026 |
| Dain MYA HR Solutions Limited | Professional & scientific | 2026 |
| Dairycroft Management Limited | Households | 1988 |
| Dais Engagement and Consultancy CIC | Professional & scientific | 2024 |
| Daisy Media Ltd | Information & communication | 2013 |
| Daisy's Coffee Shop Limited | Hospitality | 2013 |
| Daisychain Bristol Limited | Education | 2009 |
| Daisyfield Press Limited | Information & communication | 2011 |
| Daits AI Ltd | Information & communication | 2025 |
| Dajobe Investments Limited | Financial services | 2011 |
| Dajobe PF Ltd | Financial services | 2022 |
| DAK (SW) Limited | Wholesale & retail | 2023 |
| Daki Estates Limited | Real estate | 2023 |
| Daktronics UK Limited | Manufacturing | 2002 |
| DAL Systems Limited | Professional & scientific | 2020 |
| Dalai Limited | Construction | 2019 |
| Dalair Engineering Ltd | Professional & scientific | 2018 |
| Dale Hanson Electrical Ltd | Construction | 2016 |
| Dale House (Monkton Combe) Limited | Households | 1974 |
| Dale Read Limited | Construction | 2001 |
| Daleside Management Limited | Households | 1985 |
| Daley (Bristol) Limited | Hospitality | 2021 |
| Daley Electrical Services Limited | Construction | 2012 |
| Daley Gullu Limited | Hospitality | 2024 |
| Daley Property Ltd | Real estate | 2025 |
| Daley Services Ltd | Administrative & support | 2021 |
| Dalgold Flat Management Company Limited | Households | 1982 |