| Dapol Limited | Manufacturing | 1983 |
| Dapol Model Railways Limited | Extraterritorial | 1999 |
| Dark Flame Solutions Limited | Wholesale & retail | 2017 |
| Dark Star Fire Test Systems Limited | Professional & scientific | 2001 |
| Darkjewel Ltd | Arts & recreation | 2021 |
| Darren Atkins Limited | Professional & scientific | 2009 |
| Darryl Roberts Electrical Ltd | Construction | 2013 |
| Darwin Optical Company Limited | Administrative & support | 2007 |
| Data Pacific Limited | Information & communication | 1990 |
| DATA8 Limited | Information & communication | 2003 |
| Dave Clark I T Services Ltd | Information & communication | 2014 |
| Dave Cottle Holdings Limited | Administrative & support | 2008 |
| Dave Cottle Homes Moreton Ltd | Real estate | 2025 |
| Dave Hall Management Consultants Ltd | Professional & scientific | 2017 |
| Dave Jones Building Contractors Limited | Construction | 2021 |
| David E. James Consultancy Ltd | Professional & scientific | 2023 |
| David Groom Sound Limited | Administrative & support | 2003 |
| David Roberts & Company (Wrexham) Limited | Construction | 2011 |
| David W. Williams Limited | Wholesale & retail | 1959 |
| Davies & Thomas Ltd | Construction | 2023 |
| Davies Accountancy Limited | Professional & scientific | 2016 |
| Davies Davies Price Ltd | Real estate | 2022 |
| Davies Development & Testing Limited | Professional & scientific | 2002 |
| Davison Ltd | Information & communication | 2019 |
| Davpen Ltd | Other services | 2024 |
| Dawid Gardyjas Transport Ltd. | Transport & logistics | 2014 |
| Dawnhill Limited | Real estate | 1963 |
| Dawson's Farm Management Company Limited | Households | 2006 |
| Day & Company (Bolton) Limited | Professional & scientific | 2003 |
| Daylight Solar Power Limited | Construction | 2011 |
| DAZ C Lifts Ltd | Construction | 2020 |
| DB Property Partners Ltd | Construction | 2025 |
| DBW FM Limited | Financial services | 1984 |
| DBW Holdings Limited | Financial services | 2017 |
| DBW Investments (10) Limited | Financial services | 2012 |
| DBW Investments (11) Limited | Financial services | 2013 |
| DBW Investments (12) Limited | Financial services | 2016 |
| DBW Investments (14) Limited | Financial services | 2016 |
| DBW Investments (2) Limited | Financial services | 2003 |
| DBW Investments (3) Limited | Financial services | 2004 |
| DBW Investments (4) Limited | Financial services | 2005 |
| DBW Investments (5) Limited | Financial services | 2007 |
| DBW Investments (6) Limited | Financial services | 2008 |
| DBW Investments (8) Limited | Financial services | 2012 |
| DBW Investments (9) Limited | Financial services | 2012 |
| DBW Investments (Mims) Limited | Financial services | 2019 |
| DBW Managers Limited | Financial services | 2017 |
| DBW Services Limited | Financial services | 2017 |
| Dc&Family Ltd | Construction | 2026 |
| DCE Wrexham Ltd | Hospitality | 2025 |
| DCJ NW Limited | Construction | 2025 |
| DE Almeida Transport Ltd | Transport & logistics | 2015 |
| DE Rosa and Jones Limited | Real estate | 2025 |
| Dead Good Scran Ltd | Hospitality | 2025 |
| Deaffern Property Group Ltd | Real estate | 2024 |
| Dean Alex Limited | Professional & scientific | 2025 |
| Dearboy Petcare Limited | Wholesale & retail | 2023 |
| Deart Limited | Manufacturing | 2010 |
| Declan Williams Construction Ltd | Construction | 2026 |
| Decor-Lam Holdings Limited | Financial services | 2017 |
| Decor-Lam Limited | Manufacturing | 2003 |
| Decsolve Limited | Professional & scientific | 2010 |
| DEE Archaeological Services Ltd | Professional & scientific | 2023 |
| DEE Cables Limited | Wholesale & retail | 2013 |
| DEE Valley Developments Limited | Construction | 2017 |
| DEE Valley Limited | Financial services | 1994 |
| DEE Valley Produce Limited | Wholesale & retail | 2018 |
| DEE Valley Spray Solutions Ltd | Construction | 2017 |
| DEE View (Llangollen) Management Company Limited | Households | 2019 |
| Deep Blue Catch Limited | Agriculture & fishing | 2025 |
| Deep Purple Project Limited | Wholesale & retail | 2020 |
| Deer Management Qualifications | Education | 1997 |
| Deer Stalking Certificates Limited | Education | 2000 |
| Deescan Controls Limited | Manufacturing | 2024 |
| Deeside Farm Distillery Wrexham Ltd | Manufacturing | 2023 |
| Deeside Plumbing & Heating Services Limited | Construction | 2007 |
| Define Fitness Group Ltd | Education | 2024 |
| Dehollie Limited | Health & social care | 2022 |
| Deighton Bowie (Trustees) Limited | Professional & scientific | 2020 |
| Deighton Bowie Ltd | Professional & scientific | 2013 |
| Delamere Events Catering Limited | Hospitality | 2016 |
| Delamere Events Limited | Hospitality | 2010 |
| Delamere Outdoor Fitness Ltd | Arts & recreation | 2013 |
| Delmar World Limited | Other services | 2009 |
| Delmere Consulting Limited | Professional & scientific | 2024 |
| Delph Wrexham Ltd | Hospitality | 2025 |
| Delta Academy of Dance & Performing Arts Ltd | Arts & recreation | 2008 |
| Delta Dance Limited | Arts & recreation | 2023 |
| Delta Expressdelivery Ltd | Transport & logistics | 2021 |
| Demon Chips Limited | Wholesale & retail | 2012 |
| Demon Tweeks EOT Limited | Professional & scientific | 2025 |
| Demon Tweeks Limited | Wholesale & retail | 2003 |
| Dendro Construction Limited | Construction | 2012 |
| Dendro Holdings Limited | Real estate | 2016 |
| Denislav Dobrev Ltd | Transport & logistics | 2014 |
| Dent Car Park Limited | Real estate | 2010 |
| Dental Dynamics Limited | Professional & scientific | 2022 |
| Dentwerx Limited | Wholesale & retail | 2006 |
| Depth Solutions Limited | Other services | 2021 |
| Deputy DOT Business Services Limited | Administrative & support | 2018 |