| Davgri Property Ltd | Real estate | 2025 |
| David Brookfield Ltd | Education | 2018 |
| David Edward Hatchard Ltd | Construction | 2014 |
| David Porter Ltd | Wholesale & retail | 2013 |
| David PYE Courier Services Limited | Transport & logistics | 2016 |
| David Tunnah Ltd | Health & social care | 2024 |
| Davies North West Limited | Construction | 2016 |
| Davies&Sons Ltd | Construction | 2023 |
| Davinci Designer Concrete Ltd | Manufacturing | 2016 |
| Davsa Ltd | Health & social care | 2022 |
| DB & MB Property Ltd | Real estate | 2023 |
| DB Practices Limited | Health & social care | 2020 |
| Dbrace Ltd | Hospitality | 2021 |
| DC Trading Website and Sales Management Ltd | Wholesale & retail | 2020 |
| DDA Ramps and Adaptations Limited | Construction | 2004 |
| DE LA Marta Limited | Wholesale & retail | 1991 |
| Deans Design Services Limited | Information & communication | 2013 |
| DEE Clearances Ltd | Water & waste | 2018 |
| DEE Rentals LLP | | 2008 |
| DEE Stone Ltd | Administrative & support | 2025 |
| Deeside Flight Simulators Limited | Professional & scientific | 2016 |
| Deeside Flight Training Limited | Transport & logistics | 2019 |
| Deeside MAC Ltd | Arts & recreation | 2021 |
| Deeside Park Conservation Trust | Agriculture & fishing | 1996 |
| Delahaye Services Ltd | Construction | 2025 |
| Delicious Bathrooms Ltd | Construction | 2026 |
| Dene Dental Limited | Health & social care | 2026 |
| Dental Care Network Ltd | Health & social care | 2023 |
| Dental Grind Ltd | Health & social care | 2023 |
| Dental Guardian Ltd | Health & social care | 2023 |
| Dentsmile Limited | Health & social care | 2023 |
| Design Opportunities Ltd | Health & social care | 2024 |
| Designer Concrete Supplies Ltd | Wholesale & retail | 2019 |
| Destination Learning Limited | Professional & scientific | 2010 |
| Detailing Industry Supplies Ltd | Manufacturing | 2018 |
| Deusnet Limited | Mining & quarrying | 2025 |
| Deva Educational Psychology Limited | Education | 2025 |
| Deva Services Limited | Transport & logistics | 2005 |
| Deveto Ltd | Construction | 2019 |
| Dexter Records Limited | Information & communication | 2025 |
| DG Nova Holdings Ltd | Wholesale & retail | 2025 |
| Dhillon Dental Group Limited | Health & social care | 2022 |
| DHP Recruitment Limited | Other services | 2006 |
| DHT Properties Management Ltd | Health & social care | 2026 |
| DHY Consulting Limited | Professional & scientific | 2022 |
| Diamond Clear Limited | Health & social care | 2019 |
| Diddi Drama Ltd | Education | 2018 |
| Digconn Systems Limited | Information & communication | 1997 |
| Digital Computer Service Limited | Construction | 2021 |
| Digital Factors Ltd | Professional & scientific | 2023 |
| Digital Motion MCR Ltd | Other services | 2023 |
| Dilot Estates Ltd | Construction | 2026 |
| Direct Car Keys & Diagnostics Ltd | Wholesale & retail | 2021 |
| Direct Consultancy Recruitment Limited | Administrative & support | 2023 |
| Direct Supreme Products Limited | Wholesale & retail | 2025 |
| Discount Plaza Ltd | Wholesale & retail | 2021 |
| Disruptive Management Ltd | Professional & scientific | 2020 |
| Divalo International Ltd | Mining & quarrying | 2023 |
| DJB SPV 1 Ltd | Arts & recreation | 2023 |
| DJH Chester Limited | Professional & scientific | 2011 |
| DJH Wirral & Chester Limited | Professional & scientific | 1996 |
| Djlw Estates Limited | Real estate | 2017 |
| DJR Medical Services Ltd | Health & social care | 2023 |
| Djsindustrial Ltd | Construction | 2024 |
| DLR Property Management Ltd | Real estate | 2017 |
| DM Dehgani Holdings Ltd | Financial services | 2025 |
| DM Dehgani LAB Limited | Health & social care | 2026 |
| DM Dehgani Ltd | Health & social care | 2024 |
| DM Road Marking Ltd | Construction | 2026 |
| Dmdharmaraj Ltd | Health & social care | 2025 |
| DMK Investments UK Limited | Real estate | 2008 |
| Dmstays Ltd | Real estate | 2026 |
| DNS Resources Limited | Wholesale & retail | 2018 |
| Dock Street MOT Centre Ltd | Wholesale & retail | 2025 |
| Dodsons Roofing Ltd | Construction | 2024 |
| Doggy Discs Limited | Wholesale & retail | 2015 |
| Dolci Bella Limited | Wholesale & retail | 2025 |
| Dolue Consults Limited | Health & social care | 2024 |
| Domus Dentis Limited | Wholesale & retail | 2005 |
| Domus PM Ltd | Real estate | 2022 |
| Done Property Solutions Limited | Real estate | 2024 |
| Door Access & Entrance Systems Limited | Construction | 2020 |
| Doosan Bobcat UK Ltd. | Wholesale & retail | 2007 |
| Dopeboyz Ltd | Wholesale & retail | 2026 |
| Dorhill Dental Ltd | Health & social care | 2022 |
| Dorin Herta Ltd | Transport & logistics | 2020 |
| Doughnutology Ltd | Hospitality | 2017 |
| Doughty’S Engineering & Co . Ltd | Manufacturing | 2025 |
| Dover Priory Dental Limited | Health & social care | 2021 |
| Dovil Ltd | Wholesale & retail | 2025 |
| DP Rentals & Developments Ltd | Real estate | 2025 |
| Dpmosx Ltd | Information & communication | 2026 |
| DR Bowles Ltd | Health & social care | 2025 |
| DR Dallali Ltd | Health & social care | 2022 |
| DR John Sorensen Limited | Health & social care | 2022 |
| DR Laura Craven Medical Aesthetics Ltd | Health & social care | 2023 |
| DR Meeta Gill Advanced Medical Aesthetics Ltd | Health & social care | 2025 |
| DR Nagar Ltd | Health & social care | 2026 |
| DR Oliver Dickson Limited | Information & communication | 2024 |
| DR Richard Gupta Medical Services Ltd | Health & social care | 2023 |