| Daniel Accountancy Limited | Professional & scientific | 2005 |
| Daniel Carroll Ventures Limited | Professional & scientific | 2026 |
| Daniel Tax Advisors Ltd | Professional & scientific | 2012 |
| Danny BS Ltd | Construction | 2025 |
| Danson Homes Limited | Construction | 1992 |
| Dantruck Ltd | Transport & logistics | 2020 |
| Dare to BE Great International Co Ltd | Education | 2020 |
| Darius Zenith Ltd | Administrative & support | 2025 |
| Dark Horse Investigation UK Ltd | Information & communication | 2026 |
| Darshy Enterprise Limited | Information & communication | 2014 |
| Dartmouth Caravan Park Limited | Hospitality | 2021 |
| Darvey Building Services Ltd | Construction | 2018 |
| DAS Detail Ltd | Administrative & support | 2025 |
| Dasailu Instrument Co., Ltd | Administrative & support | 2021 |
| Dastaar Clothing Limited | Wholesale & retail | 2021 |
| Datalynes Electrical Ltd | Construction | 2026 |
| Dattaguru Infotech (UK) Limited | Information & communication | 2011 |
| David Loosemore Limited | Construction | 2009 |
| David Luxton Associates Limited | Arts & recreation | 2003 |
| David Owen Limited | Information & communication | 2006 |
| David Wells Financial Planning Limited | Professional & scientific | 2024 |
| DAVIEGARDENS2021 Ltd | Agriculture & fishing | 2021 |
| Davimate Ltd | Transport & logistics | 2025 |
| Dawn & Co Ltd | Professional & scientific | 2013 |
| Daytona Customs Ltd | Wholesale & retail | 2023 |
| DB Raised Access Flooring Limited | Construction | 2021 |
| DC Digital Services Ltd | Administrative & support | 2022 |
| DC Roofing & Building Contractors Ltd | Construction | 2016 |
| DCA Contractors Ltd | Construction | 2022 |
| Dcac Consultancy Ltd | Professional & scientific | 2023 |
| DD Digital Limited | Professional & scientific | 2016 |
| DDA Pharma Limited | Health & social care | 2021 |
| DDF Managements Limited | Real estate | 2023 |
| DDK Real Estates Ltd | Real estate | 2024 |
| DDM Supplies Limited | Wholesale & retail | 2024 |
| Dealdio Ltd | Information & communication | 2018 |
| Dealzer Ltd | Wholesale & retail | 2022 |
| Deborah Jane Stewart Limited | Extraterritorial | 2022 |
| Decent D Team Co., Ltd | Wholesale & retail | 2021 |
| Deehan Excavations Limited | Construction | 2021 |
| Deepcrest Visa Overseas Ltd | Wholesale & retail | 2025 |
| Deepikan Mini Market Ltd | Wholesale & retail | 2010 |
| Deeptruth Limited | Information & communication | 2018 |
| Deer Park Engineering Ltd | Construction | 2007 |
| Dehvan UK Limited | Wholesale & retail | 2003 |
| Dela MAE Group Limited | Information & communication | 2018 |
| Delaney Enterprises Limited | Hospitality | 2012 |
| Delaney Residential Limited | Real estate | 2025 |
| Delephna Car Limited | Administrative & support | 2022 |
| Delephna Security Ltd | Administrative & support | 2012 |
| Delfield Group Holdings Ltd | Financial services | 2021 |
| Delfield Holdings Ltd | Financial services | 2021 |
| Delfield PE Holdings Limited | Financial services | 2020 |
| Delfield Precision Engineering Co. Limited | Manufacturing | 1964 |
| Delfield Precision Services Limited | Manufacturing | 2013 |
| Delfield Property Management Ltd | Real estate | 2022 |
| Delfield PS Holdings Limited | Financial services | 2020 |
| Delgado & Lombardi Co Ltd | Professional & scientific | 2025 |
| Dell & Sons Landscaping Limited | Construction | 2016 |
| Dellium Security Ltd | Administrative & support | 2025 |
| Dellmar Limited | Construction | 2013 |
| Delmon Green UK Limited | Professional & scientific | 2006 |
| Delta Resourcing Limited | Wholesale & retail | 2018 |
| Delta X1 Ltd | Professional & scientific | 2014 |
| Deltaspecial Limited | Professional & scientific | 1988 |
| Deluxe Support Services Limited | Administrative & support | 2022 |
| Delvify UK Limited | Information & communication | 2022 |
| Demarco Prestige Developments Limited | Real estate | 2026 |
| Demarco Properties Limited | Real estate | 2022 |
| Demarco Services Limited | Construction | 2014 |
| Demipower (1991) Limited | Hospitality | 1991 |
| Demipower (2017) Ltd | Hospitality | 2017 |
| Demipower (Eastern) Limited | Hospitality | 2017 |
| Demipower Limited | Hospitality | 1989 |
| Dendoc Limited | Health & social care | 2013 |
| Denez Limited | Construction | 2020 |
| Dennis Davina Ltd. | Health & social care | 2015 |
| Dennis TAM Group Limited | Administrative & support | 2017 |
| Dennisrom Solution Ltd | Construction | 2025 |
| Depthen Industrial Co., Ltd | Administrative & support | 2020 |
| Derby 25 Limited | Real estate | 2025 |
| Design ETC. Limited | Professional & scientific | 2010 |
| Design With a Difference Limited | Arts & recreation | 2021 |
| Desyds Properties Limited | Real estate | 2021 |
| Deta Properties Ltd | Real estate | 2020 |
| DEV Yogi Ltd | Professional & scientific | 2022 |
| Devane Consultancy (UK) Limited | Professional & scientific | 2018 |
| Develocus Ltd | Construction | 2024 |
| Devi Enterprises (London) Ltd | Wholesale & retail | 2020 |
| Devlins Scaffolding Ltd | Construction | 2020 |
| Dewdrops Investments Limited | Real estate | 2015 |
| Dgers Limited | Information & communication | 2025 |
| DGT Admin Resources Ltd | Administrative & support | 2014 |
| Dhabu Ltd | Real estate | 2019 |
| Dhatri Limited | Real estate | 2022 |
| Dhir Investments Limited | Real estate | 2020 |
| Dhruv Management Limited | Real estate | 2018 |
| Dhruvi Patel Beauty Care Limited | Other services | 2024 |
| Diagem Limited | | 1971 |
| Diamond Back Consulting Ltd | Professional & scientific | 2018 |