| Danny Johnson Limited | Transport & logistics | 2026 |
| Danoboi Limited | Hospitality | 2026 |
| Danrose Consulting Limited | Extraterritorial | 2015 |
| Dans Drylining Ltd | Construction | 2013 |
| Danshi UK Education Limited | Education | 2014 |
| Danstar Limited | Wholesale & retail | 2018 |
| Dantian Ltd | Information & communication | 2022 |
| Danut&Yanys Ltd | Transport & logistics | 2018 |
| Daphne Properties Limited | Real estate | 2021 |
| Daphzachthea Elevator Company Ltd | Construction | 2024 |
| Darby Building Solutions Ltd | Construction | 2026 |
| Dareset Connections Ltd | Health & social care | 2020 |
| Dareus Deals Limited | Wholesale & retail | 2017 |
| Dari Landscape and Build Ltd | Construction | 2025 |
| Daridan Construction Ltd | Construction | 2025 |
| Darion Fire Protection Ltd | Construction | 2026 |
| Darius Zilaitis Ltd | Construction | 2011 |
| Darius' House Limited | Administrative & support | 2023 |
| Dariuss Ltd | Construction | 2020 |
| Darjeeling Tandoori Ltd | Hospitality | 2022 |
| Darkside Ltd | Construction | 2024 |
| Darlington Delaire Creative Ltd | Arts & recreation | 2025 |
| Darsh Solutions Ltd | Real estate | 2023 |
| Darwana Limited | Wholesale & retail | 2025 |
| DAS Konnen Ltd | Information & communication | 2025 |
| Dasco Developments Limited | Construction | 2024 |
| Dasco Holdings Limited | Real estate | 2024 |
| Dasco Services Limited | Construction | 2024 |
| Dastgyr UK Limited | Wholesale & retail | 2023 |
| Dastoor Collection Ltd | Wholesale & retail | 2024 |
| Data & Insight Ltd | Information & communication | 2019 |
| Data and Beyond Limited | Information & communication | 2022 |
| Data and Design Ltd | Information & communication | 2012 |
| Data Folio Accountants Ltd | Professional & scientific | 2016 |
| Data Ikrant Ltd | Information & communication | 2022 |
| Data Market Online Ltd | Wholesale & retail | 2025 |
| Data Traders Limited | Wholesale & retail | 2011 |
| Datad Ltd | Information & communication | 2025 |
| Dataelectric Ltd | Construction | 2025 |
| Datom Healthcare Limited | Health & social care | 2021 |
| Davdan Store Ltd | Wholesale & retail | 2022 |
| David Adam Estates Ltd | Real estate | 2021 |
| David Barry and Company Limited | Professional & scientific | 1998 |
| David Miles & Partners Limited | Professional & scientific | 1995 |
| David Perpetuini Limited | Administrative & support | 2012 |
| David Singh Health Care Limited | Health & social care | 2023 |
| David Terry & Co Limited | Professional & scientific | 2021 |
| David Wyatt Holdings Ltd | Construction | 2018 |
| Davidan Ltd | Manufacturing | 2024 |
| Davido Build Ltd | Construction | 2023 |
| Davidpropertyelectrical Ltd | Real estate | 2021 |
| Davis Architectural Services Ltd. | Manufacturing | 2002 |
| Davjo Services UK Ltd | Health & social care | 2023 |
| Daway Ltd | Extraterritorial | 2025 |
| Dawn Line Capital Ltd | Financial services | 2025 |
| Dawnz Property Ltd | Real estate | 2009 |
| Dawood Engineering Ltd | Construction | 2019 |
| Day One Services Ltd | Professional & scientific | 2025 |
| Dayaal Construction Ltd | Construction | 2020 |
| Dayyan Estates Ltd | Real estate | 2022 |
| DAZ Properties Investment Ltd | Real estate | 2024 |
| Daza Estates Ltd | Hospitality | 2025 |
| Daze Enterprises Ltd | Arts & recreation | 2015 |
| DB & TP Solutions Ltd | Transport & logistics | 2025 |
| DB City Solutions Ltd | Construction | 2026 |
| DB Construct Ltd | Construction | 2020 |
| DB Garden Design Ltd | Administrative & support | 2020 |
| DB Locums Limited | Health & social care | 2023 |
| DB Management Services Ltd | Transport & logistics | 2020 |
| DB Professionals Construction Ltd | Construction | 2020 |
| DB Property Services Ltd | Construction | 2015 |
| DB UK Property Investments Limited | Real estate | 2022 |
| DB UK Property Management Limited | Real estate | 2020 |
| DBG Real Estate Ltd | Real estate | 2025 |
| Dbsr Holdings Ltd | Real estate | 2024 |
| Dbxrax Ltd | Transport & logistics | 2025 |
| DC Plumbing & GAS Ltd | Construction | 2024 |
| Dc&A Transport Limited | Transport & logistics | 2020 |
| Dc&H Young Associates Limited | Professional & scientific | 2025 |
| DC888SERVICES Ltd | Transport & logistics | 2021 |
| DCA Tiling Limited | Construction | 2023 |
| DCD Construction Limited | Construction | 2005 |
| DCM Financial Crime Ltd | Financial services | 2022 |
| DCP Healthline Ltd | Health & social care | 2020 |
| Dcpv Consultants Ltd | Administrative & support | 2025 |
| DCQ Group Ltd | Construction | 2019 |
| DD Clinic Limited | Real estate | 2013 |
| DD Grays Ltd | Wholesale & retail | 2024 |
| DD Kent Elms Ltd | Wholesale & retail | 2025 |
| Ddamess Ltd | Health & social care | 2022 |
| Ddaniels Limited | Information & communication | 2022 |
| DDC Concept Ltd | Information & communication | 2016 |
| DDG Groundworks & Construction Limited | Construction | 2015 |
| DDG Lifting Services Ltd | Construction | 2023 |
| DDM Wood Limited | Construction | 2023 |
| Ddmmo Ltd | Transport & logistics | 2018 |
| DDN Resources (UK) Limited | Other services | 2018 |
| DDR Construction Services Limited | Construction | 2020 |
| DDS Interiors Ltd | Construction | 2025 |
| Dduk Properties Ltd | Real estate | 2021 |