| DSJ Enterprises Limited | Professional & scientific | 2020 |
| DSJ Holdings Limited | Financial services | 2021 |
| DSK Holdings Ltd | Wholesale & retail | 2019 |
| Dslivesound Ltd | Professional & scientific | 2021 |
| DSM & Co Limited | Information & communication | 2010 |
| DSM Data Ltd | Information & communication | 2010 |
| Dsmd Ltd | Real estate | 2025 |
| Dsmhem Ltd | Construction | 2026 |
| Dsny Accountancy Ltd. | Professional & scientific | 2016 |
| Dspharmer Ltd | Wholesale & retail | 2024 |
| DSR Autos Limited | Wholesale & retail | 2019 |
| DSR Transport Limited | Transport & logistics | 2018 |
| DSS S Ltd | Hospitality | 2018 |
| DST 9 Limited | Health & social care | 2025 |
| Dstt UK Ltd | Real estate | 2020 |
| DSW CF Midlands Holdings Limited | Financial services | 2024 |
| DT & Associates Consultancy Services Ltd | Health & social care | 2026 |
| DT Investment Property Limited | Real estate | 2019 |
| DT Labs Global Ltd | Wholesale & retail | 2025 |
| DT on Time Logistics Limited | Transport & logistics | 2025 |
| DT Retail Ltd | Wholesale & retail | 2024 |
| DT Systems Electrical Ltd | Construction | 2009 |
| Dt&A Ltd | Education | 2023 |
| DTA Estates Ltd | Real estate | 2024 |
| DTAPPS29 Limited | Health & social care | 2023 |
| DTC Forestry Ltd | Agriculture & fishing | 2021 |
| DTD Courier & Cargo Ltd. | Transport & logistics | 2013 |
| DTD Developments Ltd | Construction | 2020 |
| DTG Group Ltd | Wholesale & retail | 2025 |
| Dtgen South Limited | Manufacturing | 2010 |
| DTH Plant Hire Ltd | Administrative & support | 2016 |
| DTH Plant Limited | Administrative & support | 2026 |
| DTK CIC | Education | 2024 |
| DTS SUB Ltd | Hospitality | 2023 |
| DTW Brickwork Limited | Construction | 2014 |
| DUA G Limited | Professional & scientific | 2025 |
| DUA General Store Ltd | Wholesale & retail | 2019 |
| DUA Mart Limited | Other services | 2026 |
| Dual Layer Analytics Limited | Information & communication | 2026 |
| Dualdec Limited | Construction | 2013 |
| DUB Productions Limited | Arts & recreation | 2006 |
| Dubai Shawarma Plus Ltd | Hospitality | 2025 |
| Dubbsbuilds Ltd | Construction | 2022 |
| Dubdocshop Ltd | Wholesale & retail | 2023 |
| Dublinn Limited | Wholesale & retail | 2024 |
| Dubski Limited | Transport & logistics | 2025 |
| Ducados Ltd | Transport & logistics | 2021 |
| Ducan Logistic Limited | Transport & logistics | 2017 |
| Duck and Cloud Ltd | Hospitality | 2023 |
| Duck EGG Mortgages Ltd | Financial services | 2016 |
| Duck Samosa Ltd | Professional & scientific | 2025 |
| Duckletts Limited | Administrative & support | 2017 |
| Ducoclothing.Com Limited | Other services | 2025 |
| Ducting Direct Ltd | Wholesale & retail | 2020 |
| Ducting Express Services Ltd | Water & waste | 2011 |
| Duddington Scott Limited | Information & communication | 2015 |
| Dudley Street Developments Limited | Real estate | 2021 |
| Dudtrans Ltd | Transport & logistics | 2025 |
| Duffy's Bar Limited | Hospitality | 2014 |
| Dugsy Tuition Centre Limited | Education | 2025 |
| Duhra Limited | Real estate | 2024 |
| Duke & Rossi Ltd | Wholesale & retail | 2020 |
| Duke and Duchess Enterprise Ltd | Real estate | 2026 |
| Dulai HS Ltd | Wholesale & retail | 2025 |
| Dulcie Barre Ltd | Wholesale & retail | 2024 |
| Duley Building Services Ltd | Construction | 2021 |
| Dulhan Mandap Ltd | Hospitality | 2019 |
| Dulogix Ltd | Transport & logistics | 2019 |
| Dulverton Homes Limited | Real estate | 2024 |
| Duma Haulage Limited | Transport & logistics | 2025 |
| Dumitrescu Trans Limited | Transport & logistics | 2018 |
| Dunbridge Haulage Ltd | Transport & logistics | 2014 |
| Duncan Convenience Ltd | Wholesale & retail | 2026 |
| Duncan Estates Limited | Real estate | 2007 |
| Duncan Investments Limited | Real estate | 1986 |
| Duncan Land Limited | Real estate | 2000 |
| Duncan Residential Limited | Real estate | 2007 |
| Duncombe Burley Ltd | Wholesale & retail | 2024 |
| Dune Corp Limited | Information & communication | 2023 |
| Dunelm (Soft Furnishings) Ltd | Manufacturing | 1987 |
| Dunelm Estates Limited | Extraterritorial | 2003 |
| Dunelm Group PLC | Professional & scientific | 2003 |
| Dunelm Limited | Professional & scientific | 2004 |
| Dunes Cosmetics Limited | Health & social care | 2021 |
| Dunhall Property Limited | Construction | 2006 |
| Dunlop Lions Football Club CIC | Education | 2026 |
| Dunn L Limited | Wholesale & retail | 2018 |
| Dunnington Quality Ltd | Wholesale & retail | 2014 |
| Dunscar Transport Ltd | Transport & logistics | 2014 |
| Dunstall Carter Ltd | Wholesale & retail | 2025 |
| Dunton Bassett Arms Restaurant Limited | Hospitality | 2019 |
| Dunton Trading Limited | Wholesale & retail | 2024 |
| Dupe. Ltd | Manufacturing | 2025 |
| Dupli Limited | Professional & scientific | 1988 |
| Duplus Architectural Systems Limited | Manufacturing | 1957 |
| Dupont PAY Ltd | Administrative & support | 2024 |
| Duragreen Lighting UK Ltd | Professional & scientific | 2015 |
| Duralean UK Ltd | Manufacturing | 2021 |
| Durant Sports Limited | Wholesale & retail | 2007 |
| Durga Construction Ltd | Construction | 2024 |