| Dibstones Ltd | Wholesale & retail | 2019 |
| Dickens Heath Development Company Limited | Professional & scientific | 2001 |
| Dickins Hydro Resources Limited | Professional & scientific | 2012 |
| Dickinson Tiling Ltd | Construction | 2015 |
| Dickson Training & Coaching Ltd | Professional & scientific | 2020 |
| Dickson Training Ltd | Professional & scientific | 2018 |
| Diddikicks Warrington Ltd | Arts & recreation | 2015 |
| Diddikicks Yorkshire Limited | Education | 2016 |
| Didsbury Gynaecology Limited | Health & social care | 2021 |
| Die-Set Formes Limited | Professional & scientific | 1998 |
| Dietary Assessment Ltd | Information & communication | 2017 |
| Diets Debunked Ltd | Health & social care | 2025 |
| Different Times Ltd | Professional & scientific | 2021 |
| Dig'Ins HUT Limited | Hospitality | 2021 |
| Digbyswift Ltd | Information & communication | 2012 |
| Digcom UK Holdings Ltd | Financial services | 2020 |
| Digi Merchant Ltd | Wholesale & retail | 2020 |
| Digibete C.I.C. | Health & social care | 2016 |
| Digibete Global Ltd | Health & social care | 2018 |
| Digicom Partners Ltd | Information & communication | 2026 |
| Digiestate Holdings Ltd | Real estate | 2024 |
| Digific Ltd | Information & communication | 2009 |
| Digilobster Ltd | Information & communication | 2023 |
| Digilytiks Ltd | Professional & scientific | 2023 |
| Diginoid Limited | Information & communication | 2016 |
| Digip Consulting Limited | Information & communication | 2025 |
| Digiplanet Techno Solutions Ltd | Information & communication | 2017 |
| Digiplex Technologies (Emea) Ltd. | Wholesale & retail | 2023 |
| Digiquip Group Limited | Information & communication | 2009 |
| Digisafe Compliance Ltd | Information & communication | 2023 |
| Digisafe Consulting Ltd. | Information & communication | 2019 |
| Digisight Limited | Information & communication | 2022 |
| Digisoft Technologies Ltd | Information & communication | 2018 |
| Digit Deck UK Ltd | Information & communication | 2023 |
| Digit-Blast Ltd | Information & communication | 2021 |
| Digital 4U Limited | Information & communication | 2010 |
| Digital 4U Services Limited | Construction | 2017 |
| Digital Apes Ltd | Professional & scientific | 2023 |
| Digital Bamboo Limited | Professional & scientific | 2011 |
| Digital Beehive Holdings Ltd | Financial services | 2021 |
| Digital Beehive Ltd | Information & communication | 2000 |
| Digital Brand Response Group Limited | Financial services | 2008 |
| Digital Brands Limited | Professional & scientific | 2011 |
| Digital Capital Management Ltd | Information & communication | 2018 |
| Digital Completion UK Ltd. | Information & communication | 2020 |
| Digital Construction International Limited | Administrative & support | 2010 |
| Digital Cunning Limited | Information & communication | 2017 |
| Digital Curiosity Ltd | Information & communication | 2024 |
| Digital Depot Web Limited | Information & communication | 2017 |
| Digital Epix Ltd | Information & communication | 2023 |
| Digital Expressions Ltd | Information & communication | 2023 |
| Digital Financial Services Consulting Ltd | Information & communication | 2019 |
| Digital Future Today Ltd | Information & communication | 2018 |
| Digital Gaff Ltd | Information & communication | 2020 |
| Digital Goldcrest Hub Ltd | Information & communication | 2025 |
| Digital House PR Ltd | Professional & scientific | 2016 |
| Digital Identity Services Ltd | Information & communication | 2023 |
| Digital Intelligence Holdings Ltd | Information & communication | 2026 |
| Digital Kite Limited | Information & communication | 2014 |
| Digital Legal Marketing Limited | Information & communication | 2022 |
| Digital Library Limited | Information & communication | 2020 |
| Digital Media Assistance Ltd | Professional & scientific | 2020 |
| Digital Mill Limited | Information & communication | 2021 |
| Digital Panther Limited | Manufacturing | 2016 |
| Digital Plus Limited | Manufacturing | 2000 |
| Digital Program Solutions Limited | Information & communication | 2023 |
| Digital Rift Ltd | Information & communication | 2017 |
| Digital Signage Ltd | Manufacturing | 2023 |
| Digital Solutions Satellite Limited | Professional & scientific | 2003 |
| Digital Sterling Limited | Wholesale & retail | 2021 |
| Digital Toolbox Limited | Extraterritorial | 1996 |
| Digital Trails Ltd | Professional & scientific | 2017 |
| Digital Velocity Limited | Information & communication | 2014 |
| Digital Wealth Connect Ltd | Professional & scientific | 2019 |
| Digital Wealth Solutions Ltd | Professional & scientific | 2017 |
| Digital Weft Ltd | Information & communication | 2026 |
| Digitaly Media Limited | Other services | 2023 |
| Digitronix Ltd. | Manufacturing | 1995 |
| Digiwall Media Ltd | Information & communication | 2010 |
| Dignified Retreats Ltd | Hospitality | 2021 |
| Digwa Homes Limited | Real estate | 2019 |
| Digwa Properties Ltd | Real estate | 2025 |
| DII12 (Assetco) Limited | Administrative & support | 2018 |
| DII21 (Assetco) Limited | Administrative & support | 2019 |
| DII22 (Assetco) Limited | Administrative & support | 2019 |
| DII42 (Assetco) Limited | Administrative & support | 2022 |
| Diia's Outfits Limited | Manufacturing | 2020 |
| Dikran Construction Ltd | Construction | 2020 |
| Diktyo Economics Limited | Professional & scientific | 2025 |
| DIL Investments Limited | Real estate | 2025 |
| Dilbagh Transport Solutions Ltd | Transport & logistics | 2026 |
| Dilectus Contract Solutions Ltd | Administrative & support | 2012 |
| Dilectus Recruitment Solutions Ltd | Administrative & support | 2006 |
| Dileep Limited | Construction | 2019 |
| Diligent Debt Recovery Limited | Administrative & support | 2022 |
| Diligent Enterprises Limited | Wholesale & retail | 2022 |
| Diligent Healthcare Service Ltd | Health & social care | 2022 |
| Diligise Limited | Professional & scientific | 2012 |
| Dilke Street Property Limited | Real estate | 2023 |
| Dill & Sons Limited | Wholesale & retail | 1964 |