| Detox Events Limited | Hospitality | 2025 |
| Deultimate Ventures Ltd | Administrative & support | 2026 |
| DEV Agam Transport Limited | Transport & logistics | 2026 |
| DEV Builders Ltd | Construction | 2023 |
| DEV Capital Holdings Limited | Financial services | 2026 |
| Devaney Haulage Limited | Transport & logistics | 1986 |
| Devcon Solutions Ltd | Information & communication | 2023 |
| Development Consultant Limited | Construction | 2020 |
| Development Project Services Limited | Professional & scientific | 2017 |
| Devine Customz Limited | Wholesale & retail | 2023 |
| Devine Studio Limited | Wholesale & retail | 2025 |
| Devines Solutions Ltd | Construction | 2019 |
| Devlan Property Investments Ltd | Real estate | 2022 |
| Devtuc Ltd | Information & communication | 2024 |
| Dewat Group Limited | Real estate | 2022 |
| Dews Holdings Ltd | Wholesale & retail | 2024 |
| Dexent Ltd | Wholesale & retail | 2026 |
| Dexter SEO LAB Ltd | Information & communication | 2025 |
| Deyes Digital Limited | Information & communication | 2026 |
| DF 3 Limited | Wholesale & retail | 2022 |
| DF Group (Midlands) Limited | Construction | 2025 |
| DF Kids Collection Ltd | Wholesale & retail | 2024 |
| DF Penn Limited | Hospitality | 2021 |
| Dfab Care Limited | Health & social care | 2023 |
| DFG Construction Limited | Manufacturing | 2017 |
| DG Healthcare Ltd | Health & social care | 2024 |
| DG Pharma Health Ltd | Health & social care | 2025 |
| DG Technologies Limited | Other services | 2012 |
| DGB Property Holdings Ltd | Real estate | 2021 |
| DGF & MAM Thompson Farms Limited | Agriculture & fishing | 2015 |
| DGH Property Group Limited | Real estate | 2025 |
| Dgill Transport Ltd | Transport & logistics | 2026 |
| Dgjs Properties Limited | Real estate | 2025 |
| DGM Global Ltd | Administrative & support | 2022 |
| DGN Global Investments Ltd | Real estate | 2026 |
| DGN Pumping Ltd | Construction | 2019 |
| DGR Constructions Limited | Manufacturing | 2023 |
| Dgrd Ltd | Transport & logistics | 2025 |
| DGS Group Holdings Limited | Financial services | 2023 |
| DGS Property Group Limited | Real estate | 2022 |
| DH Bricklaying Ltd | Construction | 2018 |
| DH Roofing Limited | Construction | 2014 |
| DH2004 Ltd | Professional & scientific | 2025 |
| Dhadda Management Agency Limited | Wholesale & retail | 2006 |
| Dhadda Property Management Ltd | Real estate | 2016 |
| Dhaliwal Carries Ltd | Administrative & support | 2022 |
| Dhaliwal Holdings Limited | Real estate | 2019 |
| Dhaliwal Housing Ltd | Real estate | 2017 |
| Dhami Accommodation Limited | Real estate | 2000 |
| Dhanjal Holdings Ltd | Real estate | 2021 |
| Dhanoa Construction Limited | Construction | 2025 |
| Dhanoa Holdco 1 Limited | Financial services | 2024 |
| Dhanoa Holdco 2 Limited | Financial services | 2024 |
| Dhanoa Newco Limited | Financial services | 2024 |
| Dhanu IT Solutions Ltd | Information & communication | 2025 |
| Dhanvantari Asclepius Regen MSK Solutions Ltd | Health & social care | 2025 |
| Dhanyalakshmi Company Ltd | Hospitality | 2026 |
| Dhari Singh Limited | Transport & logistics | 2024 |
| Dhariwal Estates Ltd | Real estate | 2023 |
| Dharm Shropshire CIC | Administrative & support | 2025 |
| Dharma Transport Ltd | Transport & logistics | 2023 |
| Dhatt Transport Ltd | Transport & logistics | 2018 |
| Dheensa Properties Limited | Real estate | 2023 |
| DHI Investments Ltd | Financial services | 2021 |
| Dhillon Courier U.K. Ltd | Transport & logistics | 2019 |
| Dhillon Health Limited | Health & social care | 2008 |
| Dhillon Homes Ltd | Real estate | 2019 |
| Dhillon OFF License & Groceries Limited | Wholesale & retail | 2020 |
| Dhillon Property Developers Ltd | Construction | 2022 |
| Dhillon's Digital Marketing Ltd | Information & communication | 2023 |
| Dhol Frequency Ltd | Wholesale & retail | 2025 |
| DHX Medical Ltd | Wholesale & retail | 2025 |
| DI3BIS Ltd | Health & social care | 2014 |
| Diablo Design and Multimedia Ltd | Information & communication | 2013 |
| Diaconu Trans MNS Ltd | Transport & logistics | 2016 |
| Diagleccy Automotive Solutions Ltd. | Wholesale & retail | 2026 |
| Dialect Coffee Ltd | Manufacturing | 2022 |
| Diamond Adverts Limited | Professional & scientific | 2024 |
| Diamond Armada Limited | Arts & recreation | 2018 |
| Diamond Car Wash Valet Ltd | Administrative & support | 2025 |
| Diamond Equestrian Pets and Embroidery Limited | Wholesale & retail | 2018 |
| Diamond Hand Wash Ltd | Administrative & support | 2026 |
| Diamond K Drilling Limited | Construction | 2002 |
| Diamond Nails 911 Ltd | Other services | 2024 |
| Diamond Overseas Ltd | Wholesale & retail | 2026 |
| Diamond Properties (MP) Ltd | Real estate | 2020 |
| Diamond Properties Group Ltd | Real estate | 2015 |
| Diamond Resuscitation Services UK Limited | Health & social care | 2015 |
| Dianaaureliamailat Ltd | Administrative & support | 2020 |
| Dianne Stanley Property Development Limited | Real estate | 2007 |
| DIB Systems Ltd | Information & communication | 2025 |
| Diddy Property Limited | Real estate | 2024 |
| Digality LLP | | 2019 |
| Digbath Management Company Limited | Households | 1994 |
| Digby Carver Holdings Limited | Real estate | 2025 |
| Digestley Ltd | Information & communication | 2024 |
| Digi SEO Firm Ltd | Information & communication | 2025 |
| Digiaims Ltd | Information & communication | 2024 |
| Digian Transport Ltd | Transport & logistics | 2005 |
| Digicom Components Limited | Professional & scientific | 2006 |