| DAH Consultants Limited | Professional & scientific | 2022 |
| Dahdal Ltd | Hospitality | 2021 |
| Dahmer Ltd | Extraterritorial | 2023 |
| Dainesy Group Limited | Water & waste | 2024 |
| Dainesy Scaffolding Sales Limited | Water & waste | 2026 |
| DAJ Aviation Ltd | Manufacturing | 2019 |
| Dals Barbers Ltd | Other services | 2014 |
| Dalton Watson Fine Books Ltd | Information & communication | 2002 |
| Daltrey Mortgage Services Ltd | Financial services | 2020 |
| DAM Design & Build Limited | Construction | 2019 |
| DAM Design & Engineering Limited | Professional & scientific | 2018 |
| Dame 31 Partnership Limited | Real estate | 2015 |
| Damon Brock Limited | Arts & recreation | 2020 |
| Damont Productions Ltd | Arts & recreation | 2009 |
| Damp Plaster Render Solutions UK Ltd | Construction | 2019 |
| DAN Arnold Bird and Pest Solutions Ltd | Administrative & support | 2022 |
| Danahair Ltd | Other services | 2019 |
| Dancing Aardvarks Limited | Information & communication | 2001 |
| Danfire Ltd | Construction | 2021 |
| Daniel Pelton Ltd | Other services | 2011 |
| Daniel Sean Jewellery Limited | Other services | 2022 |
| Danielle's Beauty Studio Ltd | Other services | 2023 |
| Dansoft Consultancy Solutions Limited | Information & communication | 1995 |
| Danu Books Ltd | Information & communication | 2021 |
| Danza Fuego Ltd | Professional & scientific | 2024 |
| Dapaah Services Limited | Administrative & support | 2023 |
| Dara Investments & Holdings Ltd | Real estate | 2024 |
| Darac Ltd | Wholesale & retail | 1998 |
| Darco Artist Holdings Limited | Financial services | 2026 |
| Darco Artist Partnerships Limited | Professional & scientific | 2024 |
| Darco Artist Publishing Limited | Information & communication | 2026 |
| Darco Holdings Limited | Financial services | 2024 |
| Darco Song Management Ltd | Information & communication | 2026 |
| Darin 7 Ltd | Wholesale & retail | 2025 |
| Dark Blue Consultancy Limited | Administrative & support | 2022 |
| Darling & Baguley Limited | Professional & scientific | 2002 |
| Darling Beach Huts Limited | Real estate | 2021 |
| Darwin Resources Limited | Administrative & support | 2021 |
| Darza Productions Ltd. | Arts & recreation | 2017 |
| Dash Dash DOT Ltd | Information & communication | 2021 |
| Daspire Consulting Ltd | Information & communication | 2025 |
| Data Tracking Ltd | Information & communication | 2013 |
| DATA2U Limited | Extraterritorial | 2002 |
| Datum Interiors Ltd | Other services | 2020 |
| Datum M&E Ltd | Construction | 2026 |
| Davan Building Contractors Ltd | Construction | 2025 |
| Dave's Commercials Ltd | Wholesale & retail | 2003 |
| Davey Seafish Limited | Agriculture & fishing | 2011 |
| David & Curtis Property Maintenance Ltd | Administrative & support | 2023 |
| David Donegan Ltd | Arts & recreation | 1999 |
| David Gann Partnership Ltd | Professional & scientific | 2024 |
| David Goldman Photography Limited | Professional & scientific | 2012 |
| David Jarman Accountants Ltd | Professional & scientific | 2011 |
| David Langhorne Limited | Professional & scientific | 2017 |
| David N Prosser Plumbing & Heating Ltd | Construction | 2009 |
| David O Jones Sports Limited | Wholesale & retail | 2011 |
| David Venus & Company LLP | | 2004 |
| Daving Investments (UK) Limited | Real estate | 2000 |
| Davis & Co Financial Solutions Ltd | Financial services | 2020 |
| Davis & Davis Limited | Financial services | 2003 |
| Dawson Liquid Coatings Ltd | Construction | 2008 |
| Day Family Investment Company Ltd | Financial services | 2019 |
| Daylight Systems Southern Limited | Construction | 2012 |
| Dazzle Pictures UK Limited | Information & communication | 2024 |
| Dazzling Decor Limited | Wholesale & retail | 2011 |
| DB Capital Limited | Financial services | 2009 |
| Dbtechne Limited | Professional & scientific | 2025 |
| DCC Media Ltd | Professional & scientific | 2024 |
| Dd&T Engineering Limited | Administrative & support | 2015 |
| Ddbg Properties Limited | Real estate | 2017 |
| Ddbg Rentals Limited | Real estate | 2025 |
| DE Classic Africa Store Limited | Wholesale & retail | 2026 |
| DE Pazzi Advisors Ltd | Professional & scientific | 2025 |
| DE Rosa-Maxted (Properties) Limited | Agriculture & fishing | 2023 |
| DE Rosa-Maxted Limited | Arts & recreation | 2012 |
| DE65DAN Limited | Financial services | 2026 |
| Dead Good Burrito Limited | Extraterritorial | 2011 |
| Dead Space Developments Ltd | Construction | 2019 |
| Deadspace Holdings Ltd | Real estate | 2019 |
| Dealflow Collective Ltd | Professional & scientific | 2024 |
| Dealflow Tech Ltd | Arts & recreation | 2024 |
| Deans Place Hotel Limited | Extraterritorial | 1997 |
| Debbie Smith Ltd | Health & social care | 2017 |
| Debbie Stevens Wellbeing Community Interest Company | Education | 2024 |
| Debttrace Limited | Information & communication | 2021 |
| DEC Solutions Limited | Health & social care | 2013 |
| Declan Dent Ltd | Health & social care | 2024 |
| Deco Cafe Ltd. | Hospitality | 2021 |
| Decon Advisory Limited | Professional & scientific | 2008 |
| Decon Propco Limited | Administrative & support | 2013 |
| Decorum EST Limited | Wholesale & retail | 2003 |
| DEE DEE Holdings Limited | Wholesale & retail | 2007 |
| DEE DEE Retail Limited | Wholesale & retail | 2002 |
| Deedees Findon Limited | Hospitality | 2022 |
| Deelan Services Limited | Real estate | 1987 |
| Deeper Change Ltd | Education | 2024 |
| Deeps Global Ltd | Information & communication | 2025 |
| Define Leadership Ltd | Education | 2022 |
| Definitive Design Limited | Professional & scientific | 2012 |
| Deft Properties Limited | Real estate | 2007 |