| D.J.Wright Holdings Limited | Extraterritorial | 2016 |
| D.N.Z Kebab Limited | Hospitality | 2018 |
| D.O.E.Precision Grinding Ltd | Professional & scientific | 2007 |
| D.Pitcher Property Ltd | Real estate | 2022 |
| D.S. Waker Driveways & Patios Limited | Construction | 2003 |
| D10 Consulting Ltd | Professional & scientific | 2023 |
| D23 Limited | Real estate | 2024 |
| D3 Electrical Ltd | Construction | 2017 |
| D3D Innovations Limited | Manufacturing | 2013 |
| D4D Consulting Ltd | Professional & scientific | 2018 |
| DA Capo Developments Limited | Construction | 2016 |
| DA Cruz Company Limited | Wholesale & retail | 2025 |
| DA Santos Developments Ltd | Real estate | 2024 |
| DA Santos Ltd | Professional & scientific | 2023 |
| Daach Services Ltd | Construction | 2025 |
| Daaco Group Ltd | Professional & scientific | 2015 |
| Dabs Developments Limited | Real estate | 2015 |
| DAC Marine Ltd | Manufacturing | 2022 |
| Dacar Logistics Limited | Transport & logistics | 2015 |
| Dacem Services Limited | Education | 2014 |
| Daeco Limited | Manufacturing | 2010 |
| Daedreams Ltd | Manufacturing | 2024 |
| Daftari Codes Ltd | Information & communication | 2026 |
| Dahlia Court Right to Manage Company Limited | Households | 2006 |
| Daiffe Ltd | Water & waste | 2025 |
| Daisy Cottage Property Management Ltd | Real estate | 2019 |
| Daisy Hardman Studio Ltd | Professional & scientific | 2024 |
| DAL (Dorset) Limited | Administrative & support | 2021 |
| DAL Electrical Group Ltd | Construction | 2016 |
| Dalaran Ltd | Administrative & support | 2025 |
| Dale Racing Limited | Wholesale & retail | 2013 |
| Dalgety Bay Consulting Ltd | Financial services | 2017 |
| Dalgety Bay Limited | Real estate | 2019 |
| Dalkeith Estates Limited | Real estate | 2015 |
| Dalmeny Holdings Limited | Real estate | 2026 |
| Dalmeny House (Freehold) Company Limited | Households | 2009 |
| Dalmeny House Management Company Limited | Households | 2001 |
| Dalmeny Limited | Real estate | 2017 |
| Dalogik Ltd | Wholesale & retail | 2021 |
| Damas Crafts Ltd | Extraterritorial | 2020 |
| Damhumbat Limited | Wholesale & retail | 2024 |
| Damian Rados Ltd | Manufacturing | 2023 |
| Damo Sings Entertainment Ltd | Arts & recreation | 2025 |
| Damp Proofing Dorset Limited | Construction | 2025 |
| Dampneys Limited | Agriculture & fishing | 1955 |
| DAN Homes Limited | Real estate | 2022 |
| DAN Mclean Ltd | Manufacturing | 2023 |
| DAN Newman Developments Ltd | Construction | 2025 |
| Dan's Botanical Hydrosols Ltd | Other services | 2025 |
| Dana Studio Ltd | Other services | 2020 |
| Dance Easy Ltd | Extraterritorial | 2024 |
| Danchev Ltd | Transport & logistics | 2018 |
| Dancing Moose Limited | Hospitality | 2019 |
| Dandax Properties Ltd | Real estate | 2021 |
| Dandy Life ENT Ltd | Wholesale & retail | 2025 |
| Danestream Developments Limited | Construction | 2025 |
| Daniel Gaiu Limited | Transport & logistics | 2025 |
| Daniel Heights Management Company Limited | Households | 1988 |
| Daniel M Tech Ltd | Information & communication | 2026 |
| Daniel Meaden Ltd | Information & communication | 2017 |
| Daniel Neville Ltd | Professional & scientific | 2026 |
| Daniel Shurey Holdings Limited | Financial services | 2017 |
| Daniel&Company BR Limited | Wholesale & retail | 2025 |
| Danielle Fontaine Ltd | Extraterritorial | 2026 |
| Danielle Mccurdy Consulting Ltd | Professional & scientific | 2022 |
| Daniels and Thomas Limited | Information & communication | 2020 |
| Dankaarowcon Limited | Administrative & support | 2021 |
| Danny Austin Joinery Co Ltd | Manufacturing | 2026 |
| Dannyspecialists Ltd | Information & communication | 2026 |
| Dansezie Limited | Wholesale & retail | 1987 |
| Danske Padel Klip Limited | Information & communication | 2025 |
| Dantas Company Limited | Professional & scientific | 2026 |
| Danzey Quality Services Limited | Professional & scientific | 2025 |
| Dapple & DOT Designs Limited | Professional & scientific | 2025 |
| Dara Ltd | Construction | 2014 |
| Darev BR Limited | Wholesale & retail | 2025 |
| Dargeo Limited | Real estate | 2013 |
| Dargeo Residential Ltd | Real estate | 2020 |
| Daring Works Limited | Professional & scientific | 2020 |
| Darius Trans Ltd | Transport & logistics | 2020 |
| Darius-Victor Nicolaev Ltd | Health & social care | 2018 |
| Dark Stream Group Ltd | Manufacturing | 2025 |
| Darkolphin Ltd | Information & communication | 2025 |
| Darlena Limited | Wholesale & retail | 1967 |
| Darling Twigs Limited | Wholesale & retail | 2026 |
| Darracott Limited | Wholesale & retail | 2015 |
| Dartfront Limited | Information & communication | 1986 |
| Darwin 200 Limited | Education | 2019 |
| DARWIN200 Voyages Limited | Administrative & support | 2026 |
| DAS Care Holding Ltd | Professional & scientific | 2023 |
| Dash Analytics Ltd | Information & communication | 2018 |
| Dassia Limited | Extraterritorial | 2015 |
| Data Artisans Consulting Ltd | Professional & scientific | 2025 |
| Data Discovery Services Ltd | Information & communication | 2015 |
| Data Opportunity Limited | Construction | 1994 |
| Data POP Ltd | Information & communication | 2021 |
| Datadyne Technologies Ltd | Information & communication | 2024 |
| Dataley Ltd | Information & communication | 2007 |
| Datapult Ltd | Information & communication | 2025 |
| Datastruct Limited | Professional & scientific | 2024 |