| Datavision Consulting Limited | Information & communication | 2023 |
| Datchet Property Ltd | Real estate | 2022 |
| Date Warden Ltd | Information & communication | 2024 |
| Datshmates Gadgets Ltd | Wholesale & retail | 2025 |
| DAV Patisserie Ltd | Hospitality | 2023 |
| Davey and Alger Ltd | Manufacturing | 2019 |
| David Dale Building Contracts Limited | Other services | 2017 |
| David Frankham Concierge Services Ltd | Administrative & support | 2015 |
| David James Architects & Partners Limited | Professional & scientific | 2013 |
| David Wood Design Limited | Information & communication | 2018 |
| Davida Music Ltd | Information & communication | 2025 |
| Davidson Estates Sales & Lettings Ltd | Real estate | 2024 |
| Davidsonj's Ltd | Wholesale & retail | 2025 |
| Davies Housing Partnership Ltd | Real estate | 2025 |
| Davies March Limited | Information & communication | 2018 |
| Daviola Care Recruitment Limited | Administrative & support | 2024 |
| Davis & Dawson Limited | Real estate | 1981 |
| Dawkins 1969 Limited | Extraterritorial | 2014 |
| Daws Place Management Limited | Households | 2007 |
| Dawson Carpentry and Building Limited | Construction | 2020 |
| Daylesford Management Limited | Real estate | 2007 |
| Daylight Properties Limited | Households | 1989 |
| Days Homecare Services Limited | Health & social care | 2026 |
| Daysh Interiors Ltd | Construction | 2022 |
| Dayzeechainchildcare Ltd | Administrative & support | 2023 |
| DAZ T.A.R.S.Q. Limited | Education | 2016 |
| Dazzle Ship Creative Limited | Other services | 2009 |
| DBC Partners Limited | Financial services | 2025 |
| Dbox Services Ltd | Transport & logistics | 2019 |
| DBR Dorset Limited | Construction | 2026 |
| DC Allen (Holdings) Limited | Professional & scientific | 2013 |
| DC Carpet Cleaning Ltd | Administrative & support | 2019 |
| DC Energy Projects Ltd | Construction | 2024 |
| Dc-Digitalgeschäft Limited | Wholesale & retail | 2025 |
| DC2 Investments Ltd | Financial services | 2025 |
| DCD Training Services Limited | Education | 2024 |
| Dcdb Ltd | Professional & scientific | 2015 |
| Dceg Ltd | Information & communication | 2013 |
| Dcfh Ltd | Manufacturing | 2020 |
| DCG Investing Ltd | Information & communication | 2024 |
| DCM Audio Limited | Wholesale & retail | 2025 |
| DCM Composites Ltd | Manufacturing | 2024 |
| DCM Services Ltd | Manufacturing | 2025 |
| DCS Group BR Limited | Wholesale & retail | 2025 |
| Dctyp Composites Ltd | Manufacturing | 2024 |
| Dcwh Limited | Real estate | 2014 |
| DD Marine Electrical Ltd | Construction | 2022 |
| DDC Dolphin Holdings Limited | Professional & scientific | 2012 |
| DDC Dolphin International Limited | Manufacturing | 2012 |
| DDC Dolphin Limited | Manufacturing | 1991 |
| DDC Dolphin Ultimate Holdings Ltd | Professional & scientific | 2023 |
| DDC Letting Limited | Real estate | 2023 |
| Ddmclouds Ltd | Information & communication | 2021 |
| DDS Holdings Limited | Financial services | 2024 |
| DDS Media Limited | Administrative & support | 2017 |
| DE Lagny Business Services Ltd | Professional & scientific | 2014 |
| DE Lisle Partners LLP | | 2005 |
| DE Mauley Mews Management Company Limited | Administrative & support | 2006 |
| DE Monchy Aromatics Limited | Wholesale & retail | 1982 |
| DE Monchy Europe Purchasing Limited | Wholesale & retail | 2015 |
| DE Trading Ltd | Wholesale & retail | 2023 |
| Deaf Interpreter Ltd | Professional & scientific | 2021 |
| Dean Park Limited | Arts & recreation | 2014 |
| Dean Swift Development Limited | Construction | 2016 |
| Dean Teversham Roofing Limited | Construction | 2002 |
| Deancourt Developments Limited | Real estate | 2010 |
| Deancroft Limited | Construction | 2019 |
| Deans Court (Milford) Management Company Limited | Households | 1973 |
| Deansleigh House LLP | | 2026 |
| Deanwood House (Freehold) Limited | Real estate | 2002 |
| DEB Matthews Consulting Ltd | Professional & scientific | 2019 |
| Debt Settlement Limited | Financial services | 2025 |
| Deburring Centre Limited | Professional & scientific | 1996 |
| Dec-Ard Ltd | Manufacturing | 2025 |
| Decarbvalue Limited | Professional & scientific | 2024 |
| Decent Alliance CIC | Other services | 2026 |
| Dech Limited | Real estate | 2021 |
| Decifer Limited | Professional & scientific | 2023 |
| Decipher Physics Ltd | Education | 2025 |
| Decoded Consulting Limited | Information & communication | 2019 |
| Decorating by Owen Tierney Limited | Construction | 2025 |
| Decoriuma Ltd | Wholesale & retail | 2024 |
| Dedex Limited | Wholesale & retail | 2020 |
| Deep Glade Ltd | Real estate | 2019 |
| Deep Sunglasses Limited | Wholesale & retail | 2024 |
| Deepcove Limited | Professional & scientific | 2012 |
| Deer Photographer of the Year Ltd | Professional & scientific | 2022 |
| Defence and Construction Commercial Services Limited | Construction | 2024 |
| Defender Performance Diver Training Ltd | Education | 2022 |
| Defined Brows UK Ltd | Other services | 2024 |
| Dehappybox Ltd | Wholesale & retail | 2021 |
| Dehavilland Developments Limited | Construction | 2007 |
| Dejush Ltd | Wholesale & retail | 2022 |
| Dekades Ltd | Hospitality | 2021 |
| Dekcan GBL Ltd | Wholesale & retail | 2025 |
| Dekkabus Limited | Transport & logistics | 2015 |
| DEL MAR Estates Limited | Real estate | 2016 |
| Delahunty Properties Limited | Real estate | 2017 |
| Delian Growth Limited | Information & communication | 2020 |
| Delight Healthcare Solutions Ltd | Administrative & support | 2024 |