| Decimus LPH Limited | Construction | 2021 |
| Decimus Palace Limited | Real estate | 2017 |
| Decimus Park Management Limited | Households | 2004 |
| Decimus Place Limited | Households | 2002 |
| Decimus Property (Hastings) Limited | Construction | 2017 |
| Decimus Property (Minster) Limited | Construction | 2017 |
| Decimus Property (RYE) Limited | Construction | 2017 |
| Decimus Property (Wittersham) Limited | Real estate | 2022 |
| Decuevas Limited | Extraterritorial | 2010 |
| DEE Consults Limited | Information & communication | 2025 |
| Deebee Solutions Limited | Information & communication | 1998 |
| Deep Dark Wood Holdings Ltd | Agriculture & fishing | 2015 |
| Deep Field Ltd | Professional & scientific | 2026 |
| Deer Park Campsite Eridge Ltd | Hospitality | 2021 |
| Deer Park Campsite Ltd | Hospitality | 2021 |
| Defda Limited | Information & communication | 2010 |
| Dekha Ltd | Professional & scientific | 2010 |
| DEL Vincent Watches Limited | Wholesale & retail | 2025 |
| Delandrews Ltd | Hospitality | 2014 |
| Deliverance Arts Limited | Administrative & support | 2012 |
| Delphinus Caeruleus LLP | | 2017 |
| Delta Bravo Aviation Ltd | Education | 2024 |
| Delta Fencing & Landscaping Limited | Construction | 2020 |
| Delta Fencing Limited | Administrative & support | 2021 |
| Delta of Phoenix Ltd | Wholesale & retail | 2022 |
| Deltacrown, Fooks and French Ltd | Wholesale & retail | 1993 |
| Deltag Properties Limited | Real estate | 2017 |
| Demon Skinz Ltd | Wholesale & retail | 2010 |
| Denim Creative Limited | Administrative & support | 2006 |
| Denington Court (Southborough) Limited | Households | 1987 |
| Denny Commercial Ltd | Real estate | 2025 |
| Denny Plastics (2018) Limited | Manufacturing | 2018 |
| Denny Plastics LLP | | 2009 |
| Denside Consultancy Ltd | Professional & scientific | 2005 |
| Densix Limited | Manufacturing | 2025 |
| Denstaff Investments Limited | Financial services | 2025 |
| Denstaff Ltd | Other services | 2015 |
| Dent Rewind Limited | Wholesale & retail | 2006 |
| Denth Design Ltd | Professional & scientific | 2025 |
| Deon Sensky Creative Limited | Professional & scientific | 2012 |
| Departure Point Ltd | Administrative & support | 2013 |
| Depth of Focus Limited | Information & communication | 2006 |
| Derek Burbridge Industrial Roofing & Cladding Limited | Wholesale & retail | 2000 |
| Derivatives Development Consultants Limited | Professional & scientific | 2014 |
| Dermatologist’S Choice Limited | Other services | 2022 |
| Dermatology Consulting Ltd | Other services | 2011 |
| Dermatology Consulting Skincare Creams Limited | Other services | 2022 |
| Derwent Private Drive Ltd | Households | 2024 |
| Design to Communicate Ltd | Professional & scientific | 2010 |
| Designed for Living (T.W.) Limited | Administrative & support | 2005 |
| Designmatic Limited | Arts & recreation | 2004 |
| Designs Roofing and Building Ltd | Construction | 2023 |
| Deskrenter Limited | Information & communication | 2015 |
| Destinyhomes Limited | Construction | 1995 |
| Devarish Investments Ltd | Real estate | 2020 |
| Dewhurst Hallam Holdings Limited | Real estate | 2025 |
| DF Fresh Produce Limited | Wholesale & retail | 2012 |
| Dfhtys Limited | Wholesale & retail | 2025 |
| Dfsecurity Solutions Ltd | Administrative & support | 2013 |
| Dhir & Dhir Holdings Limited | Construction | 2023 |
| Dhir & Dhir Limited | Real estate | 2011 |
| DHO Investments Ltd | Financial services | 2013 |
| DI Santo and Family Ltd | Other services | 2024 |
| Diablo Aquila Ltd | Information & communication | 2026 |
| Dial My Taxi Ltd | Transport & logistics | 2019 |
| Diamond Cleaning Service Kent Ltd | Other services | 2016 |
| Dickens Developments (UK) LLP | | 2003 |
| Dickens Developments Limited | Construction | 1997 |
| Didactic Services Limited | Professional & scientific | 2010 |
| Diffusion Technologies Limited | Professional & scientific | 2021 |
| Digifiling Limited | Information & communication | 2024 |
| Digimed Limited | Information & communication | 2011 |
| Digital 8 Ltd | Administrative & support | 2016 |
| Digital Chiefs Holdings Limited | Information & communication | 2022 |
| Digital Endeavours Ltd | Information & communication | 2022 |
| Digital Finance Director Ltd | Administrative & support | 2015 |
| Digital Oriented Ltd | Information & communication | 2015 |
| Digital Sales Consortium Ltd | Information & communication | 2023 |
| Digital ZEN Consulting Ltd | Information & communication | 2018 |
| Digitally Yours Limited | Professional & scientific | 2026 |
| Digitalpark UK Limited | Information & communication | 2015 |
| Dignity by Wade Ltd | Wholesale & retail | 2019 |
| Dignity Dining Ltd | Wholesale & retail | 2021 |
| Dignity Healthcare Group Ltd | Wholesale & retail | 2021 |
| Dijital Consulting Ltd | Professional & scientific | 2025 |
| Diligent Focus LLP | | 2019 |
| Dimittere Ltd. | Real estate | 2017 |
| Dingley Dell Property Limited | Construction | 2018 |
| Direct Design and Packaging Limited | Administrative & support | 1988 |
| Directive Planning and Developments Ltd | Administrative & support | 2024 |
| Disco Dressage Ltd | Education | 2020 |
| Discover EV Limited | Information & communication | 2019 |
| Display Dummies Ltd | Arts & recreation | 2011 |
| Disposall Limited | Water & waste | 2022 |
| Disruptive Creative Ltd | Professional & scientific | 2023 |
| Dittons Amenity Company (NO.2) Limited | Real estate | 1996 |
| Divine Day Ltd | Information & communication | 2015 |
| Divine Digital Technologies Ltd | Wholesale & retail | 2024 |
| Diwan Consulting Limited | Professional & scientific | 2007 |
| Dixon Deboise (South West) Limited | Professional & scientific | 2004 |