| Dbrcn Consulting Limited | Information & communication | 2025 |
| DC & E Limited | Wholesale & retail | 2025 |
| DCA Commercial Property Ltd | Real estate | 2023 |
| DCA Kent Ltd | Wholesale & retail | 2018 |
| DCA Maidstone Ltd | Real estate | 2020 |
| DCB Networks Limited | Information & communication | 2018 |
| Dcck Management Ltd | Construction | 1999 |
| Dclx London Ltd | Administrative & support | 2020 |
| Dclx Productions Ltd | Professional & scientific | 2020 |
| DCS Homes Ltd. | Construction | 2014 |
| DCS Trading Limited | Administrative & support | 2007 |
| DCS Training Services Ltd | Education | 2022 |
| DD Elec Limited | Construction | 2013 |
| DD Home Solutions Ltd | Construction | 2025 |
| DD Retail Ltd | Professional & scientific | 2024 |
| DDK UK Services Ltd | Transport & logistics | 2021 |
| DDL Group Ltd | Financial services | 2023 |
| DDL150 Limited | Households | 2011 |
| DDR Guard Dogs Limited | Professional & scientific | 2018 |
| DDV Construction Limited | Construction | 2015 |
| DE Graaff & Partners Limited | Professional & scientific | 2003 |
| Deal & Sandwich PCN Limited | Health & social care | 2023 |
| Deal Cleaning Limited | Transport & logistics | 2019 |
| Deal Pier Kitchen Limited | Hospitality | 2018 |
| Deal Storage Solutions Ltd | Administrative & support | 2024 |
| Dean Caston Enterprises Ltd | Professional & scientific | 2013 |
| Dean Glover Plumbing and Heating Ltd | Construction | 2016 |
| Deanswood Equestrian Centre Limited | Agriculture & fishing | 2006 |
| Dearest Care Ltd | Health & social care | 2023 |
| Dearr Ltd | Construction | 2025 |
| Debex Dine Limited | Hospitality | 2020 |
| Deborah Trott Limited | Real estate | 2024 |
| Deborah Turner Ltd | Professional & scientific | 2013 |
| Decode IT Limited | Information & communication | 2011 |
| Decorate Party Ltd | Wholesale & retail | 2024 |
| Decorative Resins International Limited | Manufacturing | 1998 |
| Decort Property Services Limited | Real estate | 2024 |
| Deductly Ltd | Information & communication | 2025 |
| Dedushi Co Ltd | Real estate | 2024 |
| Deeside Precision Engineering Limited | Wholesale & retail | 2011 |
| Defiant Industry & Enterprise Ltd | Manufacturing | 2025 |
| Definitive Decor Ltd | Construction | 2017 |
| Definitive Properties Ltd | Real estate | 2025 |
| Dejavusmell Ltd | Wholesale & retail | 2026 |
| Delhi and Spice Limited | Hospitality | 2025 |
| Deli and Spice Ltd | Hospitality | 2026 |
| Delicious Food Production Limited | Manufacturing | 2025 |
| Delightmarvel Limited | Real estate | 2017 |
| Delivery M87 Ltd | Transport & logistics | 2016 |
| Delivery STN Ltd | Transport & logistics | 2016 |
| Deliveryboxx Ltd | Manufacturing | 2020 |
| Delmar Management LLP | | 2015 |
| Delron Services Limited | Construction | 1984 |
| Delsab Ltd | Information & communication | 2017 |
| Delta House Group Limited | Financial services | 2025 |
| Delta House Maintenance Limited | Other services | 1993 |
| Delta Initiatives Limited | Professional & scientific | 2014 |
| Delta Transport Group Limited | Other services | 2019 |
| Delta UK Express Limited | Other services | 2009 |
| Deltta Bussiness Consulting Ltd | Professional & scientific | 2025 |
| Deltta Properties Ltd | Households | 2025 |
| Delulu Marketing Ltd | Professional & scientific | 2024 |
| Demarc Solutions Ltd | Administrative & support | 2010 |
| Demir Holding Ltd | Real estate | 2017 |
| Demirbasa Limited | Construction | 2017 |
| Demnife Limited | Other services | 2019 |
| Dempson Holdings Ltd | Financial services | 2022 |
| Dempson Limited | Manufacturing | 1962 |
| Denbury Associates Ltd | Administrative & support | 2010 |
| Dench Consulting Limited | Professional & scientific | 2021 |
| Denford Associates Limited | Information & communication | 2011 |
| Denix Ltd | Wholesale & retail | 2024 |
| DENIZ13 Ltd | Hospitality | 2024 |
| Dennis & Jessy Ltd | Hospitality | 2025 |
| Dennis of Bexley Limited | Wholesale & retail | 2004 |
| DENNY2010 Ltd | Transport & logistics | 2020 |
| Dentonhr Ltd | Administrative & support | 2015 |
| Denzel Consulting Ltd | Information & communication | 2018 |
| Deo-Veritas Limited | Professional & scientific | 2009 |
| DEP Healthcare Limited | Health & social care | 2015 |
| Derevenskii Limited | Transport & logistics | 2018 |
| Derienzo Properties Ltd | Real estate | 2025 |
| Derm Care Essentials Limited | Health & social care | 2022 |
| Dermal Skin Ltd | Other services | 2011 |
| Designbox Studio Ltd | Other services | 2002 |
| Designe Color Ltd | Wholesale & retail | 2025 |
| Designed by ME Limited | Arts & recreation | 2016 |
| Designsbylaurence Limited | Wholesale & retail | 2024 |
| Designscape Consultancy Ltd | Professional & scientific | 2004 |
| Designscape Consultants Limited | Professional & scientific | 2026 |
| Destiny Alignment Ltd | Health & social care | 2024 |
| Detailed Construction Consultancy Ltd | Professional & scientific | 2024 |
| Detect&Treat Ltd | Professional & scientific | 2024 |
| Detling Car and Commercial Breakers Ltd | Other services | 2012 |
| Detling Car Breakers & Parts Ltd | Wholesale & retail | 2025 |
| Detling Community Interest Company | Wholesale & retail | 2017 |
| Detling Property Investments Limited | Real estate | 2018 |
| Detofabim Ltd | Health & social care | 2025 |
| Devcon Commercial Limited | Construction | 2020 |
| Devcon Limited | Construction | 2013 |