| Daniel Keymer Bradshaw Services Ltd | Construction | 2026 |
| Danlyn Properties Ltd | Real estate | 2021 |
| Danmarkus Ltd | Real estate | 2025 |
| Dannyk Ltd | Administrative & support | 2016 |
| Danson Drives and Patios Limited | Construction | 2014 |
| Dapper Scaffs Ltd | Construction | 2024 |
| Daren Whybrow Consulting Limited | Extraterritorial | 2023 |
| Daris Tele Limited | Information & communication | 2021 |
| Dark Iron Fabrications Ltd | Manufacturing | 2016 |
| Darling in Bloom Ltd | Wholesale & retail | 2025 |
| Darnley Grill Ltd | Hospitality | 2020 |
| Darrens Multitrade Ltd | Construction | 2017 |
| Dart Lettings Ltd | Real estate | 2009 |
| Dartford District Schools FA Limited | Arts & recreation | 2016 |
| Darvad Limited | Financial services | 2023 |
| Dasamoh Care Ltd | Health & social care | 2016 |
| Dasklug Ltd | Information & communication | 2021 |
| Data Connect Services Ltd | Information & communication | 2021 |
| Databilities Limited | Information & communication | 2020 |
| Datum Audio Ltd | Information & communication | 2025 |
| Dav&Ollie Limited Company Ltd | Health & social care | 2022 |
| Dave Atkins Interiors Ltd | Construction | 2013 |
| David Catt & Sons (Holdings) Limited | Financial services | 2020 |
| David Catt & Sons Limited | Hospitality | 2014 |
| David Property Development Ltd | Construction | 2018 |
| Davin Analytics Ltd | Extraterritorial | 2023 |
| Davis Building Maintenance Limited | Administrative & support | 2004 |
| Davitom Limited | Professional & scientific | 2022 |
| Davygok Consulting Ltd | Information & communication | 2021 |
| Daya Care Group (Medway) Ltd | Health & social care | 2021 |
| Daya Care Group Ltd | Health & social care | 2017 |
| Dayonesolver Ltd | Information & communication | 2022 |
| DB Civils & Construction Ltd | Construction | 2019 |
| DB Creative Electrical Services Ltd | Construction | 2018 |
| DB Fire Stoppers Ltd | Public administration | 2025 |
| DB Mechanical Ltd | Construction | 2015 |
| DB1 Electrical Limited | Construction | 2020 |
| Dbprofile Limited | Information & communication | 2010 |
| Dbuka Grills Limited | Hospitality | 2022 |
| Dbvr Ltd | Wholesale & retail | 2022 |
| DC Players Cars Ltd | Wholesale & retail | 2025 |
| DCH Property Services Ltd | Construction | 2017 |
| Dcma Ltd | Wholesale & retail | 2022 |
| DD Couriers Limited | Transport & logistics | 2025 |
| DDS Global Limited | Wholesale & retail | 2024 |
| DE Medici Associates Ltd | Construction | 2015 |
| Deadwood Developments Limited | Real estate | 2005 |
| Deadwood Enterprises Limited | Real estate | 2005 |
| Deadwood Estates Limited | Real estate | 2006 |
| Deadwood Properties Limited | Real estate | 2003 |
| Dealfinders Property Group Limited | Real estate | 2025 |
| Dean Foxx Management Limited | Information & communication | 2004 |
| Dean Robinson Limited | Professional & scientific | 2026 |
| Deanswood Contract Furnishings Limited | Manufacturing | 1976 |
| Deborah Carson Consulting Ltd | Professional & scientific | 2006 |
| Debossed Ltd | Administrative & support | 2015 |
| Debt Reduction and Services Limited | Financial services | 2009 |
| Decalslab Ltd | Manufacturing | 2018 |
| Decktronix Ltd. | Construction | 2015 |
| Deconiluk Ltd | Wholesale & retail | 2023 |
| Decorwell Limited | Construction | 2017 |
| Decovision Ltd | Wholesale & retail | 2023 |
| DEE Maison Ltd | Wholesale & retail | 2025 |
| Deesunnybeauty Ltd | Other services | 2025 |
| DEF Studios Limited | Other services | 2008 |
| Defib Supplies Ltd | Extraterritorial | 2013 |
| Delanimo Limited | Real estate | 2019 |
| Delce Fish Bar Limited | Hospitality | 2008 |
| Delce Store Ltd | Wholesale & retail | 2023 |
| Delga Labels Limited | Manufacturing | 2020 |
| Dellton Limited | Construction | 2021 |
| Deloros Ltd | Wholesale & retail | 2024 |
| DELPHI31 Limited | Information & communication | 2024 |
| Dencol Limited | Administrative & support | 2021 |
| Denis Green Jewellers Ltd | Wholesale & retail | 2017 |
| Denis Group Ltd | Construction | 2025 |
| Dennis and Sons Construction and Maintenance Limited | Construction | 2024 |
| Denny Property Investments Limited | Real estate | 2020 |
| Dennybay Limited | Construction | 2014 |
| Dental Art & Design Limited | Manufacturing | 2007 |
| Dentelligence Ltd | Health & social care | 2010 |
| Dentologie Ltd | Health & social care | 2021 |
| Denvar Personnel (Recruitment) Limited | Administrative & support | 2020 |
| Denyer's Doors and Windows Limited | Construction | 2023 |
| Derrick Property Resolutions Limited | Households | 2026 |
| Desado Enterprises Ltd | Construction | 2019 |
| Design Build Safely Limited | Construction | 2017 |
| Design Tags Limited | Wholesale & retail | 2022 |
| Designed Interiors of Deal Limited | Professional & scientific | 2016 |
| Designed Interiors of Kent Limited | Professional & scientific | 2014 |
| Despatch Bros Ltd | Wholesale & retail | 2023 |
| Developer Rocket Ltd | Information & communication | 2023 |
| Devotion Healthcare Limited | Administrative & support | 2015 |
| Devotion Property Solutions Ltd | Households | 2019 |
| Dewar's Property & Facility Maintenance Services Ltd | Manufacturing | 2021 |
| Dewun Ltd | Health & social care | 2024 |
| DG Roofing & Building Ltd | Construction | 2011 |
| DGA Constuction Ltd | Construction | 2021 |
| DGD Couriers Ltd | Transport & logistics | 2018 |
| DGH Construction (Kent) Limited | Professional & scientific | 2012 |