| D Lockley Accounts Ltd | Professional & scientific | 2025 |
| D Mustafoff Ltd | Construction | 2019 |
| D&B Building Services Ltd | Construction | 2019 |
| D&B Interiors Ltd | Construction | 2021 |
| D' Ultimate Ltd | Hospitality | 2020 |
| D-Links Solutions Ltd | Professional & scientific | 2016 |
| D. G. Decor Ltd | Construction | 2015 |
| D.G Acott Limited | Construction | 2019 |
| D.S. Beatus Construct Ltd | Construction | 2024 |
| D65 Limited | Manufacturing | 2009 |
| DA6 Fast Food Limited | Hospitality | 2025 |
| Dagg LLP | | 2020 |
| Daismil Services Limited | Wholesale & retail | 2026 |
| Dandelion Collective Dance CIC | Education | 2026 |
| Daniel LAY Event Services Ltd | Other services | 2019 |
| Daniel Olaru Planning Ltd | Construction | 2025 |
| Danielsamuel Care Services Ltd | Health & social care | 2020 |
| Danirariz Childcare Services Ltd | Health & social care | 2023 |
| Danndeb Medical Services Ltd | Health & social care | 2021 |
| Danni Building Services Ltd | Construction | 2017 |
| Danson Prestige Car Wash and Valeting Limited | Wholesale & retail | 2019 |
| Danson Youth Trust | Education | 2001 |
| Dantar Global Services Ltd | Real estate | 2022 |
| Dapper Chaps Mens Formal Wear Ltd | Other services | 2016 |
| Darshan Kumar Ltd | Construction | 2025 |
| Data Insight Value Ltd | Professional & scientific | 2023 |
| Data Network Ltd | Information & communication | 2013 |
| Datakart Limited | Information & communication | 2018 |
| Dave Fowler Limited | Other services | 2017 |
| Davero Build Ltd | Construction | 2025 |
| David Holt Special Effects Limited | Information & communication | 2015 |
| Davidson ECM Limited | Wholesale & retail | 2008 |
| Davidson George Ltd | Real estate | 2021 |
| Davis & Weedon Property Maintenance Ltd | Other services | 2021 |
| Dawn & Dusk Magic Studio Ltd | Manufacturing | 2024 |
| Dawn Distributions Ltd | Wholesale & retail | 2025 |
| Dawson-Asaam Systems Limited | Information & communication | 2016 |
| Dazzle Dime Corporation Ltd | Wholesale & retail | 2024 |
| DD Electrical Services Ltd | Energy | 2015 |
| DDL Fire Protection Ltd | Construction | 2025 |
| Ddms Tech Limited | Information & communication | 2019 |
| DE Centre Ltd | Health & social care | 2003 |
| Decennium Property Limited | Real estate | 2019 |
| Decobuildingpaint Ltd | Construction | 2021 |
| Deeluxehealth Limited | Health & social care | 2025 |
| Deepebar Properties Limited | Real estate | 1963 |
| Defender Properties Ltd | Real estate | 2017 |
| Delang Consultants Ltd | Wholesale & retail | 2018 |
| Delia Construction Ltd | Construction | 2016 |
| Delta Links Services Limited | Real estate | 2022 |
| Delta Properties Bexley Limited | Real estate | 2019 |
| Delta Security & Logistics Limited | Administrative & support | 2020 |
| Deluxhome Ltd | Wholesale & retail | 2020 |
| Dembar (Holdings) Limited | Real estate | 1963 |
| Demirdag Bexleyheath Limited | Other services | 2013 |
| Denbigh Home & Garden Furniture Limited | Wholesale & retail | 2024 |
| Denise Thompson (Designer Florist) Limited | Wholesale & retail | 2005 |
| Denpoint Secretarial Limited | Professional & scientific | 1961 |
| Densa Properties Ltd | Real estate | 2025 |
| DEO Volenti Ltd | Wholesale & retail | 2024 |
| Desed Ltd | Hospitality | 2016 |
| Design & Draughting Services Limited | Professional & scientific | 1999 |
| Devlin Reid Properties Limited | Real estate | 2015 |
| Devrel Limited | Professional & scientific | 2022 |
| DG Investments Holding Limited | Construction | 2018 |
| DGJ Tech Ltd | Manufacturing | 2024 |
| DH Consultancy Ltd | Construction | 2020 |
| DH Installations Ltd | Information & communication | 2025 |
| Dhadda Homes Ltd | Real estate | 2018 |
| Dhanshiv Houses Ltd | Real estate | 2022 |
| Dheeran Premier Ltd | Wholesale & retail | 2025 |
| Dhillon Distribution Ltd | Transport & logistics | 2025 |
| Dhinsa Transport Services Ltd | Transport & logistics | 2019 |
| Diamond Brite Services Limited | Construction | 2004 |
| Dibase Limited | Information & communication | 1994 |
| Digital Angel Radio Communications Limited | Information & communication | 2012 |
| Digital Political Ltd | Professional & scientific | 2025 |
| Digitalforensic UK Ltd | Information & communication | 2024 |
| Dinar Properties Limited | Real estate | 2025 |
| Dinarcompanyco Ltd | Wholesale & retail | 2025 |
| Disclosable Limited | Information & communication | 2026 |
| Discover Welling CIC | Other services | 2024 |
| Disha Properties Limited | Real estate | 2021 |
| Distinct Competitions Ltd | Wholesale & retail | 2023 |
| Distinct Resin Ltd | Administrative & support | 2025 |
| Diverse Action Group Limited | Construction | 2017 |
| DK Prestige Construction Ltd | Construction | 2025 |
| DK Property Enterprises Ltd | Real estate | 2019 |
| DL Consultancy Ltd | Construction | 2025 |
| DLE Solutions Limited | Construction | 2025 |
| DMH Sun Consulting Limited | Information & communication | 2011 |
| DMR Building Services Limited | Construction | 2011 |
| DMR Homes (SE) Limited | Construction | 2023 |
| DNA Tech IT Solutions Ltd | Information & communication | 2018 |
| DNT Logistics Limited | Transport & logistics | 2012 |
| DO Catering Ltd | Hospitality | 2025 |
| DO Transport Management Limited | Transport & logistics | 2016 |
| Dobby Limited | Construction | 2025 |
| Dobstel Limited | Real estate | 2025 |
| Doctors of Business Limited | Professional & scientific | 2025 |