| D H M (Spares) Limited | Administrative & support | 2003 |
| D S Refurbs Limited | Wholesale & retail | 2019 |
| D T Plumbing Limited | Construction | 2002 |
| D&K Business & Safety Solutions Limited | Professional & scientific | 2015 |
| D&K Supplies Limited | Administrative & support | 2025 |
| D'Mosch Consulting Services Limited | Administrative & support | 2010 |
| D.B Clearances Ltd | Water & waste | 2021 |
| D.P Construction & Landscaping Limited | Construction | 2023 |
| D.T.P Decoration to Perfection Ltd | Construction | 2024 |
| DAF Sweeping Ltd | Construction | 2023 |
| DAK Consult Ltd | Information & communication | 2020 |
| Daniel Groves Design Limited | Professional & scientific | 2021 |
| Danlaw Properties Limited | Real estate | 2024 |
| Danson Boathouse Limited | Hospitality | 2021 |
| Danson Sports FC Limited | Arts & recreation | 2021 |
| Darcy Consulting Inc Limited | Information & communication | 2019 |
| Darenth Big Lake Ltd. | Arts & recreation | 2002 |
| Dark Side of the Boom Ltd | Information & communication | 2013 |
| Darren Andrews Landscaping Services Limited | Administrative & support | 2021 |
| Dasheg Limited | Professional & scientific | 2022 |
| Data Boffin Ltd | Financial services | 2021 |
| Dauzincourt Limited | Hospitality | 2003 |
| Davies CP Investments Ltd | Financial services | 2020 |
| Davies Personality Profile Limited | Information & communication | 2009 |
| Davina Newman Investments Limited | Real estate | 2025 |
| Davsam Global Care Ltd | Health & social care | 2018 |
| Dawn to Dusk Day Nursery (Swanley) Ltd | Education | 2001 |
| Dawson Drive Manco Limited | Households | 2020 |
| Day Property Group Holdings Ltd | Financial services | 2026 |
| Day Property Hub Ltd | Information & communication | 2026 |
| Day Property Projects Ltd | Construction | 2024 |
| Day Property Services Limited | Construction | 2022 |
| DAY2DAY Services Ltd | Transport & logistics | 2015 |
| Days Roofing Ltd | Construction | 2022 |
| DB Lifts Ltd | Professional & scientific | 2018 |
| DB Windows and Doors Limited | Construction | 2019 |
| DC Lift Pro Limited | Manufacturing | 2020 |
| DE Prolific Limited | Wholesale & retail | 2020 |
| Decent Homes Limited | Real estate | 2003 |
| Decorative Specialists Limited | Construction | 2014 |
| Decs Hall Limited | Professional & scientific | 2025 |
| Definitive Group Ltd | Construction | 2024 |
| Definitive Security Solutions Ltd | Administrative & support | 2011 |
| Deira Dental Ltd | Health & social care | 2021 |
| Delux Stays Ltd | Real estate | 2025 |
| Demal Group Ltd | Construction | 2021 |
| Demaria Investments Ltd | Real estate | 2025 |
| Demeter Trading & Co. Limited | Wholesale & retail | 2024 |
| Denmead Solutions Ltd | Professional & scientific | 2017 |
| Depaad Limited | Transport & logistics | 2019 |
| Derby Healthcare (Holdings) Limited | Administrative & support | 2003 |
| Derby Healthcare Nominee Limited | Financial services | 2003 |
| Derby Healthcare PLC | Construction | 2003 |
| Desert Dwellers Limited | Wholesale & retail | 2024 |
| Design Buddy Ltd | Professional & scientific | 2023 |
| Design Hi-Tech Ltd | Professional & scientific | 2008 |
| Design Roofing Ltd | Construction | 2020 |
| Detail the Shutter Co Ltd | Construction | 2018 |
| DEW & Jade Limited | Wholesale & retail | 2019 |
| DF London Limited | Professional & scientific | 2012 |
| DG Bennett & Co Limited | Administrative & support | 2025 |
| DG Tech Southeast Limited | Professional & scientific | 2020 |
| DH Home Improvments Ltd | Construction | 2020 |
| Diamond and Gold Ventures Limited | Wholesale & retail | 2015 |
| Digital BIM Ltd | Wholesale & retail | 2020 |
| Direct Interiors Design Limited | Professional & scientific | 2012 |
| Divine LEN Healthcare Ltd | Health & social care | 2022 |
| DJB Building Maintenance Services Ltd | Construction | 2026 |
| DK Cleaning Contractors Limited | Administrative & support | 2024 |
| DKM Brickwork Limited | Construction | 2020 |
| DM Electrotechnical Services Ltd | Construction | 2026 |
| DMM Developments Limited | Real estate | 2001 |
| DNC Nominees Limited | Financial services | 2015 |
| Dobri Trans Ltd | Transport & logistics | 2015 |
| Doccoms Global Limited | Information & communication | 2019 |
| DOCUMENT360 Limited | Information & communication | 2021 |
| Dog Park Management Limited | Administrative & support | 2024 |
| Dolcielola Limited | Hospitality | 2024 |
| Dolke Ltd | Professional & scientific | 2017 |
| Domestic Heating Maintenance (Spares) Limited | Wholesale & retail | 1980 |
| Domestic Heating Maintenance Limited | Administrative & support | 1980 |
| Dondo Ecom Ltd | Wholesale & retail | 2024 |
| Dorisi OT Limited | Health & social care | 2014 |
| DP & SP Limited | Health & social care | 2006 |
| DPB Property Limited | Real estate | 2005 |
| DPG Electrical Ltd | Construction | 2016 |
| DR N G Mikhaeel LLP | | 2011 |
| Draper Advisors Limited | Professional & scientific | 2026 |
| Drapeshott Firehouse (Colchester) Limited | Real estate | 2026 |
| Drapeshott Holdings Limited | Financial services | 2024 |
| Drapeshott Limited | Real estate | 2024 |
| Dray Associates Limited | Construction | 2010 |
| Drayton Finch Limited | Administrative & support | 2009 |
| Dream Cloud Properties Ltd | Real estate | 2024 |
| Drings Limited | Wholesale & retail | 2004 |
| Driscoll Direct Limited | Extraterritorial | 2007 |
| Driscoll Direct Properties Ltd | Real estate | 2025 |
| Drivers Path Ltd | Transport & logistics | 2024 |
| DS Bell Developments Ltd | Construction | 2017 |
| DS Lavender Limited | Construction | 2024 |