| D R Autos (Bishops Stortford) Ltd | Wholesale & retail | 2014 |
| D&A Union Ltd | Construction | 2020 |
| D&B Gent Properties Ltd Ltd | Real estate | 2017 |
| D&D Building and Maintenance Ltd | Construction | 2021 |
| D&S Trans Logistics Ltd | Transport & logistics | 2020 |
| D.C. Butler Motor Cycles Limited | Wholesale & retail | 2002 |
| D.I.G.B. Limited | Financial services | 2001 |
| DADDYSNEAK3R Limited | Wholesale & retail | 2023 |
| Dade Construction Ltd | Construction | 2018 |
| DAF Investments Ltd | Real estate | 2021 |
| Daisylion Ltd | Real estate | 2026 |
| Dalegold Investments Limited | Real estate | 2009 |
| Dalias Admin Limited | Administrative & support | 2017 |
| Dame Papers Ltd | Professional & scientific | 2018 |
| DAN Matthews Photography Ltd | Professional & scientific | 2013 |
| Dan-Market Development Company Unlimited | Professional & scientific | 1988 |
| Danad Design Limited | Information & communication | 2014 |
| Dance Property Ltd | Extraterritorial | 2020 |
| Dancingbugs Limited | Education | 2022 |
| Danflord Limited | Health & social care | 2025 |
| Danic Properties Ltd | Real estate | 2024 |
| Daniel Davies Design and Build Ltd | Construction | 2025 |
| Daniel James White Ltd | Information & communication | 2021 |
| Dantasz Academy Ltd | Information & communication | 2025 |
| Dantech (Electrical) Limited | Construction | 2003 |
| Dashli Limited | Hospitality | 2025 |
| Data & Stock Solutions Limited | Administrative & support | 2012 |
| Data Energy Management Services Limited | Administrative & support | 1991 |
| Datacomunique Limited | Manufacturing | 2006 |
| Datagence Limited | Information & communication | 2025 |
| Datagene Limited | Information & communication | 2018 |
| Dateland Properties Limited | Real estate | 2002 |
| Davis Gardner Holdings Ltd. | Real estate | 2019 |
| Davjeronn Limited | Health & social care | 2023 |
| Dawn's Gardens Limited | Hospitality | 2019 |
| Day 2 Day Interiors Limited | Construction | 2009 |
| DB CAD Limited | Information & communication | 2012 |
| DB Finishes Ltd | Construction | 2014 |
| DBS Consultants Limited | Information & communication | 2016 |
| Dbse Ltd | Transport & logistics | 2026 |
| DC Alarm Systems Ltd | Other services | 2026 |
| Dcap Limited | Financial services | 2025 |
| Dcli 1944 Limited | Professional & scientific | 2020 |
| DE Rosa Music Limited | Wholesale & retail | 2013 |
| Deaconvale Ltd. | Professional & scientific | 2011 |
| Deben Investments Holdings Limited | Financial services | 2017 |
| Decon Medical Ltd | Wholesale & retail | 2014 |
| Decorative Edge Ltd | Construction | 2024 |
| Dedalo Global Advisors Ltd | Professional & scientific | 2018 |
| DEE Therapy Ltd | Health & social care | 2025 |
| Deediha Company Ltd | Health & social care | 2024 |
| Deeg Holdings Ltd | Real estate | 2025 |
| DEK Electrical Services Ltd | Construction | 2025 |
| Delarge Ltd | Professional & scientific | 2013 |
| Delta International Trading Limited | Wholesale & retail | 2018 |
| Deltech Property Services Limited | Real estate | 2022 |
| Deluvina Limited | Real estate | 2019 |
| Deminas Consults Ltd | Professional & scientific | 2023 |
| Denim Connect Ltd | Wholesale & retail | 2026 |
| Deniz Mehmet Cognitive Hypnotherapy Ltd | Health & social care | 2019 |
| Derek Holmes Funeral Services Limited | Extraterritorial | 2009 |
| Derrymore Ltd | Professional & scientific | 2023 |
| Desalis Hotel Ltd | Hospitality | 2025 |
| Design Chambers Limited | Professional & scientific | 2016 |
| Design Consultancy Building Services Limited | Construction | 2018 |
| Design Eyewear Group Limited | Wholesale & retail | 2006 |
| Design Requisite Ltd | Information & communication | 2018 |
| Design Supply Limited | Other services | 1991 |
| Design Supply Solutions Limited | Other services | 2009 |
| Deskmill Limited | Hospitality | 1993 |
| Detail Circuit Ltd | Administrative & support | 2025 |
| Devanny Bespoke Ltd | Construction | 2026 |
| Develop-It Software Ltd | Information & communication | 2018 |
| Devisio Limited | Administrative & support | 2013 |
| Devstackmarket Ltd | Information & communication | 2025 |
| DEW Valley Foods UK Limited | Wholesale & retail | 1997 |
| DG Digital Consulting Limited | Information & communication | 2025 |
| DG Trading Consultants Ltd | Professional & scientific | 2014 |
| Dgre Ltd | Real estate | 2025 |
| Dgtalrt Ltd | Wholesale & retail | 2023 |
| Dgzi Ltd | Wholesale & retail | 2012 |
| DH Stortford Ltd | Administrative & support | 2024 |
| Dharma Films Limited | Information & communication | 2012 |
| DHH Consultants Ltd | Professional & scientific | 2022 |
| Dhila Foundation Limited | Health & social care | 2021 |
| Diafora Enterprises Limited | Hospitality | 2014 |
| Diamond Cleaning (MR) Limited | Administrative & support | 2019 |
| Diamond Transport Stansted Ltd | Transport & logistics | 2022 |
| Diamond Vehicles Stansted Ltd | Wholesale & retail | 2021 |
| Diego Services Ltd | Construction | 2015 |
| Diet Consultancy Ltd | Health & social care | 2007 |
| Digi Shack Ltd | Information & communication | 2022 |
| Digibooks Publishing Ltd | Wholesale & retail | 2019 |
| Digiclear Holdings Limited | Professional & scientific | 2019 |
| Digital Design Consultancy Limited | Information & communication | 2021 |
| Digital Media Managed Limited | Professional & scientific | 2014 |
| Dijoma Ltd | Wholesale & retail | 2023 |
| Dime Holdings Ltd. | Wholesale & retail | 2020 |
| Dipmos Limited | Professional & scientific | 2022 |
| Directworksurfaces Ltd | Manufacturing | 2021 |