| Datel Ltd | Other services | 2026 |
| David Bentley Promotions Limited | Professional & scientific | 2006 |
| DAVIDHOUSE2010 Limited | Financial services | 2010 |
| Davidkconsulting Ltd. | Information & communication | 2012 |
| Davies Group Essex Ltd | Professional & scientific | 2025 |
| Davies Payroll Ltd | Professional & scientific | 2025 |
| Davies Property Rentals Ltd | Real estate | 2021 |
| Davos Property Ltd | Real estate | 2025 |
| DAW Consultancy Services Ltd | Real estate | 2015 |
| Day 2 Day Environmental Services Ltd | Administrative & support | 2018 |
| Day 2 Day Pest Control Ltd | Administrative & support | 2022 |
| DB Construction & Hvac Limited | Construction | 2025 |
| Decimal Place Property Limited | Construction | 2017 |
| Deltamead Limited | Other services | 2025 |
| Denway Solutions Limited | Information & communication | 2013 |
| Deria Group Ltd | Financial services | 2024 |
| Dermis Aesthetics Ltd | Other services | 2026 |
| Design Studio 10 Ltd | Professional & scientific | 2021 |
| Design Workouts Limited | Arts & recreation | 2015 |
| Devine Pharmacy Ltd | Wholesale & retail | 2019 |
| Devoted to Travel Limited | Administrative & support | 2012 |
| DG Law Consultant Limited | Professional & scientific | 2020 |
| Dialto Limited | Information & communication | 2002 |
| Dileas Capital Management Limited | Extraterritorial | 2018 |
| Direct Site Supplies Limited | Wholesale & retail | 2008 |
| Discovery People Ltd | Administrative & support | 2020 |
| DJT Media Ltd | Information & communication | 2014 |
| DKR Engineering Limited | Construction | 2022 |
| DM Delights Events Limited | Hospitality | 2025 |
| Dmpr Online Limited | Information & communication | 2016 |
| DMS Contracts Ltd | Construction | 2022 |
| Dobbie & Co Properties Ltd | Real estate | 2022 |
| Doctor Domestic Plus Limited | Administrative & support | 2018 |
| Dominion Medical Services Limited | Health & social care | 2011 |
| Dominion Property & Management Company Ltd | Real estate | 2018 |
| Dot's Tots Day Nursery Limited | Health & social care | 2020 |
| Dotshoeuk Ltd | Wholesale & retail | 2017 |
| Dottie Monaghan Limited | Other services | 2014 |
| Douchetree Limited | | 1982 |
| Dover Property Holdings 2 Limited | Transport & logistics | 2005 |
| Dover Property Holdings Limited | Real estate | 2014 |
| DPM Digital Health Consultancy Ltd | Information & communication | 2022 |
| DR Brennan Psychological Services Ltd | Health & social care | 2025 |
| DR MED Clinic Ltd | Health & social care | 2026 |
| Dream Big Ltd | Extraterritorial | 2018 |
| Dreamers Entertainment Ltd | Administrative & support | 2022 |
| DSL Highway Services Ltd | Construction | 2021 |
| DST Networks Limited | Construction | 2018 |
| DT Ventures Limited | Real estate | 2017 |
| Dtech Site Services Ltd | Construction | 2016 |
| DTP Flooring Ltd | Construction | 2024 |
| Dubar Consulting Ltd | Administrative & support | 2019 |
| Dubar Property Ltd | Real estate | 2025 |
| Ductwork Essex Limited | Construction | 2025 |
| Dunne Print Services Limited | Manufacturing | 2007 |
| Dunton Scooters Ltd | Wholesale & retail | 2020 |
| Durcan Contracting Ltd | Construction | 2023 |
| Dutton Scaffolding Services Limited | Construction | 2014 |
| DW Roofing Ltd | Construction | 2017 |
| E & B Gents Barbers Ltd | Other services | 2023 |
| E J B Financial Solutions Ltd | Financial services | 2022 |
| E L T Enterprises Ltd | Administrative & support | 2024 |
| E&P Ventures Ltd | Real estate | 2026 |
| E.M Express Delivery Ltd | Transport & logistics | 2021 |
| E.R.E.S. Holdings Limited | Professional & scientific | 1995 |
| E.R.E.S. Properties Limited | Real estate | 1995 |
| Eagle Builders 4U Ltd | Construction | 2021 |
| Eagle Builders Properties Limited | Real estate | 2025 |
| East Side Tree Care Limited | Administrative & support | 2021 |
| Easy Teachings (Essex) Limited | Education | 2018 |
| Ebere Udeariry Ltd | Health & social care | 2012 |
| Ebsworth Brickwork Services Limited | Administrative & support | 1998 |
| Echoside Limited | | 1983 |
| Eco Contracting Ltd | Construction | 2022 |
| Economics and Markets Limited | Professional & scientific | 2017 |
| Eden DRY Cleaners Ltd | Other services | 2019 |
| Edge-Ucate Ltd | Professional & scientific | 2021 |
| Edifice Developments Ltd | Construction | 2013 |
| Edifice&Co Ltd | Construction | 2019 |
| Edmund Services Limited | Other services | 1984 |
| Efiar Properties Limited | Real estate | 2025 |
| Efret Limited | Transport & logistics | 2005 |
| EG Studio Design Ltd | Professional & scientific | 2018 |
| EH Online (UK) Ltd | Wholesale & retail | 2021 |
| EHA Consultancy Limited | Professional & scientific | 2022 |
| Eido Business Support Services Ltd | Professional & scientific | 2023 |
| EJB Holdings Group Limited | Financial services | 2025 |
| EJB Property Group Limited | Real estate | 2025 |
| Ejeca Ltd | Information & communication | 2014 |
| EK Contracts Ltd | Construction | 2026 |
| El-Pee Ltd | Other services | 2020 |
| Elbi Lifts Limited | Professional & scientific | 2020 |
| Electric Sheep Technologies Ltd | Information & communication | 2018 |
| Electrical Excellence Limited | Construction | 2014 |
| Electrical Excellence Services Limited | Construction | 2016 |
| Elegant Mind Ltd | Professional & scientific | 2020 |
| Elehbc Ltd | Administrative & support | 2025 |
| ELEVA8 Limited | Professional & scientific | 2022 |
| Elevate M&E Ltd | Construction | 2021 |
| Elevatecarelife Limited | Health & social care | 2026 |