| DELGADO1 Integrity Ltd | Health & social care | 2021 |
| Delizone Ltd | Wholesale & retail | 2020 |
| Dell Renewables Limited | Energy | 2020 |
| Dellyworld Services Ltd | Information & communication | 2014 |
| Delray Autos (Essex) Limited | Wholesale & retail | 2012 |
| Delta Business School Limited | Education | 2020 |
| Delta Engines Ltd | Wholesale & retail | 2020 |
| Delta Haulage Ltd | Transport & logistics | 2014 |
| Delta Hoist & Scaffolding Ltd | Construction | 2025 |
| Delta Q a Limited | Professional & scientific | 2011 |
| Deluxe DRY Cleaners Ltd | Other services | 2014 |
| DEM General Services Limited | Construction | 2007 |
| Demilt Solutions Limited | Health & social care | 2018 |
| Demoforce Group Ltd | Construction | 2024 |
| Demoforce Plant Ltd | Construction | 2024 |
| Demolad Limited | Health & social care | 2025 |
| Demstell Consultancy Limited | Information & communication | 2014 |
| Demzfol Limited | Administrative & support | 2016 |
| Denature Limited | Administrative & support | 2019 |
| Dennis Safety Services Ltd | Administrative & support | 2018 |
| Dent Detective Ltd | Wholesale & retail | 2019 |
| Dentaflex Solutions Limited | Health & social care | 2023 |
| DEP Builders Limited | Administrative & support | 2021 |
| Deposit Return Limited | Extraterritorial | 2019 |
| Derek Sarko Limited | Professional & scientific | 2018 |
| Desanto Music Ltd | Information & communication | 2020 |
| Desbee Properties Limited | Real estate | 2023 |
| Deshi Brothers Store Limited | Wholesale & retail | 2025 |
| Design 2 Limited | Professional & scientific | 2011 |
| Design and Build Your Space Ltd | Construction | 2021 |
| Design Knowhow Limited | Professional & scientific | 2014 |
| Design Vision Interiors Fit OUT Ltd | Construction | 2022 |
| Design-Jr. Limited | Other services | 2015 |
| Designed Plaster Craft Ltd | Construction | 2018 |
| Designer Furniture Gallery Ltd | Wholesale & retail | 2019 |
| Desiree Design Studio Limited | Professional & scientific | 2021 |
| Dessert & Co. Grays Ltd | Hospitality | 2026 |
| Destiny Care Homes Ltd | Health & social care | 2024 |
| Devsankalp Limited | Wholesale & retail | 2018 |
| Dewencost Solutions Limited | Information & communication | 2007 |
| Dexteros Ltd | Wholesale & retail | 2022 |
| DF Care Services Ltd | Health & social care | 2016 |
| DF Drylining Ltd | Construction | 2021 |
| DF Investments Ltd | Real estate | 2025 |
| DFA Haulage Ltd | Transport & logistics | 2018 |
| DG Emergency Plumbing Ltd | Construction | 2017 |
| DG Pro Services Ltd | Construction | 2019 |
| Dgdg Glazing Ltd | Construction | 2016 |
| DGS Fire and Security Ltd | Administrative & support | 2018 |
| DGS Trans Limited | Transport & logistics | 2023 |
| Dgss Limited | Administrative & support | 2016 |
| Dhama Group House Ltd. | Professional & scientific | 2020 |
| Dhama Health Limited | Health & social care | 2022 |
| Dhama House Limited | Professional & scientific | 2019 |
| DHG Accountancy Ltd | Professional & scientific | 2023 |
| DI & SON Services Limited | Administrative & support | 2015 |
| Di-Tech Consultancy Ltd | Information & communication | 2019 |
| Diamond Carpentry Ltd | Construction | 2024 |
| Diamond Anchor Digital Limited | Professional & scientific | 2026 |
| Diamond Electrics Essex Ltd | Construction | 2016 |
| Diamond Enterprise & Solutions Ltd | Transport & logistics | 2025 |
| Diamond Glaze Ltd | Construction | 2014 |
| Diamond Look Nails & Eyelashes Ltd | Other services | 2018 |
| Diaphell Aesthetics Ltd | Health & social care | 2020 |
| Diggerweld Repairs Limited | Construction | 2022 |
| Diggines Ductwork Ltd | Construction | 2021 |
| Digiarc Ltd. | Administrative & support | 2023 |
| Digibit Ltd | Information & communication | 2025 |
| Digicart Solutions Ltd | Wholesale & retail | 2026 |
| Digital Chords Limited | Information & communication | 2022 |
| Digital New Venture Company Limited | Financial services | 2017 |
| Digital Trans Limited | Information & communication | 2020 |
| DILAN18 Ltd | Construction | 2019 |
| Dilany Ltd | Hospitality | 2021 |
| Diligent Fusion Ltd | Administrative & support | 2015 |
| Dimensional Solutions Ltd | Information & communication | 2016 |
| Ding Dong Buzz Ltd | Real estate | 2022 |
| Direct Assets Holdings Limited | Financial services | 2026 |
| Direct Compactor Services Limited | Professional & scientific | 2022 |
| Direct Electrical & Renewables Ltd | Construction | 2025 |
| Direct Properties (Essex) Ltd | Real estate | 2024 |
| Direct Screeding Ltd | Construction | 2016 |
| Dirty Pups Ltd | Construction | 2024 |
| Diva Dispatch Ltd | Transport & logistics | 2024 |
| Divas With Vision | Administrative & support | 2025 |
| Divashcreationz Ltd | Professional & scientific | 2025 |
| Divine Comfort Care Services Ltd | Health & social care | 2017 |
| Divine Investment-Plus Ltd | Construction | 2017 |
| Divine Investments & Care Services Limited | Health & social care | 2013 |
| Dizon and Santos Ltd | Real estate | 2021 |
| DJD Cornerstone Estates Limited | Real estate | 2026 |
| DJJ Properties Ltd | Real estate | 2023 |
| DJP Electrical Services Ltd | Construction | 2019 |
| DK Drilling Ltd | Construction | 2026 |
| Dk&Dk Clothing Ltd | Wholesale & retail | 2024 |
| DKP Enterprises Ltd | Wholesale & retail | 2014 |
| DL Civil & Utilities Ltd | Construction | 2026 |
| DL Clothing Ltd | Wholesale & retail | 2016 |
| Dlbuk Ltd | Information & communication | 2019 |
| Dlmd Construction Ltd | Construction | 2022 |