| DJR Roofing Ltd | Construction | 2021 |
| DKP Home Improvements Ltd | Construction | 2026 |
| DL Electrical Services Limited | Construction | 2008 |
| DLI Properties Ltd | Real estate | 2024 |
| DM Autobody Repairs Limited | Wholesale & retail | 2012 |
| DMC Accounting Ltd | Professional & scientific | 2025 |
| DMC Real Estates Ltd | Real estate | 2024 |
| DMG Trader Ltd | Construction | 2025 |
| DN Property Investments Ltd | Real estate | 2020 |
| Docndive Limited | Health & social care | 2013 |
| Doctor Jolly Ltd | Other services | 2020 |
| Doctor Plumber Services Ltd | Construction | 2018 |
| Dolce Ice Cream Limited | Hospitality | 2022 |
| Doll's Limited | Wholesale & retail | 2005 |
| DOLLS1 Limited | Wholesale & retail | 2025 |
| Dolmar Ltd | Real estate | 2026 |
| Dolphin Middle East Company UK Ltd | Manufacturing | 2025 |
| Dolphin Park and Ride Ltd | Transport & logistics | 2024 |
| Donald Cameron Facilities Management Limited | Professional & scientific | 1967 |
| Donchuks Ltd | Health & social care | 2022 |
| Donnington Facilities Ltd | Other services | 2018 |
| Dope Technology Services Ltd | Information & communication | 2016 |
| Doubletake Theatre Ltd | Arts & recreation | 2024 |
| Doughty Commissioning Ltd | Professional & scientific | 2008 |
| Dove Apartments Ltd | Real estate | 2019 |
| DR D Balan Ltd | Health & social care | 2025 |
| DR Heating Home Services Ltd | Construction | 2026 |
| DR I C Services Ltd | Health & social care | 2025 |
| DR John Villanueva Ltd | Health & social care | 2025 |
| DR Safiyah Ahsan Limited | Professional & scientific | 2014 |
| DR SFA Locums Limited | Health & social care | 2013 |
| DR. Aria Group Ltd | Health & social care | 2017 |
| DR. Gino Vissers Ltd | Health & social care | 2023 |
| DR. Lubna Rasheed Coaching Ltd | Professional & scientific | 2024 |
| Dragon Autoshield Ltd. | Wholesale & retail | 2017 |
| Dragon Palace Catering Ltd | Hospitality | 2014 |
| Dream Beginning Sweaters Co., Ltd | Administrative & support | 2019 |
| Dream House Properties Services Ltd | Real estate | 2025 |
| Dreamers Properties Ltd | Real estate | 2023 |
| Dreampostcode Limited | Real estate | 2018 |
| Drigh Ltd | Health & social care | 2019 |
| Dripbillion Limited | Manufacturing | 2025 |
| Drive Forst Services Ltd | Wholesale & retail | 2018 |
| Drmgk Ltd | Health & social care | 2025 |
| Drury Lane London Ltd | Hospitality | 2020 |
| DS UK Services Ltd | Construction | 2021 |
| DS World Ltd Ltd | Other services | 2014 |
| DSI Holdings Limited | Manufacturing | 2016 |
| DSI UK Limited | Manufacturing | 1996 |
| Dslr Photography Courses Limited | Education | 2012 |
| Dtda Solutions Ltd | Information & communication | 2018 |
| Dupak Packaging Ltd | Manufacturing | 2025 |
| Duplex Pipe Organ and Blower Company Ltd | Manufacturing | 2000 |
| Durgabhawani Limited | Real estate | 2025 |
| Durrani ALL Diesel Workshop Ltd | Wholesale & retail | 2025 |
| Duson Limited | Hospitality | 2025 |
| Dwarsh Limited | Construction | 2015 |
| DWD Trading Ltd | Transport & logistics | 2023 |
| Dwkm Enterprises Ltd | Health & social care | 2025 |
| DX MED Ltd | Information & communication | 2026 |
| DXB Incorporation Ltd | Information & communication | 2023 |
| Dykt Limited | Transport & logistics | 2024 |
| Dynamic Auto Services Ltd | Wholesale & retail | 2019 |
| Dynamic Renovations Limited | Construction | 2024 |
| Dynamics Property Services Ltd | Real estate | 2026 |
| Dynamics Real Estate Ltd | Real estate | 2016 |
| Dynamik Solutions Ltd | Information & communication | 2024 |
| DZ Landscaping Ltd | Administrative & support | 2025 |
| E & N General Contracting Company Ltd | Construction | 2024 |
| E at 7 Ltd | Information & communication | 2025 |
| E M Construct Ltd | Construction | 2018 |
| E Plus Barber Shop Ltd | Other services | 2021 |
| E X L Accountants and Tax Advisors Ltd | Professional & scientific | 2025 |
| E-Trimz Ltd | Other services | 2022 |
| E2M Innovations Ltd | Education | 2025 |
| E3 Business & Administrative Consulting Limited | Professional & scientific | 2024 |
| Eagf Ltd | Real estate | 2010 |
| Eagle Cars Limited | Transport & logistics | 2012 |
| Eagle Hills Global Ltd | Construction | 2019 |
| Eagle London Ltd | Transport & logistics | 2022 |
| Eagle Power Force Ltd | Wholesale & retail | 2025 |
| Earlsfield Autos Service Ltd | Wholesale & retail | 2019 |
| Early Years Active Ltd | Education | 2026 |
| Earth & I Naturals Limited | Manufacturing | 2025 |
| Earth Icon Ltd | Construction | 2021 |
| Easebank Ltd | Other services | 2005 |
| Eassy Cars Limited | Wholesale & retail | 2017 |
| East Gourmet Grill Limited | Hospitality | 2025 |
| East West Intl Ltd | Real estate | 2014 |
| Eastern Planet Ltd. | Construction | 2022 |
| Easy Joinery Ltd | Construction | 2022 |
| Easy Outlet Ltd | Administrative & support | 2016 |
| Easy Removals Ltd | Transport & logistics | 2012 |
| Easyroomletslondon Limited | Real estate | 2017 |
| EAT Rite Caribbean Cuisine Limited | Hospitality | 2015 |
| Ecmc Medical Ltd | Health & social care | 2025 |
| Eco Camwatch Ltd | Other services | 2023 |
| Eco Chimney Limited | Construction | 2013 |
| Eco Miles Cars Ltd | Transport & logistics | 2020 |
| Eco United Energy Limited | Construction | 2026 |