| D & D Couture Ltd | Other services | 2012 |
| D & D Professional Services Ltd | Professional & scientific | 2025 |
| D & G Constructions (London) Ltd | Construction | 2024 |
| D & G Professional Cleaning Services Ltd | Administrative & support | 2026 |
| D & J Autos UK Ltd | Wholesale & retail | 2006 |
| D & S Titu Services Ltd | Transport & logistics | 2015 |
| D a R UK Services Ltd | Transport & logistics | 2019 |
| D D Homes Property's Ltd | Real estate | 2020 |
| D G a Enterprise Ltd | Construction | 2026 |
| D Garland Consulting Ltd | Health & social care | 2023 |
| D H Property Ventures Ltd | Real estate | 2024 |
| D J Tippers & Grab Hire Limited | Water & waste | 2013 |
| D Kosa Ltd | Construction | 2020 |
| D M Miron Ltd | Construction | 2017 |
| D Property Developer Limited | Real estate | 2024 |
| D TEK Services of UK Ltd | Information & communication | 2026 |
| D&A Facade Cladding Ltd | Construction | 2023 |
| D&A&R Transport Ltd | Transport & logistics | 2018 |
| D&B Projects Ltd | Construction | 2026 |
| D&D Care Services Ltd | Health & social care | 2026 |
| D&D Hill Cafe Ltd | Hospitality | 2022 |
| D&D Instalation Ltd | Construction | 2021 |
| D&D Roofing Services Ltd | Construction | 2025 |
| D&E Cleaning Experts Ltd | Administrative & support | 2021 |
| D&E Residential Ltd | Real estate | 2017 |
| D&G Lider Ltd | Construction | 2023 |
| D&I Clean Limited | Administrative & support | 2019 |
| D&K Drive Ltd | Transport & logistics | 2019 |
| D&M Removals Ltd | Transport & logistics | 2025 |
| D&Na Delivery Ltd | Transport & logistics | 2025 |
| D&O Cleaning Limited | Administrative & support | 2025 |
| D&T Newton Ltd | Professional & scientific | 2023 |
| D&Y Drawling Ltd | Construction | 2018 |
| D'Angel Trading Limited | Other services | 2013 |
| D-Sent Hair Salon Limited | Other services | 2026 |
| D.D Plumbing & Heating Limited | Construction | 2015 |
| D.Dop Ltd | Construction | 2018 |
| D.Parker Consultancy Ltd | Health & social care | 2026 |
| D.S.M City Construction Ltd | Construction | 2019 |
| D4 & Co Group Limited | Health & social care | 2026 |
| D90 Security Solutions Ltd | Administrative & support | 2017 |
| Da'Souzza Foods & Restaurant Services Ltd | Wholesale & retail | 2025 |
| Da-Silva and Associates Limited | Professional & scientific | 2003 |
| Daac Construction Limited | Construction | 2018 |
| Daakye Consult Limited | Administrative & support | 2021 |
| Dabbren Limited | Health & social care | 2016 |
| DAC Glazing Ltd | Construction | 2018 |
| DAC Invest Ltd | Real estate | 2016 |
| Dachi Ltd | Extraterritorial | 2022 |
| Daci Tile Ltd | Construction | 2015 |
| Dadyal Hair Salon Ltd | Other services | 2006 |
| DAF Builders Ltd | Construction | 2025 |
| DAF Ventures Limited | Wholesale & retail | 2024 |
| DAG (2014) Ltd | Hospitality | 2014 |
| Dagenham & Redbridge FC 2017 Limited | Arts & recreation | 2017 |
| Dagenham 1964 Limited | Extraterritorial | 2014 |
| Dagenham and Redbridge FC Community Trust | Other services | 2010 |
| Dagenham and Redbridge Football Club Limited | Arts & recreation | 2007 |
| Dagenham Auto Center Limited | Wholesale & retail | 2022 |
| Dagenham Car Wash Limited | Administrative & support | 2023 |
| Dagenham Cash & Carry Ltd | Wholesale & retail | 2014 |
| Dagenham Electric Plumbing and Tiles Ltd | Wholesale & retail | 2026 |
| Dagenham Enterprise Ltd | Wholesale & retail | 2014 |
| Dagenham Food Investments Ltd | Hospitality | 2022 |
| Dagenham Foods Ltd | Wholesale & retail | 2025 |
| Dagenham Freeholds Ltd | Real estate | 2025 |
| Dagenham Grill Ltd | Hospitality | 2025 |
| Dagenham HCW Ltd | Other services | 2019 |
| Dagenham Heathway Specsavers Limited | Wholesale & retail | 2000 |
| Dagenham Homes Ltd | Real estate | 2024 |
| Dagenham MOT & Services Ltd | Wholesale & retail | 2025 |
| Dagenham Music Academy Ltd | Education | 2015 |
| Dagenham Shop Fronts Ltd | Construction | 2021 |
| Dagenham Spice Ltd | Hospitality | 2020 |
| Dagenham Trade Halls Ltd | Hospitality | 2020 |
| Dagenham Tuition Centre Limited | Education | 2020 |
| Dagenham United FC Limited | Arts & recreation | 2016 |
| Dagenham Windows Ltd | Construction | 2023 |
| Dahab(Uk) Ltd | Wholesale & retail | 2018 |
| Dahiya Roofing Ltd | Construction | 2026 |
| Daily Dessert Co Ltd | Hospitality | 2025 |
| Daily Need by Barakah Ltd | Wholesale & retail | 2026 |
| Daily USE Ltd | Wholesale & retail | 2026 |
| Daimon Bessell T/A the Forklift Training Company Limited | Professional & scientific | 2012 |
| Daisy SAF Ltd | Health & social care | 2023 |
| Dala Builders Ltd | Construction | 2020 |
| Dalin Car Care Ltd | Wholesale & retail | 2017 |
| Dalin Cars Ltd | Wholesale & retail | 2019 |
| Dalin Tracking and Alignment Ltd | Wholesale & retail | 2007 |
| Dalin Tyres & Wheels Ltd | Wholesale & retail | 2008 |
| Dallas Global Limited | Health & social care | 2023 |
| Dallyla Ltd | Wholesale & retail | 2017 |
| Dalvo Ltd | Transport & logistics | 2017 |
| Dam&D Ltd | Manufacturing | 2026 |
| Daman Singh Limited | Wholesale & retail | 2022 |
| Dami International Limited | Administrative & support | 2017 |
| Damishi Healthcare Limited | Health & social care | 2021 |
| Damp Inspector Ltd | Financial services | 2023 |
| Damsel Holdings Ltd | Real estate | 2025 |
| Damy.Uk Ltd | Construction | 2023 |