| DELTA6 Ltd | Education | 2025 |
| Demon Inkorporation Limited | Arts & recreation | 2012 |
| Deniz Property Limited | Real estate | 2023 |
| Dentmarrt Ltd | Health & social care | 2021 |
| Denture Art Ltd | Manufacturing | 2023 |
| Derayo Ltd | Hospitality | 2022 |
| Derib Creations Limited | Other services | 2018 |
| Deshe.Shehu Ltd | Construction | 2015 |
| Design & Structure Ltd | Real estate | 2025 |
| Design Haus Fire Engineering Ltd | Professional & scientific | 2026 |
| Dessert Palace Ltd | Administrative & support | 2017 |
| Destination Delivery Limited | Transport & logistics | 2026 |
| Destinations by Design Limited | Administrative & support | 2023 |
| Destiny Pastries Services Limited | Manufacturing | 2025 |
| Devepic Ltd | Wholesale & retail | 2025 |
| Devoted Touch Ltd | Wholesale & retail | 2017 |
| Dexterity Builders Ltd | Construction | 2020 |
| Dghor Webx Ltd | Wholesale & retail | 2025 |
| Dhaliwal Dairy Limited | Wholesale & retail | 2008 |
| DHF Trade Ltd | Wholesale & retail | 2024 |
| Dhrush Bookkeeping Limited | Professional & scientific | 2023 |
| Diamond Property Finance Limited | Financial services | 2021 |
| Diana TDS Transport Limited | Transport & logistics | 2023 |
| DIG Consultancy Ltd | Information & communication | 2018 |
| Direct Tax Accountant Ltd | Professional & scientific | 2020 |
| Direct Windows Ltd | Construction | 2025 |
| Disetron Ltd | Wholesale & retail | 2025 |
| Diskworld.Com Limited | Wholesale & retail | 2004 |
| Diverse Creations Private Limited | Administrative & support | 2025 |
| Divinity Nails Limited | Other services | 2024 |
| DJ Dinn Ltd | Other services | 2023 |
| DJM Scaffolding & Rigging Limited | Construction | 2021 |
| DJT Sprinklers Ltd | Public administration | 2025 |
| DK London Properties Ltd | Real estate | 2021 |
| Dk-Build Ltd | Construction | 2017 |
| Dkleener Limited | Administrative & support | 2021 |
| DL Cleaners Ltd | Administrative & support | 2022 |
| Dm&Sh Property Ltd | Real estate | 2024 |
| DNY Global Marketing Limited | Other services | 2010 |
| Dochev Engineering Survey Ltd. | Construction | 2007 |
| Doctorgurung Limited | Health & social care | 2023 |
| Doghouse Inn Ltd | Hospitality | 2025 |
| Dolly's Food Ltd | Hospitality | 2014 |
| Domestic Appliance Supplies Ltd | Wholesale & retail | 2021 |
| Dondon Ltd | Hospitality | 2025 |
| Donhilda Ltd | Hospitality | 2022 |
| Donovans Waste Management Ltd | Water & waste | 2021 |
| Dormka Associates Ltd | Professional & scientific | 2022 |
| Dorsan Limited | Construction | 2026 |
| DR Applications Limited | Wholesale & retail | 2015 |
| DR Frames Ltd. | Construction | 2015 |
| DR JAG Aesthetics Ltd | Health & social care | 2025 |
| DR Shine Ltd | Administrative & support | 2025 |
| Dragon and Panda Ltd | Hospitality | 2024 |
| Dragon and Phoenix Club Limited | Education | 2023 |
| Drain Away & SON Limited | Construction | 2015 |
| Dreamer Cozy (UK) Limited | Real estate | 2024 |
| Dreamland Travel Ltd | Administrative & support | 2025 |
| Drinks Hubb UK Ltd | Other services | 2022 |
| Drive & Park Ltd | Administrative & support | 2021 |
| Drivy Ltd | Wholesale & retail | 2021 |
| Droveway Services Limited | Real estate | 2005 |
| DT818 Properties Ltd | Real estate | 2026 |
| DTD Solutions Ltd | Real estate | 2014 |
| DTD UK Solutions LLP | | 2024 |
| Duciz Ltd | Professional & scientific | 2018 |
| Duct & Air Ltd | Other services | 2018 |
| Dukkia Consulting Ltd | Information & communication | 2024 |
| Dumfido Ltd | Construction | 2014 |
| Durham Hits Entertainment Limited | Information & communication | 2025 |
| Duvet Wash Ltd | Other services | 2023 |
| DVH Limited | Professional & scientific | 2026 |
| Dvlp International Ltd | Construction | 2018 |
| DW - Mobile Mechanic Ltd | Wholesale & retail | 2025 |
| Dwelix Properties Solutions Limited | Real estate | 2026 |
| DXA Advice Ltd | Education | 2023 |
| DXA Recruitment Ltd | Education | 2024 |
| DXN Homes Ltd | Real estate | 2020 |
| DZ Plumbing and Electrical Ltd | Construction | 2017 |
| DZD Properties Limited | Real estate | 2024 |
| E D S Fire Ltd | Public administration | 2022 |
| E Square Solutions Limited | Information & communication | 2015 |
| E&E Vehicle Rentals Ltd | Administrative & support | 2024 |
| E&M Services Limited | Transport & logistics | 2018 |
| E&N Group Properties Limited | Real estate | 2017 |
| E&S Complete Building Services Ltd | Administrative & support | 2017 |
| Easy Babies Limited | Education | 2021 |
| Easyclean London Ltd | Wholesale & retail | 2024 |
| Easysteps Physiotherapy Limited | Health & social care | 2024 |
| Easzy Care Ltd | Health & social care | 2025 |
| Eblend Ltd | Professional & scientific | 2008 |
| EBSIIN-3N Limited | Information & communication | 2022 |
| EC Performing Arts Limited | Arts & recreation | 2019 |
| Ecatsue 2 Limited | Health & social care | 2022 |
| Eco Warm Services Ltd | Construction | 2018 |
| Ecohomebuild Ltd | Construction | 2019 |
| Ecos Consultancy Limited | Education | 2022 |
| Edbrit Limited | Education | 2019 |
| Edison Gardens Ltd | Agriculture & fishing | 2020 |
| Eduxlondon Limited | Transport & logistics | 2025 |