| Dqube Limited | Information & communication | 2016 |
| DR Hunt Psychology Ltd | Health & social care | 2023 |
| DR Training Limited | Professional & scientific | 2015 |
| Draft Design Build Limited | Information & communication | 2002 |
| Dragon Bench Limited | Manufacturing | 2012 |
| Drainage Connection Limited | Construction | 2008 |
| Drake Court Management (Reading) Limited | Households | 1976 |
| Dream Talent Connections Limited | Other services | 2024 |
| Drive Sentry Limited | Administrative & support | 2015 |
| Driveaxis Ltd | Professional & scientific | 2026 |
| Driveline Paving Services Ltd | Construction | 2023 |
| Drivewaze Ltd | Wholesale & retail | 2025 |
| DRR Enterprises Ltd | Real estate | 2017 |
| Drty Drinks Ltd | Wholesale & retail | 2018 |
| Drummond Court (Ascot) Management Company Limited | Real estate | 2005 |
| Drvr Limited | Construction | 2026 |
| Dryserve Ltd | Energy | 2013 |
| Dskr Properties Ltd | Real estate | 2016 |
| DTA Ecology Ltd | Professional & scientific | 2015 |
| DTA Publications Limited | Information & communication | 2012 |
| Dtfe Ltd | Professional & scientific | 2024 |
| DTL Holdings Limited | Financial services | 1999 |
| DTS Services Limited | Construction | 2006 |
| Dubs Plumbing and Heating Ltd | Construction | 2024 |
| Ducimus Investments Ltd | Construction | 2021 |
| Dumro Transport Ltd | Transport & logistics | 2019 |
| Dunbar Property Services Ltd | Real estate | 2023 |
| Duncan-Lynch Precision Tools Limited | Manufacturing | 1961 |
| Duncz Enterprise Limited | Hospitality | 2017 |
| Dunn Creative Ltd | Information & communication | 2014 |
| Duoc Limited | Information & communication | 2013 |
| Durga Techsoft Limited | Information & communication | 2024 |
| Durham Neuro Assessment Hub Ltd | Health & social care | 2025 |
| Durkan Engineering Limited | Information & communication | 2014 |
| Dutch Taverns Ltd | Hospitality | 2024 |
| Duty Driver Limited | Transport & logistics | 2025 |
| DVM Construction Ltd | Construction | 2018 |
| DVT Support Ltd | Wholesale & retail | 2024 |
| DW Heating & Plumbing Ltd | Construction | 2021 |
| DWK Properties Limited | Real estate | 2020 |
| Dxgiso Ltd | Professional & scientific | 2020 |
| Dynamic Warm Mellow Ltd | Wholesale & retail | 2022 |
| Dynamics Consulting Associates Ltd | Information & communication | 2017 |
| Dynasty by Cyplo Limited | Real estate | 2021 |
| E Logistics Solutions Limited | Administrative & support | 2008 |
| E R Sound Consulting Limited | Administrative & support | 2011 |
| E. & C. Design Services Limited | Professional & scientific | 1986 |
| E. & P. Homes Limited | Real estate | 2006 |
| E.U Ansary Ltd | Wholesale & retail | 2019 |
| E3S Education Limited | Education | 2025 |
| E4C Ltd | Construction | 2010 |
| EAI Fulfillment Limited | Transport & logistics | 2024 |
| EAM Care Group Limited | Administrative & support | 2012 |
| EAM Homecare Limited | Administrative & support | 2010 |
| EAR Cleansing Company Ltd | Health & social care | 2026 |
| Earley Care Company Limited | Health & social care | 2023 |
| Earth Grid Ltd | Construction | 2015 |
| Earth Sky Media Ltd | Information & communication | 2026 |
| East-West Bridge Centre Limited | Education | 2009 |
| Eastcote Place (Ascot) Residents Management Company Limited | Households | 2004 |
| Eastern OWL Limited | Professional & scientific | 2020 |
| Easthampstead Car Sales Limited | Wholesale & retail | 2020 |
| Eatdrinkparty Ltd | Hospitality | 2019 |
| EB Boiler Services Ltd | Construction | 2018 |
| EBP (Executive Business Partners) Limited | Professional & scientific | 2019 |
| EBP Financial Planning Limited | Financial services | 2012 |
| Ebpsource Limited | Information & communication | 2006 |
| Ec-Council Global Limited | Administrative & support | 2021 |
| Echo 2 Zero Limited | Administrative & support | 2009 |
| Eclectiq Solutions Ltd | Professional & scientific | 2017 |
| Eclipse Property Maintenance (Wokingham) Limited | Extraterritorial | 2013 |
| Eclipse Tiles Limited | Wholesale & retail | 2007 |
| Ecocentric Energy UK Limited | Information & communication | 2017 |
| Ecomatt Ltd | Construction | 2024 |
| Edacto Limited | Professional & scientific | 2016 |
| Eddie Plumbing Services Limited | Construction | 2018 |
| Eden Executive Cars Ltd | Transport & logistics | 2024 |
| Eden Lounge Limited | Wholesale & retail | 2013 |
| Eden Moonshine Limited | Wholesale & retail | 2025 |
| Edesia Catering Limited | Hospitality | 2016 |
| Edessa Trading Ltd | Wholesale & retail | 2020 |
| Edge Electricals & Solar Limited | Construction | 2023 |
| Edge Support Training Ltd | Administrative & support | 2023 |
| Edgewood Construction Limited | Construction | 2006 |
| Edubeez Ltd | Wholesale & retail | 2021 |
| Edvance Recruitment Ltd | Education | 2025 |
| Edytec Engineering Limited | Manufacturing | 2019 |
| EE AIO Limited | Real estate | 2023 |
| Eeshak Limited | Financial services | 2026 |
| Efkon Incorporation Limited | Real estate | 2021 |
| Egantt Limited | Professional & scientific | 2023 |
| Eggplant Bidco Limited | Professional & scientific | 2015 |
| Eggplant Group Limited | Professional & scientific | 2008 |
| Eggplant Limited | Information & communication | 2008 |
| Eggplant Live Limited | Information & communication | 2000 |
| Eggplant Midco Limited | Financial services | 2015 |
| Eggplant Topco Limited | Financial services | 2015 |
| EH9 Consulting Limited | Professional & scientific | 2018 |
| Ehealth RX Network Ltd | Information & communication | 2025 |
| Ehealth Solutions Limited | Information & communication | 2020 |