| Debut Salon Ltd | Other services | 2019 |
| Debut Training Academy Limited | Other services | 2010 |
| Declarx Limited | Transport & logistics | 2024 |
| DEE Enterprise Investments Limited | Administrative & support | 2025 |
| Deedmix Limited | Extraterritorial | 2009 |
| Deeon Limited | Financial services | 2020 |
| Deep Audio Ltd | Administrative & support | 2021 |
| Deerbank Developments Limited | Construction | 2021 |
| Deerbrand Secretaries Ltd | Administrative & support | 2005 |
| Dee’S Recovery’S Ltd | Transport & logistics | 2025 |
| DEM Waste Solutions Ltd | Water & waste | 2019 |
| Demco Demolition Ltd | Construction | 2018 |
| Denebank Precision Engineering (UK) Limited | Manufacturing | 1994 |
| Denebank Precision Engineering Holdings Limited | Financial services | 2024 |
| Dengie Construction Limited | Construction | 2014 |
| Dengie Properties Limited | Construction | 1983 |
| Denwar Ltd | Construction | 2017 |
| Dependaflow Limited | Water & waste | 2025 |
| Desborough Securities Limited | Real estate | 1959 |
| Deseo Limited | Other services | 2015 |
| Designer Bedrooms Ltd | Manufacturing | 2017 |
| Designs & Lines Ltd | Administrative & support | 2011 |
| Destination Navigators Limited | Professional & scientific | 2013 |
| DEV Catering Ltd | Hospitality | 2020 |
| Devyn Ltd | Construction | 2015 |
| DGW (Essex) Limited | Construction | 2008 |
| DHA Mechanical Limited | Construction | 2015 |
| Diamond Electrical & Renewables Ltd | Administrative & support | 2008 |
| Diaz Property Renovations Limited | Construction | 2016 |
| Diaz Renovations Limited | Construction | 2024 |
| Digital Milk Ltd | Administrative & support | 2017 |
| Digitval Limited | Information & communication | 2022 |
| Ding Security Limited | Information & communication | 2024 |
| Direct Construction and Tunnelling Supplies Limited | Wholesale & retail | 1992 |
| Direct Welding & Site Supplies Limited | Wholesale & retail | 2018 |
| Direct Welding Supplies Ltd | Extraterritorial | 2012 |
| Discounted Designer Limited | Wholesale & retail | 2025 |
| Display Services Limited | Manufacturing | 1994 |
| Distinct Building Services Ltd | Construction | 2016 |
| Divine and Precious Limited | Other services | 2016 |
| Divine Consulting Recruitment Limited | Administrative & support | 2016 |
| Divine UK Properties Ltd | Real estate | 2020 |
| Divyum Consulting Ltd | Professional & scientific | 2018 |
| Divyum Limited | Wholesale & retail | 2013 |
| Divyum Ventures Ltd | Wholesale & retail | 2018 |
| DJD Storage Limited | Real estate | 2022 |
| DJH Mechanical Services Limited | Construction | 2026 |
| Djol Ltd | Health & social care | 2022 |
| Djrl Consultancy Ltd | Information & communication | 2023 |
| DJS Fencing Ltd | Construction | 2015 |
| DM Finance & Consulting Ltd | Professional & scientific | 2024 |
| Dmarta Properties Limited | Real estate | 2021 |
| DMC Commissioning Services Ltd | Professional & scientific | 2018 |
| DMC Construction Specialists Limited | Construction | 2019 |
| DMC Tiling Limited | Construction | 2010 |
| DMS Project Management Services Limited | Construction | 2013 |
| DN Groundworks Ltd | Construction | 2019 |
| Dock Meat & Fish Trading Co Ltd | Hospitality | 2015 |
| Domain Name System 09 Ltd | Administrative & support | 2008 |
| Domestic Appliance Doctor Limited | Other services | 2003 |
| DON Cafe Ltd | Hospitality | 2025 |
| Donmini Movement Joints Limited | Manufacturing | 2023 |
| Doortek Limited | Wholesale & retail | 2004 |
| Dorwyn Home Improvements Limited | Construction | 2026 |
| Dorwyn Ltd | Wholesale & retail | 2018 |
| Dotcomblinds Limited | Wholesale & retail | 2016 |
| Double Glazing Installations Essex Ltd | Construction | 2021 |
| Double P Limited | Real estate | 2019 |
| Dove Gymnastics Club Ltd | Education | 2022 |
| Downlands Grooming Limited | Professional & scientific | 2013 |
| DP Cabling Ltd | Information & communication | 2024 |
| DP Easthope (Freelance Surveyor) Limited | Professional & scientific | 2005 |
| DPJ Fire and Security Limited | Construction | 2018 |
| DPJ Holdings Limited | Real estate | 2016 |
| DPJ Sprinklers Ltd | Construction | 2021 |
| DR Bolts Limited | Hospitality | 2021 |
| DR Solar Limited | Construction | 2008 |
| DR. O. a. Agbaje & Co Ltd | Administrative & support | 2012 |
| Dr.Tech Wickford Ltd | Wholesale & retail | 2026 |
| Drains 2 Mains Ltd | Water & waste | 2023 |
| Draughts Coordination Services Ltd | Transport & logistics | 2025 |
| Dready Original Ltd | Wholesale & retail | 2020 |
| Dream Vape Co Limited | Wholesale & retail | 2017 |
| Drgb Ltd | Health & social care | 2026 |
| Drivetint Ltd | Wholesale & retail | 2026 |
| Driving Test Cancellations Ltd | Information & communication | 2010 |
| DRO Enterprises Limited | Health & social care | 2021 |
| Drobe Technologies Ltd | Information & communication | 2025 |
| Dropstar Logistics Ltd | Transport & logistics | 2020 |
| Drtm Properties Ltd | Real estate | 2025 |
| Drummond Housing Limited | Real estate | 2016 |
| DS Revit Coordination Ltd | Construction | 2019 |
| DTH Render Ltd | Construction | 2025 |
| DTK Demolition Limited | Construction | 2026 |
| Dtmprops Ltd | Wholesale & retail | 2025 |
| DU Consulting Limited | Professional & scientific | 2022 |
| Dual Core Solutions Ltd | Construction | 2025 |
| Dual Vault Collectibles Ltd | Wholesale & retail | 2026 |
| DUB Custom Cars Limited | Other services | 2014 |
| Duck and Dragon Limited | Manufacturing | 2025 |