| Devcon Properties Limited | Real estate | 2021 |
| Devecs Services Limited | Other services | 2015 |
| Development and Testing Resource Limited | Professional & scientific | 2007 |
| Development Delivery International Limited | Professional & scientific | 1996 |
| Development Land Services Limited | Administrative & support | 2008 |
| Devex Ltd | Information & communication | 2025 |
| Devine Direct Labour Ltd | Construction | 2012 |
| Devine Holdings Group Ltd | Financial services | 2024 |
| Devine Property Management Holdings Limited | Real estate | 2025 |
| Devish Properties Limited | Real estate | 2020 |
| Devlin Hospitality Services Limited | Hospitality | 2020 |
| Devlin Housing Consultants Limited | Other services | 2017 |
| DEVON7T4 Design Limited | Professional & scientific | 2012 |
| Devonshire Aesthetics Limited | Health & social care | 2018 |
| Dewlap Studio Ltd | Professional & scientific | 2024 |
| Dexter Group of Companies Limited | Financial services | 2017 |
| DFM Design Ltd | Construction | 2023 |
| Dfoxx Consulting Ltd | Professional & scientific | 2018 |
| DG Autos (Aylesford) Limited | Other services | 2016 |
| DG Road Logistics Ltd | Transport & logistics | 2026 |
| DG Solutions (Kent) Limited | Construction | 2012 |
| Dgbs Trading Limited | Administrative & support | 2013 |
| DGF Accountants Limited | Professional & scientific | 2013 |
| DGN Art Limited | Manufacturing | 2026 |
| DGN Installations Ltd | Construction | 2020 |
| DGS Facility Management Ltd | Administrative & support | 2025 |
| DH Asphalt Supervision Ltd | Construction | 2024 |
| DH Structural Engineering Limited | Professional & scientific | 2008 |
| DH Timber Ltd | Manufacturing | 2024 |
| DHA Environment Ltd | Professional & scientific | 2011 |
| DHA Planning Group Holdings Limited | Extraterritorial | 2023 |
| DHA Planning Limited | Professional & scientific | 1992 |
| DHA Property Consultants Limited | Professional & scientific | 2012 |
| DHA Transport Ltd | Professional & scientific | 2009 |
| DHA Urban Design Ltd | Professional & scientific | 2011 |
| Dhabitat Design Center Limited | Construction | 2025 |
| Dhan Services Limited | Transport & logistics | 2019 |
| Dhaulagiri Limited | Wholesale & retail | 2010 |
| Dhcr Electrical Contractors Ltd | Construction | 2025 |
| DHV Construction Ltd | Construction | 2021 |
| Dhyani Care Limited | Health & social care | 2017 |
| DI Developments INT Ltd | Construction | 2018 |
| DI Group Ltd | Financial services | 2018 |
| DI Marco Brothers (Maidstone) Limited | Real estate | 1956 |
| DI Real Estate Ltd | Real estate | 2018 |
| Di-Stil (Consulting) Ltd | Professional & scientific | 2023 |
| Diadem Health Limited | Health & social care | 2023 |
| Diadem Property Hub Limited | Real estate | 2025 |
| Diai Care Limited | Public administration | 2020 |
| Diamond Aesthetics Clinic Limited | Other services | 2021 |
| Diamond Coast Ltd | Wholesale & retail | 2020 |
| Diamond D Ltd | Administrative & support | 2022 |
| Diamond Edge Drilling Limited | Construction | 1973 |
| Diamond Photofoil Ltd | Manufacturing | 1971 |
| Diamond West Limited | Extraterritorial | 2017 |
| Diamondbright Limited | Professional & scientific | 2002 |
| Diamondbrite Automotive Limited | Wholesale & retail | 2001 |
| Diamondbrite Limited | Professional & scientific | 2002 |
| Diamondswift Ltd | Wholesale & retail | 2023 |
| Didi Transport Ltd | Transport & logistics | 2025 |
| Didistroy Ltd | Construction | 2025 |
| Diegan Production Ltd | Information & communication | 2021 |
| Dielli Ltd | Other services | 2024 |
| Dife Ltd | Wholesale & retail | 2020 |
| Diforti Ltd | Health & social care | 2019 |
| Digital Artisan Editions Ltd | Information & communication | 2023 |
| Digital Click Media Ltd | Information & communication | 2016 |
| Digital Desires Ltd | Wholesale & retail | 2020 |
| Digital Edge Media Ltd | Information & communication | 2014 |
| Digital Fibre Connections Ltd | Other services | 2023 |
| Digital Pipeline | Information & communication | 2006 |
| Digital Pipeline Computers | Information & communication | 2001 |
| Digital Pipeline Europe Ltd | Information & communication | 2019 |
| Digital Pipeline IT Ltd | Information & communication | 2020 |
| Digital Service Management Limited | Administrative & support | 2018 |
| Digitaldice Ltd | Information & communication | 2025 |
| Diligence Property Services Ltd | Construction | 2013 |
| Dillywood Interiors Ltd | Construction | 2022 |
| Dimcher Ltd | Transport & logistics | 2022 |
| Dimi 25 Ltd | Transport & logistics | 2025 |
| Dimitar Angelov Ltd | Transport & logistics | 2019 |
| Dinamic Construction Ltd | Construction | 2019 |
| Dinamic Services Ltd | Transport & logistics | 2017 |
| Dine Thyme Limited | Manufacturing | 2012 |
| Dineosaur Ltd | Wholesale & retail | 2020 |
| DIO Elite Ltd | Arts & recreation | 2023 |
| Diogo Hub Ltd | Manufacturing | 2026 |
| Diphex Solutions Limited | Wholesale & retail | 2021 |
| Diplomat Recreational Vehicles Limited | Other services | 2010 |
| Dipster Consultancy Ltd | Professional & scientific | 2022 |
| Direct Build Limited | Construction | 2015 |
| Direct Home & Garden Ltd | Administrative & support | 2017 |
| Direct Surfacing Solutions Ltd | Construction | 2022 |
| Direct Tool Sales Ltd | Wholesale & retail | 1999 |
| Direct-Tec Group Limited | Professional & scientific | 2008 |
| Direct-Tec UK Limited | Administrative & support | 2004 |
| Directors Hair & Beauty Studio Limited | Other services | 2003 |
| Dirtee Stank Recording Limited | Information & communication | 2005 |
| Disability Audit Services Ltd. | Real estate | 1995 |
| Discount Electrical Centre (UK) Limited | Construction | 2009 |