| Delta Forum LP | | 2018 |
| Delta Global Import/Export L.P. | | 2012 |
| Delta Global Industrial LP | | 2016 |
| Delta I.T. Services L.P. | | 2011 |
| Delta I.T. Support L.P. | | 2008 |
| Delta Intercity L.P. | | 2008 |
| Delta International Corporation L.P. | | 2008 |
| Delta International Group L.P. | | 2016 |
| Delta Investment Partnership L.P. | | 2010 |
| Delta Marlen UK Limited | Administrative & support | 2016 |
| Delta Overseas Services L.P. | | 2012 |
| Delta Production Services Ltd | Information & communication | 2023 |
| Delta Property Organisation L.P. | | 2010 |
| Delta System LP | | 2016 |
| Delta Technical Solutions L.P. | | 2012 |
| Delta Temperature Solutions Ltd | Construction | 2026 |
| Delta Therapy Ltd | Health & social care | 2021 |
| Delta Trade Worldwide L.P. | | 2011 |
| Delta Trinacria L.P. | | 2012 |
| Delta Uniform Ltd | Wholesale & retail | 2024 |
| Delta United LP | | 2015 |
| Deltaby Universal LP | | 2012 |
| Deltaeolas Limited | Administrative & support | 2025 |
| Deltafleet Limited | Transport & logistics | 1999 |
| Deltafleet Three Ltd. | Professional & scientific | 2000 |
| Deltahedge LP | | 2013 |
| Deltateam System LP | | 2013 |
| Deltaway Systems L.P. | | 2014 |
| Deltodon Ltd | Information & communication | 2020 |
| Delux Tanners Ltd | Other services | 2025 |
| Delux Worx Ltd | Construction | 2025 |
| Deluxe Alliance LP | | 2017 |
| Deluxe Play Agency LP | | 2025 |
| Deluxe Property Services Limited | Households | 2008 |
| Deluxe Trading Ltd | Wholesale & retail | 2015 |
| Deluxejet Limited | Transport & logistics | 2024 |
| Delvo Export LP | | 2014 |
| Delyr Ltd | Hospitality | 2026 |
| Deman Limited | Professional & scientific | 1981 |
| Deman Properties Ltd | Real estate | 2023 |
| Demarco Future Limited | Construction | 2019 |
| Demarco Moneymanagement Ltd | Financial services | 2013 |
| Dementia Discovery GP LP | | 2015 |
| Dementia Scotland Limited | Wholesale & retail | 2006 |
| Demers Group LP | | 2016 |
| Demersum Consult LP | | 2017 |
| Demeter Solutions LP | | 2016 |
| Demetra Group LP | | 2016 |
| Demifor LP | | 2014 |
| Demira Jewels PVT. Ltd | Manufacturing | 2023 |
| Demman LP | | 2012 |
| Demmeston Impex LP | | 2014 |
| Demmylee Global Services Ltd | Wholesale & retail | 2025 |
| Demoda Fashion LP | | 2018 |
| Demode Vintage Ltd | Wholesale & retail | 2025 |
| Demon Foods Limited | Hospitality | 2010 |
| Demon Snapper Productions Ltd | Information & communication | 2021 |
| Demosource L.P. | | 2010 |
| Dempeco Environmental Ltd | Water & waste | 2026 |
| Dempsey Bros. Ltd | Hospitality | 2018 |
| Dempsey Properties Limited | Real estate | 2023 |
| Dempsey Trading Ltd | Wholesale & retail | 2023 |
| Demtra Impex LP | | 2016 |
| Demtvord Sales LP | | 2015 |
| Demys Limited | Information & communication | 1999 |
| DEN Alliance Honding LP | | 2020 |
| DEN Gamle by LP | | 2016 |
| Denali Systems LP | | 2018 |
| Denbole Select L.P. | | 2009 |
| Dencar Universal LP | | 2015 |
| Denco Asset Management Ltd | Real estate | 2021 |
| Dene Guest House Ltd. | Hospitality | 2015 |
| Denend Ltd | Mining & quarrying | 2020 |
| Denfor Invest LP | | 2015 |
| Denfotex Research Limited | Manufacturing | 2011 |
| Denholm Associates Limited | Administrative & support | 2000 |
| Denholm Ltd | Administrative & support | 2026 |
| Denholm Talent Solutions Ltd | Administrative & support | 2026 |
| Denholm's Decorators Ltd | Construction | 2025 |
| Denia Global Trade LP | | 2012 |
| Deniotrade Project LP | | 2014 |
| Denison Danwell & Co | | 1993 |
| Deniz & Demir Ltd | Hospitality | 2014 |
| Deniz Supermarket Ltd | Wholesale & retail | 2016 |
| Denlin Services Ltd | Information & communication | 2025 |
| Denman Project LP | | 2015 |
| Denness Digital Ltd | Information & communication | 2025 |
| Denning Resources LP | | 2014 |
| Denny Incorporated Ltd | Real estate | 2022 |
| Denny Taxis Ltd. | Professional & scientific | 2004 |
| Denolton Trade LP | | 2015 |
| Denote IT Limited | Professional & scientific | 2013 |
| Denox Consulting LP | | 2011 |
| Dens Scottish Limited Partnership | | 2006 |
| Dental Depot Ltd | Health & social care | 2025 |
| Dental Express (Edinburgh) Ltd. | Health & social care | 2009 |
| Dental Express (UK) Ltd | Real estate | 2002 |
| Dentalpro Equipments Ltd | Health & social care | 2025 |
| Dentar LP | | 2014 |
| Dentcentral Limited | Wholesale & retail | 2005 |