| Denby Woodville Ltd | Real estate | 2010 |
| Densdale Cars Limited | Transport & logistics | 2026 |
| Density Services Limited | Professional & scientific | 2021 |
| Dent Art 4U Limited | Health & social care | 2016 |
| Denton Developments (Herts) Limited | Real estate | 2016 |
| Dentscan Limited | Health & social care | 2004 |
| Denyer Construction Limited | Construction | 2012 |
| Derby Investments and Developments Limited | Real estate | 2017 |
| Derevianko Beauty Ltd | Wholesale & retail | 2024 |
| Derma Sense Group Ltd | Health & social care | 2026 |
| Dervish & Kubilay Investments Ltd | Real estate | 2026 |
| DES Logistics Ltd | Transport & logistics | 2026 |
| Desi Dough PVT Ltd | Hospitality | 2025 |
| Design 21 Ltd | Professional & scientific | 2022 |
| Design Crew Ltd | Other services | 2017 |
| Design Group 66 Ltd | Administrative & support | 2025 |
| Design Line Services Ltd. | Professional & scientific | 2016 |
| Design-Surgery London Limited | Extraterritorial | 2015 |
| Design-Surgery Mannequins Limited | Extraterritorial | 2016 |
| Designer Life Coaching Ltd | Other services | 2007 |
| Designstore Limited | Professional & scientific | 2006 |
| Desilu Developments Ltd | Construction | 2015 |
| Desk London Ltd | Professional & scientific | 2018 |
| Details London Limited | Other services | 2025 |
| DEV Tech IT Ltd | Information & communication | 2020 |
| Deva Gate Ltd | Real estate | 2025 |
| Developments of London Limited | Construction | 2013 |
| Devere Properties London Ltd | Real estate | 2007 |
| Deviation Collective Limited | Information & communication | 2025 |
| Devon and Cornwall Car Parks Limited | Transport & logistics | 2014 |
| Dewbridge Limited | Financial services | 2017 |
| Dewsbury Car Parks Limited | Transport & logistics | 2014 |
| Dexcrest Limited | Professional & scientific | 1975 |
| Dexcrest Technical Services Limited | Administrative & support | 2010 |
| Dexfit Ltd | Arts & recreation | 2026 |
| Dextera Parte Limited | Financial services | 2022 |
| DEY Ltd | Professional & scientific | 2023 |
| Dezashib Ltd | Administrative & support | 2024 |
| Dfdv Limited | Administrative & support | 2024 |
| DFL (London) Limited | Administrative & support | 2006 |
| Dgsm Associates Limited | Professional & scientific | 2023 |
| DGU Collection LLP | | 2021 |
| DGW Carpentry Ltd | Construction | 2011 |
| DGW Contracts Ltd | Manufacturing | 2012 |
| DH Trees & Gardens Ltd | Administrative & support | 2020 |
| Dhes Limited | Health & social care | 2012 |
| Dhoniya Limited | Administrative & support | 2024 |
| Dial Select Limited | Wholesale & retail | 2026 |
| Dial Square Designs Limited | Professional & scientific | 2020 |
| Dialgreen Estates Limited | Real estate | 1999 |
| Dialgreen Estates Management Limited | Hospitality | 2009 |
| Diamond Acquisitions Holdings Limited | Financial services | 2022 |
| Diamond Capital London NO 1 Ltd | Financial services | 2015 |
| Diamond Corporation Limited | Real estate | 2002 |
| Diamond Corporation NO 2 Limited | Real estate | 2020 |
| Diamond Equitas Capital Limited | Financial services | 2025 |
| Diamond Equitas Limited | Financial services | 2018 |
| Diamond Housing Management Limited | Real estate | 2018 |
| Diamond Investment Management I Ltd | Real estate | 2019 |
| Diamond Investment Management II Limited | Real estate | 2019 |
| Diamond Investment Management Limited | Real estate | 2019 |
| Diane Wright Financial Services Ltd | Professional & scientific | 2014 |
| Diaspora Development Hub Ltd | Education | 2025 |
| Diaz Martial Arts Ltd | Education | 2022 |
| Dice Construction Ltd | Construction | 2020 |
| Digibrain Media Limited | Information & communication | 2018 |
| Digicom Talent Ltd | Administrative & support | 2019 |
| Digigate Services Ltd | Transport & logistics | 2015 |
| Digital NET Limited | Information & communication | 2005 |
| Digital Post Studio Ltd | Professional & scientific | 2016 |
| Digital Print Supplies Limited | Wholesale & retail | 2022 |
| Digiteck Copiers & Scanners Limited | Administrative & support | 2011 |
| Dilber Limited | Hospitality | 2024 |
| Diligenc Capital Limited | Professional & scientific | 2021 |
| Diligenc Holdings LLP | | 2021 |
| Diligenc Pathways Ltd | Professional & scientific | 2021 |
| Dillon Naidoo Physique Coaching and Development Limited | Other services | 2017 |
| Dimarsa Ltd | Real estate | 2022 |
| Dimelia Ltd | Construction | 2016 |
| Dimigi Ltd | Information & communication | 2020 |
| Dingdong Dough Limited | Manufacturing | 2026 |
| Dink Computer Systems Limited | Information & communication | 1997 |
| Diorama Design Ltd | Construction | 2023 |
| Diorama Limited | Professional & scientific | 2010 |
| Dipglens Investments Limited | Real estate | 1958 |
| Direct Distribution Limited | Wholesale & retail | 2023 |
| Direct Partners UK Limited | Administrative & support | 2005 |
| Direct Recruitment Solutions Ltd | | 2011 |
| Direct Source Healthcare Ltd | Administrative & support | 2016 |
| Direct to Desk Group Ltd | Wholesale & retail | 2025 |
| Dirra Limited | Real estate | 2019 |
| Dirt Busters Cleaning and Maintenance Ltd | Administrative & support | 2012 |
| DIS Infotech Ltd | Real estate | 2018 |
| Disc Consult Ltd | Real estate | 2024 |
| Discount Cisco Limited | Wholesale & retail | 2007 |
| Discovery Networks Limited | Information & communication | 1998 |
| Displayways Events Ltd | Manufacturing | 2023 |
| Displayways Limited | Manufacturing | 1991 |
| Displayways Sign Company Limited | Administrative & support | 2019 |
| Displayways Visual Communications Ltd | Administrative & support | 2016 |