| Dependon Electrical Limited | Construction | 2019 |
| Dependon Financial Services Limited | Financial services | 2018 |
| Dependon Group Limited | Professional & scientific | 2018 |
| Dependon Holding Limited | Financial services | 2018 |
| Dependon Limited | Construction | 2013 |
| Depth of Field Limited | Professional & scientific | 2018 |
| Dermachoice Ltd | Wholesale & retail | 2025 |
| Desai Solutions Limited | Professional & scientific | 2018 |
| Descartes & Mauss Limited | Information & communication | 2022 |
| Desi Coffee Co. Ltd | Wholesale & retail | 2025 |
| Design FOX Collective Limited | Information & communication | 2026 |
| Despatch Point Ltd | Transport & logistics | 1995 |
| Dessert Point Franchise Ltd | Hospitality | 2023 |
| Destination Basingstoke Limited | Information & communication | 2003 |
| Desumo Ltd | Construction | 2012 |
| Devantai Ltd | Information & communication | 2026 |
| Devine Cleaning Services Limited | Administrative & support | 2011 |
| Devineprovidence Ltd | Health & social care | 2020 |
| Devlin Controls Ltd | Manufacturing | 2013 |
| Devlin Electronics Limited | Manufacturing | 2011 |
| Devlin Technology Holdings Limited | Manufacturing | 2020 |
| Devonish Plastering Ltd | Construction | 2007 |
| Devos Holdings Ltd | Real estate | 2025 |
| Dexium Ltd | Other services | 2024 |
| Dezign Koncept Limited | Professional & scientific | 2025 |
| DG Building Ltd | Construction | 2018 |
| DG Construction Group Ltd | Administrative & support | 2016 |
| DG Parking Services Limited | Information & communication | 2022 |
| DG Plumbing and Building Services Ltd | Administrative & support | 2016 |
| DGG Private Ltd | Real estate | 2021 |
| DGL Energy Limited | Professional & scientific | 2009 |
| Dhakksha Limited | Wholesale & retail | 2023 |
| Dhanlax Ltd | Wholesale & retail | 2026 |
| DI Mambro Properties Ltd | Real estate | 2020 |
| Diag Tools UK Ltd | Information & communication | 2021 |
| Diagmed Healthcare Limited | Wholesale & retail | 2003 |
| Diaspora Ventures LLP | | 2022 |
| Dice Tower Gaming Ltd | Hospitality | 2021 |
| Dickies Location Facilities Ltd | Hospitality | 2026 |
| Dicky Birds PRE School Nurseries Limited | Education | 1998 |
| Digey Homes Limited | Construction | 2015 |
| Digey Limited | Construction | 2004 |
| Digidrop Group Collections & Security Ltd | Administrative & support | 2020 |
| Digidrop Ltd | Information & communication | 2017 |
| Digital Charta LP | | 2013 |
| Digital Commerce Services Ltd | Information & communication | 2018 |
| Digital Fire Doors Limited | Information & communication | 2021 |
| Digital Living Solutions Limited | Information & communication | 2006 |
| Digital Modus Ltd | Information & communication | 2020 |
| Digital Projects Run 4U Ltd | Information & communication | 2017 |
| Digital Reboot Ltd | Professional & scientific | 2022 |
| Digital SAW Ltd | Wholesale & retail | 2021 |
| Digitally Responsive Ltd | Information & communication | 2002 |
| DIL Kumar Ltd | Real estate | 2024 |
| Dillistone Group PLC | Information & communication | 2002 |
| Dillon Construction Services Ltd | Construction | 2026 |
| Dillon Development Centre Football Ltd | Education | 2025 |
| Dinners Dunn Ltd | Wholesale & retail | 2025 |
| Dino Motor Company Limited | Wholesale & retail | 2025 |
| Disability Football Collective CIC | Education | 2022 |
| Display Manager Limited | Information & communication | 1996 |
| Display MAX Limited | Manufacturing | 1996 |
| Disruptive Adventure Ltd | Information & communication | 2022 |
| Disruptive Edge Ltd | Information & communication | 2018 |
| Disruptive Graduate Consulting Limited | Professional & scientific | 2018 |
| Disruptive Things Ltd | Information & communication | 2026 |
| Diverse Portfolio Trading Ltd | Wholesale & retail | 2024 |
| Divi Realty Limited | Real estate | 2021 |
| Divinity Care Global Services Ltd | Health & social care | 2020 |
| DIY Diggers Ltd | Wholesale & retail | 2017 |
| DJ Print LAB Ltd | Manufacturing | 2026 |
| DJ Taylor Services Ltd | Construction | 2005 |
| Djas Systems Limited | Information & communication | 2018 |
| Djin Tech Ltd | Information & communication | 2018 |
| DKA Living Renovation Ltd | Construction | 2026 |
| DKR IT Consulting UK Limited | Information & communication | 2018 |
| DLM Accountancy Services Limited | Professional & scientific | 2012 |
| DLM Structures Ltd | Professional & scientific | 2014 |
| DLR (NO.1) Limited | Financial services | 2005 |
| DLR (NO.2) Limited | Financial services | 2008 |
| DLR Debtco Holdco Limited | Manufacturing | 2025 |
| DLR Debtco Limited | Manufacturing | 2025 |
| DLT Industries Ltd | Professional & scientific | 2024 |
| DM Lazar Limited | Professional & scientific | 2025 |
| DMA Projects Limited | Financial services | 2025 |
| DMA Storage Limited | Construction | 2012 |
| DMA Trans Ltd | Transport & logistics | 2025 |
| DMS Rail and Maritime Engineering Limited | Transport & logistics | 2017 |
| DMT Private Hire Ltd | Transport & logistics | 2026 |
| Dnaculture Ltd | Wholesale & retail | 2026 |
| DNS Cleaning Services Limited | Administrative & support | 2025 |
| Dny.Distribution Ltd | Transport & logistics | 2026 |
| Doccom 93 Ltd | Health & social care | 2011 |
| Dockie Technologies Ltd | Information & communication | 2026 |
| Doctor Watson Limited | Administrative & support | 2011 |
| Document Despatch Limited | Information & communication | 1997 |
| Doer Recruitment Ltd | Administrative & support | 2013 |
| Doff Doctor Ltd | Construction | 2025 |
| Dogglebox Ltd | Wholesale & retail | 2021 |
| Dohan Construct Ltd | Construction | 2017 |