| Davenport Clearwater Group Ltd | Wholesale & retail | 2025 |
| David Ashwood Pipefitting Services Limited | Administrative & support | 2023 |
| David Gould Design Ltd | Professional & scientific | 2015 |
| David M Oneill Assosciates Ltd. | Other services | 2016 |
| David Yelland Electrical Limited | Manufacturing | 2024 |
| Davies & Co Group Holdings Limited | Real estate | 2023 |
| Dawat BRO Ltd | Hospitality | 2023 |
| Daylight and Sunlight (UK) Limited | Professional & scientific | 2009 |
| Days Lane Primary School | Education | 2014 |
| Daysies Florist Limited | Wholesale & retail | 2022 |
| Dayspring Centre Limited | Health & social care | 2018 |
| Dayton Asset Management Limited | Real estate | 2026 |
| DBS Contracts Limited | Construction | 1992 |
| DBW Controls Ltd | Professional & scientific | 2022 |
| DC & Daughters Ltd | Construction | 2024 |
| DC Car Sales (Kent) Ltd | Wholesale & retail | 2011 |
| DC Rosa Limited | Construction | 2015 |
| Dc&D Group Ltd | Construction | 2024 |
| Dc-Rae Personal Shopper Ltd | Other services | 2025 |
| DDA Watch Ltd | Other services | 2010 |
| DDB Construction Support Limited | Construction | 2023 |
| DDC Europe Ltd | Information & communication | 2010 |
| DDP Electrical Limited | Construction | 2026 |
| DE Bogga Limited | Real estate | 2025 |
| Deabreu Consulting Limited | Professional & scientific | 2024 |
| Deals Gallery Ltd | Extraterritorial | 2022 |
| Dean Construction Solutions Ltd | Construction | 2023 |
| Deanfield Limited | Professional & scientific | 2024 |
| Deanthony Properties Limited | Financial services | 2021 |
| Debell & Hosier Property Services Limited | Real estate | 2022 |
| Debonair Cleaning Services Limited | Administrative & support | 2005 |
| Dedica Design Limited | Professional & scientific | 1996 |
| DEE Cook Florist Limited | Wholesale & retail | 2013 |
| Dee's Sweets 'N ' Treats Ltd | Wholesale & retail | 2022 |
| Deep Dive Technologies Ltd | Information & communication | 2023 |
| Defluo Plumbing and Drainage Limited | Construction | 2008 |
| Delex Property Services Ltd | Real estate | 2022 |
| Delex Supplies Ltd | Wholesale & retail | 2023 |
| Delex Supplies RT Ltd | Wholesale & retail | 2025 |
| Delivery Management Systems Ltd | Information & communication | 2019 |
| Delmora International Limited | Manufacturing | 2019 |
| Demel (Kent) Limited | Hospitality | 2025 |
| Demetris Michael Associates Engineering Services Limited | Professional & scientific | 2020 |
| Demsc Solutions Ltd | Administrative & support | 2024 |
| Denise Blake Clinical Research Limited | Administrative & support | 2004 |
| Denman Enforcement Services UK Limited | Administrative & support | 2025 |
| Dental Haven Ltd | Health & social care | 2023 |
| Dering Studio Limited | Construction | 2014 |
| Dermabien UK Ltd | Wholesale & retail | 2020 |
| DES Hope Consultancy Limited | Administrative & support | 2017 |
| Design and Management Contractors Limited | Construction | 1985 |
| Design Creating Business Ltd | Administrative & support | 2006 |
| Design Mosaic Ltd | Information & communication | 2013 |
| Designbygrace Limited | Professional & scientific | 2018 |
| Desk Dividers Ltd | Manufacturing | 2026 |
| Desmond O'Neill Features Ltd | Administrative & support | 2008 |
| Detonik Limited | Professional & scientific | 2017 |
| Development Catalyst Limited | Administrative & support | 2024 |
| Devhands Limited | Administrative & support | 2016 |
| Devine Oral Surgery Ltd | Administrative & support | 2023 |
| Dewabo Limited | Information & communication | 2024 |
| Dexson Contracts Ltd. | Construction | 2017 |
| Dexson Drylining Ltd | Construction | 2024 |
| Dexson Projects Ltd | Construction | 2024 |
| Dffb Services Limited | Construction | 2024 |
| DFR Logistics Ltd | Administrative & support | 2025 |
| DG Automation Limited | Professional & scientific | 2015 |
| DG Beauty Ltd | Other services | 2024 |
| DG Nightlife Ltd | Hospitality | 2025 |
| DHI Home Improvement Services Limited | Professional & scientific | 2019 |
| DI Figaro Limited | Real estate | 2020 |
| Diamond Kebab (Guildford) Limited | Hospitality | 2020 |
| Diamond London Estate Group Ltd | Real estate | 2025 |
| Diamond Refurbishments (UK) Limited | Construction | 2013 |
| Diamond Shutters Ltd | Construction | 2005 |
| Diamond Shutters Properties Ltd | Households | 2023 |
| Dibber Limited | Professional & scientific | 2013 |
| Diego Jacquet Consultancy Limited | Administrative & support | 2013 |
| Digbah Limited Company Limited | Public administration | 2020 |
| Digital CFO Limited | Information & communication | 2019 |
| Digital Empowerment Group Ltd | Extraterritorial | 2022 |
| Digital Entertainment Solutions Limited | Wholesale & retail | 2009 |
| Digital Lemon Talent Ltd | Administrative & support | 2016 |
| Digital One (UK) Limited | Administrative & support | 2009 |
| Digital Print London Limited | Manufacturing | 2008 |
| Digital Pursuit Ltd | Administrative & support | 2012 |
| Digital Stream Services Limited | Information & communication | 2017 |
| Digital Works Consultancy Limited | Administrative & support | 2017 |
| Digitally Ltd | Information & communication | 2026 |
| Dilawarigahan Industries Ltd | Real estate | 2022 |
| Direct Transport Makers Limited | Transport & logistics | 2021 |
| Discerning Ltd | Health & social care | 2018 |
| Discover AV Limited | Information & communication | 2018 |
| Distinct Financial Services Limited | Financial services | 2014 |
| Divine Bakery Limited | Manufacturing | 2025 |
| Divwin Mortgages Ltd | Financial services | 2023 |
| Dixon Floor Limited | Construction | 2015 |
| DJ Dizzy Entertainment Limited | Administrative & support | 2016 |
| DJA Electrical Ltd | Construction | 2016 |
| Djasmins Ltd | Health & social care | 2021 |