| Delta API Limited | Information & communication | 2025 |
| Delta Electrical Contractors Ltd | Construction | 2018 |
| Delta Electrical Services Limited | Manufacturing | 2015 |
| Delta Rope Access Ltd | Construction | 2016 |
| Deluxe PUB Management Ltd | Hospitality | 2023 |
| Demat Engineering Ltd | Manufacturing | 2019 |
| Demilex Logistics Limited | Transport & logistics | 2016 |
| Dempsey Transport Limited | Transport & logistics | 2016 |
| Dennis Transport Ltd | Transport & logistics | 2019 |
| Densi Cleaning Ltd | Administrative & support | 2022 |
| Dentaid PDR Limited | Wholesale & retail | 2014 |
| Dentine Issues Ltd | Administrative & support | 2003 |
| Denville Energy Consulting Ltd | Information & communication | 2025 |
| Denz Ltd | Wholesale & retail | 2025 |
| DEO Wellbeing Clinic Ltd | Health & social care | 2026 |
| Desi Angrez Foods and Caterings Ltd | Hospitality | 2025 |
| Desi Basket Ltd | Wholesale & retail | 2025 |
| Design Edge Engineering Ltd | Professional & scientific | 2024 |
| Designer Frames (Nuneaton) Limited | Manufacturing | 2003 |
| Desilicious Café Ltd | Hospitality | 2024 |
| Dessert House Catering Limited | Hospitality | 2020 |
| DESSERTZ2GO Ltd | Hospitality | 2020 |
| Dev-El Machine Tools Limited | Manufacturing | 2013 |
| Deveron Court Management Company Limited | Households | 1991 |
| Devine Culinary Services Limited | Hospitality | 2015 |
| Dexion (Midlands) Limited | Extraterritorial | 2003 |
| DG Groundworks and Civils Limited | Construction | 2025 |
| DGL Services (Oldbury) Ltd. | Wholesale & retail | 1998 |
| Dhansa Ltd | Hospitality | 2024 |
| DHARA1 Limited | Health & social care | 2023 |
| DHG Limited | Wholesale & retail | 2026 |
| Dhiveya Limited | Wholesale & retail | 2017 |
| Dhruva Star Consulting Limited | Professional & scientific | 2023 |
| DIA Logistics Limited | Transport & logistics | 2020 |
| DIA Property Ltd | Real estate | 2020 |
| Diamed Engineering Ltd | Manufacturing | 2024 |
| Diamond Cars Cleaner Ltd | Administrative & support | 2025 |
| Diamond Star Properties Limited | Real estate | 2020 |
| Diary Barber Ltd | Other services | 2021 |
| Different Focus Ltd | Professional & scientific | 2023 |
| Digarch Consulting Ltd | Wholesale & retail | 2018 |
| Digital Brainz Ltd | Construction | 2024 |
| Digital Dolla Ltd | Wholesale & retail | 2023 |
| Diguida Ltd | Hospitality | 2024 |
| Dilley's Court (Huntingdon) RTM Company Ltd | Households | 2018 |
| Dimension Surveys Ltd | Construction | 2019 |
| Dimonmandrive Ltd | Transport & logistics | 2018 |
| Dimora Limited | Real estate | 2015 |
| Dinner Drop Limited | Professional & scientific | 2024 |
| Dino Composites Ltd | Construction | 2021 |
| DIO (Holdings) Ltd | Financial services | 2005 |
| Dipgo Limited | Transport & logistics | 2020 |
| Direct Contracts Limited | Water & waste | 2002 |
| Dirpmart Ltd | Wholesale & retail | 2025 |
| Dirt Demon Limited | Administrative & support | 2021 |
| Dixie Arms Hotel Ltd | Hospitality | 2019 |
| DJ Motorhome Hire Ltd | Administrative & support | 2020 |
| DJI Ronin Ltd | Wholesale & retail | 2014 |
| DJL Classic Detailing Limited | Construction | 2022 |
| DJO Group Limited | Professional & scientific | 2025 |
| DJS Competitions Limited | Administrative & support | 2009 |
| DK Roofing & Building Maintenance Limited | Construction | 2019 |
| DL Systems Limited | Information & communication | 2026 |
| Dlad Ltd | Health & social care | 2021 |
| DLP Financial Consultancy Ltd | Professional & scientific | 2024 |
| DLS Machining Services Limited | Manufacturing | 2008 |
| Dluxe Lounge Ltd | Hospitality | 2026 |
| DM Roofing & Construction Limited | Construction | 2019 |
| Dmechsit Ltd | Information & communication | 2026 |
| DMK Grocery Ltd | Wholesale & retail | 2018 |
| Dmys Transport Ltd | Transport & logistics | 2024 |
| DND International Ltd | Wholesale & retail | 2023 |
| DNS Trans Ltd | Transport & logistics | 2025 |
| DO Your Installations Ltd | Administrative & support | 2023 |
| Docsam Ltd | Health & social care | 2015 |
| Dodd Transport Ltd | Transport & logistics | 2024 |
| Dofollow Ltd | Professional & scientific | 2006 |
| Domes Services Ltd | Wholesale & retail | 2025 |
| Domestic Paradise Ltd | Wholesale & retail | 2018 |
| DON Macisaac Ltd | Construction | 2018 |
| DON Pedro Store Ltd | Wholesale & retail | 2022 |
| Done by Nature Ltd | Wholesale & retail | 2020 |
| Dorel Transport Ltd | Transport & logistics | 2018 |
| Doris & Dude Limited | Wholesale & retail | 2019 |
| Double Lace Wedding Films Ltd | Information & communication | 2022 |
| Doura Logistics Ltd | Transport & logistics | 2026 |
| Dovecott Joinery & Interiors Limited | Manufacturing | 2021 |
| DP Design Management Ltd | Information & communication | 2019 |
| DPR Developments Limited | Manufacturing | 2005 |
| DR Gurung Wellness & Aesthetics Ltd | Health & social care | 2026 |
| DR H Abid Ltd | Health & social care | 2026 |
| DR T Build Ltd | Construction | 2012 |
| Draft&Deliver Ltd | Professional & scientific | 2020 |
| Dragon Emporium Wholesale Ltd | Wholesale & retail | 2024 |
| Dragon Enterprises UK Ltd | Education | 2024 |
| Drain Daddies Limited | Water & waste | 2024 |
| Draper Manufacturing Limited | Manufacturing | 2010 |
| Drawn by Medics Ltd | Education | 2024 |
| Draycott Travels Ltd | Hospitality | 2024 |
| DRC Contractors Limited | Construction | 2006 |