| Digital Oasis Ltd | Information & communication | 2018 |
| Digital Spark Growth Ltd | Information & communication | 2025 |
| Digitalks.Tech Ltd | Administrative & support | 2017 |
| Dihuk Ltd | Other services | 2017 |
| DIL Consulting Ltd | Professional & scientific | 2026 |
| Dillglove Limited | Wholesale & retail | 1981 |
| Dillons Newsagents Limited | Wholesale & retail | 1915 |
| Diltek Limited | Information & communication | 2016 |
| Dimension Foundry Ltd | Administrative & support | 2025 |
| Dind Ltd | Wholesale & retail | 2012 |
| Dine at Home Series Ltd | Wholesale & retail | 2020 |
| Dinmate Ltd | Administrative & support | 2024 |
| Dinsmores Limited | Manufacturing | 1973 |
| Dinstock Holdings Limited | Financial services | 2023 |
| Dioner Ltd | Administrative & support | 2024 |
| Dipreck Ltd | Wholesale & retail | 2024 |
| Direct Agent Management Ltd | Information & communication | 2024 |
| Direct Digital Controls Limited | Professional & scientific | 2000 |
| Direct Lease Ltd | Administrative & support | 2020 |
| Direct Management Group Limited | Wholesale & retail | 2023 |
| Direct Motor Group Ltd | Wholesale & retail | 2023 |
| Direct Motors Limited | Wholesale & retail | 2017 |
| Direct Pharma Services Limited | Professional & scientific | 2023 |
| Direct Worldwide Link Ltd | Transport & logistics | 2022 |
| Directdrive Services Ltd | Wholesale & retail | 2026 |
| Dirt Tour Ltd. | Information & communication | 2025 |
| Disciplined Training Ltd | Arts & recreation | 2022 |
| Discount Platform Limited | Wholesale & retail | 2023 |
| Discount Tyres (Glos) Limited | Wholesale & retail | 2019 |
| Discovery Bay Property Company Limited | Administrative & support | 2001 |
| Dished Heads Ltd | Wholesale & retail | 2012 |
| Dishwashers Direct Limited | Wholesale & retail | 2018 |
| Dispatcha Ltd | Transport & logistics | 2025 |
| Distinctive Learning Ltd | Professional & scientific | 2020 |
| District Spice Limited | Hospitality | 2025 |
| Diteclear Ltd | Administrative & support | 2024 |
| Divali Ltd | Real estate | 2021 |
| Diverse Support Limited | Health & social care | 2013 |
| Divine & Co. Ltd | Professional & scientific | 2020 |
| Divine Healthcare Solutions Limited | Health & social care | 2021 |
| Divine Organisation Ltd | Wholesale & retail | 2025 |
| Divine Property Services Ltd | Construction | 2008 |
| Divine Real Estate Ltd | Real estate | 2017 |
| Divine Shelters Limited | Health & social care | 2023 |
| Divine Support 247 Healthcare Ltd | Health & social care | 2020 |
| DIVINE242 Ltd | Wholesale & retail | 2023 |
| Divinity Services Ltd | Public administration | 2018 |
| Dixon Rail Ltd | Construction | 2018 |
| Dixons Pubs Ltd | Hospitality | 2026 |
| Dixy Chicken Walsall Ltd | Hospitality | 2022 |
| Dixy Pizza Walsall Ltd | Hospitality | 2023 |
| Dixy Walsall Ltd | Hospitality | 2017 |
| Diyar Estates Ltd | Hospitality | 2026 |
| Djaks Investments Ltd | Construction | 2022 |
| DJB Global Property Ltd | Real estate | 2025 |
| DJC Holdings WM Ltd | Financial services | 2025 |
| DJE Joinery and Developments Limited | Construction | 2014 |
| DJH Stylists Ltd | Other services | 2018 |
| Djinn Genie (London) Limited | Manufacturing | 2014 |
| DJL Estates Ltd | Real estate | 2022 |
| DJR Property Group Limited | Health & social care | 2025 |
| DJS Bricklaying Ltd | Construction | 2024 |
| DJS Business Services Limited | Professional & scientific | 2006 |
| DJT Engineering (Midlands) Limited | Manufacturing | 2012 |
| DK Welding Ltd | Manufacturing | 2019 |
| DKG Homes Ltd | Real estate | 2024 |
| DKG Professional Services Limited | Information & communication | 2025 |
| DKR Accountants Ltd | Professional & scientific | 2010 |
| DKR Audit Services Ltd | Professional & scientific | 2019 |
| DKR Management Services Limited | Professional & scientific | 2015 |
| DKR Services & Consultancy Ltd | Professional & scientific | 2017 |
| DKS Telecom Ltd | Manufacturing | 2020 |
| DKU Performance Ltd | Administrative & support | 2026 |
| DL Provisions Security Services UK Ltd | Administrative & support | 2018 |
| Dlankellie Ltd | Transport & logistics | 2024 |
| DLC Building Services & Sons Limited | Construction | 2009 |
| DLD Housing Limited | Real estate | 2024 |
| DLD Lettings Ltd | Real estate | 2018 |
| DLF Saddlery Ltd | Manufacturing | 2012 |
| Dlowo Production Ltd | Information & communication | 2026 |
| DLS Building Ltd | Construction | 2021 |
| DM Educational & Training Services Limited | Education | 2015 |
| DMA Property Developments Limited | Construction | 2020 |
| DMC Catering Limited | Hospitality | 2019 |
| DMM Security and Risk Management Ltd | Administrative & support | 2022 |
| DMS Meats Limited | Wholesale & retail | 2020 |
| DMW Lettings Ltd | Real estate | 2024 |
| DN Fibre Splicing Services Ltd | Construction | 2022 |
| DNA Automotive (West Midlands) Limited | Wholesale & retail | 2024 |
| DNA Construction (Midlands) Ltd | Construction | 2013 |
| DNA Electrical Contractors Ltd | Construction | 2015 |
| DNA Investment Holdings Ltd | Construction | 2020 |
| DNG Care Ltd | Health & social care | 2025 |
| DNL Haulage Ltd | Transport & logistics | 2022 |
| DNS Convenience Ltd | Wholesale & retail | 2022 |
| DNS Europa Ltd | Wholesale & retail | 2025 |
| Dnsflow Delivery Ltd | Transport & logistics | 2026 |
| DNT4L Limited | Health & social care | 2024 |
| DNY Express Ltd | Transport & logistics | 2025 |
| Doal Building Group Ltd | Construction | 2020 |