| Ddcmdesign Ltd | Real estate | 2025 |
| DDD Civils Ltd | Construction | 2024 |
| DDD Trading Ltd | Wholesale & retail | 2023 |
| Ddes (EA) Ltd | Professional & scientific | 2022 |
| DDI Products Ltd | Professional & scientific | 2007 |
| DDL (Worldwide) Ltd | Information & communication | 2020 |
| DDM Care Limited | Health & social care | 2013 |
| DDR Intelligence Ltd | Health & social care | 2025 |
| DDT Fire and Security Ltd | Professional & scientific | 2022 |
| DE Gema Ltd | Information & communication | 2026 |
| DE LA Vies DRY Edge Steakhouse Limited | Hospitality | 2021 |
| DE LA Warr Estates Limited | Real estate | 2015 |
| DE Montana Limited | Information & communication | 2024 |
| DE Nominees Limited | Extraterritorial | 2013 |
| DE Novo Developments Limited | Construction | 2004 |
| DE Sousa Development Consultants Ltd | Professional & scientific | 2017 |
| DE Supplies & Services Ltd | Wholesale & retail | 2016 |
| DE Villiers Group Limited | Administrative & support | 2026 |
| DE Vroomen Property LLP | | 2015 |
| De'Ath Event Management Limited | Hospitality | 2013 |
| Dead Husband Club Limited | Information & communication | 2025 |
| Dead Sharp Limited | Information & communication | 2021 |
| Deadman Worldwide Holdings Limited | Financial services | 2024 |
| Deadmole Limited | Construction | 2023 |
| Deal Engineering Services Limited | Professional & scientific | 2022 |
| Deal the Best Ltd | Professional & scientific | 2020 |
| Dealflow Property Limited | Real estate | 2026 |
| Dealsdirect (Birmingham) Ltd | Wholesale & retail | 2017 |
| Deamer Properties Ltd | Real estate | 2024 |
| Dean Critoph Services Ltd. | Professional & scientific | 2012 |
| Dean Farm Solar Developments Limited | Energy | 2022 |
| Dean Williams Executive Coach Limited | Other services | 2009 |
| Deancall Ltd | Real estate | 2024 |
| Deans Aviation Services Ltd | Other services | 2014 |
| Deary Ltd | Construction | 2013 |
| Debbage & Tubby (Windows) Limited | Construction | 1996 |
| Debbage & Tubby Limited | Extraterritorial | 2008 |
| Debbie ANN Stimpson Limited | Professional & scientific | 2024 |
| Deben Mill Management Company Limited | Households | 2002 |
| Deben Print Company Limited(The) | Manufacturing | 1982 |
| Debenham Pharma Limited | Wholesale & retail | 2025 |
| Deblins Green Trading Ltd | Financial services | 2026 |
| Debmarco Ltd | Real estate | 2023 |
| Deborah Arise International Ltd | Other services | 2024 |
| Deborah Milsom Consulting Ltd | Professional & scientific | 2015 |
| Debriggs Ltd | Hospitality | 2014 |
| Debs Tea Stall Ltd | Hospitality | 2026 |
| Debug Media Ltd | Information & communication | 2025 |
| Debugbear Ltd | Information & communication | 2018 |
| Debz Glam & Styles Ltd | Wholesale & retail | 2025 |
| Decade Plumbing & Heating Limited | Construction | 2023 |
| Declanjordanservices Ltd | Construction | 2024 |
| Decome Ltd | Construction | 2021 |
| Decorative Mouldings UK Ltd | Manufacturing | 2018 |
| Decorative Services Ltd | Construction | 2015 |
| DEE DEE Care Limited | Health & social care | 2017 |
| Deeba Developments Ltd | Construction | 2015 |
| Deeba Surfacing and Landscaping Ltd | Administrative & support | 2022 |
| Deep Learning Technologies Ltd | Information & communication | 2017 |
| Deep Release Limited | Administrative & support | 2002 |
| Deep Restraint Ltd | Manufacturing | 2022 |
| Deepmore Energy Centre Limited | Energy | 2021 |
| Deeppool Technologies Ltd | Professional & scientific | 2011 |
| Deepwave UK Limited | Professional & scientific | 2025 |
| Deer's Glade Cottages Ltd | Real estate | 2025 |
| Deerfoot LLP | | 2025 |
| Deerheart Collective Limited | Other services | 2018 |
| Deerheart Print Co Ltd | Manufacturing | 2020 |
| Dehal Group Ltd. | Transport & logistics | 2019 |
| Dekar Tackle Ltd | Wholesale & retail | 2021 |
| DEL Digital Ltd | Professional & scientific | 2024 |
| Delcon Properties Ltd | Real estate | 2025 |
| Delhi Divan (Brierley Hill) Limited | Hospitality | 2018 |
| Deli a Go Go Ltd | Wholesale & retail | 2010 |
| Delicious Racing Ltd | Arts & recreation | 2023 |
| Delightful Tech Limited | Professional & scientific | 2024 |
| Deliver 365 Ltd | Transport & logistics | 2019 |
| Delivered ENT Limited | Transport & logistics | 2025 |
| Delivery Direct Norfolk Ltd | Transport & logistics | 2025 |
| Delivery Express Ltd | Transport & logistics | 2025 |
| Delivery Matters Ltd | Information & communication | 2016 |
| Delivery of Care Limited | Administrative & support | 2017 |
| Della Rotonda Limited | Real estate | 2024 |
| Dellaney Gibbons Design Ltd | | 2013 |
| Delltech Limited | Wholesale & retail | 2022 |
| Delmak Ltd | Transport & logistics | 2020 |
| Delmar Holdings (EA) Limited | Professional & scientific | 2009 |
| Delmar Pet & Garden Limited | Wholesale & retail | 2002 |
| Delmonte Ltd. | Professional & scientific | 1998 |
| Delnics Associates UK Limited | Wholesale & retail | 2022 |
| Delocate Ltd | Real estate | 2019 |
| Delongueuil Limited | Wholesale & retail | 2020 |
| Delos Pro Ltd | Real estate | 2022 |
| Delph & Co (Accountancy) Limited | Professional & scientific | 2003 |
| Delph & Co Ltd | Extraterritorial | 2004 |
| Delphi Derivatives Limited | Financial services | 2001 |
| Delphinium Properties Limited | Real estate | 2017 |
| Delta 4 Ltd | Professional & scientific | 2006 |
| Delta Financial Solutions Ltd | Professional & scientific | 2013 |
| Delta Fire Group Ltd | Financial services | 2019 |