| DC Rental Properties Ltd | Real estate | 2023 |
| DC Sunzhi Limited | Financial services | 2021 |
| DC Traffic Solutions Limited | Administrative & support | 2025 |
| DC Valet (London) Limited | Other services | 2013 |
| DC VMR Group Ltd | Construction | 2015 |
| DCA Financial Limited | Financial services | 2017 |
| Dcaquant Ltd | Information & communication | 2024 |
| DCB Technology Limited | Information & communication | 2019 |
| DCC Property Ltd | Real estate | 2025 |
| Dcems Limited | Arts & recreation | 2018 |
| DCF Brands Limited | Wholesale & retail | 2025 |
| Dcfw Limited | Administrative & support | 2002 |
| Dcgk Gateway Solutions Ltd | Professional & scientific | 2018 |
| DCJ Property Ltd | Construction | 2024 |
| DCJ Treble Ltd | Real estate | 2025 |
| DCK Ltd | Construction | 2025 |
| DCK Pavillion Limited | Construction | 2015 |
| DCL Connect Ltd | Hospitality | 2020 |
| DCN Trans Limited | Transport & logistics | 2017 |
| DCP Exhibitions Limited | Construction | 2018 |
| DCP Instruments Limited | Manufacturing | 2017 |
| Dcraft Limited | Information & communication | 2017 |
| Dcxx Group Ltd | Wholesale & retail | 2026 |
| DD Home Improvements Limited | Construction | 2018 |
| Dd's Dipped Desserts Limited | Hospitality | 2026 |
| Dddn Limited | Wholesale & retail | 2019 |
| DDM Transport Limited | Transport & logistics | 2016 |
| Ddncl Ltd | Real estate | 2025 |
| DDP Construction Services Ltd | Construction | 2018 |
| DDP Consulting Group Ltd | Professional & scientific | 2020 |
| Ddraig Studio Ltd | Information & communication | 2026 |
| DDS Carpentry Ltd | Construction | 2015 |
| DDS Holdings Pujnjab Limited | Financial services | 2026 |
| DDS Marketing Advisor Ltd | Administrative & support | 2019 |
| DE & DF (Coleford) Limited | Real estate | 2015 |
| DE Aerospace Limited | Manufacturing | 2017 |
| DE Argers' Shipping & Rigging Ltd | Construction | 2019 |
| DE Bordes Media Group Ltd | Information & communication | 2025 |
| DE Courceys Manor Holdings Ltd | Hospitality | 2009 |
| DE Gustibus I Ltd | Wholesale & retail | 2019 |
| DE Havilland Ulysses Ltd | Information & communication | 2016 |
| DE LA Rose Investments Ltd | Financial services | 2022 |
| DE Maid Solicitors and Advocates LLP | | 2007 |
| DE Maids Ltd | Professional & scientific | 2000 |
| DE Melo Construction Ltd | Construction | 2019 |
| DE Needu's Limited | Wholesale & retail | 2017 |
| DE ROI Ltd | Wholesale & retail | 2017 |
| DE Selby Limited | Manufacturing | 2019 |
| DE Skylit Limited | Health & social care | 2023 |
| DE Splendours Foods Ltd | Hospitality | 2023 |
| DE Telfair Imperial UK Ltd | Real estate | 2019 |
| DE Unique Design Ltd | Professional & scientific | 2025 |
| De-Grace 77CONSULTANTS Ltd | Health & social care | 2019 |
| De-T Global Logistics UK Limited | Administrative & support | 2026 |
| De:Vision Lifestyle Properties Limited | Real estate | 2006 |
| DEA UK Services Limited | Transport & logistics | 2019 |
| Deacon's Electrical Ltd | Construction | 2016 |
| Dead Cat Audio Ltd. | Information & communication | 2017 |
| Dead Ends Hair Salon Limited | Other services | 2020 |
| Deadstar Publishing Ltd | Information & communication | 2011 |
| Deaf Friendly Limited | Professional & scientific | 2022 |
| Deaf Gwdihŵ CIC | Arts & recreation | 2024 |
| Deal Hunter Ltd | Wholesale & retail | 2025 |
| Deal Logistics Ltd | Transport & logistics | 2026 |
| Deal NET Online Limited | Wholesale & retail | 2007 |
| Deal Tobaccos Limited | Manufacturing | 2012 |
| Deal's Forever Limited | Wholesale & retail | 2026 |
| Dealer Intouch Limited | Professional & scientific | 2016 |
| Deallory Ltd | Wholesale & retail | 2025 |
| Dealmandan Ltd | Real estate | 2025 |
| Deals (Wales) Limited | Wholesale & retail | 1994 |
| Dealshot Ltd | Wholesale & retail | 2021 |
| Dealswar Investments Limited | Real estate | 1961 |
| Dealz Observer Ltd | Administrative & support | 2023 |
| Deal’S Store Ltd | Wholesale & retail | 2025 |
| Dean Morrison Limited | Extraterritorial | 2019 |
| Dean Street Productions NO.20 LLP | | 2012 |
| Dean Street Productions NO.21 LLP | | 2012 |
| Dean Street Productions NO.22 LLP | | 2012 |
| Dean Street Productions NO.25 LLP | | 2013 |
| Dean Street Productions NO.26 LLP | | 2014 |
| Dean Thomas Group Ltd | Financial services | 2021 |
| Dean's Court Maintenance Co Ltd | Households | 1974 |
| Dean's RAG Book Company,Limited | Manufacturing | 1903 |
| Deanclay Limited | Information & communication | 2025 |
| Deane Veterinary Dentistry Limited | Professional & scientific | 2025 |
| Deane's Services Ltd | Hospitality | 2025 |
| Deans Beans Ltd | Manufacturing | 2021 |
| Deans Medical Ltd | Health & social care | 2024 |
| Deansgate Consultancy Limited | Professional & scientific | 2019 |
| Dearg Ltd | Professional & scientific | 2025 |
| Dearheart Productions Ltd | Information & communication | 1991 |
| Deaso Ltd | Wholesale & retail | 2025 |
| Deaura Global Ltd | Wholesale & retail | 2025 |
| Debasco &SON Limited | Wholesale & retail | 2023 |
| Debaud Ltd | Wholesale & retail | 2024 |
| Debono Bespoke Limited | Manufacturing | 2019 |
| Deborah Drew Designs Ltd | Professional & scientific | 2008 |
| Deborah Studio Consulting Limited | Professional & scientific | 2025 |
| Debranded Outlet Slough Limited | Wholesale & retail | 2019 |