| Dartsgroup Limited | Professional & scientific | 2026 |
| Dartsworld Group Ltd | Professional & scientific | 2024 |
| Dartsworld Ltd | Professional & scientific | 2024 |
| Dartsworld Media Ltd | Extraterritorial | 2026 |
| Dartx Ltd | Arts & recreation | 2025 |
| Darty Lettings Management Ltd | Real estate | 2017 |
| Darza Ltd | Transport & logistics | 2026 |
| DAS Commercial Real Estate Limited | Real estate | 2026 |
| Dash Motor Group Ltd | Wholesale & retail | 2026 |
| DAT Building Ltd | Construction | 2019 |
| Data Ctrl Ltd | Professional & scientific | 2015 |
| Data Edge Global Ltd | Information & communication | 2026 |
| Data Tech Consulting Limited | Information & communication | 2007 |
| Datac Angel Limited | Health & social care | 2020 |
| DATAFABRIC9 Ltd | Information & communication | 2024 |
| Datamaildm Limited | Administrative & support | 2008 |
| Datastep Limited | Information & communication | 2003 |
| Datatogo Limited | Information & communication | 2022 |
| Datl Ltd | Transport & logistics | 2020 |
| Dave Gibson Transport Ltd | Transport & logistics | 2019 |
| Dave Houses Ltd | Real estate | 2023 |
| Dave Pearson Engineering Limited | Manufacturing | 2002 |
| Daves Handyman Services Ltd | Construction | 2016 |
| David & Edward Services Limited | Wholesale & retail | 2016 |
| David & EDY Ltd | Transport & logistics | 2020 |
| David Anastase Ltd | Transport & logistics | 2026 |
| David and Rachele Enterprises Ltd | Real estate | 2021 |
| David BK Ltd | Wholesale & retail | 2022 |
| David Hall Publishing Limited | Information & communication | 1985 |
| David Meek Consulting Ltd | Construction | 2023 |
| David Meredith Property Ltd | Real estate | 2006 |
| David Perrett Associates Limited | Professional & scientific | 2013 |
| David Peters London Limited | Health & social care | 2015 |
| David Webb Associates Limited | Professional & scientific | 2014 |
| Davies Contracting Limited | Agriculture & fishing | 2013 |
| Davies Staffing Limited | Health & social care | 2015 |
| Davin Interiors Ltd | Construction | 2014 |
| Davina Teaches Science Limited | Education | 2026 |
| Davis Home Renovations Ltd | Real estate | 2026 |
| Davis Renovations Ltd | Construction | 2022 |
| Davita Ventures Limited | Financial services | 2024 |
| Dawomi Ltd | Wholesale & retail | 2023 |
| Day CAD Design Ltd | Manufacturing | 2023 |
| Day Consultancy Services Ltd | Information & communication | 2009 |
| Day Models Ltd | Manufacturing | 2025 |
| Daymond Healthcare Limited | Health & social care | 2023 |
| Daytona (GB) Limited | Administrative & support | 2006 |
| Daytona One Ltd | Real estate | 2024 |
| Dazzle Dizzle Limited | Administrative & support | 2012 |
| Dazzled Lighting Ltd | Wholesale & retail | 2013 |
| DB Cornershop Ltd | Wholesale & retail | 2024 |
| DBD Productions Ltd | Professional & scientific | 2025 |
| DBM Property Investments Limited | Real estate | 2021 |
| DBT Scaffolding Solutions Ltd | Construction | 2023 |
| Dc.Boiler Services Ltd | Construction | 2021 |
| DC61 Limited | Other services | 2022 |
| Dcarbon Consulting Ltd | Professional & scientific | 2022 |
| DCI Properties Limited | Real estate | 2013 |
| Dcorals Limited | Real estate | 2024 |
| Dcti Solutions Ltd | Professional & scientific | 2022 |
| DD Hail&Pdr Ltd | Wholesale & retail | 2023 |
| DD IT Services Ltd | Information & communication | 2019 |
| DD Motor Group Limited | Wholesale & retail | 2026 |
| DD Taxi Ltd | Transport & logistics | 2019 |
| DDI Refrigeration Ltd | Manufacturing | 2022 |
| DDK Construction Ltd | Construction | 2026 |
| DDS Logistics Europe 95 Ltd | Transport & logistics | 2025 |
| DE Ade's Ltd | Wholesale & retail | 2024 |
| DE BES Facilities Solutions Ltd | Real estate | 2014 |
| DE Frias Management Services Limited | Professional & scientific | 2020 |
| DE Haven Hub Ltd | Wholesale & retail | 2024 |
| DE LUX Optics Ltd | Health & social care | 2024 |
| DE Pentonville Media Ltd | Information & communication | 2017 |
| DE Raat Security Products Ltd | Wholesale & retail | 1995 |
| Dead Sound Management Limited | Arts & recreation | 2020 |
| Dead Time Ltd | Wholesale & retail | 2020 |
| Deadnice Limited | Health & social care | 2018 |
| Deafblind Enablement Ltd | Professional & scientific | 2010 |
| Dealbox Peterborough Ltd | Wholesale & retail | 2024 |
| Dean Investment Group Ltd | Real estate | 2024 |
| Dean's (Peterborough) Ltd. | Construction | 2006 |
| Deane’S Design & Developments Limited | Construction | 2020 |
| Deannah's Diner Ltd | Hospitality | 2025 |
| Dear House Limited | Real estate | 2018 |
| Debrah Consulting Limited | Real estate | 2024 |
| Debski Ltd | Transport & logistics | 2026 |
| Debt Line Limited | Extraterritorial | 2019 |
| Decipher Engineering Ltd | Manufacturing | 2019 |
| Deck Chair Developments Limited | Real estate | 1995 |
| Decomid Limited | Professional & scientific | 2025 |
| Decoy Enterprises Ltd | Real estate | 2025 |
| Decoy Holdings Ltd | Financial services | 2007 |
| DED Sourcing Advisory Limited | Professional & scientific | 2014 |
| Deen Crescent Management Limited | Households | 2025 |
| Deen Mortgage Services Ltd | Financial services | 2021 |
| Deen Salah Ltd | Hospitality | 2026 |
| Deens Limited | Hospitality | 2017 |
| Deens Produce Ltd | Wholesale & retail | 2020 |
| Deens Properties Management Ltd | Real estate | 2023 |
| Deep in Balloons Ltd | Manufacturing | 2007 |