| Data Force CC Ltd | Administrative & support | 2024 |
| Data Media and Research Ltd. | Information & communication | 1995 |
| Data Monster Limited | Extraterritorial | 2008 |
| Data Science Collective Limited | Information & communication | 2016 |
| Data Scripting Solutions Ltd | Manufacturing | 2023 |
| Data Security and Compliance Services Ltd | Information & communication | 2015 |
| Data Solutions (Holdings) Limited | Financial services | 2007 |
| Data Synergy UK Ltd | Information & communication | 2008 |
| Databoots Limited | Information & communication | 2023 |
| Databowl Limited | Information & communication | 2014 |
| Datagame Limited | Real estate | 1986 |
| Datah Ltd | Construction | 2018 |
| Dataleap Analytics Limited | Information & communication | 2025 |
| Dataled Ltd | Information & communication | 2023 |
| Datamills (UK) Ltd | Information & communication | 2011 |
| Dataplast Ltd. | Information & communication | 2015 |
| Datascrow Systems Limited | Information & communication | 2025 |
| Datatrainer Limited | Professional & scientific | 2014 |
| Datavision Labs Limited | Information & communication | 2025 |
| Datech Scientific Limited | Manufacturing | 1999 |
| Datn EDU Ltd | Education | 2024 |
| Datn Ltd | Information & communication | 2023 |
| Dats Auto Performance Ltd | Wholesale & retail | 2025 |
| Datum Autonomy Limited | Information & communication | 2026 |
| Datum Construction (SY) LLP | | 2025 |
| DAU & Daria Limited | Transport & logistics | 2013 |
| Daubney Variety & Gala Agency Limited | Arts & recreation | 2003 |
| Daughtry & Daughtry Ltd | Extraterritorial | 1997 |
| Dauntless VIP Ltd | Administrative & support | 2020 |
| Davally Garden Services Limited | Construction | 2011 |
| Davco Haulage Ltd | Transport & logistics | 2022 |
| Dave Bradley Consulting Limited | Health & social care | 2015 |
| Dave Galloway Ltd | Information & communication | 2023 |
| Dave Kneeshaw Consulting Ltd | Health & social care | 2016 |
| Dave Laycock Ltd | Real estate | 2012 |
| Dave Naylor Construction Ltd | Construction | 2025 |
| Dave Sanderson Limited | Professional & scientific | 2014 |
| Davenport Capital Limited | Financial services | 2017 |
| Daventrade Limited | Real estate | 1986 |
| Daver (Minianchor) Ltd | Manufacturing | 2023 |
| Daver Developments Limited | Construction | 2021 |
| Daver Holdings Limited | Manufacturing | 2017 |
| David Clark Functional Safety Limited | Professional & scientific | 2025 |
| David Construct Ltd | Construction | 2020 |
| David COX Golf Limited | Wholesale & retail | 2024 |
| David DE Menezes Communications Limited | Professional & scientific | 2013 |
| David Gazda Consultancy Ltd | Other services | 2021 |
| David Hill & SON Limited | Construction | 2006 |
| David J Howe Landscaping & Groundcare Ltd | Administrative & support | 2015 |
| David John Ltd | Wholesale & retail | 2025 |
| David L Walker Limited | Professional & scientific | 2009 |
| David LAM Limited | Health & social care | 2009 |
| David M Thurkettle Consulting Limited | Professional & scientific | 2017 |
| David Malin - Kitchens & Bedrooms Ltd | Wholesale & retail | 2021 |
| David Marray Tennis Academy Limited | Arts & recreation | 2006 |
| David Mason Eco Design Ltd | Professional & scientific | 2015 |
| David Mcphee Chartered Architect Limited | Professional & scientific | 2011 |
| David Nicholson Property Limited | Real estate | 2011 |
| David Owens Creative Limited | Professional & scientific | 2021 |
| David Platts Ltd | Professional & scientific | 2023 |
| David Price Consulting Ltd | Professional & scientific | 2022 |
| David Pride Shoes Limited | Professional & scientific | 1999 |
| David Riley Powder Coatings Limited | Construction | 2003 |
| David Rosen Limited | Information & communication | 2023 |
| David Shaw Design and Build Limited | Construction | 2015 |
| David Spencer Limited | Real estate | 2006 |
| David Tomblin Ltd | Information & communication | 2012 |
| David Turley Ltd | Information & communication | 2017 |
| David&Sophia Limited | Transport & logistics | 2019 |
| David’S Designs Limited | Professional & scientific | 2024 |
| Davies & Tate PLC | Extraterritorial | 1982 |
| Davies Street Developments Limited | Professional & scientific | 1987 |
| Davies Street Estates Limited | Professional & scientific | 1987 |
| Davies Street Folkestone Limited | Construction | 2012 |
| Davies Street Investments Limited | Professional & scientific | 1987 |
| Davies Street Ludlow Limited | Construction | 2017 |
| Davies Street Properties Limited | Construction | 1984 |
| Davies Street Windmill Limited | Administrative & support | 2014 |
| Davinci Media Ltd | Information & communication | 2024 |
| Davinci Smiles Limited | Real estate | 2020 |
| Davis & Thompson Limited | Real estate | 2026 |
| Davis French & Associates Specialist Site Services Ltd | Administrative & support | 2020 |
| Davis GAS & Heat Limited | Construction | 2026 |
| Davis, French & Associates Ltd | Administrative & support | 2007 |
| Davisnet Systems Ltd | Construction | 2014 |
| Davison Construction Limited | Construction | 2024 |
| Davison Property Investments Holdings Ltd | Real estate | 2004 |
| Davison Property Investments Ltd | Real estate | 2019 |
| Davison Property Services Ltd | Real estate | 2016 |
| Davy & Davy Limited | Wholesale & retail | 2020 |
| Davy Films Limited | Information & communication | 2023 |
| Dawar Q Limited | Wholesale & retail | 2017 |
| Dawato Limited | Real estate | 2020 |
| Dawid DD Services Ltd | Wholesale & retail | 2024 |
| Dawid Properties Ltd | Real estate | 2021 |
| Dawn of the Dark FOX Ltd | Information & communication | 2018 |
| Dawn's Cobblers and Keys (Nottingham) Ltd | Wholesale & retail | 2024 |
| Dawson Global Holdings Ltd | Financial services | 2026 |
| DAX Bay Films Ltd | Information & communication | 2026 |
| Daxprodriver Ltd | Extraterritorial | 2016 |