| Danieloo Construction Ltd | Construction | 2022 |
| Daniels Development Corporation Limited | Extraterritorial | 2007 |
| Daniel’S Property Care Ltd | Construction | 2026 |
| Danish Foods Limited | Hospitality | 2026 |
| Danish Packages PVT Limited | Wholesale & retail | 2024 |
| Danish Services Ltd | Information & communication | 2026 |
| Daniyal Halal Meats & Groceries Ltd | Wholesale & retail | 2024 |
| Daniyal Halal Meats Ltd | Wholesale & retail | 2015 |
| Danmil Management Ltd | Professional & scientific | 2025 |
| Danny Apparel Limited | Wholesale & retail | 2011 |
| Danny Barry Limited | Construction | 2020 |
| Dans Consultancy Limited | Information & communication | 2025 |
| Danson Estate Company Limited | Real estate | 2023 |
| Danum Limited | Manufacturing | 2017 |
| Dany Auto Traders Ltd | Wholesale & retail | 2018 |
| Danyliuk Construction Services Ltd | Construction | 2024 |
| Dapper DĪN Ltd | Wholesale & retail | 2025 |
| DAR & Sons Holdings Limited | Administrative & support | 2025 |
| DAR AL Rahmah Ltd | Education | 2010 |
| DAR Asset Holdings Limited | Real estate | 2026 |
| DAR Construction East London Ltd | Construction | 2026 |
| DAR Education Ltd | Education | 2023 |
| DAR Investment Ltd | Real estate | 2020 |
| DAR Medical Advisory Limited | Health & social care | 2022 |
| DAR Supermarket Limited | Wholesale & retail | 2021 |
| Daraz Ltd | Wholesale & retail | 2020 |
| Darbnz Ltd | Administrative & support | 2024 |
| Dare Salon Limited | Other services | 2022 |
| Daria Trans Limited | Transport & logistics | 2024 |
| Daria's True-Dreams Limited | Wholesale & retail | 2025 |
| Daris Education Limited | Education | 2026 |
| Dark Rose Limited | Wholesale & retail | 2025 |
| DARK4 UK Ltd | | 2023 |
| Darkdusk Limited | Wholesale & retail | 2019 |
| Darns Enterprises Ltd | Information & communication | 2016 |
| Darns Real Estates Ltd | Real estate | 2023 |
| Darows Limited | Wholesale & retail | 2020 |
| Darrant Properties Limited | Real estate | 2017 |
| Darwin Travel Limited | Other services | 2022 |
| Dary Ltd | Construction | 2018 |
| DAS Enterprise London Ltd | Wholesale & retail | 2022 |
| Dash CAB Ltd | Transport & logistics | 2025 |
| Dashmesh Trading (Essex) Ltd | Transport & logistics | 2019 |
| Dask Traders Ltd | Construction | 2024 |
| Dass Transport Services Ltd | Transport & logistics | 2024 |
| DAT Optometry Limited | Wholesale & retail | 2016 |
| Data (UK) Ltd | Wholesale & retail | 2014 |
| Data Cable Installation Limited | Construction | 2021 |
| Data Craft IT Limited | Information & communication | 2025 |
| Data Expertz Limited | Information & communication | 2014 |
| Data Guys Ltd | Information & communication | 2024 |
| Data Mantras Ltd | Information & communication | 2017 |
| Data Plus (Smc-Pvt) Limited | Information & communication | 2025 |
| Datacast SRL Limited | Real estate | 2017 |
| Datacrest Technologies Limited | Information & communication | 2026 |
| Datavortex Analytics Ltd | Information & communication | 2025 |
| Datawave Creative Limited | Information & communication | 2026 |
| Dataweave Ltd | Information & communication | 2026 |
| Datel Telecom Limited | Administrative & support | 2015 |
| Datelight Limited | Wholesale & retail | 1988 |
| Datka Ltd | Wholesale & retail | 2025 |
| Datrel LAB Limited | Information & communication | 2025 |
| Datt Investments Ltd | Real estate | 2025 |
| Dattani Real Estate Ltd | Real estate | 2024 |
| Datum Engineering Services Ltd | Real estate | 2006 |
| Dauntless Consultants Limited | Administrative & support | 2014 |
| Dauti Heating & Plumbing Ltd | Construction | 2026 |
| Dave Consulting Ltd | Professional & scientific | 2010 |
| Dave Jobs I.T Services Ltd | Information & communication | 2025 |
| Dave Richold Services Ltd | Information & communication | 2017 |
| Davenant Foundation | Health & social care | 1984 |
| Daves Consulting Limited | Information & communication | 2010 |
| David and Natalie Spurling Limited | Other services | 2015 |
| David Builders Ltd | Construction | 2018 |
| David Enterprise Limited | Wholesale & retail | 2025 |
| David Lawrence Limited | Manufacturing | 2003 |
| David Leech Architects Ltd | Professional & scientific | 2018 |
| David Parley Ltd | Real estate | 2016 |
| David Solicitors Ltd | Professional & scientific | 2017 |
| David Vasilca Ltd | Administrative & support | 2025 |
| David&Yasemin Ltd | Transport & logistics | 2020 |
| Davide Limited | Construction | 2023 |
| Davis C Limited | Construction | 2018 |
| Davis Services Limited | Professional & scientific | 2023 |
| Davmuta & Partners Ltd | Wholesale & retail | 2008 |
| Davy Trans Ltd | Construction | 2018 |
| Dawid Clothing Company Limited | Wholesale & retail | 2020 |
| Dawid Electronix Limited | Wholesale & retail | 2019 |
| Dawlish Construction Limited | Construction | 2004 |
| Dawn Dairy Ltd | Wholesale & retail | 2012 |
| Dawn Mart Ltd | Wholesale & retail | 2024 |
| Dawshire Ltd | Real estate | 2024 |
| Day 2 Day Accountancy Limited | Professional & scientific | 2022 |
| Day 2 Day Stationery Limited | Wholesale & retail | 2005 |
| Day Logistics Ltd | Transport & logistics | 2025 |
| Day Nursery Lietutis Ltd. | Health & social care | 2013 |
| Dayal Construction Ltd | Construction | 2025 |
| Dayal G Investment Ltd | Real estate | 2024 |
| Daydream Innovations Ltd | Wholesale & retail | 2025 |
| Dayna Ltd | Information & communication | 2025 |