| Dannah Relocations Ltd | Hospitality | 2019 |
| Dans MON Jardin Secret by Daba Ltd | Wholesale & retail | 2024 |
| Dapur Mariae Ltd | Manufacturing | 2021 |
| Dare and Dream Big Ltd | Information & communication | 2020 |
| Data Advisory Ltd | Information & communication | 2022 |
| Data Analytics & Visualisation Limited | Information & communication | 2021 |
| Datalix Limited | Information & communication | 2022 |
| Dataxive Ltd | Information & communication | 2014 |
| Datoo Group Ltd | Financial services | 2025 |
| Dave Rose Limited | Information & communication | 2007 |
| Davey Nexus Ltd | Real estate | 2024 |
| Davey Nexus Software Ltd | Information & communication | 2025 |
| David Chanell Garden Design Limited | Professional & scientific | 2018 |
| David Mcconaghy Photography Limited | Arts & recreation | 2017 |
| David Ritchie and Associates Ltd | Education | 2013 |
| David Williams Investments Ltd | Administrative & support | 2005 |
| Davies Development and Construction Ltd | Real estate | 2017 |
| Davit Properties Ltd | Real estate | 2026 |
| Dawes Lane (Roads) Ltd | Administrative & support | 2026 |
| Dazzling Lights Limited | Information & communication | 2014 |
| DB Play Ltd | Manufacturing | 2024 |
| Dbcg (Legal) Ltd | Professional & scientific | 2014 |
| Dbcg (London) Ltd | Health & social care | 2013 |
| Dbcg (Maricopa) Limited | Administrative & support | 2026 |
| Dbcg (UK) Limited | Health & social care | 2012 |
| Dbinfo Ltd | Information & communication | 2016 |
| DBL Consulting Ltd | Professional & scientific | 2020 |
| DBS Consulting Limited | Professional & scientific | 2021 |
| DC Partners Limited | Professional & scientific | 2012 |
| DC Transport Logistics Limited | Transport & logistics | 2026 |
| DC Windows Ltd | Construction | 2025 |
| Dccs Limited | Public administration | 2009 |
| DCM Aquisitions Limited | Real estate | 2023 |
| DCS Personal Fitness Ltd | Information & communication | 2022 |
| DD Site Management Limited | Construction | 2017 |
| DDR Investing Limited | Real estate | 2023 |
| Deacy Construction Limited | Construction | 2018 |
| Dean P Property Investment Ltd | Real estate | 2025 |
| Deane Court Management Ltd | Households | 2025 |
| Debonair Consulting Limited | Professional & scientific | 2012 |
| Decadent Diamonds Limited | Wholesale & retail | 2015 |
| Declanne Limited | Financial services | 2013 |
| Deegi Solutions Limited | Professional & scientific | 2021 |
| Deep White Design Limited | Professional & scientific | 2012 |
| Deepops Tech Ltd | Information & communication | 2025 |
| Dektec UK Limited | Wholesale & retail | 2014 |
| Delada Designs Limited | Professional & scientific | 2024 |
| Dell Electrical Services Limited | Construction | 2014 |
| Deller Holdings Ltd | Real estate | 2016 |
| Dello's Digital Copywriting Ltd | Professional & scientific | 2023 |
| Delmanor Limited | Households | 1990 |
| Delmond Fire Protection Limited | Construction | 2014 |
| Delta Family Office Services Limited | Professional & scientific | 2026 |
| Delta Romeo One Limited | Financial services | 2025 |
| Deluxe Ideas Ltd | Wholesale & retail | 2023 |
| Demour Ltd | Wholesale & retail | 2014 |
| Dempsey & Co Ltd | Professional & scientific | 2013 |
| Dempstech UK Ltd | Wholesale & retail | 2019 |
| Denewood Estates Limited | Professional & scientific | 2003 |
| Denmark Street Guitars Ltd | Wholesale & retail | 2013 |
| Denmax Limited | Health & social care | 1988 |
| Dentalia Limited | Manufacturing | 2000 |
| DER Catering Ltd | Hospitality | 2018 |
| Derwent Property Limited | Construction | 2015 |
| Desi Rascals Ltd | Wholesale & retail | 2026 |
| Design by Structure EOT Limited | Administrative & support | 2023 |
| Design by Structure Ltd | Professional & scientific | 2003 |
| Designlabs London Limited | Construction | 2010 |
| Devidales Care Ltd | Health & social care | 2022 |
| Devidales Ltd | Health & social care | 2022 |
| Devidales Nursery Ltd | Education | 2022 |
| Devine Consultancy Services Ltd | Professional & scientific | 2020 |
| Dewgrange Properties Limited | Real estate | 2016 |
| DEY King and Haria Ltd | Real estate | 2012 |
| Dgcc Property Limited | Real estate | 2015 |
| DH Capital Properties Ltd | Real estate | 2025 |
| DH Performance Ltd | Health & social care | 2016 |
| Dhsolicitors Limited | Professional & scientific | 2015 |
| Diamcorp Limited | Mining & quarrying | 2024 |
| Diamond OM Ltd | Real estate | 2014 |
| Diary Link Limited | Administrative & support | 2000 |
| Digitalgarden Ltd | Information & communication | 2011 |
| Digito Limited | Professional & scientific | 2015 |
| Dilus Ltd | Other services | 2022 |
| Dimmer JIM Limited | Arts & recreation | 2002 |
| Dinosaur DEN Limited | Wholesale & retail | 2003 |
| Dinsey Decor Ltd | Construction | 2021 |
| Dipak and Dipti LLP | | 2023 |
| Dipetsa Ltd | Manufacturing | 2019 |
| Direction Architects Ltd | Professional & scientific | 2021 |
| Directions Independent Living CIC | Administrative & support | 2019 |
| Dival Estates Ltd | Real estate | 2020 |
| Diveinto Ltd | Education | 2020 |
| Diverse Property Services Ltd | Real estate | 2023 |
| Divine Corporation Limited | Wholesale & retail | 2019 |
| Divitia Clothing Ltd | Wholesale & retail | 2021 |
| Divtec International Trading Limited | Wholesale & retail | 2005 |
| DIY UK Made Shutters Ltd | Extraterritorial | 2025 |
| Diyarbakir 21 Ltd | Hospitality | 2019 |
| Djway Ltd | Manufacturing | 2023 |