| Dayz Ltd | Other services | 2025 |
| Dazlingdee Beauty Limited | Wholesale & retail | 2025 |
| DB Cargo (UK) Holdings Limited | Transport & logistics | 1995 |
| DB Cargo (UK) Limited | Transport & logistics | 1994 |
| DB Cargo International Limited | Transport & logistics | 1996 |
| DB Cargo Maintenance Limited | Manufacturing | 1988 |
| DB Comms Limited | Information & communication | 2022 |
| DB Deliveries (Doncaster) Ltd | Hospitality | 2022 |
| DB Fitness and Circuits Centre Limited | Arts & recreation | 2019 |
| DB Fresh Ltd | Wholesale & retail | 2017 |
| DB Phones Limited | Wholesale & retail | 2025 |
| DB Storage and Design Limited | Manufacturing | 2019 |
| DB Systel UK Limited | Information & communication | 2013 |
| DB Ward Medical Limited | Health & social care | 2016 |
| DB90 Prestigious Automobiles Limited | Wholesale & retail | 2014 |
| DB90 Prop Ltd | Real estate | 2024 |
| Dbbars Limited | Hospitality | 2025 |
| DBG Belgrave Block Management Ltd | Households | 2025 |
| DBG Canal Ltd | Real estate | 2024 |
| DBG Construct Ltd | Construction | 2024 |
| DBG Contractors Ltd | Construction | 2017 |
| DBG Developments Ltd | Construction | 2019 |
| DBG Electrical Ltd | Construction | 2019 |
| DBG Grey Friars Ltd | Construction | 2024 |
| DBG Group Holdings Ltd | Real estate | 2021 |
| DBG Group Ltd | Professional & scientific | 2022 |
| DBG Solar Ltd | Construction | 2024 |
| DBG Synergy House Ltd | Real estate | 2023 |
| DBH & S Ltd | Real estate | 2021 |
| Dbic Trading Limited | Other services | 2024 |
| Dbinstalluk Ltd | Construction | 2021 |
| DBO Automotive Ltd | Wholesale & retail | 2026 |
| DBO Training Solutions Ltd | Wholesale & retail | 2022 |
| DBS Construction Ltd | Construction | 2013 |
| DBS Holdings Yorkshire Ltd | Professional & scientific | 2017 |
| DBS Joinery & Building Services Ltd | Construction | 2018 |
| Dbuk IT Limited | Information & communication | 2013 |
| DC Aqua Systems Limited | Administrative & support | 2017 |
| DC Cladding Ltd | Construction | 2021 |
| DC Diesels Ltd | Transport & logistics | 2022 |
| DC Driving School Ltd | Education | 2024 |
| DC Installations (North) Ltd | Information & communication | 2013 |
| DC Installations and Repairs Limited | Construction | 2016 |
| DC Mini Market Limited | Wholesale & retail | 2025 |
| DC Personal Training Ltd | Arts & recreation | 2024 |
| DC Pharma Limited | Wholesale & retail | 2024 |
| DC Polymers Ltd | Wholesale & retail | 2020 |
| DC Tech Solutions Ltd | Construction | 2024 |
| DCB Events Limited | Other services | 2022 |
| DCH Services Limited | Other services | 2017 |
| Dchi & Testimony Global Ltd | Manufacturing | 2026 |
| DCL Kitchens Limited | Manufacturing | 2002 |
| DCM Architectural Ltd | Construction | 2024 |
| DCM Properties Ltd | Real estate | 2018 |
| Dcostel Ltd | Transport & logistics | 2022 |
| Dcro Construction Limited | Construction | 2022 |
| DCT Driving Ltd | Transport & logistics | 2017 |
| DCT Property Lettings Limited | Extraterritorial | 2024 |
| DCT Sports & Entertainment Ltd | Administrative & support | 2025 |
| DDA Joinery Ltd | Construction | 2024 |
| Ddbv Ltd | Professional & scientific | 2022 |
| DDD Couriers Ltd | Transport & logistics | 2023 |
| DDE Management Ltd | Transport & logistics | 2024 |
| DDF Ltd | Professional & scientific | 2025 |
| DDI Developments Ltd | Hospitality | 2015 |
| DDL HGV Work Ltd | Transport & logistics | 2020 |
| Ddrc Consultancy Limited | Professional & scientific | 2021 |
| DDS Distribution Limited | Transport & logistics | 2007 |
| DDW Solutions Ltd | Transport & logistics | 2023 |
| DE Beauvoir Forum Ltd | Administrative & support | 2025 |
| DE Haviland Consulting Ltd | Professional & scientific | 2025 |
| DE Luca Films Ltd | Information & communication | 2022 |
| DE Muziek Experience Ltd | Other services | 2024 |
| DE Suite Limited | Hospitality | 2008 |
| DEA Homes Ltd | Real estate | 2025 |
| Deacon Cars and Towing Ltd | Transport & logistics | 2026 |
| Deaf Elevation Ltd | Extraterritorial | 2021 |
| Deaf Solution Ltd | Health & social care | 2014 |
| Dealora AI Ltd | Information & communication | 2026 |
| Dean Allen Motors Ltd | Wholesale & retail | 2026 |
| Dean Auto Sales Ltd | Wholesale & retail | 2017 |
| Dean Cairns Joinery Ltd | Construction | 2013 |
| Dean Roberts Cyber Security Services Ltd | Information & communication | 2023 |
| Dean Transport Limited | Transport & logistics | 2016 |
| Dearne Projects Ltd | Construction | 2007 |
| Dearne Valley Mechanical Services Limited | Construction | 2012 |
| Dearne Valley Personal Development Centre | Arts & recreation | 2016 |
| Death by Limited | Hospitality | 2024 |
| Debbie Mills Medical Aesthetics Limited | Health & social care | 2019 |
| Deborah Jane Humphreys Ltd | Extraterritorial | 2024 |
| Deborah Stocks Ltd | Health & social care | 2025 |
| Debron Couriers Ltd | Transport & logistics | 2023 |
| Decebal Holdings Ltd | Wholesale & retail | 2025 |
| Decent CUT Barbers Limited | Other services | 2021 |
| Deceptive Music Limited | Arts & recreation | 1993 |
| Deceptive Records Limited | Arts & recreation | 1993 |
| Decidebloom Limited | Wholesale & retail | 1994 |
| Decisivus Consulting Ltd | Professional & scientific | 2013 |
| Decnology.Com Limited | Information & communication | 2023 |
| Deconinck Maritiem Service Ltd | Transport & logistics | 2026 |