| Dasesa Research Ltd | Professional & scientific | 2026 |
| Dashers Logistics Ltd | Transport & logistics | 2026 |
| Dasilva Industries Ltd | Professional & scientific | 2025 |
| Dasilva Recycling Ltd | Manufacturing | 2025 |
| Dastaango Ltd | Professional & scientific | 2026 |
| Data & UX Ltd | Information & communication | 2025 |
| Data Always WIN Limited | Information & communication | 2022 |
| Data Drift Limited | Financial services | 2024 |
| Data Ideas Limited | Information & communication | 1989 |
| Data Magnetics Technologies Limited | Information & communication | 2025 |
| Data Ravens IO Ltd | Information & communication | 2024 |
| Data Together Limited | Information & communication | 2024 |
| Data, Digital and Technology Limited | Information & communication | 2020 |
| Datacraft Consulting Limited | Administrative & support | 2024 |
| Datadecrypt Ltd | Information & communication | 2023 |
| Datahart Limited | Other services | 2025 |
| Dataonearth Ltd | Information & communication | 2026 |
| Datatec Services Limited | Wholesale & retail | 2017 |
| Datum Investment 6 Limited | Financial services | 2017 |
| Dauber Homes Management Limited | Households | 1985 |
| Daubern Business Solutions Limited | Professional & scientific | 2023 |
| Daures Consulting Ltd | Professional & scientific | 2026 |
| Davey AI Limited | Information & communication | 2025 |
| Davey Luxe Group Limited | Professional & scientific | 2026 |
| David Barnett Limited | Professional & scientific | 2010 |
| David Boltun Ltd | Information & communication | 2025 |
| David Dove (Recovery) Ltd | Transport & logistics | 2019 |
| David Factor Consultancy Ltd | Professional & scientific | 2025 |
| David James Cooksey Ltd | Real estate | 2026 |
| Davidas Logistics Ltd | Transport & logistics | 2018 |
| Davids Barbers Bury ST Edmunds Ltd | Other services | 2025 |
| Davies Breton Ltd | Manufacturing | 2013 |
| Davis Vehicle Solutions (DVS) Ltd | Wholesale & retail | 2020 |
| Day & Night Stays Ltd | Real estate | 2025 |
| Day 22 Clothing Limited | Wholesale & retail | 2026 |
| Day One Trading Limited | Wholesale & retail | 2026 |
| Day to Day Software Ltd | Information & communication | 2015 |
| Dayboat Limited | Wholesale & retail | 2017 |
| Daydawnz Tutoring Community Interest Company | Education | 2022 |
| Dayna Ashli Ltd | Health & social care | 2026 |
| Daystone Ltd | Wholesale & retail | 2020 |
| Daze Gallery Ltd | Information & communication | 2025 |
| DB & a Cooper (Suffolk) Limited | Wholesale & retail | 1994 |
| DB Live Sound Ltd | Professional & scientific | 2016 |
| DB Refurbishments Limited | Construction | 2017 |
| DB Restaurants Limited | Hospitality | 2023 |
| DBM Services (Yorkshire) Limited | Real estate | 2019 |
| DBR Design & Build (Norfolk) Ltd | Administrative & support | 2022 |
| DBT Scaffolding Limited | Construction | 2020 |
| Dbxal Ltd | Construction | 2021 |
| DC Musicals Shows Limited | Wholesale & retail | 2025 |
| Dcbz Properties Limited | Construction | 2021 |
| DCD Transporters Ltd | Manufacturing | 2020 |
| Dceb Consultancy Ltd | Professional & scientific | 2017 |
| DCR International Search & Selection Limited | Administrative & support | 2008 |
| DCW International Ltd | Professional & scientific | 2018 |
| DD Homes Ltd | Real estate | 2024 |
| DD Homes SL Ltd | Real estate | 2026 |
| Ddqss Ltd | Professional & scientific | 2025 |
| DE Braai Limited | Other services | 2016 |
| DE Cora Care Ltd | Health & social care | 2018 |
| DE Montfort Literature Ltd | Wholesale & retail | 2018 |
| DE Ornelas Advisory Group Ltd | Information & communication | 2025 |
| DE Sausmarez Psychology Limited | Education | 2024 |
| DE' Vigri Limited | Wholesale & retail | 2025 |
| De.Goda Ltd | Real estate | 2018 |
| DE3P Services Ltd | Administrative & support | 2026 |
| Deabea Limited | Professional & scientific | 2024 |
| Dead Fridge Farm Limited | Manufacturing | 2018 |
| Deakins Property Group Ltd | Real estate | 2025 |
| Deal Hunters FBA Ltd | Wholesale & retail | 2022 |
| Dealey Environmental Ltd | Agriculture & fishing | 2007 |
| Deals Plus Limited | Other services | 2019 |
| Dealvo Limited | Wholesale & retail | 2025 |
| Dean Assets Ltd | Real estate | 2018 |
| Dean Consultancy Services Limited | Professional & scientific | 2025 |
| Dear Jones Limited | Manufacturing | 2024 |
| Deb-Gi Ltd | Wholesale & retail | 2024 |
| Debonair Management Services Limited | Professional & scientific | 1997 |
| Debonair Services Limited | Health & social care | 1998 |
| Debt Recovery Experts Limited | Financial services | 2025 |
| Debt Zero Ltd | Information & communication | 2026 |
| Decatium Limited | Information & communication | 2025 |
| Decidr Ltd | Information & communication | 2026 |
| DECK8 Ltd. | Information & communication | 2024 |
| Deckled Edge Limited | Manufacturing | 2012 |
| Dedicated Apparel Limited | Wholesale & retail | 2019 |
| Deecop Ltd | Real estate | 2018 |
| Deefc Limited | Wholesale & retail | 2025 |
| Deen Designer Ltd | Wholesale & retail | 2021 |
| Deep Blue Marine Emporium Ltd | Wholesale & retail | 2024 |
| Deep Security Services Ltd | Administrative & support | 2025 |
| Deepnovo Ltd | Professional & scientific | 2025 |
| Deer Impact Solutions Limited | Agriculture & fishing | 2022 |
| Deeshar Ltd | Information & communication | 2018 |
| Defarge Limited | Real estate | 2009 |
| Deferry Holdings Limited | Financial services | 2020 |
| DEG Property Investment Ltd | Real estate | 2025 |
| Dehua Global Ltd | Wholesale & retail | 2025 |
| Dejumbled Ltd | Information & communication | 2010 |