| Datchet Healthcare Limited | Health & social care | 2021 |
| Datchet Jones Ltd | Administrative & support | 2018 |
| Datchet Manor Properties Limited | Real estate | 2023 |
| Datchet Motor Repairs Ltd | Wholesale & retail | 2025 |
| Datchet Motors Ltd | Wholesale & retail | 2023 |
| Datchet One Stop Ltd | Wholesale & retail | 2024 |
| Datchet Parish Centre | Other services | 1994 |
| Datchet Partners Limited | Construction | 2024 |
| Datchet Spice Lounge Ltd | Hospitality | 2024 |
| Datchet Water Sailing Club Limited | Arts & recreation | 1976 |
| Dattasai SAP Solutions Ltd | Information & communication | 2015 |
| Davey's Properties Ltd | Real estate | 2023 |
| Daveyhire Limited | Information & communication | 2002 |
| David Casey Ltd | Transport & logistics | 2015 |
| David Consulting Ltd | Transport & logistics | 2023 |
| David John (Papers) Limited | Wholesale & retail | 1972 |
| David Kemp Installations Limited | Real estate | 2025 |
| David Kemp Productions Limited | Arts & recreation | 2010 |
| David Kentt Limited | Wholesale & retail | 2018 |
| Davide Construct Plus Ltd | Transport & logistics | 2025 |
| Davies & Co. (UK) Ltd | Transport & logistics | 2007 |
| Davies Building Ltd | Construction | 2025 |
| Davis Scanning Services Limited | Health & social care | 2026 |
| Davs 123 Ltd | Construction | 2025 |
| DAW Stoke Poges Limited | Wholesale & retail | 2012 |
| Dawat Heathrow Ltd | Hospitality | 2025 |
| Dawid Building Services Limited | Manufacturing | 2021 |
| Dawn Order Ltd | Professional & scientific | 2021 |
| Dawn Redwood Close Management Co. Limited | Households | 1981 |
| Dawn Solicitors Ltd | Professional & scientific | 2014 |
| Dawnchange Limited | Extraterritorial | 1988 |
| Dawola Ltd | Transport & logistics | 2022 |
| Day & Night Airport Transfers Ltd | Transport & logistics | 2024 |
| Day 'N' Nite Limited | Wholesale & retail | 2011 |
| Day Night R Ltd | Wholesale & retail | 2017 |
| DB Electrical Services (Berks) Ltd | Construction | 2026 |
| DB Engineering Projects Ltd | Professional & scientific | 2016 |
| DB Properties Ltd | Real estate | 2021 |
| DBC Windsor Ltd | Transport & logistics | 2014 |
| Dbds Transport Ltd | Transport & logistics | 2025 |
| DBP R&D Consulting Ltd | Professional & scientific | 2018 |
| Dbsc Property Investments Ltd | Real estate | 2025 |
| Dbverse Limited | Information & communication | 2023 |
| DBW Properties Limited | Real estate | 2014 |
| DC Cargo Solutions Ltd | Transport & logistics | 2025 |
| DC Cloud Solutions Limited | Information & communication | 2019 |
| DC Logistics Uxbridge Ltd | Transport & logistics | 2019 |
| Dcda Ltd | Transport & logistics | 2025 |
| Dcdc Civils Ltd | Construction | 2021 |
| Dcent Investments Limited | Real estate | 2021 |
| Dcfm Holdings Ltd | Financial services | 2026 |
| Dcfm Investments Ltd | Financial services | 2026 |
| DCH Enterprises Ltd | Wholesale & retail | 2010 |
| DD Apps Ltd | Information & communication | 2026 |
| DDB Leisure Ltd | Arts & recreation | 2012 |
| Ddbdsj Corporation Ltd | Information & communication | 2020 |
| Ddconstruction 7 Ltd | Construction | 2024 |
| DDG Services Ltd | Transport & logistics | 2023 |
| DDS Transport Ltd | Transport & logistics | 2025 |
| DE Dream Spirits Ltd | Hospitality | 2026 |
| Deacon Cars Limited | Manufacturing | 2025 |
| Deadshot/Ricochet Ltd | Information & communication | 2024 |
| Deaf Club Ltd | Extraterritorial | 2023 |
| Deal Hunter Guys Ltd | Wholesale & retail | 2025 |
| Deal Page Ltd | Real estate | 2026 |
| Deal Sourcing Machine Ltd | Administrative & support | 2024 |
| Dealbridge Solutions Ltd | Administrative & support | 2025 |
| Dealoria Ltd | Wholesale & retail | 2025 |
| Dealquest Ltd | Wholesale & retail | 2024 |
| Dear Emotions Limited | Information & communication | 2025 |
| Dear Smile Limited | Health & social care | 2024 |
| Debcav Healthcare Limited | Health & social care | 2018 |
| Debjan Limited | Wholesale & retail | 2025 |
| Decent Care Limited | Health & social care | 2023 |
| Decent International Ltd | Hospitality | 2019 |
| Decent Removals & Storage Ltd | Transport & logistics | 2018 |
| Decent Removals & Transport Ltd | Transport & logistics | 2022 |
| Deckmasters UK Limited | Construction | 2018 |
| Declare and Decree PVT Ltd | Financial services | 2020 |
| Decor by Inna Ltd | Administrative & support | 2023 |
| Decorating Delights Ltd | Construction | 2025 |
| Decourt Finishing Contractors Limited | Construction | 2014 |
| DEE F Care Services [PVT] Ltd | Health & social care | 2024 |
| Deeja Ltd | Wholesale & retail | 2022 |
| Deejay Marts Ltd | Wholesale & retail | 2025 |
| Deen Global Ltd | Wholesale & retail | 2026 |
| Deep Building Services Ltd | Construction | 2020 |
| Deep Cheema Ltd | Wholesale & retail | 2026 |
| Deep Etch Games Ltd | Manufacturing | 2021 |
| Deep Foundations Specialists Limited | Professional & scientific | 2012 |
| Deep Hill Diner Limited | Hospitality | 2020 |
| Deep Properties and Build Ltd | Real estate | 2024 |
| Deep Properties Slough Ltd | Construction | 2023 |
| Deepankar Julka Ltd | Professional & scientific | 2025 |
| Deepgarh Transport Limited | Transport & logistics | 2026 |
| Deepsha Ltd | Information & communication | 2026 |
| Deeshan Consultancy Limited | Information & communication | 2017 |
| Deeside Care Holdings LLP | | 2013 |
| Deevena Ltd | Information & communication | 2026 |
| Defence Datasec Ltd | Information & communication | 2022 |