| David Bikes Ltd | Manufacturing | 2019 |
| David Coleman Limited | Real estate | 2016 |
| David Fairclough Export Consultants Limited | Administrative & support | 2004 |
| David Hall Construction Limited | Wholesale & retail | 1990 |
| David J Evans Ltd | Professional & scientific | 2007 |
| David Nicholls Designs Ltd | Construction | 2021 |
| David Smith,St.Ives,Limited | Manufacturing | 1967 |
| David Thomas Properties Limited | Real estate | 2017 |
| Davies Property Investments Limited | Real estate | 2015 |
| Davies Solar Energy Systems Limited | Manufacturing | 2014 |
| Davinci Interior & Building Supplies Ltd | Construction | 2018 |
| Davis Fabrications Ltd | Manufacturing | 2023 |
| Davis Hire Ltd | Administrative & support | 2021 |
| Davitan Limited | Health & social care | 2018 |
| Davsi Properties Ltd | Real estate | 2019 |
| Davy Engineering Limited | Wholesale & retail | 1989 |
| Davzon Ltd | Wholesale & retail | 2021 |
| Dawgill Property Limited | Households | 2023 |
| Dawros Construction Services Ltd | Construction | 2025 |
| Dawson Bowman Architects Limited | Professional & scientific | 2025 |
| Day Building Services Limited | Construction | 2018 |
| Day Houses Ltd | Real estate | 2019 |
| Day OUT With the Kids Holdings Limited | Financial services | 2020 |
| Day OUT With the Kids Ltd | Arts & recreation | 2006 |
| Daycare (UK) Limited | Administrative & support | 2007 |
| Dayfresh Market Ltd | Wholesale & retail | 2026 |
| Daylight Investments Ltd | Real estate | 2026 |
| Daytech Ltd | Information & communication | 2011 |
| Dazzle Dental Laboratory Ltd | Manufacturing | 2014 |
| DB Engineering Solutions Ltd | Professional & scientific | 2024 |
| DB47 Investments Limited | Real estate | 2022 |
| DB9 Flow Ltd | Transport & logistics | 2025 |
| DBA Law Limited | Professional & scientific | 2024 |
| DBM HR Limited | Construction | 2014 |
| DBY Flooring Ltd | Construction | 2018 |
| DC Academy & Performance Ltd | Other services | 2023 |
| DC Event Production Ltd | Professional & scientific | 2025 |
| DC Fitness Coaching Ltd | Other services | 2025 |
| DC Living Ltd. | Real estate | 2017 |
| DC Plant Limited | Administrative & support | 2024 |
| DC Software Consultancy Ltd | Information & communication | 2026 |
| DC Systems Limited | Information & communication | 1989 |
| DC Training & Consulting Limited | Professional & scientific | 2015 |
| DC Vehicles Ltd | Transport & logistics | 2024 |
| DCF Decorating Ltd | Construction | 2019 |
| DCI Electrical & Security Limited | Construction | 2025 |
| DCM Building Services Ltd | Construction | 2017 |
| DD Franchise UK Ltd | Hospitality | 2016 |
| DD25 Ltd | Administrative & support | 2025 |
| Ddmarc Ltd | Health & social care | 2022 |
| DDS Building & Roofing Ltd | Construction | 2020 |
| DDW Quality Solutions Limited | Other services | 2025 |
| DE Banke Aeronautics LP | | 2018 |
| DE Banke Aviation LLP | | 2018 |
| DE Banke Group Limited | Information & communication | 2000 |
| DE Silva Group Ltd | Real estate | 2019 |
| Dealbox (Midlands) Ltd | Professional & scientific | 2025 |
| Deancourt Construction Limited | Construction | 1998 |
| Deancourt Properties Limited | Financial services | 2012 |
| DEB Ductwork Systems Limited | Construction | 2001 |
| DEB ECM Consultant Limited | Information & communication | 2016 |
| Debrett's PE Limited | Financial services | 2022 |
| Debt Education & Literacy Project Ltd | Education | 2025 |
| Debt Managers (Services) Limited | Administrative & support | 2012 |
| DEC Electrical Ltd | Energy | 2019 |
| Decave Limited | Wholesale & retail | 2008 |
| Decenter Tubes Limited | | 1983 |
| Deco Leisure Properties Limited | Households | 2004 |
| Decor My Event Ltd. | Hospitality | 2024 |
| Decorative Renders Limited | Construction | 2016 |
| Decorum Bride Limited | Wholesale & retail | 2012 |
| DEE Organ Limited | Professional & scientific | 1957 |
| DEE RVN Ltd | Professional & scientific | 2026 |
| Deepa Beauty Parlour Ltd | Other services | 2019 |
| Deepak Mathur Limited | Health & social care | 2013 |
| Deepblue Logistics Ltd | Transport & logistics | 2016 |
| Deepdene Care Limited | Health & social care | 1987 |
| Deery Limited | Construction | 2008 |
| Defining Aesthetics Limited | Health & social care | 2022 |
| Deftech Limited | Wholesale & retail | 2016 |
| Deity Designs Ltd | Wholesale & retail | 2021 |
| Dekon Company Limited | Manufacturing | 2015 |
| Del's Stays Ltd | Hospitality | 2025 |
| Delarke Properties Limited | Real estate | 2025 |
| Delegate the Day Ltd | Administrative & support | 2024 |
| Delivery Pharmacy Limited | Wholesale & retail | 2006 |
| Delta Carpets (Holdings) Limited | Wholesale & retail | 1999 |
| Delta Carpets Ltd. | Wholesale & retail | 1980 |
| Delta MM Limited | Professional & scientific | 2017 |
| Delturn Contracts Limited | Construction | 2024 |
| Delux Creative Ltd | Professional & scientific | 2018 |
| Demand Eleven Ltd | Information & communication | 2026 |
| Demetriou Property Limited | Real estate | 2022 |
| Demo Plus Ltd | Wholesale & retail | 2013 |
| Demo Solutions Ltd | Construction | 2026 |
| Demolition Engineering Services Ltd | Financial services | 2024 |
| Dempsey Furnishings Ltd | Manufacturing | 2018 |
| Denman Properties Limited | Real estate | 2016 |
| Dennis Fell Properties Limited | Real estate | 1962 |
| Dennor Limited | Administrative & support | 2014 |