| Deluxe Building Services Limited | Construction | 2020 |
| Deluxe Desire Limited | Other services | 2017 |
| Deluxe INT Ltd | Wholesale & retail | 2023 |
| Deluxe Nails & Spa Ltd | Other services | 2018 |
| Deluxe Property Group Limited | Real estate | 2022 |
| Deluxe Supported Housing Ltd | Real estate | 2022 |
| Deluxeventsuk Ltd | Other services | 2025 |
| Deluxx Blinds Ltd | Wholesale & retail | 2017 |
| Delv Holdings Limited | Financial services | 2025 |
| Delving Designs Ltd | Manufacturing | 2023 |
| DEM Growth Ltd | Information & communication | 2023 |
| DEM Properties Group Ltd | Real estate | 2024 |
| DEM22TRANSPORT Ltd | Transport & logistics | 2025 |
| Dema Teheneh Interiors Ltd | Professional & scientific | 2026 |
| Demerk Limited | Wholesale & retail | 2025 |
| Demetris Theophilou Limited | Extraterritorial | 2025 |
| Demi Scaffolding Ltd | Construction | 2023 |
| Demiana Ltd | Water & waste | 2026 |
| Demiconstruct Ltd | Construction | 2026 |
| Demila Properties Limited | Construction | 2014 |
| Demon Automotive Limited | Wholesale & retail | 2006 |
| Demsun UK Ltd | Other services | 2016 |
| Demta Tech Limited | Wholesale & retail | 2024 |
| Demure Properties Ltd | Construction | 2024 |
| DEN Caney Coaches Limited | Transport & logistics | 1992 |
| Dena Pizza Ltd. | Hospitality | 2019 |
| Denakar Limited | Administrative & support | 2012 |
| Denalex Ltd | Wholesale & retail | 2014 |
| Denapaul Limited | Administrative & support | 2012 |
| Denarius International Ltd | Administrative & support | 2017 |
| Denaro Partners LLP | | 2012 |
| Denbeigh House Ltd. | Health & social care | 2016 |
| Denden Flow Ltd | Transport & logistics | 2025 |
| Denel Services Ltd | Financial services | 2020 |
| Denesha Arts & Dance Ltd | Administrative & support | 2024 |
| Denford Commercial Ltd | Wholesale & retail | 2026 |
| Denford Motors Ltd | Wholesale & retail | 2025 |
| Dengate Capital Limited | Financial services | 2022 |
| Denim HUT Ltd | Wholesale & retail | 2019 |
| Denim Wear Limited | Manufacturing | 2020 |
| Denis Construction MD Ltd | Construction | 2026 |
| Denis Lang Ltd | Education | 2025 |
| Denis Oliver Limited | Administrative & support | 1987 |
| Denis&H Trans Ltd | Transport & logistics | 2018 |
| Denisdenis Limited | Construction | 2025 |
| Denise Fountain Limited | Education | 2024 |
| Deniz Gustavsson Creative Ltd | Professional & scientific | 2014 |
| Denka Contracts Ltd | Construction | 2022 |
| Denner Environmental Business Products Ltd | Wholesale & retail | 2022 |
| Denner-Kelford Grinding Limited | Manufacturing | 2001 |
| Dennetts Limited | Wholesale & retail | 2015 |
| Dennis Barber (Swansea) Ltd | Other services | 2020 |
| Dennis Road Clearance Ltd | Wholesale & retail | 2026 |
| Dennis Services Ltd | Transport & logistics | 2022 |
| Dennisfood Ltd | Hospitality | 2017 |
| Denny (UK) Ltd | Health & social care | 2014 |
| Denny Bros Supplies Limited | Manufacturing | 1983 |
| Denote Print Limited | Manufacturing | 2005 |
| Denpad Ltd | Wholesale & retail | 2024 |
| Denric Securities Limited | Financial services | 1964 |
| Dens of Equality | Health & social care | 2008 |
| Denset Ltd | Health & social care | 2025 |
| Denstones Limited | | 1977 |
| Dent Health Ltd | Health & social care | 2010 |
| Dent International Ltd | Health & social care | 2024 |
| Dent Pro UK Limited | Manufacturing | 2006 |
| Dent Tech - Bringing the Bodyshop to YOU Ltd | Wholesale & retail | 2012 |
| Dent'A'Claim Ltd | Other services | 2022 |
| Denta-Rain Limited | Health & social care | 2013 |
| Dentabright Ltd | Manufacturing | 2026 |
| Dentahmedical Ltd | Administrative & support | 2016 |
| Dental Advice and Education Limited | Health & social care | 2012 |
| Dental Care Partnership (Birmingham) Holdings Limited | Health & social care | 2015 |
| Dental Implants Birmingham Ltd | Health & social care | 2013 |
| Dental Management Ltd | Real estate | 2021 |
| Dental Nurse 24/7 Ltd | Other services | 2018 |
| Dentaljuce CPD Providers Limited | Education | 2010 |
| Dentana Ltd | Hospitality | 2018 |
| Dentapearl Ltd | Health & social care | 2022 |
| Dentarius Limited | Health & social care | 2013 |
| Dentavital Limited | Health & social care | 2007 |
| Dentech Laboratories Limited | Health & social care | 2009 |
| Dentek Limited | Professional & scientific | 2022 |
| Dentia UK Limited | Health & social care | 2008 |
| Dentiflo Ltd | Wholesale & retail | 2025 |
| Dentique Dental Practice Limited | Health & social care | 2017 |
| Dentis Medical Supplies Ltd | Manufacturing | 2023 |
| Dento Defender Limited | Wholesale & retail | 2023 |
| Dentography Ltd | Education | 2016 |
| Dentology Birmingham Limited | Health & social care | 2021 |
| Denton Hall Manufacturing Limited | Manufacturing | 2019 |
| Denton Materials Limited | Wholesale & retail | 2026 |
| Dentonovo Properties Limited | Real estate | 2018 |
| Denuevo Projects Ltd | Construction | 2019 |
| Denuevo Properties Limited | Real estate | 2020 |
| Denver Housing Trust Limited(The) | Construction | 1945 |
| Denver IT Tech Limited | Information & communication | 2019 |
| Deny B Ltd | Wholesale & retail | 2024 |
| Denz Properties Ltd | Real estate | 2023 |
| DEO Property Developments Limited | Construction | 2014 |