| D.P.D. Holdings Ltd | Real estate | 2020 |
| D.T.V.A. Ltd. | Other services | 1996 |
| D.Watt Roadways Limited | Construction | 1996 |
| D2 Marine Solutions Ltd | Wholesale & retail | 2017 |
| D21KUS Limited | Transport & logistics | 2024 |
| D2DC Consulting Ltd | Professional & scientific | 2025 |
| D2LUKO Ltd | Transport & logistics | 2025 |
| Daay Properties Ltd | Real estate | 2020 |
| Dadu Holdings Ltd | Construction | 2016 |
| Dady & Wilde Limited | Real estate | 2021 |
| Daily DROP99 Limited | Wholesale & retail | 2026 |
| Daily Fresh Bedford Limited | Wholesale & retail | 2023 |
| Daily Fresh Silver Street Limited | Wholesale & retail | 2025 |
| Daily Locums Ltd | Health & social care | 2018 |
| Daily MAX Accessories Ltd | Wholesale & retail | 2015 |
| Dainty's Fast Food Ltd | Hospitality | 2024 |
| Daisy First AID Peterborough Ltd | Education | 2025 |
| Daizle Limited | Professional & scientific | 2021 |
| Daje Traders Ltd | Wholesale & retail | 2023 |
| Dajos Holdings Limited | Financial services | 2019 |
| Daka Marketing Ltd | Manufacturing | 2023 |
| Daks Foods Limited | Hospitality | 2023 |
| DAL Pest Solutions Limited | Administrative & support | 2017 |
| Dal-Rod Services LP | | 2011 |
| Dalbergia Group Holdings Limited | Financial services | 2025 |
| Dale Road Residents Company Limited | Households | 2001 |
| Daleks Powder Coating Ltd | Manufacturing | 2022 |
| Dalmark Grain Limited | Extraterritorial | 1976 |
| Damani's Company Limited | Real estate | 2014 |
| Damany Medical Limited | Health & social care | 2018 |
| Damany Reports Limited | Health & social care | 2022 |
| Damian Tomala Ltd | Transport & logistics | 2025 |
| Damon Housing V.E Ltd | Real estate | 2026 |
| Damore Contracting Ltd | Transport & logistics | 2025 |
| DAN Batrinac Limited | Transport & logistics | 2014 |
| DAN Gilbert Coaching Ltd | Arts & recreation | 2021 |
| DAN Green IT Solutions Ltd | Information & communication | 2018 |
| DAN Rizea Ltd | Transport & logistics | 2018 |
| DAN Waters Creative Ltd | Professional & scientific | 2023 |
| Dan&Sby Ltd | Administrative & support | 2025 |
| Dan's Direct Delivery Ltd | Transport & logistics | 2019 |
| Dana FD Limited | Real estate | 2025 |
| Danbey Limited | Wholesale & retail | 2019 |
| Dancy Holdings Ltd | Financial services | 2025 |
| Dandais Care Limited | Health & social care | 2019 |
| Dandeta Ltd | Transport & logistics | 2018 |
| Dandrea Ltd | Professional & scientific | 2026 |
| Danells Off-Road Ltd | Manufacturing | 2024 |
| Danex Properties Limited | Real estate | 2018 |
| Dangelos Restaurant Ltd | Hospitality | 2026 |
| Daniel Bradley Limited | Wholesale & retail | 2015 |
| Daniel Firmin and Co Ltd | Real estate | 2026 |
| Daniel Turner Marine and Forestry Ltd | Agriculture & fishing | 2013 |
| Daniel Wade Ltd | Wholesale & retail | 2022 |
| Danish Tanzeel Construction Ltd | Construction | 2026 |
| Dankan Mini Shop Limited | Wholesale & retail | 2012 |
| Danky Solutions Limited | Professional & scientific | 2023 |
| Dannii B’S Aesthetics Ltd | Other services | 2024 |
| Dannys Pizza Ltd. | Hospitality | 2017 |
| Dannysin Ltd | Wholesale & retail | 2026 |
| Danobat Limited | Manufacturing | 2003 |
| Dansk Properties Ltd | Real estate | 2026 |
| Dany & GEO Trans Ltd | Transport & logistics | 2014 |
| Dany Spedition Ltd | Transport & logistics | 2014 |
| Danykau Limited | Wholesale & retail | 2025 |
| Danythanyu Ltd | Transport & logistics | 2025 |
| Danzen Holdings Ltd | Financial services | 2025 |
| Danzen Logistics Ltd | Transport & logistics | 2021 |
| Dappstacks Ltd | Information & communication | 2025 |
| DAR Car Sales Ltd | Wholesale & retail | 2026 |
| DAR Carpentry Limited | Construction | 2015 |
| DAR Niebios Ltd | Transport & logistics | 2017 |
| DAR R2R Ltd | Real estate | 2025 |
| Darbuild Innovation Ltd | Construction | 2024 |
| Darcyivy Ltd | Health & social care | 2023 |
| Darius & ANA Limited | Transport & logistics | 2017 |
| Darius & Selena Logistics Ltd | Transport & logistics | 2025 |
| Darius Couriers Ltd | Transport & logistics | 2018 |
| Darius Logistic Ltd | Construction | 2014 |
| Darius Rasimas Limited | Transport & logistics | 2011 |
| Darius Services Ltd | Transport & logistics | 2025 |
| Darius-Uk Limited | Transport & logistics | 2012 |
| Dariusz Wypuszcz Ltd | Transport & logistics | 2017 |
| Dark Clover Haulage Ltd | Transport & logistics | 2019 |
| Dark Green Kitchens Ltd | Administrative & support | 2021 |
| Darkage Watches Ltd | Manufacturing | 2025 |
| Darkblue Technology Limited | Information & communication | 2025 |
| Darke Engineering Limited | Construction | 2010 |
| Darke Tech Ltd | Construction | 1994 |
| Darlow Bespoke Joinery Ltd | Manufacturing | 2018 |
| Daro Trans Dariusz Cecot Limited | Transport & logistics | 2015 |
| Daron Grant Transport Ltd | Transport & logistics | 2025 |
| DARPOL4YOU Ltd | Construction | 2020 |
| Darren Buxton-Smith Limited | Health & social care | 2015 |
| Darsul Ltd | Administrative & support | 2018 |
| Dart Transportation Ltd | Transport & logistics | 2018 |
| Dartnet Limited | Professional & scientific | 2025 |
| Darts Factory Ltd | Arts & recreation | 2023 |
| Darts World Group Ltd | Professional & scientific | 2024 |
| Darts World Ltd | Professional & scientific | 2024 |