| D & D Acquisitions Ltd | Real estate | 2011 |
| D & M Structures Ltd | Construction | 2021 |
| D a Lawson Plastering Contractor Ltd | Construction | 2013 |
| D Ashmore & Daughter Ltd | Construction | 2013 |
| D B Software Associates Limited | Information & communication | 2007 |
| D B Valeting (2025) Limited | Administrative & support | 2025 |
| D B Wood Limited | Financial services | 2001 |
| D Best Solutions Limited | Information & communication | 2024 |
| D Govier Plumbing & Heating Limited | Construction | 2015 |
| D J Swallow Brickwork Limited | Construction | 2013 |
| D J Swallow Construction Limited | Construction | 1998 |
| D J Swallow Holdings Limited | Financial services | 2013 |
| D K Interim Limited | Professional & scientific | 2016 |
| D L Rogers & Sons Limited | Transport & logistics | 2000 |
| D P Football Academy Ltd | Education | 2021 |
| D P Football School Ltd | Education | 2019 |
| D&D Motors Ltd | Wholesale & retail | 2022 |
| D&G Riggott Limited | Real estate | 2019 |
| D&S Window & Door Installations Limited | Construction | 2025 |
| D'Arcy Services Ltd | Information & communication | 2024 |
| D'Court Limited | Real estate | 2001 |
| D-Unit Limited | Professional & scientific | 2019 |
| D.A.T. Blundy (Farmers) Limited | Agriculture & fishing | 2002 |
| D.C.Moss Consulting Ltd | Professional & scientific | 2024 |
| D.F. Furniture Limited | Manufacturing | 1999 |
| D.J.B. Model Engineering Limited | Manufacturing | 2004 |
| D.M. Fabrications Limited | Manufacturing | 2004 |
| D.Mitchell Holdings Ltd | Financial services | 2023 |
| D.N.Hyde-Barker (Agents) Limited | Real estate | 1948 |
| D.N.Z Limited | Construction | 2006 |
| Daisy Farm Ltd | Agriculture & fishing | 2021 |
| Dale Marshall Consulting Limited | Professional & scientific | 2025 |
| Dalit Goods Co Ltd | Wholesale & retail | 2018 |
| Damatech Holdings Limited | Financial services | 2017 |
| DAN Car Detailing Limited | Wholesale & retail | 2022 |
| DAN Ispas Ltd | Transport & logistics | 2024 |
| Dana Home Furnishing Ltd | Wholesale & retail | 2018 |
| Dance Vision Company Limited | Arts & recreation | 2026 |
| Dandy Pubs Ltd | Hospitality | 2024 |
| Danemka Property Ltd | Real estate | 2020 |
| Dangle Tech Ltd | Arts & recreation | 2025 |
| Daniela Spataru Ltd | Transport & logistics | 2022 |
| Daniela Sylvia Ltd | Health & social care | 2019 |
| Dann Developments Ltd | Information & communication | 2018 |
| Danny Powell Logistics Limited | Transport & logistics | 2017 |
| Darlton Gliding Club Ltd | Arts & recreation | 2007 |
| DARREN5 Ltd | Transport & logistics | 2016 |
| Dataseal Limited | Professional & scientific | 2008 |
| David Boyd Associates Limited | Professional & scientific | 2007 |
| David Dakin Architects Limited | Professional & scientific | 2015 |
| David Dodds Limited | Real estate | 2010 |
| David Fowkes Jewellery Limited | Manufacturing | 2011 |
| David Hoskins Ltd | Information & communication | 2018 |
| David Mann Plumbing and Heating Ltd | Construction | 2016 |
| Davison's Bakery Ltd | Manufacturing | 2022 |
| Dawkins ACR LLP | | 2007 |
| Dawkins Capital Limited | Real estate | 2007 |
| Daybrook Holdings Limited | Real estate | 1998 |
| Daybrook Limited | Real estate | 1904 |
| DB Chauffeur Services Limited | Transport & logistics | 2018 |
| DB Diagnostics Ltd | Wholesale & retail | 2021 |
| DB Notts Limited | Hospitality | 2026 |
| Dbagda Traders Ltd | Construction | 2026 |
| Dbontek Limited | Information & communication | 2016 |
| DBT Management Ltd | Other services | 2023 |
| DCA Food Compliance Ltd | Professional & scientific | 2026 |
| DCL Business Services Limited | Professional & scientific | 2010 |
| DCR Electrical Limited | Manufacturing | 2009 |
| DCS Cleaning Contractors Ltd | Administrative & support | 2020 |
| Ddcatering Ltd | Hospitality | 2024 |
| DE LA Harpe & Co Limited | Manufacturing | 2020 |
| DE Varde Limited | Extraterritorial | 2017 |
| Debs Bream Limited | Information & communication | 2018 |
| DEC Developments Ltd | Real estate | 2015 |
| Deck Solutions Ltd | Manufacturing | 2025 |
| DEE Homes Limited | Construction | 2020 |
| Deerdale Lodge Ltd | Hospitality | 2016 |
| Default Blue Limited | Administrative & support | 2001 |
| Deforma Ltd | Professional & scientific | 2018 |
| Deincourt Limited | Administrative & support | 2001 |
| Delicks Global Limited | Information & communication | 2025 |
| DELIVER4YOU Ltd | Transport & logistics | 2020 |
| Dellamix Concrete Limited | Wholesale & retail | 1998 |
| DELTAEVO201 Limited | Administrative & support | 2023 |
| Denmar Property Developments Ltd | Construction | 2014 |
| Denplus Ltd | Health & social care | 2022 |
| Dent's I.T Services Limited | Information & communication | 2023 |
| Dent-Kiss Limited | Health & social care | 2016 |
| Denti-Med Limited | Other services | 2017 |
| Denton Retailer Systems Limited | Information & communication | 1998 |
| Denys Management Limited | Professional & scientific | 2021 |
| Derby Nail Academy Limited | Other services | 2015 |
| Derry Building Services Limited | Construction | 1980 |
| Derry Limited | Construction | 2002 |
| DES Holden Ltd | Construction | 2012 |
| Deshi Kitchen Express Ltd | Hospitality | 2026 |
| Deshi Kitchen Takeaway Ltd | Hospitality | 2023 |
| Desmark Ltd | Health & social care | 2014 |
| Devos & Co Accountants Ltd | Professional & scientific | 2010 |
| DGC OIL & GAS Ltd | Mining & quarrying | 2020 |