| D & G Management Consultants Limited | Professional & scientific | 2003 |
| D Bragg Financial Solutions Ltd | Financial services | 2020 |
| D H Design Consultants Limited | Administrative & support | 2006 |
| D J Trevillion Limited | Construction | 2006 |
| D O'Dowd Limited | Construction | 2022 |
| D&A Home Developments Ltd | Financial services | 2025 |
| D&D Stone Design Ltd | Construction | 2025 |
| D&L Electrical Ltd | Construction | 2025 |
| D&R Property Development Services Ltd | Construction | 2020 |
| D&T Management Ltd | Real estate | 2018 |
| D. Ruddle Limited | Financial services | 2008 |
| D. Simmonds Limited | Financial services | 2008 |
| D.H.D.L Plumbing & Heating Ltd | Construction | 2018 |
| D5 Services Ltd | Construction | 2021 |
| Daddicool Limited | Energy | 2015 |
| Daddy Cool Mobile Catering Limited | Hospitality | 2018 |
| Daffodils and Dreams Limited | Wholesale & retail | 2020 |
| Dafields Global Concept Ltd | Wholesale & retail | 2023 |
| Daisy DO Events Ltd | Other services | 2023 |
| DAN ENT Ltd | Administrative & support | 2017 |
| Danari Enterprise Limited | Information & communication | 2012 |
| Danari IT Services Limited | Information & communication | 2019 |
| Danari Property Services Ltd | Real estate | 2018 |
| Danixa Ltd | Information & communication | 2011 |
| Danson Healthcare Ltd | Health & social care | 2024 |
| Danson Sports Nutrition Team Ltd | Hospitality | 2024 |
| Darent Industrial Park Estate (2002) Limited | Other services | 2002 |
| Darktenoc Limited | Wholesale & retail | 2019 |
| Darrylusherelectrics Ltd | Construction | 2015 |
| Dartel Design Ltd | Professional & scientific | 2011 |
| Dartmouth Investments Limited | Real estate | 2022 |
| DAS Analytics & Consultancy Ltd | Extraterritorial | 2022 |
| Datavance Advisory Limited | Information & communication | 2026 |
| Dave Krupa Ltd | Wholesale & retail | 2002 |
| Dawn Does Care Ltd | Health & social care | 2025 |
| Dawson Refurbishments Limited | Construction | 2012 |
| Dawson School of Performing Arts Ltd | Arts & recreation | 2021 |
| DBM Consultancy Ltd | Professional & scientific | 2018 |
| DBS Staircases Limited | Construction | 2005 |
| DCL Consulting Engineers Ltd | Construction | 1999 |
| Dean Turner Taxis Ltd | Transport & logistics | 2026 |
| Decoding Art Ltd | Wholesale & retail | 2021 |
| Dedicated Services Ltd | Health & social care | 2022 |
| Deep Dive Charter Limited | Administrative & support | 2023 |
| Degroberts Properties Ltd | Real estate | 2023 |
| Deholjob Limited | Wholesale & retail | 2003 |
| Delphin Limited | Professional & scientific | 2017 |
| Demon Freight Limited | Transport & logistics | 2018 |
| Denners Yeovil Limited | Real estate | 2009 |
| Desi Accountant Limited | Professional & scientific | 2016 |
| Designhawk Limited | Professional & scientific | 2023 |
| Destinak Limited | Hospitality | 2017 |
| Dewpond Developments Limited | Construction | 2013 |
| DG BCS Limited | Construction | 2019 |
| DG Develop Ltd | Construction | 2021 |
| DGG Building Ltd | Construction | 2022 |
| Dhillon Projects Limited | Professional & scientific | 2009 |
| Dhillons Developments Ltd | Real estate | 2025 |
| Dhooper BCJ Ltd | Construction | 2024 |
| Di&So Ltd | Transport & logistics | 2021 |
| Dida Investment Properties Ltd | Real estate | 2021 |
| Difficult Name Design Ltd | Professional & scientific | 2024 |
| Difficult Name Limited | Extraterritorial | 2023 |
| Digitize Consultants Ltd | Professional & scientific | 2019 |
| Dimas Group Ltd | Construction | 2025 |
| Dina Luma Ltd | Information & communication | 2025 |
| Directrix Consulting Ltd | Professional & scientific | 2014 |
| Disquarded Ltd | Wholesale & retail | 2019 |
| Distinctive Financial Solutions Limited | Administrative & support | 2010 |
| DJM Professional Services Limited | Professional & scientific | 2023 |
| DK Property Lettings Limited | Households | 2021 |
| DLB Rail Solutions Limited | Construction | 2016 |
| DLP Driving Ltd | Transport & logistics | 2016 |
| Dm&S Services Ltd | Professional & scientific | 2025 |
| DMF Aneesha Properties Ltd | Real estate | 2022 |
| DMH Limited | Other services | 2017 |
| DMP Investments Limited | Real estate | 2018 |
| DMR Richtrend Limited | Real estate | 2010 |
| Dnty Recruitment Limited | Administrative & support | 2021 |
| DO IT Projects Ltd | Arts & recreation | 2023 |
| Dockedge Limited | Information & communication | 2012 |
| Dodo Living Limited | Construction | 2023 |
| Dog Great Limited | Information & communication | 2026 |
| Domeshaw (HR) Ltd | Wholesale & retail | 2012 |
| Domeshaw (MR) Limited | Extraterritorial | 2009 |
| Dominic Morris Limited | Administrative & support | 2007 |
| Donovan & Associates Limited | Professional & scientific | 2012 |
| Doodah Productions Ltd | Extraterritorial | 2009 |
| Door Install Direct Ltd | Construction | 2021 |
| Dorphin Limited | Wholesale & retail | 2025 |
| DPA Surveyors Ltd | Professional & scientific | 2022 |
| Dpfc Consultancy Limited | Professional & scientific | 2014 |
| DR Gary Moore Consulting Limited | Professional & scientific | 2018 |
| DREAM2BUILD Construction Ltd | Construction | 2026 |
| DS Connections Ltd | Administrative & support | 2013 |
| DS Procurement Management Limited | Professional & scientific | 2022 |
| DS Robb Loft Conversions Limited | Construction | 2026 |
| DS Search Ltd | Professional & scientific | 2023 |
| DSK Electrical Services Limited | Construction | 2008 |
| Dsomedia Limited | Information & communication | 2013 |