| Dominion Office Supplies Ltd | Wholesale & retail | 2019 |
| DON AVI Property Investment Ltd | Real estate | 2019 |
| DON Singh Promotions Limited | Arts & recreation | 2016 |
| Donnelly Contracts Limited | Construction | 2000 |
| Donnelly Plant Hire Ltd | Construction | 2012 |
| Dookshop UK Limited | Wholesale & retail | 2026 |
| Doran Bros (London) Limited | Construction | 1991 |
| Dorer Property Ltd | Real estate | 2026 |
| Doris Michaels Cosmetics Ltd | Manufacturing | 2003 |
| Dorothy Daba Ltd | Professional & scientific | 2017 |
| Dortec Limited | Health & social care | 2017 |
| Double R Traffic Management Limited | Other services | 2018 |
| Dourside Ltd | Real estate | 2016 |
| Doveley Air Limited | Construction | 2002 |
| Dowdall Engineering Limited | Manufacturing | 2003 |
| Doxaa Ltd. | Construction | 2015 |
| Doyle & Leigh Financial Services Limited | Financial services | 2006 |
| Doyles UK Limited | Health & social care | 2004 |
| DP Cosmetics Ltd | Wholesale & retail | 2020 |
| DP Engineering Construction Ltd | Professional & scientific | 2024 |
| DP Merron Ltd | Information & communication | 2017 |
| Dp-Pr Ltd | Professional & scientific | 2025 |
| DPA Joinery Ltd | Construction | 2023 |
| DPB Builders Ltd | Construction | 2024 |
| DPF Tiling Ltd | Construction | 2018 |
| DPM Decorating Contractors Limited | Construction | 2023 |
| DPN Tech Ltd | Information & communication | 2022 |
| DR Air CON Ltd | Energy | 2023 |
| DR Drip Bluewater Ltd | Health & social care | 2025 |
| DR Hammond Aesthetics Ltd | Health & social care | 2019 |
| DR Letting Limited | Real estate | 2009 |
| DR Mezzanine Ltd | Manufacturing | 2024 |
| DR Sipos & Janicek Ltd | Health & social care | 2015 |
| Drains Flow Ltd | Water & waste | 2019 |
| Drainscapes Ltd | Water & waste | 2026 |
| DRE the Handyman Ltd | Other services | 2023 |
| Dream Academy PA Limited | Education | 2018 |
| Dream Catcher Studio Ltd | Professional & scientific | 2023 |
| Dripology Ltd | Health & social care | 2025 |
| Driven Dreams Ltd | Wholesale & retail | 2026 |
| Driverbooks Pro Ltd | Information & communication | 2026 |
| Drivesimple Holdings Ltd | Administrative & support | 2024 |
| Driving Fanatics Club Limited | Other services | 2025 |
| DRJ Environmental Ltd | Professional & scientific | 2018 |
| Drone Media Solutions Ltd | Professional & scientific | 2025 |
| DRP Contracts Ltd | Construction | 2018 |
| DS Holdings (Rochester) Limited | Professional & scientific | 2025 |
| DS Online Coaching Ltd | Other services | 2024 |
| DS Properties (Rochester) Limited | Real estate | 2024 |
| DS Resources Ltd | Professional & scientific | 2025 |
| DSB Vehicle Repairs Ltd | Administrative & support | 2022 |
| DSN ODO Limited | Real estate | 2017 |
| DST Transport Limited | Transport & logistics | 2016 |
| Dstechtrading Limited | Wholesale & retail | 2023 |
| DT Kaster Limited | Financial services | 2022 |
| DT Project Consultancy Ltd | Professional & scientific | 2024 |
| Dulacrest Limited | Real estate | 1979 |
| Dullah Ventures Limited | Construction | 2022 |
| Duloch Real Estate Ltd | Real estate | 2022 |
| Dumwand Group Limited | Information & communication | 2015 |
| Dunn Housing Limited | Real estate | 2019 |
| Dunn's Transport Ltd | Transport & logistics | 2022 |
| Dunns Technical Services Ltd | Administrative & support | 2022 |
| Dunny BOI Ltd | Construction | 2020 |
| Duntai Property Investment Ltd | Real estate | 2022 |
| Dupsy Limited | Health & social care | 2021 |
| Duraforce Construction Ltd | Construction | 2025 |
| DV Domestic Limited | Administrative & support | 2024 |
| DVJ Investments Ltd | Hospitality | 2024 |
| DVJ Project Management Limited | Construction | 2021 |
| DWW Engineering Ltd | Administrative & support | 2023 |
| Dynamic HSE Limited | Professional & scientific | 2024 |
| Dynamics - the Medway Music Education Hub CIC | Education | 2017 |
| Dynasty Gallery 28 Ltd | Wholesale & retail | 2025 |
| Dyslexia Inc Ltd | Education | 2022 |
| DZ Properties Limited | Real estate | 2019 |
| E & H Accounts Limited | Professional & scientific | 2012 |
| E & M Lifts Ltd | Other services | 2016 |
| E & M Mobility Ltd | Other services | 2018 |
| E & Y Limited | Other services | 2023 |
| E E C Limited | Professional & scientific | 1993 |
| E J Brooks (Europe) Limited | Manufacturing | 1982 |
| E&A Haulage Ltd | Transport & logistics | 2025 |
| E&A Property Solutions Ltd | Real estate | 2022 |
| E&G Brothers Ltd | Hospitality | 2025 |
| E&Jb Property Services Ltd | Administrative & support | 2026 |
| E&Oventures Ltd | Health & social care | 2025 |
| E&P Vyse Consultants Ltd | Professional & scientific | 2017 |
| E.G.R Services Ltd | Administrative & support | 2018 |
| E.L.J Electrical Ltd | Construction | 2021 |
| E100 Club Ltd | Education | 2023 |
| E8 House Ltd | Construction | 2025 |
| EA Winful & Associates Limited | Professional & scientific | 2011 |
| Eagle House (Broadstairs) Limited | Households | 2006 |
| Eagle House Express Ltd | Wholesale & retail | 2011 |
| Eagle's Eyes Limited | Professional & scientific | 2014 |
| Eagles Nest Foundation | Other services | 2010 |
| East Croydon Window Cleaning Limited | Administrative & support | 2015 |
| East Flooring Ltd | Construction | 2026 |
| East Kent Window Cleaning Limited | Administrative & support | 2014 |