| Crystal Moon Solutions Ltd | Real estate | 2022 |
| Cska Kresna Limited | Transport & logistics | 2016 |
| Csystems (Hinckley) Limited | Construction | 2013 |
| Ctech Wholesale Ltd | Wholesale & retail | 2024 |
| CWB Properties Limited | Real estate | 2024 |
| Cybertext Limited | Information & communication | 2024 |
| D & a Venues Ltd | Hospitality | 2024 |
| D & H Community Support Ltd | Health & social care | 2011 |
| D & Z Groundworks Limited | Construction | 2015 |
| D Ager Developments Ltd | Construction | 2017 |
| D B Construction Design Build Ltd | Construction | 2018 |
| D B Elevators Ltd | Construction | 2010 |
| D B Houses Ltd | Real estate | 2021 |
| D E Properties Limited | Hospitality | 2003 |
| D Gunn Building Limited | Construction | 2025 |
| D J Garden Services Ltd | Administrative & support | 2016 |
| D R E Property Services Limited | Real estate | 1997 |
| D&D Moving Ltd | Transport & logistics | 2021 |
| D&J Brickwork Limited | Construction | 2017 |
| D&J Knight Ltd | Real estate | 2026 |
| D. S. Motor Services Limited | Wholesale & retail | 2002 |
| D.A.S.H Design and Measurement Services Ltd | Professional & scientific | 2026 |
| D.Allen & Sons Limited | Transport & logistics | 2022 |
| D.X.N. Brickwork Limited | Construction | 2024 |
| Dairybox Ltd | Wholesale & retail | 2019 |
| Daisy Whites Ltd | Information & communication | 2020 |
| Dalton Ventures Ltd | Hospitality | 2025 |
| Damaher Ltd | Construction | 2003 |
| Dana Transport Logistics Ltd | Transport & logistics | 2018 |
| Dance Xtra Events Ltd | Arts & recreation | 2024 |
| Dandan’S Plumbing Ltd | Construction | 2026 |
| Daniel Bradley Law Limited | Professional & scientific | 2023 |
| Daniel Hammond Carpentry & Joinery Ltd | Manufacturing | 2025 |
| Dapper Direct Ltd | Transport & logistics | 2017 |
| Darcy Park (Management Company) Limited | Households | 2010 |
| Darling Property Developments Ltd | Real estate | 2023 |
| DAS Capital Limited | Wholesale & retail | 2018 |
| DAT Electrics Limited | Manufacturing | 2022 |
| Data Energy and Climate Change Consultancy Limited | Professional & scientific | 2019 |
| Datoniq Limited | Information & communication | 2012 |
| Davenport Villas Limited | Real estate | 2011 |
| Davey SAI Muthukirupan Ltd | Real estate | 2023 |
| David Woods Ltd | Transport & logistics | 2014 |
| Davis and Partners Estate Agents Limited | Real estate | 2012 |
| DC Interiors (Midlands) Ltd | Manufacturing | 2021 |
| DC Miles Construction Ltd | Construction | 2023 |
| DCS Team Ltd | Wholesale & retail | 2018 |
| DDM Solutions Limited | Professional & scientific | 2021 |
| DDS Property Solutions Ltd | Real estate | 2018 |
| Dean Woolley Mechanical Engineers Limited | Wholesale & retail | 1997 |
| Dean Worthington Limited | Other services | 2002 |
| DEB Mitchell Healthcare Ltd | Professional & scientific | 2023 |
| Decode Your Mind Ltd | Health & social care | 2025 |
| Defc Group Ltd | Administrative & support | 2023 |
| Defosi Properties LLP | | 2024 |
| Delightfullydesserts Ltd | Hospitality | 2025 |
| Delta Business Innovations Ltd | Information & communication | 2006 |
| Delta Industrial Inspections Ltd | Professional & scientific | 2025 |
| Demandforsupply Ltd | Administrative & support | 2017 |
| Demerged Healthscreen Limited | Health & social care | 2023 |
| Derby Road (Doveridge) Resident Management Company Limited | Households | 2017 |
| Design Techniques Ltd | Manufacturing | 2001 |
| Detail Precision Engineering Limited | Manufacturing | 2003 |
| Detodi Ltd | Other services | 2026 |
| Devine Wealth Limited | Financial services | 2019 |
| Dexter Commercial Services Ltd | Professional & scientific | 2024 |
| Dgonto Limited | Information & communication | 2015 |
| DH Consulting Services Ltd | Professional & scientific | 2024 |
| DI Mediation Limited | Professional & scientific | 2017 |
| Diamond Cleaning Solutions Ltd | Administrative & support | 2026 |
| Didi Rugby Midlands Limited | Education | 2016 |
| Didi Rugby UK Limited | Professional & scientific | 2017 |
| Digicon Solutions Limited | Wholesale & retail | 2008 |
| Digirealm Trading Limited | Wholesale & retail | 2015 |
| Digisight Media Ltd | Information & communication | 2025 |
| Digital Concepts Engineering Limited | Professional & scientific | 2002 |
| Digital Force Speyside Ltd | Professional & scientific | 2025 |
| Digital SF Limited | Professional & scientific | 2019 |
| Digital Skills Development LLP | | 2019 |
| Dinarshaa Ltd | Wholesale & retail | 2025 |
| Direct Horizons Limited | Extraterritorial | 2025 |
| Direct Signs (UK) Limited | Manufacturing | 1998 |
| Ditchfield Services Limited | Other services | 2025 |
| Divine Tripple R Ltd | Health & social care | 2022 |
| DJ Naik Consultancy Services Limited | Professional & scientific | 2025 |
| Dj's Indoor Golf Limited | Administrative & support | 2024 |
| Djento Limited | Transport & logistics | 2020 |
| DJV CAD Services Ltd | Professional & scientific | 2019 |
| Djzr Investments Limited | Real estate | 2021 |
| DK Fabricators Limited | Manufacturing | 2024 |
| Dkfm Assets Limited | Financial services | 2023 |
| Dkfm Holdings Limited | Financial services | 2023 |
| DL Estates Ltd | Real estate | 2025 |
| DM Installations & Sons Ltd | Construction | 2017 |
| DMS (Data Management ) Ltd | Manufacturing | 2012 |
| Dmvs Property Limited | Real estate | 2022 |
| DN Technical Services Limited | Manufacturing | 2005 |
| Dobry Market Ltd | Wholesale & retail | 2025 |
| Dodo Spedition Ltd | Transport & logistics | 2020 |
| Dodwells Bridge Management Company Limited | Real estate | 2019 |