| CRB Services Limited | Construction | 2015 |
| Creative Motor Management Limited | Wholesale & retail | 1999 |
| Creativefolks Limited | Administrative & support | 2012 |
| Creatives Accounting Limited | Professional & scientific | 2022 |
| Crecy Limited | Administrative & support | 2016 |
| Crest Country Retreats Limited | Hospitality | 2021 |
| Crestway Construction Ltd | Construction | 2023 |
| Crinex Housing Ltd | Real estate | 2025 |
| Crissie Limited | Administrative & support | 2021 |
| Critical Care Consulting Partners LLP | | 2016 |
| Critical Insight Events Ltd | Administrative & support | 2026 |
| Croftdown Properties Limited | Real estate | 2006 |
| Crown Christian Heritage Trust | Other services | 2011 |
| Crusader Games Ltd | Extraterritorial | 2022 |
| Crypto Asset Tax Advisory Services Limited | Administrative & support | 2003 |
| Crystal Image & Vision Ltd | Professional & scientific | 2015 |
| CS Convenience Limited | Wholesale & retail | 2019 |
| Cspic Limited | Financial services | 2024 |
| CTU Security Limited | Information & communication | 2015 |
| Cubed Tax Support Limited | Professional & scientific | 2023 |
| Cudworth Estates SPV Ltd | Real estate | 2019 |
| Culross Productions Limited | Information & communication | 2021 |
| Cuphery Ltd | Wholesale & retail | 2019 |
| Cura GP Ltd | Health & social care | 2023 |
| Curation Studio Limited | Professional & scientific | 2024 |
| Curtis B Limited | Professional & scientific | 2019 |
| Customer Hub UK Limited | Extraterritorial | 2015 |
| Cutnall Green Consulting Ltd | Professional & scientific | 2019 |
| CWD Auto Limited | Wholesale & retail | 2019 |
| CWH Enterprises Ltd | Manufacturing | 2016 |
| Cyber Media Ltd | Information & communication | 2011 |
| Cybertrends Limited | Information & communication | 2016 |
| Cygnus Yachting Limited | Transport & logistics | 2020 |
| Cyturjacobe Ltd | Administrative & support | 2020 |
| D & J Boiler Services Ltd | Construction | 2024 |
| D and J Builders and Electrical Services Limited | Construction | 2025 |
| D G Consultancies Limited | Professional & scientific | 2008 |
| D J Hemming Heating & Plumbing Ltd | Construction | 2026 |
| D J Signs Limited | Construction | 2013 |
| D L Chester Limited | Health & social care | 2016 |
| D L Consultations Ltd | Health & social care | 2021 |
| D Thomas Property Limited | Real estate | 2022 |
| D&C Holdings (Midlands) Ltd | Construction | 2021 |
| D&E Building Ltd | Real estate | 2018 |
| D.Dennison Decorating Limited | Construction | 2005 |
| D.P.S. Farriery Limited | Agriculture & fishing | 2002 |
| D.R.F.C. Limited | Arts & recreation | 1998 |
| D.V.T. (Worcester) Limited | Real estate | 2025 |
| Daccus Limited | Manufacturing | 2014 |
| Dactyl Ltd | Professional & scientific | 2024 |
| Dalc Property Limited | Real estate | 2021 |
| Dancepro Academy Limited | Arts & recreation | 2017 |
| Dandy Influencer Agency Ltd | Professional & scientific | 2026 |
| Dani's Car Wash Ltd | Other services | 2024 |
| Danny Cheung Ltd | Health & social care | 2021 |
| Dark Arts Ltd | Information & communication | 2021 |
| Dark Halo Design Limited | Information & communication | 2000 |
| Datum Hub Ltd | Arts & recreation | 2024 |
| Datum Production Solutions Limited | Arts & recreation | 2023 |
| Daverson Carpentry Ltd | Manufacturing | 2018 |
| David Whitehead Software Solutions Ltd. | Information & communication | 1995 |
| Davis Ferry Limited | Professional & scientific | 2006 |
| Dawn Powick Limited | Administrative & support | 2014 |
| Daybreakers Evesham Ltd | Health & social care | 2026 |
| Daybreakers Ltd | Health & social care | 2010 |
| Dazzling Ovens Ltd | Administrative & support | 2021 |
| DB Bloodstock Ltd | Agriculture & fishing | 2020 |
| DB Property Facilities Management Limited | Professional & scientific | 1993 |
| DC QS Management Ltd | Professional & scientific | 2014 |
| DC Quality Ltd | Professional & scientific | 2017 |
| DCI Developments Limited | Construction | 2006 |
| Dcir Holdings Limited | Administrative & support | 2021 |
| Decade Construction Limited | Construction | 2021 |
| Decade Group Limited | Administrative & support | 2012 |
| Decomyn Art Limited | Arts & recreation | 2026 |
| Definitive Wealth Limited | Education | 2024 |
| Degu Pictures Ltd | Information & communication | 2025 |
| Deka Klay Consulting Ltd | Professional & scientific | 2024 |
| Deliciae Design & Build Limited | Construction | 2018 |
| Deliciously Squared Ltd | Hospitality | 2014 |
| Dentline PDR Ltd | Wholesale & retail | 2024 |
| Derek Connolly Ltd | Health & social care | 2024 |
| Derek J Brice Building & Landscaping Limited | Administrative & support | 2011 |
| Dermatology Specialist Care Ltd | Health & social care | 2019 |
| Design Build & Development Ltd | Professional & scientific | 2013 |
| Design Tech Solutions Consulting Ltd | Professional & scientific | 2024 |
| Destock FCL UK Limited | Transport & logistics | 2021 |
| Destrier Pro Historical Events Limited | Administrative & support | 2010 |
| Develop Grow Limited | Professional & scientific | 2012 |
| Devrajzy Ltd | Transport & logistics | 2023 |
| DF Giving Back Community Interest Company | Professional & scientific | 2024 |
| Diamond Home Improvements (Droitwich) Limited | Administrative & support | 1996 |
| Diamond Oak Limited | Manufacturing | 2026 |
| Diamond Windows (Droitwich) Limited | Administrative & support | 2005 |
| Diamond Windows Holdings Limited | Financial services | 2017 |
| DIB Business Solutions Ltd | Professional & scientific | 2019 |
| Digbys Drinks Limited | Hospitality | 2025 |
| Dipton Ltd | Administrative & support | 2021 |
| Direct Outreach Limited | Professional & scientific | 2023 |
| Directech QM Systems Limited | Professional & scientific | 2024 |