| Crownsoft Ltd | Information & communication | 2026 |
| CRP Interiors Limited | Construction | 2010 |
| Crucial Car Care Ltd | Wholesale & retail | 2024 |
| Crudgington Accountancy Services Limited | Professional & scientific | 2015 |
| Crudgington Business Services Limited | Professional & scientific | 2011 |
| Crypto Store Ltd | Financial services | 2020 |
| Crystal Cavern Ltd | Wholesale & retail | 2026 |
| Crystal Mind Admin Ltd | Real estate | 2025 |
| Crystal Windows Ltd | Wholesale & retail | 2020 |
| Crystaldrifter Ltd | Wholesale & retail | 2018 |
| Crystalize Limited | Wholesale & retail | 2024 |
| Crystals Consult Limited | Professional & scientific | 2021 |
| CS Racing Limited | Other services | 2017 |
| CSB T/A Chopshop (Madeley) Ltd | Other services | 2023 |
| CSB T/A Chopshop (Wellington) Ltd | Other services | 2023 |
| CSB T/A Chopshop Ltd | Other services | 2016 |
| CSB T/A NO White Bits Ltd | Other services | 2019 |
| CSJ Building Ltd | Construction | 2025 |
| CSJ Retail PVT Limited | Wholesale & retail | 2023 |
| CSL T/A the Powder Coaters Ltd | Manufacturing | 2019 |
| CSP Property Solutions Ltd | Financial services | 2025 |
| CSR Leisure Limited | Arts & recreation | 2015 |
| CSW Support Ltd | Administrative & support | 2026 |
| Csws Housing Ltd | Hospitality | 2026 |
| CT Holdings & Investments Ltd | Financial services | 2026 |
| CT Landscapes and Driveways Ltd | Administrative & support | 2024 |
| CT Landscapes Holdings & Investments Ltd | Financial services | 2024 |
| CT Motor Services Ltd | Wholesale & retail | 2017 |
| CT Outdoor Solutions Ltd | Administrative & support | 2026 |
| Ctjays Ltd | Health & social care | 2015 |
| Ctps - ERP Consulting, Training & Project Services Ltd. | Extraterritorial | 2016 |
| CTS Dudley Limited | Information & communication | 2014 |
| CTS Therapy Solution Ltd | Health & social care | 2024 |
| Cuanbe Media Limited | Professional & scientific | 2025 |
| Cucumber Communications Ltd | Professional & scientific | 2017 |
| Cucumber PR Holdings Ltd | Financial services | 2020 |
| Cucumber PR Ltd | Professional & scientific | 2013 |
| Cucumber Properties Ltd | Real estate | 2024 |
| Cullis Holdings and Investments Ltd | Financial services | 2023 |
| Cura Homes Limited | Health & social care | 2026 |
| Currytakeout Ltd | Hospitality | 2019 |
| Custom Roll Design Limited | Professional & scientific | 2025 |
| Custom Transporters Ltd | Wholesale & retail | 2017 |
| CUT Above ARB Ltd | Construction | 2021 |
| Cutting Edge Creative (Crafts) Ltd | Wholesale & retail | 2024 |
| Cutting Edge Financial Planning Limited | Financial services | 2012 |
| CWC Corp Ltd | Construction | 2024 |
| Cwdw Holdings Limited | Financial services | 2024 |
| Cyanotec Limited | Wholesale & retail | 2002 |
| Cyberbeacon Ltd | Information & communication | 2023 |
| Cybernest Labs Limited | Information & communication | 2023 |
| Cypnia Lettings Limited | Real estate | 2017 |
| Cyrice Ltd | Health & social care | 2022 |
| Cyrus Urban Group Ltd | Construction | 2026 |
| D & a Electrical Installations Limited | Construction | 2022 |
| D & C Plastics Ltd | Wholesale & retail | 2018 |
| D & D Driveways Limited | Construction | 2022 |
| D & K Trading (Midlands) Limited | Wholesale & retail | 2003 |
| D a Technologie Limited | Manufacturing | 2009 |
| D Aston Contracting Ltd | Construction | 2013 |
| D C Properties (Midlands) Ltd | Other services | 2009 |
| D Dawson Housing Ltd | Real estate | 2022 |
| D H Electrical and GAS Limited | Other services | 2021 |
| D Hartland Limited | Other services | 2026 |
| D J Cullen (Builders) Ltd | Construction | 2012 |
| D J Developments Construction Ltd | Construction | 2025 |
| D J Developments Holdings Ltd | Financial services | 2025 |
| D Johnson Technical Services Limited | Professional & scientific | 2017 |
| D Kane Utilities Ltd | Construction | 2017 |
| D Lister Tiling Ltd | Construction | 2018 |
| D R Heating & GAS Services Ltd | Construction | 2018 |
| D T Barber Ltd | Other services | 2025 |
| D V Holdings & Investments Ltd | Financial services | 2025 |
| D&D Homes Ltd | Manufacturing | 2023 |
| D&N Ducting Ltd | Administrative & support | 2026 |
| D&S Barnard Construction Ltd | Construction | 2026 |
| D&T Wholesalers Ltd | Wholesale & retail | 2025 |
| D-Cube Restobar Limited | Hospitality | 2024 |
| D.E.H. Fixing & Glazing Limited | Construction | 1997 |
| D.Foulkes Accountancy Ltd | Professional & scientific | 2026 |
| D.S Site Solutions Ltd | Professional & scientific | 2025 |
| D.S.M Lawn Care Limited | Administrative & support | 2010 |
| D.T. Ruston Associated Properties Limited | Real estate | 1978 |
| D.Transport Limited | Transport & logistics | 2018 |
| D.W. Windows Group Limited | Financial services | 2024 |
| D2 Nails & Spa Limited | Other services | 2026 |
| D2P (Stourbridge) Limited | Manufacturing | 2018 |
| DA Baldwin and SON Limited | Water & waste | 2024 |
| DA Global Edition Ltd | Wholesale & retail | 2025 |
| DA Tradesmith Ltd | Wholesale & retail | 2014 |
| Daataa Limited | Wholesale & retail | 2013 |
| Dads Homes Ltd | Real estate | 2024 |
| DAF Property Holdings Ltd | Real estate | 2025 |
| Daily FIX Catering Services Ltd | Manufacturing | 2021 |
| Daisy-Mae Gifts and Treasures Ltd | Wholesale & retail | 2025 |
| Dakin Custom Audio Limited | Manufacturing | 2021 |
| Dalion Engineering Limited | Financial services | 2007 |
| DAN GAS Service Limited | Construction | 2026 |
| DAN Property Holdings Limited | Real estate | 2024 |
| DAN Slee C2 Ltd | Professional & scientific | 2013 |