| Crumpsall Unique Global Trading Company Ltd | Hospitality | 2026 |
| Crwnstays Limited | Real estate | 2026 |
| Crwys Consulting Ltd | Professional & scientific | 2021 |
| Crypto New BEE Limited | Wholesale & retail | 2025 |
| Crysolite Business Intelligence Services Ltd. | Wholesale & retail | 2014 |
| Crysolite Properties Ltd | Real estate | 2025 |
| Cryst IT Limited | Information & communication | 2019 |
| Crystal Hub Ltd | Wholesale & retail | 2026 |
| Crystalline Accounting Solutions Ltd | Professional & scientific | 2024 |
| Crystalpure Cleaning Limited | Administrative & support | 2025 |
| Crystiqjewelry Ltd | Manufacturing | 2025 |
| CS SK Automotive Ltd | Wholesale & retail | 2015 |
| CSK Consulting Limited | Wholesale & retail | 2024 |
| CTB Brickwork Ltd | Construction | 2017 |
| Ctgqc LLP | | 2018 |
| CTM Funding Limited | Professional & scientific | 2026 |
| Ctrend Ltd | Information & communication | 2026 |
| Ctrl-It Limited | Information & communication | 2009 |
| Ctrlphantom Ltd | Wholesale & retail | 2025 |
| Cuckoo Trading Hebei Co., Ltd | Extraterritorial | 2021 |
| Cuddlebug Couture Ltd | Wholesale & retail | 2024 |
| CUE the Content Ltd | Information & communication | 2026 |
| Cuentame Ltd | Information & communication | 2026 |
| CUI WEI Winners Ltd | Wholesale & retail | 2025 |
| Cui&Li Trading Ltd | Other services | 2025 |
| Culinary Shop Ltd | Wholesale & retail | 2025 |
| Cult Enterprises Ltd | Wholesale & retail | 2020 |
| Cultural Therapy CIC | Health & social care | 2024 |
| CUR TEK Ltd | Wholesale & retail | 2025 |
| Curavo Limited | Financial services | 2025 |
| Curb Appeal Clothing Ltd | Wholesale & retail | 2025 |
| Curio Cosmetics UK Co., Limited | Manufacturing | 2026 |
| Curio Studio Ltd | Information & communication | 2025 |
| Curzon Capital Limited | Professional & scientific | 1999 |
| Custom Linkage Co., Ltd | Administrative & support | 2020 |
| Customercare Hub Ltd | Professional & scientific | 2025 |
| Customized LIN Ltd | Wholesale & retail | 2024 |
| Customotop Ltd | Wholesale & retail | 2025 |
| Cutting Edge Products Group Limited | Information & communication | 2024 |
| CVG Solutions Ltd | Information & communication | 2020 |
| CWE Engineering Services Ltd | Professional & scientific | 2026 |
| Cweo Ltd | Wholesale & retail | 2025 |
| CWF Trading Limited | Construction | 2019 |
| CWI Solutions Ltd | Administrative & support | 2026 |
| Cwtouring Ltd | Administrative & support | 2026 |
| CX Chunx Ltd | Wholesale & retail | 2025 |
| CX Percent Ltd | Professional & scientific | 2020 |
| Cxcs Group Ltd | Professional & scientific | 2009 |
| Cyanus Solutions PTE Ltd | Construction | 2025 |
| Cyber Animus Limited | Health & social care | 2025 |
| Cyber Assure ME Ltd | Professional & scientific | 2025 |
| Cyber Circuit Technology Co., Ltd | Extraterritorial | 2015 |
| Cyber Force Services Ltd | Information & communication | 2021 |
| Cyber Sprouts Limited | Information & communication | 2020 |
| Cyberaione Ltd | Wholesale & retail | 2025 |
| Cyberbow Strategy Ltd | Information & communication | 2020 |
| Cyberkinetics Limited | Health & social care | 2015 |
| Cyberstone Ltd | Information & communication | 2025 |
| Cybertabs UK Ltd | Information & communication | 2019 |
| Cybinnova Ltd | Information & communication | 2020 |
| Cyborg Homes Limited | Information & communication | 2019 |
| Cybrik Ltd | Information & communication | 2026 |
| Cycleflow Ltd | Wholesale & retail | 2024 |
| Cycsoc Limited | Information & communication | 2025 |
| Cygnus (Construction & Maintenance) Limited | Construction | 2026 |
| Cypress Wuson Limited | Wholesale & retail | 2025 |
| Cypressports E-Commerce Co., Ltd | Wholesale & retail | 2023 |
| Cyvot Limited | Information & communication | 2025 |
| Czech Research Corporation Limited | Other services | 2012 |
| Czhenwei Trade Ltd | Wholesale & retail | 2025 |
| Czpet UK Ltd. | Wholesale & retail | 2025 |
| D & a Recycling Ltd | Wholesale & retail | 2024 |
| D & G Commercial Property Limited | Real estate | 2024 |
| D & G Surveying Services Limited | Real estate | 2018 |
| D D Security Services Limited | Extraterritorial | 2015 |
| D J Bedford Crop Spraying Services Limited | Agriculture & fishing | 2014 |
| D J Bentley Ltd | Information & communication | 2012 |
| D Jones Motors Limited | Manufacturing | 2013 |
| D Logistics Services Ltd | Transport & logistics | 2025 |
| D Ruixin Limited | Wholesale & retail | 2025 |
| D'Ieon Ltd | Wholesale & retail | 2025 |
| D-Digz Ltd | Real estate | 2024 |
| D-Jay Construction Services Ltd | Construction | 2024 |
| D-Squared Works Limited | Wholesale & retail | 2026 |
| D.Madhouse Ltd | Arts & recreation | 2025 |
| D.O.T. Logistics Services Ltd | Transport & logistics | 2024 |
| D.S Brand Management Co., Ltd | Administrative & support | 2021 |
| DA LAB Diamonds Ltd | Wholesale & retail | 2026 |
| DA Tong FA WEI Jian ZHU LAO WU Ltd | Wholesale & retail | 2025 |
| Dachanghang Co., Ltd | Manufacturing | 2025 |
| Dacture Education Limited | Information & communication | 2023 |
| Dada Trading Ltd | Wholesale & retail | 2025 |
| Dadehzi Ltd | Information & communication | 2025 |
| Dadi Analytics Ltd | Information & communication | 2025 |
| Dadivaluxe Beauty Limited | Wholesale & retail | 2026 |
| Dagwada Limited | Real estate | 2022 |
| Dahao Limited | Manufacturing | 2023 |
| Dahedijiazu Limited | Wholesale & retail | 2025 |
| DAI Fabo Ltd | Wholesale & retail | 2024 |
| Dailan Ltd | Wholesale & retail | 2024 |