| Crosdale Freelance Services Ltd | Manufacturing | 2025 |
| Crosdale Homes Ltd | Real estate | 2026 |
| Crosshair Holdings Limited | Financial services | 2024 |
| Croupdend Ltd | Transport & logistics | 2024 |
| Crowe's Carpentry Limited | Manufacturing | 2021 |
| Crown House Developments (England) Limited | Construction | 2021 |
| Crown Lofts Communal Heating Limited | Households | 2024 |
| Crown Lofts GS RTM Company Limited | Households | 2024 |
| Crown Pizza & Bites Ltd | Hospitality | 2026 |
| Crown Power Energy Systems Ltd | Manufacturing | 2024 |
| Crown Shield Security Limited | Administrative & support | 2025 |
| Crowned Care Limited | Health & social care | 2023 |
| Crowthnook Ltd | Administrative & support | 2024 |
| Crowton’S Delivery Services Ltd | Transport & logistics | 2026 |
| Croxperts Limited | Information & communication | 2025 |
| CRS (Coventry) Limited | Wholesale & retail | 2009 |
| Crulich Ltd | Transport & logistics | 2024 |
| Crunchy Grill & Pizza Point Ltd | Hospitality | 2026 |
| Crusade Computer Solutions Limited | Information & communication | 1999 |
| Crusty Grill Ltd | Hospitality | 2025 |
| Crusty Pizza Ltd | Hospitality | 2024 |
| CRW Estates Ltd | Real estate | 2025 |
| CRX Rail Ltd | Construction | 2019 |
| Crypt Ltd | Wholesale & retail | 2025 |
| CRYPT2 Ltd | Wholesale & retail | 2025 |
| Cryscont Ltd | Wholesale & retail | 2022 |
| Crystal Deep Cleaning Ltd | Administrative & support | 2019 |
| Crystal Elegance Cleaning Ltd | Administrative & support | 2025 |
| Crystal Treasure and Handicrafts Limited | Manufacturing | 2023 |
| CRYSTAL25 Ltd | Wholesale & retail | 2025 |
| CS Leathercraft Limited | Manufacturing | 2020 |
| CS Security & K9 Ltd | Administrative & support | 2020 |
| CS Solutions (Midlands) Limited | Professional & scientific | 2024 |
| CSC Legal Consulting Ltd | Professional & scientific | 2020 |
| Csdrv Ltd | Transport & logistics | 2025 |
| Cshare Ltd | Wholesale & retail | 2025 |
| CSK Manufacturing Limited | Manufacturing | 2025 |
| CSM Lighting Ltd | Professional & scientific | 2010 |
| Csquad Learning Ltd | Education | 2025 |
| Cssn Limited | Information & communication | 2014 |
| CST Pharma Holdings Limited | Financial services | 2026 |
| Csuka Painting Limited | Construction | 2025 |
| CT Elec Ltd | Construction | 2026 |
| CTC Traders Limited | Education | 2019 |
| Ctrl Academy Ltd | Education | 2026 |
| Ctrl Products Co Ltd | Wholesale & retail | 2026 |
| CU Soon Ltd | Wholesale & retail | 2025 |
| Cuckoo Lane Farm Ltd | Financial services | 2008 |
| Cuecard Agency Ltd | Information & communication | 2017 |
| Cuenzan Ltd | Administrative & support | 2024 |
| Culwood Solutions Ltd | Wholesale & retail | 2024 |
| Cuppa Chaii (Moseley Village Birmingham) Ltd | Hospitality | 2024 |
| Cups'N'Cakes Desserts Ltd | Wholesale & retail | 2026 |
| Curagenix Life Sciences Limited | Wholesale & retail | 2023 |
| Curamus Haven Ltd | Health & social care | 2022 |
| Curate Clothing Limited | Wholesale & retail | 2020 |
| Curavanta Healthcare Ltd | Health & social care | 2026 |
| Curehub Limited | Administrative & support | 2022 |
| Curo Hotels (West Campbell) Limited | Hospitality | 2013 |
| Curt & Co. Properties Limited | Real estate | 2018 |
| Cushhcustoms Ltd | Wholesale & retail | 2025 |
| Cushty Competitions Limited | Other services | 2021 |
| Cushverf Ltd | Transport & logistics | 2024 |
| Cuspids Limited | Health & social care | 2014 |
| Custom Automotive Spares UK Limited | Extraterritorial | 2013 |
| Custom Climbing International Ltd | Wholesale & retail | 2024 |
| Custom Designs Project Ltd | Wholesale & retail | 2024 |
| Custom Saddlery Ltd | Manufacturing | 2014 |
| Cute Curves Ltd | Wholesale & retail | 2018 |
| Cutish Ltd | Wholesale & retail | 2025 |
| Cutting Edge (Ottery) Ltd | Other services | 2008 |
| CW Housing Ltd | Real estate | 2015 |
| CW Transportation Ltd | Transport & logistics | 2024 |
| Cyber Ecom Limited | Wholesale & retail | 2024 |
| Cyber Tech Services Midlands Ltd | Manufacturing | 2014 |
| Cyberdefend Limited | Information & communication | 2026 |
| Cyl-Liners Limited | Wholesale & retail | 1975 |
| Cyrils Tearoom Ltd | Hospitality | 2022 |
| D & a Leisure Limited | Arts & recreation | 2002 |
| D & D Roofing and Cladding Services Limited | Construction | 2015 |
| D & F Spark Ltd | Construction | 2024 |
| D & G Electrical Services Limited | Construction | 2002 |
| D & G Maintenance Contracts Ltd | Administrative & support | 2011 |
| D & H Catering Ltd | Hospitality | 2025 |
| D & J Services (UK) Ltd | Construction | 2007 |
| D & K Cleaning Ltd | Administrative & support | 2024 |
| D & L Parker Limited | Wholesale & retail | 2002 |
| D & R Contract Services Limited | Construction | 1991 |
| D & S Investment Group Limited | Construction | 2026 |
| D Aldridge Ltd | Hospitality | 2026 |
| D and C Roofing & Cladding West Midlands Ltd | Construction | 2024 |
| D Broughton Retail Limited | Wholesale & retail | 2024 |
| D G Williams Transport Services Limited | Transport & logistics | 2016 |
| D H Windows Ltd | Construction | 2015 |
| D I Kitchen Sales Limited | Wholesale & retail | 2023 |
| D K Developers Ltd | Real estate | 2021 |
| D L K Services Ltd | Professional & scientific | 2025 |
| D L Rendering Ltd | Construction | 2024 |
| D M Investments Limited | Real estate | 2001 |
| D Mataras Limited | Health & social care | 2012 |