| Crowd Wisdom Limited | Information & communication | 2025 |
| Crowdpullers (Events) Limited | Arts & recreation | 1997 |
| Crowdpullers Classics Ltd | Arts & recreation | 2023 |
| Crowdpullers Media Limited | Arts & recreation | 2015 |
| Crowgate Holdings Limited | Financial services | 2025 |
| Crown Aurum Connect Ltd | Professional & scientific | 2026 |
| Crown Aurum Ltd | Wholesale & retail | 2026 |
| Crown Autolux UK Ltd | Wholesale & retail | 2025 |
| Crown Deepclean Limited | Administrative & support | 2005 |
| Crown Finish Ltd | Construction | 2026 |
| Crown Fish & Chips Ltd | Hospitality | 2026 |
| Crown Fish Bar Nottingham Limited | Hospitality | 2025 |
| Crown Fish Ltd | Hospitality | 2020 |
| Crown Group Property Ltd | Real estate | 2023 |
| Crown Home Provements Ltd | Construction | 2024 |
| Crown Homes & Developments Ltd | Construction | 2024 |
| Crown Imperial Ltd | Education | 2020 |
| Crown Maintenance (Nottingham) Ltd | Construction | 2013 |
| Crown Paving & Fencing Limited | Construction | 2023 |
| Crown Stag Ltd | Information & communication | 2018 |
| Crown Surveillance Limited | Other services | 1989 |
| Crowned by HER Ltd | Other services | 2023 |
| Crownford College Limited | Education | 2026 |
| Crownplus International Ltd | Agriculture & fishing | 2025 |
| Crownvera Ltd | Wholesale & retail | 2026 |
| Crows Consulting Ltd | Professional & scientific | 2024 |
| Croyde Gardens Management Co Ltd | Real estate | 2014 |
| Croyde House Management Company Limited | Administrative & support | 2013 |
| CRS Roofing & Roofline Solutions Limited | Construction | 2015 |
| CRS Traders Ltd | Wholesale & retail | 2020 |
| CRT Solutions Ltd | Construction | 2014 |
| CRUISE2PASS Driving School Ltd | Education | 2026 |
| Crumbs & Frost Ltd | Hospitality | 2025 |
| Crumbs 2GO Ltd | Hospitality | 2014 |
| Crumbs and Sprinkles Ltd | Wholesale & retail | 2023 |
| Crumbs Away Ltd | Wholesale & retail | 2012 |
| Crunch (West Bridgford) Limited | Wholesale & retail | 2022 |
| Cruos Limited | Information & communication | 2022 |
| Crusader AV Limited | Extraterritorial | 2024 |
| Crusader Gifts Limited | Extraterritorial | 2024 |
| Crusader Limited | Wholesale & retail | 1987 |
| Crusader Products International Limited | Wholesale & retail | 2017 |
| Cruse Solutions Limited | Administrative & support | 2025 |
| Crusoe Garden Rooms Limited | Manufacturing | 2013 |
| Crust & Crave Ltd | Hospitality | 2025 |
| Crynk Ltd | Information & communication | 2025 |
| Cryobank Guarantor Limited | Professional & scientific | 2003 |
| Cryofusion Limited | Professional & scientific | 2007 |
| Cryopak Solutions Ltd | Wholesale & retail | 2014 |
| Cryptic Solutions Limited | Hospitality | 2025 |
| Crypto Cats Ltd | Wholesale & retail | 2021 |
| Cryptology Hull Ltd | Arts & recreation | 2022 |
| Cryptology Nottingham Ltd. | Arts & recreation | 2014 |
| Cryptolytx Ltd | Information & communication | 2022 |
| Crystal a & Z Ltd | Manufacturing | 2015 |
| Crystal B Property Limited | Real estate | 2024 |
| Crystal Car Wash Beeston Ltd | Administrative & support | 2022 |
| Crystal Clean (Nottingham) Limited | Administrative & support | 2003 |
| Crystal Consulting Limited | Professional & scientific | 2025 |
| Crystal Finance Services Limited | Professional & scientific | 2007 |
| Crystal Property Nottingham Limited | Real estate | 2025 |
| Crystal Shine Cleaning Services Nottingham Ltd | Administrative & support | 2018 |
| Crystal Sky Travels Ltd | Administrative & support | 2025 |
| Crystalkins Toys Ltd | Manufacturing | 2026 |
| Crystalmoon Limited | Hospitality | 1998 |
| Crystalrp Ltd | Information & communication | 2025 |
| Crème & Cloud Ltd | Manufacturing | 2026 |
| CS Acquisitions Limited | Real estate | 2016 |
| CS Automotive Derby Limited | Wholesale & retail | 2025 |
| CS Clean Team Limited | Administrative & support | 2023 |
| CS Mechanical Group Limited | Construction | 2024 |
| CS81 Property Ltd | Households | 2022 |
| CSC Window Films and Blinds Limited | Construction | 2013 |
| CSD Contract Cleaning and Maintenance Services Limited | Administrative & support | 1995 |
| CSE Property Rentals Ltd | Real estate | 2026 |
| CSF Barbering Ltd | Other services | 2018 |
| CSG Rental Properties Ltd | Real estate | 2019 |
| Csghp Limited | Construction | 2019 |
| CSH Investments Limited | Real estate | 2000 |
| CSJ Renovation Ltd | Construction | 2022 |
| CSK Leasing Ltd | Real estate | 2022 |
| CSK Ltd | Real estate | 2022 |
| CSM Brickwork Limited | Construction | 2015 |
| CSM Properties London Limited | Real estate | 2021 |
| Csoh Limited | Wholesale & retail | 2026 |
| CSP Electrical Solutions Ltd | Construction | 2018 |
| CSR Property Investments Limited | Real estate | 2019 |
| CSS24 Limited | Professional & scientific | 2020 |
| CST Healthcare Services Ltd | Health & social care | 2020 |
| CSUK1 Limited | Real estate | 2020 |
| CSV Clothing Ltd | Wholesale & retail | 2024 |
| CSW Fargate Limited | Construction | 2022 |
| CSW Legacy LLP | | 2011 |
| CT Carlton Limited | Hospitality | 2023 |
| CT Health & Beauty Services Ltd | Health & social care | 2023 |
| Ct&K Limited | Real estate | 2025 |
| CT4N Ltd | Transport & logistics | 2016 |
| CTA Roofing Ltd | Construction | 2026 |
| Ctga Professional Development Limited | Professional & scientific | 2012 |
| CTH Insights Ltd | Professional & scientific | 2025 |