| Credible Media Community Hub CIC | Information & communication | 2025 |
| Credible Media Limited | Information & communication | 2013 |
| Credit Help Hire Ltd | Administrative & support | 2014 |
| Creditum (UK) Ltd. | Administrative & support | 2008 |
| Creedos Ltd | Wholesale & retail | 2016 |
| Cregan-Heap & Sons Plastering Ltd | Construction | 2024 |
| Cremdirect Limited | Other services | 2013 |
| Creme Desserts Ltd | Hospitality | 2025 |
| Crestfield Consulting Limited | Wholesale & retail | 2025 |
| Crewe Construction Co Ltd | Transport & logistics | 2015 |
| Crewe Roofing Ltd | Construction | 2026 |
| Cribs International Ltd | Health & social care | 2017 |
| Cridford Removals Limited | Transport & logistics | 2025 |
| Crimson Manor Group Ltd | Construction | 2023 |
| Cris Clean Ltd | Administrative & support | 2022 |
| Cristina Puntaru Ltd | Information & communication | 2018 |
| Critchley Green Ltd | Professional & scientific | 2024 |
| CRL Golf Co Ltd | Wholesale & retail | 2011 |
| Croft Recruitment Limited | Professional & scientific | 2002 |
| Croftwood Developments Limited | Construction | 2012 |
| Crolla Design Limited | Extraterritorial | 2023 |
| Crompton & Royton Cars Ltd | Transport & logistics | 2015 |
| Crompton and Royton Golf Club,Limited(The) | Arts & recreation | 1914 |
| Crompton Hall Estate Ltd | Households | 2016 |
| Crompton House Church of England Multi Academy Trust | Education | 2011 |
| Crosby Business Centre Limited | Financial services | 2013 |
| Cross Country Care Ltd | Health & social care | 2026 |
| Crossfit OL1 Ltd | Arts & recreation | 2014 |
| Crosshire Limited | Real estate | 1987 |
| Crossroads Catering Ltd | Hospitality | 2025 |
| Crowd Inns Ltd | Hospitality | 2021 |
| Crown Lettings (Middleton) Limited | Real estate | 2019 |
| Crown Rocks Ltd | Wholesale & retail | 2026 |
| Crowther Oldham Limited | Construction | 2010 |
| CRS Credit Ltd. | Administrative & support | 2011 |
| Crumbles (Delph) Limited | Hospitality | 2023 |
| Cruzzzing Jacs Limited | Wholesale & retail | 2024 |
| Crypco Limited | Professional & scientific | 2015 |
| Crypteon AI Limited | Wholesale & retail | 2025 |
| Cryptosafe Ltd | Information & communication | 2016 |
| Crystal Cars MCR Ltd | Wholesale & retail | 2022 |
| Crystal Clear Windows and Driveways Ltd | Administrative & support | 2025 |
| Crystal Enterprises Limited | Wholesale & retail | 2011 |
| Crystal Executive Chauffeurs Ltd | Transport & logistics | 2024 |
| Crystal Gate Homes Ltd | Real estate | 2025 |
| Crystal Green Property Services Ltd | Construction | 2023 |
| Crystal Green Roof and Exterior Cleaning Ltd | Administrative & support | 2025 |
| Crystal Shine Pro Ltd | Construction | 2025 |
| CRYSTAL18 Limited | Health & social care | 2022 |
| Crystalsight Limited | Health & social care | 2014 |
| Cryvonix AI Limited | Wholesale & retail | 2025 |
| CS Medics Ltd | Health & social care | 2021 |
| CS Sheet Metal Limited | Manufacturing | 2011 |
| Csdpropertygroup Ltd | Construction | 2026 |
| Cshenton Pointing and Building Services Ltd | Manufacturing | 2019 |
| Cskv Properties Limited | Real estate | 2017 |
| CSS Cleaning Ltd | Administrative & support | 2025 |
| CT Care Nest Ltd | Public administration | 2026 |
| CTI Computers Ltd | Other services | 2010 |
| CTI Polishing Ltd | Manufacturing | 2025 |
| Ctia Ltd | Education | 2021 |
| Ctrl Media Limited | Information & communication | 2007 |
| CTS Executive Ltd | Transport & logistics | 2025 |
| Ctschauffeurs Ltd | Transport & logistics | 2021 |
| Cube Plus Limited | Wholesale & retail | 2014 |
| Cubicle Warehouse Ltd | Manufacturing | 2021 |
| Cuero Artisan Limited | Wholesale & retail | 2025 |
| Cult Creative Ltd | Other services | 2019 |
| Cultivate Recruitment Group Ltd | Administrative & support | 2024 |
| Cultivate Recruitment Holdings Limited | Financial services | 2024 |
| Cumberland Property Holding LLP | | 2023 |
| Cumberland Property Rentals Ltd | Real estate | 2026 |
| Cumberland Roofing Ltd | Construction | 2020 |
| Cunbar Holdings Limited | Financial services | 2022 |
| Cunbar Paints Limited | Wholesale & retail | 1985 |
| Cunningham Contractors Limited | Construction | 2008 |
| Cunninghams News Convenience Store Ltd | Wholesale & retail | 2025 |
| Cunninghams Upvc & Warm Roof Spec. Ltd | Construction | 2024 |
| CUP &Co. Limited | Hospitality | 2024 |
| Cura Developments Limited | Construction | 2026 |
| Curantis Group Limited | Health & social care | 2026 |
| Cure by Lola Ltd | Extraterritorial | 2025 |
| Curious Charms Ltd | Arts & recreation | 2015 |
| Curley Construction Consulting Services Limited | Professional & scientific | 2018 |
| Curly HQ Limited | Wholesale & retail | 2021 |
| Curran Fire and Electrical Services Ltd | Administrative & support | 2020 |
| Current Connections Oldham Ltd | Manufacturing | 2025 |
| Current Loop Limited | Information & communication | 2022 |
| Current Trend Enterprises Ltd | Wholesale & retail | 2023 |
| Curry House (Middleton) Ltd | Hospitality | 2017 |
| Cushioncovershop Limited | Wholesale & retail | 2018 |
| Custom Built Leisure Ltd | Wholesale & retail | 2021 |
| Custom Eco Solutions Ltd | Professional & scientific | 2023 |
| Customer Street Limited | Professional & scientific | 2018 |
| Customised Cricket Bats Limited | Manufacturing | 2023 |
| CUT to Black Touring Ltd | Arts & recreation | 2025 |
| Cut&Run CLO. Ltd | Wholesale & retail | 2025 |
| CVS (MCR) Ltd | Wholesale & retail | 2025 |
| CVW Property Limited | Real estate | 2024 |
| CW Cleans Limited | Administrative & support | 2024 |