| Compart Limited | Wholesale & retail | 2018 |
| Compass Leadership Limited | Professional & scientific | 2009 |
| Complete Community Care (North West) Limited | Health & social care | 2013 |
| Complete Electrical Services (NW) Ltd. | Construction | 2013 |
| Complete Housing Limited | Households | 2017 |
| Complex Care Professionals Limited | Health & social care | 2017 |
| Compliance Direct Solutions Ltd | Professional & scientific | 2019 |
| Composite Direct Windows Ltd | Other services | 2023 |
| Compotex Limited | Manufacturing | 1994 |
| Compsmart Ltd | Information & communication | 2020 |
| Computechnology Ltd | Wholesale & retail | 2016 |
| Concept Interiors NW Limited | Professional & scientific | 2020 |
| Concept Tiles and Construction Ltd | Construction | 2021 |
| Condition Monitoring Solutions Limited | Construction | 2012 |
| Condor Ironworks Limited(The) | Real estate | 1908 |
| Confectionary Wholesale Ltd | Hospitality | 2024 |
| Connaught Property Management Ltd | Real estate | 2019 |
| Connect Assets Ltd | Financial services | 2025 |
| Connect Construction Limited | Construction | 2023 |
| Connect Skills & Training Ltd | Education | 2016 |
| Connolly Financial Consultants Limited | Administrative & support | 2003 |
| Consent for ALL CIC | Health & social care | 2025 |
| Considine Consulting Ltd | Professional & scientific | 2024 |
| Constructconnect Ltd | Wholesale & retail | 2018 |
| Construction Recycling Services Limited | Water & waste | 2008 |
| Construgantt Ltd | Information & communication | 2023 |
| Consult Electrical Ltd | Construction | 2023 |
| Consultancy Empire Ltd | Extraterritorial | 2011 |
| Consultancy Services NW Limited | Information & communication | 2021 |
| Consultiflex Ltd | Other services | 2024 |
| Content Design Works Ltd | Information & communication | 2024 |
| Continuous Transfer Paper Printers Limited | Manufacturing | 1984 |
| Contract Management Services (Northern) Limited | Administrative & support | 2003 |
| Control System Integration Ltd | Administrative & support | 2002 |
| Converting Machinery Solutions Limited | Manufacturing | 2000 |
| Cool Hand Ltd | Wholesale & retail | 2009 |
| Cool Repair Scientific UK Ltd. | Administrative & support | 1998 |
| Cool Running Rental Ltd | Administrative & support | 2013 |
| Cooney Construction Limited | Construction | 2001 |
| Cope & Co Property Ltd | Hospitality | 2017 |
| Copious Group Limited | Financial services | 2021 |
| Copious Limited | Information & communication | 2018 |
| Copper POT Finest Ltd | Hospitality | 2019 |
| Copper POT Ltd | Hospitality | 2006 |
| Coppice Construction Services Ltd | Professional & scientific | 2025 |
| Coral Corporate Limited | Administrative & support | 2013 |
| Cordinate Properties Limited | Real estate | 2021 |
| Core Fitness Coaching Ltd | Health & social care | 2022 |
| Core Mechanical Services Ltd | Manufacturing | 2020 |
| Core Ventilation Services Limited | Manufacturing | 2018 |
| Coreledger Ltd | Professional & scientific | 2026 |
| Coreops Solutions Limited | Information & communication | 2025 |
| Corepfp Ltd | Construction | 2026 |
| Coreserv Group Limited | Information & communication | 2023 |
| Coreserv Limited | Information & communication | 2023 |
| Coria Commercial Finance Limited | Financial services | 2009 |
| Corinya H Limited | Financial services | 2019 |
| Corinya Holdings Limited | Real estate | 1991 |
| Coronation Properties (Oldham) Limited | Real estate | 2023 |
| Corporation Coffee Limited | Hospitality | 2016 |
| Correct Brickwork & Construction Ltd | Construction | 2022 |
| Cortes Carr Limited | Administrative & support | 2013 |
| Cosmic Universe Ltd | Professional & scientific | 2019 |
| Cosy Escapes Ltd | Real estate | 2024 |
| Cosy Paws Ltd | Wholesale & retail | 2026 |
| Cotes Construction Limited | Construction | 2025 |
| Cottrell Services Limited | Construction | 2003 |
| Country Manor Properties Ltd | Construction | 2024 |
| Court House Freehold Investments Ltd | Real estate | 2012 |
| Courtyard Kitchens & Interiors Limited | Transport & logistics | 2007 |
| Cowell & Norford Lettings & Management Services Limited | Real estate | 2002 |
| Cowell and Norford Financial Services Ltd. | Real estate | 1996 |
| Cowm Leisure Limited | Arts & recreation | 2000 |
| Cozi-Properties Ltd | Real estate | 2024 |
| Cozy Bloom Ltd | Wholesale & retail | 2023 |
| Cozy Market Limited | Wholesale & retail | 2026 |
| CP Partners Ltd | Real estate | 2024 |
| CP Safety Ltd | Professional & scientific | 2021 |
| CPD Property Holdings Ltd | Real estate | 2021 |
| CPD Property Services Ltd | Administrative & support | 2009 |
| Crab Nebular Limited | Real estate | 2024 |
| Crabtree Electrical Services Ltd | Construction | 2008 |
| Cradle Direct Limited | Construction | 2024 |
| Cragg Consult Limited | Professional & scientific | 2023 |
| Craig Y MOR Caravan Park Limited | Administrative & support | 2008 |
| Crampton Heating & GAS Installations Ltd | Construction | 2025 |
| Crave Cart Co Limited | Hospitality | 2025 |
| Cravin Junction Ltd | Hospitality | 2026 |
| Crawshaws Meats Ltd | Wholesale & retail | 2025 |
| Craze (NW) Holding Limited | Real estate | 2022 |
| Craze (NW) Limited | Wholesale & retail | 2016 |
| Crazy DIY Ltd | Wholesale & retail | 2024 |
| Creaovate Limited | Construction | 2025 |
| Created by Harrison Ltd | Information & communication | 2025 |
| Creative Ageing Development Limited | Education | 2022 |
| Creative Agent AI Ltd | Information & communication | 2021 |
| Creative Beauty Ltd | Other services | 2023 |
| Creative Health and Well-Being CIC | Arts & recreation | 2019 |
| Creative Hive Collective CIC | Arts & recreation | 2026 |
| Creative Marketing (NW) Ltd | Professional & scientific | 2017 |