| Chopsticks World Ltd | Hospitality | 2023 |
| Choseley Orchard Ltd | Wholesale & retail | 2025 |
| Chowdhury Property's Limited | Real estate | 2020 |
| Chrinimar Ltd | Extraterritorial | 2023 |
| Chris Curtis Consultant Limited | Health & social care | 2016 |
| Chris Foster Property Management Ltd | Real estate | 2024 |
| Chris Harding Quality Construction Ltd | Construction | 2019 |
| Christensen Consulting Ltd | Professional & scientific | 2024 |
| Christine Morton Limited | Other services | 2013 |
| Christopher Charles Actuarial Limited | Financial services | 2018 |
| Christopher Knight Limited | Construction | 2003 |
| Church Door Coffee Ltd | Manufacturing | 2026 |
| Chuttugulla Limited | Hospitality | 2025 |
| Ciao IT Limited | Hospitality | 2026 |
| Cigarette Waste Management Limited | Transport & logistics | 2019 |
| Cillean Digital Limited | Information & communication | 2016 |
| Cimarron Consulting Ltd | Information & communication | 2017 |
| Cimp Cars Sales Ltd | Wholesale & retail | 2025 |
| Cincinnatus Communications Limited | Information & communication | 2022 |
| Cine Vine Ltd | Administrative & support | 2026 |
| Cinemasource UK Limited | Wholesale & retail | 2005 |
| Cinquecento Consulting Limited | Information & communication | 2017 |
| Cipb Properties Ltd | Households | 2025 |
| Ciprum Limited | Information & communication | 2019 |
| Circle Strategic Design Limited | Information & communication | 2019 |
| Citech Ltd | Information & communication | 2013 |
| Citizens Information & Advice Bureau (Blackpool Advice) Ltd | Information & communication | 2025 |
| City Cooling Limited | Manufacturing | 2004 |
| City Development Associates Ltd | Professional & scientific | 2015 |
| City Distribution Limited | Wholesale & retail | 1987 |
| City Interim Limited | Administrative & support | 2000 |
| City Management Solutions Limited | Professional & scientific | 2017 |
| City Properties Blackpool Ltd | Real estate | 2021 |
| City Scaffolding NW Ltd | Construction | 2026 |
| Cityplex Ltd | Professional & scientific | 2018 |
| Ciyarams Limited | Wholesale & retail | 2024 |
| Cj's Snack Box Limited | Hospitality | 2025 |
| Cjam Ltd | Construction | 2023 |
| CJB SAP Professional Ltd | Information & communication | 2026 |
| CJK Drones Limited | Construction | 2018 |
| Cjmg Consultancy Limited | Information & communication | 2026 |
| Cjmw Transport Limited | Transport & logistics | 2020 |
| Cjp&D Ltd | Construction | 2017 |
| CK Commercial Properties Ltd | Hospitality | 2019 |
| CKG Consultant Services Ltd | Information & communication | 2019 |
| Cktt Holdings Ltd | Wholesale & retail | 2026 |
| CL Home Improvements Specialists Ltd | Construction | 2025 |
| Clack Contracts Limited | Administrative & support | 2024 |
| Clan Rock Bidco Limited | Financial services | 2024 |
| Clan Rock Midco Limited | Financial services | 2024 |
| Clan Rock Topco Limited | Financial services | 2024 |
| Clanfield Guttering Limited | Construction | 2015 |
| Clanwilliam House Ltd | Real estate | 2018 |
| Claremont First Step Community Centre | Health & social care | 2000 |
| Claremont Hotel Limited | Professional & scientific | 1986 |
| Claremont Management Company Limited | Households | 1972 |
| Clarence Court (South Shore) Management Association Limited | Households | 1972 |
| Clarence House Care Home Limited | Health & social care | 2019 |
| Clarendon Precious Metals Limited | Manufacturing | 2025 |
| Claritas.Bio Limited | Administrative & support | 2025 |
| Clarity 1ST Limited | Information & communication | 2009 |
| Clarke Holdings (NW) Limited | Financial services | 2020 |
| Clarke Phones Limited | Wholesale & retail | 2019 |
| Clarkin Consulting Ltd | Administrative & support | 2025 |
| Classic and Vintage Motorcycles Limited | Wholesale & retail | 2024 |
| Classic Marquees (Blackpool) Limited | Hospitality | 2009 |
| Classroom Media Ltd | Information & communication | 2026 |
| Classy Coffee Limited | Hospitality | 2026 |
| Clay Johnston Ltd | Real estate | 2021 |
| Clay Property Management Limited | Real estate | 2020 |
| Claymon Limited | Extraterritorial | 2018 |
| Clayton Publications Limited | Information & communication | 2023 |
| Clayton Rigging Services Ltd | Construction | 2022 |
| Clear Sky Retreats Ltd | Real estate | 2024 |
| Clearwater Haulage Limited | Transport & logistics | 2014 |
| Clearway Optical Services Limited | Manufacturing | 2004 |
| Clefsi Ltd | Information & communication | 2019 |
| Clementinox Limited | Professional & scientific | 2017 |
| Cleveland Ships Ltd | Wholesale & retail | 2025 |
| Cleveleys Heating & Plumbing (N.W.) Limited | Administrative & support | 2008 |
| Cleveleys Tyres Ltd | Wholesale & retail | 2002 |
| Clevelys Property Limited | Real estate | 2025 |
| Clgj Ltd | Mining & quarrying | 2019 |
| Click Cartel Shop Limited | Wholesale & retail | 2025 |
| Click Properties Blackpool Limited | Construction | 2011 |
| Clicktek Ltd | Information & communication | 2019 |
| Client Lighting Services Limited | Construction | 2002 |
| Clientility Limited | Information & communication | 2018 |
| Cliff Court Property Owners Association Limited | Households | 1970 |
| Cliffs Properties Ltd | Real estate | 2025 |
| Clifton Commercial Finance Ltd | Financial services | 2019 |
| Clifton Court (Blackpool) Management Company Limited | Households | 2007 |
| Clifton Court Property Management Company Limited | Households | 1992 |
| Clifton Drive Management (Lytham ST. Annes) Limited | Households | 1979 |
| Clifton Energy Ltd | Construction | 2020 |
| Clifton IT Solutions Limited | Information & communication | 2011 |
| Clifton Leisure Parks Limited | Hospitality | 2007 |
| Clifton Lodge Limited | Households | 1971 |
| Clifton View Management Company Limited | Households | 2014 |
| Climatize Air Conditioning Limited | Energy | 2018 |