| Clark Planning Consultants Limited | Professional & scientific | 2005 |
| Clarke and Johnston Motor Engineers Ltd | Wholesale & retail | 2002 |
| Clarke Broome & Fleming Limited | Professional & scientific | 2001 |
| Classic Showjumps Limited | Manufacturing | 1997 |
| Classique Thornton Limited | Construction | 2004 |
| Clayton Contract Upholstery Limited | Manufacturing | 2003 |
| Clean Residents Ltd | Administrative & support | 2025 |
| Cleancroft Ltd | Financial services | 2000 |
| Cleaner Premises FM Limited | Administrative & support | 2003 |
| Cleanpoint Restoration Limited | Administrative & support | 2003 |
| Clear-A-Drain Limited | Professional & scientific | 1990 |
| Clearcase Limited | Construction | 2003 |
| Cleartech Limited | Professional & scientific | 2003 |
| Cleveleys Catering Ltd | Hospitality | 2003 |
| Clientserv Limited | Information & communication | 2004 |
| Clifford Marsden Services Limited | Administrative & support | 1980 |
| Clifford White Limited | Extraterritorial | 1972 |
| Clifftar Limited | Wholesale & retail | 1980 |
| Clitheroe DRY Cleaners Limited | Other services | 2003 |
| Clowe Art Limited | Administrative & support | 2003 |
| Clyde Ferns Ltd | Wholesale & retail | 2025 |
| Clydemanor Properties Ltd | Extraterritorial | 2000 |
| CMP Properties (UK) Limited | Real estate | 2003 |
| Coach House Court Management Company Limited | Households | 1999 |
| Coastdaleparks Limited | Hospitality | 2004 |
| Coba Limited | Other services | 2003 |
| Cobalt Way Trade Limited | Wholesale & retail | 2026 |
| Cockerham Garage Limited | Wholesale & retail | 2002 |
| Cogent Solutions Ltd | Other services | 2023 |
| Cohen & Cohen Ltd | Wholesale & retail | 2003 |
| Coherent IT Limited | Information & communication | 2002 |
| Colin Braithwaite Excavators Limited | Construction | 2000 |
| Collyville Ltd | Extraterritorial | 2007 |
| Colne Open Door Centre Limited | Health & social care | 2007 |
| Colour World (UK) Limited | Real estate | 2001 |
| Colours & Beauty Limited | Other services | 2001 |
| Commodity Plastics Limited | Extraterritorial | 1996 |
| Compactcaddy Ltd | Manufacturing | 1998 |
| Competitive Edge (Ormskirk) Limited | Wholesale & retail | 2008 |
| Complete Unique Interiors UK Limited | Extraterritorial | 2024 |
| Computionics Group Limited | Financial services | 2005 |
| Concentric IT Limited | Information & communication | 2004 |
| Concept Distribution Limited | Administrative & support | 2004 |
| Concept Training Limited | Education | 1998 |
| Concrete Free Systems Ltd | Construction | 2020 |
| Congilsons Ltd | Construction | 2025 |
| Connell Brothers Limited | Construction | 1990 |
| Connellys Fencing Limited | Manufacturing | 2002 |
| Constell Engineers Limited | Manufacturing | 1998 |
| Construction and Rail Estimating Services Limited | Professional & scientific | 2005 |
| Construction MS Ltd | Construction | 2026 |
| Continental Project Limited | Real estate | 2011 |
| Contra Services Limited | Professional & scientific | 1993 |
| Contract DBA Limited | Real estate | 2003 |
| Contract Embroidery Ltd | Manufacturing | 2004 |
| Cooke & Company Estates Limited | Real estate | 2000 |
| Cooke Developments Limited | Extraterritorial | 1999 |
| Cool Running Technology Limited | Education | 2000 |
| Coolideas Limited | Manufacturing | 2001 |
| Copyright Graphics Limited | Manufacturing | 1982 |
| Coriolis International Limited | Construction | 2006 |
| Corlett Electrical Engineering Company (1981) Limited | Construction | 1981 |
| Corlett Systems Limited | Construction | 2001 |
| Cornerhouse Media Limited | Information & communication | 2007 |
| Cornforth Properties Ltd. | Real estate | 1997 |
| Correct Flow Engineering Limited | Manufacturing | 1995 |
| Corrosion Resistant Products Limited | Manufacturing | 1998 |
| Corrys Limited | Wholesale & retail | 2003 |
| County Garden Consultants Limited | Wholesale & retail | 2004 |
| Courtney and Aspin Real Estate Limited | Real estate | 2025 |
| Coverdale (UK) Limited | Manufacturing | 2003 |
| Coverhills Limited | Extraterritorial | 1976 |
| Cowburns Farm Limited | Agriculture & fishing | 2003 |
| Cradlebay Limited | Information & communication | 2004 |
| Cranberry Coachways Limited | Transport & logistics | 2004 |
| Craven Carpets NW Ltd | Construction | 2025 |
| Craven County Automatic Holdings Limited | Real estate | 1961 |
| Crescent Cafe (Cleveleys) Limited | Real estate | 1945 |
| Crescent Community Radio Ltd | Information & communication | 2004 |
| Crescent Properties North West Limited | Real estate | 2007 |
| Crestsolar Limited | Extraterritorial | 1998 |
| Critchley & Mulhearn Limited | Hospitality | 1961 |
| Croft Investments Limited | Real estate | 1998 |
| Croft Management Holdings Limited | Financial services | 2001 |
| Crooks Fish Bars Limited | Wholesale & retail | 2002 |
| Crosswinds Properties Limited | | 2002 |
| Croston Hall Limited | Hospitality | 2002 |
| Crown Mews Flats Management Company (NO.2) Limited | Households | 1994 |
| Crumax Magnetics Limited | Transport & logistics | 1990 |
| Crusader Cabs Limited | Extraterritorial | 2008 |
| Cryer Fabrications Limited | Wholesale & retail | 1979 |
| CSD Property Limited | Real estate | 2006 |
| CST Traders Limited | Hospitality | 2025 |
| Cube Clothing Limited | Wholesale & retail | 2002 |
| Cuerden (Trucks) Limited | Wholesale & retail | 1959 |
| Cuerden Associates Limited | Administrative & support | 2008 |
| Cuerden Motors (Bamber Bridge) Limited | Wholesale & retail | 1951 |
| Cuetech Limited | | 1990 |
| Curious UK Limited | Wholesale & retail | 2003 |
| Cyclo Chemicals Limited | Professional & scientific | 1938 |