| Coniston Cold Atv's Limited | Wholesale & retail | 2015 |
| Coniston Fibres Limited | Manufacturing | 1999 |
| Connecfloor Limited | Construction | 2015 |
| Connected Security Group Limited | Administrative & support | 2020 |
| Cononley Farms LLP | | 2015 |
| Cononley Village Shop Limited | Real estate | 2015 |
| Construct Energy Services Ltd | Construction | 2022 |
| Construct Properties Ltd | Real estate | 2024 |
| Construction Law Expert Limited | Professional & scientific | 2013 |
| Control Technology UK Ltd | Wholesale & retail | 2003 |
| Convenience Hire Limited | Administrative & support | 2009 |
| Convert My Home Ltd | Construction | 2024 |
| Coppack Driver Services Limited | Transport & logistics | 2018 |
| Copper Oak Limited | Construction | 2024 |
| Copter Chronicles Ltd | Professional & scientific | 2024 |
| Copychoice Limited | Wholesale & retail | 1982 |
| Core Drilling Services (7 Group) Limited | Construction | 2023 |
| Core Kitchens Ltd | Manufacturing | 2020 |
| Cored Training Services Limited | Education | 2021 |
| Coreedge Development Ltd | Construction | 2025 |
| Corex Energy Solutions Ltd | Construction | 2024 |
| Corkys Auto Repairs Ltd | Wholesale & retail | 2010 |
| CORNER35 Limited | Wholesale & retail | 2025 |
| Cornerstone Workspaces Ltd | Real estate | 2024 |
| Cornmill Management Limited | Households | 1991 |
| Corporate and Commercial Credit Solutions Limited | Administrative & support | 2010 |
| Corvello Ltd | Wholesale & retail | 2026 |
| Cosmetic Car Care Keighley Ltd | Wholesale & retail | 2022 |
| Cosurica Ltd | Information & communication | 2007 |
| Cosy Inn Acquisitions Ltd | Real estate | 2025 |
| Coty & Madison Limited | Other services | 2019 |
| Cougar Printing Company Limited | Manufacturing | 2002 |
| Cougarmania Foundation | Education | 2019 |
| Counting House Silsden Limited | Hospitality | 2022 |
| County Computer Consultants Limited | Information & communication | 1998 |
| Courthope Ltd | Real estate | 2022 |
| Courthouse Hair Lounge Ltd | Other services | 2024 |
| Cowal Holdings Limited | Professional & scientific | 2020 |
| Cowal Technology Ltd. | Professional & scientific | 2015 |
| Cowling 1957 Limited | Extraterritorial | 2013 |
| Cowling Manor Ltd | Real estate | 2012 |
| Cowling Pre-School and Toddlers | Education | 2011 |
| CPN Elevation Limited | Professional & scientific | 2023 |
| CPS Media Ltd | Professional & scientific | 2012 |
| Cpubs Black Swan Ltd | Hospitality | 2026 |
| Crag Side Contractors Ltd | Construction | 2019 |
| Craiglands Properties Ltd | Construction | 2023 |
| Craven Business Solutions Ltd | Administrative & support | 2020 |
| Craven Canine Wellness Limited | Wholesale & retail | 2020 |
| Craven Car Sales Ltd | Wholesale & retail | 2024 |
| Craven Clearances Limited | Transport & logistics | 2025 |
| Craven Consultancy Services Limited | Administrative & support | 2006 |
| Craven Curtains Limited | Wholesale & retail | 2009 |
| Craven HR Services Limited | Extraterritorial | 2020 |
| Craven Safety Services Limited | Extraterritorial | 2020 |
| Craven Training Services Limited | Extraterritorial | 2022 |
| Cravens Plasterers Limited | Construction | 2016 |
| Creation Living Space Ltd | Manufacturing | 2019 |
| Creative Banks Ltd | Professional & scientific | 2019 |
| Creative Calling Care Ltd | Public administration | 2022 |
| Creative Marmalade Limited | Professional & scientific | 2015 |
| Crestgreen Limited | Real estate | 1994 |
| Cricket Performance Academy Ltd | Education | 2024 |
| Croft House Care Home Limited | Health & social care | 2006 |
| Croftside Residential Developments Limited | Administrative & support | 1992 |
| Cromwell Fish Farms Limited | Wholesale & retail | 2023 |
| Cromwell Lake Lodges Limited | Agriculture & fishing | 2023 |
| Cromwell Lakes Limited | Agriculture & fishing | 2023 |
| Crossroads Developments Limited | Construction | 2007 |
| Crownix Holdings Ltd | Financial services | 2026 |
| Crush and Munch Limited | Hospitality | 2025 |
| Crvng Ltd | Wholesale & retail | 2026 |
| Crystal Pharma Limited | Wholesale & retail | 2022 |
| Crystal Productions Limited | Real estate | 1992 |
| Crystalmark Limited | Information & communication | 1998 |
| CSL Tech & Style Ltd | Wholesale & retail | 2025 |
| Cube Home Energy Saving Solutions Limited | Extraterritorial | 2023 |
| Cucina DI Valentino Limited | Hospitality | 2015 |
| CUE Sports Yorkshire Ltd | Wholesale & retail | 2017 |
| Cullingworth Developments Ltd | Construction | 2025 |
| Cura Nutrition Ltd | Wholesale & retail | 2019 |
| Cutsbyjunaid Limited | Other services | 2025 |
| CV Motors KLY Limited | Transport & logistics | 2023 |
| CW Developments (Yorkshire) Ltd | Extraterritorial | 2016 |
| CWJ Media Limited | Professional & scientific | 2021 |
| CWM 2001 Limited | Professional & scientific | 2001 |
| CWM Edit Ltd | Information & communication | 2017 |
| CWZ Ltd | Other services | 2022 |
| Cypron International Consulting Engineers Limited | Construction | 2021 |
| D & B Stone Masonry Ltd | Manufacturing | 2022 |
| D & J Appleyard Properties Ltd | Real estate | 2024 |
| D & M Appleby Ltd | Wholesale & retail | 2025 |
| D & N Assets Ltd | Real estate | 2020 |
| D a H Salons Limited | Other services | 2016 |
| D and K Chapman Limited | Financial services | 2012 |
| D M Clayton Building Contractor Ltd | Construction | 2013 |
| D M Laycock Catering Limited | Hospitality | 2014 |
| D P & a Gallagher Limited | Other services | 2002 |
| D&H Joinery Services Ltd | Construction | 2025 |
| D. Chester Site Service Limited | Construction | 2022 |