| CAS Structural Engineering Limited | Professional & scientific | 2014 |
| Casa Luis Limited | Real estate | 2010 |
| Casa Mela Limited | Real estate | 2024 |
| Casa MIA Harrogate Limited | Hospitality | 2018 |
| Casalo Limited | Information & communication | 2025 |
| Case-Co Catering Equipment Ltd | Hospitality | 1997 |
| Cash Vault Ltd | Extraterritorial | 2026 |
| Caskets Band Ltd | Wholesale & retail | 2021 |
| Castellum (Summerbridge FST) Limited | Professional & scientific | 2016 |
| Castellum (Summerbridge M C) Limited | Construction | 2018 |
| Castellum Homes Limited | Professional & scientific | 2016 |
| Castironrads Limited | Manufacturing | 2010 |
| Castle Cafe Knaresborough Ltd | Manufacturing | 2023 |
| Castleforge Antiques Ltd | Wholesale & retail | 2006 |
| Castles Architectural Design Services Ltd. | Professional & scientific | 2011 |
| Castlestead (Pateley Bridge) Management Company Limited (the) | Households | 1961 |
| Castleton Group Limited | Professional & scientific | 2008 |
| Catalyst Executive Search (Engineering) Limited | Real estate | 2012 |
| Catalyst Mobile Ltd | Information & communication | 2009 |
| Cataserv Ltd | Professional & scientific | 2012 |
| Cater-Clean Solutions Limited | Administrative & support | 2015 |
| Catherine Veen Limited | Health & social care | 2013 |
| Catherine's Place Ltd | Arts & recreation | 2025 |
| Catmandoes Limited | Professional & scientific | 2016 |
| Cattlemens Grill Limited | Hospitality | 2016 |
| Caught Light Photography Limited | Professional & scientific | 2015 |
| Causal Insights Solutions Limited | Information & communication | 2023 |
| Cavendish Gardens Management Limited | Households | 2009 |
| Cavendish Lodge Holding Company Limited | Financial services | 2025 |
| Cavisa Management Limited | Professional & scientific | 2017 |
| Cbcf Limited | Real estate | 2019 |
| CBD Holdings Limited | Financial services | 2018 |
| CBG Property Holdings Ltd | Real estate | 2026 |
| Ccat Group Ltd | Professional & scientific | 2019 |
| CCF Accountancy Limited | Professional & scientific | 2010 |
| CD Media and Marketing Ltd | Professional & scientific | 2025 |
| CDC Global Solutions Ltd | Professional & scientific | 2024 |
| Cdfy Community Grow Project CIC | Education | 2024 |
| CDH Yorkshire Ltd | Education | 2016 |
| CECEL1A Limited | Extraterritorial | 2020 |
| Cecil Limited | Extraterritorial | 2015 |
| CEF Healthcare Limited | Health & social care | 2021 |
| Celd Holdings Limited | Financial services | 2015 |
| Celebrity FM Ltd | Extraterritorial | 2015 |
| Celine E-Bizz Ltd. | Information & communication | 2001 |
| Celtic Visions Limited | Wholesale & retail | 1995 |
| Cemedge Limited | Extraterritorial | 2025 |
| Central Garage (Harrogate) Limited | Wholesale & retail | 2017 |
| Central Point Recruitment Limited | Administrative & support | 2014 |
| Centred Psychology Limited | Education | 2021 |
| Centric 2016 Limited | Professional & scientific | 2017 |
| Centric Group Limited | Wholesale & retail | 1996 |
| Centric Office Solutions Limited | Wholesale & retail | 1988 |
| Centurion Cues Limited | Wholesale & retail | 2025 |
| Centurion Speciality Chemicals Limited | Wholesale & retail | 1991 |
| Ceramics Porcelain & Stone Associates Limited | Administrative & support | 2005 |
| Ceremonies of Love Limited | Information & communication | 2023 |
| Cerl Ltd | Financial services | 2024 |
| Certificate Providers Ltd | Wholesale & retail | 2024 |
| Certinia UK Limited | Information & communication | 2016 |
| Cervia Ltd | Construction | 2025 |
| Ceta Form Limited | Wholesale & retail | 2012 |
| CF Touring Production Management Limited | Professional & scientific | 2023 |
| CGE Engineering Ltd | Wholesale & retail | 2025 |
| CGL 2014 Limited | Professional & scientific | 2014 |
| CGR Wealth Management Ltd | Financial services | 2012 |
| Chalegreen Services Ltd | Professional & scientific | 2018 |
| Chalk Creative Consultants Limited | Arts & recreation | 2015 |
| Chalkmark Limited | Financial services | 2019 |
| Chameleon Technology (UK) Limited | Manufacturing | 2010 |
| Chameleon Technology Holdings Limited | Professional & scientific | 2020 |
| Chamont Consulting Ltd | Professional & scientific | 2020 |
| Champerscut Limited | Other services | 2019 |
| Chandler Bakery Ltd | Wholesale & retail | 2020 |
| Chandler Retail Ltd | Wholesale & retail | 2016 |
| Chandler Swift Limited | Extraterritorial | 2026 |
| Change Capital Partners Limited Liability Partnership | | 2002 |
| Changemaker International Ltd | Professional & scientific | 2024 |
| Changing Dynamics Limited | Professional & scientific | 2016 |
| Changing the Landscapes Community Interest Company | Education | 2026 |
| Channel Impact Marketing Ltd | Professional & scientific | 2023 |
| Chapeau London Ltd | Manufacturing | 2025 |
| Chapel Allerton Pilates Limited | Arts & recreation | 2015 |
| Chapel Medical Aesthetics Ltd | Other services | 2024 |
| Chapel Street Homes (Thirsk) Limited | Construction | 2023 |
| Chappell Crest Limited | | 2012 |
| Charles Edmondson Physiotherapy Limited | Health & social care | 2025 |
| Charles Hanson Ltd | Other services | 2023 |
| Charles Waite & Co Limited | Real estate | 2010 |
| Charles Wilson Ltd | Wholesale & retail | 2002 |
| Charlesworth Publishing Ltd | Information & communication | 2025 |
| Charlie Fisher Electrical Ltd | Construction | 2024 |
| Charlie KAY Ltd | Wholesale & retail | 2023 |
| Charlotte Dean Coaching & Consultancy Ltd | Professional & scientific | 2025 |
| Charlotte Frank PA Services Ltd | Administrative & support | 2017 |
| Charlton Plumbing and Heating Ltd | Construction | 2019 |
| Charming Charlie Limited | Extraterritorial | 2012 |
| Charnwood Instrumentation Services Limited | Professional & scientific | 1986 |
| Charter Court Preston Limited | Households | 2024 |
| Chase 25 Ltd | Health & social care | 2025 |