| Cengar Limited | Manufacturing | 1945 |
| Centauri Perfumes Ltd | Administrative & support | 2019 |
| Central Delivery Ltd | Hospitality | 2024 |
| Central Design & Draughting Limited | Professional & scientific | 1991 |
| Centre Stage Travel Co. Ltd | Administrative & support | 2026 |
| Centric Precision Engineers Limited | Professional & scientific | 2018 |
| Centric Security and Policing LLP | | 2026 |
| Centro's Pizza Limited | Extraterritorial | 2012 |
| Certi Cuts Ltd | Other services | 2020 |
| CF Commercials & Exports Ltd | Wholesale & retail | 2026 |
| CFM Electrical Services Ltd | Construction | 2021 |
| CG Gymnastics Limited | Arts & recreation | 2019 |
| CGD Investments Ltd | Financial services | 2020 |
| CH Rafique & Son's UK Ltd | Wholesale & retail | 2016 |
| CH4 Commercial Ltd | Construction | 2024 |
| CHA CHA Chai Halifax Donuts Ltd | Hospitality | 2024 |
| Chaat Bar Ltd | Hospitality | 2026 |
| Chacha Jewellers (Halifax) Ltd | Wholesale & retail | 2015 |
| Chadburn Lighting Ltd | Wholesale & retail | 2024 |
| Chak Shezad Limited | Health & social care | 2026 |
| Challenging Security Limited | Administrative & support | 2013 |
| Champagne One Ltd | Wholesale & retail | 2015 |
| Chantelle's Support Ltd | Health & social care | 2025 |
| Chaplin Studio Limited | Wholesale & retail | 2024 |
| Chappelow Properties Ltd | Real estate | 2018 |
| Chappelow Transport Leeds Ltd | Transport & logistics | 2015 |
| Chargecraft Ltd | Wholesale & retail | 2026 |
| Chariots Pizza and Balti House Ltd | Hospitality | 2025 |
| Charlem Property Ltd | Real estate | 2023 |
| Charles Bailey Associates Ltd | Health & social care | 2009 |
| Charlotte Turton Studio Limited | Professional & scientific | 2023 |
| Charlotte Williams Properties Limited | Construction | 2019 |
| Charly Oscar Limited | Construction | 2020 |
| Charnock Bates Ltd. | Real estate | 2015 |
| Chasing Flags Digital Ltd | Professional & scientific | 2022 |
| Chaudhry & Brothers (UK) Ltd | Wholesale & retail | 2016 |
| Cheesecake Limited | Professional & scientific | 2022 |
| Cheltenham Court Halifax Ltd. | Real estate | 1995 |
| Chem Scaffolding Limited | Construction | 2008 |
| Chemical Monitoring Consultants (CMC) Ltd. | Professional & scientific | 2013 |
| Cheri Realty Ltd | Real estate | 2025 |
| Cherry Tree Cars Ltd | Wholesale & retail | 2025 |
| Cherry Tree Day Nursery Limited | Health & social care | 2010 |
| Chevin Management Services Limited | Extraterritorial | 1999 |
| Chill and Grill (Scunthorpe) Limited | Hospitality | 2025 |
| Chilo Limited | Transport & logistics | 2015 |
| Chilvers & Co Ltd | Real estate | 2025 |
| China Dragon 2026 Ltd | Hospitality | 2026 |
| China Dragon Halifax Ltd | Hospitality | 2023 |
| Chinese Grill HX Ltd | Hospitality | 2022 |
| Chiovera Ltd | Wholesale & retail | 2026 |
| Chippendale Investments Ltd | Wholesale & retail | 2023 |
| Chopstickz N Flamez Ltd | Hospitality | 2024 |
| Chris Berry Celebrant Limited | Other services | 2019 |
| Chris Bonsell Limited | Health & social care | 2011 |
| Chris Howell Transformations Ltd | Arts & recreation | 2023 |
| Chris Rhodes Electrical Limited | Construction | 2011 |
| Chris Robson Media Limited | Professional & scientific | 2014 |
| Chris Rudge Transport Services Limited | Transport & logistics | 2013 |
| Chris Thorpe Graphic Design Limited | Professional & scientific | 2015 |
| Chris Wilks Property Improvements Ltd | Construction | 2021 |
| Christa Ackroyd Media Limited | Real estate | 1999 |
| Christians Together Calderdale | Other services | 2006 |
| Christopher Dunphy Ecclesiastical Ltd | Construction | 2009 |
| Chrome Holdings Limited | Financial services | 2015 |
| Chronoworks Ltd | Information & communication | 2016 |
| Chrysalis Training & Consultancy Ltd | Health & social care | 2024 |
| Chrysandon Limited | Construction | 2003 |
| Church Meadows Limited | Households | 2004 |
| CI and GK Limited | Wholesale & retail | 2020 |
| Cinco Commercial Properties Ltd | Real estate | 2025 |
| Cinco Properties Ltd | Real estate | 2024 |
| Cinnamon Smoke Restaurant Ltd | Hospitality | 2025 |
| Circle Lounge Ltd | Hospitality | 2011 |
| Circuit Electrical Testing Limited | Construction | 2007 |
| Circular Economy CS Limited | Professional & scientific | 2020 |
| Cisfoods Ltd | Hospitality | 2026 |
| CJB International Ltd | Construction | 2026 |
| Cjhfba Ltd | Wholesale & retail | 2024 |
| CJL Group Limited | Construction | 2017 |
| Cjrs Halifax Limited | Other services | 2013 |
| CK Industrial Engineering Ltd | Professional & scientific | 2025 |
| CK Reynolds Consultants Ltd | Education | 2024 |
| CKD Hall Ltd | Real estate | 2015 |
| CKW Medical Ltd | Health & social care | 2012 |
| Claims 4U Limited | Professional & scientific | 2007 |
| Clair Louise Aesthetics Limited | Health & social care | 2021 |
| Clapham Agricultural Engineering Ltd | Manufacturing | 2019 |
| Clare Hall Halifax RTM Company Ltd | Households | 2025 |
| Claridges Solutions Limited | Construction | 2010 |
| Clarion Medical Consulting Limited | Professional & scientific | 2018 |
| Clarity Accountancy Solutions Limited | Professional & scientific | 2012 |
| Clarity Graphics Limited | Professional & scientific | 2018 |
| Clarke Concepts Ltd | Professional & scientific | 2023 |
| Clarke Holdings Yorkshire Ltd | Financial services | 2026 |
| Clarkes Optometry Ltd | Health & social care | 2014 |
| Claro Insights Ltd | Information & communication | 2025 |
| Classic Car Shows Limited | Administrative & support | 2020 |
| Classic Stamford Limited | Construction | 2014 |
| Classroom Secrets Limited | Education | 2013 |