| Cliffe Farms Limited | Agriculture & fishing | 2007 |
| Clinton Lewis Heating Limited | Professional & scientific | 2011 |
| Clipson Music Ltd | Information & communication | 2017 |
| Cliptent Limited | Professional & scientific | 2006 |
| Clive Price Transport Limited | Transport & logistics | 2013 |
| CLJ Holdings Hereford Ltd | Extraterritorial | 2016 |
| Close House Projects | Health & social care | 2005 |
| Cloud Culture Ltd | Wholesale & retail | 2025 |
| Clover Developments Limited | Real estate | 2017 |
| CLT 1973 Limited | Real estate | 2016 |
| Club Developments Ltd | Construction | 2024 |
| Club Five Ltd | Arts & recreation | 2021 |
| Clyde House RTM Company Limited | Households | 2013 |
| CM Craft Limited | Wholesale & retail | 2021 |
| CM Landscapes Limited | Administrative & support | 2026 |
| CMA (Hereford) Ltd | Administrative & support | 2026 |
| CMI Distribution Limited | Wholesale & retail | 1994 |
| Cnewr Farms Limited | Professional & scientific | 1991 |
| Cnsport Limited | Wholesale & retail | 2021 |
| Co-Creation Partnership Ltd | Professional & scientific | 2018 |
| CO2 Architects Limited | Professional & scientific | 2001 |
| Coach 1ST Ltd | Other services | 2019 |
| Coach Logistics Limited | Transport & logistics | 2016 |
| Coaching Academy of Sports Education Ltd | Education | 2023 |
| Coastal Active Media Ltd | Administrative & support | 2026 |
| Cobb Agri Ltd | Wholesale & retail | 1982 |
| Cobden Court (Ross-On-Wye) Limited | Real estate | 2006 |
| Coco Nail Salon Limited | Other services | 2024 |
| Codex Curiosarum Ltd | Arts & recreation | 2026 |
| Cognisant Holdings Ltd | Financial services | 2021 |
| Cognisant Investments Ltd | Real estate | 2021 |
| Cogniwire Ltd | Information & communication | 2011 |
| Coldgreen Ltd | Real estate | 2020 |
| Coldstream Sporting Ltd | Arts & recreation | 2007 |
| Cole Residential Properties Limited | Real estate | 2019 |
| Coley's Groundworks Limited | Construction | 2021 |
| Colin James Home & Site Services Limited | Construction | 2023 |
| Colitus Ltd | Information & communication | 2011 |
| Collar & Cuffs Ltd | Other services | 2003 |
| College Gate (Hereford) Management Company Limited | Real estate | 2002 |
| College Green Chip Shop Limited | Hospitality | 2016 |
| College Green Stores Holdings Limited | Financial services | 2026 |
| Collett Export Limited | Wholesale & retail | 1964 |
| Collett Group Limited | Financial services | 1973 |
| Colley ROW Management Limited | Households | 2024 |
| Collins Botiuk Limited | Professional & scientific | 2025 |
| Colosseum Development Co Ltd | Construction | 2016 |
| COM Jasmine Limited | Hospitality | 2026 |
| Combe Hill Flats Limited | Households | 2014 |
| Comfy Routes Limited | Transport & logistics | 2025 |
| Comfy UK Stays Ltd | Hospitality | 2024 |
| Commercial Fuel Development Limited | Other services | 2017 |
| Commercial Gutter Calculations Ltd | Administrative & support | 2026 |
| Commercial Road (Hereford) Limited | Real estate | 2022 |
| Commercial Street (Hereford) Management Company Limited | Households | 2004 |
| Common Farm Advisers LLP | | 2017 |
| Common Farm Highbridge Ltd | Agriculture & fishing | 2025 |
| Communion Limited | Professional & scientific | 2006 |
| Community Clubs Union Limited | Education | 2023 |
| Community First in Herefordshire & Worcestershire | Health & social care | 1990 |
| Compass for Life Limited | Extraterritorial | 2015 |
| Compass House (Bromsgrove) Ltd | Professional & scientific | 2002 |
| Compass Property Engineering Ltd | Professional & scientific | 2018 |
| Compass Property Investment Ltd | Real estate | 2018 |
| Compassion Works Ltd | Manufacturing | 2021 |
| Complete Fascia and Roofing Services Limited | Construction | 2014 |
| Complete Steel & Cladding Solutions Ltd | Construction | 2019 |
| Compocore Limited | Wholesale & retail | 2026 |
| Composite Cylinders UK Limited | Manufacturing | 2024 |
| Compressors and Washers Limited | Wholesale & retail | 2000 |
| Comvergence Limited | Extraterritorial | 2009 |
| Concept Glazing Systems Limited | Construction | 2003 |
| Coningsby Consulting Ltd | Professional & scientific | 2019 |
| Connect Air International Ltd | Transport & logistics | 2009 |
| Connectedwith Ltd | Manufacturing | 2024 |
| Conor Prosser Contracting Limited | Professional & scientific | 2018 |
| Conor Prosser Group Holdings Limited | Administrative & support | 2021 |
| Conquest Consultation and Security Limited | Administrative & support | 2014 |
| Conscious Coaching Ltd | Professional & scientific | 2019 |
| Consider IT Dunn Hereford Ltd | Construction | 2023 |
| Consider the Wondrous CIC | Arts & recreation | 2026 |
| Construction PM Services Ltd | Construction | 2021 |
| Consulteck Ltd | Professional & scientific | 2015 |
| Continuous Solutions Ltd | Professional & scientific | 2007 |
| Continuum IPR Limited | Administrative & support | 2021 |
| Continuum Life Sciences Holdings Limited | Financial services | 2020 |
| Continuum Research Holdings Limited | Professional & scientific | 2021 |
| Contour Consulting Ltd | Information & communication | 2014 |
| Contract Action Limited | Professional & scientific | 2005 |
| Control-Ai Hereford Ltd | Information & communication | 2026 |
| COO Creative Limited | Wholesale & retail | 2020 |
| Cooben Property Ltd | Real estate | 2025 |
| Cooke & Co Furniture Limited | Manufacturing | 2016 |
| Cooke Heating Ltd | Construction | 2021 |
| Cooke Property Trading Ltd | Real estate | 2026 |
| Cooling Projects Limited | Financial services | 2012 |
| Coombs Consulting Limited | Professional & scientific | 2023 |
| Cooped UP Campers Limited | Wholesale & retail | 2025 |
| Copper Beech Garden Design Limited | Administrative & support | 2006 |
| Core Base Infrastructure Ltd | Other services | 2026 |