| Campbell & Conod Ltd | Professional & scientific | 2019 |
| CAN BE the One Ltd | Wholesale & retail | 2024 |
| Candela Healthcare Ltd | Health & social care | 2020 |
| Candrow Limited | Information & communication | 2021 |
| Canon Bridge Barns Services Ltd | Households | 2019 |
| Canon Pyon Residents Company Limited | Real estate | 1983 |
| Cantilupe Consultancy Ltd | Professional & scientific | 2022 |
| Cantilupe Management Services Limited | Households | 2020 |
| Cantilupe Mews Limited | Households | 2004 |
| Canuk Limited | Real estate | 2025 |
| Canwood Art Gallery and Sculpture Park Ltd | Wholesale & retail | 2024 |
| Capital Sport Limited | Administrative & support | 2002 |
| Caple Forge Ltd | Manufacturing | 2011 |
| Caple Ltd. | Manufacturing | 1997 |
| Caplor Horizons | Professional & scientific | 2014 |
| Caplor Limited | Households | 2006 |
| Caplor Power Generation LLP | | 2014 |
| Capricorn International Ltd | Other services | 2017 |
| Car Air Limited | Wholesale & retail | 2004 |
| Car Call Ltd | Administrative & support | 2008 |
| Carbon Neutral Wood Fuels Limited | Agriculture & fishing | 2010 |
| Cardale Enterprises Limited | Real estate | 2012 |
| Carlie Creates Ltd | Manufacturing | 2022 |
| Carmarthen Warehousing Limited | Real estate | 1982 |
| Carol Davies Ltd | Wholesale & retail | 2005 |
| Carol Peace Ltd | Arts & recreation | 2006 |
| Caroline Penn Holdings Limited | Financial services | 2022 |
| Caroline Waddams Communications Limited | Professional & scientific | 2019 |
| Carpigiani U.K. Limited | Manufacturing | 1994 |
| Carriages Restaurant Limited | Hospitality | 2023 |
| Carrot & Wine Stores Limited | Wholesale & retail | 2017 |
| Cartersmithuk Ltd | Wholesale & retail | 2022 |
| Caruthers Limited | Professional & scientific | 2018 |
| Cascade Digital Solutions Ltd | Information & communication | 2024 |
| Cassandra Connolly Ltd | Professional & scientific | 2021 |
| Castello Warminster Limited | Hospitality | 2018 |
| Castle and Ferrers Street Limited | Real estate | 2011 |
| Castle Cliffe Holidays Limited | Hospitality | 2014 |
| Castle Close (Eardisley) Residents Association Limited | Households | 1996 |
| Castle Farm Eardisley Limited | Households | 1993 |
| Castle Frome Contracting Limited | Construction | 2018 |
| Castle House Hotel Limited | Extraterritorial | 1995 |
| Castle Nibole Limited | Water & waste | 2009 |
| Castle Quay (Hereford) Limited | Health & social care | 2006 |
| Castle Yurts Limited | Manufacturing | 2008 |
| Castleton Consultancy Ltd | Real estate | 2018 |
| Castlewood (Pembrokeshire) Limited | Hospitality | 2019 |
| Castrostead Ltd | Financial services | 2024 |
| Catcher Media Limited | Extraterritorial | 2006 |
| Catcher Media Social C.I.C. | Education | 2012 |
| Cathedral Carpets Ltd | Construction | 2017 |
| Cathedral Cars (Hereford) Limited | Wholesale & retail | 2020 |
| Cathedral Mortgages Ltd | Financial services | 2026 |
| Cathedral View Investments Limited | Real estate | 2013 |
| Catherine Street Management Company (Hereford) Limited | Households | 2021 |
| Cato's Barn Ltd | Hospitality | 2021 |
| Cats Whiskers Boarding Cattery Ltd | Other services | 2018 |
| Cavitronics Ltd | Information & communication | 2024 |
| Cavity Wall and Loft Clearance Solutions Ltd | Construction | 2014 |
| Caxton Lodge Residents Company Limited | Households | 2016 |
| Caylo Limited | Other services | 2014 |
| Cazian UK Limited | Hospitality | 2004 |
| CB Development (Hereford) Ltd | Construction | 2012 |
| CB Lock Limited | Wholesale & retail | 2020 |
| CB Supply Solutions Ltd | Professional & scientific | 2026 |
| CBC Holdings (Hereford) Ltd | Financial services | 2022 |
| CBN Resources Ltd | Other services | 2017 |
| CC Educational Psychology Limited | Education | 2024 |
| CC Medical Solutions Ltd | Health & social care | 2025 |
| CC Monfy Limited | Real estate | 2021 |
| Cc's Hair & Beauty Ltd | Other services | 2025 |
| CCP Propco Limited | Real estate | 2018 |
| Ccswl Limited | Real estate | 2022 |
| Ccube Capital Ltd | Real estate | 2021 |
| CD Scaffolding Hereford Limited | Construction | 2019 |
| Cdlrg Limited | Arts & recreation | 2025 |
| CE Yardley Limited | Professional & scientific | 2020 |
| Cedarcroft Limited | Real estate | 1999 |
| Cedarwood Tree Care Limited | Agriculture & fishing | 2009 |
| Cejn UK Limited | Wholesale & retail | 2010 |
| Celtic Canoes Ltd | Administrative & support | 2025 |
| Celtic Safety Ltd | Administrative & support | 2013 |
| Celtic Stunts Limited | Arts & recreation | 2016 |
| Celyn Office Services Limited | Administrative & support | 2009 |
| Centigrade Production House Ltd | Administrative & support | 2026 |
| Central Engineering (Hereford) Limited | Manufacturing | 2001 |
| Central England Proficiency Testing Limited | Administrative & support | 2003 |
| Central Garage (Hereford) Ltd | Construction | 2018 |
| Central Roofing (Holdings) Limited | Professional & scientific | 2004 |
| Central Roofing (South Wales) Limited | Construction | 2004 |
| Central Roofing and Building Services Limited | Construction | 1999 |
| Central Roofing Bidco Limited | Professional & scientific | 2021 |
| Central Roofing Group (UK) Limited | Construction | 2016 |
| Central Roofing Topco Limited | Professional & scientific | 2021 |
| Centurian Research Group Limited | Other services | 2021 |
| Centurion Walk (Hereford) Management Company Limited | Households | 2005 |
| CEO Katie Ltd | Professional & scientific | 2025 |
| Certainly Flamers Limited | Agriculture & fishing | 2021 |
| Certainly Trees Limited | Agriculture & fishing | 2010 |
| Certainly Wood Limited | Agriculture & fishing | 2005 |