| Castle Van Hire Ltd | Extraterritorial | 2025 |
| Castle Vehicle Hire Limited | Administrative & support | 2025 |
| Castle View Design Limited | Professional & scientific | 2013 |
| Caswell Consulting Services Limited | Professional & scientific | 2022 |
| Cat Consultancy Ltd | Health & social care | 2015 |
| CATERING365 Limited | Professional & scientific | 1983 |
| Caterset Limited | Hospitality | 1994 |
| Catteralls of Southam Limited | Transport & logistics | 1995 |
| Cavago Technologies Limited | Information & communication | 2022 |
| Cavernton Limited | Wholesale & retail | 2025 |
| CB IP Ltd | Professional & scientific | 2023 |
| CB Roofing & Building Limited | Construction | 2021 |
| CB Roofing (Leamington) Limited | Construction | 2017 |
| CBG Consulting & Information Ltd | Administrative & support | 2008 |
| CBW Customs Limited | Transport & logistics | 2022 |
| CBW Group Holdings Limited | Professional & scientific | 2021 |
| CBW International Limited | Transport & logistics | 2021 |
| CBW Packaging Limited | Transport & logistics | 2021 |
| CBW Resources Limited | Transport & logistics | 2010 |
| CC Telco Ltd | Professional & scientific | 2025 |
| Ccholmes Limited | Wholesale & retail | 2024 |
| CCV (Featherstone) LLP | | 2023 |
| CCV Beldray LLP | | 2023 |
| CCV Dorchester LLP | | 2025 |
| CCV LLP | | 2017 |
| CCV Whitehall LLP | | 2024 |
| CCV Willenhall LLP | | 2025 |
| CDE Consulting Limited | Professional & scientific | 2025 |
| CDM Construction Solutions Limited | Professional & scientific | 2016 |
| Cena & Co. Watches Ltd | Wholesale & retail | 2026 |
| Central Ajax Football Club Limited | Arts & recreation | 1991 |
| Central Signs & Graphics Ltd | Administrative & support | 2016 |
| Central Ventilations Limited | Construction | 2016 |
| Centre Screen Photography Limited | Professional & scientific | 1989 |
| Cerberus Solutions Ltd | Administrative & support | 2021 |
| Certified Energy Assessors Ltd | Administrative & support | 2025 |
| Cewe Instrument Limited | Wholesale & retail | 1991 |
| Cewe Limited | Manufacturing | 1950 |
| CFS Aeroproducts Ltd | Manufacturing | 2012 |
| CFS Mission Systems Ltd | Manufacturing | 2021 |
| CGV 1 Ltd | Financial services | 2022 |
| CGV 2 Ltd | Financial services | 2022 |
| CGV 3 Ltd | Financial services | 2022 |
| CGV 4 Ltd | Financial services | 2022 |
| CHA (2005) Limited | Professional & scientific | 2005 |
| Chacma Limited | Professional & scientific | 2001 |
| Chaddesley Self Storage Limited | Real estate | 2019 |
| Chain GRP Holdings UK Limited | Construction | 2011 |
| Chainchaser Limited | Administrative & support | 2020 |
| Championsys Limited | Information & communication | 2023 |
| Chandler Engineering Consultancy Limited | Professional & scientific | 2025 |
| Change IT (UK) Limited | Construction | 2011 |
| Change IT Commercial Limited | Construction | 2021 |
| Chapman Bayley Ltd | Real estate | 2024 |
| Chapmans Drinks Limited | Manufacturing | 2014 |
| Chappiefanti Limited | Professional & scientific | 2019 |
| CHAPTER2 Group Ltd | Professional & scientific | 2018 |
| Charanjit Insolvency & Recovery Training Ltd | Education | 2025 |
| Charge Traders Ltd | Information & communication | 2024 |
| Chargepoint Dynamics Limited | Administrative & support | 2010 |
| Charlack Consultancy Ltd | Construction | 2015 |
| Charlecote Limited | Professional & scientific | 2004 |
| Charles Court Residents Association Warwick Limited | Households | 2023 |
| Charles George Ltd | Hospitality | 2024 |
| Charles H.Allen Limited | Professional & scientific | 1954 |
| Charles T.Dobson Limited | Real estate | 1959 |
| Charlie Nails Salon Limited | Other services | 2025 |
| Charpter One Homes Ltd | Health & social care | 2023 |
| Charrington Oak Ltd | Real estate | 2010 |
| Chase Meadow Centre Partners C.I.C. | Real estate | 2013 |
| Chase Meadow Community Centre Ltd | Arts & recreation | 2010 |
| Chase Meadow Opticians Ltd | Wholesale & retail | 2020 |
| Chawn Limited | Information & communication | 2014 |
| Cheadle Modern Health Gym Limited | Arts & recreation | 2012 |
| Checked Design Ltd | Professional & scientific | 2025 |
| Chedhams Yard Trust | Arts & recreation | 2010 |
| Cheeky Chimps TV Limited | Information & communication | 2015 |
| Chef Wayne Ltd | Professional & scientific | 2025 |
| Chemotechnique Diagnostics Limited | Professional & scientific | 2009 |
| Cheney 2025 Ltd | Financial services | 2025 |
| Cheney Properties Ltd | Real estate | 2025 |
| Cherry Lane Gardens Eckington LLP | | 2025 |
| Cherry Lane Gardens Management Company Ltd. | Households | 2026 |
| Cherry Street Productions Limited | Arts & recreation | 2007 |
| Chesford Bridge House Limited | Real estate | 2016 |
| Chester Flying School Ltd | Transport & logistics | 2020 |
| Chesterfield Guest House Limited | Hospitality | 2025 |
| Chesterton Utilities Limited | Extraterritorial | 2009 |
| Chetmart Limited | Hospitality | 2014 |
| Chicken House Publishing Limited | Information & communication | 2000 |
| Children Safety Experts Limited | Administrative & support | 2008 |
| Chillimint Holdings Limited | Professional & scientific | 2021 |
| Chillimint Investments Ltd | Real estate | 2011 |
| Chilly Sheep Ltd | Information & communication | 2010 |
| Chip Shed Warwick Limited | Hospitality | 2018 |
| Chiron Stables Limited | Other services | 2019 |
| Chiron Werke UK Limited | Financial services | 2012 |
| Chiroprop Ltd | Financial services | 2016 |
| CHJ Services Ltd | Other services | 2026 |
| Choosespeed Ltd | Information & communication | 2022 |