| Chartered Financial Solutions Limited | Financial services | 2008 |
| Chase James Developments Limited | Real estate | 2024 |
| Chasura Solutions Ltd | Information & communication | 2024 |
| CHD Design Works Ltd | Professional & scientific | 2007 |
| Chdc Care Co Ltd | Financial services | 2023 |
| Cheema Singh Limited | Real estate | 2018 |
| Chef in the Home Ltd | Hospitality | 2017 |
| Chef Wang Limited | Hospitality | 2018 |
| Chemi-Compliance Limited | Professional & scientific | 2011 |
| Chemovation Limited | Professional & scientific | 2004 |
| Cherwell 2014 Limited | Wholesale & retail | 2014 |
| Chesford Legal Limited | Professional & scientific | 2022 |
| Chester Grima Limited | Construction | 2023 |
| Chester Thomas Ltd | Construction | 2017 |
| Chestnut Grove Management Company Limited | Households | 1993 |
| Chew IT Design Limited | Professional & scientific | 2012 |
| Chez Rama Limited | Wholesale & retail | 2017 |
| Children's Physio on the Move Limited | Health & social care | 2015 |
| Childrens Allergy Ltd | Health & social care | 2009 |
| Chillitree Consulting Limited | Professional & scientific | 2012 |
| Chimera Automation Solutions Ltd | Professional & scientific | 2018 |
| China Oxford Scholarship Fund | Education | 2004 |
| Chiropractically Yours Ltd | Health & social care | 2015 |
| Chloe’S Connies Ltd | Agriculture & fishing | 2022 |
| CHM (Warwick) Limited | Real estate | 2008 |
| Choosist Ltd | Information & communication | 2014 |
| Chris Aubrey Financial Services Limited | Financial services | 2018 |
| Christian Watch | Information & communication | 2002 |
| Christopher TEW Limited | Construction | 2014 |
| Chrome Yellow Arts Ltd | Wholesale & retail | 2013 |
| Chrysanthe Galleries Ltd | Wholesale & retail | 2024 |
| CHS Developments Limited | Financial services | 1934 |
| Churton House Management Company Limited | Households | 1986 |
| Cielo Energy Ltd | Professional & scientific | 2019 |
| Cigh Ltd | Financial services | 2024 |
| Cinema Mougins Limited | Information & communication | 2023 |
| Cirell & Lewis Limited | Professional & scientific | 2025 |
| Citizens' Purity League Limited | Wholesale & retail | 2008 |
| Citta Transformational Life Coaching Limited | Education | 2020 |
| CJ Bramley Ltd | Wholesale & retail | 2026 |
| CJ Design Ltd | Professional & scientific | 2025 |
| CJR Welding and Fabrication Limited | Manufacturing | 2022 |
| CJW Property & Garden Services Ltd | Construction | 2026 |
| CK Property Stash Ltd | Real estate | 2024 |
| CK Quality (Midlands) Limited | Other services | 2020 |
| CKB Hospitality Limited | Hospitality | 2025 |
| Ckme Ltd | Real estate | 2024 |
| Clarence House Management Company Limited | Households | 1997 |
| Clarendon Capital Investments Limited | Real estate | 2023 |
| Clarendon Creations Ltd | Construction | 2021 |
| Clarendon Crescent Dell Limited | Households | 1989 |
| Clarendon Cubs (Warwick) Ltd | Health & social care | 2026 |
| Clarendon Cubs Ltd | Health & social care | 2024 |
| Clarendon Finance Limited | Real estate | 2003 |
| Clarendon House Dental Centre Ltd | Health & social care | 2013 |
| Clarendon Place Investments Limited | Real estate | 2014 |
| Clarendon Solutions Limited | Information & communication | 2021 |
| Clarendon Square Limited | Real estate | 2017 |
| Clarendon Street (Leamington Spa) Management Company Limited | Households | 2011 |
| Clarendon Ventures Ltd | Real estate | 2026 |
| CLARENDON22 Ltd | Information & communication | 2022 |
| CLARENDON5 Ltd | Real estate | 2021 |
| Claret Consultancy Ltd | Information & communication | 2023 |
| Clarity Accelerated Limited | Administrative & support | 2013 |
| Clarke Utilities Limited | Construction | 2023 |
| Classic Restorations Limited | Wholesale & retail | 2020 |
| Classicus Partners Ltd | Administrative & support | 2022 |
| Clay Automotive Limited | Wholesale & retail | 2025 |
| Clay Management Limited | Other services | 2013 |
| Clay Wealth Management Limited | Financial services | 2013 |
| Clayton CC Limited | Professional & scientific | 2005 |
| Clayton Classic Cars Limited | Manufacturing | 2017 |
| CLB Investment Properties Limited | Real estate | 2025 |
| Cleangrip Limited | Manufacturing | 2018 |
| Cleaning High-End Ltd | Administrative & support | 2025 |
| Cleaning Services Coventry Limited | Administrative & support | 2019 |
| Clear Contract Services Ltd | Administrative & support | 2008 |
| Clear LAB Tech Limited | Professional & scientific | 2024 |
| Clear Space Living Ltd | Education | 2019 |
| Clear Surfaces Cleaning Ltd | Administrative & support | 2025 |
| Clearance Warehouse Co. Ltd | Wholesale & retail | 2026 |
| Clearfin Group Ltd | Information & communication | 2020 |
| Clearly Recruitment Limited | | 2009 |
| Clearly Simpler Limited | Information & communication | 2017 |
| Clearpoint Neuro UK Ltd | Manufacturing | 2020 |
| Clearwater Consortium Limited | Administrative & support | 2017 |
| Clearwater Industrial Limited | Administrative & support | 2001 |
| Clearwater Technologies Ltd. | Manufacturing | 1997 |
| Clearys Boxing Community Interest Company | Education | 2023 |
| Cleaver Logistics Limited | Financial services | 2018 |
| Clemens Cutz Ltd | Other services | 2025 |
| Clerkenwell Estates 2 Limited | Real estate | 2019 |
| Clerkenwell Estates Limited | Real estate | 2019 |
| Clgr Limited | Administrative & support | 2013 |
| Click OK (Warwickshire) Limited | Wholesale & retail | 2013 |
| Cliff House (Biddulph Road) Management Limited | Households | 1972 |
| Cliffordwelch Ltd | Information & communication | 2026 |
| Clifton Lodge (Leamington Spa) Management Ltd | Households | 2024 |
| Clinical Comms Group Ltd | Professional & scientific | 2022 |
| Clintplan Limited | Manufacturing | 1982 |