| Clearwater Wealth Management Ltd | Financial services | 2026 |
| Cleeve Coffee Cabin Ltd | Hospitality | 2025 |
| Cleeve Handyman & Garden Services Ltd | Other services | 2021 |
| Cleeve Lake Court (Freehold) Limited | Professional & scientific | 1993 |
| Cleeve Maintenance Services Ltd | Manufacturing | 2020 |
| Cleeve Old BNK Ltd | Hospitality | 2024 |
| Cleeve Picture Framing Limited | Manufacturing | 2014 |
| Cleeve Residential Lettings Ltd | Real estate | 2014 |
| Cleeve School | Education | 2011 |
| Cleeve School Enterprises Limited | Education | 2012 |
| Cleeve Services Limited | Information & communication | 2013 |
| Cleeve Solutions Limited | Professional & scientific | 2018 |
| Cleeve Storage Ltd | Real estate | 2017 |
| Cleeve Systems Limited | Information & communication | 1995 |
| Cleeve Test Systems Ltd | Professional & scientific | 2026 |
| Cleeve View Holdings Ltd | Real estate | 2015 |
| Cleevelands IT Limited | Information & communication | 2011 |
| Cleevelands Residents Association Cheltenham Limited | Other services | 1997 |
| Cleeveline Taxis Ltd | Transport & logistics | 2020 |
| Cleevely E V Mobile Ltd | Wholesale & retail | 2021 |
| Cleevely Electric Vehicles Ltd | Wholesale & retail | 2018 |
| Cleevely Electrics Ltd | Construction | 2010 |
| Cleevely Motors Limited | Wholesale & retail | 1962 |
| Cleevemont (Cheltenham) Limited | Households | 1977 |
| Cleevemount Properties Ltd | Financial services | 2023 |
| Cleevetech Limited | Information & communication | 2025 |
| Cleevewood Aviation Limited | Transport & logistics | 2001 |
| Cleevewood Properties Limited | Real estate | 1991 |
| Clement Academy Ltd | Education | 2026 |
| Clementine Cafes Limited | Hospitality | 2018 |
| Clementine Cheltenham Limited | Hospitality | 2018 |
| Clementine Gloucester Limited | Hospitality | 2018 |
| Clements Tax Associates Limited | Professional & scientific | 2017 |
| Clemily Consulting Ltd | Professional & scientific | 2018 |
| Clemshaw Limited | Households | 1981 |
| Clent Finance Limited | Financial services | 1997 |
| Cleonique Tech Limited | Transport & logistics | 2025 |
| Clermont Enterprises Limited | Administrative & support | 2016 |
| Clevatech Ltd | Professional & scientific | 2017 |
| Clevertech Limited | Information & communication | 2000 |
| Clevertech Solutions Limited | Information & communication | 2008 |
| Click Herschel Limited | Construction | 2017 |
| Click Insight Limited | Information & communication | 2015 |
| Click Intelligence Trustees Limited | Administrative & support | 2022 |
| Client Care Options Central Limited | Financial services | 2014 |
| Client Care Options Limited | Financial services | 2013 |
| Client MAX Limited | Information & communication | 2024 |
| Cliff Associates Limited | Financial services | 2007 |
| Clifton Aviation Limited | Transport & logistics | 2012 |
| Clifton Cameras Limited | Wholesale & retail | 2006 |
| Clifton Cameras Property Ltd | Real estate | 2020 |
| Clifton Community Housing Ltd | Construction | 2019 |
| Clifton Fashion Agency Limited | Transport & logistics | 1986 |
| Clifton Investment Management Limited | Financial services | 2020 |
| Clint Parker Electrical Services Limited | Construction | 2006 |
| Clipper Cartel Ltd | Other services | 2022 |
| CLM Consulting Ltd | Professional & scientific | 2024 |
| Cloacina Services Limited | Water & waste | 2020 |
| Clock Stoppers Cleaning Services Ltd | Administrative & support | 2016 |
| Clock Stoppers Limited | Administrative & support | 2005 |
| Clop Holdings Limited | Financial services | 2026 |
| Closed Stone Limited | Professional & scientific | 2014 |
| Closed Sundays Ltd | Other services | 2013 |
| Cloud Strategy Limited | Information & communication | 2010 |
| Cloudbase Technologies Limited | Information & communication | 2025 |
| Cloudbreak Digital Ltd | Professional & scientific | 2021 |
| Cloudclevr Limited | Information & communication | 1998 |
| Cloudrise Emea Ltd | Administrative & support | 2022 |
| Clouds Reach Investments Limited | Financial services | 2025 |
| Cloudshill Limited | Health & social care | 2010 |
| Cloudtamers Limited | Information & communication | 2008 |
| Clover Climb Ltd | Wholesale & retail | 2024 |
| Clover House FIC | Professional & scientific | 2025 |
| Clover Lloyd Design Limited | Professional & scientific | 1988 |
| Cloverberry Estates Limited | Hospitality | 2024 |
| Clubluk Ltd | Other services | 2017 |
| CM Building Services Limited | Construction | 2024 |
| CM Stays Ltd | Real estate | 2026 |
| Cmaster Ltd | Administrative & support | 2015 |
| CMB Designs Limited | Professional & scientific | 2014 |
| CME Contractors Ltd | Construction | 2015 |
| CMJ Capital LLP | | 2026 |
| CMJ Idris Ltd | Real estate | 2024 |
| CMJ Investment Ltd | Real estate | 2021 |
| CN Education Limited | Education | 2013 |
| CNH2016 Limited | Manufacturing | 2007 |
| COA Performance Limited | Health & social care | 2025 |
| Coach House Services Cheltenham Ltd | Wholesale & retail | 2015 |
| Coach&Thrive Ltd | Education | 2023 |
| Coaching With MIA Limited | Other services | 2017 |
| Coaley Peak Ltd | Information & communication | 2019 |
| Coalfire Systems Limited | Professional & scientific | 2013 |
| Coalition for Inclusive Capitalism Limited | Professional & scientific | 2017 |
| Coast & Country Developments Ltd | Construction | 2023 |
| Coastal Harbour Ltd | Arts & recreation | 2011 |
| Coastal Kickers Ltd | Education | 2025 |
| Coastline Inns Limited | Hospitality | 2021 |
| Coates Consultants Limited | Wholesale & retail | 2017 |
| Coates Mill Medical Limited | Professional & scientific | 2015 |
| Coats Investment & Development Ltd | Extraterritorial | 2026 |