| Cambrian Butchers and Farm Shop Limited | Wholesale & retail | 2025 |
| Cambrian Cars and Commercials Limited | Wholesale & retail | 2024 |
| Cambrian V P Ltd | Professional & scientific | 2009 |
| Camcardiac Ltd | Professional & scientific | 2026 |
| Camden Car Wash Ltd | Other services | 2020 |
| Camel Cleaning Services Ltd | Administrative & support | 2023 |
| Cameley House Nominees Limited | Professional & scientific | 2009 |
| Cameron House Freehold Limited | Households | 2020 |
| Camo Hair (Cheltenham) Limited | Other services | 2020 |
| Camp Gardens Management Company Limited | Households | 2024 |
| Campaign Auto Ltd | Information & communication | 2025 |
| Campbell Design & Construction Ltd | Construction | 2014 |
| Campbell Performance Limited | Arts & recreation | 2022 |
| Campfire Agency Ltd | Professional & scientific | 2014 |
| Campfire Marketing Group Ltd | Financial services | 2019 |
| Campfire Marketing Ltd | Extraterritorial | 2021 |
| Campus Abroad Limited | Education | 2024 |
| Camrik Limited | Real estate | 2001 |
| CAN DO Results Limited | Administrative & support | 2010 |
| CAN Innovate Ltd | Information & communication | 2025 |
| Canactive Limited | Other services | 2019 |
| Canandjo Limited | Professional & scientific | 2008 |
| Candlyn Property Developments Limited | Extraterritorial | 1992 |
| Canfly Marketing Limited | Manufacturing | 2019 |
| Cannibal Films II Limited | Administrative & support | 2016 |
| Canning Court Management Company Limited | Households | 1990 |
| Cannonical LLP | | 2023 |
| Canny Conversations Limited | Professional & scientific | 2019 |
| Canopy OPS Limited | Professional & scientific | 2025 |
| Cantera Project Management Ltd | Professional & scientific | 2024 |
| Cantwell Green Limited | Professional & scientific | 2024 |
| Capa Properties Limited | Real estate | 2026 |
| Capably Group Ltd | Education | 2026 |
| Capaldi Consulting Limited | Professional & scientific | 2018 |
| Cape Hockley Consulting Limited | Administrative & support | 2011 |
| Cape Homes (73/75 New ST) Ltd | Construction | 2018 |
| Cape Homes (Becks Orchard) Ltd | Construction | 2024 |
| Cape Homes (Carlton Gate) Ltd | Real estate | 2024 |
| Cape Homes (Coombe Hill) Limited | Construction | 2026 |
| Cape Homes (Down Hatherley) Ltd | Construction | 2024 |
| Cape Homes (FL) Limited | Construction | 2026 |
| Cape Homes (GR) Ltd | Construction | 2024 |
| Cape Homes (Hamilton ST) Ltd | Construction | 2024 |
| Cape Homes (Haywards Road) Limited | Construction | 2014 |
| Cape Homes (Horsbere Drive) Ltd | Construction | 2024 |
| Cape Homes (KAW) Limited | Construction | 2026 |
| Cape Homes (Leckhampton Road) Limited | Construction | 2021 |
| Cape Homes (Moat) Limited | Construction | 2026 |
| Cape Homes (the Hambletts) Ltd | Construction | 2023 |
| Cape Homes (WH) Limited | Construction | 2026 |
| Cape Homes Limited | Construction | 2000 |
| Capella Ventures 2 LP | | 2011 |
| Capella Ventures 3 LP | | 2013 |
| Capella Ventures LP | | 2008 |
| Capfield Developments Limited | Financial services | 2016 |
| Capiloan Finance Ltd | Financial services | 2021 |
| Capital Gateway Ltd | Financial services | 2025 |
| Capstone Property Investments Ltd | Real estate | 2020 |
| Capsule Insurance Services Limited | Financial services | 2021 |
| Captiva Properties Limited | Real estate | 1992 |
| Captive Edge Ltd | Wholesale & retail | 2025 |
| Capture Success Ltd | Financial services | 1984 |
| Caradoc Country Cottages Ltd | Hospitality | 2026 |
| Caravan Hire for ANY Event Ltd | Hospitality | 2023 |
| Caravan Site Finder Ltd | Extraterritorial | 2021 |
| Carbay 1 UK Limited | Wholesale & retail | 2021 |
| Carblah Limited | Professional & scientific | 2025 |
| Carbon Fiber Generation Ltd | Wholesale & retail | 2010 |
| Carbon Lion Property Limited | Real estate | 2023 |
| Carbon VIP Limited | Wholesale & retail | 2003 |
| Carbonai (Cheltenham) Ltd | Information & communication | 2014 |
| Carbonflame Limited | Information & communication | 2006 |
| Carbrey Accommodation Ltd | Health & social care | 2015 |
| Carbrey Care Hempsted Ltd | Health & social care | 2020 |
| Carbrey Care Ltd | Health & social care | 2014 |
| Carbrey Group Ltd | Extraterritorial | 2014 |
| Carbrey Housing Ltd | Health & social care | 2011 |
| Carbrey Properties Ltd | Real estate | 2019 |
| Card CON Ltd | Administrative & support | 2025 |
| Cardiff City Access Ltd | Construction | 2022 |
| Cardin Ltd | Manufacturing | 2014 |
| CARE2NURSE Domiciliary Care Limited | Health & social care | 2021 |
| Careforu Limited | Health & social care | 2003 |
| Carenza Commercial Investments Limited | Construction | 2025 |
| Cargo Conference (Icic) Limited | Administrative & support | 2019 |
| Caring for Communities and People | Health & social care | 1994 |
| Carlain Property Limited | Extraterritorial | 2012 |
| Carleston Properties Limited | Real estate | 2017 |
| Carlton Gate (Cheltenham) Ltd | Real estate | 2020 |
| Carlton Professional International Limited | Other services | 2020 |
| Carmen Holdings Limited | Financial services | 2022 |
| Carmen Roberts Counselling Limited | Health & social care | 2019 |
| Carmichael Holdings Limited | Financial services | 2021 |
| Carn Nicholas Holdings Limited | Real estate | 2021 |
| Carn Nicholas Solar Limited | Energy | 2020 |
| Caroline Cook PA Ltd | Administrative & support | 2014 |
| Caroline Wallace Sculptures Limited | Arts & recreation | 2015 |
| Caroline Whittome Soft Tissue Therapy Ltd | Health & social care | 2019 |
| Carp Hunter Ltd | Wholesale & retail | 2025 |
| Carpenter & SON Construction Limited | Construction | 2013 |