| Cathay Pacific Management Ltd | Information & communication | 2022 |
| Cathay Properties Limited | Real estate | 1999 |
| Cathedral Labels Limited | Wholesale & retail | 2025 |
| Cathedral Products (UK) Limited | Wholesale & retail | 1997 |
| Cathedral Taxis Hereford Ltd | Transport & logistics | 2023 |
| Catherine Conaty Soft Furnishings Ltd | Manufacturing | 2018 |
| Catherine Griffiths (Consultancy) Limited | Professional & scientific | 2015 |
| Catherine Lutman Design Limited | Other services | 2017 |
| Catherines Court Management Limited | Households | 1997 |
| Catherinesstudio Ltd | Professional & scientific | 2025 |
| Cathodia Ltd | Wholesale & retail | 2022 |
| Cathodic Protection Engineering Limited | Manufacturing | 2013 |
| Cathodic Protection Services Limited | Construction | 1997 |
| Catholicon Solutions Limited | Information & communication | 2025 |
| Cathy Burkett Bookkeeping Limited | Professional & scientific | 2011 |
| Catmonkey Limited | Professional & scientific | 2018 |
| Cato Estates (Midlands) Ltd | Real estate | 2025 |
| Caton Hornby Holdings Ltd | Financial services | 2024 |
| Caton Hornby Pharma Ltd | Wholesale & retail | 2024 |
| Catshill Food & Wine Ltd | Wholesale & retail | 2020 |
| Catshill Village Development Limited | Construction | 2019 |
| Cattaneo Corporate Finance Solutions Limited | Professional & scientific | 2011 |
| Cattaneo LLP | | 2005 |
| Cattle Egret Family Property Group Limited | Real estate | 2025 |
| Cattleya Transport Ltd | Transport & logistics | 2018 |
| Catton Cables Limited | Manufacturing | 2015 |
| Catton Control Cables Limited | Manufacturing | 1958 |
| Catton Holdings Limited | Financial services | 1995 |
| Catton Manufacturing Group Limited | Financial services | 2023 |
| Cauca Transport Ltd | Transport & logistics | 2018 |
| Caucus Connect Limited | Manufacturing | 2018 |
| Caucus Innovation Limited | Manufacturing | 2015 |
| Caulva Properties Limited | Real estate | 2016 |
| Cauri Ltd | Information & communication | 2015 |
| Causeway Barber Ltd | Other services | 2024 |
| Causeway Kebab Limited | Hospitality | 2019 |
| Causeway Trading Ltd | Wholesale & retail | 2019 |
| CAV Groundworks Ltd | Construction | 2019 |
| CAV House 333 LP | | 2014 |
| Cavalier Codeworks Ltd | Information & communication | 2024 |
| Cavalier Country Ltd | Wholesale & retail | 2022 |
| Cavalry Hospitality Ltd | Hospitality | 2023 |
| Cave Compliance Ltd | Professional & scientific | 2024 |
| Cave Edge Industries Limited | Manufacturing | 2024 |
| Cavear Ltd | Wholesale & retail | 2021 |
| Cavendish Estates Ream Ltd | Real estate | 2022 |
| Caversham Corporation Ltd | Real estate | 2025 |
| Cavilor Limited | Wholesale & retail | 2025 |
| Cawley Chiropody Ltd | Health & social care | 2012 |
| Cawpole Limited | Wholesale & retail | 1993 |
| Cawser Cars Limited | Wholesale & retail | 2025 |
| CAY22 Ltd | Transport & logistics | 2026 |
| Cayman Group Limited | Wholesale & retail | 2018 |
| Cayson Global Limited | Information & communication | 2025 |
| Caza Enterprises Ltd | Real estate | 2013 |
| CB Accounting & Consulting Ltd | Professional & scientific | 2020 |
| CB Air BNB Specialist Ltd | Administrative & support | 2025 |
| CB Cable Clips Limited | Extraterritorial | 2019 |
| CB Commissioning Ltd | Construction | 2020 |
| CB Communications Group Ltd | Education | 2018 |
| CB Construction (Midlands) Ltd | Administrative & support | 2023 |
| CB Design Services Limited | Professional & scientific | 2003 |
| CB Driving Ltd | Transport & logistics | 2019 |
| CB Energy Services Ltd | Construction | 2024 |
| CB Governance Limited | Education | 2023 |
| CB Heating Plumbing Ltd | Construction | 2022 |
| CB Launchsuite Limited | Information & communication | 2026 |
| CB Legal Advisory Limited | Professional & scientific | 2017 |
| CB Lozells Limited | Hospitality | 2026 |
| CB Mowers Limited | Agriculture & fishing | 2018 |
| CB Print Concept Ltd | Manufacturing | 2021 |
| CB Property (Midlands) Limited | Construction | 2021 |
| CB Skip Hire Limited | Administrative & support | 2026 |
| CB Turnaround Ltd | Administrative & support | 2016 |
| CB Wolverhampton Ltd | Hospitality | 2022 |
| Cbarr Properties Ltd | Real estate | 2020 |
| CBB Services Ltd | Health & social care | 2022 |
| Cbbwellness Ltd | Arts & recreation | 2014 |
| CBE Plus Ltd | Professional & scientific | 2000 |
| Cbkorsah and Family Biioepic by GOD Almightys Power Through Christ Jesus Limited | Financial services | 2026 |
| CBL Bedding Ltd | Wholesale & retail | 2021 |
| CBL Distribution Limited | Wholesale & retail | 2014 |
| Cbmuk Limited | Wholesale & retail | 2025 |
| CBN Consultancy & Solutions Ltd | Professional & scientific | 2025 |
| CBP Universal Ltd | Real estate | 2024 |
| Cbr-Customs Limited | Wholesale & retail | 2023 |
| CBS ( Birmingham ) Limited | Construction | 2021 |
| CBS (UK) Ltd | Construction | 2013 |
| CBS Anytime Ltd | Administrative & support | 2021 |
| CBS Investments Homes Limited | Real estate | 2025 |
| CBS Recruitment Limited | Administrative & support | 2025 |
| CBS Vehicle Solutions Ltd | Wholesale & retail | 2023 |
| Cbsj Property Limited | Real estate | 2026 |
| CBT & Psychotherapy Ltd | Health & social care | 2022 |
| CBT Global Limited | Real estate | 2018 |
| Cbtt Ltd | Health & social care | 2025 |
| CBU Distribution Ltd | Wholesale & retail | 2023 |
| CC (18) Limited | Hospitality | 2026 |
| CC 2047 Limited | Hospitality | 2021 |
| CC 36 Limited | Hospitality | 2022 |