| Case & Cover Ltd | Wholesale & retail | 2014 |
| Cases Limited | Manufacturing | 1981 |
| Casesift Limited | Information & communication | 2026 |
| Casian Transport Ltd | Transport & logistics | 2020 |
| Caspers WSM Ltd | Wholesale & retail | 2024 |
| Cassbow Traders Limited | Wholesale & retail | 2025 |
| Cassette Tapers Barber Shop Ltd | Other services | 2022 |
| Castle ST George Management (NO 2) Limited | Professional & scientific | 1992 |
| Catrisa Ltd | Extraterritorial | 2020 |
| Catvisa Ltd | Extraterritorial | 2020 |
| CBM Cricket Ltd | Wholesale & retail | 2024 |
| Cbmc Logistics Limited | Transport & logistics | 2017 |
| Ccuk (SW) Ltd T/A Titus Telecom Limited | Information & communication | 2018 |
| CE Truck Ltd | Transport & logistics | 2018 |
| Cebion RO Ltd | Transport & logistics | 2021 |
| Cecil House RTM Company Ltd | Households | 2018 |
| Cecil Road Management Limited | Households | 2006 |
| Cedar Barn Developments Ltd | Real estate | 2022 |
| Cedar Place (Haywood Village) Management Company Limited | Households | 2017 |
| Cedarwood Property Services (UK) Ltd | Other services | 2013 |
| Cedarwood Restoration Ltd | Administrative & support | 2024 |
| Celes Real Estate Limited | Professional & scientific | 2019 |
| Cellmede Limited | Construction | 2014 |
| Cenos Corporate Ltd | Manufacturing | 2024 |
| Cenos Performance Ltd | Manufacturing | 2024 |
| Central Perks Cafe FWS Ltd | Hospitality | 2025 |
| Centre Quay RTM Limited | Households | 2012 |
| Century 21 Mobiles Limited | Real estate | 2014 |
| Century Park Residents Management Company Limited | Households | 2022 |
| Ceroc Somerset Ltd | Arts & recreation | 2023 |
| Certa Professional Services Ltd | Information & communication | 2017 |
| Cesil Motors Limited | Wholesale & retail | 2017 |
| Ceycura Global Limited | Wholesale & retail | 2026 |
| Ceylon Arcadian Ltd | Administrative & support | 2025 |
| CF Security Ltd | Administrative & support | 2025 |
| CF Transport Services Ltd | Transport & logistics | 2024 |
| CH Training Solutions Ltd | Education | 2019 |
| Chancery House BDC Ltd | Professional & scientific | 2017 |
| Chandos Court (Management) Limited | Households | 1981 |
| Channel Explorer Ltd. | Agriculture & fishing | 2017 |
| Channell Engineering Services Ltd | Professional & scientific | 2024 |
| Chargrilled Limited | Hospitality | 2024 |
| Charis House Limited | Health & social care | 2004 |
| Charlee Baker Holistic Wellbeing Ltd | Other services | 2024 |
| Charlton Property and Estates Holdings Limited | Financial services | 2026 |
| Charlton Property and Estates Ltd | Real estate | 2019 |
| Charlton Property and Estates Spain Limited | Real estate | 2026 |
| Charlton Property Lettings Limited | Real estate | 2023 |
| Charlton Wills Limited | Professional & scientific | 2025 |
| Chassis Protection Services Ltd | Wholesale & retail | 2025 |
| Cheleanco Ltd | Hospitality | 2026 |
| Chelwood Weston Super Mare Management Company Limited | Households | 1988 |
| Cheryl Cooper Consultancy Ltd | Construction | 2021 |
| Chew Valley Bathrooms Limited | Extraterritorial | 2012 |
| Chew Valley GAS & OIL Ltd | Construction | 2011 |
| Chew Valley Heat Pumps Ltd | Construction | 2026 |
| Chhe Holdings Limited | Financial services | 2026 |
| Chhe Property Limited | Real estate | 2026 |
| Chiang Hammond Holdings Ltd | Real estate | 2018 |
| Chic Beauty Limited | Other services | 2025 |
| Chilled Heat Limited | Professional & scientific | 2007 |
| Chimex Heat & Solar Solutions Ltd | Construction | 2025 |
| China Trading (London) Limited | Manufacturing | 2007 |
| Chiron Property Holdings Limited | Real estate | 2024 |
| Chitemerere Ltd | Health & social care | 2025 |
| Chobhams Flats Weston-Super-Mare Management Company Limited | Households | 1985 |
| Chopstick 888 Ltd | Hospitality | 2018 |
| Chris Boocock Ltd | Health & social care | 2018 |
| Chris Chiswell Limited | Construction | 2010 |
| Chris Stott Catering Ltd | Hospitality | 2025 |
| Chrisola Entertainment Limited | Information & communication | 2009 |
| Christella Limited | Hospitality | 2012 |
| Christian James Estate Agents Ltd | Real estate | 2026 |
| Christopher"S House of Chocolates Ltd | Wholesale & retail | 2020 |
| Chuk Ltd | Construction | 2018 |
| Church Mansions Management Limited | Households | 1992 |
| Churchlands (Management) Co. Limited | Households | 1981 |
| Ciara Transport Ltd | Transport & logistics | 2025 |
| Circular Ventures Holdings Ltd | Financial services | 2025 |
| Ciri Industries Ltd | Transport & logistics | 2023 |
| Cisco Energy Services Limited | Administrative & support | 2002 |
| Citadel Road Ltd | Real estate | 2019 |
| City Centre Leisure Ltd | Administrative & support | 2024 |
| Citycharge Limited | Construction | 1988 |
| CJ Supported Living Ltd | Health & social care | 2022 |
| CJ Wrightson Limited | Wholesale & retail | 2017 |
| CJB IT Solutions Ltd | Information & communication | 2019 |
| CJL Leisure Vehicles Ltd | Wholesale & retail | 2016 |
| CJL Technical Services Ltd | Professional & scientific | 2017 |
| CJL2 Limited | Administrative & support | 2025 |
| CK1 Ltd | Transport & logistics | 2018 |
| CKL Accountants Limited | Professional & scientific | 2025 |
| CKM Truro Ltd | Financial services | 2024 |
| Claire Leandro Ltd | Professional & scientific | 2017 |
| Claredge House Residents Association Limited | Households | 2001 |
| Claremont North Somerset Ltd | Real estate | 2006 |
| Claremont Somerset Limited | Construction | 1999 |
| Clarence Place RTM Company Limited | Households | 2020 |
| Clarity Housekeeping Limited | Administrative & support | 2017 |
| Clarity Plastics Limited | Manufacturing | 2025 |