| Campion Court (Stmarychurch) Management Company Limited | Households | 2014 |
| Camsox Enterprises Limited | Professional & scientific | 1999 |
| CAN of Clean Limited | Administrative & support | 2019 |
| Capable Strides Ltd | Professional & scientific | 2020 |
| Cape and Cove Ltd | Other services | 2020 |
| Capri Hotel Ltd | Hospitality | 2019 |
| Car Clean Ltd | Administrative & support | 2026 |
| Car Finance Claim Solved Ltd | Financial services | 2024 |
| Cardtrek Property Management Limited | Households | 1983 |
| Care & Construct Ltd | Construction | 2025 |
| Care & Support South West Ltd | Health & social care | 2014 |
| Care Plus Devon Ltd | Health & social care | 2019 |
| Careervets.Com Ltd | Administrative & support | 2011 |
| Carelect Limited | Construction | 2018 |
| Carers AID Torbay C.I.C. | Administrative & support | 2016 |
| Caresect Construction Limited | Construction | 2017 |
| Caretakers (SW) Limited | Health & social care | 2003 |
| Carex Healthcare Services Ltd | Administrative & support | 2022 |
| Carex Staffing Ltd | Administrative & support | 2021 |
| Carlton Manor Freehold Management Ltd | Households | 2017 |
| Carlyon Bay Hotel Limited | Extraterritorial | 1957 |
| Carol's Court Residents Association Limited | Other services | 1989 |
| Carol's Property Solutions Ltd | Real estate | 2016 |
| Carpenter Court Limited | Households | 2020 |
| CARPOL1 Limited | Transport & logistics | 2015 |
| Carrick Johnson Management Services Limited | Real estate | 2003 |
| Carried Life Co Limited | Professional & scientific | 2026 |
| Carters Corners Limited | Wholesale & retail | 2010 |
| Carters Family Holdings Limited | Financial services | 2025 |
| Carters Investments Limited | Real estate | 2025 |
| Cary Grange Management Company Ltd | Households | 2001 |
| Cary Lodge Home Limited | Health & social care | 2019 |
| Cary Park Management Company Limited | Households | 2006 |
| Casa Marina Apartments Freehold Limited | Households | 2019 |
| Casa Property Investment Ltd | Real estate | 2017 |
| Cascade Drinks Limited | Extraterritorial | 2019 |
| Cascade Hair Salon Limited | Other services | 2012 |
| Cassard House Management Company Limited | Households | 1987 |
| Cassiopeia Skincare Ltd | Other services | 2025 |
| Castle Chambers Limited | Households | 2017 |
| Castle House Care (Holdings) Limited | Financial services | 2011 |
| Castle House Nursing Home Limited | Health & social care | 2003 |
| Castlepark Health Limited | Real estate | 2023 |
| Castleport Limited | Real estate | 1983 |
| Castleton TOR Management Company (Torquay) Limited | Households | 1990 |
| Cata Global Business Solutions Ltd | Administrative & support | 2023 |
| Catalyst Coaching (South West) Limited | Health & social care | 2025 |
| Catalyst Real Estate Limited | Real estate | 2025 |
| Catch of the Bay Ltd | Hospitality | 2025 |
| Catch Sport Limited | Professional & scientific | 2005 |
| Catherine Pitman Limited | Health & social care | 2004 |
| Catholic Independent Schools' Conference | Education | 1997 |
| Cattail Ventures Limited | Hospitality | 2013 |
| CB Tiling (SW) Ltd | Construction | 2017 |
| CC Accountants Ltd | Professional & scientific | 2003 |
| CCG Contractors Ltd | Construction | 2014 |
| CCG Developments Limited | Construction | 2017 |
| CDC Improvements Ltd | Construction | 2020 |
| CDM Imports Ltd | Wholesale & retail | 2024 |
| CEC Property Sourcer Ltd | Real estate | 2019 |
| Cedars, (Denmark Road, Exeter) Management Co., Limited(The) | Households | 1986 |
| Celia Clothing Limited | Wholesale & retail | 2025 |
| Cell & Repair Limited | Other services | 2018 |
| Celmat Limited | Extraterritorial | 2013 |
| Celtic Group Developments Ltd | Construction | 2020 |
| Celtic Lines Ltd | Professional & scientific | 2004 |
| Celtic Racing Ltd | Construction | 2006 |
| Celtic Racing VIP Paintwork Ltd | Wholesale & retail | 2013 |
| Cenise Planning Ltd | Professional & scientific | 2026 |
| Central Caffe Ltd | Other services | 2018 |
| Century 7 Limited | Real estate | 2003 |
| Cerberus Energy Limited | Energy | 2006 |
| Chace Construction Ltd | Construction | 2017 |
| Chalk Kitchens Ltd | Manufacturing | 2015 |
| Challenger Charters Ltd | Administrative & support | 2020 |
| Champion Engineering Limited | Professional & scientific | 2012 |
| Champion WIN Competitions Ltd | Information & communication | 2025 |
| Champs Elysees Motorsports Limited | Administrative & support | 2019 |
| Channel View Ltd | Real estate | 2023 |
| Chariot Limited | Information & communication | 1999 |
| Charlie Pizza Ltd | Hospitality | 2023 |
| Charlotte Court Management (Torquay) Limited | Households | 1993 |
| Charlotte Sexton Associates Ltd | Information & communication | 2022 |
| Charlton Court (Teignmouth) Management Company Limited | Households | 2006 |
| Charmleaves Limited | Households | 1995 |
| Charter Brands Limited | Wholesale & retail | 2011 |
| Chartfield Associates Ltd | Professional & scientific | 2015 |
| Chas and Dave's Limited | Real estate | 2016 |
| Chatsworth House (Torquay) Management Company Limited | Households | 2008 |
| Chatterstars Limited | Education | 2018 |
| Cheeto Mini Ltd | Wholesale & retail | 2026 |
| Cheeto Minimarket Ltd | Wholesale & retail | 2024 |
| Chefs ETC Recruitment Ltd | Administrative & support | 2019 |
| Chelston Chiropody Limited | Health & social care | 2005 |
| Chelston Contractors Limited | Construction | 2026 |
| Chelston Electrical Services Holdings Limited | Manufacturing | 2023 |
| Chelston Motor Services Limited | Wholesale & retail | 1992 |
| Chelston View (Flat Management) Limited | Households | 1988 |
| Chelstow Limited | Real estate | 1997 |
| Cherinford Limited | Information & communication | 2024 |