| Caliunity CIC | Manufacturing | 2021 |
| Call ME Jill Ltd | Administrative & support | 2021 |
| Callaghan & Scott Limited | Manufacturing | 2008 |
| Callaina Limited | Transport & logistics | 2017 |
| Callaway Homes Limited | Real estate | 2020 |
| Callidus Transport & Engineering Ltd | Professional & scientific | 2008 |
| Calliope Investments Limited | Real estate | 2012 |
| Callum Eaton Ltd | Arts & recreation | 2023 |
| Calm Engineering Ltd | Professional & scientific | 2014 |
| Calmer Rooms LLP | | 2021 |
| Calmfocusperform LLP | | 2025 |
| Calver Holdings Limited | Financial services | 2020 |
| CAM Tyre and Welding Company Limited | Manufacturing | 1974 |
| Cambridge Ultrasound Scan Limited | Health & social care | 2021 |
| Camden (Bath) Management Company Limited | Households | 1983 |
| Camden Mews Construction Co. Ltd | Construction | 2018 |
| Camella Estate Agents Ltd | Real estate | 2023 |
| Camella Holdings Ltd | Financial services | 2025 |
| Camella Lettings Ltd | Real estate | 2025 |
| Cameron Barnett Limited | Professional & scientific | 2016 |
| Camerton Auto Repairs Limited | Manufacturing | 2005 |
| Camper Fans Limited | Administrative & support | 2016 |
| Campion (UK) Limited | Other services | 2013 |
| Campus Project Solutions Ltd | Real estate | 2010 |
| Canalside Electrical Contractors Ltd | Construction | 2026 |
| Canalside Landscaping and Green Space Management Ltd | Construction | 2026 |
| Canary GIN & Wine Bar Limited | Hospitality | 2012 |
| Cando Cleaners Ltd. | Administrative & support | 2017 |
| Canine Craze Ltd | Other services | 2019 |
| Canned Wine Company Ltd | Wholesale & retail | 2019 |
| Canopus Publishing Limited | Information & communication | 1999 |
| Cantilever Gardens Limited | Real estate | 2025 |
| Cantilever Gardens One Limited | Real estate | 2025 |
| Caparica Ltd | Professional & scientific | 2003 |
| Capital Lead Solutions Ltd | Information & communication | 2022 |
| Caplon Limited | Construction | 1990 |
| Cappadocia Restaurant (Bath) Ltd | Hospitality | 2019 |
| Capstan Projects Limited | Professional & scientific | 2023 |
| Captain Sweep Ltd | Administrative & support | 2023 |
| Captivent Limited | Administrative & support | 2006 |
| Capture Certification Ltd | Other services | 2009 |
| Capture Group Ltd | Information & communication | 1995 |
| Capture International Ltd | Information & communication | 2008 |
| Capture Property Marketing Ltd. | Professional & scientific | 2010 |
| Car Rentals Bath Ltd | Administrative & support | 2024 |
| Caratti Ltd | Wholesale & retail | 2013 |
| Carazo Ltd | Wholesale & retail | 2026 |
| Carbis Bay Homes Ltd | Real estate | 2017 |
| Carbon Consult Limited | Professional & scientific | 2015 |
| Carbon Kind Ltd | Professional & scientific | 2022 |
| Cardale Care Limited | Health & social care | 2009 |
| Cardiac Medical Limited | Professional & scientific | 2016 |
| Cardiac Technical Services Limited | Health & social care | 2018 |
| Cardiff Scans Limited | Health & social care | 2018 |
| Care Momentum Ltd | Professional & scientific | 2025 |
| Carepoint Healthcare Solutions Ltd | Health & social care | 2025 |
| Carera Retreats Ltd | Hospitality | 2024 |
| Carespace Technology Ltd | Information & communication | 2024 |
| Carina B Couture Ltd | Wholesale & retail | 2020 |
| Carina Baverstock Couture Limited | Wholesale & retail | 2010 |
| Carlaw Trading Ltd | Wholesale & retail | 2019 |
| Carley Bishop Production Ltd | Professional & scientific | 2021 |
| Carlink Rental Ltd | Administrative & support | 2025 |
| Carlsgrove Limited | Information & communication | 2015 |
| Carma Fleet Management Ltd | Administrative & support | 2024 |
| Carnelian Health Ltd | Administrative & support | 2022 |
| Caroline Dale Limited | Arts & recreation | 2011 |
| Caroline Gourlay Consulting Limited | Professional & scientific | 2015 |
| Caroline Sampson & Co Ltd | Professional & scientific | 2018 |
| Carpentry by Design (SW) Ltd | Construction | 2025 |
| Carter Cargo Ltd | Transport & logistics | 2025 |
| Carter Hughes (Consulting) Limited | Professional & scientific | 2001 |
| Carter Kemp Limited | Construction | 2003 |
| Carterfun Ltd | Arts & recreation | 2024 |
| Cartoonstock Limited | Information & communication | 1998 |
| Cartronic Tech 4U Ltd | Wholesale & retail | 2025 |
| Caruba Limited | Professional & scientific | 2021 |
| Carve Offshore Projects Ltd | Professional & scientific | 2025 |
| Carwash Palace Farm Ltd | Other services | 2022 |
| Casa Architects Limited | Professional & scientific | 2006 |
| Casa DE Tapas Limited | Hospitality | 2020 |
| Casa Trustees Ltd | Professional & scientific | 2024 |
| Cash Giveaway Ltd | Wholesale & retail | 2025 |
| Castior Limited | Financial services | 2010 |
| Castle Bath Ltd | Hospitality | 2025 |
| Castle Farm Management Company Limited | Administrative & support | 2005 |
| Castle Farm Organics Limited | Agriculture & fishing | 2013 |
| Castle Management (Taunton) Limited | Professional & scientific | 2010 |
| Castlemead Poultry Limited | Agriculture & fishing | 2020 |
| Castlemed Ltd | Health & social care | 2013 |
| Castlemoon Europe Limited | Financial services | 2015 |
| Cat Lore Media Ltd. | Information & communication | 2013 |
| Catalytic Ltd | Professional & scientific | 2024 |
| Catching Excellence Ltd | Professional & scientific | 2018 |
| Catharine Place (Bath) Management Company Limited | Households | 1991 |
| Catherine Bell Legal Services Limited | Professional & scientific | 2025 |
| Catherine Miller Silk Specialist Limited | Administrative & support | 2002 |
| Cats Whiskers of Bath Ltd | Wholesale & retail | 2020 |
| Causal MAP Ltd | Information & communication | 2020 |
| Cavalier Mortgages Limited | Financial services | 2021 |