| Bwinstall Limited | Construction | 2021 |
| C Scerri Architects Ltd | Professional & scientific | 2019 |
| C. & M. B. Limited | Real estate | 2002 |
| Cahill Steel Fabrications Ltd | Manufacturing | 2014 |
| Calldigit Limited | Information & communication | 1993 |
| Calmcore Strings Ltd | Wholesale & retail | 2026 |
| Captive Associates Ltd | Administrative & support | 2010 |
| Carbon Lens Limited | Professional & scientific | 2016 |
| Carbonaero Ltd | Manufacturing | 2015 |
| Care for YOU Cleaning Services Ltd | Administrative & support | 2023 |
| Career, Life and Confidence Coaching Ltd | Administrative & support | 2023 |
| Carenest Housing Ltd | Real estate | 2025 |
| Casely Farms Limited | Agriculture & fishing | 1997 |
| Casterbridge Place RTM Company Limited | Households | 2024 |
| Castle Cary LVA LLP | | 2021 |
| Castle QS Holdings Limited | Wholesale & retail | 2025 |
| Catalyst Business Coaching Ltd | Professional & scientific | 2026 |
| Catherine Mitchell Design Limited | Professional & scientific | 2014 |
| Caxton LVA LLP | | 2015 |
| Cb-Salt Limited | Health & social care | 2023 |
| Celeritas Productions Ltd | Information & communication | 2026 |
| Celma Limited | Construction | 2026 |
| Chad 38 Limited | Households | 2005 |
| Channel X Limited | Arts & recreation | 1994 |
| Channel X North Ltd. | Arts & recreation | 2005 |
| Chantry Mews (Motcombe) Ltd | Households | 2023 |
| Charcuterie for Chefs Ltd | Manufacturing | 2023 |
| Charles Mullineux Design Ltd | Professional & scientific | 2019 |
| Charltons Accountancy Limited | Professional & scientific | 2002 |
| Charminster LVA LLP | | 2015 |
| Chateau Caravans Limited | Wholesale & retail | 1992 |
| Cheap Street Ltd | Real estate | 2019 |
| Checkrisk LLP | | 2008 |
| Chess Worsley Communications Limited | Professional & scientific | 2026 |
| Chilman Building Limited | Construction | 2023 |
| Chocoloulou Ltd | Wholesale & retail | 2021 |
| CHP Engineering Projects Limited | Professional & scientific | 2009 |
| Chudleigh LVA LLP | | 2017 |
| Church House Investments Limited | Financial services | 1997 |
| Church Place Management Company Limited | Households | 2001 |
| Church Road Yard Management Limited | Households | 2007 |
| Churchfields House Management Ltd | Households | 2023 |
| Cicorel (London) Limited | Manufacturing | 1967 |
| Cinegrip Limited | Information & communication | 2015 |
| City Consultants (Sherborne) Ltd | Real estate | 2016 |
| CJ Theobald Construction Limited | Construction | 2017 |
| Cjaquatic Ltd | Wholesale & retail | 2024 |
| CJW Fire Protection Ltd | Professional & scientific | 2024 |
| Claire Clark Consultancy Ltd | Real estate | 2024 |
| Clare House Management Company Limited | Households | 2012 |
| Clarke Elliot Norman Associates Limited | Manufacturing | 1988 |
| Clearstream Health Limited | Health & social care | 2025 |
| Clifftop Shop Limited | Wholesale & retail | 2026 |
| Cloudware Systems Limited | Information & communication | 2017 |
| Cloudy Cottage Ltd | Wholesale & retail | 2022 |
| Clyst Honiton 2 LVA LLP | | 2025 |
| Clyst Honiton Holdings LVA LLP | | 2021 |
| Clyst Honiton LVA LLP | | 2017 |
| Coastworx Ltd | Professional & scientific | 2024 |
| Coatbridge LVA LLP | | 2017 |
| Cobra Landscapes Ltd | Administrative & support | 2023 |
| Coco Connolly Ltd | Professional & scientific | 2024 |
| Coconut Lime Ltd | Administrative & support | 2018 |
| Cole Henley Property Ltd | Construction | 2023 |
| Coles Family Butchers Ltd | Wholesale & retail | 2022 |
| Combathippy Ltd | Manufacturing | 2025 |
| Commercial Lead Generation (UK) Ltd | Administrative & support | 2014 |
| Commisceo Global Consulting Ltd. | Administrative & support | 2011 |
| Common View Marketing Limited | Professional & scientific | 2008 |
| Compton Land Management Ltd | Financial services | 2026 |
| Compton Oaks Properties Limited | Households | 1994 |
| Computain Ltd | Information & communication | 2025 |
| Conduit Construction Group Limited | Construction | 2026 |
| Conrad Josephine Limited | Financial services | 2024 |
| Conrad Koslowsky Architects Ltd | Professional & scientific | 2020 |
| Contract Sustainability Ltd | Professional & scientific | 2026 |
| Cornish Farmhouse Frozen Foods Limited | Wholesale & retail | 1974 |
| Corrie Road (Addlestone) Management Company Limited | Households | 1988 |
| Corsham LVA LLP | | 2014 |
| Corton Denham Investments Ltd | Real estate | 2024 |
| Corton Ridge Estates Ltd | Real estate | 2026 |
| Corton Ridge Limited | Real estate | 2017 |
| Corton Ridge Property Management Ltd | Hospitality | 2022 |
| Cosentino Consulting Limited | Administrative & support | 2024 |
| Cosy Calf Limited | Wholesale & retail | 2013 |
| Cotesbury Holdings Limited | Financial services | 2023 |
| Cotesbury Limited | Professional & scientific | 2018 |
| Coultard Limited | Information & communication | 2000 |
| Country City Catering Limited | Hospitality | 2018 |
| Country Home Services Ltd | Wholesale & retail | 2020 |
| County Town Aggregates Limited | Wholesale & retail | 2013 |
| Court House Farm and Property Ltd | Agriculture & fishing | 2025 |
| Cowley House Consulting Limited | Professional & scientific | 2023 |
| Cracked EGG Limited | Extraterritorial | 2009 |
| Cranbrook LVA LLP | | 2013 |
| Crest House Management Company Limited | Households | 2000 |
| Crossroads Pet Supplies Limited | Wholesale & retail | 2006 |
| Crowborough LVA LLP | | 2017 |
| CS Eames Properties Ltd | Real estate | 2026 |
| Cs-I Sherborne Limited | Manufacturing | 1987 |