| Cabot Resourcing Limited | Administrative & support | 2011 |
| Cabot Search Ltd | Administrative & support | 2018 |
| Cadbury Gardens Management Company Limited | Administrative & support | 2007 |
| Cafe Fusion Limited | Hospitality | 2019 |
| Calder Communication Services Limited | Professional & scientific | 2008 |
| Calder of Clevedon Roofing Ltd | Construction | 2024 |
| Car Imports Direct Ltd | Wholesale & retail | 1998 |
| Career Collaborators Limited | Other services | 2025 |
| Carice Holdings Ltd | Financial services | 2024 |
| Carl Emery Construction Limited | Construction | 2020 |
| Carly Aston Limited | Information & communication | 2014 |
| Carmet Europe Ltd | Professional & scientific | 2012 |
| Carnie Construction Ltd | Construction | 2021 |
| Carpenters Properties Limited | Real estate | 2005 |
| Carter & Green Ltd | Wholesale & retail | 2015 |
| Carter's Barbers Limited | Other services | 2021 |
| Cartford Bridge Company (the) Limited | Transport & logistics | 1929 |
| Casegrange Limited | Professional & scientific | 2023 |
| Castle Builders (WS) Limited | Construction | 2019 |
| Castlegait Consulting Limited | Professional & scientific | 2015 |
| Caswell Commercials Limited | Wholesale & retail | 2003 |
| Cattermole Tutoring and Coaching Ltd | Education | 2024 |
| Cavell House BED and Breakfast Limited | Hospitality | 2023 |
| CB Jewellery Limited | Wholesale & retail | 2015 |
| CB Smiles Ltd | Health & social care | 2026 |
| CBS (Retentions) Limited | Construction | 2009 |
| CBS Precast Holdings Ltd | Financial services | 2025 |
| Cemb Limited | Real estate | 2004 |
| Centauri Automotive Electronics Limited | Wholesale & retail | 2003 |
| Centre for Sustainable Peace and Democratic Development | Professional & scientific | 2019 |
| Centrum (Worle) Management Company Limited | Households | 2007 |
| Centurion Wealth Management Limited | Financial services | 2009 |
| Ceproperty Limited | Real estate | 2019 |
| Cetec Systems Limited | Construction | 2010 |
| CH Homes Limited | Extraterritorial | 2021 |
| Chadwick (Bridgwater) Limited | Real estate | 2016 |
| Chadwick Business Centres Ltd | Real estate | 2013 |
| Chadwick Enterprises Limited | Real estate | 2022 |
| Chadwick Holdings Limited | Real estate | 1967 |
| Chadwick Newminster House Limited | Real estate | 2014 |
| Chalian Property Ltd. | Real estate | 2018 |
| Challicoms Ltd | Households | 2024 |
| Champion Brothers Ltd | Construction | 2024 |
| Changing Lives Charity | Water & waste | 2015 |
| Chantry Park (Swindon) Management Company Limited | Households | 2004 |
| Charlotte Sapak Consultancy Limited | Real estate | 2020 |
| Charlton Hayes (H15 & H16) Management Company Limited | Administrative & support | 2016 |
| Chea Limited | Real estate | 2017 |
| Cheeky Bytes Ltd | Information & communication | 2024 |
| Chefonline UK Limited | Extraterritorial | 2014 |
| Chelpany Limited | Households | 1976 |
| Chequers Court (Stoke Gifford) NO. 2 Management Company Limited | Households | 1989 |
| Chequers Court (Stoke Gifford) NO. 5 Management Company Limited | Households | 1992 |
| Chequers Court (Stoke Gifford) NO.3 Management Company Limited | Households | 1990 |
| Cherry Orchard Court Management Company Limited | Households | 2006 |
| Cherry Tree Court (Kingston Seymour) Management Limited | Households | 2000 |
| Cheung Chaw (Somerset) Limited | Hospitality | 2015 |
| Chloes Canines Limited | Other services | 2017 |
| Chocolate Factory Residents Management Company Limited | Households | 2019 |
| Chris Brain Associates Limited | Professional & scientific | 2020 |
| Chris Ganley Racing Ltd | Arts & recreation | 2025 |
| Chris Smart Limited | Construction | 2018 |
| Christopher Brown Limited | Extraterritorial | 2019 |
| Christopher R Brown Limited | Professional & scientific | 2004 |
| Chucky and Lucifer Ltd | Hospitality | 2018 |
| Churchill Lodge Flat Management Company Limited | Households | 1979 |
| Circus Home Investments Ltd | Real estate | 2023 |
| City Kickboxing Academy CIC | Health & social care | 2025 |
| City Space RTM Company Ltd | Real estate | 2013 |
| City View Apartments RTM Company Limited | Households | 2017 |
| City View Bristol Limited | Households | 2005 |
| Claremont Developments Limited | Construction | 1965 |
| Claremont Hall (Clevedon) Management Limited | Households | 1988 |
| Claremont Ingredients Limited | Manufacturing | 1993 |
| Classic Brickwork Limited | Construction | 2003 |
| Claverham Village Enterprises Limited | Hospitality | 1999 |
| Cleantec Cleaning Services SW Ltd | Administrative & support | 2024 |
| Clevedon 1963 Limited | Extraterritorial | 2014 |
| Clevedon Arena Ltd | Arts & recreation | 2009 |
| Clevedon Auto Access Locksmiths Limited | Wholesale & retail | 2006 |
| Clevedon Balti Ltd | Hospitality | 2022 |
| Clevedon Barber Ltd | Other services | 2023 |
| Clevedon BID Limited | Administrative & support | 2018 |
| Clevedon Brewery Limited | Manufacturing | 2016 |
| Clevedon Carpentry Limited | Construction | 2015 |
| Clevedon Chiropractic Clinic Limited | Health & social care | 2017 |
| Clevedon Constitutional Club Company Limited(The) | Hospitality | 1897 |
| Clevedon Contractors Ltd. | Construction | 2017 |
| Clevedon Electrical Ltd | Construction | 2020 |
| Clevedon Flooring Limited | Construction | 2024 |
| Clevedon Glass and Maintenance Limited | Construction | 2008 |
| Clevedon Golf Club Limited | Arts & recreation | 2001 |
| Clevedon Golf Club Trading Limited | Other services | 2016 |
| Clevedon Gymnastics Centre C.I.C. | Arts & recreation | 2014 |
| Clevedon Hair Company Ltd | Other services | 2016 |
| Clevedon Hall Limited | Hospitality | 2010 |
| Clevedon Kombucha Ltd | Manufacturing | 2025 |
| Clevedon Lawn Tennis Club Limited | Arts & recreation | 2005 |
| Clevedon Motorcycles Limited | Wholesale & retail | 2017 |
| Clevedon Outdoors Ltd | Wholesale & retail | 2021 |