| Cheeba Cheeba Records Ltd | Information & communication | 2026 |
| Cheese: Removals & Transport Ltd | Transport & logistics | 2020 |
| Cheezly Limited | Wholesale & retail | 2019 |
| Chelikhan Ltd | Hospitality | 2021 |
| Chelsea Square Garden Limited | Households | 2003 |
| Cheltcare Ltd | Health & social care | 2014 |
| Chen Property Services Limited | Other services | 2018 |
| Cheng Shang Education Services Limited | Extraterritorial | 2020 |
| Cherell Lynes Ltd | Professional & scientific | 2019 |
| Cherry Orchard Residents Association Limited | Households | 1990 |
| Cherry PIE Day Nursery Limited | Health & social care | 2024 |
| Cherry Tree (Sussex) Ltd | Hospitality | 2025 |
| Cherry Tree Lane (Brighton) Limited | Households | 2019 |
| Cherryleaf Limited | Information & communication | 2002 |
| Cherrystone Services Ltd | Administrative & support | 2025 |
| Cheshire Private Travel Ltd | Administrative & support | 2023 |
| Chess Transport Ltd | Transport & logistics | 2023 |
| Chesterfield Antiques Ltd | Wholesale & retail | 2012 |
| Chestl. Ltd | Wholesale & retail | 2025 |
| Chestnut Development Co Limited | Real estate | 1994 |
| Chestnutwood Limited | Administrative & support | 1995 |
| Chestpal Ltd | Manufacturing | 2022 |
| Chevening Financial Ltd | Financial services | 2007 |
| CHEWBARKER20 Ltd | Wholesale & retail | 2023 |
| Chewter Properties Limited | Real estate | 2022 |
| Chez Susie Ltd | Real estate | 2006 |
| Chic Flower Designs Ltd | Professional & scientific | 2011 |
| Chichester Close Management Company Limited | Households | 1991 |
| Chichester Close Saltdean RTM Company Limited | Households | 2005 |
| Chichester Diocesan Association for Family Support Work | Health & social care | 1982 |
| Chichester Journal CIC | Information & communication | 2026 |
| Chicosventures Limited | Professional & scientific | 2024 |
| Chiddingly Cheese Company Limited | Manufacturing | 2020 |
| Chief Build Ltd | Construction | 2025 |
| Chief Plastering Ltd | Construction | 2017 |
| Childcare 360 Holdings Limited | Financial services | 2017 |
| Childcare 360 Limited | Health & social care | 2016 |
| Children's Attractions Limited | Arts & recreation | 2024 |
| Chilidog Productions Limited | Information & communication | 2007 |
| Chilli Brighton Limited | Hospitality | 2024 |
| Chilli Chutney Ltd | Financial services | 2025 |
| Chilli Mint Limited | Professional & scientific | 2003 |
| Chilli Shaak Ltd | Hospitality | 2019 |
| Chimera Creative Ltd | Real estate | 2020 |
| Chimney Design Limited | Administrative & support | 2009 |
| Chimp Brands Ltd | Wholesale & retail | 2021 |
| China Chef 28 Ltd | Hospitality | 2024 |
| China Kitchen Brighton Ltd | Hospitality | 2023 |
| China Red 2 Limited | Hospitality | 2007 |
| China Tech Recruitment Limited | Administrative & support | 2021 |
| Chinock Repairs Ltd | Manufacturing | 2018 |
| Chiron Development Ltd | Professional & scientific | 2020 |
| Chiropody & Health Limited | Health & social care | 2004 |
| Chixvale Limited | Professional & scientific | 1982 |
| Chizzlesticks Limited | Administrative & support | 2007 |
| Chloe Goodman Limited | Arts & recreation | 2014 |
| Chlorex Ltd | Wholesale & retail | 2025 |
| Choccywoccydoodah Limited | Manufacturing | 2021 |
| Chock Hoss Ltd | Information & communication | 2022 |
| Choice Building Supplies Ltd | Wholesale & retail | 2003 |
| Choisi Limited | Administrative & support | 1996 |
| Chool Ltd | Extraterritorial | 2013 |
| Choose Yourself Clothing Ltd | Wholesale & retail | 2023 |
| Choppersaurus Limited | Information & communication | 2014 |
| Chord Design Limited | Professional & scientific | 2018 |
| Chorus Property Ltd | Real estate | 2025 |
| Chowdary Williams Properties Ltd | Hospitality | 2022 |
| Chris Browne Builders Limited | Construction | 2015 |
| Chris Cousins Limited | Professional & scientific | 2011 |
| Chris Finch Web Development Ltd | Information & communication | 2017 |
| Chris Godfrey Ltd | Information & communication | 2016 |
| Chris Johnson Vocal Coach Ltd | Arts & recreation | 2017 |
| Chris Luzmoor Ltd | Professional & scientific | 2026 |
| Chris People Ltd | Professional & scientific | 2015 |
| Chris Whittle Decorating Limited | Construction | 2010 |
| Christel Creations Ltd | Professional & scientific | 2018 |
| Christian and Cowell Limited | Wholesale & retail | 2019 |
| Christian Art Limited | Other services | 1988 |
| Christies Management Solutions Limited | Administrative & support | 2005 |
| Christina Wyatt Coaching Limited | Administrative & support | 2022 |
| Christine Ellen Vowles Ltd | Professional & scientific | 2025 |
| Christopher Francis Stafford Limited | Health & social care | 2022 |
| Chronos Gate Ltd | Professional & scientific | 2025 |
| Chrow Solutions Ltd | Education | 2016 |
| Chrysalis Montessori Community Interest Company | Education | 2023 |
| Chrysalis Montessori Education Limited | Education | 2025 |
| Chs-Un Limited | Real estate | 2024 |
| Chubbs Group Limited | Hospitality | 2018 |
| Chuk Productions Limited | Information & communication | 2012 |
| Chunkvision Ltd | Wholesale & retail | 2023 |
| Church Meadows Goring-By-Sea Freehold Company Limited | Households | 2016 |
| Church Street Brighton RTM Company Limited | Extraterritorial | 2026 |
| Churchill Rose Limited | Professional & scientific | 2020 |
| Churchills Foreign Exchange Ltd | Financial services | 2023 |
| Churchyard Costume Limited | Information & communication | 2013 |
| Chuusai Limited | Information & communication | 2008 |
| CI Optometrists Limited | Wholesale & retail | 2016 |
| Ciao Bella Brighton Ltd | Other services | 2026 |
| Cias Construction Consultants Limited | Construction | 2021 |
| Cibus Pest Control Ltd | Administrative & support | 2024 |