| Change Begins With YOU Limited | Administrative & support | 2015 |
| Change Cleaning Services Ltd | Administrative & support | 2023 |
| Changemaker Partnership Limited | Professional & scientific | 2022 |
| Changetree Ltd | Information & communication | 2024 |
| Channel Keep Management Company Limited | Households | 1969 |
| Channer&Co Ltd | Construction | 2022 |
| Channon-Jones Developments Limited | Construction | 2002 |
| Chant Developments Ltd | Real estate | 2018 |
| Character Inns IOW Ltd | Hospitality | 2019 |
| Charbox Ltd | Hospitality | 2025 |
| Chardan Court Management Limited | Real estate | 2007 |
| Chariot Accountants Ltd | Professional & scientific | 2010 |
| Charisma Mechanical Limited | Construction | 2024 |
| Charisma Plumbing and Heating (South) Limited | Construction | 2024 |
| Charles Dartmouth Limited | Real estate | 1991 |
| Charles Ramsay Wires Limited | Arts & recreation | 2014 |
| Charliv Limited | Real estate | 2019 |
| Charlotte & Paul Limited | Real estate | 2022 |
| Charlottes Nails Chichester Limited | Other services | 2026 |
| Charman Capital Ltd | Construction | 2026 |
| Charminster (Craneswater) Limited | Hospitality | 1996 |
| Charter House Residential Lettings Limited | Real estate | 2003 |
| Chartwell Marine Ltd | Professional & scientific | 2017 |
| Chase Cars Ltd | Transport & logistics | 2014 |
| Chaserhouse Limited | Real estate | 2003 |
| Chatsworth Court Management Company (Southsea) Limited | Hospitality | 2001 |
| Chatsworth Group Ltd | Financial services | 2025 |
| Chatsworth Mortgage Group Limited | Financial services | 2025 |
| Cheeky Spuds Ltd | Hospitality | 2024 |
| Cheerhealth Holdings Limited | Professional & scientific | 2009 |
| Chemma Pharma Ltd | Wholesale & retail | 2023 |
| Cher Services Ltd | Health & social care | 2024 |
| Cherished Pet Cremations Ltd | Other services | 2019 |
| Cherque Farm (Management) Limited | Other services | 2006 |
| Cherries Property Limited | Real estate | 2026 |
| Cherryflex Property Management Limited | Households | 1994 |
| Cherubz Daycare Ltd | Health & social care | 2018 |
| Chester-Davis Ltd | Health & social care | 2016 |
| Chesterfield House Company Limited | Hospitality | 2006 |
| Chic Hair Ltd | Other services | 2022 |
| CHICARE01 Ltd Limited | Health & social care | 2024 |
| Chichester Alliance of Medical Practices Limited | Health & social care | 2024 |
| Chichester Builders Group Ltd | Construction | 2023 |
| Chichester Builders Southern Limited | Construction | 2022 |
| Chichester Landscapes Ltd | Administrative & support | 2020 |
| Chichester Metal Recycling Ltd | Wholesale & retail | 2026 |
| Chichester Roofing Limited | Construction | 2024 |
| Chicken Maniacs Ltd | Hospitality | 2023 |
| Chickendo's Peri Peri Ltd | Hospitality | 2013 |
| Chicko's Peri Peri Ltd | Extraterritorial | 2013 |
| Chiddhurst Holdings Ltd | Financial services | 2026 |
| Chidham Court RTM Company Limited | Other services | 2016 |
| Chidham Drive RTM Company Limited | Households | 2012 |
| Chief Architectural Ltd | Professional & scientific | 2023 |
| Chiefy Consulting Ltd | Information & communication | 2023 |
| Chilham Properties Limited | Construction | 2025 |
| Chilli Mash Company Ltd | Manufacturing | 2016 |
| Chiltern Dairy Limited | Wholesale & retail | 2013 |
| Chilworth Projects Ltd | Construction | 2024 |
| China Bazaar Ltd | Wholesale & retail | 2026 |
| China PO3 Ltd | Hospitality | 2025 |
| Chindit Defence Technologies LLP | | 2019 |
| Chinese Island Ltd | Hospitality | 2019 |
| Chinese Tea Portsmouth Ltd | Hospitality | 2017 |
| Chinneck Shaw Limited | Real estate | 2003 |
| Chip Lead Consulting Ltd | Administrative & support | 2025 |
| Chipper Lane Limited | Real estate | 2021 |
| Chit Chats Catering Limited | Hospitality | 2016 |
| Choc 'N' Ice Limited | Hospitality | 2018 |
| Chocolate Apothecary Café Limited | Hospitality | 2025 |
| Chocolate Apothecary Limited | Hospitality | 2009 |
| Chocolourosey Limited | Wholesale & retail | 2026 |
| Choices Store 2 Ltd | Wholesale & retail | 2025 |
| Chresta Castles Ltd | Real estate | 2020 |
| Chris Cassidy Properties Ltd | Real estate | 2023 |
| Chris New Properties Ltd | Real estate | 2020 |
| Chrissie's Garden Limited | Wholesale & retail | 2009 |
| Christie Letting Agents Limited | Real estate | 2005 |
| CHS Group Holdings Ltd | Administrative & support | 2023 |
| CHS Homes Limited | Construction | 2020 |
| Church Grants Ltd. | Information & communication | 2019 |
| Church Mews (Eastney) Management Limited | Households | 2002 |
| Church of England Soldiers, Sailors & Airmens Clubs | Hospitality | 1891 |
| Church Road Dental Care Limited | Health & social care | 2012 |
| Churchill Contractors Group UK Limited | Financial services | 2021 |
| Churchill Crescent Limited | Real estate | 2020 |
| Churchill Marketing Ltd | Professional & scientific | 2018 |
| Churchill Plant UK Limited | Construction | 2021 |
| Churchill Properties South UK Limited | Real estate | 2021 |
| Churchill Utilities UK Limited | Construction | 2021 |
| Churchillian PUB Ltd | Hospitality | 2025 |
| Churrolicious Churros UK Ltd | Hospitality | 2025 |
| Churros Factory Ltd | Hospitality | 2026 |
| Chyke Infotech Limited | Information & communication | 2022 |
| Cifadam Homes Limited | Real estate | 2024 |
| Cinar Barber Ltd | Other services | 2020 |
| Cinetex Ltd | Manufacturing | 2020 |
| Cinnabar Services Limited | Professional & scientific | 2018 |
| Cinnamon Vintage Limited | Wholesale & retail | 2000 |
| Cira Holdings Ltd | Financial services | 2024 |