| Cfront Software Ltd | Information & communication | 2010 |
| CG Evolution Auto Ltd | Wholesale & retail | 2025 |
| CG Land Holdings Limited | Financial services | 2022 |
| CG Trade Glazing Limited | Construction | 2024 |
| CGC Building Contractors Ltd | Construction | 2018 |
| CGN Direct Ltd | Wholesale & retail | 2025 |
| CGR Holdings Ltd | Administrative & support | 2022 |
| CH Club Ltd | Other services | 2020 |
| CHA LIU UK Ltd | Wholesale & retail | 2024 |
| Chabad Lubavitch South East Counties Ltd | Other services | 2011 |
| Chacoo Limited | Hospitality | 2026 |
| Chaddwood Limited | Wholesale & retail | 2024 |
| Chae’S Cakes Ltd | Hospitality | 2025 |
| Chai Guys Ltd | Hospitality | 2018 |
| Chain Pier House (Brighton) Limited | Households | 1995 |
| Chalk by VAL Cussell Ltd | Other services | 2023 |
| Chalk Ridge Projects Ltd | Real estate | 2021 |
| Chalkstone Films Limited | Information & communication | 2025 |
| Chalky Fields Residents Management Company Limited | Households | 2024 |
| Challenge Cyber Limited | Information & communication | 2022 |
| Challenger Property Developments LLP | | 2011 |
| Challenging Assumptions Ltd | Administrative & support | 2018 |
| Chalmers & Co (Sussex) Limited | Construction | 2002 |
| Chalred Ltd | Information & communication | 2025 |
| Chamberlain Carpentry & Joinery Limited | Construction | 1993 |
| Chambers & Co Accountants LLP | | 2012 |
| Chambers Media Ltd | Information & communication | 2014 |
| Chambury Consulting Ltd | Information & communication | 2012 |
| Chameleon Business Media Limited | Information & communication | 2005 |
| Chameleon Refurbishments Limited | Construction | 1995 |
| Champion News Service Limited | Information & communication | 2004 |
| Chamuyo Limited | Hospitality | 2018 |
| Chandler Estates Limited | Construction | 2022 |
| Chandler Property Development Services Limited | Real estate | 2016 |
| Change Space Consulting Limited | Professional & scientific | 2005 |
| Change, Grow, Live | Health & social care | 1999 |
| Change, Grow, Live Services Limited | Health & social care | 2007 |
| Change.Delivered Limited | Professional & scientific | 2019 |
| Changeideal Residents Management Limited | Households | 1988 |
| Changeology Global Limited | Professional & scientific | 2018 |
| Channa Housing Ltd | Real estate | 2026 |
| Channel Glazing Limited | Professional & scientific | 1998 |
| Channels and Choices Holdings Limited | Other services | 2018 |
| Channels and Choices Kent LLP | | 2008 |
| Channels and Choices Limited | Health & social care | 2008 |
| Chantry Properties Holdings Limited | Real estate | 2015 |
| Chantry Properties Limited | Real estate | 2003 |
| Chantry Sand Quarry Holdings Limited | Mining & quarrying | 2015 |
| Chantry Sand Quarry Limited | Mining & quarrying | 2015 |
| Chaos Theory Studios Ltd | Manufacturing | 2018 |
| Chaotic Creators Magazine Ltd | Wholesale & retail | 2025 |
| Chaotic Order Ltd | Information & communication | 2022 |
| Chapel Heights Limited | Real estate | 2002 |
| Chapel Motor Homes Limited | Wholesale & retail | 2009 |
| Chapel Stone Consulting Limited | Information & communication | 2017 |
| Chapman Blockbuster Limited | Information & communication | 2019 |
| Chapple Property Services Sussex Limited | Real estate | 2019 |
| Chapter 33 Limited | Real estate | 2022 |
| Char & Coal Ltd | Wholesale & retail | 2025 |
| Charanga Limited | Information & communication | 1983 |
| CHARBEL2 Ltd | Hospitality | 2025 |
| Chargenet Limited | Administrative & support | 2000 |
| Chariklo Group Limited | Real estate | 2016 |
| Charisma Entertainment Limited | Information & communication | 2015 |
| Charles Coker Ltd | Health & social care | 2016 |
| Charles Edward Construction Limited | Construction | 2023 |
| Charles Piton (London & Kent) Limited | Administrative & support | 2020 |
| Charles Russell Property Ltd | Real estate | 2025 |
| Charles Thorpe Associates Ltd | Administrative & support | 2023 |
| Charlie BEE Consulting Services Ltd | Administrative & support | 2024 |
| Charlie Done IT Ltd | Professional & scientific | 2020 |
| Charlie Matthews Consulting Ltd | Professional & scientific | 2026 |
| Charlie Penny Ltd | Hospitality | 2019 |
| Charlie Willis Ltd | Professional & scientific | 2020 |
| Charlie's Dog Grooming Brighton Ltd | Other services | 2026 |
| Charlies Market Ltd | Wholesale & retail | 2021 |
| Charlotte Delmonte Design Limited | Other services | 2010 |
| Charlotte Freeland Aesthetics Limited | Other services | 2017 |
| Charlotte Mews (Management) Company Limited | Households | 2001 |
| Charlotte Raphael Design Limited | Professional & scientific | 2026 |
| Charlotte Spencer Projects Community Interest Company | Arts & recreation | 2017 |
| Charney Consulting Ltd | Professional & scientific | 2012 |
| Charnock Ltd | Construction | 2015 |
| Charro Ltd | Real estate | 2019 |
| Charter House (Flat Owners) Limited | Households | 2003 |
| Charter House Flats Management Company (Drury Lane) Limited | Households | 1992 |
| Charz Limited | Health & social care | 2015 |
| Chase Business School Ltd | Education | 2025 |
| Chase Construction Consultancy Ltd | Construction | 2019 |
| Chase Embalming Services Ltd | Administrative & support | 2008 |
| Chasefield Associates Ltd | Professional & scientific | 2019 |
| Chaseside Limited | Health & social care | 2015 |
| Chater Smart Limited | Professional & scientific | 2022 |
| Chatham Place Management Company Limited | Households | 2000 |
| Chatterbox Group Limited | Professional & scientific | 2021 |
| Chatterbox Media Limited | Information & communication | 2017 |
| Chatterbox Productions Ltd | Professional & scientific | 2013 |
| Chatterbox Property Limited | Real estate | 2021 |
| Check a Flow Ltd | Wholesale & retail | 2023 |
| Checketts Brew Co Ltd | Manufacturing | 2025 |