| Cheshunt Central Consultants Ltd | Financial services | 2014 |
| Cheshunt EYE Clinic Limited | Wholesale & retail | 2008 |
| Cheshunt Fencing Ltd | Construction | 2026 |
| Cheshunt Flooring (2013) UK Limited | Construction | 2013 |
| Cheshunt Food Center Ltd | Wholesale & retail | 2025 |
| Cheshunt Hydroponics Store Ltd | Wholesale & retail | 2013 |
| Cheshunt Market Ltd | Wholesale & retail | 2023 |
| Cheshunt Metals Ltd | Water & waste | 2012 |
| Cheshunt Tile Centre Limited | Wholesale & retail | 2009 |
| Cheshunt Trio Ltd | Hospitality | 2021 |
| Cheshunt Tyres & Car Servicing Ltd | Wholesale & retail | 2024 |
| Chessington Court Freehold Ltd | Real estate | 2011 |
| Chessington Court Garages Limited | Real estate | 2014 |
| Chessington Court NO 1 Limited | Real estate | 2012 |
| Chetty Estates Ltd | Real estate | 2019 |
| Chetty Imperial Estates Ltd | Real estate | 2026 |
| Chewydent Limited | Health & social care | 2015 |
| Chichester Property Management Limited | Real estate | 2018 |
| Chimeswood Limited | Real estate | 2022 |
| Chippy Data Ltd | Professional & scientific | 2019 |
| Chirowodza Ltd | Wholesale & retail | 2019 |
| Chisnell Management Limited | Professional & scientific | 2017 |
| Chkn Wing King FRY MIX KIT Ltd | Manufacturing | 2023 |
| Chlosglows Limited | Other services | 2023 |
| Chocolate MAN Ltd | Professional & scientific | 2025 |
| Choice Fostering Limited | Health & social care | 2017 |
| Choiss Ltd | Administrative & support | 2018 |
| CHP Ventures Ltd | Financial services | 2025 |
| Chris Blair Consulting Limited | Professional & scientific | 2009 |
| Chris DE Silva Limited | Professional & scientific | 2014 |
| Chrisp Street Developments Limited | Construction | 2014 |
| Chrisp Street Management Limited | Real estate | 2017 |
| Chrysos & Co Bookkeeping Services Ltd | Professional & scientific | 2022 |
| Churchfield Communications Limited | Professional & scientific | 2023 |
| Cibosano Limited | Wholesale & retail | 2003 |
| Cicek Investments Limited | Real estate | 2020 |
| Ciel ET SEL Limited | Manufacturing | 2026 |
| Cinek Contractors Ltd | Construction | 2014 |
| Cinta Joby Limited | Health & social care | 2016 |
| Cipbuild Ltd | Construction | 2017 |
| Circle Academy Ltd | Education | 2021 |
| Circle Facilities Management Ltd | Administrative & support | 2021 |
| Circle Security Services Ltd | Administrative & support | 2021 |
| Circle Services Ltd | Administrative & support | 2018 |
| Circle UK Group Franchise Ltd | Administrative & support | 2023 |
| Circle UK Group Ltd | Administrative & support | 2014 |
| Circular Solution Limited | Water & waste | 2025 |
| Cisada Networks Limited | Information & communication | 2016 |
| Citikane Investments Limited | Other services | 2014 |
| City Construction Consultants Ltd | Construction | 2014 |
| City Handyman Limited | Construction | 2003 |
| City North (Telford Homes) Limited | Financial services | 2011 |
| City North Finsbury Park Limited | Construction | 2012 |
| City North Finsbury Park Residential Management Company Limited | Real estate | 2013 |
| City Recruitment Associates Ltd | Administrative & support | 2017 |
| Cityswift Maintenance Ltd | Households | 2024 |
| CJ Telephony Limited | Professional & scientific | 2013 |
| CJD IT Limited | Information & communication | 2024 |
| CJO Homes Ltd | Real estate | 2023 |
| CJO Properties Ltd | Real estate | 2023 |
| CJO Roots Ltd | Real estate | 2023 |
| Cjrailinteriors Ltd | Transport & logistics | 2019 |
| CJT Investments Limited | Administrative & support | 2022 |
| Claimable Limited | Information & communication | 2009 |
| Clapton Green Ltd | Real estate | 2020 |
| Clarence Avenue (Gants Hill) Management Company Limited | Households | 2014 |
| Clarentis Ltd | Professional & scientific | 2026 |
| Clarke Environmental Solutions Limited | Construction | 2013 |
| Clarke's Electrical Installations Ltd | Construction | 2024 |
| CLC Medical Services Company Limited | Health & social care | 2019 |
| Clear View Renovations Ltd | Construction | 2021 |
| Clearflow Commissioning Ltd | Construction | 2023 |
| Cleavers Collectibles Limited | Wholesale & retail | 2024 |
| Clinical Trial Connect Limited | Health & social care | 2025 |
| Clodsli Limited | Construction | 2014 |
| Clothing Worldwide Limited | Wholesale & retail | 2018 |
| Cloudjr Ltd | Wholesale & retail | 2023 |
| Clover Autos Limited | Wholesale & retail | 2004 |
| Cloverleaf Engineering Ltd | Administrative & support | 2013 |
| Club Concierge Limited | Administrative & support | 2016 |
| Club FSG Limited | Manufacturing | 2016 |
| Clued UP Media Limited | Information & communication | 2008 |
| Clued UP Properties Ltd | Real estate | 2020 |
| Cml-Hire Ltd | Administrative & support | 2019 |
| Cmrs Holdings Limited | Professional & scientific | 2024 |
| CNC Lettings Ltd | Real estate | 2022 |
| Coach Charlotte Ltd | Education | 2023 |
| Coact Solutions Ltd | Professional & scientific | 2023 |
| Coalition Event Group Ltd | Arts & recreation | 2026 |
| Cobble Mews (Highgate) Management Limited | Households | 2007 |
| Cocc Professional Healthcare Ltd | Health & social care | 2024 |
| Cocoamore Ltd | Wholesale & retail | 2015 |
| Code 4 Limited | Construction | 2016 |
| Codepotato Limited | Information & communication | 2011 |
| Coleman Bros. Wholesale Wallpapers Limited | Wholesale & retail | 1956 |
| Colfax UK Holdings Ltd | Professional & scientific | 2011 |
| Collard Property Ltd | Real estate | 2024 |
| Collard Property Management Ltd | Real estate | 2025 |
| Collect 92 Ltd | Wholesale & retail | 2022 |
| Collstone Ltd | Administrative & support | 2014 |