| Chrono Trader Ltd | Information & communication | 2025 |
| Chrysalis Cafe Limited | Hospitality | 2025 |
| Chryssafi Catering Ltd | Hospitality | 2015 |
| CHSPV1 Limited | Real estate | 2022 |
| Chulha & Charm Ltd | Hospitality | 2026 |
| Chungs UK Limited | Wholesale & retail | 2001 |
| Chunkston Limited | Real estate | 2017 |
| Church & Gooderham Limited | Manufacturing | 2005 |
| Church Barn Design & Build Limited | | 2011 |
| Church Boxing Limited | Education | 2024 |
| Church Farm (Felthorpe) Limited | Agriculture & fishing | 1999 |
| Church Farm (Saxthorpe) Limited | Agriculture & fishing | 1965 |
| Church Farm (Sparham) Limited | Agriculture & fishing | 1958 |
| Church Farm Cottages Limited | Hospitality | 1999 |
| Church Farm Garage Ltd | Wholesale & retail | 2007 |
| Church Farm Land Ltd | Real estate | 2018 |
| Church Farm Norfolk Ltd | Health & social care | 2023 |
| Church Farm Shop Limited | Wholesale & retail | 2020 |
| Church Farms (Gimingham) Limited | Agriculture & fishing | 1959 |
| Church Hill Ventures Limited | Wholesale & retail | 2016 |
| Church View Court Residents Association Limited | Professional & scientific | 1980 |
| Churchill Facilities Management Limited | Administrative & support | 2013 |
| Churchill Insurance Company Limited | Financial services | 1988 |
| Churchills of Dereham Limited | Wholesale & retail | 2005 |
| Churchmouse Cheeses Limited | Administrative & support | 2002 |
| Churchnet Limited | Information & communication | 2013 |
| Churchview Building Contractors Limited | Construction | 1999 |
| Churros for the People Ltd | Hospitality | 2025 |
| Chyros Developments Ltd | Construction | 2020 |
| CIA Technology Global Ltd | Manufacturing | 2003 |
| Cigs & Papers Limited | Real estate | 2002 |
| Cilerna Property Acquisitions LLP | | 2018 |
| Cindy Impey School Improvement Ltd | Education | 2022 |
| Cinemavision Ltd | Information & communication | 2025 |
| Cinnamon Court Limited | Hospitality | 2016 |
| Cipity Holdings Limited | Professional & scientific | 2024 |
| Circinus Organisation Ltd | Wholesale & retail | 2025 |
| Circlet Homes Limited | Households | 2012 |
| Circuit Build Limited | Construction | 2000 |
| Circuit Timing Ltd | Information & communication | 2025 |
| Circumference Holdings Ltd | Wholesale & retail | 2019 |
| Circus Head CIC | Hospitality | 2022 |
| Cirello Ltd | Real estate | 2019 |
| Cirrus Anaesthesia Ltd | Health & social care | 2019 |
| CIS Continuous Improvement Solutions Ltd. | Professional & scientific | 2010 |
| Cisco Group Limited | Transport & logistics | 2020 |
| Ciscoes Catering Ltd | Hospitality | 2013 |
| Cista Limited | Financial services | 2021 |
| Cit-Ren Limited | Wholesale & retail | 1999 |
| Citchen Limited | Professional & scientific | 2023 |
| Citi Keys Ltd | Real estate | 2026 |
| Citi TEL Limited | Information & communication | 2013 |
| Citibuild Developments Limited | Administrative & support | 2008 |
| Citrus Fruit Ltd | Wholesale & retail | 2023 |
| Citrus Tree Services Limited | Financial services | 2023 |
| Citta Labs Limited | Information & communication | 2026 |
| City & County Residential Lettings Ltd | Real estate | 2010 |
| City 2 City Cleaning Limited | Administrative & support | 2017 |
| City Beauty Supplies (UK) Ltd | Wholesale & retail | 2013 |
| City Brides Limited | Wholesale & retail | 2009 |
| City Cabs (Norwich) Limited | Transport & logistics | 2017 |
| City Cars Limited | Transport & logistics | 1995 |
| City Convenience ( Norwich ) Limited | Wholesale & retail | 2011 |
| City Greens Golf Ltd | Arts & recreation | 2025 |
| City Groundworkers Ltd | Construction | 2024 |
| City Leisure Lease Holdings Ltd | Hospitality | 2016 |
| City Light Health Care PVT Limited | Administrative & support | 2025 |
| City of Norwich Aviation Museum | Arts & recreation | 1983 |
| City of Norwich Swimming Club | Arts & recreation | 2004 |
| City SAW & Knife Services Limited | Manufacturing | 2003 |
| City Scaffolding Norwich Limited | Construction | 2020 |
| City Signs Limited | Manufacturing | 2004 |
| City Spice Restaurant Ltd | Hospitality | 2020 |
| City Stove Installs Limited | Construction | 2024 |
| City Tyres Specialists Norwich Ltd | Wholesale & retail | 2019 |
| Citygate Developments 2005 Limited | Real estate | 2004 |
| Citygate Developments 2011 Limited | Real estate | 2011 |
| Citygate Developments East Anglia LLP | | 2009 |
| Citygate Developments Investment Limited | Extraterritorial | 2008 |
| Citygate Developments Limited | Real estate | 2000 |
| Cityglades Residents Management Company Limited | Households | 2020 |
| Cityside Living Ltd | Real estate | 2025 |
| Citysquared Limited | Manufacturing | 2004 |
| Civicfin Ltd | Information & communication | 2025 |
| Civicrest Limited | Professional & scientific | 1990 |
| Ciyona Care Ltd | Health & social care | 2025 |
| CJ Aerials Limited | Construction | 2010 |
| CJ Canteens Limited | Hospitality | 2025 |
| CJ Collective Ltd | Other services | 2020 |
| CJ Eagleton Consultants Ltd | Professional & scientific | 2020 |
| CJ Well Services Ltd | Mining & quarrying | 2023 |
| Cj's Food Truck Ltd | Hospitality | 2024 |
| Cj's Fruit & VEG Ltd. | Wholesale & retail | 2020 |
| CJB Purchase Limited | Wholesale & retail | 2005 |
| CJC Procurement Ltd | Professional & scientific | 2016 |
| CJC Transport Consultants Limited | Transport & logistics | 2021 |
| Cjdungar Holdings Limited | Financial services | 2021 |
| CJE Installations Limited | Construction | 2025 |
| Cjgotts Ltd | Wholesale & retail | 2025 |
| CJH Management Ltd | Real estate | 2025 |