| Catering Repair Services Ltd | Manufacturing | 2018 |
| Caterlec Services Limited | Manufacturing | 1994 |
| Caterlink Supplies Limited | Hospitality | 2014 |
| Cateryne Court Residents Limited | Households | 1987 |
| Catfield Spuds Limited | Agriculture & fishing | 2012 |
| Cathedral Cabs Ltd | Transport & logistics | 2012 |
| Cathedral Cleaning Services Anglia Limited | Administrative & support | 2019 |
| Cathedral Coffee House Ltd | Hospitality | 2025 |
| Cathedral Psychiatry and Wellbeing Ltd | Health & social care | 2026 |
| Cathedral Surety Limited | Financial services | 2025 |
| Cathedral Window Cleaning Anglia Limited | Administrative & support | 2019 |
| Catherine Salway Ltd | Professional & scientific | 2012 |
| Cathys Caterpillars Ltd | Health & social care | 2026 |
| Catlin Digital Ltd | Information & communication | 2022 |
| Catorlakes Ltd | Financial services | 2025 |
| Catton Construction Limited | Wholesale & retail | 1971 |
| Catton GAS Plumbing and Heating Ltd | Construction | 2021 |
| Catton Hall Farm Residents Association Limited | Households | 1989 |
| Catton Home Improvements Ltd | Manufacturing | 2012 |
| Catton Neatishead Residents Company Limited | Households | 2002 |
| Catton Park Trust Ltd | Arts & recreation | 2004 |
| Catton Paving Landscaping Materials Norfolk Ltd | Wholesale & retail | 2021 |
| Catton Paving Landscaping Norfolk Ltd | Construction | 2012 |
| Catton Print Limited | Manufacturing | 2002 |
| Catweazle Limited | Professional & scientific | 2016 |
| Caudrey Limited | Wholesale & retail | 1958 |
| Cava Diagnostics Limited | Professional & scientific | 2020 |
| Cavalier Mailing (UK) Limited | Transport & logistics | 2010 |
| Cavalier Mailing Services Limited | Administrative & support | 1997 |
| Cavalry Tattoo Studio Ltd | Arts & recreation | 2018 |
| Cavan | Financial services | 2025 |
| Cavan Court Limited | Construction | 2019 |
| Cave Direct Technology Ltd | Wholesale & retail | 2023 |
| Cave Solutions Ltd | Information & communication | 2024 |
| Caveat UK Ltd | Extraterritorial | 2025 |
| Cavell Rose Limited | Professional & scientific | 2011 |
| Cavell Technical Services Limited | Information & communication | 2012 |
| Cavells Limited | Extraterritorial | 2004 |
| Cavendish Autos Limited | Wholesale & retail | 2015 |
| Cavendish Management Consultants Limited | Professional & scientific | 2014 |
| Cavendish Place (Sprowston) Management Company Limited | Households | 2004 |
| Caviar Technologies Ltd | Information & communication | 2019 |
| Cavu Advisors Limited | Administrative & support | 2025 |
| Cavus Agri Limited | Extraterritorial | 2015 |
| Cawdrons Butchers Limited | Other services | 2017 |
| Cawkwell Aviation Ltd | Manufacturing | 2026 |
| Cawley Pubs & Bars Limited | Hospitality | 2018 |
| Cawston Groundworks & Construction Ltd | Construction | 2026 |
| Cawston Slurry Disposal Limited | Water & waste | 1985 |
| Cawston Tool & Machinery Hire Ltd | Administrative & support | 2017 |
| Cazalet Harrison Wine Merchants Ltd | Wholesale & retail | 2019 |
| CB Commercial Finance Ltd | Financial services | 2024 |
| CB Cricket Coaching Ltd | Administrative & support | 2011 |
| CB Design & Build Services Ltd | Construction | 2020 |
| CB Hospitality Limited | Hospitality | 2016 |
| CB Neurology Limited | Health & social care | 2023 |
| CB Recruitment Ltd | Administrative & support | 2021 |
| CB Waste and Recycling Ltd | Water & waste | 2010 |
| Cb-Bb Ltd | Professional & scientific | 2018 |
| CBM Marine Ltd | Manufacturing | 2026 |
| CBM Peterborough Ltd | Wholesale & retail | 2021 |
| CBS Properties (Norwich) Limited | Real estate | 2021 |
| CBS Removals Ltd | Transport & logistics | 2019 |
| CC Electrical & Renewables Limited | Construction | 2018 |
| CC Transport (Norfolk) Ltd | Transport & logistics | 2023 |
| CCA Telecomms Limited | Information & communication | 2011 |
| CCG Services Limited | Wholesale & retail | 2016 |
| Ccity IT Recruitment Limited | Administrative & support | 2009 |
| Ccjb Music Ltd | Information & communication | 2024 |
| CCK Commercial Property Limited | Real estate | 2026 |
| CCK Group Holdings Limited | Financial services | 2026 |
| CCL (Norwich) Limited | Financial services | 2023 |
| Ccsigns Limited | Manufacturing | 1988 |
| CD Property Letting Limited | Real estate | 2022 |
| CD Services (Norfolk) Ltd | Construction | 2025 |
| CD2 Solutions Ltd | Information & communication | 2011 |
| CDB Group Surrey Limited | Construction | 2012 |
| CDG Plumbing & Heating Limited | Construction | 2003 |
| CDI Newco Limited | Financial services | 2022 |
| CDI Tech Ltd | Information & communication | 2025 |
| CDM Business Services Ltd | Administrative & support | 2003 |
| CDM Contract Solutions Limited | Construction | 2010 |
| CDM Expert Limited | Other services | 2017 |
| Cdm&S Ltd | Hospitality | 2025 |
| Cdmc Financial Ltd | Professional & scientific | 2025 |
| CDT Legacy Ltd | Hospitality | 2020 |
| Cdwood Limited | Real estate | 2020 |
| Ceada Environmental Ltd | Professional & scientific | 2017 |
| Ceased Trading 11392250 Ltd | Administrative & support | 2018 |
| Cecilian Ventures (UK) Ltd | Financial services | 2022 |
| Cedar Court Management Company (Dereham) Limited | Households | 2006 |
| Cedars Live Sport and Social Ltd | Hospitality | 2024 |
| Cedat Profecta Properties Ltd | Real estate | 2016 |
| CEJ Financial Consulting Limited | Financial services | 2018 |
| Ceker Limited | Wholesale & retail | 2020 |
| CEL SPV1 Ltd | Construction | 2023 |
| Celex Trading Limited | Wholesale & retail | 2005 |
| Cellexcel Ltd | Professional & scientific | 2021 |
| Celline Construction Ltd | Construction | 2024 |
| Celo Consulting Limited | Professional & scientific | 2014 |