| Caister Carpentry Ltd | Construction | 2021 |
| Caister Cars Ltd | Administrative & support | 2022 |
| Caister Fish Bar Ltd | Hospitality | 2023 |
| Caister Foot Care Podiatry Ltd | Health & social care | 2025 |
| Caister Group Limited | Financial services | 2025 |
| Caister Storage Solutions Ltd | Transport & logistics | 2017 |
| Caister Volunteer Lifeboat Service Limited | Health & social care | 1970 |
| Caldecott Golf & Country Club Limited | Extraterritorial | 2005 |
| Caldecott Leisure Ltd | Hospitality | 2020 |
| California Limited | Hospitality | 2023 |
| California Sands Holiday Park Ltd | Hospitality | 2021 |
| Cally Aesthetics Limited | Other services | 2026 |
| Calm+Collective Ltd | Wholesale & retail | 2022 |
| Calnon Properties Limited | Real estate | 2017 |
| Calver Investments Ltd | Financial services | 2021 |
| Calver's Plumbing & Heating Limited | Construction | 2018 |
| Camelot Trading Co Ltd | Wholesale & retail | 2020 |
| Campling Enterprise Ltd | Hospitality | 2017 |
| Camplings Limited | Other services | 1947 |
| Candy Kingdom Ltd | Wholesale & retail | 2026 |
| Candymail Group Ltd | Wholesale & retail | 2017 |
| Candymail UK Ltd | Wholesale & retail | 2020 |
| Caneg Limited | Professional & scientific | 2019 |
| Canterbury DRY Cleaning Limited | Other services | 2007 |
| Canvalink Ltd | Wholesale & retail | 2024 |
| Capacitate Consulting Limited | Professional & scientific | 2020 |
| Capital Investments 1989 Ltd | Real estate | 2026 |
| Capital Kebab (Great Yarmouth) Limited | Hospitality | 2017 |
| Cardels Clothing Limited | Wholesale & retail | 2024 |
| Care N Tidy Ltd | Administrative & support | 2025 |
| Care NAV Ltd | Information & communication | 2020 |
| Caring Angels Ltd | Health & social care | 2018 |
| Carl Dawson Equestrian & Garden Supplies Limited | Wholesale & retail | 2002 |
| Carlton Builders (Eastern) Ltd | Construction | 2021 |
| Carlton Urban Assets Ltd | Construction | 2026 |
| Carolina Mesas Limited | Education | 2025 |
| Cartwheelfood Ltd | Hospitality | 2025 |
| Casey Jade Shellfish Ltd | Hospitality | 2022 |
| Castell Satcom Radio Limited | Information & communication | 2003 |
| Castle Farm Countryside Classroom Ltd | Education | 2023 |
| Castle Games Limited | Arts & recreation | 1997 |
| Castle Lead Ltd | Construction | 2012 |
| Catalin Deliveries Limited | Construction | 2020 |
| Catalin Enterprise Limited | Administrative & support | 2022 |
| Catfield Van Centre Ltd | Wholesale & retail | 2025 |
| Catherine Simmonds Consultancy Ltd | Professional & scientific | 2019 |
| CC Management Services Ltd | Professional & scientific | 2022 |
| CCH Hose & Couplings Limited | Wholesale & retail | 2011 |
| CCH Kessingland Gables Ltd | Construction | 2025 |
| CCL Van Hire Limited | Transport & logistics | 2026 |
| Cctv Towers UK Ltd | Administrative & support | 2021 |
| CDP Automotive Limited | Professional & scientific | 2011 |
| CDR Systems Limited | Professional & scientific | 2004 |
| Ceanic Ltd | Mining & quarrying | 2012 |
| Cecilia's Kiosk Limited | Hospitality | 2025 |
| Cedaro Limited | Information & communication | 2017 |
| CEL Traders Ltd | Information & communication | 2026 |
| Celestial Compass Ltd | Wholesale & retail | 2024 |
| Cell Energy Limited | Construction | 2019 |
| Cell Infrastructure Limited | Extraterritorial | 2020 |
| Cema Engineering Ltd | Professional & scientific | 2021 |
| Cement-Tec Ltd | Construction | 2021 |
| Centre 81 Limited | Transport & logistics | 1995 |
| Ceraphi Drilling Solutions Ltd | Construction | 2023 |
| Ceraphi Energy Ltd | Mining & quarrying | 2013 |
| Ceraphi Energy Ventures Ltd | Mining & quarrying | 2012 |
| Ceraphi Ltd | Mining & quarrying | 2020 |
| Cerasus Attractions Ltd | Arts & recreation | 2022 |
| Cerico UK Ltd | Professional & scientific | 2009 |
| Cervo Enterprises Ltd | Professional & scientific | 2025 |
| Ceylon Retail Ltd | Wholesale & retail | 2023 |
| Chamberlins Solicitors LLP | | 2025 |
| Champ Competitions Limited | Wholesale & retail | 2022 |
| Chand Properties Limited | Real estate | 2015 |
| Chandrra Limited | Wholesale & retail | 2009 |
| Channells Norfolk Preserves Limited | Manufacturing | 2003 |
| Chapman Farms Limited | Agriculture & fishing | 2010 |
| Charge Clothing Limited | Wholesale & retail | 2010 |
| Charity & Taylor (Electronic Services) Limited | Manufacturing | 1976 |
| Charles Bycroft & Co Limited | Real estate | 2013 |
| Charles Roberts & Sons Ltd | Construction | 2021 |
| Chartervale Properties Limited | Construction | 1963 |
| Check Your Security Group Ltd | Professional & scientific | 2025 |
| Cheergrab Limited | Wholesale & retail | 2012 |
| Chemtek Limited | Wholesale & retail | 2009 |
| Cherington Enterprises Limited | Construction | 2006 |
| Chifx Ltd | Financial services | 2021 |
| Chimaera Consultants Ltd | Other services | 2024 |
| China Cottage 2023 Ltd | Hospitality | 2023 |
| China Garden 2026 Ltd | Hospitality | 2026 |
| China Garden Best Ltd | Hospitality | 2024 |
| Chips Away 2014 Limited | Hospitality | 2014 |
| Chirpy Children Ltd | Health & social care | 2020 |
| Choice Promotions Ltd | Real estate | 2009 |
| Chothy & Co Ltd | Wholesale & retail | 2022 |
| Chris Bain Financial Advice Ltd | Financial services | 2012 |
| Chris Martin Motor Engineer Limited | Wholesale & retail | 2014 |
| Chris RIX Limited | Construction | 2015 |
| Chrissies Creations Ltd | Wholesale & retail | 2025 |
| Christchurch Dental Practice Limited | Health & social care | 2010 |