| Caught Snakin Ltd | Hospitality | 2025 |
| Cavali Limited | Transport & logistics | 2025 |
| Cavalier Club Limited | Transport & logistics | 2008 |
| Cave Lakes Limited | Real estate | 2015 |
| Cave Professional Development Ltd | Education | 2025 |
| Caveman Golf Limited | Wholesale & retail | 2009 |
| Cavendish Agency Limited | Professional & scientific | 2003 |
| Cavendish Print Limited | Real estate | 1979 |
| Cavewood Caravan & Motorhome Storage Ltd | Transport & logistics | 2022 |
| Cavynor Ltd | Wholesale & retail | 2025 |
| Cawood Crewing Ltd | Agriculture & fishing | 2026 |
| Cazacu Ltd | Transport & logistics | 2025 |
| CB Investing Limited | Real estate | 2020 |
| CB London Furniture Ltd | Manufacturing | 2025 |
| CBF Investments Limited | Real estate | 2025 |
| CBG Distribution UK Ltd | Wholesale & retail | 2025 |
| CBM Business Consultancy Ltd | Professional & scientific | 2024 |
| CBR Logistics Ltd | Transport & logistics | 2021 |
| CBS Scaffolding Ltd | Construction | 2024 |
| CC Design Solutions Ltd | Professional & scientific | 2018 |
| Ccac Ltd | Construction | 2022 |
| CCP Industrial Ltd | Administrative & support | 2026 |
| CCP Residential Limited | Real estate | 2023 |
| CCT Infotech Limited | Information & communication | 1991 |
| CCT Systems Limited | Information & communication | 2014 |
| CCW Baits and Tackle Ltd | Wholesale & retail | 2019 |
| CD Fishing Ltd | Agriculture & fishing | 2024 |
| CD Services Electrical Ltd | Construction | 2006 |
| CDM Cleaning Services Limited | Administrative & support | 2009 |
| CDM Management Solutions Ltd | Construction | 2024 |
| CDS Construction and Engineering Services Ltd | Construction | 2021 |
| CDS Energy Services Limited | Construction | 2015 |
| CDS Plumbing & Heating Ltd | Construction | 2011 |
| CDX Picks Ltd | Wholesale & retail | 2025 |
| CDY EOT Ltd | Financial services | 2021 |
| CDY Holdings Ltd | Financial services | 2015 |
| CDY Property Ltd | Real estate | 2015 |
| Cebb Ventures PVT Limited | Wholesale & retail | 2025 |
| Cedarway Limited | Hospitality | 1996 |
| Cedis Limited | Hospitality | 2019 |
| CEE DEE Engineering Ltd | Manufacturing | 1998 |
| Ceepuk.Com Ltd | Manufacturing | 2023 |
| Celebration Creations Limited | Other services | 2021 |
| Celect Electrical (UK) Ltd | Construction | 2010 |
| Cellar Door Gallery Limited | Wholesale & retail | 2020 |
| Cemio Properties Ltd | Health & social care | 2025 |
| Centastage UK Limited | Professional & scientific | 2014 |
| Central Billing Ltd | Administrative & support | 2009 |
| Central Crane Hire (Hull) Limited | Administrative & support | 1986 |
| Central Hull Restaurant Limited | Hospitality | 2024 |
| Central Mini Market 1 Ltd | Wholesale & retail | 2023 |
| Central Northallerton Development Company Limited | Construction | 2015 |
| Centre of Canopy (C&C) Ltd | Other services | 2025 |
| Centreline Aviation Medical Services Ltd | Health & social care | 2013 |
| Centurion Electro-Mechanical Solutions Ltd | Construction | 2020 |
| Centurion Homes Limited | Construction | 1996 |
| Century 21 Office & Window Cleaning Services Limited | Administrative & support | 2021 |
| CEP Services Limited | Construction | 2015 |
| Ceramic Planet Limited | Wholesale & retail | 2005 |
| Ceramics UK Limited | Construction | 2019 |
| Cerros Properties Limited | Real estate | 2004 |
| Cetrex Solutions Limited | Education | 2014 |
| Ceylon Logistics Ltd | Transport & logistics | 2026 |
| CF Electrical Limited | Professional & scientific | 2009 |
| CF. Reinforced Fencing Limited | Wholesale & retail | 2024 |
| CFS Handyman Limited | Construction | 2024 |
| CG Estates Limited | Real estate | 2017 |
| CGL Properties Limited | Real estate | 2017 |
| CGS Buildings and Renovations Limited | Construction | 2026 |
| CH Property & Rentals Ltd | Real estate | 2025 |
| CH Rental Properties Ltd | Real estate | 2020 |
| CH6 Ltd | Education | 2021 |
| Chadmoore Build UK Limited | Construction | 2023 |
| Chadwick Automotive Services Ltd | Wholesale & retail | 2022 |
| Chai and Co Hull Ltd | Hospitality | 2026 |
| Chai App Limited | Extraterritorial | 2017 |
| Chai Hull Ltd Limited | Hospitality | 2025 |
| Chalice Training and Assessment Ltd | Construction | 2025 |
| Chamber Investments and Enterprise (Humber) Ltd. | Education | 1988 |
| Chamberlain Chinese Ltd | Hospitality | 2023 |
| Chambers & Fargus Limited | Manufacturing | 1989 |
| Chambers Oceanics Limited | Other services | 2001 |
| Chameleon Business Interiors Limited | Professional & scientific | 1998 |
| Chameleon Management Systems Limited | Professional & scientific | 1995 |
| Chameleon Property & Landscaping Ltd | Construction | 2024 |
| Chameleon Property Hull Limited | Construction | 2023 |
| Chandlers Court (Hull) Management Company Limited | Households | 2002 |
| Chandos Publications Limited | Information & communication | 2016 |
| Chaniel Ltd | Information & communication | 2023 |
| Chanstage Limited | Health & social care | 1988 |
| Chantelle & Danny's Coffee House Ltd | Hospitality | 2024 |
| Chanterlands Avenue Cafe & Deli Ltd | Hospitality | 2025 |
| Chanterlands Barber Limited | Other services | 2022 |
| Chanterlands Sun Hire Limited | Administrative & support | 2010 |
| Chanterlands Tree Services Limited | Administrative & support | 2019 |
| Chantilly Thoroughbreds Ltd | Arts & recreation | 2024 |
| Chantrey Park Management Company Limited | Households | 2021 |
| Chantry Way Management Company Limited | Households | 2007 |
| Chants Cafe Bar 45 Ltd | Hospitality | 2024 |
| Chants Mini Market Ltd | Wholesale & retail | 2025 |