| Cenegex Hazpro Limited | Manufacturing | 2009 |
| Cenegex Limited | Financial services | 2021 |
| Cenegex Management Limited | Professional & scientific | 2019 |
| Cenegex Technologies Limited | Manufacturing | 2021 |
| Cenerva Ltd | Professional & scientific | 2017 |
| Centrepoint Projects Limited | Construction | 2017 |
| Cetorhinus Ltd | Agriculture & fishing | 2025 |
| CF Equine Ltd | Manufacturing | 2025 |
| Cfse (Scarborough) Ltd | Manufacturing | 2009 |
| CFT Solutions Ltd | Wholesale & retail | 2013 |
| Chakka Naturals Ltd | Wholesale & retail | 2017 |
| Chalmers Creative Limited | Professional & scientific | 2011 |
| Chamberlain's Kitchen Limited | Hospitality | 2022 |
| Chameleon Cafe and Restaurant Ltd | Hospitality | 2024 |
| Chandra Ltd | Wholesale & retail | 2018 |
| CHANGE55 Ltd | Professional & scientific | 2007 |
| Chaplins Nightlife Ltd | Hospitality | 2018 |
| Charisia Ltd | Health & social care | 2025 |
| Charles William Apartments Management Company Limited | Households | 2002 |
| Charlotte's of Filey Ltd | Hospitality | 2014 |
| Charlwood Hearing Care Ltd | Wholesale & retail | 2013 |
| Chatsworth Gardens Cottage Limited | Hospitality | 2022 |
| Cheaper Cartridge Limited | Wholesale & retail | 2018 |
| Chen Kinshing Limited | Hospitality | 2026 |
| Cherry Court Limited | Households | 1998 |
| Cheung's Property Group Limited | Real estate | 2017 |
| Chevin SW One Limited | Real estate | 2025 |
| Chippy's Choice Holdings Ltd | Financial services | 2025 |
| Chippy's Choice Ltd | Wholesale & retail | 2024 |
| Chiswell Associates (Promotions) Limited | Administrative & support | 2002 |
| Chr-Watches Limited | Wholesale & retail | 2017 |
| Chris Bowman Joinery & Construction Ltd | Construction | 2026 |
| Chris Bugg Ltd | Manufacturing | 2015 |
| Chris Hyde Solutions Ltd | Professional & scientific | 2019 |
| Chris Sellers Limited | Financial services | 2024 |
| Chris Sellers Property Group Limited | Real estate | 2025 |
| Chris Sellers Tyres Limited | Wholesale & retail | 2003 |
| CHT Solutions Limited | Construction | 2010 |
| Chukwunonyelum Ndekwu Limited | Health & social care | 2010 |
| Church Farm (Staintondale) Limited | Real estate | 1947 |
| Church Farm Homes Ltd | Real estate | 2019 |
| Church House Holiday Ltd | Hospitality | 2020 |
| Church Meadows (HB) Limited | Real estate | 2014 |
| CIJ Communications Limited | Information & communication | 2010 |
| Cindy's of Scarborough Ltd | Wholesale & retail | 2019 |
| Cinepath Ltd | Professional & scientific | 2025 |
| Cinnamon Scarborough Ltd | Hospitality | 2022 |
| Cito Projects Ltd | Information & communication | 2025 |
| City Point Leeds Limited Partnership | | 2004 |
| CJS David Sharron Ltd | Hospitality | 2025 |
| CKB Travel Limited | Administrative & support | 2013 |
| CL Racing Ltd | Arts & recreation | 2023 |
| CLA Real Estate Limited | Real estate | 2019 |
| Clarence House (Whitby) Management Company Ltd | Households | 2012 |
| Clarke Transformer Services Limited | Professional & scientific | 2012 |
| Clavius Films Ltd | Arts & recreation | 2021 |
| Clayduck Interactive Limited | Information & communication | 2000 |
| Clays Catering Limited | Hospitality | 2008 |
| Clayton Taverns Limited | Hospitality | 2022 |
| Cleanest Lets Ltd | Administrative & support | 2021 |
| Cleaning ETC Cleaning Services Ltd | Other services | 2020 |
| Clear Mind Advocacy CIC | Health & social care | 2026 |
| Cliff (Scarborough) Management Company Limited | Households | 1998 |
| Cliff Bridge Place Management Company (Scarborough) Ltd | Households | 2019 |
| Cliff Bridge Place Management Limited | Extraterritorial | 2014 |
| Cliff Top Boarding Kennels Limited | Administrative & support | 2002 |
| Clipper Estates Limited | Construction | 1985 |
| Clive Ranger Limited | Manufacturing | 2019 |
| CLM Auto Centre Ltd | Wholesale & retail | 2022 |
| Clock Tower Scarborough Limited | Real estate | 2019 |
| Clocks Home and Garden Ltd | Wholesale & retail | 2026 |
| Cloud Phone Company Ltd | Information & communication | 2015 |
| Cloudsands Limited | Information & communication | 2024 |
| Clyd Mewn Natur Limited | Financial services | 2024 |
| CMD Sales Ltd | Wholesale & retail | 2009 |
| CMR Marketing Ltd | Professional & scientific | 2025 |
| CNG Foodservice Equipment Limited | Administrative & support | 2001 |
| CNG Technical Limited | Extraterritorial | 2002 |
| Coach & Horses (Rillington) Limited | Hospitality | 2026 |
| Coast & Country Double Glazing Ltd | Construction | 2024 |
| Coast and County Radio FM Ltd | Extraterritorial | 2018 |
| Coast and Vale Community Action | Information & communication | 1997 |
| Coast and Vale Learning Trust | Education | 2016 |
| Coast Marine Consultants Limited | Other services | 2014 |
| Coast Risk Management Ltd | Professional & scientific | 2008 |
| Coast Tuition Community Ltd | Education | 2020 |
| Coast Tuition Ltd | Education | 2019 |
| Coastal Accounting Solutions Ltd | Professional & scientific | 2025 |
| Coastal Detailing Limited | Professional & scientific | 1999 |
| Coastal GAS & Heating Limited | Construction | 2003 |
| Coastal Growth Limited | Wholesale & retail | 2015 |
| Coastal Home Footcare Ltd | Health & social care | 2026 |
| Coastal Investment Co (Yorkshire) Ltd | Professional & scientific | 2011 |
| Coastal Removals Ltd | Transport & logistics | 2022 |
| Coastal Renewable Heating Ltd | Construction | 2017 |
| Coastal Shellfish Limited | Wholesale & retail | 2002 |
| Coastal Stock Ltd | Wholesale & retail | 2023 |
| Coastal View Cabins Limited | Hospitality | 2025 |
| Coastal Wholesale Ltd | Wholesale & retail | 2021 |
| Cober Hill Charitable Trust | Health & social care | 2015 |