| Castlebay Builders Limited | Construction | 2016 |
| Castlegate Treasury Ltd | Professional & scientific | 2018 |
| Cater Residentials Ltd | Real estate | 2016 |
| Cato Music Limited | Arts & recreation | 2001 |
| Caveman Ltd | Information & communication | 2025 |
| CB Switchgear Ltd | Manufacturing | 2025 |
| CC Bodywork Limited | Wholesale & retail | 2022 |
| CC Cleaning Limited | Administrative & support | 2006 |
| CCM Autos Ltd | Wholesale & retail | 2025 |
| CDK Property Group Ltd | Construction | 2026 |
| CDL Mobile Services Ltd | Construction | 2025 |
| Cdmw Properties Ltd | Real estate | 2023 |
| Cdoh Associates Ltd. | Professional & scientific | 2016 |
| CDW Yorkshire Ltd | Construction | 2025 |
| Ceciadwoa Care Services Ltd | Health & social care | 2017 |
| CELLABAR8 Ltd | Hospitality | 2023 |
| Central Platform Services Ltd | Other services | 2008 |
| Cerberus Draughting Limited | Professional & scientific | 2007 |
| Certified Auto Hub Ltd | Wholesale & retail | 2025 |
| Certivus Ltd | Manufacturing | 2025 |
| Certus Construction Group Limited | Construction | 2017 |
| Certus Partnering Limited | Administrative & support | 2017 |
| Certus Plumbing & Heating Limited | Construction | 2026 |
| Certus Quantity Surveying Ltd | Construction | 2020 |
| Ceylon Natural Vivid Sapphires Ltd | Manufacturing | 2025 |
| CGY Property Limited | Real estate | 2018 |
| Challenga Limited | Construction | 2025 |
| Cham &Co Ltd | Professional & scientific | 2019 |
| Champion Logistics Limited | Transport & logistics | 2025 |
| Chandler and Bailey Estates Ltd | Real estate | 2023 |
| Chapman Engineering Services Ltd | Manufacturing | 2019 |
| Charlie Chaplinn Ltd | Other services | 2025 |
| Charlie Oscar Motor Company Ltd | Wholesale & retail | 2024 |
| Charlottes Sushi Co Limited | Hospitality | 2024 |
| Chase Petroleum Limited | Real estate | 2005 |
| Chene Machkumbe Limited | Public administration | 2022 |
| Chequered Flag Motorsport CIC | Other services | 2020 |
| Chessman Contracting Limited | Transport & logistics | 2026 |
| Chevron Hospitality Maintenance Limited | Public administration | 2025 |
| Chico Travel Ltd | Transport & logistics | 2017 |
| Chikukwab Limited | Health & social care | 2013 |
| Chil Trans Ltd | Transport & logistics | 2018 |
| Chin Chin Brewing Company Ltd | Manufacturing | 2015 |
| China Town Chinese Meal Limited | Hospitality | 2017 |
| Chinicom Ltd | Professional & scientific | 2008 |
| Chinos Fish Bar Limited | Hospitality | 2021 |
| Chinos Pizza Pontefract Limited | Hospitality | 2021 |
| Chirasha Limited | Health & social care | 2019 |
| CHM Holling Ltd | Wholesale & retail | 2026 |
| Choice Cars Ponte Ltd | Transport & logistics | 2022 |
| Choice Dynamic International Private Limited | Extraterritorial | 2007 |
| Chowdhury Restaurant Ltd | Hospitality | 2026 |
| Chris Clarkson Building Contractors Ltd | Construction | 2021 |
| Chris Emery Motorsport Ltd | Wholesale & retail | 2012 |
| Chris Pennock Art and Photography Limited | Wholesale & retail | 2017 |
| Chris the Counsellor Limited | Health & social care | 2024 |
| Church House Sk(Yorkshire) Limited | Hospitality | 2021 |
| Churchbalk Holdings Limited | Financial services | 2023 |
| Circuit Breaker Sales & Maintenance Services Ltd | Manufacturing | 2022 |
| Circuit Works Limited | Construction | 2023 |
| Citvir Limited | Information & communication | 2018 |
| City Barbers 2015 Ltd | Other services | 2025 |
| Civcon Civil Engineering Ltd | Construction | 2018 |
| Cj's Dampproofing & Plastering Ltd | Construction | 2025 |
| CK Dhami Limited | Information & communication | 2024 |
| CL Performance Ltd | Professional & scientific | 2024 |
| Claire Dibb Consulting Ltd | Professional & scientific | 2014 |
| Clarazon Limited | Real estate | 2012 |
| Clarity Accounting Support Ltd | Professional & scientific | 2022 |
| Classic Health Care Solutions Ltd | Health & social care | 2020 |
| Classic Healthcare Ltd | Public administration | 2023 |
| Claudiu Transport Limited | Transport & logistics | 2019 |
| Clayburn Properties Limited | Real estate | 2009 |
| Clayton Lane Boarding Kennels Ltd | Agriculture & fishing | 2022 |
| Clayton Property Management Limited | Real estate | 2011 |
| Clean 'N' Fit Ltd | Administrative & support | 2010 |
| Cleanly Limited | Extraterritorial | 2018 |
| Clear and Cloudy Ltd | Wholesale & retail | 2020 |
| Clear Wealth Management Limited | Financial services | 2008 |
| Clear Workplace Solutions Limited | Financial services | 2016 |
| Clearly London Ltd | Administrative & support | 2018 |
| Clearsafety Consultancy Limited | Professional & scientific | 2026 |
| Cleenly Limited | Extraterritorial | 2018 |
| Cleveland Rental Company Limited | Real estate | 2020 |
| Clever Clogs Day Nursery Limited | Education | 2010 |
| Clevernsmart Hospitality Consulting Ltd | Professional & scientific | 2025 |
| CLG Electrical Services Ltd | Manufacturing | 2025 |
| CLG Haulage Ltd | Transport & logistics | 2026 |
| Click Homes Yorkshire Ltd | Real estate | 2023 |
| Client Hive Recruitment Solutions Ltd | Administrative & support | 2023 |
| Climate (Yorkshire) Ltd | Construction | 2020 |
| Clish Engineering Ltd | Professional & scientific | 2024 |
| CLOTHES4SALE Shoes Ltd | Wholesale & retail | 2017 |
| Cloud Bookkeeping & Payroll Limited | Professional & scientific | 2019 |
| Clover Electrical Ltd | Construction | 2025 |
| CLS Studio Limited | Arts & recreation | 2025 |
| CLX Vape Lounge Limited | Wholesale & retail | 2025 |
| CM Wind Ltd | Energy | 2022 |
| CMS Plastering Ltd | Administrative & support | 2014 |
| CND Butterfield Limited | Professional & scientific | 2005 |