| CR Plumbing & Heating Limited | Construction | 2013 |
| CR Powerclean Limited | Administrative & support | 2016 |
| CR Roofing Services Ltd | Construction | 2023 |
| Crackin Haus Limited | Construction | 2026 |
| Craft Allotments C.I.C. | Education | 2018 |
| Craft Avenue Ltd | Wholesale & retail | 2019 |
| Crafter Bella Limited | Other services | 2021 |
| Crafty TAP Beer Company Ltd | Hospitality | 2018 |
| Craig Stephenson Travel Ltd | Administrative & support | 2025 |
| Cranecert Limited | Manufacturing | 2021 |
| Crawford HR Ltd | Administrative & support | 2022 |
| Crawshaw Property Management Limited | Real estate | 2025 |
| Create Adventures Limited | Education | 2018 |
| Create Learn Inspire Ltd | Education | 2011 |
| Create Property Group Ltd | Real estate | 2020 |
| Creation of Olives Ltd | Manufacturing | 2023 |
| Creative Accounting (Barnsley) Limited | Professional & scientific | 2009 |
| Creative Cutting Rooms Ltd | Other services | 2019 |
| Creative Property Solutions UK Ltd | Construction | 2022 |
| Creative Seating Installations Limited | Construction | 2023 |
| Creovai UK Ltd | Information & communication | 2017 |
| Crescent Candles Ltd | Wholesale & retail | 2021 |
| Crescent HQ Ltd | Administrative & support | 2025 |
| Crest Home Improvements Limited | Other services | 2017 |
| Crewber Ltd | Information & communication | 2025 |
| Crgm Ltd | Construction | 2021 |
| CRH Geoservices Limited | Professional & scientific | 2023 |
| Cridan Cafe Ltd | Hospitality | 2024 |
| Cridan Property Ltd | Real estate | 2026 |
| Cridan Trading Ltd | Wholesale & retail | 2021 |
| Crisscraft Ltd | Wholesale & retail | 2025 |
| Critical Flow Solutions Holdings UK Limited | Financial services | 2024 |
| Critical Power CX Services Ltd | Construction | 2024 |
| CRK Consulting Limited | Professional & scientific | 2017 |
| Crlsr LLP | | 2025 |
| CRM Property Maintenance Ltd | Construction | 2025 |
| Croft Marketing (Property) Limited | Administrative & support | 2011 |
| Crofton Carpets Ltd | Wholesale & retail | 2006 |
| Crone Properties Limited | Construction | 2018 |
| Crook House Management Company Limited | Households | 2002 |
| Crosby Financial Planning Ltd | Professional & scientific | 2020 |
| Crosby Investments Limited | Manufacturing | 1997 |
| Cross Atlantic Partners Ltd | Administrative & support | 2021 |
| Cross Close Developments Limited | Construction | 2017 |
| Crossco (1433) Limited | Extraterritorial | 2018 |
| Crossco (1434) Limited | Extraterritorial | 2018 |
| Crossfire Communications Ltd | Administrative & support | 2017 |
| Crossland Burks Property Limited | Real estate | 2022 |
| Crossland Yates Estates Limited | Real estate | 2017 |
| Crossroads (Barnsley) Ltd | Administrative & support | 1997 |
| Crown Canfield Ltd | Hospitality | 2016 |
| Crown Farm Services Limited | Manufacturing | 2022 |
| Crown Homes Developments Limited | Construction | 2019 |
| Crown Management Solutions Ltd | Other services | 2011 |
| Crown Metro Ltd | Wholesale & retail | 2019 |
| Crown Training Solutions Ltd | Professional & scientific | 2011 |
| Crowther Enterprises Limited | Professional & scientific | 2022 |
| CRS Northern Limited | Construction | 2016 |
| CRT Community Enterprises Limited | Construction | 2013 |
| CRT Property Investments Limited | Real estate | 2013 |
| CRT Renewable Energy Limited | Administrative & support | 2011 |
| Crumbs Diner Ltd | Hospitality | 2019 |
| Cryms Trans Ltd | Transport & logistics | 2019 |
| Cryotherapy Barnsley Limited | Health & social care | 2017 |
| Crystal Bridal Accessories Limited | Wholesale & retail | 2012 |
| Crystal Car Wash PVT Ltd | Administrative & support | 2025 |
| Crystal Clean by Tess Ltd | Administrative & support | 2026 |
| Crystal Sound and Leisure Ltd | Manufacturing | 2019 |
| CS Roofing & Property Maintenance Ltd | Construction | 2025 |
| CS Socialwork Solutions Limited | Health & social care | 2017 |
| Csda Logistics Ltd | Transport & logistics | 2024 |
| CSG Transport Limited | Transport & logistics | 2014 |
| CSH Joinery Ltd | Construction | 2022 |
| CSI Investing Limited | Financial services | 2023 |
| CSM Care Services Ltd | Health & social care | 2013 |
| Csnsuk Limited | Wholesale & retail | 2019 |
| CSP Systems Limited | Wholesale & retail | 2016 |
| CSR Scaffolding Services Ltd | Construction | 2023 |
| CSR Staffing Group Ltd | Administrative & support | 2017 |
| CSV Construction & Training Ltd | Education | 2018 |
| CT Associates Limited | Other services | 2019 |
| CT Utilities (Yorkshire) Ltd | Construction | 2022 |
| CTC Aggregates Ltd | Construction | 2020 |
| CTC Plastering and Property Maintenance Limited | Construction | 2023 |
| CTE Contractors Limited | Construction | 2004 |
| CTS Property Developments Ltd | Construction | 2009 |
| Cubic Property Management Limited | Administrative & support | 2008 |
| Cucutianu Limited | Transport & logistics | 2025 |
| Cudworth 1961 Limited | Extraterritorial | 2014 |
| Cudworth Car Valeting Limited | Administrative & support | 2025 |
| Cudworth Community Enterprises | Health & social care | 1998 |
| Cudworth Dental Surgery Limited | Health & social care | 2007 |
| Cudworth Fencing Manufacturing Limited | Manufacturing | 2023 |
| Cudworth Kitchens & Bathrooms Limited | Other services | 2016 |
| Cullen & LEE Holdings Limited | Real estate | 2025 |
| Cult Stuff Ltd | Wholesale & retail | 2025 |
| Cultrix Limited | Information & communication | 2002 |
| Cultural Connection (UK) Limited | Education | 2000 |
| Culture, Health & Wellbeing Alliance CIC | Other services | 2019 |
| Cupid Connections Ltd | Wholesale & retail | 1999 |