| Chun and TAO Ltd | Hospitality | 2025 |
| Church House Gardens Limited | Households | 2008 |
| Churchill Gardens Limited | Professional & scientific | 1987 |
| Chya Limited | Wholesale & retail | 2015 |
| Cians Little Trotters CIC | Arts & recreation | 2026 |
| Cinar ADA Limited | Hospitality | 2025 |
| Ciprian Madalin Transport Ltd | Transport & logistics | 2022 |
| Circle Business Coaching Ltd | Administrative & support | 2015 |
| Circus Starz CIC | Arts & recreation | 2025 |
| Citrus Risk Management Ltd | Financial services | 2016 |
| City Signs Print and Design Limited | Manufacturing | 2003 |
| Civic Corner Limited | Hospitality | 2020 |
| CJB Property Management Limited | Other services | 2026 |
| CJC Power Services Ltd. | Manufacturing | 2018 |
| Cjeri Ltd | Health & social care | 2023 |
| CJS Accountancy Solutions Ltd | Professional & scientific | 2021 |
| CK Key Clearance Ltd | Wholesale & retail | 2020 |
| CL Shaw Holdings Limited | Real estate | 2021 |
| Cladbond Aluminium Composite Panel Limited | Manufacturing | 2025 |
| Claire Lowe Ltd | Financial services | 2022 |
| Claire Oldham-West Ltd. | Health & social care | 2021 |
| Claire Singlehurst Coaching & Consultancy Limited | Professional & scientific | 2026 |
| Clare James Limited | Wholesale & retail | 2026 |
| Claremont Stratagem Ltd | Arts & recreation | 2025 |
| Clarence George Limited | Real estate | 2018 |
| Clarks Real Estate Limited | Real estate | 2025 |
| Class Above Ltd | Other services | 2025 |
| Class Pizza Limited | Hospitality | 2021 |
| Cleaning & Hygiene Ltd | Administrative & support | 2022 |
| Cleaning Smart VG Ltd | Administrative & support | 2025 |
| Cleanstamped Ltd | Information & communication | 2026 |
| Cleanwright Limited | Manufacturing | 2001 |
| Clear Right Limited | Professional & scientific | 2013 |
| Clements Quality Cars Limited | Wholesale & retail | 2005 |
| Click & Clear Rubbish Removal Ltd | Water & waste | 2020 |
| Click and Clear Waste Solutions Ltd | Water & waste | 2019 |
| Click Circle Ltd | Administrative & support | 2024 |
| Clinical Psychology Services North West Ltd | Other services | 2018 |
| Clipstone Bamboo Limited | Hospitality | 2023 |
| Clipstone Barbers Limited | Other services | 2023 |
| Clipstone Park Estates Limited | Real estate | 2000 |
| Clipstone Pizza & Grill Ltd | Hospitality | 2025 |
| Clive Lancaster and Son's Limited | Wholesale & retail | 2013 |
| Closure of Samsw Limited | Hospitality | 2013 |
| Clothingsites Holdings Limited | Professional & scientific | 2016 |
| CLOUD1ST Solutions Ltd | Information & communication | 2022 |
| Cloudale Management Limited | Households | 1987 |
| Cloudeagis Ltd | Information & communication | 2025 |
| Cloudspan Consultancy Ltd | Information & communication | 2025 |
| Clumber Consultancy Limited | Other services | 2014 |
| Clumber Consultancy Pension Trustees Limited | Financial services | 2016 |
| Clumber Court (Warsop) Management Company Limited | Households | 2021 |
| Cmcg Site Services Ltd | Construction | 2015 |
| CN Nails Spa Beauty Ltd | Other services | 2021 |
| CNC Technologies Ltd | Professional & scientific | 2019 |
| Cnem Engineering Ltd | Construction | 2017 |
| Cnrc Services Limited | Construction | 2025 |
| Co-Medical Ltd | Health & social care | 2024 |
| Coach House Leisure Ltd | Wholesale & retail | 2025 |
| Coach Train Grow Ltd | Education | 2024 |
| Coachspar Limited | Manufacturing | 2017 |
| Coal Bicycles Ltd | Manufacturing | 2020 |
| Coates Services Ltd | Transport & logistics | 2023 |
| Cobin Digital Solutions Limited | Information & communication | 2026 |
| Cobra Haulage Limited | Transport & logistics | 2022 |
| Cockett Homes Ltd | Construction | 2012 |
| Coco.Bay Studios Ltd | Other services | 2024 |
| Codar Associates Limited | Information & communication | 2014 |
| Coffee Bistro Ltd | Hospitality | 2024 |
| Coffee Hideout Woodthorpe Limited | Hospitality | 2018 |
| Coffee Therapy Roasters Ltd | Wholesale & retail | 2022 |
| Cognarta Ltd | Information & communication | 2014 |
| Cognizant Management Consultants Limited | Professional & scientific | 2019 |
| Cohen & Lockey Limited | Other services | 2013 |
| Cohort Property Ltd | Real estate | 2022 |
| Cohort Security Group Ltd | Administrative & support | 2019 |
| Colin Hinchley Limited | Real estate | 2016 |
| Colina Property Services Holdings Limited | Financial services | 2022 |
| Colina Property Services Limited | Real estate | 2016 |
| Collect Your Debt Limited | Administrative & support | 2021 |
| Collection Cases Ltd | Wholesale & retail | 2026 |
| Colourhill (Beeston) Ltd | Construction | 2018 |
| Comelec Limited | Construction | 2005 |
| Commercial and Construction Insurance Brokers Limited | Financial services | 1998 |
| Commercial Stores Limited | Wholesale & retail | 2022 |
| Commercial Vending Services Limited | Wholesale & retail | 2013 |
| Competing With Cancer Limited | Health & social care | 2017 |
| Complete Programming Solutions Ltd | Professional & scientific | 2020 |
| Complete Sign Experience Limited | Manufacturing | 1994 |
| Compli Digital Ltd | Water & waste | 2025 |
| Compliant EPC Domestic Limited | Professional & scientific | 2019 |
| Compliant EPC Limited | Professional & scientific | 2017 |
| Compliant Joinery Services Ltd | Construction | 2019 |
| Comply at Work Ltd | Administrative & support | 2011 |
| Concept Performance Ltd | Wholesale & retail | 2013 |
| Concept Project Solutions Ltd | Construction | 2026 |
| Concrew Training Limited | Education | 2014 |
| Confident Financial Solutions Ltd | Financial services | 2024 |
| Confluence Valley Concept (CVC) Limited | Real estate | 2023 |
| Conjungotraining Limited | Information & communication | 2025 |