| Cash & Carry Windows (Midlands) Limited | Manufacturing | 2000 |
| Casl EOT Limited | Extraterritorial | 2021 |
| Cast Hull Limited | Manufacturing | 1970 |
| Cast OFF Tackle Ltd | Wholesale & retail | 2019 |
| Castle & Hall Ltd | Construction | 2021 |
| Castle Carpets (Shirebrook) Limited | Wholesale & retail | 2003 |
| Castle Carpets Wholesale Limited | Wholesale & retail | 2010 |
| Castle Croft Properties Limited | Real estate | 2020 |
| Castle Homes (Bolsover) Ltd | Construction | 2026 |
| Castle Homes (Chesterfield) Limited | Construction | 2008 |
| Castle Stonebridge Limited | Financial services | 2021 |
| Castle Street Garage Limited | Wholesale & retail | 2003 |
| Castle Tea Rooms Ltd | Hospitality | 2024 |
| Castle View 1960 Limited | Extraterritorial | 2014 |
| Castlecoders Ltd | Information & communication | 2015 |
| Castlegate 410 Limited | Professional & scientific | 2005 |
| Castlewood Property Ltd | Real estate | 2019 |
| Cat: Chalan Animal Therapy Ltd | Hospitality | 2018 |
| Catchola Technology Ltd | Wholesale & retail | 2020 |
| Catering 4 U Limited | Hospitality | 2015 |
| Catering Design Projects Ltd | Hospitality | 2013 |
| Catering Projects (Topco) Limited | Financial services | 2019 |
| Catering Projects Holdings Limited | Financial services | 2023 |
| Catering Projects Limited | Hospitality | 2004 |
| Catering Projects Shop Ltd | Hospitality | 2013 |
| Cathelco Holdings Ltd | Financial services | 2018 |
| Cathelco Limited | Manufacturing | 1956 |
| Catherine Jayne Ltd | Information & communication | 2025 |
| Catherwood Property Ltd | Real estate | 2023 |
| Cathmal Limited | Real estate | 2006 |
| Cathy Smith Independent Financial Advice Limited | Professional & scientific | 2017 |
| Caton Enterprises Limited | Wholesale & retail | 2001 |
| Cats and Dogs Limited | Wholesale & retail | 2007 |
| Cavalry Hill Management Company Limited | Households | 2008 |
| Cavendish Consult Limited | Professional & scientific | 2013 |
| Cavendish Dore Ltd | Health & social care | 2024 |
| Cavendish Mechanical & Electrical Ltd | Construction | 2020 |
| Cavendish Motors Limited | Wholesale & retail | 2012 |
| Cavendish Park 2017 Limited | Households | 2017 |
| Cavendish Pest Control Ltd | Administrative & support | 2025 |
| Cavendish Residential Limited | Real estate | 2015 |
| CB Chesterfield Limited | Wholesale & retail | 2012 |
| CB IT Consultancy (Alfreton) Ltd | Information & communication | 2017 |
| CB Logistics Support Ltd | Administrative & support | 2013 |
| CBC Hayes Management Company Limited | Real estate | 2005 |
| CBD Training Limited | Professional & scientific | 1998 |
| CBS Engineering Services Limited | Professional & scientific | 2019 |
| Ccjrecovery 247 Ltd | Transport & logistics | 2025 |
| CCM Change Consultancy Ltd | Professional & scientific | 2021 |
| CCM Holdings Limited | Real estate | 2013 |
| CD Cornerstone Ltd | Real estate | 2026 |
| CDH Facilities Management Ltd | Construction | 2024 |
| CDI GAS Ltd | Construction | 2024 |
| CDI Professional Limited | Transport & logistics | 2022 |
| CDI Transport Limited | Transport & logistics | 2016 |
| CDP Plant Hire & Sales Limited | Administrative & support | 2016 |
| CDP Plant Limited | Mining & quarrying | 1991 |
| CDS Commercial & Domestic Services Ltd | Administrative & support | 2015 |
| CE Geotech Ltd | Construction | 2017 |
| Ceado (UK) Ltd | Wholesale & retail | 2015 |
| Cedar and White Properties Ltd | Real estate | 2025 |
| Cedar Electrical Chesterfield Ltd | Construction | 2022 |
| Cedr Construction Ltd | Construction | 2018 |
| CEG (Chesterfield) Ltd | Manufacturing | 2003 |
| CEH Consultancy Ltd | Professional & scientific | 2024 |
| Ceiling Pro (Chesterfield) Limited | Administrative & support | 2008 |
| Celebrating HER CIC | Administrative & support | 2026 |
| Celestia Tallow Ltd | Wholesale & retail | 2025 |
| Celestiform 3D Ltd | Wholesale & retail | 2025 |
| Cellar Doors Inkersall) Limited | Hospitality | 2015 |
| Cellocom Ltd | Information & communication | 2018 |
| Cellvula Health Ltd | Wholesale & retail | 2025 |
| Celsius Parc Limited | Real estate | 2013 |
| Celtic Rose Needlecraft Limited | Wholesale & retail | 2007 |
| Celtic Surveys Limited | Other services | 2005 |
| Central Cars (Chesterfield) Limited | Transport & logistics | 2004 |
| Central Electrical Limited | Manufacturing | 2006 |
| Central Paving Chesterfield Ltd | Construction | 2017 |
| Central Plumbing & Heating Engineers Ltd | Construction | 2025 |
| Central Technology Limited | Information & communication | 2002 |
| Central Technology Networks Ltd | Extraterritorial | 2004 |
| Central Truck Bodies Limited | Extraterritorial | 1997 |
| Central Yokoten Limited | Information & communication | 2025 |
| Centre for Excellency & Equality Limited | Transport & logistics | 2023 |
| Centremark Cars Ltd | Wholesale & retail | 2015 |
| Centroenergie Services Limited | Wholesale & retail | 2026 |
| Centuries Limited | Professional & scientific | 2009 |
| Century Fabrications Limited | Manufacturing | 2000 |
| Certax Accounting Limited | Professional & scientific | 1999 |
| Certora (2025) Limited | Financial services | 2025 |
| Certora Limited | Other services | 2017 |
| Certora Training Limited | Education | 2013 |
| Certora U.K. Limited | Extraterritorial | 2024 |
| Certus Automation Ltd | Professional & scientific | 2025 |
| Cestrefeld Service Station Limited | Real estate | 1964 |
| CFC 2001 Ltd | Arts & recreation | 2001 |
| CG Fire & Electrical Ltd | Construction | 2024 |
| CGC - Connor Gregory Care Limited | Health & social care | 2020 |
| CGH Services Ltd | Professional & scientific | 2025 |
| CGP Group Holdings Limited | Construction | 2022 |