| Centech Limited | Extraterritorial | 2006 |
| Central Coachways Limited | Transport & logistics | 2025 |
| Centralcoaches Ltd | Transport & logistics | 2012 |
| Cepha Group Ltd | Real estate | 2026 |
| CF Painting & Decorating Ltd | Construction | 2019 |
| CGB Building Services Ltd | Construction | 2023 |
| Chadlington Foods Limited | Wholesale & retail | 2026 |
| Chambers Developments & Renovations Limited | Financial services | 2026 |
| Chandler (Farms) Limited | Agriculture & fishing | 2002 |
| Chandler's Hatcheries | Financial services | 1941 |
| Chapel Food Services Consultants Ltd | Hospitality | 2014 |
| Chapmans Financial LLP | | 2012 |
| Char Peas Ltd | Real estate | 2016 |
| Charma Lettings Ltd | Real estate | 2021 |
| Charnwood Commercial Bodies Ltd | Manufacturing | 2020 |
| Charnwood Country Homes Ltd | Construction | 2020 |
| Charnwood Food Safety Limited | Professional & scientific | 2002 |
| Charnwood Group Limited | Financial services | 2019 |
| Charnwood Services Limited | Wholesale & retail | 2019 |
| Charters Carpet Warehouse Ltd | Wholesale & retail | 2025 |
| Charub Ltd | Construction | 2011 |
| CHB Lettings Ltd | Real estate | 2024 |
| Chef James Birchall Ltd | Hospitality | 2019 |
| Chelsea House Holdings Ltd | Extraterritorial | 2020 |
| Cherie Ellis Limited | Information & communication | 2016 |
| Cherry Fowler Associates Limited | Professional & scientific | 2015 |
| Chetwode Talbot Limited | Professional & scientific | 2025 |
| Chetwode Trustees 1 Limited | Administrative & support | 2024 |
| Chetwode Trustees 2 Limited | Administrative & support | 2024 |
| CHF Solutions Limited | Wholesale & retail | 2019 |
| Chicsunglasses Ltd | Wholesale & retail | 2014 |
| Chil Construction Limited | Construction | 2025 |
| Chiltern Industries Limited | Financial services | 2019 |
| Choliver Limited | Professional & scientific | 2016 |
| Chosen Relics Ltd | Wholesale & retail | 2024 |
| Choyce Components Limited | Manufacturing | 2015 |
| Choyce Homes Ltd | Construction | 2020 |
| Chrio & Osprey Ltd | Professional & scientific | 2021 |
| Christopher Daniel Ltd | Wholesale & retail | 2012 |
| Chung's Cottage Ltd | Hospitality | 2023 |
| Church Street Practice (Melton Mowbray) Limited | Administrative & support | 2014 |
| Cicatrices Research Consulting Limited | Other services | 2017 |
| Cinemack Media Ltd | Manufacturing | 2020 |
| Citywide Maintenance Solutions Limited | Construction | 2024 |
| CJ Developments (Midlands) Ltd | Construction | 2015 |
| CJ Rodrigues Joinery Limited | Manufacturing | 2024 |
| CJR Dry-Lining Specialists Limited | Construction | 2023 |
| CKM Marketing Ltd | Other services | 2019 |
| CKV Limited | Wholesale & retail | 2017 |
| Claire Lomas Ltd | Other services | 2018 |
| Clare Miles HR Limited | Professional & scientific | 2012 |
| Clarrett Leisure Limited | Wholesale & retail | 2011 |
| Clean Air Power GT Limited | Professional & scientific | 2016 |
| Clean Slate Services Ltd | Administrative & support | 2026 |
| Cleaning Crew 25 Ltd | Administrative & support | 2025 |
| Clearsound Holding Limited | Financial services | 2023 |
| Clippasafe Limited | Manufacturing | 1958 |
| Clock House Consulting Ltd | Professional & scientific | 2016 |
| Clockwork Group Ltd | Professional & scientific | 2021 |
| Club 223 Ltd | Arts & recreation | 2025 |
| CLW Property Group Ltd | Households | 2026 |
| CNL Distributions Ltd | Wholesale & retail | 2025 |
| Coates Franklin Ltd | Professional & scientific | 2000 |
| Cobalt Accountants Limited | Professional & scientific | 2021 |
| Coffee Shack Limited | Hospitality | 2023 |
| COGNIV8 Ltd | Information & communication | 2013 |
| Cohring Capital Investments Ltd | Financial services | 2025 |
| Colin Newell Limited | Construction | 2014 |
| Colin S Newell Ltd | Construction | 2014 |
| Colour Consultancy Ltd | Professional & scientific | 2005 |
| Colour Your Streets Limited | Information & communication | 2024 |
| Commercial Special Projects Limited | Professional & scientific | 2012 |
| Compac Civils Limited | Construction | 2022 |
| Compac Hire Ltd | Construction | 2014 |
| Compac Holdings Ltd | Other services | 2018 |
| Company Guardian Limited | Professional & scientific | 2010 |
| Compass Winches Limited | Wholesale & retail | 2017 |
| Compassionate Care for ALL Limited | Health & social care | 2015 |
| Compi Solution Limited | Information & communication | 2013 |
| Concept Decorating & Painting Ltd | Construction | 2019 |
| CONFIDENCE2CARE Training & Event Medics Ltd | Education | 2024 |
| Conni's Cakes, Cookies and Coffee Ltd | Manufacturing | 2024 |
| Consam Manufacturing Ltd | Manufacturing | 2020 |
| Constant MIX Limited | Professional & scientific | 2013 |
| Construct - IT Limited | Construction | 2014 |
| Construct Media Group Limited | Information & communication | 2018 |
| Construction Coach Limited | Professional & scientific | 2014 |
| Consultguru Ltd | Professional & scientific | 2021 |
| Contex Associates Limited | Professional & scientific | 1988 |
| Controlcontrol Ltd | Manufacturing | 2022 |
| Cooke Contractors Limited | Construction | 2020 |
| Cooks Cider Ltd | Agriculture & fishing | 2017 |
| Cool Care With Comfort Limited | Administrative & support | 2022 |
| Cool Socks Limited | Manufacturing | 2009 |
| COOL4ACAT Properties Limited | Real estate | 2017 |
| Copper Ingot Co. Limited | Manufacturing | 2026 |
| Copperdale Consulting Ltd | Professional & scientific | 2009 |
| Corah and Corah Limited | Professional & scientific | 2017 |
| Corarbor Limited | Real estate | 2020 |
| Cornell Plumbing and Heating Ltd | Construction | 2023 |