| Cloud Dote Limited | Wholesale & retail | 2024 |
| Cloud Engine Limited | Information & communication | 2015 |
| Cloud ERP Limited | Information & communication | 2004 |
| Cloud Factory Ltd | Other services | 2023 |
| Cloud First Academy Limited | Professional & scientific | 2019 |
| Cloud Line Limited | Wholesale & retail | 2025 |
| Cloud Logistics Ltd | Transport & logistics | 2026 |
| Cloud Media Ltd | Professional & scientific | 2009 |
| Cloud Migration Solutions Ltd | Professional & scientific | 2014 |
| Cloud Planning Ltd | Information & communication | 2020 |
| Cloud Vantage UK Ltd | Information & communication | 2024 |
| Cloudcall Group Limited | Information & communication | 2005 |
| Cloudcall Limited | Information & communication | 2005 |
| Cloudcartuk Ltd | Wholesale & retail | 2026 |
| Cloudit Software Ltd | Information & communication | 2022 |
| Cloudnestt Limited | Manufacturing | 2025 |
| Cloudxpress Limited | Information & communication | 2025 |
| Cloudynx Ltd | Information & communication | 2025 |
| Clouknow Tech Ltd | Information & communication | 2025 |
| Clova House Ltd | Health & social care | 2015 |
| Clovelli Ltd | Wholesale & retail | 2013 |
| Clover Learning Community CIC | Education | 2020 |
| CLP Desford Limited | Agriculture & fishing | 2020 |
| CLP Roofing Ltd | Construction | 2014 |
| CLP Social Compliance Audits Ltd | Professional & scientific | 2023 |
| CLT Leicester Limited | Transport & logistics | 2025 |
| Club AI Group Ltd | Information & communication | 2025 |
| Club Masti Leicester Ltd | Hospitality | 2019 |
| Club Olympus Limited | Professional & scientific | 2004 |
| Club Padelite Limited | Arts & recreation | 2025 |
| Club Voyages Ltd | Administrative & support | 2022 |
| Clubhouse 19 Ltd | Hospitality | 2025 |
| Clubszone CZ Limited | Education | 2012 |
| Clubview Ltd | Information & communication | 2019 |
| Cluster Technology Limited | Information & communication | 2025 |
| Clutch and Bonnet Ltd | Wholesale & retail | 2021 |
| Clutch Parts Limited | Wholesale & retail | 2011 |
| CLW Holdings Ltd | Wholesale & retail | 2019 |
| Clwyd Associates Limited | Professional & scientific | 2003 |
| Clyops Group Limited | Information & communication | 2026 |
| CM Bros Investments Ltd | Real estate | 2020 |
| CM-PMS69 Ltd | Households | 2020 |
| CMA Services Ltd | Administrative & support | 2026 |
| CMB Logistics Leics Ltd | Transport & logistics | 2023 |
| CME (Leeds) Ltd | Hospitality | 2008 |
| CME Electrical Solutions Ltd | Construction | 2025 |
| Cmfc Construction Limited | Construction | 2020 |
| CMH Geoenvironmental Limited | Professional & scientific | 2019 |
| CMI Concrete Machinery Limited | Manufacturing | 2015 |
| CMI International Limited | Manufacturing | 2015 |
| CMI Roadbuilding Limited | Manufacturing | 2013 |
| Cmis Consulting Limited | Professional & scientific | 2014 |
| CMJ Mccarthy Ltd | Manufacturing | 2015 |
| Cmmk Properties Limited | Real estate | 2018 |
| Cmoraes Property Investments Ltd | Real estate | 2019 |
| CMR Brickwork Specialists Ltd | Construction | 2018 |
| CMR Construction and Ponds Ltd | Construction | 2025 |
| CMR Midlands Group Limited | Manufacturing | 2023 |
| CMT Exports Limited | Wholesale & retail | 2024 |
| CMT Investments Limited | Households | 2024 |
| CMT Real Estate Ltd | Real estate | 2022 |
| CMT Trans Ltd | Transport & logistics | 2017 |
| Cmtl (JF) Limited | Professional & scientific | 1974 |
| Cmtl Limited | Professional & scientific | 2011 |
| CMV Enterprises Ltd | Wholesale & retail | 2022 |
| CMV Ventures Ltd | Financial services | 2025 |
| CMY Consultant and Maintenance Limited | Professional & scientific | 2024 |
| CN Grass-Fields Limited | Wholesale & retail | 2024 |
| CN Mobile Solutions Ltd | Information & communication | 2025 |
| CN Plumbing Heating and Pipework Services Ltd | Construction | 2020 |
| CN Sports and Artists Management Ltd | Arts & recreation | 2024 |
| CNC Beds Ltd | Wholesale & retail | 2023 |
| CNC Check Machine Tools Ltd | Manufacturing | 2000 |
| CNC Direct Engineering Ltd | Manufacturing | 2010 |
| CNC Engineering Limited | Manufacturing | 2026 |
| CNC Global Ltd | Wholesale & retail | 2022 |
| CNC Leicester Limited | Manufacturing | 2011 |
| CNC Machine Training Limited | Professional & scientific | 2018 |
| CNC Machinery Solutions Limited | Manufacturing | 2010 |
| CNC Precision Engineering Ltd | Manufacturing | 2023 |
| Cnelson Properties Ltd | Real estate | 2023 |
| CNJ Insulations (Holdings) Limited | Financial services | 2022 |
| CNJ Insulations Limited | Construction | 2018 |
| Cnsd Ltd | Wholesale & retail | 2023 |
| Co & Co International Ltd | Administrative & support | 2020 |
| Co-Operative of Leicestershire Organic Growers Ltd | Agriculture & fishing | 2006 |
| Co-Signed Food Manufacturer (Legality) Consultancy Ltd | Professional & scientific | 2018 |
| COA Promotions Limited | Health & social care | 2015 |
| Coach Pause Mindset Ltd | Education | 2025 |
| Coach Recruitment Limited | Administrative & support | 2022 |
| Coached by Life Limited | Arts & recreation | 2023 |
| Coached by SG Ltd | Arts & recreation | 2022 |
| Coaches Solutions Limited | Administrative & support | 2025 |
| Coaching & Consultancy Ltd | Professional & scientific | 2020 |
| Coactive Solutions Limited | Information & communication | 2001 |
| Coalface Engagement Ltd | Professional & scientific | 2018 |
| Coalition Performance Ltd | Arts & recreation | 2015 |
| Coalville Cabs Limited | Transport & logistics | 2015 |
| Coast 2 Coast Caravan Hire Limited | Administrative & support | 2016 |
| Coast 2 Coast Entertainment Limited | Administrative & support | 2016 |