| Coast to Coast Property Investment Ltd | Real estate | 2022 |
| Coat&Construct Ltd | Construction | 2025 |
| Coba Automotive (UK) Limited | Manufacturing | 1966 |
| Coba Emea Group Limited | Financial services | 2023 |
| Coba Europe Limited | Wholesale & retail | 2004 |
| Coba Holdings Limited | Financial services | 2019 |
| Coba International Limited | Professional & scientific | 2004 |
| Coba Plastics Group Limited | Financial services | 2023 |
| Coba Plastics Limited | Extraterritorial | 2018 |
| Coba Plastics Moulding Limited | Manufacturing | 2016 |
| Coba Precision Engineering Limited | Manufacturing | 1982 |
| Cobb MEP Solutions Limited | Professional & scientific | 2025 |
| Cobbled Limited | Manufacturing | 2017 |
| Cobden Fitness Centre Ltd | Arts & recreation | 2024 |
| Cobue Consulting Ltd | Information & communication | 2022 |
| Cockleshell Property Solutions LLP | | 2025 |
| Coco Designs Limited | Manufacturing | 2011 |
| Coco Investments Ltd | Real estate | 2016 |
| Coco's Nail Artistry & Beauty Ltd | Other services | 2021 |
| Cocoa Amore BC Ltd | Wholesale & retail | 2018 |
| Cocoa Amore Drinks Ltd | Manufacturing | 2023 |
| Cocoa Amore Global Ltd | Hospitality | 2017 |
| Cocoa Amore Limited | Wholesale & retail | 2013 |
| Cocoa Amore Online Limited | Wholesale & retail | 2019 |
| Cocomile Ltd | Wholesale & retail | 2022 |
| Cocoon Childcare Ltd | Health & social care | 2024 |
| COD & Coffee Ltd | Hospitality | 2025 |
| COD 2 Go Ltd | Hospitality | 2026 |
| Coda Service & Repair Ltd | Wholesale & retail | 2026 |
| Code Coventry (Gala) Limited | Construction | 2011 |
| Code Coventry Limited | Real estate | 2016 |
| Code Holdings Limited | Financial services | 2016 |
| Code Liverpool Limited | Real estate | 2016 |
| Code Projects Limited | Construction | 2023 |
| Code Rents Limited | Real estate | 2016 |
| Code Students (Nottingham) Limited | Real estate | 2020 |
| Code Students (Wellington Street) Limited | Real estate | 2016 |
| Code Students Limited | Real estate | 2016 |
| Codecall Ltd | Information & communication | 2025 |
| Codecaller Ltd | Information & communication | 2019 |
| Codequest Solutions Ltd | Information & communication | 2024 |
| Codereflex Technologies Ltd | Information & communication | 2012 |
| Codet Ltd | Information & communication | 2025 |
| Codex Labs UK Limited | Wholesale & retail | 2018 |
| Codexia Technology Ltd | Information & communication | 2026 |
| Codiifyr Limited | Wholesale & retail | 2025 |
| Codogni Leicester Limited | Hospitality | 2013 |
| Cody Digging Ltd | Construction | 2021 |
| Coedma Freight International Limited | Transport & logistics | 2012 |
| Coffee & Kitchen Ltd | Hospitality | 2026 |
| Coffee (Leicester) Limited | Wholesale & retail | 2008 |
| Coffee 360 Limited | Hospitality | 2025 |
| Coffee at the Stables Ltd | Hospitality | 2024 |
| Coffee Corner Cafe Ltd | Hospitality | 2024 |
| Coffee House Court Management Company Limited | Households | 2019 |
| Coffee Lovers (Arnold) Limited | Wholesale & retail | 2013 |
| Coffee Lovers (Beeston) Limited | Wholesale & retail | 2013 |
| Coffee Lovers (Bingham) Limited | Wholesale & retail | 2013 |
| Coffee Lovers (Bulwell) Limited | Wholesale & retail | 2015 |
| Coffee Lovers (Coalville) Limited | Wholesale & retail | 2011 |
| Coffee Lovers (Hucknall) Limited | Wholesale & retail | 2013 |
| Coffee Lovers (Long Eaton) Limited | Wholesale & retail | 2012 |
| Coffee Lovers (Lutterworth) Limited | Wholesale & retail | 2010 |
| Coffee Lovers (Mapperley) Limited | Wholesale & retail | 2012 |
| Coffee Lovers (Syston) Limited | Hospitality | 2016 |
| Coffee Lovers CDT Limited | Wholesale & retail | 2017 |
| Coffee Lovers Group Ltd | Professional & scientific | 2013 |
| Coffee Lovers Limited | Professional & scientific | 2010 |
| Coffee Maison Ltd | Manufacturing | 2019 |
| Coffee UN Limited | Hospitality | 2025 |
| Cofford & Co Property Finance Ltd | Financial services | 2009 |
| Cogent Services Ltd | Financial services | 2025 |
| Cognat-Ive Ltd | Professional & scientific | 2025 |
| Cogney Ltd | Wholesale & retail | 2023 |
| Cognisive Consulting Ltd | Information & communication | 2023 |
| Cognitive Behavioural Therapy (CBT) Ltd | Health & social care | 2015 |
| Cognitoma Ltd | Information & communication | 2026 |
| Cognytics Ltd | Information & communication | 2018 |
| Cohesive Maintenance & Gardens Ltd | Construction | 2024 |
| Cohesive Solutions Ltd | Administrative & support | 2025 |
| Coin-Op Launderette Ltd | Other services | 2019 |
| Coker Design and Build Ltd | Construction | 2021 |
| COL Beattie Floors & Walls Ltd | Construction | 2018 |
| COL LYE Ltd | Wholesale & retail | 2024 |
| COLAB2 CIC | Health & social care | 2024 |
| Colaton Gains Ltd | Transport & logistics | 2015 |
| Colbourne & Barker Limited | Real estate | 2025 |
| Cold & Hot Ltd | Transport & logistics | 2019 |
| Cold Feet Cooling Systems Limited | Construction | 2025 |
| Cold Higham Properties Limited | Real estate | 1996 |
| Coldfevermusic Ltd | Information & communication | 2010 |
| Coldharbour Marine Limited | Professional & scientific | 2009 |
| Coldharbour Technology Limited | Financial services | 2017 |
| Coldstore Installation Services Ltd | Construction | 2014 |
| Coldstore Solutions Ltd | Construction | 2014 |
| Cole Builders (Leicester) Limited | Construction | 2025 |
| Coleburne Properties Limited | Real estate | 2017 |
| Coleman Civils Ltd | Construction | 2016 |
| Coleman Engineering Limited | Professional & scientific | 2011 |
| Coleridge Ruskin Ltd | Wholesale & retail | 2024 |