| Cobra Associates Limited | London | 2013 |
| Cobra Automation Limited | Belfast | 2011 |
| Cobra KAI Limited | Coventry | 2020 |
| Cobra MDS Limited | Dorchester | 2016 |
| Cobra Optics Limited | Stratford-Upon-Avon | 2000 |
| Cobra Services Limited | Stanmore | 2020 |
| Cobra Sport Exhausts Ltd | Sheffield | 2021 |
| Cobra Technologies Limited | London | 2011 |
| Cobtree Cafe Limited | Wimborne | 2017 |
| Cobweb Information (UK) Limited | Gateshead | 1998 |
| Cocade Trading Limited | Cardiff | 2020 |
| Cocafood Ltd | Newcastle Upon Tyne | 2014 |
| Cocellma Ltd | Kington | 2025 |
| Cochran Creative Condensing R&D Co., Ltd. | Kington | 2011 |
| Cochran Piping Solutions Ltd | Melksham | 2013 |
| Cochrane Design Ltd | London | 2025 |
| Cock at Stowe TDB Ltd | Stafford | 2022 |
| Cockayne Investment Management Ltd | Coventry | 2015 |
| Cockerel Ltd | Edinburgh | 2012 |
| Cocking Property Ltd | Huddersfield | 2023 |
| Cocklebank Conservations Limited | Derby | 1967 |
| Cocklewood Dairy Ltd | Northallerton | 2022 |
| Cockliffe House Hotel Limited | Nottingham | 2014 |
| Cockshut Road Residents Association Limited | East Sussex | 1973 |
| Coco & Ice Ltd | London | 2025 |
| Coco IVY Cockfosters Ltd | Hatfield | 1993 |
| Coco Pops Marine Ltd | London | 2025 |
| Coco Rose Limited | Warwick | 2009 |
| Coco Sea Ltd | London | 2020 |
| Coco Spheres Ltd | Amersham | 2024 |
| Coco Spice Ltd | Burgess Hill | 2017 |
| Coco Tilley Developments Limited | Caterham | 2016 |
| Coco's Car Ltd | Edinburgh | 2023 |
| Coco's Home Stays Ltd | Doncaster | 2024 |
| Coco's SW Limited | Crawley | 2008 |
| Cocoa & Cream Desserts Limited | Glasgow | 2021 |
| Cocoa Beautiful (U.K.) Ltd | London | 2013 |
| Cocoa Evolutions Ltd | Ringwood | 2024 |
| Cocoa Skye Ltd | Brora | 2018 |
| Cocoa Trading Limited | Bishop'S Stortford | 2009 |
| Cocon Developments Limited | Bangor | 1984 |
| Coconut & Timber Design Ltd | Manchester | 2025 |
| Coconut Breaks Ltd | Manchester | 2025 |
| Coconut Catering UK Ltd | Manchester | 2025 |
| Coconut Groove Ltd | London | 2021 |
| Coconutea Limited | Bromsgrove | 2020 |
| Cocoon Homewear Limited | Bristol | 2026 |
| Cocoon Innovation Limited | London | 2019 |
| Coculina Ltd | London | 2025 |
| COD to BE Trading Limited | London | 2018 |
| Codarin Management Limited | West Horndon | 2016 |
| Codaspire Limited | Cleethorpes | 2013 |
| Codata Solutions Ltd | London | 2024 |
| Codbrothers Limited | Birmingham | 2008 |
| Coddan Administration Ltd | London | 2015 |
| Coddan Bookkeeping & Accounting Service Ltd | London | 2005 |
| Coddan Practising Company Secretaries Ltd | London | 2006 |
| Coddan Trademarks Registration Service Ltd | London | 2006 |
| Code Chronicles Limited | Prescot | 2019 |
| Code Encryption Limited | Oxford | 2013 |
| Code Fish Technologies Ltd | Bromley | 2021 |
| Code Red Security Limited | London | 2003 |
| Codecrest Limited | Chorley | 1987 |
| Codegen (UK) Limited | Greenford | 2006 |
| Codegen Services Limited | Greenford | 2006 |
| Codelocks Limited | Berkshire | 2004 |
| Codem Group Limited | Peterborough | 2015 |
| Coder Tech Ltd. | London | 2025 |
| Codes Koala Ltd | Doncaster | 2025 |
| Codeshift Labs Ltd | London | 2026 |
| Codeside Limited | London | 2019 |
| Codet Construction Limited | Northwood | 2021 |
| Codewing Communications Limited | Canvey Island | 1996 |
| Codex Chocolate Limited | Kington | 2017 |
| Coding Protocols Ltd | London | 2014 |
| Codiun Rail Limited | Chippenham | 2022 |
| Codsqods Ltd | London | 2020 |
| Coe-Mix RMC Limited | Retford | 2010 |
| Coed Darcy Estates Management Ltd | London | 2011 |
| Coed Dewi Sant Ltd | Swansea | 2012 |
| Coekse Ltd | Manchester | 2022 |
| Coentech Limited | Chichester | 2003 |
| Coeurage Ltd | Buxton | 2009 |
| Coeus Technologies Limited | Horsham | 2014 |
| Coex Limited | Sheffield | 1985 |
| COF Solutions Group Limited | Warrington | 2019 |
| Cofathec Heatsave Limited | Manchester | 1978 |
| Coffee & Canapes Limited | Birmingham | 2015 |
| Coffee 1652 Limited | St Helens | 2011 |
| Coffee 212 Limited | Taunton | 2013 |
| Coffee @ Alisons Limited | Manchester | 2025 |
| Coffee Afrique Limited | Manchester | 2025 |
| Coffee Buy the Kilo Limited | Kingston Upon Thames | 2021 |
| Coffee COO Limited | Buckie | 2023 |
| Coffee Design (London) Limited | Washington | 2013 |
| Coffee Hiit Ltd | London | 2024 |
| Coffee Meet Ltd. | Glasgow | 2004 |
| Coffee Properties Limited | Bristol | 2022 |
| Coffee Shops Limited | Lichfield | 2009 |
| Coffee Wing Limited | London | 2015 |