| Covermaster Systems Limited | Croydon | 2005 |
| Covers Limited | Chichester | 1979 |
| Coverseal by Alfresco Pools Ltd | Cranbrook | 2021 |
| Coverstructures Property Limited | Ottery St Mary | 2016 |
| Coverview Limited | Brough | 1986 |
| Covest Homes Limited | Nottingham | 2012 |
| Covet Limited | Lincoln | 2004 |
| Covet.Co.Uk Limited | Lincoln | 2005 |
| COVID-19 Virus Compensation Limited | Harrogate | 2020 |
| Covington & Burling Limited | London | 2017 |
| Covisioners Ltd | London | 2025 |
| Covtteca Industrial Technology Co., Ltd | Beckenham | 2021 |
| Cowabunga Burgers Ltd | Manchester | 2025 |
| Cowan Motor Group Limited | Toddington | 2021 |
| Cowaq Scientific Corp Limited | Beckenham | 2015 |
| Cowbit Property Limited | Peterborough | 2021 |
| Cowbridge Food Festival Limited | Cowbridge | 2007 |
| Cowdreys 1970 Limited | Tonbridge | 2015 |
| Cowell Homes Limited | Castleford | 1999 |
| Cowen Signs Ltd | Wirral | 2024 |
| Cowgate Management Co Limited | Welton | 2012 |
| Cowie & Riding Limited | Bury | 1968 |
| Cowin BO Site Commodity Co., Ltd | Cambridge | 2017 |
| Cowin Co., Limited | Beckenham | 2014 |
| Cowling 1957 Limited | Keighley | 2013 |
| Cowlishaw Residents Green Space Limited | Oldham | 2011 |
| Cowpower Ltd | Colyton | 2020 |
| Cowrie Limited | London | 2013 |
| COX & Booth Ideas Ltd. | Saffron Walden | 1995 |
| COX & Danks Limited | Swaffham | 2012 |
| COX 3 Ltd | Glasgow | 2017 |
| COX and Robinson (Chemists) Limited | Manchester | 1936 |
| COX and Robinson Pharmacy Limited | Manchester | 1948 |
| COX Brothers General Works Limited | Maidstone | 1989 |
| COX Powertrain Holdings Limited | Shoreham-By-Sea | 2019 |
| Cox's Meadow Business Park Ltd | Wadebridge | 2022 |
| Coxeys Limited | Wrexham | 2015 |
| Coxon Brothers Limited | Bedale | 2009 |
| Coya Pearls Ltd | Glasgow | 2023 |
| Coyle Education Limited | London | 2020 |
| Coyle Holdings Limited | Newtownabbey | 2009 |
| Coyle Rail Limited | London | 2006 |
| Coyne Associates Ltd | Stourbridge | 2014 |
| Coyne Brothers Limited | Sutton Coldfield | 1946 |
| Coyne Group Holdings Ltd | Liverpool | 2023 |
| Coyte Farm Limited | Truro | 2012 |
| Cozmik Enterprises Limited | Hinckley | 2016 |
| Cozy Bunny Limited | Alresford | 2020 |
| Cozy Lofts Limited | Market Rasen | 2026 |
| Cozzzy Ltd | Stanmore | 2017 |
| CP Accounts (NI) Ltd | Omagh | 2025 |
| CP Construction Surfacing and Paving Contractors Ltd | Hinckley | 2022 |
| CP Dent Limited | Kingston Upon Thames | 2015 |
| CP Gene Company Limited | London | 2019 |
| CP Groundworks & Utilities Ltd | Bristol | 2025 |
| CP Mentoring Ltd | London | 2020 |
| CP Plastering Ltd | Hemel Hempstead | 2023 |
| CP Secretaries Limited | Stanmore | 2000 |
| Cpal Dartmouth Shareholder Limited | London | 2022 |
| Cpal Exeter Shareholder Limited | London | 2023 |
| CPB Twyford Limited | Royston | 2000 |
| Cpbs London Ltd | Orpington | 2025 |
| CPC Importers, Ltd. | | 2007 |
| CPC Project Services Trustee Limited | London | 2024 |
| CPD Distribution PLC | Sheffield | 1981 |
| CPD Estates Ltd | Wembley | 2008 |
| CPE Projects Solutions Limited | Stockport | 2016 |
| CPE Trust Co NO.1 Ltd | Norwich | 2023 |
| CPE Trust Co NO.2 Ltd | Norwich | 2023 |
| CPE Trust Co NO.3 Ltd | Norwich | 2023 |
| CPE Trust Co NO.4 Ltd | Norwich | 2023 |
| CPH Accountancy Ltd | Epsom | 2012 |
| CPI Developments Limited | Diss | 2015 |
| CPI Logistics Ltd | Dartford | 2021 |
| CPI Vaccines Limited | Redcar | 2008 |
| CPJ Suppliers Ltd | Flint | 2023 |
| CPK Welding Limited | Cheadle | 2012 |
| CPL Environmental Americas Limited | Sheffield | 1993 |
| CPL Environmental Limited | Sheffield | 1990 |
| CPL Executive Search Limited | Abingdon | 2020 |
| CPL Hargreaves Limited | Sheffield | 1929 |
| CPL Industrial Services (Holdings) Limited | Sheffield | 1997 |
| CPL Installations Ltd | Oldham | 1998 |
| CPL Logistics Limited | Sheffield | 1965 |
| CPL Property Limited | Sheffield | 1995 |
| CPL Third Party Logistics Limited | Rotherham | 2018 |
| CPL Trustees Limited | Sheffield | 1995 |
| Cplm Construction Services Limited | Harrow | 2019 |
| CPM Coins Limited | Poole | 2013 |
| Cpoms Holdings Limited | Skipton | 1999 |
| Cppi Bridgewater Place Nominee Limited | Woking | 2014 |
| Cpre Enterprises Limited | London | 2001 |
| Cproperty Investors Ltd | Dunoon | 2022 |
| CPS Harris Properties 2 Ltd | Cardiff | 2025 |
| CPS Real Estate Ltd | Peterborough | 2021 |
| Cptek Ltd | Colchester | 2023 |
| CPW Group Limited | Bournemouth | 2017 |
| CPW Holdings Ltd | Stalybridge | 2018 |
| CPW Investments Ltd | Edinburgh | 2010 |
| Cpwgco 1 Limited | Cobham | 2009 |