| Countrywide Design Holdings Ltd | Slough | 2011 |
| Countrywide Eco Limited | Worcester | 2011 |
| Countrywide Eco Solutions Limited | Worcester | 2011 |
| Countrywide Hire Limited | Biggleswade | 2010 |
| Countrywide Machinery Services Limited | Esher | 2014 |
| Countrywide Residential Lettings Nominees Limited | Leighton Buzzard | 2019 |
| Countrywidemarkets Ltd. | Worcester | 2000 |
| Countwise Europe Limited | Bedford | 2013 |
| County & Leisure Estates Limited | London | 1988 |
| County ALL Trades Services Limited | Wrexham | 2011 |
| County AU Pairs Ltd | Kent | 2002 |
| County Bars Ltd | Seaton | 2021 |
| County Castles Limited | Stevenage | 2003 |
| County Contractors Ltd | Bristol | 2025 |
| County Equestrian Stables Limited | Newport | 2018 |
| County Farm Butchers Ltd | Bonnyrigg | 2008 |
| County Garage (Barnstaple) Limited | Plymouth | 1965 |
| County Grounds Landscapes Limited | Plymouth | 2014 |
| County Homes (Wessex) Limited | Swindon | 1947 |
| County Linen Service Limited | Chelmsford | 1985 |
| County Marquees (East Anglia) Ltd | Halstead | 2025 |
| County Mechanical Services Limited | Maidstone | 2007 |
| County Park Management Limited | Swindon | 1991 |
| County Property & Facility Maintenance Limited | Rochester | 2025 |
| County Residential Limited | Edinburgh | 2001 |
| County Staff Ltd. | Lynsted | 2000 |
| County Stairlifts Limited | Calne | 2024 |
| County the Home Improvers Limited | Heathfield | 2022 |
| County Washrooms South Limited | Chelmsford | 2026 |
| County Windows Ltd | Pershore | 2011 |
| Countyclean Groundworks and Installations Limited | Chorley | 2016 |
| Countyclean Sweepers Limited | Chorley | 2016 |
| Countylink Limited | Portsmouth | 2013 |
| Cour Bay Ltd | Campbeltown | 2017 |
| Cour Estate Ltd | Campbeltown | 2014 |
| Cour Farm Ltd | Campbeltown | 2014 |
| Course Beetle Ltd | Telford | 2015 |
| Course Explorer Ltd | Nottingham | 2013 |
| Court DE Wyck (Northern Field) Management Company Limited | Gloucester | 2024 |
| Court DE Wyck Management Company Limited | Bristol | 2021 |
| Court Lodge Property Management Ltd | New Malden | 2007 |
| Courtesy Cabs (Scotland) Limited | Glasgow | 2013 |
| Courtesy Call Limited | St. Leonards-On-Sea | 2002 |
| Courtesy Ltd | London | 2024 |
| Courtesyfair Limited | Southampton | 1998 |
| Courthall Management Limited | Coleraine | 2007 |
| Courtlands Skip Hire (UK) Limited | Ware | 2009 |
| Courtmart Limited | Sutton Coldfield | 1994 |
| Courtney 11 Ltd | London | 2008 |
| Courtney Anthony Green Limited | West Bromwich | 2025 |
| Courtney Bishopp Agency Limited | Chandlers Ford Eastleigh | 1995 |
| Courtney Smith Holdings Limited | Hertfordshire | 2007 |
| Courts & Co Limited | Burnham On Crouch | 2024 |
| Courts Accountants Ltd | Buckingham | 2015 |
| Courts Nominees Ltd | Carlisle | 1998 |
| Courtyard Architectural Hardware Limited | Evesham | 2015 |
| Courtyard Estates (Suffolk) Limited | Ipswich | 1994 |
| Courtyard Land Management Ltd - the | Coleraine | 2004 |
| Courtyard Motors Limited | Walsall | 2014 |
| Courvoisier Limited | Bracknell | 2025 |
| Cousin Food Centre Ltd | Potters Bar | 2024 |
| Cousins Construction Limited | Kent | 2006 |
| Coussens (Haulage) Limited | Bexhill | 2006 |
| Couts Limited | West Midlands | 1990 |
| Couttie Limited | Sevenoaks | 2020 |
| Coutts Scotland Nominees Limited | Edinburgh | 1984 |
| Couture Carpets Limited | Midhurst | 2006 |
| Couture Eyewear Limited | Leicester | 2024 |
| Couverture Home Limited | London | 1998 |
| Covcomm Limited | Southam | 2006 |
| Covcon Limited | Coventry | 2020 |
| Cove Close Ballyronan Ltd | Ballyclare | 2003 |
| Cove Financial Planning Limited | Leeds | 2024 |
| Cove Road 1953 Limited | Gourock | 2014 |
| Covebeck Limited | Bridgend | 2026 |
| Covem Ltd | Wigan | 2025 |
| Covenant Investments Limited | Romford | 2022 |
| Covenbrook Fabrications Limited | Braintree | 1978 |
| Covenbrook Limited | Braintree | 2014 |
| Coveney Consulting Group Ltd | Clevedon | 2020 |
| Covent Garden (43 Management) Limited | London | 2004 |
| Covent Garden Land Limited | Blackham | 2002 |
| Covent Garden Management Services Limited | London | 2018 |
| Coventis Corporate Services Ltd | Kenilworth | 2007 |
| Coventry Anaesthetic Practice Limited | Evesham | 2010 |
| Coventry Carbide Tools Ltd | Coventry | 2011 |
| Coventry Crane Hire Limited | Halesowen | 2013 |
| Coventry Greyhounds Club Limited | Birmingham | 2003 |
| Coventry Management Co Ltd | Maghera | 2004 |
| Coventry P & H Holdings Limited | Coventry | 2011 |
| Coventry Road Secretarial Bureau Limited | London | 2015 |
| Coventry Welding Workshop Ltd | Coventry | 2010 |
| Covepride Limited | London | 2017 |
| Cover Investments Limited | Bury | 2020 |
| COVER365 Limited | Bury | 2025 |
| Covercraft Ltd | Waterlooville | 2001 |
| Covered by the Word UK Limited | London | 2006 |
| Covered Outdoor Solutions Limited | St. Ives | 2011 |
| Coverest Limited | Bridgend | 2025 |
| Coverhills Limited | Lancashire | 1976 |