| Carisbrooke Clearance Limited | Nottingham | 2023 |
| Carl Cosby Ltd | Newton Abbot | 2025 |
| Carl Land Limited | Widnes | 2024 |
| Carl LEE Joinery Ltd | Ashton-Under-Lyne | 2024 |
| Carl Puno Ltd | Inverness | 2023 |
| Carl Rogers (Wales) Limited | Carmarthen | 2003 |
| Carl Taylor Building and Roofing Ltd | Matlock | 2021 |
| Carl's Handyman Service Ltd | Waterlooville | 2020 |
| Carl-Michael Bryan | Haringey | 2015 |
| Carla Hull Legal Services Limited | Solihull | 2011 |
| Carla Lloyd Event Management Ltd | High Wycombe | 2024 |
| Carlac Group Holdings Limited | Leeds | 1973 |
| Carlain Property Limited | Cheltenham | 2012 |
| Carleford Limited | Coventry | 2025 |
| Carleton Limited | Chesham | 1999 |
| Carleton Mill Management Company Limited | Ilkley | 2002 |
| Carleys Limited | Chatham | 2024 |
| Carling Lewis Productions Limited | Cirencester | 2016 |
| Carling Recruitment Limited | Godalming | 1999 |
| Carlisle Family Law Limited | Carlisle | 2014 |
| Carlisle Haulage & Transport Solutions Ltd | Enfield | 2024 |
| Carlisle Racecourse Company Limited(The) | Durdar Road | 1906 |
| Carlogie House (Services) Limited | Manchester | 1975 |
| Carlroth Company Limited | Beckenham | 2018 |
| Carlsson Walker Ltd | Southend-On-Sea | 2007 |
| Carlton Apartments (ST Ives) Limited | St. Ives | 2015 |
| Carlton Bayliss Limited | Harrogate | 2026 |
| Carlton Cards Limited | Dewsbury | 1899 |
| Carlton Corporation Limited | Manchester | 2003 |
| Carlton Croft Limited | London | 1999 |
| Carlton Dene (Management) Limited | Epsom | 1999 |
| Carlton Dwayne Michael Mclawrence Limited | Swindon | 2024 |
| Carlton Education and Training Ltd. | Chesterfield | 1999 |
| Carlton Food & Wine Ltd | Romford | 2023 |
| Carlton Fuels Limited | Birchwood | 1986 |
| Carlton Invest Limited | London | 2007 |
| Carlton London Limited | Loughton | 2025 |
| Carlton Nominees Limited | Middlesbrough | 2025 |
| Carlton PCM Ltd | Crumlin | 2020 |
| Carlton Power Trading NO. One Limited | Middlesbrough | 2015 |
| Carlton Power Trading NO. Two Limited | Middlesbrough | 2015 |
| Carlton Property Group Limited | Barnet | 2016 |
| Carlton Property Sales Ltd | Enfield | 2015 |
| Carlton Road 1961 Limited | Wickford | 2014 |
| Carlton Sports Company Limited | Shirebrook | 1949 |
| Carlwich Bearing Co., Ltd | Beckenham | 2023 |
| Carlyle Construction Limited | Liverpool | 2018 |
| Carlyle Management, Ltd | London | 2019 |
| Carlyon Bay Hotel Limited | Torquay | 1957 |
| Carma Living Limited | Bury | 2009 |
| Carman Property Limited | Diss | 2010 |
| Carmar Accountancy Limited | Westcliff-On-Sea | 2020 |
| Carmarthenshire Wood Fuels Ltd | Swansea | 2020 |
| Carmatsrus Ltd | Batley | 2021 |
| Carmen Joanne Hermina Smart Ltd | London | 2024 |
| Carmen Rosina Smith Limited | Wolverhampton | 2024 |
| Carmichael UK Trades & Labour Limited | Thame | 2004 |
| Carmichaeluk Civil Engineering Recruitment Limited | Thame | 2004 |
| Carn Springs Camping Club Ltd | Dyfed | 2020 |
| Carna Limited | Potters Bar | 1959 |
| Carnaby Civils Ltd | Immingham | 2024 |
| Carnaby Investments Limited | Liverpool | 1957 |
| Carnaby Street Ltd | London | 2016 |
| Carnach MOR Ltd | Waternish | 2024 |
| Carnage Digital Limited | Hamble Le Rice | 2019 |
| Carnage Distribution Ltd | Sheffield | 2025 |
| Carnarvon Grove 1961 Limited | Sutton-In-Ashfield | 2014 |
| Carnarvon Properties (London) Limited | London | 1974 |
| Carnation Publications Limited | London | 2017 |
| Carnbank Property Management Ltd | Ballyclare | 2005 |
| Carneco Foods Limited | Leigh-On-Sea | 2013 |
| Carnegie Street N1 Limited | London | 2018 |
| Carnetown Studios Ltd | Cardiff | 2014 |
| Carnextdoor EU Ltd | Belfast | 2022 |
| Carney Hall Management Company Limited | Belfast | 2001 |
| Carnicas Serrano UK Ltd | London | 2022 |
| Carnie Meadows Limited | Glasgow | 2024 |
| Carnival (Charles Dickens) Limited | London | 2007 |
| Carnival Relocations Limited | Gerrards Cross | 2009 |
| Carnmoney Court Management Company Limited | Ballyclare | 2004 |
| Carnmoon Limited | Portballintrae | 2011 |
| Carnoustie 1972 Limited | Worksop | 2013 |
| Carnrich Limited | London | 2007 |
| Carnroe Drive 1960 Limited | Carrickfergus | 2014 |
| Carnteel Limited | Lurgan | 2012 |
| Carnview Management Company Ltd | Bangor | 2025 |
| Carnwood Management Limited | Ballyclare | 2003 |
| Caro Developments Baltic Limited | Liverpool | 2020 |
| Caro Developments GS Limited | Liverpool | 2023 |
| Caro Sales and Lettings Limited | Liverpool | 2020 |
| Caroandluke Limited | Blackpool | 2024 |
| Carol Anne Brotherson Ltd | London | 2024 |
| Carol Lesley Prockter Ltd | Spennymoor | 2024 |
| Carol Norman Anderson Ltd | Birmingham | 2025 |
| Carol Ogden Travel Limited | Wigan | 2009 |
| Carole ANN Rheinhard Ltd | Swansea | 2024 |
| Carole ANN Richardson Ltd | Leicester | 2022 |
| Carole Anne Watson Ltd | London | 2024 |
| Carole Erica Holmback Costar Limited | Chorley | 2023 |
| Carolina Sweden Limited | London | 2023 |