| Carlos CRO Holdings Limited | Leeds | 2026 |
| Carlos Developments Limited | Bourne End | 2004 |
| Carlos Street Capital Ltd | London | 2023 |
| Carloumi Private Finance Limited | Birmingham | 2011 |
| Carlow Group Ltd | London | 2026 |
| Carlson Homes Limited | Witham | 2017 |
| Carlson Wealth Management Limited | Cardiff | 2015 |
| Carlton Alarms Holdings Limited | Huddersfield | 2024 |
| Carlton Asset Management Limited | London | 1986 |
| Carlton Atlantic Travel & Events Holdings Ltd | Gloucester | 2025 |
| Carlton B Ltd | Glasgow | 2013 |
| Carlton Bingo Limited | Inverness | 2004 |
| Carlton Bonds PLC | County Durham | 2019 |
| Carlton Capital Management Ltd | London | 2025 |
| Carlton Carbon Limited | Stokesley | 2021 |
| Carlton Care Group (Holdings) Limited | Shipley | 2021 |
| Carlton Civil Engineering (Group) Limited | Poole | 2024 |
| Carlton Civil Engineering (Holdings) Limited | Stockbridge | 2013 |
| Carlton Collective Limited | London | 2023 |
| Carlton Court (Worthing) Ltd | Liverpool | 2025 |
| Carlton Equity Limited | Stirling | 2016 |
| Carlton Financial Planning Ltd | Norwich | 2002 |
| Carlton Gaming Limited | Inverness | 2001 |
| Carlton Holding Group Limited | Perth | 2020 |
| Carlton Holdings (2020) Ltd | Surrey | 2020 |
| Carlton Holdings (Pinchbeck ) Ltd | Spalding | 2022 |
| Carlton Investments (Holdings) Limited | Middlesbrough | 2014 |
| Carlton James Global Management Limited | Northampton/ | 2017 |
| Carlton James Private and Commercial Ltd | Ipswich | 2014 |
| Carlton Lending Limited | Co Durham | 2019 |
| Carlton Manor Weddings Limited | Leeds | 2020 |
| Carlton Music Publishers Limited | Amersham | 2018 |
| Carlton Nash & Co Limited | Bury | 2019 |
| Carlton Packaging Holdings Ltd | Bedford | 2022 |
| Carlton Smith Asset Protection Limited | Chorley | 2015 |
| Carlton Smith Financial Planning Ltd | Dunmere | 2017 |
| Carlton Smith Holding Company Limited | Stowmarket | 2017 |
| Carlton Smith Wills & Estate Planning Limited | Stowmarket | 2025 |
| Carlton Square Capital Limited | London | 2018 |
| Carlton ST John Financial Services Limited | | 1997 |
| Carlton Vale Investment Company Limited | Guildford | 1954 |
| Carlton-Sturman (Insurance Brokers) Limited | Cleveland | 1975 |
| Carlus Acquisitions Limited | Towcester | 2020 |
| Carlus Limited | Towcester | 2018 |
| Carlyle Banks & Co. Limited | London | 2010 |
| Carlyle Trust Limited(The) | Cardiff | 1940 |
| Carlyon Holdings Limited | Newquay | 2001 |
| Carmac Holdings Limited | Finedon | 2021 |
| Carman Consultancy Ltd | Worksop | 2023 |
| Carmar Ltd | Maghera | 2024 |
| Carmarnie Limited | Bury St. Edmunds | 2015 |
| Carmel Bidco Limited | Bristol | 2021 |
| Carmel Clothing Holdings Limited | London | 2025 |
| Carmel Greystone Ltd | Croydon | 2000 |
| Carmel Midco 1 Limited | Bristol | 2021 |
| Carmel VC Syndicate Limited | London | 2023 |
| Carmelcrest Holdings Ltd | Bishops Stortford | 2022 |
| Carmelli Holdings Limited | London | 2019 |
| Carmels Group Limited | Aylesbury | 2020 |
| Carmelspa Limited | London | 2026 |
| Carmen Constantine Capital Ltd | London | 2017 |
| Carmen Holdings Limited | Cheltenham | 2022 |
| Carmiburn Limited | London | 1998 |
| Carmichael Holdings Limited | Cheltenham | 2021 |
| Carmichael Investments Ltd | London | 2018 |
| Carmignac UK Ltd | London | 2022 |
| Carmin Consulting Ltd | Preston | 2025 |
| Carmon FIN Limited | London | 2022 |
| Carmoney Dealer Services Limited | Motherwell | 2022 |
| Carmoney Limited | Motherwell | 2014 |
| Carmonzo Limited | Eastbourne | 2022 |
| Carmoola Funding 1 Limited | London | 2021 |
| Carmoola Funding 2 Limited | London | 2024 |
| Carmoola Funding 3 Limited | London | 2025 |
| Carmoola Limited | London | 2020 |
| Carmosina Holdings Limited | London | 2018 |
| Carmunnock Holdings Ltd | Shrewsbury | 2017 |
| Carmyke Leasing Limited | Herstmonceux | 1994 |
| Carn MOR Ventures Limited | Glasgow | 2026 |
| Carn Olva Investments Limited | Penrith | 2026 |
| Carna Energy Holdings Limited | London | 2021 |
| Carnadale Limited | Ballymena | 2024 |
| Carnalbanagh Holdings Limited | Ballymena | 2024 |
| Carnall Holdings Ltd | Derby | 2019 |
| Carnamar Limited | Moy | 2025 |
| Carnarvon Group Limited | Woodford Green | 2018 |
| Carnatic Capital Holding Limited | Edinburgh | 2025 |
| Carnation Holdings Limited | Ilfracombe | 2020 |
| Carnbane Health Limited | Newry | 2018 |
| Carnbroe Holdings Limited | Glasgow | 2026 |
| Carne Global Financial Services (UK) Limited | London | 2005 |
| Carne Global Fund Managers (UK) Limited | London | 2017 |
| Carne International Financial Services (UK) Limited | London | 2018 |
| Carnegie Consumer Finance Limited | Glasgow | 2012 |
| Carnegie Enterprise Limited | London | 2025 |
| Carnegie EOT Ltd | Reigate, Surrey | 2025 |
| Carnegie Estate Management Ltd | Gorebridge | 2020 |
| Carnegie Financial Ltd | Gateshead | 2016 |
| Carnegie Financial Services Ltd | Kirkcaldy | 2010 |
| Carnegie Futures Limited | Bootle | 2013 |