| Catap Limited | London | 2022 |
| Catapult Analytics Ltd | Beaconsfield | 2021 |
| Catapult Business Finance Limited | Ossett | 2025 |
| Catapult Growth Fund Limited | Spalding | 2006 |
| Catapult Growth Managers GP Limited | Spalding | 2006 |
| Catapult Holdings Limited | Spalding | 2005 |
| Catapult Money Ltd | Welham Green | 2025 |
| Catapult Productions Ltd | Southwark | 2008 |
| Catapult Ultimate Holdings Limited | Spalding | 2013 |
| Catapult Venture Managers Limited | Spalding | 1999 |
| CATARAS44 Ltd | Stratford Upon Avon | 2025 |
| Catbang 926 Limited | London | 2006 |
| Catbrook Finance Limited | Caldicot | 2014 |
| Catch Global Limited | Salisbury | 2026 |
| Catch RM Group Limited | Salisbury | 2018 |
| Catchpoint (UK) Trustee Company Ltd | Blackburn | 2025 |
| Catchpoint Investments Ltd | Blackburn | 2025 |
| Catchpoint Management Ltd | Blackburn | 2025 |
| Catdromeda Holdings Ltd | Harrow | 2020 |
| Catella Apam Capital Partners Limited | Manchester | 2023 |
| Catella Capital Limited | Manchester | 2023 |
| Catelron Ltd | London | 2024 |
| Catena Bidco Limited | Reading | 2025 |
| Catenarian Arch Holding Limited | Peterborough | 2016 |
| Cater Allen Limited | London | 1943 |
| Cater Cunningham Limited | Thetford | 2010 |
| Cater Willis Limited | Essex | 2005 |
| Cater-Kwik Group Limited | Ulverston | 2016 |
| Caterer Holdings Ltd | London | 2026 |
| Caterers Choice Holdings Limited | Huddersfield | 2025 |
| Caterfield Limited | London | 2004 |
| Caterfood Holdings Limited | Slough | 2008 |
| Catering Projects (Topco) Limited | Chesterfield | 2019 |
| Catering Projects Holdings Limited | Chesterfield | 2023 |
| Caterlease Limited | London | 1992 |
| Caterleisure Group Limited | Bradford | 2022 |
| Caterminch Limited | South Shields | 2019 |
| Caterpillar Financial Services (UK) Limited | Solihull | 1990 |
| Catertech Holdings Limited | Cardiff | 2019 |
| Catesby Holdings Limited | Daventry | 2024 |
| Catfoss Enterprises Limited | Driffield | 2022 |
| Catfoss Finance Limited | Driffield | 2001 |
| Catfoss Hire Holdings Limited | Brandesburton | 2021 |
| Catfoss Industrial Holdings Limited | Driffield | 2023 |
| Catfoss Investments Limited | Driffield | 2018 |
| Catfoss Limited | Brandesburton | 2017 |
| Catfoss Modular Limited | Brandesburton | 2021 |
| Catfoss P1 Limited | Driffield | 2023 |
| Catfoss P2 Limited | Driffield | 2023 |
| Catfoss P3 Limited | Bridlington | 2023 |
| Catfoss P4 Limited | Brandesburton | 2017 |
| Catfoss P5 Limited | Driffield | 2023 |
| Catgm Holding Ltd | Croydon | 2026 |
| Cath Kidston Acquisitions Limited | Brentwood | 2010 |
| Cath Kidston Mezzco Limited | Brentwood | 2010 |
| Cath Kidston Pfsco Limited | Brentwood | 2010 |
| Cathcart Energy Holdings Limited | Dunfermline | 2020 |
| Cathcart Financial Planning Limited | Farnham | 2017 |
| Cathcart Group Holdings Limited | Edinburgh | 2020 |
| Cathcart Holdings Limited | Enniskillen | 2020 |
| Cathcart Technology Holdings Limited | Edinburgh | 2020 |
| Cathcor Limited | Billingshurst | 2002 |
| Cathedral Capital (1998) Limited | London | 1997 |
| Cathedral Capital Holdings Limited | London | 1997 |
| Cathedral EYE Holdings Ltd | Belfast | 2021 |
| Cathedral Financial Planning (UK) Ltd | Ilkley | 2014 |
| Cathedral Holdings International (London) Limited | Nottingham | 2020 |
| Cathedral Holdings Limited | Chelmsford | 2000 |
| Cathedral Leasing Holdings Limited | Tamworth | 2011 |
| Cathedral Lodge Limited | London | 2018 |
| Cathedral Mortgages Ltd | Hereford | 2026 |
| Cathedral Surety Limited | Norwich | 2025 |
| Cathedral Underwriting Limited | London | 2019 |
| Cathedral View Holdings Limited | Truro | 2006 |
| Cathedral Wealth Management Limited | Chichester | 2014 |
| Cathedral Wealth Planning Ltd | Worcester | 2018 |
| Cathelco Holdings Ltd | Chesterfield | 2018 |
| Catherall Group Holdings Ltd | Sheffield | 2025 |
| Catherine Adams Financial Planning Limited | Ballymena | 2014 |
| Catherine Etherington Financial Services Limited | Ashbourne | 2020 |
| Catherine J Bennett Ltd | Bedford | 2025 |
| Catherine Mcniven Commercial & Business Finance Ltd | Kilmarnock | 2026 |
| Catherine Richardson Associates Limited | Taunton | 2005 |
| Catherine Spode and Associates Ltd | London | 2017 |
| Catherine Watkins Ltd | Benfleet | 2026 |
| Cathexis UK Holdings III Limited | Leeds | 2019 |
| Cathexis UK Holdings IV Limited | Leeds | 2022 |
| Cathexis UK Holdings Limited | Leeds | 2015 |
| Catholic Insurance Service Limited | Thame | 2002 |
| Catholic Working Mens Club Company Limited | Newry | 1886 |
| Cathsar Limited | Leicester | 2012 |
| Cathy Gale Limited | Doncaster | 2021 |
| Cathyland Limited | London | 2021 |
| Catinsight Ltd | Deal | 2016 |
| Catkin Consulting Limited | Chertsey | 2016 |
| Catley Family Holdings Limited | Doncaster | 2025 |
| Catlin Regeneration Ltd | London | 2021 |
| Catlin Risk Solutions Limited | London | 1983 |
| Catlin Underwriting Services Limited | London | 1985 |
| Catlyng Limited | Felixstowe | 2025 |