| Catalyst Vineyard Church | Aberdeen | 2009 |
| Catalytic Contracting Limited | Ilford | 2014 |
| Catalytix Limited | Warrington | 2018 |
| Catamaranx Ltd | London | 2021 |
| Catapult (International) Limited | Poole | 2024 |
| Catapwlt Ltd | Swansea | 2021 |
| Catari Investment Properties Ltd | Cardiff Bay | 2012 |
| Catatel Ltd | London | 2016 |
| Cataverde Ltd | Pudsey | 2017 |
| Catch a Fade Barbers Ltd | London | 2019 |
| Catch Dating Limited | London | 2022 |
| Catch Pigeon Ltd | London | 2020 |
| Catch the Feeling Limited | Billericay | 2019 |
| Catch the Fire Bournemouth | Bournemouth | 1999 |
| Catch the Fire Ministries (UK) | Wrexham | 2006 |
| Catch-It Pest Control Limited | Harlow | 2014 |
| Catchems Corner Hair Design Ltd | Stoke-On-Trent | 2023 |
| Catchingandcomfort Ltd | London | 2023 |
| Catchy Nails Ltd | Birmingham | 2023 |
| Catchylook Beauty Salon Ltd | Bradford | 2025 |
| Catedral DA Familia Ltd | London | 2019 |
| Catedral DO Avivamento Limited | Swindon | 2023 |
| Categorical Determination Limited | York | 2015 |
| Category Compass Ltd | Barnet | 2012 |
| Cateled Ltd | Telford | 2020 |
| Catella Luxury Suites Ltd | London | 2026 |
| Catena Holding (UK) Ltd | Nottingham | 2014 |
| Catena Trustees Limited | Coventry | 1947 |
| Catenian Association Limited (the) | Coventry | 1966 |
| Cater Care Leeds Ltd | Leeds | 2008 |
| Cater Needs (N.W.) Limited | Liverpool | 1995 |
| Cater Recruitment Ltd | Withnell | 2016 |
| Caterbar Limited | Cheshire | 2018 |
| Catercleanse Limited | Stockport | 2012 |
| Caterelle Limited | Maldon | 1979 |
| Caterepair Limited | Darwen | 2009 |
| Caterer News Ltd | Near Chippenham | 2020 |
| Caterers Supplies Limited | Solihull | 2002 |
| Caterham and Lotus Seven Club Limited | Abergavenny | 2021 |
| Caterham Barracks Community Trust | Caterham | 1999 |
| Catering by Paulo Ltd | Royston | 2017 |
| Catering Design Group Limited | Warrington | 1990 |
| Catering Home (Scot) Ltd | Glasgow | 2025 |
| Catering, Logistics & Events Limited | London | 2008 |
| Caterix Ltd | Harlow | 2026 |
| Caterlyst Limited | Watford | 2006 |
| Caterpillar Club Ltd | London | 2022 |
| Caterpillars Childcare Ltd | Walton-On-Thames | 2016 |
| Catfireparty Ltd | Rochdale | 2023 |
| Catfish Soup Limited | London | 2017 |
| Catford Barbers Ltd | Northampton | 2018 |
| Catford Community Church | London | 2004 |
| Catford CUT Ltd | London | 2026 |
| Catford Express Ltd | London | 2020 |
| Catford Nail Limited | London | 2024 |
| Cath Christie @ Dermasmooth Ltd | Darlington | 2016 |
| Cathar Investments Ltd. | London | 2017 |
| Cathar Properties Ltd. | Aberdeen | 2017 |
| Cathay Birchen Holdings Limited | Hitchin | 2019 |
| Cathay Holding Ltd | Cardiff | 2019 |
| Cathays Barber Shop Limited | Cardiff | 2019 |
| Cathcart Services Limited | Sarisbury Green Southampton | 2002 |
| Cathedral Auto Locksmiths Ltd | Ely | 2023 |
| Cathedral Funeral Services (Hereford) Limited | Walsall | 2004 |
| Cathedral House Care Services Limited | Huddersfield | 2018 |
| Cathedral International - Assembly of GOD Ltd | London | 2004 |
| Cathedral of Life Ltd | London | 2025 |
| Cathedral of Worship and Praise (CWP) London-Uk | West Norwood | 2024 |
| Cathedral Quarter Risk Management Ltd | Lincoln | 2023 |
| Cathedrals' Administration and Finance Association | Sutton Coldfield | 2012 |
| Catherine Beckett Community Centre | Deepdale Road Preston | 2000 |
| Catherine Boden Ltd | Wilmslow | 2016 |
| Catherine Bunning Beauty Ltd | Taunton | 2022 |
| Catherine Carter Hair & Beauty (Newark) Limited | Newark | 2010 |
| Catherine Carter Limited | Newark | 2004 |
| Catherine Daniels Consultancy Ltd | Leeds | 2015 |
| Catherine Hamlin Foundation International | London | 2025 |
| Catherine Kavanagh Ltd | Rotherham | 2021 |
| Catherine Kennedy Limited | | 1989 |
| Catherine Limited | Dunmow | 2013 |
| Catherine Lutman Design Limited | Birmingham | 2017 |
| Catherine Miller Print Limited | Edgware | 2024 |
| Catherine Nails Ltd | London | 2022 |
| Catherine Nails Shoreditch Ltd | London | 2026 |
| Catherine Oakes Limited | Barrow In Furness | 2002 |
| Catherine Reading Limited | Loughborough | 2003 |
| Catherine Taylor (Wokingham) Ltd | Hook | 2024 |
| Catherine Taylor Ltd | Hook | 2019 |
| Catherine Taylor Pamper Parties Ltd | Hook | 2023 |
| Catherine Temple Spa Limited | Wigan | 2020 |
| Catherwood Consultancy Ltd. | Glasgow | 2023 |
| Cathkin Clean Scotland Limited | Aberdeen | 1996 |
| Cathleen Merkel Ltd | London | 2019 |
| Cathles Holdings Ltd | Glasgow | 2026 |
| Cathode RAY Limited | London | 2019 |
| Catholic Child Welfare Society (Diocese of Middlesbrough) | Middlesbrough | 1982 |
| Catholic Gym Society CIC | Basingstoke | 2025 |
| Catholic Mothers Ireland Ltd | Omagh | 2023 |
| Catholic Trust for England and Wales | | 2003 |
| Catholic Women Association Kenya | London | 2020 |