| CEO Integrated Services Ltd | Birmingham | 2024 |
| CEO Live Ltd | Warrington | 2025 |
| Ceon Machinery Control Ltd | Cookstown | 2015 |
| Cepac Limited | London | 1997 |
| Cepha Controls Limited | Droitwich | 1996 |
| Cephacharis Ltd | Stockton-On-Tees | 2025 |
| Cephas TEC Ltd | Loughborough | 2020 |
| Cephei Trading Limited | Manchester | 2022 |
| Cephos Electronic Circuits Limited | Swanley | 1980 |
| Cephos Relays Limited | Swanley | 2024 |
| Cepreaga Ltd | Maidstone | 2020 |
| Ceptrade Ltd | London | 2021 |
| Cera Bloom Ltd | Birmingham | 2025 |
| Cera Dynamics Limited | Stoke On Trent | 1981 |
| Cera Fragrances Ltd | London | 2025 |
| Cera Metal Specialist Ltd | London | 2023 |
| Cerad Covenant Consulting Ltd | Croydon | 2015 |
| Ceram Supplies Ltd | Stoke-On-Trent | 2015 |
| Ceramaro Limited | Aylesford | 2025 |
| Ceramart UK Limited | Swadlincote | 2016 |
| Ceramaspeed Limited | Birmingham | 1973 |
| Ceramdent Ltd | London | 2019 |
| Ceramel Limited | Croydon | 1999 |
| Ceramet UK Dental Solutions Ltd | Macclesfield | 1958 |
| Ceramex Ltd | Gainsborough | 2004 |
| Ceramexe CIC | Exeter | 2022 |
| Cerami Games Ltd | Kington | 2025 |
| Ceramic Additive Manufacturing Limited | Hixon,Stafford | 2022 |
| Ceramic Art Laboratory Ltd | Edinburgh | 2012 |
| Ceramic Core Systems Limited | Huntingdon | 1993 |
| Ceramic Crafts Limited | Cowes | 2004 |
| Ceramic Decorating Technology Ltd | Stoke-On-Trent | 2021 |
| Ceramic Drying Systems Limited | Longton Stoke-On-Trent | 1983 |
| Ceramic Fitch Limited | Redhill | 2019 |
| Ceramic Insight Ltd | Cambridge | 2024 |
| Ceramic Inspirations Ltd | Chorley | 2024 |
| Ceramic Kitchens Limited | Nottingham | 2021 |
| Ceramic Line Ltd | London | 2025 |
| Ceramic Modelling Services Limited | Wolstanton,Newcastle Under Lyme | 1983 |
| Ceramic Product Design Limited | Sale | 1989 |
| Ceramic Safe Limited | Uxbridge | 2025 |
| Ceramic Seals Ltd. | Oldham | 1961 |
| Ceramic Studios Scotland Ltd. | Aberdeen | 2021 |
| Ceramic Substrates & Components Limited | Newport | 1968 |
| Ceramica Cleopatra UK Limited | London | 2019 |
| Ceramicoat International Limited | London | 2018 |
| Ceramicoat Limited | Bristol | 2010 |
| Ceramicon Limited | London | 2022 |
| Ceramicraft Limited | Crewe | 2016 |
| Ceramics by Design Limited | Longton | 2006 |
| Ceramics Sculpture Studio Ltd | London | 2019 |
| Ceramident Technics Limited | Walsall | 2004 |
| Ceramishield Ltd | Motherwell | 2025 |
| Ceramisys Limited | Sheffield | 2001 |
| Ceramitech UK Training and Logistics Limited | Stockport | 2019 |
| Ceramoda Limited | Croydon | 2025 |
| Ceramtec UK Ltd | Southampton | 1965 |
| Cerana Limited | Burton-On-Trent | 2004 |
| Cerano Ceramics Limited | Gloucester | 2025 |
| Cerashield Limited | Taunton | 2023 |
| Ceratech Accuratus Limited | Bordon | 2014 |
| Ceratex Engineering Limited | Langport | 1995 |
| Ceraworks Limited | Newcastle Upon Tyne | 2025 |
| Cerberus Chemicals Limited | Ormskirk | 2012 |
| Cerberus Fabrication Ltd | Doncaster | 2025 |
| Cerberus Motor Paints Limited | Aylesbury | 2014 |
| Cerberus Organic Dog Food Ltd | Bournemouth | 2018 |
| Cerberus Paints (UK) Ltd | High Wycombe | 2021 |
| Cerberus Strength Ltd | Inverness | 2025 |
| Cerberus Studios Limited | Shifnal | 2019 |
| Cerberus Watches Ltd | Nottingham | 2021 |
| Cercons UK Limited | London | 2014 |
| Cerdac Limited | Dungannon | 1953 |
| Cerdic Foundries Limited | Chard | 1970 |
| Cereal Bakery Ltd | Blackburn | 2021 |
| Cereal Technology Limited | Basford Nottingham | 1991 |
| Cerealto UK Limited | Worksop | 1999 |
| Cerebro One Ltd | London | 2025 |
| Cerebrovia Therapeutics Ltd | Durham | 2025 |
| Cerebus Communications Limited | Walsall | 2000 |
| Cereform Limited | London | 1938 |
| Cerefuze Medical UK Ltd | Glasgow | 2022 |
| Ceremonies and Events (Northern) Limited | Andover | 2017 |
| Ceremonies and Events Limited | Andover | 2017 |
| Cerenaptiq Technologies Ltd | Solihull | 2025 |
| Ceres Bites Limited | London | 2025 |
| Cerexar Limited | London | 2003 |
| Cerfoma Limited | Leeds | 2024 |
| Ceridwen Carpentry, Joinery & Cabinetry Ltd | St. Columb | 2025 |
| Cerinca Ltd | Wigan | 2024 |
| Ceris Hair Ltd | London | 2023 |
| Cerispa Ltd | Penarth | 2016 |
| Cerium Coating Limited | London | 2019 |
| Cerium Group Limited | London | 1972 |
| Cerium Visual Technologies Limited | London | 1993 |
| Cermag Limited | | 1978 |
| Cermatpro Limited | Canterbury | 2015 |
| Cerne Abbas Brewery Ltd | Dorchester | 2014 |
| Cerney Cheese Limited | Cirencester | 2016 |
| Cero Group Limited | Carlisle | 2025 |