| Cohesionfitness Ltd | Cardiff | 2025 |
| Cohort Creations Ltd | Barrow In Furness | 2024 |
| Cohort Performance Ltd | Bristol | 2025 |
| COI Prints Ltd | Dartford | 2022 |
| Coin Drop Theatre Ltd | Southampton | 2023 |
| Coin Flip Limited | London | 2023 |
| Coininn Games Limited | Southend-On-Sea | 2004 |
| Cojabepo Productions Limited | Salford | 2023 |
| Coker Brand Design Limited | Norwich | 2011 |
| Cokesco Limited | Surbiton | 2012 |
| COL & KAT Hoult Ltd | Narberth | 2022 |
| COL Films Limited | London | 2025 |
| Cola BOY Productions Ltd | Borehamwood | 2023 |
| Cola Leisure CIC | Peterborough | 2024 |
| Cola Ship Limited | Peterborough | 2024 |
| Colab Creative Worldwide Ltd | Poole | 2026 |
| Colab Health & Fitness Ltd | Kinross | 2025 |
| Colab Theatre Ltd. | Harrow | 2013 |
| Colantoni Ltd | Bishops Cleeve | 2024 |
| Colasanto Academy of Dance Limited | Swansea | 2023 |
| Colauf UK CIC | Norwich | 2026 |
| Colbert Entertainment Ltd | London | 2014 |
| Colchester & North East Essex Building Preservation Trust | Colchester | 1995 |
| Colchester Airsoft Ltd | Colchester | 2025 |
| Colchester Arts Centre | | 1984 |
| Colchester Chinese Culture Society CIC | Clacton-On-Sea | 2021 |
| Colchester City Football Club Limited | Colchester | 2022 |
| Colchester Dance HQ Ltd | Ipswich | 2017 |
| Colchester Events Ltd | Colchester | 2020 |
| Colchester Fitness and Recovery Group Limited | Colchester | 2024 |
| Colchester Fitness Centre Ltd | Colchester | 2020 |
| Colchester Fringe Ltd | Colchester | 2024 |
| Colchester GUN Club Ltd | Chelmsford | 2007 |
| Colchester Indoor Bowls Club Limited | Colchester | 2022 |
| Colchester Karate Club Limited | Colchester | 2023 |
| Colchester Mercury Productions Ltd | Colchester | 2014 |
| Colchester Mercury Theatre Limited | Colchester | 1947 |
| Colchester Mercury Trading Ltd | Colchester | 2014 |
| Colchester Rugby Limited | Colchester | 2016 |
| Colchester Society of Model and Experimental Engineers Limited | Essex | 1995 |
| Colchester Tennis Academy Limited | Colchester | 2020 |
| Colchester United Community Foundation | Colchester | 2014 |
| Colchester United Community Trading Limited | Colchester | 2015 |
| Colchester United Football Club Limited | Colchester | 1992 |
| Colchester Weightlifting Ltd | Colchester | 2020 |
| Colchester ZOO Enterprises Limited | Stanway | 1976 |
| Colclough-Tsang Media Limited | Reigate | 2018 |
| Cold Bread Ltd | Southwark | 2008 |
| Cold Brew Events Ltd | Cramlington | 2016 |
| Cold Case Investigation Unit Ltd | Loughborough | 2020 |
| Cold Climate Expeditions Limited | Corsham | 1995 |
| Cold Coffee Music Ltd | London | 2013 |
| Cold Mezze Limited | London | 2025 |
| Cold Open Theatre Ltd | Glasgow | 2024 |
| Cold Springs Farm GUN Club Ltd | Buxton | 2024 |
| Cold Star Media Limited | Manchester | 2013 |
| Cold-Form Ltd | London | 2024 |
| Coldairbnb Limited | Chipping Norton | 2023 |
| Coldblow Equestrian Centre Limited | Maidstone | 2016 |
| Coldgun Limited | London | 2025 |
| Coldham Hall Sailing Club (2009) Limited | Norwich | 2009 |
| Coldharbour Blue Limited | London | 2025 |
| Coldharbour Mill Trust Limited | Cullompton | 2007 |
| Coldharbour Sports & Social Club | Dorking | 2008 |
| Coldingham Investments Limited | Duns | 2013 |
| Coldingham Sands Community Company | Eyemouth | 2008 |
| Coldplace Tribute Ltd | Scunthorpe | 2025 |
| Coldpress & Locomotion Special Projects Ltd | Tewkesbury | 2022 |
| Coldra Productions Limited | Newport | 2026 |
| Coldstream Sporting Ltd | Hereford | 2007 |
| Coldwell Boxing Ltd | Rotherham | 2011 |
| Coldwell Lifestyle CIC | Doncaster | 2025 |
| Coldwell Sports Limited | Rotherham | 2013 |
| Coldyhill Hollow Ltd | Scarborough | 2025 |
| Cole and Lopez Ltd | Preston | 2018 |
| Cole Arts Limited | Stanney Oaks | 2018 |
| Cole Clarke Racing Ltd | Doncaster | 2021 |
| Cole Creation Limited | London | 2023 |
| Cole Kitchenn Theatrical Ltd | London | 2020 |
| Cole Moreton Ltd | Eastbourne | 2017 |
| Cole Music Productions (UK) Limited | Liverpool | 1994 |
| Colebrook Dance Ltd | Market Rasen | 2026 |
| Colebrooke Consulting Limited | East Sussex | 1983 |
| Colebrooke Productions Ltd | Whitby | 2024 |
| Colectivo Futuro Ltd | Southend-On-Sea | 2012 |
| Coleeds Limited | Leeds | 2023 |
| Coleford Bowling & Social Club | Coleford | 2023 |
| Colehill Community Library Limited | Bournemouth | 2012 |
| Colejo Limited | London | 2015 |
| Coleman & Basinghall Limited | London | 2009 |
| Coleman Events Ltd | Ilminster | 2026 |
| Coleman Racing Limited | Saundersfoot | 2024 |
| Coleraine and District Motor Club Limited | Coleraine | 1964 |
| Coleraine and District Society of Model Engineers Ltd | Limavady | 1991 |
| Coleraine Anglers Association Limited | Coleraine | 2013 |
| Coleraine Football Club Limited | Coleraine | 2005 |
| Coleraine Grammar Hockey C.I.C. | Coleraine | 2024 |
| Coleraine Grammar Rugby Association Ltd | Coleraine | 2024 |
| Coleraine Old Boys Rowing Association - the | Coleraine | 2003 |
| Colerne Rugby Football Club Limited | Colerne | 2022 |