| Chronicles of ST Mary's Ltd | Gloucester | 2019 |
| Chronicles of the Residuum Ltd | Leyland | 2024 |
| Chrono Games Limited | Newcastle Upon Tyne | 2017 |
| Chronoclasm Limited | Sheffield | 2017 |
| Chronold Ltd | Worthing | 2022 |
| Chronowin Limited | Tonypandy | 2026 |
| Chrstphr Music Production Limited | Milton Keynes | 2025 |
| Chrysalis Arts Development Limited | Skipton | 2007 |
| Chrysalis Discos Limited | Hull | 2003 |
| Chrysalis Fitness Ltd | Corby, Northants | 2019 |
| Chrysalis London | Worcester | 2014 |
| Chrysalis Music Production Ltd | London | 2026 |
| Chrysalis Promotions Ltd | Leeds | 2004 |
| Chrysalis Records Limited | London | 1968 |
| Chrysalis Weddings & Events Ltd | Pevensey | 2024 |
| Chrysolite Enterprises Limited | London | 1976 |
| Chrysostom Limited | Richmond | 2024 |
| CHS Attractions Ltd | Bolton | 2023 |
| Chuanpiaopiao Ltd | Oldham | 2024 |
| Chuchu Nwagu Productions Limited | London | 2026 |
| Chuck E Cheese UK Limited | Gravesend | 2025 |
| Chuck Elliott Studio Ltd | Bristol | 1995 |
| Chuckl Ltd | Ely | 2020 |
| Chuckle Busters Ltd | Bristol | 2013 |
| Chuckle Productions CIC | Stone | 2009 |
| Chuckwalla Touring Ltd | Harrow | 2020 |
| Chuckys Gym Ltd | Benfleet | 2022 |
| Chuffed With HER Own Company Limited | Ruislip | 2025 |
| Chufty Lights Limited | Lewes | 2024 |
| Chug Industries Limited | Manchester | 1997 |
| Chugg Music International Limited | London | 2022 |
| Chukar Events Ltd | Wolverhampton | 2025 |
| Chuldow Martial Arts Rothwell Ltd | Leeds | 2025 |
| Chump's Comedy Ltd | London | 2024 |
| Chun Bros Limited | London | 2003 |
| Chun SEH DAU School of Shaolin Kung FU Ltd | Coalville | 2020 |
| Chunkarhu Ltd | London | 2022 |
| Chunky Fish Ltd | Falmouth | 2021 |
| Chunky Hamster Ltd | Rotherham | 2015 |
| Chunky Hedgehogs Limited | Sheffield | 2024 |
| Chupa Yachting Limited | London | 2002 |
| Church Art Limited | Redditch | 2019 |
| Church Events Group Ltd | Derby | 2020 |
| Church Gresley (Old Hall) Bar Services Limited | Swadlincote | 1996 |
| Church Hunters Ltd | Woodbridge | 2024 |
| Church Mouse Studio Limited | Kent | 2003 |
| Church of Sound Ltd | London | 2019 |
| Church of Sound Otherwise Limited | London | 2024 |
| Church Recordings Limited | London | 2021 |
| Church Road Studio Limited | Hove | 1996 |
| Church Street Training Trading AS EMS on the Avon Ltd | Stratford-Upon-Avon | 2026 |
| Church Stretton Golf Club Limited | Stretton | 2019 |
| Church Studio Limited | Redditch | 2019 |
| Church View Pool Limited | Spalding | 2023 |
| Churcher's College Enterprises Limited | Petersfield | 2006 |
| Churches Conservation | Northampton | 2013 |
| Churches Conservation Trust Enterprises Limited | Northampton | 2012 |
| Churchfield House Ltd | Great Harwood | 2014 |
| Churchgate Artists Studios C.I.C. | Leicester | 2020 |
| Churchgate Fisheries Limited | Burnham-On-Crouch | 2020 |
| Churchill Beckett Partners Ltd | Essex | 2019 |
| Churchill Forge Trust | Nr Kidderminster | 1981 |
| Churchill Productions Limited | Stanmore | 1997 |
| Churchill Tattoo Limited | Exeter | 2026 |
| Churchill's Boxing Gym Ltd | London | 2021 |
| Churchill's Finest Hour Limited | Burnham | 2021 |
| Churchmen's Snooker Club Community Interest Company | Abergele | 2024 |
| Churros Time Ltd | Rushden | 2023 |
| Churston Golf Club Limited | Brixham | 1991 |
| Chutchi Face Recordings Limited | London | 2020 |
| Chutney Chorus Ltd | London | 2011 |
| Chuuvam Ltd | Bolton | 2025 |
| Chxf Ltd | London | 2026 |
| Chyf Pdsc Limited | Y Felinheli | 2023 |
| Chyverton Forest Limited | Ferndown | 2026 |
| Chêne Ltd | Sevenoaks | 2019 |
| CI Implementation Limited | Bristol | 2018 |
| CI Play Limited | Birmingham | 2024 |
| CI7 Ltd | Warrington | 2026 |
| Ciac Productions Ltd | London | 2023 |
| Cian Ducrot Ltd | London | 2020 |
| Ciana Studios Ltd | London | 2025 |
| Cians Little Trotters CIC | Mansfield | 2026 |
| Ciara Langtry Sport Psychology Ltd | Whitley Bay | 2024 |
| Ciara Mageean Limited | Mediacityuk | 2021 |
| Ciaran Stow Limited | Belfast | 2019 |
| Ciarvia Ltd | Shipley | 2026 |
| Ciboney Limited | Basildon | 2017 |
| Cicada Limited | London | 2007 |
| Cicada Sports Consulting Ltd | London | 2024 |
| Cicle Records Limited | London | 2022 |
| Ciclo Magic Ltd | Market Rasen | 2016 |
| Ciento Gym Ltd | Bideford | 2025 |
| Cieven Investments Limited | Woking | 2009 |
| Cigam Productions Ltd. | Liverpool | 2013 |
| Cigar Cigar Music Limited | Stockton-On-Tees | 2021 |
| Cikhostar Ltd | London | 2026 |
| Cilfynydd RFC 1893 Limited | Cilfynydd | 2022 |
| Cilgerran Coracle Festive Committee Ltd | Cardigan | 2023 |
| Cilgwyn Golf Club Cyfyngedig | Lampeter | 1986 |