| Croner Taxwise Limited | Manchester | 1995 |
| Croner-I Limited | Manchester | 2025 |
| Cronexrabo Limited | Dudley | 1982 |
| Cronly Investment Management Ltd | Coventry | 2013 |
| Cronox Ltd | Cheadle | 2012 |
| Cronstown 1957 Limited | Newtownards | 2013 |
| Crooked Beverage Co. Limited | Chesterfield | 1993 |
| Crooklets Investments Limited | London | 2021 |
| Croome International Transport (Leeds) Limited | London | 2010 |
| Crooners - the Show Limited | Romford | 2005 |
| Crop Specialists (N.I.) Limited | Coleraine | 1993 |
| Croplus Biotech Ltd. | London | 2015 |
| Croptek BIO Ltd | King'S Lynn | 2009 |
| Crosby Intruder Alarms Limited | Liverpool | 2010 |
| Crosby Textor IP Holdings Limited | London | 2016 |
| Crosland 1976 Limited | Huddersfield | 2013 |
| Crosley & SON Limited | Chelmsford | 2000 |
| Cross 24/7 Ltd | Omagh | 2013 |
| Cross Channel Challenge Limited | Haslemere | 2000 |
| Cross Checked Limited | Leeds | 2025 |
| Cross Country Co Automotive Ltd | Berkeley | 2021 |
| Cross Country Rail Limited | London | 2003 |
| Cross Farm Phase 2 Management Company Limited | London | 2024 |
| Cross Green Energy Ltd | West Thurrock | 2010 |
| Cross Keys Green 1960 Limited | Leicester | 2014 |
| Cross Keys PUB Limited | Newport Pagnell | 2016 |
| Cross Point Wakefield Management Company Limited | London | 2015 |
| Cross Quarters Ltd | London | 2024 |
| Cross Utility Ltd | London | 2018 |
| Cross Vale Dairy (Residents Company) Limited | Liverpool | 2000 |
| Cross-Thomas Limited | Penarth | 2017 |
| Crossborder for International Trading & Services Ltd | Manchester | 2026 |
| Crossborder for International Trading Limited | Manchester | 2026 |
| Crossborder International Trading Ltd | Manchester | 2026 |
| Crossbourne Construction Limited | Coalville | 1981 |
| Crossco (1411) Limited | Gateshead | 1984 |
| Crossco (1427) Limited | Cleckheaton | 2017 |
| Crossco (1433) Limited | Barnsley | 2018 |
| Crossco (1434) Limited | Barnsley | 2018 |
| Crossco (173) | Gateshead | 1995 |
| Crossco (454) Limited | Newcastle Upon Tyne | 1983 |
| Crossco (489) Limited | Blandford Forum | 2000 |
| Crossco (912) Limited | Newcastle Upon Tyne | 2005 |
| Crosscrown Care Services Limited | Poole | 2010 |
| Crossed Atlantic Ltd | London | 2025 |
| Crossfield Management Company Limited | Enfield | 1983 |
| Crossfit Leicester Ltd | Leicester | 2013 |
| Crossflight Group Holdings Limited | Slough | 2021 |
| Crossflight Holdings Limited | Slough | 2020 |
| Crossgates Quarries Limited | Huddersfield | 1959 |
| Crosshire Assist Ltd | Bourne | 2020 |
| Crosskeys Travel Limited | Folkestone | 2015 |
| Crosskeys UK Limited | Kent | 2006 |
| Crossleigh Court Limited | London | 1999 |
| Crossley Axminster UK Limited | Kidderminster | 2014 |
| Crossley's School of Motoring Limited | Burnley | 2022 |
| Crossling CBM Limited | Stockton Heath | 1922 |
| Crossrail Bidco Limited | London | 2017 |
| Crossrail Midco Limited | London | 2017 |
| Crossroads Therapy Services Limited | London | 2024 |
| Crossroads Veterinary Services Limited | Bristol | 2011 |
| Crossways Composites Limited | Dartford | 2024 |
| Crossways Development Management Company Limited | Bolton | 2016 |
| Crossways Property Limited | Middlesex | 2003 |
| Crosswhite Limited | London | 2014 |
| Crossworld for International Services Limited | Manchester | 2026 |
| Crosthwaite Terrace 1957 Limited | Berwick-Upon-Tweed | 2014 |
| Crostini Enterprises Limited | Ballymoney | 2013 |
| Crotty Properties Ltd | Torquay | 2024 |
| Crouch Commodities Limited | London | 2002 |
| Crouch END (NR) Limited | London | 2024 |
| Crouch Hall Road Management Limited | London | 2012 |
| Crouch Valley Kitchen Ltd | Wickford | 2026 |
| Crouch Valley Nutrition Ltd | Wickford | 2026 |
| Crouch Valley Property Ltd | Wickford | 2026 |
| Croucher Consultants Limited | Crawley | 1998 |
| Crow Aesthetic Ltd | London | 2022 |
| Crow Tree Design Ltd. | Haverfordwest | 2021 |
| Crowd IC Limited | Newcastle | 2022 |
| Crowded Studio Ltd | Coventry | 2012 |
| Crowdfunding Ltd | London | 2018 |
| Crowe Horwath Limited | London | 2010 |
| Crowe Scaffolding Services Limited | Caterham | 2011 |
| Crowell Hill Consulting Limited | Chinnor | 2023 |
| Crowland Terrace Limited | London | 2002 |
| Crowlands Driving School Ltd | Romford | 2004 |
| Crowlands Limited | Romford | 2009 |
| Crowley Carbon International Services 2 Limited | Marlow | 2018 |
| Crowley Carbon International Services Limited | Marlow | 2018 |
| Crowlink Holdings Limited | St. Albans | 2015 |
| Crown & Ledger Property Ltd | Doncaster | 2026 |
| Crown and Strand Limited | London | 2025 |
| Crown Architectural Aluminium (UK) Limited | Solihull | 2008 |
| Crown Associates International Ltd | Aldershot | 2008 |
| Crown Brewery PLC | Cardiff | 1919 |
| Crown Buckley Limited | Cardiff | 1993 |
| Crown Buckley Taverns Limited | Cardiff | 1988 |
| Crown Building & Construction Ltd | Swansea | 2015 |
| Crown Building Management Limited | Lancing | 2016 |
| Crown Business Park Management Company Limited | Burnley | 2011 |