| Clipper Investments Limited. | High Wycombe | 1985 |
| Clippie Limited | Canvey Island | 2018 |
| Clippin’ Marvellous Dog Grooming Ltd | Basingstoke | 2023 |
| Clippin’ Marvellous Ltd | Basingstoke | 2023 |
| Clive Barrington Richley Limited | Peterborough | 2022 |
| Clive Black Management Ltd | London | 2015 |
| Clive Dell PGA Ltd | Cuffley | 2011 |
| Clive Emson Limited | Ashford | 2006 |
| Clive Marian | Sandhurst | 2024 |
| Clive Menzies & Associates Limited | London | 1999 |
| Clive Michael Shepherd Ltd | Greenford | 2023 |
| Clive Morris Consulting Limited | Romford | 2014 |
| Clive Pugh Limited | Shropshire | 2005 |
| Clive Road Management Company Limited | Cardiff | 2018 |
| Clive Vale Property Management Limited | London | 2009 |
| Cliveden Four Limited | Romford | 1985 |
| Clivus Limited | London | 2007 |
| Clix Media Ltd | Bolton | 2011 |
| Clixon Ltd | London | 2019 |
| CLJ Holdings Hereford Ltd | Hereford | 2016 |
| CLK Yacht Ltd | London | 2025 |
| Cllg Limited | Godalming | 2012 |
| CLM Imaging Ltd | London | 2024 |
| CLM Safety Limited | Caerphilly | 2009 |
| Cloadby Ltd | Coventry | 2024 |
| Cloaked SIX Limited | Hastings | 2018 |
| Cloburn International Ltd | Carlisle | 2007 |
| Cloch IP SPV 2026 (NO. 1) Limited | Glasgow | 2025 |
| Clock Tower Fields Limited | Eastcote | 2008 |
| Clockwork Cleaning Services Ltd | Worthing | 2019 |
| Clockwork Club Ltd | Liverpool | 2016 |
| Clockwork Underfloor Heating Ltd | Sale | 2023 |
| Clogau ST. David's Gold Mines Limited | Rhyl | 1988 |
| Cloghanramer Media Ltd | Newry | 2016 |
| Cloisters Freehold Ltd | Borehamwood | 2012 |
| Cloisters Management (NI) Limited -the | Belfast | 2001 |
| Clonex Limited | Honiton | 2012 |
| Clonsilla Services Limited | Co Londonderry | 2004 |
| Cloo Chat Limited | Cardiff | 2018 |
| Cloomy Limited | London | 2011 |
| Close Brothers Building Services Limited | Billericay | 2017 |
| Close Brothers Environmental Services Limited | Billericay | 2017 |
| Close Brothers Labour Supply Limited | Billericay | 2017 |
| Close Brothers Plant Hire Limited | Billericay | 2017 |
| Close Brothers Reactive Maintenance Limited | Billericay | 2017 |
| Close Brothers Scientific Services Limited | Billericay | 2017 |
| Close Business Finance Limited | London | 2000 |
| Close Quarter Productions Ltd | Edgware | 2006 |
| Close Your Company Limited | Manchester | 2023 |
| Closed Canopy Consultancy Limited | Pulborough | 2023 |
| Closehurst Limited | Upminster | 1982 |
| Closeprotec Security Intelligence Consultancy Ltd | Cardiff | 2017 |
| Closer to the Numbers Limited | Holmfirth | 2018 |
| Closerstill AD Limited | London | 2025 |
| Closerstill Ruby Limited | London | 2024 |
| Closr.Com Limited | Bexhill-On-Sea | 2009 |
| Clothing UN Limited | Swansea | 2013 |
| Clotta Limited | Chelmsford | 2023 |
| Cloud Accounting Academy Ltd | Tamworth | 2022 |
| Cloud AI Technologies Ltd | Leicester | 2023 |
| Cloud Code Ltd | Loughton | 2010 |
| Cloud Colleague Ltd | Doncaster | 2016 |
| Cloud Comms 365 UK Limited | Worthing | 2016 |
| Cloud Financial Outsourcing Ltd | Barnstaple | 2011 |
| Cloud Five Solutions Limited | London | 2018 |
| Cloud Native Software Ltd | Warrington | 2021 |
| Cloud Nine Footcare Ltd | Doncaster | 2022 |
| Cloud Pathways Tuition Limited | London | 2024 |
| Cloud Ridge Investment Group Ltd | Manchester | 2026 |
| Cloud Savings Company Limited | London | 2014 |
| Cloud Sparkle Co., Ltd. | Beckenham | 2025 |
| Cloud Storage Ltd | Cambridge | 2022 |
| Cloud Thistle Limited | Doncaster | 2026 |
| Cloud Water Control Limited | Preston, | 2018 |
| Cloudbase Consultancy Limited | Bournemouth | 2013 |
| Cloudburster Ltd | Salford | 2013 |
| Cloudcompare.Com Limited | Manchester | 2017 |
| Clouders Limited | Leigh On Sea | 2008 |
| Cloudesley Ventures Limited | London | 2017 |
| Cloudfm Air & Rail Limited | Colchester | 2013 |
| Cloudfm Consulting Limited | Colchester | 2009 |
| Cloudgroup Ltd | London | 2013 |
| Cloudharbor Tech Ltd | Edinburgh | 2025 |
| Cloudit Accounting Limited | Hastings | 2016 |
| Cloudlateral Ltd | Doncaster | 2016 |
| Cloudlegal Limited | Penzance | 2011 |
| CLOUDN8TIVE Holdings Ltd | Mildenhall | 2023 |
| Cloudreach Limited | London | 2022 |
| Cloudstar Consulting Ltd | Cardiff | 2015 |
| Cloudstream Software Ltd | Doncaster | 2026 |
| Cloudthing Limited | London | 2025 |
| Cloudtop Industry Co., Ltd | Kenilworth | 2018 |
| Cloudtour Limited | Southampton | 2014 |
| Cloudverse Partners Ltd | Reading | 2024 |
| Cloudy Holdings Ltd | Norwich | 2022 |
| Cloughfarming Ltd | Horncastle | 2026 |
| Cloughfin View Management Ltd | Ballyclare | 2013 |
| Clounagh Engineering Limited | Craigavon | 1983 |
| Clova White Line Limited | Walderslade Chatham | 2001 |
| Clove Luckwell Road Ltd | Bristol | 2024 |