| CC (Crawley) Newco 3 Limited | Professional & scientific | 2026 |
| CC (Crayford) Newco 1A Limited | Professional & scientific | 2026 |
| CC (Crayford) Newco Limited | Professional & scientific | 2011 |
| CC (Croydon) Newco Limited | Professional & scientific | 2024 |
| CC (Derby) Newco Limited | Professional & scientific | 2024 |
| CC (Dunstable) Newco Limited | Professional & scientific | 2024 |
| CC (ELY) Newco Limited | Professional & scientific | 2023 |
| CC (Exeter) Newco Limited | Professional & scientific | 2025 |
| CC (Farnborough) Newco Limited | Professional & scientific | 2024 |
| CC (Farnham) Newco Limited | Professional & scientific | 2026 |
| CC (Fort Kinnaird) Newco Limited | Professional & scientific | 2026 |
| CC (Harlow) Newco Limited | Professional & scientific | 2011 |
| CC (Hemel Hempstead) Newco Limited | Professional & scientific | 2025 |
| CC (Huntingdon) Newco Limited | Professional & scientific | 2023 |
| CC (Kidderminster) Newco Limited | Professional & scientific | 2023 |
| CC (Kirkcaldy) Newco Limited | Professional & scientific | 2023 |
| CC (Llantrisant) Newco Limited | Professional & scientific | 2025 |
| CC (New Malden) Newco 1A Limited | Professional & scientific | 2025 |
| CC (New Malden) Newco Limited | Professional & scientific | 2012 |
| CC (Newbury) Newco Limited | Professional & scientific | 2025 |
| CC (Norwich) Newco Limited | Professional & scientific | 2026 |
| CC (Oxford) Newco Limited | Professional & scientific | 2024 |
| CC (Peterborough) Newco 1A Limited | Professional & scientific | 2023 |
| CC (Plymouth) Newco Limited | Professional & scientific | 2025 |
| CC (Preston Capitol) Newco Limited | Professional & scientific | 2023 |
| CC (Pudsey) Newco 2 Limited | Professional & scientific | 2025 |
| CC (Pudsey) Newco Limited | Professional & scientific | 2010 |
| CC (Reading) Newco Limited | Professional & scientific | 2024 |
| CC (Rustington) Newco Limited | Professional & scientific | 2010 |
| CC (Slough) Newco Limited | Professional & scientific | 2023 |
| CC (Southampton) Newco Limited | Professional & scientific | 2024 |
| CC (Stirling) Newco Limited | Professional & scientific | 2025 |
| CC (Stourbridge) Newco Limited | Professional & scientific | 2023 |
| CC (Stratford-Upon-Avon) Newco Limited | Professional & scientific | 2024 |
| CC (Tamworth) Newco Limited | Professional & scientific | 2025 |
| CC (Worcester) Newco Limited | Professional & scientific | 2025 |
| Chadwell Heath VETS4PETS Limited | Professional & scientific | 2013 |
| Cheadle Hulme VETS4PETS Limited | Professional & scientific | 2011 |
| Cheshire Denture Clinic Ltd | Health & social care | 2021 |
| Chester Caldy VETS4PETS Limited | Professional & scientific | 2013 |
| Chester VETS4PETS Limited | Professional & scientific | 2004 |
| Chesterfield VETS4PETS Limited | Professional & scientific | 2002 |
| Circular Economy Consultants Ltd | Information & communication | 2024 |
| Cirencester VETS4PETS Limited | Professional & scientific | 2014 |
| Clacton VETS4PETS Limited | Professional & scientific | 2021 |
| Claims 4 Business Limited | Financial services | 2022 |
| Classic Mortgages Partnership Ltd | Financial services | 2007 |
| Clevedon VETS4PETS Limited | Professional & scientific | 2014 |
| Cleveleys VETS4PETS Limited | Professional & scientific | 2012 |
| Clifton VETS4PETS Limited | Professional & scientific | 2010 |
| Clitheroe VETS4PETS Limited | Professional & scientific | 2015 |
| Clowne VETS4PETS Limited | Professional & scientific | 2016 |
| Coalville VETS4PETS Limited | Professional & scientific | 2017 |
| Colchester VETS4PETS Advanced Practice Limited | Professional & scientific | 2021 |
| Colne VETS4PETS Limited | Professional & scientific | 2014 |
| Combined Utilities Limited | Professional & scientific | 1998 |
| Companion Care (Kings Lynn) Limited | Professional & scientific | 2009 |
| Companion Care (Aintree) Limited | Professional & scientific | 2010 |
| Companion Care (Andover) Limited | Professional & scientific | 2011 |
| Companion Care (Ashford) Limited | Professional & scientific | 2006 |
| Companion Care (Aylesbury) Limited | Professional & scientific | 2012 |
| Companion Care (AYR) Limited | Professional & scientific | 2011 |
| Companion Care (Banbury) Limited | Professional & scientific | 2013 |
| Companion Care (Barnsley Cortonwood) Limited | Professional & scientific | 2012 |
| Companion Care (Basildon Pipps Hill) Limited | Professional & scientific | 2013 |
| Companion Care (Basildon) Limited | Professional & scientific | 2010 |
| Companion Care (Beckton) Limited | Professional & scientific | 2001 |
| Companion Care (Bedford) Limited | Professional & scientific | 2012 |
| Companion Care (Belfast) Limited | Professional & scientific | 2012 |
| Companion Care (Bishopbriggs) Limited | Professional & scientific | 2010 |
| Companion Care (Bletchley) Limited | Professional & scientific | 2012 |
| Companion Care (Braintree) Limited | Professional & scientific | 2013 |
| Companion Care (Brentford) Limited | Professional & scientific | 2011 |
| Companion Care (Bridgend) Limited | Professional & scientific | 2009 |
| Companion Care (Bridgwater) Limited | Professional & scientific | 2011 |
| Companion Care (Brislington) Limited | Professional & scientific | 2011 |
| Companion Care (Bristol Filton) Limited | Professional & scientific | 2007 |
| Companion Care (Broadstairs) Limited | Professional & scientific | 2002 |
| Companion Care (Burgess Hill) Limited | Professional & scientific | 2013 |
| Companion Care (Cambridge Beehive) Limited | Professional & scientific | 2011 |
| Companion Care (Cambridge) Limited | Professional & scientific | 2001 |
| Companion Care (Cannock) Limited | Professional & scientific | 2012 |
| Companion Care (Canterbury) Limited | Professional & scientific | 2006 |
| Companion Care (Cardiff) Limited | Professional & scientific | 2001 |
| Companion Care (Charlton) Limited | Professional & scientific | 2001 |
| Companion Care (Chatham) Limited | Professional & scientific | 2011 |
| Companion Care (Chelmsford) Limited | Professional & scientific | 2004 |
| Companion Care (Cheltenham) Limited | Professional & scientific | 2012 |
| Companion Care (Chesterfield) Limited | Professional & scientific | 2002 |
| Companion Care (Chichester) Limited | Professional & scientific | 2008 |
| Companion Care (Chingford) Limited | Professional & scientific | 2008 |
| Companion Care (Chippenham) Limited | Professional & scientific | 2012 |
| Companion Care (Christchurch) Limited | Professional & scientific | 2009 |
| Companion Care (Colchester) Limited | Professional & scientific | 2006 |
| Companion Care (Corstorphine) Limited | Professional & scientific | 2011 |
| Companion Care (Coventry Walsgrave) Limited | Professional & scientific | 2012 |
| Companion Care (Cramlington) Limited | Professional & scientific | 2007 |
| Companion Care (Crawley) Limited | Professional & scientific | 2013 |
| Companion Care (Croydon) Limited | Professional & scientific | 2011 |
| Companion Care (Derby Kingsway) Limited | Professional & scientific | 2013 |