| Connectus Training Ltd | West Bromwich | 2024 |
| Connectwise Academy Ltd | Derby | 2024 |
| Connex Education Partnership Birmingham Limited | Chester | 2021 |
| Connex Education Partnership Bristol Limited | Chester | 2018 |
| Connex Education Partnership Liverpool Limited | Chester | 2018 |
| Connex Education Partnership North East Limited | Chester | 2021 |
| Connex Education Partnership Nottingham Limited | Chester | 2018 |
| Connex Education Partnership Warrington Limited | Chester | 2018 |
| Connexcel Limited | Eastleigh | 2011 |
| Connexion Pathways Ltd. | Leighton Buzzard | 2025 |
| Connexus Education Ltd | Warrington | 2022 |
| Connie's Academy Ltd | Bicester | 2023 |
| Conningsleigh Ltd | Lytham St. Annes | 2025 |
| Connor Feeney PT Ltd | Dundee | 2025 |
| Conor MAC Foundation | Mitcham | 2023 |
| Conor Whelan Tutoring Ltd | Weston-Super-Mare | 2024 |
| Conquer and Learn Limited | Edgware | 2004 |
| Conquer Fitness Coaching Ltd | Llanelli | 2023 |
| Conquer Learning Ltd | Nottingham | 2025 |
| Conquer Tutoring Ltd | Milton Keynes | 2023 |
| Conquer With Chloe Ltd | Rochester | 2023 |
| Conquest Athlete Management (CAM) Limited | London | 2017 |
| Conquest Schools Ltd | Peterborough | 2024 |
| Conradh NA Gaeilge Boirche Íochtar | Newry | 2011 |
| Conroy Enterprises Ltd | Helensburgh | 2023 |
| Conroy Performance Limited | Harpenden | 2021 |
| Conrrs Ltd | Bicester | 2021 |
| Cons & Teach Limited | Eastbourne | 2018 |
| Conscious Connected Care Limited | London | 2025 |
| Conscious Connected Creating CIC | Scarborough | 2026 |
| Conscious Connections Ltd | Chorley | 2021 |
| Conscious Creation Group Limited | London | 2023 |
| Conscious Culture Coach Ltd | London | 2021 |
| Conscious Gains Ltd | Leeds | 2023 |
| Conscious Happiness Ltd | Horley | 2016 |
| Conscious Learning Limited | Worthing | 2020 |
| Conscious Uplevels Ltd. | Kington | 2020 |
| Conscious Youth C.I.C. | Huddersfield | 2016 |
| Conseb Services Limited | Milton Keynes | 2014 |
| Consensus International Mediation Ltd | City Of London | 2025 |
| Consent Through Sport Ltd | Hastings | 2024 |
| Consentius Limited | Harrow | 2025 |
| Consequence UK Limited | Malvern | 2002 |
| Consera Training Limited | High Peak | 2023 |
| Conservative Friends of Ethiopia Ltd | London | 2021 |
| Conservative Humanists Limited | Horley | 2019 |
| Conservatoires UK | London | 2004 |
| Considerate Home Care Ltd | London | 2020 |
| Considered Capital Ltd | London | 2025 |
| Considered Coaching and Training Ltd. | Wetherby | 2016 |
| Considering Curriculum Ltd | Caldicot | 2019 |
| Consign (Norfolk) Ltd | Holt | 2017 |
| Consilia Consultants Ltd | Aylesbury | 2016 |
| Consilium Academies | Manchester | 2015 |
| Consilium Life Ltd | Manchester | 2025 |
| Consilium Tax Limited | London | 2011 |
| Consistent C Limited | London | 2026 |
| Consistent Education Limited | Manchester | 2020 |
| Consistent Forex Limited | London | 2017 |
| Consolidated Training Systems Limited | | 1983 |
| Consolo Training Academy Limited | London | 2021 |
| Consort Academy Limited | London | 2025 |
| Consortiq Limited | Croydon | 2015 |
| Consortiq US Ltd | Cardiff | 2016 |
| Consortium of Development Education Centres | Ambleside | 2010 |
| Consortium of Vocational and Educational Trainers Limited | Oxon | 2011 |
| Consortium Trust | Helmingham | 2016 |
| Consoultancy Limited | London | 2022 |
| Conspire Coaching Associates Limited | Leeds | 2017 |
| Constance Grant Dance Centre Limited | Sheffield | 2013 |
| Constant Training Ltd | Lancaster | 2022 |
| Constanza Chorus Limited | Ipswich | 2016 |
| Constellation Education Services Limited | Bristol | 2019 |
| Constellation Training Ltd | Birmingham | 2022 |
| Constellations Psychology Ltd | London | 2022 |
| Construct EP Services Ltd | Leigh On Sea | 2023 |
| Construct Pass Ltd | Ruislip, | 2026 |
| Construct Your Future Limited | Biggleswade | 2025 |
| Construct Your Life Ltd | Bromley | 2024 |
| Constructaskill Ltd | London | 2025 |
| Constructed Pathways CIC | Bourne | 2024 |
| Constructing Change CIC | York | 2025 |
| Construction & Railway Courses Ltd | Barking | 2020 |
| Construction and Plant Assessments Ltd | Doncaster | 2011 |
| Construction Awards Ltd | Preston | 2020 |
| Construction Builder Solution Ltd | Leeds | 2025 |
| Construction Certification Ltd | London | 2018 |
| Construction College Midland Limited | Birmingham | 2023 |
| Construction Courses Direct Ltd | Billericay | 2019 |
| Construction Development Centre Ltd | Hemel Hempstead | 2015 |
| Construction for Women CIC | Manchester | 2024 |
| Construction Gateway Limited | Ely | 2007 |
| Construction Health and Safety Group | Chertsey | 1981 |
| Construction Help Line Limited | London | 2010 |
| Construction Helper Support Ltd | London | 2024 |
| Construction Industry Training Academy Ltd | Swadlincote | 2015 |
| Construction Learning Centre Limited | Reading | 2011 |
| Construction LMS Training Ltd | Portadown | 2011 |
| Construction Logistics Academy Ltd | Maidstone | 2019 |
| Construction Management Training Ltd | Milton Keynes | 2011 |